23
24#include "opt_compat.h"
25
26#include <sys/param.h>
27#include <sys/systm.h>
28#include <sys/malloc.h>
29#include <sys/bio.h>
30#include <sys/buf.h>
31#include <sys/eventhandler.h>
32#include <sys/sysproto.h>
33#include <sys/filedesc.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36#include <sys/kthread.h>
37#include <sys/fcntl.h>
38#include <sys/file.h>
39#include <sys/limits.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42#include <sys/unistd.h>
43#include <sys/posix4.h>
44#include <sys/proc.h>
45#include <sys/resourcevar.h>
46#include <sys/signalvar.h>
47#include <sys/protosw.h>
48#include <sys/sema.h>
49#include <sys/socket.h>
50#include <sys/socketvar.h>
51#include <sys/syscall.h>
52#include <sys/sysent.h>
53#include <sys/sysctl.h>
54#include <sys/sx.h>
55#include <sys/taskqueue.h>
56#include <sys/vnode.h>
57#include <sys/conf.h>
58#include <sys/event.h>
59#include <sys/mount.h>
60
61#include <machine/atomic.h>
62
63#include <vm/vm.h>
64#include <vm/vm_extern.h>
65#include <vm/pmap.h>
66#include <vm/vm_map.h>
67#include <vm/vm_object.h>
68#include <vm/uma.h>
69#include <sys/aio.h>
70
71#include "opt_vfs_aio.h"
72
73/*
74 * Counter for allocating reference ids to new jobs. Wrapped to 1 on
75 * overflow. (XXX will be removed soon.)
76 */
77static u_long jobrefid;
78
79/*
80 * Counter for aio_fsync.
81 */
82static uint64_t jobseqno;
83
84#define JOBST_NULL 0
85#define JOBST_JOBQSOCK 1
86#define JOBST_JOBQGLOBAL 2
87#define JOBST_JOBRUNNING 3
88#define JOBST_JOBFINISHED 4
89#define JOBST_JOBQBUF 5
90#define JOBST_JOBQSYNC 6
91
92#ifndef MAX_AIO_PER_PROC
93#define MAX_AIO_PER_PROC 32
94#endif
95
96#ifndef MAX_AIO_QUEUE_PER_PROC
97#define MAX_AIO_QUEUE_PER_PROC 256 /* Bigger than AIO_LISTIO_MAX */
98#endif
99
100#ifndef MAX_AIO_PROCS
101#define MAX_AIO_PROCS 32
102#endif
103
104#ifndef MAX_AIO_QUEUE
105#define MAX_AIO_QUEUE 1024 /* Bigger than AIO_LISTIO_MAX */
106#endif
107
108#ifndef TARGET_AIO_PROCS
109#define TARGET_AIO_PROCS 4
110#endif
111
112#ifndef MAX_BUF_AIO
113#define MAX_BUF_AIO 16
114#endif
115
116#ifndef AIOD_TIMEOUT_DEFAULT
117#define AIOD_TIMEOUT_DEFAULT (10 * hz)
118#endif
119
120#ifndef AIOD_LIFETIME_DEFAULT
121#define AIOD_LIFETIME_DEFAULT (30 * hz)
122#endif
123
124FEATURE(aio, "Asynchronous I/O");
125
126static MALLOC_DEFINE(M_LIO, "lio", "listio aio control block list");
127
128static SYSCTL_NODE(_vfs, OID_AUTO, aio, CTLFLAG_RW, 0, "Async IO management");
129
130static int max_aio_procs = MAX_AIO_PROCS;
131SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_procs,
132 CTLFLAG_RW, &max_aio_procs, 0,
133 "Maximum number of kernel threads to use for handling async IO ");
134
135static int num_aio_procs = 0;
136SYSCTL_INT(_vfs_aio, OID_AUTO, num_aio_procs,
137 CTLFLAG_RD, &num_aio_procs, 0,
138 "Number of presently active kernel threads for async IO");
139
140/*
141 * The code will adjust the actual number of AIO processes towards this
142 * number when it gets a chance.
143 */
144static int target_aio_procs = TARGET_AIO_PROCS;
145SYSCTL_INT(_vfs_aio, OID_AUTO, target_aio_procs, CTLFLAG_RW, &target_aio_procs,
146 0, "Preferred number of ready kernel threads for async IO");
147
148static int max_queue_count = MAX_AIO_QUEUE;
149SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue, CTLFLAG_RW, &max_queue_count, 0,
150 "Maximum number of aio requests to queue, globally");
151
152static int num_queue_count = 0;
153SYSCTL_INT(_vfs_aio, OID_AUTO, num_queue_count, CTLFLAG_RD, &num_queue_count, 0,
154 "Number of queued aio requests");
155
156static int num_buf_aio = 0;
157SYSCTL_INT(_vfs_aio, OID_AUTO, num_buf_aio, CTLFLAG_RD, &num_buf_aio, 0,
158 "Number of aio requests presently handled by the buf subsystem");
159
160/* Number of async I/O thread in the process of being started */
161/* XXX This should be local to aio_aqueue() */
162static int num_aio_resv_start = 0;
163
164static int aiod_timeout;
165SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_timeout, CTLFLAG_RW, &aiod_timeout, 0,
166 "Timeout value for synchronous aio operations");
167
168static int aiod_lifetime;
169SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_lifetime, CTLFLAG_RW, &aiod_lifetime, 0,
170 "Maximum lifetime for idle aiod");
171
172static int unloadable = 0;
173SYSCTL_INT(_vfs_aio, OID_AUTO, unloadable, CTLFLAG_RW, &unloadable, 0,
174 "Allow unload of aio (not recommended)");
175
176
177static int max_aio_per_proc = MAX_AIO_PER_PROC;
178SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_per_proc, CTLFLAG_RW, &max_aio_per_proc,
179 0, "Maximum active aio requests per process (stored in the process)");
180
181static int max_aio_queue_per_proc = MAX_AIO_QUEUE_PER_PROC;
182SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue_per_proc, CTLFLAG_RW,
183 &max_aio_queue_per_proc, 0,
184 "Maximum queued aio requests per process (stored in the process)");
185
186static int max_buf_aio = MAX_BUF_AIO;
187SYSCTL_INT(_vfs_aio, OID_AUTO, max_buf_aio, CTLFLAG_RW, &max_buf_aio, 0,
188 "Maximum buf aio requests per process (stored in the process)");
189
190typedef struct oaiocb {
191 int aio_fildes; /* File descriptor */
192 off_t aio_offset; /* File offset for I/O */
193 volatile void *aio_buf; /* I/O buffer in process space */
194 size_t aio_nbytes; /* Number of bytes for I/O */
195 struct osigevent aio_sigevent; /* Signal to deliver */
196 int aio_lio_opcode; /* LIO opcode */
197 int aio_reqprio; /* Request priority -- ignored */
198 struct __aiocb_private _aiocb_private;
199} oaiocb_t;
200
201/*
202 * Below is a key of locks used to protect each member of struct aiocblist
203 * aioliojob and kaioinfo and any backends.
204 *
205 * * - need not protected
206 * a - locked by kaioinfo lock
207 * b - locked by backend lock, the backend lock can be null in some cases,
208 * for example, BIO belongs to this type, in this case, proc lock is
209 * reused.
210 * c - locked by aio_job_mtx, the lock for the generic file I/O backend.
211 */
212
213/*
214 * Current, there is only two backends: BIO and generic file I/O.
215 * socket I/O is served by generic file I/O, this is not a good idea, since
216 * disk file I/O and any other types without O_NONBLOCK flag can block daemon
217 * threads, if there is no thread to serve socket I/O, the socket I/O will be
218 * delayed too long or starved, we should create some threads dedicated to
219 * sockets to do non-blocking I/O, same for pipe and fifo, for these I/O
220 * systems we really need non-blocking interface, fiddling O_NONBLOCK in file
221 * structure is not safe because there is race between userland and aio
222 * daemons.
223 */
224
225struct aiocblist {
226 TAILQ_ENTRY(aiocblist) list; /* (b) internal list of for backend */
227 TAILQ_ENTRY(aiocblist) plist; /* (a) list of jobs for each backend */
228 TAILQ_ENTRY(aiocblist) allist; /* (a) list of all jobs in proc */
229 int jobflags; /* (a) job flags */
230 int jobstate; /* (b) job state */
231 int inputcharge; /* (*) input blockes */
232 int outputcharge; /* (*) output blockes */
233 struct buf *bp; /* (*) private to BIO backend,
234 * buffer pointer
235 */
236 struct proc *userproc; /* (*) user process */
237 struct ucred *cred; /* (*) active credential when created */
238 struct file *fd_file; /* (*) pointer to file structure */
239 struct aioliojob *lio; /* (*) optional lio job */
240 struct aiocb *uuaiocb; /* (*) pointer in userspace of aiocb */
241 struct knlist klist; /* (a) list of knotes */
242 struct aiocb uaiocb; /* (*) kernel I/O control block */
243 ksiginfo_t ksi; /* (a) realtime signal info */
244 struct task biotask; /* (*) private to BIO backend */
245 uint64_t seqno; /* (*) job number */
246 int pending; /* (a) number of pending I/O, aio_fsync only */
247};
248
249/* jobflags */
250#define AIOCBLIST_DONE 0x01
251#define AIOCBLIST_BUFDONE 0x02
252#define AIOCBLIST_RUNDOWN 0x04
253#define AIOCBLIST_CHECKSYNC 0x08
254
255/*
256 * AIO process info
257 */
258#define AIOP_FREE 0x1 /* proc on free queue */
259
260struct aiothreadlist {
261 int aiothreadflags; /* (c) AIO proc flags */
262 TAILQ_ENTRY(aiothreadlist) list; /* (c) list of processes */
263 struct thread *aiothread; /* (*) the AIO thread */
264};
265
266/*
267 * data-structure for lio signal management
268 */
269struct aioliojob {
270 int lioj_flags; /* (a) listio flags */
271 int lioj_count; /* (a) listio flags */
272 int lioj_finished_count; /* (a) listio flags */
273 struct sigevent lioj_signal; /* (a) signal on all I/O done */
274 TAILQ_ENTRY(aioliojob) lioj_list; /* (a) lio list */
275 struct knlist klist; /* (a) list of knotes */
276 ksiginfo_t lioj_ksi; /* (a) Realtime signal info */
277};
278
279#define LIOJ_SIGNAL 0x1 /* signal on all done (lio) */
280#define LIOJ_SIGNAL_POSTED 0x2 /* signal has been posted */
281#define LIOJ_KEVENT_POSTED 0x4 /* kevent triggered */
282
283/*
284 * per process aio data structure
285 */
286struct kaioinfo {
287 struct mtx kaio_mtx; /* the lock to protect this struct */
288 int kaio_flags; /* (a) per process kaio flags */
289 int kaio_maxactive_count; /* (*) maximum number of AIOs */
290 int kaio_active_count; /* (c) number of currently used AIOs */
291 int kaio_qallowed_count; /* (*) maxiumu size of AIO queue */
292 int kaio_count; /* (a) size of AIO queue */
293 int kaio_ballowed_count; /* (*) maximum number of buffers */
294 int kaio_buffer_count; /* (a) number of physio buffers */
295 TAILQ_HEAD(,aiocblist) kaio_all; /* (a) all AIOs in the process */
296 TAILQ_HEAD(,aiocblist) kaio_done; /* (a) done queue for process */
297 TAILQ_HEAD(,aioliojob) kaio_liojoblist; /* (a) list of lio jobs */
298 TAILQ_HEAD(,aiocblist) kaio_jobqueue; /* (a) job queue for process */
299 TAILQ_HEAD(,aiocblist) kaio_bufqueue; /* (a) buffer job queue for process */
300 TAILQ_HEAD(,aiocblist) kaio_sockqueue; /* (a) queue for aios waiting on sockets,
301 * NOT USED YET.
302 */
303 TAILQ_HEAD(,aiocblist) kaio_syncqueue; /* (a) queue for aio_fsync */
304 struct task kaio_task; /* (*) task to kick aio threads */
305};
306
307#define AIO_LOCK(ki) mtx_lock(&(ki)->kaio_mtx)
308#define AIO_UNLOCK(ki) mtx_unlock(&(ki)->kaio_mtx)
309#define AIO_LOCK_ASSERT(ki, f) mtx_assert(&(ki)->kaio_mtx, (f))
310#define AIO_MTX(ki) (&(ki)->kaio_mtx)
311
312#define KAIO_RUNDOWN 0x1 /* process is being run down */
313#define KAIO_WAKEUP 0x2 /* wakeup process when there is a significant event */
314
315/*
316 * Operations used to interact with userland aio control blocks.
317 * Different ABIs provide their own operations.
318 */
319struct aiocb_ops {
320 int (*copyin)(struct aiocb *ujob, struct aiocb *kjob);
321 long (*fetch_status)(struct aiocb *ujob);
322 long (*fetch_error)(struct aiocb *ujob);
323 int (*store_status)(struct aiocb *ujob, long status);
324 int (*store_error)(struct aiocb *ujob, long error);
325 int (*store_kernelinfo)(struct aiocb *ujob, long jobref);
326 int (*store_aiocb)(struct aiocb **ujobp, struct aiocb *ujob);
327};
328
329static TAILQ_HEAD(,aiothreadlist) aio_freeproc; /* (c) Idle daemons */
330static struct sema aio_newproc_sem;
331static struct mtx aio_job_mtx;
332static struct mtx aio_sock_mtx;
333static TAILQ_HEAD(,aiocblist) aio_jobs; /* (c) Async job list */
334static struct unrhdr *aiod_unr;
335
336void aio_init_aioinfo(struct proc *p);
337static void aio_onceonly(void);
338static int aio_free_entry(struct aiocblist *aiocbe);
339static void aio_process(struct aiocblist *aiocbe);
340static int aio_newproc(int *);
341int aio_aqueue(struct thread *td, struct aiocb *job,
342 struct aioliojob *lio, int type, struct aiocb_ops *ops);
343static void aio_physwakeup(struct buf *bp);
344static void aio_proc_rundown(void *arg, struct proc *p);
345static void aio_proc_rundown_exec(void *arg, struct proc *p, struct image_params *imgp);
346static int aio_qphysio(struct proc *p, struct aiocblist *iocb);
347static void biohelper(void *, int);
348static void aio_daemon(void *param);
349static void aio_swake_cb(struct socket *, struct sockbuf *);
350static int aio_unload(void);
351static void aio_bio_done_notify(struct proc *userp, struct aiocblist *aiocbe, int type);
352#define DONE_BUF 1
353#define DONE_QUEUE 2
354static int aio_kick(struct proc *userp);
355static void aio_kick_nowait(struct proc *userp);
356static void aio_kick_helper(void *context, int pending);
357static int filt_aioattach(struct knote *kn);
358static void filt_aiodetach(struct knote *kn);
359static int filt_aio(struct knote *kn, long hint);
360static int filt_lioattach(struct knote *kn);
361static void filt_liodetach(struct knote *kn);
362static int filt_lio(struct knote *kn, long hint);
363
364/*
365 * Zones for:
366 * kaio Per process async io info
367 * aiop async io thread data
368 * aiocb async io jobs
369 * aiol list io job pointer - internal to aio_suspend XXX
370 * aiolio list io jobs
371 */
372static uma_zone_t kaio_zone, aiop_zone, aiocb_zone, aiol_zone, aiolio_zone;
373
374/* kqueue filters for aio */
375static struct filterops aio_filtops =
376 { 0, filt_aioattach, filt_aiodetach, filt_aio };
377static struct filterops lio_filtops =
378 { 0, filt_lioattach, filt_liodetach, filt_lio };
379
380static eventhandler_tag exit_tag, exec_tag;
381
382TASKQUEUE_DEFINE_THREAD(aiod_bio);
383
384/*
385 * Main operations function for use as a kernel module.
386 */
387static int
388aio_modload(struct module *module, int cmd, void *arg)
389{
390 int error = 0;
391
392 switch (cmd) {
393 case MOD_LOAD:
394 aio_onceonly();
395 break;
396 case MOD_UNLOAD:
397 error = aio_unload();
398 break;
399 case MOD_SHUTDOWN:
400 break;
401 default:
402 error = EINVAL;
403 break;
404 }
405 return (error);
406}
407
408static moduledata_t aio_mod = {
409 "aio",
410 &aio_modload,
411 NULL
412};
413
414SYSCALL_MODULE_HELPER(aio_cancel);
415SYSCALL_MODULE_HELPER(aio_error);
416SYSCALL_MODULE_HELPER(aio_fsync);
417SYSCALL_MODULE_HELPER(aio_read);
418SYSCALL_MODULE_HELPER(aio_return);
419SYSCALL_MODULE_HELPER(aio_suspend);
420SYSCALL_MODULE_HELPER(aio_waitcomplete);
421SYSCALL_MODULE_HELPER(aio_write);
422SYSCALL_MODULE_HELPER(lio_listio);
423SYSCALL_MODULE_HELPER(oaio_read);
424SYSCALL_MODULE_HELPER(oaio_write);
425SYSCALL_MODULE_HELPER(olio_listio);
426
427DECLARE_MODULE(aio, aio_mod,
428 SI_SUB_VFS, SI_ORDER_ANY);
429MODULE_VERSION(aio, 1);
430
431/*
432 * Startup initialization
433 */
434static void
435aio_onceonly(void)
436{
437
438 /* XXX: should probably just use so->callback */
439 aio_swake = &aio_swake_cb;
440 exit_tag = EVENTHANDLER_REGISTER(process_exit, aio_proc_rundown, NULL,
441 EVENTHANDLER_PRI_ANY);
442 exec_tag = EVENTHANDLER_REGISTER(process_exec, aio_proc_rundown_exec, NULL,
443 EVENTHANDLER_PRI_ANY);
444 kqueue_add_filteropts(EVFILT_AIO, &aio_filtops);
445 kqueue_add_filteropts(EVFILT_LIO, &lio_filtops);
446 TAILQ_INIT(&aio_freeproc);
447 sema_init(&aio_newproc_sem, 0, "aio_new_proc");
448 mtx_init(&aio_job_mtx, "aio_job", NULL, MTX_DEF);
449 mtx_init(&aio_sock_mtx, "aio_sock", NULL, MTX_DEF);
450 TAILQ_INIT(&aio_jobs);
451 aiod_unr = new_unrhdr(1, INT_MAX, NULL);
452 kaio_zone = uma_zcreate("AIO", sizeof(struct kaioinfo), NULL, NULL,
453 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
454 aiop_zone = uma_zcreate("AIOP", sizeof(struct aiothreadlist), NULL,
455 NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
456 aiocb_zone = uma_zcreate("AIOCB", sizeof(struct aiocblist), NULL, NULL,
457 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
458 aiol_zone = uma_zcreate("AIOL", AIO_LISTIO_MAX*sizeof(intptr_t) , NULL,
459 NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
460 aiolio_zone = uma_zcreate("AIOLIO", sizeof(struct aioliojob), NULL,
461 NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
462 aiod_timeout = AIOD_TIMEOUT_DEFAULT;
463 aiod_lifetime = AIOD_LIFETIME_DEFAULT;
464 jobrefid = 1;
465 async_io_version = _POSIX_VERSION;
466 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, AIO_LISTIO_MAX);
467 p31b_setcfg(CTL_P1003_1B_AIO_MAX, MAX_AIO_QUEUE);
468 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, 0);
469}
470
471/*
472 * Callback for unload of AIO when used as a module.
473 */
474static int
475aio_unload(void)
476{
477 int error;
478
479 /*
480 * XXX: no unloads by default, it's too dangerous.
481 * perhaps we could do it if locked out callers and then
482 * did an aio_proc_rundown() on each process.
483 *
484 * jhb: aio_proc_rundown() needs to run on curproc though,
485 * so I don't think that would fly.
486 */
487 if (!unloadable)
488 return (EOPNOTSUPP);
489
490 error = kqueue_del_filteropts(EVFILT_AIO);
491 if (error)
492 return error;
493 error = kqueue_del_filteropts(EVFILT_LIO);
494 if (error)
495 return error;
496 async_io_version = 0;
497 aio_swake = NULL;
498 taskqueue_free(taskqueue_aiod_bio);
499 delete_unrhdr(aiod_unr);
500 uma_zdestroy(kaio_zone);
501 uma_zdestroy(aiop_zone);
502 uma_zdestroy(aiocb_zone);
503 uma_zdestroy(aiol_zone);
504 uma_zdestroy(aiolio_zone);
505 EVENTHANDLER_DEREGISTER(process_exit, exit_tag);
506 EVENTHANDLER_DEREGISTER(process_exec, exec_tag);
507 mtx_destroy(&aio_job_mtx);
508 mtx_destroy(&aio_sock_mtx);
509 sema_destroy(&aio_newproc_sem);
510 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1);
511 p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1);
512 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1);
513 return (0);
514}
515
516/*
517 * Init the per-process aioinfo structure. The aioinfo limits are set
518 * per-process for user limit (resource) management.
519 */
520void
521aio_init_aioinfo(struct proc *p)
522{
523 struct kaioinfo *ki;
524
525 ki = uma_zalloc(kaio_zone, M_WAITOK);
526 mtx_init(&ki->kaio_mtx, "aiomtx", NULL, MTX_DEF);
527 ki->kaio_flags = 0;
528 ki->kaio_maxactive_count = max_aio_per_proc;
529 ki->kaio_active_count = 0;
530 ki->kaio_qallowed_count = max_aio_queue_per_proc;
531 ki->kaio_count = 0;
532 ki->kaio_ballowed_count = max_buf_aio;
533 ki->kaio_buffer_count = 0;
534 TAILQ_INIT(&ki->kaio_all);
535 TAILQ_INIT(&ki->kaio_done);
536 TAILQ_INIT(&ki->kaio_jobqueue);
537 TAILQ_INIT(&ki->kaio_bufqueue);
538 TAILQ_INIT(&ki->kaio_liojoblist);
539 TAILQ_INIT(&ki->kaio_sockqueue);
540 TAILQ_INIT(&ki->kaio_syncqueue);
541 TASK_INIT(&ki->kaio_task, 0, aio_kick_helper, p);
542 PROC_LOCK(p);
543 if (p->p_aioinfo == NULL) {
544 p->p_aioinfo = ki;
545 PROC_UNLOCK(p);
546 } else {
547 PROC_UNLOCK(p);
548 mtx_destroy(&ki->kaio_mtx);
549 uma_zfree(kaio_zone, ki);
550 }
551
552 while (num_aio_procs < MIN(target_aio_procs, max_aio_procs))
553 aio_newproc(NULL);
554}
555
556static int
557aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi)
558{
559 int ret = 0;
560
561 PROC_LOCK(p);
562 if (!KSI_ONQ(ksi)) {
563 ksi->ksi_code = SI_ASYNCIO;
564 ksi->ksi_flags |= KSI_EXT | KSI_INS;
565 ret = psignal_event(p, sigev, ksi);
566 }
567 PROC_UNLOCK(p);
568 return (ret);
569}
570
571/*
572 * Free a job entry. Wait for completion if it is currently active, but don't
573 * delay forever. If we delay, we return a flag that says that we have to
574 * restart the queue scan.
575 */
576static int
577aio_free_entry(struct aiocblist *aiocbe)
578{
579 struct kaioinfo *ki;
580 struct aioliojob *lj;
581 struct proc *p;
582
583 p = aiocbe->userproc;
584 MPASS(curproc == p);
585 ki = p->p_aioinfo;
586 MPASS(ki != NULL);
587
588 AIO_LOCK_ASSERT(ki, MA_OWNED);
589 MPASS(aiocbe->jobstate == JOBST_JOBFINISHED);
590
591 atomic_subtract_int(&num_queue_count, 1);
592
593 ki->kaio_count--;
594 MPASS(ki->kaio_count >= 0);
595
596 TAILQ_REMOVE(&ki->kaio_done, aiocbe, plist);
597 TAILQ_REMOVE(&ki->kaio_all, aiocbe, allist);
598
599 lj = aiocbe->lio;
600 if (lj) {
601 lj->lioj_count--;
602 lj->lioj_finished_count--;
603
604 if (lj->lioj_count == 0) {
605 TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
606 /* lio is going away, we need to destroy any knotes */
607 knlist_delete(&lj->klist, curthread, 1);
608 PROC_LOCK(p);
609 sigqueue_take(&lj->lioj_ksi);
610 PROC_UNLOCK(p);
611 uma_zfree(aiolio_zone, lj);
612 }
613 }
614
615 /* aiocbe is going away, we need to destroy any knotes */
616 knlist_delete(&aiocbe->klist, curthread, 1);
617 PROC_LOCK(p);
618 sigqueue_take(&aiocbe->ksi);
619 PROC_UNLOCK(p);
620
621 MPASS(aiocbe->bp == NULL);
622 aiocbe->jobstate = JOBST_NULL;
623 AIO_UNLOCK(ki);
624
625 /*
626 * The thread argument here is used to find the owning process
627 * and is also passed to fo_close() which may pass it to various
628 * places such as devsw close() routines. Because of that, we
629 * need a thread pointer from the process owning the job that is
630 * persistent and won't disappear out from under us or move to
631 * another process.
632 *
633 * Currently, all the callers of this function call it to remove
634 * an aiocblist from the current process' job list either via a
635 * syscall or due to the current process calling exit() or
636 * execve(). Thus, we know that p == curproc. We also know that
637 * curthread can't exit since we are curthread.
638 *
639 * Therefore, we use curthread as the thread to pass to
640 * knlist_delete(). This does mean that it is possible for the
641 * thread pointer at close time to differ from the thread pointer
642 * at open time, but this is already true of file descriptors in
643 * a multithreaded process.
644 */
645 fdrop(aiocbe->fd_file, curthread);
646 crfree(aiocbe->cred);
647 uma_zfree(aiocb_zone, aiocbe);
648 AIO_LOCK(ki);
649
650 return (0);
651}
652
653static void
654aio_proc_rundown_exec(void *arg, struct proc *p, struct image_params *imgp __unused)
655{
656 aio_proc_rundown(arg, p);
657}
658
659/*
660 * Rundown the jobs for a given process.
661 */
662static void
663aio_proc_rundown(void *arg, struct proc *p)
664{
665 struct kaioinfo *ki;
666 struct aioliojob *lj;
667 struct aiocblist *cbe, *cbn;
668 struct file *fp;
669 struct socket *so;
670 int remove;
671
672 KASSERT(curthread->td_proc == p,
673 ("%s: called on non-curproc", __func__));
674 ki = p->p_aioinfo;
675 if (ki == NULL)
676 return;
677
678 AIO_LOCK(ki);
679 ki->kaio_flags |= KAIO_RUNDOWN;
680
681restart:
682
683 /*
684 * Try to cancel all pending requests. This code simulates
685 * aio_cancel on all pending I/O requests.
686 */
687 TAILQ_FOREACH_SAFE(cbe, &ki->kaio_jobqueue, plist, cbn) {
688 remove = 0;
689 mtx_lock(&aio_job_mtx);
690 if (cbe->jobstate == JOBST_JOBQGLOBAL) {
691 TAILQ_REMOVE(&aio_jobs, cbe, list);
692 remove = 1;
693 } else if (cbe->jobstate == JOBST_JOBQSOCK) {
694 fp = cbe->fd_file;
695 MPASS(fp->f_type == DTYPE_SOCKET);
696 so = fp->f_data;
697 TAILQ_REMOVE(&so->so_aiojobq, cbe, list);
698 remove = 1;
699 } else if (cbe->jobstate == JOBST_JOBQSYNC) {
700 TAILQ_REMOVE(&ki->kaio_syncqueue, cbe, list);
701 remove = 1;
702 }
703 mtx_unlock(&aio_job_mtx);
704
705 if (remove) {
706 cbe->jobstate = JOBST_JOBFINISHED;
707 cbe->uaiocb._aiocb_private.status = -1;
708 cbe->uaiocb._aiocb_private.error = ECANCELED;
709 TAILQ_REMOVE(&ki->kaio_jobqueue, cbe, plist);
710 aio_bio_done_notify(p, cbe, DONE_QUEUE);
711 }
712 }
713
714 /* Wait for all running I/O to be finished */
715 if (TAILQ_FIRST(&ki->kaio_bufqueue) ||
716 TAILQ_FIRST(&ki->kaio_jobqueue)) {
717 ki->kaio_flags |= KAIO_WAKEUP;
718 msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO, "aioprn", hz);
719 goto restart;
720 }
721
722 /* Free all completed I/O requests. */
723 while ((cbe = TAILQ_FIRST(&ki->kaio_done)) != NULL)
724 aio_free_entry(cbe);
725
726 while ((lj = TAILQ_FIRST(&ki->kaio_liojoblist)) != NULL) {
727 if (lj->lioj_count == 0) {
728 TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
729 knlist_delete(&lj->klist, curthread, 1);
730 PROC_LOCK(p);
731 sigqueue_take(&lj->lioj_ksi);
732 PROC_UNLOCK(p);
733 uma_zfree(aiolio_zone, lj);
734 } else {
735 panic("LIO job not cleaned up: C:%d, FC:%d\n",
736 lj->lioj_count, lj->lioj_finished_count);
737 }
738 }
739 AIO_UNLOCK(ki);
740 taskqueue_drain(taskqueue_aiod_bio, &ki->kaio_task);
741 mtx_destroy(&ki->kaio_mtx);
742 uma_zfree(kaio_zone, ki);
743 p->p_aioinfo = NULL;
744}
745
746/*
747 * Select a job to run (called by an AIO daemon).
748 */
749static struct aiocblist *
750aio_selectjob(struct aiothreadlist *aiop)
751{
752 struct aiocblist *aiocbe;
753 struct kaioinfo *ki;
754 struct proc *userp;
755
756 mtx_assert(&aio_job_mtx, MA_OWNED);
757 TAILQ_FOREACH(aiocbe, &aio_jobs, list) {
758 userp = aiocbe->userproc;
759 ki = userp->p_aioinfo;
760
761 if (ki->kaio_active_count < ki->kaio_maxactive_count) {
762 TAILQ_REMOVE(&aio_jobs, aiocbe, list);
763 /* Account for currently active jobs. */
764 ki->kaio_active_count++;
765 aiocbe->jobstate = JOBST_JOBRUNNING;
766 break;
767 }
768 }
769 return (aiocbe);
770}
771
772/*
773 * Move all data to a permanent storage device, this code
774 * simulates fsync syscall.
775 */
776static int
777aio_fsync_vnode(struct thread *td, struct vnode *vp)
778{
779 struct mount *mp;
780 int vfslocked;
781 int error;
782
783 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
784 if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
785 goto drop;
786 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
787 if (vp->v_object != NULL) {
788 VM_OBJECT_LOCK(vp->v_object);
789 vm_object_page_clean(vp->v_object, 0, 0, 0);
790 VM_OBJECT_UNLOCK(vp->v_object);
791 }
792 error = VOP_FSYNC(vp, MNT_WAIT, td);
793
794 VOP_UNLOCK(vp, 0);
795 vn_finished_write(mp);
796drop:
797 VFS_UNLOCK_GIANT(vfslocked);
798 return (error);
799}
800
801/*
802 * The AIO processing activity. This is the code that does the I/O request for
803 * the non-physio version of the operations. The normal vn operations are used,
804 * and this code should work in all instances for every type of file, including
805 * pipes, sockets, fifos, and regular files.
806 *
807 * XXX I don't think it works well for socket, pipe, and fifo.
808 */
809static void
810aio_process(struct aiocblist *aiocbe)
811{
812 struct ucred *td_savedcred;
813 struct thread *td;
814 struct aiocb *cb;
815 struct file *fp;
816 struct socket *so;
817 struct uio auio;
818 struct iovec aiov;
819 int cnt;
820 int error;
821 int oublock_st, oublock_end;
822 int inblock_st, inblock_end;
823
824 td = curthread;
825 td_savedcred = td->td_ucred;
826 td->td_ucred = aiocbe->cred;
827 cb = &aiocbe->uaiocb;
828 fp = aiocbe->fd_file;
829
830 if (cb->aio_lio_opcode == LIO_SYNC) {
831 error = 0;
832 cnt = 0;
833 if (fp->f_vnode != NULL)
834 error = aio_fsync_vnode(td, fp->f_vnode);
835 cb->_aiocb_private.error = error;
836 cb->_aiocb_private.status = 0;
837 td->td_ucred = td_savedcred;
838 return;
839 }
840
841 aiov.iov_base = (void *)(uintptr_t)cb->aio_buf;
842 aiov.iov_len = cb->aio_nbytes;
843
844 auio.uio_iov = &aiov;
845 auio.uio_iovcnt = 1;
846 auio.uio_offset = cb->aio_offset;
847 auio.uio_resid = cb->aio_nbytes;
848 cnt = cb->aio_nbytes;
849 auio.uio_segflg = UIO_USERSPACE;
850 auio.uio_td = td;
851
852 inblock_st = td->td_ru.ru_inblock;
853 oublock_st = td->td_ru.ru_oublock;
854 /*
855 * aio_aqueue() acquires a reference to the file that is
856 * released in aio_free_entry().
857 */
858 if (cb->aio_lio_opcode == LIO_READ) {
859 auio.uio_rw = UIO_READ;
860 if (auio.uio_resid == 0)
861 error = 0;
862 else
863 error = fo_read(fp, &auio, fp->f_cred, FOF_OFFSET, td);
864 } else {
865 if (fp->f_type == DTYPE_VNODE)
866 bwillwrite();
867 auio.uio_rw = UIO_WRITE;
868 error = fo_write(fp, &auio, fp->f_cred, FOF_OFFSET, td);
869 }
870 inblock_end = td->td_ru.ru_inblock;
871 oublock_end = td->td_ru.ru_oublock;
872
873 aiocbe->inputcharge = inblock_end - inblock_st;
874 aiocbe->outputcharge = oublock_end - oublock_st;
875
876 if ((error) && (auio.uio_resid != cnt)) {
877 if (error == ERESTART || error == EINTR || error == EWOULDBLOCK)
878 error = 0;
879 if ((error == EPIPE) && (cb->aio_lio_opcode == LIO_WRITE)) {
880 int sigpipe = 1;
881 if (fp->f_type == DTYPE_SOCKET) {
882 so = fp->f_data;
883 if (so->so_options & SO_NOSIGPIPE)
884 sigpipe = 0;
885 }
886 if (sigpipe) {
887 PROC_LOCK(aiocbe->userproc);
888 psignal(aiocbe->userproc, SIGPIPE);
889 PROC_UNLOCK(aiocbe->userproc);
890 }
891 }
892 }
893
894 cnt -= auio.uio_resid;
895 cb->_aiocb_private.error = error;
896 cb->_aiocb_private.status = cnt;
897 td->td_ucred = td_savedcred;
898}
899
900static void
901aio_bio_done_notify(struct proc *userp, struct aiocblist *aiocbe, int type)
902{
903 struct aioliojob *lj;
904 struct kaioinfo *ki;
905 struct aiocblist *scb, *scbn;
906 int lj_done;
907
908 ki = userp->p_aioinfo;
909 AIO_LOCK_ASSERT(ki, MA_OWNED);
910 lj = aiocbe->lio;
911 lj_done = 0;
912 if (lj) {
913 lj->lioj_finished_count++;
914 if (lj->lioj_count == lj->lioj_finished_count)
915 lj_done = 1;
916 }
917 if (type == DONE_QUEUE) {
918 aiocbe->jobflags |= AIOCBLIST_DONE;
919 } else {
920 aiocbe->jobflags |= AIOCBLIST_BUFDONE;
921 }
922 TAILQ_INSERT_TAIL(&ki->kaio_done, aiocbe, plist);
923 aiocbe->jobstate = JOBST_JOBFINISHED;
924
925 if (ki->kaio_flags & KAIO_RUNDOWN)
926 goto notification_done;
927
928 if (aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL ||
929 aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID)
930 aio_sendsig(userp, &aiocbe->uaiocb.aio_sigevent, &aiocbe->ksi);
931
932 KNOTE_LOCKED(&aiocbe->klist, 1);
933
934 if (lj_done) {
935 if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
936 lj->lioj_flags |= LIOJ_KEVENT_POSTED;
937 KNOTE_LOCKED(&lj->klist, 1);
938 }
939 if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED))
940 == LIOJ_SIGNAL
941 && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
942 lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) {
943 aio_sendsig(userp, &lj->lioj_signal, &lj->lioj_ksi);
944 lj->lioj_flags |= LIOJ_SIGNAL_POSTED;
945 }
946 }
947
948notification_done:
949 if (aiocbe->jobflags & AIOCBLIST_CHECKSYNC) {
950 TAILQ_FOREACH_SAFE(scb, &ki->kaio_syncqueue, list, scbn) {
951 if (aiocbe->fd_file == scb->fd_file &&
952 aiocbe->seqno < scb->seqno) {
953 if (--scb->pending == 0) {
954 mtx_lock(&aio_job_mtx);
955 scb->jobstate = JOBST_JOBQGLOBAL;
956 TAILQ_REMOVE(&ki->kaio_syncqueue, scb, list);
957 TAILQ_INSERT_TAIL(&aio_jobs, scb, list);
958 aio_kick_nowait(userp);
959 mtx_unlock(&aio_job_mtx);
960 }
961 }
962 }
963 }
964 if (ki->kaio_flags & KAIO_WAKEUP) {
965 ki->kaio_flags &= ~KAIO_WAKEUP;
966 wakeup(&userp->p_aioinfo);
967 }
968}
969
970/*
971 * The AIO daemon, most of the actual work is done in aio_process,
972 * but the setup (and address space mgmt) is done in this routine.
973 */
974static void
975aio_daemon(void *_id)
976{
977 struct aiocblist *aiocbe;
978 struct aiothreadlist *aiop;
979 struct kaioinfo *ki;
980 struct proc *curcp, *mycp, *userp;
981 struct vmspace *myvm, *tmpvm;
982 struct thread *td = curthread;
983 int id = (intptr_t)_id;
984
985 /*
986 * Local copies of curproc (cp) and vmspace (myvm)
987 */
988 mycp = td->td_proc;
989 myvm = mycp->p_vmspace;
990
991 KASSERT(mycp->p_textvp == NULL, ("kthread has a textvp"));
992
993 /*
994 * Allocate and ready the aio control info. There is one aiop structure
995 * per daemon.
996 */
997 aiop = uma_zalloc(aiop_zone, M_WAITOK);
998 aiop->aiothread = td;
999 aiop->aiothreadflags = 0;
1000
1001 /* The daemon resides in its own pgrp. */
1002 setsid(td, NULL);
1003
1004 /*
1005 * Wakeup parent process. (Parent sleeps to keep from blasting away
1006 * and creating too many daemons.)
1007 */
1008 sema_post(&aio_newproc_sem);
1009
1010 mtx_lock(&aio_job_mtx);
1011 for (;;) {
1012 /*
1013 * curcp is the current daemon process context.
1014 * userp is the current user process context.
1015 */
1016 curcp = mycp;
1017
1018 /*
1019 * Take daemon off of free queue
1020 */
1021 if (aiop->aiothreadflags & AIOP_FREE) {
1022 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1023 aiop->aiothreadflags &= ~AIOP_FREE;
1024 }
1025
1026 /*
1027 * Check for jobs.
1028 */
1029 while ((aiocbe = aio_selectjob(aiop)) != NULL) {
1030 mtx_unlock(&aio_job_mtx);
1031 userp = aiocbe->userproc;
1032
1033 /*
1034 * Connect to process address space for user program.
1035 */
1036 if (userp != curcp) {
1037 /*
1038 * Save the current address space that we are
1039 * connected to.
1040 */
1041 tmpvm = mycp->p_vmspace;
1042
1043 /*
1044 * Point to the new user address space, and
1045 * refer to it.
1046 */
1047 mycp->p_vmspace = userp->p_vmspace;
1048 atomic_add_int(&mycp->p_vmspace->vm_refcnt, 1);
1049
1050 /* Activate the new mapping. */
1051 pmap_activate(FIRST_THREAD_IN_PROC(mycp));
1052
1053 /*
1054 * If the old address space wasn't the daemons
1055 * own address space, then we need to remove the
1056 * daemon's reference from the other process
1057 * that it was acting on behalf of.
1058 */
1059 if (tmpvm != myvm) {
1060 vmspace_free(tmpvm);
1061 }
1062 curcp = userp;
1063 }
1064
1065 ki = userp->p_aioinfo;
1066
1067 /* Do the I/O function. */
1068 aio_process(aiocbe);
1069
1070 mtx_lock(&aio_job_mtx);
1071 /* Decrement the active job count. */
1072 ki->kaio_active_count--;
1073 mtx_unlock(&aio_job_mtx);
1074
1075 AIO_LOCK(ki);
1076 TAILQ_REMOVE(&ki->kaio_jobqueue, aiocbe, plist);
1077 aio_bio_done_notify(userp, aiocbe, DONE_QUEUE);
1078 AIO_UNLOCK(ki);
1079
1080 mtx_lock(&aio_job_mtx);
1081 }
1082
1083 /*
1084 * Disconnect from user address space.
1085 */
1086 if (curcp != mycp) {
1087
1088 mtx_unlock(&aio_job_mtx);
1089
1090 /* Get the user address space to disconnect from. */
1091 tmpvm = mycp->p_vmspace;
1092
1093 /* Get original address space for daemon. */
1094 mycp->p_vmspace = myvm;
1095
1096 /* Activate the daemon's address space. */
1097 pmap_activate(FIRST_THREAD_IN_PROC(mycp));
1098#ifdef DIAGNOSTIC
1099 if (tmpvm == myvm) {
1100 printf("AIOD: vmspace problem -- %d\n",
1101 mycp->p_pid);
1102 }
1103#endif
1104 /* Remove our vmspace reference. */
1105 vmspace_free(tmpvm);
1106
1107 curcp = mycp;
1108
1109 mtx_lock(&aio_job_mtx);
1110 /*
1111 * We have to restart to avoid race, we only sleep if
1112 * no job can be selected, that should be
1113 * curcp == mycp.
1114 */
1115 continue;
1116 }
1117
1118 mtx_assert(&aio_job_mtx, MA_OWNED);
1119
1120 TAILQ_INSERT_HEAD(&aio_freeproc, aiop, list);
1121 aiop->aiothreadflags |= AIOP_FREE;
1122
1123 /*
1124 * If daemon is inactive for a long time, allow it to exit,
1125 * thereby freeing resources.
1126 */
1127 if (msleep(aiop->aiothread, &aio_job_mtx, PRIBIO, "aiordy",
1128 aiod_lifetime)) {
1129 if (TAILQ_EMPTY(&aio_jobs)) {
1130 if ((aiop->aiothreadflags & AIOP_FREE) &&
1131 (num_aio_procs > target_aio_procs)) {
1132 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1133 num_aio_procs--;
1134 mtx_unlock(&aio_job_mtx);
1135 uma_zfree(aiop_zone, aiop);
1136 free_unr(aiod_unr, id);
1137#ifdef DIAGNOSTIC
1138 if (mycp->p_vmspace->vm_refcnt <= 1) {
1139 printf("AIOD: bad vm refcnt for"
1140 " exiting daemon: %d\n",
1141 mycp->p_vmspace->vm_refcnt);
1142 }
1143#endif
1144 kproc_exit(0);
1145 }
1146 }
1147 }
1148 }
1149 mtx_unlock(&aio_job_mtx);
1150 panic("shouldn't be here\n");
1151}
1152
1153/*
1154 * Create a new AIO daemon. This is mostly a kernel-thread fork routine. The
1155 * AIO daemon modifies its environment itself.
1156 */
1157static int
1158aio_newproc(int *start)
1159{
1160 int error;
1161 struct proc *p;
1162 int id;
1163
1164 id = alloc_unr(aiod_unr);
1165 error = kproc_create(aio_daemon, (void *)(intptr_t)id, &p,
1166 RFNOWAIT, 0, "aiod%d", id);
1167 if (error == 0) {
1168 /*
1169 * Wait until daemon is started.
1170 */
1171 sema_wait(&aio_newproc_sem);
1172 mtx_lock(&aio_job_mtx);
1173 num_aio_procs++;
1174 if (start != NULL)
1175 (*start)--;
1176 mtx_unlock(&aio_job_mtx);
1177 } else {
1178 free_unr(aiod_unr, id);
1179 }
1180 return (error);
1181}
1182
1183/*
1184 * Try the high-performance, low-overhead physio method for eligible
1185 * VCHR devices. This method doesn't use an aio helper thread, and
1186 * thus has very low overhead.
1187 *
1188 * Assumes that the caller, aio_aqueue(), has incremented the file
1189 * structure's reference count, preventing its deallocation for the
1190 * duration of this call.
1191 */
1192static int
1193aio_qphysio(struct proc *p, struct aiocblist *aiocbe)
1194{
1195 struct aiocb *cb;
1196 struct file *fp;
1197 struct buf *bp;
1198 struct vnode *vp;
1199 struct kaioinfo *ki;
1200 struct aioliojob *lj;
1201 int error;
1202
1203 cb = &aiocbe->uaiocb;
1204 fp = aiocbe->fd_file;
1205
1206 if (fp->f_type != DTYPE_VNODE)
1207 return (-1);
1208
1209 vp = fp->f_vnode;
1210
1211 /*
1212 * If its not a disk, we don't want to return a positive error.
1213 * It causes the aio code to not fall through to try the thread
1214 * way when you're talking to a regular file.
1215 */
1216 if (!vn_isdisk(vp, &error)) {
1217 if (error == ENOTBLK)
1218 return (-1);
1219 else
1220 return (error);
1221 }
1222
1223 if (vp->v_bufobj.bo_bsize == 0)
1224 return (-1);
1225
1226 if (cb->aio_nbytes % vp->v_bufobj.bo_bsize)
1227 return (-1);
1228
1229 if (cb->aio_nbytes > vp->v_rdev->si_iosize_max)
1230 return (-1);
1231
1232 if (cb->aio_nbytes >
1233 MAXPHYS - (((vm_offset_t) cb->aio_buf) & PAGE_MASK))
1234 return (-1);
1235
1236 ki = p->p_aioinfo;
1237 if (ki->kaio_buffer_count >= ki->kaio_ballowed_count)
1238 return (-1);
1239
1240 /* Create and build a buffer header for a transfer. */
1241 bp = (struct buf *)getpbuf(NULL);
1242 BUF_KERNPROC(bp);
1243
1244 AIO_LOCK(ki);
1245 ki->kaio_count++;
1246 ki->kaio_buffer_count++;
1247 lj = aiocbe->lio;
1248 if (lj)
1249 lj->lioj_count++;
1250 AIO_UNLOCK(ki);
1251
1252 /*
1253 * Get a copy of the kva from the physical buffer.
1254 */
1255 error = 0;
1256
1257 bp->b_bcount = cb->aio_nbytes;
1258 bp->b_bufsize = cb->aio_nbytes;
1259 bp->b_iodone = aio_physwakeup;
1260 bp->b_saveaddr = bp->b_data;
1261 bp->b_data = (void *)(uintptr_t)cb->aio_buf;
1262 bp->b_offset = cb->aio_offset;
1263 bp->b_iooffset = cb->aio_offset;
1264 bp->b_blkno = btodb(cb->aio_offset);
1265 bp->b_iocmd = cb->aio_lio_opcode == LIO_WRITE ? BIO_WRITE : BIO_READ;
1266
1267 /*
1268 * Bring buffer into kernel space.
1269 */
1270 if (vmapbuf(bp) < 0) {
1271 error = EFAULT;
1272 goto doerror;
1273 }
1274
1275 AIO_LOCK(ki);
1276 aiocbe->bp = bp;
1277 bp->b_caller1 = (void *)aiocbe;
1278 TAILQ_INSERT_TAIL(&ki->kaio_bufqueue, aiocbe, plist);
1279 TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist);
1280 aiocbe->jobstate = JOBST_JOBQBUF;
1281 cb->_aiocb_private.status = cb->aio_nbytes;
1282 AIO_UNLOCK(ki);
1283
1284 atomic_add_int(&num_queue_count, 1);
1285 atomic_add_int(&num_buf_aio, 1);
1286
1287 bp->b_error = 0;
1288
1289 TASK_INIT(&aiocbe->biotask, 0, biohelper, aiocbe);
1290
1291 /* Perform transfer. */
1292 dev_strategy(vp->v_rdev, bp);
1293 return (0);
1294
1295doerror:
1296 AIO_LOCK(ki);
1297 ki->kaio_count--;
1298 ki->kaio_buffer_count--;
1299 if (lj)
1300 lj->lioj_count--;
1301 aiocbe->bp = NULL;
1302 AIO_UNLOCK(ki);
1303 relpbuf(bp, NULL);
1304 return (error);
1305}
1306
1307/*
1308 * Wake up aio requests that may be serviceable now.
1309 */
1310static void
1311aio_swake_cb(struct socket *so, struct sockbuf *sb)
1312{
1313 struct aiocblist *cb, *cbn;
1314 int opcode;
1315
| 23
24#include "opt_compat.h"
25
26#include <sys/param.h>
27#include <sys/systm.h>
28#include <sys/malloc.h>
29#include <sys/bio.h>
30#include <sys/buf.h>
31#include <sys/eventhandler.h>
32#include <sys/sysproto.h>
33#include <sys/filedesc.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36#include <sys/kthread.h>
37#include <sys/fcntl.h>
38#include <sys/file.h>
39#include <sys/limits.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42#include <sys/unistd.h>
43#include <sys/posix4.h>
44#include <sys/proc.h>
45#include <sys/resourcevar.h>
46#include <sys/signalvar.h>
47#include <sys/protosw.h>
48#include <sys/sema.h>
49#include <sys/socket.h>
50#include <sys/socketvar.h>
51#include <sys/syscall.h>
52#include <sys/sysent.h>
53#include <sys/sysctl.h>
54#include <sys/sx.h>
55#include <sys/taskqueue.h>
56#include <sys/vnode.h>
57#include <sys/conf.h>
58#include <sys/event.h>
59#include <sys/mount.h>
60
61#include <machine/atomic.h>
62
63#include <vm/vm.h>
64#include <vm/vm_extern.h>
65#include <vm/pmap.h>
66#include <vm/vm_map.h>
67#include <vm/vm_object.h>
68#include <vm/uma.h>
69#include <sys/aio.h>
70
71#include "opt_vfs_aio.h"
72
73/*
74 * Counter for allocating reference ids to new jobs. Wrapped to 1 on
75 * overflow. (XXX will be removed soon.)
76 */
77static u_long jobrefid;
78
79/*
80 * Counter for aio_fsync.
81 */
82static uint64_t jobseqno;
83
84#define JOBST_NULL 0
85#define JOBST_JOBQSOCK 1
86#define JOBST_JOBQGLOBAL 2
87#define JOBST_JOBRUNNING 3
88#define JOBST_JOBFINISHED 4
89#define JOBST_JOBQBUF 5
90#define JOBST_JOBQSYNC 6
91
92#ifndef MAX_AIO_PER_PROC
93#define MAX_AIO_PER_PROC 32
94#endif
95
96#ifndef MAX_AIO_QUEUE_PER_PROC
97#define MAX_AIO_QUEUE_PER_PROC 256 /* Bigger than AIO_LISTIO_MAX */
98#endif
99
100#ifndef MAX_AIO_PROCS
101#define MAX_AIO_PROCS 32
102#endif
103
104#ifndef MAX_AIO_QUEUE
105#define MAX_AIO_QUEUE 1024 /* Bigger than AIO_LISTIO_MAX */
106#endif
107
108#ifndef TARGET_AIO_PROCS
109#define TARGET_AIO_PROCS 4
110#endif
111
112#ifndef MAX_BUF_AIO
113#define MAX_BUF_AIO 16
114#endif
115
116#ifndef AIOD_TIMEOUT_DEFAULT
117#define AIOD_TIMEOUT_DEFAULT (10 * hz)
118#endif
119
120#ifndef AIOD_LIFETIME_DEFAULT
121#define AIOD_LIFETIME_DEFAULT (30 * hz)
122#endif
123
124FEATURE(aio, "Asynchronous I/O");
125
126static MALLOC_DEFINE(M_LIO, "lio", "listio aio control block list");
127
128static SYSCTL_NODE(_vfs, OID_AUTO, aio, CTLFLAG_RW, 0, "Async IO management");
129
130static int max_aio_procs = MAX_AIO_PROCS;
131SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_procs,
132 CTLFLAG_RW, &max_aio_procs, 0,
133 "Maximum number of kernel threads to use for handling async IO ");
134
135static int num_aio_procs = 0;
136SYSCTL_INT(_vfs_aio, OID_AUTO, num_aio_procs,
137 CTLFLAG_RD, &num_aio_procs, 0,
138 "Number of presently active kernel threads for async IO");
139
140/*
141 * The code will adjust the actual number of AIO processes towards this
142 * number when it gets a chance.
143 */
144static int target_aio_procs = TARGET_AIO_PROCS;
145SYSCTL_INT(_vfs_aio, OID_AUTO, target_aio_procs, CTLFLAG_RW, &target_aio_procs,
146 0, "Preferred number of ready kernel threads for async IO");
147
148static int max_queue_count = MAX_AIO_QUEUE;
149SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue, CTLFLAG_RW, &max_queue_count, 0,
150 "Maximum number of aio requests to queue, globally");
151
152static int num_queue_count = 0;
153SYSCTL_INT(_vfs_aio, OID_AUTO, num_queue_count, CTLFLAG_RD, &num_queue_count, 0,
154 "Number of queued aio requests");
155
156static int num_buf_aio = 0;
157SYSCTL_INT(_vfs_aio, OID_AUTO, num_buf_aio, CTLFLAG_RD, &num_buf_aio, 0,
158 "Number of aio requests presently handled by the buf subsystem");
159
160/* Number of async I/O thread in the process of being started */
161/* XXX This should be local to aio_aqueue() */
162static int num_aio_resv_start = 0;
163
164static int aiod_timeout;
165SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_timeout, CTLFLAG_RW, &aiod_timeout, 0,
166 "Timeout value for synchronous aio operations");
167
168static int aiod_lifetime;
169SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_lifetime, CTLFLAG_RW, &aiod_lifetime, 0,
170 "Maximum lifetime for idle aiod");
171
172static int unloadable = 0;
173SYSCTL_INT(_vfs_aio, OID_AUTO, unloadable, CTLFLAG_RW, &unloadable, 0,
174 "Allow unload of aio (not recommended)");
175
176
177static int max_aio_per_proc = MAX_AIO_PER_PROC;
178SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_per_proc, CTLFLAG_RW, &max_aio_per_proc,
179 0, "Maximum active aio requests per process (stored in the process)");
180
181static int max_aio_queue_per_proc = MAX_AIO_QUEUE_PER_PROC;
182SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue_per_proc, CTLFLAG_RW,
183 &max_aio_queue_per_proc, 0,
184 "Maximum queued aio requests per process (stored in the process)");
185
186static int max_buf_aio = MAX_BUF_AIO;
187SYSCTL_INT(_vfs_aio, OID_AUTO, max_buf_aio, CTLFLAG_RW, &max_buf_aio, 0,
188 "Maximum buf aio requests per process (stored in the process)");
189
190typedef struct oaiocb {
191 int aio_fildes; /* File descriptor */
192 off_t aio_offset; /* File offset for I/O */
193 volatile void *aio_buf; /* I/O buffer in process space */
194 size_t aio_nbytes; /* Number of bytes for I/O */
195 struct osigevent aio_sigevent; /* Signal to deliver */
196 int aio_lio_opcode; /* LIO opcode */
197 int aio_reqprio; /* Request priority -- ignored */
198 struct __aiocb_private _aiocb_private;
199} oaiocb_t;
200
201/*
202 * Below is a key of locks used to protect each member of struct aiocblist
203 * aioliojob and kaioinfo and any backends.
204 *
205 * * - need not protected
206 * a - locked by kaioinfo lock
207 * b - locked by backend lock, the backend lock can be null in some cases,
208 * for example, BIO belongs to this type, in this case, proc lock is
209 * reused.
210 * c - locked by aio_job_mtx, the lock for the generic file I/O backend.
211 */
212
213/*
214 * Current, there is only two backends: BIO and generic file I/O.
215 * socket I/O is served by generic file I/O, this is not a good idea, since
216 * disk file I/O and any other types without O_NONBLOCK flag can block daemon
217 * threads, if there is no thread to serve socket I/O, the socket I/O will be
218 * delayed too long or starved, we should create some threads dedicated to
219 * sockets to do non-blocking I/O, same for pipe and fifo, for these I/O
220 * systems we really need non-blocking interface, fiddling O_NONBLOCK in file
221 * structure is not safe because there is race between userland and aio
222 * daemons.
223 */
224
225struct aiocblist {
226 TAILQ_ENTRY(aiocblist) list; /* (b) internal list of for backend */
227 TAILQ_ENTRY(aiocblist) plist; /* (a) list of jobs for each backend */
228 TAILQ_ENTRY(aiocblist) allist; /* (a) list of all jobs in proc */
229 int jobflags; /* (a) job flags */
230 int jobstate; /* (b) job state */
231 int inputcharge; /* (*) input blockes */
232 int outputcharge; /* (*) output blockes */
233 struct buf *bp; /* (*) private to BIO backend,
234 * buffer pointer
235 */
236 struct proc *userproc; /* (*) user process */
237 struct ucred *cred; /* (*) active credential when created */
238 struct file *fd_file; /* (*) pointer to file structure */
239 struct aioliojob *lio; /* (*) optional lio job */
240 struct aiocb *uuaiocb; /* (*) pointer in userspace of aiocb */
241 struct knlist klist; /* (a) list of knotes */
242 struct aiocb uaiocb; /* (*) kernel I/O control block */
243 ksiginfo_t ksi; /* (a) realtime signal info */
244 struct task biotask; /* (*) private to BIO backend */
245 uint64_t seqno; /* (*) job number */
246 int pending; /* (a) number of pending I/O, aio_fsync only */
247};
248
249/* jobflags */
250#define AIOCBLIST_DONE 0x01
251#define AIOCBLIST_BUFDONE 0x02
252#define AIOCBLIST_RUNDOWN 0x04
253#define AIOCBLIST_CHECKSYNC 0x08
254
255/*
256 * AIO process info
257 */
258#define AIOP_FREE 0x1 /* proc on free queue */
259
260struct aiothreadlist {
261 int aiothreadflags; /* (c) AIO proc flags */
262 TAILQ_ENTRY(aiothreadlist) list; /* (c) list of processes */
263 struct thread *aiothread; /* (*) the AIO thread */
264};
265
266/*
267 * data-structure for lio signal management
268 */
269struct aioliojob {
270 int lioj_flags; /* (a) listio flags */
271 int lioj_count; /* (a) listio flags */
272 int lioj_finished_count; /* (a) listio flags */
273 struct sigevent lioj_signal; /* (a) signal on all I/O done */
274 TAILQ_ENTRY(aioliojob) lioj_list; /* (a) lio list */
275 struct knlist klist; /* (a) list of knotes */
276 ksiginfo_t lioj_ksi; /* (a) Realtime signal info */
277};
278
279#define LIOJ_SIGNAL 0x1 /* signal on all done (lio) */
280#define LIOJ_SIGNAL_POSTED 0x2 /* signal has been posted */
281#define LIOJ_KEVENT_POSTED 0x4 /* kevent triggered */
282
283/*
284 * per process aio data structure
285 */
286struct kaioinfo {
287 struct mtx kaio_mtx; /* the lock to protect this struct */
288 int kaio_flags; /* (a) per process kaio flags */
289 int kaio_maxactive_count; /* (*) maximum number of AIOs */
290 int kaio_active_count; /* (c) number of currently used AIOs */
291 int kaio_qallowed_count; /* (*) maxiumu size of AIO queue */
292 int kaio_count; /* (a) size of AIO queue */
293 int kaio_ballowed_count; /* (*) maximum number of buffers */
294 int kaio_buffer_count; /* (a) number of physio buffers */
295 TAILQ_HEAD(,aiocblist) kaio_all; /* (a) all AIOs in the process */
296 TAILQ_HEAD(,aiocblist) kaio_done; /* (a) done queue for process */
297 TAILQ_HEAD(,aioliojob) kaio_liojoblist; /* (a) list of lio jobs */
298 TAILQ_HEAD(,aiocblist) kaio_jobqueue; /* (a) job queue for process */
299 TAILQ_HEAD(,aiocblist) kaio_bufqueue; /* (a) buffer job queue for process */
300 TAILQ_HEAD(,aiocblist) kaio_sockqueue; /* (a) queue for aios waiting on sockets,
301 * NOT USED YET.
302 */
303 TAILQ_HEAD(,aiocblist) kaio_syncqueue; /* (a) queue for aio_fsync */
304 struct task kaio_task; /* (*) task to kick aio threads */
305};
306
307#define AIO_LOCK(ki) mtx_lock(&(ki)->kaio_mtx)
308#define AIO_UNLOCK(ki) mtx_unlock(&(ki)->kaio_mtx)
309#define AIO_LOCK_ASSERT(ki, f) mtx_assert(&(ki)->kaio_mtx, (f))
310#define AIO_MTX(ki) (&(ki)->kaio_mtx)
311
312#define KAIO_RUNDOWN 0x1 /* process is being run down */
313#define KAIO_WAKEUP 0x2 /* wakeup process when there is a significant event */
314
315/*
316 * Operations used to interact with userland aio control blocks.
317 * Different ABIs provide their own operations.
318 */
319struct aiocb_ops {
320 int (*copyin)(struct aiocb *ujob, struct aiocb *kjob);
321 long (*fetch_status)(struct aiocb *ujob);
322 long (*fetch_error)(struct aiocb *ujob);
323 int (*store_status)(struct aiocb *ujob, long status);
324 int (*store_error)(struct aiocb *ujob, long error);
325 int (*store_kernelinfo)(struct aiocb *ujob, long jobref);
326 int (*store_aiocb)(struct aiocb **ujobp, struct aiocb *ujob);
327};
328
329static TAILQ_HEAD(,aiothreadlist) aio_freeproc; /* (c) Idle daemons */
330static struct sema aio_newproc_sem;
331static struct mtx aio_job_mtx;
332static struct mtx aio_sock_mtx;
333static TAILQ_HEAD(,aiocblist) aio_jobs; /* (c) Async job list */
334static struct unrhdr *aiod_unr;
335
336void aio_init_aioinfo(struct proc *p);
337static void aio_onceonly(void);
338static int aio_free_entry(struct aiocblist *aiocbe);
339static void aio_process(struct aiocblist *aiocbe);
340static int aio_newproc(int *);
341int aio_aqueue(struct thread *td, struct aiocb *job,
342 struct aioliojob *lio, int type, struct aiocb_ops *ops);
343static void aio_physwakeup(struct buf *bp);
344static void aio_proc_rundown(void *arg, struct proc *p);
345static void aio_proc_rundown_exec(void *arg, struct proc *p, struct image_params *imgp);
346static int aio_qphysio(struct proc *p, struct aiocblist *iocb);
347static void biohelper(void *, int);
348static void aio_daemon(void *param);
349static void aio_swake_cb(struct socket *, struct sockbuf *);
350static int aio_unload(void);
351static void aio_bio_done_notify(struct proc *userp, struct aiocblist *aiocbe, int type);
352#define DONE_BUF 1
353#define DONE_QUEUE 2
354static int aio_kick(struct proc *userp);
355static void aio_kick_nowait(struct proc *userp);
356static void aio_kick_helper(void *context, int pending);
357static int filt_aioattach(struct knote *kn);
358static void filt_aiodetach(struct knote *kn);
359static int filt_aio(struct knote *kn, long hint);
360static int filt_lioattach(struct knote *kn);
361static void filt_liodetach(struct knote *kn);
362static int filt_lio(struct knote *kn, long hint);
363
364/*
365 * Zones for:
366 * kaio Per process async io info
367 * aiop async io thread data
368 * aiocb async io jobs
369 * aiol list io job pointer - internal to aio_suspend XXX
370 * aiolio list io jobs
371 */
372static uma_zone_t kaio_zone, aiop_zone, aiocb_zone, aiol_zone, aiolio_zone;
373
374/* kqueue filters for aio */
375static struct filterops aio_filtops =
376 { 0, filt_aioattach, filt_aiodetach, filt_aio };
377static struct filterops lio_filtops =
378 { 0, filt_lioattach, filt_liodetach, filt_lio };
379
380static eventhandler_tag exit_tag, exec_tag;
381
382TASKQUEUE_DEFINE_THREAD(aiod_bio);
383
384/*
385 * Main operations function for use as a kernel module.
386 */
387static int
388aio_modload(struct module *module, int cmd, void *arg)
389{
390 int error = 0;
391
392 switch (cmd) {
393 case MOD_LOAD:
394 aio_onceonly();
395 break;
396 case MOD_UNLOAD:
397 error = aio_unload();
398 break;
399 case MOD_SHUTDOWN:
400 break;
401 default:
402 error = EINVAL;
403 break;
404 }
405 return (error);
406}
407
408static moduledata_t aio_mod = {
409 "aio",
410 &aio_modload,
411 NULL
412};
413
414SYSCALL_MODULE_HELPER(aio_cancel);
415SYSCALL_MODULE_HELPER(aio_error);
416SYSCALL_MODULE_HELPER(aio_fsync);
417SYSCALL_MODULE_HELPER(aio_read);
418SYSCALL_MODULE_HELPER(aio_return);
419SYSCALL_MODULE_HELPER(aio_suspend);
420SYSCALL_MODULE_HELPER(aio_waitcomplete);
421SYSCALL_MODULE_HELPER(aio_write);
422SYSCALL_MODULE_HELPER(lio_listio);
423SYSCALL_MODULE_HELPER(oaio_read);
424SYSCALL_MODULE_HELPER(oaio_write);
425SYSCALL_MODULE_HELPER(olio_listio);
426
427DECLARE_MODULE(aio, aio_mod,
428 SI_SUB_VFS, SI_ORDER_ANY);
429MODULE_VERSION(aio, 1);
430
431/*
432 * Startup initialization
433 */
434static void
435aio_onceonly(void)
436{
437
438 /* XXX: should probably just use so->callback */
439 aio_swake = &aio_swake_cb;
440 exit_tag = EVENTHANDLER_REGISTER(process_exit, aio_proc_rundown, NULL,
441 EVENTHANDLER_PRI_ANY);
442 exec_tag = EVENTHANDLER_REGISTER(process_exec, aio_proc_rundown_exec, NULL,
443 EVENTHANDLER_PRI_ANY);
444 kqueue_add_filteropts(EVFILT_AIO, &aio_filtops);
445 kqueue_add_filteropts(EVFILT_LIO, &lio_filtops);
446 TAILQ_INIT(&aio_freeproc);
447 sema_init(&aio_newproc_sem, 0, "aio_new_proc");
448 mtx_init(&aio_job_mtx, "aio_job", NULL, MTX_DEF);
449 mtx_init(&aio_sock_mtx, "aio_sock", NULL, MTX_DEF);
450 TAILQ_INIT(&aio_jobs);
451 aiod_unr = new_unrhdr(1, INT_MAX, NULL);
452 kaio_zone = uma_zcreate("AIO", sizeof(struct kaioinfo), NULL, NULL,
453 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
454 aiop_zone = uma_zcreate("AIOP", sizeof(struct aiothreadlist), NULL,
455 NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
456 aiocb_zone = uma_zcreate("AIOCB", sizeof(struct aiocblist), NULL, NULL,
457 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
458 aiol_zone = uma_zcreate("AIOL", AIO_LISTIO_MAX*sizeof(intptr_t) , NULL,
459 NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
460 aiolio_zone = uma_zcreate("AIOLIO", sizeof(struct aioliojob), NULL,
461 NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
462 aiod_timeout = AIOD_TIMEOUT_DEFAULT;
463 aiod_lifetime = AIOD_LIFETIME_DEFAULT;
464 jobrefid = 1;
465 async_io_version = _POSIX_VERSION;
466 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, AIO_LISTIO_MAX);
467 p31b_setcfg(CTL_P1003_1B_AIO_MAX, MAX_AIO_QUEUE);
468 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, 0);
469}
470
471/*
472 * Callback for unload of AIO when used as a module.
473 */
474static int
475aio_unload(void)
476{
477 int error;
478
479 /*
480 * XXX: no unloads by default, it's too dangerous.
481 * perhaps we could do it if locked out callers and then
482 * did an aio_proc_rundown() on each process.
483 *
484 * jhb: aio_proc_rundown() needs to run on curproc though,
485 * so I don't think that would fly.
486 */
487 if (!unloadable)
488 return (EOPNOTSUPP);
489
490 error = kqueue_del_filteropts(EVFILT_AIO);
491 if (error)
492 return error;
493 error = kqueue_del_filteropts(EVFILT_LIO);
494 if (error)
495 return error;
496 async_io_version = 0;
497 aio_swake = NULL;
498 taskqueue_free(taskqueue_aiod_bio);
499 delete_unrhdr(aiod_unr);
500 uma_zdestroy(kaio_zone);
501 uma_zdestroy(aiop_zone);
502 uma_zdestroy(aiocb_zone);
503 uma_zdestroy(aiol_zone);
504 uma_zdestroy(aiolio_zone);
505 EVENTHANDLER_DEREGISTER(process_exit, exit_tag);
506 EVENTHANDLER_DEREGISTER(process_exec, exec_tag);
507 mtx_destroy(&aio_job_mtx);
508 mtx_destroy(&aio_sock_mtx);
509 sema_destroy(&aio_newproc_sem);
510 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1);
511 p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1);
512 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1);
513 return (0);
514}
515
516/*
517 * Init the per-process aioinfo structure. The aioinfo limits are set
518 * per-process for user limit (resource) management.
519 */
520void
521aio_init_aioinfo(struct proc *p)
522{
523 struct kaioinfo *ki;
524
525 ki = uma_zalloc(kaio_zone, M_WAITOK);
526 mtx_init(&ki->kaio_mtx, "aiomtx", NULL, MTX_DEF);
527 ki->kaio_flags = 0;
528 ki->kaio_maxactive_count = max_aio_per_proc;
529 ki->kaio_active_count = 0;
530 ki->kaio_qallowed_count = max_aio_queue_per_proc;
531 ki->kaio_count = 0;
532 ki->kaio_ballowed_count = max_buf_aio;
533 ki->kaio_buffer_count = 0;
534 TAILQ_INIT(&ki->kaio_all);
535 TAILQ_INIT(&ki->kaio_done);
536 TAILQ_INIT(&ki->kaio_jobqueue);
537 TAILQ_INIT(&ki->kaio_bufqueue);
538 TAILQ_INIT(&ki->kaio_liojoblist);
539 TAILQ_INIT(&ki->kaio_sockqueue);
540 TAILQ_INIT(&ki->kaio_syncqueue);
541 TASK_INIT(&ki->kaio_task, 0, aio_kick_helper, p);
542 PROC_LOCK(p);
543 if (p->p_aioinfo == NULL) {
544 p->p_aioinfo = ki;
545 PROC_UNLOCK(p);
546 } else {
547 PROC_UNLOCK(p);
548 mtx_destroy(&ki->kaio_mtx);
549 uma_zfree(kaio_zone, ki);
550 }
551
552 while (num_aio_procs < MIN(target_aio_procs, max_aio_procs))
553 aio_newproc(NULL);
554}
555
556static int
557aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi)
558{
559 int ret = 0;
560
561 PROC_LOCK(p);
562 if (!KSI_ONQ(ksi)) {
563 ksi->ksi_code = SI_ASYNCIO;
564 ksi->ksi_flags |= KSI_EXT | KSI_INS;
565 ret = psignal_event(p, sigev, ksi);
566 }
567 PROC_UNLOCK(p);
568 return (ret);
569}
570
571/*
572 * Free a job entry. Wait for completion if it is currently active, but don't
573 * delay forever. If we delay, we return a flag that says that we have to
574 * restart the queue scan.
575 */
576static int
577aio_free_entry(struct aiocblist *aiocbe)
578{
579 struct kaioinfo *ki;
580 struct aioliojob *lj;
581 struct proc *p;
582
583 p = aiocbe->userproc;
584 MPASS(curproc == p);
585 ki = p->p_aioinfo;
586 MPASS(ki != NULL);
587
588 AIO_LOCK_ASSERT(ki, MA_OWNED);
589 MPASS(aiocbe->jobstate == JOBST_JOBFINISHED);
590
591 atomic_subtract_int(&num_queue_count, 1);
592
593 ki->kaio_count--;
594 MPASS(ki->kaio_count >= 0);
595
596 TAILQ_REMOVE(&ki->kaio_done, aiocbe, plist);
597 TAILQ_REMOVE(&ki->kaio_all, aiocbe, allist);
598
599 lj = aiocbe->lio;
600 if (lj) {
601 lj->lioj_count--;
602 lj->lioj_finished_count--;
603
604 if (lj->lioj_count == 0) {
605 TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
606 /* lio is going away, we need to destroy any knotes */
607 knlist_delete(&lj->klist, curthread, 1);
608 PROC_LOCK(p);
609 sigqueue_take(&lj->lioj_ksi);
610 PROC_UNLOCK(p);
611 uma_zfree(aiolio_zone, lj);
612 }
613 }
614
615 /* aiocbe is going away, we need to destroy any knotes */
616 knlist_delete(&aiocbe->klist, curthread, 1);
617 PROC_LOCK(p);
618 sigqueue_take(&aiocbe->ksi);
619 PROC_UNLOCK(p);
620
621 MPASS(aiocbe->bp == NULL);
622 aiocbe->jobstate = JOBST_NULL;
623 AIO_UNLOCK(ki);
624
625 /*
626 * The thread argument here is used to find the owning process
627 * and is also passed to fo_close() which may pass it to various
628 * places such as devsw close() routines. Because of that, we
629 * need a thread pointer from the process owning the job that is
630 * persistent and won't disappear out from under us or move to
631 * another process.
632 *
633 * Currently, all the callers of this function call it to remove
634 * an aiocblist from the current process' job list either via a
635 * syscall or due to the current process calling exit() or
636 * execve(). Thus, we know that p == curproc. We also know that
637 * curthread can't exit since we are curthread.
638 *
639 * Therefore, we use curthread as the thread to pass to
640 * knlist_delete(). This does mean that it is possible for the
641 * thread pointer at close time to differ from the thread pointer
642 * at open time, but this is already true of file descriptors in
643 * a multithreaded process.
644 */
645 fdrop(aiocbe->fd_file, curthread);
646 crfree(aiocbe->cred);
647 uma_zfree(aiocb_zone, aiocbe);
648 AIO_LOCK(ki);
649
650 return (0);
651}
652
653static void
654aio_proc_rundown_exec(void *arg, struct proc *p, struct image_params *imgp __unused)
655{
656 aio_proc_rundown(arg, p);
657}
658
659/*
660 * Rundown the jobs for a given process.
661 */
662static void
663aio_proc_rundown(void *arg, struct proc *p)
664{
665 struct kaioinfo *ki;
666 struct aioliojob *lj;
667 struct aiocblist *cbe, *cbn;
668 struct file *fp;
669 struct socket *so;
670 int remove;
671
672 KASSERT(curthread->td_proc == p,
673 ("%s: called on non-curproc", __func__));
674 ki = p->p_aioinfo;
675 if (ki == NULL)
676 return;
677
678 AIO_LOCK(ki);
679 ki->kaio_flags |= KAIO_RUNDOWN;
680
681restart:
682
683 /*
684 * Try to cancel all pending requests. This code simulates
685 * aio_cancel on all pending I/O requests.
686 */
687 TAILQ_FOREACH_SAFE(cbe, &ki->kaio_jobqueue, plist, cbn) {
688 remove = 0;
689 mtx_lock(&aio_job_mtx);
690 if (cbe->jobstate == JOBST_JOBQGLOBAL) {
691 TAILQ_REMOVE(&aio_jobs, cbe, list);
692 remove = 1;
693 } else if (cbe->jobstate == JOBST_JOBQSOCK) {
694 fp = cbe->fd_file;
695 MPASS(fp->f_type == DTYPE_SOCKET);
696 so = fp->f_data;
697 TAILQ_REMOVE(&so->so_aiojobq, cbe, list);
698 remove = 1;
699 } else if (cbe->jobstate == JOBST_JOBQSYNC) {
700 TAILQ_REMOVE(&ki->kaio_syncqueue, cbe, list);
701 remove = 1;
702 }
703 mtx_unlock(&aio_job_mtx);
704
705 if (remove) {
706 cbe->jobstate = JOBST_JOBFINISHED;
707 cbe->uaiocb._aiocb_private.status = -1;
708 cbe->uaiocb._aiocb_private.error = ECANCELED;
709 TAILQ_REMOVE(&ki->kaio_jobqueue, cbe, plist);
710 aio_bio_done_notify(p, cbe, DONE_QUEUE);
711 }
712 }
713
714 /* Wait for all running I/O to be finished */
715 if (TAILQ_FIRST(&ki->kaio_bufqueue) ||
716 TAILQ_FIRST(&ki->kaio_jobqueue)) {
717 ki->kaio_flags |= KAIO_WAKEUP;
718 msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO, "aioprn", hz);
719 goto restart;
720 }
721
722 /* Free all completed I/O requests. */
723 while ((cbe = TAILQ_FIRST(&ki->kaio_done)) != NULL)
724 aio_free_entry(cbe);
725
726 while ((lj = TAILQ_FIRST(&ki->kaio_liojoblist)) != NULL) {
727 if (lj->lioj_count == 0) {
728 TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
729 knlist_delete(&lj->klist, curthread, 1);
730 PROC_LOCK(p);
731 sigqueue_take(&lj->lioj_ksi);
732 PROC_UNLOCK(p);
733 uma_zfree(aiolio_zone, lj);
734 } else {
735 panic("LIO job not cleaned up: C:%d, FC:%d\n",
736 lj->lioj_count, lj->lioj_finished_count);
737 }
738 }
739 AIO_UNLOCK(ki);
740 taskqueue_drain(taskqueue_aiod_bio, &ki->kaio_task);
741 mtx_destroy(&ki->kaio_mtx);
742 uma_zfree(kaio_zone, ki);
743 p->p_aioinfo = NULL;
744}
745
746/*
747 * Select a job to run (called by an AIO daemon).
748 */
749static struct aiocblist *
750aio_selectjob(struct aiothreadlist *aiop)
751{
752 struct aiocblist *aiocbe;
753 struct kaioinfo *ki;
754 struct proc *userp;
755
756 mtx_assert(&aio_job_mtx, MA_OWNED);
757 TAILQ_FOREACH(aiocbe, &aio_jobs, list) {
758 userp = aiocbe->userproc;
759 ki = userp->p_aioinfo;
760
761 if (ki->kaio_active_count < ki->kaio_maxactive_count) {
762 TAILQ_REMOVE(&aio_jobs, aiocbe, list);
763 /* Account for currently active jobs. */
764 ki->kaio_active_count++;
765 aiocbe->jobstate = JOBST_JOBRUNNING;
766 break;
767 }
768 }
769 return (aiocbe);
770}
771
772/*
773 * Move all data to a permanent storage device, this code
774 * simulates fsync syscall.
775 */
776static int
777aio_fsync_vnode(struct thread *td, struct vnode *vp)
778{
779 struct mount *mp;
780 int vfslocked;
781 int error;
782
783 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
784 if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
785 goto drop;
786 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
787 if (vp->v_object != NULL) {
788 VM_OBJECT_LOCK(vp->v_object);
789 vm_object_page_clean(vp->v_object, 0, 0, 0);
790 VM_OBJECT_UNLOCK(vp->v_object);
791 }
792 error = VOP_FSYNC(vp, MNT_WAIT, td);
793
794 VOP_UNLOCK(vp, 0);
795 vn_finished_write(mp);
796drop:
797 VFS_UNLOCK_GIANT(vfslocked);
798 return (error);
799}
800
801/*
802 * The AIO processing activity. This is the code that does the I/O request for
803 * the non-physio version of the operations. The normal vn operations are used,
804 * and this code should work in all instances for every type of file, including
805 * pipes, sockets, fifos, and regular files.
806 *
807 * XXX I don't think it works well for socket, pipe, and fifo.
808 */
809static void
810aio_process(struct aiocblist *aiocbe)
811{
812 struct ucred *td_savedcred;
813 struct thread *td;
814 struct aiocb *cb;
815 struct file *fp;
816 struct socket *so;
817 struct uio auio;
818 struct iovec aiov;
819 int cnt;
820 int error;
821 int oublock_st, oublock_end;
822 int inblock_st, inblock_end;
823
824 td = curthread;
825 td_savedcred = td->td_ucred;
826 td->td_ucred = aiocbe->cred;
827 cb = &aiocbe->uaiocb;
828 fp = aiocbe->fd_file;
829
830 if (cb->aio_lio_opcode == LIO_SYNC) {
831 error = 0;
832 cnt = 0;
833 if (fp->f_vnode != NULL)
834 error = aio_fsync_vnode(td, fp->f_vnode);
835 cb->_aiocb_private.error = error;
836 cb->_aiocb_private.status = 0;
837 td->td_ucred = td_savedcred;
838 return;
839 }
840
841 aiov.iov_base = (void *)(uintptr_t)cb->aio_buf;
842 aiov.iov_len = cb->aio_nbytes;
843
844 auio.uio_iov = &aiov;
845 auio.uio_iovcnt = 1;
846 auio.uio_offset = cb->aio_offset;
847 auio.uio_resid = cb->aio_nbytes;
848 cnt = cb->aio_nbytes;
849 auio.uio_segflg = UIO_USERSPACE;
850 auio.uio_td = td;
851
852 inblock_st = td->td_ru.ru_inblock;
853 oublock_st = td->td_ru.ru_oublock;
854 /*
855 * aio_aqueue() acquires a reference to the file that is
856 * released in aio_free_entry().
857 */
858 if (cb->aio_lio_opcode == LIO_READ) {
859 auio.uio_rw = UIO_READ;
860 if (auio.uio_resid == 0)
861 error = 0;
862 else
863 error = fo_read(fp, &auio, fp->f_cred, FOF_OFFSET, td);
864 } else {
865 if (fp->f_type == DTYPE_VNODE)
866 bwillwrite();
867 auio.uio_rw = UIO_WRITE;
868 error = fo_write(fp, &auio, fp->f_cred, FOF_OFFSET, td);
869 }
870 inblock_end = td->td_ru.ru_inblock;
871 oublock_end = td->td_ru.ru_oublock;
872
873 aiocbe->inputcharge = inblock_end - inblock_st;
874 aiocbe->outputcharge = oublock_end - oublock_st;
875
876 if ((error) && (auio.uio_resid != cnt)) {
877 if (error == ERESTART || error == EINTR || error == EWOULDBLOCK)
878 error = 0;
879 if ((error == EPIPE) && (cb->aio_lio_opcode == LIO_WRITE)) {
880 int sigpipe = 1;
881 if (fp->f_type == DTYPE_SOCKET) {
882 so = fp->f_data;
883 if (so->so_options & SO_NOSIGPIPE)
884 sigpipe = 0;
885 }
886 if (sigpipe) {
887 PROC_LOCK(aiocbe->userproc);
888 psignal(aiocbe->userproc, SIGPIPE);
889 PROC_UNLOCK(aiocbe->userproc);
890 }
891 }
892 }
893
894 cnt -= auio.uio_resid;
895 cb->_aiocb_private.error = error;
896 cb->_aiocb_private.status = cnt;
897 td->td_ucred = td_savedcred;
898}
899
900static void
901aio_bio_done_notify(struct proc *userp, struct aiocblist *aiocbe, int type)
902{
903 struct aioliojob *lj;
904 struct kaioinfo *ki;
905 struct aiocblist *scb, *scbn;
906 int lj_done;
907
908 ki = userp->p_aioinfo;
909 AIO_LOCK_ASSERT(ki, MA_OWNED);
910 lj = aiocbe->lio;
911 lj_done = 0;
912 if (lj) {
913 lj->lioj_finished_count++;
914 if (lj->lioj_count == lj->lioj_finished_count)
915 lj_done = 1;
916 }
917 if (type == DONE_QUEUE) {
918 aiocbe->jobflags |= AIOCBLIST_DONE;
919 } else {
920 aiocbe->jobflags |= AIOCBLIST_BUFDONE;
921 }
922 TAILQ_INSERT_TAIL(&ki->kaio_done, aiocbe, plist);
923 aiocbe->jobstate = JOBST_JOBFINISHED;
924
925 if (ki->kaio_flags & KAIO_RUNDOWN)
926 goto notification_done;
927
928 if (aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL ||
929 aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID)
930 aio_sendsig(userp, &aiocbe->uaiocb.aio_sigevent, &aiocbe->ksi);
931
932 KNOTE_LOCKED(&aiocbe->klist, 1);
933
934 if (lj_done) {
935 if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
936 lj->lioj_flags |= LIOJ_KEVENT_POSTED;
937 KNOTE_LOCKED(&lj->klist, 1);
938 }
939 if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED))
940 == LIOJ_SIGNAL
941 && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
942 lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) {
943 aio_sendsig(userp, &lj->lioj_signal, &lj->lioj_ksi);
944 lj->lioj_flags |= LIOJ_SIGNAL_POSTED;
945 }
946 }
947
948notification_done:
949 if (aiocbe->jobflags & AIOCBLIST_CHECKSYNC) {
950 TAILQ_FOREACH_SAFE(scb, &ki->kaio_syncqueue, list, scbn) {
951 if (aiocbe->fd_file == scb->fd_file &&
952 aiocbe->seqno < scb->seqno) {
953 if (--scb->pending == 0) {
954 mtx_lock(&aio_job_mtx);
955 scb->jobstate = JOBST_JOBQGLOBAL;
956 TAILQ_REMOVE(&ki->kaio_syncqueue, scb, list);
957 TAILQ_INSERT_TAIL(&aio_jobs, scb, list);
958 aio_kick_nowait(userp);
959 mtx_unlock(&aio_job_mtx);
960 }
961 }
962 }
963 }
964 if (ki->kaio_flags & KAIO_WAKEUP) {
965 ki->kaio_flags &= ~KAIO_WAKEUP;
966 wakeup(&userp->p_aioinfo);
967 }
968}
969
970/*
971 * The AIO daemon, most of the actual work is done in aio_process,
972 * but the setup (and address space mgmt) is done in this routine.
973 */
974static void
975aio_daemon(void *_id)
976{
977 struct aiocblist *aiocbe;
978 struct aiothreadlist *aiop;
979 struct kaioinfo *ki;
980 struct proc *curcp, *mycp, *userp;
981 struct vmspace *myvm, *tmpvm;
982 struct thread *td = curthread;
983 int id = (intptr_t)_id;
984
985 /*
986 * Local copies of curproc (cp) and vmspace (myvm)
987 */
988 mycp = td->td_proc;
989 myvm = mycp->p_vmspace;
990
991 KASSERT(mycp->p_textvp == NULL, ("kthread has a textvp"));
992
993 /*
994 * Allocate and ready the aio control info. There is one aiop structure
995 * per daemon.
996 */
997 aiop = uma_zalloc(aiop_zone, M_WAITOK);
998 aiop->aiothread = td;
999 aiop->aiothreadflags = 0;
1000
1001 /* The daemon resides in its own pgrp. */
1002 setsid(td, NULL);
1003
1004 /*
1005 * Wakeup parent process. (Parent sleeps to keep from blasting away
1006 * and creating too many daemons.)
1007 */
1008 sema_post(&aio_newproc_sem);
1009
1010 mtx_lock(&aio_job_mtx);
1011 for (;;) {
1012 /*
1013 * curcp is the current daemon process context.
1014 * userp is the current user process context.
1015 */
1016 curcp = mycp;
1017
1018 /*
1019 * Take daemon off of free queue
1020 */
1021 if (aiop->aiothreadflags & AIOP_FREE) {
1022 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1023 aiop->aiothreadflags &= ~AIOP_FREE;
1024 }
1025
1026 /*
1027 * Check for jobs.
1028 */
1029 while ((aiocbe = aio_selectjob(aiop)) != NULL) {
1030 mtx_unlock(&aio_job_mtx);
1031 userp = aiocbe->userproc;
1032
1033 /*
1034 * Connect to process address space for user program.
1035 */
1036 if (userp != curcp) {
1037 /*
1038 * Save the current address space that we are
1039 * connected to.
1040 */
1041 tmpvm = mycp->p_vmspace;
1042
1043 /*
1044 * Point to the new user address space, and
1045 * refer to it.
1046 */
1047 mycp->p_vmspace = userp->p_vmspace;
1048 atomic_add_int(&mycp->p_vmspace->vm_refcnt, 1);
1049
1050 /* Activate the new mapping. */
1051 pmap_activate(FIRST_THREAD_IN_PROC(mycp));
1052
1053 /*
1054 * If the old address space wasn't the daemons
1055 * own address space, then we need to remove the
1056 * daemon's reference from the other process
1057 * that it was acting on behalf of.
1058 */
1059 if (tmpvm != myvm) {
1060 vmspace_free(tmpvm);
1061 }
1062 curcp = userp;
1063 }
1064
1065 ki = userp->p_aioinfo;
1066
1067 /* Do the I/O function. */
1068 aio_process(aiocbe);
1069
1070 mtx_lock(&aio_job_mtx);
1071 /* Decrement the active job count. */
1072 ki->kaio_active_count--;
1073 mtx_unlock(&aio_job_mtx);
1074
1075 AIO_LOCK(ki);
1076 TAILQ_REMOVE(&ki->kaio_jobqueue, aiocbe, plist);
1077 aio_bio_done_notify(userp, aiocbe, DONE_QUEUE);
1078 AIO_UNLOCK(ki);
1079
1080 mtx_lock(&aio_job_mtx);
1081 }
1082
1083 /*
1084 * Disconnect from user address space.
1085 */
1086 if (curcp != mycp) {
1087
1088 mtx_unlock(&aio_job_mtx);
1089
1090 /* Get the user address space to disconnect from. */
1091 tmpvm = mycp->p_vmspace;
1092
1093 /* Get original address space for daemon. */
1094 mycp->p_vmspace = myvm;
1095
1096 /* Activate the daemon's address space. */
1097 pmap_activate(FIRST_THREAD_IN_PROC(mycp));
1098#ifdef DIAGNOSTIC
1099 if (tmpvm == myvm) {
1100 printf("AIOD: vmspace problem -- %d\n",
1101 mycp->p_pid);
1102 }
1103#endif
1104 /* Remove our vmspace reference. */
1105 vmspace_free(tmpvm);
1106
1107 curcp = mycp;
1108
1109 mtx_lock(&aio_job_mtx);
1110 /*
1111 * We have to restart to avoid race, we only sleep if
1112 * no job can be selected, that should be
1113 * curcp == mycp.
1114 */
1115 continue;
1116 }
1117
1118 mtx_assert(&aio_job_mtx, MA_OWNED);
1119
1120 TAILQ_INSERT_HEAD(&aio_freeproc, aiop, list);
1121 aiop->aiothreadflags |= AIOP_FREE;
1122
1123 /*
1124 * If daemon is inactive for a long time, allow it to exit,
1125 * thereby freeing resources.
1126 */
1127 if (msleep(aiop->aiothread, &aio_job_mtx, PRIBIO, "aiordy",
1128 aiod_lifetime)) {
1129 if (TAILQ_EMPTY(&aio_jobs)) {
1130 if ((aiop->aiothreadflags & AIOP_FREE) &&
1131 (num_aio_procs > target_aio_procs)) {
1132 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1133 num_aio_procs--;
1134 mtx_unlock(&aio_job_mtx);
1135 uma_zfree(aiop_zone, aiop);
1136 free_unr(aiod_unr, id);
1137#ifdef DIAGNOSTIC
1138 if (mycp->p_vmspace->vm_refcnt <= 1) {
1139 printf("AIOD: bad vm refcnt for"
1140 " exiting daemon: %d\n",
1141 mycp->p_vmspace->vm_refcnt);
1142 }
1143#endif
1144 kproc_exit(0);
1145 }
1146 }
1147 }
1148 }
1149 mtx_unlock(&aio_job_mtx);
1150 panic("shouldn't be here\n");
1151}
1152
1153/*
1154 * Create a new AIO daemon. This is mostly a kernel-thread fork routine. The
1155 * AIO daemon modifies its environment itself.
1156 */
1157static int
1158aio_newproc(int *start)
1159{
1160 int error;
1161 struct proc *p;
1162 int id;
1163
1164 id = alloc_unr(aiod_unr);
1165 error = kproc_create(aio_daemon, (void *)(intptr_t)id, &p,
1166 RFNOWAIT, 0, "aiod%d", id);
1167 if (error == 0) {
1168 /*
1169 * Wait until daemon is started.
1170 */
1171 sema_wait(&aio_newproc_sem);
1172 mtx_lock(&aio_job_mtx);
1173 num_aio_procs++;
1174 if (start != NULL)
1175 (*start)--;
1176 mtx_unlock(&aio_job_mtx);
1177 } else {
1178 free_unr(aiod_unr, id);
1179 }
1180 return (error);
1181}
1182
1183/*
1184 * Try the high-performance, low-overhead physio method for eligible
1185 * VCHR devices. This method doesn't use an aio helper thread, and
1186 * thus has very low overhead.
1187 *
1188 * Assumes that the caller, aio_aqueue(), has incremented the file
1189 * structure's reference count, preventing its deallocation for the
1190 * duration of this call.
1191 */
1192static int
1193aio_qphysio(struct proc *p, struct aiocblist *aiocbe)
1194{
1195 struct aiocb *cb;
1196 struct file *fp;
1197 struct buf *bp;
1198 struct vnode *vp;
1199 struct kaioinfo *ki;
1200 struct aioliojob *lj;
1201 int error;
1202
1203 cb = &aiocbe->uaiocb;
1204 fp = aiocbe->fd_file;
1205
1206 if (fp->f_type != DTYPE_VNODE)
1207 return (-1);
1208
1209 vp = fp->f_vnode;
1210
1211 /*
1212 * If its not a disk, we don't want to return a positive error.
1213 * It causes the aio code to not fall through to try the thread
1214 * way when you're talking to a regular file.
1215 */
1216 if (!vn_isdisk(vp, &error)) {
1217 if (error == ENOTBLK)
1218 return (-1);
1219 else
1220 return (error);
1221 }
1222
1223 if (vp->v_bufobj.bo_bsize == 0)
1224 return (-1);
1225
1226 if (cb->aio_nbytes % vp->v_bufobj.bo_bsize)
1227 return (-1);
1228
1229 if (cb->aio_nbytes > vp->v_rdev->si_iosize_max)
1230 return (-1);
1231
1232 if (cb->aio_nbytes >
1233 MAXPHYS - (((vm_offset_t) cb->aio_buf) & PAGE_MASK))
1234 return (-1);
1235
1236 ki = p->p_aioinfo;
1237 if (ki->kaio_buffer_count >= ki->kaio_ballowed_count)
1238 return (-1);
1239
1240 /* Create and build a buffer header for a transfer. */
1241 bp = (struct buf *)getpbuf(NULL);
1242 BUF_KERNPROC(bp);
1243
1244 AIO_LOCK(ki);
1245 ki->kaio_count++;
1246 ki->kaio_buffer_count++;
1247 lj = aiocbe->lio;
1248 if (lj)
1249 lj->lioj_count++;
1250 AIO_UNLOCK(ki);
1251
1252 /*
1253 * Get a copy of the kva from the physical buffer.
1254 */
1255 error = 0;
1256
1257 bp->b_bcount = cb->aio_nbytes;
1258 bp->b_bufsize = cb->aio_nbytes;
1259 bp->b_iodone = aio_physwakeup;
1260 bp->b_saveaddr = bp->b_data;
1261 bp->b_data = (void *)(uintptr_t)cb->aio_buf;
1262 bp->b_offset = cb->aio_offset;
1263 bp->b_iooffset = cb->aio_offset;
1264 bp->b_blkno = btodb(cb->aio_offset);
1265 bp->b_iocmd = cb->aio_lio_opcode == LIO_WRITE ? BIO_WRITE : BIO_READ;
1266
1267 /*
1268 * Bring buffer into kernel space.
1269 */
1270 if (vmapbuf(bp) < 0) {
1271 error = EFAULT;
1272 goto doerror;
1273 }
1274
1275 AIO_LOCK(ki);
1276 aiocbe->bp = bp;
1277 bp->b_caller1 = (void *)aiocbe;
1278 TAILQ_INSERT_TAIL(&ki->kaio_bufqueue, aiocbe, plist);
1279 TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist);
1280 aiocbe->jobstate = JOBST_JOBQBUF;
1281 cb->_aiocb_private.status = cb->aio_nbytes;
1282 AIO_UNLOCK(ki);
1283
1284 atomic_add_int(&num_queue_count, 1);
1285 atomic_add_int(&num_buf_aio, 1);
1286
1287 bp->b_error = 0;
1288
1289 TASK_INIT(&aiocbe->biotask, 0, biohelper, aiocbe);
1290
1291 /* Perform transfer. */
1292 dev_strategy(vp->v_rdev, bp);
1293 return (0);
1294
1295doerror:
1296 AIO_LOCK(ki);
1297 ki->kaio_count--;
1298 ki->kaio_buffer_count--;
1299 if (lj)
1300 lj->lioj_count--;
1301 aiocbe->bp = NULL;
1302 AIO_UNLOCK(ki);
1303 relpbuf(bp, NULL);
1304 return (error);
1305}
1306
1307/*
1308 * Wake up aio requests that may be serviceable now.
1309 */
1310static void
1311aio_swake_cb(struct socket *so, struct sockbuf *sb)
1312{
1313 struct aiocblist *cb, *cbn;
1314 int opcode;
1315
|
1340}
1341
1342static int
1343convert_old_sigevent(struct osigevent *osig, struct sigevent *nsig)
1344{
1345
1346 /*
1347 * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are
1348 * supported by AIO with the old sigevent structure.
1349 */
1350 nsig->sigev_notify = osig->sigev_notify;
1351 switch (nsig->sigev_notify) {
1352 case SIGEV_NONE:
1353 break;
1354 case SIGEV_SIGNAL:
1355 nsig->sigev_signo = osig->__sigev_u.__sigev_signo;
1356 break;
1357 case SIGEV_KEVENT:
1358 nsig->sigev_notify_kqueue =
1359 osig->__sigev_u.__sigev_notify_kqueue;
1360 nsig->sigev_value.sival_ptr = osig->sigev_value.sival_ptr;
1361 break;
1362 default:
1363 return (EINVAL);
1364 }
1365 return (0);
1366}
1367
1368static int
1369aiocb_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
1370{
1371 struct oaiocb *ojob;
1372 int error;
1373
1374 bzero(kjob, sizeof(struct aiocb));
1375 error = copyin(ujob, kjob, sizeof(struct oaiocb));
1376 if (error)
1377 return (error);
1378 ojob = (struct oaiocb *)kjob;
1379 return (convert_old_sigevent(&ojob->aio_sigevent, &kjob->aio_sigevent));
1380}
1381
1382static int
1383aiocb_copyin(struct aiocb *ujob, struct aiocb *kjob)
1384{
1385
1386 return (copyin(ujob, kjob, sizeof(struct aiocb)));
1387}
1388
1389static long
1390aiocb_fetch_status(struct aiocb *ujob)
1391{
1392
1393 return (fuword(&ujob->_aiocb_private.status));
1394}
1395
1396static long
1397aiocb_fetch_error(struct aiocb *ujob)
1398{
1399
1400 return (fuword(&ujob->_aiocb_private.error));
1401}
1402
1403static int
1404aiocb_store_status(struct aiocb *ujob, long status)
1405{
1406
1407 return (suword(&ujob->_aiocb_private.status, status));
1408}
1409
1410static int
1411aiocb_store_error(struct aiocb *ujob, long error)
1412{
1413
1414 return (suword(&ujob->_aiocb_private.error, error));
1415}
1416
1417static int
1418aiocb_store_kernelinfo(struct aiocb *ujob, long jobref)
1419{
1420
1421 return (suword(&ujob->_aiocb_private.kernelinfo, jobref));
1422}
1423
1424static int
1425aiocb_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob)
1426{
1427
1428 return (suword(ujobp, (long)ujob));
1429}
1430
1431static struct aiocb_ops aiocb_ops = {
1432 .copyin = aiocb_copyin,
1433 .fetch_status = aiocb_fetch_status,
1434 .fetch_error = aiocb_fetch_error,
1435 .store_status = aiocb_store_status,
1436 .store_error = aiocb_store_error,
1437 .store_kernelinfo = aiocb_store_kernelinfo,
1438 .store_aiocb = aiocb_store_aiocb,
1439};
1440
1441static struct aiocb_ops aiocb_ops_osigevent = {
1442 .copyin = aiocb_copyin_old_sigevent,
1443 .fetch_status = aiocb_fetch_status,
1444 .fetch_error = aiocb_fetch_error,
1445 .store_status = aiocb_store_status,
1446 .store_error = aiocb_store_error,
1447 .store_kernelinfo = aiocb_store_kernelinfo,
1448 .store_aiocb = aiocb_store_aiocb,
1449};
1450
1451/*
1452 * Queue a new AIO request. Choosing either the threaded or direct physio VCHR
1453 * technique is done in this code.
1454 */
1455int
1456aio_aqueue(struct thread *td, struct aiocb *job, struct aioliojob *lj,
1457 int type, struct aiocb_ops *ops)
1458{
1459 struct proc *p = td->td_proc;
1460 struct file *fp;
1461 struct socket *so;
1462 struct aiocblist *aiocbe, *cb;
1463 struct kaioinfo *ki;
1464 struct kevent kev;
1465 struct sockbuf *sb;
1466 int opcode;
1467 int error;
1468 int fd, kqfd;
1469 int jid;
1470
1471 if (p->p_aioinfo == NULL)
1472 aio_init_aioinfo(p);
1473
1474 ki = p->p_aioinfo;
1475
1476 ops->store_status(job, -1);
1477 ops->store_error(job, 0);
1478 ops->store_kernelinfo(job, -1);
1479
1480 if (num_queue_count >= max_queue_count ||
1481 ki->kaio_count >= ki->kaio_qallowed_count) {
1482 ops->store_error(job, EAGAIN);
1483 return (EAGAIN);
1484 }
1485
1486 aiocbe = uma_zalloc(aiocb_zone, M_WAITOK | M_ZERO);
1487 aiocbe->inputcharge = 0;
1488 aiocbe->outputcharge = 0;
1489 knlist_init(&aiocbe->klist, AIO_MTX(ki), NULL, NULL, NULL);
1490
1491 error = ops->copyin(job, &aiocbe->uaiocb);
1492 if (error) {
1493 ops->store_error(job, error);
1494 uma_zfree(aiocb_zone, aiocbe);
1495 return (error);
1496 }
1497
1498 if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT &&
1499 aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_SIGNAL &&
1500 aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_THREAD_ID &&
1501 aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_NONE) {
1502 ops->store_error(job, EINVAL);
1503 uma_zfree(aiocb_zone, aiocbe);
1504 return (EINVAL);
1505 }
1506
1507 if ((aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL ||
1508 aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID) &&
1509 !_SIG_VALID(aiocbe->uaiocb.aio_sigevent.sigev_signo)) {
1510 uma_zfree(aiocb_zone, aiocbe);
1511 return (EINVAL);
1512 }
1513
1514 ksiginfo_init(&aiocbe->ksi);
1515
1516 /* Save userspace address of the job info. */
1517 aiocbe->uuaiocb = job;
1518
1519 /* Get the opcode. */
1520 if (type != LIO_NOP)
1521 aiocbe->uaiocb.aio_lio_opcode = type;
1522 opcode = aiocbe->uaiocb.aio_lio_opcode;
1523
1524 /* Fetch the file object for the specified file descriptor. */
1525 fd = aiocbe->uaiocb.aio_fildes;
1526 switch (opcode) {
1527 case LIO_WRITE:
1528 error = fget_write(td, fd, &fp);
1529 break;
1530 case LIO_READ:
1531 error = fget_read(td, fd, &fp);
1532 break;
1533 default:
1534 error = fget(td, fd, &fp);
1535 }
1536 if (error) {
1537 uma_zfree(aiocb_zone, aiocbe);
1538 ops->store_error(job, error);
1539 return (error);
1540 }
1541
1542 if (opcode == LIO_SYNC && fp->f_vnode == NULL) {
1543 error = EINVAL;
1544 goto aqueue_fail;
1545 }
1546
1547 if (opcode != LIO_SYNC && aiocbe->uaiocb.aio_offset == -1LL) {
1548 error = EINVAL;
1549 goto aqueue_fail;
1550 }
1551
1552 aiocbe->fd_file = fp;
1553
1554 mtx_lock(&aio_job_mtx);
1555 jid = jobrefid++;
1556 aiocbe->seqno = jobseqno++;
1557 mtx_unlock(&aio_job_mtx);
1558 error = ops->store_kernelinfo(job, jid);
1559 if (error) {
1560 error = EINVAL;
1561 goto aqueue_fail;
1562 }
1563 aiocbe->uaiocb._aiocb_private.kernelinfo = (void *)(intptr_t)jid;
1564
1565 if (opcode == LIO_NOP) {
1566 fdrop(fp, td);
1567 uma_zfree(aiocb_zone, aiocbe);
1568 return (0);
1569 }
1570 if ((opcode != LIO_READ) && (opcode != LIO_WRITE) &&
1571 (opcode != LIO_SYNC)) {
1572 error = EINVAL;
1573 goto aqueue_fail;
1574 }
1575
1576 if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT)
1577 goto no_kqueue;
1578 kqfd = aiocbe->uaiocb.aio_sigevent.sigev_notify_kqueue;
1579 kev.ident = (uintptr_t)aiocbe->uuaiocb;
1580 kev.filter = EVFILT_AIO;
1581 kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1;
1582 kev.data = (intptr_t)aiocbe;
1583 kev.udata = aiocbe->uaiocb.aio_sigevent.sigev_value.sival_ptr;
1584 error = kqfd_register(kqfd, &kev, td, 1);
1585aqueue_fail:
1586 if (error) {
1587 fdrop(fp, td);
1588 uma_zfree(aiocb_zone, aiocbe);
1589 ops->store_error(job, error);
1590 goto done;
1591 }
1592no_kqueue:
1593
1594 ops->store_error(job, EINPROGRESS);
1595 aiocbe->uaiocb._aiocb_private.error = EINPROGRESS;
1596 aiocbe->userproc = p;
1597 aiocbe->cred = crhold(td->td_ucred);
1598 aiocbe->jobflags = 0;
1599 aiocbe->lio = lj;
1600
1601 if (opcode == LIO_SYNC)
1602 goto queueit;
1603
1604 if (fp->f_type == DTYPE_SOCKET) {
1605 /*
1606 * Alternate queueing for socket ops: Reach down into the
1607 * descriptor to get the socket data. Then check to see if the
1608 * socket is ready to be read or written (based on the requested
1609 * operation).
1610 *
1611 * If it is not ready for io, then queue the aiocbe on the
1612 * socket, and set the flags so we get a call when sbnotify()
1613 * happens.
1614 *
1615 * Note if opcode is neither LIO_WRITE nor LIO_READ we lock
1616 * and unlock the snd sockbuf for no reason.
1617 */
1618 so = fp->f_data;
1619 sb = (opcode == LIO_READ) ? &so->so_rcv : &so->so_snd;
1620 SOCKBUF_LOCK(sb);
1621 if (((opcode == LIO_READ) && (!soreadable(so))) || ((opcode ==
1622 LIO_WRITE) && (!sowriteable(so)))) {
1623 sb->sb_flags |= SB_AIO;
1624
1625 mtx_lock(&aio_job_mtx);
1626 TAILQ_INSERT_TAIL(&so->so_aiojobq, aiocbe, list);
1627 mtx_unlock(&aio_job_mtx);
1628
1629 AIO_LOCK(ki);
1630 TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist);
1631 TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist);
1632 aiocbe->jobstate = JOBST_JOBQSOCK;
1633 ki->kaio_count++;
1634 if (lj)
1635 lj->lioj_count++;
1636 AIO_UNLOCK(ki);
1637 SOCKBUF_UNLOCK(sb);
1638 atomic_add_int(&num_queue_count, 1);
1639 error = 0;
1640 goto done;
1641 }
1642 SOCKBUF_UNLOCK(sb);
1643 }
1644
1645 if ((error = aio_qphysio(p, aiocbe)) == 0)
1646 goto done;
1647#if 0
1648 if (error > 0) {
1649 aiocbe->uaiocb._aiocb_private.error = error;
1650 ops->store_error(job, error);
1651 goto done;
1652 }
1653#endif
1654queueit:
1655 /* No buffer for daemon I/O. */
1656 aiocbe->bp = NULL;
1657 atomic_add_int(&num_queue_count, 1);
1658
1659 AIO_LOCK(ki);
1660 ki->kaio_count++;
1661 if (lj)
1662 lj->lioj_count++;
1663 TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist);
1664 TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist);
1665 if (opcode == LIO_SYNC) {
1666 TAILQ_FOREACH(cb, &ki->kaio_jobqueue, plist) {
1667 if (cb->fd_file == aiocbe->fd_file &&
1668 cb->uaiocb.aio_lio_opcode != LIO_SYNC &&
1669 cb->seqno < aiocbe->seqno) {
1670 cb->jobflags |= AIOCBLIST_CHECKSYNC;
1671 aiocbe->pending++;
1672 }
1673 }
1674 TAILQ_FOREACH(cb, &ki->kaio_bufqueue, plist) {
1675 if (cb->fd_file == aiocbe->fd_file &&
1676 cb->uaiocb.aio_lio_opcode != LIO_SYNC &&
1677 cb->seqno < aiocbe->seqno) {
1678 cb->jobflags |= AIOCBLIST_CHECKSYNC;
1679 aiocbe->pending++;
1680 }
1681 }
1682 if (aiocbe->pending != 0) {
1683 TAILQ_INSERT_TAIL(&ki->kaio_syncqueue, aiocbe, list);
1684 aiocbe->jobstate = JOBST_JOBQSYNC;
1685 AIO_UNLOCK(ki);
1686 goto done;
1687 }
1688 }
1689 mtx_lock(&aio_job_mtx);
1690 TAILQ_INSERT_TAIL(&aio_jobs, aiocbe, list);
1691 aiocbe->jobstate = JOBST_JOBQGLOBAL;
1692 aio_kick_nowait(p);
1693 mtx_unlock(&aio_job_mtx);
1694 AIO_UNLOCK(ki);
1695 error = 0;
1696done:
1697 return (error);
1698}
1699
1700static void
1701aio_kick_nowait(struct proc *userp)
1702{
1703 struct kaioinfo *ki = userp->p_aioinfo;
1704 struct aiothreadlist *aiop;
1705
1706 mtx_assert(&aio_job_mtx, MA_OWNED);
1707 if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) {
1708 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1709 aiop->aiothreadflags &= ~AIOP_FREE;
1710 wakeup(aiop->aiothread);
1711 } else if (((num_aio_resv_start + num_aio_procs) < max_aio_procs) &&
1712 ((ki->kaio_active_count + num_aio_resv_start) <
1713 ki->kaio_maxactive_count)) {
1714 taskqueue_enqueue(taskqueue_aiod_bio, &ki->kaio_task);
1715 }
1716}
1717
1718static int
1719aio_kick(struct proc *userp)
1720{
1721 struct kaioinfo *ki = userp->p_aioinfo;
1722 struct aiothreadlist *aiop;
1723 int error, ret = 0;
1724
1725 mtx_assert(&aio_job_mtx, MA_OWNED);
1726retryproc:
1727 if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) {
1728 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1729 aiop->aiothreadflags &= ~AIOP_FREE;
1730 wakeup(aiop->aiothread);
1731 } else if (((num_aio_resv_start + num_aio_procs) < max_aio_procs) &&
1732 ((ki->kaio_active_count + num_aio_resv_start) <
1733 ki->kaio_maxactive_count)) {
1734 num_aio_resv_start++;
1735 mtx_unlock(&aio_job_mtx);
1736 error = aio_newproc(&num_aio_resv_start);
1737 mtx_lock(&aio_job_mtx);
1738 if (error) {
1739 num_aio_resv_start--;
1740 goto retryproc;
1741 }
1742 } else {
1743 ret = -1;
1744 }
1745 return (ret);
1746}
1747
1748static void
1749aio_kick_helper(void *context, int pending)
1750{
1751 struct proc *userp = context;
1752
1753 mtx_lock(&aio_job_mtx);
1754 while (--pending >= 0) {
1755 if (aio_kick(userp))
1756 break;
1757 }
1758 mtx_unlock(&aio_job_mtx);
1759}
1760
1761/*
1762 * Support the aio_return system call, as a side-effect, kernel resources are
1763 * released.
1764 */
1765static int
1766kern_aio_return(struct thread *td, struct aiocb *uaiocb, struct aiocb_ops *ops)
1767{
1768 struct proc *p = td->td_proc;
1769 struct aiocblist *cb;
1770 struct kaioinfo *ki;
1771 int status, error;
1772
1773 ki = p->p_aioinfo;
1774 if (ki == NULL)
1775 return (EINVAL);
1776 AIO_LOCK(ki);
1777 TAILQ_FOREACH(cb, &ki->kaio_done, plist) {
1778 if (cb->uuaiocb == uaiocb)
1779 break;
1780 }
1781 if (cb != NULL) {
1782 MPASS(cb->jobstate == JOBST_JOBFINISHED);
1783 status = cb->uaiocb._aiocb_private.status;
1784 error = cb->uaiocb._aiocb_private.error;
1785 td->td_retval[0] = status;
1786 if (cb->uaiocb.aio_lio_opcode == LIO_WRITE) {
1787 td->td_ru.ru_oublock += cb->outputcharge;
1788 cb->outputcharge = 0;
1789 } else if (cb->uaiocb.aio_lio_opcode == LIO_READ) {
1790 td->td_ru.ru_inblock += cb->inputcharge;
1791 cb->inputcharge = 0;
1792 }
1793 aio_free_entry(cb);
1794 AIO_UNLOCK(ki);
1795 ops->store_error(uaiocb, error);
1796 ops->store_status(uaiocb, status);
1797 } else {
1798 error = EINVAL;
1799 AIO_UNLOCK(ki);
1800 }
1801 return (error);
1802}
1803
1804int
1805aio_return(struct thread *td, struct aio_return_args *uap)
1806{
1807
1808 return (kern_aio_return(td, uap->aiocbp, &aiocb_ops));
1809}
1810
1811/*
1812 * Allow a process to wakeup when any of the I/O requests are completed.
1813 */
1814static int
1815kern_aio_suspend(struct thread *td, int njoblist, struct aiocb **ujoblist,
1816 struct timespec *ts)
1817{
1818 struct proc *p = td->td_proc;
1819 struct timeval atv;
1820 struct kaioinfo *ki;
1821 struct aiocblist *cb, *cbfirst;
1822 int error, i, timo;
1823
1824 timo = 0;
1825 if (ts) {
1826 if (ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
1827 return (EINVAL);
1828
1829 TIMESPEC_TO_TIMEVAL(&atv, ts);
1830 if (itimerfix(&atv))
1831 return (EINVAL);
1832 timo = tvtohz(&atv);
1833 }
1834
1835 ki = p->p_aioinfo;
1836 if (ki == NULL)
1837 return (EAGAIN);
1838
1839 if (njoblist == 0)
1840 return (0);
1841
1842 AIO_LOCK(ki);
1843 for (;;) {
1844 cbfirst = NULL;
1845 error = 0;
1846 TAILQ_FOREACH(cb, &ki->kaio_all, allist) {
1847 for (i = 0; i < njoblist; i++) {
1848 if (cb->uuaiocb == ujoblist[i]) {
1849 if (cbfirst == NULL)
1850 cbfirst = cb;
1851 if (cb->jobstate == JOBST_JOBFINISHED)
1852 goto RETURN;
1853 }
1854 }
1855 }
1856 /* All tasks were finished. */
1857 if (cbfirst == NULL)
1858 break;
1859
1860 ki->kaio_flags |= KAIO_WAKEUP;
1861 error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH,
1862 "aiospn", timo);
1863 if (error == ERESTART)
1864 error = EINTR;
1865 if (error)
1866 break;
1867 }
1868RETURN:
1869 AIO_UNLOCK(ki);
1870 return (error);
1871}
1872
1873int
1874aio_suspend(struct thread *td, struct aio_suspend_args *uap)
1875{
1876 struct timespec ts, *tsp;
1877 struct aiocb **ujoblist;
1878 int error;
1879
1880 if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX)
1881 return (EINVAL);
1882
1883 if (uap->timeout) {
1884 /* Get timespec struct. */
1885 if ((error = copyin(uap->timeout, &ts, sizeof(ts))) != 0)
1886 return (error);
1887 tsp = &ts;
1888 } else
1889 tsp = NULL;
1890
1891 ujoblist = uma_zalloc(aiol_zone, M_WAITOK);
1892 error = copyin(uap->aiocbp, ujoblist, uap->nent * sizeof(ujoblist[0]));
1893 if (error == 0)
1894 error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);
1895 uma_zfree(aiol_zone, ujoblist);
1896 return (error);
1897}
1898
1899/*
1900 * aio_cancel cancels any non-physio aio operations not currently in
1901 * progress.
1902 */
1903int
1904aio_cancel(struct thread *td, struct aio_cancel_args *uap)
1905{
1906 struct proc *p = td->td_proc;
1907 struct kaioinfo *ki;
1908 struct aiocblist *cbe, *cbn;
1909 struct file *fp;
1910 struct socket *so;
1911 int error;
1912 int remove;
1913 int cancelled = 0;
1914 int notcancelled = 0;
1915 struct vnode *vp;
1916
1917 /* Lookup file object. */
1918 error = fget(td, uap->fd, &fp);
1919 if (error)
1920 return (error);
1921
1922 ki = p->p_aioinfo;
1923 if (ki == NULL)
1924 goto done;
1925
1926 if (fp->f_type == DTYPE_VNODE) {
1927 vp = fp->f_vnode;
1928 if (vn_isdisk(vp, &error)) {
1929 fdrop(fp, td);
1930 td->td_retval[0] = AIO_NOTCANCELED;
1931 return (0);
1932 }
1933 }
1934
1935 AIO_LOCK(ki);
1936 TAILQ_FOREACH_SAFE(cbe, &ki->kaio_jobqueue, plist, cbn) {
1937 if ((uap->fd == cbe->uaiocb.aio_fildes) &&
1938 ((uap->aiocbp == NULL) ||
1939 (uap->aiocbp == cbe->uuaiocb))) {
1940 remove = 0;
1941
1942 mtx_lock(&aio_job_mtx);
1943 if (cbe->jobstate == JOBST_JOBQGLOBAL) {
1944 TAILQ_REMOVE(&aio_jobs, cbe, list);
1945 remove = 1;
1946 } else if (cbe->jobstate == JOBST_JOBQSOCK) {
1947 MPASS(fp->f_type == DTYPE_SOCKET);
1948 so = fp->f_data;
1949 TAILQ_REMOVE(&so->so_aiojobq, cbe, list);
1950 remove = 1;
1951 } else if (cbe->jobstate == JOBST_JOBQSYNC) {
1952 TAILQ_REMOVE(&ki->kaio_syncqueue, cbe, list);
1953 remove = 1;
1954 }
1955 mtx_unlock(&aio_job_mtx);
1956
1957 if (remove) {
1958 TAILQ_REMOVE(&ki->kaio_jobqueue, cbe, plist);
1959 cbe->uaiocb._aiocb_private.status = -1;
1960 cbe->uaiocb._aiocb_private.error = ECANCELED;
1961 aio_bio_done_notify(p, cbe, DONE_QUEUE);
1962 cancelled++;
1963 } else {
1964 notcancelled++;
1965 }
1966 if (uap->aiocbp != NULL)
1967 break;
1968 }
1969 }
1970 AIO_UNLOCK(ki);
1971
1972done:
1973 fdrop(fp, td);
1974
1975 if (uap->aiocbp != NULL) {
1976 if (cancelled) {
1977 td->td_retval[0] = AIO_CANCELED;
1978 return (0);
1979 }
1980 }
1981
1982 if (notcancelled) {
1983 td->td_retval[0] = AIO_NOTCANCELED;
1984 return (0);
1985 }
1986
1987 if (cancelled) {
1988 td->td_retval[0] = AIO_CANCELED;
1989 return (0);
1990 }
1991
1992 td->td_retval[0] = AIO_ALLDONE;
1993
1994 return (0);
1995}
1996
1997/*
1998 * aio_error is implemented in the kernel level for compatibility purposes
1999 * only. For a user mode async implementation, it would be best to do it in
2000 * a userland subroutine.
2001 */
2002static int
2003kern_aio_error(struct thread *td, struct aiocb *aiocbp, struct aiocb_ops *ops)
2004{
2005 struct proc *p = td->td_proc;
2006 struct aiocblist *cb;
2007 struct kaioinfo *ki;
2008 int status;
2009
2010 ki = p->p_aioinfo;
2011 if (ki == NULL) {
2012 td->td_retval[0] = EINVAL;
2013 return (0);
2014 }
2015
2016 AIO_LOCK(ki);
2017 TAILQ_FOREACH(cb, &ki->kaio_all, allist) {
2018 if (cb->uuaiocb == aiocbp) {
2019 if (cb->jobstate == JOBST_JOBFINISHED)
2020 td->td_retval[0] =
2021 cb->uaiocb._aiocb_private.error;
2022 else
2023 td->td_retval[0] = EINPROGRESS;
2024 AIO_UNLOCK(ki);
2025 return (0);
2026 }
2027 }
2028 AIO_UNLOCK(ki);
2029
2030 /*
2031 * Hack for failure of aio_aqueue.
2032 */
2033 status = ops->fetch_status(aiocbp);
2034 if (status == -1) {
2035 td->td_retval[0] = ops->fetch_error(aiocbp);
2036 return (0);
2037 }
2038
2039 td->td_retval[0] = EINVAL;
2040 return (0);
2041}
2042
2043int
2044aio_error(struct thread *td, struct aio_error_args *uap)
2045{
2046
2047 return (kern_aio_error(td, uap->aiocbp, &aiocb_ops));
2048}
2049
2050/* syscall - asynchronous read from a file (REALTIME) */
2051int
2052oaio_read(struct thread *td, struct oaio_read_args *uap)
2053{
2054
2055 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
2056 &aiocb_ops_osigevent));
2057}
2058
2059int
2060aio_read(struct thread *td, struct aio_read_args *uap)
2061{
2062
2063 return (aio_aqueue(td, uap->aiocbp, NULL, LIO_READ, &aiocb_ops));
2064}
2065
2066/* syscall - asynchronous write to a file (REALTIME) */
2067int
2068oaio_write(struct thread *td, struct oaio_write_args *uap)
2069{
2070
2071 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
2072 &aiocb_ops_osigevent));
2073}
2074
2075int
2076aio_write(struct thread *td, struct aio_write_args *uap)
2077{
2078
2079 return (aio_aqueue(td, uap->aiocbp, NULL, LIO_WRITE, &aiocb_ops));
2080}
2081
2082static int
2083kern_lio_listio(struct thread *td, int mode, struct aiocb * const *uacb_list,
2084 struct aiocb **acb_list, int nent, struct sigevent *sig,
2085 struct aiocb_ops *ops)
2086{
2087 struct proc *p = td->td_proc;
2088 struct aiocb *iocb;
2089 struct kaioinfo *ki;
2090 struct aioliojob *lj;
2091 struct kevent kev;
2092 int error;
2093 int nerror;
2094 int i;
2095
2096 if ((mode != LIO_NOWAIT) && (mode != LIO_WAIT))
2097 return (EINVAL);
2098
2099 if (nent < 0 || nent > AIO_LISTIO_MAX)
2100 return (EINVAL);
2101
2102 if (p->p_aioinfo == NULL)
2103 aio_init_aioinfo(p);
2104
2105 ki = p->p_aioinfo;
2106
2107 lj = uma_zalloc(aiolio_zone, M_WAITOK);
2108 lj->lioj_flags = 0;
2109 lj->lioj_count = 0;
2110 lj->lioj_finished_count = 0;
2111 knlist_init(&lj->klist, AIO_MTX(ki), NULL, NULL, NULL);
2112 ksiginfo_init(&lj->lioj_ksi);
2113
2114 /*
2115 * Setup signal.
2116 */
2117 if (sig && (mode == LIO_NOWAIT)) {
2118 bcopy(sig, &lj->lioj_signal, sizeof(lj->lioj_signal));
2119 if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
2120 /* Assume only new style KEVENT */
2121 kev.filter = EVFILT_LIO;
2122 kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1;
2123 kev.ident = (uintptr_t)uacb_list; /* something unique */
2124 kev.data = (intptr_t)lj;
2125 /* pass user defined sigval data */
2126 kev.udata = lj->lioj_signal.sigev_value.sival_ptr;
2127 error = kqfd_register(
2128 lj->lioj_signal.sigev_notify_kqueue, &kev, td, 1);
2129 if (error) {
2130 uma_zfree(aiolio_zone, lj);
2131 return (error);
2132 }
2133 } else if (lj->lioj_signal.sigev_notify == SIGEV_NONE) {
2134 ;
2135 } else if (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
2136 lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID) {
2137 if (!_SIG_VALID(lj->lioj_signal.sigev_signo)) {
2138 uma_zfree(aiolio_zone, lj);
2139 return EINVAL;
2140 }
2141 lj->lioj_flags |= LIOJ_SIGNAL;
2142 } else {
2143 uma_zfree(aiolio_zone, lj);
2144 return EINVAL;
2145 }
2146 }
2147
2148 AIO_LOCK(ki);
2149 TAILQ_INSERT_TAIL(&ki->kaio_liojoblist, lj, lioj_list);
2150 /*
2151 * Add extra aiocb count to avoid the lio to be freed
2152 * by other threads doing aio_waitcomplete or aio_return,
2153 * and prevent event from being sent until we have queued
2154 * all tasks.
2155 */
2156 lj->lioj_count = 1;
2157 AIO_UNLOCK(ki);
2158
2159 /*
2160 * Get pointers to the list of I/O requests.
2161 */
2162 nerror = 0;
2163 for (i = 0; i < nent; i++) {
2164 iocb = acb_list[i];
2165 if (iocb != NULL) {
2166 error = aio_aqueue(td, iocb, lj, LIO_NOP, ops);
2167 if (error != 0)
2168 nerror++;
2169 }
2170 }
2171
2172 error = 0;
2173 AIO_LOCK(ki);
2174 if (mode == LIO_WAIT) {
2175 while (lj->lioj_count - 1 != lj->lioj_finished_count) {
2176 ki->kaio_flags |= KAIO_WAKEUP;
2177 error = msleep(&p->p_aioinfo, AIO_MTX(ki),
2178 PRIBIO | PCATCH, "aiospn", 0);
2179 if (error == ERESTART)
2180 error = EINTR;
2181 if (error)
2182 break;
2183 }
2184 } else {
2185 if (lj->lioj_count - 1 == lj->lioj_finished_count) {
2186 if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
2187 lj->lioj_flags |= LIOJ_KEVENT_POSTED;
2188 KNOTE_LOCKED(&lj->klist, 1);
2189 }
2190 if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED))
2191 == LIOJ_SIGNAL
2192 && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
2193 lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) {
2194 aio_sendsig(p, &lj->lioj_signal,
2195 &lj->lioj_ksi);
2196 lj->lioj_flags |= LIOJ_SIGNAL_POSTED;
2197 }
2198 }
2199 }
2200 lj->lioj_count--;
2201 if (lj->lioj_count == 0) {
2202 TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
2203 knlist_delete(&lj->klist, curthread, 1);
2204 PROC_LOCK(p);
2205 sigqueue_take(&lj->lioj_ksi);
2206 PROC_UNLOCK(p);
2207 AIO_UNLOCK(ki);
2208 uma_zfree(aiolio_zone, lj);
2209 } else
2210 AIO_UNLOCK(ki);
2211
2212 if (nerror)
2213 return (EIO);
2214 return (error);
2215}
2216
2217/* syscall - list directed I/O (REALTIME) */
2218int
2219olio_listio(struct thread *td, struct olio_listio_args *uap)
2220{
2221 struct aiocb **acb_list;
2222 struct sigevent *sigp, sig;
2223 struct osigevent osig;
2224 int error, nent;
2225
2226 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2227 return (EINVAL);
2228
2229 nent = uap->nent;
2230 if (nent < 0 || nent > AIO_LISTIO_MAX)
2231 return (EINVAL);
2232
2233 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2234 error = copyin(uap->sig, &osig, sizeof(osig));
2235 if (error)
2236 return (error);
2237 error = convert_old_sigevent(&osig, &sig);
2238 if (error)
2239 return (error);
2240 sigp = &sig;
2241 } else
2242 sigp = NULL;
2243
2244 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2245 error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0]));
2246 if (error == 0)
2247 error = kern_lio_listio(td, uap->mode,
2248 (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
2249 &aiocb_ops_osigevent);
2250 free(acb_list, M_LIO);
2251 return (error);
2252}
2253
2254/* syscall - list directed I/O (REALTIME) */
2255int
2256lio_listio(struct thread *td, struct lio_listio_args *uap)
2257{
2258 struct aiocb **acb_list;
2259 struct sigevent *sigp, sig;
2260 int error, nent;
2261
2262 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2263 return (EINVAL);
2264
2265 nent = uap->nent;
2266 if (nent < 0 || nent > AIO_LISTIO_MAX)
2267 return (EINVAL);
2268
2269 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2270 error = copyin(uap->sig, &sig, sizeof(sig));
2271 if (error)
2272 return (error);
2273 sigp = &sig;
2274 } else
2275 sigp = NULL;
2276
2277 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2278 error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0]));
2279 if (error == 0)
2280 error = kern_lio_listio(td, uap->mode, uap->acb_list, acb_list,
2281 nent, sigp, &aiocb_ops);
2282 free(acb_list, M_LIO);
2283 return (error);
2284}
2285
2286/*
2287 * Called from interrupt thread for physio, we should return as fast
2288 * as possible, so we schedule a biohelper task.
2289 */
2290static void
2291aio_physwakeup(struct buf *bp)
2292{
2293 struct aiocblist *aiocbe;
2294
2295 aiocbe = (struct aiocblist *)bp->b_caller1;
2296 taskqueue_enqueue(taskqueue_aiod_bio, &aiocbe->biotask);
2297}
2298
2299/*
2300 * Task routine to perform heavy tasks, process wakeup, and signals.
2301 */
2302static void
2303biohelper(void *context, int pending)
2304{
2305 struct aiocblist *aiocbe = context;
2306 struct buf *bp;
2307 struct proc *userp;
2308 struct kaioinfo *ki;
2309 int nblks;
2310
2311 bp = aiocbe->bp;
2312 userp = aiocbe->userproc;
2313 ki = userp->p_aioinfo;
2314 AIO_LOCK(ki);
2315 aiocbe->uaiocb._aiocb_private.status -= bp->b_resid;
2316 aiocbe->uaiocb._aiocb_private.error = 0;
2317 if (bp->b_ioflags & BIO_ERROR)
2318 aiocbe->uaiocb._aiocb_private.error = bp->b_error;
2319 nblks = btodb(aiocbe->uaiocb.aio_nbytes);
2320 if (aiocbe->uaiocb.aio_lio_opcode == LIO_WRITE)
2321 aiocbe->outputcharge += nblks;
2322 else
2323 aiocbe->inputcharge += nblks;
2324 aiocbe->bp = NULL;
2325 TAILQ_REMOVE(&userp->p_aioinfo->kaio_bufqueue, aiocbe, plist);
2326 ki->kaio_buffer_count--;
2327 aio_bio_done_notify(userp, aiocbe, DONE_BUF);
2328 AIO_UNLOCK(ki);
2329
2330 /* Release mapping into kernel space. */
2331 vunmapbuf(bp);
2332 relpbuf(bp, NULL);
2333 atomic_subtract_int(&num_buf_aio, 1);
2334}
2335
2336/* syscall - wait for the next completion of an aio request */
2337static int
2338kern_aio_waitcomplete(struct thread *td, struct aiocb **aiocbp,
2339 struct timespec *ts, struct aiocb_ops *ops)
2340{
2341 struct proc *p = td->td_proc;
2342 struct timeval atv;
2343 struct kaioinfo *ki;
2344 struct aiocblist *cb;
2345 struct aiocb *uuaiocb;
2346 int error, status, timo;
2347
2348 ops->store_aiocb(aiocbp, NULL);
2349
2350 timo = 0;
2351 if (ts) {
2352 if ((ts->tv_nsec < 0) || (ts->tv_nsec >= 1000000000))
2353 return (EINVAL);
2354
2355 TIMESPEC_TO_TIMEVAL(&atv, ts);
2356 if (itimerfix(&atv))
2357 return (EINVAL);
2358 timo = tvtohz(&atv);
2359 }
2360
2361 if (p->p_aioinfo == NULL)
2362 aio_init_aioinfo(p);
2363 ki = p->p_aioinfo;
2364
2365 error = 0;
2366 cb = NULL;
2367 AIO_LOCK(ki);
2368 while ((cb = TAILQ_FIRST(&ki->kaio_done)) == NULL) {
2369 ki->kaio_flags |= KAIO_WAKEUP;
2370 error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH,
2371 "aiowc", timo);
2372 if (timo && error == ERESTART)
2373 error = EINTR;
2374 if (error)
2375 break;
2376 }
2377
2378 if (cb != NULL) {
2379 MPASS(cb->jobstate == JOBST_JOBFINISHED);
2380 uuaiocb = cb->uuaiocb;
2381 status = cb->uaiocb._aiocb_private.status;
2382 error = cb->uaiocb._aiocb_private.error;
2383 td->td_retval[0] = status;
2384 if (cb->uaiocb.aio_lio_opcode == LIO_WRITE) {
2385 td->td_ru.ru_oublock += cb->outputcharge;
2386 cb->outputcharge = 0;
2387 } else if (cb->uaiocb.aio_lio_opcode == LIO_READ) {
2388 td->td_ru.ru_inblock += cb->inputcharge;
2389 cb->inputcharge = 0;
2390 }
2391 aio_free_entry(cb);
2392 AIO_UNLOCK(ki);
2393 ops->store_aiocb(aiocbp, uuaiocb);
2394 ops->store_error(uuaiocb, error);
2395 ops->store_status(uuaiocb, status);
2396 } else
2397 AIO_UNLOCK(ki);
2398
2399 return (error);
2400}
2401
2402int
2403aio_waitcomplete(struct thread *td, struct aio_waitcomplete_args *uap)
2404{
2405 struct timespec ts, *tsp;
2406 int error;
2407
2408 if (uap->timeout) {
2409 /* Get timespec struct. */
2410 error = copyin(uap->timeout, &ts, sizeof(ts));
2411 if (error)
2412 return (error);
2413 tsp = &ts;
2414 } else
2415 tsp = NULL;
2416
2417 return (kern_aio_waitcomplete(td, uap->aiocbp, tsp, &aiocb_ops));
2418}
2419
2420static int
2421kern_aio_fsync(struct thread *td, int op, struct aiocb *aiocbp,
2422 struct aiocb_ops *ops)
2423{
2424 struct proc *p = td->td_proc;
2425 struct kaioinfo *ki;
2426
2427 if (op != O_SYNC) /* XXX lack of O_DSYNC */
2428 return (EINVAL);
2429 ki = p->p_aioinfo;
2430 if (ki == NULL)
2431 aio_init_aioinfo(p);
2432 return (aio_aqueue(td, aiocbp, NULL, LIO_SYNC, ops));
2433}
2434
2435int
2436aio_fsync(struct thread *td, struct aio_fsync_args *uap)
2437{
2438
2439 return (kern_aio_fsync(td, uap->op, uap->aiocbp, &aiocb_ops));
2440}
2441
2442/* kqueue attach function */
2443static int
2444filt_aioattach(struct knote *kn)
2445{
2446 struct aiocblist *aiocbe = (struct aiocblist *)kn->kn_sdata;
2447
2448 /*
2449 * The aiocbe pointer must be validated before using it, so
2450 * registration is restricted to the kernel; the user cannot
2451 * set EV_FLAG1.
2452 */
2453 if ((kn->kn_flags & EV_FLAG1) == 0)
2454 return (EPERM);
2455 kn->kn_ptr.p_aio = aiocbe;
2456 kn->kn_flags &= ~EV_FLAG1;
2457
2458 knlist_add(&aiocbe->klist, kn, 0);
2459
2460 return (0);
2461}
2462
2463/* kqueue detach function */
2464static void
2465filt_aiodetach(struct knote *kn)
2466{
2467 struct aiocblist *aiocbe = kn->kn_ptr.p_aio;
2468
2469 if (!knlist_empty(&aiocbe->klist))
2470 knlist_remove(&aiocbe->klist, kn, 0);
2471}
2472
2473/* kqueue filter function */
2474/*ARGSUSED*/
2475static int
2476filt_aio(struct knote *kn, long hint)
2477{
2478 struct aiocblist *aiocbe = kn->kn_ptr.p_aio;
2479
2480 kn->kn_data = aiocbe->uaiocb._aiocb_private.error;
2481 if (aiocbe->jobstate != JOBST_JOBFINISHED)
2482 return (0);
2483 kn->kn_flags |= EV_EOF;
2484 return (1);
2485}
2486
2487/* kqueue attach function */
2488static int
2489filt_lioattach(struct knote *kn)
2490{
2491 struct aioliojob * lj = (struct aioliojob *)kn->kn_sdata;
2492
2493 /*
2494 * The aioliojob pointer must be validated before using it, so
2495 * registration is restricted to the kernel; the user cannot
2496 * set EV_FLAG1.
2497 */
2498 if ((kn->kn_flags & EV_FLAG1) == 0)
2499 return (EPERM);
2500 kn->kn_ptr.p_lio = lj;
2501 kn->kn_flags &= ~EV_FLAG1;
2502
2503 knlist_add(&lj->klist, kn, 0);
2504
2505 return (0);
2506}
2507
2508/* kqueue detach function */
2509static void
2510filt_liodetach(struct knote *kn)
2511{
2512 struct aioliojob * lj = kn->kn_ptr.p_lio;
2513
2514 if (!knlist_empty(&lj->klist))
2515 knlist_remove(&lj->klist, kn, 0);
2516}
2517
2518/* kqueue filter function */
2519/*ARGSUSED*/
2520static int
2521filt_lio(struct knote *kn, long hint)
2522{
2523 struct aioliojob * lj = kn->kn_ptr.p_lio;
2524
2525 return (lj->lioj_flags & LIOJ_KEVENT_POSTED);
2526}
2527
2528#ifdef COMPAT_IA32
2529#include <sys/mount.h>
2530#include <sys/socket.h>
2531#include <compat/freebsd32/freebsd32.h>
2532#include <compat/freebsd32/freebsd32_proto.h>
2533#include <compat/freebsd32/freebsd32_signal.h>
2534#include <compat/freebsd32/freebsd32_syscall.h>
2535#include <compat/freebsd32/freebsd32_util.h>
2536
2537struct __aiocb_private32 {
2538 int32_t status;
2539 int32_t error;
2540 uint32_t kernelinfo;
2541};
2542
2543typedef struct oaiocb32 {
2544 int aio_fildes; /* File descriptor */
2545 uint64_t aio_offset __packed; /* File offset for I/O */
2546 uint32_t aio_buf; /* I/O buffer in process space */
2547 uint32_t aio_nbytes; /* Number of bytes for I/O */
2548 struct osigevent32 aio_sigevent; /* Signal to deliver */
2549 int aio_lio_opcode; /* LIO opcode */
2550 int aio_reqprio; /* Request priority -- ignored */
2551 struct __aiocb_private32 _aiocb_private;
2552} oaiocb32_t;
2553
2554typedef struct aiocb32 {
2555 int32_t aio_fildes; /* File descriptor */
2556 uint64_t aio_offset __packed; /* File offset for I/O */
2557 uint32_t aio_buf; /* I/O buffer in process space */
2558 uint32_t aio_nbytes; /* Number of bytes for I/O */
2559 int __spare__[2];
2560 uint32_t __spare2__;
2561 int aio_lio_opcode; /* LIO opcode */
2562 int aio_reqprio; /* Request priority -- ignored */
2563 struct __aiocb_private32 _aiocb_private;
2564 struct sigevent32 aio_sigevent; /* Signal to deliver */
2565} aiocb32_t;
2566
2567static int
2568convert_old_sigevent32(struct osigevent32 *osig, struct sigevent *nsig)
2569{
2570
2571 /*
2572 * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are
2573 * supported by AIO with the old sigevent structure.
2574 */
2575 CP(*osig, *nsig, sigev_notify);
2576 switch (nsig->sigev_notify) {
2577 case SIGEV_NONE:
2578 break;
2579 case SIGEV_SIGNAL:
2580 nsig->sigev_signo = osig->__sigev_u.__sigev_signo;
2581 break;
2582 case SIGEV_KEVENT:
2583 nsig->sigev_notify_kqueue =
2584 osig->__sigev_u.__sigev_notify_kqueue;
2585 PTRIN_CP(*osig, *nsig, sigev_value.sival_ptr);
2586 break;
2587 default:
2588 return (EINVAL);
2589 }
2590 return (0);
2591}
2592
2593static int
2594aiocb32_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
2595{
2596 struct oaiocb32 job32;
2597 int error;
2598
2599 bzero(kjob, sizeof(struct aiocb));
2600 error = copyin(ujob, &job32, sizeof(job32));
2601 if (error)
2602 return (error);
2603
2604 CP(job32, *kjob, aio_fildes);
2605 CP(job32, *kjob, aio_offset);
2606 PTRIN_CP(job32, *kjob, aio_buf);
2607 CP(job32, *kjob, aio_nbytes);
2608 CP(job32, *kjob, aio_lio_opcode);
2609 CP(job32, *kjob, aio_reqprio);
2610 CP(job32, *kjob, _aiocb_private.status);
2611 CP(job32, *kjob, _aiocb_private.error);
2612 PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo);
2613 return (convert_old_sigevent32(&job32.aio_sigevent,
2614 &kjob->aio_sigevent));
2615}
2616
2617static int
2618convert_sigevent32(struct sigevent32 *sig32, struct sigevent *sig)
2619{
2620
2621 CP(*sig32, *sig, sigev_notify);
2622 switch (sig->sigev_notify) {
2623 case SIGEV_NONE:
2624 break;
2625 case SIGEV_THREAD_ID:
2626 CP(*sig32, *sig, sigev_notify_thread_id);
2627 /* FALLTHROUGH */
2628 case SIGEV_SIGNAL:
2629 CP(*sig32, *sig, sigev_signo);
2630 break;
2631 case SIGEV_KEVENT:
2632 CP(*sig32, *sig, sigev_notify_kqueue);
2633 PTRIN_CP(*sig32, *sig, sigev_value.sival_ptr);
2634 break;
2635 default:
2636 return (EINVAL);
2637 }
2638 return (0);
2639}
2640
2641static int
2642aiocb32_copyin(struct aiocb *ujob, struct aiocb *kjob)
2643{
2644 struct aiocb32 job32;
2645 int error;
2646
2647 error = copyin(ujob, &job32, sizeof(job32));
2648 if (error)
2649 return (error);
2650 CP(job32, *kjob, aio_fildes);
2651 CP(job32, *kjob, aio_offset);
2652 PTRIN_CP(job32, *kjob, aio_buf);
2653 CP(job32, *kjob, aio_nbytes);
2654 CP(job32, *kjob, aio_lio_opcode);
2655 CP(job32, *kjob, aio_reqprio);
2656 CP(job32, *kjob, _aiocb_private.status);
2657 CP(job32, *kjob, _aiocb_private.error);
2658 PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo);
2659 return (convert_sigevent32(&job32.aio_sigevent, &kjob->aio_sigevent));
2660}
2661
2662static long
2663aiocb32_fetch_status(struct aiocb *ujob)
2664{
2665 struct aiocb32 *ujob32;
2666
2667 ujob32 = (struct aiocb32 *)ujob;
2668 return (fuword32(&ujob32->_aiocb_private.status));
2669}
2670
2671static long
2672aiocb32_fetch_error(struct aiocb *ujob)
2673{
2674 struct aiocb32 *ujob32;
2675
2676 ujob32 = (struct aiocb32 *)ujob;
2677 return (fuword32(&ujob32->_aiocb_private.error));
2678}
2679
2680static int
2681aiocb32_store_status(struct aiocb *ujob, long status)
2682{
2683 struct aiocb32 *ujob32;
2684
2685 ujob32 = (struct aiocb32 *)ujob;
2686 return (suword32(&ujob32->_aiocb_private.status, status));
2687}
2688
2689static int
2690aiocb32_store_error(struct aiocb *ujob, long error)
2691{
2692 struct aiocb32 *ujob32;
2693
2694 ujob32 = (struct aiocb32 *)ujob;
2695 return (suword32(&ujob32->_aiocb_private.error, error));
2696}
2697
2698static int
2699aiocb32_store_kernelinfo(struct aiocb *ujob, long jobref)
2700{
2701 struct aiocb32 *ujob32;
2702
2703 ujob32 = (struct aiocb32 *)ujob;
2704 return (suword32(&ujob32->_aiocb_private.kernelinfo, jobref));
2705}
2706
2707static int
2708aiocb32_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob)
2709{
2710
2711 return (suword32(ujobp, (long)ujob));
2712}
2713
2714static struct aiocb_ops aiocb32_ops = {
2715 .copyin = aiocb32_copyin,
2716 .fetch_status = aiocb32_fetch_status,
2717 .fetch_error = aiocb32_fetch_error,
2718 .store_status = aiocb32_store_status,
2719 .store_error = aiocb32_store_error,
2720 .store_kernelinfo = aiocb32_store_kernelinfo,
2721 .store_aiocb = aiocb32_store_aiocb,
2722};
2723
2724static struct aiocb_ops aiocb32_ops_osigevent = {
2725 .copyin = aiocb32_copyin_old_sigevent,
2726 .fetch_status = aiocb32_fetch_status,
2727 .fetch_error = aiocb32_fetch_error,
2728 .store_status = aiocb32_store_status,
2729 .store_error = aiocb32_store_error,
2730 .store_kernelinfo = aiocb32_store_kernelinfo,
2731 .store_aiocb = aiocb32_store_aiocb,
2732};
2733
2734int
2735freebsd32_aio_return(struct thread *td, struct freebsd32_aio_return_args *uap)
2736{
2737
2738 return (kern_aio_return(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops));
2739}
2740
2741int
2742freebsd32_aio_suspend(struct thread *td, struct freebsd32_aio_suspend_args *uap)
2743{
2744 struct timespec32 ts32;
2745 struct timespec ts, *tsp;
2746 struct aiocb **ujoblist;
2747 uint32_t *ujoblist32;
2748 int error, i;
2749
2750 if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX)
2751 return (EINVAL);
2752
2753 if (uap->timeout) {
2754 /* Get timespec struct. */
2755 if ((error = copyin(uap->timeout, &ts32, sizeof(ts32))) != 0)
2756 return (error);
2757 CP(ts32, ts, tv_sec);
2758 CP(ts32, ts, tv_nsec);
2759 tsp = &ts;
2760 } else
2761 tsp = NULL;
2762
2763 ujoblist = uma_zalloc(aiol_zone, M_WAITOK);
2764 ujoblist32 = (uint32_t *)ujoblist;
2765 error = copyin(uap->aiocbp, ujoblist32, uap->nent *
2766 sizeof(ujoblist32[0]));
2767 if (error == 0) {
2768 for (i = uap->nent; i > 0; i--)
2769 ujoblist[i] = PTRIN(ujoblist32[i]);
2770
2771 error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);
2772 }
2773 uma_zfree(aiol_zone, ujoblist);
2774 return (error);
2775}
2776
2777int
2778freebsd32_aio_cancel(struct thread *td, struct freebsd32_aio_cancel_args *uap)
2779{
2780
2781 return (aio_cancel(td, (struct aio_cancel_args *)uap));
2782}
2783
2784int
2785freebsd32_aio_error(struct thread *td, struct freebsd32_aio_error_args *uap)
2786{
2787
2788 return (kern_aio_error(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops));
2789}
2790
2791int
2792freebsd32_oaio_read(struct thread *td, struct freebsd32_oaio_read_args *uap)
2793{
2794
2795 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
2796 &aiocb32_ops_osigevent));
2797}
2798
2799int
2800freebsd32_aio_read(struct thread *td, struct freebsd32_aio_read_args *uap)
2801{
2802
2803 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
2804 &aiocb32_ops));
2805}
2806
2807int
2808freebsd32_oaio_write(struct thread *td, struct freebsd32_oaio_write_args *uap)
2809{
2810
2811 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
2812 &aiocb32_ops_osigevent));
2813}
2814
2815int
2816freebsd32_aio_write(struct thread *td, struct freebsd32_aio_write_args *uap)
2817{
2818
2819 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
2820 &aiocb32_ops));
2821}
2822
2823int
2824freebsd32_aio_waitcomplete(struct thread *td,
2825 struct freebsd32_aio_waitcomplete_args *uap)
2826{
2827 struct timespec32 ts32;
2828 struct timespec ts, *tsp;
2829 int error;
2830
2831 if (uap->timeout) {
2832 /* Get timespec struct. */
2833 error = copyin(uap->timeout, &ts32, sizeof(ts32));
2834 if (error)
2835 return (error);
2836 CP(ts32, ts, tv_sec);
2837 CP(ts32, ts, tv_nsec);
2838 tsp = &ts;
2839 } else
2840 tsp = NULL;
2841
2842 return (kern_aio_waitcomplete(td, (struct aiocb **)uap->aiocbp, tsp,
2843 &aiocb32_ops));
2844}
2845
2846int
2847freebsd32_aio_fsync(struct thread *td, struct freebsd32_aio_fsync_args *uap)
2848{
2849
2850 return (kern_aio_fsync(td, uap->op, (struct aiocb *)uap->aiocbp,
2851 &aiocb32_ops));
2852}
2853
2854int
2855freebsd32_olio_listio(struct thread *td, struct freebsd32_olio_listio_args *uap)
2856{
2857 struct aiocb **acb_list;
2858 struct sigevent *sigp, sig;
2859 struct osigevent32 osig;
2860 uint32_t *acb_list32;
2861 int error, i, nent;
2862
2863 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2864 return (EINVAL);
2865
2866 nent = uap->nent;
2867 if (nent < 0 || nent > AIO_LISTIO_MAX)
2868 return (EINVAL);
2869
2870 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2871 error = copyin(uap->sig, &osig, sizeof(osig));
2872 if (error)
2873 return (error);
2874 error = convert_old_sigevent32(&osig, &sig);
2875 if (error)
2876 return (error);
2877 sigp = &sig;
2878 } else
2879 sigp = NULL;
2880
2881 acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK);
2882 error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t));
2883 if (error) {
2884 free(acb_list32, M_LIO);
2885 return (error);
2886 }
2887 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2888 for (i = 0; i < nent; i++)
2889 acb_list[i] = PTRIN(acb_list32[i]);
2890 free(acb_list32, M_LIO);
2891
2892 error = kern_lio_listio(td, uap->mode,
2893 (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
2894 &aiocb32_ops_osigevent);
2895 free(acb_list, M_LIO);
2896 return (error);
2897}
2898
2899int
2900freebsd32_lio_listio(struct thread *td, struct freebsd32_lio_listio_args *uap)
2901{
2902 struct aiocb **acb_list;
2903 struct sigevent *sigp, sig;
2904 struct sigevent32 sig32;
2905 uint32_t *acb_list32;
2906 int error, i, nent;
2907
2908 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2909 return (EINVAL);
2910
2911 nent = uap->nent;
2912 if (nent < 0 || nent > AIO_LISTIO_MAX)
2913 return (EINVAL);
2914
2915 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2916 error = copyin(uap->sig, &sig32, sizeof(sig32));
2917 if (error)
2918 return (error);
2919 error = convert_sigevent32(&sig32, &sig);
2920 if (error)
2921 return (error);
2922 sigp = &sig;
2923 } else
2924 sigp = NULL;
2925
2926 acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK);
2927 error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t));
2928 if (error) {
2929 free(acb_list32, M_LIO);
2930 return (error);
2931 }
2932 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2933 for (i = 0; i < nent; i++)
2934 acb_list[i] = PTRIN(acb_list32[i]);
2935 free(acb_list32, M_LIO);
2936
2937 error = kern_lio_listio(td, uap->mode,
2938 (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
2939 &aiocb32_ops);
2940 free(acb_list, M_LIO);
2941 return (error);
2942}
2943
2944SYSCALL32_MODULE_HELPER(freebsd32_aio_return);
2945SYSCALL32_MODULE_HELPER(freebsd32_aio_suspend);
2946SYSCALL32_MODULE_HELPER(freebsd32_aio_cancel);
2947SYSCALL32_MODULE_HELPER(freebsd32_aio_error);
2948SYSCALL32_MODULE_HELPER(freebsd32_aio_fsync);
2949SYSCALL32_MODULE_HELPER(freebsd32_aio_read);
2950SYSCALL32_MODULE_HELPER(freebsd32_aio_write);
2951SYSCALL32_MODULE_HELPER(freebsd32_aio_waitcomplete);
2952SYSCALL32_MODULE_HELPER(freebsd32_lio_listio);
2953SYSCALL32_MODULE_HELPER(freebsd32_oaio_read);
2954SYSCALL32_MODULE_HELPER(freebsd32_oaio_write);
2955SYSCALL32_MODULE_HELPER(freebsd32_olio_listio);
2956#endif
| 1339}
1340
1341static int
1342convert_old_sigevent(struct osigevent *osig, struct sigevent *nsig)
1343{
1344
1345 /*
1346 * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are
1347 * supported by AIO with the old sigevent structure.
1348 */
1349 nsig->sigev_notify = osig->sigev_notify;
1350 switch (nsig->sigev_notify) {
1351 case SIGEV_NONE:
1352 break;
1353 case SIGEV_SIGNAL:
1354 nsig->sigev_signo = osig->__sigev_u.__sigev_signo;
1355 break;
1356 case SIGEV_KEVENT:
1357 nsig->sigev_notify_kqueue =
1358 osig->__sigev_u.__sigev_notify_kqueue;
1359 nsig->sigev_value.sival_ptr = osig->sigev_value.sival_ptr;
1360 break;
1361 default:
1362 return (EINVAL);
1363 }
1364 return (0);
1365}
1366
1367static int
1368aiocb_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
1369{
1370 struct oaiocb *ojob;
1371 int error;
1372
1373 bzero(kjob, sizeof(struct aiocb));
1374 error = copyin(ujob, kjob, sizeof(struct oaiocb));
1375 if (error)
1376 return (error);
1377 ojob = (struct oaiocb *)kjob;
1378 return (convert_old_sigevent(&ojob->aio_sigevent, &kjob->aio_sigevent));
1379}
1380
1381static int
1382aiocb_copyin(struct aiocb *ujob, struct aiocb *kjob)
1383{
1384
1385 return (copyin(ujob, kjob, sizeof(struct aiocb)));
1386}
1387
1388static long
1389aiocb_fetch_status(struct aiocb *ujob)
1390{
1391
1392 return (fuword(&ujob->_aiocb_private.status));
1393}
1394
1395static long
1396aiocb_fetch_error(struct aiocb *ujob)
1397{
1398
1399 return (fuword(&ujob->_aiocb_private.error));
1400}
1401
1402static int
1403aiocb_store_status(struct aiocb *ujob, long status)
1404{
1405
1406 return (suword(&ujob->_aiocb_private.status, status));
1407}
1408
1409static int
1410aiocb_store_error(struct aiocb *ujob, long error)
1411{
1412
1413 return (suword(&ujob->_aiocb_private.error, error));
1414}
1415
1416static int
1417aiocb_store_kernelinfo(struct aiocb *ujob, long jobref)
1418{
1419
1420 return (suword(&ujob->_aiocb_private.kernelinfo, jobref));
1421}
1422
1423static int
1424aiocb_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob)
1425{
1426
1427 return (suword(ujobp, (long)ujob));
1428}
1429
1430static struct aiocb_ops aiocb_ops = {
1431 .copyin = aiocb_copyin,
1432 .fetch_status = aiocb_fetch_status,
1433 .fetch_error = aiocb_fetch_error,
1434 .store_status = aiocb_store_status,
1435 .store_error = aiocb_store_error,
1436 .store_kernelinfo = aiocb_store_kernelinfo,
1437 .store_aiocb = aiocb_store_aiocb,
1438};
1439
1440static struct aiocb_ops aiocb_ops_osigevent = {
1441 .copyin = aiocb_copyin_old_sigevent,
1442 .fetch_status = aiocb_fetch_status,
1443 .fetch_error = aiocb_fetch_error,
1444 .store_status = aiocb_store_status,
1445 .store_error = aiocb_store_error,
1446 .store_kernelinfo = aiocb_store_kernelinfo,
1447 .store_aiocb = aiocb_store_aiocb,
1448};
1449
1450/*
1451 * Queue a new AIO request. Choosing either the threaded or direct physio VCHR
1452 * technique is done in this code.
1453 */
1454int
1455aio_aqueue(struct thread *td, struct aiocb *job, struct aioliojob *lj,
1456 int type, struct aiocb_ops *ops)
1457{
1458 struct proc *p = td->td_proc;
1459 struct file *fp;
1460 struct socket *so;
1461 struct aiocblist *aiocbe, *cb;
1462 struct kaioinfo *ki;
1463 struct kevent kev;
1464 struct sockbuf *sb;
1465 int opcode;
1466 int error;
1467 int fd, kqfd;
1468 int jid;
1469
1470 if (p->p_aioinfo == NULL)
1471 aio_init_aioinfo(p);
1472
1473 ki = p->p_aioinfo;
1474
1475 ops->store_status(job, -1);
1476 ops->store_error(job, 0);
1477 ops->store_kernelinfo(job, -1);
1478
1479 if (num_queue_count >= max_queue_count ||
1480 ki->kaio_count >= ki->kaio_qallowed_count) {
1481 ops->store_error(job, EAGAIN);
1482 return (EAGAIN);
1483 }
1484
1485 aiocbe = uma_zalloc(aiocb_zone, M_WAITOK | M_ZERO);
1486 aiocbe->inputcharge = 0;
1487 aiocbe->outputcharge = 0;
1488 knlist_init(&aiocbe->klist, AIO_MTX(ki), NULL, NULL, NULL);
1489
1490 error = ops->copyin(job, &aiocbe->uaiocb);
1491 if (error) {
1492 ops->store_error(job, error);
1493 uma_zfree(aiocb_zone, aiocbe);
1494 return (error);
1495 }
1496
1497 if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT &&
1498 aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_SIGNAL &&
1499 aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_THREAD_ID &&
1500 aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_NONE) {
1501 ops->store_error(job, EINVAL);
1502 uma_zfree(aiocb_zone, aiocbe);
1503 return (EINVAL);
1504 }
1505
1506 if ((aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL ||
1507 aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID) &&
1508 !_SIG_VALID(aiocbe->uaiocb.aio_sigevent.sigev_signo)) {
1509 uma_zfree(aiocb_zone, aiocbe);
1510 return (EINVAL);
1511 }
1512
1513 ksiginfo_init(&aiocbe->ksi);
1514
1515 /* Save userspace address of the job info. */
1516 aiocbe->uuaiocb = job;
1517
1518 /* Get the opcode. */
1519 if (type != LIO_NOP)
1520 aiocbe->uaiocb.aio_lio_opcode = type;
1521 opcode = aiocbe->uaiocb.aio_lio_opcode;
1522
1523 /* Fetch the file object for the specified file descriptor. */
1524 fd = aiocbe->uaiocb.aio_fildes;
1525 switch (opcode) {
1526 case LIO_WRITE:
1527 error = fget_write(td, fd, &fp);
1528 break;
1529 case LIO_READ:
1530 error = fget_read(td, fd, &fp);
1531 break;
1532 default:
1533 error = fget(td, fd, &fp);
1534 }
1535 if (error) {
1536 uma_zfree(aiocb_zone, aiocbe);
1537 ops->store_error(job, error);
1538 return (error);
1539 }
1540
1541 if (opcode == LIO_SYNC && fp->f_vnode == NULL) {
1542 error = EINVAL;
1543 goto aqueue_fail;
1544 }
1545
1546 if (opcode != LIO_SYNC && aiocbe->uaiocb.aio_offset == -1LL) {
1547 error = EINVAL;
1548 goto aqueue_fail;
1549 }
1550
1551 aiocbe->fd_file = fp;
1552
1553 mtx_lock(&aio_job_mtx);
1554 jid = jobrefid++;
1555 aiocbe->seqno = jobseqno++;
1556 mtx_unlock(&aio_job_mtx);
1557 error = ops->store_kernelinfo(job, jid);
1558 if (error) {
1559 error = EINVAL;
1560 goto aqueue_fail;
1561 }
1562 aiocbe->uaiocb._aiocb_private.kernelinfo = (void *)(intptr_t)jid;
1563
1564 if (opcode == LIO_NOP) {
1565 fdrop(fp, td);
1566 uma_zfree(aiocb_zone, aiocbe);
1567 return (0);
1568 }
1569 if ((opcode != LIO_READ) && (opcode != LIO_WRITE) &&
1570 (opcode != LIO_SYNC)) {
1571 error = EINVAL;
1572 goto aqueue_fail;
1573 }
1574
1575 if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT)
1576 goto no_kqueue;
1577 kqfd = aiocbe->uaiocb.aio_sigevent.sigev_notify_kqueue;
1578 kev.ident = (uintptr_t)aiocbe->uuaiocb;
1579 kev.filter = EVFILT_AIO;
1580 kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1;
1581 kev.data = (intptr_t)aiocbe;
1582 kev.udata = aiocbe->uaiocb.aio_sigevent.sigev_value.sival_ptr;
1583 error = kqfd_register(kqfd, &kev, td, 1);
1584aqueue_fail:
1585 if (error) {
1586 fdrop(fp, td);
1587 uma_zfree(aiocb_zone, aiocbe);
1588 ops->store_error(job, error);
1589 goto done;
1590 }
1591no_kqueue:
1592
1593 ops->store_error(job, EINPROGRESS);
1594 aiocbe->uaiocb._aiocb_private.error = EINPROGRESS;
1595 aiocbe->userproc = p;
1596 aiocbe->cred = crhold(td->td_ucred);
1597 aiocbe->jobflags = 0;
1598 aiocbe->lio = lj;
1599
1600 if (opcode == LIO_SYNC)
1601 goto queueit;
1602
1603 if (fp->f_type == DTYPE_SOCKET) {
1604 /*
1605 * Alternate queueing for socket ops: Reach down into the
1606 * descriptor to get the socket data. Then check to see if the
1607 * socket is ready to be read or written (based on the requested
1608 * operation).
1609 *
1610 * If it is not ready for io, then queue the aiocbe on the
1611 * socket, and set the flags so we get a call when sbnotify()
1612 * happens.
1613 *
1614 * Note if opcode is neither LIO_WRITE nor LIO_READ we lock
1615 * and unlock the snd sockbuf for no reason.
1616 */
1617 so = fp->f_data;
1618 sb = (opcode == LIO_READ) ? &so->so_rcv : &so->so_snd;
1619 SOCKBUF_LOCK(sb);
1620 if (((opcode == LIO_READ) && (!soreadable(so))) || ((opcode ==
1621 LIO_WRITE) && (!sowriteable(so)))) {
1622 sb->sb_flags |= SB_AIO;
1623
1624 mtx_lock(&aio_job_mtx);
1625 TAILQ_INSERT_TAIL(&so->so_aiojobq, aiocbe, list);
1626 mtx_unlock(&aio_job_mtx);
1627
1628 AIO_LOCK(ki);
1629 TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist);
1630 TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist);
1631 aiocbe->jobstate = JOBST_JOBQSOCK;
1632 ki->kaio_count++;
1633 if (lj)
1634 lj->lioj_count++;
1635 AIO_UNLOCK(ki);
1636 SOCKBUF_UNLOCK(sb);
1637 atomic_add_int(&num_queue_count, 1);
1638 error = 0;
1639 goto done;
1640 }
1641 SOCKBUF_UNLOCK(sb);
1642 }
1643
1644 if ((error = aio_qphysio(p, aiocbe)) == 0)
1645 goto done;
1646#if 0
1647 if (error > 0) {
1648 aiocbe->uaiocb._aiocb_private.error = error;
1649 ops->store_error(job, error);
1650 goto done;
1651 }
1652#endif
1653queueit:
1654 /* No buffer for daemon I/O. */
1655 aiocbe->bp = NULL;
1656 atomic_add_int(&num_queue_count, 1);
1657
1658 AIO_LOCK(ki);
1659 ki->kaio_count++;
1660 if (lj)
1661 lj->lioj_count++;
1662 TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist);
1663 TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist);
1664 if (opcode == LIO_SYNC) {
1665 TAILQ_FOREACH(cb, &ki->kaio_jobqueue, plist) {
1666 if (cb->fd_file == aiocbe->fd_file &&
1667 cb->uaiocb.aio_lio_opcode != LIO_SYNC &&
1668 cb->seqno < aiocbe->seqno) {
1669 cb->jobflags |= AIOCBLIST_CHECKSYNC;
1670 aiocbe->pending++;
1671 }
1672 }
1673 TAILQ_FOREACH(cb, &ki->kaio_bufqueue, plist) {
1674 if (cb->fd_file == aiocbe->fd_file &&
1675 cb->uaiocb.aio_lio_opcode != LIO_SYNC &&
1676 cb->seqno < aiocbe->seqno) {
1677 cb->jobflags |= AIOCBLIST_CHECKSYNC;
1678 aiocbe->pending++;
1679 }
1680 }
1681 if (aiocbe->pending != 0) {
1682 TAILQ_INSERT_TAIL(&ki->kaio_syncqueue, aiocbe, list);
1683 aiocbe->jobstate = JOBST_JOBQSYNC;
1684 AIO_UNLOCK(ki);
1685 goto done;
1686 }
1687 }
1688 mtx_lock(&aio_job_mtx);
1689 TAILQ_INSERT_TAIL(&aio_jobs, aiocbe, list);
1690 aiocbe->jobstate = JOBST_JOBQGLOBAL;
1691 aio_kick_nowait(p);
1692 mtx_unlock(&aio_job_mtx);
1693 AIO_UNLOCK(ki);
1694 error = 0;
1695done:
1696 return (error);
1697}
1698
1699static void
1700aio_kick_nowait(struct proc *userp)
1701{
1702 struct kaioinfo *ki = userp->p_aioinfo;
1703 struct aiothreadlist *aiop;
1704
1705 mtx_assert(&aio_job_mtx, MA_OWNED);
1706 if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) {
1707 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1708 aiop->aiothreadflags &= ~AIOP_FREE;
1709 wakeup(aiop->aiothread);
1710 } else if (((num_aio_resv_start + num_aio_procs) < max_aio_procs) &&
1711 ((ki->kaio_active_count + num_aio_resv_start) <
1712 ki->kaio_maxactive_count)) {
1713 taskqueue_enqueue(taskqueue_aiod_bio, &ki->kaio_task);
1714 }
1715}
1716
1717static int
1718aio_kick(struct proc *userp)
1719{
1720 struct kaioinfo *ki = userp->p_aioinfo;
1721 struct aiothreadlist *aiop;
1722 int error, ret = 0;
1723
1724 mtx_assert(&aio_job_mtx, MA_OWNED);
1725retryproc:
1726 if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) {
1727 TAILQ_REMOVE(&aio_freeproc, aiop, list);
1728 aiop->aiothreadflags &= ~AIOP_FREE;
1729 wakeup(aiop->aiothread);
1730 } else if (((num_aio_resv_start + num_aio_procs) < max_aio_procs) &&
1731 ((ki->kaio_active_count + num_aio_resv_start) <
1732 ki->kaio_maxactive_count)) {
1733 num_aio_resv_start++;
1734 mtx_unlock(&aio_job_mtx);
1735 error = aio_newproc(&num_aio_resv_start);
1736 mtx_lock(&aio_job_mtx);
1737 if (error) {
1738 num_aio_resv_start--;
1739 goto retryproc;
1740 }
1741 } else {
1742 ret = -1;
1743 }
1744 return (ret);
1745}
1746
1747static void
1748aio_kick_helper(void *context, int pending)
1749{
1750 struct proc *userp = context;
1751
1752 mtx_lock(&aio_job_mtx);
1753 while (--pending >= 0) {
1754 if (aio_kick(userp))
1755 break;
1756 }
1757 mtx_unlock(&aio_job_mtx);
1758}
1759
1760/*
1761 * Support the aio_return system call, as a side-effect, kernel resources are
1762 * released.
1763 */
1764static int
1765kern_aio_return(struct thread *td, struct aiocb *uaiocb, struct aiocb_ops *ops)
1766{
1767 struct proc *p = td->td_proc;
1768 struct aiocblist *cb;
1769 struct kaioinfo *ki;
1770 int status, error;
1771
1772 ki = p->p_aioinfo;
1773 if (ki == NULL)
1774 return (EINVAL);
1775 AIO_LOCK(ki);
1776 TAILQ_FOREACH(cb, &ki->kaio_done, plist) {
1777 if (cb->uuaiocb == uaiocb)
1778 break;
1779 }
1780 if (cb != NULL) {
1781 MPASS(cb->jobstate == JOBST_JOBFINISHED);
1782 status = cb->uaiocb._aiocb_private.status;
1783 error = cb->uaiocb._aiocb_private.error;
1784 td->td_retval[0] = status;
1785 if (cb->uaiocb.aio_lio_opcode == LIO_WRITE) {
1786 td->td_ru.ru_oublock += cb->outputcharge;
1787 cb->outputcharge = 0;
1788 } else if (cb->uaiocb.aio_lio_opcode == LIO_READ) {
1789 td->td_ru.ru_inblock += cb->inputcharge;
1790 cb->inputcharge = 0;
1791 }
1792 aio_free_entry(cb);
1793 AIO_UNLOCK(ki);
1794 ops->store_error(uaiocb, error);
1795 ops->store_status(uaiocb, status);
1796 } else {
1797 error = EINVAL;
1798 AIO_UNLOCK(ki);
1799 }
1800 return (error);
1801}
1802
1803int
1804aio_return(struct thread *td, struct aio_return_args *uap)
1805{
1806
1807 return (kern_aio_return(td, uap->aiocbp, &aiocb_ops));
1808}
1809
1810/*
1811 * Allow a process to wakeup when any of the I/O requests are completed.
1812 */
1813static int
1814kern_aio_suspend(struct thread *td, int njoblist, struct aiocb **ujoblist,
1815 struct timespec *ts)
1816{
1817 struct proc *p = td->td_proc;
1818 struct timeval atv;
1819 struct kaioinfo *ki;
1820 struct aiocblist *cb, *cbfirst;
1821 int error, i, timo;
1822
1823 timo = 0;
1824 if (ts) {
1825 if (ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
1826 return (EINVAL);
1827
1828 TIMESPEC_TO_TIMEVAL(&atv, ts);
1829 if (itimerfix(&atv))
1830 return (EINVAL);
1831 timo = tvtohz(&atv);
1832 }
1833
1834 ki = p->p_aioinfo;
1835 if (ki == NULL)
1836 return (EAGAIN);
1837
1838 if (njoblist == 0)
1839 return (0);
1840
1841 AIO_LOCK(ki);
1842 for (;;) {
1843 cbfirst = NULL;
1844 error = 0;
1845 TAILQ_FOREACH(cb, &ki->kaio_all, allist) {
1846 for (i = 0; i < njoblist; i++) {
1847 if (cb->uuaiocb == ujoblist[i]) {
1848 if (cbfirst == NULL)
1849 cbfirst = cb;
1850 if (cb->jobstate == JOBST_JOBFINISHED)
1851 goto RETURN;
1852 }
1853 }
1854 }
1855 /* All tasks were finished. */
1856 if (cbfirst == NULL)
1857 break;
1858
1859 ki->kaio_flags |= KAIO_WAKEUP;
1860 error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH,
1861 "aiospn", timo);
1862 if (error == ERESTART)
1863 error = EINTR;
1864 if (error)
1865 break;
1866 }
1867RETURN:
1868 AIO_UNLOCK(ki);
1869 return (error);
1870}
1871
1872int
1873aio_suspend(struct thread *td, struct aio_suspend_args *uap)
1874{
1875 struct timespec ts, *tsp;
1876 struct aiocb **ujoblist;
1877 int error;
1878
1879 if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX)
1880 return (EINVAL);
1881
1882 if (uap->timeout) {
1883 /* Get timespec struct. */
1884 if ((error = copyin(uap->timeout, &ts, sizeof(ts))) != 0)
1885 return (error);
1886 tsp = &ts;
1887 } else
1888 tsp = NULL;
1889
1890 ujoblist = uma_zalloc(aiol_zone, M_WAITOK);
1891 error = copyin(uap->aiocbp, ujoblist, uap->nent * sizeof(ujoblist[0]));
1892 if (error == 0)
1893 error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);
1894 uma_zfree(aiol_zone, ujoblist);
1895 return (error);
1896}
1897
1898/*
1899 * aio_cancel cancels any non-physio aio operations not currently in
1900 * progress.
1901 */
1902int
1903aio_cancel(struct thread *td, struct aio_cancel_args *uap)
1904{
1905 struct proc *p = td->td_proc;
1906 struct kaioinfo *ki;
1907 struct aiocblist *cbe, *cbn;
1908 struct file *fp;
1909 struct socket *so;
1910 int error;
1911 int remove;
1912 int cancelled = 0;
1913 int notcancelled = 0;
1914 struct vnode *vp;
1915
1916 /* Lookup file object. */
1917 error = fget(td, uap->fd, &fp);
1918 if (error)
1919 return (error);
1920
1921 ki = p->p_aioinfo;
1922 if (ki == NULL)
1923 goto done;
1924
1925 if (fp->f_type == DTYPE_VNODE) {
1926 vp = fp->f_vnode;
1927 if (vn_isdisk(vp, &error)) {
1928 fdrop(fp, td);
1929 td->td_retval[0] = AIO_NOTCANCELED;
1930 return (0);
1931 }
1932 }
1933
1934 AIO_LOCK(ki);
1935 TAILQ_FOREACH_SAFE(cbe, &ki->kaio_jobqueue, plist, cbn) {
1936 if ((uap->fd == cbe->uaiocb.aio_fildes) &&
1937 ((uap->aiocbp == NULL) ||
1938 (uap->aiocbp == cbe->uuaiocb))) {
1939 remove = 0;
1940
1941 mtx_lock(&aio_job_mtx);
1942 if (cbe->jobstate == JOBST_JOBQGLOBAL) {
1943 TAILQ_REMOVE(&aio_jobs, cbe, list);
1944 remove = 1;
1945 } else if (cbe->jobstate == JOBST_JOBQSOCK) {
1946 MPASS(fp->f_type == DTYPE_SOCKET);
1947 so = fp->f_data;
1948 TAILQ_REMOVE(&so->so_aiojobq, cbe, list);
1949 remove = 1;
1950 } else if (cbe->jobstate == JOBST_JOBQSYNC) {
1951 TAILQ_REMOVE(&ki->kaio_syncqueue, cbe, list);
1952 remove = 1;
1953 }
1954 mtx_unlock(&aio_job_mtx);
1955
1956 if (remove) {
1957 TAILQ_REMOVE(&ki->kaio_jobqueue, cbe, plist);
1958 cbe->uaiocb._aiocb_private.status = -1;
1959 cbe->uaiocb._aiocb_private.error = ECANCELED;
1960 aio_bio_done_notify(p, cbe, DONE_QUEUE);
1961 cancelled++;
1962 } else {
1963 notcancelled++;
1964 }
1965 if (uap->aiocbp != NULL)
1966 break;
1967 }
1968 }
1969 AIO_UNLOCK(ki);
1970
1971done:
1972 fdrop(fp, td);
1973
1974 if (uap->aiocbp != NULL) {
1975 if (cancelled) {
1976 td->td_retval[0] = AIO_CANCELED;
1977 return (0);
1978 }
1979 }
1980
1981 if (notcancelled) {
1982 td->td_retval[0] = AIO_NOTCANCELED;
1983 return (0);
1984 }
1985
1986 if (cancelled) {
1987 td->td_retval[0] = AIO_CANCELED;
1988 return (0);
1989 }
1990
1991 td->td_retval[0] = AIO_ALLDONE;
1992
1993 return (0);
1994}
1995
1996/*
1997 * aio_error is implemented in the kernel level for compatibility purposes
1998 * only. For a user mode async implementation, it would be best to do it in
1999 * a userland subroutine.
2000 */
2001static int
2002kern_aio_error(struct thread *td, struct aiocb *aiocbp, struct aiocb_ops *ops)
2003{
2004 struct proc *p = td->td_proc;
2005 struct aiocblist *cb;
2006 struct kaioinfo *ki;
2007 int status;
2008
2009 ki = p->p_aioinfo;
2010 if (ki == NULL) {
2011 td->td_retval[0] = EINVAL;
2012 return (0);
2013 }
2014
2015 AIO_LOCK(ki);
2016 TAILQ_FOREACH(cb, &ki->kaio_all, allist) {
2017 if (cb->uuaiocb == aiocbp) {
2018 if (cb->jobstate == JOBST_JOBFINISHED)
2019 td->td_retval[0] =
2020 cb->uaiocb._aiocb_private.error;
2021 else
2022 td->td_retval[0] = EINPROGRESS;
2023 AIO_UNLOCK(ki);
2024 return (0);
2025 }
2026 }
2027 AIO_UNLOCK(ki);
2028
2029 /*
2030 * Hack for failure of aio_aqueue.
2031 */
2032 status = ops->fetch_status(aiocbp);
2033 if (status == -1) {
2034 td->td_retval[0] = ops->fetch_error(aiocbp);
2035 return (0);
2036 }
2037
2038 td->td_retval[0] = EINVAL;
2039 return (0);
2040}
2041
2042int
2043aio_error(struct thread *td, struct aio_error_args *uap)
2044{
2045
2046 return (kern_aio_error(td, uap->aiocbp, &aiocb_ops));
2047}
2048
2049/* syscall - asynchronous read from a file (REALTIME) */
2050int
2051oaio_read(struct thread *td, struct oaio_read_args *uap)
2052{
2053
2054 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
2055 &aiocb_ops_osigevent));
2056}
2057
2058int
2059aio_read(struct thread *td, struct aio_read_args *uap)
2060{
2061
2062 return (aio_aqueue(td, uap->aiocbp, NULL, LIO_READ, &aiocb_ops));
2063}
2064
2065/* syscall - asynchronous write to a file (REALTIME) */
2066int
2067oaio_write(struct thread *td, struct oaio_write_args *uap)
2068{
2069
2070 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
2071 &aiocb_ops_osigevent));
2072}
2073
2074int
2075aio_write(struct thread *td, struct aio_write_args *uap)
2076{
2077
2078 return (aio_aqueue(td, uap->aiocbp, NULL, LIO_WRITE, &aiocb_ops));
2079}
2080
2081static int
2082kern_lio_listio(struct thread *td, int mode, struct aiocb * const *uacb_list,
2083 struct aiocb **acb_list, int nent, struct sigevent *sig,
2084 struct aiocb_ops *ops)
2085{
2086 struct proc *p = td->td_proc;
2087 struct aiocb *iocb;
2088 struct kaioinfo *ki;
2089 struct aioliojob *lj;
2090 struct kevent kev;
2091 int error;
2092 int nerror;
2093 int i;
2094
2095 if ((mode != LIO_NOWAIT) && (mode != LIO_WAIT))
2096 return (EINVAL);
2097
2098 if (nent < 0 || nent > AIO_LISTIO_MAX)
2099 return (EINVAL);
2100
2101 if (p->p_aioinfo == NULL)
2102 aio_init_aioinfo(p);
2103
2104 ki = p->p_aioinfo;
2105
2106 lj = uma_zalloc(aiolio_zone, M_WAITOK);
2107 lj->lioj_flags = 0;
2108 lj->lioj_count = 0;
2109 lj->lioj_finished_count = 0;
2110 knlist_init(&lj->klist, AIO_MTX(ki), NULL, NULL, NULL);
2111 ksiginfo_init(&lj->lioj_ksi);
2112
2113 /*
2114 * Setup signal.
2115 */
2116 if (sig && (mode == LIO_NOWAIT)) {
2117 bcopy(sig, &lj->lioj_signal, sizeof(lj->lioj_signal));
2118 if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
2119 /* Assume only new style KEVENT */
2120 kev.filter = EVFILT_LIO;
2121 kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1;
2122 kev.ident = (uintptr_t)uacb_list; /* something unique */
2123 kev.data = (intptr_t)lj;
2124 /* pass user defined sigval data */
2125 kev.udata = lj->lioj_signal.sigev_value.sival_ptr;
2126 error = kqfd_register(
2127 lj->lioj_signal.sigev_notify_kqueue, &kev, td, 1);
2128 if (error) {
2129 uma_zfree(aiolio_zone, lj);
2130 return (error);
2131 }
2132 } else if (lj->lioj_signal.sigev_notify == SIGEV_NONE) {
2133 ;
2134 } else if (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
2135 lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID) {
2136 if (!_SIG_VALID(lj->lioj_signal.sigev_signo)) {
2137 uma_zfree(aiolio_zone, lj);
2138 return EINVAL;
2139 }
2140 lj->lioj_flags |= LIOJ_SIGNAL;
2141 } else {
2142 uma_zfree(aiolio_zone, lj);
2143 return EINVAL;
2144 }
2145 }
2146
2147 AIO_LOCK(ki);
2148 TAILQ_INSERT_TAIL(&ki->kaio_liojoblist, lj, lioj_list);
2149 /*
2150 * Add extra aiocb count to avoid the lio to be freed
2151 * by other threads doing aio_waitcomplete or aio_return,
2152 * and prevent event from being sent until we have queued
2153 * all tasks.
2154 */
2155 lj->lioj_count = 1;
2156 AIO_UNLOCK(ki);
2157
2158 /*
2159 * Get pointers to the list of I/O requests.
2160 */
2161 nerror = 0;
2162 for (i = 0; i < nent; i++) {
2163 iocb = acb_list[i];
2164 if (iocb != NULL) {
2165 error = aio_aqueue(td, iocb, lj, LIO_NOP, ops);
2166 if (error != 0)
2167 nerror++;
2168 }
2169 }
2170
2171 error = 0;
2172 AIO_LOCK(ki);
2173 if (mode == LIO_WAIT) {
2174 while (lj->lioj_count - 1 != lj->lioj_finished_count) {
2175 ki->kaio_flags |= KAIO_WAKEUP;
2176 error = msleep(&p->p_aioinfo, AIO_MTX(ki),
2177 PRIBIO | PCATCH, "aiospn", 0);
2178 if (error == ERESTART)
2179 error = EINTR;
2180 if (error)
2181 break;
2182 }
2183 } else {
2184 if (lj->lioj_count - 1 == lj->lioj_finished_count) {
2185 if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
2186 lj->lioj_flags |= LIOJ_KEVENT_POSTED;
2187 KNOTE_LOCKED(&lj->klist, 1);
2188 }
2189 if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED))
2190 == LIOJ_SIGNAL
2191 && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
2192 lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) {
2193 aio_sendsig(p, &lj->lioj_signal,
2194 &lj->lioj_ksi);
2195 lj->lioj_flags |= LIOJ_SIGNAL_POSTED;
2196 }
2197 }
2198 }
2199 lj->lioj_count--;
2200 if (lj->lioj_count == 0) {
2201 TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
2202 knlist_delete(&lj->klist, curthread, 1);
2203 PROC_LOCK(p);
2204 sigqueue_take(&lj->lioj_ksi);
2205 PROC_UNLOCK(p);
2206 AIO_UNLOCK(ki);
2207 uma_zfree(aiolio_zone, lj);
2208 } else
2209 AIO_UNLOCK(ki);
2210
2211 if (nerror)
2212 return (EIO);
2213 return (error);
2214}
2215
2216/* syscall - list directed I/O (REALTIME) */
2217int
2218olio_listio(struct thread *td, struct olio_listio_args *uap)
2219{
2220 struct aiocb **acb_list;
2221 struct sigevent *sigp, sig;
2222 struct osigevent osig;
2223 int error, nent;
2224
2225 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2226 return (EINVAL);
2227
2228 nent = uap->nent;
2229 if (nent < 0 || nent > AIO_LISTIO_MAX)
2230 return (EINVAL);
2231
2232 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2233 error = copyin(uap->sig, &osig, sizeof(osig));
2234 if (error)
2235 return (error);
2236 error = convert_old_sigevent(&osig, &sig);
2237 if (error)
2238 return (error);
2239 sigp = &sig;
2240 } else
2241 sigp = NULL;
2242
2243 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2244 error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0]));
2245 if (error == 0)
2246 error = kern_lio_listio(td, uap->mode,
2247 (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
2248 &aiocb_ops_osigevent);
2249 free(acb_list, M_LIO);
2250 return (error);
2251}
2252
2253/* syscall - list directed I/O (REALTIME) */
2254int
2255lio_listio(struct thread *td, struct lio_listio_args *uap)
2256{
2257 struct aiocb **acb_list;
2258 struct sigevent *sigp, sig;
2259 int error, nent;
2260
2261 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2262 return (EINVAL);
2263
2264 nent = uap->nent;
2265 if (nent < 0 || nent > AIO_LISTIO_MAX)
2266 return (EINVAL);
2267
2268 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2269 error = copyin(uap->sig, &sig, sizeof(sig));
2270 if (error)
2271 return (error);
2272 sigp = &sig;
2273 } else
2274 sigp = NULL;
2275
2276 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2277 error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0]));
2278 if (error == 0)
2279 error = kern_lio_listio(td, uap->mode, uap->acb_list, acb_list,
2280 nent, sigp, &aiocb_ops);
2281 free(acb_list, M_LIO);
2282 return (error);
2283}
2284
2285/*
2286 * Called from interrupt thread for physio, we should return as fast
2287 * as possible, so we schedule a biohelper task.
2288 */
2289static void
2290aio_physwakeup(struct buf *bp)
2291{
2292 struct aiocblist *aiocbe;
2293
2294 aiocbe = (struct aiocblist *)bp->b_caller1;
2295 taskqueue_enqueue(taskqueue_aiod_bio, &aiocbe->biotask);
2296}
2297
2298/*
2299 * Task routine to perform heavy tasks, process wakeup, and signals.
2300 */
2301static void
2302biohelper(void *context, int pending)
2303{
2304 struct aiocblist *aiocbe = context;
2305 struct buf *bp;
2306 struct proc *userp;
2307 struct kaioinfo *ki;
2308 int nblks;
2309
2310 bp = aiocbe->bp;
2311 userp = aiocbe->userproc;
2312 ki = userp->p_aioinfo;
2313 AIO_LOCK(ki);
2314 aiocbe->uaiocb._aiocb_private.status -= bp->b_resid;
2315 aiocbe->uaiocb._aiocb_private.error = 0;
2316 if (bp->b_ioflags & BIO_ERROR)
2317 aiocbe->uaiocb._aiocb_private.error = bp->b_error;
2318 nblks = btodb(aiocbe->uaiocb.aio_nbytes);
2319 if (aiocbe->uaiocb.aio_lio_opcode == LIO_WRITE)
2320 aiocbe->outputcharge += nblks;
2321 else
2322 aiocbe->inputcharge += nblks;
2323 aiocbe->bp = NULL;
2324 TAILQ_REMOVE(&userp->p_aioinfo->kaio_bufqueue, aiocbe, plist);
2325 ki->kaio_buffer_count--;
2326 aio_bio_done_notify(userp, aiocbe, DONE_BUF);
2327 AIO_UNLOCK(ki);
2328
2329 /* Release mapping into kernel space. */
2330 vunmapbuf(bp);
2331 relpbuf(bp, NULL);
2332 atomic_subtract_int(&num_buf_aio, 1);
2333}
2334
2335/* syscall - wait for the next completion of an aio request */
2336static int
2337kern_aio_waitcomplete(struct thread *td, struct aiocb **aiocbp,
2338 struct timespec *ts, struct aiocb_ops *ops)
2339{
2340 struct proc *p = td->td_proc;
2341 struct timeval atv;
2342 struct kaioinfo *ki;
2343 struct aiocblist *cb;
2344 struct aiocb *uuaiocb;
2345 int error, status, timo;
2346
2347 ops->store_aiocb(aiocbp, NULL);
2348
2349 timo = 0;
2350 if (ts) {
2351 if ((ts->tv_nsec < 0) || (ts->tv_nsec >= 1000000000))
2352 return (EINVAL);
2353
2354 TIMESPEC_TO_TIMEVAL(&atv, ts);
2355 if (itimerfix(&atv))
2356 return (EINVAL);
2357 timo = tvtohz(&atv);
2358 }
2359
2360 if (p->p_aioinfo == NULL)
2361 aio_init_aioinfo(p);
2362 ki = p->p_aioinfo;
2363
2364 error = 0;
2365 cb = NULL;
2366 AIO_LOCK(ki);
2367 while ((cb = TAILQ_FIRST(&ki->kaio_done)) == NULL) {
2368 ki->kaio_flags |= KAIO_WAKEUP;
2369 error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH,
2370 "aiowc", timo);
2371 if (timo && error == ERESTART)
2372 error = EINTR;
2373 if (error)
2374 break;
2375 }
2376
2377 if (cb != NULL) {
2378 MPASS(cb->jobstate == JOBST_JOBFINISHED);
2379 uuaiocb = cb->uuaiocb;
2380 status = cb->uaiocb._aiocb_private.status;
2381 error = cb->uaiocb._aiocb_private.error;
2382 td->td_retval[0] = status;
2383 if (cb->uaiocb.aio_lio_opcode == LIO_WRITE) {
2384 td->td_ru.ru_oublock += cb->outputcharge;
2385 cb->outputcharge = 0;
2386 } else if (cb->uaiocb.aio_lio_opcode == LIO_READ) {
2387 td->td_ru.ru_inblock += cb->inputcharge;
2388 cb->inputcharge = 0;
2389 }
2390 aio_free_entry(cb);
2391 AIO_UNLOCK(ki);
2392 ops->store_aiocb(aiocbp, uuaiocb);
2393 ops->store_error(uuaiocb, error);
2394 ops->store_status(uuaiocb, status);
2395 } else
2396 AIO_UNLOCK(ki);
2397
2398 return (error);
2399}
2400
2401int
2402aio_waitcomplete(struct thread *td, struct aio_waitcomplete_args *uap)
2403{
2404 struct timespec ts, *tsp;
2405 int error;
2406
2407 if (uap->timeout) {
2408 /* Get timespec struct. */
2409 error = copyin(uap->timeout, &ts, sizeof(ts));
2410 if (error)
2411 return (error);
2412 tsp = &ts;
2413 } else
2414 tsp = NULL;
2415
2416 return (kern_aio_waitcomplete(td, uap->aiocbp, tsp, &aiocb_ops));
2417}
2418
2419static int
2420kern_aio_fsync(struct thread *td, int op, struct aiocb *aiocbp,
2421 struct aiocb_ops *ops)
2422{
2423 struct proc *p = td->td_proc;
2424 struct kaioinfo *ki;
2425
2426 if (op != O_SYNC) /* XXX lack of O_DSYNC */
2427 return (EINVAL);
2428 ki = p->p_aioinfo;
2429 if (ki == NULL)
2430 aio_init_aioinfo(p);
2431 return (aio_aqueue(td, aiocbp, NULL, LIO_SYNC, ops));
2432}
2433
2434int
2435aio_fsync(struct thread *td, struct aio_fsync_args *uap)
2436{
2437
2438 return (kern_aio_fsync(td, uap->op, uap->aiocbp, &aiocb_ops));
2439}
2440
2441/* kqueue attach function */
2442static int
2443filt_aioattach(struct knote *kn)
2444{
2445 struct aiocblist *aiocbe = (struct aiocblist *)kn->kn_sdata;
2446
2447 /*
2448 * The aiocbe pointer must be validated before using it, so
2449 * registration is restricted to the kernel; the user cannot
2450 * set EV_FLAG1.
2451 */
2452 if ((kn->kn_flags & EV_FLAG1) == 0)
2453 return (EPERM);
2454 kn->kn_ptr.p_aio = aiocbe;
2455 kn->kn_flags &= ~EV_FLAG1;
2456
2457 knlist_add(&aiocbe->klist, kn, 0);
2458
2459 return (0);
2460}
2461
2462/* kqueue detach function */
2463static void
2464filt_aiodetach(struct knote *kn)
2465{
2466 struct aiocblist *aiocbe = kn->kn_ptr.p_aio;
2467
2468 if (!knlist_empty(&aiocbe->klist))
2469 knlist_remove(&aiocbe->klist, kn, 0);
2470}
2471
2472/* kqueue filter function */
2473/*ARGSUSED*/
2474static int
2475filt_aio(struct knote *kn, long hint)
2476{
2477 struct aiocblist *aiocbe = kn->kn_ptr.p_aio;
2478
2479 kn->kn_data = aiocbe->uaiocb._aiocb_private.error;
2480 if (aiocbe->jobstate != JOBST_JOBFINISHED)
2481 return (0);
2482 kn->kn_flags |= EV_EOF;
2483 return (1);
2484}
2485
2486/* kqueue attach function */
2487static int
2488filt_lioattach(struct knote *kn)
2489{
2490 struct aioliojob * lj = (struct aioliojob *)kn->kn_sdata;
2491
2492 /*
2493 * The aioliojob pointer must be validated before using it, so
2494 * registration is restricted to the kernel; the user cannot
2495 * set EV_FLAG1.
2496 */
2497 if ((kn->kn_flags & EV_FLAG1) == 0)
2498 return (EPERM);
2499 kn->kn_ptr.p_lio = lj;
2500 kn->kn_flags &= ~EV_FLAG1;
2501
2502 knlist_add(&lj->klist, kn, 0);
2503
2504 return (0);
2505}
2506
2507/* kqueue detach function */
2508static void
2509filt_liodetach(struct knote *kn)
2510{
2511 struct aioliojob * lj = kn->kn_ptr.p_lio;
2512
2513 if (!knlist_empty(&lj->klist))
2514 knlist_remove(&lj->klist, kn, 0);
2515}
2516
2517/* kqueue filter function */
2518/*ARGSUSED*/
2519static int
2520filt_lio(struct knote *kn, long hint)
2521{
2522 struct aioliojob * lj = kn->kn_ptr.p_lio;
2523
2524 return (lj->lioj_flags & LIOJ_KEVENT_POSTED);
2525}
2526
2527#ifdef COMPAT_IA32
2528#include <sys/mount.h>
2529#include <sys/socket.h>
2530#include <compat/freebsd32/freebsd32.h>
2531#include <compat/freebsd32/freebsd32_proto.h>
2532#include <compat/freebsd32/freebsd32_signal.h>
2533#include <compat/freebsd32/freebsd32_syscall.h>
2534#include <compat/freebsd32/freebsd32_util.h>
2535
2536struct __aiocb_private32 {
2537 int32_t status;
2538 int32_t error;
2539 uint32_t kernelinfo;
2540};
2541
2542typedef struct oaiocb32 {
2543 int aio_fildes; /* File descriptor */
2544 uint64_t aio_offset __packed; /* File offset for I/O */
2545 uint32_t aio_buf; /* I/O buffer in process space */
2546 uint32_t aio_nbytes; /* Number of bytes for I/O */
2547 struct osigevent32 aio_sigevent; /* Signal to deliver */
2548 int aio_lio_opcode; /* LIO opcode */
2549 int aio_reqprio; /* Request priority -- ignored */
2550 struct __aiocb_private32 _aiocb_private;
2551} oaiocb32_t;
2552
2553typedef struct aiocb32 {
2554 int32_t aio_fildes; /* File descriptor */
2555 uint64_t aio_offset __packed; /* File offset for I/O */
2556 uint32_t aio_buf; /* I/O buffer in process space */
2557 uint32_t aio_nbytes; /* Number of bytes for I/O */
2558 int __spare__[2];
2559 uint32_t __spare2__;
2560 int aio_lio_opcode; /* LIO opcode */
2561 int aio_reqprio; /* Request priority -- ignored */
2562 struct __aiocb_private32 _aiocb_private;
2563 struct sigevent32 aio_sigevent; /* Signal to deliver */
2564} aiocb32_t;
2565
2566static int
2567convert_old_sigevent32(struct osigevent32 *osig, struct sigevent *nsig)
2568{
2569
2570 /*
2571 * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are
2572 * supported by AIO with the old sigevent structure.
2573 */
2574 CP(*osig, *nsig, sigev_notify);
2575 switch (nsig->sigev_notify) {
2576 case SIGEV_NONE:
2577 break;
2578 case SIGEV_SIGNAL:
2579 nsig->sigev_signo = osig->__sigev_u.__sigev_signo;
2580 break;
2581 case SIGEV_KEVENT:
2582 nsig->sigev_notify_kqueue =
2583 osig->__sigev_u.__sigev_notify_kqueue;
2584 PTRIN_CP(*osig, *nsig, sigev_value.sival_ptr);
2585 break;
2586 default:
2587 return (EINVAL);
2588 }
2589 return (0);
2590}
2591
2592static int
2593aiocb32_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
2594{
2595 struct oaiocb32 job32;
2596 int error;
2597
2598 bzero(kjob, sizeof(struct aiocb));
2599 error = copyin(ujob, &job32, sizeof(job32));
2600 if (error)
2601 return (error);
2602
2603 CP(job32, *kjob, aio_fildes);
2604 CP(job32, *kjob, aio_offset);
2605 PTRIN_CP(job32, *kjob, aio_buf);
2606 CP(job32, *kjob, aio_nbytes);
2607 CP(job32, *kjob, aio_lio_opcode);
2608 CP(job32, *kjob, aio_reqprio);
2609 CP(job32, *kjob, _aiocb_private.status);
2610 CP(job32, *kjob, _aiocb_private.error);
2611 PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo);
2612 return (convert_old_sigevent32(&job32.aio_sigevent,
2613 &kjob->aio_sigevent));
2614}
2615
2616static int
2617convert_sigevent32(struct sigevent32 *sig32, struct sigevent *sig)
2618{
2619
2620 CP(*sig32, *sig, sigev_notify);
2621 switch (sig->sigev_notify) {
2622 case SIGEV_NONE:
2623 break;
2624 case SIGEV_THREAD_ID:
2625 CP(*sig32, *sig, sigev_notify_thread_id);
2626 /* FALLTHROUGH */
2627 case SIGEV_SIGNAL:
2628 CP(*sig32, *sig, sigev_signo);
2629 break;
2630 case SIGEV_KEVENT:
2631 CP(*sig32, *sig, sigev_notify_kqueue);
2632 PTRIN_CP(*sig32, *sig, sigev_value.sival_ptr);
2633 break;
2634 default:
2635 return (EINVAL);
2636 }
2637 return (0);
2638}
2639
2640static int
2641aiocb32_copyin(struct aiocb *ujob, struct aiocb *kjob)
2642{
2643 struct aiocb32 job32;
2644 int error;
2645
2646 error = copyin(ujob, &job32, sizeof(job32));
2647 if (error)
2648 return (error);
2649 CP(job32, *kjob, aio_fildes);
2650 CP(job32, *kjob, aio_offset);
2651 PTRIN_CP(job32, *kjob, aio_buf);
2652 CP(job32, *kjob, aio_nbytes);
2653 CP(job32, *kjob, aio_lio_opcode);
2654 CP(job32, *kjob, aio_reqprio);
2655 CP(job32, *kjob, _aiocb_private.status);
2656 CP(job32, *kjob, _aiocb_private.error);
2657 PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo);
2658 return (convert_sigevent32(&job32.aio_sigevent, &kjob->aio_sigevent));
2659}
2660
2661static long
2662aiocb32_fetch_status(struct aiocb *ujob)
2663{
2664 struct aiocb32 *ujob32;
2665
2666 ujob32 = (struct aiocb32 *)ujob;
2667 return (fuword32(&ujob32->_aiocb_private.status));
2668}
2669
2670static long
2671aiocb32_fetch_error(struct aiocb *ujob)
2672{
2673 struct aiocb32 *ujob32;
2674
2675 ujob32 = (struct aiocb32 *)ujob;
2676 return (fuword32(&ujob32->_aiocb_private.error));
2677}
2678
2679static int
2680aiocb32_store_status(struct aiocb *ujob, long status)
2681{
2682 struct aiocb32 *ujob32;
2683
2684 ujob32 = (struct aiocb32 *)ujob;
2685 return (suword32(&ujob32->_aiocb_private.status, status));
2686}
2687
2688static int
2689aiocb32_store_error(struct aiocb *ujob, long error)
2690{
2691 struct aiocb32 *ujob32;
2692
2693 ujob32 = (struct aiocb32 *)ujob;
2694 return (suword32(&ujob32->_aiocb_private.error, error));
2695}
2696
2697static int
2698aiocb32_store_kernelinfo(struct aiocb *ujob, long jobref)
2699{
2700 struct aiocb32 *ujob32;
2701
2702 ujob32 = (struct aiocb32 *)ujob;
2703 return (suword32(&ujob32->_aiocb_private.kernelinfo, jobref));
2704}
2705
2706static int
2707aiocb32_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob)
2708{
2709
2710 return (suword32(ujobp, (long)ujob));
2711}
2712
2713static struct aiocb_ops aiocb32_ops = {
2714 .copyin = aiocb32_copyin,
2715 .fetch_status = aiocb32_fetch_status,
2716 .fetch_error = aiocb32_fetch_error,
2717 .store_status = aiocb32_store_status,
2718 .store_error = aiocb32_store_error,
2719 .store_kernelinfo = aiocb32_store_kernelinfo,
2720 .store_aiocb = aiocb32_store_aiocb,
2721};
2722
2723static struct aiocb_ops aiocb32_ops_osigevent = {
2724 .copyin = aiocb32_copyin_old_sigevent,
2725 .fetch_status = aiocb32_fetch_status,
2726 .fetch_error = aiocb32_fetch_error,
2727 .store_status = aiocb32_store_status,
2728 .store_error = aiocb32_store_error,
2729 .store_kernelinfo = aiocb32_store_kernelinfo,
2730 .store_aiocb = aiocb32_store_aiocb,
2731};
2732
2733int
2734freebsd32_aio_return(struct thread *td, struct freebsd32_aio_return_args *uap)
2735{
2736
2737 return (kern_aio_return(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops));
2738}
2739
2740int
2741freebsd32_aio_suspend(struct thread *td, struct freebsd32_aio_suspend_args *uap)
2742{
2743 struct timespec32 ts32;
2744 struct timespec ts, *tsp;
2745 struct aiocb **ujoblist;
2746 uint32_t *ujoblist32;
2747 int error, i;
2748
2749 if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX)
2750 return (EINVAL);
2751
2752 if (uap->timeout) {
2753 /* Get timespec struct. */
2754 if ((error = copyin(uap->timeout, &ts32, sizeof(ts32))) != 0)
2755 return (error);
2756 CP(ts32, ts, tv_sec);
2757 CP(ts32, ts, tv_nsec);
2758 tsp = &ts;
2759 } else
2760 tsp = NULL;
2761
2762 ujoblist = uma_zalloc(aiol_zone, M_WAITOK);
2763 ujoblist32 = (uint32_t *)ujoblist;
2764 error = copyin(uap->aiocbp, ujoblist32, uap->nent *
2765 sizeof(ujoblist32[0]));
2766 if (error == 0) {
2767 for (i = uap->nent; i > 0; i--)
2768 ujoblist[i] = PTRIN(ujoblist32[i]);
2769
2770 error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);
2771 }
2772 uma_zfree(aiol_zone, ujoblist);
2773 return (error);
2774}
2775
2776int
2777freebsd32_aio_cancel(struct thread *td, struct freebsd32_aio_cancel_args *uap)
2778{
2779
2780 return (aio_cancel(td, (struct aio_cancel_args *)uap));
2781}
2782
2783int
2784freebsd32_aio_error(struct thread *td, struct freebsd32_aio_error_args *uap)
2785{
2786
2787 return (kern_aio_error(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops));
2788}
2789
2790int
2791freebsd32_oaio_read(struct thread *td, struct freebsd32_oaio_read_args *uap)
2792{
2793
2794 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
2795 &aiocb32_ops_osigevent));
2796}
2797
2798int
2799freebsd32_aio_read(struct thread *td, struct freebsd32_aio_read_args *uap)
2800{
2801
2802 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
2803 &aiocb32_ops));
2804}
2805
2806int
2807freebsd32_oaio_write(struct thread *td, struct freebsd32_oaio_write_args *uap)
2808{
2809
2810 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
2811 &aiocb32_ops_osigevent));
2812}
2813
2814int
2815freebsd32_aio_write(struct thread *td, struct freebsd32_aio_write_args *uap)
2816{
2817
2818 return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
2819 &aiocb32_ops));
2820}
2821
2822int
2823freebsd32_aio_waitcomplete(struct thread *td,
2824 struct freebsd32_aio_waitcomplete_args *uap)
2825{
2826 struct timespec32 ts32;
2827 struct timespec ts, *tsp;
2828 int error;
2829
2830 if (uap->timeout) {
2831 /* Get timespec struct. */
2832 error = copyin(uap->timeout, &ts32, sizeof(ts32));
2833 if (error)
2834 return (error);
2835 CP(ts32, ts, tv_sec);
2836 CP(ts32, ts, tv_nsec);
2837 tsp = &ts;
2838 } else
2839 tsp = NULL;
2840
2841 return (kern_aio_waitcomplete(td, (struct aiocb **)uap->aiocbp, tsp,
2842 &aiocb32_ops));
2843}
2844
2845int
2846freebsd32_aio_fsync(struct thread *td, struct freebsd32_aio_fsync_args *uap)
2847{
2848
2849 return (kern_aio_fsync(td, uap->op, (struct aiocb *)uap->aiocbp,
2850 &aiocb32_ops));
2851}
2852
2853int
2854freebsd32_olio_listio(struct thread *td, struct freebsd32_olio_listio_args *uap)
2855{
2856 struct aiocb **acb_list;
2857 struct sigevent *sigp, sig;
2858 struct osigevent32 osig;
2859 uint32_t *acb_list32;
2860 int error, i, nent;
2861
2862 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2863 return (EINVAL);
2864
2865 nent = uap->nent;
2866 if (nent < 0 || nent > AIO_LISTIO_MAX)
2867 return (EINVAL);
2868
2869 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2870 error = copyin(uap->sig, &osig, sizeof(osig));
2871 if (error)
2872 return (error);
2873 error = convert_old_sigevent32(&osig, &sig);
2874 if (error)
2875 return (error);
2876 sigp = &sig;
2877 } else
2878 sigp = NULL;
2879
2880 acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK);
2881 error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t));
2882 if (error) {
2883 free(acb_list32, M_LIO);
2884 return (error);
2885 }
2886 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2887 for (i = 0; i < nent; i++)
2888 acb_list[i] = PTRIN(acb_list32[i]);
2889 free(acb_list32, M_LIO);
2890
2891 error = kern_lio_listio(td, uap->mode,
2892 (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
2893 &aiocb32_ops_osigevent);
2894 free(acb_list, M_LIO);
2895 return (error);
2896}
2897
2898int
2899freebsd32_lio_listio(struct thread *td, struct freebsd32_lio_listio_args *uap)
2900{
2901 struct aiocb **acb_list;
2902 struct sigevent *sigp, sig;
2903 struct sigevent32 sig32;
2904 uint32_t *acb_list32;
2905 int error, i, nent;
2906
2907 if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
2908 return (EINVAL);
2909
2910 nent = uap->nent;
2911 if (nent < 0 || nent > AIO_LISTIO_MAX)
2912 return (EINVAL);
2913
2914 if (uap->sig && (uap->mode == LIO_NOWAIT)) {
2915 error = copyin(uap->sig, &sig32, sizeof(sig32));
2916 if (error)
2917 return (error);
2918 error = convert_sigevent32(&sig32, &sig);
2919 if (error)
2920 return (error);
2921 sigp = &sig;
2922 } else
2923 sigp = NULL;
2924
2925 acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK);
2926 error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t));
2927 if (error) {
2928 free(acb_list32, M_LIO);
2929 return (error);
2930 }
2931 acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
2932 for (i = 0; i < nent; i++)
2933 acb_list[i] = PTRIN(acb_list32[i]);
2934 free(acb_list32, M_LIO);
2935
2936 error = kern_lio_listio(td, uap->mode,
2937 (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
2938 &aiocb32_ops);
2939 free(acb_list, M_LIO);
2940 return (error);
2941}
2942
2943SYSCALL32_MODULE_HELPER(freebsd32_aio_return);
2944SYSCALL32_MODULE_HELPER(freebsd32_aio_suspend);
2945SYSCALL32_MODULE_HELPER(freebsd32_aio_cancel);
2946SYSCALL32_MODULE_HELPER(freebsd32_aio_error);
2947SYSCALL32_MODULE_HELPER(freebsd32_aio_fsync);
2948SYSCALL32_MODULE_HELPER(freebsd32_aio_read);
2949SYSCALL32_MODULE_HELPER(freebsd32_aio_write);
2950SYSCALL32_MODULE_HELPER(freebsd32_aio_waitcomplete);
2951SYSCALL32_MODULE_HELPER(freebsd32_lio_listio);
2952SYSCALL32_MODULE_HELPER(freebsd32_oaio_read);
2953SYSCALL32_MODULE_HELPER(freebsd32_oaio_write);
2954SYSCALL32_MODULE_HELPER(freebsd32_olio_listio);
2955#endif
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