smbfs_io.c revision 111742
151090Ssheldonh/* 251090Ssheldonh * Copyright (c) 2000-2001, Boris Popov 351090Ssheldonh * All rights reserved. 451090Ssheldonh * 551090Ssheldonh * Redistribution and use in source and binary forms, with or without 651090Ssheldonh * modification, are permitted provided that the following conditions 751090Ssheldonh * are met: 851090Ssheldonh * 1. Redistributions of source code must retain the above copyright 951090Ssheldonh * notice, this list of conditions and the following disclaimer. 1051090Ssheldonh * 2. Redistributions in binary form must reproduce the above copyright 1151090Ssheldonh * notice, this list of conditions and the following disclaimer in the 1251090Ssheldonh * documentation and/or other materials provided with the distribution. 1351090Ssheldonh * 3. All advertising materials mentioning features or use of this software 1451090Ssheldonh * must display the following acknowledgement: 1551090Ssheldonh * This product includes software developed by Boris Popov. 1651090Ssheldonh * 4. Neither the name of the author nor the names of any co-contributors 1751090Ssheldonh * may be used to endorse or promote products derived from this software 1851090Ssheldonh * without specific prior written permission. 1951090Ssheldonh * 2051090Ssheldonh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2151090Ssheldonh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2251090Ssheldonh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2351090Ssheldonh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2451090Ssheldonh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2551090Ssheldonh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2651090Ssheldonh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27141580Sru * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2851090Ssheldonh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29216629Sjilles * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3051090Ssheldonh * SUCH DAMAGE. 3151090Ssheldonh * 3251090Ssheldonh * $FreeBSD: head/sys/fs/smbfs/smbfs_io.c 111742 2003-03-02 15:56:49Z des $ 3351090Ssheldonh * 34149912Sgarys */ 35165559Sru#include <sys/param.h> 36149912Sgarys#include <sys/systm.h> 37149912Sgarys#include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 38165559Sru#include <sys/kernel.h> 39207166Sjilles#include <sys/proc.h> 40165559Sru#include <sys/fcntl.h> 41165559Sru#include <sys/bio.h> 4251090Ssheldonh#include <sys/buf.h> 4351090Ssheldonh#include <sys/mount.h> 4451090Ssheldonh#include <sys/namei.h> 45100574Stjr#include <sys/vnode.h> 4660261Ssheldonh#include <sys/dirent.h> 4751090Ssheldonh#include <sys/signalvar.h> 4851090Ssheldonh#include <sys/sysctl.h> 4960261Ssheldonh#include <sys/vmmeter.h> 5051090Ssheldonh 5151090Ssheldonh#include <vm/vm.h> 5251090Ssheldonh#include <vm/vm_page.h> 5351090Ssheldonh#include <vm/vm_extern.h> 5460261Ssheldonh#include <vm/vm_object.h> 5551090Ssheldonh#include <vm/vm_pager.h> 5651090Ssheldonh#include <vm/vnode_pager.h> 5751090Ssheldonh/* 5851090Ssheldonh#include <sys/ioccom.h> 5951090Ssheldonh*/ 6051090Ssheldonh#include <netsmb/smb.h> 6160261Ssheldonh#include <netsmb/smb_conn.h> 6251090Ssheldonh#include <netsmb/smb_subr.h> 6351090Ssheldonh 6451090Ssheldonh#include <fs/smbfs/smbfs.h> 6551090Ssheldonh#include <fs/smbfs/smbfs_node.h> 6651090Ssheldonh#include <fs/smbfs/smbfs_subr.h> 6751090Ssheldonh 6851090Ssheldonh/*#define SMBFS_RWGENERIC*/ 6951090Ssheldonh 7051090Ssheldonhextern int smbfs_pbuf_freecnt; 7151090Ssheldonh 7286505Sknustatic int smbfs_fastlookup = 1; 7351090Ssheldonh 7451090SsheldonhSYSCTL_DECL(_vfs_smbfs); 7560261SsheldonhSYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 7651090Ssheldonh 7751090Ssheldonh 7851090Ssheldonh#define DE_SIZE (sizeof(struct dirent)) 7951090Ssheldonh 8051090Ssheldonhstatic int 8151090Ssheldonhsmbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 8251090Ssheldonh{ 8351090Ssheldonh struct dirent de; 8451090Ssheldonh struct componentname cn; 8560261Ssheldonh struct smb_cred scred; 8651090Ssheldonh struct smbfs_fctx *ctx; 8751090Ssheldonh struct vnode *newvp; 8851090Ssheldonh struct smbnode *np = VTOSMB(vp); 8951090Ssheldonh int error/*, *eofflag = ap->a_eofflag*/; 9051090Ssheldonh long offset, limit; 91149912Sgarys 9260261Ssheldonh np = VTOSMB(vp); 9351090Ssheldonh SMBVDEBUG("dirname='%s'\n", np->n_name); 9451090Ssheldonh smb_makescred(&scred, uio->uio_td, cred); 9560261Ssheldonh offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 9651090Ssheldonh limit = uio->uio_resid / DE_SIZE; 9751090Ssheldonh if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) 9851090Ssheldonh return EINVAL; 9951090Ssheldonh while (limit && offset < 2) { 10051090Ssheldonh limit--; 10160261Ssheldonh bzero((caddr_t)&de, DE_SIZE); 102215520Sjilles de.d_reclen = DE_SIZE; 10351090Ssheldonh de.d_fileno = (offset == 0) ? np->n_ino : 10451090Ssheldonh (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); 10557674Ssheldonh if (de.d_fileno == 0) 10651090Ssheldonh de.d_fileno = 0x7ffffffd + offset; 10751090Ssheldonh de.d_namlen = offset + 1; 10851090Ssheldonh de.d_name[0] = '.'; 109149912Sgarys de.d_name[1] = '.'; 11060261Ssheldonh de.d_name[offset + 1] = '\0'; 11151090Ssheldonh de.d_type = DT_DIR; 11251090Ssheldonh error = uiomove(&de, DE_SIZE, uio); 11360261Ssheldonh if (error) 11460261Ssheldonh return error; 11551090Ssheldonh offset++; 11651090Ssheldonh uio->uio_offset += DE_SIZE; 11751090Ssheldonh } 11851090Ssheldonh if (limit == 0) 11951090Ssheldonh return 0; 12051090Ssheldonh if (offset != np->n_dirofs || np->n_dirseq == NULL) { 12160261Ssheldonh SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 12286505Sknu if (np->n_dirseq) { 12351090Ssheldonh smbfs_findclose(np->n_dirseq, &scred); 12451090Ssheldonh np->n_dirseq = NULL; 125153092Sstefanf } 12651090Ssheldonh np->n_dirofs = 2; 12786505Sknu error = smbfs_findopen(np, "*", 1, 12851090Ssheldonh SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 12951090Ssheldonh &scred, &ctx); 13051090Ssheldonh if (error) { 13151090Ssheldonh SMBVDEBUG("can not open search, error = %d", error); 13260261Ssheldonh return error; 13351090Ssheldonh } 13451090Ssheldonh np->n_dirseq = ctx; 13551090Ssheldonh } else 13651090Ssheldonh ctx = np->n_dirseq; 13751090Ssheldonh while (np->n_dirofs < offset) { 13851090Ssheldonh error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); 13960261Ssheldonh if (error) { 14051090Ssheldonh smbfs_findclose(np->n_dirseq, &scred); 14151090Ssheldonh np->n_dirseq = NULL; 142149912Sgarys return error == ENOENT ? 0 : error; 14351090Ssheldonh } 144163326Sru } 14551090Ssheldonh error = 0; 14651090Ssheldonh for (; limit; limit--, offset++) { 14751090Ssheldonh error = smbfs_findnext(ctx, limit, &scred); 14851090Ssheldonh if (error) 14951090Ssheldonh break; 15051090Ssheldonh np->n_dirofs++; 15151090Ssheldonh bzero((caddr_t)&de, DE_SIZE); 15251090Ssheldonh de.d_reclen = DE_SIZE; 15379727Sschweikh de.d_fileno = ctx->f_attr.fa_ino; 154165559Sru de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 15551090Ssheldonh de.d_namlen = ctx->f_nmlen; 15651275Ssheldonh bcopy(ctx->f_name, de.d_name, de.d_namlen); 15751275Ssheldonh de.d_name[de.d_namlen] = '\0'; 158165559Sru if (smbfs_fastlookup) { 15951090Ssheldonh error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 160149912Sgarys ctx->f_nmlen, &ctx->f_attr, &newvp); 161149912Sgarys if (!error) { 16251090Ssheldonh cn.cn_nameptr = de.d_name; 163165559Sru cn.cn_namelen = de.d_namlen; 16451090Ssheldonh cache_enter(vp, newvp, &cn); 165165559Sru vput(newvp); 16651090Ssheldonh } 16751090Ssheldonh } 16851090Ssheldonh error = uiomove(&de, DE_SIZE, uio); 16951090Ssheldonh if (error) 17051090Ssheldonh break; 17151090Ssheldonh } 17251090Ssheldonh if (error == ENOENT) 17351090Ssheldonh error = 0; 17451090Ssheldonh uio->uio_offset = offset * DE_SIZE; 17551090Ssheldonh return error; 17651090Ssheldonh} 17751275Ssheldonh 178149912Sgarysint 179149912Sgaryssmbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 180149912Sgarys{ 181149912Sgarys struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 182149912Sgarys struct smbnode *np = VTOSMB(vp); 183149912Sgarys struct thread *td; 184149912Sgarys struct vattr vattr; 185149912Sgarys struct smb_cred scred; 186149912Sgarys int error, lks; 187149912Sgarys 188149912Sgarys /* 189149912Sgarys * Protect against method which is not supported for now 190142331Strhodes */ 191142331Strhodes if (uiop->uio_segflg == UIO_NOCOPY) 192142331Strhodes return EOPNOTSUPP; 193142331Strhodes 194142331Strhodes if (vp->v_type != VREG && vp->v_type != VDIR) { 195142331Strhodes SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 19681285Sru return EIO; 197209033Suqs } 198207168Sjilles if (uiop->uio_resid == 0) 199149912Sgarys return 0; 200207168Sjilles if (uiop->uio_offset < 0) 201207168Sjilles return EINVAL; 202207817Sjilles/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 203207166Sjilles return EFBIG;*/ 204165559Sru td = uiop->uio_td; 205165559Sru if (vp->v_type == VDIR) { 206165559Sru lks = LK_EXCLUSIVE;/*lockstatus(vp->v_vnlock, td);*/ 20751090Ssheldonh if (lks == LK_SHARED) 208142331Strhodes vn_lock(vp, LK_UPGRADE | LK_RETRY, td); 209100574Stjr error = smbfs_readvdir(vp, uiop, cred); 21060261Ssheldonh if (lks == LK_SHARED) 211165559Sru vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td); 21251090Ssheldonh return error; 213142331Strhodes } 21460261Ssheldonh 21551090Ssheldonh/* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 216165559Sru if (np->n_flag & NMODIFIED) { 217165559Sru smbfs_attr_cacheremove(vp); 218165559Sru error = VOP_GETATTR(vp, &vattr, cred, td); 21960261Ssheldonh if (error) 220165559Sru return error; 22151090Ssheldonh np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 22251090Ssheldonh } else { 22351090Ssheldonh error = VOP_GETATTR(vp, &vattr, cred, td); 22451090Ssheldonh if (error) 22551090Ssheldonh return error; 22660261Ssheldonh if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 22751090Ssheldonh error = smbfs_vinvalbuf(vp, V_SAVE, cred, td, 1); 228165559Sru if (error) 22951090Ssheldonh return error; 23051090Ssheldonh np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 23151090Ssheldonh } 23251090Ssheldonh } 23351090Ssheldonh smb_makescred(&scred, td, cred); 23451090Ssheldonh return smb_read(smp->sm_share, np->n_fid, uiop, &scred); 23551090Ssheldonh} 23651090Ssheldonh 23786505Sknuint 238165559Srusmbfs_writevnode(struct vnode *vp, struct uio *uiop, 239165559Sru struct ucred *cred, int ioflag) 24060261Ssheldonh{ 24151090Ssheldonh struct smbmount *smp = VTOSMBFS(vp); 24251090Ssheldonh struct smbnode *np = VTOSMB(vp); 24351090Ssheldonh struct smb_cred scred; 244165559Sru struct proc *p; 24551090Ssheldonh struct thread *td; 24651090Ssheldonh int error = 0; 247207196Sjilles 24851090Ssheldonh if (vp->v_type != VREG) { 24951090Ssheldonh SMBERROR("vn types other than VREG unsupported !\n"); 25060261Ssheldonh return EIO; 251165559Sru } 25251090Ssheldonh SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 253165559Sru if (uiop->uio_offset < 0) 254216629Sjilles return EINVAL; 25551090Ssheldonh/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 256149912Sgarys return (EFBIG);*/ 25760261Ssheldonh td = uiop->uio_td; 25851090Ssheldonh p = td->td_proc; 25951090Ssheldonh if (ioflag & (IO_APPEND | IO_SYNC)) { 26060261Ssheldonh if (np->n_flag & NMODIFIED) { 26151090Ssheldonh smbfs_attr_cacheremove(vp); 26251090Ssheldonh error = smbfs_vinvalbuf(vp, V_SAVE, cred, td, 1); 26351090Ssheldonh if (error) 26451090Ssheldonh return error; 26551090Ssheldonh } 26660261Ssheldonh if (ioflag & IO_APPEND) { 267215520Sjilles#if notyet 26851090Ssheldonh /* 26951090Ssheldonh * File size can be changed by another client 270165559Sru */ 27151090Ssheldonh smbfs_attr_cacheremove(vp); 27251090Ssheldonh error = VOP_GETATTR(vp, &vattr, cred, td); 27351090Ssheldonh if (error) return (error); 274149912Sgarys#endif 27560261Ssheldonh uiop->uio_offset = np->n_size; 276165559Sru } 27751090Ssheldonh } 27860261Ssheldonh if (uiop->uio_resid == 0) 27960261Ssheldonh return 0; 28051090Ssheldonh if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 28151090Ssheldonh PROC_LOCK(td->td_proc); 28251090Ssheldonh psignal(td->td_proc, SIGXFSZ); 28351090Ssheldonh PROC_UNLOCK(td->td_proc); 28451090Ssheldonh return EFBIG; 28551090Ssheldonh } 28660261Ssheldonh smb_makescred(&scred, td, cred); 28786505Sknu error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 28851090Ssheldonh SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 28951090Ssheldonh if (!error) { 290153092Sstefanf if (uiop->uio_offset > np->n_size) { 29151090Ssheldonh np->n_size = uiop->uio_offset; 29286505Sknu vnode_pager_setsize(vp, np->n_size); 293207196Sjilles } 294207196Sjilles } 295165559Sru return error; 296165559Sru} 29760261Ssheldonh 29851090Ssheldonh/* 29951090Ssheldonh * Do an I/O operation to/from a cache block. 30051090Ssheldonh */ 30151090Ssheldonhint 30251090Ssheldonhsmbfs_doio(struct buf *bp, struct ucred *cr, struct thread *td) 303165559Sru{ 30460261Ssheldonh struct vnode *vp = bp->b_vp; 30551090Ssheldonh struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 306165559Sru struct smbnode *np = VTOSMB(vp); 30751090Ssheldonh struct uio uio, *uiop = &uio; 30851090Ssheldonh struct iovec io; 30951090Ssheldonh struct smb_cred scred; 31051090Ssheldonh int error = 0; 31186654Sknu 312142331Strhodes uiop->uio_iov = &io; 31351090Ssheldonh uiop->uio_iovcnt = 1; 31451090Ssheldonh uiop->uio_segflg = UIO_SYSSPACE; 31551090Ssheldonh uiop->uio_td = td; 31651090Ssheldonh 31760261Ssheldonh smb_makescred(&scred, td, cr); 318215520Sjilles 31951090Ssheldonh if (bp->b_iocmd == BIO_READ) { 32051090Ssheldonh io.iov_len = uiop->uio_resid = bp->b_bcount; 32186654Sknu io.iov_base = bp->b_data; 32251090Ssheldonh uiop->uio_rw = UIO_READ; 32386654Sknu switch (vp->v_type) { 32451090Ssheldonh case VREG: 32551090Ssheldonh uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 32651090Ssheldonh error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 32751090Ssheldonh if (error) 32851090Ssheldonh break; 32957714Ssheldonh if (uiop->uio_resid) { 33051090Ssheldonh int left = uiop->uio_resid; 33151090Ssheldonh int nread = bp->b_bcount - left; 33251090Ssheldonh if (left > 0) 333 bzero((char *)bp->b_data + nread, left); 334 } 335 break; 336 default: 337 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 338 break; 339 }; 340 if (error) { 341 bp->b_error = error; 342 bp->b_ioflags |= BIO_ERROR; 343 } 344 } else { /* write */ 345 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 346 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 347 348 if (bp->b_dirtyend > bp->b_dirtyoff) { 349 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 350 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 351 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 352 uiop->uio_rw = UIO_WRITE; 353 bp->b_flags |= B_WRITEINPROG; 354 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 355 bp->b_flags &= ~B_WRITEINPROG; 356 357 /* 358 * For an interrupted write, the buffer is still valid 359 * and the write hasn't been pushed to the server yet, 360 * so we can't set BIO_ERROR and report the interruption 361 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 362 * is not relevant, so the rpc attempt is essentially 363 * a noop. For the case of a V3 write rpc not being 364 * committed to stable storage, the block is still 365 * dirty and requires either a commit rpc or another 366 * write rpc with iomode == NFSV3WRITE_FILESYNC before 367 * the block is reused. This is indicated by setting 368 * the B_DELWRI and B_NEEDCOMMIT flags. 369 */ 370 if (error == EINTR 371 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 372 int s; 373 374 s = splbio(); 375 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 376 if ((bp->b_flags & B_ASYNC) == 0) 377 bp->b_flags |= B_EINTR; 378 if ((bp->b_flags & B_PAGING) == 0) { 379 bdirty(bp); 380 bp->b_flags &= ~B_DONE; 381 } 382 if ((bp->b_flags & B_ASYNC) == 0) 383 bp->b_flags |= B_EINTR; 384 splx(s); 385 } else { 386 if (error) { 387 bp->b_ioflags |= BIO_ERROR; 388 bp->b_error = error; 389 } 390 bp->b_dirtyoff = bp->b_dirtyend = 0; 391 } 392 } else { 393 bp->b_resid = 0; 394 bufdone(bp); 395 return 0; 396 } 397 } 398 bp->b_resid = uiop->uio_resid; 399 bufdone(bp); 400 return error; 401} 402 403/* 404 * Vnode op for VM getpages. 405 * Wish wish .... get rid from multiple IO routines 406 */ 407int 408smbfs_getpages(ap) 409 struct vop_getpages_args /* { 410 struct vnode *a_vp; 411 vm_page_t *a_m; 412 int a_count; 413 int a_reqpage; 414 vm_ooffset_t a_offset; 415 } */ *ap; 416{ 417#ifdef SMBFS_RWGENERIC 418 return vop_stdgetpages(ap); 419#else 420 int i, error, nextoff, size, toff, npages, count, reqpage; 421 struct uio uio; 422 struct iovec iov; 423 vm_offset_t kva; 424 struct buf *bp; 425 struct vnode *vp; 426 struct thread *td; 427 struct ucred *cred; 428 struct smbmount *smp; 429 struct smbnode *np; 430 struct smb_cred scred; 431 vm_page_t *pages, m; 432 433 vp = ap->a_vp; 434 if (vp->v_object == NULL) { 435 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 436 return VM_PAGER_ERROR; 437 } 438 439 td = curthread; /* XXX */ 440 cred = td->td_ucred; /* XXX */ 441 np = VTOSMB(vp); 442 smp = VFSTOSMBFS(vp->v_mount); 443 pages = ap->a_m; 444 count = ap->a_count; 445 npages = btoc(count); 446 reqpage = ap->a_reqpage; 447 448 /* 449 * If the requested page is partially valid, just return it and 450 * allow the pager to zero-out the blanks. Partially valid pages 451 * can only occur at the file EOF. 452 */ 453 m = pages[reqpage]; 454 455 if (m->valid != 0) { 456 /* handled by vm_fault now */ 457 /* vm_page_zero_invalid(m, TRUE); */ 458 vm_page_lock_queues(); 459 for (i = 0; i < npages; ++i) { 460 if (i != reqpage) 461 vm_page_free(pages[i]); 462 } 463 vm_page_unlock_queues(); 464 return 0; 465 } 466 467 smb_makescred(&scred, td, cred); 468 469 bp = getpbuf(&smbfs_pbuf_freecnt); 470 471 kva = (vm_offset_t) bp->b_data; 472 pmap_qenter(kva, pages, npages); 473 cnt.v_vnodein++; 474 cnt.v_vnodepgsin += npages; 475 476 iov.iov_base = (caddr_t) kva; 477 iov.iov_len = count; 478 uio.uio_iov = &iov; 479 uio.uio_iovcnt = 1; 480 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 481 uio.uio_resid = count; 482 uio.uio_segflg = UIO_SYSSPACE; 483 uio.uio_rw = UIO_READ; 484 uio.uio_td = td; 485 486 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 487 pmap_qremove(kva, npages); 488 489 relpbuf(bp, &smbfs_pbuf_freecnt); 490 491 if (error && (uio.uio_resid == count)) { 492 printf("smbfs_getpages: error %d\n",error); 493 vm_page_lock_queues(); 494 for (i = 0; i < npages; i++) { 495 if (reqpage != i) 496 vm_page_free(pages[i]); 497 } 498 vm_page_unlock_queues(); 499 return VM_PAGER_ERROR; 500 } 501 502 size = count - uio.uio_resid; 503 504 vm_page_lock_queues(); 505 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 506 vm_page_t m; 507 nextoff = toff + PAGE_SIZE; 508 m = pages[i]; 509 510 m->flags &= ~PG_ZERO; 511 512 if (nextoff <= size) { 513 /* 514 * Read operation filled an entire page 515 */ 516 m->valid = VM_PAGE_BITS_ALL; 517 vm_page_undirty(m); 518 } else if (size > toff) { 519 /* 520 * Read operation filled a partial page. 521 */ 522 m->valid = 0; 523 vm_page_set_validclean(m, 0, size - toff); 524 /* handled by vm_fault now */ 525 /* vm_page_zero_invalid(m, TRUE); */ 526 } else { 527 /* 528 * Read operation was short. If no error occured 529 * we may have hit a zero-fill section. We simply 530 * leave valid set to 0. 531 */ 532 ; 533 } 534 535 if (i != reqpage) { 536 /* 537 * Whether or not to leave the page activated is up in 538 * the air, but we should put the page on a page queue 539 * somewhere (it already is in the object). Result: 540 * It appears that emperical results show that 541 * deactivating pages is best. 542 */ 543 544 /* 545 * Just in case someone was asking for this page we 546 * now tell them that it is ok to use. 547 */ 548 if (!error) { 549 if (m->flags & PG_WANTED) 550 vm_page_activate(m); 551 else 552 vm_page_deactivate(m); 553 vm_page_wakeup(m); 554 } else { 555 vm_page_free(m); 556 } 557 } 558 } 559 vm_page_unlock_queues(); 560 return 0; 561#endif /* SMBFS_RWGENERIC */ 562} 563 564/* 565 * Vnode op for VM putpages. 566 * possible bug: all IO done in sync mode 567 * Note that vop_close always invalidate pages before close, so it's 568 * not necessary to open vnode. 569 */ 570int 571smbfs_putpages(ap) 572 struct vop_putpages_args /* { 573 struct vnode *a_vp; 574 vm_page_t *a_m; 575 int a_count; 576 int a_sync; 577 int *a_rtvals; 578 vm_ooffset_t a_offset; 579 } */ *ap; 580{ 581 int error; 582 struct vnode *vp = ap->a_vp; 583 struct thread *td; 584 struct ucred *cred; 585 586#ifdef SMBFS_RWGENERIC 587 td = curthread; /* XXX */ 588 cred = td->td_ucred; /* XXX */ 589 VOP_OPEN(vp, FWRITE, cred, td); 590 error = vop_stdputpages(ap); 591 VOP_CLOSE(vp, FWRITE, cred, td); 592 return error; 593#else 594 struct uio uio; 595 struct iovec iov; 596 vm_offset_t kva; 597 struct buf *bp; 598 int i, npages, count; 599 int *rtvals; 600 struct smbmount *smp; 601 struct smbnode *np; 602 struct smb_cred scred; 603 vm_page_t *pages; 604 605 td = curthread; /* XXX */ 606 cred = td->td_ucred; /* XXX */ 607/* VOP_OPEN(vp, FWRITE, cred, td);*/ 608 np = VTOSMB(vp); 609 smp = VFSTOSMBFS(vp->v_mount); 610 pages = ap->a_m; 611 count = ap->a_count; 612 rtvals = ap->a_rtvals; 613 npages = btoc(count); 614 615 for (i = 0; i < npages; i++) { 616 rtvals[i] = VM_PAGER_AGAIN; 617 } 618 619 bp = getpbuf(&smbfs_pbuf_freecnt); 620 621 kva = (vm_offset_t) bp->b_data; 622 pmap_qenter(kva, pages, npages); 623 cnt.v_vnodeout++; 624 cnt.v_vnodepgsout += count; 625 626 iov.iov_base = (caddr_t) kva; 627 iov.iov_len = count; 628 uio.uio_iov = &iov; 629 uio.uio_iovcnt = 1; 630 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 631 uio.uio_resid = count; 632 uio.uio_segflg = UIO_SYSSPACE; 633 uio.uio_rw = UIO_WRITE; 634 uio.uio_td = td; 635 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 636 637 smb_makescred(&scred, td, cred); 638 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 639/* VOP_CLOSE(vp, FWRITE, cred, td);*/ 640 SMBVDEBUG("paged write done: %d\n", error); 641 642 pmap_qremove(kva, npages); 643 644 relpbuf(bp, &smbfs_pbuf_freecnt); 645 646 if (!error) { 647 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 648 vm_page_lock_queues(); 649 for (i = 0; i < nwritten; i++) { 650 rtvals[i] = VM_PAGER_OK; 651 vm_page_undirty(pages[i]); 652 } 653 vm_page_unlock_queues(); 654 } 655 return rtvals[0]; 656#endif /* SMBFS_RWGENERIC */ 657} 658 659/* 660 * Flush and invalidate all dirty buffers. If another process is already 661 * doing the flush, just wait for completion. 662 */ 663int 664smbfs_vinvalbuf(vp, flags, cred, td, intrflg) 665 struct vnode *vp; 666 int flags; 667 struct ucred *cred; 668 struct thread *td; 669 int intrflg; 670{ 671 struct smbnode *np = VTOSMB(vp); 672 int error = 0, slpflag, slptimeo; 673 674 VI_LOCK(vp); 675 if (vp->v_iflag & VI_XLOCK) { 676 VI_UNLOCK(vp); 677 return 0; 678 } 679 VI_UNLOCK(vp); 680 681 if (intrflg) { 682 slpflag = PCATCH; 683 slptimeo = 2 * hz; 684 } else { 685 slpflag = 0; 686 slptimeo = 0; 687 } 688 while (np->n_flag & NFLUSHINPROG) { 689 np->n_flag |= NFLUSHWANT; 690 error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo); 691 error = smb_proc_intr(td->td_proc); 692 if (error == EINTR && intrflg) 693 return EINTR; 694 } 695 np->n_flag |= NFLUSHINPROG; 696 error = vinvalbuf(vp, flags, cred, td, slpflag, 0); 697 while (error) { 698 if (intrflg && (error == ERESTART || error == EINTR)) { 699 np->n_flag &= ~NFLUSHINPROG; 700 if (np->n_flag & NFLUSHWANT) { 701 np->n_flag &= ~NFLUSHWANT; 702 wakeup((caddr_t)&np->n_flag); 703 } 704 return EINTR; 705 } 706 error = vinvalbuf(vp, flags, cred, td, slpflag, 0); 707 } 708 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 709 if (np->n_flag & NFLUSHWANT) { 710 np->n_flag &= ~NFLUSHWANT; 711 wakeup((caddr_t)&np->n_flag); 712 } 713 return (error); 714} 715