1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* internal AFS stuff
3 *
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <linux/compiler.h>
9#include <linux/kernel.h>
10#include <linux/ktime.h>
11#include <linux/fs.h>
12#include <linux/pagemap.h>
13#include <linux/rxrpc.h>
14#include <linux/key.h>
15#include <linux/workqueue.h>
16#include <linux/sched.h>
17#include <linux/fscache.h>
18#include <linux/backing-dev.h>
19#include <linux/uuid.h>
20#include <linux/mm_types.h>
21#include <linux/dns_resolver.h>
22#include <net/net_namespace.h>
23#include <net/netns/generic.h>
24#include <net/sock.h>
25#include <net/af_rxrpc.h>
26
27#include "afs.h"
28#include "afs_vl.h"
29
30#define AFS_CELL_MAX_ADDRS 15
31
32struct pagevec;
33struct afs_call;
34struct afs_vnode;
35
36/*
37 * Partial file-locking emulation mode.  (The problem being that AFS3 only
38 * allows whole-file locks and no upgrading/downgrading).
39 */
40enum afs_flock_mode {
41	afs_flock_mode_unset,
42	afs_flock_mode_local,	/* Local locking only */
43	afs_flock_mode_openafs,	/* Don't get server lock for a partial lock */
44	afs_flock_mode_strict,	/* Always get a server lock for a partial lock */
45	afs_flock_mode_write,	/* Get an exclusive server lock for a partial lock */
46};
47
48struct afs_fs_context {
49	bool			force;		/* T to force cell type */
50	bool			autocell;	/* T if set auto mount operation */
51	bool			dyn_root;	/* T if dynamic root */
52	bool			no_cell;	/* T if the source is "none" (for dynroot) */
53	enum afs_flock_mode	flock_mode;	/* Partial file-locking emulation mode */
54	afs_voltype_t		type;		/* type of volume requested */
55	unsigned int		volnamesz;	/* size of volume name */
56	const char		*volname;	/* name of volume to mount */
57	struct afs_net		*net;		/* the AFS net namespace stuff */
58	struct afs_cell		*cell;		/* cell in which to find volume */
59	struct afs_volume	*volume;	/* volume record */
60	struct key		*key;		/* key to use for secure mounting */
61};
62
63enum afs_call_state {
64	AFS_CALL_CL_REQUESTING,		/* Client: Request is being sent */
65	AFS_CALL_CL_AWAIT_REPLY,	/* Client: Awaiting reply */
66	AFS_CALL_CL_PROC_REPLY,		/* Client: rxrpc call complete; processing reply */
67	AFS_CALL_SV_AWAIT_OP_ID,	/* Server: Awaiting op ID */
68	AFS_CALL_SV_AWAIT_REQUEST,	/* Server: Awaiting request data */
69	AFS_CALL_SV_REPLYING,		/* Server: Replying */
70	AFS_CALL_SV_AWAIT_ACK,		/* Server: Awaiting final ACK */
71	AFS_CALL_COMPLETE,		/* Completed or failed */
72};
73
74/*
75 * List of server addresses.
76 */
77struct afs_addr_list {
78	struct rcu_head		rcu;
79	refcount_t		usage;
80	u32			version;	/* Version */
81	unsigned char		max_addrs;
82	unsigned char		nr_addrs;
83	unsigned char		preferred;	/* Preferred address */
84	unsigned char		nr_ipv4;	/* Number of IPv4 addresses */
85	enum dns_record_source	source:8;
86	enum dns_lookup_status	status:8;
87	unsigned long		failed;		/* Mask of addrs that failed locally/ICMP */
88	unsigned long		responded;	/* Mask of addrs that responded */
89	struct sockaddr_rxrpc	addrs[];
90#define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
91};
92
93/*
94 * a record of an in-progress RxRPC call
95 */
96struct afs_call {
97	const struct afs_call_type *type;	/* type of call */
98	struct afs_addr_list	*alist;		/* Address is alist[addr_ix] */
99	wait_queue_head_t	waitq;		/* processes awaiting completion */
100	struct work_struct	async_work;	/* async I/O processor */
101	struct work_struct	work;		/* actual work processor */
102	struct rxrpc_call	*rxcall;	/* RxRPC call handle */
103	struct key		*key;		/* security for this call */
104	struct afs_net		*net;		/* The network namespace */
105	struct afs_server	*server;	/* The fileserver record if fs op (pins ref) */
106	struct afs_vlserver	*vlserver;	/* The vlserver record if vl op */
107	void			*request;	/* request data (first part) */
108	size_t			iov_len;	/* Size of *iter to be used */
109	struct iov_iter		def_iter;	/* Default buffer/data iterator */
110	struct iov_iter		*write_iter;	/* Iterator defining write to be made */
111	struct iov_iter		*iter;		/* Iterator currently in use */
112	union {	/* Convenience for ->def_iter */
113		struct kvec	kvec[1];
114		struct bio_vec	bvec[1];
115	};
116	void			*buffer;	/* reply receive buffer */
117	union {
118		long			ret0;	/* Value to reply with instead of 0 */
119		struct afs_addr_list	*ret_alist;
120		struct afs_vldb_entry	*ret_vldb;
121		char			*ret_str;
122	};
123	struct afs_operation	*op;
124	unsigned int		server_index;
125	atomic_t		usage;
126	enum afs_call_state	state;
127	spinlock_t		state_lock;
128	int			error;		/* error code */
129	u32			abort_code;	/* Remote abort ID or 0 */
130	unsigned int		max_lifespan;	/* Maximum lifespan to set if not 0 */
131	unsigned		request_size;	/* size of request data */
132	unsigned		reply_max;	/* maximum size of reply */
133	unsigned		count2;		/* count used in unmarshalling */
134	unsigned char		unmarshall;	/* unmarshalling phase */
135	unsigned char		addr_ix;	/* Address in ->alist */
136	bool			drop_ref;	/* T if need to drop ref for incoming call */
137	bool			need_attention;	/* T if RxRPC poked us */
138	bool			async;		/* T if asynchronous */
139	bool			upgrade;	/* T to request service upgrade */
140	bool			have_reply_time; /* T if have got reply_time */
141	bool			intr;		/* T if interruptible */
142	bool			unmarshalling_error; /* T if an unmarshalling error occurred */
143	u16			service_id;	/* Actual service ID (after upgrade) */
144	unsigned int		debug_id;	/* Trace ID */
145	u32			operation_ID;	/* operation ID for an incoming call */
146	u32			count;		/* count for use in unmarshalling */
147	union {					/* place to extract temporary data */
148		struct {
149			__be32	tmp_u;
150			__be32	tmp;
151		} __attribute__((packed));
152		__be64		tmp64;
153	};
154	ktime_t			reply_time;	/* Time of first reply packet */
155};
156
157struct afs_call_type {
158	const char *name;
159	unsigned int op; /* Really enum afs_fs_operation */
160
161	/* deliver request or reply data to an call
162	 * - returning an error will cause the call to be aborted
163	 */
164	int (*deliver)(struct afs_call *call);
165
166	/* clean up a call */
167	void (*destructor)(struct afs_call *call);
168
169	/* Work function */
170	void (*work)(struct work_struct *work);
171
172	/* Call done function (gets called immediately on success or failure) */
173	void (*done)(struct afs_call *call);
174};
175
176/*
177 * Key available for writeback on a file.
178 */
179struct afs_wb_key {
180	refcount_t		usage;
181	struct key		*key;
182	struct list_head	vnode_link;	/* Link in vnode->wb_keys */
183};
184
185/*
186 * AFS open file information record.  Pointed to by file->private_data.
187 */
188struct afs_file {
189	struct key		*key;		/* The key this file was opened with */
190	struct afs_wb_key	*wb;		/* Writeback key record for this file */
191};
192
193static inline struct key *afs_file_key(struct file *file)
194{
195	struct afs_file *af = file->private_data;
196
197	return af->key;
198}
199
200/*
201 * Record of an outstanding read operation on a vnode.
202 */
203struct afs_read {
204	loff_t			pos;		/* Where to start reading */
205	loff_t			len;		/* How much we're asking for */
206	loff_t			actual_len;	/* How much we're actually getting */
207	loff_t			file_size;	/* File size returned by server */
208	struct key		*key;		/* The key to use to reissue the read */
209	struct afs_vnode	*vnode;		/* The file being read into. */
210	struct netfs_read_subrequest *subreq;	/* Fscache helper read request this belongs to */
211	afs_dataversion_t	data_version;	/* Version number returned by server */
212	refcount_t		usage;
213	unsigned int		call_debug_id;
214	unsigned int		nr_pages;
215	int			error;
216	void (*done)(struct afs_read *);
217	void (*cleanup)(struct afs_read *);
218	struct iov_iter		*iter;		/* Iterator representing the buffer */
219	struct iov_iter		def_iter;	/* Default iterator */
220};
221
222/*
223 * AFS superblock private data
224 * - there's one superblock per volume
225 */
226struct afs_super_info {
227	struct net		*net_ns;	/* Network namespace */
228	struct afs_cell		*cell;		/* The cell in which the volume resides */
229	struct afs_volume	*volume;	/* volume record */
230	enum afs_flock_mode	flock_mode:8;	/* File locking emulation mode */
231	bool			dyn_root;	/* True if dynamic root */
232};
233
234static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
235{
236	return sb->s_fs_info;
237}
238
239extern struct file_system_type afs_fs_type;
240
241/*
242 * Set of substitutes for @sys.
243 */
244struct afs_sysnames {
245#define AFS_NR_SYSNAME 16
246	char			*subs[AFS_NR_SYSNAME];
247	refcount_t		usage;
248	unsigned short		nr;
249	char			blank[1];
250};
251
252/*
253 * AFS network namespace record.
254 */
255struct afs_net {
256	struct net		*net;		/* Backpointer to the owning net namespace */
257	struct afs_uuid		uuid;
258	bool			live;		/* F if this namespace is being removed */
259
260	/* AF_RXRPC I/O stuff */
261	struct socket		*socket;
262	struct afs_call		*spare_incoming_call;
263	struct work_struct	charge_preallocation_work;
264	struct mutex		socket_mutex;
265	atomic_t		nr_outstanding_calls;
266	atomic_t		nr_superblocks;
267
268	/* Cell database */
269	struct rb_root		cells;
270	struct afs_cell		*ws_cell;
271	struct work_struct	cells_manager;
272	struct timer_list	cells_timer;
273	atomic_t		cells_outstanding;
274	struct rw_semaphore	cells_lock;
275	struct mutex		cells_alias_lock;
276
277	struct mutex		proc_cells_lock;
278	struct hlist_head	proc_cells;
279
280	/* Known servers.  Theoretically each fileserver can only be in one
281	 * cell, but in practice, people create aliases and subsets and there's
282	 * no easy way to distinguish them.
283	 */
284	seqlock_t		fs_lock;	/* For fs_servers, fs_probe_*, fs_proc */
285	struct rb_root		fs_servers;	/* afs_server (by server UUID or address) */
286	struct list_head	fs_probe_fast;	/* List of afs_server to probe at 30s intervals */
287	struct list_head	fs_probe_slow;	/* List of afs_server to probe at 5m intervals */
288	struct hlist_head	fs_proc;	/* procfs servers list */
289
290	struct hlist_head	fs_addresses4;	/* afs_server (by lowest IPv4 addr) */
291	struct hlist_head	fs_addresses6;	/* afs_server (by lowest IPv6 addr) */
292	seqlock_t		fs_addr_lock;	/* For fs_addresses[46] */
293
294	struct work_struct	fs_manager;
295	struct timer_list	fs_timer;
296
297	struct work_struct	fs_prober;
298	struct timer_list	fs_probe_timer;
299	atomic_t		servers_outstanding;
300
301	/* File locking renewal management */
302	struct mutex		lock_manager_mutex;
303
304	/* Misc */
305	struct super_block	*dynroot_sb;	/* Dynamic root mount superblock */
306	struct proc_dir_entry	*proc_afs;	/* /proc/net/afs directory */
307	struct afs_sysnames	*sysnames;
308	rwlock_t		sysnames_lock;
309
310	/* Statistics counters */
311	atomic_t		n_lookup;	/* Number of lookups done */
312	atomic_t		n_reval;	/* Number of dentries needing revalidation */
313	atomic_t		n_inval;	/* Number of invalidations by the server */
314	atomic_t		n_relpg;	/* Number of invalidations by releasepage */
315	atomic_t		n_read_dir;	/* Number of directory pages read */
316	atomic_t		n_dir_cr;	/* Number of directory entry creation edits */
317	atomic_t		n_dir_rm;	/* Number of directory entry removal edits */
318	atomic_t		n_stores;	/* Number of store ops */
319	atomic_long_t		n_store_bytes;	/* Number of bytes stored */
320	atomic_long_t		n_fetch_bytes;	/* Number of bytes fetched */
321	atomic_t		n_fetches;	/* Number of data fetch ops */
322};
323
324extern const char afs_init_sysname[];
325
326enum afs_cell_state {
327	AFS_CELL_UNSET,
328	AFS_CELL_ACTIVATING,
329	AFS_CELL_ACTIVE,
330	AFS_CELL_DEACTIVATING,
331	AFS_CELL_INACTIVE,
332	AFS_CELL_FAILED,
333	AFS_CELL_REMOVED,
334};
335
336/*
337 * AFS cell record.
338 *
339 * This is a tricky concept to get right as it is possible to create aliases
340 * simply by pointing AFSDB/SRV records for two names at the same set of VL
341 * servers; it is also possible to do things like setting up two sets of VL
342 * servers, one of which provides a superset of the volumes provided by the
343 * other (for internal/external division, for example).
344 *
345 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
346 * servers and (b) a cell's name is used by the client to select the key to use
347 * for authentication and encryption.  The cell name is not typically used in
348 * the protocol.
349 *
350 * Two cells are determined to be aliases if they have an explicit alias (YFS
351 * only), share any VL servers in common or have at least one volume in common.
352 * "In common" means that the address list of the VL servers or the fileservers
353 * share at least one endpoint.
354 */
355struct afs_cell {
356	union {
357		struct rcu_head	rcu;
358		struct rb_node	net_node;	/* Node in net->cells */
359	};
360	struct afs_net		*net;
361	struct afs_cell		*alias_of;	/* The cell this is an alias of */
362	struct afs_volume	*root_volume;	/* The root.cell volume if there is one */
363	struct key		*anonymous_key;	/* anonymous user key for this cell */
364	struct work_struct	manager;	/* Manager for init/deinit/dns */
365	struct hlist_node	proc_link;	/* /proc cell list link */
366	time64_t		dns_expiry;	/* Time AFSDB/SRV record expires */
367	time64_t		last_inactive;	/* Time of last drop of usage count */
368	atomic_t		ref;		/* Struct refcount */
369	atomic_t		active;		/* Active usage counter */
370	unsigned long		flags;
371#define AFS_CELL_FL_NO_GC	0		/* The cell was added manually, don't auto-gc */
372#define AFS_CELL_FL_DO_LOOKUP	1		/* DNS lookup requested */
373#define AFS_CELL_FL_CHECK_ALIAS	2		/* Need to check for aliases */
374	enum afs_cell_state	state;
375	short			error;
376	enum dns_record_source	dns_source:8;	/* Latest source of data from lookup */
377	enum dns_lookup_status	dns_status:8;	/* Latest status of data from lookup */
378	unsigned int		dns_lookup_count; /* Counter of DNS lookups */
379	unsigned int		debug_id;
380
381	/* The volumes belonging to this cell */
382	struct rb_root		volumes;	/* Tree of volumes on this server */
383	struct hlist_head	proc_volumes;	/* procfs volume list */
384	seqlock_t		volume_lock;	/* For volumes */
385
386	/* Active fileserver interaction state. */
387	struct rb_root		fs_servers;	/* afs_server (by server UUID) */
388	seqlock_t		fs_lock;	/* For fs_servers  */
389	struct rw_semaphore	fs_open_mmaps_lock;
390	struct list_head	fs_open_mmaps;	/* List of vnodes that are mmapped */
391	atomic_t		fs_s_break;	/* Counter of CB.InitCallBackState messages */
392
393	/* VL server list. */
394	rwlock_t		vl_servers_lock; /* Lock on vl_servers */
395	struct afs_vlserver_list __rcu *vl_servers;
396
397	u8			name_len;	/* Length of name */
398	char			*name;		/* Cell name, case-flattened and NUL-padded */
399};
400
401/*
402 * Volume Location server record.
403 */
404struct afs_vlserver {
405	struct rcu_head		rcu;
406	struct afs_addr_list	__rcu *addresses; /* List of addresses for this VL server */
407	unsigned long		flags;
408#define AFS_VLSERVER_FL_PROBED	0		/* The VL server has been probed */
409#define AFS_VLSERVER_FL_PROBING	1		/* VL server is being probed */
410#define AFS_VLSERVER_FL_IS_YFS	2		/* Server is YFS not AFS */
411#define AFS_VLSERVER_FL_RESPONDING 3		/* VL server is responding */
412	rwlock_t		lock;		/* Lock on addresses */
413	atomic_t		usage;
414	unsigned int		rtt;		/* Server's current RTT in uS */
415
416	/* Probe state */
417	wait_queue_head_t	probe_wq;
418	atomic_t		probe_outstanding;
419	spinlock_t		probe_lock;
420	struct {
421		unsigned int	rtt;		/* RTT in uS */
422		u32		abort_code;
423		short		error;
424		unsigned short	flags;
425#define AFS_VLSERVER_PROBE_RESPONDED		0x01 /* At least once response (may be abort) */
426#define AFS_VLSERVER_PROBE_IS_YFS		0x02 /* The peer appears to be YFS */
427#define AFS_VLSERVER_PROBE_NOT_YFS		0x04 /* The peer appears not to be YFS */
428#define AFS_VLSERVER_PROBE_LOCAL_FAILURE	0x08 /* A local failure prevented a probe */
429	} probe;
430
431	u16			port;
432	u16			name_len;	/* Length of name */
433	char			name[];		/* Server name, case-flattened */
434};
435
436/*
437 * Weighted list of Volume Location servers.
438 */
439struct afs_vlserver_entry {
440	u16			priority;	/* Preference (as SRV) */
441	u16			weight;		/* Weight (as SRV) */
442	enum dns_record_source	source:8;
443	enum dns_lookup_status	status:8;
444	struct afs_vlserver	*server;
445};
446
447struct afs_vlserver_list {
448	struct rcu_head		rcu;
449	atomic_t		usage;
450	u8			nr_servers;
451	u8			index;		/* Server currently in use */
452	u8			preferred;	/* Preferred server */
453	enum dns_record_source	source:8;
454	enum dns_lookup_status	status:8;
455	rwlock_t		lock;
456	struct afs_vlserver_entry servers[];
457};
458
459/*
460 * Cached VLDB entry.
461 *
462 * This is pointed to by cell->vldb_entries, indexed by name.
463 */
464struct afs_vldb_entry {
465	afs_volid_t		vid[3];		/* Volume IDs for R/W, R/O and Bak volumes */
466
467	unsigned long		flags;
468#define AFS_VLDB_HAS_RW		0		/* - R/W volume exists */
469#define AFS_VLDB_HAS_RO		1		/* - R/O volume exists */
470#define AFS_VLDB_HAS_BAK	2		/* - Backup volume exists */
471#define AFS_VLDB_QUERY_VALID	3		/* - Record is valid */
472#define AFS_VLDB_QUERY_ERROR	4		/* - VL server returned error */
473
474	uuid_t			fs_server[AFS_NMAXNSERVERS];
475	u32			addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */
476	u8			fs_mask[AFS_NMAXNSERVERS];
477#define AFS_VOL_VTM_RW	0x01 /* R/W version of the volume is available (on this server) */
478#define AFS_VOL_VTM_RO	0x02 /* R/O version of the volume is available (on this server) */
479#define AFS_VOL_VTM_BAK	0x04 /* backup version of the volume is available (on this server) */
480	short			error;
481	u8			nr_servers;	/* Number of server records */
482	u8			name_len;
483	u8			name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
484};
485
486/*
487 * Record of fileserver with which we're actively communicating.
488 */
489struct afs_server {
490	struct rcu_head		rcu;
491	union {
492		uuid_t		uuid;		/* Server ID */
493		struct afs_uuid	_uuid;
494	};
495
496	struct afs_addr_list	__rcu *addresses;
497	struct afs_cell		*cell;		/* Cell to which belongs (pins ref) */
498	struct rb_node		uuid_rb;	/* Link in net->fs_servers */
499	struct afs_server __rcu	*uuid_next;	/* Next server with same UUID */
500	struct afs_server	*uuid_prev;	/* Previous server with same UUID */
501	struct list_head	probe_link;	/* Link in net->fs_probe_list */
502	struct hlist_node	addr4_link;	/* Link in net->fs_addresses4 */
503	struct hlist_node	addr6_link;	/* Link in net->fs_addresses6 */
504	struct hlist_node	proc_link;	/* Link in net->fs_proc */
505	struct work_struct	initcb_work;	/* Work for CB.InitCallBackState* */
506	struct afs_server	*gc_next;	/* Next server in manager's list */
507	time64_t		unuse_time;	/* Time at which last unused */
508	unsigned long		flags;
509#define AFS_SERVER_FL_RESPONDING 0		/* The server is responding */
510#define AFS_SERVER_FL_UPDATING	1
511#define AFS_SERVER_FL_NEEDS_UPDATE 2		/* Fileserver address list is out of date */
512#define AFS_SERVER_FL_NOT_READY	4		/* The record is not ready for use */
513#define AFS_SERVER_FL_NOT_FOUND	5		/* VL server says no such server */
514#define AFS_SERVER_FL_VL_FAIL	6		/* Failed to access VL server */
515#define AFS_SERVER_FL_MAY_HAVE_CB 8		/* May have callbacks on this fileserver */
516#define AFS_SERVER_FL_IS_YFS	16		/* Server is YFS not AFS */
517#define AFS_SERVER_FL_NO_IBULK	17		/* Fileserver doesn't support FS.InlineBulkStatus */
518#define AFS_SERVER_FL_NO_RM2	18		/* Fileserver doesn't support YFS.RemoveFile2 */
519#define AFS_SERVER_FL_HAS_FS64	19		/* Fileserver supports FS.{Fetch,Store}Data64 */
520	atomic_t		ref;		/* Object refcount */
521	atomic_t		active;		/* Active user count */
522	u32			addr_version;	/* Address list version */
523	unsigned int		rtt;		/* Server's current RTT in uS */
524	unsigned int		debug_id;	/* Debugging ID for traces */
525
526	/* file service access */
527	rwlock_t		fs_lock;	/* access lock */
528
529	/* callback promise management */
530	unsigned		cb_s_break;	/* Break-everything counter. */
531
532	/* Probe state */
533	unsigned long		probed_at;	/* Time last probe was dispatched (jiffies) */
534	wait_queue_head_t	probe_wq;
535	atomic_t		probe_outstanding;
536	spinlock_t		probe_lock;
537	struct {
538		unsigned int	rtt;		/* RTT in uS */
539		u32		abort_code;
540		short		error;
541		bool		responded:1;
542		bool		is_yfs:1;
543		bool		not_yfs:1;
544		bool		local_failure:1;
545	} probe;
546};
547
548/*
549 * Replaceable volume server list.
550 */
551struct afs_server_entry {
552	struct afs_server	*server;
553};
554
555struct afs_server_list {
556	afs_volid_t		vids[AFS_MAXTYPES]; /* Volume IDs */
557	refcount_t		usage;
558	unsigned char		nr_servers;
559	unsigned char		preferred;	/* Preferred server */
560	unsigned short		vnovol_mask;	/* Servers to be skipped due to VNOVOL */
561	unsigned int		seq;		/* Set to ->servers_seq when installed */
562	rwlock_t		lock;
563	struct afs_server_entry	servers[];
564};
565
566/*
567 * Live AFS volume management.
568 */
569struct afs_volume {
570	union {
571		struct rcu_head	rcu;
572		afs_volid_t	vid;		/* volume ID */
573	};
574	atomic_t		usage;
575	time64_t		update_at;	/* Time at which to next update */
576	struct afs_cell		*cell;		/* Cell to which belongs (pins ref) */
577	struct rb_node		cell_node;	/* Link in cell->volumes */
578	struct hlist_node	proc_link;	/* Link in cell->proc_volumes */
579	struct super_block __rcu *sb;		/* Superblock on which inodes reside */
580	unsigned long		flags;
581#define AFS_VOLUME_NEEDS_UPDATE	0	/* - T if an update needs performing */
582#define AFS_VOLUME_UPDATING	1	/* - T if an update is in progress */
583#define AFS_VOLUME_WAIT		2	/* - T if users must wait for update */
584#define AFS_VOLUME_DELETED	3	/* - T if volume appears deleted */
585#define AFS_VOLUME_OFFLINE	4	/* - T if volume offline notice given */
586#define AFS_VOLUME_BUSY		5	/* - T if volume busy notice given */
587#define AFS_VOLUME_MAYBE_NO_IBULK 6	/* - T if some servers don't have InlineBulkStatus */
588#ifdef CONFIG_AFS_FSCACHE
589	struct fscache_volume	*cache;		/* Caching cookie */
590#endif
591	struct afs_server_list __rcu *servers;	/* List of servers on which volume resides */
592	rwlock_t		servers_lock;	/* Lock for ->servers */
593	unsigned int		servers_seq;	/* Incremented each time ->servers changes */
594
595	unsigned		cb_v_break;	/* Break-everything counter. */
596	rwlock_t		cb_v_break_lock;
597
598	afs_voltype_t		type;		/* type of volume */
599	char			type_force;	/* force volume type (suppress R/O -> R/W) */
600	u8			name_len;
601	u8			name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
602};
603
604enum afs_lock_state {
605	AFS_VNODE_LOCK_NONE,		/* The vnode has no lock on the server */
606	AFS_VNODE_LOCK_WAITING_FOR_CB,	/* We're waiting for the server to break the callback */
607	AFS_VNODE_LOCK_SETTING,		/* We're asking the server for a lock */
608	AFS_VNODE_LOCK_GRANTED,		/* We have a lock on the server */
609	AFS_VNODE_LOCK_EXTENDING,	/* We're extending a lock on the server */
610	AFS_VNODE_LOCK_NEED_UNLOCK,	/* We need to unlock on the server */
611	AFS_VNODE_LOCK_UNLOCKING,	/* We're telling the server to unlock */
612	AFS_VNODE_LOCK_DELETED,		/* The vnode has been deleted whilst we have a lock */
613};
614
615/*
616 * AFS inode private data.
617 *
618 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
619 * leak from one inode to another.
620 */
621struct afs_vnode {
622	struct inode		vfs_inode;	/* the VFS's inode record */
623
624	struct afs_volume	*volume;	/* volume on which vnode resides */
625	struct afs_fid		fid;		/* the file identifier for this inode */
626	struct afs_file_status	status;		/* AFS status info for this file */
627	afs_dataversion_t	invalid_before;	/* Child dentries are invalid before this */
628#ifdef CONFIG_AFS_FSCACHE
629	struct fscache_cookie	*cache;		/* caching cookie */
630#endif
631	struct afs_permits __rcu *permit_cache;	/* cache of permits so far obtained */
632	struct mutex		io_lock;	/* Lock for serialising I/O on this mutex */
633	struct rw_semaphore	validate_lock;	/* lock for validating this vnode */
634	struct rw_semaphore	rmdir_lock;	/* Lock for rmdir vs sillyrename */
635	struct key		*silly_key;	/* Silly rename key */
636	spinlock_t		wb_lock;	/* lock for wb_keys */
637	spinlock_t		lock;		/* waitqueue/flags lock */
638	unsigned long		flags;
639#define AFS_VNODE_CB_PROMISED	0		/* Set if vnode has a callback promise */
640#define AFS_VNODE_UNSET		1		/* set if vnode attributes not yet set */
641#define AFS_VNODE_DIR_VALID	2		/* Set if dir contents are valid */
642#define AFS_VNODE_ZAP_DATA	3		/* set if vnode's data should be invalidated */
643#define AFS_VNODE_DELETED	4		/* set if vnode deleted on server */
644#define AFS_VNODE_MOUNTPOINT	5		/* set if vnode is a mountpoint symlink */
645#define AFS_VNODE_AUTOCELL	6		/* set if Vnode is an auto mount point */
646#define AFS_VNODE_PSEUDODIR	7 		/* set if Vnode is a pseudo directory */
647#define AFS_VNODE_NEW_CONTENT	8		/* Set if file has new content (create/trunc-0) */
648#define AFS_VNODE_SILLY_DELETED	9		/* Set if file has been silly-deleted */
649#define AFS_VNODE_MODIFYING	10		/* Set if we're performing a modification op */
650
651	struct list_head	wb_keys;	/* List of keys available for writeback */
652	struct list_head	pending_locks;	/* locks waiting to be granted */
653	struct list_head	granted_locks;	/* locks granted on this file */
654	struct delayed_work	lock_work;	/* work to be done in locking */
655	struct key		*lock_key;	/* Key to be used in lock ops */
656	ktime_t			locked_at;	/* Time at which lock obtained */
657	enum afs_lock_state	lock_state : 8;
658	afs_lock_type_t		lock_type : 8;
659
660	/* outstanding callback notification on this file */
661	struct work_struct	cb_work;	/* Work for mmap'd files */
662	struct list_head	cb_mmap_link;	/* Link in cell->fs_open_mmaps */
663	void			*cb_server;	/* Server with callback/filelock */
664	atomic_t		cb_nr_mmap;	/* Number of mmaps */
665	unsigned int		cb_fs_s_break;	/* Mass server break counter (cell->fs_s_break) */
666	unsigned int		cb_s_break;	/* Mass break counter on ->server */
667	unsigned int		cb_v_break;	/* Mass break counter on ->volume */
668	unsigned int		cb_break;	/* Break counter on vnode */
669	seqlock_t		cb_lock;	/* Lock for ->cb_server, ->status, ->cb_*break */
670
671	time64_t		cb_expires_at;	/* time at which callback expires */
672};
673
674static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
675{
676#ifdef CONFIG_AFS_FSCACHE
677	return vnode->cache;
678#else
679	return NULL;
680#endif
681}
682
683/*
684 * cached security record for one user's attempt to access a vnode
685 */
686struct afs_permit {
687	struct key		*key;		/* RxRPC ticket holding a security context */
688	afs_access_t		access;		/* CallerAccess value for this key */
689};
690
691/*
692 * Immutable cache of CallerAccess records from attempts to access vnodes.
693 * These may be shared between multiple vnodes.
694 */
695struct afs_permits {
696	struct rcu_head		rcu;
697	struct hlist_node	hash_node;	/* Link in hash */
698	unsigned long		h;		/* Hash value for this permit list */
699	refcount_t		usage;
700	unsigned short		nr_permits;	/* Number of records */
701	bool			invalidated;	/* Invalidated due to key change */
702	struct afs_permit	permits[];	/* List of permits sorted by key pointer */
703};
704
705/*
706 * Error prioritisation and accumulation.
707 */
708struct afs_error {
709	short	error;			/* Accumulated error */
710	bool	responded;		/* T if server responded */
711};
712
713/*
714 * Cursor for iterating over a server's address list.
715 */
716struct afs_addr_cursor {
717	struct afs_addr_list	*alist;		/* Current address list (pins ref) */
718	unsigned long		tried;		/* Tried addresses */
719	signed char		index;		/* Current address */
720	bool			responded;	/* T if the current address responded */
721	unsigned short		nr_iterations;	/* Number of address iterations */
722	short			error;
723	u32			abort_code;
724};
725
726/*
727 * Cursor for iterating over a set of volume location servers.
728 */
729struct afs_vl_cursor {
730	struct afs_addr_cursor	ac;
731	struct afs_cell		*cell;		/* The cell we're querying */
732	struct afs_vlserver_list *server_list;	/* Current server list (pins ref) */
733	struct afs_vlserver	*server;	/* Server on which this resides */
734	struct key		*key;		/* Key for the server */
735	unsigned long		untried;	/* Bitmask of untried servers */
736	short			index;		/* Current server */
737	short			error;
738	unsigned short		flags;
739#define AFS_VL_CURSOR_STOP	0x0001		/* Set to cease iteration */
740#define AFS_VL_CURSOR_RETRY	0x0002		/* Set to do a retry */
741#define AFS_VL_CURSOR_RETRIED	0x0004		/* Set if started a retry */
742	unsigned short		nr_iterations;	/* Number of server iterations */
743};
744
745/*
746 * Fileserver operation methods.
747 */
748struct afs_operation_ops {
749	void (*issue_afs_rpc)(struct afs_operation *op);
750	void (*issue_yfs_rpc)(struct afs_operation *op);
751	void (*success)(struct afs_operation *op);
752	void (*aborted)(struct afs_operation *op);
753	void (*failed)(struct afs_operation *op);
754	void (*edit_dir)(struct afs_operation *op);
755	void (*put)(struct afs_operation *op);
756};
757
758struct afs_vnode_param {
759	struct afs_vnode	*vnode;
760	struct afs_fid		fid;		/* Fid to access */
761	struct afs_status_cb	scb;		/* Returned status and callback promise */
762	afs_dataversion_t	dv_before;	/* Data version before the call */
763	unsigned int		cb_break_before; /* cb_break + cb_s_break before the call */
764	u8			dv_delta;	/* Expected change in data version */
765	bool			put_vnode:1;	/* T if we have a ref on the vnode */
766	bool			need_io_lock:1;	/* T if we need the I/O lock on this */
767	bool			update_ctime:1;	/* Need to update the ctime */
768	bool			set_size:1;	/* Must update i_size */
769	bool			op_unlinked:1;	/* True if file was unlinked by op */
770	bool			speculative:1;	/* T if speculative status fetch (no vnode lock) */
771	bool			modification:1;	/* Set if the content gets modified */
772};
773
774/*
775 * Fileserver operation wrapper, handling server and address rotation
776 * asynchronously.  May make simultaneous calls to multiple servers.
777 */
778struct afs_operation {
779	struct afs_net		*net;		/* Network namespace */
780	struct key		*key;		/* Key for the cell */
781	const struct afs_call_type *type;	/* Type of call done */
782	const struct afs_operation_ops *ops;
783
784	/* Parameters/results for the operation */
785	struct afs_volume	*volume;	/* Volume being accessed */
786	struct afs_vnode_param	file[2];
787	struct afs_vnode_param	*more_files;
788	struct afs_volsync	volsync;
789	struct dentry		*dentry;	/* Dentry to be altered */
790	struct dentry		*dentry_2;	/* Second dentry to be altered */
791	struct timespec64	mtime;		/* Modification time to record */
792	struct timespec64	ctime;		/* Change time to set */
793	short			nr_files;	/* Number of entries in file[], more_files */
794	short			error;
795	unsigned int		debug_id;
796
797	unsigned int		cb_v_break;	/* Volume break counter before op */
798	unsigned int		cb_s_break;	/* Server break counter before op */
799
800	union {
801		struct {
802			int	which;		/* Which ->file[] to fetch for */
803		} fetch_status;
804		struct {
805			int	reason;		/* enum afs_edit_dir_reason */
806			mode_t	mode;
807			const char *symlink;
808		} create;
809		struct {
810			bool	need_rehash;
811		} unlink;
812		struct {
813			struct dentry *rehash;
814			struct dentry *tmp;
815			bool	new_negative;
816		} rename;
817		struct {
818			struct afs_read *req;
819		} fetch;
820		struct {
821			afs_lock_type_t type;
822		} lock;
823		struct {
824			struct iov_iter	*write_iter;
825			loff_t	pos;
826			loff_t	size;
827			loff_t	i_size;
828			bool	laundering;	/* Laundering page, PG_writeback not set */
829		} store;
830		struct {
831			struct iattr	*attr;
832			loff_t		old_i_size;
833		} setattr;
834		struct afs_acl	*acl;
835		struct yfs_acl	*yacl;
836		struct {
837			struct afs_volume_status vs;
838			struct kstatfs		*buf;
839		} volstatus;
840	};
841
842	/* Fileserver iteration state */
843	struct afs_addr_cursor	ac;
844	struct afs_server_list	*server_list;	/* Current server list (pins ref) */
845	struct afs_server	*server;	/* Server we're using (ref pinned by server_list) */
846	struct afs_call		*call;
847	unsigned long		untried;	/* Bitmask of untried servers */
848	short			index;		/* Current server */
849	unsigned short		nr_iterations;	/* Number of server iterations */
850
851	unsigned int		flags;
852#define AFS_OPERATION_STOP		0x0001	/* Set to cease iteration */
853#define AFS_OPERATION_VBUSY		0x0002	/* Set if seen VBUSY */
854#define AFS_OPERATION_VMOVED		0x0004	/* Set if seen VMOVED */
855#define AFS_OPERATION_VNOVOL		0x0008	/* Set if seen VNOVOL */
856#define AFS_OPERATION_CUR_ONLY		0x0010	/* Set if current server only (file lock held) */
857#define AFS_OPERATION_NO_VSLEEP		0x0020	/* Set to prevent sleep on VBUSY, VOFFLINE, ... */
858#define AFS_OPERATION_UNINTR		0x0040	/* Set if op is uninterruptible */
859#define AFS_OPERATION_DOWNGRADE		0x0080	/* Set to retry with downgraded opcode */
860#define AFS_OPERATION_LOCK_0		0x0100	/* Set if have io_lock on file[0] */
861#define AFS_OPERATION_LOCK_1		0x0200	/* Set if have io_lock on file[1] */
862#define AFS_OPERATION_TRIED_ALL		0x0400	/* Set if we've tried all the fileservers */
863#define AFS_OPERATION_RETRY_SERVER	0x0800	/* Set if we should retry the current server */
864#define AFS_OPERATION_DIR_CONFLICT	0x1000	/* Set if we detected a 3rd-party dir change */
865};
866
867/*
868 * Cache auxiliary data.
869 */
870struct afs_vnode_cache_aux {
871	__be64			data_version;
872} __packed;
873
874static inline void afs_set_cache_aux(struct afs_vnode *vnode,
875				     struct afs_vnode_cache_aux *aux)
876{
877	aux->data_version = cpu_to_be64(vnode->status.data_version);
878}
879
880static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags)
881{
882	struct afs_vnode_cache_aux aux;
883
884	afs_set_cache_aux(vnode, &aux);
885	fscache_invalidate(afs_vnode_cache(vnode), &aux,
886			   i_size_read(&vnode->vfs_inode), flags);
887}
888
889/*
890 * We use folio->private to hold the amount of the folio that we've written to,
891 * splitting the field into two parts.  However, we need to represent a range
892 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio
893 * exceeds what we can encode.
894 */
895#ifdef CONFIG_64BIT
896#define __AFS_FOLIO_PRIV_MASK		0x7fffffffUL
897#define __AFS_FOLIO_PRIV_SHIFT		32
898#define __AFS_FOLIO_PRIV_MMAPPED	0x80000000UL
899#else
900#define __AFS_FOLIO_PRIV_MASK		0x7fffUL
901#define __AFS_FOLIO_PRIV_SHIFT		16
902#define __AFS_FOLIO_PRIV_MMAPPED	0x8000UL
903#endif
904
905static inline unsigned int afs_folio_dirty_resolution(struct folio *folio)
906{
907	int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1);
908	return (shift > 0) ? shift : 0;
909}
910
911static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv)
912{
913	unsigned long x = priv & __AFS_FOLIO_PRIV_MASK;
914
915	/* The lower bound is inclusive */
916	return x << afs_folio_dirty_resolution(folio);
917}
918
919static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv)
920{
921	unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK;
922
923	/* The upper bound is immediately beyond the region */
924	return (x + 1) << afs_folio_dirty_resolution(folio);
925}
926
927static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to)
928{
929	unsigned int res = afs_folio_dirty_resolution(folio);
930	from >>= res;
931	to = (to - 1) >> res;
932	return (to << __AFS_FOLIO_PRIV_SHIFT) | from;
933}
934
935static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv)
936{
937	return priv | __AFS_FOLIO_PRIV_MMAPPED;
938}
939
940static inline bool afs_is_folio_dirty_mmapped(unsigned long priv)
941{
942	return priv & __AFS_FOLIO_PRIV_MMAPPED;
943}
944
945#include <trace/events/afs.h>
946
947/*****************************************************************************/
948/*
949 * addr_list.c
950 */
951static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
952{
953	if (alist)
954		refcount_inc(&alist->usage);
955	return alist;
956}
957extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
958						unsigned short,
959						unsigned short);
960extern void afs_put_addrlist(struct afs_addr_list *);
961extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
962						      const char *, size_t, char,
963						      unsigned short, unsigned short);
964extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
965extern bool afs_iterate_addresses(struct afs_addr_cursor *);
966extern int afs_end_cursor(struct afs_addr_cursor *);
967
968extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
969extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
970
971/*
972 * cache.c
973 */
974#ifdef CONFIG_AFS_FSCACHE
975extern struct fscache_netfs afs_cache_netfs;
976#endif
977
978/*
979 * callback.c
980 */
981extern void afs_invalidate_mmap_work(struct work_struct *);
982extern void afs_server_init_callback_work(struct work_struct *work);
983extern void afs_init_callback_state(struct afs_server *);
984extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
985extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
986extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
987
988static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
989{
990	return vnode->cb_break + vnode->cb_v_break;
991}
992
993static inline bool afs_cb_is_broken(unsigned int cb_break,
994				    const struct afs_vnode *vnode)
995{
996	return cb_break != (vnode->cb_break + vnode->volume->cb_v_break);
997}
998
999/*
1000 * cell.c
1001 */
1002extern int afs_cell_init(struct afs_net *, const char *);
1003extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned,
1004				      enum afs_cell_trace);
1005extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
1006					const char *, bool);
1007extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace);
1008extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace);
1009extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace);
1010extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace);
1011extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace);
1012extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace);
1013extern void afs_manage_cells(struct work_struct *);
1014extern void afs_cells_timer(struct timer_list *);
1015extern void __net_exit afs_cell_purge(struct afs_net *);
1016
1017/*
1018 * cmservice.c
1019 */
1020extern bool afs_cm_incoming_call(struct afs_call *);
1021
1022/*
1023 * dir.c
1024 */
1025extern const struct file_operations afs_dir_file_operations;
1026extern const struct inode_operations afs_dir_inode_operations;
1027extern const struct address_space_operations afs_dir_aops;
1028extern const struct dentry_operations afs_fs_dentry_operations;
1029
1030extern void afs_d_release(struct dentry *);
1031extern void afs_check_for_remote_deletion(struct afs_operation *);
1032
1033/*
1034 * dir_edit.c
1035 */
1036extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
1037			     enum afs_edit_dir_reason);
1038extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
1039
1040/*
1041 * dir_silly.c
1042 */
1043extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
1044			   struct dentry *, struct key *);
1045extern int afs_silly_iput(struct dentry *, struct inode *);
1046
1047/*
1048 * dynroot.c
1049 */
1050extern const struct inode_operations afs_dynroot_inode_operations;
1051extern const struct dentry_operations afs_dynroot_dentry_operations;
1052
1053extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
1054extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
1055extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
1056extern int afs_dynroot_populate(struct super_block *);
1057extern void afs_dynroot_depopulate(struct super_block *);
1058
1059/*
1060 * file.c
1061 */
1062extern const struct address_space_operations afs_file_aops;
1063extern const struct address_space_operations afs_symlink_aops;
1064extern const struct inode_operations afs_file_inode_operations;
1065extern const struct file_operations afs_file_operations;
1066extern const struct netfs_read_request_ops afs_req_ops;
1067
1068extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
1069extern void afs_put_wb_key(struct afs_wb_key *);
1070extern int afs_open(struct inode *, struct file *);
1071extern int afs_release(struct inode *, struct file *);
1072extern int afs_fetch_data(struct afs_vnode *, struct afs_read *);
1073extern struct afs_read *afs_alloc_read(gfp_t);
1074extern void afs_put_read(struct afs_read *);
1075extern int afs_write_inode(struct inode *, struct writeback_control *);
1076
1077static inline struct afs_read *afs_get_read(struct afs_read *req)
1078{
1079	refcount_inc(&req->usage);
1080	return req;
1081}
1082
1083/*
1084 * flock.c
1085 */
1086extern struct workqueue_struct *afs_lock_manager;
1087
1088extern void afs_lock_op_done(struct afs_call *);
1089extern void afs_lock_work(struct work_struct *);
1090extern void afs_lock_may_be_available(struct afs_vnode *);
1091extern int afs_lock(struct file *, int, struct file_lock *);
1092extern int afs_flock(struct file *, int, struct file_lock *);
1093
1094/*
1095 * fsclient.c
1096 */
1097extern void afs_fs_fetch_status(struct afs_operation *);
1098extern void afs_fs_fetch_data(struct afs_operation *);
1099extern void afs_fs_create_file(struct afs_operation *);
1100extern void afs_fs_make_dir(struct afs_operation *);
1101extern void afs_fs_remove_file(struct afs_operation *);
1102extern void afs_fs_remove_dir(struct afs_operation *);
1103extern void afs_fs_link(struct afs_operation *);
1104extern void afs_fs_symlink(struct afs_operation *);
1105extern void afs_fs_rename(struct afs_operation *);
1106extern void afs_fs_store_data(struct afs_operation *);
1107extern void afs_fs_setattr(struct afs_operation *);
1108extern void afs_fs_get_volume_status(struct afs_operation *);
1109extern void afs_fs_set_lock(struct afs_operation *);
1110extern void afs_fs_extend_lock(struct afs_operation *);
1111extern void afs_fs_release_lock(struct afs_operation *);
1112extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
1113					struct afs_addr_cursor *, struct key *);
1114extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
1115				    struct afs_addr_cursor *, struct key *);
1116extern void afs_fs_inline_bulk_status(struct afs_operation *);
1117
1118struct afs_acl {
1119	u32	size;
1120	u8	data[];
1121};
1122
1123extern void afs_fs_fetch_acl(struct afs_operation *);
1124extern void afs_fs_store_acl(struct afs_operation *);
1125
1126/*
1127 * fs_operation.c
1128 */
1129extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *);
1130extern int afs_put_operation(struct afs_operation *);
1131extern bool afs_begin_vnode_operation(struct afs_operation *);
1132extern void afs_wait_for_operation(struct afs_operation *);
1133extern int afs_do_sync_operation(struct afs_operation *);
1134
1135static inline void afs_op_nomem(struct afs_operation *op)
1136{
1137	op->error = -ENOMEM;
1138}
1139
1140static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n,
1141				    struct afs_vnode *vnode)
1142{
1143	op->file[n].vnode = vnode;
1144	op->file[n].need_io_lock = true;
1145}
1146
1147static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n,
1148				  const struct afs_fid *fid)
1149{
1150	op->file[n].fid = *fid;
1151}
1152
1153/*
1154 * fs_probe.c
1155 */
1156extern void afs_fileserver_probe_result(struct afs_call *);
1157extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
1158extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1159extern void afs_probe_fileserver(struct afs_net *, struct afs_server *);
1160extern void afs_fs_probe_dispatcher(struct work_struct *);
1161extern int afs_wait_for_one_fs_probe(struct afs_server *, bool);
1162extern void afs_fs_probe_cleanup(struct afs_net *);
1163
1164/*
1165 * inode.c
1166 */
1167extern const struct afs_operation_ops afs_fetch_status_operation;
1168
1169extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *);
1170extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
1171extern int afs_ilookup5_test_by_fid(struct inode *, void *);
1172extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1173extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *);
1174extern struct inode *afs_root_iget(struct super_block *, struct key *);
1175extern bool afs_check_validity(struct afs_vnode *);
1176extern int afs_validate(struct afs_vnode *, struct key *);
1177extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *,
1178		       struct kstat *, u32, unsigned int);
1179extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *);
1180extern void afs_evict_inode(struct inode *);
1181extern int afs_drop_inode(struct inode *);
1182
1183/*
1184 * main.c
1185 */
1186extern struct workqueue_struct *afs_wq;
1187extern int afs_net_id;
1188
1189static inline struct afs_net *afs_net(struct net *net)
1190{
1191	return net_generic(net, afs_net_id);
1192}
1193
1194static inline struct afs_net *afs_sb2net(struct super_block *sb)
1195{
1196	return afs_net(AFS_FS_S(sb)->net_ns);
1197}
1198
1199static inline struct afs_net *afs_d2net(struct dentry *dentry)
1200{
1201	return afs_sb2net(dentry->d_sb);
1202}
1203
1204static inline struct afs_net *afs_i2net(struct inode *inode)
1205{
1206	return afs_sb2net(inode->i_sb);
1207}
1208
1209static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1210{
1211	return afs_i2net(&vnode->vfs_inode);
1212}
1213
1214static inline struct afs_net *afs_sock2net(struct sock *sk)
1215{
1216	return net_generic(sock_net(sk), afs_net_id);
1217}
1218
1219static inline void __afs_stat(atomic_t *s)
1220{
1221	atomic_inc(s);
1222}
1223
1224#define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1225
1226/*
1227 * misc.c
1228 */
1229extern int afs_abort_to_error(u32);
1230extern void afs_prioritise_error(struct afs_error *, int, u32);
1231
1232/*
1233 * mntpt.c
1234 */
1235extern const struct inode_operations afs_mntpt_inode_operations;
1236extern const struct inode_operations afs_autocell_inode_operations;
1237extern const struct file_operations afs_mntpt_file_operations;
1238
1239extern struct vfsmount *afs_d_automount(struct path *);
1240extern void afs_mntpt_kill_timer(void);
1241
1242/*
1243 * proc.c
1244 */
1245#ifdef CONFIG_PROC_FS
1246extern int __net_init afs_proc_init(struct afs_net *);
1247extern void __net_exit afs_proc_cleanup(struct afs_net *);
1248extern int afs_proc_cell_setup(struct afs_cell *);
1249extern void afs_proc_cell_remove(struct afs_cell *);
1250extern void afs_put_sysnames(struct afs_sysnames *);
1251#else
1252static inline int afs_proc_init(struct afs_net *net) { return 0; }
1253static inline void afs_proc_cleanup(struct afs_net *net) {}
1254static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1255static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1256static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1257#endif
1258
1259/*
1260 * rotate.c
1261 */
1262extern bool afs_select_fileserver(struct afs_operation *);
1263extern void afs_dump_edestaddrreq(const struct afs_operation *);
1264
1265/*
1266 * rxrpc.c
1267 */
1268extern struct workqueue_struct *afs_async_calls;
1269
1270extern int __net_init afs_open_socket(struct afs_net *);
1271extern void __net_exit afs_close_socket(struct afs_net *);
1272extern void afs_charge_preallocation(struct work_struct *);
1273extern void afs_put_call(struct afs_call *);
1274extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1275extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1276extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1277					    const struct afs_call_type *,
1278					    size_t, size_t);
1279extern void afs_flat_call_destructor(struct afs_call *);
1280extern void afs_send_empty_reply(struct afs_call *);
1281extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1282extern int afs_extract_data(struct afs_call *, bool);
1283extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause);
1284
1285static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call,
1286				    gfp_t gfp)
1287{
1288	op->call = call;
1289	op->type = call->type;
1290	call->op = op;
1291	call->key = op->key;
1292	call->intr = !(op->flags & AFS_OPERATION_UNINTR);
1293	afs_make_call(&op->ac, call, gfp);
1294}
1295
1296static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1297{
1298	call->iov_len = size;
1299	call->kvec[0].iov_base = buf;
1300	call->kvec[0].iov_len = size;
1301	iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size);
1302}
1303
1304static inline void afs_extract_to_tmp(struct afs_call *call)
1305{
1306	call->iov_len = sizeof(call->tmp);
1307	afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1308}
1309
1310static inline void afs_extract_to_tmp64(struct afs_call *call)
1311{
1312	call->iov_len = sizeof(call->tmp64);
1313	afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1314}
1315
1316static inline void afs_extract_discard(struct afs_call *call, size_t size)
1317{
1318	call->iov_len = size;
1319	iov_iter_discard(&call->def_iter, READ, size);
1320}
1321
1322static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1323{
1324	call->iov_len = size;
1325	afs_extract_begin(call, call->buffer, size);
1326}
1327
1328static inline int afs_transfer_reply(struct afs_call *call)
1329{
1330	return afs_extract_data(call, false);
1331}
1332
1333static inline bool afs_check_call_state(struct afs_call *call,
1334					enum afs_call_state state)
1335{
1336	return READ_ONCE(call->state) == state;
1337}
1338
1339static inline bool afs_set_call_state(struct afs_call *call,
1340				      enum afs_call_state from,
1341				      enum afs_call_state to)
1342{
1343	bool ok = false;
1344
1345	spin_lock_bh(&call->state_lock);
1346	if (call->state == from) {
1347		call->state = to;
1348		trace_afs_call_state(call, from, to, 0, 0);
1349		ok = true;
1350	}
1351	spin_unlock_bh(&call->state_lock);
1352	return ok;
1353}
1354
1355static inline void afs_set_call_complete(struct afs_call *call,
1356					 int error, u32 remote_abort)
1357{
1358	enum afs_call_state state;
1359	bool ok = false;
1360
1361	spin_lock_bh(&call->state_lock);
1362	state = call->state;
1363	if (state != AFS_CALL_COMPLETE) {
1364		call->abort_code = remote_abort;
1365		call->error = error;
1366		call->state = AFS_CALL_COMPLETE;
1367		trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1368				     error, remote_abort);
1369		ok = true;
1370	}
1371	spin_unlock_bh(&call->state_lock);
1372	if (ok) {
1373		trace_afs_call_done(call);
1374
1375		/* Asynchronous calls have two refs to release - one from the alloc and
1376		 * one queued with the work item - and we can't just deallocate the
1377		 * call because the work item may be queued again.
1378		 */
1379		if (call->drop_ref)
1380			afs_put_call(call);
1381	}
1382}
1383
1384/*
1385 * security.c
1386 */
1387extern void afs_put_permits(struct afs_permits *);
1388extern void afs_clear_permits(struct afs_vnode *);
1389extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
1390			     struct afs_status_cb *);
1391extern void afs_zap_permits(struct rcu_head *);
1392extern struct key *afs_request_key(struct afs_cell *);
1393extern struct key *afs_request_key_rcu(struct afs_cell *);
1394extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1395extern int afs_permission(struct user_namespace *, struct inode *, int);
1396extern void __exit afs_clean_up_permit_cache(void);
1397
1398/*
1399 * server.c
1400 */
1401extern spinlock_t afs_server_peer_lock;
1402
1403extern struct afs_server *afs_find_server(struct afs_net *,
1404					  const struct sockaddr_rxrpc *);
1405extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1406extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32);
1407extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
1408extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace);
1409extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1410extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace);
1411extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1412extern void afs_manage_servers(struct work_struct *);
1413extern void afs_servers_timer(struct timer_list *);
1414extern void afs_fs_probe_timer(struct timer_list *);
1415extern void __net_exit afs_purge_servers(struct afs_net *);
1416extern bool afs_check_server_record(struct afs_operation *, struct afs_server *);
1417
1418static inline void afs_inc_servers_outstanding(struct afs_net *net)
1419{
1420	atomic_inc(&net->servers_outstanding);
1421}
1422
1423static inline void afs_dec_servers_outstanding(struct afs_net *net)
1424{
1425	if (atomic_dec_and_test(&net->servers_outstanding))
1426		wake_up_var(&net->servers_outstanding);
1427}
1428
1429static inline bool afs_is_probing_server(struct afs_server *server)
1430{
1431	return list_empty(&server->probe_link);
1432}
1433
1434/*
1435 * server_list.c
1436 */
1437static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1438{
1439	refcount_inc(&slist->usage);
1440	return slist;
1441}
1442
1443extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1444extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1445						     struct afs_vldb_entry *,
1446						     u8);
1447extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1448
1449/*
1450 * super.c
1451 */
1452extern int __init afs_fs_init(void);
1453extern void afs_fs_exit(void);
1454
1455/*
1456 * vlclient.c
1457 */
1458extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1459							 const char *, int);
1460extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1461extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1462						struct key *, struct afs_vlserver *, unsigned int);
1463extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1464extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *);
1465
1466/*
1467 * vl_alias.c
1468 */
1469extern int afs_cell_detect_alias(struct afs_cell *, struct key *);
1470
1471/*
1472 * vl_probe.c
1473 */
1474extern void afs_vlserver_probe_result(struct afs_call *);
1475extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1476extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1477
1478/*
1479 * vl_rotate.c
1480 */
1481extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1482					 struct afs_cell *, struct key *);
1483extern bool afs_select_vlserver(struct afs_vl_cursor *);
1484extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1485extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1486
1487/*
1488 * vlserver_list.c
1489 */
1490static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1491{
1492	atomic_inc(&vlserver->usage);
1493	return vlserver;
1494}
1495
1496static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1497{
1498	if (vllist)
1499		atomic_inc(&vllist->usage);
1500	return vllist;
1501}
1502
1503extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1504extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1505extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1506extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1507extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1508							   const void *, size_t);
1509
1510/*
1511 * volume.c
1512 */
1513extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1514extern int afs_activate_volume(struct afs_volume *);
1515extern void afs_deactivate_volume(struct afs_volume *);
1516extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace);
1517extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace);
1518extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *);
1519
1520/*
1521 * write.c
1522 */
1523#ifdef CONFIG_AFS_FSCACHE
1524extern int afs_set_page_dirty(struct page *);
1525#else
1526#define afs_set_page_dirty __set_page_dirty_nobuffers
1527#endif
1528extern int afs_write_begin(struct file *file, struct address_space *mapping,
1529			loff_t pos, unsigned len, unsigned flags,
1530			struct page **pagep, void **fsdata);
1531extern int afs_write_end(struct file *file, struct address_space *mapping,
1532			loff_t pos, unsigned len, unsigned copied,
1533			struct page *page, void *fsdata);
1534extern int afs_writepage(struct page *, struct writeback_control *);
1535extern int afs_writepages(struct address_space *, struct writeback_control *);
1536extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1537extern int afs_fsync(struct file *, loff_t, loff_t, int);
1538extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1539extern void afs_prune_wb_keys(struct afs_vnode *);
1540extern int afs_launder_page(struct page *);
1541
1542/*
1543 * xattr.c
1544 */
1545extern const struct xattr_handler *afs_xattr_handlers[];
1546
1547/*
1548 * yfsclient.c
1549 */
1550extern void yfs_fs_fetch_data(struct afs_operation *);
1551extern void yfs_fs_create_file(struct afs_operation *);
1552extern void yfs_fs_make_dir(struct afs_operation *);
1553extern void yfs_fs_remove_file2(struct afs_operation *);
1554extern void yfs_fs_remove_file(struct afs_operation *);
1555extern void yfs_fs_remove_dir(struct afs_operation *);
1556extern void yfs_fs_link(struct afs_operation *);
1557extern void yfs_fs_symlink(struct afs_operation *);
1558extern void yfs_fs_rename(struct afs_operation *);
1559extern void yfs_fs_store_data(struct afs_operation *);
1560extern void yfs_fs_setattr(struct afs_operation *);
1561extern void yfs_fs_get_volume_status(struct afs_operation *);
1562extern void yfs_fs_set_lock(struct afs_operation *);
1563extern void yfs_fs_extend_lock(struct afs_operation *);
1564extern void yfs_fs_release_lock(struct afs_operation *);
1565extern void yfs_fs_fetch_status(struct afs_operation *);
1566extern void yfs_fs_inline_bulk_status(struct afs_operation *);
1567
1568struct yfs_acl {
1569	struct afs_acl	*acl;		/* Dir/file/symlink ACL */
1570	struct afs_acl	*vol_acl;	/* Whole volume ACL */
1571	u32		inherit_flag;	/* True if ACL is inherited from parent dir */
1572	u32		num_cleaned;	/* Number of ACEs removed due to subject removal */
1573	unsigned int	flags;
1574#define YFS_ACL_WANT_ACL	0x01	/* Set if caller wants ->acl */
1575#define YFS_ACL_WANT_VOL_ACL	0x02	/* Set if caller wants ->vol_acl */
1576};
1577
1578extern void yfs_free_opaque_acl(struct yfs_acl *);
1579extern void yfs_fs_fetch_opaque_acl(struct afs_operation *);
1580extern void yfs_fs_store_opaque_acl2(struct afs_operation *);
1581
1582/*
1583 * Miscellaneous inline functions.
1584 */
1585static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1586{
1587	return container_of(inode, struct afs_vnode, vfs_inode);
1588}
1589
1590static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1591{
1592	return &vnode->vfs_inode;
1593}
1594
1595/*
1596 * Note that a dentry got changed.  We need to set d_fsdata to the data version
1597 * number derived from the result of the operation.  It doesn't matter if
1598 * d_fsdata goes backwards as we'll just revalidate.
1599 */
1600static inline void afs_update_dentry_version(struct afs_operation *op,
1601					     struct afs_vnode_param *dir_vp,
1602					     struct dentry *dentry)
1603{
1604	if (!op->error)
1605		dentry->d_fsdata =
1606			(void *)(unsigned long)dir_vp->scb.status.data_version;
1607}
1608
1609/*
1610 * Set the file size and block count.  Estimate the number of 512 bytes blocks
1611 * used, rounded up to nearest 1K for consistency with other AFS clients.
1612 */
1613static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size)
1614{
1615	i_size_write(&vnode->vfs_inode, size);
1616	vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1;
1617}
1618
1619/*
1620 * Check for a conflicting operation on a directory that we just unlinked from.
1621 * If someone managed to sneak a link or an unlink in on the file we just
1622 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS).
1623 */
1624static inline void afs_check_dir_conflict(struct afs_operation *op,
1625					  struct afs_vnode_param *dvp)
1626{
1627	if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version)
1628		op->flags |= AFS_OPERATION_DIR_CONFLICT;
1629}
1630
1631static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1632{
1633	trace_afs_io_error(call->debug_id, -EIO, where);
1634	return -EIO;
1635}
1636
1637static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1638{
1639	trace_afs_file_error(vnode, -EIO, where);
1640	return -EIO;
1641}
1642
1643/*****************************************************************************/
1644/*
1645 * debug tracing
1646 */
1647extern unsigned afs_debug;
1648
1649#define dbgprintk(FMT,...) \
1650	printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1651
1652#define kenter(FMT,...)	dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1653#define kleave(FMT,...)	dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1654#define kdebug(FMT,...)	dbgprintk("    "FMT ,##__VA_ARGS__)
1655
1656
1657#if defined(__KDEBUG)
1658#define _enter(FMT,...)	kenter(FMT,##__VA_ARGS__)
1659#define _leave(FMT,...)	kleave(FMT,##__VA_ARGS__)
1660#define _debug(FMT,...)	kdebug(FMT,##__VA_ARGS__)
1661
1662#elif defined(CONFIG_AFS_DEBUG)
1663#define AFS_DEBUG_KENTER	0x01
1664#define AFS_DEBUG_KLEAVE	0x02
1665#define AFS_DEBUG_KDEBUG	0x04
1666
1667#define _enter(FMT,...)					\
1668do {							\
1669	if (unlikely(afs_debug & AFS_DEBUG_KENTER))	\
1670		kenter(FMT,##__VA_ARGS__);		\
1671} while (0)
1672
1673#define _leave(FMT,...)					\
1674do {							\
1675	if (unlikely(afs_debug & AFS_DEBUG_KLEAVE))	\
1676		kleave(FMT,##__VA_ARGS__);		\
1677} while (0)
1678
1679#define _debug(FMT,...)					\
1680do {							\
1681	if (unlikely(afs_debug & AFS_DEBUG_KDEBUG))	\
1682		kdebug(FMT,##__VA_ARGS__);		\
1683} while (0)
1684
1685#else
1686#define _enter(FMT,...)	no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1687#define _leave(FMT,...)	no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1688#define _debug(FMT,...)	no_printk("    "FMT ,##__VA_ARGS__)
1689#endif
1690
1691/*
1692 * debug assertion checking
1693 */
1694#if 1 // defined(__KDEBUGALL)
1695
1696#define ASSERT(X)						\
1697do {								\
1698	if (unlikely(!(X))) {					\
1699		printk(KERN_ERR "\n");				\
1700		printk(KERN_ERR "AFS: Assertion failed\n");	\
1701		BUG();						\
1702	}							\
1703} while(0)
1704
1705#define ASSERTCMP(X, OP, Y)						\
1706do {									\
1707	if (unlikely(!((X) OP (Y)))) {					\
1708		printk(KERN_ERR "\n");					\
1709		printk(KERN_ERR "AFS: Assertion failed\n");		\
1710		printk(KERN_ERR "%lu " #OP " %lu is false\n",		\
1711		       (unsigned long)(X), (unsigned long)(Y));		\
1712		printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n",	\
1713		       (unsigned long)(X), (unsigned long)(Y));		\
1714		BUG();							\
1715	}								\
1716} while(0)
1717
1718#define ASSERTRANGE(L, OP1, N, OP2, H)					\
1719do {									\
1720	if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) {		\
1721		printk(KERN_ERR "\n");					\
1722		printk(KERN_ERR "AFS: Assertion failed\n");		\
1723		printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n",	\
1724		       (unsigned long)(L), (unsigned long)(N),		\
1725		       (unsigned long)(H));				\
1726		printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1727		       (unsigned long)(L), (unsigned long)(N),		\
1728		       (unsigned long)(H));				\
1729		BUG();							\
1730	}								\
1731} while(0)
1732
1733#define ASSERTIF(C, X)						\
1734do {								\
1735	if (unlikely((C) && !(X))) {				\
1736		printk(KERN_ERR "\n");				\
1737		printk(KERN_ERR "AFS: Assertion failed\n");	\
1738		BUG();						\
1739	}							\
1740} while(0)
1741
1742#define ASSERTIFCMP(C, X, OP, Y)					\
1743do {									\
1744	if (unlikely((C) && !((X) OP (Y)))) {				\
1745		printk(KERN_ERR "\n");					\
1746		printk(KERN_ERR "AFS: Assertion failed\n");		\
1747		printk(KERN_ERR "%lu " #OP " %lu is false\n",		\
1748		       (unsigned long)(X), (unsigned long)(Y));		\
1749		printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n",	\
1750		       (unsigned long)(X), (unsigned long)(Y));		\
1751		BUG();							\
1752	}								\
1753} while(0)
1754
1755#else
1756
1757#define ASSERT(X)				\
1758do {						\
1759} while(0)
1760
1761#define ASSERTCMP(X, OP, Y)			\
1762do {						\
1763} while(0)
1764
1765#define ASSERTRANGE(L, OP1, N, OP2, H)		\
1766do {						\
1767} while(0)
1768
1769#define ASSERTIF(C, X)				\
1770do {						\
1771} while(0)
1772
1773#define ASSERTIFCMP(C, X, OP, Y)		\
1774do {						\
1775} while(0)
1776
1777#endif /* __KDEBUGALL */
1778