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