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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / fs / afs / internal.h
blob72de1f157d20235b4c2a103d5f098b5b9cf7dd1f
1 /* internal AFS stuff
2 *
3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12 #include <linux/compiler.h>
13 #include <linux/kernel.h>
14 #include <linux/ktime.h>
15 #include <linux/fs.h>
16 #include <linux/pagemap.h>
17 #include <linux/rxrpc.h>
18 #include <linux/key.h>
19 #include <linux/workqueue.h>
20 #include <linux/sched.h>
21 #include <linux/fscache.h>
22 #include <linux/backing-dev.h>
23 #include <linux/uuid.h>
24 #include <linux/mm_types.h>
25 #include <net/net_namespace.h>
26 #include <net/netns/generic.h>
27 #include <net/sock.h>
28 #include <net/af_rxrpc.h>
29
30 #include "afs.h"
31 #include "afs_vl.h"
32
33 #define AFS_CELL_MAX_ADDRS 15
34
35 struct pagevec;
36 struct afs_call;
37
38 struct afs_mount_params {
39 bool rwpath; /* T if the parent should be considered R/W */
40 bool force; /* T to force cell type */
41 bool autocell; /* T if set auto mount operation */
42 bool dyn_root; /* T if dynamic root */
43 afs_voltype_t type; /* type of volume requested */
44 int volnamesz; /* size of volume name */
45 const char *volname; /* name of volume to mount */
46 struct net *net_ns; /* Network namespace in effect */
47 struct afs_net *net; /* the AFS net namespace stuff */
48 struct afs_cell *cell; /* cell in which to find volume */
49 struct afs_volume *volume; /* volume record */
50 struct key *key; /* key to use for secure mounting */
51 };
52
53 struct afs_iget_data {
54 struct afs_fid fid;
55 struct afs_volume *volume; /* volume on which resides */
56 };
57
58 enum afs_call_state {
59 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
60 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
61 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
62 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
63 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
64 AFS_CALL_SV_REPLYING, /* Server: Replying */
65 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
66 AFS_CALL_COMPLETE, /* Completed or failed */
67 };
68
69 /*
70 * List of server addresses.
71 */
72 struct afs_addr_list {
73 struct rcu_head rcu; /* Must be first */
74 refcount_t usage;
75 u32 version; /* Version */
76 unsigned char max_addrs;
77 unsigned char nr_addrs;
78 unsigned char index; /* Address currently in use */
79 unsigned char nr_ipv4; /* Number of IPv4 addresses */
80 unsigned long probed; /* Mask of servers that have been probed */
81 unsigned long yfs; /* Mask of servers that are YFS */
82 struct sockaddr_rxrpc addrs[];
83 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
84 };
85
86 /*
87 * a record of an in-progress RxRPC call
88 */
89 struct afs_call {
90 const struct afs_call_type *type; /* type of call */
91 wait_queue_head_t waitq; /* processes awaiting completion */
92 struct work_struct async_work; /* async I/O processor */
93 struct work_struct work; /* actual work processor */
94 struct rxrpc_call *rxcall; /* RxRPC call handle */
95 struct key *key; /* security for this call */
96 struct afs_net *net; /* The network namespace */
97 struct afs_server *cm_server; /* Server affected by incoming CM call */
98 struct afs_cb_interest *cbi; /* Callback interest for server used */
99 void *request; /* request data (first part) */
100 struct address_space *mapping; /* Pages being written from */
101 void *buffer; /* reply receive buffer */
102 void *reply[4]; /* Where to put the reply */
103 pgoff_t first; /* first page in mapping to deal with */
104 pgoff_t last; /* last page in mapping to deal with */
105 size_t offset; /* offset into received data store */
106 atomic_t usage;
107 enum afs_call_state state;
108 spinlock_t state_lock;
109 int error; /* error code */
110 u32 abort_code; /* Remote abort ID or 0 */
111 unsigned request_size; /* size of request data */
112 unsigned reply_max; /* maximum size of reply */
113 unsigned first_offset; /* offset into mapping[first] */
114 unsigned int cb_break; /* cb_break + cb_s_break before the call */
115 union {
116 unsigned last_to; /* amount of mapping[last] */
117 unsigned count2; /* count used in unmarshalling */
118 };
119 unsigned char unmarshall; /* unmarshalling phase */
120 bool incoming; /* T if incoming call */
121 bool send_pages; /* T if data from mapping should be sent */
122 bool need_attention; /* T if RxRPC poked us */
123 bool async; /* T if asynchronous */
124 bool ret_reply0; /* T if should return reply[0] on success */
125 bool upgrade; /* T to request service upgrade */
126 u16 service_id; /* Actual service ID (after upgrade) */
127 unsigned int debug_id; /* Trace ID */
128 u32 operation_ID; /* operation ID for an incoming call */
129 u32 count; /* count for use in unmarshalling */
130 __be32 tmp; /* place to extract temporary data */
131 afs_dataversion_t expected_version; /* Updated version expected from store */
132 afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */
133 };
134
135 struct afs_call_type {
136 const char *name;
137 unsigned int op; /* Really enum afs_fs_operation */
138
139 /* deliver request or reply data to an call
140 * - returning an error will cause the call to be aborted
141 */
142 int (*deliver)(struct afs_call *call);
143
144 /* clean up a call */
145 void (*destructor)(struct afs_call *call);
146
147 /* Work function */
148 void (*work)(struct work_struct *work);
149 };
150
151 /*
152 * Key available for writeback on a file.
153 */
154 struct afs_wb_key {
155 refcount_t usage;
156 struct key *key;
157 struct list_head vnode_link; /* Link in vnode->wb_keys */
158 };
159
160 /*
161 * AFS open file information record. Pointed to by file->private_data.
162 */
163 struct afs_file {
164 struct key *key; /* The key this file was opened with */
165 struct afs_wb_key *wb; /* Writeback key record for this file */
166 };
167
168 static inline struct key *afs_file_key(struct file *file)
169 {
170 struct afs_file *af = file->private_data;
171
172 return af->key;
173 }
174
175 /*
176 * Record of an outstanding read operation on a vnode.
177 */
178 struct afs_read {
179 loff_t pos; /* Where to start reading */
180 loff_t len; /* How much we're asking for */
181 loff_t actual_len; /* How much we're actually getting */
182 loff_t remain; /* Amount remaining */
183 loff_t file_size; /* File size returned by server */
184 afs_dataversion_t data_version; /* Version number returned by server */
185 refcount_t usage;
186 unsigned int index; /* Which page we're reading into */
187 unsigned int nr_pages;
188 void (*page_done)(struct afs_call *, struct afs_read *);
189 struct page **pages;
190 struct page *array[];
191 };
192
193 /*
194 * AFS superblock private data
195 * - there's one superblock per volume
196 */
197 struct afs_super_info {
198 struct net *net_ns; /* Network namespace */
199 struct afs_cell *cell; /* The cell in which the volume resides */
200 struct afs_volume *volume; /* volume record */
201 bool dyn_root; /* True if dynamic root */
202 };
203
204 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
205 {
206 return sb->s_fs_info;
207 }
208
209 extern struct file_system_type afs_fs_type;
210
211 /*
212 * Set of substitutes for @sys.
213 */
214 struct afs_sysnames {
215 #define AFS_NR_SYSNAME 16
216 char *subs[AFS_NR_SYSNAME];
217 refcount_t usage;
218 unsigned short nr;
219 char blank[1];
220 };
221
222 /*
223 * AFS network namespace record.
224 */
225 struct afs_net {
226 struct net *net; /* Backpointer to the owning net namespace */
227 struct afs_uuid uuid;
228 bool live; /* F if this namespace is being removed */
229
230 /* AF_RXRPC I/O stuff */
231 struct socket *socket;
232 struct afs_call *spare_incoming_call;
233 struct work_struct charge_preallocation_work;
234 struct mutex socket_mutex;
235 atomic_t nr_outstanding_calls;
236 atomic_t nr_superblocks;
237
238 /* Cell database */
239 struct rb_root cells;
240 struct afs_cell __rcu *ws_cell;
241 struct work_struct cells_manager;
242 struct timer_list cells_timer;
243 atomic_t cells_outstanding;
244 seqlock_t cells_lock;
245
246 struct mutex proc_cells_lock;
247 struct hlist_head proc_cells;
248
249 /* Known servers. Theoretically each fileserver can only be in one
250 * cell, but in practice, people create aliases and subsets and there's
251 * no easy way to distinguish them.
252 */
253 seqlock_t fs_lock; /* For fs_servers */
254 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
255 struct list_head fs_updates; /* afs_server (by update_at) */
256 struct hlist_head fs_proc; /* procfs servers list */
257
258 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
259 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
260 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
261
262 struct work_struct fs_manager;
263 struct timer_list fs_timer;
264 atomic_t servers_outstanding;
265
266 /* File locking renewal management */
267 struct mutex lock_manager_mutex;
268
269 /* Misc */
270 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
271 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
272 struct afs_sysnames *sysnames;
273 rwlock_t sysnames_lock;
274
275 /* Statistics counters */
276 atomic_t n_lookup; /* Number of lookups done */
277 atomic_t n_reval; /* Number of dentries needing revalidation */
278 atomic_t n_inval; /* Number of invalidations by the server */
279 atomic_t n_relpg; /* Number of invalidations by releasepage */
280 atomic_t n_read_dir; /* Number of directory pages read */
281 atomic_t n_dir_cr; /* Number of directory entry creation edits */
282 atomic_t n_dir_rm; /* Number of directory entry removal edits */
283 atomic_t n_stores; /* Number of store ops */
284 atomic_long_t n_store_bytes; /* Number of bytes stored */
285 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
286 atomic_t n_fetches; /* Number of data fetch ops */
287 };
288
289 extern const char afs_init_sysname[];
290
291 enum afs_cell_state {
292 AFS_CELL_UNSET,
293 AFS_CELL_ACTIVATING,
294 AFS_CELL_ACTIVE,
295 AFS_CELL_DEACTIVATING,
296 AFS_CELL_INACTIVE,
297 AFS_CELL_FAILED,
298 };
299
300 /*
301 * AFS cell record.
302 *
303 * This is a tricky concept to get right as it is possible to create aliases
304 * simply by pointing AFSDB/SRV records for two names at the same set of VL
305 * servers; it is also possible to do things like setting up two sets of VL
306 * servers, one of which provides a superset of the volumes provided by the
307 * other (for internal/external division, for example).
308 *
309 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
310 * servers and (b) a cell's name is used by the client to select the key to use
311 * for authentication and encryption. The cell name is not typically used in
312 * the protocol.
313 *
314 * There is no easy way to determine if two cells are aliases or one is a
315 * subset of another.
316 */
317 struct afs_cell {
318 union {
319 struct rcu_head rcu;
320 struct rb_node net_node; /* Node in net->cells */
321 };
322 struct afs_net *net;
323 struct key *anonymous_key; /* anonymous user key for this cell */
324 struct work_struct manager; /* Manager for init/deinit/dns */
325 struct hlist_node proc_link; /* /proc cell list link */
326 #ifdef CONFIG_AFS_FSCACHE
327 struct fscache_cookie *cache; /* caching cookie */
328 #endif
329 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
330 time64_t last_inactive; /* Time of last drop of usage count */
331 atomic_t usage;
332 unsigned long flags;
333 #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */
334 #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */
335 #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */
336 #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */
337 #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */
338 enum afs_cell_state state;
339 short error;
340
341 /* Active fileserver interaction state. */
342 struct list_head proc_volumes; /* procfs volume list */
343 rwlock_t proc_lock;
344
345 /* VL server list. */
346 rwlock_t vl_addrs_lock; /* Lock on vl_addrs */
347 struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */
348 u8 name_len; /* Length of name */
349 char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */
350 };
351
352 /*
353 * Cached VLDB entry.
354 *
355 * This is pointed to by cell->vldb_entries, indexed by name.
356 */
357 struct afs_vldb_entry {
358 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
359
360 unsigned long flags;
361 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
362 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
363 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
364 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
365 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
366
367 uuid_t fs_server[AFS_NMAXNSERVERS];
368 u8 fs_mask[AFS_NMAXNSERVERS];
369 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
370 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
371 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
372 short error;
373 u8 nr_servers; /* Number of server records */
374 u8 name_len;
375 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
376 };
377
378 /*
379 * Record of fileserver with which we're actively communicating.
380 */
381 struct afs_server {
382 struct rcu_head rcu;
383 union {
384 uuid_t uuid; /* Server ID */
385 struct afs_uuid _uuid;
386 };
387
388 struct afs_addr_list __rcu *addresses;
389 struct rb_node uuid_rb; /* Link in net->servers */
390 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
391 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
392 struct hlist_node proc_link; /* Link in net->fs_proc */
393 struct afs_server *gc_next; /* Next server in manager's list */
394 time64_t put_time; /* Time at which last put */
395 time64_t update_at; /* Time at which to next update the record */
396 unsigned long flags;
397 #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */
398 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */
399 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */
400 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */
401 #define AFS_SERVER_FL_UPDATING 4
402 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */
403 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */
404 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */
405 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
406 atomic_t usage;
407 u32 addr_version; /* Address list version */
408
409 /* file service access */
410 rwlock_t fs_lock; /* access lock */
411
412 /* callback promise management */
413 struct hlist_head cb_volumes; /* List of volume interests on this server */
414 unsigned cb_s_break; /* Break-everything counter. */
415 rwlock_t cb_break_lock; /* Volume finding lock */
416 };
417
418 /*
419 * Volume collation in the server's callback interest list.
420 */
421 struct afs_vol_interest {
422 struct hlist_node srv_link; /* Link in server->cb_volumes */
423 struct hlist_head cb_interests; /* List of callback interests on the server */
424 afs_volid_t vid; /* Volume ID to match */
425 unsigned int usage;
426 };
427
428 /*
429 * Interest by a superblock on a server.
430 */
431 struct afs_cb_interest {
432 struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */
433 struct afs_vol_interest *vol_interest;
434 struct afs_server *server; /* Server on which this interest resides */
435 struct super_block *sb; /* Superblock on which inodes reside */
436 afs_volid_t vid; /* Volume ID to match */
437 refcount_t usage;
438 };
439
440 /*
441 * Replaceable server list.
442 */
443 struct afs_server_entry {
444 struct afs_server *server;
445 struct afs_cb_interest *cb_interest;
446 };
447
448 struct afs_server_list {
449 refcount_t usage;
450 unsigned short nr_servers;
451 unsigned short index; /* Server currently in use */
452 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
453 unsigned int seq; /* Set to ->servers_seq when installed */
454 rwlock_t lock;
455 struct afs_server_entry servers[];
456 };
457
458 /*
459 * Live AFS volume management.
460 */
461 struct afs_volume {
462 afs_volid_t vid; /* volume ID */
463 atomic_t usage;
464 time64_t update_at; /* Time at which to next update */
465 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
466 struct list_head proc_link; /* Link in cell->vl_proc */
467 unsigned long flags;
468 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
469 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
470 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
471 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
472 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
473 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
474 #ifdef CONFIG_AFS_FSCACHE
475 struct fscache_cookie *cache; /* caching cookie */
476 #endif
477 struct afs_server_list *servers; /* List of servers on which volume resides */
478 rwlock_t servers_lock; /* Lock for ->servers */
479 unsigned int servers_seq; /* Incremented each time ->servers changes */
480
481 unsigned cb_v_break; /* Break-everything counter. */
482 rwlock_t cb_break_lock;
483
484 afs_voltype_t type; /* type of volume */
485 short error;
486 char type_force; /* force volume type (suppress R/O -> R/W) */
487 u8 name_len;
488 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
489 };
490
491 enum afs_lock_state {
492 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
493 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
494 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
495 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
496 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
497 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
498 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
499 };
500
501 /*
502 * AFS inode private data.
503 *
504 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
505 * leak from one inode to another.
506 */
507 struct afs_vnode {
508 struct inode vfs_inode; /* the VFS's inode record */
509
510 struct afs_volume *volume; /* volume on which vnode resides */
511 struct afs_fid fid; /* the file identifier for this inode */
512 struct afs_file_status status; /* AFS status info for this file */
513 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
514 #ifdef CONFIG_AFS_FSCACHE
515 struct fscache_cookie *cache; /* caching cookie */
516 #endif
517 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
518 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
519 struct rw_semaphore validate_lock; /* lock for validating this vnode */
520 spinlock_t wb_lock; /* lock for wb_keys */
521 spinlock_t lock; /* waitqueue/flags lock */
522 unsigned long flags;
523 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
524 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
525 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
526 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
527 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
528 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
529 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
530 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
531 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
532
533 struct list_head wb_keys; /* List of keys available for writeback */
534 struct list_head pending_locks; /* locks waiting to be granted */
535 struct list_head granted_locks; /* locks granted on this file */
536 struct delayed_work lock_work; /* work to be done in locking */
537 struct key *lock_key; /* Key to be used in lock ops */
538 enum afs_lock_state lock_state : 8;
539 afs_lock_type_t lock_type : 8;
540
541 /* outstanding callback notification on this file */
542 struct afs_cb_interest *cb_interest; /* Server on which this resides */
543 unsigned int cb_s_break; /* Mass break counter on ->server */
544 unsigned int cb_v_break; /* Mass break counter on ->volume */
545 unsigned int cb_break; /* Break counter on vnode */
546 seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */
547
548 time64_t cb_expires_at; /* time at which callback expires */
549 unsigned cb_version; /* callback version */
550 afs_callback_type_t cb_type; /* type of callback */
551 };
552
553 /*
554 * cached security record for one user's attempt to access a vnode
555 */
556 struct afs_permit {
557 struct key *key; /* RxRPC ticket holding a security context */
558 afs_access_t access; /* CallerAccess value for this key */
559 };
560
561 /*
562 * Immutable cache of CallerAccess records from attempts to access vnodes.
563 * These may be shared between multiple vnodes.
564 */
565 struct afs_permits {
566 struct rcu_head rcu;
567 struct hlist_node hash_node; /* Link in hash */
568 unsigned long h; /* Hash value for this permit list */
569 refcount_t usage;
570 unsigned short nr_permits; /* Number of records */
571 bool invalidated; /* Invalidated due to key change */
572 struct afs_permit permits[]; /* List of permits sorted by key pointer */
573 };
574
575 /*
576 * record of one of a system's set of network interfaces
577 */
578 struct afs_interface {
579 struct in_addr address; /* IPv4 address bound to interface */
580 struct in_addr netmask; /* netmask applied to address */
581 unsigned mtu; /* MTU of interface */
582 };
583
584 /*
585 * Cursor for iterating over a server's address list.
586 */
587 struct afs_addr_cursor {
588 struct afs_addr_list *alist; /* Current address list (pins ref) */
589 struct sockaddr_rxrpc *addr;
590 u32 abort_code;
591 unsigned short start; /* Starting point in alist->addrs[] */
592 unsigned short index; /* Wrapping offset from start to current addr */
593 short error;
594 bool begun; /* T if we've begun iteration */
595 bool responded; /* T if the current address responded */
596 };
597
598 /*
599 * Cursor for iterating over a set of fileservers.
600 */
601 struct afs_fs_cursor {
602 struct afs_addr_cursor ac;
603 struct afs_vnode *vnode;
604 struct afs_server_list *server_list; /* Current server list (pins ref) */
605 struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */
606 struct key *key; /* Key for the server */
607 unsigned int cb_break; /* cb_break + cb_s_break before the call */
608 unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */
609 unsigned char start; /* Initial index in server list */
610 unsigned char index; /* Number of servers tried beyond start */
611 unsigned short flags;
612 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */
613 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */
614 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */
615 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */
616 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
617 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
618 };
619
620 /*
621 * Cache auxiliary data.
622 */
623 struct afs_vnode_cache_aux {
624 u64 data_version;
625 } __packed;
626
627 #include <trace/events/afs.h>
628
629 /*****************************************************************************/
630 /*
631 * addr_list.c
632 */
633 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
634 {
635 if (alist)
636 refcount_inc(&alist->usage);
637 return alist;
638 }
639 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
640 unsigned short,
641 unsigned short);
642 extern void afs_put_addrlist(struct afs_addr_list *);
643 extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char,
644 unsigned short, unsigned short);
645 extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *);
646 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
647 extern int afs_end_cursor(struct afs_addr_cursor *);
648 extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *);
649
650 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
651 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
652
653 /*
654 * cache.c
655 */
656 #ifdef CONFIG_AFS_FSCACHE
657 extern struct fscache_netfs afs_cache_netfs;
658 extern struct fscache_cookie_def afs_cell_cache_index_def;
659 extern struct fscache_cookie_def afs_volume_cache_index_def;
660 extern struct fscache_cookie_def afs_vnode_cache_index_def;
661 #else
662 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
663 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
664 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
665 #endif
666
667 /*
668 * callback.c
669 */
670 extern void afs_init_callback_state(struct afs_server *);
671 extern void afs_break_callback(struct afs_vnode *);
672 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*);
673
674 extern int afs_register_server_cb_interest(struct afs_vnode *,
675 struct afs_server_list *, unsigned int);
676 extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *);
677 extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *);
678
679 static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi)
680 {
681 if (cbi)
682 refcount_inc(&cbi->usage);
683 return cbi;
684 }
685
686 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
687 {
688 return vnode->cb_break + vnode->cb_s_break + vnode->cb_v_break;
689 }
690
691 static inline unsigned int afs_cb_break_sum(struct afs_vnode *vnode,
692 struct afs_cb_interest *cbi)
693 {
694 return vnode->cb_break + cbi->server->cb_s_break + vnode->volume->cb_v_break;
695 }
696
697 /*
698 * cell.c
699 */
700 extern int afs_cell_init(struct afs_net *, const char *);
701 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned);
702 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
703 const char *, bool);
704 extern struct afs_cell *afs_get_cell(struct afs_cell *);
705 extern void afs_put_cell(struct afs_net *, struct afs_cell *);
706 extern void afs_manage_cells(struct work_struct *);
707 extern void afs_cells_timer(struct timer_list *);
708 extern void __net_exit afs_cell_purge(struct afs_net *);
709
710 /*
711 * cmservice.c
712 */
713 extern bool afs_cm_incoming_call(struct afs_call *);
714
715 /*
716 * dir.c
717 */
718 extern const struct file_operations afs_dir_file_operations;
719 extern const struct inode_operations afs_dir_inode_operations;
720 extern const struct address_space_operations afs_dir_aops;
721 extern const struct dentry_operations afs_fs_dentry_operations;
722
723 extern void afs_d_release(struct dentry *);
724
725 /*
726 * dir_edit.c
727 */
728 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
729 enum afs_edit_dir_reason);
730 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
731
732 /*
733 * dynroot.c
734 */
735 extern const struct file_operations afs_dynroot_file_operations;
736 extern const struct inode_operations afs_dynroot_inode_operations;
737 extern const struct dentry_operations afs_dynroot_dentry_operations;
738
739 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
740 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
741 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
742 extern int afs_dynroot_populate(struct super_block *);
743 extern void afs_dynroot_depopulate(struct super_block *);
744
745 /*
746 * file.c
747 */
748 extern const struct address_space_operations afs_fs_aops;
749 extern const struct inode_operations afs_file_inode_operations;
750 extern const struct file_operations afs_file_operations;
751
752 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
753 extern void afs_put_wb_key(struct afs_wb_key *);
754 extern int afs_open(struct inode *, struct file *);
755 extern int afs_release(struct inode *, struct file *);
756 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
757 extern int afs_page_filler(void *, struct page *);
758 extern void afs_put_read(struct afs_read *);
759
760 /*
761 * flock.c
762 */
763 extern struct workqueue_struct *afs_lock_manager;
764
765 extern void afs_lock_work(struct work_struct *);
766 extern void afs_lock_may_be_available(struct afs_vnode *);
767 extern int afs_lock(struct file *, int, struct file_lock *);
768 extern int afs_flock(struct file *, int, struct file_lock *);
769
770 /*
771 * fsclient.c
772 */
773 #define AFS_VNODE_NOT_YET_SET 0x01
774 #define AFS_VNODE_META_CHANGED 0x02
775 #define AFS_VNODE_DATA_CHANGED 0x04
776 extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *,
777 const afs_dataversion_t *, u8);
778
779 extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
780 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
781 extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
782 extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64,
783 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
784 extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool, u64);
785 extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
786 extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
787 struct afs_fid *, struct afs_file_status *);
788 extern int afs_fs_rename(struct afs_fs_cursor *, const char *,
789 struct afs_vnode *, const char *, u64, u64);
790 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
791 pgoff_t, pgoff_t, unsigned, unsigned);
792 extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
793 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
794 extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
795 extern int afs_fs_extend_lock(struct afs_fs_cursor *);
796 extern int afs_fs_release_lock(struct afs_fs_cursor *);
797 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
798 struct afs_addr_cursor *, struct key *);
799 extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
800 struct afs_addr_cursor *, struct key *);
801 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
802 struct afs_fid *, struct afs_file_status *,
803 struct afs_callback *, unsigned int,
804 struct afs_volsync *);
805 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
806 struct afs_fid *, struct afs_file_status *,
807 struct afs_callback *, struct afs_volsync *);
808
809 /*
810 * inode.c
811 */
812 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool);
813 extern int afs_iget5_test(struct inode *, void *);
814 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
815 extern struct inode *afs_iget(struct super_block *, struct key *,
816 struct afs_fid *, struct afs_file_status *,
817 struct afs_callback *,
818 struct afs_cb_interest *);
819 extern void afs_zap_data(struct afs_vnode *);
820 extern int afs_validate(struct afs_vnode *, struct key *);
821 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
822 extern int afs_setattr(struct dentry *, struct iattr *);
823 extern void afs_evict_inode(struct inode *);
824 extern int afs_drop_inode(struct inode *);
825
826 /*
827 * main.c
828 */
829 extern struct workqueue_struct *afs_wq;
830 extern int afs_net_id;
831
832 static inline struct afs_net *afs_net(struct net *net)
833 {
834 return net_generic(net, afs_net_id);
835 }
836
837 static inline struct afs_net *afs_sb2net(struct super_block *sb)
838 {
839 return afs_net(AFS_FS_S(sb)->net_ns);
840 }
841
842 static inline struct afs_net *afs_d2net(struct dentry *dentry)
843 {
844 return afs_sb2net(dentry->d_sb);
845 }
846
847 static inline struct afs_net *afs_i2net(struct inode *inode)
848 {
849 return afs_sb2net(inode->i_sb);
850 }
851
852 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
853 {
854 return afs_i2net(&vnode->vfs_inode);
855 }
856
857 static inline struct afs_net *afs_sock2net(struct sock *sk)
858 {
859 return net_generic(sock_net(sk), afs_net_id);
860 }
861
862 static inline void __afs_stat(atomic_t *s)
863 {
864 atomic_inc(s);
865 }
866
867 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
868
869 /*
870 * misc.c
871 */
872 extern int afs_abort_to_error(u32);
873
874 /*
875 * mntpt.c
876 */
877 extern const struct inode_operations afs_mntpt_inode_operations;
878 extern const struct inode_operations afs_autocell_inode_operations;
879 extern const struct file_operations afs_mntpt_file_operations;
880
881 extern struct vfsmount *afs_d_automount(struct path *);
882 extern void afs_mntpt_kill_timer(void);
883
884 /*
885 * netdevices.c
886 */
887 extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
888 size_t, bool);
889
890 /*
891 * proc.c
892 */
893 #ifdef CONFIG_PROC_FS
894 extern int __net_init afs_proc_init(struct afs_net *);
895 extern void __net_exit afs_proc_cleanup(struct afs_net *);
896 extern int afs_proc_cell_setup(struct afs_cell *);
897 extern void afs_proc_cell_remove(struct afs_cell *);
898 extern void afs_put_sysnames(struct afs_sysnames *);
899 #else
900 static inline int afs_proc_init(struct afs_net *net) { return 0; }
901 static inline void afs_proc_cleanup(struct afs_net *net) {}
902 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
903 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
904 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
905 #endif
906
907 /*
908 * rotate.c
909 */
910 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *,
911 struct key *);
912 extern bool afs_select_fileserver(struct afs_fs_cursor *);
913 extern bool afs_select_current_fileserver(struct afs_fs_cursor *);
914 extern int afs_end_vnode_operation(struct afs_fs_cursor *);
915
916 /*
917 * rxrpc.c
918 */
919 extern struct workqueue_struct *afs_async_calls;
920
921 extern int __net_init afs_open_socket(struct afs_net *);
922 extern void __net_exit afs_close_socket(struct afs_net *);
923 extern void afs_charge_preallocation(struct work_struct *);
924 extern void afs_put_call(struct afs_call *);
925 extern int afs_queue_call_work(struct afs_call *);
926 extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool);
927 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
928 const struct afs_call_type *,
929 size_t, size_t);
930 extern void afs_flat_call_destructor(struct afs_call *);
931 extern void afs_send_empty_reply(struct afs_call *);
932 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
933 extern int afs_extract_data(struct afs_call *, void *, size_t, bool);
934 extern int afs_protocol_error(struct afs_call *, int);
935
936 static inline int afs_transfer_reply(struct afs_call *call)
937 {
938 return afs_extract_data(call, call->buffer, call->reply_max, false);
939 }
940
941 static inline bool afs_check_call_state(struct afs_call *call,
942 enum afs_call_state state)
943 {
944 return READ_ONCE(call->state) == state;
945 }
946
947 static inline bool afs_set_call_state(struct afs_call *call,
948 enum afs_call_state from,
949 enum afs_call_state to)
950 {
951 bool ok = false;
952
953 spin_lock_bh(&call->state_lock);
954 if (call->state == from) {
955 call->state = to;
956 trace_afs_call_state(call, from, to, 0, 0);
957 ok = true;
958 }
959 spin_unlock_bh(&call->state_lock);
960 return ok;
961 }
962
963 static inline void afs_set_call_complete(struct afs_call *call,
964 int error, u32 remote_abort)
965 {
966 enum afs_call_state state;
967 bool ok = false;
968
969 spin_lock_bh(&call->state_lock);
970 state = call->state;
971 if (state != AFS_CALL_COMPLETE) {
972 call->abort_code = remote_abort;
973 call->error = error;
974 call->state = AFS_CALL_COMPLETE;
975 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
976 error, remote_abort);
977 ok = true;
978 }
979 spin_unlock_bh(&call->state_lock);
980 if (ok)
981 trace_afs_call_done(call);
982 }
983
984 /*
985 * security.c
986 */
987 extern void afs_put_permits(struct afs_permits *);
988 extern void afs_clear_permits(struct afs_vnode *);
989 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int);
990 extern void afs_zap_permits(struct rcu_head *);
991 extern struct key *afs_request_key(struct afs_cell *);
992 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
993 extern int afs_permission(struct inode *, int);
994 extern void __exit afs_clean_up_permit_cache(void);
995
996 /*
997 * server.c
998 */
999 extern spinlock_t afs_server_peer_lock;
1000
1001 static inline struct afs_server *afs_get_server(struct afs_server *server)
1002 {
1003 atomic_inc(&server->usage);
1004 return server;
1005 }
1006
1007 extern struct afs_server *afs_find_server(struct afs_net *,
1008 const struct sockaddr_rxrpc *);
1009 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1010 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *);
1011 extern void afs_put_server(struct afs_net *, struct afs_server *);
1012 extern void afs_manage_servers(struct work_struct *);
1013 extern void afs_servers_timer(struct timer_list *);
1014 extern void __net_exit afs_purge_servers(struct afs_net *);
1015 extern bool afs_probe_fileserver(struct afs_fs_cursor *);
1016 extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *);
1017
1018 /*
1019 * server_list.c
1020 */
1021 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1022 {
1023 refcount_inc(&slist->usage);
1024 return slist;
1025 }
1026
1027 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1028 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1029 struct afs_vldb_entry *,
1030 u8);
1031 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1032
1033 /*
1034 * super.c
1035 */
1036 extern int __init afs_fs_init(void);
1037 extern void afs_fs_exit(void);
1038
1039 /*
1040 * vlclient.c
1041 */
1042 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *,
1043 struct afs_addr_cursor *,
1044 struct key *, const char *, int);
1045 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *,
1046 struct key *, const uuid_t *);
1047 extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *);
1048 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *,
1049 struct key *, const uuid_t *);
1050
1051 /*
1052 * volume.c
1053 */
1054 static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume)
1055 {
1056 if (volume)
1057 atomic_inc(&volume->usage);
1058 return volume;
1059 }
1060
1061 extern struct afs_volume *afs_create_volume(struct afs_mount_params *);
1062 extern void afs_activate_volume(struct afs_volume *);
1063 extern void afs_deactivate_volume(struct afs_volume *);
1064 extern void afs_put_volume(struct afs_cell *, struct afs_volume *);
1065 extern int afs_check_volume_status(struct afs_volume *, struct key *);
1066
1067 /*
1068 * write.c
1069 */
1070 extern int afs_set_page_dirty(struct page *);
1071 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1072 loff_t pos, unsigned len, unsigned flags,
1073 struct page **pagep, void **fsdata);
1074 extern int afs_write_end(struct file *file, struct address_space *mapping,
1075 loff_t pos, unsigned len, unsigned copied,
1076 struct page *page, void *fsdata);
1077 extern int afs_writepage(struct page *, struct writeback_control *);
1078 extern int afs_writepages(struct address_space *, struct writeback_control *);
1079 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
1080 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1081 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1082 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1083 extern void afs_prune_wb_keys(struct afs_vnode *);
1084 extern int afs_launder_page(struct page *);
1085
1086 /*
1087 * xattr.c
1088 */
1089 extern const struct xattr_handler *afs_xattr_handlers[];
1090 extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1091
1092
1093 /*
1094 * Miscellaneous inline functions.
1095 */
1096 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1097 {
1098 return container_of(inode, struct afs_vnode, vfs_inode);
1099 }
1100
1101 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1102 {
1103 return &vnode->vfs_inode;
1104 }
1105
1106 static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc,
1107 struct afs_vnode *vnode,
1108 unsigned int cb_break)
1109 {
1110 if (fc->ac.error == 0)
1111 afs_cache_permit(vnode, fc->key, cb_break);
1112 }
1113
1114 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc,
1115 struct afs_vnode *vnode)
1116 {
1117 if (fc->ac.error == -ENOENT) {
1118 set_bit(AFS_VNODE_DELETED, &vnode->flags);
1119 afs_break_callback(vnode);
1120 }
1121 }
1122
1123
1124 /*****************************************************************************/
1125 /*
1126 * debug tracing
1127 */
1128 extern unsigned afs_debug;
1129
1130 #define dbgprintk(FMT,...) \
1131 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1132
1133 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1134 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1135 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1136
1137
1138 #if defined(__KDEBUG)
1139 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1140 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1141 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1142
1143 #elif defined(CONFIG_AFS_DEBUG)
1144 #define AFS_DEBUG_KENTER 0x01
1145 #define AFS_DEBUG_KLEAVE 0x02
1146 #define AFS_DEBUG_KDEBUG 0x04
1147
1148 #define _enter(FMT,...) \
1149 do { \
1150 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1151 kenter(FMT,##__VA_ARGS__); \
1152 } while (0)
1153
1154 #define _leave(FMT,...) \
1155 do { \
1156 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1157 kleave(FMT,##__VA_ARGS__); \
1158 } while (0)
1159
1160 #define _debug(FMT,...) \
1161 do { \
1162 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1163 kdebug(FMT,##__VA_ARGS__); \
1164 } while (0)
1165
1166 #else
1167 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1168 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1169 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1170 #endif
1171
1172 /*
1173 * debug assertion checking
1174 */
1175 #if 1 // defined(__KDEBUGALL)
1176
1177 #define ASSERT(X) \
1178 do { \
1179 if (unlikely(!(X))) { \
1180 printk(KERN_ERR "\n"); \
1181 printk(KERN_ERR "AFS: Assertion failed\n"); \
1182 BUG(); \
1183 } \
1184 } while(0)
1185
1186 #define ASSERTCMP(X, OP, Y) \
1187 do { \
1188 if (unlikely(!((X) OP (Y)))) { \
1189 printk(KERN_ERR "\n"); \
1190 printk(KERN_ERR "AFS: Assertion failed\n"); \
1191 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1192 (unsigned long)(X), (unsigned long)(Y)); \
1193 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1194 (unsigned long)(X), (unsigned long)(Y)); \
1195 BUG(); \
1196 } \
1197 } while(0)
1198
1199 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1200 do { \
1201 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1202 printk(KERN_ERR "\n"); \
1203 printk(KERN_ERR "AFS: Assertion failed\n"); \
1204 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1205 (unsigned long)(L), (unsigned long)(N), \
1206 (unsigned long)(H)); \
1207 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1208 (unsigned long)(L), (unsigned long)(N), \
1209 (unsigned long)(H)); \
1210 BUG(); \
1211 } \
1212 } while(0)
1213
1214 #define ASSERTIF(C, X) \
1215 do { \
1216 if (unlikely((C) && !(X))) { \
1217 printk(KERN_ERR "\n"); \
1218 printk(KERN_ERR "AFS: Assertion failed\n"); \
1219 BUG(); \
1220 } \
1221 } while(0)
1222
1223 #define ASSERTIFCMP(C, X, OP, Y) \
1224 do { \
1225 if (unlikely((C) && !((X) OP (Y)))) { \
1226 printk(KERN_ERR "\n"); \
1227 printk(KERN_ERR "AFS: Assertion failed\n"); \
1228 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1229 (unsigned long)(X), (unsigned long)(Y)); \
1230 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1231 (unsigned long)(X), (unsigned long)(Y)); \
1232 BUG(); \
1233 } \
1234 } while(0)
1235
1236 #else
1237
1238 #define ASSERT(X) \
1239 do { \
1240 } while(0)
1241
1242 #define ASSERTCMP(X, OP, Y) \
1243 do { \
1244 } while(0)
1245
1246 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1247 do { \
1248 } while(0)
1249
1250 #define ASSERTIF(C, X) \
1251 do { \
1252 } while(0)
1253
1254 #define ASSERTIFCMP(C, X, OP, Y) \
1255 do { \
1256 } while(0)
1257
1258 #endif /* __KDEBUGALL */
Linux with added FPC-III support