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