1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* internal AFS stuff
3 *
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/compiler.h>
9 #include <linux/kernel.h>
10 #include <linux/ktime.h>
11 #include <linux/fs.h>
12 #include <linux/filelock.h>
13 #include <linux/pagemap.h>
14 #include <linux/rxrpc.h>
15 #include <linux/key.h>
16 #include <linux/workqueue.h>
17 #include <linux/sched.h>
18 #include <linux/fscache.h>
19 #include <linux/backing-dev.h>
20 #include <linux/uuid.h>
21 #include <linux/mm_types.h>
22 #include <linux/dns_resolver.h>
23 #include <net/net_namespace.h>
24 #include <net/netns/generic.h>
25 #include <net/sock.h>
26 #include <net/af_rxrpc.h>
27
28 #include "afs.h"
29 #include "afs_vl.h"
30
31 #define AFS_CELL_MAX_ADDRS 15
32
33 struct pagevec;
34 struct afs_call;
35 struct afs_vnode;
36
37 /*
38 * Partial file-locking emulation mode. (The problem being that AFS3 only
39 * allows whole-file locks and no upgrading/downgrading).
40 */
41 enum afs_flock_mode {
42 afs_flock_mode_unset,
43 afs_flock_mode_local, /* Local locking only */
44 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
45 afs_flock_mode_strict, /* Always get a server lock for a partial lock */
46 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
47 };
48
49 struct afs_fs_context {
50 bool force; /* T to force cell type */
51 bool autocell; /* T if set auto mount operation */
52 bool dyn_root; /* T if dynamic root */
53 bool no_cell; /* T if the source is "none" (for dynroot) */
54 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
55 afs_voltype_t type; /* type of volume requested */
56 unsigned int volnamesz; /* size of volume name */
57 const char *volname; /* name of volume to mount */
58 struct afs_net *net; /* the AFS net namespace stuff */
59 struct afs_cell *cell; /* cell in which to find volume */
60 struct afs_volume *volume; /* volume record */
61 struct key *key; /* key to use for secure mounting */
62 };
63
64 enum afs_call_state {
65 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
66 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
67 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
68 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
69 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
70 AFS_CALL_SV_REPLYING, /* Server: Replying */
71 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
72 AFS_CALL_COMPLETE, /* Completed or failed */
73 };
74
75 /*
76 * List of server addresses.
77 */
78 struct afs_addr_list {
79 struct rcu_head rcu;
80 refcount_t usage;
81 u32 version; /* Version */
82 unsigned char max_addrs;
83 unsigned char nr_addrs;
84 unsigned char preferred; /* Preferred address */
85 unsigned char nr_ipv4; /* Number of IPv4 addresses */
86 enum dns_record_source source:8;
87 enum dns_lookup_status status:8;
88 unsigned long failed; /* Mask of addrs that failed locally/ICMP */
89 unsigned long responded; /* Mask of addrs that responded */
90 struct sockaddr_rxrpc addrs[];
91 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
92 };
93
94 /*
95 * a record of an in-progress RxRPC call
96 */
97 struct afs_call {
98 const struct afs_call_type *type; /* type of call */
99 struct afs_addr_list *alist; /* Address is alist[addr_ix] */
100 wait_queue_head_t waitq; /* processes awaiting completion */
101 struct work_struct async_work; /* async I/O processor */
102 struct work_struct work; /* actual work processor */
103 struct rxrpc_call *rxcall; /* RxRPC call handle */
104 struct key *key; /* security for this call */
105 struct afs_net *net; /* The network namespace */
106 struct afs_server *server; /* The fileserver record if fs op (pins ref) */
107 struct afs_vlserver *vlserver; /* The vlserver record if vl op */
108 void *request; /* request data (first part) */
109 size_t iov_len; /* Size of *iter to be used */
110 struct iov_iter def_iter; /* Default buffer/data iterator */
111 struct iov_iter *write_iter; /* Iterator defining write to be made */
112 struct iov_iter *iter; /* Iterator currently in use */
113 union { /* Convenience for ->def_iter */
114 struct kvec kvec[1];
115 struct bio_vec bvec[1];
116 };
117 void *buffer; /* reply receive buffer */
118 union {
119 long ret0; /* Value to reply with instead of 0 */
120 struct afs_addr_list *ret_alist;
121 struct afs_vldb_entry *ret_vldb;
122 char *ret_str;
123 };
124 struct afs_operation *op;
125 unsigned int server_index;
126 refcount_t ref;
127 enum afs_call_state state;
128 spinlock_t state_lock;
129 int error; /* error code */
130 u32 abort_code; /* Remote abort ID or 0 */
131 unsigned int max_lifespan; /* Maximum lifespan in secs to set if not 0 */
132 unsigned request_size; /* size of request data */
133 unsigned reply_max; /* maximum size of reply */
134 unsigned count2; /* count used in unmarshalling */
135 unsigned char unmarshall; /* unmarshalling phase */
136 unsigned char addr_ix; /* Address in ->alist */
137 bool drop_ref; /* T if need to drop ref for incoming call */
138 bool need_attention; /* T if RxRPC poked us */
139 bool async; /* T if asynchronous */
140 bool upgrade; /* T to request service upgrade */
141 bool intr; /* T if interruptible */
142 bool unmarshalling_error; /* T if an unmarshalling error occurred */
143 u16 service_id; /* Actual service ID (after upgrade) */
144 unsigned int debug_id; /* Trace ID */
145 u32 operation_ID; /* operation ID for an incoming call */
146 u32 count; /* count for use in unmarshalling */
147 union { /* place to extract temporary data */
148 struct {
149 __be32 tmp_u;
150 __be32 tmp;
151 } __attribute__((packed));
152 __be64 tmp64;
153 };
154 ktime_t issue_time; /* Time of issue of operation */
155 };
156
157 struct afs_call_type {
158 const char *name;
159 unsigned int op; /* Really enum afs_fs_operation */
160
161 /* deliver request or reply data to an call
162 * - returning an error will cause the call to be aborted
163 */
164 int (*deliver)(struct afs_call *call);
165
166 /* clean up a call */
167 void (*destructor)(struct afs_call *call);
168
169 /* Work function */
170 void (*work)(struct work_struct *work);
171
172 /* Call done function (gets called immediately on success or failure) */
173 void (*done)(struct afs_call *call);
174 };
175
176 /*
177 * Key available for writeback on a file.
178 */
179 struct afs_wb_key {
180 refcount_t usage;
181 struct key *key;
182 struct list_head vnode_link; /* Link in vnode->wb_keys */
183 };
184
185 /*
186 * AFS open file information record. Pointed to by file->private_data.
187 */
188 struct afs_file {
189 struct key *key; /* The key this file was opened with */
190 struct afs_wb_key *wb; /* Writeback key record for this file */
191 };
192
afs_file_key(struct file * file)193 static inline struct key *afs_file_key(struct file *file)
194 {
195 struct afs_file *af = file->private_data;
196
197 return af->key;
198 }
199
200 /*
201 * Record of an outstanding read operation on a vnode.
202 */
203 struct afs_read {
204 loff_t pos; /* Where to start reading */
205 loff_t len; /* How much we're asking for */
206 loff_t actual_len; /* How much we're actually getting */
207 loff_t file_size; /* File size returned by server */
208 struct key *key; /* The key to use to reissue the read */
209 struct afs_vnode *vnode; /* The file being read into. */
210 struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */
211 afs_dataversion_t data_version; /* Version number returned by server */
212 refcount_t usage;
213 unsigned int call_debug_id;
214 unsigned int nr_pages;
215 int error;
216 void (*done)(struct afs_read *);
217 void (*cleanup)(struct afs_read *);
218 struct iov_iter *iter; /* Iterator representing the buffer */
219 struct iov_iter def_iter; /* Default iterator */
220 };
221
222 /*
223 * AFS superblock private data
224 * - there's one superblock per volume
225 */
226 struct afs_super_info {
227 struct net *net_ns; /* Network namespace */
228 struct afs_cell *cell; /* The cell in which the volume resides */
229 struct afs_volume *volume; /* volume record */
230 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
231 bool dyn_root; /* True if dynamic root */
232 };
233
AFS_FS_S(struct super_block * sb)234 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
235 {
236 return sb->s_fs_info;
237 }
238
239 extern struct file_system_type afs_fs_type;
240
241 /*
242 * Set of substitutes for @sys.
243 */
244 struct afs_sysnames {
245 #define AFS_NR_SYSNAME 16
246 char *subs[AFS_NR_SYSNAME];
247 refcount_t usage;
248 unsigned short nr;
249 char blank[1];
250 };
251
252 /*
253 * AFS network namespace record.
254 */
255 struct afs_net {
256 struct net *net; /* Backpointer to the owning net namespace */
257 struct afs_uuid uuid;
258 bool live; /* F if this namespace is being removed */
259
260 /* AF_RXRPC I/O stuff */
261 struct socket *socket;
262 struct afs_call *spare_incoming_call;
263 struct work_struct charge_preallocation_work;
264 struct mutex socket_mutex;
265 atomic_t nr_outstanding_calls;
266 atomic_t nr_superblocks;
267
268 /* Cell database */
269 struct rb_root cells;
270 struct afs_cell *ws_cell;
271 struct work_struct cells_manager;
272 struct timer_list cells_timer;
273 atomic_t cells_outstanding;
274 struct rw_semaphore cells_lock;
275 struct mutex cells_alias_lock;
276
277 struct mutex proc_cells_lock;
278 struct hlist_head proc_cells;
279
280 /* Known servers. Theoretically each fileserver can only be in one
281 * cell, but in practice, people create aliases and subsets and there's
282 * no easy way to distinguish them.
283 */
284 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */
285 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
286 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */
287 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */
288 struct hlist_head fs_proc; /* procfs servers list */
289
290 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
291 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
292 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
293
294 struct work_struct fs_manager;
295 struct timer_list fs_timer;
296
297 struct work_struct fs_prober;
298 struct timer_list fs_probe_timer;
299 atomic_t servers_outstanding;
300
301 /* File locking renewal management */
302 struct mutex lock_manager_mutex;
303
304 /* Misc */
305 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
306 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
307 struct afs_sysnames *sysnames;
308 rwlock_t sysnames_lock;
309
310 /* Statistics counters */
311 atomic_t n_lookup; /* Number of lookups done */
312 atomic_t n_reval; /* Number of dentries needing revalidation */
313 atomic_t n_inval; /* Number of invalidations by the server */
314 atomic_t n_relpg; /* Number of invalidations by release_folio */
315 atomic_t n_read_dir; /* Number of directory pages read */
316 atomic_t n_dir_cr; /* Number of directory entry creation edits */
317 atomic_t n_dir_rm; /* Number of directory entry removal edits */
318 atomic_t n_stores; /* Number of store ops */
319 atomic_long_t n_store_bytes; /* Number of bytes stored */
320 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
321 atomic_t n_fetches; /* Number of data fetch ops */
322 };
323
324 extern const char afs_init_sysname[];
325
326 enum afs_cell_state {
327 AFS_CELL_UNSET,
328 AFS_CELL_ACTIVATING,
329 AFS_CELL_ACTIVE,
330 AFS_CELL_DEACTIVATING,
331 AFS_CELL_INACTIVE,
332 AFS_CELL_FAILED,
333 AFS_CELL_REMOVED,
334 };
335
336 /*
337 * AFS cell record.
338 *
339 * This is a tricky concept to get right as it is possible to create aliases
340 * simply by pointing AFSDB/SRV records for two names at the same set of VL
341 * servers; it is also possible to do things like setting up two sets of VL
342 * servers, one of which provides a superset of the volumes provided by the
343 * other (for internal/external division, for example).
344 *
345 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
346 * servers and (b) a cell's name is used by the client to select the key to use
347 * for authentication and encryption. The cell name is not typically used in
348 * the protocol.
349 *
350 * Two cells are determined to be aliases if they have an explicit alias (YFS
351 * only), share any VL servers in common or have at least one volume in common.
352 * "In common" means that the address list of the VL servers or the fileservers
353 * share at least one endpoint.
354 */
355 struct afs_cell {
356 union {
357 struct rcu_head rcu;
358 struct rb_node net_node; /* Node in net->cells */
359 };
360 struct afs_net *net;
361 struct afs_cell *alias_of; /* The cell this is an alias of */
362 struct afs_volume *root_volume; /* The root.cell volume if there is one */
363 struct key *anonymous_key; /* anonymous user key for this cell */
364 struct work_struct manager; /* Manager for init/deinit/dns */
365 struct hlist_node proc_link; /* /proc cell list link */
366 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
367 time64_t last_inactive; /* Time of last drop of usage count */
368 refcount_t ref; /* Struct refcount */
369 atomic_t active; /* Active usage counter */
370 unsigned long flags;
371 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
372 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
373 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */
374 enum afs_cell_state state;
375 short error;
376 enum dns_record_source dns_source:8; /* Latest source of data from lookup */
377 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
378 unsigned int dns_lookup_count; /* Counter of DNS lookups */
379 unsigned int debug_id;
380
381 /* The volumes belonging to this cell */
382 struct rb_root volumes; /* Tree of volumes on this server */
383 struct hlist_head proc_volumes; /* procfs volume list */
384 seqlock_t volume_lock; /* For volumes */
385
386 /* Active fileserver interaction state. */
387 struct rb_root fs_servers; /* afs_server (by server UUID) */
388 seqlock_t fs_lock; /* For fs_servers */
389 struct rw_semaphore fs_open_mmaps_lock;
390 struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */
391 atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */
392
393 /* VL server list. */
394 rwlock_t vl_servers_lock; /* Lock on vl_servers */
395 struct afs_vlserver_list __rcu *vl_servers;
396
397 u8 name_len; /* Length of name */
398 char *name; /* Cell name, case-flattened and NUL-padded */
399 };
400
401 /*
402 * Volume Location server record.
403 */
404 struct afs_vlserver {
405 struct rcu_head rcu;
406 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
407 unsigned long flags;
408 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
409 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
410 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
411 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */
412 rwlock_t lock; /* Lock on addresses */
413 refcount_t ref;
414 unsigned int rtt; /* Server's current RTT in uS */
415
416 /* Probe state */
417 wait_queue_head_t probe_wq;
418 atomic_t probe_outstanding;
419 spinlock_t probe_lock;
420 struct {
421 unsigned int rtt; /* RTT in uS */
422 u32 abort_code;
423 short error;
424 unsigned short flags;
425 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */
426 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */
427 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */
428 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */
429 } probe;
430
431 u16 port;
432 u16 name_len; /* Length of name */
433 char name[]; /* Server name, case-flattened */
434 };
435
436 /*
437 * Weighted list of Volume Location servers.
438 */
439 struct afs_vlserver_entry {
440 u16 priority; /* Preference (as SRV) */
441 u16 weight; /* Weight (as SRV) */
442 enum dns_record_source source:8;
443 enum dns_lookup_status status:8;
444 struct afs_vlserver *server;
445 };
446
447 struct afs_vlserver_list {
448 struct rcu_head rcu;
449 refcount_t ref;
450 u8 nr_servers;
451 u8 index; /* Server currently in use */
452 u8 preferred; /* Preferred server */
453 enum dns_record_source source:8;
454 enum dns_lookup_status status:8;
455 rwlock_t lock;
456 struct afs_vlserver_entry servers[];
457 };
458
459 /*
460 * Cached VLDB entry.
461 *
462 * This is pointed to by cell->vldb_entries, indexed by name.
463 */
464 struct afs_vldb_entry {
465 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
466
467 unsigned long flags;
468 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
469 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
470 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
471 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
472 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
473
474 uuid_t fs_server[AFS_NMAXNSERVERS];
475 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */
476 u8 fs_mask[AFS_NMAXNSERVERS];
477 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
478 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
479 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
480 short error;
481 u8 nr_servers; /* Number of server records */
482 u8 name_len;
483 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
484 };
485
486 /*
487 * Record of fileserver with which we're actively communicating.
488 */
489 struct afs_server {
490 struct rcu_head rcu;
491 union {
492 uuid_t uuid; /* Server ID */
493 struct afs_uuid _uuid;
494 };
495
496 struct afs_addr_list __rcu *addresses;
497 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
498 struct rb_node uuid_rb; /* Link in net->fs_servers */
499 struct afs_server __rcu *uuid_next; /* Next server with same UUID */
500 struct afs_server *uuid_prev; /* Previous server with same UUID */
501 struct list_head probe_link; /* Link in net->fs_probe_list */
502 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
503 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
504 struct hlist_node proc_link; /* Link in net->fs_proc */
505 struct work_struct initcb_work; /* Work for CB.InitCallBackState* */
506 struct afs_server *gc_next; /* Next server in manager's list */
507 time64_t unuse_time; /* Time at which last unused */
508 unsigned long flags;
509 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */
510 #define AFS_SERVER_FL_UPDATING 1
511 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */
512 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */
513 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */
514 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */
515 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
516 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */
517 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */
518 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */
519 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */
520 refcount_t ref; /* Object refcount */
521 atomic_t active; /* Active user count */
522 u32 addr_version; /* Address list version */
523 unsigned int rtt; /* Server's current RTT in uS */
524 unsigned int debug_id; /* Debugging ID for traces */
525
526 /* file service access */
527 rwlock_t fs_lock; /* access lock */
528
529 /* callback promise management */
530 unsigned cb_s_break; /* Break-everything counter. */
531
532 /* Probe state */
533 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */
534 wait_queue_head_t probe_wq;
535 atomic_t probe_outstanding;
536 spinlock_t probe_lock;
537 struct {
538 unsigned int rtt; /* RTT in uS */
539 u32 abort_code;
540 short error;
541 bool responded:1;
542 bool is_yfs:1;
543 bool not_yfs:1;
544 bool local_failure:1;
545 } probe;
546 };
547
548 /*
549 * Replaceable volume server list.
550 */
551 struct afs_server_entry {
552 struct afs_server *server;
553 };
554
555 struct afs_server_list {
556 struct rcu_head rcu;
557 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */
558 refcount_t usage;
559 unsigned char nr_servers;
560 unsigned char preferred; /* Preferred server */
561 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
562 unsigned int seq; /* Set to ->servers_seq when installed */
563 rwlock_t lock;
564 struct afs_server_entry servers[];
565 };
566
567 /*
568 * Live AFS volume management.
569 */
570 struct afs_volume {
571 union {
572 struct rcu_head rcu;
573 afs_volid_t vid; /* volume ID */
574 };
575 refcount_t ref;
576 time64_t update_at; /* Time at which to next update */
577 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
578 struct rb_node cell_node; /* Link in cell->volumes */
579 struct hlist_node proc_link; /* Link in cell->proc_volumes */
580 struct super_block __rcu *sb; /* Superblock on which inodes reside */
581 unsigned long flags;
582 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
583 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
584 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
585 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
586 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
587 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
588 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */
589 #define AFS_VOLUME_RM_TREE 7 /* - Set if volume removed from cell->volumes */
590 #ifdef CONFIG_AFS_FSCACHE
591 struct fscache_volume *cache; /* Caching cookie */
592 #endif
593 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */
594 rwlock_t servers_lock; /* Lock for ->servers */
595 unsigned int servers_seq; /* Incremented each time ->servers changes */
596
597 unsigned cb_v_break; /* Break-everything counter. */
598 rwlock_t cb_v_break_lock;
599
600 afs_voltype_t type; /* type of volume */
601 char type_force; /* force volume type (suppress R/O -> R/W) */
602 u8 name_len;
603 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
604 };
605
606 enum afs_lock_state {
607 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
608 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
609 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
610 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
611 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
612 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
613 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
614 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
615 };
616
617 /*
618 * AFS inode private data.
619 *
620 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
621 * leak from one inode to another.
622 */
623 struct afs_vnode {
624 struct netfs_inode netfs; /* Netfslib context and vfs inode */
625 struct afs_volume *volume; /* volume on which vnode resides */
626 struct afs_fid fid; /* the file identifier for this inode */
627 struct afs_file_status status; /* AFS status info for this file */
628 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
629 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
630 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
631 struct rw_semaphore validate_lock; /* lock for validating this vnode */
632 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
633 struct key *silly_key; /* Silly rename key */
634 spinlock_t wb_lock; /* lock for wb_keys */
635 spinlock_t lock; /* waitqueue/flags lock */
636 unsigned long flags;
637 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
638 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
639 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
640 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
641 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
642 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
643 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
644 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
645 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
646 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */
647 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */
648
649 struct list_head wb_keys; /* List of keys available for writeback */
650 struct list_head pending_locks; /* locks waiting to be granted */
651 struct list_head granted_locks; /* locks granted on this file */
652 struct delayed_work lock_work; /* work to be done in locking */
653 struct key *lock_key; /* Key to be used in lock ops */
654 ktime_t locked_at; /* Time at which lock obtained */
655 enum afs_lock_state lock_state : 8;
656 afs_lock_type_t lock_type : 8;
657
658 /* outstanding callback notification on this file */
659 struct work_struct cb_work; /* Work for mmap'd files */
660 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */
661 void *cb_server; /* Server with callback/filelock */
662 atomic_t cb_nr_mmap; /* Number of mmaps */
663 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */
664 unsigned int cb_s_break; /* Mass break counter on ->server */
665 unsigned int cb_v_break; /* Mass break counter on ->volume */
666 unsigned int cb_break; /* Break counter on vnode */
667 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */
668
669 time64_t cb_expires_at; /* time at which callback expires */
670 };
671
afs_vnode_cache(struct afs_vnode * vnode)672 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
673 {
674 #ifdef CONFIG_AFS_FSCACHE
675 return netfs_i_cookie(&vnode->netfs);
676 #else
677 return NULL;
678 #endif
679 }
680
afs_vnode_set_cache(struct afs_vnode * vnode,struct fscache_cookie * cookie)681 static inline void afs_vnode_set_cache(struct afs_vnode *vnode,
682 struct fscache_cookie *cookie)
683 {
684 #ifdef CONFIG_AFS_FSCACHE
685 vnode->netfs.cache = cookie;
686 if (cookie)
687 mapping_set_release_always(vnode->netfs.inode.i_mapping);
688 #endif
689 }
690
691 /*
692 * cached security record for one user's attempt to access a vnode
693 */
694 struct afs_permit {
695 struct key *key; /* RxRPC ticket holding a security context */
696 afs_access_t access; /* CallerAccess value for this key */
697 };
698
699 /*
700 * Immutable cache of CallerAccess records from attempts to access vnodes.
701 * These may be shared between multiple vnodes.
702 */
703 struct afs_permits {
704 struct rcu_head rcu;
705 struct hlist_node hash_node; /* Link in hash */
706 unsigned long h; /* Hash value for this permit list */
707 refcount_t usage;
708 unsigned short nr_permits; /* Number of records */
709 bool invalidated; /* Invalidated due to key change */
710 struct afs_permit permits[]; /* List of permits sorted by key pointer */
711 };
712
713 /*
714 * Error prioritisation and accumulation.
715 */
716 struct afs_error {
717 short error; /* Accumulated error */
718 bool responded; /* T if server responded */
719 };
720
721 /*
722 * Cursor for iterating over a server's address list.
723 */
724 struct afs_addr_cursor {
725 struct afs_addr_list *alist; /* Current address list (pins ref) */
726 unsigned long tried; /* Tried addresses */
727 signed char index; /* Current address */
728 bool responded; /* T if the current address responded */
729 unsigned short nr_iterations; /* Number of address iterations */
730 short error;
731 u32 abort_code;
732 };
733
734 /*
735 * Cursor for iterating over a set of volume location servers.
736 */
737 struct afs_vl_cursor {
738 struct afs_addr_cursor ac;
739 struct afs_cell *cell; /* The cell we're querying */
740 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
741 struct afs_vlserver *server; /* Server on which this resides */
742 struct key *key; /* Key for the server */
743 unsigned long untried; /* Bitmask of untried servers */
744 short index; /* Current server */
745 short error;
746 unsigned short flags;
747 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
748 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
749 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
750 unsigned short nr_iterations; /* Number of server iterations */
751 };
752
753 /*
754 * Fileserver operation methods.
755 */
756 struct afs_operation_ops {
757 void (*issue_afs_rpc)(struct afs_operation *op);
758 void (*issue_yfs_rpc)(struct afs_operation *op);
759 void (*success)(struct afs_operation *op);
760 void (*aborted)(struct afs_operation *op);
761 void (*failed)(struct afs_operation *op);
762 void (*edit_dir)(struct afs_operation *op);
763 void (*put)(struct afs_operation *op);
764 };
765
766 struct afs_vnode_param {
767 struct afs_vnode *vnode;
768 struct afs_fid fid; /* Fid to access */
769 struct afs_status_cb scb; /* Returned status and callback promise */
770 afs_dataversion_t dv_before; /* Data version before the call */
771 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */
772 u8 dv_delta; /* Expected change in data version */
773 bool put_vnode:1; /* T if we have a ref on the vnode */
774 bool need_io_lock:1; /* T if we need the I/O lock on this */
775 bool update_ctime:1; /* Need to update the ctime */
776 bool set_size:1; /* Must update i_size */
777 bool op_unlinked:1; /* True if file was unlinked by op */
778 bool speculative:1; /* T if speculative status fetch (no vnode lock) */
779 bool modification:1; /* Set if the content gets modified */
780 };
781
782 /*
783 * Fileserver operation wrapper, handling server and address rotation
784 * asynchronously. May make simultaneous calls to multiple servers.
785 */
786 struct afs_operation {
787 struct afs_net *net; /* Network namespace */
788 struct key *key; /* Key for the cell */
789 const struct afs_call_type *type; /* Type of call done */
790 const struct afs_operation_ops *ops;
791
792 /* Parameters/results for the operation */
793 struct afs_volume *volume; /* Volume being accessed */
794 struct afs_vnode_param file[2];
795 struct afs_vnode_param *more_files;
796 struct afs_volsync volsync;
797 struct dentry *dentry; /* Dentry to be altered */
798 struct dentry *dentry_2; /* Second dentry to be altered */
799 struct timespec64 mtime; /* Modification time to record */
800 struct timespec64 ctime; /* Change time to set */
801 short nr_files; /* Number of entries in file[], more_files */
802 short error;
803 unsigned int debug_id;
804
805 unsigned int cb_v_break; /* Volume break counter before op */
806 unsigned int cb_s_break; /* Server break counter before op */
807
808 union {
809 struct {
810 int which; /* Which ->file[] to fetch for */
811 } fetch_status;
812 struct {
813 int reason; /* enum afs_edit_dir_reason */
814 mode_t mode;
815 const char *symlink;
816 } create;
817 struct {
818 bool need_rehash;
819 } unlink;
820 struct {
821 struct dentry *rehash;
822 struct dentry *tmp;
823 bool new_negative;
824 } rename;
825 struct {
826 struct afs_read *req;
827 } fetch;
828 struct {
829 afs_lock_type_t type;
830 } lock;
831 struct {
832 struct iov_iter *write_iter;
833 loff_t pos;
834 loff_t size;
835 loff_t i_size;
836 bool laundering; /* Laundering page, PG_writeback not set */
837 } store;
838 struct {
839 struct iattr *attr;
840 loff_t old_i_size;
841 } setattr;
842 struct afs_acl *acl;
843 struct yfs_acl *yacl;
844 struct {
845 struct afs_volume_status vs;
846 struct kstatfs *buf;
847 } volstatus;
848 };
849
850 /* Fileserver iteration state */
851 struct afs_addr_cursor ac;
852 struct afs_server_list *server_list; /* Current server list (pins ref) */
853 struct afs_server *server; /* Server we're using (ref pinned by server_list) */
854 struct afs_call *call;
855 unsigned long untried; /* Bitmask of untried servers */
856 short index; /* Current server */
857 unsigned short nr_iterations; /* Number of server iterations */
858
859 unsigned int flags;
860 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */
861 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */
862 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */
863 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */
864 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
865 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
866 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */
867 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */
868 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */
869 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */
870 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */
871 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */
872 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */
873 };
874
875 /*
876 * Cache auxiliary data.
877 */
878 struct afs_vnode_cache_aux {
879 __be64 data_version;
880 } __packed;
881
afs_set_cache_aux(struct afs_vnode * vnode,struct afs_vnode_cache_aux * aux)882 static inline void afs_set_cache_aux(struct afs_vnode *vnode,
883 struct afs_vnode_cache_aux *aux)
884 {
885 aux->data_version = cpu_to_be64(vnode->status.data_version);
886 }
887
afs_invalidate_cache(struct afs_vnode * vnode,unsigned int flags)888 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags)
889 {
890 struct afs_vnode_cache_aux aux;
891
892 afs_set_cache_aux(vnode, &aux);
893 fscache_invalidate(afs_vnode_cache(vnode), &aux,
894 i_size_read(&vnode->netfs.inode), flags);
895 }
896
897 /*
898 * We use folio->private to hold the amount of the folio that we've written to,
899 * splitting the field into two parts. However, we need to represent a range
900 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio
901 * exceeds what we can encode.
902 */
903 #ifdef CONFIG_64BIT
904 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL
905 #define __AFS_FOLIO_PRIV_SHIFT 32
906 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL
907 #else
908 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL
909 #define __AFS_FOLIO_PRIV_SHIFT 16
910 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL
911 #endif
912
afs_folio_dirty_resolution(struct folio * folio)913 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio)
914 {
915 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1);
916 return (shift > 0) ? shift : 0;
917 }
918
afs_folio_dirty_from(struct folio * folio,unsigned long priv)919 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv)
920 {
921 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK;
922
923 /* The lower bound is inclusive */
924 return x << afs_folio_dirty_resolution(folio);
925 }
926
afs_folio_dirty_to(struct folio * folio,unsigned long priv)927 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv)
928 {
929 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK;
930
931 /* The upper bound is immediately beyond the region */
932 return (x + 1) << afs_folio_dirty_resolution(folio);
933 }
934
afs_folio_dirty(struct folio * folio,size_t from,size_t to)935 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to)
936 {
937 unsigned int res = afs_folio_dirty_resolution(folio);
938 from >>= res;
939 to = (to - 1) >> res;
940 return (to << __AFS_FOLIO_PRIV_SHIFT) | from;
941 }
942
afs_folio_dirty_mmapped(unsigned long priv)943 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv)
944 {
945 return priv | __AFS_FOLIO_PRIV_MMAPPED;
946 }
947
afs_is_folio_dirty_mmapped(unsigned long priv)948 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv)
949 {
950 return priv & __AFS_FOLIO_PRIV_MMAPPED;
951 }
952
953 #include <trace/events/afs.h>
954
955 /*****************************************************************************/
956 /*
957 * addr_list.c
958 */
afs_get_addrlist(struct afs_addr_list * alist)959 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
960 {
961 if (alist)
962 refcount_inc(&alist->usage);
963 return alist;
964 }
965 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
966 unsigned short,
967 unsigned short);
968 extern void afs_put_addrlist(struct afs_addr_list *);
969 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
970 const char *, size_t, char,
971 unsigned short, unsigned short);
972 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
973 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
974 extern int afs_end_cursor(struct afs_addr_cursor *);
975
976 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
977 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
978
979 /*
980 * callback.c
981 */
982 extern void afs_invalidate_mmap_work(struct work_struct *);
983 extern void afs_server_init_callback_work(struct work_struct *work);
984 extern void afs_init_callback_state(struct afs_server *);
985 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
986 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
987 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
988
afs_calc_vnode_cb_break(struct afs_vnode * vnode)989 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
990 {
991 return vnode->cb_break + vnode->cb_v_break;
992 }
993
afs_cb_is_broken(unsigned int cb_break,const struct afs_vnode * vnode)994 static inline bool afs_cb_is_broken(unsigned int cb_break,
995 const struct afs_vnode *vnode)
996 {
997 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break);
998 }
999
1000 /*
1001 * cell.c
1002 */
1003 extern int afs_cell_init(struct afs_net *, const char *);
1004 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned,
1005 enum afs_cell_trace);
1006 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
1007 const char *, bool);
1008 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace);
1009 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace);
1010 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace);
1011 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace);
1012 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace);
1013 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace);
1014 extern void afs_manage_cells(struct work_struct *);
1015 extern void afs_cells_timer(struct timer_list *);
1016 extern void __net_exit afs_cell_purge(struct afs_net *);
1017
1018 /*
1019 * cmservice.c
1020 */
1021 extern bool afs_cm_incoming_call(struct afs_call *);
1022
1023 /*
1024 * dir.c
1025 */
1026 extern const struct file_operations afs_dir_file_operations;
1027 extern const struct inode_operations afs_dir_inode_operations;
1028 extern const struct address_space_operations afs_dir_aops;
1029 extern const struct dentry_operations afs_fs_dentry_operations;
1030
1031 extern void afs_d_release(struct dentry *);
1032 extern void afs_check_for_remote_deletion(struct afs_operation *);
1033
1034 /*
1035 * dir_edit.c
1036 */
1037 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
1038 enum afs_edit_dir_reason);
1039 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
1040
1041 /*
1042 * dir_silly.c
1043 */
1044 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
1045 struct dentry *, struct key *);
1046 extern int afs_silly_iput(struct dentry *, struct inode *);
1047
1048 /*
1049 * dynroot.c
1050 */
1051 extern const struct inode_operations afs_dynroot_inode_operations;
1052 extern const struct dentry_operations afs_dynroot_dentry_operations;
1053
1054 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
1055 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
1056 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
1057 extern int afs_dynroot_populate(struct super_block *);
1058 extern void afs_dynroot_depopulate(struct super_block *);
1059
1060 /*
1061 * file.c
1062 */
1063 extern const struct address_space_operations afs_file_aops;
1064 extern const struct address_space_operations afs_symlink_aops;
1065 extern const struct inode_operations afs_file_inode_operations;
1066 extern const struct file_operations afs_file_operations;
1067 extern const struct netfs_request_ops afs_req_ops;
1068
1069 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
1070 extern void afs_put_wb_key(struct afs_wb_key *);
1071 extern int afs_open(struct inode *, struct file *);
1072 extern int afs_release(struct inode *, struct file *);
1073 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *);
1074 extern struct afs_read *afs_alloc_read(gfp_t);
1075 extern void afs_put_read(struct afs_read *);
1076 extern int afs_write_inode(struct inode *, struct writeback_control *);
1077
afs_get_read(struct afs_read * req)1078 static inline struct afs_read *afs_get_read(struct afs_read *req)
1079 {
1080 refcount_inc(&req->usage);
1081 return req;
1082 }
1083
1084 /*
1085 * flock.c
1086 */
1087 extern struct workqueue_struct *afs_lock_manager;
1088
1089 extern void afs_lock_op_done(struct afs_call *);
1090 extern void afs_lock_work(struct work_struct *);
1091 extern void afs_lock_may_be_available(struct afs_vnode *);
1092 extern int afs_lock(struct file *, int, struct file_lock *);
1093 extern int afs_flock(struct file *, int, struct file_lock *);
1094
1095 /*
1096 * fsclient.c
1097 */
1098 extern void afs_fs_fetch_status(struct afs_operation *);
1099 extern void afs_fs_fetch_data(struct afs_operation *);
1100 extern void afs_fs_create_file(struct afs_operation *);
1101 extern void afs_fs_make_dir(struct afs_operation *);
1102 extern void afs_fs_remove_file(struct afs_operation *);
1103 extern void afs_fs_remove_dir(struct afs_operation *);
1104 extern void afs_fs_link(struct afs_operation *);
1105 extern void afs_fs_symlink(struct afs_operation *);
1106 extern void afs_fs_rename(struct afs_operation *);
1107 extern void afs_fs_store_data(struct afs_operation *);
1108 extern void afs_fs_setattr(struct afs_operation *);
1109 extern void afs_fs_get_volume_status(struct afs_operation *);
1110 extern void afs_fs_set_lock(struct afs_operation *);
1111 extern void afs_fs_extend_lock(struct afs_operation *);
1112 extern void afs_fs_release_lock(struct afs_operation *);
1113 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
1114 struct afs_addr_cursor *, struct key *);
1115 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
1116 struct afs_addr_cursor *, struct key *);
1117 extern void afs_fs_inline_bulk_status(struct afs_operation *);
1118
1119 struct afs_acl {
1120 u32 size;
1121 u8 data[];
1122 };
1123
1124 extern void afs_fs_fetch_acl(struct afs_operation *);
1125 extern void afs_fs_store_acl(struct afs_operation *);
1126
1127 /*
1128 * fs_operation.c
1129 */
1130 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *);
1131 extern int afs_put_operation(struct afs_operation *);
1132 extern bool afs_begin_vnode_operation(struct afs_operation *);
1133 extern void afs_wait_for_operation(struct afs_operation *);
1134 extern int afs_do_sync_operation(struct afs_operation *);
1135
afs_op_nomem(struct afs_operation * op)1136 static inline void afs_op_nomem(struct afs_operation *op)
1137 {
1138 op->error = -ENOMEM;
1139 }
1140
afs_op_set_vnode(struct afs_operation * op,unsigned int n,struct afs_vnode * vnode)1141 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n,
1142 struct afs_vnode *vnode)
1143 {
1144 op->file[n].vnode = vnode;
1145 op->file[n].need_io_lock = true;
1146 }
1147
afs_op_set_fid(struct afs_operation * op,unsigned int n,const struct afs_fid * fid)1148 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n,
1149 const struct afs_fid *fid)
1150 {
1151 op->file[n].fid = *fid;
1152 }
1153
1154 /*
1155 * fs_probe.c
1156 */
1157 extern void afs_fileserver_probe_result(struct afs_call *);
1158 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
1159 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1160 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *);
1161 extern void afs_fs_probe_dispatcher(struct work_struct *);
1162 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool);
1163 extern void afs_fs_probe_cleanup(struct afs_net *);
1164
1165 /*
1166 * inode.c
1167 */
1168 extern const struct afs_operation_ops afs_fetch_status_operation;
1169
1170 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *);
1171 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
1172 extern int afs_ilookup5_test_by_fid(struct inode *, void *);
1173 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1174 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *);
1175 extern struct inode *afs_root_iget(struct super_block *, struct key *);
1176 extern bool afs_check_validity(struct afs_vnode *);
1177 extern int afs_validate(struct afs_vnode *, struct key *);
1178 bool afs_pagecache_valid(struct afs_vnode *);
1179 extern int afs_getattr(struct mnt_idmap *idmap, const struct path *,
1180 struct kstat *, u32, unsigned int);
1181 extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *);
1182 extern void afs_evict_inode(struct inode *);
1183 extern int afs_drop_inode(struct inode *);
1184
1185 /*
1186 * main.c
1187 */
1188 extern struct workqueue_struct *afs_wq;
1189 extern int afs_net_id;
1190
afs_net(struct net * net)1191 static inline struct afs_net *afs_net(struct net *net)
1192 {
1193 return net_generic(net, afs_net_id);
1194 }
1195
afs_sb2net(struct super_block * sb)1196 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1197 {
1198 return afs_net(AFS_FS_S(sb)->net_ns);
1199 }
1200
afs_d2net(struct dentry * dentry)1201 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1202 {
1203 return afs_sb2net(dentry->d_sb);
1204 }
1205
afs_i2net(struct inode * inode)1206 static inline struct afs_net *afs_i2net(struct inode *inode)
1207 {
1208 return afs_sb2net(inode->i_sb);
1209 }
1210
afs_v2net(struct afs_vnode * vnode)1211 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1212 {
1213 return afs_i2net(&vnode->netfs.inode);
1214 }
1215
afs_sock2net(struct sock * sk)1216 static inline struct afs_net *afs_sock2net(struct sock *sk)
1217 {
1218 return net_generic(sock_net(sk), afs_net_id);
1219 }
1220
__afs_stat(atomic_t * s)1221 static inline void __afs_stat(atomic_t *s)
1222 {
1223 atomic_inc(s);
1224 }
1225
1226 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1227
1228 /*
1229 * misc.c
1230 */
1231 extern int afs_abort_to_error(u32);
1232 extern void afs_prioritise_error(struct afs_error *, int, u32);
1233
1234 /*
1235 * mntpt.c
1236 */
1237 extern const struct inode_operations afs_mntpt_inode_operations;
1238 extern const struct inode_operations afs_autocell_inode_operations;
1239 extern const struct file_operations afs_mntpt_file_operations;
1240
1241 extern struct vfsmount *afs_d_automount(struct path *);
1242 extern void afs_mntpt_kill_timer(void);
1243
1244 /*
1245 * proc.c
1246 */
1247 #ifdef CONFIG_PROC_FS
1248 extern int __net_init afs_proc_init(struct afs_net *);
1249 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1250 extern int afs_proc_cell_setup(struct afs_cell *);
1251 extern void afs_proc_cell_remove(struct afs_cell *);
1252 extern void afs_put_sysnames(struct afs_sysnames *);
1253 #else
afs_proc_init(struct afs_net * net)1254 static inline int afs_proc_init(struct afs_net *net) { return 0; }
afs_proc_cleanup(struct afs_net * net)1255 static inline void afs_proc_cleanup(struct afs_net *net) {}
afs_proc_cell_setup(struct afs_cell * cell)1256 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
afs_proc_cell_remove(struct afs_cell * cell)1257 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
afs_put_sysnames(struct afs_sysnames * sysnames)1258 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1259 #endif
1260
1261 /*
1262 * rotate.c
1263 */
1264 extern bool afs_select_fileserver(struct afs_operation *);
1265 extern void afs_dump_edestaddrreq(const struct afs_operation *);
1266
1267 /*
1268 * rxrpc.c
1269 */
1270 extern struct workqueue_struct *afs_async_calls;
1271
1272 extern int __net_init afs_open_socket(struct afs_net *);
1273 extern void __net_exit afs_close_socket(struct afs_net *);
1274 extern void afs_charge_preallocation(struct work_struct *);
1275 extern void afs_put_call(struct afs_call *);
1276 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1277 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1278 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1279 const struct afs_call_type *,
1280 size_t, size_t);
1281 extern void afs_flat_call_destructor(struct afs_call *);
1282 extern void afs_send_empty_reply(struct afs_call *);
1283 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1284 extern int afs_extract_data(struct afs_call *, bool);
1285 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause);
1286
afs_make_op_call(struct afs_operation * op,struct afs_call * call,gfp_t gfp)1287 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call,
1288 gfp_t gfp)
1289 {
1290 op->call = call;
1291 op->type = call->type;
1292 call->op = op;
1293 call->key = op->key;
1294 call->intr = !(op->flags & AFS_OPERATION_UNINTR);
1295 afs_make_call(&op->ac, call, gfp);
1296 }
1297
afs_extract_begin(struct afs_call * call,void * buf,size_t size)1298 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1299 {
1300 call->iov_len = size;
1301 call->kvec[0].iov_base = buf;
1302 call->kvec[0].iov_len = size;
1303 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size);
1304 }
1305
afs_extract_to_tmp(struct afs_call * call)1306 static inline void afs_extract_to_tmp(struct afs_call *call)
1307 {
1308 call->iov_len = sizeof(call->tmp);
1309 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1310 }
1311
afs_extract_to_tmp64(struct afs_call * call)1312 static inline void afs_extract_to_tmp64(struct afs_call *call)
1313 {
1314 call->iov_len = sizeof(call->tmp64);
1315 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1316 }
1317
afs_extract_discard(struct afs_call * call,size_t size)1318 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1319 {
1320 call->iov_len = size;
1321 iov_iter_discard(&call->def_iter, ITER_DEST, size);
1322 }
1323
afs_extract_to_buf(struct afs_call * call,size_t size)1324 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1325 {
1326 call->iov_len = size;
1327 afs_extract_begin(call, call->buffer, size);
1328 }
1329
afs_transfer_reply(struct afs_call * call)1330 static inline int afs_transfer_reply(struct afs_call *call)
1331 {
1332 return afs_extract_data(call, false);
1333 }
1334
afs_check_call_state(struct afs_call * call,enum afs_call_state state)1335 static inline bool afs_check_call_state(struct afs_call *call,
1336 enum afs_call_state state)
1337 {
1338 return READ_ONCE(call->state) == state;
1339 }
1340
afs_set_call_state(struct afs_call * call,enum afs_call_state from,enum afs_call_state to)1341 static inline bool afs_set_call_state(struct afs_call *call,
1342 enum afs_call_state from,
1343 enum afs_call_state to)
1344 {
1345 bool ok = false;
1346
1347 spin_lock_bh(&call->state_lock);
1348 if (call->state == from) {
1349 call->state = to;
1350 trace_afs_call_state(call, from, to, 0, 0);
1351 ok = true;
1352 }
1353 spin_unlock_bh(&call->state_lock);
1354 return ok;
1355 }
1356
afs_set_call_complete(struct afs_call * call,int error,u32 remote_abort)1357 static inline void afs_set_call_complete(struct afs_call *call,
1358 int error, u32 remote_abort)
1359 {
1360 enum afs_call_state state;
1361 bool ok = false;
1362
1363 spin_lock_bh(&call->state_lock);
1364 state = call->state;
1365 if (state != AFS_CALL_COMPLETE) {
1366 call->abort_code = remote_abort;
1367 call->error = error;
1368 call->state = AFS_CALL_COMPLETE;
1369 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1370 error, remote_abort);
1371 ok = true;
1372 }
1373 spin_unlock_bh(&call->state_lock);
1374 if (ok) {
1375 trace_afs_call_done(call);
1376
1377 /* Asynchronous calls have two refs to release - one from the alloc and
1378 * one queued with the work item - and we can't just deallocate the
1379 * call because the work item may be queued again.
1380 */
1381 if (call->drop_ref)
1382 afs_put_call(call);
1383 }
1384 }
1385
1386 /*
1387 * security.c
1388 */
1389 extern void afs_put_permits(struct afs_permits *);
1390 extern void afs_clear_permits(struct afs_vnode *);
1391 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
1392 struct afs_status_cb *);
1393 extern struct key *afs_request_key(struct afs_cell *);
1394 extern struct key *afs_request_key_rcu(struct afs_cell *);
1395 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1396 extern int afs_permission(struct mnt_idmap *, struct inode *, int);
1397 extern void __exit afs_clean_up_permit_cache(void);
1398
1399 /*
1400 * server.c
1401 */
1402 extern spinlock_t afs_server_peer_lock;
1403
1404 extern struct afs_server *afs_find_server(struct afs_net *,
1405 const struct sockaddr_rxrpc *);
1406 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1407 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32);
1408 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
1409 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace);
1410 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1411 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace);
1412 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1413 extern void afs_manage_servers(struct work_struct *);
1414 extern void afs_servers_timer(struct timer_list *);
1415 extern void afs_fs_probe_timer(struct timer_list *);
1416 extern void __net_exit afs_purge_servers(struct afs_net *);
1417 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *);
1418
afs_inc_servers_outstanding(struct afs_net * net)1419 static inline void afs_inc_servers_outstanding(struct afs_net *net)
1420 {
1421 atomic_inc(&net->servers_outstanding);
1422 }
1423
afs_dec_servers_outstanding(struct afs_net * net)1424 static inline void afs_dec_servers_outstanding(struct afs_net *net)
1425 {
1426 if (atomic_dec_and_test(&net->servers_outstanding))
1427 wake_up_var(&net->servers_outstanding);
1428 }
1429
afs_is_probing_server(struct afs_server * server)1430 static inline bool afs_is_probing_server(struct afs_server *server)
1431 {
1432 return list_empty(&server->probe_link);
1433 }
1434
1435 /*
1436 * server_list.c
1437 */
afs_get_serverlist(struct afs_server_list * slist)1438 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1439 {
1440 refcount_inc(&slist->usage);
1441 return slist;
1442 }
1443
1444 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1445 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1446 struct afs_vldb_entry *,
1447 u8);
1448 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1449
1450 /*
1451 * super.c
1452 */
1453 extern int __init afs_fs_init(void);
1454 extern void afs_fs_exit(void);
1455
1456 /*
1457 * vlclient.c
1458 */
1459 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1460 const char *, int);
1461 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1462 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1463 struct key *, struct afs_vlserver *, unsigned int);
1464 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1465 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *);
1466
1467 /*
1468 * vl_alias.c
1469 */
1470 extern int afs_cell_detect_alias(struct afs_cell *, struct key *);
1471
1472 /*
1473 * vl_probe.c
1474 */
1475 extern void afs_vlserver_probe_result(struct afs_call *);
1476 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1477 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1478
1479 /*
1480 * vl_rotate.c
1481 */
1482 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1483 struct afs_cell *, struct key *);
1484 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1485 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1486 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1487
1488 /*
1489 * vlserver_list.c
1490 */
afs_get_vlserver(struct afs_vlserver * vlserver)1491 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1492 {
1493 refcount_inc(&vlserver->ref);
1494 return vlserver;
1495 }
1496
afs_get_vlserverlist(struct afs_vlserver_list * vllist)1497 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1498 {
1499 if (vllist)
1500 refcount_inc(&vllist->ref);
1501 return vllist;
1502 }
1503
1504 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1505 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1506 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1507 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1508 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1509 const void *, size_t);
1510
1511 /*
1512 * volume.c
1513 */
1514 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1515 extern int afs_activate_volume(struct afs_volume *);
1516 extern void afs_deactivate_volume(struct afs_volume *);
1517 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason);
1518 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace);
1519 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace);
1520 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *);
1521
1522 /*
1523 * write.c
1524 */
1525 #ifdef CONFIG_AFS_FSCACHE
1526 bool afs_dirty_folio(struct address_space *, struct folio *);
1527 #else
1528 #define afs_dirty_folio filemap_dirty_folio
1529 #endif
1530 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1531 loff_t pos, unsigned len,
1532 struct page **pagep, void **fsdata);
1533 extern int afs_write_end(struct file *file, struct address_space *mapping,
1534 loff_t pos, unsigned len, unsigned copied,
1535 struct page *page, void *fsdata);
1536 extern int afs_writepage(struct page *, struct writeback_control *);
1537 extern int afs_writepages(struct address_space *, struct writeback_control *);
1538 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1539 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1540 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1541 extern void afs_prune_wb_keys(struct afs_vnode *);
1542 int afs_launder_folio(struct folio *);
1543
1544 /*
1545 * xattr.c
1546 */
1547 extern const struct xattr_handler *afs_xattr_handlers[];
1548
1549 /*
1550 * yfsclient.c
1551 */
1552 extern void yfs_fs_fetch_data(struct afs_operation *);
1553 extern void yfs_fs_create_file(struct afs_operation *);
1554 extern void yfs_fs_make_dir(struct afs_operation *);
1555 extern void yfs_fs_remove_file2(struct afs_operation *);
1556 extern void yfs_fs_remove_file(struct afs_operation *);
1557 extern void yfs_fs_remove_dir(struct afs_operation *);
1558 extern void yfs_fs_link(struct afs_operation *);
1559 extern void yfs_fs_symlink(struct afs_operation *);
1560 extern void yfs_fs_rename(struct afs_operation *);
1561 extern void yfs_fs_store_data(struct afs_operation *);
1562 extern void yfs_fs_setattr(struct afs_operation *);
1563 extern void yfs_fs_get_volume_status(struct afs_operation *);
1564 extern void yfs_fs_set_lock(struct afs_operation *);
1565 extern void yfs_fs_extend_lock(struct afs_operation *);
1566 extern void yfs_fs_release_lock(struct afs_operation *);
1567 extern void yfs_fs_fetch_status(struct afs_operation *);
1568 extern void yfs_fs_inline_bulk_status(struct afs_operation *);
1569
1570 struct yfs_acl {
1571 struct afs_acl *acl; /* Dir/file/symlink ACL */
1572 struct afs_acl *vol_acl; /* Whole volume ACL */
1573 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1574 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1575 unsigned int flags;
1576 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1577 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1578 };
1579
1580 extern void yfs_free_opaque_acl(struct yfs_acl *);
1581 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *);
1582 extern void yfs_fs_store_opaque_acl2(struct afs_operation *);
1583
1584 /*
1585 * Miscellaneous inline functions.
1586 */
AFS_FS_I(struct inode * inode)1587 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1588 {
1589 return container_of(inode, struct afs_vnode, netfs.inode);
1590 }
1591
AFS_VNODE_TO_I(struct afs_vnode * vnode)1592 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1593 {
1594 return &vnode->netfs.inode;
1595 }
1596
1597 /*
1598 * Note that a dentry got changed. We need to set d_fsdata to the data version
1599 * number derived from the result of the operation. It doesn't matter if
1600 * d_fsdata goes backwards as we'll just revalidate.
1601 */
afs_update_dentry_version(struct afs_operation * op,struct afs_vnode_param * dir_vp,struct dentry * dentry)1602 static inline void afs_update_dentry_version(struct afs_operation *op,
1603 struct afs_vnode_param *dir_vp,
1604 struct dentry *dentry)
1605 {
1606 if (!op->error)
1607 dentry->d_fsdata =
1608 (void *)(unsigned long)dir_vp->scb.status.data_version;
1609 }
1610
1611 /*
1612 * Set the file size and block count. Estimate the number of 512 bytes blocks
1613 * used, rounded up to nearest 1K for consistency with other AFS clients.
1614 */
afs_set_i_size(struct afs_vnode * vnode,u64 size)1615 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size)
1616 {
1617 i_size_write(&vnode->netfs.inode, size);
1618 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1;
1619 }
1620
1621 /*
1622 * Check for a conflicting operation on a directory that we just unlinked from.
1623 * If someone managed to sneak a link or an unlink in on the file we just
1624 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS).
1625 */
afs_check_dir_conflict(struct afs_operation * op,struct afs_vnode_param * dvp)1626 static inline void afs_check_dir_conflict(struct afs_operation *op,
1627 struct afs_vnode_param *dvp)
1628 {
1629 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version)
1630 op->flags |= AFS_OPERATION_DIR_CONFLICT;
1631 }
1632
afs_io_error(struct afs_call * call,enum afs_io_error where)1633 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1634 {
1635 trace_afs_io_error(call->debug_id, -EIO, where);
1636 return -EIO;
1637 }
1638
afs_bad(struct afs_vnode * vnode,enum afs_file_error where)1639 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1640 {
1641 trace_afs_file_error(vnode, -EIO, where);
1642 return -EIO;
1643 }
1644
1645 /*****************************************************************************/
1646 /*
1647 * debug tracing
1648 */
1649 extern unsigned afs_debug;
1650
1651 #define dbgprintk(FMT,...) \
1652 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1653
1654 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1655 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1656 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1657
1658
1659 #if defined(__KDEBUG)
1660 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1661 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1662 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1663
1664 #elif defined(CONFIG_AFS_DEBUG)
1665 #define AFS_DEBUG_KENTER 0x01
1666 #define AFS_DEBUG_KLEAVE 0x02
1667 #define AFS_DEBUG_KDEBUG 0x04
1668
1669 #define _enter(FMT,...) \
1670 do { \
1671 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1672 kenter(FMT,##__VA_ARGS__); \
1673 } while (0)
1674
1675 #define _leave(FMT,...) \
1676 do { \
1677 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1678 kleave(FMT,##__VA_ARGS__); \
1679 } while (0)
1680
1681 #define _debug(FMT,...) \
1682 do { \
1683 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1684 kdebug(FMT,##__VA_ARGS__); \
1685 } while (0)
1686
1687 #else
1688 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1689 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1690 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1691 #endif
1692
1693 /*
1694 * debug assertion checking
1695 */
1696 #if 1 // defined(__KDEBUGALL)
1697
1698 #define ASSERT(X) \
1699 do { \
1700 if (unlikely(!(X))) { \
1701 printk(KERN_ERR "\n"); \
1702 printk(KERN_ERR "AFS: Assertion failed\n"); \
1703 BUG(); \
1704 } \
1705 } while(0)
1706
1707 #define ASSERTCMP(X, OP, Y) \
1708 do { \
1709 if (unlikely(!((X) OP (Y)))) { \
1710 printk(KERN_ERR "\n"); \
1711 printk(KERN_ERR "AFS: Assertion failed\n"); \
1712 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1713 (unsigned long)(X), (unsigned long)(Y)); \
1714 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1715 (unsigned long)(X), (unsigned long)(Y)); \
1716 BUG(); \
1717 } \
1718 } while(0)
1719
1720 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1721 do { \
1722 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1723 printk(KERN_ERR "\n"); \
1724 printk(KERN_ERR "AFS: Assertion failed\n"); \
1725 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1726 (unsigned long)(L), (unsigned long)(N), \
1727 (unsigned long)(H)); \
1728 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1729 (unsigned long)(L), (unsigned long)(N), \
1730 (unsigned long)(H)); \
1731 BUG(); \
1732 } \
1733 } while(0)
1734
1735 #define ASSERTIF(C, X) \
1736 do { \
1737 if (unlikely((C) && !(X))) { \
1738 printk(KERN_ERR "\n"); \
1739 printk(KERN_ERR "AFS: Assertion failed\n"); \
1740 BUG(); \
1741 } \
1742 } while(0)
1743
1744 #define ASSERTIFCMP(C, X, OP, Y) \
1745 do { \
1746 if (unlikely((C) && !((X) OP (Y)))) { \
1747 printk(KERN_ERR "\n"); \
1748 printk(KERN_ERR "AFS: Assertion failed\n"); \
1749 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1750 (unsigned long)(X), (unsigned long)(Y)); \
1751 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1752 (unsigned long)(X), (unsigned long)(Y)); \
1753 BUG(); \
1754 } \
1755 } while(0)
1756
1757 #else
1758
1759 #define ASSERT(X) \
1760 do { \
1761 } while(0)
1762
1763 #define ASSERTCMP(X, OP, Y) \
1764 do { \
1765 } while(0)
1766
1767 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1768 do { \
1769 } while(0)
1770
1771 #define ASSERTIF(C, X) \
1772 do { \
1773 } while(0)
1774
1775 #define ASSERTIFCMP(C, X, OP, Y) \
1776 do { \
1777 } while(0)
1778
1779 #endif /* __KDEBUGALL */
1780