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