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12#include <linux/compiler.h>
13#include <linux/kernel.h>
14#include <linux/ktime.h>
15#include <linux/fs.h>
16#include <linux/pagemap.h>
17#include <linux/rxrpc.h>
18#include <linux/key.h>
19#include <linux/workqueue.h>
20#include <linux/sched.h>
21#include <linux/fscache.h>
22#include <linux/backing-dev.h>
23#include <linux/uuid.h>
24#include <net/net_namespace.h>
25#include <net/af_rxrpc.h>
26
27#include "afs.h"
28#include "afs_vl.h"
29
30#define AFS_CELL_MAX_ADDRS 15
31
32struct pagevec;
33struct afs_call;
34
35struct afs_mount_params {
36 bool rwpath;
37 bool force;
38 bool autocell;
39 bool dyn_root;
40 afs_voltype_t type;
41 int volnamesz;
42 const char *volname;
43 struct afs_net *net;
44 struct afs_cell *cell;
45 struct afs_volume *volume;
46 struct key *key;
47};
48
49struct afs_iget_data {
50 struct afs_fid fid;
51 struct afs_volume *volume;
52};
53
54enum afs_call_state {
55 AFS_CALL_CL_REQUESTING,
56 AFS_CALL_CL_AWAIT_REPLY,
57 AFS_CALL_CL_PROC_REPLY,
58 AFS_CALL_SV_AWAIT_OP_ID,
59 AFS_CALL_SV_AWAIT_REQUEST,
60 AFS_CALL_SV_REPLYING,
61 AFS_CALL_SV_AWAIT_ACK,
62 AFS_CALL_COMPLETE,
63};
64
65
66
67
68struct afs_addr_list {
69 struct rcu_head rcu;
70 refcount_t usage;
71 u32 version;
72 unsigned short nr_addrs;
73 unsigned short index;
74 unsigned short nr_ipv4;
75 unsigned long probed;
76 unsigned long yfs;
77 struct sockaddr_rxrpc addrs[];
78};
79
80
81
82
83struct afs_call {
84 const struct afs_call_type *type;
85 wait_queue_head_t waitq;
86 struct work_struct async_work;
87 struct work_struct work;
88 struct rxrpc_call *rxcall;
89 struct key *key;
90 struct afs_net *net;
91 struct afs_server *cm_server;
92 struct afs_cb_interest *cbi;
93 void *request;
94 struct address_space *mapping;
95 void *buffer;
96 void *reply[4];
97 pgoff_t first;
98 pgoff_t last;
99 size_t offset;
100 atomic_t usage;
101 enum afs_call_state state;
102 spinlock_t state_lock;
103 int error;
104 u32 abort_code;
105 unsigned request_size;
106 unsigned reply_max;
107 unsigned first_offset;
108 unsigned int cb_break;
109 union {
110 unsigned last_to;
111 unsigned count2;
112 };
113 unsigned char unmarshall;
114 bool incoming;
115 bool send_pages;
116 bool need_attention;
117 bool async;
118 bool ret_reply0;
119 bool upgrade;
120 u16 service_id;
121 unsigned int debug_id;
122 u32 operation_ID;
123 u32 count;
124 __be32 tmp;
125 afs_dataversion_t expected_version;
126 afs_dataversion_t expected_version_2;
127};
128
129struct afs_call_type {
130 const char *name;
131 unsigned int op;
132
133
134
135
136 int (*deliver)(struct afs_call *call);
137
138
139 void (*destructor)(struct afs_call *call);
140
141
142 void (*work)(struct work_struct *work);
143};
144
145
146
147
148struct afs_wb_key {
149 refcount_t usage;
150 struct key *key;
151 struct list_head vnode_link;
152};
153
154
155
156
157struct afs_file {
158 struct key *key;
159 struct afs_wb_key *wb;
160};
161
162static inline struct key *afs_file_key(struct file *file)
163{
164 struct afs_file *af = file->private_data;
165
166 return af->key;
167}
168
169
170
171
172struct afs_read {
173 loff_t pos;
174 loff_t len;
175 loff_t actual_len;
176 loff_t remain;
177 loff_t file_size;
178 afs_dataversion_t data_version;
179 refcount_t usage;
180 unsigned int index;
181 unsigned int nr_pages;
182 void (*page_done)(struct afs_call *, struct afs_read *);
183 struct page **pages;
184 struct page *array[];
185};
186
187
188
189
190
191struct afs_super_info {
192 struct afs_net *net;
193 struct afs_cell *cell;
194 struct afs_volume *volume;
195 bool dyn_root;
196};
197
198static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
199{
200 return sb->s_fs_info;
201}
202
203extern struct file_system_type afs_fs_type;
204
205
206
207
208struct afs_sysnames {
209#define AFS_NR_SYSNAME 16
210 char *subs[AFS_NR_SYSNAME];
211 refcount_t usage;
212 unsigned short nr;
213 short error;
214 char blank[1];
215};
216
217
218
219
220struct afs_net {
221 struct afs_uuid uuid;
222 bool live;
223
224
225 struct socket *socket;
226 struct afs_call *spare_incoming_call;
227 struct work_struct charge_preallocation_work;
228 struct mutex socket_mutex;
229 atomic_t nr_outstanding_calls;
230 atomic_t nr_superblocks;
231
232
233 struct rb_root cells;
234 struct afs_cell *ws_cell;
235 struct work_struct cells_manager;
236 struct timer_list cells_timer;
237 atomic_t cells_outstanding;
238 seqlock_t cells_lock;
239
240 spinlock_t proc_cells_lock;
241 struct list_head proc_cells;
242
243
244
245
246
247 seqlock_t fs_lock;
248 struct rb_root fs_servers;
249 struct list_head fs_updates;
250 struct hlist_head fs_proc;
251
252 struct hlist_head fs_addresses4;
253 struct hlist_head fs_addresses6;
254 seqlock_t fs_addr_lock;
255
256 struct work_struct fs_manager;
257 struct timer_list fs_timer;
258 atomic_t servers_outstanding;
259
260
261 struct mutex lock_manager_mutex;
262
263
264 struct proc_dir_entry *proc_afs;
265 struct afs_sysnames *sysnames;
266 rwlock_t sysnames_lock;
267
268
269 atomic_t n_lookup;
270 atomic_t n_reval;
271 atomic_t n_inval;
272 atomic_t n_relpg;
273 atomic_t n_read_dir;
274 atomic_t n_dir_cr;
275 atomic_t n_dir_rm;
276 atomic_t n_stores;
277 atomic_long_t n_store_bytes;
278 atomic_long_t n_fetch_bytes;
279 atomic_t n_fetches;
280};
281
282extern const char afs_init_sysname[];
283extern struct afs_net __afs_net;
284
285enum afs_cell_state {
286 AFS_CELL_UNSET,
287 AFS_CELL_ACTIVATING,
288 AFS_CELL_ACTIVE,
289 AFS_CELL_DEACTIVATING,
290 AFS_CELL_INACTIVE,
291 AFS_CELL_FAILED,
292};
293
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310
311struct afs_cell {
312 union {
313 struct rcu_head rcu;
314 struct rb_node net_node;
315 };
316 struct afs_net *net;
317 struct key *anonymous_key;
318 struct work_struct manager;
319 struct list_head proc_link;
320#ifdef CONFIG_AFS_FSCACHE
321 struct fscache_cookie *cache;
322#endif
323 time64_t dns_expiry;
324 time64_t last_inactive;
325 atomic_t usage;
326 unsigned long flags;
327#define AFS_CELL_FL_NOT_READY 0
328#define AFS_CELL_FL_NO_GC 1
329#define AFS_CELL_FL_NOT_FOUND 2
330#define AFS_CELL_FL_DNS_FAIL 3
331#define AFS_CELL_FL_NO_LOOKUP_YET 4
332 enum afs_cell_state state;
333 short error;
334
335
336 struct list_head proc_volumes;
337 rwlock_t proc_lock;
338
339
340 rwlock_t vl_addrs_lock;
341 struct afs_addr_list __rcu *vl_addrs;
342 u8 name_len;
343 char name[64 + 1];
344};
345
346
347
348
349
350
351struct afs_vldb_entry {
352 afs_volid_t vid[3];
353
354 unsigned long flags;
355#define AFS_VLDB_HAS_RW 0
356#define AFS_VLDB_HAS_RO 1
357#define AFS_VLDB_HAS_BAK 2
358#define AFS_VLDB_QUERY_VALID 3
359#define AFS_VLDB_QUERY_ERROR 4
360
361 uuid_t fs_server[AFS_NMAXNSERVERS];
362 u8 fs_mask[AFS_NMAXNSERVERS];
363#define AFS_VOL_VTM_RW 0x01
364#define AFS_VOL_VTM_RO 0x02
365#define AFS_VOL_VTM_BAK 0x04
366 short error;
367 u8 nr_servers;
368 u8 name_len;
369 u8 name[AFS_MAXVOLNAME + 1];
370};
371
372
373
374
375struct afs_server {
376 struct rcu_head rcu;
377 union {
378 uuid_t uuid;
379 struct afs_uuid _uuid;
380 };
381
382 struct afs_addr_list __rcu *addresses;
383 struct rb_node uuid_rb;
384 struct hlist_node addr4_link;
385 struct hlist_node addr6_link;
386 struct hlist_node proc_link;
387 struct afs_server *gc_next;
388 time64_t put_time;
389 time64_t update_at;
390 unsigned long flags;
391#define AFS_SERVER_FL_NEW 0
392#define AFS_SERVER_FL_NOT_READY 1
393#define AFS_SERVER_FL_NOT_FOUND 2
394#define AFS_SERVER_FL_VL_FAIL 3
395#define AFS_SERVER_FL_UPDATING 4
396#define AFS_SERVER_FL_PROBED 5
397#define AFS_SERVER_FL_PROBING 6
398#define AFS_SERVER_FL_NO_IBULK 7
399#define AFS_SERVER_FL_MAY_HAVE_CB 8
400 atomic_t usage;
401 u32 addr_version;
402
403
404 rwlock_t fs_lock;
405
406
407 struct list_head cb_interests;
408 unsigned cb_s_break;
409 rwlock_t cb_break_lock;
410};
411
412
413
414
415struct afs_cb_interest {
416 struct list_head cb_link;
417 struct afs_server *server;
418 struct super_block *sb;
419 afs_volid_t vid;
420 refcount_t usage;
421};
422
423
424
425
426struct afs_server_entry {
427 struct afs_server *server;
428 struct afs_cb_interest *cb_interest;
429};
430
431struct afs_server_list {
432 refcount_t usage;
433 unsigned short nr_servers;
434 unsigned short index;
435 unsigned short vnovol_mask;
436 unsigned int seq;
437 rwlock_t lock;
438 struct afs_server_entry servers[];
439};
440
441
442
443
444struct afs_volume {
445 afs_volid_t vid;
446 atomic_t usage;
447 time64_t update_at;
448 struct afs_cell *cell;
449 struct list_head proc_link;
450 unsigned long flags;
451#define AFS_VOLUME_NEEDS_UPDATE 0
452#define AFS_VOLUME_UPDATING 1
453#define AFS_VOLUME_WAIT 2
454#define AFS_VOLUME_DELETED 3
455#define AFS_VOLUME_OFFLINE 4
456#define AFS_VOLUME_BUSY 5
457#ifdef CONFIG_AFS_FSCACHE
458 struct fscache_cookie *cache;
459#endif
460 struct afs_server_list *servers;
461 rwlock_t servers_lock;
462 unsigned int servers_seq;
463
464 unsigned cb_v_break;
465 rwlock_t cb_break_lock;
466
467 afs_voltype_t type;
468 short error;
469 char type_force;
470 u8 name_len;
471 u8 name[AFS_MAXVOLNAME + 1];
472};
473
474enum afs_lock_state {
475 AFS_VNODE_LOCK_NONE,
476 AFS_VNODE_LOCK_WAITING_FOR_CB,
477 AFS_VNODE_LOCK_SETTING,
478 AFS_VNODE_LOCK_GRANTED,
479 AFS_VNODE_LOCK_EXTENDING,
480 AFS_VNODE_LOCK_NEED_UNLOCK,
481 AFS_VNODE_LOCK_UNLOCKING,
482};
483
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488
489
490struct afs_vnode {
491 struct inode vfs_inode;
492
493 struct afs_volume *volume;
494 struct afs_fid fid;
495 struct afs_file_status status;
496 afs_dataversion_t invalid_before;
497#ifdef CONFIG_AFS_FSCACHE
498 struct fscache_cookie *cache;
499#endif
500 struct afs_permits __rcu *permit_cache;
501 struct mutex io_lock;
502 struct rw_semaphore validate_lock;
503 spinlock_t wb_lock;
504 spinlock_t lock;
505 unsigned long flags;
506#define AFS_VNODE_CB_PROMISED 0
507#define AFS_VNODE_UNSET 1
508#define AFS_VNODE_DIR_VALID 2
509#define AFS_VNODE_ZAP_DATA 3
510#define AFS_VNODE_DELETED 4
511#define AFS_VNODE_MOUNTPOINT 5
512#define AFS_VNODE_AUTOCELL 6
513#define AFS_VNODE_PSEUDODIR 7
514#define AFS_VNODE_NEW_CONTENT 8
515
516 struct list_head wb_keys;
517 struct list_head pending_locks;
518 struct list_head granted_locks;
519 struct delayed_work lock_work;
520 struct key *lock_key;
521 enum afs_lock_state lock_state : 8;
522 afs_lock_type_t lock_type : 8;
523
524
525 struct afs_cb_interest *cb_interest;
526 unsigned int cb_s_break;
527 unsigned int cb_v_break;
528 unsigned int cb_break;
529 seqlock_t cb_lock;
530
531 time64_t cb_expires_at;
532 unsigned cb_version;
533 afs_callback_type_t cb_type;
534};
535
536
537
538
539struct afs_permit {
540 struct key *key;
541 afs_access_t access;
542};
543
544
545
546
547
548struct afs_permits {
549 struct rcu_head rcu;
550 struct hlist_node hash_node;
551 unsigned long h;
552 refcount_t usage;
553 unsigned short nr_permits;
554 bool invalidated;
555 struct afs_permit permits[];
556};
557
558
559
560
561struct afs_interface {
562 struct in_addr address;
563 struct in_addr netmask;
564 unsigned mtu;
565};
566
567
568
569
570struct afs_addr_cursor {
571 struct afs_addr_list *alist;
572 struct sockaddr_rxrpc *addr;
573 u32 abort_code;
574 unsigned short start;
575 unsigned short index;
576 short error;
577 bool begun;
578 bool responded;
579};
580
581
582
583
584struct afs_fs_cursor {
585 struct afs_addr_cursor ac;
586 struct afs_vnode *vnode;
587 struct afs_server_list *server_list;
588 struct afs_cb_interest *cbi;
589 struct key *key;
590 unsigned int cb_break;
591 unsigned int cb_break_2;
592 unsigned char start;
593 unsigned char index;
594 unsigned short flags;
595#define AFS_FS_CURSOR_STOP 0x0001
596#define AFS_FS_CURSOR_VBUSY 0x0002
597#define AFS_FS_CURSOR_VMOVED 0x0004
598#define AFS_FS_CURSOR_VNOVOL 0x0008
599#define AFS_FS_CURSOR_CUR_ONLY 0x0010
600#define AFS_FS_CURSOR_NO_VSLEEP 0x0020
601};
602
603
604
605
606struct afs_vnode_cache_aux {
607 u64 data_version;
608} __packed;
609
610#include <trace/events/afs.h>
611
612
613
614
615
616static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
617{
618 if (alist)
619 refcount_inc(&alist->usage);
620 return alist;
621}
622extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
623 unsigned short,
624 unsigned short);
625extern void afs_put_addrlist(struct afs_addr_list *);
626extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char,
627 unsigned short, unsigned short);
628extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *);
629extern bool afs_iterate_addresses(struct afs_addr_cursor *);
630extern int afs_end_cursor(struct afs_addr_cursor *);
631extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *);
632
633extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
634extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
635
636
637
638
639#ifdef CONFIG_AFS_FSCACHE
640extern struct fscache_netfs afs_cache_netfs;
641extern struct fscache_cookie_def afs_cell_cache_index_def;
642extern struct fscache_cookie_def afs_volume_cache_index_def;
643extern struct fscache_cookie_def afs_vnode_cache_index_def;
644#else
645#define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
646#define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
647#define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
648#endif
649
650
651
652
653extern void afs_init_callback_state(struct afs_server *);
654extern void afs_break_callback(struct afs_vnode *);
655extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*);
656
657extern int afs_register_server_cb_interest(struct afs_vnode *,
658 struct afs_server_list *, unsigned int);
659extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *);
660extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *);
661
662static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi)
663{
664 if (cbi)
665 refcount_inc(&cbi->usage);
666 return cbi;
667}
668
669static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
670{
671 return vnode->cb_break + vnode->cb_s_break + vnode->cb_v_break;
672}
673
674static inline unsigned int afs_cb_break_sum(struct afs_vnode *vnode,
675 struct afs_cb_interest *cbi)
676{
677 return vnode->cb_break + cbi->server->cb_s_break + vnode->volume->cb_v_break;
678}
679
680
681
682
683extern int afs_cell_init(struct afs_net *, const char *);
684extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned);
685extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
686 const char *, bool);
687extern struct afs_cell *afs_get_cell(struct afs_cell *);
688extern void afs_put_cell(struct afs_net *, struct afs_cell *);
689extern void afs_manage_cells(struct work_struct *);
690extern void afs_cells_timer(struct timer_list *);
691extern void __net_exit afs_cell_purge(struct afs_net *);
692
693
694
695
696extern bool afs_cm_incoming_call(struct afs_call *);
697
698
699
700
701extern const struct file_operations afs_dir_file_operations;
702extern const struct inode_operations afs_dir_inode_operations;
703extern const struct address_space_operations afs_dir_aops;
704extern const struct dentry_operations afs_fs_dentry_operations;
705
706extern void afs_d_release(struct dentry *);
707
708
709
710
711extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
712 enum afs_edit_dir_reason);
713extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
714
715
716
717
718extern const struct file_operations afs_dynroot_file_operations;
719extern const struct inode_operations afs_dynroot_inode_operations;
720extern const struct dentry_operations afs_dynroot_dentry_operations;
721
722extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
723
724
725
726
727extern const struct address_space_operations afs_fs_aops;
728extern const struct inode_operations afs_file_inode_operations;
729extern const struct file_operations afs_file_operations;
730
731extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
732extern void afs_put_wb_key(struct afs_wb_key *);
733extern int afs_open(struct inode *, struct file *);
734extern int afs_release(struct inode *, struct file *);
735extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
736extern int afs_page_filler(void *, struct page *);
737extern void afs_put_read(struct afs_read *);
738
739
740
741
742extern struct workqueue_struct *afs_lock_manager;
743
744extern void afs_lock_work(struct work_struct *);
745extern void afs_lock_may_be_available(struct afs_vnode *);
746extern int afs_lock(struct file *, int, struct file_lock *);
747extern int afs_flock(struct file *, int, struct file_lock *);
748
749
750
751
752#define AFS_VNODE_NOT_YET_SET 0x01
753#define AFS_VNODE_META_CHANGED 0x02
754#define AFS_VNODE_DATA_CHANGED 0x04
755extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *,
756 const afs_dataversion_t *, u8);
757
758extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
759extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
760extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
761extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64,
762 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
763extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool, u64);
764extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
765extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
766 struct afs_fid *, struct afs_file_status *);
767extern int afs_fs_rename(struct afs_fs_cursor *, const char *,
768 struct afs_vnode *, const char *, u64, u64);
769extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
770 pgoff_t, pgoff_t, unsigned, unsigned);
771extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
772extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
773extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
774extern int afs_fs_extend_lock(struct afs_fs_cursor *);
775extern int afs_fs_release_lock(struct afs_fs_cursor *);
776extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
777 struct afs_addr_cursor *, struct key *);
778extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
779 struct afs_addr_cursor *, struct key *);
780extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
781 struct afs_fid *, struct afs_file_status *,
782 struct afs_callback *, unsigned int,
783 struct afs_volsync *);
784extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
785 struct afs_fid *, struct afs_file_status *,
786 struct afs_callback *, struct afs_volsync *);
787
788
789
790
791extern int afs_fetch_status(struct afs_vnode *, struct key *, bool);
792extern int afs_iget5_test(struct inode *, void *);
793extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
794extern struct inode *afs_iget(struct super_block *, struct key *,
795 struct afs_fid *, struct afs_file_status *,
796 struct afs_callback *,
797 struct afs_cb_interest *);
798extern void afs_zap_data(struct afs_vnode *);
799extern int afs_validate(struct afs_vnode *, struct key *);
800extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
801extern int afs_setattr(struct dentry *, struct iattr *);
802extern void afs_evict_inode(struct inode *);
803extern int afs_drop_inode(struct inode *);
804
805
806
807
808extern struct workqueue_struct *afs_wq;
809
810static inline struct afs_net *afs_d2net(struct dentry *dentry)
811{
812 return &__afs_net;
813}
814
815static inline struct afs_net *afs_i2net(struct inode *inode)
816{
817 return &__afs_net;
818}
819
820static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
821{
822 return &__afs_net;
823}
824
825static inline struct afs_net *afs_sock2net(struct sock *sk)
826{
827 return &__afs_net;
828}
829
830static inline struct afs_net *afs_get_net(struct afs_net *net)
831{
832 return net;
833}
834
835static inline void afs_put_net(struct afs_net *net)
836{
837}
838
839static inline void __afs_stat(atomic_t *s)
840{
841 atomic_inc(s);
842}
843
844#define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
845
846
847
848
849extern int afs_abort_to_error(u32);
850
851
852
853
854extern const struct inode_operations afs_mntpt_inode_operations;
855extern const struct inode_operations afs_autocell_inode_operations;
856extern const struct file_operations afs_mntpt_file_operations;
857
858extern struct vfsmount *afs_d_automount(struct path *);
859extern void afs_mntpt_kill_timer(void);
860
861
862
863
864extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
865
866
867
868
869extern int __net_init afs_proc_init(struct afs_net *);
870extern void __net_exit afs_proc_cleanup(struct afs_net *);
871extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *);
872extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *);
873extern void afs_put_sysnames(struct afs_sysnames *);
874
875
876
877
878extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *,
879 struct key *);
880extern bool afs_select_fileserver(struct afs_fs_cursor *);
881extern bool afs_select_current_fileserver(struct afs_fs_cursor *);
882extern int afs_end_vnode_operation(struct afs_fs_cursor *);
883
884
885
886
887extern struct workqueue_struct *afs_async_calls;
888
889extern int __net_init afs_open_socket(struct afs_net *);
890extern void __net_exit afs_close_socket(struct afs_net *);
891extern void afs_charge_preallocation(struct work_struct *);
892extern void afs_put_call(struct afs_call *);
893extern int afs_queue_call_work(struct afs_call *);
894extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool);
895extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
896 const struct afs_call_type *,
897 size_t, size_t);
898extern void afs_flat_call_destructor(struct afs_call *);
899extern void afs_send_empty_reply(struct afs_call *);
900extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
901extern int afs_extract_data(struct afs_call *, void *, size_t, bool);
902extern int afs_protocol_error(struct afs_call *, int);
903
904static inline int afs_transfer_reply(struct afs_call *call)
905{
906 return afs_extract_data(call, call->buffer, call->reply_max, false);
907}
908
909static inline bool afs_check_call_state(struct afs_call *call,
910 enum afs_call_state state)
911{
912 return READ_ONCE(call->state) == state;
913}
914
915static inline bool afs_set_call_state(struct afs_call *call,
916 enum afs_call_state from,
917 enum afs_call_state to)
918{
919 bool ok = false;
920
921 spin_lock_bh(&call->state_lock);
922 if (call->state == from) {
923 call->state = to;
924 trace_afs_call_state(call, from, to, 0, 0);
925 ok = true;
926 }
927 spin_unlock_bh(&call->state_lock);
928 return ok;
929}
930
931static inline void afs_set_call_complete(struct afs_call *call,
932 int error, u32 remote_abort)
933{
934 enum afs_call_state state;
935 bool ok = false;
936
937 spin_lock_bh(&call->state_lock);
938 state = call->state;
939 if (state != AFS_CALL_COMPLETE) {
940 call->abort_code = remote_abort;
941 call->error = error;
942 call->state = AFS_CALL_COMPLETE;
943 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
944 error, remote_abort);
945 ok = true;
946 }
947 spin_unlock_bh(&call->state_lock);
948 if (ok)
949 trace_afs_call_done(call);
950}
951
952
953
954
955extern void afs_put_permits(struct afs_permits *);
956extern void afs_clear_permits(struct afs_vnode *);
957extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int);
958extern void afs_zap_permits(struct rcu_head *);
959extern struct key *afs_request_key(struct afs_cell *);
960extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
961extern int afs_permission(struct inode *, int);
962extern void __exit afs_clean_up_permit_cache(void);
963
964
965
966
967extern spinlock_t afs_server_peer_lock;
968
969static inline struct afs_server *afs_get_server(struct afs_server *server)
970{
971 atomic_inc(&server->usage);
972 return server;
973}
974
975extern struct afs_server *afs_find_server(struct afs_net *,
976 const struct sockaddr_rxrpc *);
977extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
978extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *);
979extern void afs_put_server(struct afs_net *, struct afs_server *);
980extern void afs_manage_servers(struct work_struct *);
981extern void afs_servers_timer(struct timer_list *);
982extern void __net_exit afs_purge_servers(struct afs_net *);
983extern bool afs_probe_fileserver(struct afs_fs_cursor *);
984extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *);
985
986
987
988
989static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
990{
991 refcount_inc(&slist->usage);
992 return slist;
993}
994
995extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
996extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
997 struct afs_vldb_entry *,
998 u8);
999extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1000
1001
1002
1003
1004extern int __init afs_fs_init(void);
1005extern void __exit afs_fs_exit(void);
1006
1007
1008
1009
1010extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *,
1011 struct afs_addr_cursor *,
1012 struct key *, const char *, int);
1013extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *,
1014 struct key *, const uuid_t *);
1015extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *);
1016extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *,
1017 struct key *, const uuid_t *);
1018
1019
1020
1021
1022static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume)
1023{
1024 if (volume)
1025 atomic_inc(&volume->usage);
1026 return volume;
1027}
1028
1029extern struct afs_volume *afs_create_volume(struct afs_mount_params *);
1030extern void afs_activate_volume(struct afs_volume *);
1031extern void afs_deactivate_volume(struct afs_volume *);
1032extern void afs_put_volume(struct afs_cell *, struct afs_volume *);
1033extern int afs_check_volume_status(struct afs_volume *, struct key *);
1034
1035
1036
1037
1038extern int afs_set_page_dirty(struct page *);
1039extern int afs_write_begin(struct file *file, struct address_space *mapping,
1040 loff_t pos, unsigned len, unsigned flags,
1041 struct page **pagep, void **fsdata);
1042extern int afs_write_end(struct file *file, struct address_space *mapping,
1043 loff_t pos, unsigned len, unsigned copied,
1044 struct page *page, void *fsdata);
1045extern int afs_writepage(struct page *, struct writeback_control *);
1046extern int afs_writepages(struct address_space *, struct writeback_control *);
1047extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
1048extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1049extern int afs_fsync(struct file *, loff_t, loff_t, int);
1050extern int afs_page_mkwrite(struct vm_fault *);
1051extern void afs_prune_wb_keys(struct afs_vnode *);
1052extern int afs_launder_page(struct page *);
1053
1054
1055
1056
1057extern const struct xattr_handler *afs_xattr_handlers[];
1058extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1059
1060
1061
1062
1063
1064static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1065{
1066 return container_of(inode, struct afs_vnode, vfs_inode);
1067}
1068
1069static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1070{
1071 return &vnode->vfs_inode;
1072}
1073
1074static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc,
1075 struct afs_vnode *vnode,
1076 unsigned int cb_break)
1077{
1078 if (fc->ac.error == 0)
1079 afs_cache_permit(vnode, fc->key, cb_break);
1080}
1081
1082static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc,
1083 struct afs_vnode *vnode)
1084{
1085 if (fc->ac.error == -ENOENT) {
1086 set_bit(AFS_VNODE_DELETED, &vnode->flags);
1087 afs_break_callback(vnode);
1088 }
1089}
1090
1091
1092
1093
1094
1095
1096extern unsigned afs_debug;
1097
1098#define dbgprintk(FMT,...) \
1099 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1100
1101#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1102#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1103#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1104
1105
1106#if defined(__KDEBUG)
1107#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1108#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1109#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1110
1111#elif defined(CONFIG_AFS_DEBUG)
1112#define AFS_DEBUG_KENTER 0x01
1113#define AFS_DEBUG_KLEAVE 0x02
1114#define AFS_DEBUG_KDEBUG 0x04
1115
1116#define _enter(FMT,...) \
1117do { \
1118 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1119 kenter(FMT,##__VA_ARGS__); \
1120} while (0)
1121
1122#define _leave(FMT,...) \
1123do { \
1124 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1125 kleave(FMT,##__VA_ARGS__); \
1126} while (0)
1127
1128#define _debug(FMT,...) \
1129do { \
1130 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1131 kdebug(FMT,##__VA_ARGS__); \
1132} while (0)
1133
1134#else
1135#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1136#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1137#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1138#endif
1139
1140
1141
1142
1143#if 1
1144
1145#define ASSERT(X) \
1146do { \
1147 if (unlikely(!(X))) { \
1148 printk(KERN_ERR "\n"); \
1149 printk(KERN_ERR "AFS: Assertion failed\n"); \
1150 BUG(); \
1151 } \
1152} while(0)
1153
1154#define ASSERTCMP(X, OP, Y) \
1155do { \
1156 if (unlikely(!((X) OP (Y)))) { \
1157 printk(KERN_ERR "\n"); \
1158 printk(KERN_ERR "AFS: Assertion failed\n"); \
1159 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1160 (unsigned long)(X), (unsigned long)(Y)); \
1161 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1162 (unsigned long)(X), (unsigned long)(Y)); \
1163 BUG(); \
1164 } \
1165} while(0)
1166
1167#define ASSERTRANGE(L, OP1, N, OP2, H) \
1168do { \
1169 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1170 printk(KERN_ERR "\n"); \
1171 printk(KERN_ERR "AFS: Assertion failed\n"); \
1172 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1173 (unsigned long)(L), (unsigned long)(N), \
1174 (unsigned long)(H)); \
1175 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1176 (unsigned long)(L), (unsigned long)(N), \
1177 (unsigned long)(H)); \
1178 BUG(); \
1179 } \
1180} while(0)
1181
1182#define ASSERTIF(C, X) \
1183do { \
1184 if (unlikely((C) && !(X))) { \
1185 printk(KERN_ERR "\n"); \
1186 printk(KERN_ERR "AFS: Assertion failed\n"); \
1187 BUG(); \
1188 } \
1189} while(0)
1190
1191#define ASSERTIFCMP(C, X, OP, Y) \
1192do { \
1193 if (unlikely((C) && !((X) OP (Y)))) { \
1194 printk(KERN_ERR "\n"); \
1195 printk(KERN_ERR "AFS: Assertion failed\n"); \
1196 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1197 (unsigned long)(X), (unsigned long)(Y)); \
1198 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1199 (unsigned long)(X), (unsigned long)(Y)); \
1200 BUG(); \
1201 } \
1202} while(0)
1203
1204#else
1205
1206#define ASSERT(X) \
1207do { \
1208} while(0)
1209
1210#define ASSERTCMP(X, OP, Y) \
1211do { \
1212} while(0)
1213
1214#define ASSERTRANGE(L, OP1, N, OP2, H) \
1215do { \
1216} while(0)
1217
1218#define ASSERTIF(C, X) \
1219do { \
1220} while(0)
1221
1222#define ASSERTIFCMP(C, X, OP, Y) \
1223do { \
1224} while(0)
1225
1226#endif
1227