Lines Matching full:volume
2 /* AFS volume management
18 * Insert a volume into a cell. If there's an existing volume record, that is
22 struct afs_volume *volume) in afs_insert_volume_into_cell() argument
33 if (p->vid < volume->vid) { in afs_insert_volume_into_cell()
35 } else if (p->vid > volume->vid) { in afs_insert_volume_into_cell()
39 volume = p; in afs_insert_volume_into_cell()
43 set_bit(AFS_VOLUME_RM_TREE, &volume->flags); in afs_insert_volume_into_cell()
44 rb_replace_node_rcu(&p->cell_node, &volume->cell_node, &cell->volumes); in afs_insert_volume_into_cell()
48 rb_link_node_rcu(&volume->cell_node, parent, pp); in afs_insert_volume_into_cell()
49 rb_insert_color(&volume->cell_node, &cell->volumes); in afs_insert_volume_into_cell()
50 hlist_add_head_rcu(&volume->proc_link, &cell->proc_volumes); in afs_insert_volume_into_cell()
54 return volume; in afs_insert_volume_into_cell()
58 static void afs_remove_volume_from_cell(struct afs_volume *volume) in afs_remove_volume_from_cell() argument
60 struct afs_cell *cell = volume->cell; in afs_remove_volume_from_cell()
62 if (!hlist_unhashed(&volume->proc_link)) { in afs_remove_volume_from_cell()
63 trace_afs_volume(volume->debug_id, volume->vid, refcount_read(&volume->ref), in afs_remove_volume_from_cell()
66 hlist_del_rcu(&volume->proc_link); in afs_remove_volume_from_cell()
67 if (!test_and_set_bit(AFS_VOLUME_RM_TREE, &volume->flags)) in afs_remove_volume_from_cell()
68 rb_erase(&volume->cell_node, &cell->volumes); in afs_remove_volume_from_cell()
74 * Allocate a volume record and load it up from a vldb record.
81 struct afs_volume *volume; in afs_alloc_volume() local
84 volume = kzalloc(sizeof(struct afs_volume), GFP_KERNEL); in afs_alloc_volume()
85 if (!volume) in afs_alloc_volume()
88 volume->debug_id = atomic_inc_return(&afs_volume_debug_id); in afs_alloc_volume()
89 volume->vid = vldb->vid[params->type]; in afs_alloc_volume()
90 volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; in afs_alloc_volume()
91 volume->cell = afs_get_cell(params->cell, afs_cell_trace_get_vol); in afs_alloc_volume()
92 volume->type = params->type; in afs_alloc_volume()
93 volume->type_force = params->force; in afs_alloc_volume()
94 volume->name_len = vldb->name_len; in afs_alloc_volume()
95 volume->creation_time = TIME64_MIN; in afs_alloc_volume()
96 volume->update_time = TIME64_MIN; in afs_alloc_volume()
98 refcount_set(&volume->ref, 1); in afs_alloc_volume()
99 INIT_HLIST_NODE(&volume->proc_link); in afs_alloc_volume()
100 INIT_WORK(&volume->destructor, afs_destroy_volume); in afs_alloc_volume()
101 rwlock_init(&volume->servers_lock); in afs_alloc_volume()
102 mutex_init(&volume->volsync_lock); in afs_alloc_volume()
103 mutex_init(&volume->cb_check_lock); in afs_alloc_volume()
104 rwlock_init(&volume->cb_v_break_lock); in afs_alloc_volume()
105 INIT_LIST_HEAD(&volume->open_mmaps); in afs_alloc_volume()
106 init_rwsem(&volume->open_mmaps_lock); in afs_alloc_volume()
107 memcpy(volume->name, vldb->name, vldb->name_len + 1); in afs_alloc_volume()
110 volume->vids[i] = vldb->vid[i]; in afs_alloc_volume()
112 slist = afs_alloc_server_list(volume, params->key, vldb); in afs_alloc_volume()
119 rcu_assign_pointer(volume->servers, slist); in afs_alloc_volume()
120 trace_afs_volume(volume->debug_id, volume->vid, 1, afs_volume_trace_alloc); in afs_alloc_volume()
121 return volume; in afs_alloc_volume()
124 afs_put_cell(volume->cell, afs_cell_trace_put_vol); in afs_alloc_volume()
125 kfree(volume); in afs_alloc_volume()
131 * Look up or allocate a volume record.
137 struct afs_volume *candidate, *volume; in afs_lookup_volume() local
143 volume = afs_insert_volume_into_cell(params->cell, candidate); in afs_lookup_volume()
144 if (volume == candidate) in afs_lookup_volume()
145 afs_attach_volume_to_servers(volume, slist); in afs_lookup_volume()
148 return volume; in afs_lookup_volume()
152 * Look up a VLDB record for a volume.
175 * Look up a volume in the VL server and create a candidate volume record for
178 * The volume name can be one of the following:
179 * "%[cell:]volume[.]" R/W volume
180 * "#[cell:]volume[.]" R/O or R/W volume (rwparent=0),
181 * or R/W (rwparent=1) volume
182 * "%[cell:]volume.readonly" R/O volume
183 * "#[cell:]volume.readonly" R/O volume
184 * "%[cell:]volume.backup" Backup volume
185 * "#[cell:]volume.backup" Backup volume
193 * - Rule 2: If parent volume is R/O, then mount R/O volume by preference, R/W
195 * - Rule 3: If parent volume is R/W, then only mount R/W volume unless
201 struct afs_volume *volume; in afs_create_volume() local
210 volume = ERR_PTR(vldb->error); in afs_create_volume()
215 volume = ERR_PTR(-ENOMEDIUM); in afs_create_volume()
227 volume = afs_lookup_volume(params, vldb); in afs_create_volume()
231 return volume; in afs_create_volume()
235 * Destroy a volume record
239 struct afs_volume *volume = container_of(work, struct afs_volume, destructor); in afs_destroy_volume() local
240 struct afs_server_list *slist = rcu_access_pointer(volume->servers); in afs_destroy_volume()
242 _enter("%p", volume); in afs_destroy_volume()
245 ASSERTCMP(volume->cache, ==, NULL); in afs_destroy_volume()
248 afs_detach_volume_from_servers(volume, slist); in afs_destroy_volume()
249 afs_remove_volume_from_cell(volume); in afs_destroy_volume()
250 afs_put_serverlist(volume->cell->net, slist); in afs_destroy_volume()
251 afs_put_cell(volume->cell, afs_cell_trace_put_vol); in afs_destroy_volume()
252 trace_afs_volume(volume->debug_id, volume->vid, refcount_read(&volume->ref), in afs_destroy_volume()
254 kfree_rcu(volume, rcu); in afs_destroy_volume()
260 * Try to get a reference on a volume record.
262 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason) in afs_try_get_volume() argument
266 if (__refcount_inc_not_zero(&volume->ref, &r)) { in afs_try_get_volume()
267 trace_afs_volume(volume->debug_id, volume->vid, r + 1, reason); in afs_try_get_volume()
274 * Get a reference on a volume record.
276 struct afs_volume *afs_get_volume(struct afs_volume *volume, in afs_get_volume() argument
279 if (volume) { in afs_get_volume()
282 __refcount_inc(&volume->ref, &r); in afs_get_volume()
283 trace_afs_volume(volume->debug_id, volume->vid, r + 1, reason); in afs_get_volume()
285 return volume; in afs_get_volume()
290 * Drop a reference on a volume record.
292 void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason) in afs_put_volume() argument
294 if (volume) { in afs_put_volume()
295 unsigned int debug_id = volume->debug_id; in afs_put_volume()
296 afs_volid_t vid = volume->vid; in afs_put_volume()
300 zero = __refcount_dec_and_test(&volume->ref, &r); in afs_put_volume()
303 schedule_work(&volume->destructor); in afs_put_volume()
308 * Activate a volume.
310 int afs_activate_volume(struct afs_volume *volume) in afs_activate_volume() argument
317 volume->cell->name, volume->vid); in afs_activate_volume()
327 pr_err("AFS: Cache volume key already in use (%s)\n", name); in afs_activate_volume()
330 volume->cache = vcookie; in afs_activate_volume()
337 * Deactivate a volume.
339 void afs_deactivate_volume(struct afs_volume *volume) in afs_deactivate_volume() argument
341 _enter("%s", volume->name); in afs_deactivate_volume()
344 fscache_relinquish_volume(volume->cache, NULL, in afs_deactivate_volume()
345 test_bit(AFS_VOLUME_DELETED, &volume->flags)); in afs_deactivate_volume()
346 volume->cache = NULL; in afs_deactivate_volume()
353 * Query the VL service to update the volume status.
355 static int afs_update_volume_status(struct afs_volume *volume, struct key *key) in afs_update_volume_status() argument
367 idsz = snprintf(idbuf, sizeof(idbuf), "%llu", volume->vid); in afs_update_volume_status()
369 vldb = afs_vl_lookup_vldb(volume->cell, key, idbuf, idsz); in afs_update_volume_status()
375 /* See if the volume got renamed. */ in afs_update_volume_status()
376 if (vldb->name_len != volume->name_len || in afs_update_volume_status()
377 memcmp(vldb->name, volume->name, vldb->name_len) != 0) { in afs_update_volume_status()
379 memcpy(volume->name, vldb->name, AFS_MAXVOLNAME); in afs_update_volume_status()
380 volume->name_len = vldb->name_len; in afs_update_volume_status()
383 /* See if the volume's server list got updated. */ in afs_update_volume_status()
384 new = afs_alloc_server_list(volume, key, vldb); in afs_update_volume_status()
390 write_lock(&volume->servers_lock); in afs_update_volume_status()
393 old = rcu_dereference_protected(volume->servers, in afs_update_volume_status()
394 lockdep_is_held(&volume->servers_lock)); in afs_update_volume_status()
396 new->seq = volume->servers_seq + 1; in afs_update_volume_status()
397 rcu_assign_pointer(volume->servers, new); in afs_update_volume_status()
399 volume->servers_seq++; in afs_update_volume_status()
405 volume->update_at = ktime_get_real_seconds() + 10 * 60; in afs_update_volume_status()
407 volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; in afs_update_volume_status()
408 write_unlock(&volume->servers_lock); in afs_update_volume_status()
411 afs_reattach_volume_to_servers(volume, new, old); in afs_update_volume_status()
412 afs_put_serverlist(volume->cell->net, discard); in afs_update_volume_status()
422 * Make sure the volume record is up to date.
424 int afs_check_volume_status(struct afs_volume *volume, struct afs_operation *op) in afs_check_volume_status() argument
431 if (test_bit(AFS_VOLUME_WAIT, &volume->flags)) in afs_check_volume_status()
433 if (volume->update_at <= ktime_get_real_seconds() || in afs_check_volume_status()
434 test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags)) in afs_check_volume_status()
440 if (!test_and_set_bit_lock(AFS_VOLUME_UPDATING, &volume->flags)) { in afs_check_volume_status()
441 clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); in afs_check_volume_status()
442 ret = afs_update_volume_status(volume, op->key); in afs_check_volume_status()
444 set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); in afs_check_volume_status()
445 clear_bit_unlock(AFS_VOLUME_WAIT, &volume->flags); in afs_check_volume_status()
446 clear_bit_unlock(AFS_VOLUME_UPDATING, &volume->flags); in afs_check_volume_status()
447 wake_up_bit(&volume->flags, AFS_VOLUME_WAIT); in afs_check_volume_status()
453 if (!test_bit(AFS_VOLUME_WAIT, &volume->flags)) { in afs_check_volume_status()
458 ret = wait_on_bit(&volume->flags, AFS_VOLUME_WAIT, in afs_check_volume_status()