Lines Matching full:volume
2 /* AFS volume management
17 * Insert a volume into a cell. If there's an existing volume record, that is
21 struct afs_volume *volume) in afs_insert_volume_into_cell() argument
32 if (p->vid < volume->vid) { in afs_insert_volume_into_cell()
34 } else if (p->vid > volume->vid) { in afs_insert_volume_into_cell()
38 volume = p; in afs_insert_volume_into_cell()
42 set_bit(AFS_VOLUME_RM_TREE, &volume->flags); in afs_insert_volume_into_cell()
43 rb_replace_node_rcu(&p->cell_node, &volume->cell_node, &cell->volumes); in afs_insert_volume_into_cell()
47 rb_link_node_rcu(&volume->cell_node, parent, pp); in afs_insert_volume_into_cell()
48 rb_insert_color(&volume->cell_node, &cell->volumes); in afs_insert_volume_into_cell()
49 hlist_add_head_rcu(&volume->proc_link, &cell->proc_volumes); in afs_insert_volume_into_cell()
53 return volume; in afs_insert_volume_into_cell()
57 static void afs_remove_volume_from_cell(struct afs_volume *volume) in afs_remove_volume_from_cell() argument
59 struct afs_cell *cell = volume->cell; in afs_remove_volume_from_cell()
61 if (!hlist_unhashed(&volume->proc_link)) { in afs_remove_volume_from_cell()
62 trace_afs_volume(volume->vid, refcount_read(&cell->ref), in afs_remove_volume_from_cell()
65 hlist_del_rcu(&volume->proc_link); in afs_remove_volume_from_cell()
66 if (!test_and_set_bit(AFS_VOLUME_RM_TREE, &volume->flags)) in afs_remove_volume_from_cell()
67 rb_erase(&volume->cell_node, &cell->volumes); in afs_remove_volume_from_cell()
73 * Allocate a volume record and load it up from a vldb record.
80 struct afs_volume *volume; in afs_alloc_volume() local
83 volume = kzalloc(sizeof(struct afs_volume), GFP_KERNEL); in afs_alloc_volume()
84 if (!volume) in afs_alloc_volume()
87 volume->vid = vldb->vid[params->type]; in afs_alloc_volume()
88 volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; in afs_alloc_volume()
89 volume->cell = afs_get_cell(params->cell, afs_cell_trace_get_vol); in afs_alloc_volume()
90 volume->type = params->type; in afs_alloc_volume()
91 volume->type_force = params->force; in afs_alloc_volume()
92 volume->name_len = vldb->name_len; in afs_alloc_volume()
93 volume->creation_time = TIME64_MIN; in afs_alloc_volume()
94 volume->update_time = TIME64_MIN; in afs_alloc_volume()
96 refcount_set(&volume->ref, 1); in afs_alloc_volume()
97 INIT_HLIST_NODE(&volume->proc_link); in afs_alloc_volume()
98 INIT_WORK(&volume->destructor, afs_destroy_volume); in afs_alloc_volume()
99 rwlock_init(&volume->servers_lock); in afs_alloc_volume()
100 mutex_init(&volume->volsync_lock); in afs_alloc_volume()
101 mutex_init(&volume->cb_check_lock); in afs_alloc_volume()
102 rwlock_init(&volume->cb_v_break_lock); in afs_alloc_volume()
103 INIT_LIST_HEAD(&volume->open_mmaps); in afs_alloc_volume()
104 init_rwsem(&volume->open_mmaps_lock); in afs_alloc_volume()
105 memcpy(volume->name, vldb->name, vldb->name_len + 1); in afs_alloc_volume()
108 volume->vids[i] = vldb->vid[i]; in afs_alloc_volume()
110 slist = afs_alloc_server_list(volume, params->key, vldb); in afs_alloc_volume()
117 rcu_assign_pointer(volume->servers, slist); in afs_alloc_volume()
118 trace_afs_volume(volume->vid, 1, afs_volume_trace_alloc); in afs_alloc_volume()
119 return volume; in afs_alloc_volume()
122 afs_put_cell(volume->cell, afs_cell_trace_put_vol); in afs_alloc_volume()
123 kfree(volume); in afs_alloc_volume()
129 * Look up or allocate a volume record.
135 struct afs_volume *candidate, *volume; in afs_lookup_volume() local
141 volume = afs_insert_volume_into_cell(params->cell, candidate); in afs_lookup_volume()
142 if (volume == candidate) in afs_lookup_volume()
143 afs_attach_volume_to_servers(volume, slist); in afs_lookup_volume()
146 return volume; in afs_lookup_volume()
150 * Look up a VLDB record for a volume.
173 * Look up a volume in the VL server and create a candidate volume record for
176 * The volume name can be one of the following:
177 * "%[cell:]volume[.]" R/W volume
178 * "#[cell:]volume[.]" R/O or R/W volume (rwparent=0),
179 * or R/W (rwparent=1) volume
180 * "%[cell:]volume.readonly" R/O volume
181 * "#[cell:]volume.readonly" R/O volume
182 * "%[cell:]volume.backup" Backup volume
183 * "#[cell:]volume.backup" Backup volume
191 * - Rule 2: If parent volume is R/O, then mount R/O volume by preference, R/W
193 * - Rule 3: If parent volume is R/W, then only mount R/W volume unless
199 struct afs_volume *volume; in afs_create_volume() local
208 volume = ERR_PTR(vldb->error); in afs_create_volume()
213 volume = ERR_PTR(-ENOMEDIUM); in afs_create_volume()
225 volume = afs_lookup_volume(params, vldb); in afs_create_volume()
229 return volume; in afs_create_volume()
233 * Destroy a volume record
237 struct afs_volume *volume = container_of(work, struct afs_volume, destructor); in afs_destroy_volume() local
238 struct afs_server_list *slist = rcu_access_pointer(volume->servers); in afs_destroy_volume()
240 _enter("%p", volume); in afs_destroy_volume()
243 ASSERTCMP(volume->cache, ==, NULL); in afs_destroy_volume()
246 afs_detach_volume_from_servers(volume, slist); in afs_destroy_volume()
247 afs_remove_volume_from_cell(volume); in afs_destroy_volume()
248 afs_put_serverlist(volume->cell->net, slist); in afs_destroy_volume()
249 afs_put_cell(volume->cell, afs_cell_trace_put_vol); in afs_destroy_volume()
250 trace_afs_volume(volume->vid, refcount_read(&volume->ref), in afs_destroy_volume()
252 kfree_rcu(volume, rcu); in afs_destroy_volume()
258 * Try to get a reference on a volume record.
260 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason) in afs_try_get_volume() argument
264 if (__refcount_inc_not_zero(&volume->ref, &r)) { in afs_try_get_volume()
265 trace_afs_volume(volume->vid, r + 1, reason); in afs_try_get_volume()
272 * Get a reference on a volume record.
274 struct afs_volume *afs_get_volume(struct afs_volume *volume, in afs_get_volume() argument
277 if (volume) { in afs_get_volume()
280 __refcount_inc(&volume->ref, &r); in afs_get_volume()
281 trace_afs_volume(volume->vid, r + 1, reason); in afs_get_volume()
283 return volume; in afs_get_volume()
288 * Drop a reference on a volume record.
290 void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason) in afs_put_volume() argument
292 if (volume) { in afs_put_volume()
293 afs_volid_t vid = volume->vid; in afs_put_volume()
297 zero = __refcount_dec_and_test(&volume->ref, &r); in afs_put_volume()
300 schedule_work(&volume->destructor); in afs_put_volume()
305 * Activate a volume.
307 int afs_activate_volume(struct afs_volume *volume) in afs_activate_volume() argument
314 volume->cell->name, volume->vid); in afs_activate_volume()
324 pr_err("AFS: Cache volume key already in use (%s)\n", name); in afs_activate_volume()
327 volume->cache = vcookie; in afs_activate_volume()
334 * Deactivate a volume.
336 void afs_deactivate_volume(struct afs_volume *volume) in afs_deactivate_volume() argument
338 _enter("%s", volume->name); in afs_deactivate_volume()
341 fscache_relinquish_volume(volume->cache, NULL, in afs_deactivate_volume()
342 test_bit(AFS_VOLUME_DELETED, &volume->flags)); in afs_deactivate_volume()
343 volume->cache = NULL; in afs_deactivate_volume()
350 * Query the VL service to update the volume status.
352 static int afs_update_volume_status(struct afs_volume *volume, struct key *key) in afs_update_volume_status() argument
364 idsz = snprintf(idbuf, sizeof(idbuf), "%llu", volume->vid); in afs_update_volume_status()
366 vldb = afs_vl_lookup_vldb(volume->cell, key, idbuf, idsz); in afs_update_volume_status()
372 /* See if the volume got renamed. */ in afs_update_volume_status()
373 if (vldb->name_len != volume->name_len || in afs_update_volume_status()
374 memcmp(vldb->name, volume->name, vldb->name_len) != 0) { in afs_update_volume_status()
376 memcpy(volume->name, vldb->name, AFS_MAXVOLNAME); in afs_update_volume_status()
377 volume->name_len = vldb->name_len; in afs_update_volume_status()
380 /* See if the volume's server list got updated. */ in afs_update_volume_status()
381 new = afs_alloc_server_list(volume, key, vldb); in afs_update_volume_status()
387 write_lock(&volume->servers_lock); in afs_update_volume_status()
390 old = rcu_dereference_protected(volume->servers, in afs_update_volume_status()
391 lockdep_is_held(&volume->servers_lock)); in afs_update_volume_status()
393 new->seq = volume->servers_seq + 1; in afs_update_volume_status()
394 rcu_assign_pointer(volume->servers, new); in afs_update_volume_status()
396 volume->servers_seq++; in afs_update_volume_status()
402 volume->update_at = ktime_get_real_seconds() + 10 * 60; in afs_update_volume_status()
404 volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; in afs_update_volume_status()
405 write_unlock(&volume->servers_lock); in afs_update_volume_status()
408 afs_reattach_volume_to_servers(volume, new, old); in afs_update_volume_status()
409 afs_put_serverlist(volume->cell->net, discard); in afs_update_volume_status()
419 * Make sure the volume record is up to date.
421 int afs_check_volume_status(struct afs_volume *volume, struct afs_operation *op) in afs_check_volume_status() argument
428 if (test_bit(AFS_VOLUME_WAIT, &volume->flags)) in afs_check_volume_status()
430 if (volume->update_at <= ktime_get_real_seconds() || in afs_check_volume_status()
431 test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags)) in afs_check_volume_status()
437 if (!test_and_set_bit_lock(AFS_VOLUME_UPDATING, &volume->flags)) { in afs_check_volume_status()
438 clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); in afs_check_volume_status()
439 ret = afs_update_volume_status(volume, op->key); in afs_check_volume_status()
441 set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); in afs_check_volume_status()
442 clear_bit_unlock(AFS_VOLUME_WAIT, &volume->flags); in afs_check_volume_status()
443 clear_bit_unlock(AFS_VOLUME_UPDATING, &volume->flags); in afs_check_volume_status()
444 wake_up_bit(&volume->flags, AFS_VOLUME_WAIT); in afs_check_volume_status()
450 if (!test_bit(AFS_VOLUME_WAIT, &volume->flags)) { in afs_check_volume_status()
455 ret = wait_on_bit(&volume->flags, AFS_VOLUME_WAIT, in afs_check_volume_status()