Lines Matching full:volume
1 /* AFS volume management
22 * Allocate a volume record and load it up from a vldb record.
29 struct afs_volume *volume; in afs_alloc_volume() local
36 volume = kzalloc(sizeof(struct afs_volume), GFP_KERNEL); in afs_alloc_volume()
37 if (!volume) in afs_alloc_volume()
40 volume->vid = vldb->vid[params->type]; in afs_alloc_volume()
41 volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; in afs_alloc_volume()
42 volume->cell = afs_get_cell(params->cell); in afs_alloc_volume()
43 volume->type = params->type; in afs_alloc_volume()
44 volume->type_force = params->force; in afs_alloc_volume()
45 volume->name_len = vldb->name_len; in afs_alloc_volume()
47 atomic_set(&volume->usage, 1); in afs_alloc_volume()
48 INIT_LIST_HEAD(&volume->proc_link); in afs_alloc_volume()
49 rwlock_init(&volume->servers_lock); in afs_alloc_volume()
50 rwlock_init(&volume->cb_v_break_lock); in afs_alloc_volume()
51 memcpy(volume->name, vldb->name, vldb->name_len + 1); in afs_alloc_volume()
60 volume->servers = slist; in afs_alloc_volume()
61 return volume; in afs_alloc_volume()
64 afs_put_cell(params->net, volume->cell); in afs_alloc_volume()
65 kfree(volume); in afs_alloc_volume()
71 * Look up a VLDB record for a volume.
130 * Look up a volume in the VL server and create a candidate volume record for
133 * The volume name can be one of the following:
134 * "%[cell:]volume[.]" R/W volume
135 * "#[cell:]volume[.]" R/O or R/W volume (rwparent=0),
136 * or R/W (rwparent=1) volume
137 * "%[cell:]volume.readonly" R/O volume
138 * "#[cell:]volume.readonly" R/O volume
139 * "%[cell:]volume.backup" Backup volume
140 * "#[cell:]volume.backup" Backup volume
148 * - Rule 2: If parent volume is R/O, then mount R/O volume by preference, R/W
150 * - Rule 3: If parent volume is R/W, then only mount R/W volume unless
156 struct afs_volume *volume; in afs_create_volume() local
165 volume = ERR_PTR(vldb->error); in afs_create_volume()
170 volume = ERR_PTR(-ENOMEDIUM); in afs_create_volume()
183 volume = afs_alloc_volume(params, vldb, type_mask); in afs_create_volume()
187 return volume; in afs_create_volume()
191 * Destroy a volume record
193 static void afs_destroy_volume(struct afs_net *net, struct afs_volume *volume) in afs_destroy_volume() argument
195 _enter("%p", volume); in afs_destroy_volume()
198 ASSERTCMP(volume->cache, ==, NULL); in afs_destroy_volume()
201 afs_put_serverlist(net, volume->servers); in afs_destroy_volume()
202 afs_put_cell(net, volume->cell); in afs_destroy_volume()
203 kfree(volume); in afs_destroy_volume()
209 * Drop a reference on a volume record.
211 void afs_put_volume(struct afs_cell *cell, struct afs_volume *volume) in afs_put_volume() argument
213 if (volume) { in afs_put_volume()
214 _enter("%s", volume->name); in afs_put_volume()
216 if (atomic_dec_and_test(&volume->usage)) in afs_put_volume()
217 afs_destroy_volume(cell->net, volume); in afs_put_volume()
222 * Activate a volume.
224 void afs_activate_volume(struct afs_volume *volume) in afs_activate_volume() argument
227 volume->cache = fscache_acquire_cookie(volume->cell->cache, in afs_activate_volume()
229 &volume->vid, sizeof(volume->vid), in afs_activate_volume()
231 volume, 0, true); in afs_activate_volume()
234 write_lock(&volume->cell->proc_lock); in afs_activate_volume()
235 list_add_tail(&volume->proc_link, &volume->cell->proc_volumes); in afs_activate_volume()
236 write_unlock(&volume->cell->proc_lock); in afs_activate_volume()
240 * Deactivate a volume.
242 void afs_deactivate_volume(struct afs_volume *volume) in afs_deactivate_volume() argument
244 _enter("%s", volume->name); in afs_deactivate_volume()
246 write_lock(&volume->cell->proc_lock); in afs_deactivate_volume()
247 list_del_init(&volume->proc_link); in afs_deactivate_volume()
248 write_unlock(&volume->cell->proc_lock); in afs_deactivate_volume()
251 fscache_relinquish_cookie(volume->cache, NULL, in afs_deactivate_volume()
252 test_bit(AFS_VOLUME_DELETED, &volume->flags)); in afs_deactivate_volume()
253 volume->cache = NULL; in afs_deactivate_volume()
260 * Query the VL service to update the volume status.
262 static int afs_update_volume_status(struct afs_volume *volume, struct key *key) in afs_update_volume_status() argument
274 idsz = sprintf(idbuf, "%u", volume->vid); in afs_update_volume_status()
276 vldb = afs_vl_lookup_vldb(volume->cell, key, idbuf, idsz); in afs_update_volume_status()
282 /* See if the volume got renamed. */ in afs_update_volume_status()
283 if (vldb->name_len != volume->name_len || in afs_update_volume_status()
284 memcmp(vldb->name, volume->name, vldb->name_len) != 0) { in afs_update_volume_status()
286 memcpy(volume->name, vldb->name, AFS_MAXVOLNAME); in afs_update_volume_status()
287 volume->name_len = vldb->name_len; in afs_update_volume_status()
290 /* See if the volume's server list got updated. */ in afs_update_volume_status()
291 new = afs_alloc_server_list(volume->cell, key, in afs_update_volume_status()
292 vldb, (1 << volume->type)); in afs_update_volume_status()
298 write_lock(&volume->servers_lock); in afs_update_volume_status()
301 old = volume->servers; in afs_update_volume_status()
303 new->seq = volume->servers_seq + 1; in afs_update_volume_status()
304 volume->servers = new; in afs_update_volume_status()
306 volume->servers_seq++; in afs_update_volume_status()
310 volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; in afs_update_volume_status()
311 clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); in afs_update_volume_status()
312 write_unlock(&volume->servers_lock); in afs_update_volume_status()
315 afs_put_serverlist(volume->cell->net, discard); in afs_update_volume_status()
324 * Make sure the volume record is up to date.
326 int afs_check_volume_status(struct afs_volume *volume, struct key *key) in afs_check_volume_status() argument
333 if (volume->update_at <= now) in afs_check_volume_status()
334 set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); in afs_check_volume_status()
337 if (!test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags) && in afs_check_volume_status()
338 !test_bit(AFS_VOLUME_WAIT, &volume->flags)) { in afs_check_volume_status()
343 if (!test_and_set_bit_lock(AFS_VOLUME_UPDATING, &volume->flags)) { in afs_check_volume_status()
344 ret = afs_update_volume_status(volume, key); in afs_check_volume_status()
345 clear_bit_unlock(AFS_VOLUME_WAIT, &volume->flags); in afs_check_volume_status()
346 clear_bit_unlock(AFS_VOLUME_UPDATING, &volume->flags); in afs_check_volume_status()
347 wake_up_bit(&volume->flags, AFS_VOLUME_WAIT); in afs_check_volume_status()
352 if (!test_bit(AFS_VOLUME_WAIT, &volume->flags)) { in afs_check_volume_status()
357 ret = wait_on_bit(&volume->flags, AFS_VOLUME_WAIT, TASK_INTERRUPTIBLE); in afs_check_volume_status()