#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/sched.h>
#include "internal.h"
static const char *afs_voltypes[] = { "R/W", "R/O", "BAK" };
* - Rule 3: If parent volume is R/W, then only mount R/W volume unless
* explicitly told otherwise
*/
-struct afs_volume *afs_volume_lookup(const char *name, struct afs_cell *cell,
- int rwpath)
+struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
{
struct afs_vlocation *vlocation = NULL;
struct afs_volume *volume = NULL;
struct afs_server *server = NULL;
- afs_voltype_t type;
- const char *cellname, *volname, *suffix;
char srvtmask;
- int force, ret, loop, cellnamesz, volnamesz;
+ int ret, loop;
- _enter("%s,,%d,", name, rwpath);
-
- if (!name || (name[0] != '%' && name[0] != '#') || !name[1]) {
- printk("kAFS: unparsable volume name\n");
- return ERR_PTR(-EINVAL);
- }
-
- /* determine the type of volume we're looking for */
- force = 0;
- type = AFSVL_ROVOL;
-
- if (rwpath || name[0] == '%') {
- type = AFSVL_RWVOL;
- force = 1;
- }
-
- suffix = strrchr(name, '.');
- if (suffix) {
- if (strcmp(suffix, ".readonly") == 0) {
- type = AFSVL_ROVOL;
- force = 1;
- } else if (strcmp(suffix, ".backup") == 0) {
- type = AFSVL_BACKVOL;
- force = 1;
- } else if (suffix[1] == 0) {
- } else {
- suffix = NULL;
- }
- }
-
- /* split the cell and volume names */
- name++;
- volname = strchr(name, ':');
- if (volname) {
- cellname = name;
- cellnamesz = volname - name;
- volname++;
- } else {
- volname = name;
- cellname = NULL;
- cellnamesz = 0;
- }
-
- volnamesz = suffix ? suffix - volname : strlen(volname);
-
- _debug("CELL:%*.*s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
- cellnamesz, cellnamesz, cellname ?: "", cell,
- volnamesz, volnamesz, volname, suffix ?: "-",
- type,
- force ? " FORCE" : "");
-
- /* lookup the cell record */
- if (cellname || !cell) {
- cell = afs_cell_lookup(cellname, cellnamesz);
- if (IS_ERR(cell)) {
- ret = PTR_ERR(cell);
- printk("kAFS: unable to lookup cell '%s'\n",
- cellname ?: "");
- goto error;
- }
- } else {
- afs_get_cell(cell);
- }
+ _enter("{%*.*s,%d}",
+ params->volnamesz, params->volnamesz, params->volname, params->rwpath);
/* lookup the volume location record */
- vlocation = afs_vlocation_lookup(cell, volname, volnamesz);
+ vlocation = afs_vlocation_lookup(params->cell, params->key,
+ params->volname, params->volnamesz);
if (IS_ERR(vlocation)) {
ret = PTR_ERR(vlocation);
vlocation = NULL;
/* make the final decision on the type we want */
ret = -ENOMEDIUM;
- if (force && !(vlocation->vldb.vidmask & (1 << type)))
+ if (params->force && !(vlocation->vldb.vidmask & (1 << params->type)))
goto error;
srvtmask = 0;
for (loop = 0; loop < vlocation->vldb.nservers; loop++)
srvtmask |= vlocation->vldb.srvtmask[loop];
- if (force) {
- if (!(srvtmask & (1 << type)))
+ if (params->force) {
+ if (!(srvtmask & (1 << params->type)))
goto error;
} else if (srvtmask & AFS_VOL_VTM_RO) {
- type = AFSVL_ROVOL;
+ params->type = AFSVL_ROVOL;
} else if (srvtmask & AFS_VOL_VTM_RW) {
- type = AFSVL_RWVOL;
+ params->type = AFSVL_RWVOL;
} else {
goto error;
}
- down_write(&cell->vl_sem);
+ down_write(¶ms->cell->vl_sem);
/* is the volume already active? */
- if (vlocation->vols[type]) {
+ if (vlocation->vols[params->type]) {
/* yes - re-use it */
- volume = vlocation->vols[type];
+ volume = vlocation->vols[params->type];
afs_get_volume(volume);
goto success;
}
goto error_up;
atomic_set(&volume->usage, 1);
- volume->type = type;
- volume->type_force = force;
- volume->cell = cell;
- volume->vid = vlocation->vldb.vid[type];
+ volume->type = params->type;
+ volume->type_force = params->force;
+ volume->cell = params->cell;
+ volume->vid = vlocation->vldb.vid[params->type];
init_rwsem(&volume->server_sem);
afs_get_vlocation(vlocation);
volume->vlocation = vlocation;
- vlocation->vols[type] = volume;
+ vlocation->vols[volume->type] = volume;
success:
_debug("kAFS selected %s volume %08x",
afs_voltypes[volume->type], volume->vid);
- up_write(&cell->vl_sem);
+ up_write(¶ms->cell->vl_sem);
afs_put_vlocation(vlocation);
- afs_put_cell(cell);
_leave(" = %p", volume);
return volume;
/* clean up */
error_up:
- up_write(&cell->vl_sem);
+ up_write(¶ms->cell->vl_sem);
error:
afs_put_vlocation(vlocation);
- afs_put_cell(cell);
_leave(" = %d", ret);
return ERR_PTR(ret);
error_discard:
- up_write(&cell->vl_sem);
+ up_write(¶ms->cell->vl_sem);
for (loop = volume->nservers - 1; loop >= 0; loop--)
afs_put_server(volume->servers[loop]);
* - releases the ref on the server struct that was acquired by picking
* - records result of using a particular server to access a volume
* - return 0 to try again, 1 if okay or to issue error
+ * - the caller must release the server struct if result was 0
*/
int afs_volume_release_fileserver(struct afs_vnode *vnode,
struct afs_server *server,
case 0:
server->fs_act_jif = jiffies;
server->fs_state = 0;
- break;
+ _leave("");
+ return 1;
/* the fileserver denied all knowledge of the volume */
case -ENOMEDIUM:
server->fs_act_jif = jiffies;
case -ENOMEM:
case -ENONET:
- break;
+ /* tell the caller to accept the result */
+ afs_put_server(server);
+ _leave(" [local failure]");
+ return 1;
}
- /* tell the caller to accept the result */
- afs_put_server(server);
- _leave("");
- return 1;
-
/* tell the caller to loop around and try the next server */
try_next_server_upw:
up_write(&volume->server_sem);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff