bad = dump_tree_aux(node->rb_left, node, depth + 2, '/');
vnode = rb_entry(node, struct afs_vnode, cb_promise);
- kdebug("%c %*.*s%c%p {%d}",
+ _debug("%c %*.*s%c%p {%d}",
rb_is_red(node) ? 'R' : 'B',
depth, depth, "", lr,
vnode, vnode->cb_expires_at);
static noinline void dump_tree(const char *name, struct afs_server *server)
{
- kenter("%s", name);
+ _enter("%s", name);
if (dump_tree_aux(server->cb_promises.rb_node, NULL, 0, '-'))
BUG();
}
spin_unlock(&server->cb_lock);
}
+ spin_lock(&vnode->server->fs_lock);
+ rb_erase(&vnode->server_rb, &vnode->server->fs_vnodes);
+ spin_unlock(&vnode->server->fs_lock);
+
+ vnode->server = NULL;
afs_put_server(server);
}
/*
- * finish off updating the recorded status of a file
+ * finish off updating the recorded status of a file after a successful
+ * operation completion
* - starts callback expiry timer
* - adds to server's callback list
*/
-static void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
- struct afs_server *server,
- int ret)
+void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
+ struct afs_server *server)
{
struct afs_server *oldserver = NULL;
- _enter("%p,%p,%d", vnode, server, ret);
+ _enter("%p,%p", vnode, server);
+
+ spin_lock(&vnode->lock);
+ clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ afs_vnode_note_promise(vnode, server);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+
+ wake_up_all(&vnode->update_waitq);
+ afs_put_server(oldserver);
+ _leave("");
+}
+
+/*
+ * finish off updating the recorded status of a file after an operation failed
+ */
+static void afs_vnode_status_update_failed(struct afs_vnode *vnode, int ret)
+{
+ _enter("%p,%d", vnode, ret);
spin_lock(&vnode->lock);
clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
- switch (ret) {
- case 0:
- afs_vnode_note_promise(vnode, server);
- break;
- case -ENOENT:
+ if (ret == -ENOENT) {
/* the file was deleted on the server */
_debug("got NOENT from server - marking file deleted");
afs_vnode_deleted_remotely(vnode);
- break;
- default:
- break;
}
vnode->update_cnt--;
-
+ ASSERTCMP(vnode->update_cnt, >=, 0);
spin_unlock(&vnode->lock);
wake_up_all(&vnode->update_waitq);
-
- afs_put_server(oldserver);
-
_leave("");
}
return 0;
}
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+
if (vnode->update_cnt > 0) {
/* someone else started a fetch */
+ _debug("wait on fetch %d", vnode->update_cnt);
+
set_current_state(TASK_UNINTERRUPTIBLE);
ASSERT(myself.func != NULL);
add_wait_queue(&vnode->update_waitq, &myself);
/* pick a server to query */
server = afs_volume_pick_fileserver(vnode);
if (IS_ERR(server))
- return PTR_ERR(server);
+ goto no_server;
_debug("USING SERVER: %p{%08x}",
server, ntohl(server->addr.s_addr));
} while (!afs_volume_release_fileserver(vnode, server, ret));
/* adjust the flags */
- if (ret == 0 && auth_vnode)
- afs_cache_permit(vnode, key, acl_order);
- afs_vnode_finalise_status_update(vnode, server, ret);
+ if (ret == 0) {
+ _debug("adjust");
+ if (auth_vnode)
+ afs_cache_permit(vnode, key, acl_order);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ _debug("failed [%d]", ret);
+ afs_vnode_status_update_failed(vnode, ret);
+ }
- _leave(" = %d", ret);
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
}
/*
* fetch file data from the volume
- * - TODO implement caching and server failover
+ * - TODO implement caching
*/
int afs_vnode_fetch_data(struct afs_vnode *vnode, struct key *key,
off_t offset, size_t length, struct page *page)
/* pick a server to query */
server = afs_volume_pick_fileserver(vnode);
if (IS_ERR(server))
- return PTR_ERR(server);
+ goto no_server;
_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
ret = afs_fs_fetch_data(server, key, vnode, offset, length,
- page, NULL, &afs_sync_call);
+ page, &afs_sync_call);
} while (!afs_volume_release_fileserver(vnode, server, ret));
/* adjust the flags */
- afs_vnode_finalise_status_update(vnode, server, ret);
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ }
_leave(" = %d", ret);
return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ return PTR_ERR(server);
+}
+
+/*
+ * make a file or a directory
+ */
+int afs_vnode_create(struct afs_vnode *vnode, struct key *key,
+ const char *name, umode_t mode, struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_callback *newcb, struct afs_server **_server)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s,,",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're creating in */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_create(server, key, vnode, name, mode, newfid,
+ newstatus, newcb, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ *_server = server;
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ *_server = NULL;
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * remove a file or directory
+ */
+int afs_vnode_remove(struct afs_vnode *vnode, struct key *key, const char *name,
+ bool isdir)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're removing from */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_remove(server, key, vnode, name, isdir,
+ &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * create a hard link
+ */
+extern int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+ struct key *key, const char *name)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s",
+ dvnode->volume->vlocation->vldb.name,
+ dvnode->fid.vid,
+ dvnode->fid.vnode,
+ dvnode->fid.unique,
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're removing from */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ spin_lock(&dvnode->lock);
+ dvnode->update_cnt++;
+ spin_unlock(&dvnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(dvnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_link(server, key, dvnode, vnode, name,
+ &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(dvnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_vnode_finalise_status_update(dvnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ afs_vnode_status_update_failed(dvnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ spin_lock(&dvnode->lock);
+ dvnode->update_cnt--;
+ ASSERTCMP(dvnode->update_cnt, >=, 0);
+ spin_unlock(&dvnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * create a symbolic link
+ */
+int afs_vnode_symlink(struct afs_vnode *vnode, struct key *key,
+ const char *name, const char *content,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_server **_server)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s,%s,,,",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name, content);
+
+ /* this op will fetch the status on the directory we're creating in */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_symlink(server, key, vnode, name, content,
+ newfid, newstatus, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ *_server = server;
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ *_server = NULL;
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * rename a file
+ */
+int afs_vnode_rename(struct afs_vnode *orig_dvnode,
+ struct afs_vnode *new_dvnode,
+ struct key *key,
+ const char *orig_name,
+ const char *new_name)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s,%s",
+ orig_dvnode->volume->vlocation->vldb.name,
+ orig_dvnode->fid.vid,
+ orig_dvnode->fid.vnode,
+ orig_dvnode->fid.unique,
+ new_dvnode->volume->vlocation->vldb.name,
+ new_dvnode->fid.vid,
+ new_dvnode->fid.vnode,
+ new_dvnode->fid.unique,
+ key_serial(key),
+ orig_name,
+ new_name);
+
+ /* this op will fetch the status on both the directories we're dealing
+ * with */
+ spin_lock(&orig_dvnode->lock);
+ orig_dvnode->update_cnt++;
+ spin_unlock(&orig_dvnode->lock);
+ if (new_dvnode != orig_dvnode) {
+ spin_lock(&new_dvnode->lock);
+ new_dvnode->update_cnt++;
+ spin_unlock(&new_dvnode->lock);
+ }
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(orig_dvnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_rename(server, key, orig_dvnode, orig_name,
+ new_dvnode, new_name, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(orig_dvnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(orig_dvnode, server);
+ if (new_dvnode != orig_dvnode)
+ afs_vnode_finalise_status_update(new_dvnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(orig_dvnode, ret);
+ if (new_dvnode != orig_dvnode)
+ afs_vnode_status_update_failed(new_dvnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, orig_dvnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&orig_dvnode->lock);
+ orig_dvnode->update_cnt--;
+ ASSERTCMP(orig_dvnode->update_cnt, >=, 0);
+ spin_unlock(&orig_dvnode->lock);
+ if (new_dvnode != orig_dvnode) {
+ spin_lock(&new_dvnode->lock);
+ new_dvnode->update_cnt--;
+ ASSERTCMP(new_dvnode->update_cnt, >=, 0);
+ spin_unlock(&new_dvnode->lock);
+ }
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), orig_dvnode->update_cnt);
+ return PTR_ERR(server);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff