[AFS]: Add "directory write" support.
Add support for the create, link, symlink, unlink, mkdir, rmdir and
rename VFS operations to the in-kernel AFS filesystem.
Also:
(1) Fix dentry and inode revalidation. d_revalidate should only look at
state of the dentry. Revalidation of the contents of an inode pointed to
by a dentry is now separate.
(2) Fix afs_lookup() to hash negative dentries as well as positive ones.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 6120d4b..73bfa0b 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -80,6 +80,7 @@
void *reply; /* reply buffer (first part) */
void *reply2; /* reply buffer (second part) */
void *reply3; /* reply buffer (third part) */
+ void *reply4; /* reply buffer (fourth part) */
enum { /* call state */
AFS_CALL_REQUESTING, /* request is being sent for outgoing call */
AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */
@@ -300,19 +301,18 @@
#endif
struct afs_permits *permits; /* cache of permits so far obtained */
struct mutex permits_lock; /* lock for altering permits list */
+ struct mutex validate_lock; /* lock for validating this vnode */
wait_queue_head_t update_waitq; /* status fetch waitqueue */
- unsigned update_cnt; /* number of outstanding ops that will update the
+ int update_cnt; /* number of outstanding ops that will update the
* status */
spinlock_t lock; /* waitqueue/flags lock */
unsigned long flags;
#define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
-#define AFS_VNODE_CHANGED 1 /* set if vnode's metadata changed */
+#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
#define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */
#define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
#define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
#define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
-#define AFS_VNODE_DIR_CHANGED 6 /* set if vnode's parent dir metadata changed */
-#define AFS_VNODE_DIR_MODIFIED 7 /* set if vnode's parent dir data modified */
long acl_order; /* ACL check count (callback break count) */
@@ -320,7 +320,6 @@
struct rb_node server_rb; /* link in server->fs_vnodes */
struct rb_node cb_promise; /* link in server->cb_promises */
struct work_struct cb_broken_work; /* work to be done on callback break */
- struct mutex cb_broken_lock; /* lock against multiple attempts to fix break */
time_t cb_expires; /* time at which callback expires */
time_t cb_expires_at; /* time used to order cb_promise */
unsigned cb_version; /* callback version */
@@ -388,6 +387,7 @@
extern void afs_broken_callback_work(struct work_struct *);
extern void afs_break_callbacks(struct afs_server *, size_t,
struct afs_callback[]);
+extern void afs_discard_callback_on_delete(struct afs_vnode *);
extern void afs_give_up_callback(struct afs_vnode *);
extern void afs_dispatch_give_up_callbacks(struct work_struct *);
extern void afs_flush_callback_breaks(struct afs_server *);
@@ -448,14 +448,34 @@
const struct afs_wait_mode *);
extern int afs_fs_fetch_data(struct afs_server *, struct key *,
struct afs_vnode *, off_t, size_t, struct page *,
- struct afs_volsync *,
const struct afs_wait_mode *);
+extern int afs_fs_create(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, umode_t,
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *,
+ const struct afs_wait_mode *);
+extern int afs_fs_remove(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, bool,
+ const struct afs_wait_mode *);
+extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
+extern int afs_fs_symlink(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, const char *,
+ struct afs_fid *, struct afs_file_status *,
+ const struct afs_wait_mode *);
+extern int afs_fs_rename(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
/*
* inode.c
*/
extern struct inode *afs_iget(struct super_block *, struct key *,
- struct afs_fid *);
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *);
+extern int afs_validate(struct afs_vnode *, struct key *);
extern int afs_inode_getattr(struct vfsmount *, struct dentry *,
struct kstat *);
extern void afs_zap_permits(struct rcu_head *);
@@ -522,7 +542,11 @@
*/
extern spinlock_t afs_server_peer_lock;
-#define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0)
+#define afs_get_server(S) \
+do { \
+ _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
+ atomic_inc(&(S)->usage); \
+} while(0)
extern struct afs_server *afs_lookup_server(struct afs_cell *,
const struct in_addr *);
@@ -588,10 +612,24 @@
return &vnode->vfs_inode;
}
+extern void afs_vnode_finalise_status_update(struct afs_vnode *,
+ struct afs_server *);
extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
struct key *);
extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
off_t, size_t, struct page *);
+extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *,
+ umode_t, struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *, struct afs_server **);
+extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *,
+ bool);
+extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *,
+ const char *);
+extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *,
+ const char *, struct afs_fid *,
+ struct afs_file_status *, struct afs_server **);
+extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
+ struct key *, const char *, const char *);
/*
* volume.c