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[AFS]: Add "directory write" support.

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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>
This commit is contained in:
David Howells
2007-04-26 15:59:35 -07:00
committed by David S. Miller
parent c35eccb1f6
commit 260a980317
14 changed files with 1779 additions and 269 deletions
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36
fs/afs/callback.c
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@@ -44,7 +44,8 @@ void afs_init_callback_state(struct afs_server *server)
while (!RB_EMPTY_ROOT(&server->cb_promises)) {
vnode = rb_entry(server->cb_promises.rb_node,
struct afs_vnode, cb_promise);
printk("\nUNPROMISE on %p\n", vnode);
_debug("UNPROMISE { vid=%x vn=%u uq=%u}",
vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
rb_erase(&vnode->cb_promise, &server->cb_promises);
vnode->cb_promised = false;
}
@@ -68,7 +69,7 @@ void afs_broken_callback_work(struct work_struct *work)
/* we're only interested in dealing with a broken callback on *this*
* vnode and only if no-one else has dealt with it yet */
if (!mutex_trylock(&vnode->cb_broken_lock))
if (!mutex_trylock(&vnode->validate_lock))
return; /* someone else is dealing with it */
if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
@@ -84,13 +85,14 @@ void afs_broken_callback_work(struct work_struct *work)
/* if the vnode's data version number changed then its contents
* are different */
if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
_debug("zap data");
_debug("zap data {%x:%u}",
vnode->fid.vid, vnode->fid.vnode);
invalidate_remote_inode(&vnode->vfs_inode);
}
}
out:
mutex_unlock(&vnode->cb_broken_lock);
mutex_unlock(&vnode->validate_lock);
/* avoid the potential race whereby the mutex_trylock() in this
* function happens again between the clear_bit() and the
@@ -251,6 +253,32 @@ static void afs_do_give_up_callback(struct afs_server *server,
_leave("");
}
/*
* discard the callback on a deleted item
*/
void afs_discard_callback_on_delete(struct afs_vnode *vnode)
{
struct afs_server *server = vnode->server;
_enter("%d", vnode->cb_promised);
if (!vnode->cb_promised) {
_leave(" [not promised]");
return;
}
ASSERT(server != NULL);
spin_lock(&server->cb_lock);
if (vnode->cb_promised) {
ASSERT(server->cb_promises.rb_node != NULL);
rb_erase(&vnode->cb_promise, &server->cb_promises);
vnode->cb_promised = false;
}
spin_unlock(&server->cb_lock);
_leave("");
}
/*
* give up the callback registered for a vnode on the file server when the
* inode is being cleared