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AFS: fix a couple of problems with unlinking AFS files

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Fix a couple of problems with unlinking AFS files.

 (1) The parent directory wasn't being updated properly between unlink() and
     the following lookup().

     It seems that, for some reason, invalidate_remote_inode() wasn't
     discarding the directory contents correctly, so this patch calls
     invalidate_inode_pages2() instead on non-regular files.

 (2) afs_vnode_deleted_remotely() should handle vnodes that don't have a
     source server recorded without oopsing.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2007-05-10 22:22:20 -07:00 committed by Linus Torvalds
parent 9d577b6a31
commit 0f300ca928
4 changed files with 31 additions and 17 deletions
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2
fs/afs/file.c
View file

@ -236,7 +236,7 @@ static void afs_invalidatepage(struct page *page, unsigned long offset)
{
int ret = 1;
kenter("{%lu},%lu", page->index, offset);
_enter("{%lu},%lu", page->index, offset);
BUG_ON(!PageLocked(page));

10
fs/afs/inode.c
View file

@ -209,11 +209,15 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
*/
void afs_zap_data(struct afs_vnode *vnode)
{
_enter("zap data {%x:%u}", vnode->fid.vid, vnode->fid.vnode);
_enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
/* nuke all the non-dirty pages that aren't locked, mapped or being
* written back */
invalidate_remote_inode(&vnode->vfs_inode);
* written back in a regular file and completely discard the pages in a
* directory or symlink */
if (S_ISREG(vnode->vfs_inode.i_mode))
invalidate_remote_inode(&vnode->vfs_inode);
else
invalidate_inode_pages2(vnode->vfs_inode.i_mapping);
}
/*

3
fs/afs/super.c
View file

@ -488,6 +488,7 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
vnode->flags = 1 << AFS_VNODE_UNSET;
vnode->cb_promised = false;
_leave(" = %p", &vnode->vfs_inode);
return &vnode->vfs_inode;
}
@ -498,7 +499,7 @@ static void afs_destroy_inode(struct inode *inode)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
_enter("{%lu}", inode->i_ino);
_enter("%p{%x:%u}", inode, vnode->fid.vid, vnode->fid.vnode);
_debug("DESTROY INODE %p", inode);

33
fs/afs/vnode.c
View file

@ -175,24 +175,33 @@ static void afs_vnode_deleted_remotely(struct afs_vnode *vnode)
{
struct afs_server *server;
_enter("{%p}", vnode->server);
set_bit(AFS_VNODE_DELETED, &vnode->flags);
server = vnode->server;
if (vnode->cb_promised) {
spin_lock(&server->cb_lock);
if (server) {
if (vnode->cb_promised) {
rb_erase(&vnode->cb_promise, &server->cb_promises);
vnode->cb_promised = false;
spin_lock(&server->cb_lock);
if (vnode->cb_promised) {
rb_erase(&vnode->cb_promise,
&server->cb_promises);
vnode->cb_promised = false;
}
spin_unlock(&server->cb_lock);
}
spin_unlock(&server->cb_lock);
spin_lock(&server->fs_lock);
rb_erase(&vnode->server_rb, &server->fs_vnodes);
spin_unlock(&server->fs_lock);
vnode->server = NULL;
afs_put_server(server);
} else {
ASSERT(!vnode->cb_promised);
}
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);
_leave("");
}
/*
@ -225,7 +234,7 @@ void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
*/
static void afs_vnode_status_update_failed(struct afs_vnode *vnode, int ret)
{
_enter("%p,%d", vnode, ret);
_enter("{%x:%u},%d", vnode->fid.vid, vnode->fid.vnode, ret);
spin_lock(&vnode->lock);