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| author | J. Bruce Fields <bfields@redhat.com> | 2010-10-30 17:31:16 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-30 18:08:15 -0700 |
| commit | fcf744a96c66ca6ad7301a372034b771e57f30c4 (patch) | |
| tree | 4d4094cb2e04b391bd11eedf1466245dc8403704 /fs/nfsd | |
| parent | 05fa3135fdc7b9b510b502a35b6b97d2b38c6f48 (diff) | |
| download | linux-stable-fcf744a96c66ca6ad7301a372034b771e57f30c4.tar.gz linux-stable-fcf744a96c66ca6ad7301a372034b771e57f30c4.tar.bz2 linux-stable-fcf744a96c66ca6ad7301a372034b771e57f30c4.zip | |
nfsd4: initialize delegation pointer to lease
The NFSv4 server was initializing the dp->dl_flock pointer by the
somewhat ridiculous method of a locks_copy_lock callback.
Now that setlease uses the passed-in lock instead of doing a copy,
dl_flock no longer gets set, resulting in the lock leaking on delegation
release, and later possible hangs (among other problems).
So, initialize dl_flock and get rid of the callback.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 19 |
1 files changed, 2 insertions, 17 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 56347e0ac88d..b7f818b0580c 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2310,22 +2310,6 @@ void nfsd_release_deleg_cb(struct file_lock *fl) } /* - * Set the delegation file_lock back pointer. - * - * Called from setlease() with lock_kernel() held. - */ -static -void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) -{ - struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; - - dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); - if (!dp) - return; - dp->dl_flock = new; -} - -/* * Called from setlease() with lock_kernel() held */ static @@ -2355,7 +2339,6 @@ int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) static const struct lock_manager_operations nfsd_lease_mng_ops = { .fl_break = nfsd_break_deleg_cb, .fl_release_private = nfsd_release_deleg_cb, - .fl_copy_lock = nfsd_copy_lock_deleg_cb, .fl_mylease = nfsd_same_client_deleg_cb, .fl_change = nfsd_change_deleg_cb, }; @@ -2661,12 +2644,14 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta fl->fl_file = find_readable_file(stp->st_file); BUG_ON(!fl->fl_file); fl->fl_pid = current->tgid; + dp->dl_flock = fl; /* vfs_setlease checks to see if delegation should be handed out. * the lock_manager callbacks fl_mylease and fl_change are used */ if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) { dprintk("NFSD: setlease failed [%d], no delegation\n", status); + dp->dl_flock = NULL; unhash_delegation(dp); flag = NFS4_OPEN_DELEGATE_NONE; goto out; |