linux/fs/lockd, branch v3.6.4

NLM: nlm_lookup_file() may return NLMv4-specific error codes

2012-10-28T17:56:10Z

commit cd0b16c1c3cda12dbed1f8de8f1a9b0591990724 upstream. If the filehandle is stale, or open access is denied for some reason, nlm_fopen() may return one of the NLMv4-specific error codes nlm4_stale_fh or nlm4_failed. These get passed right through nlm_lookup_file(), and so when nlmsvc_retrieve_args() calls the latter, it needs to filter the result through the cast_status() machinery. Failure to do so, will trigger the BUG_ON() in encode_nlm_stat... Signed-off-by: Trond Myklebust Reported-by: Larry McVoy Signed-off-by: J. Bruce Fields Signed-off-by: Greg Kroah-Hartman

lockd: create and use per-net NSM RPC clients on MON/UNMON requests

2012-10-21T16:32:38Z

commit cb7323fffa85df37161f4d3be45e1f787808309c upstream. NSM RPC client can be required on NFSv3 umount, when child reaper is dying (and destroying it's mount namespace). It means, that current nsproxy is set to NULL already, but creation of RPC client requires UTS namespace for gaining hostname string. This patch creates reference-counted per-net NSM client on first monitor request and destroys it after last unmonitor request. Signed-off-by: Stanislav Kinsbursky Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman

lockd: use rpc client's cl_nodename for id encoding

2012-10-21T16:32:38Z

commit 303a7ce92064c285a04c870f2dc0192fdb2968cb upstream. Taking hostname from uts namespace if not safe, because this cuold be performind during umount operation on child reaper death. And in this case current->nsproxy is NULL already. Signed-off-by: Stanislav Kinsbursky Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman

lockd: per-net NSM client creation and destruction helpers introduced

2012-10-21T16:32:38Z

commit e9406db20fecbfcab646bad157b4cfdc7cadddfb upstream. NSM RPC client can be required on NFSv3 umount, when child reaper is dying (and destroying it's mount namespace). It means, that current nsproxy is set to NULL already, but creation of RPC client requires UTS namespace for gaining hostname string. This patch introduces reference counted NFS RPC clients creation and destruction helpers (similar to RPCBIND RPC clients). Signed-off-by: Stanislav Kinsbursky Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman

close the race in nlmsvc_free_block()

2012-09-23T00:48:20Z

we need to grab mutex before the reference counter reaches 0 Signed-off-by: Al Viro

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-08-01T17:26:23Z

Pull second vfs pile from Al Viro: "The stuff in there: fsfreeze deadlock fixes by Jan (essentially, the deadlock reproduced by xfstests 068), symlink and hardlink restriction patches, plus assorted cleanups and fixes. Note that another fsfreeze deadlock (emergency thaw one) is *not* dealt with - the series by Fernando conflicts a lot with Jan's, breaks userland ABI (FIFREEZE semantics gets changed) and trades the deadlock for massive vfsmount leak; this is going to be handled next cycle. There probably will be another pull request, but that stuff won't be in it." Fix up trivial conflicts due to unrelated changes next to each other in drivers/{staging/gdm72xx/usb_boot.c, usb/gadget/storage_common.c} * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (54 commits) delousing target_core_file a bit Documentation: Correct s_umount state for freeze_fs/unfreeze_fs fs: Remove old freezing mechanism ext2: Implement freezing btrfs: Convert to new freezing mechanism nilfs2: Convert to new freezing mechanism ntfs: Convert to new freezing mechanism fuse: Convert to new freezing mechanism gfs2: Convert to new freezing mechanism ocfs2: Convert to new freezing mechanism xfs: Convert to new freezing code ext4: Convert to new freezing mechanism fs: Protect write paths by sb_start_write - sb_end_write fs: Skip atime update on frozen filesystem fs: Add freezing handling to mnt_want_write() / mnt_drop_write() fs: Improve filesystem freezing handling switch the protection of percpu_counter list to spinlock nfsd: Push mnt_want_write() outside of i_mutex btrfs: Push mnt_want_write() outside of i_mutex fat: Push mnt_want_write() outside of i_mutex ...

lockd: handle lockowner allocation failure in nlmclnt_proc()

2012-07-29T19:17:39Z

Signed-off-by: Al Viro

lockd: shift grabbing a reference to nlm_host into nlm_alloc_call()

2012-07-29T19:09:57Z

It's used both for client and server hosts; we can't do nlmclnt_release_host() on failure exits, since the host might need nlmsvc_release_host(), with BUG_ON() for calling the wrong one. Makes life simpler for callers, actually... Signed-off-by: Al Viro

Lockd: move grace period management from lockd() to per-net functions

2012-07-27T20:49:22Z

Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields

LockD: pass actual network namespace to grace period management functions

2012-07-27T20:49:22Z

Passed network namespace replaced hard-coded init_net Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields