diff options
Diffstat (limited to 'fs/nfs/nfs4state.c')
| -rw-r--r-- | fs/nfs/nfs4state.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 95baf7d340f0..cf869802ff23 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -797,21 +797,33 @@ void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) /* * Search the state->lock_states for an existing lock_owner - * that is compatible with current->files + * that is compatible with either of the given owners. + * If the second is non-zero, then the first refers to a Posix-lock + * owner (current->files) and the second refers to a flock/OFD + * owner (struct file*). In that case, prefer a match for the first + * owner. + * If both sorts of locks are held on the one file we cannot know + * which stateid was intended to be used, so a "correct" choice cannot + * be made. Failing that, a "consistent" choice is preferable. The + * consistent choice we make is to prefer the first owner, that of a + * Posix lock. */ static struct nfs4_lock_state * __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, fl_owner_t fl_owner2) { - struct nfs4_lock_state *pos; + struct nfs4_lock_state *pos, *ret = NULL; list_for_each_entry(pos, &state->lock_states, ls_locks) { - if (pos->ls_owner != fl_owner && - pos->ls_owner != fl_owner2) - continue; - atomic_inc(&pos->ls_count); - return pos; + if (pos->ls_owner == fl_owner) { + ret = pos; + break; + } + if (pos->ls_owner == fl_owner2) + ret = pos; } - return NULL; + if (ret) + atomic_inc(&ret->ls_count); + return ret; } /* |