From 8d42443166a5d3800756db98498a4961a5ea5de7 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 13 Oct 2016 15:26:47 +1100 Subject: NFSv4: enhance nfs4_copy_lock_stateid to use a flock stateid if there is one A process can have two possible lock owner for a given open file: a per-process Posix lock owner and a per-open-file flock owner Use both of these when searching for a suitable stateid to use. With this patch, READ/WRITE requests will use the correct stateid if a flock lock is active. Signed-off-by: NeilBrown Reviewed-by: Jeff Layton Signed-off-by: Trond Myklebust --- fs/nfs/nfs4state.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'fs/nfs/nfs4state.c') diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 04db49d8e2e1..4f1de9be10c6 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -800,11 +800,13 @@ void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) * that is compatible with current->files */ static struct nfs4_lock_state * -__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) +__nfs4_find_lock_state(struct nfs4_state *state, + fl_owner_t fl_owner, fl_owner_t fl_owner2) { struct nfs4_lock_state *pos; list_for_each_entry(pos, &state->lock_states, ls_locks) { - if (pos->ls_owner != fl_owner) + if (pos->ls_owner != fl_owner && + pos->ls_owner != fl_owner2) continue; atomic_inc(&pos->ls_count); return pos; @@ -857,7 +859,7 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_ for(;;) { spin_lock(&state->state_lock); - lsp = __nfs4_find_lock_state(state, owner); + lsp = __nfs4_find_lock_state(state, owner, 0); if (lsp != NULL) break; if (new != NULL) { @@ -942,7 +944,7 @@ static int nfs4_copy_lock_stateid(nfs4_stateid *dst, const struct nfs_lock_context *l_ctx) { struct nfs4_lock_state *lsp; - fl_owner_t fl_owner; + fl_owner_t fl_owner, fl_flock_owner; int ret = -ENOENT; if (l_ctx == NULL) @@ -952,8 +954,10 @@ static int nfs4_copy_lock_stateid(nfs4_stateid *dst, goto out; fl_owner = l_ctx->lockowner.l_owner; + fl_flock_owner = l_ctx->open_context->flock_owner; + spin_lock(&state->state_lock); - lsp = __nfs4_find_lock_state(state, fl_owner); + lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) ret = -EIO; else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { -- cgit v1.2.3-59-g8ed1b