NFSv4: Ensure the lockowners are labelled using the fl_owner and/or fl_pid
flock locks want to be labelled using the process pid, while posix locks
want to be labelled using the fl_owner.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 13a4f27..3e2f19b 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -602,12 +602,21 @@
* 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, pid_t fl_pid, unsigned int type)
{
struct nfs4_lock_state *pos;
list_for_each_entry(pos, &state->lock_states, ls_locks) {
- if (pos->ls_owner != fl_owner)
+ if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type)
continue;
+ switch (pos->ls_owner.lo_type) {
+ case NFS4_POSIX_LOCK_TYPE:
+ if (pos->ls_owner.lo_u.posix_owner != fl_owner)
+ continue;
+ break;
+ case NFS4_FLOCK_LOCK_TYPE:
+ if (pos->ls_owner.lo_u.flock_owner != fl_pid)
+ continue;
+ }
atomic_inc(&pos->ls_count);
return pos;
}
@@ -619,7 +628,7 @@
* exists, return an uninitialized one.
*
*/
-static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
+static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type)
{
struct nfs4_lock_state *lsp;
struct nfs_client *clp = state->owner->so_server->nfs_client;
@@ -633,7 +642,18 @@
lsp->ls_seqid.sequence = &lsp->ls_sequence;
atomic_set(&lsp->ls_count, 1);
lsp->ls_state = state;
- lsp->ls_owner = fl_owner;
+ lsp->ls_owner.lo_type = type;
+ switch (lsp->ls_owner.lo_type) {
+ case NFS4_FLOCK_LOCK_TYPE:
+ lsp->ls_owner.lo_u.flock_owner = fl_pid;
+ break;
+ case NFS4_POSIX_LOCK_TYPE:
+ lsp->ls_owner.lo_u.posix_owner = fl_owner;
+ break;
+ default:
+ kfree(lsp);
+ return NULL;
+ }
spin_lock(&clp->cl_lock);
nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64);
spin_unlock(&clp->cl_lock);
@@ -657,13 +677,13 @@
* exists, return an uninitialized one.
*
*/
-static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner)
+static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type)
{
struct nfs4_lock_state *lsp, *new = NULL;
for(;;) {
spin_lock(&state->state_lock);
- lsp = __nfs4_find_lock_state(state, owner);
+ lsp = __nfs4_find_lock_state(state, owner, pid, type);
if (lsp != NULL)
break;
if (new != NULL) {
@@ -674,7 +694,7 @@
break;
}
spin_unlock(&state->state_lock);
- new = nfs4_alloc_lock_state(state, owner);
+ new = nfs4_alloc_lock_state(state, owner, pid, type);
if (new == NULL)
return NULL;
}
@@ -730,7 +750,12 @@
if (fl->fl_ops != NULL)
return 0;
- lsp = nfs4_get_lock_state(state, fl->fl_owner);
+ if (fl->fl_flags & FL_POSIX)
+ lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE);
+ else if (fl->fl_flags & FL_FLOCK)
+ lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE);
+ else
+ return -EINVAL;
if (lsp == NULL)
return -ENOMEM;
fl->fl_u.nfs4_fl.owner = lsp;
@@ -742,7 +767,7 @@
* Byte-range lock aware utility to initialize the stateid of read/write
* requests.
*/
-void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner)
+void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid)
{
struct nfs4_lock_state *lsp;
int seq;
@@ -755,7 +780,7 @@
return;
spin_lock(&state->state_lock);
- lsp = __nfs4_find_lock_state(state, fl_owner);
+ lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE);
if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
memcpy(dst, &lsp->ls_stateid, sizeof(*dst));
spin_unlock(&state->state_lock);