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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>
This commit is contained in:
Trond Myklebust
parent
d3c7b7ccc1
commit
77041ed9b4
@ -142,10 +142,20 @@ enum {
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* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
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*/
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struct nfs4_lock_owner {
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unsigned int lo_type;
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#define NFS4_ANY_LOCK_TYPE (0U)
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#define NFS4_FLOCK_LOCK_TYPE (1U << 0)
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#define NFS4_POSIX_LOCK_TYPE (1U << 1)
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union {
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fl_owner_t posix_owner;
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pid_t flock_owner;
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} lo_u;
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};
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struct nfs4_lock_state {
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struct list_head ls_locks; /* Other lock stateids */
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struct nfs4_state * ls_state; /* Pointer to open state */
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fl_owner_t ls_owner; /* POSIX lock owner */
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#define NFS_LOCK_INITIALIZED 1
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int ls_flags;
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struct nfs_seqid_counter ls_seqid;
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@ -153,6 +163,7 @@ struct nfs4_lock_state {
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struct nfs_unique_id ls_id;
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nfs4_stateid ls_stateid;
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atomic_t ls_count;
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struct nfs4_lock_owner ls_owner;
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};
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/* bits for nfs4_state->flags */
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@ -310,7 +321,7 @@ extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
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extern void nfs41_handle_recall_slot(struct nfs_client *clp);
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extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
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extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
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extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
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extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t);
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extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
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extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
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@ -1767,7 +1767,7 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
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if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
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/* Use that stateid */
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} else if (state != NULL) {
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nfs4_copy_stateid(&arg.stateid, state, current->files);
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nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
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} else
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memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
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@ -602,12 +602,21 @@ void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode)
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* that is compatible with current->files
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*/
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static struct nfs4_lock_state *
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__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
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__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type)
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{
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struct nfs4_lock_state *pos;
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list_for_each_entry(pos, &state->lock_states, ls_locks) {
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if (pos->ls_owner != fl_owner)
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if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type)
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continue;
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switch (pos->ls_owner.lo_type) {
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case NFS4_POSIX_LOCK_TYPE:
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if (pos->ls_owner.lo_u.posix_owner != fl_owner)
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continue;
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break;
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case NFS4_FLOCK_LOCK_TYPE:
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if (pos->ls_owner.lo_u.flock_owner != fl_pid)
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continue;
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}
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atomic_inc(&pos->ls_count);
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return pos;
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}
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@ -619,7 +628,7 @@ __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
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* exists, return an uninitialized one.
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*
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*/
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static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
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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)
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{
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struct nfs4_lock_state *lsp;
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struct nfs_client *clp = state->owner->so_server->nfs_client;
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@ -633,7 +642,18 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f
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lsp->ls_seqid.sequence = &lsp->ls_sequence;
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atomic_set(&lsp->ls_count, 1);
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lsp->ls_state = state;
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lsp->ls_owner = fl_owner;
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lsp->ls_owner.lo_type = type;
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switch (lsp->ls_owner.lo_type) {
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case NFS4_FLOCK_LOCK_TYPE:
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lsp->ls_owner.lo_u.flock_owner = fl_pid;
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break;
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case NFS4_POSIX_LOCK_TYPE:
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lsp->ls_owner.lo_u.posix_owner = fl_owner;
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break;
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default:
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kfree(lsp);
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return NULL;
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}
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spin_lock(&clp->cl_lock);
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nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64);
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spin_unlock(&clp->cl_lock);
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@ -657,13 +677,13 @@ static void nfs4_free_lock_state(struct nfs4_lock_state *lsp)
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* exists, return an uninitialized one.
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*
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*/
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static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner)
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static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type)
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{
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struct nfs4_lock_state *lsp, *new = NULL;
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for(;;) {
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spin_lock(&state->state_lock);
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lsp = __nfs4_find_lock_state(state, owner);
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lsp = __nfs4_find_lock_state(state, owner, pid, type);
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if (lsp != NULL)
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break;
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if (new != NULL) {
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@ -674,7 +694,7 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_
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break;
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}
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spin_unlock(&state->state_lock);
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new = nfs4_alloc_lock_state(state, owner);
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new = nfs4_alloc_lock_state(state, owner, pid, type);
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if (new == NULL)
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return NULL;
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}
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@ -730,7 +750,12 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl)
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if (fl->fl_ops != NULL)
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return 0;
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lsp = nfs4_get_lock_state(state, fl->fl_owner);
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if (fl->fl_flags & FL_POSIX)
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lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE);
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else if (fl->fl_flags & FL_FLOCK)
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lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE);
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else
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return -EINVAL;
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if (lsp == NULL)
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return -ENOMEM;
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fl->fl_u.nfs4_fl.owner = lsp;
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@ -742,7 +767,7 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl)
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* Byte-range lock aware utility to initialize the stateid of read/write
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* requests.
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*/
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void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner)
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void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid)
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{
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struct nfs4_lock_state *lsp;
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int seq;
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@ -755,7 +780,7 @@ void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t f
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return;
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spin_lock(&state->state_lock);
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lsp = __nfs4_find_lock_state(state, fl_owner);
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lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE);
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if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
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memcpy(dst, &lsp->ls_stateid, sizeof(*dst));
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spin_unlock(&state->state_lock);
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@ -1361,7 +1361,7 @@ static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context
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p = reserve_space(xdr, NFS4_STATEID_SIZE);
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if (ctx->state != NULL) {
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nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner);
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nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
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xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
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} else
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xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
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