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NFSv4: change nfs4_select_rw_stateid to take a lock_context inplace of lock_owner
The only time that a lock_context is not immediately available is in setattr, and now that it has an open_context, it can easily find one with nfs_get_lock_context. This removes the need for the on-stack nfs_lockowner. This change is preparation for correctly support flock stateids. Signed-off-by: NeilBrown <neilb@suse.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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parent
29b59f9416
commit
1739347549
3 changed files with 12 additions and 16 deletions
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@ -457,7 +457,7 @@ extern void nfs41_handle_server_scope(struct nfs_client *,
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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 int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t,
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const struct nfs_lockowner *, nfs4_stateid *,
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const struct nfs_lock_context *, nfs4_stateid *,
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struct rpc_cred **);
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extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
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@ -2945,12 +2945,13 @@ static int _nfs4_do_setattr(struct inode *inode,
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if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
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/* Use that stateid */
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} else if (truncate && ctx != NULL) {
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struct nfs_lockowner lockowner = {
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.l_owner = current->files,
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};
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struct nfs_lock_context *l_ctx;
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if (!nfs4_valid_open_stateid(ctx->state))
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return -EBADF;
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if (nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, &lockowner,
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l_ctx = nfs_get_lock_context(ctx);
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if (IS_ERR(l_ctx))
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return PTR_ERR(l_ctx);
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if (nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
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&arg->stateid, &delegation_cred) == -EIO)
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return -EBADF;
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} else
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@ -4576,11 +4577,7 @@ int nfs4_set_rw_stateid(nfs4_stateid *stateid,
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const struct nfs_lock_context *l_ctx,
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fmode_t fmode)
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{
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const struct nfs_lockowner *lockowner = NULL;
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if (l_ctx != NULL)
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lockowner = &l_ctx->lockowner;
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return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
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return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
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}
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EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
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@ -939,20 +939,19 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl)
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static int nfs4_copy_lock_stateid(nfs4_stateid *dst,
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struct nfs4_state *state,
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const struct nfs_lockowner *lockowner)
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const struct nfs_lock_context *l_ctx)
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{
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struct nfs4_lock_state *lsp;
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fl_owner_t fl_owner;
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int ret = -ENOENT;
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if (lockowner == NULL)
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if (l_ctx == NULL)
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goto out;
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if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
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goto out;
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fl_owner = lockowner->l_owner;
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fl_owner = l_ctx->lockowner.l_owner;
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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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if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
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@ -986,7 +985,7 @@ static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state)
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* requests.
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*/
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int nfs4_select_rw_stateid(struct nfs4_state *state,
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fmode_t fmode, const struct nfs_lockowner *lockowner,
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fmode_t fmode, const struct nfs_lock_context *l_ctx,
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nfs4_stateid *dst, struct rpc_cred **cred)
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{
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int ret;
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@ -995,7 +994,7 @@ int nfs4_select_rw_stateid(struct nfs4_state *state,
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return -EIO;
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if (cred != NULL)
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*cred = NULL;
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ret = nfs4_copy_lock_stateid(dst, state, lockowner);
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ret = nfs4_copy_lock_stateid(dst, state, l_ctx);
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if (ret == -EIO)
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/* A lost lock - don't even consider delegations */
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goto out;
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