Commit 2300fd67 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'nfs-for-3.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs 

Pull NFS client bugfixes from Trond Myklebust:
 - Fix NFSv4 infinite loops on open(O_TRUNC)
 - Fix an Oops and an infinite loop in the NFSv4 flock code
 - Don't register the PipeFS filesystem until it has been set up
 - Fix an Oops in nfs_try_to_update_request
 - Don't reuse NFSv4 open owners: fixes a bad sequence id storm.

* tag 'nfs-for-3.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Keep dropped state owners on the LRU list for a while
  NFSv4: Ensure that we don't drop a state owner more than once
  NFSv4: Ensure we do not reuse open owner names
  nfs: Enclose hostname in brackets when needed in nfs_do_root_mount
  NFS: put open context on error in nfs_flush_multi
  NFS: put open context on error in nfs_pagein_multi
  NFSv4: Fix open(O_TRUNC) and ftruncate() error handling
  NFSv4: Ensure that we check lock exclusive/shared type against open modes
  NFSv4: Ensure that the LOCK code sets exception->inode
  NFS: check for req==NULL in nfs_try_to_update_request cleanup
  SUNRPC: register PipeFS file system after pernet sybsystem
parents 86ec090e 7bf97bc2

fs/nfs/dir.c

+2 −2
Original line number Diff line number Diff line
@@ -1429,7 +1429,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry 
	}



	open_flags = nd->intent.open.flags;

	attr.ia_valid = 0;

	attr.ia_valid = ATTR_OPEN;



	ctx = create_nfs_open_context(dentry, open_flags);

	res = ERR_CAST(ctx);
@@ -1536,7 +1536,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) 
	if (IS_ERR(ctx))

		goto out;



	attr.ia_valid = 0;

	attr.ia_valid = ATTR_OPEN;

	if (openflags & O_TRUNC) {

		attr.ia_valid |= ATTR_SIZE;

		attr.ia_size = 0;

fs/nfs/nfs4_fs.h

+1 −0
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ struct nfs_unique_id { 


#define NFS_SEQID_CONFIRMED 1

struct nfs_seqid_counter {

	ktime_t create_time;

	int owner_id;

	int flags;

	u32 counter;

fs/nfs/nfs4proc.c

+36 −8
Original line number Diff line number Diff line
@@ -838,7 +838,8 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 
	p->o_arg.open_flags = flags;

	p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);

	p->o_arg.clientid = server->nfs_client->cl_clientid;

	p->o_arg.id = sp->so_seqid.owner_id;

	p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);

	p->o_arg.id.uniquifier = sp->so_seqid.owner_id;

	p->o_arg.name = &dentry->d_name;

	p->o_arg.server = server;

	p->o_arg.bitmask = server->attr_bitmask;
@@ -1466,8 +1467,7 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 
			goto unlock_no_action;

		rcu_read_unlock();

	}

	/* Update sequence id. */

	data->o_arg.id = sp->so_seqid.owner_id;

	/* Update client id. */

	data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;

	if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {

		task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
@@ -1954,10 +1954,19 @@ static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 
	};

	int err;

	do {

		err = nfs4_handle_exception(server,

				_nfs4_do_setattr(inode, cred, fattr, sattr, state),

				&exception);

		err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);

		switch (err) {

		case -NFS4ERR_OPENMODE:

			if (state && !(state->state & FMODE_WRITE)) {

				err = -EBADF;

				if (sattr->ia_valid & ATTR_OPEN)

					err = -EACCES;

				goto out;

			}

		}

		err = nfs4_handle_exception(server, err, &exception);

	} while (exception.retry);

out:

	return err;

}
@@ -4558,7 +4567,9 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f 
static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)

{

	struct nfs_server *server = NFS_SERVER(state->inode);

	struct nfs4_exception exception = { };

	struct nfs4_exception exception = {

		.inode = state->inode,

	};

	int err;



	do {
@@ -4576,7 +4587,9 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request 
static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)

{

	struct nfs_server *server = NFS_SERVER(state->inode);

	struct nfs4_exception exception = { };

	struct nfs4_exception exception = {

		.inode = state->inode,

	};

	int err;



	err = nfs4_set_lock_state(state, request);
@@ -4676,6 +4689,7 @@ static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock * 
{

	struct nfs4_exception exception = {

		.state = state,

		.inode = state->inode,

	};

	int err;
@@ -4721,6 +4735,20 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 


	if (state == NULL)

		return -ENOLCK;

	/*

	 * Don't rely on the VFS having checked the file open mode,

	 * since it won't do this for flock() locks.

	 */

	switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {

	case F_RDLCK:

		if (!(filp->f_mode & FMODE_READ))

			return -EBADF;

		break;

	case F_WRLCK:

		if (!(filp->f_mode & FMODE_WRITE))

			return -EBADF;

	}



	do {

		status = nfs4_proc_setlk(state, cmd, request);

		if ((status != -EAGAIN) || IS_SETLK(cmd))

fs/nfs/nfs4state.c

+19 −12
Original line number Diff line number Diff line
@@ -393,6 +393,7 @@ nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) 
static void

nfs4_init_seqid_counter(struct nfs_seqid_counter *sc)

{

	sc->create_time = ktime_get();

	sc->flags = 0;

	sc->counter = 0;

	spin_lock_init(&sc->lock);
@@ -434,13 +435,17 @@ nfs4_alloc_state_owner(struct nfs_server *server, 
static void

nfs4_drop_state_owner(struct nfs4_state_owner *sp)

{

	if (!RB_EMPTY_NODE(&sp->so_server_node)) {

	struct rb_node *rb_node = &sp->so_server_node;



	if (!RB_EMPTY_NODE(rb_node)) {

		struct nfs_server *server = sp->so_server;

		struct nfs_client *clp = server->nfs_client;



		spin_lock(&clp->cl_lock);

		rb_erase(&sp->so_server_node, &server->state_owners);

		RB_CLEAR_NODE(&sp->so_server_node);

		if (!RB_EMPTY_NODE(rb_node)) {

			rb_erase(rb_node, &server->state_owners);

			RB_CLEAR_NODE(rb_node);

		}

		spin_unlock(&clp->cl_lock);

	}

}
@@ -516,6 +521,14 @@ out: 
/**

 * nfs4_put_state_owner - Release a nfs4_state_owner

 * @sp: state owner data to release

 *

 * Note that we keep released state owners on an LRU

 * list.

 * This caches valid state owners so that they can be

 * reused, to avoid the OPEN_CONFIRM on minor version 0.

 * It also pins the uniquifier of dropped state owners for

 * a while, to ensure that those state owner names are

 * never reused.

 */

void nfs4_put_state_owner(struct nfs4_state_owner *sp)

{
@@ -525,15 +538,9 @@ void nfs4_put_state_owner(struct nfs4_state_owner *sp) 
	if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))

		return;



	if (!RB_EMPTY_NODE(&sp->so_server_node)) {

	sp->so_expires = jiffies;

	list_add_tail(&sp->so_lru, &server->state_owners_lru);

	spin_unlock(&clp->cl_lock);

	} else {

		nfs4_remove_state_owner_locked(sp);

		spin_unlock(&clp->cl_lock);

		nfs4_free_state_owner(sp);

	}

}



/**

fs/nfs/nfs4xdr.c

+5 −4
Original line number Diff line number Diff line
@@ -74,7 +74,7 @@ static int nfs4_stat_to_errno(int); 
/* lock,open owner id:

 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)

 */

#define open_owner_id_maxsz	(1 + 1 + 4)

#define open_owner_id_maxsz	(1 + 2 + 1 + 1 + 2)

#define lock_owner_id_maxsz	(1 + 1 + 4)

#define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))

#define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
@@ -1340,12 +1340,13 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena 
 */

	encode_nfs4_seqid(xdr, arg->seqid);

	encode_share_access(xdr, arg->fmode);

	p = reserve_space(xdr, 32);

	p = reserve_space(xdr, 36);

	p = xdr_encode_hyper(p, arg->clientid);

	*p++ = cpu_to_be32(20);

	*p++ = cpu_to_be32(24);

	p = xdr_encode_opaque_fixed(p, "open id:", 8);

	*p++ = cpu_to_be32(arg->server->s_dev);

	xdr_encode_hyper(p, arg->id);

	*p++ = cpu_to_be32(arg->id.uniquifier);

	xdr_encode_hyper(p, arg->id.create_time);

}



static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)

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