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Commit 673fdfe3 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'nfs-for-3.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs 

Pull NFS client bugfixes:
 - Stable fix for data corruption when retransmitting O_DIRECT writes
 - Stable fix for a deep recursion/stack overflow bug in rpc_release_client
 - Stable fix for infinite looping when mounting a NFSv4.x volume
 - Fix a typo in the nfs mount option parser
 - Allow pNFS layouts to be compiled into the kernel when NFSv4.1 is

* tag 'nfs-for-3.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: fix pnfs Kconfig defaults
  NFS: correctly report misuse of "migration" mount option.
  nfs: don't retry detect_trunking with RPC_AUTH_UNIX more than once
  SUNRPC: Avoid deep recursion in rpc_release_client
  SUNRPC: Fix a data corruption issue when retransmitting RPC calls
parents 73d75ba9 8c2fabc6

fs/nfs/Kconfig

+3 −3
Original line number Diff line number Diff line
@@ -116,17 +116,17 @@ config NFS_V4_2 
config PNFS_FILE_LAYOUT

	tristate

	depends on NFS_V4_1

	default m

	default NFS_V4



config PNFS_BLOCK

	tristate

	depends on NFS_V4_1 && BLK_DEV_DM

	default m

	default NFS_V4



config PNFS_OBJLAYOUT

	tristate

	depends on NFS_V4_1 && SCSI_OSD_ULD

	default m

	default NFS_V4



config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN

	string "NFSv4.1 Implementation ID Domain"

fs/nfs/nfs4state.c

+6 −1
Original line number Diff line number Diff line
@@ -2093,10 +2093,15 @@ again: 
			nfs4_root_machine_cred(clp);

			goto again;

		}

		if (i > 2)

		if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX)

			break;

	case -NFS4ERR_CLID_INUSE:

	case -NFS4ERR_WRONGSEC:

		/* No point in retrying if we already used RPC_AUTH_UNIX */

		if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) {

			status = -EPERM;

			break;

		}

		clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX);

		if (IS_ERR(clnt)) {

			status = PTR_ERR(clnt);

fs/nfs/super.c

+1 −1
Original line number Diff line number Diff line
@@ -1614,7 +1614,7 @@ static int nfs_parse_mount_options(char *raw, 
		goto out_minorversion_mismatch;



	if (mnt->options & NFS_OPTION_MIGRATION &&

	    mnt->version != 4 && mnt->minorversion != 0)

	    (mnt->version != 4 || mnt->minorversion != 0))

		goto out_migration_misuse;



	/*

net/sunrpc/clnt.c

+17 −12
Original line number Diff line number Diff line
@@ -750,14 +750,16 @@ EXPORT_SYMBOL_GPL(rpc_shutdown_client); 
/*

 * Free an RPC client

 */

static void

static struct rpc_clnt *

rpc_free_client(struct rpc_clnt *clnt)

{

	struct rpc_clnt *parent = NULL;



	dprintk_rcu("RPC:       destroying %s client for %s\n",

			clnt->cl_program->name,

			rcu_dereference(clnt->cl_xprt)->servername);

	if (clnt->cl_parent != clnt)

		rpc_release_client(clnt->cl_parent);

		parent = clnt->cl_parent;

	rpc_clnt_remove_pipedir(clnt);

	rpc_unregister_client(clnt);

	rpc_free_iostats(clnt->cl_metrics);
@@ -766,18 +768,17 @@ rpc_free_client(struct rpc_clnt *clnt) 
	rpciod_down();

	rpc_free_clid(clnt);

	kfree(clnt);

	return parent;

}



/*

 * Free an RPC client

 */

static void

static struct rpc_clnt * 

rpc_free_auth(struct rpc_clnt *clnt)

{

	if (clnt->cl_auth == NULL) {

		rpc_free_client(clnt);

		return;

	}

	if (clnt->cl_auth == NULL)

		return rpc_free_client(clnt);



	/*

	 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to
@@ -788,7 +789,8 @@ rpc_free_auth(struct rpc_clnt *clnt) 
	rpcauth_release(clnt->cl_auth);

	clnt->cl_auth = NULL;

	if (atomic_dec_and_test(&clnt->cl_count))

		rpc_free_client(clnt);

		return rpc_free_client(clnt);

	return NULL;

}



/*
@@ -799,10 +801,13 @@ rpc_release_client(struct rpc_clnt *clnt) 
{

	dprintk("RPC:       rpc_release_client(%p)\n", clnt);



	do {

		if (list_empty(&clnt->cl_tasks))

			wake_up(&destroy_wait);

	if (atomic_dec_and_test(&clnt->cl_count))

		rpc_free_auth(clnt);

		if (!atomic_dec_and_test(&clnt->cl_count))

			break;

		clnt = rpc_free_auth(clnt);

	} while (clnt != NULL);

}

EXPORT_SYMBOL_GPL(rpc_release_client);

net/sunrpc/xprtsock.c

+21 −7
Original line number Diff line number Diff line
@@ -393,8 +393,10 @@ static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, 
	return kernel_sendmsg(sock, &msg, NULL, 0, 0);

}



static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more)

static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more, bool zerocopy)

{

	ssize_t (*do_sendpage)(struct socket *sock, struct page *page,

			int offset, size_t size, int flags);

	struct page **ppage;

	unsigned int remainder;

	int err, sent = 0;
@@ -403,6 +405,9 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i 
	base += xdr->page_base;

	ppage = xdr->pages + (base >> PAGE_SHIFT);

	base &= ~PAGE_MASK;

	do_sendpage = sock->ops->sendpage;

	if (!zerocopy)

		do_sendpage = sock_no_sendpage;

	for(;;) {

		unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder);

		int flags = XS_SENDMSG_FLAGS;
@@ -410,7 +415,7 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i 
		remainder -= len;

		if (remainder != 0 || more)

			flags |= MSG_MORE;

		err = sock->ops->sendpage(sock, *ppage, base, len, flags);

		err = do_sendpage(sock, *ppage, base, len, flags);

		if (remainder == 0 || err != len)

			break;

		sent += err;
@@ -431,9 +436,10 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i 
 * @addrlen: UDP only -- length of destination address

 * @xdr: buffer containing this request

 * @base: starting position in the buffer

 * @zerocopy: true if it is safe to use sendpage()

 *

 */

static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base)

static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, bool zerocopy)

{

	unsigned int remainder = xdr->len - base;

	int err, sent = 0;
@@ -461,7 +467,7 @@ static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, 
	if (base < xdr->page_len) {

		unsigned int len = xdr->page_len - base;

		remainder -= len;

		err = xs_send_pagedata(sock, xdr, base, remainder != 0);

		err = xs_send_pagedata(sock, xdr, base, remainder != 0, zerocopy);

		if (remainder == 0 || err != len)

			goto out;

		sent += err;
@@ -564,7 +570,7 @@ static int xs_local_send_request(struct rpc_task *task) 
			req->rq_svec->iov_base, req->rq_svec->iov_len);



	status = xs_sendpages(transport->sock, NULL, 0,

						xdr, req->rq_bytes_sent);

						xdr, req->rq_bytes_sent, true);

	dprintk("RPC:       %s(%u) = %d\n",

			__func__, xdr->len - req->rq_bytes_sent, status);

	if (likely(status >= 0)) {
@@ -620,7 +626,7 @@ static int xs_udp_send_request(struct rpc_task *task) 
	status = xs_sendpages(transport->sock,

			      xs_addr(xprt),

			      xprt->addrlen, xdr,

			      req->rq_bytes_sent);

			      req->rq_bytes_sent, true);



	dprintk("RPC:       xs_udp_send_request(%u) = %d\n",

			xdr->len - req->rq_bytes_sent, status);
@@ -693,6 +699,7 @@ static int xs_tcp_send_request(struct rpc_task *task) 
	struct rpc_xprt *xprt = req->rq_xprt;

	struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);

	struct xdr_buf *xdr = &req->rq_snd_buf;

	bool zerocopy = true;

	int status;



	xs_encode_stream_record_marker(&req->rq_snd_buf);
@@ -700,13 +707,20 @@ static int xs_tcp_send_request(struct rpc_task *task) 
	xs_pktdump("packet data:",

				req->rq_svec->iov_base,

				req->rq_svec->iov_len);

	/* Don't use zero copy if this is a resend. If the RPC call

	 * completes while the socket holds a reference to the pages,

	 * then we may end up resending corrupted data.

	 */

	if (task->tk_flags & RPC_TASK_SENT)

		zerocopy = false;



	/* Continue transmitting the packet/record. We must be careful

	 * to cope with writespace callbacks arriving _after_ we have

	 * called sendmsg(). */

	while (1) {

		status = xs_sendpages(transport->sock,

					NULL, 0, xdr, req->rq_bytes_sent);

					NULL, 0, xdr, req->rq_bytes_sent,

					zerocopy);



		dprintk("RPC:       xs_tcp_send_request(%u) = %d\n",

				xdr->len - req->rq_bytes_sent, status);