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NFS client bugfixes for Linux 4.9

Browse source 
Bugfixes:
 - Trim extra slashes in v4 nfs_paths to fix tools that use this
 - Fix a -Wmaybe-uninitialized warnings
 - Fix suspicious RCU usages
 - Fix Oops when mounting multiple servers at once
 - Suppress a false-positive pNFS error
 - Fix a DMAR failure in NFS over RDMA
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Merge tag 'nfs-for-4.9-3' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client bugfixes from Anna Schumaker:
 "Most of these fix regressions in 4.9, and none are going to stable
  this time around.

  Bugfixes:
   - Trim extra slashes in v4 nfs_paths to fix tools that use this
   - Fix a -Wmaybe-uninitialized warnings
   - Fix suspicious RCU usages
   - Fix Oops when mounting multiple servers at once
   - Suppress a false-positive pNFS error
   - Fix a DMAR failure in NFS over RDMA"

* tag 'nfs-for-4.9-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect
  fs/nfs: Fix used uninitialized warn in nfs4_slot_seqid_in_use()
  NFS: Don't print a pNFS error if we aren't using pNFS
  NFS: Ignore connections that have cl_rpcclient uninitialized
  SUNRPC: Fix suspicious RCU usage
  NFSv4.1: work around -Wmaybe-uninitialized warning
  NFS: Trim extra slash in v4 nfs_path
This commit is contained in:
Linus Torvalds 2016-11-11 09:15:30 -08:00
commit ef5beed998
7 changed files with 41 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

3
fs/nfs/client.c
View file

@ -314,7 +314,8 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat
/* Match the full socket address */
if (!rpc_cmp_addr_port(sap, clap))
/* Match all xprt_switch full socket addresses */
if (!rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
if (IS_ERR(clp->cl_rpcclient) ||
!rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
sap))
continue;

2
fs/nfs/namespace.c
View file

@ -98,7 +98,7 @@ rename_retry:
return end;
}
namelen = strlen(base);
if (flags & NFS_PATH_CANONICAL) {
if (*end == '/') {
/* Strip off excess slashes in base string */
while (namelen > 0 && base[namelen - 1] == '/')
namelen--;

12
fs/nfs/nfs4session.c
View file

@ -178,12 +178,14 @@ static int nfs4_slot_get_seqid(struct nfs4_slot_table *tbl, u32 slotid,
__must_hold(&tbl->slot_tbl_lock)
{
struct nfs4_slot *slot;
int ret;
slot = nfs4_lookup_slot(tbl, slotid);
if (IS_ERR(slot))
return PTR_ERR(slot);
*seq_nr = slot->seq_nr;
return 0;
ret = PTR_ERR_OR_ZERO(slot);
if (!ret)
*seq_nr = slot->seq_nr;
return ret;
}
/*
@ -196,7 +198,7 @@ static int nfs4_slot_get_seqid(struct nfs4_slot_table *tbl, u32 slotid,
static bool nfs4_slot_seqid_in_use(struct nfs4_slot_table *tbl,
u32 slotid, u32 seq_nr)
{
u32 cur_seq;
u32 cur_seq = 0;
bool ret = false;
spin_lock(&tbl->slot_tbl_lock);

2
fs/nfs/pnfs.c
View file

@ -146,6 +146,8 @@ set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh,
u32 id;
int i;
if (fsinfo->nlayouttypes == 0)
goto out_no_driver;
if (!(server->nfs_client->cl_exchange_flags &
(EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) {
printk(KERN_ERR "NFS: %s: cl_exchange_flags 0x%x\n",