From 7dd7d95916fe7c8494aa8708204d5a2b8689d270 Mon Sep 17 00:00:00 2001
From: Malahal Naineni <malahal@us.ibm.com>
Date: Thu, 23 Jan 2014 08:54:55 -0600
Subject: nfs: handle servers that support only ALLOW ACE type.
Currently we support ACLs if the NFS server file system supports both
ALLOW and DENY ACE types. This patch makes the Linux client work with
ACLs even if the server supports only 'ALLOW' ACE type.
Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4proc.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a1965329a12c..ed10d0d4f860 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2744,7 +2744,8 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f
NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
NFS_CAP_CTIME|NFS_CAP_MTIME|
NFS_CAP_SECURITY_LABEL);
- if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
+ if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
+ res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
server->caps |= NFS_CAP_ACLS;
if (res.has_links != 0)
server->caps |= NFS_CAP_HARDLINKS;
@@ -4321,9 +4322,7 @@ static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
static inline int nfs4_server_supports_acls(struct nfs_server *server)
{
- return (server->caps & NFS_CAP_ACLS)
- && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
- && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
+ return server->caps & NFS_CAP_ACLS;
}
/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
--
cgit v1.2.3-70-g09d2
From d529ef83c355f97027ff85298a9709fe06216a66 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@redhat.com>
Date: Mon, 27 Jan 2014 13:46:15 -0500
Subject: NFS: fix the handling of NFS_INO_INVALID_DATA flag in
nfs_revalidate_mapping
There is a possible race in how the nfs_invalidate_mapping function is
handled. Currently, we go and invalidate the pages in the file and then
clear NFS_INO_INVALID_DATA.
The problem is that it's possible for a stale page to creep into the
mapping after the page was invalidated (i.e., via readahead). If another
writer comes along and sets the flag after that happens but before
invalidate_inode_pages2 returns then we could clear the flag
without the cache having been properly invalidated.
So, we must clear the flag first and then invalidate the pages. Doing
this however, opens another race:
It's possible to have two concurrent read() calls that end up in
nfs_revalidate_mapping at the same time. The first one clears the
NFS_INO_INVALID_DATA flag and then goes to call nfs_invalidate_mapping.
Just before calling that though, the other task races in, checks the
flag and finds it cleared. At that point, it trusts that the mapping is
good and gets the lock on the page, allowing the read() to be satisfied
from the cache even though the data is no longer valid.
These effects are easily manifested by running diotest3 from the LTP
test suite on NFS. That program does a series of DIO writes and buffered
reads. The operations are serialized and page-aligned but the existing
code fails the test since it occasionally allows a read to come out of
the cache incorrectly. While mixing direct and buffered I/O isn't
recommended, I believe it's possible to hit this in other ways that just
use buffered I/O, though that situation is much harder to reproduce.
The problem is that the checking/clearing of that flag and the
invalidation of the mapping really need to be atomic. Fix this by
serializing concurrent invalidations with a bitlock.
At the same time, we also need to allow other places that check
NFS_INO_INVALID_DATA to check whether we might be in the middle of
invalidating the file, so fix up a couple of places that do that
to look for the new NFS_INO_INVALIDATING flag.
Doing this requires us to be careful not to set the bitlock
unnecessarily, so this code only does that if it believes it will
be doing an invalidation.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/dir.c | 3 ++-
fs/nfs/inode.c | 42 ++++++++++++++++++++++++++++++++++++++----
fs/nfs/nfstrace.h | 1 +
fs/nfs/write.c | 6 +++++-
include/linux/nfs_fs.h | 1 +
5 files changed, 47 insertions(+), 6 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index b266f734bd53..b39a0468829b 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -288,7 +288,8 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des
new_pos = desc->current_index + i;
if (ctx->attr_gencount != nfsi->attr_gencount
- || (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))) {
+ || (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
+ || test_bit(NFS_INO_INVALIDATING, &nfsi->flags)) {
ctx->duped = 0;
ctx->attr_gencount = nfsi->attr_gencount;
} else if (new_pos < desc->ctx->pos) {
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c63e15224466..0a972ee9ccc1 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -977,11 +977,11 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map
if (ret < 0)
return ret;
}
- spin_lock(&inode->i_lock);
- nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
- if (S_ISDIR(inode->i_mode))
+ if (S_ISDIR(inode->i_mode)) {
+ spin_lock(&inode->i_lock);
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
- spin_unlock(&inode->i_lock);
+ spin_unlock(&inode->i_lock);
+ }
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
nfs_fscache_wait_on_invalidate(inode);
@@ -1008,6 +1008,7 @@ static bool nfs_mapping_need_revalidate_inode(struct inode *inode)
int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
{
struct nfs_inode *nfsi = NFS_I(inode);
+ unsigned long *bitlock = &nfsi->flags;
int ret = 0;
/* swapfiles are not supposed to be shared. */
@@ -1019,12 +1020,45 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
if (ret < 0)
goto out;
}
+
+ /*
+ * We must clear NFS_INO_INVALID_DATA first to ensure that
+ * invalidations that come in while we're shooting down the mappings
+ * are respected. But, that leaves a race window where one revalidator
+ * can clear the flag, and then another checks it before the mapping
+ * gets invalidated. Fix that by serializing access to this part of
+ * the function.
+ *
+ * At the same time, we need to allow other tasks to see whether we
+ * might be in the middle of invalidating the pages, so we only set
+ * the bit lock here if it looks like we're going to be doing that.
+ */
+ for (;;) {
+ ret = wait_on_bit(bitlock, NFS_INO_INVALIDATING,
+ nfs_wait_bit_killable, TASK_KILLABLE);
+ if (ret)
+ goto out;
+ if (!(nfsi->cache_validity & NFS_INO_INVALID_DATA))
+ goto out;
+ if (!test_and_set_bit_lock(NFS_INO_INVALIDATING, bitlock))
+ break;
+ }
+
+ spin_lock(&inode->i_lock);
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
+ nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
+ spin_unlock(&inode->i_lock);
trace_nfs_invalidate_mapping_enter(inode);
ret = nfs_invalidate_mapping(inode, mapping);
trace_nfs_invalidate_mapping_exit(inode, ret);
+ } else {
+ /* something raced in and cleared the flag */
+ spin_unlock(&inode->i_lock);
}
+ clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
+ smp_mb__after_clear_bit();
+ wake_up_bit(bitlock, NFS_INO_INVALIDATING);
out:
return ret;
}
diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index 89fe741e58b1..59f838cdc009 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -36,6 +36,7 @@
__print_flags(v, "|", \
{ 1 << NFS_INO_ADVISE_RDPLUS, "ADVISE_RDPLUS" }, \
{ 1 << NFS_INO_STALE, "STALE" }, \
+ { 1 << NFS_INO_INVALIDATING, "INVALIDATING" }, \
{ 1 << NFS_INO_FLUSHING, "FLUSHING" }, \
{ 1 << NFS_INO_FSCACHE, "FSCACHE" }, \
{ 1 << NFS_INO_COMMIT, "COMMIT" }, \
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index a44a87268a6e..5511a4247190 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -909,9 +909,13 @@ bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx)
*/
static bool nfs_write_pageuptodate(struct page *page, struct inode *inode)
{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
if (nfs_have_delegated_attributes(inode))
goto out;
- if (NFS_I(inode)->cache_validity & (NFS_INO_INVALID_DATA|NFS_INO_REVAL_PAGECACHE))
+ if (nfsi->cache_validity & (NFS_INO_INVALID_DATA|NFS_INO_REVAL_PAGECACHE))
+ return false;
+ if (test_bit(NFS_INO_INVALIDATING, &nfsi->flags))
return false;
out:
return PageUptodate(page) != 0;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 48997374eaf0..18fb16f4b939 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -215,6 +215,7 @@ struct nfs_inode {
#define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */
#define NFS_INO_STALE (1) /* possible stale inode */
#define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */
+#define NFS_INO_INVALIDATING (3) /* inode is being invalidated */
#define NFS_INO_FLUSHING (4) /* inode is flushing out data */
#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
--
cgit v1.2.3-70-g09d2
From 0ea9de0ea6a4e4a1d343130b2a159b4f986e288e Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@redhat.com>
Date: Mon, 27 Jan 2014 14:53:27 -0500
Subject: sunrpc: turn warn_gssd() log message into a dprintk()
The original printk() made sense when the GSSAPI codepaths were called
only when sec=krb5* was explicitly requested. Now however, in many cases
the nfs client will try to acquire GSSAPI credentials by default, even
when it's not requested.
Since we don't have a great mechanism to distinguish between the two
cases, just turn the pr_warn into a dprintk instead. With this change we
can also get rid of the ratelimiting.
We do need to keep the EXPORT_SYMBOL(gssd_running) in place since
auth_gss.ko needs it and sunrpc.ko provides it. We can however,
eliminate the gssd_running call in the nfs code since that's a bit of a
layering violation.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4client.c | 5 +----
net/sunrpc/auth_gss/auth_gss.c | 8 +-------
2 files changed, 2 insertions(+), 11 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 73d4ecda1e36..dbb3e1f30c68 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -372,10 +372,7 @@ struct nfs_client *nfs4_init_client(struct nfs_client *clp,
__set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
__set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags);
- error = -EINVAL;
- if (gssd_running(clp->cl_net))
- error = nfs_create_rpc_client(clp, timeparms,
- RPC_AUTH_GSS_KRB5I);
+ error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I);
if (error == -EINVAL)
error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
if (error < 0)
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 0a2aee060f9f..6c0513a7f992 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -532,13 +532,7 @@ gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred)
static void warn_gssd(void)
{
- static unsigned long ratelimit;
- unsigned long now = jiffies;
-
- if (time_after(now, ratelimit)) {
- pr_warn("RPC: AUTH_GSS upcall failed. Please check user daemon is running.\n");
- ratelimit = now + 15*HZ;
- }
+ dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n");
}
static inline int
--
cgit v1.2.3-70-g09d2
From 17dfeb9113397a6119091a491ef7182649f0c5a9 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Tue, 28 Jan 2014 09:37:16 -0500
Subject: NFS: Fix races in nfs_revalidate_mapping
Commit d529ef83c355f97027ff85298a9709fe06216a66 (NFS: fix the handling
of NFS_INO_INVALID_DATA flag in nfs_revalidate_mapping) introduces
a potential race, since it doesn't test the value of nfsi->cache_validity
and set the bitlock in nfsi->flags atomically.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: Jeff Layton <jlayton@redhat.com>
---
fs/nfs/inode.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 0a972ee9ccc1..e5070aa5f175 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1038,24 +1038,24 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
nfs_wait_bit_killable, TASK_KILLABLE);
if (ret)
goto out;
- if (!(nfsi->cache_validity & NFS_INO_INVALID_DATA))
- goto out;
- if (!test_and_set_bit_lock(NFS_INO_INVALIDATING, bitlock))
+ spin_lock(&inode->i_lock);
+ if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
+ spin_unlock(&inode->i_lock);
+ continue;
+ }
+ if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
break;
- }
-
- spin_lock(&inode->i_lock);
- if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
- nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
- spin_unlock(&inode->i_lock);
- trace_nfs_invalidate_mapping_enter(inode);
- ret = nfs_invalidate_mapping(inode, mapping);
- trace_nfs_invalidate_mapping_exit(inode, ret);
- } else {
- /* something raced in and cleared the flag */
spin_unlock(&inode->i_lock);
+ goto out;
}
+ set_bit(NFS_INO_INVALIDATING, bitlock);
+ nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
+ spin_unlock(&inode->i_lock);
+ trace_nfs_invalidate_mapping_enter(inode);
+ ret = nfs_invalidate_mapping(inode, mapping);
+ trace_nfs_invalidate_mapping_exit(inode, ret);
+
clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
smp_mb__after_clear_bit();
wake_up_bit(bitlock, NFS_INO_INVALIDATING);
--
cgit v1.2.3-70-g09d2
From 4db72b40fdbc706f8957e9773ae73b1574b8c694 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@redhat.com>
Date: Tue, 28 Jan 2014 13:47:46 -0500
Subject: nfs: add memory barriers around NFS_INO_INVALID_DATA and
NFS_INO_INVALIDATING
If the setting of NFS_INO_INVALIDATING gets reordered to before the
clearing of NFS_INO_INVALID_DATA, then another task may hit a race
window where both appear to be clear, even though the inode's pages are
still in need of invalidation. Fix this by adding the appropriate memory
barriers.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/dir.c | 14 +++++++++++---
fs/nfs/inode.c | 1 +
fs/nfs/write.c | 1 +
3 files changed, 13 insertions(+), 3 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index b39a0468829b..be38b573495a 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -274,6 +274,15 @@ out_eof:
return -EBADCOOKIE;
}
+static bool
+nfs_readdir_inode_mapping_valid(struct nfs_inode *nfsi)
+{
+ if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
+ return false;
+ smp_rmb();
+ return !test_bit(NFS_INO_INVALIDATING, &nfsi->flags);
+}
+
static
int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc)
{
@@ -287,9 +296,8 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des
struct nfs_open_dir_context *ctx = desc->file->private_data;
new_pos = desc->current_index + i;
- if (ctx->attr_gencount != nfsi->attr_gencount
- || (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
- || test_bit(NFS_INO_INVALIDATING, &nfsi->flags)) {
+ if (ctx->attr_gencount != nfsi->attr_gencount ||
+ !nfs_readdir_inode_mapping_valid(nfsi)) {
ctx->duped = 0;
ctx->attr_gencount = nfsi->attr_gencount;
} else if (new_pos < desc->ctx->pos) {
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index e5070aa5f175..02e185168602 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1050,6 +1050,7 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
}
set_bit(NFS_INO_INVALIDATING, bitlock);
+ smp_wmb();
nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
spin_unlock(&inode->i_lock);
trace_nfs_invalidate_mapping_enter(inode);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 5511a4247190..9a3b6a4cd6b9 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -915,6 +915,7 @@ static bool nfs_write_pageuptodate(struct page *page, struct inode *inode)
goto out;
if (nfsi->cache_validity & (NFS_INO_INVALID_DATA|NFS_INO_REVAL_PAGECACHE))
return false;
+ smp_rmb();
if (test_bit(NFS_INO_INVALIDATING, &nfsi->flags))
return false;
out:
--
cgit v1.2.3-70-g09d2
From f9c96fcc501a43dbc292b17fc0ded4b54e63b79d Mon Sep 17 00:00:00 2001
From: Andy Adamson <andros@netapp.com>
Date: Wed, 29 Jan 2014 11:34:38 -0500
Subject: NFSv4.1 free slot before resending I/O to MDS
Fix a dynamic session slot leak where a slot is preallocated and I/O is
resent through the MDS.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4_fs.h | 1 +
fs/nfs/nfs4filelayout.c | 10 ++++++++--
fs/nfs/nfs4proc.c | 3 ++-
3 files changed, 11 insertions(+), 3 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 5609edc742a0..a5b27c2d9689 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -270,6 +270,7 @@ static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *ser
extern int nfs41_setup_sequence(struct nfs4_session *session,
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
struct rpc_task *task);
+extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *);
extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *);
extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *);
extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 03fd8be8c0c5..20a56fa271bd 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -335,8 +335,11 @@ static void filelayout_read_call_done(struct rpc_task *task, void *data)
dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
if (test_bit(NFS_IOHDR_REDO, &rdata->header->flags) &&
- task->tk_status == 0)
+ task->tk_status == 0) {
+ if (rdata->res.seq_res.sr_slot != NULL)
+ nfs41_sequence_done(task, &rdata->res.seq_res);
return;
+ }
/* Note this may cause RPC to be resent */
rdata->header->mds_ops->rpc_call_done(task, data);
@@ -442,8 +445,11 @@ static void filelayout_write_call_done(struct rpc_task *task, void *data)
struct nfs_write_data *wdata = data;
if (test_bit(NFS_IOHDR_REDO, &wdata->header->flags) &&
- task->tk_status == 0)
+ task->tk_status == 0) {
+ if (wdata->res.seq_res.sr_slot != NULL)
+ nfs41_sequence_done(task, &wdata->res.seq_res);
return;
+ }
/* Note this may cause RPC to be resent */
wdata->header->mds_ops->rpc_call_done(task, data);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ed10d0d4f860..ae00c3ed733f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -592,7 +592,7 @@ out_unlock:
nfs41_server_notify_highest_slotid_update(session->clp);
}
-static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
+int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
{
struct nfs4_session *session;
struct nfs4_slot *slot;
@@ -692,6 +692,7 @@ out_retry:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
return 0;
}
+EXPORT_SYMBOL_GPL(nfs41_sequence_done);
static int nfs4_sequence_done(struct rpc_task *task,
struct nfs4_sequence_res *res)
--
cgit v1.2.3-70-g09d2
From cab92c19821a814ecf5a5279e2699bf28e66caee Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Wed, 29 Jan 2014 12:12:15 -0500
Subject: NFSv4: Fix a slot leak in nfs40_sequence_done
The check for whether or not we sent an RPC call in nfs40_sequence_done
is insufficient to decide whether or not we are holding a session slot,
and thus should not be used to decide when to free that slot.
This patch replaces the RPC_WAS_SENT() test with the correct test for
whether or not slot == NULL.
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@vger.kernel.org # 3.12+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4proc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ae00c3ed733f..493e9cce1f11 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -539,7 +539,7 @@ static int nfs40_sequence_done(struct rpc_task *task,
struct nfs4_slot *slot = res->sr_slot;
struct nfs4_slot_table *tbl;
- if (!RPC_WAS_SENT(task))
+ if (slot == NULL)
goto out;
tbl = slot->table;
--
cgit v1.2.3-70-g09d2
From a13ce7c629366880c1072d4d113d3dab6c53510d Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Wed, 29 Jan 2014 12:24:03 -0500
Subject: NFSv4.1: Clean up nfs41_sequence_done
Move the test for res->sr_slot == NULL out of the nfs41_sequence_free_slot
helper and into the main function for efficiency.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4proc.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 493e9cce1f11..42da6af77587 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -559,15 +559,10 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
{
struct nfs4_session *session;
struct nfs4_slot_table *tbl;
+ struct nfs4_slot *slot = res->sr_slot;
bool send_new_highest_used_slotid = false;
- if (!res->sr_slot) {
- /* just wake up the next guy waiting since
- * we may have not consumed a slot after all */
- dprintk("%s: No slot\n", __func__);
- return;
- }
- tbl = res->sr_slot->table;
+ tbl = slot->table;
session = tbl->session;
spin_lock(&tbl->slot_tbl_lock);
@@ -577,11 +572,11 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
if (tbl->highest_used_slotid > tbl->target_highest_slotid)
send_new_highest_used_slotid = true;
- if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
+ if (nfs41_wake_and_assign_slot(tbl, slot)) {
send_new_highest_used_slotid = false;
goto out_unlock;
}
- nfs4_free_slot(tbl, res->sr_slot);
+ nfs4_free_slot(tbl, slot);
if (tbl->highest_used_slotid != NFS4_NO_SLOT)
send_new_highest_used_slotid = false;
@@ -595,16 +590,17 @@ out_unlock:
int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
{
struct nfs4_session *session;
- struct nfs4_slot *slot;
+ struct nfs4_slot *slot = res->sr_slot;
struct nfs_client *clp;
bool interrupted = false;
int ret = 1;
+ if (slot == NULL)
+ goto out_noaction;
/* don't increment the sequence number if the task wasn't sent */
if (!RPC_WAS_SENT(task))
goto out;
- slot = res->sr_slot;
session = slot->table->session;
if (slot->interrupted) {
@@ -679,6 +675,7 @@ out:
/* The session may be reset by one of the error handlers. */
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
nfs41_sequence_free_slot(res);
+out_noaction:
return ret;
retry_nowait:
if (rpc_restart_call_prepare(task)) {
--
cgit v1.2.3-70-g09d2
From 905e7dafbe1c69dd69197a9e8ba2e4bf518c9926 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Wed, 29 Jan 2014 12:26:57 -0500
Subject: NFSv4.1: Cleanup
It is now completely safe to call nfs41_sequence_free_slot with a NULL
slot.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4filelayout.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 20a56fa271bd..12c8132ad408 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -336,8 +336,7 @@ static void filelayout_read_call_done(struct rpc_task *task, void *data)
if (test_bit(NFS_IOHDR_REDO, &rdata->header->flags) &&
task->tk_status == 0) {
- if (rdata->res.seq_res.sr_slot != NULL)
- nfs41_sequence_done(task, &rdata->res.seq_res);
+ nfs41_sequence_done(task, &rdata->res.seq_res);
return;
}
@@ -446,8 +445,7 @@ static void filelayout_write_call_done(struct rpc_task *task, void *data)
if (test_bit(NFS_IOHDR_REDO, &wdata->header->flags) &&
task->tk_status == 0) {
- if (wdata->res.seq_res.sr_slot != NULL)
- nfs41_sequence_done(task, &wdata->res.seq_res);
+ nfs41_sequence_done(task, &wdata->res.seq_res);
return;
}
--
cgit v1.2.3-70-g09d2
From a1800acaf7d1c2bf6d68b9a8f4ab8560cc66555a Mon Sep 17 00:00:00 2001
From: Malahal Naineni <malahal@us.ibm.com>
Date: Mon, 27 Jan 2014 15:31:09 -0600
Subject: nfs: initialize the ACL support bits to zero.
Avoid returning incorrect acl mask attributes when the server doesn't
support ACLs.
Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4xdr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs/nfs')
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 8c21d69a9dc1..72f3bf1754ef 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3449,7 +3449,7 @@ static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint
{
__be32 *p;
- *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
+ *res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
--
cgit v1.2.3-70-g09d2