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Message-Id: <20200214154854.6746-369-sashal@kernel.org>
Date: Fri, 14 Feb 2020 10:46:01 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Olga Kornievskaia <kolga@...app.com>,
Anna Schumaker <Anna.Schumaker@...app.com>,
Sasha Levin <sashal@...nel.org>, linux-nfs@...r.kernel.org
Subject: [PATCH AUTOSEL 5.5 369/542] NFSv4.x recover from pre-mature loss of openstateid
From: Olga Kornievskaia <kolga@...app.com>
[ Upstream commit d826e5b827641ae1bebb33d23a774f4e9bb8e94f ]
Ever since the commit 0e0cb35b417f, it's possible to lose an open stateid
while retrying a CLOSE due to ERR_OLD_STATEID. Once that happens,
operations that require openstateid fail with EAGAIN which is propagated
to the application then tests like generic/446 and generic/168 fail with
"Resource temporarily unavailable".
Instead of returning this error, initiate state recovery when possible to
recover the open stateid and then try calling nfs4_select_rw_stateid()
again.
Fixes: 0e0cb35b417f ("NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE")
Signed-off-by: Olga Kornievskaia <kolga@...app.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@...app.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
fs/nfs/nfs42proc.c | 36 ++++++++++++++++++++++++++++--------
fs/nfs/nfs4proc.c | 2 ++
fs/nfs/pnfs.c | 2 --
3 files changed, 30 insertions(+), 10 deletions(-)
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 1fe83e0f663e2..9637aad36bdca 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -61,8 +61,11 @@ static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
lock, FMODE_WRITE);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
+ }
res.falloc_fattr = nfs_alloc_fattr();
if (!res.falloc_fattr)
@@ -287,8 +290,11 @@ static ssize_t _nfs42_proc_copy(struct file *src,
} else {
status = nfs4_set_rw_stateid(&args->src_stateid,
src_lock->open_context, src_lock, FMODE_READ);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
+ }
}
status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
pos_src, pos_src + (loff_t)count - 1);
@@ -297,8 +303,11 @@ static ssize_t _nfs42_proc_copy(struct file *src,
status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
dst_lock, FMODE_WRITE);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
+ }
status = nfs_sync_inode(dst_inode);
if (status)
@@ -546,8 +555,11 @@ static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
FMODE_READ);
nfs_put_lock_context(l_ctx);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
+ }
status = nfs4_call_sync(src_server->client, src_server, &msg,
&args->cna_seq_args, &res->cnr_seq_res, 0);
@@ -618,8 +630,11 @@ static loff_t _nfs42_proc_llseek(struct file *filep,
status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
lock, FMODE_READ);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
+ }
status = nfs_filemap_write_and_wait_range(inode->i_mapping,
offset, LLONG_MAX);
@@ -994,13 +1009,18 @@ static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
src_lock, FMODE_READ);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
-
+ }
status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
dst_lock, FMODE_WRITE);
- if (status)
+ if (status) {
+ if (status == -EAGAIN)
+ status = -NFS4ERR_BAD_STATEID;
return status;
+ }
res.dst_fattr = nfs_alloc_fattr();
if (!res.dst_fattr)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 76d37161409a5..f9bb4b43a5192 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3239,6 +3239,8 @@ static int _nfs4_do_setattr(struct inode *inode,
nfs_put_lock_context(l_ctx);
if (status == -EIO)
return -EBADF;
+ else if (status == -EAGAIN)
+ goto zero_stateid;
} else {
zero_stateid:
nfs4_stateid_copy(&arg->stateid, &zero_stateid);
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index cec3070ab577e..3ac6b4dea72d3 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1998,8 +1998,6 @@ pnfs_update_layout(struct inode *ino,
trace_pnfs_update_layout(ino, pos, count,
iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_INVALID_OPEN);
- if (status != -EAGAIN)
- goto out_unlock;
spin_unlock(&ino->i_lock);
nfs4_schedule_stateid_recovery(server, ctx->state);
pnfs_clear_first_layoutget(lo);
--
2.20.1
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