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kernel_optimize_test/fs/nfs
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Trond Myklebust 8acc3e228e pNFS: Avoid a live lock condition in pnfs_update_layout() 
[ Upstream commit 880265c77ac415090090d1fe72a188fee71cb458 ]

If we're about to send the first layoutget for an empty layout, we want
to make sure that we drain out the existing pending layoutget calls
first. The reason is that these layouts may have been already implicitly
returned to the server by a recall to which the client gave a
NFS4ERR_NOMATCHING_LAYOUT response.

The problem is that wait_var_event_killable() could in principle see the
plh_outstanding count go back to '1' when the first process to wake up
starts sending a new layoutget. If it fails to get a layout, then this
loop can continue ad infinitum...

Fixes: 0b77f97a7e42 ("NFSv4/pnfs: Fix layoutget behaviour after invalidation")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-22 14:13:16 +02:00
..
blocklayout treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
filelayout NFS: fix an incorrect limit in filelayout_decode_layout() 2021-06-03 09:00:35 +02:00
flexfilelayout pnfs/flexfiles: Fix misplaced barrier in nfs4_ff_layout_prepare_ds 2021-11-18 14:04:22 +01:00
cache_lib.c NFS client updates for Linux 4.15 2017-11-17 14:18:00 -08:00
cache_lib.h NFS client updates for Linux 4.15 2017-11-17 14:18:00 -08:00
callback_proc.c pNFS: Avoid a live lock condition in pnfs_update_layout() 2022-06-22 14:13:16 +02:00
callback_xdr.c NFS: remove unneeded check in decode_devicenotify_args() 2022-04-08 14:40:27 +02:00
callback.c SUNRPC: Cache the process user cred in the RPC server listener 2019-04-24 09:46:35 -04:00
callback.h NFSv4.1: Fix uninitialised variable in devicenotify 2022-02-16 12:54:18 +01:00
client.c NFS: Fix initialisation of nfs_client cl_flags field 2022-02-16 12:54:17 +01:00
delegation.c NFSv4: Fix delegation return in cases where we have to retry 2021-07-20 16:05:47 +02:00
delegation.h NFSv4: Fix delegation return in cases where we have to retry 2021-07-20 16:05:47 +02:00
dir.c NFSv4: fix open failure with O_ACCMODE flag 2022-04-13 21:01:04 +02:00
direct.c NFS: swap-out must always use STABLE writes. 2022-04-13 21:01:02 +02:00
dns_resolve.c NFS: remove duplicate headers 2020-05-27 10:10:12 -04:00
dns_resolve.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
export.c NFS: Add a tracepoint in nfs_fh_to_dentry() 2019-11-03 21:28:46 -05:00
file.c NFS: Do not report flush errors in nfs_write_end() 2022-06-09 10:21:19 +02:00
fs_context.c nfs: fix broken handling of the softreval mount option 2022-05-18 10:23:43 +02:00
fscache-index.c nfs: fscache: use timespec64 in inode auxdata 2020-01-15 10:54:30 -05:00
fscache.c NFSv4: Fix fscache cookie aux_data to ensure change_attr is included 2020-05-08 22:20:24 +01:00
fscache.h nfs: fscache: use timespec64 in inode auxdata 2020-01-15 10:54:30 -05:00
getroot.c NFS: Ensure security label is set for root inode 2020-03-30 19:56:50 -04:00
inode.c Revert "NFSv4: Handle the special Linux file open access mode" 2022-04-13 21:01:04 +02:00
internal.h NFS: Memory allocation failures are not server fatal errors 2022-06-06 08:42:44 +02:00
io.c NFS: Fix up documentation warnings 2019-02-20 15:14:21 -05:00
iostat.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig nfs: fix PNFS_FLEXFILE_LAYOUT Kconfig default 2021-03-30 14:31:49 +02:00
Makefile NFSv4.2: add client side xattr caching. 2020-07-13 17:52:46 -04:00
mount_clnt.c NFSv3: fix rpc receive buffer size for MOUNT call 2020-05-14 18:42:44 -04:00
namespace.c NFS: fix nfs_path in case of a rename retry 2020-10-06 10:21:18 -04:00
netns.h NFS: Add sysfs support for per-container identifier 2019-07-06 14:54:49 -04:00
nfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nfs2super.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nfs2xdr.c NFS: Return valid errors from nfs2/3_decode_dirent() 2022-04-08 14:40:25 +02:00
nfs3_fs.h NFS: Additional refactoring for fs_context conversion 2020-01-15 10:15:17 -05:00
nfs3acl.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfs3client.c NFS: Additional refactoring for fs_context conversion 2020-01-15 10:15:17 -05:00
nfs3proc.c nfs: fix acl memory leak of posix_acl_create() 2021-07-20 16:05:51 +02:00
nfs3super.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nfs3xdr.c NFS: Return valid errors from nfs2/3_decode_dirent() 2022-04-08 14:40:25 +02:00
nfs4_fs.h NFSv4 handle port presence in fs_location server string 2022-02-16 12:54:18 +01:00
nfs4client.c nfs: nfs4clinet: check the return value of kstrdup() 2022-02-16 12:54:18 +01:00
nfs4file.c NFSv4: fix open failure with O_ACCMODE flag 2022-04-13 21:01:04 +02:00
nfs4getroot.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nfs4idmap.c Fix user namespace leak 2021-11-18 14:04:23 +01:00
nfs4idmap.h NFS: Move nfs_idmap.h into fs/nfs/ 2015-04-23 15:16:14 -04:00
nfs4namespace.c NFSv4 handle port presence in fs_location server string 2022-02-16 12:54:18 +01:00
nfs4proc.c NFSv4: Don't hold the layoutget locks across multiple RPC calls 2022-06-14 18:32:38 +02:00
nfs4renewd.c NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals 2020-02-04 12:27:55 -05:00
nfs4session.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
nfs4session.h NFSv4.1: Bump the default callback session slot count to 16 2019-03-02 16:25:26 -05:00
nfs4state.c NFSv4: Protect the state recovery thread against direct reclaim 2022-04-13 21:01:01 +02:00
nfs4super.c NFS: Adjust fs_context error logging 2021-01-19 18:27:30 +01:00
nfs4sysctl.c nfs: Do not convert nfs_idmap_cache_timeout to jiffies 2018-01-18 15:10:47 -05:00
nfs4trace.c pNFS/flexfiles: Add tracing for layout errors 2020-01-15 10:54:33 -05:00
nfs4trace.h NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE 2020-10-02 08:43:09 -04:00
nfs4xdr.c NFSv4 remove zero number of fs_locations entries error check 2022-02-16 12:54:18 +01:00
nfs42.h NFSv4.2: add the extended attribute proc functions. 2020-07-13 17:52:45 -04:00
nfs42proc.c NFSv4.2: fix reference count leaks in _nfs42_proc_copy_notify() 2022-04-13 21:01:01 +02:00
nfs42xattr.c NFSv4.2: fix failure to unregister shrinker 2020-11-12 10:40:02 -05:00
nfs42xdr.c NFSv42: Don't fail clone() unless the OP_CLONE operation failed 2021-12-01 09:19:03 +01:00
nfsroot.c nfsroot: Default mount option should ask for built-in NFS version 2020-11-02 10:29:03 -05:00
nfstrace.c NFS: Add trace events to report non-zero NFS status codes 2019-02-13 12:03:21 -05:00
nfstrace.h nfs: define and use the NFS_INO_INVALID_XATTR flag 2020-07-13 17:52:45 -04:00
pagelist.c NFS: Avoid writeback threads getting stuck in mempool_alloc() 2022-04-13 21:01:03 +02:00
pnfs_dev.c NFS/flexfiles: Speed up read failover when DSes are down 2019-03-01 22:37:38 -05:00
pnfs_nfs.c NFS: nfsiod should not block forever in mempool_alloc() 2022-04-13 21:01:03 +02:00
pnfs.c pNFS: Avoid a live lock condition in pnfs_update_layout() 2022-06-22 14:13:16 +02:00
pnfs.h pNFS: Avoid a live lock condition in pnfs_update_layout() 2022-06-22 14:13:16 +02:00
proc.c NFS: Add softreval behaviour to nfs_lookup_revalidate() 2020-01-24 16:51:13 -05:00
read.c NFS: Trace short NFS READs 2020-06-11 13:33:48 -04:00
super.c The one new feature this time, from Anna Schumaker, is READ_PLUS, which 2020-10-22 09:44:27 -07:00
symlink.c nfs: pass the correct prototype to read_cache_page 2019-05-09 16:26:57 -04:00
sysctl.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sysfs.c NFSv4: Fix up RCU annotations for struct nfs_netns_client 2020-10-15 13:31:08 -04:00
sysfs.h NFSv4: Fix up RCU annotations for struct nfs_netns_client 2020-10-15 13:31:08 -04:00
unlink.c NFS: Avoid referencing the cred twice in async rename/unlink 2020-03-16 08:34:29 -04:00
write.c NFS: Don't report errors from nfs_pageio_complete() more than once 2022-06-09 10:21:19 +02:00