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Trond Myklebust ec23a86e06 pNFS: Avoid a live lock condition in pnfs_update_layout() 
[ Upstream commit 880265c77a ]

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: 0b77f97a7e ("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 14:21:59 +02:00
..
blocklayout block: Add bio_max_segs 2021-02-26 15:49:51 -07:00
filelayout NFS: fix an incorrect limit in filelayout_decode_layout() 2021-05-20 12:17:08 -04:00
flexfilelayout pnfs/flexfiles: Fix misplaced barrier in nfs4_ff_layout_prepare_ds 2021-11-18 19:17:00 +01:00
cache_lib.c
cache_lib.h
callback.c SUNRPC: Set rq_auth_stat in the pg_authenticate() callout 2021-08-10 14:18:35 -04:00
callback.h NFSv4.1: Fix uninitialised variable in devicenotify 2022-02-16 12:56:08 +01:00
callback_proc.c pNFS: Avoid a live lock condition in pnfs_update_layout() 2022-06-22 14:21:59 +02:00
callback_xdr.c NFS: remove unneeded check in decode_devicenotify_args() 2022-04-08 14:23:48 +02:00
client.c NFSv4.1 query for fs_location attr on a new file system 2022-02-16 12:56:09 +01:00
delegation.c NFSv4: Add lease breakpoints in case of a delegation recall or return 2021-06-13 19:36:28 -04:00
delegation.h NFSv4: Fix delegation return in cases where we have to retry 2021-06-13 19:36:27 -04:00
dir.c NFSv4: fix open failure with O_ACCMODE flag 2022-04-13 20:59:15 +02:00
direct.c NFS: swap-out must always use STABLE writes. 2022-04-13 20:59:13 +02:00
dns_resolve.c NFS: remove duplicate headers 2020-05-27 10:10:12 -04:00
dns_resolve.h
export.c nfs: don't atempt blocking locks on nfs reexports 2021-08-26 15:32:10 -04:00
file.c NFS: Do not report flush errors in nfs_write_end() 2022-06-09 10:23:15 +02:00
fs_context.c nfs: fix broken handling of the softreval mount option 2022-05-18 10:26:49 +02:00
fscache-index.c
fscache.c NFS: Fix fscache read from NFS after cache error 2021-07-08 14:03:26 -04:00
fscache.h
getroot.c NFS: Create a new nfs_alloc_fattr_with_label() function 2022-06-09 10:23:17 +02:00
inode.c NFS: Convert GFP_NOFS to GFP_KERNEL 2022-06-09 10:23:17 +02:00
internal.h NFS: Create a new nfs_alloc_fattr_with_label() function 2022-06-09 10:23:17 +02:00
io.c NFS: Fix up incorrect documentation 2021-04-05 09:04:20 -04:00
iostat.h
Kconfig nfs: fix PNFS_FLEXFILE_LAYOUT Kconfig default 2021-03-08 11:47:47 -05:00
Makefile NFSv4.2: add client side xattr caching. 2020-07-13 17:52:46 -04:00
mount_clnt.c nfs: hornor timeo and retrans option when mounting NFSv3 2021-04-05 09:04:21 -04:00
namespace.c nfs: Remove trailing semicolon in macros 2021-05-27 09:19:33 -04:00
netns.h
nfs.h
nfs2super.c
nfs2xdr.c NFS: Return valid errors from nfs2/3_decode_dirent() 2022-04-08 14:23:46 +02:00
nfs3_fs.h vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
nfs3acl.c vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
nfs3client.c
nfs3proc.c NFSv3: Delete duplicate judgement in nfs3_async_handle_jukebox 2021-08-27 16:36:21 -04:00
nfs3super.c
nfs3xdr.c NFS: Return valid errors from nfs2/3_decode_dirent() 2022-04-08 14:23:46 +02:00
nfs4_fs.h NFSv4 handle port presence in fs_location server string 2022-02-16 12:56:10 +01:00
nfs4client.c nfs: nfs4clinet: check the return value of kstrdup() 2022-02-16 12:56:08 +01:00
nfs4file.c NFSv4: fix open failure with O_ACCMODE flag 2022-04-13 20:59:15 +02:00
nfs4getroot.c
nfs4idmap.c Fix user namespace leak 2021-11-18 19:17:02 +01:00
nfs4idmap.h
nfs4namespace.c NFSv4 handle port presence in fs_location server string 2022-02-16 12:56:10 +01:00
nfs4proc.c NFSv4: Don't hold the layoutget locks across multiple RPC calls 2022-06-14 18:36:15 +02:00
nfs4renewd.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
nfs4session.c
nfs4session.h NFSv4.1: use BITS_PER_LONG macro in nfs4session.h 2020-12-14 06:51:07 -05:00
nfs4state.c NFS: Convert GFP_NOFS to GFP_KERNEL 2022-06-09 10:23:17 +02:00
nfs4super.c NFS: Adjust fs_context error logging 2021-01-10 13:32:39 -05:00
nfs4sysctl.c
nfs4trace.c
nfs4trace.h treewide: Add missing semicolons to __assign_str uses 2021-06-30 09:19:14 -04:00
nfs4xdr.c NFSv4 remove zero number of fs_locations entries error check 2022-02-16 12:56:09 +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 20:59:11 +02:00
nfs42xattr.c nfs: Fix a typo in the file nfs42xattr.c 2021-04-05 09:04:20 -04:00
nfs42xdr.c NFSv42: Don't fail clone() unless the OP_CLONE operation failed 2021-12-01 09:04:47 +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 NFSv4: Catch and trace server filehandle encoding errors 2021-04-14 09:36:29 -04:00
nfstrace.h Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-07-03 11:41:14 -07:00
pagelist.c NFSv4.1 mark qualified async operations as MOVEABLE tasks 2022-06-09 10:23:17 +02:00
pnfs.c pNFS: Avoid a live lock condition in pnfs_update_layout() 2022-06-22 14:21:59 +02:00
pnfs.h pNFS: Avoid a live lock condition in pnfs_update_layout() 2022-06-22 14:21:59 +02:00
pnfs_dev.c NFSv4/pnfs: Add tracing for the deviceid cache 2020-12-16 17:25:24 -05:00
pnfs_nfs.c NFS: nfsiod should not block forever in mempool_alloc() 2022-04-13 20:59:13 +02:00
proc.c NFS: NFSv2/v3 clients should never be setting NFS_CAP_XATTR 2022-04-08 14:22:52 +02:00
read.c NFS: Always provide aligned buffers to the RPC read layers 2021-08-30 13:21:38 -04:00
super.c NFSv4 introduce max_connect mount options 2021-08-27 16:37:17 -04:00
symlink.c
sysctl.c
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 NFSv4.1 mark qualified async operations as MOVEABLE tasks 2022-06-09 10:23:17 +02:00
write.c NFSv4.1 mark qualified async operations as MOVEABLE tasks 2022-06-09 10:23:17 +02:00