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3064b6861d
linux/fs/nfs
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Jeff Layton 3064b6861d nfs: have flexfiles mirror keep creds for both ro and rw layouts 
A mirror can be shared between multiple layouts, even with different
iomodes. That makes stats gathering simpler, but it causes a problem
when we get different creds in READ vs. RW layouts.

The current code drops the newer credentials onto the floor when this
occurs. That's problematic when you fetch a READ layout first, and then
a RW. If the READ layout doesn't have the correct creds to do a write,
then writes will fail.

We could just overwrite the READ credentials with the RW ones, but that
would break the ability for the server to fence the layout for reads if
things go awry. We need to be able to revert to the earlier READ creds
if the RW layout is returned afterward.

The simplest fix is to just keep two sets of creds per mirror. One for
READ layouts and one for RW, and then use the appropriate set depending
on the iomode of the layout segment.

Also fix up some RCU nits that sparse found.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2016-05-09 09:05:40 -04:00
..
blocklayout mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
filelayout NFS: Save struct inode * inside nfs_commit_info to clarify usage of i_lock 2016-05-09 09:05:40 -04:00
flexfilelayout nfs: have flexfiles mirror keep creds for both ro and rw layouts 2016-05-09 09:05:40 -04:00
objlayout mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
cache_lib.c
cache_lib.h
callback_proc.c NFSv4.x: Fix NFS4ERR_RETRY_UNCACHED_REP in nfs4_callback_sequence 2016-02-01 12:06:24 -05:00
callback_xdr.c NFSv4.x: Allow multiple callbacks in flight 2016-01-25 09:36:21 -05:00
callback.c NFS: Enable client side NFSv4.1 backchannel to use other transports 2015-11-02 16:29:13 -05:00
callback.h NFSv4.x: Allow multiple callbacks in flight 2016-01-25 09:36:21 -05:00
client.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
delegation.c NFSv4: Don't use synchronous delegation recall in exception handling 2015-10-08 10:45:53 -04:00
delegation.h NFSv4: Recovery of recalled read delegations is broken 2015-09-20 22:34:16 -04:00
dir.c These changes contains a fix for overlayfs interacting with some 2016-04-07 17:22:20 -07:00
direct.c NFS: Save struct inode * inside nfs_commit_info to clarify usage of i_lock 2016-05-09 09:05:40 -04:00
dns_resolve.c
dns_resolve.h
file.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
fscache-index.c
fscache.c
fscache.h
getroot.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
inode.c These changes contains a fix for overlayfs interacting with some 2016-04-07 17:22:20 -07:00
internal.h mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
iostat.h
Kconfig kernel: conditionally support non-root users, groups and capabilities 2015-04-15 16:35:22 -07:00
Makefile NFS: Rename idmap.c to nfs4idmap.c 2015-04-23 15:16:14 -04:00
mount_clnt.c NFS: Remove unneeded NFS_DEBUG checking before define NFSDBG_FACILITY 2015-10-21 15:49:23 -05:00
namespace.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
netns.h
nfs2super.c
nfs2xdr.c nfs: save server READ/WRITE/COMMIT status 2015-02-03 11:06:40 -08:00
nfs3_fs.h nfsv3: introduce nfs3_set_ds_client 2015-02-03 11:06:34 -08:00
nfs3acl.c posix acls: Remove duplicate xattr name definitions 2015-12-06 21:25:17 -05:00
nfs3client.c nfs: set hostname when creating nfsv3 ds connection 2015-02-03 11:06:38 -08:00
nfs3proc.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
nfs3super.c nfsv3: introduce nfs3_set_ds_client 2015-02-03 11:06:34 -08:00
nfs3xdr.c xprtrdma: Fix large NFS SYMLINK calls 2015-08-05 16:21:28 -04:00
nfs4_fs.h NFSv4: Refactor NFSv4 error handling 2015-10-08 10:45:51 -04:00
nfs4client.c nfs4: start callback_ident at idr 1 2015-11-23 21:59:42 -05:00
nfs4file.c These changes contains a fix for overlayfs interacting with some 2016-04-07 17:22:20 -07:00
nfs4getroot.c nfs: Remove invalid NFS_ATTR_FATTR_V4_REFERRAL checking in nfs4_get_rootfh 2015-07-01 11:31:22 -04:00
nfs4idmap.c KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
nfs4idmap.h NFS: Move nfs_idmap.h into fs/nfs/ 2015-04-23 15:16:14 -04:00
nfs4namespace.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
nfs4proc.c NFS client updates for Linux 4.6 2016-03-22 13:16:21 -07:00
nfs4renewd.c
nfs4session.c NFSv4.x: Allow multiple callbacks in flight 2016-01-25 09:36:21 -05:00
nfs4session.h NFSv4.x: Allow multiple callbacks in flight 2016-01-25 09:36:21 -05:00
nfs4state.c NFSv4: Don't try to reclaim unused state owners 2015-10-02 15:43:07 -04:00
nfs4super.c NFS: Move nfs_idmap.h into fs/nfs/ 2015-04-23 15:16:14 -04:00
nfs4sysctl.c nfs: do not initialise statics to 0 2015-12-28 09:57:15 -05:00
nfs4trace.c pNFS: Modify pnfs_update_layout tracepoints to use layout stateid 2015-12-28 09:57:14 -05:00
nfs4trace.h Merge branch 'bugfixes' 2016-01-07 18:45:36 -05:00
nfs4xdr.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
nfs42.h nfs42: add CLONE proc functions 2015-10-15 16:07:36 -04:00
nfs42proc.c nfs4: fix stateid handling for the NFS v4.2 operations 2016-02-17 11:38:07 -05:00
nfs42xdr.c nfs42: add CLONE xdr functions 2015-10-15 16:07:21 -04:00
nfs.h
nfsroot.c nfsroot: make nfsroot to accept the 1024 bytes long directory name 2015-10-21 15:49:19 -05:00
nfstrace.c NFSv4: Allow tracing of NFSv4 fsync calls 2015-03-27 12:39:34 -04:00
nfstrace.h NFS: Allow multiple commit requests in flight per file 2015-12-31 13:53:48 -05:00
pagelist.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
pnfs_dev.c NFSv4.1: Don't cache deviceids that have no notifications 2015-03-27 12:32:24 -04:00
pnfs_nfs.c NFS: Save struct inode * inside nfs_commit_info to clarify usage of i_lock 2016-05-09 09:05:40 -04:00
pnfs.c pnfs: set NFS_IOHDR_REDO in pnfs_read_resend_pnfs 2016-05-09 09:05:40 -04:00
pnfs.h pnfs: set NFS_IOHDR_REDO in pnfs_read_resend_pnfs 2016-05-09 09:05:40 -04:00
proc.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
read.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
super.c NFS: Remove the left global variable nfs_callback_tcpport 2015-10-21 15:49:22 -05:00
symlink.c switch ->get_link() to delayed_call, kill ->put_link() 2015-12-30 13:01:03 -05:00
sysctl.c
unlink.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
write.c NFS: Save struct inode * inside nfs_commit_info to clarify usage of i_lock 2016-05-09 09:05:40 -04:00