use d_alloc_parallel() for sillyunlink/lookup exclusion and
explicit rwsem (nfs_rmdir() being a writer and nfs_call_unlink() -
a reader) for rmdir/sillyunlink one.
That ought to make lookup/readdir/!O_CREAT atomic_open really
parallel on NFS.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
There's no guarantee that an IP address in a different network namespace
actually represents the same endpoint.
Also, if we allow unprivileged nfs mounts some day then this might allow
an unprivileged user in another network namespace to misdirect somebody
else's nfs mounts.
If sharing between containers is really what's wanted then that could
still be arranged explicitly, for example with bind mounts.
Reported-by: "Eric W. Biederman" <ebiederm@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
At Connectathon 2016, we found that recent upstream Linux clients
would occasionally send a LOCK operation with a zero stateid. This
appeared to happen in close proximity to another thread returning
a delegation before unlinking the same file while it remained open.
Earlier, the client received a write delegation on this file and
returned the open stateid. Now, as it is getting ready to unlink the
file, it returns the write delegation. But there is still an open
file descriptor on that file, so the client must OPEN the file
again before it returns the delegation.
Since commit 24311f8841 ('NFSv4: Recovery of recalled read
delegations is broken'), nfs_open_delegation_recall() clears the
NFS_DELEGATED_STATE flag _before_ it sends the OPEN. This allows a
racing LOCK on the same inode to be put on the wire before the OPEN
operation has returned a valid open stateid.
To eliminate this race, serialize delegation return with the
acquisition of a file lock on the same file. Adopt the same approach
as is used in the unlock path.
This patch also eliminates a similar race seen when sending a LOCK
operation at the same time as returning a delegation on the same file.
Fixes: 24311f8841 ('NFSv4: Recovery of recalled read ... ')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
[Anna: Add sentence about LOCK / delegation race]
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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>
We're just as likely to have allocation problems here as we would if we
delay looking up the credential like we currently do. Fix the code to
get a rpc_cred reference early, as soon as the mirror is set up.
This allows us to eliminate the mirror early if there is a problem
getting an rpc credential. This also allows us to drop the uid/gid
from the layout_mirror struct as well.
In the event that we find an existing mirror where this one would go, we
swap in the new creds unconditionally, and drop the reference to the old
one.
Note that the old ff_layout_update_mirror_cred function wouldn't set
this pointer unless the DS version was 3, but we don't know what the DS
version is at this point. I'm a little unclear on why it did that as you
still need creds to talk to v4 servers as well. I have the code set
it regardless of the DS version here.
Also note the change to using generic creds instead of calling
lookup_cred directly. With that change, we also need to populate the
group_info pointer in the acred as some functions expect that to never
be NULL. Instead of allocating one every time however, we can allocate
one when the module is loaded and share it since the group_info is
refcounted.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
In later patches, we're going to want to allow the creds to be updated
when we get a new layout with updated creds. Have this function take
a reference to the cred that is later put once the call has been
dispatched.
Also, prepare for this change by ensuring we follow RCU rules when
getting a reference to the cred as well.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
All the callers already call that function before calling into here,
so it ends up being a no-op anyway.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Commit ea2cf22 created nfs_commit_info and saved &inode->i_lock inside
this NFS specific structure. This obscures the usage of i_lock.
Instead, save struct inode * so later it's clear the spinlock taken is
i_lock.
Should be no functional change.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This will pop a warning if we count too many good bytes.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Like other resend paths, mark the (old) hdr as NFS_IOHDR_REDO. This
ensures the hdr completion function will not count the (old) hdr
as good bytes.
Also, vector the error back through the hdr->task.tk_status like other
retry calls.
This fixes a bug with the FlexFiles layout where libaio was reporting more
bytes read than requested.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
aside of the usual care about seeding dcache from readdir, we need
to be careful about the pagecache evictions here.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The kiocb already has the new position, so use that. The only interesting
case is AIO, where we currently don't bother updating ki_pos. We're about
to free the kiocb after we're done, so we might as well update it to make
everyone's life simpler.
While we're at it also return the bytes written argument passed in if
we were successful so that the boilerplate error switch code in the
callers can go away.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This will allow us to do per-I/O sync file writes, as required by a lot
of fileservers or storage targets.
XXX: Will need a few additional audits for O_DSYNC
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Including blkdev_direct_IO and dax_do_io. It has to be ki_pos to actually
work, so eliminate the superflous argument.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Add a facility whereby proposed new links to be added to a keyring can be
vetted, permitting them to be rejected if necessary. This can be used to
block public keys from which the signature cannot be verified or for which
the signature verification fails. It could also be used to provide
blacklisting.
This affects operations like add_key(), KEYCTL_LINK and KEYCTL_INSTANTIATE.
To this end:
(1) A function pointer is added to the key struct that, if set, points to
the vetting function. This is called as:
int (*restrict_link)(struct key *keyring,
const struct key_type *key_type,
unsigned long key_flags,
const union key_payload *key_payload),
where 'keyring' will be the keyring being added to, key_type and
key_payload will describe the key being added and key_flags[*] can be
AND'ed with KEY_FLAG_TRUSTED.
[*] This parameter will be removed in a later patch when
KEY_FLAG_TRUSTED is removed.
The function should return 0 to allow the link to take place or an
error (typically -ENOKEY, -ENOPKG or -EKEYREJECTED) to reject the
link.
The pointer should not be set directly, but rather should be set
through keyring_alloc().
Note that if called during add_key(), preparse is called before this
method, but a key isn't actually allocated until after this function
is called.
(2) KEY_ALLOC_BYPASS_RESTRICTION is added. This can be passed to
key_create_or_update() or key_instantiate_and_link() to bypass the
restriction check.
(3) KEY_FLAG_TRUSTED_ONLY is removed. The entire contents of a keyring
with this restriction emplaced can be considered 'trustworthy' by
virtue of being in the keyring when that keyring is consulted.
(4) key_alloc() and keyring_alloc() take an extra argument that will be
used to set restrict_link in the new key. This ensures that the
pointer is set before the key is published, thus preventing a window
of unrestrictedness. Normally this argument will be NULL.
(5) As a temporary affair, keyring_restrict_trusted_only() is added. It
should be passed to keyring_alloc() as the extra argument instead of
setting KEY_FLAG_TRUSTED_ONLY on a keyring. This will be replaced in
a later patch with functions that look in the appropriate places for
authoritative keys.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
(badly behaved) dentry code in various file systems. These have been
reviewed by Al and the respective file system mtinainers and are going
through the ext4 tree for convenience.
This also has a few ext4 encryption bug fixes that were discovered in
Android testing (yes, we will need to get these sync'ed up with the
fs/crypto code; I'll take care of that). It also has some bug fixes
and a change to ignore the legacy quota options to allow for xfstests
regression testing of ext4's internal quota feature and to be more
consistent with how xfs handles this case.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABCAAGBQJXBn4aAAoJEPL5WVaVDYGjHWgH/2wXnlQnC2ndJhblBWtPzprz
OQW4dawdnhxqbTEGUqWe942tZivSb/liu/lF+urCGbWsbgz9jNOCmEAg7JPwlccY
mjzwDvtVq5U4d2rP+JDWXLy/Gi8XgUclhbQDWFVIIIea6fS7IuFWqoVBR+HPMhra
9tEygpiy5lNtJA/hqq3/z9x0AywAjwrYR491CuWreo2Uu1aeKg0YZsiDsuAcGioN
Waa2TgbC/ZZyJuJcPBP8If+VOFAa0ea3F+C/o7Tb9bOqwuz0qSTcaMRgt6eQ2KUt
P4b9Ecp1XLjJTC7IYOknUOScY3lCyREx/Xya9oGZfFNTSHzbOlLBoplCr3aUpYQ=
=/HHR
-----END PGP SIGNATURE-----
Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bugfixes from Ted Ts'o:
"These changes contains a fix for overlayfs interacting with some
(badly behaved) dentry code in various file systems. These have been
reviewed by Al and the respective file system mtinainers and are going
through the ext4 tree for convenience.
This also has a few ext4 encryption bug fixes that were discovered in
Android testing (yes, we will need to get these sync'ed up with the
fs/crypto code; I'll take care of that). It also has some bug fixes
and a change to ignore the legacy quota options to allow for xfstests
regression testing of ext4's internal quota feature and to be more
consistent with how xfs handles this case"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: ignore quota mount options if the quota feature is enabled
ext4 crypto: fix some error handling
ext4: avoid calling dquot_get_next_id() if quota is not enabled
ext4: retry block allocation for failed DIO and DAX writes
ext4: add lockdep annotations for i_data_sem
ext4: allow readdir()'s of large empty directories to be interrupted
btrfs: fix crash/invalid memory access on fsync when using overlayfs
ext4 crypto: use dget_parent() in ext4_d_revalidate()
ext4: use file_dentry()
ext4: use dget_parent() in ext4_file_open()
nfs: use file_dentry()
fs: add file_dentry()
ext4 crypto: don't let data integrity writebacks fail with ENOMEM
ext4: check if in-inode xattr is corrupted in ext4_expand_extra_isize_ea()
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When get_acl() is called for an inode whose ACL is not cached yet, the
get_acl inode operation is called to fetch the ACL from the filesystem.
The inode operation is responsible for updating the cached acl with
set_cached_acl(). This is done without locking at the VFS level, so
another task can call set_cached_acl() or forget_cached_acl() before the
get_acl inode operation gets to calling set_cached_acl(), and then
get_acl's call to set_cached_acl() results in caching an outdate ACL.
Prevent this from happening by setting the cached ACL pointer to a
task-specific sentinel value before calling the get_acl inode operation.
Move the responsibility for updating the cached ACL from the get_acl
inode operations to get_acl(). There, only set the cached ACL if the
sentinel value hasn't changed.
The sentinel values are chosen to have odd values. Likewise, the value
of ACL_NOT_CACHED is odd. In contrast, ACL object pointers always have
an even value (ACLs are aligned in memory). This allows to distinguish
uncached ACLs values from ACL objects.
In addition, switch from guarding inode->i_acl and inode->i_default_acl
upates by the inode->i_lock spinlock to using xchg() and cmpxchg().
Filesystems that do not want ACLs returned from their get_acl inode
operations to be cached must call forget_cached_acl() to prevent the VFS
from doing so.
(Patch written by Al Viro and Andreas Gruenbacher.)
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
NFS may be used as lower layer of overlayfs and accessing f_path.dentry can
lead to a crash.
Fix by replacing direct access of file->f_path.dentry with the
file_dentry() accessor, which will always return a native object.
Fixes: 4bacc9c923 ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Tested-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Acked-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: <stable@vger.kernel.org> # v4.2
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
pnfs layout type from Christoph Hellwig. The new layout type is a
variant of the block layout which uses SCSI features to offer improved
fencing and device identification.
Note this pull request also includes the client side of SCSI layout,
with Trond's permission.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=MToz
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.6-1' of git://linux-nfs.org/~bfields/linux
Pull more nfsd updates from Bruce Fields:
"Apologies for the previous request, which omitted the top 8 commits
from my for-next branch (including the SCSI layout commits). Thanks
to Trond for spotting my error!"
This actually includes the new layout types, so here's that part of
the pull message repeated:
"Support for a new pnfs layout type from Christoph Hellwig. The new
layout type is a variant of the block layout which uses SCSI features
to offer improved fencing and device identification.
Note this pull request also includes the client side of SCSI layout,
with Trond's permission"
* tag 'nfsd-4.6-1' of git://linux-nfs.org/~bfields/linux:
nfsd: use short read as well as i_size to set eof
nfsd: better layoutupdate bounds-checking
nfsd: block and scsi layout drivers need to depend on CONFIG_BLOCK
nfsd: add SCSI layout support
nfsd: move some blocklayout code
nfsd: add a new config option for the block layout driver
nfs/blocklayout: add SCSI layout support
nfs4.h: add SCSI layout definitions
Highlights include:
Features:
- Add support for multiple NFSv4.1 callbacks in flight
- Initial patchset for RPC multipath support
- Adapt RPC/RDMA to use the new completion queue API
Bugfixes and cleanups:
- nfs4: nfs4_ff_layout_prepare_ds should return NULL if connection failed
- Cleanups to remove nfs_inode_dio_wait and nfs4_file_fsync
- Fix RPC/RDMA credit accounting
- Properly handle RDMA_ERROR replies
- xprtrdma: Do not wait if ib_post_send() fails
- xprtrdma: Segment head and tail XDR buffers on page boundaries
- xprtrdma cleanups for dprintk, physical_op_map and unused macros
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=kC3t
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.6-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Features:
- Add support for multiple NFSv4.1 callbacks in flight
- Initial patchset for RPC multipath support
- Adapt RPC/RDMA to use the new completion queue API
Bugfixes and cleanups:
- nfs4: nfs4_ff_layout_prepare_ds should return NULL if connection failed
- Cleanups to remove nfs_inode_dio_wait and nfs4_file_fsync
- Fix RPC/RDMA credit accounting
- Properly handle RDMA_ERROR replies
- xprtrdma: Do not wait if ib_post_send() fails
- xprtrdma: Segment head and tail XDR buffers on page boundaries
- xprtrdma cleanups for dprintk, physical_op_map and unused macros"
* tag 'nfs-for-4.6-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (35 commits)
nfs/blocklayout: make sure making a aligned read request
nfs4: nfs4_ff_layout_prepare_ds should return NULL if connection failed
nfs: remove nfs_inode_dio_wait
nfs: remove nfs4_file_fsync
xprtrdma: Use new CQ API for RPC-over-RDMA client send CQs
xprtrdma: Use an anonymous union in struct rpcrdma_mw
xprtrdma: Use new CQ API for RPC-over-RDMA client receive CQs
xprtrdma: Serialize credit accounting again
xprtrdma: Properly handle RDMA_ERROR replies
rpcrdma: Add RPCRDMA_HDRLEN_ERR
xprtrdma: Do not wait if ib_post_send() fails
xprtrdma: Segment head and tail XDR buffers on page boundaries
xprtrdma: Clean up dprintk format string containing a newline
xprtrdma: Clean up physical_op_map()
xprtrdma: Clean up unused RPCRDMA_INLINE_PAD_THRESH macro
NFS add callback_ops to nfs4_proc_bind_conn_to_session_callback
pnfs/NFSv4.1: Add multipath capabilities to pNFS flexfiles servers over NFSv3
SUNRPC: Allow addition of new transports to a struct rpc_clnt
NFSv4.1: nfs4_proc_bind_conn_to_session must iterate over all connections
SUNRPC: Make NFS swap work with multipath
...
Only treat write goes up to the inode size as aligned request,
because it always write PAGE_CACHE_SIZE, but read a dynamic size.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Pull vfs updates from Al Viro:
- Preparations of parallel lookups (the remaining main obstacle is the
need to move security_d_instantiate(); once that becomes safe, the
rest will be a matter of rather short series local to fs/*.c
- preadv2/pwritev2 series from Christoph
- assorted fixes
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (32 commits)
splice: handle zero nr_pages in splice_to_pipe()
vfs: show_vfsstat: do not ignore errors from show_devname method
dcache.c: new helper: __d_add()
don't bother with __d_instantiate(dentry, NULL)
untangle fsnotify_d_instantiate() a bit
uninline d_add()
replace d_add_unique() with saner primitive
quota: use lookup_one_len_unlocked()
cifs_get_root(): use lookup_one_len_unlocked()
nfs_lookup: don't bother with d_instantiate(dentry, NULL)
kill dentry_unhash()
ceph_fill_trace(): don't bother with d_instantiate(dn, NULL)
autofs4: don't bother with d_instantiate(dentry, NULL) in ->lookup()
configfs: move d_rehash() into configfs_create() for regular files
ceph: don't bother with d_rehash() in splice_dentry()
namei: teach lookup_slow() to skip revalidate
namei: massage lookup_slow() to be usable by lookup_one_len_unlocked()
lookup_one_len_unlocked(): use lookup_dcache()
namei: simplify invalidation logics in lookup_dcache()
namei: change calling conventions for lookup_{fast,slow} and follow_managed()
...
This is a trivial extension to the block layout driver to support the
new SCSI layouts draft. There are three changes:
- device identifcation through the SCSI VPD page. This allows us to
directly use the udev generated persistent device names instead of
requiring an expensive lookup by crawling every block device node
in /dev and reading a signature for it.
- use of SCSI persistent reservations to protect device access and
allow for robust fencing. On the client sides this just means
registering and unregistering a server supplied key.
- an optimized LAYOUTCOMMIT payload that doesn't send unessecary
fields to the server.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Just call inode_dio_wait directly instead of through a pointless wrapper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The only difference to nfs_file_fsync is the call to pnfs_sync_inode. But
pnfs_sync_inode is just an inline that calls a pNFS layout driver method
if CONFIG_PNFS is designed, and thus can be called just fine from the core
NFS module.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
new primitive: d_exact_alias(dentry, inode). If there is an unhashed
dentry with the same name/parent and given inode, rehash, grab and
return it. Otherwise, return NULL. The only caller of d_add_unique()
switched to d_exact_alias() + d_splice_alias().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* multipath:
NFS add callback_ops to nfs4_proc_bind_conn_to_session_callback
pnfs/NFSv4.1: Add multipath capabilities to pNFS flexfiles servers over NFSv3
SUNRPC: Allow addition of new transports to a struct rpc_clnt
NFSv4.1: nfs4_proc_bind_conn_to_session must iterate over all connections
SUNRPC: Make NFS swap work with multipath
SUNRPC: Add a helper to apply a function to all the rpc_clnt's transports
SUNRPC: Allow caller to specify the transport to use
SUNRPC: Use the multipath iterator to assign a transport to each task
SUNRPC: Make rpc_clnt store the multipath iterators
SUNRPC: Add a structure to track multiple transports
SUNRPC: Make freeing of struct xprt rcu-safe
SUNRPC: Uninline xprt_get(); It isn't performance critical.
SUNRPC: Reorder rpc_task to put waitqueue related info in same cachelines
SUNRPC: Remove unused function rpc_task_reset_client
* nfsv41_cb:
NFSv4.x: Fix NFS4ERR_RETRY_UNCACHED_REP in nfs4_callback_sequence
NFSv4.x: Allow multiple callbacks in flight
NFSv4.x: Fix wraparound issues when validing the callback sequence id
NFSv4.x: Enforce the ca_maxresponsesize_cached on the back channel
NFSv4.x: CB_SEQUENCE should return NFS4ERR_DELAY if still executing
NFSv4.x: Remove hard coded slotids in callback channel
Replace another case where the layout 'plh_block_lgets' can trigger
infinite loops in send_layoutget().
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If the server reboots while there is a layoutget outstanding, then
the call to pnfs_choose_layoutget_stateid() will fail with an EAGAIN
error, which causes an infinite loop in send_layoutget(). The reason
why we never break out of the loop is that the layout 'plh_block_lgets'
field is never cleared.
Fix is to replace plh_block_lgets with NFS_LAYOUT_INVALID_STID, which
can be reset after a new layoutget.
Fixes: ab7d763e47 ("pNFS: Ensure nfs4_layoutget_prepare returns...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The newly added NFS v4.2 operations (ALLOCATE, DEALLOCATE, SEEK and CLONE)
use a helper called nfs42_set_rw_stateid to select a stateid that is sent
to the server. But they don't set the inode and state fields in the
nfs4_exception structure, and this don't partake in the stateid recovery
protocol. Because of this they will simply return errors insted of trying
to recover a stateid when the server return a BAD_STATEID error.
Additionally CLONE has the problem that it operates on two files and thus
two stateids, and thus needs to call the exception handler twice to
recover stateids.
While we're at it stop grabbing an addititional reference to the open
context in all these operations - having the file open guarantees that
the open context won't go away.
All this can be produces with the generic/168 and generic/170 tests in
xfstests which stress the CLONE stateid handling.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
In the case where d_add_unique() finds an appropriate alias to use it will
have already incremented the reference count. An additional dget() to swap
the open context's dentry is unnecessary and will leak a reference.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 275bb30786 ("NFSv4: Move dentry instantiation into the NFSv4-...")
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
When setting the layout return mode, we must always also set the
NFS_LAYOUT_RETURN_REQUESTED flag to ensure that we send a layoutreturn.
Otherwise pnfs_error_mark_layout_for_return() could set the mode, but
fail to send the layoutreturn because another is already in flight.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
We don't need to schedule a layoutreturn if the layout segment can
be freed immediately.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This adds multipathing to pNFS over NFSv3 as described in the flexfiles
draft spec.
Ideally, we'd like to do the same for pNFS files, but the NFSv4.1 protocol
requires a call to EXCHANGE_ID in order to test that the connection can do
session trunking.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Use the new helper to ensure that nfs4_proc_bind_conn_to_session() is called
for all connections.
However ensure that we only set the backchannel flag for the connection
pointed to by rpc_clnt->cl_xprt.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
We need to initialize cb_sequenceres information when reporting a
NFS4ERR_RETRY_UNCACHED_REP error, since that will apply to the
next operation, not to the CB_SEQUENCE itself.
Reported-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
NFS_LAYOUT_RETURN_BEFORE_CLOSE is being used to signal that a
layoutreturn is needed, either due to a layout recall or to a
layout error. Rename it to NFS_LAYOUT_RETURN_REQUESTED in order
to clarify its purpose.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The layoutreturn code currently relies on pnfs_put_lseg() to initiate the
RPC call when conditions are right. A problem arises when we want to
free the layout segment from inside an inode->i_lock section (e.g. in
pnfs_clear_request_commit()), since we cannot sleep.
The workaround is to move the actual call to pnfs_send_layoutreturn()
to pnfs_put_layout_hdr(), which doesn't have this restriction.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Hook the callback channel into the same session management machinery
as we use for the forward channel.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
We have no duplicate reply cache, so we always set the back channel
ca_maxresponsesize_cached to zero when negotiating the session.
That means we should always error out as soon as we see the server
set args->csa_cachethis.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
See RFC5661 Section 2.10.6.2: if retrying a request, and the old one is
still in progress, we must return NFS4ERR_DELAY as the reply to sequence.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Pull final vfs updates from Al Viro:
- The ->i_mutex wrappers (with small prereq in lustre)
- a fix for too early freeing of symlink bodies on shmem (they need to
be RCU-delayed) (-stable fodder)
- followup to dedupe stuff merged this cycle
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
vfs: abort dedupe loop if fatal signals are pending
make sure that freeing shmem fast symlinks is RCU-delayed
wrappers for ->i_mutex access
lustre: remove unused declaration
parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).
Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
We must not skip encoding the statistics, or the server will see an
XDR encoding error.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # 4.0+
I noticed that all the callers of this function pass cinfo->mds->list as
an argument in addition to the cinfo structure itself. Let's get rid of
the extra argument, since it doesn't seem to be adding anything.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
When we hit 22 errors, we start to overflow the memory buffers allocated
to the LAYOUTRETURN errors. The issue is that currently, RPC call reply
ordering determines how successful we are in merging errors that refer
to contiguous READ or WRITE requests.
Fix is to use an insertion sort to help detect contiguity.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Merge first patch-bomb from Andrew Morton:
- A few hotfixes which missed 4.4 becasue I was asleep. cc'ed to
-stable
- A few misc fixes
- OCFS2 updates
- Part of MM. Including pretty large changes to page-flags handling
and to thp management which have been buffered up for 2-3 cycles now.
I have a lot of MM material this time.
[ It turns out the THP part wasn't quite ready, so that got dropped from
this series - Linus ]
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (117 commits)
zsmalloc: reorganize struct size_class to pack 4 bytes hole
mm/zbud.c: use list_last_entry() instead of list_tail_entry()
zram/zcomp: do not zero out zcomp private pages
zram: pass gfp from zcomp frontend to backend
zram: try vmalloc() after kmalloc()
zram/zcomp: use GFP_NOIO to allocate streams
mm: add tracepoint for scanning pages
drivers/base/memory.c: fix kernel warning during memory hotplug on ppc64
mm/page_isolation: use macro to judge the alignment
mm: fix noisy sparse warning in LIBCFS_ALLOC_PRE()
mm: rework virtual memory accounting
include/linux/memblock.h: fix ordering of 'flags' argument in comments
mm: move lru_to_page to mm_inline.h
Documentation/filesystems: describe the shared memory usage/accounting
memory-hotplug: don't BUG() in register_memory_resource()
hugetlb: make mm and fs code explicitly non-modular
mm/swapfile.c: use list_for_each_entry_safe in free_swap_count_continuations
mm: /proc/pid/clear_refs: no need to clear VM_SOFTDIRTY in clear_soft_dirty_pmd()
mm: make sure isolate_lru_page() is never called for tail page
vmstat: make vmstat_updater deferrable again and shut down on idle
...
Highlights include:
Stable fixes:
- Fix a regression in the SunRPC socket polling code
- Fix the attribute cache revalidation code
- Fix race in __update_open_stateid()
- Fix an lo->plh_block_lgets imbalance in layoutreturn
- Fix an Oopsable typo in ff_mirror_match_fh()
Features:
- pNFS layout recall performance improvements.
- pNFS/flexfiles: Support server-supplied layoutstats sampling period
Bugfixes + cleanups:
- NFSv4: Don't perform cached access checks before we've OPENed the file
- Fix starvation issues with background flushes
- Reclaim writes should be flushed as unstable writes if there are already
entries in the commit lists
- Various bugfixes from Chuck to fix NFS/RDMA send queue ordering problems
- Ensure that we propagate fatal layoutget errors back to the application
- Fixes for sundry flexfiles layoutstats bugs
- Fix files/flexfiles to not cache invalidated layouts in the DS commit buckets
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQIcBAABAgAGBQJWmAvPAAoJEGcL54qWCgDysScP/jnaRdQO+VTXTMtKcPiR7ujd
LBcx3lrI1jsLYjlrBguTh9ROGt0maX1TAu/rsLuo4j/0wQC6dsQw+vFjfkI4CzSn
4htK0f4hNjA29iOAjMaziAzsQW9eJ97Nn0HU4XD43OeK7PGh5e93Xk26Va4cO18P
PqSam+FJoXpUSEWOzNzDwjTZTt4Voo3yJDqDTa8dU0x8c1qBktslo2n0WCntBxMn
IbEDdBEIaUZmYCNhu2Sq1SLwYPatLg1Orfq3quMFJjzEeUbd0lVQno4C1fjjuACt
DNXUgZDH0uR3U3naMXrdkqQ02GHEY9G0CO4a6q0Evsbm15wQuY6GMioxR0+ll7rX
TeZGBUMq3cRFDR+/m1gTBZFjo7BUPE9LKXUazINVaoaJMYqpFunhI8V31ghx8/z8
0kiracIEPXaIGmQ5S151+IDETpw9nntipCzdnduVefB2EAfXPeDzF7uFQPm+mvgx
R4YuAFrlbcIZ/lZRYy5z6Fj3KLnytSOjzgXC5daxPQVt92QumQTQ6HC5jL25zVKb
KOeSWHrFel7M+miL96ERvcS2vi+IDzPH9YbE9YTWbLW9LMBOYQKsukf1aaV9CwC4
9OiNMYGQIGtmjbzIOlRcpVTAsXj+P6UVuwCfGTpQOm1Qa1fDbU+xSLkc62gg3WRa
3E/3RMr1iXD8u1Kiz8hb
=RBmi
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Stable fixes:
- Fix a regression in the SunRPC socket polling code
- Fix the attribute cache revalidation code
- Fix race in __update_open_stateid()
- Fix an lo->plh_block_lgets imbalance in layoutreturn
- Fix an Oopsable typo in ff_mirror_match_fh()
Features:
- pNFS layout recall performance improvements.
- pNFS/flexfiles: Support server-supplied layoutstats sampling period
Bugfixes + cleanups:
- NFSv4: Don't perform cached access checks before we've OPENed the
file
- Fix starvation issues with background flushes
- Reclaim writes should be flushed as unstable writes if there are
already entries in the commit lists
- Various bugfixes from Chuck to fix NFS/RDMA send queue ordering
problems
- Ensure that we propagate fatal layoutget errors back to the
application
- Fixes for sundry flexfiles layoutstats bugs
- Fix files/flexfiles to not cache invalidated layouts in the DS
commit buckets"
* tag 'nfs-for-4.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (68 commits)
NFS: Fix a compile warning about unused variable in nfs_generic_pg_pgios()
NFSv4: Fix a compile warning about no prototype for nfs4_ioctl()
NFS: Use wait_on_atomic_t() for unlock after readahead
SUNRPC: Fixup socket wait for memory
NFSv4.1/pNFS: Cleanup constify struct pnfs_layout_range arguments
NFSv4.1/pnfs: Cleanup copying of pnfs_layout_range structures
NFSv4.1/pNFS: Cleanup pnfs_mark_matching_lsegs_invalid()
NFSv4.1/pNFS: Fix a race in initiate_file_draining()
NFSv4.1/pNFS: pnfs_error_mark_layout_for_return() must always return layout
NFSv4.1/pNFS: pnfs_mark_matching_lsegs_return() should set the iomode
NFSv4.1/pNFS: Use nfs4_stateid_copy for copying stateids
NFSv4.1/pNFS: Don't pass stateids by value to pnfs_send_layoutreturn()
NFS: Relax requirements in nfs_flush_incompatible
NFSv4.1/pNFS: Don't queue up a new commit if the layout segment is invalid
NFS: Allow multiple commit requests in flight per file
NFS/pNFS: Fix up pNFS write reschedule layering violations and bugs
SUNRPC: Fix a missing break in rpc_anyaddr()
pNFS/flexfiles: Fix an Oopsable typo in ff_mirror_match_fh()
NFS: Fix attribute cache revalidation
NFS: Ensure we revalidate attributes before using execute_ok()
...
Mark those kmem allocations that are known to be easily triggered from
userspace as __GFP_ACCOUNT/SLAB_ACCOUNT, which makes them accounted to
memcg. For the list, see below:
- threadinfo
- task_struct
- task_delay_info
- pid
- cred
- mm_struct
- vm_area_struct and vm_region (nommu)
- anon_vma and anon_vma_chain
- signal_struct
- sighand_struct
- fs_struct
- files_struct
- fdtable and fdtable->full_fds_bits
- dentry and external_name
- inode for all filesystems. This is the most tedious part, because
most filesystems overwrite the alloc_inode method.
The list is far from complete, so feel free to add more objects.
Nevertheless, it should be close to "account everything" approach and
keep most workloads within bounds. Malevolent users will be able to
breach the limit, but this was possible even with the former "account
everything" approach (simply because it did not account everything in
fact).
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Greg Thelen <gthelen@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
inode_nohighmem() is sufficient to make sure that page_get_link()
won't try to allocate a highmem page. Moreover, it is sufficient
to make sure that page_symlink/__page_symlink won't do the same
thing. However, any filesystem that manually preseeds the symlink's
page cache upon symlink(2) needs to make sure that the page it
inserts there won't be a highmem one.
Fortunately, only nfs and shmem have run afoul of that...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull vfs copy_file_range updates from Al Viro:
"Several series around copy_file_range/CLONE"
* 'work.copy_file_range' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
btrfs: use new dedupe data function pointer
vfs: hoist the btrfs deduplication ioctl to the vfs
vfs: wire up compat ioctl for CLONE/CLONE_RANGE
cifs: avoid unused variable and label
nfsd: implement the NFSv4.2 CLONE operation
nfsd: Pass filehandle to nfs4_preprocess_stateid_op()
vfs: pull btrfs clone API to vfs layer
locks: new locks_mandatory_area calling convention
vfs: Add vfs_copy_file_range() support for pagecache copies
btrfs: add .copy_file_range file operation
x86: add sys_copy_file_range to syscall tables
vfs: add copy_file_range syscall and vfs helper
Pull vfs xattr updates from Al Viro:
"Andreas' xattr cleanup series.
It's a followup to his xattr work that went in last cycle; -0.5KLoC"
* 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
xattr handlers: Simplify list operation
ocfs2: Replace list xattr handler operations
nfs: Move call to security_inode_listsecurity into nfs_listxattr
xfs: Change how listxattr generates synthetic attributes
tmpfs: listxattr should include POSIX ACL xattrs
tmpfs: Use xattr handler infrastructure
btrfs: Use xattr handler infrastructure
vfs: Distinguish between full xattr names and proper prefixes
posix acls: Remove duplicate xattr name definitions
gfs2: Remove gfs2_xattr_acl_chmod
vfs: Remove vfs_xattr_cmp
Pull vfs RCU symlink updates from Al Viro:
"Replacement of ->follow_link/->put_link, allowing to stay in RCU mode
even if the symlink is not an embedded one.
No changes since the mailbomb on Jan 1"
* 'work.symlinks' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
switch ->get_link() to delayed_call, kill ->put_link()
kill free_page_put_link()
teach nfs_get_link() to work in RCU mode
teach proc_self_get_link()/proc_thread_self_get_link() to work in RCU mode
teach shmem_get_link() to work in RCU mode
teach page_get_link() to work in RCU mode
replace ->follow_link() with new method that could stay in RCU mode
don't put symlink bodies in pagecache into highmem
namei: page_getlink() and page_follow_link_light() are the same thing
ufs: get rid of ->setattr() for symlinks
udf: don't duplicate page_symlink_inode_operations
logfs: don't duplicate page_symlink_inode_operations
switch befs long symlinks to page_symlink_operations
* bugfixes:
SUNRPC: Fixup socket wait for memory
SUNRPC: Fix a missing break in rpc_anyaddr()
pNFS/flexfiles: Fix an Oopsable typo in ff_mirror_match_fh()
NFS: Fix attribute cache revalidation
NFS: Ensure we revalidate attributes before using execute_ok()
NFS: Flush reclaim writes using FLUSH_COND_STABLE
NFS: Background flush should not be low priority
NFSv4.1/pnfs: Fixup an lo->plh_block_lgets imbalance in layoutreturn
NFSv4: Don't perform cached access checks before we've OPENed the file
NFS: Allow the combination pNFS and labeled NFS
NFS42: handle layoutstats stateid error
nfs: Fix race in __update_open_stateid()
nfs: fix missing assignment in nfs4_sequence_done tracepoint
The use of wait_on_atomic_t() for waiting on I/O to complete before
unlocking allows us to git rid of the NFS_IO_INPROGRESS flag, and thus the
nfs_iocounter's flags member, and finally the nfs_iocounter altogether.
The count of I/O is moved to the lock context, and the counter
increment/decrement functions become simple enough to open-code.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
[Trond: Fix up conflict with existing function nfs_wait_atomic_killable()]
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs_generic:
NFSv4.1/pNFS: Cleanup constify struct pnfs_layout_range arguments
NFSv4.1/pnfs: Cleanup copying of pnfs_layout_range structures
NFSv4.1/pNFS: Cleanup pnfs_mark_matching_lsegs_invalid()
NFSv4.1/pNFS: Fix a race in initiate_file_draining()
NFSv4.1/pNFS: pnfs_error_mark_layout_for_return() must always return layout
NFSv4.1/pNFS: pnfs_mark_matching_lsegs_return() should set the iomode
NFSv4.1/pNFS: Use nfs4_stateid_copy for copying stateids
NFSv4.1/pNFS: Don't pass stateids by value to pnfs_send_layoutreturn()
NFS: Relax requirements in nfs_flush_incompatible
NFSv4.1/pNFS: Don't queue up a new commit if the layout segment is invalid
NFS: Allow multiple commit requests in flight per file
NFS/pNFS: Fix up pNFS write reschedule layering violations and bugs
NFSv4: List stateid information in the callback tracepoints
NFSv4.1/pNFS: Don't return NFS4ERR_DELAY unnecessarily in CB_LAYOUTRECALL
NFSv4.1/pNFS: Ensure we enforce RFC5661 Section 12.5.5.2.1
pNFS: If we have to delay the layout callback, mark the layout for return
NFSv4.1/pNFS: Add a helper to mark the layout as returned
pNFS: Ensure nfs4_layoutget_prepare returns the correct error
Peng Tao points out that the call to pnfs_mark_matching_lsegs_return()
could race with pnfs_put_lseg(), in which case the layout segment is
cleared, but no layoutreturn will be sent.
Fix is to replace the call to pnfs_mark_matching_lsegs_invalid().
Reported-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Fix a bug whereby if all the layout segments could be immediately freed,
the call to pnfs_error_mark_layout_for_return() would never result in
a layoutreturn.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If pnfs_mark_matching_lsegs_return() needs to mark a layout segment for
return, then it must also set the return iomode.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If two processes share the same credentials and NFSv4 open stateid, then
allow them both to dirty the same page, even if their nfs_open_context
differs.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If the layout segment is invalid, then we should not be adding more
write requests to the commit list. Instead, those writes should be
replayed after requesting a new layout.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Allow synchronous RPC calls to wait for pending RPC calls to finish,
but also allow asynchronous ones to just fire off another commit.
With this patch, the xfstests generic/074 test completes in 226s
instead of 242s
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The flexfiles layout in particular, seems to want to poke around in the
O_DIRECT flags when retransmitting.
This patch sets up an interface to allow it to call back into O_DIRECT
to handle retransmission correctly. It also fixes a potential bug whereby
we could change the behaviour of O_DIRECT if an error is already pending.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Jeff reports seeing an Oops in ff_layout_alloc_lseg. Turns out
copy+paste has played cruel tricks on a nested loop.
Reported-by: Jeff Layton <jeff.layton@primarydata.com>
Cc: stable@vger.kernel.org # 4.3+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If a NFSv4 client uses the cache_consistency_bitmask in order to
request only information about the change attribute, timestamps and
size, then it has not revalidated all attributes, and hence the
attribute timeout timestamp should not be updated.
Reported-by: Donald Buczek <buczek@molgen.mpg.de>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Donald Buczek reports that NFS clients can also report incorrect
results for access() due to lack of revalidation of attributes
before calling execute_ok().
Looking closely, it seems chdir() is afflicted with the same problem.
Fix is to ensure we call nfs_revalidate_inode_rcu() or
nfs_revalidate_inode() as appropriate before deciding to trust
execute_ok().
Reported-by: Donald Buczek <buczek@molgen.mpg.de>
Link: http://lkml.kernel.org/r/1451331530-3748-1-git-send-email-buczek@molgen.mpg.de
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* flexfiles:
pNFS/flexfiles: Ensure we record layoutstats even if RPC is terminated early
pNFS: Add flag to track if we've called nfs4_ff_layout_stat_io_start_read/write
pNFS/flexfiles: Fix a statistics gathering imbalance
pNFS/flexfiles: Don't mark the entire layout as failed, when returning it
pNFS/flexfiles: Don't prevent flexfiles client from retrying LAYOUTGET
pnfs/flexfiles: count io stat in rpc_count_stats callback
pnfs/flexfiles: do not mark delay-like status as DS failure
NFS41: map NFS4ERR_LAYOUTUNAVAILABLE to ENODATA
nfs: only remove page from mapping if launder_page fails
nfs: handle request add failure properly
nfs: centralize pgio error cleanup
nfs: clean up rest of reqs when failing to add one
NFS41: pop some layoutget errors to application
pNFS/flexfiles: Support server-supplied layoutstats sampling period
If the client is promising to return the layout ASAP, then there is no
need to return DELAY and have the server retry. Instead default to the
normal procedure described in RFC5661.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The RFC requires us to check if the server is recalling a stateid that we
haven't yet received. If so, tell it to wait.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If the client needs to delay the layout callback, then speed up the recall
process by marking the remaining layout segments to be actively returned
by the client.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This ensures that we don't reuse the stateid if a layout return or
implied layout return means that we've returned all layout segments
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If we're unable to perform the layoutget due to an invalid open stateid
or a bulk recall, ensure that we return the error so that the caller
can decide on an appropriate action.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Currently, we will only record the layoutstats correctly if the
RPC call successfully obtains a slot. If we exit before that
happens, then we may find ourselves starting the busy timer through
the call in ff_layout_(read|write)_prepare_layoutstats, but never stopping it.
The same thing happens if we're doing DA-DS.
The fix is to ensure that we catch these cases in the rpc_release()
callback.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
When we replay a failed read, write or commit to the dataserver, we
need to ensure that we call ff_layout_read_prepare_v3(),
ff_layout_write_prepare_v3 or ff_layout_commit_prepare_v3() so that we
reset the statistics.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
In pNFS/flexfiles, we want to return the layout without necessarily marking
it as having completely failed. We therefore move the call to
pnfs_layout_io_set_failed() out of pnfs_error_mark_layout_for_return(),
and then ensura that pNFS/files layout calls it separately.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Fix a bug in which flexfiles clients are falling back to I/O through the
MDS even when the FF_FLAGS_NO_IO_THRU_MDS flag is set.
The flexfiles client will always report errors through the LAYOUTRETURN
and/or LAYOUTERROR mechanisms, so it should normally be safe for it
to retry the LAYOUTGET until it fails or succeeds.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
