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2015-01-21NFS: Fix use of nfs_attr_use_mounted_on_fileid()Anna Schumaker
This function call was being optimized out during nfs_fhget(), leading to situations where we have a valid fileid but still want to use the mounted_on_fileid. For example, imagine we have our server configured like this: server % df Filesystem Size Used Avail Use% Mounted on /dev/vda1 9.1G 6.5G 1.9G 78% / /dev/vdb1 487M 2.3M 456M 1% /exports /dev/vdc1 487M 2.3M 456M 1% /exports/vol1 /dev/vdd1 487M 2.3M 456M 1% /exports/vol2 If our client mounts /exports and tries to do a "chown -R" across the entire mountpoint, we will get a nasty message warning us about a circular directory structure. Running chown with strace tells me that each directory has the same device and inode number: newfstatat(AT_FDCWD, "/nfs/", {st_dev=makedev(0, 38), st_ino=2, ...}) = 0 newfstatat(4, "vol1", {st_dev=makedev(0, 38), st_ino=2, ...}) = 0 newfstatat(4, "vol2", {st_dev=makedev(0, 38), st_ino=2, ...}) = 0 With this patch the mounted_on_fileid values are used for st_ino, so the directory loop warning isn't reported. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-21NFSv4.1: Fix an Oops in nfs41_walk_client_listTrond Myklebust
If we start state recovery on a client that failed to initialise correctly, then we are very likely to Oops. Reported-by: "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de> Link: http://lkml.kernel.org/r/130621862.279655.1421851650684.JavaMail.zimbra@desy.de Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-21nfs: fix dio deadlock when O_DIRECT flag is flippedPeng Tao
We only support swap file calling nfs_direct_IO. However, application might be able to get to nfs_direct_IO if it toggles O_DIRECT flag during IO and it can deadlock because we grab inode->i_mutex in nfs_file_direct_write(). So return 0 for such case. Then the generic layer will fall back to buffer IO. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-05NFSv4: Remove incorrect check in can_open_delegated()Trond Myklebust
Remove an incorrect check for NFS_DELEGATION_NEED_RECLAIM in can_open_delegated(). We are allowed to cache opens even in a situation where we're doing reboot recovery. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-05NFS: Ignore transport protocol when detecting server trunkingChuck Lever
Detect server trunking across transport protocols. Otherwise, an RDMA mount and a TCP mount of the same server will end up with separate nfs_clients using the same clientid4. Reported-by: Dai Ngo <dai.ngo@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-05NFSv4/v4.1: Verify the client owner id during trunking detectionTrond Myklebust
While we normally expect the NFSv4 client to always send the same client owner to all servers, there are a couple of situations where that is not the case: 1) In NFSv4.0, switching between use of '-omigration' and not will cause the kernel to switch between using the non-uniform and uniform client strings. 2) In NFSv4.1, or NFSv4.0 when using uniform client strings, if the uniquifier string is suddenly changed. This patch will catch those situations by checking the client owner id in the trunking detection code, and will do the right thing if it notices that the strings differ. Cc: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-05NFSv4: Cache the NFSv4/v4.1 client owner_id in the struct nfs_clientTrond Myklebust
Ensure that we cache the NFSv4/v4.1 client owner_id so that we can verify it when we're doing trunking detection. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-01-05NFSv4.1: Fix client id trunking on LinuxTrond Myklebust
Currently, our trunking code will check for session trunking, but will fail to detect client id trunking. This is a problem, because it means that the client will fail to recognise that the two connections represent shared state, even if they do not permit a shared session. By removing the check for the server minor id, and only checking the major id, we will end up doing the right thing in both cases: we close down the new nfs_client and fall back to using the existing one. Fixes: 05f4c350ee02e ("NFS: Discover NFSv4 server trunking when mounting") Cc: Chuck Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org # 3.7.x Tested-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-12-10Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull VFS changes from Al Viro: "First pile out of several (there _definitely_ will be more). Stuff in this one: - unification of d_splice_alias()/d_materialize_unique() - iov_iter rewrite - killing a bunch of ->f_path.dentry users (and f_dentry macro). Getting that completed will make life much simpler for unionmount/overlayfs, since then we'll be able to limit the places sensitive to file _dentry_ to reasonably few. Which allows to have file_inode(file) pointing to inode in a covered layer, with dentry pointing to (negative) dentry in union one. Still not complete, but much closer now. - crapectomy in lustre (dead code removal, mostly) - "let's make seq_printf return nothing" preparations - assorted cleanups and fixes There _definitely_ will be more piles" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) copy_from_iter_nocache() new helper: iov_iter_kvec() csum_and_copy_..._iter() iov_iter.c: handle ITER_KVEC directly iov_iter.c: convert copy_to_iter() to iterate_and_advance iov_iter.c: convert copy_from_iter() to iterate_and_advance iov_iter.c: get rid of bvec_copy_page_{to,from}_iter() iov_iter.c: convert iov_iter_zero() to iterate_and_advance iov_iter.c: convert iov_iter_get_pages_alloc() to iterate_all_kinds iov_iter.c: convert iov_iter_get_pages() to iterate_all_kinds iov_iter.c: convert iov_iter_npages() to iterate_all_kinds iov_iter.c: iterate_and_advance iov_iter.c: macros for iterating over iov_iter kill f_dentry macro dcache: fix kmemcheck warning in switch_names new helper: audit_file() nfsd_vfs_write(): use file_inode() ncpfs: use file_inode() kill f_dentry uses lockd: get rid of ->f_path.dentry->d_sb ...
2014-12-08Merge branch 'iov_iter' into for-nextAl Viro
2014-11-26Merge tag 'nfs-cel-for-3.19' of ↵Trond Myklebust
git://git.linux-nfs.org/projects/anna/nfs-rdma into linux-next Pull pull additional NFS client changes for 3.19 from Anna Schumaker: "NFS: Generic client side changes from Chuck These patches fixes for iostats and SETCLIENTID in addition to cleaning up the nfs4_init_callback() function. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>" * tag 'nfs-cel-for-3.19' of git://git.linux-nfs.org/projects/anna/nfs-rdma: NFS: Clean up nfs4_init_callback() NFS: SETCLIENTID XDR buffer sizes are incorrect SUNRPC: serialize iostats updates
2014-11-25nfs: Add DEALLOCATE supportAnna Schumaker
This patch adds support for using the NFS v4.2 operation DEALLOCATE to punch holes in a file. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-25nfs: Add ALLOCATE supportAnna Schumaker
This patch adds support for using the NFS v4.2 operation ALLOCATE to preallocate data in a file. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-25NFS: Clean up nfs4_init_callback()Chuck Lever
nfs4_init_callback() is never invoked for NFS versions other than 4. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2014-11-25NFS: SETCLIENTID XDR buffer sizes are incorrectChuck Lever
Use the correct calculation of the maximum size of a clientaddr4 when encoding and decoding SETCLIENTID operations. clientaddr4 is defined in section 2.2.10 of RFC3530bis-31. The usage in encode_setclientid_maxsz is missing the 4-byte length in both strings, but is otherwise correct. decode_setclientid_maxsz simply asks for a page of receive buffer space, which is unnecessarily large (more than 4KB). Note that a SETCLIENTID reply is either clientid+verifier, or clientaddr4, depending on the returned NFS status. It doesn't hurt to allocate enough space for both. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2014-11-24nfs: define nfs_inc_fscache_stats and using it as possibleLi RongQing
Define and use nfs_inc_fscache_stats when plus one, which can save to pass one parameter. Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24nfs: replace nfs_add_stats with nfs_inc_stats when add oneLi RongQing
Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24NFS: Deletion of unnecessary checks before the function call "nfs_put_client"Markus Elfring
The nfs_put_client() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24nfs41: fix nfs4_proc_layoutget error handlingPeng Tao
nfs4_layoutget_release() drops layout hdr refcnt. Grab the refcnt early so that it is safe to call .release in case nfs4_alloc_pages fails. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Fixes: a47970ff78147 ("NFSv4.1: Hold reference to layout hdr in layoutget") Cc: stable@vger.kernel.org # 3.9+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24NFS: fix subtle change in COMMIT behaviorWeston Andros Adamson
Recent work in the pgio layer made it possible for there to be more than one request per page. This caused a subtle change in commit behavior, because write.c:nfs_commit_unstable_pages compares the number of *pages* waiting for writeback against the number of requests on a commit list to choose when to send a COMMIT in a non-blocking flush. This is probably hard to hit in normal operation - you have to be using rsize/wsize < PAGE_SIZE, or pnfs with lots of boundaries that are not page aligned to have a noticeable change in behavior. Signed-off-by: Weston Andros Adamson <dros@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24pnfs/blocklayout: fix end calculation in pnfs_num_cont_bytesChristoph Hellwig
Use the number of pages in the pagecache mapping instead of the number of pnfs requests which is only slightly related. Reported-by: Weston Andros Adamson <dros@primarydata.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24NFS: Use nfs_server_capable() for checknig NFS_CAP_SEEKAnna Schumaker
This should make the code easier to maintain in the future. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24nfs: Remove dead case from nfs4_map_errors()Jan Kara
NFS4ERR_ACCESS has number 13 and thus is matched and returned immediately at the beginning of nfs4_map_errors() and there's no point in checking it later. Coverity-id: 733891 Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-19rpc_pipefs.c: get rid of f_dentryAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19assorted conversions to %p[dD]Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19switch d_materialise_unique() users to d_splice_alias()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-12NFS: Don't try to reclaim delegation open state if recovery failedTrond Myklebust
If state recovery failed, then we should not attempt to reclaim delegated state. http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12NFSv4: Ensure that we call FREE_STATEID when NFSv4.x stateids are revokedTrond Myklebust
NFSv4.x (x>0) requires us to call TEST_STATEID+FREE_STATEID if a stateid is revoked. We will currently fail to do this if the stateid is a delegation. http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12NFSv4: Fix races between nfs_remove_bad_delegation() and delegation returnTrond Myklebust
Any attempt to call nfs_remove_bad_delegation() while a delegation is being returned is currently a no-op. This means that we can end up looping forever in nfs_end_delegation_return() if something causes the delegation to be revoked. This patch adds a mechanism whereby the state recovery code can communicate to the delegation return code that the delegation is no longer valid and that it should not be used when reclaiming state. It also changes the return value for nfs4_handle_delegation_recall_error() to ensure that nfs_end_delegation_return() does not reattempt the lock reclaim before state recovery is done. http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12NFSv4.1: nfs41_clear_delegation_stateid shouldn't trust NFS_DELEGATED_STATETrond Myklebust
This patch removes the assumption made previously, that we only need to check the delegation stateid when it matches the stateid on a cached open. If we believe that we hold a delegation for this file, then we must assume that its stateid may have been revoked or expired too. If we don't test it then our state recovery process may end up caching open/lock state in a situation where it should not. We therefore rename the function nfs41_clear_delegation_stateid as nfs41_check_delegation_stateid, and change it to always run through the delegation stateid test and recovery process as outlined in RFC5661. http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12NFSv4: Ensure that we remove NFSv4.0 delegations when state has expiredTrond Myklebust
NFSv4.0 does not have TEST_STATEID/FREE_STATEID functionality, so unlike NFSv4.1, the recovery procedure when stateids have expired or have been revoked requires us to just forget the delegation. http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12NFS: SEEK is an NFS v4.2 featureAnna Schumaker
Somehow the nfs_v4_1_minor_ops had the NFS_CAP_SEEK flag set, enabling SEEK over v4.1. This is wrong, and can make servers crash. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12nfs: Fix use of uninitialized variable in nfs_getattr()Jan Kara
Variable 'err' needn't be initialized when nfs_getattr() uses it to check whether it should call generic_fillattr() or not. That can result in spurious error returns. Initialize 'err' properly. Signed-off-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12nfs: Remove bogus assignmentJan Kara
Commit 3a6fd1f004fc (pnfs/blocklayout: remove read-modify-write handling in bl_write_pagelist) introduced a bogus assignment pg_index = pg_index in variable initialization. AFAICS it's just a typo so remove it. Spotted by Coverity (id 1248711). CC: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12nfs: remove spurious WARN_ON_ONCE in write pathWeston Andros Adamson
This WARN_ON_ONCE was supposed to catch reference counting bugs, but can trigger in inappropriate situations. This was reproducible using NFSv2 on an architecture with 64K pages -- we verified that it was not a reference counting bug and the warning was safe to ignore. Reported-by: Will Deacon <will.deacon@arm.com> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Weston Andros Adamson <dros@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12pnfs/blocklayout: serialize GETDEVICEINFO callsChristoph Hellwig
The rpc_pipefs code isn't thread safe, leading to occasional use after frees when running xfstests generic/241 (dbench). Signed-off-by: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/1411740170-18611-2-git-send-email-hch@lst.de Cc: stable@vger.kernel.org # 3.17.x Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-12nfs: fix pnfs direct write memory leakPeng Tao
For pNFS direct writes, layout driver may dynamically allocate ds_cinfo.buckets. So we need to take care to free them when freeing dreq. Ideally this needs to be done inside layout driver where ds_cinfo.buckets are allocated. But buckets are attached to dreq and reused across LD IO iterations. So I feel it's OK to free them in the generic layer. Cc: stable@vger.kernel.org [v3.4+] Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-04Revert "NFS: nfs4_do_open should add negative results to the dcache."Trond Myklebust
This reverts commit 4fa2c54b5198d09607a534e2fd436581064587ed.
2014-11-04Revert "NFS: remove BUG possibility in nfs4_open_and_get_state"Trond Myklebust
This reverts commit f39c01047994e66e7f3d89ddb4c6141f23349d8d.
2014-11-04NFSv4: Ensure nfs_atomic_open set the dentry verifier on ENOENTTrond Myklebust
If the OPEN rpc call to the server fails with an ENOENT call, nfs_atomic_open will create a negative dentry for that file, however it currently fails to call nfs_set_verifier(), thus causing the dentry to be immediately revalidated on the next call to nfs_lookup_revalidate() instead of following the usual lookup caching rules. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-03move d_rcu from overlapping d_child to overlapping d_aliasAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-21Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osdLinus Torvalds
Pull email address change from Boaz Harrosh. * 'for-linus' of git://git.open-osd.org/linux-open-osd: Boaz Harrosh - fix email in Documentation Boaz Harrosh - Fix broken email address MAINTAINERS: Change Boaz Harrosh's email
2014-10-19Boaz Harrosh - Fix broken email addressBoaz Harrosh
I no longer have access to the Panasas email. So change to an email that can always reach me. Signed-off-by: Boaz Harrosh <ooo@electrozaur.com>
2014-10-18Merge tag 'nfs-for-3.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client updates from Trond Myklebust: "Highlights include: Stable fixes: - fix an uninitialised pointer Oops in the writeback error path - fix a bogus warning (and early exit from the loop) in nfs_generic_pgio() Features: - Add NFSv4.2 SEEK feature and client support for lseek(SEEK_HOLE/SEEK_DATA) Other fixes: - pnfs: replace broken pnfs_put_lseg_async - Remove dead prototype for nfs4_insert_deviceid_node" * tag 'nfs-for-3.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS: Fix a bogus warning in nfs_generic_pgio NFS: Fix an uninitialised pointer Oops in the writeback error path NFSv4.1/pnfs: replace broken pnfs_put_lseg_async NFSv4: Remove dead prototype for nfs4_insert_deviceid_node() NFS: Implement SEEK
2014-10-18Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull core block layer changes from Jens Axboe: "This is the core block IO pull request for 3.18. Apart from the new and improved flush machinery for blk-mq, this is all mostly bug fixes and cleanups. - blk-mq timeout updates and fixes from Christoph. - Removal of REQ_END, also from Christoph. We pass it through the ->queue_rq() hook for blk-mq instead, freeing up one of the request bits. The space was overly tight on 32-bit, so Martin also killed REQ_KERNEL since it's no longer used. - blk integrity updates and fixes from Martin and Gu Zheng. - Update to the flush machinery for blk-mq from Ming Lei. Now we have a per hardware context flush request, which both cleans up the code should scale better for flush intensive workloads on blk-mq. - Improve the error printing, from Rob Elliott. - Backing device improvements and cleanups from Tejun. - Fixup of a misplaced rq_complete() tracepoint from Hannes. - Make blk_get_request() return error pointers, fixing up issues where we NULL deref when a device goes bad or missing. From Joe Lawrence. - Prep work for drastically reducing the memory consumption of dm devices from Junichi Nomura. This allows creating clone bio sets without preallocating a lot of memory. - Fix a blk-mq hang on certain combinations of queue depths and hardware queues from me. - Limit memory consumption for blk-mq devices for crash dump scenarios and drivers that use crazy high depths (certain SCSI shared tag setups). We now just use a single queue and limited depth for that" * 'for-3.18/core' of git://git.kernel.dk/linux-block: (58 commits) block: Remove REQ_KERNEL blk-mq: allocate cpumask on the home node bio-integrity: remove the needless fail handle of bip_slab creating block: include func name in __get_request prints block: make blk_update_request print prefix match ratelimited prefix blk-merge: don't compute bi_phys_segments from bi_vcnt for cloned bio block: fix alignment_offset math that assumes io_min is a power-of-2 blk-mq: Make bt_clear_tag() easier to read blk-mq: fix potential hang if rolling wakeup depth is too high block: add bioset_create_nobvec() block: use bio_clone_fast() in blk_rq_prep_clone() block: misplaced rq_complete tracepoint sd: Honor block layer integrity handling flags block: Replace strnicmp with strncasecmp block: Add T10 Protection Information functions block: Don't merge requests if integrity flags differ block: Integrity checksum flag block: Relocate bio integrity flags block: Add a disk flag to block integrity profile block: Add prefix to block integrity profile flags ...
2014-10-14block: Remove REQ_KERNELMartin K. Petersen
REQ_KERNEL is no longer used. Remove it and drop the redundant uio argument to nfs_file_direct_{read,write}. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@infradead.org> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-10-13NFS: Fix a bogus warning in nfs_generic_pgioTrond Myklebust
It is OK for pageused == pagecount in the loop, as long as we don't add another entry to the *pages array. Move the test so that it only triggers in that case. Reported-by: Steve Dickson <SteveD@redhat.com> Fixes: bba5c1887a92 (nfs: disallow duplicate pages in pgio page vectors) Cc: Weston Andros Adamson <dros@primarydata.com> Cc: stable@vger.kernel.org # 3.16.x Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-10-13NFS: Fix an uninitialised pointer Oops in the writeback error pathTrond Myklebust
SteveD reports the following Oops: RIP: 0010:[<ffffffffa053461d>] [<ffffffffa053461d>] __put_nfs_open_context+0x1d/0x100 [nfs] RSP: 0018:ffff880fed687b90 EFLAGS: 00010286 RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff880fed687bc0 R08: 0000000000000092 R09: 000000000000047a R10: 0000000000000000 R11: ffff880fed6878d6 R12: ffff880fed687d20 R13: ffff880fed687d20 R14: 0000000000000070 R15: ffffea000aa33ec0 FS: 00007fce290f0740(0000) GS:ffff8807ffc60000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000070 CR3: 00000007f2e79000 CR4: 00000000000007e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Stack: 0000000000000000 ffff880036c5e510 ffff880fed687d20 ffff880fed687d20 ffff880036c5e200 ffffea000aa33ec0 ffff880fed687bd0 ffffffffa0534710 ffff880fed687be8 ffffffffa053d5f0 ffff880036c5e200 ffff880fed687c08 Call Trace: [<ffffffffa0534710>] put_nfs_open_context+0x10/0x20 [nfs] [<ffffffffa053d5f0>] nfs_pgio_data_destroy+0x20/0x40 [nfs] [<ffffffffa053d672>] nfs_pgio_error+0x22/0x40 [nfs] [<ffffffffa053d8f4>] nfs_generic_pgio+0x74/0x2e0 [nfs] [<ffffffffa06b18c3>] pnfs_generic_pg_writepages+0x63/0x210 [nfsv4] [<ffffffffa053d579>] nfs_pageio_doio+0x19/0x50 [nfs] [<ffffffffa053eb84>] nfs_pageio_complete+0x24/0x30 [nfs] [<ffffffffa053cb25>] nfs_direct_write_schedule_iovec+0x115/0x1f0 [nfs] [<ffffffffa053675f>] ? nfs_get_lock_context+0x4f/0x120 [nfs] [<ffffffffa053d252>] nfs_file_direct_write+0x262/0x420 [nfs] [<ffffffffa0532d91>] nfs_file_write+0x131/0x1d0 [nfs] [<ffffffffa0532c60>] ? nfs_need_sync_write.isra.17+0x40/0x40 [nfs] [<ffffffff812127b8>] do_io_submit+0x3b8/0x840 [<ffffffff81212c50>] SyS_io_submit+0x10/0x20 [<ffffffff81610f29>] system_call_fastpath+0x16/0x1b This is due to the calls to nfs_pgio_error() in nfs_generic_pgio(), which happen before the nfs_pgio_header's open context is referenced in nfs_pgio_rpcsetup(). Reported-by: Steve Dickson <SteveD@redhat.com> Cc: stable@vger.kernel.org # 3.16.x Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-10-13Merge branch 'sched-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler updates from Ingo Molnar: "The main changes in this cycle were: - Optimized support for Intel "Cluster-on-Die" (CoD) topologies (Dave Hansen) - Various sched/idle refinements for better idle handling (Nicolas Pitre, Daniel Lezcano, Chuansheng Liu, Vincent Guittot) - sched/numa updates and optimizations (Rik van Riel) - sysbench speedup (Vincent Guittot) - capacity calculation cleanups/refactoring (Vincent Guittot) - Various cleanups to thread group iteration (Oleg Nesterov) - Double-rq-lock removal optimization and various refactorings (Kirill Tkhai) - various sched/deadline fixes ... and lots of other changes" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (72 commits) sched/dl: Use dl_bw_of() under rcu_read_lock_sched() sched/fair: Delete resched_cpu() from idle_balance() sched, time: Fix build error with 64 bit cputime_t on 32 bit systems sched: Improve sysbench performance by fixing spurious active migration sched/x86: Fix up typo in topology detection x86, sched: Add new topology for multi-NUMA-node CPUs sched/rt: Use resched_curr() in task_tick_rt() sched: Use rq->rd in sched_setaffinity() under RCU read lock sched: cleanup: Rename 'out_unlock' to 'out_free_new_mask' sched: Use dl_bw_of() under RCU read lock sched/fair: Remove duplicate code from can_migrate_task() sched, mips, ia64: Remove __ARCH_WANT_UNLOCKED_CTXSW sched: print_rq(): Don't use tasklist_lock sched: normalize_rt_tasks(): Don't use _irqsave for tasklist_lock, use task_rq_lock() sched: Fix the task-group check in tg_has_rt_tasks() sched/fair: Leverage the idle state info when choosing the "idlest" cpu sched: Let the scheduler see CPU idle states sched/deadline: Fix inter- exclusive cpusets migrations sched/deadline: Clear dl_entity params when setscheduling to different class sched/numa: Kill the wrong/dead TASK_DEAD check in task_numa_fault() ...
2014-10-13Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "The big thing in this pile is Eric's unmount-on-rmdir series; we finally have everything we need for that. The final piece of prereqs is delayed mntput() - now filesystem shutdown always happens on shallow stack. Other than that, we have several new primitives for iov_iter (Matt Wilcox, culled from his XIP-related series) pushing the conversion to ->read_iter()/ ->write_iter() a bit more, a bunch of fs/dcache.c cleanups and fixes (including the external name refcounting, which gives consistent behaviour of d_move() wrt procfs symlinks for long and short names alike) and assorted cleanups and fixes all over the place. This is just the first pile; there's a lot of stuff from various people that ought to go in this window. Starting with unionmount/overlayfs mess... ;-/" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (60 commits) fs/file_table.c: Update alloc_file() comment vfs: Deduplicate code shared by xattr system calls operating on paths reiserfs: remove pointless forward declaration of struct nameidata don't need that forward declaration of struct nameidata in dcache.h anymore take dname_external() into fs/dcache.c let path_init() failures treated the same way as subsequent link_path_walk() fix misuses of f_count() in ppp and netlink ncpfs: use list_for_each_entry() for d_subdirs walk vfs: move getname() from callers to do_mount() gfs2_atomic_open(): skip lookups on hashed dentry [infiniband] remove pointless assignments gadgetfs: saner API for gadgetfs_create_file() f_fs: saner API for ffs_sb_create_file() jfs: don't hash direct inode [s390] remove pointless assignment of ->f_op in vmlogrdr ->open() ecryptfs: ->f_op is never NULL android: ->f_op is never NULL nouveau: __iomem misannotations missing annotation in fs/file.c fs: namespace: suppress 'may be used uninitialized' warnings ...
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