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2017-05-10Merge tag 'nfsd-4.12' of git://linux-nfs.org/~bfields/linuxLinus Torvalds1-9/+17
Pull nfsd updates from Bruce Fields: "Another RDMA update from Chuck Lever, and a bunch of miscellaneous bugfixes" * tag 'nfsd-4.12' of git://linux-nfs.org/~bfields/linux: (26 commits) nfsd: Fix up the "supattr_exclcreat" attributes nfsd: encoders mustn't use unitialized values in error cases nfsd: fix undefined behavior in nfsd4_layout_verify lockd: fix lockd shutdown race NFSv4: Fix callback server shutdown SUNRPC: Refactor svc_set_num_threads() NFSv4.x/callback: Create the callback service through svc_create_pooled lockd: remove redundant check on block svcrdma: Clean out old XDR encoders svcrdma: Remove the req_map cache svcrdma: Remove unused RDMA Write completion handler svcrdma: Reduce size of sge array in struct svc_rdma_op_ctxt svcrdma: Clean up RPC-over-RDMA backchannel reply processing svcrdma: Report Write/Reply chunk overruns svcrdma: Clean up RDMA_ERROR path svcrdma: Use rdma_rw API in RPC reply path svcrdma: Introduce local rdma_rw API helpers svcrdma: Clean up svc_rdma_get_inv_rkey() svcrdma: Add helper to save pages under I/O svcrdma: Eliminate RPCRDMA_SQ_DEPTH_MULT ...
2017-05-10Merge tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds35-2761/+590
Pull NFS client updates from Trond Myklebust: "Highlights include: Stable bugfixes: - Fix use after free in write error path - Use GFP_NOIO for two allocations in writeback - Fix a hang in OPEN related to server reboot - Check the result of nfs4_pnfs_ds_connect - Fix an rcu lock leak Features: - Removal of the unmaintained and unused OSD pNFS layout - Cleanup and removal of lots of unnecessary dprintk()s - Cleanup and removal of some memory failure paths now that GFP_NOFS is guaranteed to never fail. - Remove the v3-only data server limitation on pNFS/flexfiles Bugfixes: - RPC/RDMA connection handling bugfixes - Copy offload: fixes to ensure the copied data is COMMITed to disk. - Readdir: switch back to using the ->iterate VFS interface - File locking fixes from Ben Coddington - Various use-after-free and deadlock issues in pNFS - Write path bugfixes" * tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (89 commits) pNFS/flexfiles: Always attempt to call layoutstats when flexfiles is enabled NFSv4.1: Work around a Linux server bug... NFS append COMMIT after synchronous COPY NFSv4: Fix exclusive create attributes encoding NFSv4: Fix an rcu lock leak nfs: use kmap/kunmap directly NFS: always treat the invocation of nfs_getattr as cache hit when noac is on Fix nfs_client refcounting if kmalloc fails in nfs4_proc_exchange_id and nfs4_proc_async_renew NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commits pNFS: Fix a typo in pnfs_generic_alloc_ds_commits pNFS: Fix a deadlock when coalescing writes and returning the layout pNFS: Don't clear the layout return info if there are segments to return pNFS: Ensure we commit the layout if it has been invalidated pNFS: Don't send COMMITs to the DSes if the server invalidated our layout pNFS/flexfiles: Fix up the ff_layout_write_pagelist failure path pNFS: Ensure we check layout validity before marking it for return NFS4.1 handle interrupted slot reuse from ERR_DELAY NFSv4: check return value of xdr_inline_decode nfs/filelayout: fix NULL pointer dereference in fl_pnfs_update_layout() ...
2017-05-09pNFS/flexfiles: Always attempt to call layoutstats when flexfiles is enabledTrond Myklebust1-0/+11
Layoutstats is always desirable when using the flexfiles driver, so we should enable it if that driver is being loaded. It is safe to do so, because even when the mount specifies NFSv4.1, we will turn it off if the server tells us it is unsupported. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-09NFSv4.1: Work around a Linux server bug...Trond Myklebust1-0/+6
It turns out the Linux server has a bug in its implementation of supattr_exclcreat; it returns the set of all attributes, whether or not they are supported by minor version 1. In order to avoid a regression, we therefore apply the supported_attrs as a mask on top of whatever the server sent us. Reported-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-08NFS append COMMIT after synchronous COPYOlga Kornievskaia4-39/+35
Instead of messing with the commit path which has been causing issues, add a COMMIT op after the COPY and ask for stable copies in the first space. It saves a round trip, since after the COPY, the client sends a COMMIT anyway. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-08NFSv4: Fix exclusive create attributes encodingTrond Myklebust1-40/+35
When using NFS4_CREATE_EXCLUSIVE4_1 mode, the client will overestimate the amount of space that it needs for the attributes because it does so before checking whether or not the server supports a given attribute. Fix by checking the attribute mask earlier. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-08NFSv4: Fix an rcu lock leakTrond Myklebust1-2/+4
The intention in the original patch was to release the lock when we put the inode, however something got screwed up. Reported-by: Jason Yan <yanaijie@huawei.com> Fixes: 7b410d9ce460f ("pNFS: Delay getting the layout header in..") Cc: stable@vger.kernel.org # v4.10+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-05nfs: use kmap/kunmap directlyFabian Frederick1-55/+12
This patch removes useless nfs_readdir_get_array() and nfs_readdir_release_array() as suggested by Trond Myklebust nfs_readdir() calls nfs_revalidate_mapping() before readdir_search_pagecache() , nfs_do_filldir(), uncached_readdir() so mapping should be correct. While kmap() can't fail, all subsequent error checks were removed as well as unused labels. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-05NFS: always treat the invocation of nfs_getattr as cache hit when noac is onHou Tao1-1/+4
When using 'ls -l' to display a large directory, if noac option is used, in function nfs_getattr() nfs_need_revalidate_inode() will always be true for NFSv3 and the nfs_entry cache of the directory will be flushed. The flush will lead to a fully reread of the directory entries from server. To prevent the unnecessary RPCs, we need to check whether or not the noac option is used, and always report the invocation of nfs_getattr() as cache hit instead cache miss when it's on. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-05Fix nfs_client refcounting if kmalloc fails in nfs4_proc_exchange_id and nfs4_proc_async_renewDave Wysochanski1-2/+6
If memory allocation fails for the callback data, we need to put the nfs_client or we end up with an elevated refcount. Signed-off-by: Dave Wysochanski <dwysocha@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-05NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSIONTrond Myklebust2-4/+13
If the server returns NFS4ERR_CONN_NOT_BOUND_TO_SESSION because we are trunking, then RECLAIM_COMPLETE must handle that by calling nfs4_schedule_session_recovery() and then retrying. Reported-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Tested-by: Chuck Lever <chuck.lever@oracle.com>
2017-05-04nfs: Fix bdi handling for cloned superblocksJan Kara2-21/+13
In commit 0d3b12584972 "nfs: Convert to separately allocated bdi" I have wrongly cloned bdi reference in nfs_clone_super(). Further inspection has shown that originally the code was actually allocating a new bdi (in ->clone_server callback) which was later registered in nfs_fs_mount_common() and used for sb->s_bdi in nfs_initialise_sb(). This could later result in bdi for the original superblock not getting unregistered when that superblock got shutdown (as the cloned sb still held bdi reference) and later when a new superblock was created under the same anonymous device number, a clash in sysfs has happened on bdi registration: ------------[ cut here ]------------ WARNING: CPU: 1 PID: 10284 at /linux-next/fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x74 sysfs: cannot create duplicate filename '/devices/virtual/bdi/0:32' Modules linked in: axp20x_usb_power gpio_axp209 nvmem_sunxi_sid sun4i_dma sun4i_ss virt_dma CPU: 1 PID: 10284 Comm: mount.nfs Not tainted 4.11.0-rc4+ #14 Hardware name: Allwinner sun7i (A20) Family [<c010f19c>] (unwind_backtrace) from [<c010bc74>] (show_stack+0x10/0x14) [<c010bc74>] (show_stack) from [<c03c6e24>] (dump_stack+0x78/0x8c) [<c03c6e24>] (dump_stack) from [<c0122200>] (__warn+0xe8/0x100) [<c0122200>] (__warn) from [<c0122250>] (warn_slowpath_fmt+0x38/0x48) [<c0122250>] (warn_slowpath_fmt) from [<c02ac178>] (sysfs_warn_dup+0x64/0x74) [<c02ac178>] (sysfs_warn_dup) from [<c02ac254>] (sysfs_create_dir_ns+0x84/0x94) [<c02ac254>] (sysfs_create_dir_ns) from [<c03c8b8c>] (kobject_add_internal+0x9c/0x2ec) [<c03c8b8c>] (kobject_add_internal) from [<c03c8e24>] (kobject_add+0x48/0x98) [<c03c8e24>] (kobject_add) from [<c048d75c>] (device_add+0xe4/0x5a0) [<c048d75c>] (device_add) from [<c048ddb4>] (device_create_groups_vargs+0xac/0xbc) [<c048ddb4>] (device_create_groups_vargs) from [<c048dde4>] (device_create_vargs+0x20/0x28) [<c048dde4>] (device_create_vargs) from [<c02075c8>] (bdi_register_va+0x44/0xfc) [<c02075c8>] (bdi_register_va) from [<c023d378>] (super_setup_bdi_name+0x48/0xa4) [<c023d378>] (super_setup_bdi_name) from [<c0312ef4>] (nfs_fill_super+0x1a4/0x204) [<c0312ef4>] (nfs_fill_super) from [<c03133f0>] (nfs_fs_mount_common+0x140/0x1e8) [<c03133f0>] (nfs_fs_mount_common) from [<c03335cc>] (nfs4_remote_mount+0x50/0x58) [<c03335cc>] (nfs4_remote_mount) from [<c023ef98>] (mount_fs+0x14/0xa4) [<c023ef98>] (mount_fs) from [<c025cba0>] (vfs_kern_mount+0x54/0x128) [<c025cba0>] (vfs_kern_mount) from [<c033352c>] (nfs_do_root_mount+0x80/0xa0) [<c033352c>] (nfs_do_root_mount) from [<c0333818>] (nfs4_try_mount+0x28/0x3c) [<c0333818>] (nfs4_try_mount) from [<c0313874>] (nfs_fs_mount+0x2cc/0x8c4) [<c0313874>] (nfs_fs_mount) from [<c023ef98>] (mount_fs+0x14/0xa4) [<c023ef98>] (mount_fs) from [<c025cba0>] (vfs_kern_mount+0x54/0x128) [<c025cba0>] (vfs_kern_mount) from [<c02600f0>] (do_mount+0x158/0xc7c) [<c02600f0>] (do_mount) from [<c0260f98>] (SyS_mount+0x8c/0xb4) [<c0260f98>] (SyS_mount) from [<c0107840>] (ret_fast_syscall+0x0/0x3c) Fix the problem by always creating new bdi for a superblock as we used to do. Reported-and-tested-by: Corentin Labbe <clabbe.montjoie@gmail.com> Fixes: 0d3b12584972ce5781179ad3f15cca3cdb5cae05 Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-05-03pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commitsFred Isaman1-1/+1
Signed-off-by: Fred Isaman <fred.isaman@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-02pNFS: Fix a typo in pnfs_generic_alloc_ds_commitsTrond Myklebust1-1/+1
If the layout segment is invalid, we want to just resend the remaining writes. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-02pNFS: Fix a deadlock when coalescing writes and returning the layoutTrond Myklebust1-2/+0
Consider the following deadlock: Process P1 Process P2 Process P3 ========== ========== ========== lock_page(page) lseg = pnfs_update_layout(inode) lo = NFS_I(inode)->layout pnfs_error_mark_layout_for_return(lo) lock_page(page) lseg = pnfs_update_layout(inode) In this scenario, - P1 has declared the layout to be in error, but P2 holds a reference to a layout segment on that inode, so the layoutreturn is deferred. - P2 is waiting for a page lock held by P3. - P3 is asking for a new layout segment, but is blocked waiting for the layoutreturn. The fix is to ensure that pnfs_error_mark_layout_for_return() does not set the NFS_LAYOUT_RETURN flag, which blocks P3. Instead, we allow the latter to call LAYOUTGET so that it can make progress and unblock P2. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-02pNFS: Don't clear the layout return info if there are segments to returnTrond Myklebust1-1/+7
In pnfs_clear_layoutreturn_info, ensure that we don't clear the layout return info if there are new segments queued for return due to, for instance, a race between a LAYOUTRETURN and a failed I/O attempt. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-05-01Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-blockLinus Torvalds4-35/+27
Pull block layer updates from Jens Axboe: - Add BFQ IO scheduler under the new blk-mq scheduling framework. BFQ was initially a fork of CFQ, but subsequently changed to implement fairness based on B-WF2Q+, a modified variant of WF2Q. BFQ is meant to be used on desktop type single drives, providing good fairness. From Paolo. - Add Kyber IO scheduler. This is a full multiqueue aware scheduler, using a scalable token based algorithm that throttles IO based on live completion IO stats, similary to blk-wbt. From Omar. - A series from Jan, moving users to separately allocated backing devices. This continues the work of separating backing device life times, solving various problems with hot removal. - A series of updates for lightnvm, mostly from Javier. Includes a 'pblk' target that exposes an open channel SSD as a physical block device. - A series of fixes and improvements for nbd from Josef. - A series from Omar, removing queue sharing between devices on mostly legacy drivers. This helps us clean up other bits, if we know that a queue only has a single device backing. This has been overdue for more than a decade. - Fixes for the blk-stats, and improvements to unify the stats and user windows. This both improves blk-wbt, and enables other users to register a need to receive IO stats for a device. From Omar. - blk-throttle improvements from Shaohua. This provides a scalable framework for implementing scalable priotization - particularly for blk-mq, but applicable to any type of block device. The interface is marked experimental for now. - Bucketized IO stats for IO polling from Stephen Bates. This improves efficiency of polled workloads in the presence of mixed block size IO. - A few fixes for opal, from Scott. - A few pulls for NVMe, including a lot of fixes for NVMe-over-fabrics. From a variety of folks, mostly Sagi and James Smart. - A series from Bart, improving our exposed info and capabilities from the blk-mq debugfs support. - A series from Christoph, cleaning up how handle WRITE_ZEROES. - A series from Christoph, cleaning up the block layer handling of how we track errors in a request. On top of being a nice cleanup, it also shrinks the size of struct request a bit. - Removal of mg_disk and hd (sorry Linus) by Christoph. The former was never used by platforms, and the latter has outlived it's usefulness. - Various little bug fixes and cleanups from a wide variety of folks. * 'for-4.12/block' of git://git.kernel.dk/linux-block: (329 commits) block: hide badblocks attribute by default blk-mq: unify hctx delay_work and run_work block: add kblock_mod_delayed_work_on() blk-mq: unify hctx delayed_run_work and run_work nbd: fix use after free on module unload MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O scheduler blk-mq-sched: alloate reserved tags out of normal pool mtip32xx: use runtime tag to initialize command header scsi: Implement blk_mq_ops.show_rq() blk-mq: Add blk_mq_ops.show_rq() blk-mq: Show operation, cmd_flags and rq_flags names blk-mq: Make blk_flags_show() callers append a newline character blk-mq: Move the "state" debugfs attribute one level down blk-mq: Unregister debugfs attributes earlier blk-mq: Only unregister hctxs for which registration succeeded blk-mq-debugfs: Rename functions for registering and unregistering the mq directory blk-mq: Let blk_mq_debugfs_register() look up the queue name blk-mq: Register <dev>/queue/mq after having registered <dev>/queue ide-pm: always pass 0 error to ide_complete_rq in ide_do_devset ide-pm: always pass 0 error to __blk_end_request_all ..
2017-04-29pNFS: Ensure we commit the layout if it has been invalidatedTrond Myklebust3-0/+5
If the layout is being invalidated on the server, then we must invoke nfs_commit_inode() to ensure any commits to the DS get cleared out. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-29pNFS: Don't send COMMITs to the DSes if the server invalidated our layoutTrond Myklebust1-0/+7
If the layout was invalidated, then assume we should requeue all the pending writes for the DS in question. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-29pNFS/flexfiles: Fix up the ff_layout_write_pagelist failure pathTrond Myklebust2-4/+21
If the attempt to write through pNFS fails, we need to use the same failure semantics as for the read path: If the FF_FLAGS_NO_IO_THRU_MDS flag is set or we have sufficient valid DSes, then we must retry through pNFS Fixes: d67ae825a59d ("pnfs/flexfiles: Add the FlexFile Layout Driver") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-28pNFS: Ensure we check layout validity before marking it for returnTrond Myklebust1-0/+4
pnfs_error_mark_layout_for_return needs to check that the layout is valid before calling pnfs_set_plh_return_info(). Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-28NFS4.1 handle interrupted slot reuse from ERR_DELAYOlga Kornievskaia1-1/+2
If the RPC slot was interrupted and server replied to the next operation on the "reused" slot with ERR_DELAY, don't clear out the "interrupted" flag until we properly recover. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-28NFSv4: check return value of xdr_inline_decodePan Bian1-0/+2
Function xdr_inline_decode() will return a NULL pointer if the input buffer does not have long enough buffer to decode nbytes of data. However, in function decode_op_map(), the return value of xdr_inline_decode() is not validated before it is used. This patch adds a check to the return value of xdr_inline_decode(). Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-28nfs/filelayout: fix NULL pointer dereference in fl_pnfs_update_layout()Artem Savkov1-3/+3
Calling pnfs_put_lset on an IS_ERR pointer results in a NULL pointer dereference like the one below. At the same time the check of retvalue of filelayout_check_deviceid() sets lseg to error, but does not free it before that. [ 3000.636161] BUG: unable to handle kernel NULL pointer dereference at 000000000000003c [ 3000.636970] IP: pnfs_put_lseg+0x29/0x100 [nfsv4] [ 3000.637420] PGD 4f23b067 [ 3000.637421] PUD 4a0f4067 [ 3000.637679] PMD 0 [ 3000.637937] [ 3000.638287] Oops: 0000 [#1] SMP [ 3000.638591] Modules linked in: nfs_layout_nfsv41_files nfsv3 nfnetlink_queue nfnetlink_log nfnetlink bluetooth rfkill rpcsec_gss_krb5 nfsv4 nfs fscache binfmt_misc arc4 md4 nls_utf8 cifs ccm dns_resolver rpcrdma ib_isert iscsi_target_mod ib_iser rdma_cm iw_cm libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib ib_ucm ib_uverbs ib_umad ib_cm ib_core nls_koi8_u nls_cp932 ts_kmp nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcspkr virtio_balloon ppdev virtio_rng parport_pc i2c_piix4 parport acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc xfs libcrc32c ata_generic pata_acpi virtio_blk virtio_net cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops crc32c_intel ata_piix ttm libata drm serio_raw [ 3000.645245] i2c_core virtio_pci virtio_ring virtio floppy dm_mirror dm_region_hash dm_log dm_mod [last unloaded: xt_u32] [ 3000.646360] CPU: 1 PID: 26402 Comm: date Not tainted 4.11.0-rc7.1.el7.test.x86_64 #1 [ 3000.647092] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [ 3000.647638] task: ffff8800415ada00 task.stack: ffffc90000ff0000 [ 3000.648207] RIP: 0010:pnfs_put_lseg+0x29/0x100 [nfsv4] [ 3000.648696] RSP: 0018:ffffc90000ff39b8 EFLAGS: 00010246 [ 3000.649193] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 00000000000d43be [ 3000.649859] RDX: 00000000000d43bd RSI: 0000000000000000 RDI: fffffffffffffff4 [ 3000.650530] RBP: ffffc90000ff39d8 R08: 000000000001e320 R09: ffffffffa05c35ce [ 3000.651203] R10: ffff88007fd1e320 R11: ffffea0001283d80 R12: 0000000001400040 [ 3000.651875] R13: ffff88004f77d9f0 R14: ffffc90000ff3cd8 R15: ffff8800417ade00 [ 3000.652546] FS: 00007fac4d5cd740(0000) GS:ffff88007fd00000(0000) knlGS:0000000000000000 [ 3000.653304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3000.653849] CR2: 000000000000003c CR3: 000000004f080000 CR4: 00000000000406e0 [ 3000.654527] Call Trace: [ 3000.654771] fl_pnfs_update_layout.constprop.20+0x10c/0x150 [nfs_layout_nfsv41_files] [ 3000.655505] filelayout_pg_init_write+0x21d/0x270 [nfs_layout_nfsv41_files] [ 3000.656195] __nfs_pageio_add_request+0x11c/0x490 [nfs] [ 3000.656698] nfs_pageio_add_request+0xac/0x260 [nfs] [ 3000.657180] nfs_do_writepage+0x109/0x2e0 [nfs] [ 3000.657616] nfs_writepages_callback+0x16/0x30 [nfs] [ 3000.658096] write_cache_pages+0x26f/0x510 [ 3000.658495] ? nfs_do_writepage+0x2e0/0x2e0 [nfs] [ 3000.658946] ? _raw_spin_unlock_bh+0x1e/0x20 [ 3000.659357] ? wb_wakeup_delayed+0x5f/0x70 [ 3000.659748] ? __mark_inode_dirty+0x2eb/0x360 [ 3000.660170] nfs_writepages+0x84/0xd0 [nfs] [ 3000.660575] ? nfs_updatepage+0x571/0xb70 [nfs] [ 3000.661012] do_writepages+0x1e/0x30 [ 3000.661358] __filemap_fdatawrite_range+0xc6/0x100 [ 3000.661819] filemap_write_and_wait_range+0x41/0x90 [ 3000.662292] nfs_file_fsync+0x34/0x1f0 [nfs] [ 3000.662704] vfs_fsync_range+0x3d/0xb0 [ 3000.663065] vfs_fsync+0x1c/0x20 [ 3000.663385] nfs4_file_flush+0x57/0x80 [nfsv4] [ 3000.663813] filp_close+0x2f/0x70 [ 3000.664132] __close_fd+0x9a/0xc0 [ 3000.664453] SyS_close+0x23/0x50 [ 3000.664785] do_syscall_64+0x67/0x180 [ 3000.665162] entry_SYSCALL64_slow_path+0x25/0x25 [ 3000.665600] RIP: 0033:0x7fac4d0e1e90 [ 3000.665946] RSP: 002b:00007ffd54e90c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 3000.666679] RAX: ffffffffffffffda RBX: 00007fac4d3b5400 RCX: 00007fac4d0e1e90 [ 3000.667349] RDX: 0000000000000000 RSI: 00007fac4d5d9000 RDI: 0000000000000001 [ 3000.668031] RBP: 0000000000000000 R08: 00007fac4d3b6a00 R09: 00007fac4d5cd740 [ 3000.668709] R10: 00007ffd54e909e0 R11: 0000000000000246 R12: 0000000000000000 [ 3000.669385] R13: 00007fac4d3b5e80 R14: 0000000000000000 R15: 0000000000000000 [ 3000.670061] Code: 00 00 66 66 66 66 90 55 48 85 ff 48 89 e5 41 56 41 55 41 54 53 48 89 fb 0f 84 97 00 00 00 f6 05 16 8f bc ff 10 0f 85 a6 00 00 00 <4c> 8b 63 48 48 8d 7b 38 49 8b 84 24 90 00 00 00 4c 8d a8 88 00 [ 3000.671831] RIP: pnfs_put_lseg+0x29/0x100 [nfsv4] RSP: ffffc90000ff39b8 [ 3000.672462] CR2: 000000000000003c Signed-off-by: Artem Savkov <asavkov@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-27NFSv4: Fix callback server shutdownTrond Myklebust1-8/+16
We want to use kthread_stop() in order to ensure the threads are shut down before we tear down the nfs_callback_info in nfs_callback_down. Tested-and-reviewed-by: Kinglong Mee <kinglongmee@gmail.com> Reported-by: Kinglong Mee <kinglongmee@gmail.com> Fixes: bb6aeba736ba9 ("NFSv4.x: Switch to using svc_set_num_threads()...") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2017-04-27NFSv4.x/callback: Create the callback service through svc_create_pooledKinglong Mee1-1/+1
As the comments for svc_set_num_threads() said, " Destroying threads relies on the service threads filling in rqstp->rq_task, which only the nfs ones do. Assumes the serv has been created using svc_create_pooled()." If creating service through svc_create(), the svc_pool_map_put() will be called in svc_destroy(), but the pool map isn't used. So that, the reference of pool map will be drop, the next using of pool map will get a zero npools. [ 137.992130] divide error: 0000 [#1] SMP [ 137.992148] Modules linked in: nfsd(E) nfsv4 nfs fscache fuse tun bridge stp llc ip_set nfnetlink vmw_vsock_vmci_transport vsock snd_seq_midi snd_seq_midi_event vmw_balloon coretemp crct10dif_pclmul crc32_pclmul ppdev ghash_clmulni_intel intel_rapl_perf joydev snd_ens1371 gameport snd_ac97_codec ac97_bus snd_seq snd_pcm snd_rawmidi snd_timer snd_seq_device snd soundcore parport_pc parport nfit acpi_cpufreq tpm_tis tpm_tis_core tpm vmw_vmci i2c_piix4 shpchp auth_rpcgss nfs_acl lockd(E) grace sunrpc(E) xfs libcrc32c vmwgfx drm_kms_helper ttm crc32c_intel drm e1000 mptspi scsi_transport_spi serio_raw mptscsih mptbase ata_generic pata_acpi [last unloaded: nfsd] [ 137.992336] CPU: 0 PID: 4514 Comm: rpc.nfsd Tainted: G E 4.11.0-rc8+ #536 [ 137.992777] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015 [ 137.993757] task: ffff955984101d00 task.stack: ffff9873c2604000 [ 137.994231] RIP: 0010:svc_pool_for_cpu+0x2b/0x80 [sunrpc] [ 137.994768] RSP: 0018:ffff9873c2607c18 EFLAGS: 00010246 [ 137.995227] RAX: 0000000000000000 RBX: ffff95598376f000 RCX: 0000000000000002 [ 137.995673] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9559944aec00 [ 137.996156] RBP: ffff9873c2607c18 R08: ffff9559944aec28 R09: 0000000000000000 [ 137.996609] R10: 0000000001080002 R11: 0000000000000000 R12: ffff95598376f010 [ 137.997063] R13: ffff95598376f018 R14: ffff9559944aec28 R15: ffff9559944aec00 [ 137.997584] FS: 00007f755529eb40(0000) GS:ffff9559bb600000(0000) knlGS:0000000000000000 [ 137.998048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.998548] CR2: 000055f3aecd9660 CR3: 0000000084290000 CR4: 00000000001406f0 [ 137.999052] Call Trace: [ 137.999517] svc_xprt_do_enqueue+0xef/0x260 [sunrpc] [ 138.000028] svc_xprt_received+0x47/0x90 [sunrpc] [ 138.000487] svc_add_new_perm_xprt+0x76/0x90 [sunrpc] [ 138.000981] svc_addsock+0x14b/0x200 [sunrpc] [ 138.001424] ? recalc_sigpending+0x1b/0x50 [ 138.001860] ? __getnstimeofday64+0x41/0xd0 [ 138.002346] ? do_gettimeofday+0x29/0x90 [ 138.002779] write_ports+0x255/0x2c0 [nfsd] [ 138.003202] ? _copy_from_user+0x4e/0x80 [ 138.003676] ? write_recoverydir+0x100/0x100 [nfsd] [ 138.004098] nfsctl_transaction_write+0x48/0x80 [nfsd] [ 138.004544] __vfs_write+0x37/0x160 [ 138.004982] ? selinux_file_permission+0xd7/0x110 [ 138.005401] ? security_file_permission+0x3b/0xc0 [ 138.005865] vfs_write+0xb5/0x1a0 [ 138.006267] SyS_write+0x55/0xc0 [ 138.006654] entry_SYSCALL_64_fastpath+0x1a/0xa9 [ 138.007071] RIP: 0033:0x7f7554b9dc30 [ 138.007437] RSP: 002b:00007ffc9f92c788 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 138.007807] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f7554b9dc30 [ 138.008168] RDX: 0000000000000002 RSI: 00005640cd536640 RDI: 0000000000000003 [ 138.008573] RBP: 00007ffc9f92c780 R08: 0000000000000001 R09: 0000000000000002 [ 138.008918] R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000000004 [ 138.009254] R13: 00005640cdbf77a0 R14: 00005640cdbf7720 R15: 00007ffc9f92c238 [ 138.009610] Code: 0f 1f 44 00 00 48 8b 87 98 00 00 00 55 48 89 e5 48 83 78 08 00 74 10 8b 05 07 42 02 00 83 f8 01 74 40 83 f8 02 74 19 31 c0 31 d2 <f7> b7 88 00 00 00 5d 89 d0 48 c1 e0 07 48 03 87 90 00 00 00 c3 [ 138.010664] RIP: svc_pool_for_cpu+0x2b/0x80 [sunrpc] RSP: ffff9873c2607c18 [ 138.011061] ---[ end trace b3468224cafa7d11 ]--- Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2017-04-26NFSv4: Don't special case "launder"Trond Myklebust2-17/+12
If the client receives a fatal server error from nfs_pageio_add_request(), then we should always truncate the page on which the error occurred. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-26NFS: Add a few more fatal I/O errors to nfs_error_is_fatal()Trond Myklebust1-0/+4
EACCES, EDQUOT, EFBIG and ESTALE are all fatal errors as far as NFS I/O is concerned. They need to be reported back to the application. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-25NFSv3: nfs3_nlm_alloc_call should be declared staticTrond Myklebust1-3/+3
Fix compiler warnings. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-25NFS: Don't write back further requests if there is a pending write errorTrond Myklebust1-4/+21
If the server has already returned a fatal write error that the user has not yet received on this file, then don't write back the other pages. Instead, act as if they have been sent, and have returned with the same error. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-25pNFS: Fix use after free issues in pnfs_do_read()Trond Myklebust1-3/+13
The assumption should be that if the caller returns PNFS_ATTEMPTED, then hdr has been consumed, and so we should not be testing hdr->task.tk_status. If the caller returns PNFS_TRY_AGAIN, then we need to recoalesce and free hdr. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-25pNFS: Ensure we check layout segment validity in the pg_init() callbackTrond Myklebust4-0/+18
If we have a layout segment cached in pgio->pg_lseg, we should check it for validity before reusing it in a new RPC request. Otherwise, if we recoalesce, we can end up looping forever. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-21NFS: Always wait for I/O completion before unlockBenjamin Coddington3-6/+67
NFS attempts to wait for read and write completion before unlocking in order to ensure that the data returned was protected by the lock. When this waiting is interrupted by a signal, the unlock may be skipped, and messages similar to the following are seen in the kernel ring buffer: [20.167876] Leaked locks on dev=0x0:0x2b ino=0x8dd4c3: [20.168286] POSIX: fl_owner=ffff880078b06940 fl_flags=0x1 fl_type=0x0 fl_pid=20183 [20.168727] POSIX: fl_owner=ffff880078b06680 fl_flags=0x1 fl_type=0x0 fl_pid=20185 For NFSv3, the missing unlock will cause the server to refuse conflicting locks indefinitely. For NFSv4, the leftover lock will be removed by the server after the lease timeout. This patch fixes this issue by skipping the usual wait in nfs_iocounter_wait if the FL_CLOSE flag is set when signaled. Instead, the wait happens in the unlock RPC task on the NFS UOC rpc_waitqueue. For NFSv3, use lockd's new nlmclnt_operations along with nfs_async_iocounter_wait to defer NLM's unlock task until the lock context's iocounter reaches zero. For NFSv4, call nfs_async_iocounter_wait() directly from unlock's current rpc_call_prepare. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-21lockd: Introduce nlmclnt_operationsBenjamin Coddington3-2/+3
NFS would enjoy the ability to modify the behavior of the NLM client's unlock RPC task in order to delay the transmission of the unlock until IO that was submitted under that lock has completed. This ability can ensure that the NLM client will always complete the transmission of an unlock even if the waiting caller has been interrupted with fatal signal. For this purpose, a pointer to a struct nlmclnt_operations can be assigned in a nfs_module's nfs_rpc_ops that will install those nlmclnt_operations on the nlm_host. The struct nlmclnt_operations defines three callback operations that will be used in a following patch: nlmclnt_alloc_call - used to call back after a successful allocation of a struct nlm_rqst in nlmclnt_proc(). nlmclnt_unlock_prepare - used to call back during NLM unlock's rpc_call_prepare. The NLM client defers calling rpc_call_start() until this callback returns false. nlmclnt_release_call - used to call back when the NLM client's struct nlm_rqst is freed. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-21NFS: Add an iocounter wait function for async RPC tasksBenjamin Coddington2-1/+34
By sleeping on a new NFS Unlock-On-Close waitqueue, rpc tasks may wait for a lock context's iocounter to reach zero. The rpc waitqueue is only woken when the open_context has the NFS_CONTEXT_UNLOCK flag set in order to mitigate spurious wake-ups for any iocounter reaching zero. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-21NFS: Move the flock open mode check into nfs_flock()Benjamin Coddington2-16/+16
We only need to check lock exclusive/shared types against open mode when flock() is used on NFS, so move it into the flock-specific path instead of checking it for all locks. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-21NFS4: remove a redundant lock range checkBenjamin Coddington1-3/+0
flock64_to_posix_lock() is already doing this check Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Jeff Layton <jeff.layton@primarydata.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20pNFS: unexport nfs4_pnfs_v3_ds_connect_unloadTrond Myklebust1-1/+0
It is not used outside the NFSv4 module. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20pNFS: Unexport pnfs_put_lseg_locked and _pnfs_return_layoutTrond Myklebust1-2/+0
They are not used outside the NFSv4 module. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20pNFS: Remove unused layout driver callbacksTrond Myklebust2-18/+4
encode_layoutreturn and encode_layoutcommit are now unused. Let's remove them. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20nfs: remove the objlayout driverChristoph Hellwig7-1990/+0
The objlayout code has been in the tree, but it's been unmaintained and no server product for it actually ever shipped. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20pNFS/flexfiles: Check the result of nfs4_pnfs_ds_connectTrond Myklebust1-1/+1
The check in nfs4_ff_layout_prepare_ds() seems to be missing. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Fixes: a33e4b036d461 ("pNFS: return status from nfs4_pnfs_ds_connect") Cc: Weston Andros Adamson <dros@primarydata.com> Cc: stable@vger.kernel.org # v4.11
2017-04-20NFSv4: Fix a hang in OPEN related to server rebootTrond Myklebust1-1/+3
If the server fails to return the attributes as part of an OPEN reply, and then reboots, we can end up hanging. The reason is that the client attempts to send a GETATTR in order to pick up the missing OPEN call, but fails to release the slot first, causing reboot recovery to deadlock. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Fixes: 2e80dbe7ac51a ("NFSv4.1: Close callback races for OPEN, LAYOUTGET...") Cc: stable@vger.kernel.org # v4.8+
2017-04-20fs: Remove SB_I_DYNBDI flagJan Kara1-1/+0
Now that all bdi structures filesystems use are properly refcounted, we can remove the SB_I_DYNBDI flag. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-20nfs: Convert to separately allocated bdiJan Kara4-35/+28
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Anna Schumaker <anna.schumaker@netapp.com> CC: linux-nfs@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-20NFS: move rw_mode to nfs_pageio_headerBenjamin Coddington4-12/+15
Let's try to have it in a cacheline in nfs4_proc_pgio_rpc_prepare(). Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: move nfs_pgarray_set() to open codeBenjamin Coddington1-20/+14
Since commit 00bfa30abe86 ("NFS: Create a common pgio_alloc and pgio_release function"), nfs_pgarray_set() has only a single caller. Let's open code it. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Use GFP_NOIO for two allocations in writebackBenjamin Coddington1-4/+11
Prevent a deadlock that can occur if we wait on allocations that try to write back our pages. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Fixes: 00bfa30abe869 ("NFS: Create a common pgio_alloc and pgio_release...") Cc: stable@vger.kernel.org # 3.16+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Fix use after free in write error pathFred Isaman1-1/+1
Signed-off-by: Fred Isaman <fred.isaman@gmail.com> Fixes: 0bcbf039f6b2b ("nfs: handle request add failure properly") Cc: stable@vger.kernel.org # v4.5+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Fix missing pg_cleanup after nfs_pageio_cond_complete()Benjamin Coddington1-2/+4
Commit a7d42ddb3099727f58366fa006f850a219cce6c8 ("nfs: add mirroring support to pgio layer") moved pg_cleanup out of the path when there was non-sequental I/O that needed to be flushed. The result is that for layouts that have more than one layout segment per file, the pg_lseg is not cleared, so we can end up hitting the WARN_ON_ONCE(req_start >= seg_end) in pnfs_generic_pg_test since the pg_lseg will be pointing to that previously-flushed layout segment. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Fixes: a7d42ddb3099 ("nfs: add mirroring support to pgio layer") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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