- 15 Sep, 2020 2 commits
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David Milburn authored
The write zeros command does not work with 4k range. bash-4.4# ./blkdiscard /dev/nvme0n1p2 bash-4.4# strace -efallocate xfs_io -c "fzero 536895488 2048" /dev/nvme0n1p2 fallocate(3, FALLOC_FL_ZERO_RANGE, 536895488, 2048) = 0 +++ exited with 0 +++ bash-4.4# dd bs=1 if=/dev/nvme0n1p2 skip=536895488 count=512 | hexdump -C 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000200 bash-4.4# ./blkdiscard /dev/nvme0n1p2 bash-4.4# strace -efallocate xfs_io -c "fzero 536895488 4096" /dev/nvme0n1p2 fallocate(3, FALLOC_FL_ZERO_RANGE, 536895488, 4096) = 0 +++ exited with 0 +++ bash-4.4# dd bs=1 if=/dev/nvme0n1p2 skip=536895488 count=512 | hexdump -C 00000000 5c 61 5c b0 96 21 1b 5e 85 0c 07 32 9c 8c eb 3c |\a\..!.^...2...<| 00000010 4a a2 06 ca 67 15 2d 8e 29 8d a8 a0 7e 46 8c 62 |J...g.-.)...~F.b| 00000020 bb 4c 6c c1 6b f5 ae a5 e4 a9 bc 93 4f 60 ff 7a |.Ll.k.......O`.z| Reported-by:
Eric Sandeen <esandeen@redhat.com> Signed-off-by:
David Milburn <dmilburn@redhat.com> Tested-by:
Eric Sandeen <sandeen@redhat.com> Signed-off-by:
Christoph Hellwig <hch@lst.de>
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Jan Höppner authored
A discard request that writes zeros using the global kernel internal ZERO_PAGE will fail for machines with more than 2GB of memory due to the location of the ZERO_PAGE. Fix this by using a driver owned global zero page allocated with GFP_DMA flag set. Fixes: 28b841b3 ("s390/dasd: Add discard support for FBA devices") Signed-off-by:
Jan Höppner <hoeppner@linux.ibm.com> Reviewed-by:
Stefan Haberland <sth@linux.ibm.com> Cc: <stable@vger.kernel.org> # 4.14+ Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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- 10 Sep, 2020 1 commit
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git://git.infradead.org/nvmeJens Axboe authored
Pull NVMe fixes from Christoph. "nvme fixes for 5.9 - cancel async events before freeing them (David Milburn) - revert a broken race fix (James Smart) - fix command processing during resets (Sagi Grimberg)" * tag 'nvme-5.9-2020-09-10' of git://git.infradead.org/nvme: nvme-fabrics: allow to queue requests for live queues nvme-tcp: cancel async events before freeing event struct nvme-rdma: cancel async events before freeing event struct nvme-fc: cancel async events before freeing event struct nvme: Revert: Fix controller creation races with teardown flow
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- 09 Sep, 2020 2 commits
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Ritesh Harjani authored
If we hit the UINT_MAX limit of bio->bi_iter.bi_size and so we are anyway not merging this page in this bio, then it make sense to make same_page also as false before returning. Without this patch, we hit below WARNING in iomap. This mostly happens with very large memory system and / or after tweaking vm dirty threshold params to delay writeback of dirty data. WARNING: CPU: 18 PID: 5130 at fs/iomap/buffered-io.c:74 iomap_page_release+0x120/0x150 CPU: 18 PID: 5130 Comm: fio Kdump: loaded Tainted: G W 5.8.0-rc3 #6 Call Trace: __remove_mapping+0x154/0x320 (unreliable) iomap_releasepage+0x80/0x180 try_to_release_page+0x94/0xe0 invalidate_inode_page+0xc8/0x110 invalidate_mapping_pages+0x1dc/0x540 generic_fadvise+0x3c8/0x450 xfs_file_fadvise+0x2c/0xe0 [xfs] vfs_fadvise+0x3c/0x60 ksys_fadvise64_64+0x68/0xe0 sys_fadvise64+0x28/0x40 system_call_exception+0xf8/0x1c0 system_call_common+0xf0/0x278 Fixes: cc90bc68 ("block: fix "check bi_size overflow before merge"") Reported-by:
Shivaprasad G Bhat <sbhat@linux.ibm.com> Suggested-by:
Christoph Hellwig <hch@infradead.org> Signed-off-by:
Anju T Sudhakar <anju@linux.vnet.ibm.com> Signed-off-by:
Ritesh Harjani <riteshh@linux.ibm.com> Reviewed-by:
Ming Lei <ming.lei@redhat.com> Reviewed-by:
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Sagi Grimberg authored
Right now we are failing requests based on the controller state (which is checked inline in nvmf_check_ready) however we should definitely accept requests if the queue is live. When entering controller reset, we transition the controller into NVME_CTRL_RESETTING, and then return BLK_STS_RESOURCE for non-mpath requests (have blk_noretry_request set). This is also the case for NVME_REQ_USER for the wrong reason. There shouldn't be any reason for us to reject this I/O in a controller reset. We do want to prevent passthru commands on the admin queue because we need the controller to fully initialize first before we let user passthru admin commands to be issued. In a non-mpath setup, this means that the requests will simply be requeued over and over forever not allowing the q_usage_counter to drop its final reference, causing controller reset to hang if running concurrently with heavy I/O. Fixes: 35897b92 ("nvme-fabrics: fix and refine state checks in __nvmf_check_ready") Reviewed-by:
James Smart <james.smart@broadcom.com> Signed-off-by:
Sagi Grimberg <sagi@grimberg.me> Signed-off-by:
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- 08 Sep, 2020 6 commits
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Omar Sandoval authored
Yang Yang reported the following crash caused by requeueing a flush request in Kyber: [ 2.517297] Unable to handle kernel paging request at virtual address ffffffd8071c0b00 ... [ 2.517468] pc : clear_bit+0x18/0x2c [ 2.517502] lr : sbitmap_queue_clear+0x40/0x228 [ 2.517503] sp : ffffff800832bc60 pstate : 00c00145 ... [ 2.517599] Process ksoftirqd/5 (pid: 51, stack limit = 0xffffff8008328000) [ 2.517602] Call trace: [ 2.517606] clear_bit+0x18/0x2c [ 2.517619] kyber_finish_request+0x74/0x80 [ 2.517627] blk_mq_requeue_request+0x3c/0xc0 [ 2.517637] __scsi_queue_insert+0x11c/0x148 [ 2.517640] scsi_softirq_done+0x114/0x130 [ 2.517643] blk_done_softirq+0x7c/0xb0 [ 2.517651] __do_softirq+0x208/0x3bc [ 2.517657] run_ksoftirqd+0x34/0x60 [ 2.517663] smpboot_thread_fn+0x1c4/0x2c0 [ 2.517667] kthread+0x110/0x120 [ 2.517669] ret_from_fork+0x10/0x18 This happens because Kyber doesn't track flush requests, so kyber_finish_request() reads a garbage domain token. Only call the scheduler's requeue_request() hook if RQF_ELVPRIV is set (like we do for the finish_request() hook in blk_mq_free_request()). Now that we're handling it in blk-mq, also remove the check from BFQ. Reported-by:
Yang Yang <yang.yang@vivo.com> Signed-off-by:
Omar Sandoval <osandov@fb.com> Signed-off-by:
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David Milburn authored
Cancel async event work in case async event has been queued up, and nvme_tcp_submit_async_event() runs after event has been freed. Signed-off-by:
Keith Busch <kbusch@kernel.org> Reviewed-by:
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David Milburn authored
Cancel async event work in case async event has been queued up, and nvme_rdma_submit_async_event() runs after event has been freed. Signed-off-by:
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David Milburn authored
Cancel async event work in case async event has been queued up, and nvme_fc_submit_async_event() runs after event has been freed. Signed-off-by:
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James Smart authored
The indicated patch introduced a barrier in the sysfs_delete attribute for the controller that rejects the request if the controller isn't created. "Created" is defined as at least 1 call to nvme_start_ctrl(). This is problematic in error-injection testing. If an error occurs on the initial attempt to create an association and the controller enters reconnect(s) attempts, the admin cannot delete the controller until either there is a successful association created or ctrl_loss_tmo times out. Where this issue is particularly hurtful is when the "admin" is the nvme-cli, it is performing a connection to a discovery controller, and it is initiated via auto-connect scripts. With the FC transport, if the first connection attempt fails, the controller enters a normal reconnect state but returns control to the cli thread that created the controller. In this scenario, the cli attempts to read the discovery log via ioctl, which fails, causing the cli to see it as an empty log and then proceeds to delete the discovery controller. The delete is rejected and the controller is left live. If the discovery controller reconnect then succeeds, there is no action to delete it, and it sits live doing nothing. Cc: <stable@vger.kernel.org> # v5.7+ Fixes: ce151813 ("nvme: Fix controller creation races with teardown flow") Signed-off-by:
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Christoph Hellwig authored
mdadm relies on the fact that deleting an invalid partition returns -ENXIO or -ENOTTY to detect if a block device is a partition or a whole device. Fixes: 08fc1ab6 ("block: fix locking in bdev_del_partition") Reported-by:
kernel test robot <rong.a.chen@intel.com> Signed-off-by:
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- 03 Sep, 2020 1 commit
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Ming Lei authored
Block layer usually doesn't support or allow zero-length bvec. Since commit 1bdc76ae ("iov_iter: use bvec iterator to implement iterate_bvec()"), iterate_bvec() switches to bvec iterator. However, Al mentioned that 'Zero-length segments are not disallowed' in iov_iter. Fixes for_each_bvec() so that it can move on after seeing one zero length bvec. Fixes: 1bdc76ae ("iov_iter: use bvec iterator to implement iterate_bvec()") Reported-by:
syzbot <syzbot+61acc40a49a3e46e25ea@syzkaller.appspotmail.com> Signed-off-by:
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Matthew Wilcox <willy@infradead.org> Cc: <stable@vger.kernel.org> Link: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2262077.htmlSigned-off-by:
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- 01 Sep, 2020 5 commits
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Tejun Heo authored
blk-iocost calls blk_stat_enable_accounting() while holding an irqsafe lock which triggers a lockdep splat because q->stats->lock isn't irqsafe. Let's make it irqsafe. Signed-off-by:
Tejun Heo <tj@kernel.org> Fixes: cd006509 ("blk-iocost: account for IO size when testing latencies") Cc: stable@vger.kernel.org # v5.8+ Signed-off-by:
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Tejun Heo authored
ioc_pd_free() grabs irq-safe ioc->lock without ensuring that irq is disabled when it can be called with irq disabled or enabled. This has a small chance of causing A-A deadlocks and triggers lockdep splats. Use irqsave operations instead. Signed-off-by:
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Christoph Hellwig authored
We need to hold the whole device bd_mutex to protect against other thread concurrently deleting out partition before we get to it, and thus causing a use after free. Fixes: cddae808 ("block: pass a hd_struct to delete_partition") Reported-by: syzbot+6448f3c229bc52b82f69@syzkaller.appspotmail.com Signed-off-by:
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Ming Lei authored
Commit e8c7d14a ("block: revert back to synchronous request_queue removal") stops to release request queue from wq context because that commit supposed all blk_put_queue() is called in context which is allowed to sleep. However, this assumption isn't true because we release disk's reference in partition's percpu_ref's ->release() which doesn't allow to sleep, because the ->release() is run via call_rcu(). Fixes this issue by moving put disk reference into hd_struct_free_work() Fixes: e8c7d14a ("block: revert back to synchronous request_queue removal") Reported-by:
Ilya Dryomov <idryomov@gmail.com> Signed-off-by:
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Jens Axboe authored
If a driver leaves the limit settings as the defaults, then we don't initialize bdi->io_pages. This means that file systems may need to work around bdi->io_pages == 0, which is somewhat messy. Initialize the default value just like we do for ->ra_pages. Cc: stable@vger.kernel.org Fixes: 9491ae4a ("mm: don't cap request size based on read-ahead setting") Reported-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reviewed-by:
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- 29 Aug, 2020 1 commit
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git://git.infradead.org/nvmeJens Axboe authored
Pull NVMe fixes from Sagi: "- instance leak and io boundary fixes from Keith - fc locking fix from Christophe - various tcp/rdma reset during traffic fixes from Me - pci use-after-free fix from Tong - tcp target null deref fix from Ziye" * 'nvme-5.9-rc' of git://git.infradead.org/nvme: nvme-pci: cancel nvme device request before disabling nvme: only use power of two io boundaries nvme: fix controller instance leak nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()' nvme: Fix NULL dereference for pci nvme controllers nvme-rdma: fix reset hang if controller died in the middle of a reset nvme-rdma: fix timeout handler nvme-rdma: serialize controller teardown sequences nvme-tcp: fix reset hang if controller died in the middle of a reset nvme-tcp: fix timeout handler nvme-tcp: serialize controller teardown sequences nvme: have nvme_wait_freeze_timeout return if it timed out nvme-fabrics: don't check state NVME_CTRL_NEW for request acceptance nvmet-tcp: Fix NULL dereference when a connect data comes in h2cdata pdu
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- 28 Aug, 2020 16 commits
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Tong Zhang authored
This patch addresses an irq free warning and null pointer dereference error problem when nvme devices got timeout error during initialization. This problem happens when nvme_timeout() function is called while nvme_reset_work() is still in execution. This patch fixed the problem by setting flag of the problematic request to NVME_REQ_CANCELLED before calling nvme_dev_disable() to make sure __nvme_submit_sync_cmd() returns an error code and let nvme_submit_sync_cmd() fail gracefully. The following is console output. [ 62.472097] nvme nvme0: I/O 13 QID 0 timeout, disable controller [ 62.488796] nvme nvme0: could not set timestamp (881) [ 62.494888] ------------[ cut here ]------------ [ 62.495142] Trying to free already-free IRQ 11 [ 62.495366] WARNING: CPU: 0 PID: 7 at kernel/irq/manage.c:1751 free_irq+0x1f7/0x370 [ 62.495742] Modules linked in: [ 62.495902] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0+ #8 [ 62.496206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-p4 [ 62.496772] Workqueue: nvme-reset-wq nvme_reset_work [ 62.497019] RIP: 0010:free_irq+0x1f7/0x370 [ 62.497223] Code: e8 ce 49 11 00 48 83 c4 08 4c 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 89 f6 48 c70 [ 62.498133] RSP: 0000:ffffa96800043d40 EFLAGS: 00010086 [ 62.498391] RAX: 0000000000000000 RBX: ffff9b87fc458400 RCX: 0000000000000000 [ 62.498741] RDX: 0000000000000001 RSI: 0000000000000096 RDI: ffffffff9693d72c [ 62.499091] RBP: ffff9b87fd4c8f60 R08: ffffa96800043bfd R09: 0000000000000163 [ 62.499440] R10: ffffa96800043bf8 R11: ffffa96800043bfd R12: ffff9b87fd4c8e00 [ 62.499790] R13: ffff9b87fd4c8ea4 R14: 000000000000000b R15: ffff9b87fd76b000 [ 62.500140] FS: 0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000 [ 62.500534] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.500816] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0 [ 62.501165] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.501515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.501864] Call Trace: [ 62.501993] pci_free_irq+0x13/0x20 [ 62.502167] nvme_reset_work+0x5d0/0x12a0 [ 62.502369] ? update_load_avg+0x59/0x580 [ 62.502569] ? ttwu_queue_wakelist+0xa8/0xc0 [ 62.502780] ? try_to_wake_up+0x1a2/0x450 [ 62.502979] process_one_work+0x1d2/0x390 [ 62.503179] worker_thread+0x45/0x3b0 [ 62.503361] ? process_one_work+0x390/0x390 [ 62.503568] kthread+0xf9/0x130 [ 62.503726] ? kthread_park+0x80/0x80 [ 62.503911] ret_from_fork+0x22/0x30 [ 62.504090] ---[ end trace de9ed4a70f8d71e2 ]--- [ 123.912275] nvme nvme0: I/O 12 QID 0 timeout, disable controller [ 123.914670] nvme nvme0: 1/0/0 default/read/poll queues [ 123.916310] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 123.917469] #PF: supervisor write access in kernel mode [ 123.917725] #PF: error_code(0x0002) - not-present page [ 123.917976] PGD 0 P4D 0 [ 123.918109] Oops: 0002 [#1] SMP PTI [ 123.918283] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G W 5.8.0+ #8 [ 123.918650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-p4 [ 123.919219] Workqueue: nvme-reset-wq nvme_reset_work [ 123.919469] RIP: 0010:__blk_mq_alloc_map_and_request+0x21/0x80 [ 123.919757] Code: 66 0f 1f 84 00 00 00 00 00 41 55 41 54 55 48 63 ee 53 48 8b 47 68 89 ee 48 89 fb 8b4 [ 123.920657] RSP: 0000:ffffa96800043d40 EFLAGS: 00010286 [ 123.920912] RAX: ffff9b87fc4fee40 RBX: ffff9b87fc8cb008 RCX: 0000000000000000 [ 123.921258] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9b87fc618000 [ 123.921602] RBP: 0000000000000000 R08: ffff9b87fdc2c4a0 R09: ffff9b87fc616000 [ 123.921949] R10: 0000000000000000 R11: ffff9b87fffd1500 R12: 0000000000000000 [ 123.922295] R13: 0000000000000000 R14: ffff9b87fc8cb200 R15: ffff9b87fc8cb000 [ 123.922641] FS: 0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000 [ 123.923032] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.923312] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0 [ 123.923660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 123.924007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 123.924353] Call Trace: [ 123.924479] blk_mq_alloc_tag_set+0x137/0x2a0 [ 123.924694] nvme_reset_work+0xed6/0x12a0 [ 123.924898] process_one_work+0x1d2/0x390 [ 123.925099] worker_thread+0x45/0x3b0 [ 123.925280] ? process_one_work+0x390/0x390 [ 123.925486] kthread+0xf9/0x130 [ 123.925642] ? kthread_park+0x80/0x80 [ 123.925825] ret_from_fork+0x22/0x30 [ 123.926004] Modules linked in: [ 123.926158] CR2: 0000000000000000 [ 123.926322] ---[ end trace de9ed4a70f8d71e3 ]--- [ 123.926549] RIP: 0010:__blk_mq_alloc_map_and_request+0x21/0x80 [ 123.926832] Code: 66 0f 1f 84 00 00 00 00 00 41 55 41 54 55 48 63 ee 53 48 8b 47 68 89 ee 48 89 fb 8b4 [ 123.927734] RSP: 0000:ffffa96800043d40 EFLAGS: 00010286 [ 123.927989] RAX: ffff9b87fc4fee40 RBX: ffff9b87fc8cb008 RCX: 0000000000000000 [ 123.928336] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9b87fc618000 [ 123.928679] RBP: 0000000000000000 R08: ffff9b87fdc2c4a0 R09: ffff9b87fc616000 [ 123.929025] R10: 0000000000000000 R11: ffff9b87fffd1500 R12: 0000000000000000 [ 123.929370] R13: 0000000000000000 R14: ffff9b87fc8cb200 R15: ffff9b87fc8cb000 [ 123.929715] FS: 0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000 [ 123.930106] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.930384] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0 [ 123.930731] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 123.931077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Co-developed-by:
Tong Zhang <ztong0001@gmail.com> Reviewed-by:
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Keith Busch authored
The kernel requires a power of two for boundaries because that's the only way it can efficiently split commands that cross them. A controller, however, may report a non-power of two boundary. The driver had been rounding the controller's value to one the kernel can use, but splitting on the wrong boundary provides no benefit on the device side, and incurs additional submission overhead from non-optimal splits. Don't provide any boundary hint if the controller's value can't be used and log a warning when first scanning a disk's unreported IO boundary. Since the chunk sector logic has grown, move it to a separate function. Cc: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Keith Busch authored
If the driver has to unbind from the controller for an early failure before the subsystem has been set up, there won't be a subsystem holding the controller's instance, so the controller needs to free its own instance in this case. Fixes: 733e4b69 ("nvme: Assign subsys instance from first ctrl") Signed-off-by:
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by:
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Christophe JAILLET authored
The way 'spin_lock()' and 'spin_lock_irqsave()' are used is not consistent in this function. Use 'spin_lock_irqsave()' also here, as there is no guarantee that interruptions are disabled at that point, according to surrounding code. Fixes: a97ec51b ("nvmet_fc: Rework target side abort handling") Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by:
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Sagi Grimberg authored
PCIe controllers do not have fabric opts, verify they exist before showing ctrl_loss_tmo or reconnect_delay attributes. Fixes: 764075fd ("nvme: expose reconnect_delay and ctrl_loss_tmo via sysfs") Reported-by:
Tobias Markus <tobias@markus-regensburg.de> Reviewed-by:
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Sagi Grimberg authored
If the controller becomes unresponsive in the middle of a reset, we will hang because we are waiting for the freeze to complete, but that cannot happen since we have commands that are inflight holding the q_usage_counter, and we can't blindly fail requests that times out. So give a timeout and if we cannot wait for queue freeze before unfreezing, fail and have the error handling take care how to proceed (either schedule a reconnect of remove the controller). Reviewed-by:
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Sagi Grimberg authored
When a request times out in a LIVE state, we simply trigger error recovery and let the error recovery handle the request cancellation, however when a request times out in a non LIVE state, we make sure to complete it immediately as it might block controller setup or teardown and prevent forward progress. However tearing down the entire set of I/O and admin queues causes freeze/unfreeze imbalance (q->mq_freeze_depth) because and is really an overkill to what we actually need, which is to just fence controller teardown that may be running, stop the queue, and cancel the request if it is not already completed. Now that we have the controller teardown_lock, we can safely serialize request cancellation. This addresses a hang caused by calling extra queue freeze on controller namespaces, causing unfreeze to not complete correctly. Reviewed-by:
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Sagi Grimberg authored
In the timeout handler we may need to complete a request because the request that timed out may be an I/O that is a part of a serial sequence of controller teardown or initialization. In order to complete the request, we need to fence any other context that may compete with us and complete the request that is timing out. In this case, we could have a potential double completion in case a hard-irq or a different competing context triggered error recovery and is running inflight request cancellation concurrently with the timeout handler. Protect using a ctrl teardown_lock to serialize contexts that may complete a cancelled request due to error recovery or a reset. Reviewed-by:
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Sagi Grimberg authored
If the controller becomes unresponsive in the middle of a reset, we will hang because we are waiting for the freeze to complete, but that cannot happen since we have commands that are inflight holding the q_usage_counter, and we can't blindly fail requests that times out. So give a timeout and if we cannot wait for queue freeze before unfreezing, fail and have the error handling take care how to proceed (either schedule a reconnect of remove the controller). Signed-off-by: -
Sagi Grimberg authored
When a request times out in a LIVE state, we simply trigger error recovery and let the error recovery handle the request cancellation, however when a request times out in a non LIVE state, we make sure to complete it immediately as it might block controller setup or teardown and prevent forward progress. However tearing down the entire set of I/O and admin queues causes freeze/unfreeze imbalance (q->mq_freeze_depth) because and is really an overkill to what we actually need, which is to just fence controller teardown that may be running, stop the queue, and cancel the request if it is not already completed. Now that we have the controller teardown_lock, we can safely serialize request cancellation. This addresses a hang caused by calling extra queue freeze on controller namespaces, causing unfreeze to not complete correctly. Signed-off-by: -
Sagi Grimberg authored
In the timeout handler we may need to complete a request because the request that timed out may be an I/O that is a part of a serial sequence of controller teardown or initialization. In order to complete the request, we need to fence any other context that may compete with us and complete the request that is timing out. In this case, we could have a potential double completion in case a hard-irq or a different competing context triggered error recovery and is running inflight request cancellation concurrently with the timeout handler. Protect using a ctrl teardown_lock to serialize contexts that may complete a cancelled request due to error recovery or a reset. Signed-off-by: -
Sagi Grimberg authored
Users can detect if the wait has completed or not and take appropriate actions based on this information (e.g. weather to continue initialization or rather fail and schedule another initialization attempt). Reviewed-by:
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Sagi Grimberg authored
NVME_CTRL_NEW should never see any I/O, because in order to start initialization it has to transition to NVME_CTRL_CONNECTING and from there it will never return to this state. Reviewed-by:
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Ziye Yang authored
When handling commands without in-capsule data, we assign the ttag assuming we already have the queue commands array allocated (based on the queue size information in the connect data payload). However if the connect itself did not send the connect data in-capsule we have yet to allocate the queue commands,and we will assign a bogus ttag and suffer a NULL dereference when we receive the corresponding h2cdata pdu. Fix this by checking if we already allocated commands before dereferencing it when handling h2cdata, if we didn't, its for sure a connect and we should use the preallocated connect command. Signed-off-by:
Ziye Yang <ziye.yang@intel.com> Signed-off-by:
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https://git.kernel.org/pub/scm/linux/kernel/git/song/mdJens Axboe authored
Pull MD fix from Song. * 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md: md/raid5: make sure stripe_size as power of two
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Yufen Yu authored
Commit 3b5408b9 ("md/raid5: support config stripe_size by sysfs entry") make stripe_size as a configurable value. It just requires stripe_size as multiple of 4KB. In fact, we should make sure stripe_size as power of two. Otherwise, stripe_shift which is the result of ilog2 can not represent the real stripe_size. Then, stripe_hash() and stripe_hash_locks_hash() may get unexpected value. Fixes: 3b5408b9 ("md/raid5: support config stripe_size by sysfs entry") Signed-off-by:
Yufen Yu <yuyufen@huawei.com> Signed-off-by:
Song Liu <songliubraving@fb.com>
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- 26 Aug, 2020 2 commits
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Martijn Coenen authored
The device size calculation was done before processing the loop configuration, which meant that the we set the size on the underlying block device incorrectly in case lo_offset/lo_sizelimit were set in the configuration. Delay computing the size until we've setup the device parameters correctly. Fixes: 3448914e("loop: Add LOOP_CONFIGURE ioctl") Reported-by:
Lennart Poettering <mzxreary@0pointer.de> Tested-by:
Yang Xu <xuyang2018.jy@cn.fujitsu.com> Signed-off-by:
Martijn Coenen <maco@android.com> Signed-off-by:
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Hou Pu authored
If we configured io timeout of nbd0 to 100s. Later after we finished using it, we configured nbd0 again and set the io timeout to 0. We expect it would timeout after 30 seconds and keep retry. But in fact we could not change the timeout when we set it to 0. the timeout is still the original 100s. So change the timeout to default 30s when we set it to zero. It also behaves same as commit 2da22da5 ("nbd: fix zero cmd timeout handling v2"). It becomes more important if we were reconfigure a nbd device and the io timeout it set to zero. Because it could take 30s to detect the new socket and thus io could be completed more quickly compared to 100s. Signed-off-by:
Hou Pu <houpu@bytedance.com> Reviewed-by:
Josef Bacik <josef@toxicpanda.com> Signed-off-by:
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- 21 Aug, 2020 4 commits
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Hou Pu authored
REQ_FUA should be checked using rq->cmd_flags instead of req_op(). Fixes: deb78b41 ("nullb: emulate cache") Signed-off-by:
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Amit Engel authored
Based on nvme spec, when keep alive timeout is set to zero the keep-alive timer should be disabled. Signed-off-by:
Amit Engel <amit.engel@dell.com> Signed-off-by:
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Chao Leng authored
If a command send through nvme-multipath failed on a dying queue, resend it on another path. Signed-off-by:
Chao Leng <lengchao@huawei.com> [hch: rebased on top of the completion refactoring] Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Christoph Hellwig authored
Check the SCT sub-field for a path related status instead of enumerating invididual status code. As of NVMe 1.4 this adds "Internal Path Error" and "Controller Pathing Error" to the list, but it also future proofs for additional status codes added to the category. Suggested-by:
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