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2016-10-03rbd: lock_on_read map optionIlya Dryomov1-1/+12
Add a per-device option to acquire exclusive lock on reads (in addition to writes and discards). The use case is iSCSI, where it will be used to prevent execution of stale writes after the implicit failover. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Tested-by: Mike Christie <mchristi@redhat.com>
2016-09-23nbd: use BLK_MQ_F_BLOCKINGJosef Bacik1-1/+1
We take a mutex when sending commands and send stuff over the network, we need to have queue_rq called asynchronously. Signed-off-by: Josef Bacik <jbacik@fb.com> Fixes: fd8383fd88a2 ("nbd: convert to blkmq") Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-21lightnvm: control life of nvm_dev in driverMatias Bjørling1-2/+20
LightNVM compatible device drivers does not have a method to expose LightNVM specific sysfs entries. To enable LightNVM sysfs entries to be exposed, lightnvm device drivers require a struct device to attach it to. To allow both the actual device driver and lightnvm sysfs entries to coexist, the device driver tracks the lifetime of the nvm_dev structure. This patch refactors NVMe and null_blk to handle the lifetime of struct nvm_dev, which eliminates the need for struct gendisk when a lightnvm compatible device is provided. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-21null_blk: refactor to support non-gendisk devicesMatias Bjørling1-49/+61
With LightNVM enabled devices, the gendisk structure is not exposed to the user. This hides the device driver specific sysfs entries, and prevents binding of LightNVM geometry information to the device. Refactor the device registration process, so that gendisk and non-gendisk devices are easily managed. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-15blk-mq: remove ->map_queueChristoph Hellwig6-6/+0
All drivers use the default, so provide an inline version of it. If we ever need other queue mapping we can add an optional method back, although supporting will also require major changes to the queue setup code. This provides better code generation, and better debugability as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-08nbd: allow block mq to deal with timeoutsJosef Bacik1-37/+14
Instead of rolling our own timer, just utilize the blk mq req timeout and do the disconnect if any of our commands timeout. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-08nbd: use flags instead of boolJosef Bacik1-8/+10
In preparation for some future changes, change a few of the state bools over to normal bits to set/clear properly. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-08nbd: don't shutdown sock with irq's disabledJosef Bacik1-4/+15
We hit a warning when shutting down the nbd connection because we have irq's disabled. We don't really need to do the shutdown under the lock, just clear the nbd->sock. So do the shutdown outside of the irq. This gets rid of the warning. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-09-08nbd: convert to blkmqJosef Bacik1-208/+129
This moves NBD over to using blkmq, which allows us to get rid of the NBD wide queue lock and the async submit kthread. We will start with 1 hw queue for now, but I plan to add multiple tcp connection support in the future and we'll fix how we set the hwqueue's. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-29mtip32xx: mark symbols static where possibleBaoyou Xie1-1/+1
We get 1 warning when biuld kernel with W=1: drivers/block/mtip32xx/mtip32xx.c:3689:6: warning: no previous prototype for 'mtip_block_release' [-Wmissing-prototypes] In fact, this function is only used in the file in which it is declared and don't need a declaration, but can be made static. so this patch marks it 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-25Revert "floppy: refactor open() flags handling"Jens Axboe1-19/+15
This reverts commit 09954bad448791ef01202351d437abdd9497a804.
2016-08-25Revert "floppy: fix open(O_ACCMODE) for ioctl-only open"Jens Axboe1-9/+12
This reverts commit ff06db1efb2ad6db06eb5b99b88a0c15a9cc9b0e.
2016-08-24rbd: add force close optionMike Christie1-9/+26
This adds a force close option, so we can force the unmapping of a rbd device that is open. If a path/device is blacklisted, apps like multipathd can map a new device and then unmap the old one. The unmapping cleanup would then be handled by the generic hotunplug code paths in multipahd like is done for iSCSI, FC/FCOE, SAS, etc. Signed-off-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-24rbd: add 'config_info' sysfs rbd device attributeMike Christie1-2/+21
Export the info used to setup the rbd image, so it can be used to remap the image. Signed-off-by: Mike Christie <mchristi@redhat.com> [idryomov@gmail.com: do_rbd_add() EH] Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-24rbd: add 'snap_id' sysfs rbd device attributeMike Christie1-0/+10
Export snap id in sysfs, so tools like multipathd can use it in a uuid. Signed-off-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-24rbd: add 'cluster_fsid' sysfs rbd device attributeMike Christie1-0/+10
Export the cluster fsid, so tools like udev and multipath-tools can use it for part of the uuid. Signed-off-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-24rbd: add 'client_addr' sysfs rbd device attributeIlya Dryomov1-0/+13
Export client addr/nonce, so userspace can check if a image is being blacklisted. Signed-off-by: Mike Christie <mchristi@redhat.com> [idryomov@gmail.com: ceph_client_addr(), endianess fix] Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-24rbd: print capacity in decimal and features in hexIlya Dryomov1-2/+3
With exclusive-lock added and more to come, print features into dmesg. Change capacity to decimal while at it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com>
2016-08-24rbd: support for exclusive-lock featureIlya Dryomov2-16/+807
Add basic support for RBD_FEATURE_EXCLUSIVE_LOCK feature. Maintenance operations (resize, snapshot create, etc) are offloaded to librbd via returning -EOPNOTSUPP - librbd should request the lock and execute the operation. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Tested-by: Mike Christie <mchristi@redhat.com>
2016-08-24rbd: retry watch re-registration periodicallyIlya Dryomov1-29/+109
Revamp watch code to support retrying watch re-registration: - add rbd_dev->watch_state for more robust errcb handling - store watch cookie separately to avoid dereferencing watch_handle which is set to NULL on unwatch - move re-register code into a delayed work and retry re-registration every second, unless the client is blacklisted Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Tested-by: Mike Christie <mchristi@redhat.com>
2016-08-24rbd: introduce a per-device ordered workqueueIlya Dryomov1-80/+71
This is going to be used for re-registering watch requests and exclusive-lock tasks: acquire/request lock, notify-acquired, release lock, notify-released. Some refactoring in the map/unmap paths was necessary to give this workqueue a meaningful name: "rbdX-tasks". Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com>
2016-08-24libceph: rename ceph_client_id() -> ceph_client_gid()Ilya Dryomov1-1/+1
It's gid / global_id in other places. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Alex Elder <elder@linaro.org>
2016-08-19xen-blkfront: free resources if xlvbd_alloc_gendisk failsBob Liu1-1/+6
Current code forgets to free resources in the failure path of xlvbd_alloc_gendisk(), this patch fix it. Signed-off-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2016-08-19xen-blkfront: introduce blkif_set_queue_limits()Bob Liu1-38/+48
blk_mq_update_nr_hw_queues() reset all queue limits to default which it's not as xen-blkfront expected, introducing blkif_set_queue_limits() to reset limits with initial correct values. Signed-off-by: Bob Liu <bob.liu@oracle.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2016-08-19xen-blkfront: fix places not updated after introducing 64KB page granularityBob Liu1-2/+2
Two places didn't get updated when 64KB page granularity was introduced, this patch fix them. Signed-off-by: Bob Liu <bob.liu@oracle.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2016-08-11Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds1-18/+8
Pull virtio/vhost fixes and cleanups from Michael Tsirkin: "Misc fixes and cleanups all over the place" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio/s390: deprecate old transport virtio/s390: keep early_put_chars virtio_blk: Fix a slient kernel panic virtio-vsock: fix include guard typo vhost/vsock: fix vhost virtio_vsock_pkt use-after-free 9p/trans_virtio: use kvfree() for iov_iter_get_pages_alloc() virtio: fix error handling for debug builds virtio: fix memory leak in virtqueue_add()
2016-08-09rbd: nuke the 32-bit pool id checkIlya Dryomov1-9/+0
ceph_file_layout::pool_id is now s64. rbd_add_get_pool_id() and ceph_pg_poolid_by_name() both return an int, so it's bogus anyway. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Alex Elder <elder@linaro.org>
2016-08-09virtio_blk: Fix a slient kernel panicMinfei Huang1-18/+8
We do a lot of memory allocation in function init_vq, and don't handle the allocation failure properly. Then this function will return 0, although initialization fails due to lacking memory. At that moment, kernel will panic in guest machine, if virtio is used to drive disk. To fix this bug, we should take care of allocation failure, and return correct value to let caller know what happen. Tested-by: Chao Fan <fanc.fnst@cn.fujitsu.com> Signed-off-by: Minfei Huang <mnghuan@gmail.com> Signed-off-by: Minfei Huang <minfei.hmf@alibaba-inc.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-08rbd: destroy header_oloc in rbd_dev_release()Ilya Dryomov1-0/+1
Purely cosmetic at this point, as rbd doesn't use RADOS namespaces and hence rbd_dev->header_oloc->pool_ns is always NULL. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-07block: rename bio bi_rw to bi_opfJens Axboe6-11/+11
Since commit 63a4cc24867d, bio->bi_rw contains flags in the lower portion and the op code in the higher portions. This means that old code that relies on manually setting bi_rw is most likely going to be broken. Instead of letting that brokeness linger, rename the member, to force old and out-of-tree code to break at compile time instead of at runtime. No intended functional changes in this commit. Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07block/mm: make bdev_ops->rw_page() take a bool for read/writeJens Axboe2-19/+20
Commit abf545484d31 changed it from an 'rw' flags type to the newer ops based interface, but now we're effectively leaking some bdev internals to the rest of the kernel. Since we only care about whether it's a read or a write at that level, just pass in a bool 'is_write' parameter instead. Then we can also move op_is_write() and friends back under CONFIG_BLOCK protection. Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04mm/block: convert rw_page users to bio op useMike Christie2-23/+22
The rw_page users were not converted to use bio/req ops. As a result bdev_write_page is not passing down REQ_OP_WRITE and the IOs will be sent down as reads. Signed-off-by: Mike Christie <mchristi@redhat.com> Fixes: 4e1b2d52a80d ("block, fs, drivers: remove REQ_OP compat defs and related code") Modified by me to: 1) Drop op_flags passing into ->rw_page(), as we don't use it. 2) Make op_is_write() and friends safe to use for !CONFIG_BLOCK Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04loop: make do_req_filebacked more robustChristoph Hellwig1-33/+22
Use a switch statement to iterate over the possible operations and error out if it's an incorrect one. Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04loop: don't try to use AIO for discardsChristoph Hellwig1-4/+8
Fix a fat-fingered conversion to the req_op accessors, and also use a switch statement to make it more obvious what is being checked. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Dave Chinner <david@fromorbit.com> Fixes: c2df40 ("drivers: use req op accessor"); Reviewed-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04nbd: fix race in ioctlVegard Nossum1-8/+4
Quentin ran into this bug: WARNING: CPU: 64 PID: 10085 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x65/0x80 sysfs: cannot create duplicate filename '/devices/virtual/block/nbd3/pid' Modules linked in: nbd CPU: 64 PID: 10085 Comm: qemu-nbd Tainted: G D 4.6.0+ #7 0000000000000000 ffff8820330bba68 ffffffff814b8791 ffff8820330bbac8 0000000000000000 ffff8820330bbab8 ffffffff810d04ab ffff8820330bbaa8 0000001f00000296 0000000000017681 ffff8810380bf000 ffffffffa0001790 Call Trace: [<ffffffff814b8791>] dump_stack+0x4d/0x6c [<ffffffff810d04ab>] __warn+0xdb/0x100 [<ffffffff810d0574>] warn_slowpath_fmt+0x44/0x50 [<ffffffff81218c65>] sysfs_warn_dup+0x65/0x80 [<ffffffff81218a02>] sysfs_add_file_mode_ns+0x172/0x180 [<ffffffff81218a35>] sysfs_create_file_ns+0x25/0x30 [<ffffffff81594a76>] device_create_file+0x36/0x90 [<ffffffffa0000e8d>] __nbd_ioctl+0x32d/0x9b0 [nbd] [<ffffffff814cc8e8>] ? find_next_bit+0x18/0x20 [<ffffffff810f7c29>] ? select_idle_sibling+0xe9/0x120 [<ffffffff810f6cd7>] ? __enqueue_entity+0x67/0x70 [<ffffffff810f9bf0>] ? enqueue_task_fair+0x630/0xe20 [<ffffffff810efa76>] ? resched_curr+0x36/0x70 [<ffffffff810f0078>] ? check_preempt_curr+0x78/0x90 [<ffffffff810f00a2>] ? ttwu_do_wakeup+0x12/0x80 [<ffffffff810f01b1>] ? ttwu_do_activate.constprop.86+0x61/0x70 [<ffffffff810f0c15>] ? try_to_wake_up+0x185/0x2d0 [<ffffffff810f0d6d>] ? default_wake_function+0xd/0x10 [<ffffffff81105471>] ? autoremove_wake_function+0x11/0x40 [<ffffffffa0001577>] nbd_ioctl+0x67/0x94 [nbd] [<ffffffff814ac0fd>] blkdev_ioctl+0x14d/0x940 [<ffffffff811b0da2>] ? put_pipe_info+0x22/0x60 [<ffffffff811d96cc>] block_ioctl+0x3c/0x40 [<ffffffff811ba08d>] do_vfs_ioctl+0x8d/0x5e0 [<ffffffff811aa329>] ? ____fput+0x9/0x10 [<ffffffff810e9092>] ? task_work_run+0x72/0x90 [<ffffffff811ba627>] SyS_ioctl+0x47/0x80 [<ffffffff8185f5df>] entry_SYSCALL_64_fastpath+0x17/0x93 ---[ end trace 7899b295e4f850c8 ]--- It seems fairly obvious that device_create_file() is not being protected from being run concurrently on the same nbd. Quentin found the following relevant commits: 1a2ad21 nbd: add locking to nbd_ioctl 90b8f28 [PATCH] end of methods switch: remove the old ones d4430d6 [PATCH] beginning of methods conversion 08f8585 [PATCH] move block_device_operations to blkdev.h It would seem that the race was introduced in the process of moving nbd from BKL to unlocked ioctls. By setting nbd->task_recv while the mutex is held, we can prevent other processes from running concurrently (since nbd->task_recv is also checked while the mutex is held). Reported-and-tested-by: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Markus Pargmann <mpa@pengutronix.de> Cc: Paul Clements <paul.clements@steeleye.com> Cc: Pavel Machek <pavel@suse.cz> Cc: Jens Axboe <axboe@fb.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04floppy: fix open(O_ACCMODE) for ioctl-only openJiri Kosina1-12/+9
Commit 09954bad4 ("floppy: refactor open() flags handling"), as a side-effect, causes open(/dev/fdX, O_ACCMODE) to fail. It turns out that this is being used setfdprm userspace for ioctl-only open(). Reintroduce back the original behavior wrt !(FMODE_READ|FMODE_WRITE) modes, while still keeping the original O_NDELAY bug fixed. Cc: stable@vger.kernel.org # v4.5+ Reported-by: Wim Osterholt <wim@djo.tudelft.nl> Tested-by: Wim Osterholt <wim@djo.tudelft.nl> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-02Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-1/+1
Merge yet more updates from Andrew Morton: - the rest of ocfs2 - various hotfixes, mainly MM - quite a bit of misc stuff - drivers, fork, exec, signals, etc. - printk updates - firmware - checkpatch - nilfs2 - more kexec stuff than usual - rapidio updates - w1 things * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (111 commits) ipc: delete "nr_ipc_ns" kcov: allow more fine-grained coverage instrumentation init/Kconfig: add clarification for out-of-tree modules config: add android config fragments init/Kconfig: ban CONFIG_LOCALVERSION_AUTO with allmodconfig relay: add global mode support for buffer-only channels init: allow blacklisting of module_init functions w1:omap_hdq: fix regression w1: add helper macro module_w1_family w1: remove need for ida and use PLATFORM_DEVID_AUTO rapidio/switches: add driver for IDT gen3 switches powerpc/fsl_rio: apply changes for RIO spec rev 3 rapidio: modify for rev.3 specification changes rapidio: change inbound window size type to u64 rapidio/idt_gen2: fix locking warning rapidio: fix error handling in mbox request/release functions rapidio/tsi721_dma: advance queue processing from transfer submit call rapidio/tsi721: add messaging mbox selector parameter rapidio/tsi721: add PCIe MRRS override parameter rapidio/tsi721_dma: add channel mask and queue size parameters ...
2016-08-02Merge tag 'ceph-for-4.8-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds1-7/+8
Pull Ceph updates from Ilya Dryomov: "The highlights are: - RADOS namespace support in libceph and CephFS (Zheng Yan and myself). The stopgaps added in 4.5 to deny access to inodes in namespaces are removed and CEPH_FEATURE_FS_FILE_LAYOUT_V2 feature bit is now fully supported - A large rework of the MDS cap flushing code (Zheng Yan) - Handle some of ->d_revalidate() in RCU mode (Jeff Layton). We were overly pessimistic before, bailing at the first sight of LOOKUP_RCU On top of that we've got a few CephFS bug fixes, a couple of cleanups and Arnd's workaround for a weird genksyms issue" * tag 'ceph-for-4.8-rc1' of git://github.com/ceph/ceph-client: (34 commits) ceph: fix symbol versioning for ceph_monc_do_statfs ceph: Correctly return NXIO errors from ceph_llseek ceph: Mark the file cache as unreclaimable ceph: optimize cap flush waiting ceph: cleanup ceph_flush_snaps() ceph: kick cap flushes before sending other cap message ceph: introduce an inode flag to indicates if snapflush is needed ceph: avoid sending duplicated cap flush message ceph: unify cap flush and snapcap flush ceph: use list instead of rbtree to track cap flushes ceph: update types of some local varibles ceph: include 'follows' of pending snapflush in cap reconnect message ceph: update cap reconnect message to version 3 ceph: mount non-default filesystem by name libceph: fsmap.user subscription support ceph: handle LOOKUP_RCU in ceph_d_revalidate ceph: allow dentry_lease_is_valid to work under RCU walk ceph: clear d_fsinfo pointer under d_lock ceph: remove ceph_mdsc_lease_release ceph: don't use ->d_time ...
2016-08-02dynamic_debug: only add header when usedLuis de Bethencourt2-1/+1
kernel.h header doesn't directly use dynamic debug, instead we can include it in module.c (which used it via kernel.h). printk.h only uses it if CONFIG_DYNAMIC_DEBUG is on, changing the inclusion to only happen in that case. Link: http://lkml.kernel.org/r/1468429793-16917-1-git-send-email-luisbg@osg.samsung.com [luisbg@osg.samsung.com: include dynamic_debug.h in drb_int.h] Link: http://lkml.kernel.org/r/1468447828-18558-2-git-send-email-luisbg@osg.samsung.com Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Cc: Borislav Petkov <bp@suse.de> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-28Merge tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimmLinus Torvalds1-2/+2
Pull libnvdimm updates from Dan Williams: - Replace pcommit with ADR / directed-flushing. The pcommit instruction, which has not shipped on any product, is deprecated. Instead, the requirement is that platforms implement either ADR, or provide one or more flush addresses per nvdimm. ADR (Asynchronous DRAM Refresh) flushes data in posted write buffers to the memory controller on a power-fail event. Flush addresses are defined in ACPI 6.x as an NVDIMM Firmware Interface Table (NFIT) sub-structure: "Flush Hint Address Structure". A flush hint is an mmio address that when written and fenced assures that all previous posted writes targeting a given dimm have been flushed to media. - On-demand ARS (address range scrub). Linux uses the results of the ACPI ARS commands to track bad blocks in pmem devices. When latent errors are detected we re-scrub the media to refresh the bad block list, userspace can also request a re-scrub at any time. - Support for the Microsoft DSM (device specific method) command format. - Support for EDK2/OVMF virtual disk device memory ranges. - Various fixes and cleanups across the subsystem. * tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (41 commits) libnvdimm-btt: Delete an unnecessary check before the function call "__nd_device_register" nfit: do an ARS scrub on hitting a latent media error nfit: move to nfit/ sub-directory nfit, libnvdimm: allow an ARS scrub to be triggered on demand libnvdimm: register nvdimm_bus devices with an nd_bus driver pmem: clarify a debug print in pmem_clear_poison x86/insn: remove pcommit Revert "KVM: x86: add pcommit support" nfit, tools/testing/nvdimm/: unify shutdown paths libnvdimm: move ->module to struct nvdimm_bus_descriptor nfit: cleanup acpi_nfit_init calling convention nfit: fix _FIT evaluation memory leak + use after free tools/testing/nvdimm: add manufacturing_{date|location} dimm properties tools/testing/nvdimm: add virtual ramdisk range acpi, nfit: treat virtual ramdisk SPA as pmem region pmem: kill __pmem address space pmem: kill wmb_pmem() libnvdimm, pmem: use nvdimm_flush() for namespace I/O writes fs/dax: remove wmb_pmem() libnvdimm, pmem: flush posted-write queues on shutdown ...
2016-07-28Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-4/+0
Pull vfs updates from Al Viro: "Assorted cleanups and fixes. Probably the most interesting part long-term is ->d_init() - that will have a bunch of followups in (at least) ceph and lustre, but we'll need to sort the barrier-related rules before it can get used for really non-trivial stuff. Another fun thing is the merge of ->d_iput() callers (dentry_iput() and dentry_unlink_inode()) and a bunch of ->d_compare() ones (all except the one in __d_lookup_lru())" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits) fs/dcache.c: avoid soft-lockup in dput() vfs: new d_init method vfs: Update lookup_dcache() comment bdev: get rid of ->bd_inodes Remove last traces of ->sync_page new helper: d_same_name() dentry_cmp(): use lockless_dereference() instead of smp_read_barrier_depends() vfs: clean up documentation vfs: document ->d_real() vfs: merge .d_select_inode() into .d_real() unify dentry_iput() and dentry_unlink_inode() binfmt_misc: ->s_root is not going anywhere drop redundant ->owner initializations ufs: get rid of redundant checks orangefs: constify inode_operations missed comment updates from ->direct_IO() prototype change file_inode(f)->i_mapping is f->f_mapping trim fsnotify hooks a bit 9p: new helper - v9fs_parent_fid() debugfs: ->d_parent is never NULL or negative ...
2016-07-28libceph: rados pool namespace supportYan, Zheng1-0/+1
Add pool namesapce pointer to struct ceph_file_layout and struct ceph_object_locator. Pool namespace is used by when mapping object to PG, it's also used when composing OSD request. The namespace pointer in struct ceph_file_layout is RCU protected. So libceph can read namespace without taking lock. Signed-off-by: Yan, Zheng <zyan@redhat.com> [idryomov@gmail.com: ceph_oloc_destroy(), misc minor changes] Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-07-28libceph: define new ceph_file_layout structureYan, Zheng1-7/+7
Define new ceph_file_layout structure and rename old ceph_file_layout to ceph_file_layout_legacy. This is preparation for adding namespace to ceph_file_layout structure. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-07-27Merge tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tipLinus Torvalds2-33/+30
Pull xen updates from David Vrabel: "Features and fixes for 4.8-rc0: - ACPI support for guests on ARM platforms. - Generic steal time support for arm and x86. - Support cases where kernel cpu is not Xen VCPU number (e.g., if in-guest kexec is used). - Use the system workqueue instead of a custom workqueue in various places" * tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (47 commits) xen: add static initialization of steal_clock op to xen_time_ops xen/pvhvm: run xen_vcpu_setup() for the boot CPU xen/evtchn: use xen_vcpu_id mapping xen/events: fifo: use xen_vcpu_id mapping xen/events: use xen_vcpu_id mapping in events_base x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op xen: introduce xen_vcpu_id mapping x86/acpi: store ACPI ids from MADT for future usage x86/xen: update cpuid.h from Xen-4.7 xen/evtchn: add IOCTL_EVTCHN_RESTRICT xen-blkback: really don't leak mode property xen-blkback: constify instance of "struct attribute_group" xen-blkfront: prefer xenbus_scanf() over xenbus_gather() xen-blkback: prefer xenbus_scanf() over xenbus_gather() xen: support runqueue steal time on xen arm/xen: add support for vm_assist hypercall xen: update xen headers xen-pciback: drop superfluous variables xen-pciback: short-circuit read path used for merging write values ...
2016-07-26Merge branch 'akpm' (patches from Andrew)Linus Torvalds10-266/+138
Merge updates from Andrew Morton: - a few misc bits - ocfs2 - most(?) of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (125 commits) thp: fix comments of __pmd_trans_huge_lock() cgroup: remove unnecessary 0 check from css_from_id() cgroup: fix idr leak for the first cgroup root mm: memcontrol: fix documentation for compound parameter mm: memcontrol: remove BUG_ON in uncharge_list mm: fix build warnings in <linux/compaction.h> mm, thp: convert from optimistic swapin collapsing to conservative mm, thp: fix comment inconsistency for swapin readahead functions thp: update Documentation/{vm/transhuge,filesystems/proc}.txt shmem: split huge pages beyond i_size under memory pressure thp: introduce CONFIG_TRANSPARENT_HUGE_PAGECACHE khugepaged: add support of collapse for tmpfs/shmem pages shmem: make shmem_inode_info::lock irq-safe khugepaged: move up_read(mmap_sem) out of khugepaged_alloc_page() thp: extract khugepaged from mm/huge_memory.c shmem, thp: respect MADV_{NO,}HUGEPAGE for file mappings shmem: add huge pages support shmem: get_unmapped_area align huge page shmem: prepare huge= mount option and sysfs knob mm, rmap: account shmem thp pages ...
2016-07-26zram: use __GFP_MOVABLE for memory allocationMinchan Kim1-2/+4
Zsmalloc is ready for page migration so zram can use __GFP_MOVABLE from now on. I did test to see how it helps to make higher order pages. Test scenario is as follows. KVM guest, 1G memory, ext4 formated zram block device, for i in `seq 1 8`; do dd if=/dev/vda1 of=mnt/test$i.txt bs=128M count=1 & done wait `pidof dd` for i in `seq 1 2 8`; do rm -rf mnt/test$i.txt done fstrim -v mnt echo "init" cat /proc/buddyinfo echo "compaction" echo 1 > /proc/sys/vm/compact_memory cat /proc/buddyinfo old: init Node 0, zone DMA 208 120 51 41 11 0 0 0 0 0 0 Node 0, zone DMA32 16380 13777 9184 3805 789 54 3 0 0 0 0 compaction Node 0, zone DMA 132 82 40 39 16 2 1 0 0 0 0 Node 0, zone DMA32 5219 5526 4969 3455 1831 677 139 15 0 0 0 new: init Node 0, zone DMA 379 115 97 19 2 0 0 0 0 0 0 Node 0, zone DMA32 18891 16774 10862 3947 637 21 0 0 0 0 0 compaction Node 0, zone DMA 214 66 87 29 10 3 0 0 0 0 0 Node 0, zone DMA32 1612 3139 3154 2469 1745 990 384 94 7 0 0 As you can see, compaction made so many high-order pages. Yay! Link: http://lkml.kernel.org/r/1464736881-24886-13-git-send-email-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26zram: drop gfp_t from zcomp_strm_alloc()Sergey Senozhatsky1-4/+4
We now allocate streams from CPU_UP hot-plug path, there are no context-dependent stream allocations anymore and we can schedule from zcomp_strm_alloc(). Use GFP_KERNEL directly and drop a gfp_t parameter. Link: http://lkml.kernel.org/r/20160531122017.2878-9-sergey.senozhatsky@gmail.com Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26zram: add more compression algorithmsSergey Senozhatsky1-0/+9
Add "deflate", "lz4hc", "842" algorithms to the list of known compression backends. The real availability of those algorithms, however, depends on the corresponding CONFIG_CRYPTO_FOO config options. [sergey.senozhatsky@gmail.com: zram-add-more-compression-algorithms-v3] Link: http://lkml.kernel.org/r/20160604024902.11778-7-sergey.senozhatsky@gmail.com Link: http://lkml.kernel.org/r/20160531122017.2878-8-sergey.senozhatsky@gmail.com Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26zram: delete custom lzo/lz4Sergey Senozhatsky8-174/+2
Remove lzo/lz4 backends, we use crypto API now. [sergey.senozhatsky@gmail.com: zram-delete-custom-lzo-lz4-v3] Link: http://lkml.kernel.org/r/20160604024902.11778-6-sergey.senozhatsky@gmail.com Link: http://lkml.kernel.org/r/20160531122017.2878-7-sergey.senozhatsky@gmail.com Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26zram: use crypto api to check alg availabilitySergey Senozhatsky3-33/+49
There is no way to get a string with all the crypto comp algorithms supported by the crypto comp engine, so we need to maintain our own backends list. At the same time we additionally need to use crypto_has_comp() to make sure that the user has requested a compression algorithm that is recognized by the crypto comp engine. Relying on /proc/crypto is not an options here, because it does not show not-yet-inserted compression modules. Example: modprobe zram cat /proc/crypto | grep -i lz4 modprobe lz4 cat /proc/crypto | grep -i lz4 name : lz4 driver : lz4-generic module : lz4 So the user can't tell exactly if the lz4 is really supported from /proc/crypto output, unless someone or something has loaded it. This patch also adds crypto_has_comp() to zcomp_available_show(). We store all the compression algorithms names in zcomp's `backends' array, regardless the CONFIG_CRYPTO_FOO configuration, but show only those that are also supported by crypto engine. This helps user to know the exact list of compression algorithms that can be used. Example: module lz4 is not loaded yet, but is supported by the crypto engine. /proc/crypto has no information on this module, while zram's `comp_algorithm' lists it: cat /proc/crypto | grep -i lz4 cat /sys/block/zram0/comp_algorithm [lzo] lz4 deflate lz4hc 842 We still use the `backends' array to determine if the requested compression backend is known to crypto api. This array, however, may not contain some entries, therefore as the last step we call crypto_has_comp() function which attempts to insmod the requested compression algorithm to determine if crypto api supports it. The advantage of this method is that now we permit the usage of out-of-tree crypto compression modules (implementing S/W or H/W compression). [sergey.senozhatsky@gmail.com: zram-use-crypto-api-to-check-alg-availability-v3] Link: http://lkml.kernel.org/r/20160604024902.11778-4-sergey.senozhatsky@gmail.com Link: http://lkml.kernel.org/r/20160531122017.2878-5-sergey.senozhatsky@gmail.com Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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