1. 11 7月, 2017 1 次提交
  2. 06 7月, 2017 3 次提交
    • J
      fs: new infrastructure for writeback error handling and reporting · 5660e13d
      Jeff Layton 提交于
      Most filesystems currently use mapping_set_error and
      filemap_check_errors for setting and reporting/clearing writeback errors
      at the mapping level. filemap_check_errors is indirectly called from
      most of the filemap_fdatawait_* functions and from
      filemap_write_and_wait*. These functions are called from all sorts of
      contexts to wait on writeback to finish -- e.g. mostly in fsync, but
      also in truncate calls, getattr, etc.
      
      The non-fsync callers are problematic. We should be reporting writeback
      errors during fsync, but many places spread over the tree clear out
      errors before they can be properly reported, or report errors at
      nonsensical times.
      
      If I get -EIO on a stat() call, there is no reason for me to assume that
      it is because some previous writeback failed. The fact that it also
      clears out the error such that a subsequent fsync returns 0 is a bug,
      and a nasty one since that's potentially silent data corruption.
      
      This patch adds a small bit of new infrastructure for setting and
      reporting errors during address_space writeback. While the above was my
      original impetus for adding this, I think it's also the case that
      current fsync semantics are just problematic for userland. Most
      applications that call fsync do so to ensure that the data they wrote
      has hit the backing store.
      
      In the case where there are multiple writers to the file at the same
      time, this is really hard to determine. The first one to call fsync will
      see any stored error, and the rest get back 0. The processes with open
      fds may not be associated with one another in any way. They could even
      be in different containers, so ensuring coordination between all fsync
      callers is not really an option.
      
      One way to remedy this would be to track what file descriptor was used
      to dirty the file, but that's rather cumbersome and would likely be
      slow. However, there is a simpler way to improve the semantics here
      without incurring too much overhead.
      
      This set adds an errseq_t to struct address_space, and a corresponding
      one is added to struct file. Writeback errors are recorded in the
      mapping's errseq_t, and the one in struct file is used as the "since"
      value.
      
      This changes the semantics of the Linux fsync implementation such that
      applications can now use it to determine whether there were any
      writeback errors since fsync(fd) was last called (or since the file was
      opened in the case of fsync having never been called).
      
      Note that those writeback errors may have occurred when writing data
      that was dirtied via an entirely different fd, but that's the case now
      with the current mapping_set_error/filemap_check_error infrastructure.
      This will at least prevent you from getting a false report of success.
      
      The new behavior is still consistent with the POSIX spec, and is more
      reliable for application developers. This patch just adds some basic
      infrastructure for doing this, and ensures that the f_wb_err "cursor"
      is properly set when a file is opened. Later patches will change the
      existing code to use this new infrastructure for reporting errors at
      fsync time.
      Signed-off-by: NJeff Layton <jlayton@redhat.com>
      Reviewed-by: NJan Kara <jack@suse.cz>
      5660e13d
    • J
      jbd2: don't clear and reset errors after waiting on writeback · 76341cab
      Jeff Layton 提交于
      Resetting this flag is almost certainly racy, and will be problematic
      with some coming changes.
      
      Make filemap_fdatawait_keep_errors return int, but not clear the flag(s).
      Have jbd2 call it instead of filemap_fdatawait and don't attempt to
      re-set the error flag if it fails.
      Reviewed-by: NJan Kara <jack@suse.cz>
      Reviewed-by: NCarlos Maiolino <cmaiolino@redhat.com>
      Signed-off-by: NJeff Layton <jlayton@redhat.com>
      76341cab
    • J
      fs: remove call_fsync helper function · 0f41074a
      Jeff Layton 提交于
      Reviewed-by: NChristoph Hellwig <hch@lst.de>
      Reviewed-by: NJan Kara <jack@suse.cz>
      Reviewed-by: NCarlos Maiolino <cmaiolino@redhat.com>
      Signed-off-by: NJeff Layton <jlayton@redhat.com>
      0f41074a
  3. 30 6月, 2017 2 次提交
  4. 28 6月, 2017 1 次提交
    • J
      fs: add fcntl() interface for setting/getting write life time hints · c75b1d94
      Jens Axboe 提交于
      Define a set of write life time hints:
      
      RWH_WRITE_LIFE_NOT_SET	No hint information set
      RWH_WRITE_LIFE_NONE	No hints about write life time
      RWH_WRITE_LIFE_SHORT	Data written has a short life time
      RWH_WRITE_LIFE_MEDIUM	Data written has a medium life time
      RWH_WRITE_LIFE_LONG	Data written has a long life time
      RWH_WRITE_LIFE_EXTREME	Data written has an extremely long life time
      
      The intent is for these values to be relative to each other, no
      absolute meaning should be attached to these flag names.
      
      Add an fcntl interface for querying these flags, and also for
      setting them as well:
      
      F_GET_RW_HINT		Returns the read/write hint set on the
      			underlying inode.
      
      F_SET_RW_HINT		Set one of the above write hints on the
      			underlying inode.
      
      F_GET_FILE_RW_HINT	Returns the read/write hint set on the
      			file descriptor.
      
      F_SET_FILE_RW_HINT	Set one of the above write hints on the
      			file descriptor.
      
      The user passes in a 64-bit pointer to get/set these values, and
      the interface returns 0/-1 on success/error.
      
      Sample program testing/implementing basic setting/getting of write
      hints is below.
      
      Add support for storing the write life time hint in the inode flags
      and in struct file as well, and pass them to the kiocb flags. If
      both a file and its corresponding inode has a write hint, then we
      use the one in the file, if available. The file hint can be used
      for sync/direct IO, for buffered writeback only the inode hint
      is available.
      
      This is in preparation for utilizing these hints in the block layer,
      to guide on-media data placement.
      
      /*
       * writehint.c: get or set an inode write hint
       */
       #include <stdio.h>
       #include <fcntl.h>
       #include <stdlib.h>
       #include <unistd.h>
       #include <stdbool.h>
       #include <inttypes.h>
      
       #ifndef F_GET_RW_HINT
       #define F_LINUX_SPECIFIC_BASE	1024
       #define F_GET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 11)
       #define F_SET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 12)
       #endif
      
      static char *str[] = { "RWF_WRITE_LIFE_NOT_SET", "RWH_WRITE_LIFE_NONE",
      			"RWH_WRITE_LIFE_SHORT", "RWH_WRITE_LIFE_MEDIUM",
      			"RWH_WRITE_LIFE_LONG", "RWH_WRITE_LIFE_EXTREME" };
      
      int main(int argc, char *argv[])
      {
      	uint64_t hint;
      	int fd, ret;
      
      	if (argc < 2) {
      		fprintf(stderr, "%s: file <hint>\n", argv[0]);
      		return 1;
      	}
      
      	fd = open(argv[1], O_RDONLY);
      	if (fd < 0) {
      		perror("open");
      		return 2;
      	}
      
      	if (argc > 2) {
      		hint = atoi(argv[2]);
      		ret = fcntl(fd, F_SET_RW_HINT, &hint);
      		if (ret < 0) {
      			perror("fcntl: F_SET_RW_HINT");
      			return 4;
      		}
      	}
      
      	ret = fcntl(fd, F_GET_RW_HINT, &hint);
      	if (ret < 0) {
      		perror("fcntl: F_GET_RW_HINT");
      		return 3;
      	}
      
      	printf("%s: hint %s\n", argv[1], str[hint]);
      	close(fd);
      	return 0;
      }
      Reviewed-by: NMartin K. Petersen <martin.petersen@oracle.com>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      c75b1d94
  5. 20 6月, 2017 4 次提交
  6. 14 6月, 2017 1 次提交
  7. 09 6月, 2017 1 次提交
  8. 05 6月, 2017 1 次提交
  9. 27 5月, 2017 1 次提交
  10. 13 5月, 2017 1 次提交
  11. 09 5月, 2017 1 次提交
  12. 05 5月, 2017 1 次提交
  13. 27 4月, 2017 2 次提交
  14. 21 4月, 2017 3 次提交
  15. 10 4月, 2017 2 次提交
    • J
      fsnotify: Free fsnotify_mark_connector when there is no mark attached · 08991e83
      Jan Kara 提交于
      Currently we free fsnotify_mark_connector structure only when inode /
      vfsmount is getting freed. This can however impose noticeable memory
      overhead when marks get attached to inodes only temporarily. So free the
      connector structure once the last mark is detached from the object.
      Since notification infrastructure can be working with the connector
      under the protection of fsnotify_mark_srcu, we have to be careful and
      free the fsnotify_mark_connector only after SRCU period passes.
      Reviewed-by: NMiklos Szeredi <mszeredi@redhat.com>
      Reviewed-by: NAmir Goldstein <amir73il@gmail.com>
      Signed-off-by: NJan Kara <jack@suse.cz>
      08991e83
    • J
      fsnotify: Move mark list head from object into dedicated structure · 9dd813c1
      Jan Kara 提交于
      Currently notification marks are attached to object (inode or vfsmnt) by
      a hlist_head in the object. The list is also protected by a spinlock in
      the object. So while there is any mark attached to the list of marks,
      the object must be pinned in memory (and thus e.g. last iput() deleting
      inode cannot happen). Also for list iteration in fsnotify() to work, we
      must hold fsnotify_mark_srcu lock so that mark itself and
      mark->obj_list.next cannot get freed. Thus we are required to wait for
      response to fanotify events from userspace process with
      fsnotify_mark_srcu lock held. That causes issues when userspace process
      is buggy and does not reply to some event - basically the whole
      notification subsystem gets eventually stuck.
      
      So to be able to drop fsnotify_mark_srcu lock while waiting for
      response, we have to pin the mark in memory and make sure it stays in
      the object list (as removing the mark waiting for response could lead to
      lost notification events for groups later in the list). However we don't
      want inode reclaim to block on such mark as that would lead to system
      just locking up elsewhere.
      
      This commit is the first in the series that paves way towards solving
      these conflicting lifetime needs. Instead of anchoring the list of marks
      directly in the object, we anchor it in a dedicated structure
      (fsnotify_mark_connector) and just point to that structure from the
      object. The following commits will also add spinlock protecting the list
      and object pointer to the structure.
      Reviewed-by: NMiklos Szeredi <mszeredi@redhat.com>
      Reviewed-by: NAmir Goldstein <amir73il@gmail.com>
      Signed-off-by: NJan Kara <jack@suse.cz>
      9dd813c1
  16. 10 3月, 2017 1 次提交
  17. 03 3月, 2017 1 次提交
    • D
      statx: Add a system call to make enhanced file info available · a528d35e
      David Howells 提交于
      Add a system call to make extended file information available, including
      file creation and some attribute flags where available through the
      underlying filesystem.
      
      The getattr inode operation is altered to take two additional arguments: a
      u32 request_mask and an unsigned int flags that indicate the
      synchronisation mode.  This change is propagated to the vfs_getattr*()
      function.
      
      Functions like vfs_stat() are now inline wrappers around new functions
      vfs_statx() and vfs_statx_fd() to reduce stack usage.
      
      ========
      OVERVIEW
      ========
      
      The idea was initially proposed as a set of xattrs that could be retrieved
      with getxattr(), but the general preference proved to be for a new syscall
      with an extended stat structure.
      
      A number of requests were gathered for features to be included.  The
      following have been included:
      
       (1) Make the fields a consistent size on all arches and make them large.
      
       (2) Spare space, request flags and information flags are provided for
           future expansion.
      
       (3) Better support for the y2038 problem [Arnd Bergmann] (tv_sec is an
           __s64).
      
       (4) Creation time: The SMB protocol carries the creation time, which could
           be exported by Samba, which will in turn help CIFS make use of
           FS-Cache as that can be used for coherency data (stx_btime).
      
           This is also specified in NFSv4 as a recommended attribute and could
           be exported by NFSD [Steve French].
      
       (5) Lightweight stat: Ask for just those details of interest, and allow a
           netfs (such as NFS) to approximate anything not of interest, possibly
           without going to the server [Trond Myklebust, Ulrich Drepper, Andreas
           Dilger] (AT_STATX_DONT_SYNC).
      
       (6) Heavyweight stat: Force a netfs to go to the server, even if it thinks
           its cached attributes are up to date [Trond Myklebust]
           (AT_STATX_FORCE_SYNC).
      
      And the following have been left out for future extension:
      
       (7) Data version number: Could be used by userspace NFS servers [Aneesh
           Kumar].
      
           Can also be used to modify fill_post_wcc() in NFSD which retrieves
           i_version directly, but has just called vfs_getattr().  It could get
           it from the kstat struct if it used vfs_xgetattr() instead.
      
           (There's disagreement on the exact semantics of a single field, since
           not all filesystems do this the same way).
      
       (8) BSD stat compatibility: Including more fields from the BSD stat such
           as creation time (st_btime) and inode generation number (st_gen)
           [Jeremy Allison, Bernd Schubert].
      
       (9) Inode generation number: Useful for FUSE and userspace NFS servers
           [Bernd Schubert].
      
           (This was asked for but later deemed unnecessary with the
           open-by-handle capability available and caused disagreement as to
           whether it's a security hole or not).
      
      (10) Extra coherency data may be useful in making backups [Andreas Dilger].
      
           (No particular data were offered, but things like last backup
           timestamp, the data version number and the DOS archive bit would come
           into this category).
      
      (11) Allow the filesystem to indicate what it can/cannot provide: A
           filesystem can now say it doesn't support a standard stat feature if
           that isn't available, so if, for instance, inode numbers or UIDs don't
           exist or are fabricated locally...
      
           (This requires a separate system call - I have an fsinfo() call idea
           for this).
      
      (12) Store a 16-byte volume ID in the superblock that can be returned in
           struct xstat [Steve French].
      
           (Deferred to fsinfo).
      
      (13) Include granularity fields in the time data to indicate the
           granularity of each of the times (NFSv4 time_delta) [Steve French].
      
           (Deferred to fsinfo).
      
      (14) FS_IOC_GETFLAGS value.  These could be translated to BSD's st_flags.
           Note that the Linux IOC flags are a mess and filesystems such as Ext4
           define flags that aren't in linux/fs.h, so translation in the kernel
           may be a necessity (or, possibly, we provide the filesystem type too).
      
           (Some attributes are made available in stx_attributes, but the general
           feeling was that the IOC flags were to ext[234]-specific and shouldn't
           be exposed through statx this way).
      
      (15) Mask of features available on file (eg: ACLs, seclabel) [Brad Boyer,
           Michael Kerrisk].
      
           (Deferred, probably to fsinfo.  Finding out if there's an ACL or
           seclabal might require extra filesystem operations).
      
      (16) Femtosecond-resolution timestamps [Dave Chinner].
      
           (A __reserved field has been left in the statx_timestamp struct for
           this - if there proves to be a need).
      
      (17) A set multiple attributes syscall to go with this.
      
      ===============
      NEW SYSTEM CALL
      ===============
      
      The new system call is:
      
      	int ret = statx(int dfd,
      			const char *filename,
      			unsigned int flags,
      			unsigned int mask,
      			struct statx *buffer);
      
      The dfd, filename and flags parameters indicate the file to query, in a
      similar way to fstatat().  There is no equivalent of lstat() as that can be
      emulated with statx() by passing AT_SYMLINK_NOFOLLOW in flags.  There is
      also no equivalent of fstat() as that can be emulated by passing a NULL
      filename to statx() with the fd of interest in dfd.
      
      Whether or not statx() synchronises the attributes with the backing store
      can be controlled by OR'ing a value into the flags argument (this typically
      only affects network filesystems):
      
       (1) AT_STATX_SYNC_AS_STAT tells statx() to behave as stat() does in this
           respect.
      
       (2) AT_STATX_FORCE_SYNC will require a network filesystem to synchronise
           its attributes with the server - which might require data writeback to
           occur to get the timestamps correct.
      
       (3) AT_STATX_DONT_SYNC will suppress synchronisation with the server in a
           network filesystem.  The resulting values should be considered
           approximate.
      
      mask is a bitmask indicating the fields in struct statx that are of
      interest to the caller.  The user should set this to STATX_BASIC_STATS to
      get the basic set returned by stat().  It should be noted that asking for
      more information may entail extra I/O operations.
      
      buffer points to the destination for the data.  This must be 256 bytes in
      size.
      
      ======================
      MAIN ATTRIBUTES RECORD
      ======================
      
      The following structures are defined in which to return the main attribute
      set:
      
      	struct statx_timestamp {
      		__s64	tv_sec;
      		__s32	tv_nsec;
      		__s32	__reserved;
      	};
      
      	struct statx {
      		__u32	stx_mask;
      		__u32	stx_blksize;
      		__u64	stx_attributes;
      		__u32	stx_nlink;
      		__u32	stx_uid;
      		__u32	stx_gid;
      		__u16	stx_mode;
      		__u16	__spare0[1];
      		__u64	stx_ino;
      		__u64	stx_size;
      		__u64	stx_blocks;
      		__u64	__spare1[1];
      		struct statx_timestamp	stx_atime;
      		struct statx_timestamp	stx_btime;
      		struct statx_timestamp	stx_ctime;
      		struct statx_timestamp	stx_mtime;
      		__u32	stx_rdev_major;
      		__u32	stx_rdev_minor;
      		__u32	stx_dev_major;
      		__u32	stx_dev_minor;
      		__u64	__spare2[14];
      	};
      
      The defined bits in request_mask and stx_mask are:
      
      	STATX_TYPE		Want/got stx_mode & S_IFMT
      	STATX_MODE		Want/got stx_mode & ~S_IFMT
      	STATX_NLINK		Want/got stx_nlink
      	STATX_UID		Want/got stx_uid
      	STATX_GID		Want/got stx_gid
      	STATX_ATIME		Want/got stx_atime{,_ns}
      	STATX_MTIME		Want/got stx_mtime{,_ns}
      	STATX_CTIME		Want/got stx_ctime{,_ns}
      	STATX_INO		Want/got stx_ino
      	STATX_SIZE		Want/got stx_size
      	STATX_BLOCKS		Want/got stx_blocks
      	STATX_BASIC_STATS	[The stuff in the normal stat struct]
      	STATX_BTIME		Want/got stx_btime{,_ns}
      	STATX_ALL		[All currently available stuff]
      
      stx_btime is the file creation time, stx_mask is a bitmask indicating the
      data provided and __spares*[] are where as-yet undefined fields can be
      placed.
      
      Time fields are structures with separate seconds and nanoseconds fields
      plus a reserved field in case we want to add even finer resolution.  Note
      that times will be negative if before 1970; in such a case, the nanosecond
      fields will also be negative if not zero.
      
      The bits defined in the stx_attributes field convey information about a
      file, how it is accessed, where it is and what it does.  The following
      attributes map to FS_*_FL flags and are the same numerical value:
      
      	STATX_ATTR_COMPRESSED		File is compressed by the fs
      	STATX_ATTR_IMMUTABLE		File is marked immutable
      	STATX_ATTR_APPEND		File is append-only
      	STATX_ATTR_NODUMP		File is not to be dumped
      	STATX_ATTR_ENCRYPTED		File requires key to decrypt in fs
      
      Within the kernel, the supported flags are listed by:
      
      	KSTAT_ATTR_FS_IOC_FLAGS
      
      [Are any other IOC flags of sufficient general interest to be exposed
      through this interface?]
      
      New flags include:
      
      	STATX_ATTR_AUTOMOUNT		Object is an automount trigger
      
      These are for the use of GUI tools that might want to mark files specially,
      depending on what they are.
      
      Fields in struct statx come in a number of classes:
      
       (0) stx_dev_*, stx_blksize.
      
           These are local system information and are always available.
      
       (1) stx_mode, stx_nlinks, stx_uid, stx_gid, stx_[amc]time, stx_ino,
           stx_size, stx_blocks.
      
           These will be returned whether the caller asks for them or not.  The
           corresponding bits in stx_mask will be set to indicate whether they
           actually have valid values.
      
           If the caller didn't ask for them, then they may be approximated.  For
           example, NFS won't waste any time updating them from the server,
           unless as a byproduct of updating something requested.
      
           If the values don't actually exist for the underlying object (such as
           UID or GID on a DOS file), then the bit won't be set in the stx_mask,
           even if the caller asked for the value.  In such a case, the returned
           value will be a fabrication.
      
           Note that there are instances where the type might not be valid, for
           instance Windows reparse points.
      
       (2) stx_rdev_*.
      
           This will be set only if stx_mode indicates we're looking at a
           blockdev or a chardev, otherwise will be 0.
      
       (3) stx_btime.
      
           Similar to (1), except this will be set to 0 if it doesn't exist.
      
      =======
      TESTING
      =======
      
      The following test program can be used to test the statx system call:
      
      	samples/statx/test-statx.c
      
      Just compile and run, passing it paths to the files you want to examine.
      The file is built automatically if CONFIG_SAMPLES is enabled.
      
      Here's some example output.  Firstly, an NFS directory that crosses to
      another FSID.  Note that the AUTOMOUNT attribute is set because transiting
      this directory will cause d_automount to be invoked by the VFS.
      
      	[root@andromeda ~]# /tmp/test-statx -A /warthog/data
      	statx(/warthog/data) = 0
      	results=7ff
      	  Size: 4096            Blocks: 8          IO Block: 1048576  directory
      	Device: 00:26           Inode: 1703937     Links: 125
      	Access: (3777/drwxrwxrwx)  Uid:     0   Gid:  4041
      	Access: 2016-11-24 09:02:12.219699527+0000
      	Modify: 2016-11-17 10:44:36.225653653+0000
      	Change: 2016-11-17 10:44:36.225653653+0000
      	Attributes: 0000000000001000 (-------- -------- -------- -------- -------- -------- ---m---- --------)
      
      Secondly, the result of automounting on that directory.
      
      	[root@andromeda ~]# /tmp/test-statx /warthog/data
      	statx(/warthog/data) = 0
      	results=7ff
      	  Size: 4096            Blocks: 8          IO Block: 1048576  directory
      	Device: 00:27           Inode: 2           Links: 125
      	Access: (3777/drwxrwxrwx)  Uid:     0   Gid:  4041
      	Access: 2016-11-24 09:02:12.219699527+0000
      	Modify: 2016-11-17 10:44:36.225653653+0000
      	Change: 2016-11-17 10:44:36.225653653+0000
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      a528d35e
  18. 28 2月, 2017 1 次提交
  19. 20 2月, 2017 3 次提交
  20. 07 2月, 2017 2 次提交
  21. 02 2月, 2017 2 次提交
    • J
      block: Make blk_get_backing_dev_info() safe without open bdev · b1d2dc56
      Jan Kara 提交于
      Currenly blk_get_backing_dev_info() is not safe to be called when the
      block device is not open as bdev->bd_disk is NULL in that case. However
      inode_to_bdi() uses this function and may be call called from flusher
      worker or other writeback related functions without bdev being open
      which leads to crashes such as:
      
      [113031.075540] Unable to handle kernel paging request for data at address 0x00000000
      [113031.075614] Faulting instruction address: 0xc0000000003692e0
      0:mon> t
      [c0000000fb65f900] c00000000036cb6c writeback_sb_inodes+0x30c/0x590
      [c0000000fb65fa10] c00000000036ced4 __writeback_inodes_wb+0xe4/0x150
      [c0000000fb65fa70] c00000000036d33c wb_writeback+0x30c/0x450
      [c0000000fb65fb40] c00000000036e198 wb_workfn+0x268/0x580
      [c0000000fb65fc50] c0000000000f3470 process_one_work+0x1e0/0x590
      [c0000000fb65fce0] c0000000000f38c8 worker_thread+0xa8/0x660
      [c0000000fb65fd80] c0000000000fc4b0 kthread+0x110/0x130
      [c0000000fb65fe30] c0000000000098f0 ret_from_kernel_thread+0x5c/0x6c
      Signed-off-by: NJens Axboe <axboe@fb.com>
      b1d2dc56
    • J
      block: Unhash block device inodes on gendisk destruction · f44f1ab5
      Jan Kara 提交于
      Currently, block device inodes stay around after corresponding gendisk
      hash died until memory reclaim finds them and frees them. Since we will
      make block device inode pin the bdi, we want to free the block device
      inode as soon as the device goes away so that bdi does not stay around
      unnecessarily. Furthermore we need to avoid issues when new device with
      the same major,minor pair gets created since reusing the bdi structure
      would be rather difficult in this case.
      
      Unhashing block device inode on gendisk destruction nicely deals with
      these problems. Once last block device inode reference is dropped (which
      may be directly in del_gendisk()), the inode gets evicted. Furthermore if
      the major,minor pair gets reallocated, we are guaranteed to get new
      block device inode even if old block device inode is not yet evicted and
      thus we avoid issues with possible reuse of bdi.
      Reviewed-by: NChristoph Hellwig <hch@lst.de>
      Signed-off-by: NJan Kara <jack@suse.cz>
      Signed-off-by: NJens Axboe <axboe@fb.com>
      f44f1ab5
  22. 16 12月, 2016 1 次提交
  23. 10 12月, 2016 1 次提交
  24. 09 12月, 2016 3 次提交