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  1. 22 Jan, 2021 1 commit
  3. 31 Dec, 2020 1 commit
  5. 22 Dec, 2020 2 commits
    • Bob Peterson's avatar
      gfs2: move freeze glock outside the make_fs_rw and _ro functions · 96b1454f
      Bob Peterson authored 
      Before this patch, sister functions gfs2_make_fs_rw and gfs2_make_fs_ro locked
(held) the freeze glock by calling gfs2_freeze_lock and gfs2_freeze_unlock.
The problem is, not all the callers of gfs2_make_fs_ro should be doing this.
The three callers of gfs2_make_fs_ro are: remount (gfs2_reconfigure),
signal_our_withdraw, and unmount (gfs2_put_super). But when unmounting the
file system we can get into the following circular lock dependency:

deactivate_super
   down_write(&s->s_umount); <-------------------------------------- s_umount
   deactivate_locked_super
      gfs2_kill_sb
         kill_block_super
            generic_shutdown_super
               gfs2_put_super
                  gfs2_make_fs_ro
                     gfs2_glock_nq_init sd_freeze_gl
                        freeze_go_sync
                           if (freeze glock in SH)
                              freeze_super (vfs)
                                 down_write(&sb->s_umount); <------- s_umount

This patch moves the hold of the freeze glock outside the two sister rw/ro
functions to their callers, but it doesn't request the glock from
gfs2_put_super, thus eliminating the circular dependency.
Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
      96b1454f
    • Bob Peterson's avatar
      gfs2: Add common helper for holding and releasing the freeze glock · c77b52c0
      Bob Peterson authored 
      Many places in the gfs2 code queued and dequeued the freeze glock.
Almost all of them acquire it in SHARED mode, and need to specify the
same LM_FLAG_NOEXP and GL_EXACT flags.

This patch adds common helper functions gfs2_freeze_lock and gfs2_freeze_unlock
to make the code more readable, and to prepare for the next patch.
Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
      c77b52c0
  7. 20 Dec, 2020 2 commits
  9. 19 Dec, 2020 32 commits
  11. 18 Dec, 2020 2 commits
    • Kent Overstreet's avatar
      mm/filemap: fix infinite loop in generic_file_buffered_read() · 3644e2d2
      Kent Overstreet authored 
      If iter->count is 0 and iocb->ki_pos is page aligned, this causes
nr_pages to be 0.

Then in generic_file_buffered_read_get_pages() find_get_pages_contig()
returns 0 - because we asked for 0 pages, so we call
generic_file_buffered_read_no_cached_page() which attempts to add a page
to the page cache, which fails with -EEXIST, and then we loop. Oops...
Signed-off-by: default avatarKent Overstreet <kent.overstreet@gmail.com>
Reported-by: default avatarJens Axboe <axboe@kernel.dk>
Reviewed-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      3644e2d2
    • Linus Torvalds's avatar
      Merge tag 'xfs-5.11-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · a0b96314
      Linus Torvalds authored 
      Pull xfs updates from Darrick Wong:
 "In this release we add the ability to set a 'needsrepair' flag
  indicating that we /know/ the filesystem requires xfs_repair, but
  other than that, it's the usual strengthening of metadata validation
  and miscellaneous cleanups.

  Summary:

   - Introduce a "needsrepair" "feature" to flag a filesystem as needing
     a pass through xfs_repair. This is key to enabling filesystem
     upgrades (in xfs_db) that require xfs_repair to make minor
     adjustments to metadata.

   - Refactor parameter checking of recovered log intent items so that
     we actually use the same validation code as them that generate the
     intent items.

   - Various fixes to online scrub not reacting correctly to directory
     entries pointing to inodes that cannot be igetted.

   - Refactor validation helpers for data and rt volume extents.

   - Refactor XFS_TRANS_DQ_DIRTY out of existence.

   - Fix a longstanding bug where mounting with "uqnoenforce" would
     start user quotas in non-enforcing mode but /proc/mounts would
     display "usrquota", implying that they are being enforced.

   - Don't flag dax+reflink inodes as corruption since that is a valid
     (but not fully functional) combination right now.

   - Clean up raid stripe validation functions.

   - Refactor the inode allocation code to be more straightforward.

   - Small prep cleanup for idmapping support.

   - Get rid of the xfs_buf_t typedef"

* tag 'xfs-5.11-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (40 commits)
  xfs: remove xfs_buf_t typedef
  fs/xfs: convert comma to semicolon
  xfs: open code updating i_mode in xfs_set_acl
  xfs: remove xfs_vn_setattr_nonsize
  xfs: kill ialloced in xfs_dialloc()
  xfs: spilt xfs_dialloc() into 2 functions
  xfs: move xfs_dialloc_roll() into xfs_dialloc()
  xfs: move on-disk inode allocation out of xfs_ialloc()
  xfs: introduce xfs_dialloc_roll()
  xfs: convert noroom, okalloc in xfs_dialloc() to bool
  xfs: don't catch dax+reflink inodes as corruption in verifier
  xfs: fix the forward progress assertion in xfs_iwalk_run_callbacks
  xfs: remove unneeded return value check for *init_cursor()
  xfs: introduce xfs_validate_stripe_geometry()
  xfs: show the proper user quota options
  xfs: remove the unused XFS_B_FSB_OFFSET macro
  xfs: remove unnecessary null check in xfs_generic_create
  xfs: directly return if the delta equal to zero
  xfs: check tp->t_dqinfo value instead of the XFS_TRANS_DQ_DIRTY flag
  xfs: delete duplicated tp->t_dqinfo null check and allocation
  ...
      a0b96314
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