linux-toradex.git/fs/ocfs2/super.c, branch v4.18

ocfs2: add kobject for online file check

2018-04-06T04:36:22+00:00

Use embedded kobject mechanism for online file check feature, this will
avoid to use a global list to save/search per-device online file check
related data, meanwhile, reduce the code lines and make the code logic
clear.  The changed code is based on Goldwyn Rodrigues's patches and
ext4 fs code.

Link: http://lkml.kernel.org/r/1495611866-27360-4-git-send-email-ghe@suse.com
Signed-off-by: Gang He 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Junxiao Bi 
Cc: Joseph Qi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ocfs2: remove unnecessary null pointer check before kmem_cache_destroy()

2018-04-06T04:36:22+00:00

As kmem_cache_destroy() already handles null pointers, so we can remove
the conditional test entirely.

Link: http://lkml.kernel.org/r/5A9EB21D.3000209@huawei.com
Signed-off-by: Jun Piao 
Reviewed-by: Yiwen Jiang 
Reviewed-by: Andrew Morton 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Junxiao Bi 
Cc: Joseph Qi 
Cc: Changwei Ge 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ocfs2: use 'osb' instead of 'OCFS2_SB()'

2018-04-06T04:36:21+00:00

We could use 'osb' instead of 'OCFS2_SB()' to make code more elegant.

Link: http://lkml.kernel.org/r/5A702111.7090907@huawei.com
Signed-off-by: Jun Piao 
Reviewed-by: Yiwen Jiang 
Reviewed-by: Andrew Morton 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Junxiao Bi 
Cc: Joseph Qi 
Cc: Changwei Ge 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ocfs2: return -EROFS to mount.ocfs2 if inode block is invalid

2018-02-01T01:18:35+00:00

If metadata is corrupted such as 'invalid inode block', we will get
failed by calling 'mount()' and then set filesystem readonly as below:

  ocfs2_mount
    ocfs2_initialize_super
      ocfs2_init_global_system_inodes
        ocfs2_iget
          ocfs2_read_locked_inode
            ocfs2_validate_inode_block
	      ocfs2_error
	        ocfs2_handle_error
	          ocfs2_set_ro_flag(osb, 0);  // set readonly

In this situation we need return -EROFS to 'mount.ocfs2', so that user
can fix it by fsck.  And then mount again.  In addition, 'mount.ocfs2'
should be updated correspondingly as it only return 1 for all errno.
And I will post a patch for 'mount.ocfs2' too.

Link: http://lkml.kernel.org/r/5A4302FA.2010606@huawei.com
Signed-off-by: Jun Piao 
Reviewed-by: Alex Chen 
Reviewed-by: Joseph Qi 
Reviewed-by: Changwei Ge 
Reviewed-by: Gang He 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Junxiao Bi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ocfs2: give an obvious tip for mismatched cluster names

2018-02-01T01:18:34+00:00

Add an obvious error message, due to mismatched cluster names between
on-disk and in the current cluster.  We can meet this case during OCFS2
cluster migration.

If we can give the user an obvious tip for why they can not mount the
file system after migration, they can quickly fix this mismatch problem.

Second, also move printing ocfs2_fill_super() errno to the front of
ocfs2_dismount_volume(), since ocfs2_dismount_volume() will also print
its own message.

I looked through all the code of OCFS2 (include o2cb); there is not any
place which returns this error.  In fact, the function calling path
ocfs2_fill_super -> ocfs2_mount_volume -> ocfs2_dlm_init ->
dlm_new_lockspace is a very specific one.  We can use this errno to give
the user a more clear tip, since this case is a little common during
cluster migration, but the customer can quickly get the failure cause if
there is a error printed.  Also, I think it is not possible to add this
errno in the o2cb path during ocfs2_dlm_init(), since the o2cb code has
been stable for a long time.

We only print this error tip when the user uses pcmk stack, since using
the o2cb stack the user will not meet this error.

[ghe@suse.com: v2]
  Link: http://lkml.kernel.org/r/1495419305-3780-1-git-send-email-ghe@suse.com
Link: http://lkml.kernel.org/r/1495089336-19312-1-git-send-email-ghe@suse.com
Signed-off-by: Gang He 
Reviewed-by: Mark Fasheh 
Acked-by: Joseph Qi 
Cc: Joel Becker 
Cc: Junxiao Bi 
Cc: Joseph Qi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Rename superblock flags (MS_xyz -> SB_xyz)

2017-11-27T21:05:09+00:00

This is a pure automated search-and-replace of the internal kernel
superblock flags.

The s_flags are now called SB_*, with the names and the values for the
moment mirroring the MS_* flags that they're equivalent to.

Note how the MS_xyz flags are the ones passed to the mount system call,
while the SB_xyz flags are what we then use in sb->s_flags.

The script to do this was:

    # places to look in; re security/*: it generally should *not* be
    # touched (that stuff parses mount(2) arguments directly), but
    # there are two places where we really deal with superblock flags.
    FILES="drivers/mtd drivers/staging/lustre fs ipc mm \
            include/linux/fs.h include/uapi/linux/bfs_fs.h \
            security/apparmor/apparmorfs.c security/apparmor/include/lib.h"
    # the list of MS_... constants
    SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \
          DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \
          POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \
          I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \
          ACTIVE NOUSER"

    SED_PROG=
    for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done

    # we want files that contain at least one of MS_...,
    # with fs/namespace.c and fs/pnode.c excluded.
    L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c')

    for f in $L; do sed -i $f $SED_PROG; done

Requested-by: Al Viro 
Signed-off-by: Linus Torvalds

ocfs2: no need flush workqueue before destroying it

2017-11-16T02:21:01+00:00

destroy_workqueue() will do flushing work for us.

Link: http://lkml.kernel.org/r/59E06476.3090502@huawei.com
Signed-off-by: Jun Piao 
Reviewed-by: Joseph Qi 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Junxiao Bi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-09-15T01:54:01+00:00

Pull mount flag updates from Al Viro:
 "Another chunk of fmount preparations from dhowells; only trivial
  conflicts for that part. It separates MS_... bits (very grotty
  mount(2) ABI) from the struct super_block ->s_flags (kernel-internal,
  only a small subset of MS_... stuff).

  This does *not* convert the filesystems to new constants; only the
  infrastructure is done here. The next step in that series is where the
  conflicts would be; that's the conversion of filesystems. It's purely
  mechanical and it's better done after the merge, so if you could run
  something like

	list=$(for i in MS_RDONLY MS_NOSUID MS_NODEV MS_NOEXEC MS_SYNCHRONOUS MS_MANDLOCK MS_DIRSYNC MS_NOATIME MS_NODIRATIME MS_SILENT MS_POSIXACL MS_KERNMOUNT MS_I_VERSION MS_LAZYTIME; do git grep -l $i fs drivers/staging/lustre drivers/mtd ipc mm include/linux; done|sort|uniq|grep -v '^fs/namespace.c$')

	sed -i -e 's/\/SB_RDONLY/g' \
	        -e 's/\/SB_NOSUID/g' \
	        -e 's/\/SB_NODEV/g' \
	        -e 's/\/SB_NOEXEC/g' \
	        -e 's/\/SB_SYNCHRONOUS/g' \
	        -e 's/\/SB_MANDLOCK/g' \
	        -e 's/\/SB_DIRSYNC/g' \
	        -e 's/\/SB_NOATIME/g' \
	        -e 's/\/SB_NODIRATIME/g' \
	        -e 's/\/SB_SILENT/g' \
	        -e 's/\/SB_POSIXACL/g' \
	        -e 's/\/SB_KERNMOUNT/g' \
	        -e 's/\/SB_I_VERSION/g' \
	        -e 's/\/SB_LAZYTIME/g' \
	        $list

  and commit it with something along the lines of 'convert filesystems
  away from use of MS_... constants' as commit message, it would save a
  quite a bit of headache next cycle"

* 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  VFS: Differentiate mount flags (MS_*) from internal superblock flags
  VFS: Convert sb->s_flags & MS_RDONLY to sb_rdonly(sb)
  vfs: Add sb_rdonly(sb) to query the MS_RDONLY flag on s_flags

ocfs2: clean up some dead code

2017-09-07T00:27:24+00:00

clean up some unused functions and parameters.

Link: http://lkml.kernel.org/r/598A5E21.2080807@huawei.com
Signed-off-by: Jun Piao 
Reviewed-by: Alex Chen 
Cc: Mark Fasheh 
Cc: Joel Becker 
Cc: Junxiao Bi 
Cc: Joseph Qi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

VFS: Convert sb->s_flags & MS_RDONLY to sb_rdonly(sb)

2017-07-17T07:45:34+00:00

Firstly by applying the following with coccinelle's spatch:

	@@ expression SB; @@
	-SB->s_flags & MS_RDONLY
	+sb_rdonly(SB)

to effect the conversion to sb_rdonly(sb), then by applying:

	@@ expression A, SB; @@
	(
	-(!sb_rdonly(SB)) && A
	+!sb_rdonly(SB) && A
	|
	-A != (sb_rdonly(SB))
	+A != sb_rdonly(SB)
	|
	-A == (sb_rdonly(SB))
	+A == sb_rdonly(SB)
	|
	-!(sb_rdonly(SB))
	+!sb_rdonly(SB)
	|
	-A && (sb_rdonly(SB))
	+A && sb_rdonly(SB)
	|
	-A || (sb_rdonly(SB))
	+A || sb_rdonly(SB)
	|
	-(sb_rdonly(SB)) != A
	+sb_rdonly(SB) != A
	|
	-(sb_rdonly(SB)) == A
	+sb_rdonly(SB) == A
	|
	-(sb_rdonly(SB)) && A
	+sb_rdonly(SB) && A
	|
	-(sb_rdonly(SB)) || A
	+sb_rdonly(SB) || A
	)

	@@ expression A, B, SB; @@
	(
	-(sb_rdonly(SB)) ? 1 : 0
	+sb_rdonly(SB)
	|
	-(sb_rdonly(SB)) ? A : B
	+sb_rdonly(SB) ? A : B
	)

to remove left over excess bracketage and finally by applying:

	@@ expression A, SB; @@
	(
	-(A & MS_RDONLY) != sb_rdonly(SB)
	+(bool)(A & MS_RDONLY) != sb_rdonly(SB)
	|
	-(A & MS_RDONLY) == sb_rdonly(SB)
	+(bool)(A & MS_RDONLY) == sb_rdonly(SB)
	)

to make comparisons against the result of sb_rdonly() (which is a bool)
work correctly.

Signed-off-by: David Howells