linux-toradex.git/fs/hpfs, branch v4.4.94

hpfs: implement the show_options method

2016-06-01T19:15:54+00:00

commit 037369b872940cd923835a0a589763180c4a36bc upstream.

The HPFS filesystem used generic_show_options to produce string that is
displayed in /proc/mounts.  However, there is a problem that the options
may disappear after remount.  If we mount the filesystem with option1
and then remount it with option2, /proc/mounts should show both option1
and option2, however it only shows option2 because the whole option
string is replaced with replace_mount_options in hpfs_remount_fs.

To fix this bug, implement the hpfs_show_options function that prints
options that are currently selected.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

hpfs: fix remount failure when there are no options changed

2016-06-01T19:15:54+00:00

commit 44d51706b4685f965cd32acde3fe0fcc1e6198e8 upstream.

Commit ce657611baf9 ("hpfs: kstrdup() out of memory handling") checks if
the kstrdup function returns NULL due to out-of-memory condition.

However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL.  In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists.  The mount syscall then fails with
ENOMEM.

This patch fixes the bug.  We fail with ENOMEM only if data is non-NULL.

The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).

Fixes: ce657611baf9 ("hpfs: kstrdup() out of memory handling")
Signed-off-by: Mikulas Patocka 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

hpfs: don't truncate the file when delete fails

2016-03-03T23:07:30+00:00

commit b6853f78e763d42c7a158d8de3549c9827c604ab upstream.

The delete opration can allocate additional space on the HPFS filesystem
due to btree split. The HPFS driver checks in advance if there is
available space, so that it won't corrupt the btree if we run out of space
during splitting.

If there is not enough available space, the HPFS driver attempted to
truncate the file, but this results in a deadlock since the commit
7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7 ("HPFS: Introduce a global mutex
and lock it on every callback from VFS").

This patch removes the code that tries to truncate the file and -ENOSPC is
returned instead. If the user hits -ENOSPC on delete, he should try to
delete other files (that are stored in a leaf btree node), so that the
delete operation will make some space for deleting the file stored in
non-leaf btree node.

Reported-by: Al Viro 
Signed-off-by: Mikulas Patocka 
Signed-off-by: Al Viro 
Signed-off-by: Greg Kroah-Hartman

fs/hpfs/namei.c: remove unnecessary new_valid_dev() check

2015-11-09T23:11:24+00:00

new_valid_dev() always returns 1, so the !new_valid_dev() check is not
needed.  Remove it.

Signed-off-by: Yaowei Bai 
Cc: Alexander Viro 
Cc: Mikulas Patocka 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hpfs: update ctime and mtime on directory modification

2015-09-03T18:55:30+00:00

Update ctime and mtime when a directory is modified. (though OS/2 doesn't
update them anyway)

Signed-off-by: Mikulas Patocka 
Cc: stable@kernel.org	# v3.3+
Signed-off-by: Linus Torvalds

hpfs: support hotfixes

2015-09-03T18:55:30+00:00

When the OS/2 driver hits a disk write error, it writes the sector to
another location and adds the sector mapping to the hotfix map.

This patch makes the hpfs driver understand the hotfix map and remap
accesses accoring to it.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Linus Torvalds

hpfs: hpfs_error: Remove static buffer, use vsprintf extension %pV instead

2015-07-09T20:35:31+00:00

Removing unnecessary static buffers is good.
Use the vsprintf %pV extension instead.

Signed-off-by: Joe Perches 
Signed-off-by: Mikulas Patocka 
Cc: stable@vger.kernel.org      # v2.6.36+
Signed-off-by: Linus Torvalds

hpfs: kstrdup() out of memory handling

2015-07-09T20:35:31+00:00

There is a possibility of nothing being allocated to the new_opts in
case of memory pressure, therefore return ENOMEM for such case.

Signed-off-by: Sanidhya Kashyap 
Signed-off-by: Mikulas Patocka 
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds

hpfs: Remove unessary cast

2015-07-09T20:35:31+00:00

Avoid a pointless kmem_cache_alloc() return value cast in
fs/hpfs/super.c::hpfs_alloc_inode()

Signed-off-by: Firo Yang 
Signed-off-by: Mikulas Patocka 
Signed-off-by: Linus Torvalds

hpfs: add fstrim support

2015-07-09T20:35:30+00:00

This patch adds support for fstrim to the HPFS filesystem.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Linus Torvalds