linux-toradex.git/fs/hpfs, branch v3.11.4

Merge branch 'hpfs' from Mikulas Patocka

2013-07-04T18:22:55+00:00

Merge hpfs patches from Mikulas Patocka.

* emailed patches from Mikulas Patocka :
  hpfs: implement prefetch to improve performance
  hpfs: use mpage
  hpfs: better test for errors

hpfs: implement prefetch to improve performance

2013-07-04T18:22:46+00:00

This patch implements prefetch to improve performance.  It helps mostly
when scanning the bitmaps to calculate free space.

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

hpfs: use mpage

2013-07-04T18:22:46+00:00

Use the mpage interface to improve performance.

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

hpfs: better test for errors

2013-07-04T18:22:46+00:00

The test if bitmap access is out of bound could errorneously pass if the
device size is divisible by 16384 sectors and we are asking for one bitmap
after the end.

Check for invalid size in the superblock. Invalid size could cause integer
overflows in the rest of the code.

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

Don't pass inode to ->d_hash() and ->d_compare()

2013-06-29T08:57:36+00:00

Instances either don't look at it at all (the majority of cases) or
only want it to find the superblock (which can be had as dentry->d_sb).
A few cases that want more are actually safe with dentry->d_inode -
the only precaution needed is the check that it hadn't been replaced with
NULL by rmdir() or by overwriting rename(), which case should be simply
treated as cache miss.

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

[readdir] convert hpfs

2013-06-29T08:56:51+00:00

Signed-off-by: Al Viro

hpfs: fix warnings when the filesystem fills up

2013-06-09T00:39:40+00:00

This patch fixes warnings due to missing lock on write error path.

  WARNING: at fs/hpfs/hpfs_fn.h:353 hpfs_truncate+0x75/0x80 [hpfs]()
  Hardware name: empty
  Pid: 26563, comm: dd Tainted: P           O 3.9.4 #12
  Call Trace:
    hpfs_truncate+0x75/0x80 [hpfs]
    hpfs_write_begin+0x84/0x90 [hpfs]
    _hpfs_bmap+0x10/0x10 [hpfs]
    generic_file_buffered_write+0x121/0x2c0
    __generic_file_aio_write+0x1c7/0x3f0
    generic_file_aio_write+0x7c/0x100
    do_sync_write+0x98/0xd0
    hpfs_file_write+0xd/0x50 [hpfs]
    vfs_write+0xa2/0x160
    sys_write+0x51/0xa0
    page_fault+0x22/0x30
    system_call_fastpath+0x1a/0x1f

Signed-off-by: Mikulas Patocka 
Cc: stable@kernel.org  # 2.6.39+
Signed-off-by: Linus Torvalds

hpfs: deadlock and race in directory lseek()

2013-05-31T19:17:43+00:00

For one thing, there's an ABBA deadlock on hpfs fs-wide lock and i_mutex
in hpfs_dir_lseek() - there's a lot of methods that grab the former with
the caller already holding the latter, so it must take i_mutex first.

For another, locking the damn thing, carefully validating the offset,
then dropping locks and assigning the offset is obviously racy.

Moreover, we _must_ do hpfs_add_pos(), or the machinery in dnode.c
won't modify the sucker on B-tree surgeries.

Signed-off-by: Al Viro

hpfs: move setting hpfs-private i_dirty to ->write_end()

2013-04-09T18:12:55+00:00

... so that writev(2) doesn't miss it.  Get rid of hpfs_file_write().

Signed-off-by: Al Viro

fs: Limit sys_mount to only request filesystem modules. (Part 3)

2013-03-11T14:09:48+00:00

Somehow I failed to add the MODULE_ALIAS_FS for cifs, hostfs, hpfs,
squashfs, and udf despite what I thought were my careful checks :(

Add them now.

Signed-off-by: "Eric W. Biederman"