linux-stable.git/fs/fat/dir.c, branch linux-4.3.y

fat: fix fake_offset handling on error path

2016-02-19T22:28:24+00:00

commit 928a477102c4fc6739883415b66987207e3502f4 upstream.

For the root directory, .  and ..  are faked (using dir_emit_dots()) and
ctx->pos is reset from 2 to 0.

A corrupted root directory could cause fat_get_entry() to fail, but
->iterate() (fat_readdir()) reports progress to the VFS (with ctx->pos
rewound to 0), so any following calls to ->iterate() continue to return
the same entries again and again.

The result is that userspace will never see the end of the directory,
causing e.g.  'ls' to hang in a getdents() loop.

[hirofumi@mail.parknet.co.jp: cleanup and make sure to correct fake_offset]
Reported-by: Vegard Nossum 
Tested-by: Vegard Nossum 
Signed-off-by: Richard Weinberger 
Signed-off-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

fs/fat: remove unnecessary includes

2015-04-17T13:04:06+00:00

'fat.h' includes  which includes  which
includes all the header files required for all *.c files fat filesystem.

[akpm@linux-foundation.org: fs/fat/iode.c needs seq_file.h]
[sfr@canb.auug.org.au: put one actually necessary include file back]
Signed-off-by: Alexander Kuleshov 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Stephen Rothwell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

vfs: make first argument of dir_context.actor typed

2014-10-31T21:48:54+00:00

Signed-off-by: Miklos Szeredi 
Signed-off-by: Al Viro

[readdir] convert fatfs

2013-06-29T08:57:01+00:00

... pox upon the idiotic ioctls; life would be much easier without
those.

Signed-off-by: Al Viro

fat (exportfs): rebuild directory-inode if fat_dget()

2013-04-30T01:28:41+00:00

This patch enables rebuilding of directory inodes which are not present in
the cache.This is done by traversing the disk clusters to find the
directory entry of the parent directory and using its i_pos to build the
inode.

The traversal is done by fat_scan_logstart() which is similar to
fat_scan() but matches i_pos values instead of names.fat_scan_logstart()
needs an inode parameter to work, for which a dummy inode is created by
it's caller fat_rebuild_parent().  This dummy inode is destroyed after the
traversal completes.

All this is done  only if the nostale_ro nfs mount option is specified.

Signed-off-by: Namjae Jeon 
Signed-off-by: Ravishankar N 
Signed-off-by: Amit Sahrawat 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

new helper: file_inode(file)

2013-02-23T04:31:31+00:00

Signed-off-by: Al Viro

fat: fix incorrect function comment

2012-12-21T01:40:20+00:00

fat_search_long() returns 0 on success, -ENOENT/ENOMEM on failure.
Change the function comment accordingly.

While at it, fix some trivial typos.

Signed-off-by: Ravishankar N 
Signed-off-by: Namjae Jeon 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: drop lock/unlock super

2012-10-10T03:33:38+00:00

Removed lock/unlock super. Added a new private s_lock mutex.

Signed-off-by: Marco Stornelli 
Signed-off-by: Al Viro

fs/fat: fix all other checkpatch issues in dir.c

2012-10-05T18:05:11+00:00

1: Import linux/uaccess.h instead of asm.uaccess.h
2: Stop any lines going over 80 characters
3: Stopped setting any variables in if statements
4: Stopped splitting quoted strings
5: Removed unneeded parentheses

Signed-off-by: Cruz Julian Bishop 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs/fat: fix some small checkpatch issues in dir.c

2012-10-05T18:05:11+00:00

Simply remove the spacing between function definitions and
EXPORT_SYMBOL_GPL calls, which were previously generating warnings.

Signed-off-by: Cruz Julian Bishop 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds