linux.git/fs/fat/dir.c, branch v4.20

fat: change timestamp updates to use fat_truncate_time

2018-10-31T15:54:14+00:00

Convert the inode timestamp updates to use fat_truncate_time.

Link: http://lkml.kernel.org/r/2663d3083c4dd62f00b64612c8eaf5542bb05a4c.1538363961.git.sorenson@redhat.com
Signed-off-by: Frank Sorenson 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: expand a slightly out-of-date comment

2018-10-31T15:54:14+00:00

The file namei.c seems to have been renamed to namei_msdos.c, so I decided
to update the comment with the correct name, and expand it a bit to tell
the reader what to look for.

Link: http://lkml.kernel.org/r/20180928194947.23932-1-mihir@cs.utexas.edu
Signed-off-by: Mihir Mehta 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: propagate 64-bit inode timestamps

2018-08-22T17:52:50+00:00

Now that we pass down 64-bit timestamps from VFS, we just need to convert
that correctly into on-disk timestamps.  To make that work correctly, this
changes the last use of time_to_tm() in the kernel to time64_to_tm(),
which also lets use remove that deprecated interfaces.

Similarly, the time_t use in fat_time_fat2unix() truncates the timestamp
on the way in, which can be avoided by using types that are wide enough to
hold the intermediate values during the conversion.

[hirofumi@mail.parknet.co.jp: remove useless temporary variable, needless long long]
Link: http://lkml.kernel.org/r/20180619153646.3637529-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann 
Acked-by: OGAWA Hirofumi 
Cc: Jeff Layton 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: convert to new i_version API

2018-01-29T11:42:20+00:00

Signed-off-by: Jeff Layton

fat: remove redundant assignment of 0 to slots

2017-11-18T00:10:03+00:00

The variable slots is being assigned a value of zero that is never read,
slots is being updated again a few lines later.  Remove this redundant
assignment.

Cleans clang warning: Value stored to 'slots' is never read

Link: http://lkml.kernel.org/r/20171017140258.22536-1-colin.king@canonical.com
Signed-off-by: Colin Ian King 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps

2016-09-28T01:06:22+00:00

CURRENT_TIME_SEC is not y2038 safe. current_time() will
be transitioned to use 64 bit time along with vfs in a
separate patch.
There is no plan to transistion CURRENT_TIME_SEC to use
y2038 safe time interfaces.

current_time() will also be extended to use superblock
range checking parameters when range checking is introduced.

This works because alloc_super() fills in the the s_time_gran
in super block to NSEC_PER_SEC.

Signed-off-by: Deepa Dinamani 
Acked-by: Jan Kara 
Signed-off-by: Al Viro

fat: switch to ->iterate_shared()

2016-05-09T15:41:15+00:00

... and make that weird ioctl lock directory only shared.

Signed-off-by: Al Viro

wrappers for ->i_mutex access

2016-01-22T23:04:28+00:00

parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro

fat: permit to return phy block number by fibmap in fallocated region

2016-01-21T01:09:18+00:00

Make the fibmap call return the proper physical block number for any
offset request in the fallocated range.

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat 
Cc: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: fix fake_offset handling on error path

2015-11-21T00:17:32+00:00

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 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds