Dmitry Monakhov 1c9114f9c0 ext4: serialize unlocked dio reads with truncate ... Current serialization will works only for DIO which holds i_mutex, but nonlocked DIO following race is possible: dio_nolock_read_task truncate_task ->ext4_setattr() ->inode_dio_wait() ->ext4_ext_direct_IO ->ext4_ind_direct_IO ->__blockdev_direct_IO ->ext4_get_block ->truncate_setsize() ->ext4_truncate() #alloc truncated blocks #to other inode ->submit_io() #INFORMATION LEAK In order to serialize with unlocked DIO reads we have to rearrange wait sequence 1) update i_size first 2) if i_size about to be reduced wait for outstanding DIO requests 3) and only after that truncate inode blocks Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>		2012-09-29 00:55:23 -04:00
..
acl.c	switch posix_acl_equiv_mode() to umode_t *	2011-08-01 02:10:06 -04:00
acl.h	fs: take the ACL checks to common code	2011-07-25 14:30:23 -04:00
balloc.c	ext4: don't call ext4_error while block group is locked	2012-08-17 09:06:06 -04:00
bitmap.c	ext4: don't call ext4_error while block group is locked	2012-08-17 09:06:06 -04:00
block_validity.c	ext2/3/4: delete unneeded includes of module.h	2012-01-09 13:52:10 +01:00
dir.c	ext4: use core vfs llseek code for dir seeks	2012-07-23 00:00:28 +04:00
ext4_extents.h	ext4: verify and calculate checksums for extent tree blocks	2012-04-29 18:37:10 -04:00
ext4_jbd2.c	ext4: remove unnecessary argument from __ext4_handle_dirty_metadata()	2012-07-22 20:37:31 -04:00
ext4_jbd2.h	ext4: remove unnecessary argument from __ext4_handle_dirty_metadata()	2012-07-22 20:37:31 -04:00
ext4.h	ext4: serialize dio nonlocked reads with defrag workers	2012-09-29 00:41:21 -04:00
extents.c	ext4: completed_io locking cleanup	2012-09-29 00:14:55 -04:00
file.c	ext4: give i_aiodio_unwritten a more appropriate name	2012-09-28 23:24:52 -04:00
fsync.c	ext4: completed_io locking cleanup	2012-09-29 00:14:55 -04:00
hash.c	ext4: return 32/64-bit dir name hash according to usage type	2012-03-18 22:44:40 -04:00
ialloc.c	ext4: check free inode count before allocating an inode	2012-09-23 23:16:03 -04:00
indirect.c	ext4: serialize dio nonlocked reads with defrag workers	2012-09-29 00:41:21 -04:00
inode.c	ext4: serialize unlocked dio reads with truncate	2012-09-29 00:55:23 -04:00
ioctl.c	ext4: release donor reference when EXT4_IOC_MOVE_EXT ioctl fails	2012-09-26 22:58:50 -04:00
Kconfig	ext4: load the crc32c driver if necessary	2012-04-29 18:27:10 -04:00
Makefile	ext4: move ext4_ind_* functions from inode.c to indirect.c	2011-06-27 19:40:50 -04:00
mballoc.c	ext4: enable FITRIM ioctl on bigalloc file system	2012-09-26 22:21:21 -04:00
mballoc.h	ext4: remove unused macro MB_DEFAULT_MAX_GROUPS_TO_SCAN	2012-08-17 10:00:17 -04:00
migrate.c	userns: Convert ext4 to user kuid/kgid where appropriate	2012-05-15 14:59:27 -07:00
mmp.c	ext4: Convert to new freezing mechanism	2012-07-31 09:45:48 +04:00
move_extent.c	ext4: serialize dio nonlocked reads with defrag workers	2012-09-29 00:41:21 -04:00
namei.c	ext4: ext4_bread usage audit	2012-09-27 09:31:33 -04:00
page-io.c	ext4: completed_io locking cleanup	2012-09-29 00:14:55 -04:00
resize.c	ext4: don't call update_backups() multiple times for the same bg	2012-09-26 00:08:57 -04:00
super.c	ext4: give i_aiodio_unwritten a more appropriate name	2012-09-28 23:24:52 -04:00
symlink.c	ext4: symlink must be handled via filesystem specific operation	2010-05-16 02:00:00 -04:00
truncate.h	ext4: move common truncate functions to header file	2011-06-27 19:16:04 -04:00
xattr_security.c	Merge branch 'for_linus' into for_linus_merged	2012-01-10 11:54:07 -05:00
xattr_trusted.c	ext2/3/4: delete unneeded includes of module.h	2012-01-09 13:52:10 +01:00
xattr_user.c	ext2/3/4: delete unneeded includes of module.h	2012-01-09 13:52:10 +01:00
xattr.c	ext4: use s_csum_seed instead of i_csum_seed for xattr block	2012-07-09 16:29:27 -04:00
xattr.h	ext4: change on-disk layout to support extended metadata checksumming	2012-04-29 18:23:10 -04:00