Namjae Jeon c0ef0cc9d2 fat: fix data past EOF resulting from fsx testsuite ... When running FSX with direct I/O mode, fsx resulted in DATA past EOF issues. fsx ./file2 -Z -r 4096 -w 4096 ... .. truncating to largest ever: 0x907c fallocating to largest ever: 0x11137 truncating to largest ever: 0x2c6fe truncating to largest ever: 0x2cfdf fallocating to largest ever: 0x40000 Mapped Read: non-zero data past EOF (0x18628) page offset 0x629 is 0x2a4e ... .. The reason being, it is doing a truncate down, but the zeroing does not happen on the last block boundary when offset is not aligned. Even though it calls truncate_setsize()->truncate_inode_pages()-> truncate_inode_pages_range() and considers the partial zeroout but it retrieves the page using find_lock_page() - which only looks the page in the cache. So, zeroing out does not happen in case of direct IO. Make a truncate page based around block_truncate_page for FAT filesystem and invoke that helper to zerout in case the offset is not aligned with the blocksize. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-12-13 12:42:51 -08:00
..
cache.c	fs/fat: fix two checkpatch issues in cache.c	2012-10-06 03:05:10 +09:00
dir.c	vfs: make first argument of dir_context.actor typed	2014-10-31 17:48:54 -04:00
fat.h	fat: fix data past EOF resulting from fsx testsuite	2014-12-13 12:42:51 -08:00
fatent.c	fat: no need to reset EOF in ent_put for FAT32	2012-10-06 03:05:12 +09:00
file.c	fat: fix data past EOF resulting from fsx testsuite	2014-12-13 12:42:51 -08:00
inode.c	fat: fix data past EOF resulting from fsx testsuite	2014-12-13 12:42:51 -08:00
Kconfig
Makefile	fat (exportfs): move NFS support code	2012-10-06 03:05:09 +09:00
misc.c	fat: remove redundant sys_tz declaration	2014-10-14 02:18:20 +02:00
namei_msdos.c	Don't pass inode to ->d_hash() and ->d_compare()	2013-06-29 12:57:36 +04:00
namei_vfat.c	fat: fix oops on corrupted vfat fs	2014-12-03 09:36:03 -08:00
nfs.c	fat (exportfs): rebuild directory-inode if fat_dget()	2013-04-29 18:28:41 -07:00