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109f556519
linux/fs/ext4
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Mingming 109f556519 ext4: fix ext4_ext_direct_IO()'s return value after converting uninit extents 
After a direct I/O request covering an uninitalized extent (i.e.,
created using the fallocate system call) or a hole in a file, ext4
will convert the uninitialized extent so it is marked as initialized
by calling ext4_convert_unwritten_extents().  This function returns
zero on success.

This return value was getting returned by ext4_direct_IO(); however
the file system's direct_IO function is supposed to return the number
of bytes read or written on a success.  By returning zero, it confused
the direct I/O code into falling back to buffered I/O unnecessarily.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-11-10 10:48:08 -05:00
..
acl.c ext[234]: move over to 'check_acl' permission model 2009-09-08 11:09:04 -07:00
acl.h ext[234]: move over to 'check_acl' permission model 2009-09-08 11:09:04 -07:00
balloc.c ext4: open-code ext4_mb_update_group_info 2009-08-17 23:51:29 -04:00
bitmap.c ext4: Change unsigned long to unsigned int 2008-11-05 00:14:04 -05:00
block_validity.c ext4: Add a comprehensive block validity check to ext4_get_blocks() 2009-05-17 15:38:01 -04:00
dir.c ext4: Define a new set of flags for ext4_get_blocks() 2009-05-14 00:58:52 -04:00
ext4_extents.h ext4: Split uninitialized extents for direct I/O 2009-09-28 15:49:08 -04:00
ext4_jbd2.c ext4: Assure that metadata blocks are written during fsync in no journal mode 2009-09-12 13:41:55 -04:00
ext4_jbd2.h ext4: Handle nested ext4_journal_start/stop calls without a journal 2009-09-29 11:01:03 -04:00
ext4.h Revert "ext4: Remove journal_checksum mount option and enable it by default" 2009-11-02 10:15:27 -08:00
extents.c ext4: fix ext4_ext_direct_IO()'s return value after converting uninit extents 2009-11-10 10:48:08 -05:00
file.c const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
fsync.c ext4: async direct IO for holes and fallocate support 2009-09-28 15:48:29 -04:00
hash.c ext4: Add support for non-native signed/unsigned htree hash algorithms 2008-10-28 13:21:44 -04:00
ialloc.c ext4: fix build warning when EXT4FS_DEBUG is on 2009-07-27 21:44:40 -04:00
inode.c ext4: fix ext4_ext_direct_IO()'s return value after converting uninit extents 2009-11-10 10:48:08 -05:00
ioctl.c ext4: Return exchanged blocks count to user space in failure 2009-09-05 22:46:29 -04:00
Kconfig ext4: drop ext4dev compat 2009-10-01 02:21:07 -04:00
Makefile ext4: online defrag -- Add EXT4_IOC_MOVE_EXT ioctl 2009-06-17 19:24:03 -04:00
mballoc.c ext4: Use tracepoints for mb_history trace file 2009-09-30 00:32:42 -04:00
mballoc.h ext4: Use tracepoints for mb_history trace file 2009-09-30 00:32:42 -04:00
migrate.c ext4: Split uninitialized extents for direct I/O 2009-09-28 15:49:08 -04:00
move_extent.c ext4: EXT4_IOC_MOVE_EXT: Check for different original and donor inodes first 2009-09-28 15:58:29 -04:00
namei.c ext4: Handle nested ext4_journal_start/stop calls without a journal 2009-09-29 11:01:03 -04:00
resize.c ext4: Clarify the locking details in mballoc 2009-09-09 23:50:17 -04:00
super.c Revert "ext4: Remove journal_checksum mount option and enable it by default" 2009-11-02 10:15:27 -08:00
symlink.c ext4: Rename ext4dev to ext4 2008-10-10 20:02:48 -04:00
xattr_security.c
xattr_trusted.c
xattr_user.c
xattr.c ext4: limit block allocations for indirect-block files to < 2^32 2009-09-16 14:45:10 -04:00
xattr.h ext4: Rename ext4dev to ext4 2008-10-10 20:02:48 -04:00