Christoph Hellwig 5fe878ae7f direct-io: cleanup blockdev_direct_IO locking ... Currently the locking in blockdev_direct_IO is a mess, we have three different locking types and very confusing checks for some of them. The most complicated one is DIO_OWN_LOCKING for reads, which happens to not actually be used. This patch gets rid of the DIO_OWN_LOCKING - as mentioned above the read case is unused anyway, and the write side is almost identical to DIO_NO_LOCKING. The difference is that DIO_NO_LOCKING always sets the create argument for the get_blocks callback to zero, but we can easily move that to the actual get_blocks callbacks. There are four users of the DIO_NO_LOCKING mode: gfs already ignores the create argument and thus is fine with the new version, ocfs2 only errors out if create were ever set, and we can remove this dead code now, the block device code only ever uses create for an error message if we are fully beyond the device which can never happen, and last but not least XFS will need the new behavour for writes. Now we can replace the lock_type variable with a flags one, where no flag means the DIO_NO_LOCKING behaviour and DIO_LOCKING is kept as the first flag. Separate out the check for not allowing to fill holes into a separate flag, although for now both flags always get set at the same time. Also revamp the documentation of the locking scheme to actually make sense. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Zach Brown <zach.brown@oracle.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Alex Elder <aelder@sgi.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <joel.becker@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-12-16 07:20:13 -08:00
..
9p	9p: fix build breakage introduced by FS-Cache	2009-12-01 07:35:11 -08:00
adfs	adfs: remove redundant test on unsigned	2009-09-24 07:21:05 -07:00
affs
afs	afs: remove manual O_SYNC handling	2009-12-10 15:02:50 +01:00
autofs	trivial: remove unnecessary semicolons	2009-09-21 15:14:58 +02:00
autofs4	autofs4: always use lookup for lookup	2009-12-16 07:19:58 -08:00
befs	fs: Make unload_nls() NULL pointer safe	2009-09-24 07:47:42 -04:00
bfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
btrfs	task_struct: make journal_info conditional	2009-12-15 08:53:27 -08:00
cachefiles	tree-wide: convert open calls to remove spaces to skip_spaces() lib function	2009-12-15 08:53:32 -08:00
cifs	vfs: Implement proper O_SYNC semantics	2009-12-10 15:02:50 +01:00
coda	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
configfs	writeback: add name to backing_dev_info	2009-09-11 09:20:26 +02:00
cramfs
debugfs	debugfs: fix create mutex racy fops and private data	2009-12-11 11:24:53 -08:00
devpts	devpts_get_tty() should validate inode	2009-12-11 15:18:05 -08:00
dlm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm	2009-12-10 09:33:59 -08:00
ecryptfs	ima: ecryptfs fix imbalance message	2009-10-08 11:31:38 -05:00
efs	get rid of BKL in fs/efs	2009-06-17 00:36:36 -04:00
exofs	exofs: Multi-device mirror support	2009-12-10 09:59:23 +02:00
exportfs
ext2	ext2: report metadata errors during fsync	2009-12-16 07:20:06 -08:00
ext3	ext3: PTR_ERR return of wrong pointer in setup_new_group_blocks()	2009-12-10 15:02:55 +01:00
ext4	tree-wide: convert open calls to remove spaces to skip_spaces() lib function	2009-12-15 08:53:32 -08:00
fat	fatfs: use common time_to_tm in fat_time_unix2fat()	2009-12-16 07:20:06 -08:00
freevxfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
fscache	FS-Cache: Avoid maybe-used-uninitialised warning on variable	2009-12-16 07:20:13 -08:00
fuse	fuse: reject O_DIRECT flag also in fuse_create	2009-11-27 16:37:13 +01:00
gfs2	fs/gfs2/sys.c: use %pUB to print UUIDs	2009-12-15 08:53:33 -08:00
hfs	hfs: fix a potential buffer overflow	2009-12-15 08:53:10 -08:00
hfsplus	hfsplus: refuse to mount volumes larger than 2TB	2009-10-29 07:39:27 -07:00
hostfs	hostfs: set maximum filesize in superblock for proper LFS support	2009-06-30 18:56:03 -07:00
hpfs	hpfs: use bitmap_weight()	2009-12-16 07:20:06 -08:00
hppfs
hugetlbfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-09-24 08:32:11 -07:00
isofs	zisofs: Implement reading of compressed files when PAGE_CACHE_SIZE > compress block size	2009-12-10 15:02:49 +01:00
jbd	task_struct: make journal_info conditional	2009-12-15 08:53:27 -08:00
jbd2	task_struct: make journal_info conditional	2009-12-15 08:53:27 -08:00
jffs2	Merge branch 'for-next' into for-linus	2009-12-07 18:36:35 +01:00
jfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
lockd	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
minix	V3 minixfs: add missing directory type checking	2009-09-23 07:39:57 -07:00
ncpfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
nfs	Merge git://git.linux-nfs.org/projects/trondmy/nfs-2.6	2009-12-14 10:00:24 -08:00
nfs_common
nfsd	Fix memory corruption caused by nfsd readdir+	2009-11-14 12:55:55 -08:00
nilfs2	task_struct: make journal_info conditional	2009-12-15 08:53:27 -08:00
nls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6	2009-09-30 09:31:14 -07:00
notify	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
ntfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
ocfs2	direct-io: cleanup blockdev_direct_IO locking	2009-12-16 07:20:13 -08:00
omfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
openpromfs
partitions	partitions: read whole sector with EFI GPT header	2009-11-23 09:29:58 +01:00
proc	elf: kill USE_ELF_CORE_DUMP	2009-12-16 07:20:12 -08:00
qnx4	qnx4fs: add missing KERN_xxx to printk() calls	2009-11-09 09:40:57 +01:00
quota	quota: Implement quota format with 64-bit space and inode limits	2009-12-10 15:02:54 +01:00
ramfs	truncate: use new helpers	2009-09-24 08:41:47 -04:00
reiserfs	reiserfs: don't compile procfs.o at all if no support	2009-12-16 07:20:06 -08:00
romfs	ROMFS: fix length used with romfs_dev_strnlen() function	2009-10-11 11:33:56 -07:00
smbfs	fs: Make unload_nls() NULL pointer safe	2009-09-24 07:47:42 -04:00
squashfs	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
sysfs	sysfs: sysfs_setattr remove unnecessary permission check.	2009-12-11 11:24:54 -08:00
sysv	get rid of BKL in fs/sysv	2009-06-17 00:36:37 -04:00
ubifs	fs/ubifs: use %pUB to print UUIDs	2009-12-15 08:53:33 -08:00
udf	udf: Avoid IO in udf_clear_inode	2009-12-14 21:40:04 +01:00
ufs	ufs: NFS support	2009-12-16 07:20:06 -08:00
xfs	direct-io: cleanup blockdev_direct_IO locking	2009-12-16 07:20:13 -08:00
aio.c	aio: remove unused field	2009-12-16 07:20:13 -08:00
anon_inodes.c	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
attr.c	truncate: new helpers	2009-09-24 08:41:47 -04:00
bad_inode.c
binfmt_aout.c
binfmt_elf.c	elf: kill USE_ELF_CORE_DUMP	2009-12-16 07:20:12 -08:00
binfmt_elf_fdpic.c	elf: kill USE_ELF_CORE_DUMP	2009-12-16 07:20:12 -08:00
binfmt_em86.c
binfmt_flat.c	flat: use IS_ERR_VALUE() helper macro	2009-09-24 07:21:03 -07:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c	block: Create bip slabs with embedded integrity vectors	2009-07-01 10:56:25 +02:00
bio.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-12-09 19:43:33 -08:00
block_dev.c	Merge branch 'for-linus' into for-2.6.33	2009-11-03 21:14:39 +01:00
buffer.c	Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block	2009-09-25 09:27:30 -07:00
char_dev.c	fs/char_dev.c: remove useless loop	2009-09-24 07:21:03 -07:00
compat.c	x86, fs: Fix x86 procfs stack information for threads on 64-bit	2009-11-04 13:25:03 +01:00
compat_binfmt_elf.c
compat_ioctl.c	md: move compat_ioctl handling into md.c	2009-12-14 12:51:41 +11:00
dcache.c	sched: Pull up the might_sleep() check into cond_resched()	2009-07-18 15:51:44 +02:00
dcookies.c
direct-io.c	direct-io: cleanup blockdev_direct_IO locking	2009-12-16 07:20:13 -08:00
drop_caches.c	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
eventfd.c	anonfd: split interface into file creation and install	2009-09-23 07:39:29 -07:00
eventpoll.c	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
exec.c	procfs: allow threads to rename siblings via /proc/pid/tasks/tid/comm	2009-12-15 08:53:24 -08:00
fcntl.c	fcntl: rename F_OWNER_GID to F_OWNER_PGRP	2009-11-17 17:40:33 -08:00
fifo.c
file.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
file_table.c	LSM: imbed ima calls in the security hooks	2009-10-25 12:22:48 +08:00
filesystems.c
fs-writeback.c	writeback: remove unused nonblocking and congestion checks	2009-12-03 13:54:25 +01:00
fs_struct.c
generic_acl.c
inode.c	LSM: imbed ima calls in the security hooks	2009-10-25 12:22:48 +08:00
internal.h	fs: fix overflow in sys_mount() for in-kernel calls	2009-09-24 08:40:15 -04:00
ioctl.c	__generic_block_fiemap(): fix for files bigger than 4GB	2009-11-12 07:26:01 -08:00
ioprio.c
Kconfig	task_struct: make journal_info conditional	2009-12-15 08:53:27 -08:00
Kconfig.binfmt
libfs.c	libfs: return error code on failed attr set	2009-09-24 07:47:30 -04:00
locks.c	const: make lock_manager_operations const	2009-09-22 07:17:25 -07:00
Makefile
mbcache.c
mpage.c
namei.c	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6	2009-12-11 15:31:13 -08:00
namespace.c	LSM: Pass original mount flags to security_sb_mount().	2009-10-12 10:56:03 +11:00
nfsctl.c
no-block.c
open.c	LSM: Move security_path_chmod()/security_path_chown() to after mutex_lock().	2009-11-24 08:49:26 +11:00
pipe.c	fs: pipe.c null pointer dereference	2009-10-22 08:11:44 +09:00
pnode.c
pnode.h
posix_acl.c
read_write.c	sendfile(): check f_op.splice_write() rather than f_op.sendpage()	2009-11-04 09:09:52 +01:00
read_write.h
readdir.c
select.c	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
seq_file.c	vfs: seq_file: add helpers for data filling	2009-09-24 07:47:35 -04:00
signalfd.c
splice.c	sendfile(): check f_op.splice_write() rather than f_op.sendpage()	2009-11-04 09:09:52 +01:00
stack.c
stat.c
super.c	freeze_bdev: grab active reference to frozen superblocks	2009-09-24 07:47:41 -04:00
sync.c	kill wait_on_page_writeback_range	2009-12-10 15:02:50 +01:00
timerfd.c
utimes.c
xattr.c	VFS: Factor out part of vfs_setxattr so it can be called from the SELinux hook for inode_setsecctx.	2009-09-10 10:11:22 +10:00
xattr_acl.c	VFS: Use GFP_NOFS in posix_acl_from_xattr()	2009-12-03 11:48:07 +00:00