Aneesh Kumar K.V 29fa89d088 ext4: Mark the unwritten buffer_head as mapped during write_begin ...

Setting BH_Unwritten buffer_heads as BH_Mapped avoids multiple
(unnecessary) calls to get_block() during the call to the write(2)
system call.  Setting BH_Unwritten buffer heads as BH_Mapped requires
that the writepages() functions can handle BH_Unwritten buffer_heads.

After this commit, things work as follows:

ext4_ext_get_block() returns unmapped, unwritten, buffer head when
called with create = 0 for prealloc space. This makes sure we handle
the read path and non-delayed allocation case correctly.  Even though
the buffer head is marked unmapped we have valid b_blocknr and b_bdev
values in the buffer_head.

ext4_da_get_block_prep() called for block resrevation will now return
mapped, unwritten, new buffer_head for prealloc space. This avoids
multiple calls to get_block() for write to same offset. By making such
buffers as BH_New, we also assure that sub-block zeroing of buffered
writes happens correctly.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2009-05-12 16:30:27 -04:00

..

9p

Fix a leak in failure exit in 9p ->get_sb()

2009-05-09 10:49:40 -04:00

adfs

fs/adfs: return f_fsid for statfs(2)

2009-04-02 19:05:08 -07:00

affs

Fix races around the access to ->s_options

2009-05-09 10:51:34 -04:00

afs

Fix races around the access to ->s_options

2009-05-09 10:51:34 -04:00

autofs

Fix autofs_expire()

2009-04-20 23:01:15 -04:00

autofs4

autofs4: fix incorrect return in autofs4_mount_busy()

2009-05-02 15:36:09 -07:00

befs

befs: fix build on parisc

2009-04-08 10:21:43 -07:00

bfs

fs/Kconfig: move bfs out

2009-01-22 13:15:57 +03:00

btrfs

Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

2009-05-14 19:18:44 -07:00

cachefiles

CacheFiles: Fixup renamed filenames in comments in internal.h

2009-05-27 10:20:13 -07:00

cifs

[CIFS] Avoid open on possible directories since Samba now rejects them

2009-05-23 18:57:25 +00:00

coda

constify dentry_operations: misc filesystems

2009-03-27 14:44:00 -04:00

configfs

configfs: Fix Trivial Warning in fs/configfs/symlink.c

2009-04-21 12:59:21 -07:00

cramfs

fs/cramfs: return f_fsid for statfs(2)

2009-04-02 19:05:08 -07:00

debugfs

debugfs: function to know if debugfs is initialized

2009-03-23 16:25:46 +01:00

devpts

devpts: correctly set default options

2009-05-15 08:03:23 -07:00

dlm

dlm: fix length calculation in compat code

2009-03-11 12:23:59 -05:00

ecryptfs

Convert obvious places to deactivate_locked_super()

2009-05-09 10:49:40 -04:00

efs

fs/efs: return f_fsid for statfs(2)

2009-04-02 19:05:09 -07:00

exofs

exofs: Documentation

2009-03-31 19:44:38 +03:00

exportfs

Merge branch 'next' into for-linus

2008-12-25 11:40:09 +11:00

ext2

ext2: missing unlock in ext2_quota_write()

2009-04-27 16:49:52 +02:00

ext3

ext3: Try to avoid starting a transaction in writepage for data=writepage

2009-04-08 13:15:10 -04:00

ext4

ext4: Mark the unwritten buffer_head as mapped during write_begin

2009-05-12 16:30:27 -04:00

fat

vfat: Note the NLS requirement

2009-04-17 09:32:11 -07:00

freevxfs

fs/Kconfig: move vxfs out

2009-01-22 13:15:58 +03:00

fscache

FS-Cache: Fixup renamed filenames in comments in internal.h

2009-05-27 10:20:13 -07:00

fuse

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

2009-05-13 16:32:57 -07:00

gfs2

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2009-05-10 10:49:08 -07:00

hfs

hfs: fix memory leak when unmounting

2009-04-13 15:04:29 -07:00

hfsplus

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2009-04-02 21:09:10 -07:00

hostfs

constify dentry_operations: misc filesystems

2009-03-27 14:44:00 -04:00

hpfs

Fix races around the access to ->s_options

2009-05-09 10:51:34 -04:00

hppfs

hppfs: hppfs_read_file() may return -ERROR

2009-04-02 19:04:53 -07:00

hugetlbfs

Remove implementation of readpage from the hugetlbfs_aops

2009-05-13 08:04:45 -07:00

isofs

fs/isofs: return f_fsid for statfs(2)

2009-04-02 19:05:09 -07:00

jbd

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2009-04-24 08:37:40 -07:00

jbd2

jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke records

2009-04-14 07:50:56 -04:00

jffs2

jffs2: Fix corruption when flash erase/write failure

2009-05-29 10:44:46 +01:00

jfs

New helper - current_umask()

2009-03-31 23:00:26 -04:00

lockd

lockd: fix list corruption on lockd restart

2009-05-06 17:19:36 -04:00

minix

fs/minix: return f_fsid for statfs(2)

2009-04-02 19:05:09 -07:00

ncpfs

ncpfs: use memdup_user()

2009-04-20 23:02:51 -04:00

nfs

NFSv4: Fix the case where NFSv4 renewal fails

2009-05-26 14:51:00 -04:00

nfs_common

SUNRPC: nfsacl_encode/nfsacl_decode should be exported as GPL-only

2008-12-23 15:21:32 -05:00

nfsd

nfsd: fix hung up of nfs client while sync write data to nfs server

2009-05-27 17:40:06 -04:00

nilfs2

nilfs2: fix bh leak in nilfs_cpfile_delete_checkpoints function

2009-05-30 22:07:50 +09:00

nls

…

notify

inotify: use GFP_NOFS in kernel_event() to work around a lockdep false-positive

2009-05-06 16:36:09 -07:00

ntfs

ntfs: remove private wrapper of endian helpers

2009-04-01 08:59:18 -07:00

ocfs2

ocfs2: Use nd_set_link().

2009-05-09 10:49:40 -04:00

omfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2009-04-02 21:09:10 -07:00

openpromfs

zero i_uid/i_gid on inode allocation

2009-01-05 11:54:28 -05:00

partitions

Merge branch 'tracing/core-v2' into tracing-for-linus

2009-04-02 00:49:02 +02:00

proc

procfs: make errno values consistent when open pident vs exit(2) race occurs

2009-05-29 08:40:02 -07:00

qnx4

fs/qnx4: return f_fsid for statfs(2)

2009-04-02 19:05:10 -07:00

quota

quota: remove obsolete comments in fs/quota/Makefile

2009-04-27 16:49:52 +02:00

ramfs

ramfs: fix double freeing s_fs_info on failed mount

2009-04-07 07:39:59 -07:00

reiserfs

reiserfs: fixup perms when xattrs are disabled

2009-05-17 11:45:45 -07:00

romfs

ROMFS: romfs_dev_read() error ignored

2009-05-09 10:49:41 -04:00

smbfs

constify dentry_operations: misc filesystems

2009-03-27 14:44:00 -04:00

squashfs

Squashfs: cody tidying, remove commented out line in Makefile

2009-05-13 03:25:20 +01:00

sysfs

sysfs: file.c: use create_singlethread_workqueue()

2009-05-28 14:24:07 -07:00

sysv

fs/sysv: return f_fsid for statfs(2)

2009-04-02 19:05:10 -07:00

ubifs

Convert obvious places to deactivate_locked_super()

2009-05-09 10:49:40 -04:00

udf

udf: Don't write integrity descriptor too often

2009-04-02 13:36:28 +02:00

ufs

switch ufs directories to ufs_sync_file()

2009-05-09 10:49:42 -04:00

xfs

Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

2009-06-02 09:47:21 -07:00

aio.c

aio: lookup_ioctx can return the wrong value when looking up a bogus context

2009-03-19 15:57:18 -07:00

anon_inodes.c

constify dentry_operations: rest

2009-03-27 14:44:03 -04:00

attr.c

vfs: Use lowercase names of quota functions

2009-03-26 02:18:35 +01:00

bad_inode.c

kill ->dir_notify()

2008-12-31 18:07:43 -05:00

binfmt_aout.c

sanitize ifdefs in binfmt_aout

2009-01-03 11:45:54 -08:00

binfmt_elf_fdpic.c

ptrace: s/parent/real_parent/ in binfmt_elf_fdpic.c

2009-05-02 15:36:10 -07:00

binfmt_elf.c

Trim includes in binfmt_elf

2009-03-31 23:00:27 -04:00

binfmt_em86.c

…

binfmt_flat.c

flat: fix data sections alignment

2009-05-29 08:40:02 -07:00

binfmt_misc.c

fs/binfmt_misc.c: add terminating newline to /proc/sys/fs/binfmt_misc/status

2009-01-06 15:59:19 -08:00

binfmt_script.c

…

binfmt_som.c

Don't crap into descriptor table in binfmt_som

2009-03-31 23:00:28 -04:00

bio-integrity.c

block: add private bio_set for bio integrity allocations

2009-03-24 12:35:17 +01:00

bio.c

bio: fix memcpy corruption in bio_copy_user_iov()

2009-04-28 20:24:29 +02:00

block_dev.c

Cleanup after commit 585d3bc06f

2009-04-01 07:07:16 -04:00

buffer.c

vfs: Add BUG_ON for delayed and unwritten flags in submit_bh()

2009-05-12 16:22:37 -04:00

char_dev.c

fs: fix name overwrite in __register_chrdev_region()

2009-01-06 15:59:13 -08:00

compat_binfmt_elf.c

…

compat_ioctl.c

fs/compat_ioctl: fix build when !BLOCK

2009-04-20 23:01:16 -04:00

compat.c

do_execve() must not clear fs->in_exec if it was set by another thread

2009-04-24 07:39:45 -07:00

dcache.c

fs: dcache fix LRU ordering

2009-05-09 10:49:40 -04:00

dcookies.c

[CVE-2009-0029] System call wrapper special cases

2009-01-14 14:15:18 +01:00

direct-io.c

dio: Remove code handling bio_alloc failure with __GFP_WAIT

2009-04-15 12:10:13 +02:00

drop_caches.c

vfs: skip I_CLEAR state inodes

2009-04-02 19:04:48 -07:00

eventfd.c

epoll keyed wakeups: make eventfd use keyed wakeups

2009-04-01 08:59:20 -07:00

eventpoll.c

epoll: fix size check in epoll_create()

2009-05-12 14:11:35 -07:00

exec.c

Switch open_exec() and sys_uselib() to do_open_filp()

2009-05-09 10:49:42 -04:00

fcntl.c

dup2: Fix return value with oldfd == newfd and invalid fd

2009-05-11 12:18:06 -07:00

fifo.c

…

file_table.c

trivial: remove unused variable 'path' in alloc_file()

2009-03-30 15:22:03 +02:00

file.c

…

filesystems.c

fs: Mark get_filesystem_list() as __init function.

2009-04-20 23:02:52 -04:00

fs_struct.c

Get rid of indirect include of fs_struct.h

2009-03-31 23:00:27 -04:00

fs-writeback.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2009-04-03 15:24:35 -07:00

generic_acl.c

New helper - current_umask()

2009-03-31 23:00:26 -04:00

inode.c

Make checkpatch.pl shut up on fs/inode.c

2009-05-09 10:49:41 -04:00

internal.h

New locking/refcounting for fs_struct

2009-03-31 23:00:26 -04:00

ioctl.c

fiemap: fix problem with setting FIEMAP_EXTENT_LAST

2009-05-06 16:36:09 -07:00

ioprio.c

[CVE-2009-0029] System call wrappers part 28

2009-01-14 14:15:30 +01:00

Kconfig

nilfs2: update makefile and Kconfig

2009-04-07 08:31:16 -07:00

Kconfig.binfmt

CORE_DUMP_DEFAULT_ELF_HEADERS depends on ELF_CORE

2009-01-09 16:54:41 -08:00

libfs.c

Convert obvious places to deactivate_locked_super()

2009-05-09 10:49:40 -04:00

locks.c

[CVE-2009-0029] System call wrappers part 16

2009-01-14 14:15:25 +01:00

Makefile

nilfs2: update makefile and Kconfig

2009-04-07 08:31:16 -07:00

mbcache.c

…

mpage.c

ext4: Properly initialize the buffer_head state

2009-05-13 15:13:42 -04:00

namei.c

Switch open_exec() and sys_uselib() to do_open_filp()

2009-05-09 10:49:42 -04:00

namespace.c

Fix races around the access to ->s_options

2009-05-09 10:51:34 -04:00

nfsctl.c

[CVE-2009-0029] System call wrappers part 27

2009-01-14 14:15:29 +01:00

no-block.c

…

open.c

Switch open_exec() and sys_uselib() to do_open_filp()

2009-05-09 10:49:42 -04:00

pipe.c

splice: add helpers for locking pipe inode

2009-04-15 12:10:12 +02:00

pnode.c

…

pnode.h

…

posix_acl.c

CRED: Wrap task credential accesses in the filesystem subsystem

2008-11-14 10:39:05 +11:00

read_write.c

Make non-compat preadv/pwritev use native register size

2009-04-04 14:20:34 -07:00

read_write.h

…

readdir.c

[CVE-2009-0029] System call wrappers part 32

2009-01-14 14:15:31 +01:00

select.c

[CVE-2009-0029] System call wrappers part 32

2009-01-14 14:15:31 +01:00

seq_file.c

cpumask: fix seq_bitmap_*() functions.

2009-03-30 22:05:11 +10:30

signalfd.c

[CVE-2009-0029] System call wrappers part 31

2009-01-14 14:15:31 +01:00

splice.c

splice: fix new kernel-doc warnings

2009-04-17 07:38:07 -07:00

stack.c

…

stat.c

kill vfs_stat_fd / vfs_lstat_fd

2009-04-20 23:02:52 -04:00

super.c

NULL noise in fs/super.c:kill_bdev_super()

2009-05-09 10:49:41 -04:00

sync.c

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6

2009-03-27 14:48:34 -07:00

timerfd.c

timerfd: add flags check

2009-02-18 15:37:53 -08:00

utimes.c

[CVE-2009-0029] System call wrappers part 30

2009-01-14 14:15:30 +01:00

xattr_acl.c

…

xattr.c

xattr: use memdup_user()

2009-04-20 23:02:50 -04:00