iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/fs
History
OGAWA Hirofumi 111ebb6e6f [PATCH] writeback: fix range handling 
When a writeback_control's `start' and `end' fields are used to
indicate a one-byte-range starting at file offset zero, the required
values of .start=0,.end=0 mean that the ->writepages() implementation
has no way of telling that it is being asked to perform a range
request.  Because we're currently overloading (start == 0 && end == 0)
to mean "this is not a write-a-range request".

To make all this sane, the patch changes range of writeback_control.

So caller does: If it is calling ->writepages() to write pages, it
sets range (range_start/end or range_cyclic) always.

And if range_cyclic is true, ->writepages() thinks the range is
cyclic, otherwise it just uses range_start and range_end.

This patch does,

    - Add LLONG_MAX, LLONG_MIN, ULLONG_MAX to include/linux/kernel.h
      -1 is usually ok for range_end (type is long long). But, if someone did,

		range_end += val;		range_end is "val - 1"
		u64val = range_end >> bits;	u64val is "~(0ULL)"

      or something, they are wrong. So, this adds LLONG_MAX to avoid nasty
      things, and uses LLONG_MAX for range_end.

    - All callers of ->writepages() sets range_start/end or range_cyclic.

    - Fix updates of ->writeback_index. It seems already bit strange.
      If it starts at 0 and ended by check of nr_to_write, this last
      index may reduce chance to scan end of file.  So, this updates
      ->writeback_index only if range_cyclic is true or whole-file is
      scanned.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Anton Altaparmakov <aia21@cantab.net>
Cc: Steven French <sfrench@us.ibm.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 07:42:49 -07:00
..
9p
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
adfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
affs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
afs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
autofs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
autofs4
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
befs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
bfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
cifs
[PATCH] writeback: fix range handling
2006-06-23 07:42:49 -07:00
coda
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
configfs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
cramfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
debugfs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
devfs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
devpts
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
efs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
exportfs
[PATCH] NFS server subtree_check returns dubious value
2006-05-21 12:59:16 -07:00
ext2
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
ext3
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
fat
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
freevxfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
fuse
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
hfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
hfsplus
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
hostfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
hpfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
hppfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
hugetlbfs
[PATCH] tightening hugetlb strict accounting
2006-06-23 07:42:48 -07:00
isofs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
jbd
[PATCH] Make address_space_operations->invalidatepage return void
2006-03-26 08:56:55 -08:00
jffs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
jffs2
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
jfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
lockd
NFS: make 2 functions static
2006-04-19 12:43:47 -04:00
minix
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
msdos
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
ncpfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
nfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
nfs_common
[PATCH] nfsacl: Solaris VxFS compatibility fix
2005-10-11 09:46:54 -07:00
nfsd
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
nls
[PATCH] fs: Use ARRAY_SIZE macro
2006-03-24 07:33:19 -08:00
ntfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
ocfs2
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
openpromfs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
partitions
[PATCH] Driver core: add generic "subsystem" link to all devices
2006-06-21 12:40:49 -07:00
proc
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
qnx4
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
ramfs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
reiserfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
romfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
smbfs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
sysfs
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
sysv
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
udf
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
ufs
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
vfat
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
xfs
[PATCH] for_each_possible_cpu: xfs
2006-06-23 07:42:45 -07:00
aio.c
[PATCH] use kzalloc and kcalloc in core fs code
2006-03-25 08:23:00 -08:00
attr.c
[PATCH] capable/capability.h (fs/)
2006-01-11 18:42:13 -08:00
bad_inode.c
[PATCH] Make most file operations structs in fs/ const
2006-03-28 09:16:06 -08:00
binfmt_aout.c
[PATCH] dump_thread() cleanup
2006-01-10 08:01:25 -08:00
binfmt_elf_fdpic.c
BUG_ON() Conversion in fs/binfmt_elf_fdpic.c
2006-03-24 18:38:48 +01:00
binfmt_elf.c
[PATCH] remove steal_locks()
2006-06-22 15:05:57 -07:00
binfmt_em86.c
…
binfmt_flat.c
[PATCH] binfmt_flat: don't check for EMFILE
2006-05-21 12:59:17 -07:00
binfmt_misc.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
binfmt_script.c
…
binfmt_som.c
[PATCH] mm: mm_init set_mm_counters
2005-10-29 21:40:38 -07:00
bio.c
[PATCH] Fix missing ret assignment in __bio_map_user() error path
2006-06-17 10:52:12 -07:00
block_dev.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
buffer.c
[PATCH] for_each_online_pgdat: renaming for_each_pgdat
2006-03-27 08:44:48 -08:00
char_dev.c
[PATCH] Simplify proc/devices and fix early termination regression
2006-03-31 12:18:53 -08:00
compat_ioctl.c
[PATCH] fs: Use ARRAY_SIZE macro
2006-03-24 07:33:19 -08:00
compat.c
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
dcache.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
dcookies.c
[PATCH] Use __read_mostly on some hot fs variables
2006-03-26 08:56:56 -08:00
direct-io.c
BUG_ON() Conversion in fs/direct-io.c
2006-04-01 01:10:13 +02:00
dnotify.c
[PATCH] Use __read_mostly on some hot fs variables
2006-03-26 08:56:56 -08:00
dquot.c
BUG_ON() Conversion in fs/dquot.c
2006-04-02 13:36:13 +02:00
drop_caches.c
[PATCH] drop-pagecache
2006-01-08 20:12:40 -08:00
eventpoll.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
exec.c
[PATCH] remove steal_locks()
2006-06-22 15:05:57 -07:00
fcntl.c
BUG_ON() Conversion in fs/fcntl.c
2006-04-02 13:37:19 +02:00
fifo.c
[PATCH] pipe.c/fifo.c code cleanups
2006-04-11 13:53:33 +02:00
file_table.c
[PATCH] get_empty_filp tweaks, inline epoll_init_file()
2006-03-23 07:38:17 -08:00
file.c
[PATCH] for_each_possible_cpu: fixes for generic part
2006-03-28 09:16:05 -08:00
filesystems.c
[PATCH] fix missing includes
2005-10-30 17:37:32 -08:00
fs-writeback.c
[PATCH] writeback: fix range handling
2006-06-23 07:42:49 -07:00
inode.c
BUG_ON() Conversion in fs/inode.c
2006-04-02 13:38:18 +02:00
inotify_user.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
inotify.c
[PATCH] inotify (4/5): allow watch removal from event handler
2006-06-20 05:25:19 -04:00
ioctl.c
[PATCH] capable/capability.h (fs/)
2006-01-11 18:42:13 -08:00
ioprio.c
[PATCH] capable/capability.h (fs/)
2006-01-11 18:42:13 -08:00
Kconfig
Merge branch 'audit.b21' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current
2006-06-20 15:37:56 -07:00
Kconfig.binfmt
[PATCH] frv: suppress configuration of certain features for FRV
2006-01-08 20:13:36 -08:00
libfs.c
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
locks.c
[PATCH] remove steal_locks()
2006-06-22 15:05:57 -07:00
Makefile
[PATCH] inotify (1/5): split kernel API from userspace support
2006-06-20 05:25:17 -04:00
mbcache.c
[PATCH] Typo fixes
2006-03-28 09:16:08 -08:00
mpage.c
[PATCH] writeback: fix range handling
2006-06-23 07:42:49 -07:00
namei.c
[PATCH] log more info for directory entry change events
2006-06-20 05:25:28 -04:00
namespace.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
nfsctl.c
[PATCH] fs: Use ARRAY_SIZE macro
2006-03-24 07:33:19 -08:00
open.c
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
pipe.c
[PATCH] VFS: Permit filesystem to override root dentry on mount
2006-06-23 07:42:45 -07:00
pnode.c
[PATCH] s/;;/;/g
2006-03-24 07:33:24 -08:00
pnode.h
[PATCH] unbindable mounts
2005-11-07 18:18:11 -08:00
posix_acl.c
[PATCH] gfp flags annotations - part 1
2005-10-08 15:00:57 -07:00
quota_v1.c
…
quota_v2.c
[PATCH] sem2mutex: quota
2006-03-23 07:38:11 -08:00
quota.c
[PATCH] sem2mutex: quota
2006-03-23 07:38:11 -08:00
read_write.c
[PATCH] splice: unlikely() optimizations
2006-04-11 13:56:09 +02:00
readdir.c
[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem
2006-01-09 15:59:24 -08:00
select.c
[PATCH] select: don't overflow if (SELECT_STACK_ALLOC % sizeof(long) != 0)
2006-04-11 06:18:41 -07:00
seq_file.c
[PATCH] sem2mutex: fs/seq_file.c
2006-03-23 07:38:12 -08:00
splice.c
[PATCH] splice: redo page lookup if add_to_page_cache() returns -EEXIST
2006-05-04 06:55:12 +02:00
stat.c
[PATCH] powerpc: Wire up *at syscalls
2006-04-28 21:04:59 +10:00
super.c
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
2006-06-23 07:42:45 -07:00
sync.c
[PATCH] writeback: fix range handling
2006-06-23 07:42:49 -07:00
xattr_acl.c
…
xattr.c
[PATCH] log more info for directory entry change events
2006-06-20 05:25:28 -04:00