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
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
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
nfsd	[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry	2006-06-23 07:42:45 -07:00
nls
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
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c
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
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
char_dev.c
compat_ioctl.c
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
direct-io.c
dnotify.c
dquot.c
drop_caches.c
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
fifo.c
file_table.c
file.c
filesystems.c
fs-writeback.c	[PATCH] writeback: fix range handling	2006-06-23 07:42:49 -07:00
inode.c
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
ioprio.c
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
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
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
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
pnode.h
posix_acl.c
quota_v1.c
quota_v2.c
quota.c
read_write.c
readdir.c
select.c
seq_file.c
splice.c	[PATCH] splice: redo page lookup if add_to_page_cache() returns -EEXIST	2006-05-04 06:55:12 +02:00
stat.c
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