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fs: restore nobh

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Implement nobh in new aops.  This is a bit tricky.  FWIW, nobh_truncate is
now implemented in a way that does not create blocks in sparse regions,
which is a silly thing for it to have been doing (isn't it?)

ext2 survives fsx and fsstress. jfs is converted as well... ext3
should be easy to do (but not done yet).

[[email protected]: coding-style fixes]
Cc: Badari Pulavarty <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Nick Piggin 2007-10-16 01:25:25 -07:00 • committed by Linus Torvalds
commit 03158cd7eb
4 changed files with 178 additions and 88 deletions
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7
fs/jfs/inode.c
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@ -279,8 +279,7 @@ static int jfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
*pagep = NULL;
return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
return nobh_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
jfs_get_block);
}
@ -306,7 +305,7 @@ const struct address_space_operations jfs_aops = {
.writepages = jfs_writepages,
.sync_page = block_sync_page,
.write_begin = jfs_write_begin,
.write_end = generic_write_end,
.write_end = nobh_write_end,
.bmap = jfs_bmap,
.direct_IO = jfs_direct_IO,
};
@ -359,7 +358,7 @@ void jfs_truncate(struct inode *ip)
{
jfs_info("jfs_truncate: size = 0x%lx", (ulong) ip->i_size);
block_truncate_page(ip->i_mapping, ip->i_size, jfs_get_block);
nobh_truncate_page(ip->i_mapping, ip->i_size, jfs_get_block);
IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
jfs_truncate_nolock(ip, ip->i_size);