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Btrfs: move O_DIRECT space reservation to btrfs_direct_IO 

This moves the delalloc space reservation done for O_DIRECT
into btrfs_direct_IO.  This way we don't leak reserved space
if the generic O_DIRECT write code errors out before it
calls into btrfs_direct_IO.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-05-26 10:59:53 -04:00
parent 4845e44ffd
commit 3f7c579c41
2 changed files with 8 additions and 6 deletions
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5
fs/btrfs/file.c
View File

@ -888,14 +888,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
BTRFS_I(inode)->sequence++;
if (unlikely(file->f_flags & O_DIRECT)) {
ret = btrfs_delalloc_reserve_space(inode, count);
if (ret)
goto out;
num_written = generic_file_direct_write(iocb, iov, &nr_segs,
pos, ppos, count,
ocount);
/*
* the generic O_DIRECT will update in-memory i_size after the
* DIOs are done. But our endio handlers that update the on

9
fs/btrfs/inode.c
View File

@ -5602,9 +5602,16 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
ssize_t ret;
int writing = rw & WRITE;
int write_bits = 0;
size_t count = iov_length(iov, nr_segs);
lockstart = offset;
lockend = offset + iov_length(iov, nr_segs) - 1;
lockend = offset + count - 1;
if (writing) {
ret = btrfs_delalloc_reserve_space(inode, count);
if (ret)
goto out;
}
while (1) {
lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,