Commit 6dab8157 authored by Chris Mason's avatar Chris Mason

Btrfs: Hold csum mutex while reading in sums during readpages

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 2dd3e67b
......@@ -150,7 +150,6 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
path = btrfs_alloc_path();
path->reada = 2;
WARN_ON(bio->bi_vcnt <= 0);
......@@ -177,6 +176,7 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
printk("no csum found for inode %lu start "
"%llu\n", inode->i_ino,
(unsigned long long)offset);
item = NULL;
goto found;
}
btrfs_item_key_to_cpu(path->nodes[0], &found_key,
......
......@@ -376,7 +376,9 @@ int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
if (!(rw & (1 << BIO_RW))) {
if (!btrfs_test_opt(root, NODATASUM) &&
!btrfs_test_flag(inode, NODATASUM)) {
mutex_lock(&BTRFS_I(inode)->csum_mutex);
btrfs_lookup_bio_sums(root, inode, bio);
mutex_unlock(&BTRFS_I(inode)->csum_mutex);
}
goto mapit;
}
......
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