This patch allows mounting filesystems with blocksize smaller than the
PAGE_SIZE.
Signed-off-by: Chandan Rajendra <chandan@xxxxxxxxxxxxxxxxxx>
---
fs/btrfs/disk-io.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index ea540ba..07ccae3 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -4095,17 +4095,12 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
* Check sectorsize and nodesize first, other check will need it.
* Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here.
*/
- if (!is_power_of_2(sectorsize) || sectorsize < 4096 ||
+ if (!is_power_of_2(sectorsize) || sectorsize < 2048 ||
sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) {
printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize);
ret = -EINVAL;
}
- /* Only PAGE SIZE is supported yet */
- if (sectorsize != PAGE_CACHE_SIZE) {
- printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n",
- sectorsize, PAGE_CACHE_SIZE);
- ret = -EINVAL;
- }
+
if (!is_power_of_2(nodesize) || nodesize < sectorsize ||
nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) {
printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize);
@@ -4129,6 +4124,7 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
btrfs_super_chunk_root(sb));
ret = -EINVAL;
}
+
if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) {
printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n",
btrfs_super_log_root(sb));
--
2.1.0
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