Adjust sb->s_blocksize{,_bits} directly for file-backed
mounts when the fs block size is smaller than PAGE_SIZE.
Previously, EROFS used sb_set_blocksize(), which caused
a panic if bdev-backed mounts is not used.
Fixes: fb176750266a ("erofs: add file-backed mount support")
Signed-off-by: Hongzhen Luo <hongz...@linux.alibaba.com>
---
v4: Remove unnecessary parentheses.
v3:
https://lore.kernel.org/all/20241015070750.3489603-1-hongz...@linux.alibaba.com/
v2:
https://lore.kernel.org/linux-erofs/20241015064007.3449582-1-hongz...@linux.alibaba.com/
v1:
https://lore.kernel.org/linux-erofs/20241015033601.3206952-1-hongz...@linux.alibaba.com/
---
fs/erofs/super.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 320d586c3896..14031141bde8 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -631,7 +631,11 @@ static int erofs_fc_fill_super(struct super_block *sb,
struct fs_context *fc)
errorfc(fc, "unsupported blksize for fscache mode");
return -EINVAL;
}
- if (!sb_set_blocksize(sb, 1 << sbi->blkszbits)) {
+
+ if (erofs_is_fileio_mode(sbi)) {
+ sb->s_blocksize = 1 << sbi->blkszbits;
+ sb->s_blocksize_bits = sbi->blkszbits;
+ } else if (!sb_set_blocksize(sb, 1 << sbi->blkszbits)) {
errorfc(fc, "failed to set erofs blksize");
return -EINVAL;
}
--
2.43.5
