In fileio mode, when blcksize is not equal to PAGE_SIZE,
erofs will attempt to set the block size of sb->s_bdev,
which will trigger a panic. This patch fixes this.
Fixes: fb176750266a ("erofs: add file-backed mount support")
Signed-off-by: Hongzhen Luo <[email protected]>
---
v2: Add support for blocksize < PAGE_SIZE in file-backed mount mode.
v1:
https://lore.kernel.org/linux-erofs/[email protected]/
---
fs/erofs/super.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 320d586c3896..abe2d85512dd 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -631,9 +631,15 @@ 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)) {
- errorfc(fc, "failed to set erofs blksize");
- return -EINVAL;
+
+ 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
