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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-07-25 22:44:53 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-07-25 23:29:21 +0900
commit89c0fd014d34d409a7b196667c2b9a4813b6c968 (patch)
tree9fad0ab3ce77b7537ed7d8db45c40e746e26692f /include/linux/nilfs2_fs.h
parent6cda9fa2575ec0869fe77b0bdf295c0e51868cab (diff)
downloadop-kernel-dev-89c0fd014d34d409a7b196667c2b9a4813b6c968.zip
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nilfs2: reject filesystem with unsupported block size
This inserts sanity check that refuses to mount a filesystem with unsupported block size. Previously, kernel code of nilfs was looking only limitation of devices though mkfs.nilfs2 limits the range of block sizes; there was no check that prevents rec_len overflow with larger block sizes. With this change, block sizes larger than 64KB or smaller than 1KB will get rejected explicitly by kernel. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'include/linux/nilfs2_fs.h')
-rw-r--r--include/linux/nilfs2_fs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 970828a..f5487b6 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -287,6 +287,12 @@ struct nilfs_super_block {
#define NILFS_NAME_LEN 255
/*
+ * Block size limitations
+ */
+#define NILFS_MIN_BLOCK_SIZE 1024
+#define NILFS_MAX_BLOCK_SIZE 65536
+
+/*
* The new version of the directory entry. Since V0 structures are
* stored in intel byte order, and the name_len field could never be
* bigger than 255 chars, it's safe to reclaim the extra byte for the
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