This patch adds a max block count for f2fs_map_blocks
Signed-off-by: Yunlei He <heyun...@huawei.com>
Signed-off-by: Xue Liu <liuxueliu....@huawei.com>
---
fs/f2fs/data.c | 4 ++++
fs/f2fs/f2fs.h | 3 +++
2 files changed, 7 insertions(+)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e34b1bd..2a16c867 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -578,6 +578,10 @@ int f2fs_map_blocks(struct inode *inode, struct
f2fs_map_blocks *map,
map->m_len = 0;
map->m_flags = 0;
+ /* We can handle the block number less than F2FS_MAX_BLOCKS */
+ if (unlikely(map->m_lblk >= F2FS_MAX_BLOCKS))
+ return -EUCLEAN;
+
/* it only supports block size == page size */
pgofs = (pgoff_t)map->m_lblk;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 19beabe..911c99b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -331,6 +331,9 @@ enum {
#define F2FS_LINK_MAX 0xffffffff /* maximum link count per file */
+
+#define F2FS_MAX_BLOCKS 0x3F015AFF /* maximum block count per file */
+
#define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */
/* vector size for gang look-up from extent cache that consists of radix tree
*/
--
1.9.1
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