Rename EXT4_EX_FILTER to EXT4_EX_QUERY_FILTER to better describe its
purpose as a filter mask used specifically in ext4_map_query_blocks().
Add a comment explaining that this macro is used to filter flags needed
when querying the on-disk extent tree.
We will later use EXT4_EX_QUERY_FILTER mask to add another
EXT4_GET_BLOCKS_QUERY needed to lookup in on-disk extent tree.
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx>
---
fs/ext4/ext4.h | 7 ++++++-
fs/ext4/inode.c | 2 +-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 201afaaa508a..c0489220d3c4 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -757,7 +757,12 @@ enum {
#define EXT4_EX_NOCACHE 0x40000000
#define EXT4_EX_FORCE_CACHE 0x20000000
#define EXT4_EX_NOFAIL 0x10000000
-#define EXT4_EX_FILTER 0x70000000
+/*
+ * ext4_map_query_blocks() uses this filter mask to filter the flags needed to
+ * pass while lookup/querying of on disk extent tree.
+ */
+#define EXT4_EX_QUERY_FILTER (EXT4_EX_NOCACHE | EXT4_EX_FORCE_CACHE |\
+ EXT4_EX_NOFAIL)
/*
* Flags used by ext4_free_blocks
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 459ffc6af1d3..d662ff486a82 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -546,7 +546,7 @@ static int ext4_map_query_blocks(handle_t *handle, struct inode *inode,
unsigned int orig_mlen = map->m_len;
unsigned int query_flags = flags & EXT4_GET_BLOCKS_QUERY_LAST_IN_LEAF;
- flags &= EXT4_EX_FILTER;
+ flags &= EXT4_EX_QUERY_FILTER;
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
retval = ext4_ext_map_blocks(handle, inode, map,
flags | query_flags);
--
2.49.0
