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authorChao Yu <yuchao0@huawei.com>2020-03-28 17:40:40 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2020-05-08 06:55:56 -0700
commitbf38fbad12b365223f9c5d4057f741bb03372737 (patch)
tree49f8df9c4ccd9d5352d5a5c479727795f2a714c0 /fs/f2fs
parent3265d3db1f16395cfc6b8ea9b31b4001d98d05ef (diff)
f2fs: support fiemap on compressed inode
Map normal/compressed cluster of compressed inode correctly, and give the right fiemap flag FIEMAP_EXTENT_ENCODED on mapped compressed extent. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/data.c55
1 files changed, 53 insertions, 2 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index a5505aba2a1f..b79d643470d6 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1832,6 +1832,25 @@ static int f2fs_xattr_fiemap(struct inode *inode,
return (err < 0 ? err : 0);
}
+static loff_t max_inode_blocks(struct inode *inode)
+{
+ loff_t result = ADDRS_PER_INODE(inode);
+ loff_t leaf_count = ADDRS_PER_BLOCK(inode);
+
+ /* two direct node blocks */
+ result += (leaf_count * 2);
+
+ /* two indirect node blocks */
+ leaf_count *= NIDS_PER_BLOCK;
+ result += (leaf_count * 2);
+
+ /* one double indirect node block */
+ leaf_count *= NIDS_PER_BLOCK;
+ result += leaf_count;
+
+ return result;
+}
+
int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 start, u64 len)
{
@@ -1841,6 +1860,8 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 logical = 0, phys = 0, size = 0;
u32 flags = 0;
int ret = 0;
+ bool compr_cluster = false;
+ unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
ret = f2fs_precache_extents(inode);
@@ -1875,6 +1896,9 @@ next:
memset(&map_bh, 0, sizeof(struct buffer_head));
map_bh.b_size = len;
+ if (compr_cluster)
+ map_bh.b_size = blk_to_logical(inode, cluster_size - 1);
+
ret = get_data_block(inode, start_blk, &map_bh, 0,
F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
if (ret)
@@ -1885,7 +1909,7 @@ next:
start_blk = next_pgofs;
if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
- F2FS_I_SB(inode)->max_file_blocks))
+ max_inode_blocks(inode)))
goto prep_next;
flags |= FIEMAP_EXTENT_LAST;
@@ -1897,11 +1921,38 @@ next:
ret = fiemap_fill_next_extent(fieinfo, logical,
phys, size, flags);
+ if (ret)
+ goto out;
+ size = 0;
}
- if (start_blk > last_blk || ret)
+ if (start_blk > last_blk)
goto out;
+ if (compr_cluster) {
+ compr_cluster = false;
+
+
+ logical = blk_to_logical(inode, start_blk - 1);
+ phys = blk_to_logical(inode, map_bh.b_blocknr);
+ size = blk_to_logical(inode, cluster_size);
+
+ flags |= FIEMAP_EXTENT_ENCODED;
+
+ start_blk += cluster_size - 1;
+
+ if (start_blk > last_blk)
+ goto out;
+
+ goto prep_next;
+ }
+
+ if (map_bh.b_blocknr == COMPRESS_ADDR) {
+ compr_cluster = true;
+ start_blk++;
+ goto prep_next;
+ }
+
logical = blk_to_logical(inode, start_blk);
phys = blk_to_logical(inode, map_bh.b_blocknr);
size = map_bh.b_size;