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authorAndreas Gruenbacher <agruenba@redhat.com>2017-10-01 17:57:54 -0400
committerTheodore Ts'o <tytso@mit.edu>2017-10-01 17:57:54 -0400
commit7046ae35329f6d3cd39ae22d96d9525e45e748f2 (patch)
tree36e5e48ac89d51b965d860b2d5525060121f5c21 /fs/ext4/inline.c
parent9ca250a5137f3df7ffac58b49660beadd5926ace (diff)
downloadlinux-stericsson-7046ae35329f6d3cd39ae22d96d9525e45e748f2.tar.gz
ext4: Add iomap support for inline data
Report inline data as a IOMAP_F_DATA_INLINE mapping. This allows to use iomap_seek_hole and iomap_seek_data in ext4_llseek and makes switching to iomap_fiemap in ext4_fiemap easier. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4/inline.c')
-rw-r--r--fs/ext4/inline.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 28c5c3abddb3..f0bbc8cb6555 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -12,6 +12,7 @@
* GNU General Public License for more details.
*/
+#include <linux/iomap.h>
#include <linux/fiemap.h>
#include "ext4_jbd2.h"
@@ -1827,6 +1828,38 @@ int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
return ret;
}
+int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap)
+{
+ __u64 addr;
+ int error = -EAGAIN;
+ struct ext4_iloc iloc;
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode))
+ goto out;
+
+ error = ext4_get_inode_loc(inode, &iloc);
+ if (error)
+ goto out;
+
+ addr = (__u64)iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits;
+ addr += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data;
+ addr += offsetof(struct ext4_inode, i_block);
+
+ brelse(iloc.bh);
+
+ iomap->addr = addr;
+ iomap->offset = 0;
+ iomap->length = min_t(loff_t, ext4_get_inline_size(inode),
+ i_size_read(inode));
+ iomap->type = 0;
+ iomap->flags = IOMAP_F_DATA_INLINE;
+
+out:
+ up_read(&EXT4_I(inode)->xattr_sem);
+ return error;
+}
+
int ext4_inline_data_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo,
int *has_inline, __u64 start, __u64 len)