GFS2: Switch fiemap implementation to use iomap

This patch switches GFS2's implementation of fiemap from the old
block_map code to the new iomap interface.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

1 files changed, 9 insertions, 25 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index b288cf2f85e6..321da48ca123 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -18,7 +18,7 @@
 #include <linux/posix_acl.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/crc32.h>
-#include <linux/fiemap.h>
+#include <linux/iomap.h>
 #include <linux/security.h>
 #include <linux/uaccess.h>
 
@@ -2003,6 +2003,10 @@ static int gfs2_getattr(const struct path *path, struct kstat *stat,
         return 0;
 }
 
+const struct iomap_ops gfs2_iomap_ops = {
+        .iomap_begin = gfs2_iomap_begin,
+};
+
 static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
                        u64 start, u64 len)
 {
@@ -2010,38 +2014,18 @@ static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
         struct gfs2_holder gh;
         int ret;
 
-        ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
-        if (ret)
-                return ret;
-
-        inode_lock(inode);
+        inode_lock_shared(inode);
 
         ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
         if (ret)
                 goto out;
 
-        if (gfs2_is_stuffed(ip)) {
-                u64 phys = ip->i_no_addr << inode->i_blkbits;
-                u64 size = i_size_read(inode);
-                u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
-                            FIEMAP_EXTENT_DATA_INLINE;
-                phys += sizeof(struct gfs2_dinode);
-                phys += start;
-                if (start + len > size)
-                        len = size - start;
-                if (start < size)
-                        ret = fiemap_fill_next_extent(fieinfo, start, phys,
-                                                      len, flags);
-                if (ret == 1)
-                        ret = 0;
-        } else {
-                ret = __generic_block_fiemap(inode, fieinfo, start, len,
-                                             gfs2_block_map);
-        }
+        ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
 
         gfs2_glock_dq_uninit(&gh);
+
 out:
-        inode_unlock(inode);
+        inode_unlock_shared(inode);
         return ret;
 }