staging/lustre/llite: restore ll_fiemap

It was removed by coan by mistake when first porting the code.

Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index fb85a58db058ec3f34cf80065e4b9cdb5e35c05f..c5b721c9cffd543ded666f1fdcede6dd0185f8fb 100644 (file)
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -2628,6 +2628,38 @@ int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat)
        return ll_getattr_it(mnt, de, &it, stat);
 }
 
+int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+               __u64 start, __u64 len)
+{
+       int rc;
+       size_t num_bytes;
+       struct ll_user_fiemap *fiemap;
+       unsigned int extent_count = fieinfo->fi_extents_max;
+
+       num_bytes = sizeof(*fiemap) + (extent_count *
+                                      sizeof(struct ll_fiemap_extent));
+       OBD_ALLOC_LARGE(fiemap, num_bytes);
+
+       if (fiemap == NULL)
+               return -ENOMEM;
+
+       fiemap->fm_flags = fieinfo->fi_flags;
+       fiemap->fm_extent_count = fieinfo->fi_extents_max;
+       fiemap->fm_start = start;
+       fiemap->fm_length = len;
+       memcpy(&fiemap->fm_extents[0], fieinfo->fi_extents_start,
+              sizeof(struct ll_fiemap_extent));
+
+       rc = ll_do_fiemap(inode, fiemap, num_bytes);
+
+       fieinfo->fi_flags = fiemap->fm_flags;
+       fieinfo->fi_extents_mapped = fiemap->fm_mapped_extents;
+       memcpy(fieinfo->fi_extents_start, &fiemap->fm_extents[0],
+              fiemap->fm_mapped_extents * sizeof(struct ll_fiemap_extent));
+
+       OBD_FREE_LARGE(fiemap, num_bytes);
+       return rc;
+}
 
 struct posix_acl * ll_get_acl(struct inode *inode, int type)
 {
@@ -2740,6 +2772,7 @@ struct inode_operations ll_file_inode_operations = {
        .getxattr       = ll_getxattr,
        .listxattr      = ll_listxattr,
        .removexattr    = ll_removexattr,
+       .fiemap         = ll_fiemap,
        .get_acl        = ll_get_acl,
 };