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authorAndreas Gruenbacher <agruenba@redhat.com>2017-03-15 19:12:59 +0100
committerAndreas Gruenbacher <agruenba@redhat.com>2017-10-31 14:26:35 +0100
commit3a27411cb4bc3ce31db228e3569ad01b462a4310 (patch)
tree368d27aa18ab8867bfb8443b2223d7de421f0123 /fs/gfs2/inode.c
parentaac1a55b450c623ec236c0635cdb68408f632e9c (diff)
gfs2: Implement SEEK_HOLE / SEEK_DATA via iomap
So far, lseek on gfs2 did not report holes. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 321da48ca123..4749a6b8e4dd 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -2029,6 +2029,44 @@ out:
return ret;
}
+loff_t gfs2_seek_data(struct file *file, loff_t offset)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_holder gh;
+ loff_t ret;
+
+ inode_lock_shared(inode);
+ ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+ if (!ret)
+ ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops);
+ gfs2_glock_dq_uninit(&gh);
+ inode_unlock_shared(inode);
+
+ if (ret < 0)
+ return ret;
+ return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
+}
+
+loff_t gfs2_seek_hole(struct file *file, loff_t offset)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_holder gh;
+ loff_t ret;
+
+ inode_lock_shared(inode);
+ ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+ if (!ret)
+ ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops);
+ gfs2_glock_dq_uninit(&gh);
+ inode_unlock_shared(inode);
+
+ if (ret < 0)
+ return ret;
+ return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
+}
+
const struct inode_operations gfs2_file_iops = {
.permission = gfs2_permission,
.setattr = gfs2_setattr,