From 3a27411cb4bc3ce31db228e3569ad01b462a4310 Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Wed, 15 Mar 2017 19:12:59 +0100
Subject: 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>
---
fs/gfs2/inode.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
(limited to 'fs/gfs2/inode.c')
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,
--
cgit