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gfs2: Implement SEEK_HOLE / SEEK_DATA via iomap

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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>
This commit is contained in:
Andreas Gruenbacher
2017-03-15 19:12:59 +01:00
parent aac1a55b45
commit 3a27411cb4
3 changed files with 54 additions and 3 deletions
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38
fs/gfs2/inode.c
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@@ -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,