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gfs2: getlabel support 

Add support for the GETFSLABEL ioctl in gfs2.
I tested this patch and it works as expected.

Signed-off-by: Steve Whitehouse <swhiteho@redhat.com>
Tested-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Steve Whitehouse 2018-10-08 14:32:35 -05:00 committed by Bob Peterson
parent 1eb8d73879
commit 6ddc5c3ddf
1 changed files with 14 additions and 0 deletions
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14
fs/gfs2/file.c
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@ -314,6 +314,17 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
return do_gfs2_set_flags(filp, gfsflags, mask);
}
static int gfs2_getlabel(struct file *filp, char __user *label)
{
struct inode *inode = file_inode(filp);
struct gfs2_sbd *sdp = GFS2_SB(inode);
if (copy_to_user(label, sdp->sd_sb.sb_locktable, GFS2_LOCKNAME_LEN))
return -EFAULT;
return 0;
}
static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch(cmd) {
@ -323,7 +334,10 @@ static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return gfs2_set_flags(filp, (u32 __user *)arg);
case FITRIM:
return gfs2_fitrim(filp, (void __user *)arg);
case FS_IOC_GETFSLABEL:
return gfs2_getlabel(filp, (char __user *)arg);
}
return -ENOTTY;
}