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Diffstat (limited to 'drivers/block/nbd.c')
-rw-r--r--drivers/block/nbd.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 9d1035e8d9d..090796bef78 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -355,14 +355,30 @@ harderror:
return NULL;
}
+static ssize_t pid_show(struct gendisk *disk, char *page)
+{
+ return sprintf(page, "%ld\n",
+ (long) ((struct nbd_device *)disk->private_data)->pid);
+}
+
+static struct disk_attribute pid_attr = {
+ .attr = { .name = "pid", .mode = S_IRUGO },
+ .show = pid_show,
+};
+
static void nbd_do_it(struct nbd_device *lo)
{
struct request *req;
BUG_ON(lo->magic != LO_MAGIC);
+ lo->pid = current->pid;
+ sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
+
while ((req = nbd_read_stat(lo)) != NULL)
nbd_end_request(req);
+
+ sysfs_remove_file(&lo->disk->kobj, &pid_attr.attr);
return;
}
@@ -521,7 +537,7 @@ static int nbd_ioctl(struct inode *inode, struct file *file,
error = -EINVAL;
file = fget(arg);
if (file) {
- inode = file->f_dentry->d_inode;
+ inode = file->f_path.dentry->d_inode;
if (S_ISSOCK(inode->i_mode)) {
lo->file = file;
lo->sock = SOCKET_I(inode);