CC: Dave Miller

Signed-off-by: Erez Zadok
---
fs/unionfs/main.c | 7 ++++++-
fs/unionfs/super.c | 4 +++-
fs/unionfs/union.h | 1 +
3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/unionfs/main.c b/fs/unionfs/main.c
index 8f59fb5..b76264a 100644
--- a/fs/unionfs/main.c
+++ b/fs/unionfs/main.c
@@ -736,7 +736,12 @@ static int unionfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name,
void *raw_data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, raw_data, unionfs_read_super, mnt);
+ int err;
+ err = get_sb_nodev(fs_type, flags, raw_data, unionfs_read_super, mnt);
+ if (!err)
+ UNIONFS_SB(mnt->mnt_sb)->dev_name =
+ kstrdup(dev_name, GFP_KERNEL);
+ return err;
}

static struct file_system_type unionfs_fs_type = {
diff --git a/fs/unionfs/super.c b/fs/unionfs/super.c
index 2456654..e5cb235 100644
--- a/fs/unionfs/super.c
+++ b/fs/unionfs/super.c
@@ -134,6 +134,7 @@ static void unionfs_put_super(struct super_block *sb)
atomic_dec(&s->s_active);
}

+ kfree(spd->dev_name);
kfree(spd->data);
kfree(spd);
sb->s_fs_info = NULL;
@@ -805,7 +806,8 @@ out_no_change:
atomic_set(&UNIONFS_D(sb->s_root)->generation, i);
atomic_set(&UNIONFS_I(sb->s_root->d_inode)->generation, i);
if (!(*flags & MS_SILENT))
- pr_info("unionfs: new generation number %d\n", i);
+ pr_info("unionfs: %s: new generation number %d\n",
+ UNIONFS_SB(sb)->dev_name, i);
/* finally, update the root dentry's times */
unionfs_copy_attr_times(sb->s_root->d_inode);
err = 0; /* reset to success */
diff --git a/fs/unionfs/union.h b/fs/unionfs/union.h
index e93b9ef..4ca4e76 100644
--- a/fs/unionfs/union.h
+++ b/fs/unionfs/union.h
@@ -159,6 +159,7 @@ struct unionfs_sb_info {
struct rw_semaphore rwsem;
pid_t write_lock_owner; /* PID of rw_sem owner (write lock) */
int high_branch_id; /* last unique branch ID given */
+ char *dev_name; /* to identify different unions in pr_debug */
struct unionfs_data *data;
};

--
1.5.2.2

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