From: Darrick J. Wong <djwong@xxxxxxxxxx>
Create an alias for the debugfs dir so that we can find a filesystem by
uuid. Unless it's mounted nouuid.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/xfs_mount.h | 1 +
fs/xfs/xfs_super.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 7cfd209404365..63649c259b9c5 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -235,6 +235,7 @@ typedef struct xfs_mount {
uint64_t m_resblks_save; /* reserved blks @ remount,ro */
struct delayed_work m_reclaim_work; /* background inode reclaim */
struct dentry *m_debugfs; /* debugfs parent */
+ struct dentry *m_debugfs_uuid; /* debugfs symlink */
struct xfs_kobj m_kobj;
struct xfs_kobj m_error_kobj;
struct xfs_kobj m_error_meta_kobj;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 69f1c1d85edf6..29a53874490cc 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -768,6 +768,7 @@ xfs_mount_free(
if (mp->m_ddev_targp)
xfs_free_buftarg(mp->m_ddev_targp);
+ debugfs_remove(mp->m_debugfs_uuid);
debugfs_remove(mp->m_debugfs);
xfs_timestats_destroy(mp);
kfree(mp->m_rtname);
@@ -1799,6 +1800,16 @@ xfs_fs_fill_super(
goto out_unmount;
}
+ if (xfs_debugfs && mp->m_debugfs && !xfs_has_nouuid(mp)) {
+ char name[UUID_STRING_LEN + 1];
+
+ snprintf(name, UUID_STRING_LEN + 1, "%pU", &mp->m_sb.sb_uuid);
+ mp->m_debugfs_uuid = debugfs_create_symlink(name, xfs_debugfs,
+ mp->m_super->s_id);
+ } else {
+ mp->m_debugfs_uuid = NULL;
+ }
+
return 0;
out_filestream_unmount:
