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authorSteven Rostedt (Google) <rostedt@goodmis.org>2024-05-02 23:08:26 +0300
committerSteven Rostedt (Google) <rostedt@goodmis.org>2024-05-04 11:25:37 +0300
commit22e61e15af731dbe46704c775d2335e56fcef4e9 (patch)
treed5eb4cbea4121aaad70375c1ae4e75b6be1d0cfa /fs/tracefs
parentd53891d348ac3eceaf48f4732a1f4f5c0e0a55ce (diff)
downloadlinux-22e61e15af731dbe46704c775d2335e56fcef4e9.tar.xz
eventfs: Do not treat events directory different than other directories
Treat the events directory the same as other directories when it comes to permissions. The events directory was considered different because it's dentry is persistent, whereas the other directory dentries are created when accessed. But the way tracefs now does its ownership by using the root dentry's permissions as the default permissions, the events directory can get out of sync when a remount is performed setting the group and user permissions. Remove the special case for the events directory on setting the attributes. This allows the updates caused by remount to work properly as well as simplifies the code. Link: https://lore.kernel.org/linux-trace-kernel/20240502200906.002923579@goodmis.org Cc: stable@vger.kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Andrew Morton <akpm@linux-foundation.org> Fixes: 8186fff7ab649 ("tracefs/eventfs: Use root and instance inodes as default ownership") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'fs/tracefs')
-rw-r--r--fs/tracefs/event_inode.c16
1 files changed, 1 insertions, 15 deletions
diff --git a/fs/tracefs/event_inode.c b/fs/tracefs/event_inode.c
index 9dacf65c0b6e..6e08405892ae 100644
--- a/fs/tracefs/event_inode.c
+++ b/fs/tracefs/event_inode.c
@@ -206,21 +206,7 @@ static int eventfs_set_attr(struct mnt_idmap *idmap, struct dentry *dentry,
* determined by the parent directory.
*/
if (dentry->d_inode->i_mode & S_IFDIR) {
- /*
- * The events directory dentry is never freed, unless its
- * part of an instance that is deleted. It's attr is the
- * default for its child files and directories.
- * Do not update it. It's not used for its own mode or ownership.
- */
- if (ei->is_events) {
- /* But it still needs to know if it was modified */
- if (iattr->ia_valid & ATTR_UID)
- ei->attr.mode |= EVENTFS_SAVE_UID;
- if (iattr->ia_valid & ATTR_GID)
- ei->attr.mode |= EVENTFS_SAVE_GID;
- } else {
- update_attr(&ei->attr, iattr);
- }
+ update_attr(&ei->attr, iattr);
} else {
name = dentry->d_name.name;