diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-04 13:36:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-04 13:36:19 -0700 |
| commit | c35bcfd8e4e11bdff2ffab823a13a59968426b15 (patch) | |
| tree | fa3df11bfa937a8e5c456b445ccff085e70e78ed /fs | |
| parent | ce866e2d182b9e00e29e7a2eed4db908257d7f79 (diff) | |
| parent | d67fd44f697dff293d7cdc29af929241b669affe (diff) | |
Merge tag 'locks-v4.9-1' of git://git.samba.org/jlayton/linux
Pull file locking updates from Jeff Layton:
"Only a single patch from Nikolay this cycle, with a small change to
better handle /proc/locks in a containerized host"
* tag 'locks-v4.9-1' of git://git.samba.org/jlayton/linux:
locks: Filter /proc/locks output on proc pid ns
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/locks.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/locks.c b/fs/locks.c index 133fb2543d21..90ec67108b22 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -2603,9 +2603,20 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl, struct inode *inode = NULL; unsigned int fl_pid; - if (fl->fl_nspid) - fl_pid = pid_vnr(fl->fl_nspid); - else + if (fl->fl_nspid) { + struct pid_namespace *proc_pidns = file_inode(f->file)->i_sb->s_fs_info; + + /* Don't let fl_pid change based on who is reading the file */ + fl_pid = pid_nr_ns(fl->fl_nspid, proc_pidns); + + /* + * If there isn't a fl_pid don't display who is waiting on + * the lock if we are called from locks_show, or if we are + * called from __show_fd_info - skip lock entirely + */ + if (fl_pid == 0) + return; + } else fl_pid = fl->fl_pid; if (fl->fl_file != NULL) @@ -2677,9 +2688,13 @@ static int locks_show(struct seq_file *f, void *v) { struct locks_iterator *iter = f->private; struct file_lock *fl, *bfl; + struct pid_namespace *proc_pidns = file_inode(f->file)->i_sb->s_fs_info; fl = hlist_entry(v, struct file_lock, fl_link); + if (fl->fl_nspid && !pid_nr_ns(fl->fl_nspid, proc_pidns)) + return 0; + lock_get_status(f, fl, iter->li_pos, ""); list_for_each_entry(bfl, &fl->fl_block, fl_block) |