Commit e1a1c997 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by Linus Torvalds

proc: fix proc_kill_inodes to kill dentries on all proc superblocks

It appears we overlooked support for removing generic proc files
when we added support for multiple proc super blocks.  Handle
that now.

[akpm@linux-foundation.org: coding-style cleanups]
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
Acked-by: default avatarPavel Emelyanov <xemul@openvz.org>
Cc: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: default avatarSukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 71054585
......@@ -561,28 +561,33 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
static void proc_kill_inodes(struct proc_dir_entry *de)
{
struct list_head *p;
struct super_block *sb = proc_mnt->mnt_sb;
struct super_block *sb;
/*
* Actually it's a partial revoke().
*/
file_list_lock();
list_for_each(p, &sb->s_files) {
struct file * filp = list_entry(p, struct file, f_u.fu_list);
struct dentry * dentry = filp->f_path.dentry;
struct inode * inode;
const struct file_operations *fops;
if (dentry->d_op != &proc_dentry_operations)
continue;
inode = dentry->d_inode;
if (PDE(inode) != de)
continue;
fops = filp->f_op;
filp->f_op = NULL;
fops_put(fops);
spin_lock(&sb_lock);
list_for_each_entry(sb, &proc_fs_type.fs_supers, s_instances) {
file_list_lock();
list_for_each(p, &sb->s_files) {
struct file *filp = list_entry(p, struct file,
f_u.fu_list);
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode;
const struct file_operations *fops;
if (dentry->d_op != &proc_dentry_operations)
continue;
inode = dentry->d_inode;
if (PDE(inode) != de)
continue;
fops = filp->f_op;
filp->f_op = NULL;
fops_put(fops);
}
file_list_unlock();
}
file_list_unlock();
spin_unlock(&sb_lock);
}
static struct proc_dir_entry *proc_create(struct proc_dir_entry **parent,
......
......@@ -78,3 +78,5 @@ static inline int proc_fd(struct inode *inode)
{
return PROC_I(inode)->fd;
}
extern struct file_system_type proc_fs_type;
......@@ -98,7 +98,7 @@ static void proc_kill_sb(struct super_block *sb)
put_pid_ns(ns);
}
static struct file_system_type proc_fs_type = {
struct file_system_type proc_fs_type = {
.name = "proc",
.get_sb = proc_get_sb,
.kill_sb = proc_kill_sb,
......
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