Pavel Emelianov [[email protected]] wrote:
| Eric W. Biederman wrote:
| > It appears we overlooked support for removing generic proc files
| > when we added support for multiple proc super blocks. Handle
| > that now.
| >
| > Signed-off-by: Eric W. Biederman <[email protected]>
|
| AFAIS this is just making the kill for all the super blocks
| we have.
|
| Acked-by: Pavel Emelyanov <[email protected]>
Acked-by: Sukadev Bhattiprolu <[email protected]>
|
| > ---
| > fs/proc/generic.c | 38 +++++++++++++++++++++-----------------
| > fs/proc/internal.h | 2 ++
| > fs/proc/root.c | 2 +-
| > 3 files changed, 24 insertions(+), 18 deletions(-)
| >
| > diff --git a/fs/proc/generic.c b/fs/proc/generic.c
| > index 1bdb624..3906770 100644
| > --- a/fs/proc/generic.c
| > +++ b/fs/proc/generic.c
| > @@ -561,28 +561,32 @@ 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,
| > diff --git a/fs/proc/internal.h b/fs/proc/internal.h
| > index 1820eb2..1b2b6c6 100644
| > --- a/fs/proc/internal.h
| > +++ b/fs/proc/internal.h
| > @@ -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;
| > diff --git a/fs/proc/root.c b/fs/proc/root.c
| > index ec9cb3b..1f86bb8 100644
| > --- a/fs/proc/root.c
| > +++ b/fs/proc/root.c
| > @@ -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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