From e1a1c997afe907e6ec4799e4be0f38cffd8b418c Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 14 Nov 2007 16:59:08 -0800 Subject: [PATCH] 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: Eric W. Biederman Acked-by: Pavel Emelyanov Cc: Alexey Dobriyan Acked-by: Sukadev Bhattiprolu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/proc/generic.c | 37 +++++++++++++++++++++---------------- fs/proc/internal.h | 2 ++ fs/proc/root.c | 2 +- 3 files changed, 24 insertions(+), 17 deletions(-) diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 1bdb62435758..a9806bc21ec3 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -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; + 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); + 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 1820eb2ef762..1b2b6c6bb475 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 ec9cb3b6c93b..1f86bb860e04 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,