diff options
Diffstat (limited to 'fs/proc_namespace.c')
| -rw-r--r-- | fs/proc_namespace.c | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c index 8db932da4009..8ebd9a334085 100644 --- a/fs/proc_namespace.c +++ b/fs/proc_namespace.c @@ -17,7 +17,8 @@ static unsigned mounts_poll(struct file *file, poll_table *wait) { - struct proc_mounts *p = proc_mounts(file->private_data); + struct seq_file *m = file->private_data; + struct proc_mounts *p = m->private; struct mnt_namespace *ns = p->ns; unsigned res = POLLIN | POLLRDNORM; int event; @@ -25,8 +26,8 @@ static unsigned mounts_poll(struct file *file, poll_table *wait) poll_wait(file, &p->ns->poll, wait); event = ACCESS_ONCE(ns->event); - if (p->m.poll_event != event) { - p->m.poll_event = event; + if (m->poll_event != event) { + m->poll_event = event; res |= POLLERR | POLLPRI; } @@ -92,7 +93,7 @@ static void show_type(struct seq_file *m, struct super_block *sb) static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt) { - struct proc_mounts *p = proc_mounts(m); + struct proc_mounts *p = m->private; struct mount *r = real_mount(mnt); int err = 0; struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt }; @@ -126,7 +127,7 @@ out: static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt) { - struct proc_mounts *p = proc_mounts(m); + struct proc_mounts *p = m->private; struct mount *r = real_mount(mnt); struct super_block *sb = mnt->mnt_sb; struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt }; @@ -186,7 +187,7 @@ out: static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt) { - struct proc_mounts *p = proc_mounts(m); + struct proc_mounts *p = m->private; struct mount *r = real_mount(mnt); struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt }; struct super_block *sb = mnt_path.dentry->d_sb; @@ -236,6 +237,7 @@ static int mounts_open_common(struct inode *inode, struct file *file, struct mnt_namespace *ns = NULL; struct path root; struct proc_mounts *p; + struct seq_file *m; int ret = -EINVAL; if (!task) @@ -260,26 +262,21 @@ static int mounts_open_common(struct inode *inode, struct file *file, task_unlock(task); put_task_struct(task); - ret = -ENOMEM; - p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL); - if (!p) + ret = seq_open_private(file, &mounts_op, sizeof(struct proc_mounts)); + if (ret) goto err_put_path; - file->private_data = &p->m; - ret = seq_open(file, &mounts_op); - if (ret) - goto err_free; + m = file->private_data; + m->poll_event = ns->event; + p = m->private; p->ns = ns; p->root = root; - p->m.poll_event = ns->event; p->show = show; p->cached_event = ~0ULL; return 0; - err_free: - kfree(p); err_put_path: path_put(&root); err_put_ns: @@ -290,10 +287,11 @@ static int mounts_open_common(struct inode *inode, struct file *file, static int mounts_release(struct inode *inode, struct file *file) { - struct proc_mounts *p = proc_mounts(file->private_data); + struct seq_file *m = file->private_data; + struct proc_mounts *p = m->private; path_put(&p->root); put_mnt_ns(p->ns); - return seq_release(inode, file); + return seq_release_private(inode, file); } static int mounts_open(struct inode *inode, struct file *file) |