diff options
Diffstat (limited to 'fs/proc/base.c')
-rw-r--r-- | fs/proc/base.c | 116 |
1 files changed, 1 insertions, 115 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 851ba3dcdc29..a1dddda999f2 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c | |||
@@ -101,7 +101,7 @@ | |||
101 | struct pid_entry { | 101 | struct pid_entry { |
102 | char *name; | 102 | char *name; |
103 | int len; | 103 | int len; |
104 | mode_t mode; | 104 | umode_t mode; |
105 | const struct inode_operations *iop; | 105 | const struct inode_operations *iop; |
106 | const struct file_operations *fop; | 106 | const struct file_operations *fop; |
107 | union proc_op op; | 107 | union proc_op op; |
@@ -631,120 +631,6 @@ static const struct inode_operations proc_def_inode_operations = { | |||
631 | .setattr = proc_setattr, | 631 | .setattr = proc_setattr, |
632 | }; | 632 | }; |
633 | 633 | ||
634 | static int mounts_open_common(struct inode *inode, struct file *file, | ||
635 | const struct seq_operations *op) | ||
636 | { | ||
637 | struct task_struct *task = get_proc_task(inode); | ||
638 | struct nsproxy *nsp; | ||
639 | struct mnt_namespace *ns = NULL; | ||
640 | struct path root; | ||
641 | struct proc_mounts *p; | ||
642 | int ret = -EINVAL; | ||
643 | |||
644 | if (task) { | ||
645 | rcu_read_lock(); | ||
646 | nsp = task_nsproxy(task); | ||
647 | if (nsp) { | ||
648 | ns = nsp->mnt_ns; | ||
649 | if (ns) | ||
650 | get_mnt_ns(ns); | ||
651 | } | ||
652 | rcu_read_unlock(); | ||
653 | if (ns && get_task_root(task, &root) == 0) | ||
654 | ret = 0; | ||
655 | put_task_struct(task); | ||
656 | } | ||
657 | |||
658 | if (!ns) | ||
659 | goto err; | ||
660 | if (ret) | ||
661 | goto err_put_ns; | ||
662 | |||
663 | ret = -ENOMEM; | ||
664 | p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL); | ||
665 | if (!p) | ||
666 | goto err_put_path; | ||
667 | |||
668 | file->private_data = &p->m; | ||
669 | ret = seq_open(file, op); | ||
670 | if (ret) | ||
671 | goto err_free; | ||
672 | |||
673 | p->m.private = p; | ||
674 | p->ns = ns; | ||
675 | p->root = root; | ||
676 | p->m.poll_event = ns->event; | ||
677 | |||
678 | return 0; | ||
679 | |||
680 | err_free: | ||
681 | kfree(p); | ||
682 | err_put_path: | ||
683 | path_put(&root); | ||
684 | err_put_ns: | ||
685 | put_mnt_ns(ns); | ||
686 | err: | ||
687 | return ret; | ||
688 | } | ||
689 | |||
690 | static int mounts_release(struct inode *inode, struct file *file) | ||
691 | { | ||
692 | struct proc_mounts *p = file->private_data; | ||
693 | path_put(&p->root); | ||
694 | put_mnt_ns(p->ns); | ||
695 | return seq_release(inode, file); | ||
696 | } | ||
697 | |||
698 | static unsigned mounts_poll(struct file *file, poll_table *wait) | ||
699 | { | ||
700 | struct proc_mounts *p = file->private_data; | ||
701 | unsigned res = POLLIN | POLLRDNORM; | ||
702 | |||
703 | poll_wait(file, &p->ns->poll, wait); | ||
704 | if (mnt_had_events(p)) | ||
705 | res |= POLLERR | POLLPRI; | ||
706 | |||
707 | return res; | ||
708 | } | ||
709 | |||
710 | static int mounts_open(struct inode *inode, struct file *file) | ||
711 | { | ||
712 | return mounts_open_common(inode, file, &mounts_op); | ||
713 | } | ||
714 | |||
715 | static const struct file_operations proc_mounts_operations = { | ||
716 | .open = mounts_open, | ||
717 | .read = seq_read, | ||
718 | .llseek = seq_lseek, | ||
719 | .release = mounts_release, | ||
720 | .poll = mounts_poll, | ||
721 | }; | ||
722 | |||
723 | static int mountinfo_open(struct inode *inode, struct file *file) | ||
724 | { | ||
725 | return mounts_open_common(inode, file, &mountinfo_op); | ||
726 | } | ||
727 | |||
728 | static const struct file_operations proc_mountinfo_operations = { | ||
729 | .open = mountinfo_open, | ||
730 | .read = seq_read, | ||
731 | .llseek = seq_lseek, | ||
732 | .release = mounts_release, | ||
733 | .poll = mounts_poll, | ||
734 | }; | ||
735 | |||
736 | static int mountstats_open(struct inode *inode, struct file *file) | ||
737 | { | ||
738 | return mounts_open_common(inode, file, &mountstats_op); | ||
739 | } | ||
740 | |||
741 | static const struct file_operations proc_mountstats_operations = { | ||
742 | .open = mountstats_open, | ||
743 | .read = seq_read, | ||
744 | .llseek = seq_lseek, | ||
745 | .release = mounts_release, | ||
746 | }; | ||
747 | |||
748 | #define PROC_BLOCK_SIZE (3*1024) /* 4K page size but our output routines use some slack for overruns */ | 634 | #define PROC_BLOCK_SIZE (3*1024) /* 4K page size but our output routines use some slack for overruns */ |
749 | 635 | ||
750 | static ssize_t proc_info_read(struct file * file, char __user * buf, | 636 | static ssize_t proc_info_read(struct file * file, char __user * buf, |