vfs: take /proc/*/mounts and friends to fs/proc_namespace.c
rationale: that stuff is far tighter bound to fs/namespace.c than to the guts of procfs proper. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
3a2393d71d
commit
0226f4923f
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@ -19,6 +19,8 @@ else
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obj-y += no-block.o
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endif
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obj-$(CONFIG_PROC_FS) += proc_namespace.o
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obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o
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obj-y += notify/
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obj-$(CONFIG_EPOLL) += eventpoll.o
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24
fs/mount.h
24
fs/mount.h
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@ -1,4 +1,14 @@
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#include <linux/mount.h>
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#include <linux/seq_file.h>
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#include <linux/poll.h>
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struct mnt_namespace {
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atomic_t count;
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struct vfsmount * root;
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struct list_head list;
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wait_queue_head_t poll;
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int event;
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};
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struct mnt_pcp {
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int mnt_count;
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@ -49,3 +59,17 @@ static inline int mnt_has_parent(struct mount *mnt)
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}
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extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
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static inline void get_mnt_ns(struct mnt_namespace *ns)
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{
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atomic_inc(&ns->count);
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}
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struct proc_mounts {
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struct seq_file m; /* must be the first element */
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struct mnt_namespace *ns;
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struct path root;
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int (*show)(struct seq_file *, struct vfsmount *);
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};
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extern const struct seq_operations mounts_op;
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218
fs/namespace.c
218
fs/namespace.c
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@ -898,10 +898,10 @@ void replace_mount_options(struct super_block *sb, char *options)
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EXPORT_SYMBOL(replace_mount_options);
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#ifdef CONFIG_PROC_FS
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/* iterator */
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/* iterator; we want it to have access to namespace_sem, thus here... */
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static void *m_start(struct seq_file *m, loff_t *pos)
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{
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struct proc_mounts *p = m->private;
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struct proc_mounts *p = container_of(m, struct proc_mounts, m);
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down_read(&namespace_sem);
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return seq_list_start(&p->ns->list, *pos);
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@ -909,7 +909,7 @@ static void *m_start(struct seq_file *m, loff_t *pos)
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static void *m_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct proc_mounts *p = m->private;
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struct proc_mounts *p = container_of(m, struct proc_mounts, m);
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return seq_list_next(v, &p->ns->list, pos);
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}
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@ -919,222 +919,18 @@ static void m_stop(struct seq_file *m, void *v)
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up_read(&namespace_sem);
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}
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int mnt_had_events(struct proc_mounts *p)
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{
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struct mnt_namespace *ns = p->ns;
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int res = 0;
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br_read_lock(vfsmount_lock);
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if (p->m.poll_event != ns->event) {
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p->m.poll_event = ns->event;
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res = 1;
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}
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br_read_unlock(vfsmount_lock);
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return res;
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}
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struct proc_fs_info {
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int flag;
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const char *str;
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};
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static int show_sb_opts(struct seq_file *m, struct super_block *sb)
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{
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static const struct proc_fs_info fs_info[] = {
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{ MS_SYNCHRONOUS, ",sync" },
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{ MS_DIRSYNC, ",dirsync" },
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{ MS_MANDLOCK, ",mand" },
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{ 0, NULL }
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};
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const struct proc_fs_info *fs_infop;
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for (fs_infop = fs_info; fs_infop->flag; fs_infop++) {
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if (sb->s_flags & fs_infop->flag)
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seq_puts(m, fs_infop->str);
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}
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return security_sb_show_options(m, sb);
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}
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static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt)
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{
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static const struct proc_fs_info mnt_info[] = {
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{ MNT_NOSUID, ",nosuid" },
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{ MNT_NODEV, ",nodev" },
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{ MNT_NOEXEC, ",noexec" },
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{ MNT_NOATIME, ",noatime" },
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{ MNT_NODIRATIME, ",nodiratime" },
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{ MNT_RELATIME, ",relatime" },
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{ 0, NULL }
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};
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const struct proc_fs_info *fs_infop;
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for (fs_infop = mnt_info; fs_infop->flag; fs_infop++) {
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if (mnt->mnt_flags & fs_infop->flag)
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seq_puts(m, fs_infop->str);
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}
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}
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static void show_type(struct seq_file *m, struct super_block *sb)
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{
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mangle(m, sb->s_type->name);
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if (sb->s_subtype && sb->s_subtype[0]) {
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seq_putc(m, '.');
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mangle(m, sb->s_subtype);
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}
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}
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static int show_vfsmnt(struct seq_file *m, void *v)
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static int m_show(struct seq_file *m, void *v)
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{
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struct proc_mounts *p = container_of(m, struct proc_mounts, m);
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struct mount *r = list_entry(v, struct mount, mnt_list);
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struct vfsmount *mnt = &r->mnt;
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int err = 0;
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struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
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if (mnt->mnt_sb->s_op->show_devname) {
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err = mnt->mnt_sb->s_op->show_devname(m, mnt);
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if (err)
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goto out;
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} else {
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mangle(m, r->mnt_devname ? r->mnt_devname : "none");
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}
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seq_putc(m, ' ');
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seq_path(m, &mnt_path, " \t\n\\");
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seq_putc(m, ' ');
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show_type(m, mnt->mnt_sb);
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seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw");
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err = show_sb_opts(m, mnt->mnt_sb);
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if (err)
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goto out;
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show_mnt_opts(m, mnt);
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if (mnt->mnt_sb->s_op->show_options)
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err = mnt->mnt_sb->s_op->show_options(m, mnt);
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seq_puts(m, " 0 0\n");
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out:
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return err;
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return p->show(m, &r->mnt);
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}
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const struct seq_operations mounts_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_vfsmnt
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};
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static int show_mountinfo(struct seq_file *m, void *v)
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{
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struct proc_mounts *p = m->private;
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struct mount *r = list_entry(v, struct mount, mnt_list);
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struct vfsmount *mnt = &r->mnt;
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struct super_block *sb = mnt->mnt_sb;
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struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
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struct path root = p->root;
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int err = 0;
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seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id,
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MAJOR(sb->s_dev), MINOR(sb->s_dev));
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if (sb->s_op->show_path)
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err = sb->s_op->show_path(m, mnt);
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else
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seq_dentry(m, mnt->mnt_root, " \t\n\\");
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if (err)
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goto out;
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seq_putc(m, ' ');
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/* mountpoints outside of chroot jail will give SEQ_SKIP on this */
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err = seq_path_root(m, &mnt_path, &root, " \t\n\\");
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if (err)
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goto out;
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seq_puts(m, mnt->mnt_flags & MNT_READONLY ? " ro" : " rw");
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show_mnt_opts(m, mnt);
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/* Tagged fields ("foo:X" or "bar") */
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if (IS_MNT_SHARED(r))
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seq_printf(m, " shared:%i", r->mnt_group_id);
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if (IS_MNT_SLAVE(r)) {
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int master = r->mnt_master->mnt_group_id;
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int dom = get_dominating_id(r, &p->root);
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seq_printf(m, " master:%i", master);
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if (dom && dom != master)
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seq_printf(m, " propagate_from:%i", dom);
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}
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if (IS_MNT_UNBINDABLE(r))
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seq_puts(m, " unbindable");
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/* Filesystem specific data */
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seq_puts(m, " - ");
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show_type(m, sb);
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seq_putc(m, ' ');
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if (sb->s_op->show_devname)
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err = sb->s_op->show_devname(m, mnt);
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else
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mangle(m, r->mnt_devname ? r->mnt_devname : "none");
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if (err)
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goto out;
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seq_puts(m, sb->s_flags & MS_RDONLY ? " ro" : " rw");
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err = show_sb_opts(m, sb);
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if (err)
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goto out;
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if (sb->s_op->show_options)
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err = sb->s_op->show_options(m, mnt);
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seq_putc(m, '\n');
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out:
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return err;
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}
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const struct seq_operations mountinfo_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_mountinfo,
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};
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static int show_vfsstat(struct seq_file *m, void *v)
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{
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struct mount *r = list_entry(v, struct mount, mnt_list);
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struct vfsmount *mnt = &r->mnt;
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struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
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int err = 0;
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/* device */
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if (mnt->mnt_sb->s_op->show_devname) {
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seq_puts(m, "device ");
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err = mnt->mnt_sb->s_op->show_devname(m, mnt);
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} else {
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if (r->mnt_devname) {
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seq_puts(m, "device ");
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mangle(m, r->mnt_devname);
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} else
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seq_puts(m, "no device");
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}
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/* mount point */
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seq_puts(m, " mounted on ");
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seq_path(m, &mnt_path, " \t\n\\");
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seq_putc(m, ' ');
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/* file system type */
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seq_puts(m, "with fstype ");
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show_type(m, mnt->mnt_sb);
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/* optional statistics */
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if (mnt->mnt_sb->s_op->show_stats) {
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seq_putc(m, ' ');
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if (!err)
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err = mnt->mnt_sb->s_op->show_stats(m, mnt);
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}
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seq_putc(m, '\n');
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return err;
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}
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const struct seq_operations mountstats_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_vfsstat,
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.show = m_show,
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};
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#endif /* CONFIG_PROC_FS */
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114
fs/proc/base.c
114
fs/proc/base.c
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@ -631,120 +631,6 @@ static const struct inode_operations proc_def_inode_operations = {
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.setattr = proc_setattr,
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};
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static int mounts_open_common(struct inode *inode, struct file *file,
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const struct seq_operations *op)
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{
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struct task_struct *task = get_proc_task(inode);
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struct nsproxy *nsp;
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struct mnt_namespace *ns = NULL;
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struct path root;
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struct proc_mounts *p;
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int ret = -EINVAL;
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if (task) {
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rcu_read_lock();
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nsp = task_nsproxy(task);
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if (nsp) {
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ns = nsp->mnt_ns;
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if (ns)
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get_mnt_ns(ns);
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}
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rcu_read_unlock();
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if (ns && get_task_root(task, &root) == 0)
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ret = 0;
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put_task_struct(task);
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}
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if (!ns)
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goto err;
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if (ret)
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goto err_put_ns;
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ret = -ENOMEM;
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p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL);
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if (!p)
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goto err_put_path;
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file->private_data = &p->m;
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ret = seq_open(file, op);
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if (ret)
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goto err_free;
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p->m.private = p;
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p->ns = ns;
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p->root = root;
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p->m.poll_event = ns->event;
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return 0;
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err_free:
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kfree(p);
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err_put_path:
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path_put(&root);
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err_put_ns:
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put_mnt_ns(ns);
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err:
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return ret;
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}
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static int mounts_release(struct inode *inode, struct file *file)
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{
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struct proc_mounts *p = file->private_data;
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path_put(&p->root);
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put_mnt_ns(p->ns);
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return seq_release(inode, file);
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}
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static unsigned mounts_poll(struct file *file, poll_table *wait)
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{
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struct proc_mounts *p = file->private_data;
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unsigned res = POLLIN | POLLRDNORM;
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poll_wait(file, &p->ns->poll, wait);
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if (mnt_had_events(p))
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res |= POLLERR | POLLPRI;
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return res;
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}
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static int mounts_open(struct inode *inode, struct file *file)
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{
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return mounts_open_common(inode, file, &mounts_op);
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}
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static const struct file_operations proc_mounts_operations = {
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.open = mounts_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = mounts_release,
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.poll = mounts_poll,
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};
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static int mountinfo_open(struct inode *inode, struct file *file)
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{
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return mounts_open_common(inode, file, &mountinfo_op);
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}
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static const struct file_operations proc_mountinfo_operations = {
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.open = mountinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = mounts_release,
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.poll = mounts_poll,
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};
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|
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static int mountstats_open(struct inode *inode, struct file *file)
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{
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return mounts_open_common(inode, file, &mountstats_op);
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}
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|
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static const struct file_operations proc_mountstats_operations = {
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.open = mountstats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = mounts_release,
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};
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#define PROC_BLOCK_SIZE (3*1024) /* 4K page size but our output routines use some slack for overruns */
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static ssize_t proc_info_read(struct file * file, char __user * buf,
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|
|
|
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|
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@ -0,0 +1,331 @@
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/*
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* fs/proc_namespace.c - handling of /proc/<pid>/{mounts,mountinfo,mountstats}
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*
|
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* In fact, that's a piece of procfs; it's *almost* isolated from
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* the rest of fs/proc, but has rather close relationships with
|
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* fs/namespace.c, thus here instead of fs/proc
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*
|
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*/
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#include <linux/mnt_namespace.h>
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#include <linux/nsproxy.h>
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#include <linux/security.h>
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#include <linux/fs_struct.h>
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#include "proc/internal.h" /* only for get_proc_task() in ->open() */
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|
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#include "pnode.h"
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#include "internal.h"
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|
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static unsigned mounts_poll(struct file *file, poll_table *wait)
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{
|
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struct proc_mounts *p = file->private_data;
|
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struct mnt_namespace *ns = p->ns;
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unsigned res = POLLIN | POLLRDNORM;
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|
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poll_wait(file, &p->ns->poll, wait);
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|
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br_read_lock(vfsmount_lock);
|
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if (p->m.poll_event != ns->event) {
|
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p->m.poll_event = ns->event;
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res |= POLLERR | POLLPRI;
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}
|
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br_read_unlock(vfsmount_lock);
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|
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return res;
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}
|
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|
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struct proc_fs_info {
|
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int flag;
|
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const char *str;
|
||||
};
|
||||
|
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static int show_sb_opts(struct seq_file *m, struct super_block *sb)
|
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{
|
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static const struct proc_fs_info fs_info[] = {
|
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{ MS_SYNCHRONOUS, ",sync" },
|
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{ MS_DIRSYNC, ",dirsync" },
|
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{ MS_MANDLOCK, ",mand" },
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{ 0, NULL }
|
||||
};
|
||||
const struct proc_fs_info *fs_infop;
|
||||
|
||||
for (fs_infop = fs_info; fs_infop->flag; fs_infop++) {
|
||||
if (sb->s_flags & fs_infop->flag)
|
||||
seq_puts(m, fs_infop->str);
|
||||
}
|
||||
|
||||
return security_sb_show_options(m, sb);
|
||||
}
|
||||
|
||||
static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt)
|
||||
{
|
||||
static const struct proc_fs_info mnt_info[] = {
|
||||
{ MNT_NOSUID, ",nosuid" },
|
||||
{ MNT_NODEV, ",nodev" },
|
||||
{ MNT_NOEXEC, ",noexec" },
|
||||
{ MNT_NOATIME, ",noatime" },
|
||||
{ MNT_NODIRATIME, ",nodiratime" },
|
||||
{ MNT_RELATIME, ",relatime" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
const struct proc_fs_info *fs_infop;
|
||||
|
||||
for (fs_infop = mnt_info; fs_infop->flag; fs_infop++) {
|
||||
if (mnt->mnt_flags & fs_infop->flag)
|
||||
seq_puts(m, fs_infop->str);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void mangle(struct seq_file *m, const char *s)
|
||||
{
|
||||
seq_escape(m, s, " \t\n\\");
|
||||
}
|
||||
|
||||
static void show_type(struct seq_file *m, struct super_block *sb)
|
||||
{
|
||||
mangle(m, sb->s_type->name);
|
||||
if (sb->s_subtype && sb->s_subtype[0]) {
|
||||
seq_putc(m, '.');
|
||||
mangle(m, sb->s_subtype);
|
||||
}
|
||||
}
|
||||
|
||||
static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt)
|
||||
{
|
||||
struct mount *r = real_mount(mnt);
|
||||
int err = 0;
|
||||
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
|
||||
|
||||
if (mnt->mnt_sb->s_op->show_devname) {
|
||||
err = mnt->mnt_sb->s_op->show_devname(m, mnt);
|
||||
if (err)
|
||||
goto out;
|
||||
} else {
|
||||
mangle(m, r->mnt_devname ? r->mnt_devname : "none");
|
||||
}
|
||||
seq_putc(m, ' ');
|
||||
seq_path(m, &mnt_path, " \t\n\\");
|
||||
seq_putc(m, ' ');
|
||||
show_type(m, mnt->mnt_sb);
|
||||
seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw");
|
||||
err = show_sb_opts(m, mnt->mnt_sb);
|
||||
if (err)
|
||||
goto out;
|
||||
show_mnt_opts(m, mnt);
|
||||
if (mnt->mnt_sb->s_op->show_options)
|
||||
err = mnt->mnt_sb->s_op->show_options(m, mnt);
|
||||
seq_puts(m, " 0 0\n");
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
|
||||
{
|
||||
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 };
|
||||
struct path root = p->root;
|
||||
int err = 0;
|
||||
|
||||
seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id,
|
||||
MAJOR(sb->s_dev), MINOR(sb->s_dev));
|
||||
if (sb->s_op->show_path)
|
||||
err = sb->s_op->show_path(m, mnt);
|
||||
else
|
||||
seq_dentry(m, mnt->mnt_root, " \t\n\\");
|
||||
if (err)
|
||||
goto out;
|
||||
seq_putc(m, ' ');
|
||||
|
||||
/* mountpoints outside of chroot jail will give SEQ_SKIP on this */
|
||||
err = seq_path_root(m, &mnt_path, &root, " \t\n\\");
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
seq_puts(m, mnt->mnt_flags & MNT_READONLY ? " ro" : " rw");
|
||||
show_mnt_opts(m, mnt);
|
||||
|
||||
/* Tagged fields ("foo:X" or "bar") */
|
||||
if (IS_MNT_SHARED(r))
|
||||
seq_printf(m, " shared:%i", r->mnt_group_id);
|
||||
if (IS_MNT_SLAVE(r)) {
|
||||
int master = r->mnt_master->mnt_group_id;
|
||||
int dom = get_dominating_id(r, &p->root);
|
||||
seq_printf(m, " master:%i", master);
|
||||
if (dom && dom != master)
|
||||
seq_printf(m, " propagate_from:%i", dom);
|
||||
}
|
||||
if (IS_MNT_UNBINDABLE(r))
|
||||
seq_puts(m, " unbindable");
|
||||
|
||||
/* Filesystem specific data */
|
||||
seq_puts(m, " - ");
|
||||
show_type(m, sb);
|
||||
seq_putc(m, ' ');
|
||||
if (sb->s_op->show_devname)
|
||||
err = sb->s_op->show_devname(m, mnt);
|
||||
else
|
||||
mangle(m, r->mnt_devname ? r->mnt_devname : "none");
|
||||
if (err)
|
||||
goto out;
|
||||
seq_puts(m, sb->s_flags & MS_RDONLY ? " ro" : " rw");
|
||||
err = show_sb_opts(m, sb);
|
||||
if (err)
|
||||
goto out;
|
||||
if (sb->s_op->show_options)
|
||||
err = sb->s_op->show_options(m, mnt);
|
||||
seq_putc(m, '\n');
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
|
||||
{
|
||||
struct mount *r = real_mount(mnt);
|
||||
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
|
||||
int err = 0;
|
||||
|
||||
/* device */
|
||||
if (mnt->mnt_sb->s_op->show_devname) {
|
||||
seq_puts(m, "device ");
|
||||
err = mnt->mnt_sb->s_op->show_devname(m, mnt);
|
||||
} else {
|
||||
if (r->mnt_devname) {
|
||||
seq_puts(m, "device ");
|
||||
mangle(m, r->mnt_devname);
|
||||
} else
|
||||
seq_puts(m, "no device");
|
||||
}
|
||||
|
||||
/* mount point */
|
||||
seq_puts(m, " mounted on ");
|
||||
seq_path(m, &mnt_path, " \t\n\\");
|
||||
seq_putc(m, ' ');
|
||||
|
||||
/* file system type */
|
||||
seq_puts(m, "with fstype ");
|
||||
show_type(m, mnt->mnt_sb);
|
||||
|
||||
/* optional statistics */
|
||||
if (mnt->mnt_sb->s_op->show_stats) {
|
||||
seq_putc(m, ' ');
|
||||
if (!err)
|
||||
err = mnt->mnt_sb->s_op->show_stats(m, mnt);
|
||||
}
|
||||
|
||||
seq_putc(m, '\n');
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mounts_open_common(struct inode *inode, struct file *file,
|
||||
int (*show)(struct seq_file *, struct vfsmount *))
|
||||
{
|
||||
struct task_struct *task = get_proc_task(inode);
|
||||
struct nsproxy *nsp;
|
||||
struct mnt_namespace *ns = NULL;
|
||||
struct path root;
|
||||
struct proc_mounts *p;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (!task)
|
||||
goto err;
|
||||
|
||||
rcu_read_lock();
|
||||
nsp = task_nsproxy(task);
|
||||
if (!nsp) {
|
||||
rcu_read_unlock();
|
||||
put_task_struct(task);
|
||||
goto err;
|
||||
}
|
||||
ns = nsp->mnt_ns;
|
||||
if (!ns) {
|
||||
rcu_read_unlock();
|
||||
put_task_struct(task);
|
||||
goto err;
|
||||
}
|
||||
get_mnt_ns(ns);
|
||||
rcu_read_unlock();
|
||||
task_lock(task);
|
||||
if (!task->fs) {
|
||||
task_unlock(task);
|
||||
put_task_struct(task);
|
||||
ret = -ENOENT;
|
||||
goto err_put_ns;
|
||||
}
|
||||
get_fs_root(task->fs, &root);
|
||||
task_unlock(task);
|
||||
put_task_struct(task);
|
||||
|
||||
ret = -ENOMEM;
|
||||
p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL);
|
||||
if (!p)
|
||||
goto err_put_path;
|
||||
|
||||
file->private_data = &p->m;
|
||||
ret = seq_open(file, &mounts_op);
|
||||
if (ret)
|
||||
goto err_free;
|
||||
|
||||
p->m.private = p;
|
||||
p->ns = ns;
|
||||
p->root = root;
|
||||
p->m.poll_event = ns->event;
|
||||
p->show = show;
|
||||
|
||||
return 0;
|
||||
|
||||
err_free:
|
||||
kfree(p);
|
||||
err_put_path:
|
||||
path_put(&root);
|
||||
err_put_ns:
|
||||
put_mnt_ns(ns);
|
||||
err:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mounts_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct proc_mounts *p = file->private_data;
|
||||
path_put(&p->root);
|
||||
put_mnt_ns(p->ns);
|
||||
return seq_release(inode, file);
|
||||
}
|
||||
|
||||
static int mounts_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return mounts_open_common(inode, file, show_vfsmnt);
|
||||
}
|
||||
|
||||
static int mountinfo_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return mounts_open_common(inode, file, show_mountinfo);
|
||||
}
|
||||
|
||||
static int mountstats_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return mounts_open_common(inode, file, show_vfsstat);
|
||||
}
|
||||
|
||||
const struct file_operations proc_mounts_operations = {
|
||||
.open = mounts_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = mounts_release,
|
||||
.poll = mounts_poll,
|
||||
};
|
||||
|
||||
const struct file_operations proc_mountinfo_operations = {
|
||||
.open = mountinfo_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = mounts_release,
|
||||
.poll = mounts_poll,
|
||||
};
|
||||
|
||||
const struct file_operations proc_mountstats_operations = {
|
||||
.open = mountstats_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = mounts_release,
|
||||
};
|
||||
|
|
@ -2,38 +2,16 @@
|
|||
#define _NAMESPACE_H_
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#include <linux/path.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/wait.h>
|
||||
|
||||
struct mnt_namespace {
|
||||
atomic_t count;
|
||||
struct vfsmount * root;
|
||||
struct list_head list;
|
||||
wait_queue_head_t poll;
|
||||
int event;
|
||||
};
|
||||
|
||||
struct proc_mounts {
|
||||
struct seq_file m; /* must be the first element */
|
||||
struct mnt_namespace *ns;
|
||||
struct path root;
|
||||
};
|
||||
|
||||
struct mnt_namespace;
|
||||
struct fs_struct;
|
||||
|
||||
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
|
||||
struct fs_struct *);
|
||||
extern void put_mnt_ns(struct mnt_namespace *ns);
|
||||
static inline void get_mnt_ns(struct mnt_namespace *ns)
|
||||
{
|
||||
atomic_inc(&ns->count);
|
||||
}
|
||||
|
||||
extern const struct seq_operations mounts_op;
|
||||
extern const struct seq_operations mountinfo_op;
|
||||
extern const struct seq_operations mountstats_op;
|
||||
extern int mnt_had_events(struct proc_mounts *);
|
||||
extern const struct file_operations proc_mounts_operations;
|
||||
extern const struct file_operations proc_mountinfo_operations;
|
||||
extern const struct file_operations proc_mountstats_operations;
|
||||
|
||||
#endif
|
||||
#endif
|
||||
|
|
|
|||
Reference in New Issue