From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/proc_namespace.c | 38 ++++++++++++++++++++------------------
1 files changed, 20 insertions(+), 18 deletions(-)
diff --git a/kernel/fs/proc_namespace.c b/kernel/fs/proc_namespace.c
index bd07f0f..eafb757 100644
--- a/kernel/fs/proc_namespace.c
+++ b/kernel/fs/proc_namespace.c
@@ -37,23 +37,23 @@
return res;
}
-struct proc_fs_info {
+struct proc_fs_opts {
int flag;
const char *str;
};
static int show_sb_opts(struct seq_file *m, struct super_block *sb)
{
- static const struct proc_fs_info fs_info[] = {
+ static const struct proc_fs_opts fs_opts[] = {
{ SB_SYNCHRONOUS, ",sync" },
{ SB_DIRSYNC, ",dirsync" },
{ SB_MANDLOCK, ",mand" },
{ SB_LAZYTIME, ",lazytime" },
{ 0, NULL }
};
- const struct proc_fs_info *fs_infop;
+ const struct proc_fs_opts *fs_infop;
- for (fs_infop = fs_info; fs_infop->flag; fs_infop++) {
+ for (fs_infop = fs_opts; fs_infop->flag; fs_infop++) {
if (sb->s_flags & fs_infop->flag)
seq_puts(m, fs_infop->str);
}
@@ -63,18 +63,19 @@
static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt)
{
- static const struct proc_fs_info mnt_info[] = {
+ static const struct proc_fs_opts mnt_opts[] = {
{ MNT_NOSUID, ",nosuid" },
{ MNT_NODEV, ",nodev" },
{ MNT_NOEXEC, ",noexec" },
{ MNT_NOATIME, ",noatime" },
{ MNT_NODIRATIME, ",nodiratime" },
{ MNT_RELATIME, ",relatime" },
+ { MNT_NOSYMFOLLOW, ",nosymfollow" },
{ 0, NULL }
};
- const struct proc_fs_info *fs_infop;
+ const struct proc_fs_opts *fs_infop;
- for (fs_infop = mnt_info; fs_infop->flag; fs_infop++) {
+ for (fs_infop = mnt_opts; fs_infop->flag; fs_infop++) {
if (mnt->mnt_flags & fs_infop->flag)
seq_puts(m, fs_infop->str);
}
@@ -88,7 +89,7 @@
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]) {
+ if (sb->s_subtype) {
seq_putc(m, '.');
mangle(m, sb->s_subtype);
}
@@ -121,9 +122,7 @@
if (err)
goto out;
show_mnt_opts(m, mnt);
- if (sb->s_op->show_options2)
- err = sb->s_op->show_options2(mnt, m, mnt_path.dentry);
- else if (sb->s_op->show_options)
+ if (sb->s_op->show_options)
err = sb->s_op->show_options(m, mnt_path.dentry);
seq_puts(m, " 0 0\n");
out:
@@ -185,9 +184,7 @@
err = show_sb_opts(m, sb);
if (err)
goto out;
- if (sb->s_op->show_options2) {
- err = sb->s_op->show_options2(mnt, m, mnt->mnt_root);
- } else if (sb->s_op->show_options)
+ if (sb->s_op->show_options)
err = sb->s_op->show_options(m, mnt->mnt_root);
seq_putc(m, '\n');
out:
@@ -283,7 +280,8 @@
p->ns = ns;
p->root = root;
p->show = show;
- p->cached_event = ~0ULL;
+ INIT_LIST_HEAD(&p->cursor.mnt_list);
+ p->cursor.mnt.mnt_flags = MNT_CURSOR;
return 0;
@@ -300,6 +298,7 @@
struct seq_file *m = file->private_data;
struct proc_mounts *p = m->private;
path_put(&p->root);
+ mnt_cursor_del(p->ns, &p->cursor);
put_mnt_ns(p->ns);
return seq_release_private(inode, file);
}
@@ -321,7 +320,8 @@
const struct file_operations proc_mounts_operations = {
.open = mounts_open,
- .read = seq_read,
+ .read_iter = seq_read_iter,
+ .splice_read = generic_file_splice_read,
.llseek = seq_lseek,
.release = mounts_release,
.poll = mounts_poll,
@@ -329,7 +329,8 @@
const struct file_operations proc_mountinfo_operations = {
.open = mountinfo_open,
- .read = seq_read,
+ .read_iter = seq_read_iter,
+ .splice_read = generic_file_splice_read,
.llseek = seq_lseek,
.release = mounts_release,
.poll = mounts_poll,
@@ -337,7 +338,8 @@
const struct file_operations proc_mountstats_operations = {
.open = mountstats_open,
- .read = seq_read,
+ .read_iter = seq_read_iter,
+ .splice_read = generic_file_splice_read,
.llseek = seq_lseek,
.release = mounts_release,
};
--
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