mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 12:20:52 +07:00
dfeef68862
If .readlink == NULL implies generic_readlink(). Generated by: to_del="\.readlink.*=.*generic_readlink" for i in `git grep -l $to_del`; do sed -i "/$to_del"/d $i; done Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pid_namespace.h>
|
|
#include "internal.h"
|
|
|
|
/*
|
|
* /proc/thread_self:
|
|
*/
|
|
static const char *proc_thread_self_get_link(struct dentry *dentry,
|
|
struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
struct pid_namespace *ns = inode->i_sb->s_fs_info;
|
|
pid_t tgid = task_tgid_nr_ns(current, ns);
|
|
pid_t pid = task_pid_nr_ns(current, ns);
|
|
char *name;
|
|
|
|
if (!pid)
|
|
return ERR_PTR(-ENOENT);
|
|
name = kmalloc(PROC_NUMBUF + 6 + PROC_NUMBUF,
|
|
dentry ? GFP_KERNEL : GFP_ATOMIC);
|
|
if (unlikely(!name))
|
|
return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD);
|
|
sprintf(name, "%d/task/%d", tgid, pid);
|
|
set_delayed_call(done, kfree_link, name);
|
|
return name;
|
|
}
|
|
|
|
static const struct inode_operations proc_thread_self_inode_operations = {
|
|
.get_link = proc_thread_self_get_link,
|
|
};
|
|
|
|
static unsigned thread_self_inum;
|
|
|
|
int proc_setup_thread_self(struct super_block *s)
|
|
{
|
|
struct inode *root_inode = d_inode(s->s_root);
|
|
struct pid_namespace *ns = s->s_fs_info;
|
|
struct dentry *thread_self;
|
|
|
|
inode_lock(root_inode);
|
|
thread_self = d_alloc_name(s->s_root, "thread-self");
|
|
if (thread_self) {
|
|
struct inode *inode = new_inode_pseudo(s);
|
|
if (inode) {
|
|
inode->i_ino = thread_self_inum;
|
|
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
|
|
inode->i_mode = S_IFLNK | S_IRWXUGO;
|
|
inode->i_uid = GLOBAL_ROOT_UID;
|
|
inode->i_gid = GLOBAL_ROOT_GID;
|
|
inode->i_op = &proc_thread_self_inode_operations;
|
|
d_add(thread_self, inode);
|
|
} else {
|
|
dput(thread_self);
|
|
thread_self = ERR_PTR(-ENOMEM);
|
|
}
|
|
} else {
|
|
thread_self = ERR_PTR(-ENOMEM);
|
|
}
|
|
inode_unlock(root_inode);
|
|
if (IS_ERR(thread_self)) {
|
|
pr_err("proc_fill_super: can't allocate /proc/thread_self\n");
|
|
return PTR_ERR(thread_self);
|
|
}
|
|
ns->proc_thread_self = thread_self;
|
|
return 0;
|
|
}
|
|
|
|
void __init proc_thread_self_init(void)
|
|
{
|
|
proc_alloc_inum(&thread_self_inum);
|
|
}
|