diff options
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 71 |
1 files changed, 61 insertions, 10 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index c59852b..a0c4ba6 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -121,6 +121,10 @@ struct pid_entry { NOD(NAME, (S_IFREG|(MODE)), \ NULL, &proc_info_file_operations, \ { .proc_read = &proc_##OTYPE } ) +#define ONE(NAME, MODE, OTYPE) \ + NOD(NAME, (S_IFREG|(MODE)), \ + NULL, &proc_single_file_operations, \ + { .proc_show = &proc_##OTYPE } ) int maps_protect; EXPORT_SYMBOL(maps_protect); @@ -502,7 +506,7 @@ static const struct inode_operations proc_def_inode_operations = { .setattr = proc_setattr, }; -extern struct seq_operations mounts_op; +extern const struct seq_operations mounts_op; struct proc_mounts { struct seq_file m; int event; @@ -581,7 +585,7 @@ static const struct file_operations proc_mounts_operations = { .poll = mounts_poll, }; -extern struct seq_operations mountstats_op; +extern const struct seq_operations mountstats_op; static int mountstats_open(struct inode *inode, struct file *file) { int ret = seq_open(file, &mountstats_op); @@ -658,6 +662,45 @@ static const struct file_operations proc_info_file_operations = { .read = proc_info_read, }; +static int proc_single_show(struct seq_file *m, void *v) +{ + struct inode *inode = m->private; + struct pid_namespace *ns; + struct pid *pid; + struct task_struct *task; + int ret; + + ns = inode->i_sb->s_fs_info; + pid = proc_pid(inode); + task = get_pid_task(pid, PIDTYPE_PID); + if (!task) + return -ESRCH; + + ret = PROC_I(inode)->op.proc_show(m, ns, pid, task); + + put_task_struct(task); + return ret; +} + +static int proc_single_open(struct inode *inode, struct file *filp) +{ + int ret; + ret = single_open(filp, proc_single_show, NULL); + if (!ret) { + struct seq_file *m = filp->private_data; + + m->private = inode; + } + return ret; +} + +static const struct file_operations proc_single_file_operations = { + .open = proc_single_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int mem_open(struct inode* inode, struct file* file) { file->private_data = (void*)((long)current->self_exec_id); @@ -2058,15 +2101,23 @@ static const struct file_operations proc_coredump_filter_operations = { static int proc_self_readlink(struct dentry *dentry, char __user *buffer, int buflen) { + struct pid_namespace *ns = dentry->d_sb->s_fs_info; + pid_t pid = task_pid_nr_ns(current, ns); char tmp[PROC_NUMBUF]; - sprintf(tmp, "%d", task_tgid_vnr(current)); + if (!pid) + return -ENOENT; + sprintf(tmp, "%d", pid); return vfs_readlink(dentry,buffer,buflen,tmp); } static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) { + struct pid_namespace *ns = dentry->d_sb->s_fs_info; + pid_t pid = task_pid_nr_ns(current, ns); char tmp[PROC_NUMBUF]; - sprintf(tmp, "%d", task_tgid_vnr(current)); + if (!pid) + return ERR_PTR(-ENOENT); + sprintf(tmp, "%d", pid); return ERR_PTR(vfs_follow_link(nd,tmp)); } @@ -2231,14 +2282,14 @@ static const struct pid_entry tgid_base_stuff[] = { DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo), REG("environ", S_IRUSR, environ), INF("auxv", S_IRUSR, pid_auxv), - INF("status", S_IRUGO, pid_status), + ONE("status", S_IRUGO, pid_status), INF("limits", S_IRUSR, pid_limits), #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, pid_sched), #endif INF("cmdline", S_IRUGO, pid_cmdline), - INF("stat", S_IRUGO, tgid_stat), - INF("statm", S_IRUGO, pid_statm), + ONE("stat", S_IRUGO, tgid_stat), + ONE("statm", S_IRUGO, pid_statm), REG("maps", S_IRUGO, maps), #ifdef CONFIG_NUMA REG("numa_maps", S_IRUGO, numa_maps), @@ -2562,14 +2613,14 @@ static const struct pid_entry tid_base_stuff[] = { DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo), REG("environ", S_IRUSR, environ), INF("auxv", S_IRUSR, pid_auxv), - INF("status", S_IRUGO, pid_status), + ONE("status", S_IRUGO, pid_status), INF("limits", S_IRUSR, pid_limits), #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, pid_sched), #endif INF("cmdline", S_IRUGO, pid_cmdline), - INF("stat", S_IRUGO, tid_stat), - INF("statm", S_IRUGO, pid_statm), + ONE("stat", S_IRUGO, tid_stat), + ONE("statm", S_IRUGO, pid_statm), REG("maps", S_IRUGO, maps), #ifdef CONFIG_NUMA REG("numa_maps", S_IRUGO, numa_maps), |