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-rw-r--r--fs/proc/base.c235
1 files changed, 130 insertions, 105 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index cad92c1ac2b3..0c9de19a1633 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -65,6 +65,7 @@
#include <linux/mm.h>
#include <linux/rcupdate.h>
#include <linux/kallsyms.h>
+#include <linux/stacktrace.h>
#include <linux/resource.h>
#include <linux/module.h>
#include <linux/mount.h>
@@ -109,25 +110,22 @@ struct pid_entry {
.op = OP, \
}
-#define DIR(NAME, MODE, OTYPE) \
- NOD(NAME, (S_IFDIR|(MODE)), \
- &proc_##OTYPE##_inode_operations, &proc_##OTYPE##_operations, \
- {} )
-#define LNK(NAME, OTYPE) \
+#define DIR(NAME, MODE, iops, fops) \
+ NOD(NAME, (S_IFDIR|(MODE)), &iops, &fops, {} )
+#define LNK(NAME, get_link) \
NOD(NAME, (S_IFLNK|S_IRWXUGO), \
&proc_pid_link_inode_operations, NULL, \
- { .proc_get_link = &proc_##OTYPE##_link } )
-#define REG(NAME, MODE, OTYPE) \
- NOD(NAME, (S_IFREG|(MODE)), NULL, \
- &proc_##OTYPE##_operations, {})
-#define INF(NAME, MODE, OTYPE) \
+ { .proc_get_link = get_link } )
+#define REG(NAME, MODE, fops) \
+ NOD(NAME, (S_IFREG|(MODE)), NULL, &fops, {})
+#define INF(NAME, MODE, read) \
NOD(NAME, (S_IFREG|(MODE)), \
NULL, &proc_info_file_operations, \
- { .proc_read = &proc_##OTYPE } )
-#define ONE(NAME, MODE, OTYPE) \
+ { .proc_read = read } )
+#define ONE(NAME, MODE, show) \
NOD(NAME, (S_IFREG|(MODE)), \
NULL, &proc_single_file_operations, \
- { .proc_show = &proc_##OTYPE } )
+ { .proc_show = show } )
/*
* Count the number of hardlinks for the pid_entry table, excluding the .
@@ -308,9 +306,9 @@ static int proc_pid_auxv(struct task_struct *task, char *buffer)
struct mm_struct *mm = get_task_mm(task);
if (mm) {
unsigned int nwords = 0;
- do
+ do {
nwords += 2;
- while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
+ } while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
res = nwords * sizeof(mm->saved_auxv[0]);
if (res > PAGE_SIZE)
res = PAGE_SIZE;
@@ -340,6 +338,37 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
}
#endif /* CONFIG_KALLSYMS */
+#ifdef CONFIG_STACKTRACE
+
+#define MAX_STACK_TRACE_DEPTH 64
+
+static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
+{
+ struct stack_trace trace;
+ unsigned long *entries;
+ int i;
+
+ entries = kmalloc(MAX_STACK_TRACE_DEPTH * sizeof(*entries), GFP_KERNEL);
+ if (!entries)
+ return -ENOMEM;
+
+ trace.nr_entries = 0;
+ trace.max_entries = MAX_STACK_TRACE_DEPTH;
+ trace.entries = entries;
+ trace.skip = 0;
+ save_stack_trace_tsk(task, &trace);
+
+ for (i = 0; i < trace.nr_entries; i++) {
+ seq_printf(m, "[<%p>] %pS\n",
+ (void *)entries[i], (void *)entries[i]);
+ }
+ kfree(entries);
+
+ return 0;
+}
+#endif
+
#ifdef CONFIG_SCHEDSTATS
/*
* Provides /proc/PID/schedstat
@@ -1186,8 +1215,6 @@ static int sched_show(struct seq_file *m, void *v)
struct inode *inode = m->private;
struct task_struct *p;
- WARN_ON(!inode);
-
p = get_proc_task(inode);
if (!p)
return -ESRCH;
@@ -1205,8 +1232,6 @@ sched_write(struct file *file, const char __user *buf,
struct inode *inode = file->f_path.dentry->d_inode;
struct task_struct *p;
- WARN_ON(!inode);
-
p = get_proc_task(inode);
if (!p)
return -ESRCH;
@@ -1426,8 +1451,6 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st
if (!ei->pid)
goto out_unlock;
- inode->i_uid = 0;
- inode->i_gid = 0;
if (task_dumpable(task)) {
rcu_read_lock();
cred = __task_cred(task);
@@ -1976,13 +1999,11 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
const struct pid_entry *ents,
unsigned int nents)
{
- struct inode *inode;
struct dentry *error;
struct task_struct *task = get_proc_task(dir);
const struct pid_entry *p, *last;
error = ERR_PTR(-ENOENT);
- inode = NULL;
if (!task)
goto out_no_task;
@@ -2138,12 +2159,12 @@ static const struct file_operations proc_pid_attr_operations = {
};
static const struct pid_entry attr_dir_stuff[] = {
- REG("current", S_IRUGO|S_IWUGO, pid_attr),
- REG("prev", S_IRUGO, pid_attr),
- REG("exec", S_IRUGO|S_IWUGO, pid_attr),
- REG("fscreate", S_IRUGO|S_IWUGO, pid_attr),
- REG("keycreate", S_IRUGO|S_IWUGO, pid_attr),
- REG("sockcreate", S_IRUGO|S_IWUGO, pid_attr),
+ REG("current", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+ REG("prev", S_IRUGO, proc_pid_attr_operations),
+ REG("exec", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+ REG("fscreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+ REG("keycreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+ REG("sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
};
static int proc_attr_dir_readdir(struct file * filp,
@@ -2349,8 +2370,6 @@ static struct dentry *proc_base_instantiate(struct inode *dir,
if (!ei->pid)
goto out_iput;
- inode->i_uid = 0;
- inode->i_gid = 0;
inode->i_mode = p->mode;
if (S_ISDIR(inode->i_mode))
inode->i_nlink = 2;
@@ -2465,74 +2484,77 @@ static const struct file_operations proc_task_operations;
static const struct inode_operations proc_task_inode_operations;
static const struct pid_entry tgid_base_stuff[] = {
- DIR("task", S_IRUGO|S_IXUGO, task),
- DIR("fd", S_IRUSR|S_IXUSR, fd),
- DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
+ DIR("task", S_IRUGO|S_IXUGO, proc_task_inode_operations, proc_task_operations),
+ DIR("fd", S_IRUSR|S_IXUSR, proc_fd_inode_operations, proc_fd_operations),
+ DIR("fdinfo", S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fdinfo_operations),
#ifdef CONFIG_NET
- DIR("net", S_IRUGO|S_IXUGO, net),
+ DIR("net", S_IRUGO|S_IXUGO, proc_net_inode_operations, proc_net_operations),
#endif
- REG("environ", S_IRUSR, environ),
- INF("auxv", S_IRUSR, pid_auxv),
- ONE("status", S_IRUGO, pid_status),
- ONE("personality", S_IRUSR, pid_personality),
- INF("limits", S_IRUSR, pid_limits),
+ REG("environ", S_IRUSR, proc_environ_operations),
+ INF("auxv", S_IRUSR, proc_pid_auxv),
+ ONE("status", S_IRUGO, proc_pid_status),
+ ONE("personality", S_IRUSR, proc_pid_personality),
+ INF("limits", S_IRUSR, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
- REG("sched", S_IRUGO|S_IWUSR, pid_sched),
+ REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
#endif
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
- INF("syscall", S_IRUSR, pid_syscall),
+ INF("syscall", S_IRUSR, proc_pid_syscall),
#endif
- INF("cmdline", S_IRUGO, pid_cmdline),
- ONE("stat", S_IRUGO, tgid_stat),
- ONE("statm", S_IRUGO, pid_statm),
- REG("maps", S_IRUGO, maps),
+ INF("cmdline", S_IRUGO, proc_pid_cmdline),
+ ONE("stat", S_IRUGO, proc_tgid_stat),
+ ONE("statm", S_IRUGO, proc_pid_statm),
+ REG("maps", S_IRUGO, proc_maps_operations),
#ifdef CONFIG_NUMA
- REG("numa_maps", S_IRUGO, numa_maps),
+ REG("numa_maps", S_IRUGO, proc_numa_maps_operations),
#endif
- REG("mem", S_IRUSR|S_IWUSR, mem),
- LNK("cwd", cwd),
- LNK("root", root),
- LNK("exe", exe),
- REG("mounts", S_IRUGO, mounts),
- REG("mountinfo", S_IRUGO, mountinfo),
- REG("mountstats", S_IRUSR, mountstats),
+ REG("mem", S_IRUSR|S_IWUSR, proc_mem_operations),
+ LNK("cwd", proc_cwd_link),
+ LNK("root", proc_root_link),
+ LNK("exe", proc_exe_link),
+ REG("mounts", S_IRUGO, proc_mounts_operations),
+ REG("mountinfo", S_IRUGO, proc_mountinfo_operations),
+ REG("mountstats", S_IRUSR, proc_mountstats_operations),
#ifdef CONFIG_PROC_PAGE_MONITOR
- REG("clear_refs", S_IWUSR, clear_refs),
- REG("smaps", S_IRUGO, smaps),
- REG("pagemap", S_IRUSR, pagemap),
+ REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
+ REG("smaps", S_IRUGO, proc_smaps_operations),
+ REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
- DIR("attr", S_IRUGO|S_IXUGO, attr_dir),
+ DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
#endif
#ifdef CONFIG_KALLSYMS
- INF("wchan", S_IRUGO, pid_wchan),
+ INF("wchan", S_IRUGO, proc_pid_wchan),
+#endif
+#ifdef CONFIG_STACKTRACE
+ ONE("stack", S_IRUSR, proc_pid_stack),
#endif
#ifdef CONFIG_SCHEDSTATS
- INF("schedstat", S_IRUGO, pid_schedstat),
+ INF("schedstat", S_IRUGO, proc_pid_schedstat),
#endif
#ifdef CONFIG_LATENCYTOP
- REG("latency", S_IRUGO, lstats),
+ REG("latency", S_IRUGO, proc_lstats_operations),
#endif
#ifdef CONFIG_PROC_PID_CPUSET
- REG("cpuset", S_IRUGO, cpuset),
+ REG("cpuset", S_IRUGO, proc_cpuset_operations),
#endif
#ifdef CONFIG_CGROUPS
- REG("cgroup", S_IRUGO, cgroup),
+ REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
- INF("oom_score", S_IRUGO, oom_score),
- REG("oom_adj", S_IRUGO|S_IWUSR, oom_adjust),
+ INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adjust_operations),
#ifdef CONFIG_AUDITSYSCALL
- REG("loginuid", S_IWUSR|S_IRUGO, loginuid),
- REG("sessionid", S_IRUGO, sessionid),
+ REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
+ REG("sessionid", S_IRUGO, proc_sessionid_operations),
#endif
#ifdef CONFIG_FAULT_INJECTION
- REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
+ REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
#endif
#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
- REG("coredump_filter", S_IRUGO|S_IWUSR, coredump_filter),
+ REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations),
#endif
#ifdef CONFIG_TASK_IO_ACCOUNTING
- INF("io", S_IRUGO, tgid_io_accounting),
+ INF("io", S_IRUGO, proc_tgid_io_accounting),
#endif
};
@@ -2805,66 +2827,69 @@ out_no_task:
* Tasks
*/
static const struct pid_entry tid_base_stuff[] = {
- DIR("fd", S_IRUSR|S_IXUSR, fd),
- DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
- REG("environ", S_IRUSR, environ),
- INF("auxv", S_IRUSR, pid_auxv),
- ONE("status", S_IRUGO, pid_status),
- ONE("personality", S_IRUSR, pid_personality),
- INF("limits", S_IRUSR, pid_limits),
+ DIR("fd", S_IRUSR|S_IXUSR, proc_fd_inode_operations, proc_fd_operations),
+ DIR("fdinfo", S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fd_operations),
+ REG("environ", S_IRUSR, proc_environ_operations),
+ INF("auxv", S_IRUSR, proc_pid_auxv),
+ ONE("status", S_IRUGO, proc_pid_status),
+ ONE("personality", S_IRUSR, proc_pid_personality),
+ INF("limits", S_IRUSR, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
- REG("sched", S_IRUGO|S_IWUSR, pid_sched),
+ REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
#endif
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
- INF("syscall", S_IRUSR, pid_syscall),
+ INF("syscall", S_IRUSR, proc_pid_syscall),
#endif
- INF("cmdline", S_IRUGO, pid_cmdline),
- ONE("stat", S_IRUGO, tid_stat),
- ONE("statm", S_IRUGO, pid_statm),
- REG("maps", S_IRUGO, maps),
+ INF("cmdline", S_IRUGO, proc_pid_cmdline),
+ ONE("stat", S_IRUGO, proc_tid_stat),
+ ONE("statm", S_IRUGO, proc_pid_statm),
+ REG("maps", S_IRUGO, proc_maps_operations),
#ifdef CONFIG_NUMA
- REG("numa_maps", S_IRUGO, numa_maps),
+ REG("numa_maps", S_IRUGO, proc_numa_maps_operations),
#endif
- REG("mem", S_IRUSR|S_IWUSR, mem),
- LNK("cwd", cwd),
- LNK("root", root),
- LNK("exe", exe),
- REG("mounts", S_IRUGO, mounts),
- REG("mountinfo", S_IRUGO, mountinfo),
+ REG("mem", S_IRUSR|S_IWUSR, proc_mem_operations),
+ LNK("cwd", proc_cwd_link),
+ LNK("root", proc_root_link),
+ LNK("exe", proc_exe_link),
+ REG("mounts", S_IRUGO, proc_mounts_operations),
+ REG("mountinfo", S_IRUGO, proc_mountinfo_operations),
#ifdef CONFIG_PROC_PAGE_MONITOR
- REG("clear_refs", S_IWUSR, clear_refs),
- REG("smaps", S_IRUGO, smaps),
- REG("pagemap", S_IRUSR, pagemap),
+ REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
+ REG("smaps", S_IRUGO, proc_smaps_operations),
+ REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
- DIR("attr", S_IRUGO|S_IXUGO, attr_dir),
+ DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
#endif
#ifdef CONFIG_KALLSYMS
- INF("wchan", S_IRUGO, pid_wchan),
+ INF("wchan", S_IRUGO, proc_pid_wchan),
+#endif
+#ifdef CONFIG_STACKTRACE
+ ONE("stack", S_IRUSR, proc_pid_stack),
#endif
#ifdef CONFIG_SCHEDSTATS
- INF("schedstat", S_IRUGO, pid_schedstat),
+ INF("schedstat", S_IRUGO, proc_pid_schedstat),
#endif
#ifdef CONFIG_LATENCYTOP
- REG("latency", S_IRUGO, lstats),
+ REG("latency", S_IRUGO, proc_lstats_operations),
#endif
#ifdef CONFIG_PROC_PID_CPUSET
- REG("cpuset", S_IRUGO, cpuset),
+ REG("cpuset", S_IRUGO, proc_cpuset_operations),
#endif
#ifdef CONFIG_CGROUPS
- REG("cgroup", S_IRUGO, cgroup),
+ REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
- INF("oom_score", S_IRUGO, oom_score),
- REG("oom_adj", S_IRUGO|S_IWUSR, oom_adjust),
+ INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adjust_operations),
#ifdef CONFIG_AUDITSYSCALL
- REG("loginuid", S_IWUSR|S_IRUGO, loginuid),
- REG("sessionid", S_IRUSR, sessionid),
+ REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
+ REG("sessionid", S_IRUSR, proc_sessionid_operations),
#endif
#ifdef CONFIG_FAULT_INJECTION
- REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
+ REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
#endif
#ifdef CONFIG_TASK_IO_ACCOUNTING
- INF("io", S_IRUGO, tid_io_accounting),
+ INF("io", S_IRUGO, proc_tid_io_accounting),
#endif
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-28 21:20:54 +0300