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Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c247
1 files changed, 169 insertions, 78 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index a5fa1fdafc4e..19489b0d5554 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -67,12 +67,12 @@
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/ptrace.h>
-#include <linux/seccomp.h>
#include <linux/cpuset.h>
#include <linux/audit.h>
#include <linux/poll.h>
#include <linux/nsproxy.h>
#include <linux/oom.h>
+#include <linux/elf.h>
#include "internal.h"
/* NOTE:
@@ -204,12 +204,17 @@ static int proc_pid_environ(struct task_struct *task, char * buffer)
int res = 0;
struct mm_struct *mm = get_task_mm(task);
if (mm) {
- unsigned int len = mm->env_end - mm->env_start;
+ unsigned int len;
+
+ res = -ESRCH;
+ if (!ptrace_may_attach(task))
+ goto out;
+
+ len = mm->env_end - mm->env_start;
if (len > PAGE_SIZE)
len = PAGE_SIZE;
res = access_process_vm(task, mm->env_start, buffer, len, 0);
- if (!ptrace_may_attach(task))
- res = -ESRCH;
+out:
mmput(mm);
}
return res;
@@ -279,7 +284,7 @@ static int proc_pid_auxv(struct task_struct *task, char *buffer)
static int proc_pid_wchan(struct task_struct *task, char *buffer)
{
unsigned long wchan;
- char symname[KSYM_NAME_LEN+1];
+ char symname[KSYM_NAME_LEN];
wchan = get_wchan(task);
@@ -296,7 +301,7 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
*/
static int proc_pid_schedstat(struct task_struct *task, char *buffer)
{
- return sprintf(buffer, "%lu %lu %lu\n",
+ return sprintf(buffer, "%llu %llu %lu\n",
task->sched_info.cpu_time,
task->sched_info.run_delay,
task->sched_info.pcnt);
@@ -812,71 +817,6 @@ static const struct file_operations proc_loginuid_operations = {
};
#endif
-#ifdef CONFIG_SECCOMP
-static ssize_t seccomp_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct task_struct *tsk = get_proc_task(file->f_dentry->d_inode);
- char __buf[20];
- size_t len;
-
- if (!tsk)
- return -ESRCH;
- /* no need to print the trailing zero, so use only len */
- len = sprintf(__buf, "%u\n", tsk->seccomp.mode);
- put_task_struct(tsk);
-
- return simple_read_from_buffer(buf, count, ppos, __buf, len);
-}
-
-static ssize_t seccomp_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct task_struct *tsk = get_proc_task(file->f_dentry->d_inode);
- char __buf[20], *end;
- unsigned int seccomp_mode;
- ssize_t result;
-
- result = -ESRCH;
- if (!tsk)
- goto out_no_task;
-
- /* can set it only once to be even more secure */
- result = -EPERM;
- if (unlikely(tsk->seccomp.mode))
- goto out;
-
- result = -EFAULT;
- memset(__buf, 0, sizeof(__buf));
- count = min(count, sizeof(__buf) - 1);
- if (copy_from_user(__buf, buf, count))
- goto out;
-
- seccomp_mode = simple_strtoul(__buf, &end, 0);
- if (*end == '\n')
- end++;
- result = -EINVAL;
- if (seccomp_mode && seccomp_mode <= NR_SECCOMP_MODES) {
- tsk->seccomp.mode = seccomp_mode;
- set_tsk_thread_flag(tsk, TIF_SECCOMP);
- } else
- goto out;
- result = -EIO;
- if (unlikely(!(end - __buf)))
- goto out;
- result = end - __buf;
-out:
- put_task_struct(tsk);
-out_no_task:
- return result;
-}
-
-static const struct file_operations proc_seccomp_operations = {
- .read = seccomp_read,
- .write = seccomp_write,
-};
-#endif /* CONFIG_SECCOMP */
-
#ifdef CONFIG_FAULT_INJECTION
static ssize_t proc_fault_inject_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
@@ -929,6 +869,69 @@ static const struct file_operations proc_fault_inject_operations = {
};
#endif
+#ifdef CONFIG_SCHED_DEBUG
+/*
+ * Print out various scheduling related per-task fields:
+ */
+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;
+ proc_sched_show_task(p, m);
+
+ put_task_struct(p);
+
+ return 0;
+}
+
+static ssize_t
+sched_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *offset)
+{
+ 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;
+ proc_sched_set_task(p);
+
+ put_task_struct(p);
+
+ return count;
+}
+
+static int sched_open(struct inode *inode, struct file *filp)
+{
+ int ret;
+
+ ret = single_open(filp, sched_show, NULL);
+ if (!ret) {
+ struct seq_file *m = filp->private_data;
+
+ m->private = inode;
+ }
+ return ret;
+}
+
+static const struct file_operations proc_pid_sched_operations = {
+ .open = sched_open,
+ .read = seq_read,
+ .write = sched_write,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#endif
+
static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
@@ -1012,7 +1015,7 @@ static int task_dumpable(struct task_struct *task)
task_lock(task);
mm = task->mm;
if (mm)
- dumpable = mm->dumpable;
+ dumpable = get_dumpable(mm);
task_unlock(task);
if(dumpable == 1)
return 1;
@@ -1783,6 +1786,91 @@ static const struct inode_operations proc_attr_dir_inode_operations = {
#endif
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+ struct mm_struct *mm;
+ char buffer[PROC_NUMBUF];
+ size_t len;
+ int ret;
+
+ if (!task)
+ return -ESRCH;
+
+ ret = 0;
+ mm = get_task_mm(task);
+ if (mm) {
+ len = snprintf(buffer, sizeof(buffer), "%08lx\n",
+ ((mm->flags & MMF_DUMP_FILTER_MASK) >>
+ MMF_DUMP_FILTER_SHIFT));
+ mmput(mm);
+ ret = simple_read_from_buffer(buf, count, ppos, buffer, len);
+ }
+
+ put_task_struct(task);
+
+ return ret;
+}
+
+static ssize_t proc_coredump_filter_write(struct file *file,
+ const char __user *buf,
+ size_t count,
+ loff_t *ppos)
+{
+ struct task_struct *task;
+ struct mm_struct *mm;
+ char buffer[PROC_NUMBUF], *end;
+ unsigned int val;
+ int ret;
+ int i;
+ unsigned long mask;
+
+ ret = -EFAULT;
+ memset(buffer, 0, sizeof(buffer));
+ if (count > sizeof(buffer) - 1)
+ count = sizeof(buffer) - 1;
+ if (copy_from_user(buffer, buf, count))
+ goto out_no_task;
+
+ ret = -EINVAL;
+ val = (unsigned int)simple_strtoul(buffer, &end, 0);
+ if (*end == '\n')
+ end++;
+ if (end - buffer == 0)
+ goto out_no_task;
+
+ ret = -ESRCH;
+ task = get_proc_task(file->f_dentry->d_inode);
+ if (!task)
+ goto out_no_task;
+
+ ret = end - buffer;
+ mm = get_task_mm(task);
+ if (!mm)
+ goto out_no_mm;
+
+ for (i = 0, mask = 1; i < MMF_DUMP_FILTER_BITS; i++, mask <<= 1) {
+ if (val & mask)
+ set_bit(i + MMF_DUMP_FILTER_SHIFT, &mm->flags);
+ else
+ clear_bit(i + MMF_DUMP_FILTER_SHIFT, &mm->flags);
+ }
+
+ mmput(mm);
+ out_no_mm:
+ put_task_struct(task);
+ out_no_task:
+ return ret;
+}
+
+static const struct file_operations proc_coredump_filter_operations = {
+ .read = proc_coredump_filter_read,
+ .write = proc_coredump_filter_write,
+};
+#endif
+
/*
* /proc/self:
*/
@@ -1963,6 +2051,9 @@ static const struct pid_entry tgid_base_stuff[] = {
INF("environ", S_IRUSR, pid_environ),
INF("auxv", S_IRUSR, pid_auxv),
INF("status", S_IRUGO, pid_status),
+#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),
@@ -1971,9 +2062,6 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("numa_maps", S_IRUGO, numa_maps),
#endif
REG("mem", S_IRUSR|S_IWUSR, mem),
-#ifdef CONFIG_SECCOMP
- REG("seccomp", S_IRUSR|S_IWUSR, seccomp),
-#endif
LNK("cwd", cwd),
LNK("root", root),
LNK("exe", exe),
@@ -2003,6 +2091,9 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_FAULT_INJECTION
REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
#endif
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+ REG("coredump_filter", S_IRUGO|S_IWUSR, coredump_filter),
+#endif
#ifdef CONFIG_TASK_IO_ACCOUNTING
INF("io", S_IRUGO, pid_io_accounting),
#endif
@@ -2247,6 +2338,9 @@ static const struct pid_entry tid_base_stuff[] = {
INF("environ", S_IRUSR, pid_environ),
INF("auxv", S_IRUSR, pid_auxv),
INF("status", S_IRUGO, pid_status),
+#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),
@@ -2255,9 +2349,6 @@ static const struct pid_entry tid_base_stuff[] = {
REG("numa_maps", S_IRUGO, numa_maps),
#endif
REG("mem", S_IRUSR|S_IWUSR, mem),
-#ifdef CONFIG_SECCOMP
- REG("seccomp", S_IRUSR|S_IWUSR, seccomp),
-#endif
LNK("cwd", cwd),
LNK("root", root),
LNK("exe", exe),
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 06:06:57 +0000