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-rw-r--r--fs/proc/Kconfig10
-rw-r--r--fs/proc/array.c7
-rw-r--r--fs/proc/base.c21
-rw-r--r--fs/proc/inode.c2
-rw-r--r--fs/proc/internal.h2
-rw-r--r--fs/proc/proc_misc.c31
-rw-r--r--fs/proc/proc_sysctl.c6
-rw-r--r--fs/proc/task_mmu.c16
-rw-r--r--fs/proc/task_nommu.c5
-rw-r--r--fs/proc/vmcore.c6
10 files changed, 29 insertions, 77 deletions
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 73cd7a418f0..50f8f0600f0 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -57,3 +57,13 @@ config PROC_SYSCTL
As it is generally a good thing, you should say Y here unless
building a kernel for install/rescue disks or your system is very
limited in memory.
+
+config PROC_PAGE_MONITOR
+ default y
+ depends on PROC_FS && MMU
+ bool "Enable /proc page monitoring" if EMBEDDED
+ help
+ Various /proc files exist to monitor process memory utilization:
+ /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
+ /proc/kpagecount, and /proc/kpageflags. Disabling these
+ interfaces will reduce the size of the kernel by approximately 4kb.
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 933953c4e40..bb9f4b05703 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -86,11 +86,6 @@
#include <asm/processor.h>
#include "internal.h"
-/* Gcc optimizes away "strlen(x)" for constant x */
-#define ADDBUF(buffer, string) \
-do { memcpy(buffer, string, strlen(string)); \
- buffer += strlen(string); } while (0)
-
static inline void task_name(struct seq_file *m, struct task_struct *p)
{
int i;
@@ -261,7 +256,6 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
sigemptyset(&ignored);
sigemptyset(&caught);
- rcu_read_lock();
if (lock_task_sighand(p, &flags)) {
pending = p->pending.signal;
shpending = p->signal->shared_pending.signal;
@@ -272,7 +266,6 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
unlock_task_sighand(p, &flags);
}
- rcu_read_unlock();
seq_printf(m, "Threads:\t%d\n", num_threads);
seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index a28840b11b8..b5918ae8ca7 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -148,9 +148,6 @@ static unsigned int pid_entry_count_dirs(const struct pid_entry *entries,
return count;
}
-int maps_protect;
-EXPORT_SYMBOL(maps_protect);
-
static struct fs_struct *get_fs_struct(struct task_struct *task)
{
struct fs_struct *fs;
@@ -164,7 +161,6 @@ static struct fs_struct *get_fs_struct(struct task_struct *task)
static int get_nr_threads(struct task_struct *tsk)
{
- /* Must be called with the rcu_read_lock held */
unsigned long flags;
int count = 0;
@@ -471,14 +467,10 @@ static int proc_pid_limits(struct task_struct *task, char *buffer)
struct rlimit rlim[RLIM_NLIMITS];
- rcu_read_lock();
- if (!lock_task_sighand(task,&flags)) {
- rcu_read_unlock();
+ if (!lock_task_sighand(task, &flags))
return 0;
- }
memcpy(rlim, task->signal->rlim, sizeof(struct rlimit) * RLIM_NLIMITS);
unlock_task_sighand(task, &flags);
- rcu_read_unlock();
/*
* print the file header
@@ -2443,6 +2435,13 @@ static int proc_tgid_io_accounting(struct task_struct *task, char *buffer)
}
#endif /* CONFIG_TASK_IO_ACCOUNTING */
+static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
+{
+ seq_printf(m, "%08x\n", task->personality);
+ return 0;
+}
+
/*
* Thread groups
*/
@@ -2459,6 +2458,7 @@ static const struct pid_entry tgid_base_stuff[] = {
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),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, pid_sched),
@@ -2794,6 +2794,7 @@ static const struct pid_entry tid_base_stuff[] = {
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),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, pid_sched),
@@ -3088,9 +3089,7 @@ static int proc_task_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
generic_fillattr(inode, stat);
if (p) {
- rcu_read_lock();
stat->nlink += get_nr_threads(p);
- rcu_read_unlock();
put_task_struct(p);
}
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 8bb03f056c2..c6b4fa7e3b4 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -342,7 +342,7 @@ static int proc_reg_open(struct inode *inode, struct file *file)
if (!pde->proc_fops) {
spin_unlock(&pde->pde_unload_lock);
kfree(pdeo);
- return rv;
+ return -EINVAL;
}
pde->pde_users++;
open = pde->proc_fops->open;
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 442202314d5..3bfb7b8747b 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -45,8 +45,6 @@ do { \
extern int nommu_vma_show(struct seq_file *, struct vm_area_struct *);
#endif
-extern int maps_protect;
-
extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task);
extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 29e20c6b1f7..59ea42e1ef0 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -45,7 +45,6 @@
#include <linux/blkdev.h>
#include <linux/hugetlb.h>
#include <linux/jiffies.h>
-#include <linux/sysrq.h>
#include <linux/vmalloc.h>
#include <linux/crash_dump.h>
#include <linux/pid_namespace.h>
@@ -68,7 +67,6 @@
extern int get_hardware_list(char *);
extern int get_stram_list(char *);
extern int get_exec_domain_list(char *);
-extern int get_dma_list(char *);
static int proc_calc_metrics(char *page, char **start, off_t off,
int count, int *eof, int len)
@@ -684,6 +682,7 @@ static int cmdline_read_proc(char *page, char **start, off_t off,
return proc_calc_metrics(page, start, off, count, eof, len);
}
+#ifdef CONFIG_FILE_LOCKING
static int locks_open(struct inode *inode, struct file *filp)
{
return seq_open(filp, &locks_seq_operations);
@@ -695,6 +694,7 @@ static const struct file_operations proc_locks_operations = {
.llseek = seq_lseek,
.release = seq_release,
};
+#endif /* CONFIG_FILE_LOCKING */
static int execdomains_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
@@ -703,28 +703,6 @@ static int execdomains_read_proc(char *page, char **start, off_t off,
return proc_calc_metrics(page, start, off, count, eof, len);
}
-#ifdef CONFIG_MAGIC_SYSRQ
-/*
- * writing 'C' to /proc/sysrq-trigger is like sysrq-C
- */
-static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- if (count) {
- char c;
-
- if (get_user(c, buf))
- return -EFAULT;
- __handle_sysrq(c, NULL, 0);
- }
- return count;
-}
-
-static const struct file_operations proc_sysrq_trigger_operations = {
- .write = write_sysrq_trigger,
-};
-#endif
-
#ifdef CONFIG_PROC_PAGE_MONITOR
#define KPMSIZE sizeof(u64)
#define KPMMASK (KPMSIZE - 1)
@@ -888,7 +866,9 @@ void __init proc_misc_init(void)
#ifdef CONFIG_PRINTK
proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
#endif
+#ifdef CONFIG_FILE_LOCKING
proc_create("locks", 0, NULL, &proc_locks_operations);
+#endif
proc_create("devices", 0, NULL, &proc_devinfo_operations);
proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations);
#ifdef CONFIG_BLOCK
@@ -931,7 +911,4 @@ void __init proc_misc_init(void)
#ifdef CONFIG_PROC_VMCORE
proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
#endif
-#ifdef CONFIG_MAGIC_SYSRQ
- proc_create("sysrq-trigger", S_IWUSR, NULL, &proc_sysrq_trigger_operations);
-#endif
}
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index f9a8b892718..945a81043ba 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -66,7 +66,7 @@ static struct ctl_table *find_in_table(struct ctl_table *p, struct qstr *name)
return NULL;
}
-struct ctl_table_header *grab_header(struct inode *inode)
+static struct ctl_table_header *grab_header(struct inode *inode)
{
if (PROC_I(inode)->sysctl)
return sysctl_head_grab(PROC_I(inode)->sysctl);
@@ -395,10 +395,10 @@ static struct dentry_operations proc_sys_dentry_operations = {
.d_compare = proc_sys_compare,
};
-static struct proc_dir_entry *proc_sys_root;
-
int proc_sys_init(void)
{
+ struct proc_dir_entry *proc_sys_root;
+
proc_sys_root = proc_mkdir("sys", NULL);
proc_sys_root->proc_iops = &proc_sys_dir_operations;
proc_sys_root->proc_fops = &proc_sys_dir_file_operations;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 73d1891ee62..4806830ea2a 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -210,9 +210,6 @@ static int show_map(struct seq_file *m, void *v)
dev_t dev = 0;
int len;
- if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
- return -EACCES;
-
if (file) {
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
dev = inode->i_sb->s_dev;
@@ -742,22 +739,11 @@ const struct file_operations proc_pagemap_operations = {
#ifdef CONFIG_NUMA
extern int show_numa_map(struct seq_file *m, void *v);
-static int show_numa_map_checked(struct seq_file *m, void *v)
-{
- struct proc_maps_private *priv = m->private;
- struct task_struct *task = priv->task;
-
- if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
- return -EACCES;
-
- return show_numa_map(m, v);
-}
-
static const struct seq_operations proc_pid_numa_maps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
- .show = show_numa_map_checked
+ .show = show_numa_map,
};
static int numa_maps_open(struct inode *inode, struct file *file)
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 5d84e7121df..219bd79ea89 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -110,11 +110,6 @@ int task_statm(struct mm_struct *mm, int *shared, int *text,
static int show_map(struct seq_file *m, void *_vml)
{
struct vm_list_struct *vml = _vml;
- struct proc_maps_private *priv = m->private;
- struct task_struct *task = priv->task;
-
- if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
- return -EACCES;
return nommu_vma_show(m, vml->vma);
}
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 9ac0f5e064e..841368b87a2 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -165,14 +165,8 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
return acc;
}
-static int open_vmcore(struct inode *inode, struct file *filp)
-{
- return 0;
-}
-
const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
- .open = open_vmcore,
};
static struct vmcore* __init get_new_element(void)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 20:42:17 +0000