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-rw-r--r--fs/proc/array.c119
-rw-r--r--fs/proc/base.c141
-rw-r--r--fs/proc/inode.c16
-rw-r--r--fs/proc/internal.h9
-rw-r--r--fs/proc/kcore.c8
-rw-r--r--fs/proc/namespaces.c2
-rw-r--r--fs/proc/page.c2
-rw-r--r--fs/proc/proc_sysctl.c2
-rw-r--r--fs/proc/stat.c62
-rw-r--r--fs/proc/task_mmu.c360
-rw-r--r--fs/proc/task_nommu.c69
-rw-r--r--fs/proc/vmcore.c23
12 files changed, 513 insertions, 300 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index c602b8d..fbb53c2 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -462,59 +462,56 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
/* convert nsec -> ticks */
start_time = nsec_to_clock_t(start_time);
- seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
-%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
-%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld %lu %lu %lu\n",
- pid_nr_ns(pid, ns),
- tcomm,
- state,
- ppid,
- pgid,
- sid,
- tty_nr,
- tty_pgrp,
- task->flags,
- min_flt,
- cmin_flt,
- maj_flt,
- cmaj_flt,
- cputime_to_clock_t(utime),
- cputime_to_clock_t(stime),
- cputime_to_clock_t(cutime),
- cputime_to_clock_t(cstime),
- priority,
- nice,
- num_threads,
- start_time,
- vsize,
- mm ? get_mm_rss(mm) : 0,
- rsslim,
- mm ? (permitted ? mm->start_code : 1) : 0,
- mm ? (permitted ? mm->end_code : 1) : 0,
- (permitted && mm) ? mm->start_stack : 0,
- esp,
- eip,
- /* The signal information here is obsolete.
- * It must be decimal for Linux 2.0 compatibility.
- * Use /proc/#/status for real-time signals.
- */
- task->pending.signal.sig[0] & 0x7fffffffUL,
- task->blocked.sig[0] & 0x7fffffffUL,
- sigign .sig[0] & 0x7fffffffUL,
- sigcatch .sig[0] & 0x7fffffffUL,
- wchan,
- 0UL,
- 0UL,
- task->exit_signal,
- task_cpu(task),
- task->rt_priority,
- task->policy,
- (unsigned long long)delayacct_blkio_ticks(task),
- cputime_to_clock_t(gtime),
- cputime_to_clock_t(cgtime),
- (mm && permitted) ? mm->start_data : 0,
- (mm && permitted) ? mm->end_data : 0,
- (mm && permitted) ? mm->start_brk : 0);
+ seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state);
+ seq_put_decimal_ll(m, ' ', ppid);
+ seq_put_decimal_ll(m, ' ', pgid);
+ seq_put_decimal_ll(m, ' ', sid);
+ seq_put_decimal_ll(m, ' ', tty_nr);
+ seq_put_decimal_ll(m, ' ', tty_pgrp);
+ seq_put_decimal_ull(m, ' ', task->flags);
+ seq_put_decimal_ull(m, ' ', min_flt);
+ seq_put_decimal_ull(m, ' ', cmin_flt);
+ seq_put_decimal_ull(m, ' ', maj_flt);
+ seq_put_decimal_ull(m, ' ', cmaj_flt);
+ seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime));
+ seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime));
+ seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime));
+ seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime));
+ seq_put_decimal_ll(m, ' ', priority);
+ seq_put_decimal_ll(m, ' ', nice);
+ seq_put_decimal_ll(m, ' ', num_threads);
+ seq_put_decimal_ull(m, ' ', 0);
+ seq_put_decimal_ull(m, ' ', start_time);
+ seq_put_decimal_ull(m, ' ', vsize);
+ seq_put_decimal_ll(m, ' ', mm ? get_mm_rss(mm) : 0);
+ seq_put_decimal_ull(m, ' ', rsslim);
+ seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0);
+ seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0);
+ seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0);
+ seq_put_decimal_ull(m, ' ', esp);
+ seq_put_decimal_ull(m, ' ', eip);
+ /* The signal information here is obsolete.
+ * It must be decimal for Linux 2.0 compatibility.
+ * Use /proc/#/status for real-time signals.
+ */
+ seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL);
+ seq_put_decimal_ull(m, ' ', wchan);
+ seq_put_decimal_ull(m, ' ', 0);
+ seq_put_decimal_ull(m, ' ', 0);
+ seq_put_decimal_ll(m, ' ', task->exit_signal);
+ seq_put_decimal_ll(m, ' ', task_cpu(task));
+ seq_put_decimal_ull(m, ' ', task->rt_priority);
+ seq_put_decimal_ull(m, ' ', task->policy);
+ seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task));
+ seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime));
+ seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime));
+ seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_data : 0);
+ seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->end_data : 0);
+ seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_brk : 0);
+ seq_putc(m, '\n');
if (mm)
mmput(mm);
return 0;
@@ -542,8 +539,20 @@ int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
size = task_statm(mm, &shared, &text, &data, &resident);
mmput(mm);
}
- seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
- size, resident, shared, text, data);
+ /*
+ * For quick read, open code by putting numbers directly
+ * expected format is
+ * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
+ * size, resident, shared, text, data);
+ */
+ seq_put_decimal_ull(m, 0, size);
+ seq_put_decimal_ull(m, ' ', resident);
+ seq_put_decimal_ull(m, ' ', shared);
+ seq_put_decimal_ull(m, ' ', text);
+ seq_put_decimal_ull(m, ' ', 0);
+ seq_put_decimal_ull(m, ' ', text);
+ seq_put_decimal_ull(m, ' ', 0);
+ seq_putc(m, '\n');
return 0;
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9cde9edf..3b42c14 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -198,26 +198,6 @@ static int proc_root_link(struct dentry *dentry, struct path *path)
return result;
}
-static struct mm_struct *mm_access(struct task_struct *task, unsigned int mode)
-{
- struct mm_struct *mm;
- int err;
-
- err = mutex_lock_killable(&task->signal->cred_guard_mutex);
- if (err)
- return ERR_PTR(err);
-
- mm = get_task_mm(task);
- if (mm && mm != current->mm &&
- !ptrace_may_access(task, mode)) {
- mmput(mm);
- mm = ERR_PTR(-EACCES);
- }
- mutex_unlock(&task->signal->cred_guard_mutex);
-
- return mm;
-}
-
struct mm_struct *mm_for_maps(struct task_struct *task)
{
return mm_access(task, PTRACE_MODE_READ);
@@ -711,6 +691,13 @@ static int mem_open(struct inode* inode, struct file* file)
if (IS_ERR(mm))
return PTR_ERR(mm);
+ if (mm) {
+ /* ensure this mm_struct can't be freed */
+ atomic_inc(&mm->mm_count);
+ /* but do not pin its memory */
+ mmput(mm);
+ }
+
/* OK to pass negative loff_t, we can catch out-of-range */
file->f_mode |= FMODE_UNSIGNED_OFFSET;
file->private_data = mm;
@@ -718,57 +705,13 @@ static int mem_open(struct inode* inode, struct file* file)
return 0;
}
-static ssize_t mem_read(struct file * file, char __user * buf,
- size_t count, loff_t *ppos)
+static ssize_t mem_rw(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos, int write)
{
- int ret;
- char *page;
- unsigned long src = *ppos;
struct mm_struct *mm = file->private_data;
-
- if (!mm)
- return 0;
-
- page = (char *)__get_free_page(GFP_TEMPORARY);
- if (!page)
- return -ENOMEM;
-
- ret = 0;
-
- while (count > 0) {
- int this_len, retval;
-
- this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
- retval = access_remote_vm(mm, src, page, this_len, 0);
- if (!retval) {
- if (!ret)
- ret = -EIO;
- break;
- }
-
- if (copy_to_user(buf, page, retval)) {
- ret = -EFAULT;
- break;
- }
-
- ret += retval;
- src += retval;
- buf += retval;
- count -= retval;
- }
- *ppos = src;
-
- free_page((unsigned long) page);
- return ret;
-}
-
-static ssize_t mem_write(struct file * file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- int copied;
+ unsigned long addr = *ppos;
+ ssize_t copied;
char *page;
- unsigned long dst = *ppos;
- struct mm_struct *mm = file->private_data;
if (!mm)
return 0;
@@ -778,31 +721,54 @@ static ssize_t mem_write(struct file * file, const char __user *buf,
return -ENOMEM;
copied = 0;
+ if (!atomic_inc_not_zero(&mm->mm_users))
+ goto free;
+
while (count > 0) {
- int this_len, retval;
+ int this_len = min_t(int, count, PAGE_SIZE);
- this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
- if (copy_from_user(page, buf, this_len)) {
+ if (write && copy_from_user(page, buf, this_len)) {
copied = -EFAULT;
break;
}
- retval = access_remote_vm(mm, dst, page, this_len, 1);
- if (!retval) {
+
+ this_len = access_remote_vm(mm, addr, page, this_len, write);
+ if (!this_len) {
if (!copied)
copied = -EIO;
break;
}
- copied += retval;
- buf += retval;
- dst += retval;
- count -= retval;
+
+ if (!write && copy_to_user(buf, page, this_len)) {
+ copied = -EFAULT;
+ break;
+ }
+
+ buf += this_len;
+ addr += this_len;
+ copied += this_len;
+ count -= this_len;
}
- *ppos = dst;
+ *ppos = addr;
+ mmput(mm);
+free:
free_page((unsigned long) page);
return copied;
}
+static ssize_t mem_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return mem_rw(file, buf, count, ppos, 0);
+}
+
+static ssize_t mem_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return mem_rw(file, (char __user*)buf, count, ppos, 1);
+}
+
loff_t mem_lseek(struct file *file, loff_t offset, int orig)
{
switch (orig) {
@@ -822,8 +788,8 @@ loff_t mem_lseek(struct file *file, loff_t offset, int orig)
static int mem_release(struct inode *inode, struct file *file)
{
struct mm_struct *mm = file->private_data;
-
- mmput(mm);
+ if (mm)
+ mmdrop(mm);
return 0;
}
@@ -1344,8 +1310,7 @@ sched_autogroup_write(struct file *file, const char __user *buf,
if (!p)
return -ESRCH;
- err = nice;
- err = proc_sched_autogroup_set_nice(p, &err);
+ err = proc_sched_autogroup_set_nice(p, nice);
if (err)
count = err;
@@ -3024,9 +2989,9 @@ static const struct pid_entry tgid_base_stuff[] = {
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),
+ REG("maps", S_IRUGO, proc_pid_maps_operations),
#ifdef CONFIG_NUMA
- REG("numa_maps", S_IRUGO, proc_numa_maps_operations),
+ REG("numa_maps", S_IRUGO, proc_pid_numa_maps_operations),
#endif
REG("mem", S_IRUSR|S_IWUSR, proc_mem_operations),
LNK("cwd", proc_cwd_link),
@@ -3037,7 +3002,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("mountstats", S_IRUSR, proc_mountstats_operations),
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
- REG("smaps", S_IRUGO, proc_smaps_operations),
+ REG("smaps", S_IRUGO, proc_pid_smaps_operations),
REG("pagemap", S_IRUGO, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
@@ -3383,9 +3348,9 @@ static const struct pid_entry tid_base_stuff[] = {
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),
+ REG("maps", S_IRUGO, proc_tid_maps_operations),
#ifdef CONFIG_NUMA
- REG("numa_maps", S_IRUGO, proc_numa_maps_operations),
+ REG("numa_maps", S_IRUGO, proc_tid_numa_maps_operations),
#endif
REG("mem", S_IRUSR|S_IWUSR, proc_mem_operations),
LNK("cwd", proc_cwd_link),
@@ -3395,7 +3360,7 @@ static const struct pid_entry tid_base_stuff[] = {
REG("mountinfo", S_IRUGO, proc_mountinfo_operations),
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
- REG("smaps", S_IRUGO, proc_smaps_operations),
+ REG("smaps", S_IRUGO, proc_tid_smaps_operations),
REG("pagemap", S_IRUGO, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 84fd323..8461a7b 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -486,8 +486,6 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
int proc_fill_super(struct super_block *s)
{
- struct inode * root_inode;
-
s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -496,19 +494,11 @@ int proc_fill_super(struct super_block *s)
s->s_time_gran = 1;
pde_get(&proc_root);
- root_inode = proc_get_inode(s, &proc_root);
- if (!root_inode)
- goto out_no_root;
- root_inode->i_uid = 0;
- root_inode->i_gid = 0;
- s->s_root = d_alloc_root(root_inode);
- if (!s->s_root)
- goto out_no_root;
- return 0;
+ s->s_root = d_make_root(proc_get_inode(s, &proc_root));
+ if (s->s_root)
+ return 0;
-out_no_root:
printk("proc_read_super: get root inode failed\n");
- iput(root_inode);
pde_put(&proc_root);
return -ENOMEM;
}
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 3b5ecd9..5f79bb8 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -56,9 +56,12 @@ extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task);
extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
-extern const struct file_operations proc_maps_operations;
-extern const struct file_operations proc_numa_maps_operations;
-extern const struct file_operations proc_smaps_operations;
+extern const struct file_operations proc_pid_maps_operations;
+extern const struct file_operations proc_tid_maps_operations;
+extern const struct file_operations proc_pid_numa_maps_operations;
+extern const struct file_operations proc_tid_numa_maps_operations;
+extern const struct file_operations proc_pid_smaps_operations;
+extern const struct file_operations proc_tid_smaps_operations;
extern const struct file_operations proc_clear_refs_operations;
extern const struct file_operations proc_pagemap_operations;
extern const struct file_operations proc_net_operations;
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index d245cb2..86c67ee 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -157,7 +157,8 @@ static int kcore_update_ram(void)
#ifdef CONFIG_SPARSEMEM_VMEMMAP
/* calculate vmemmap's address from given system ram pfn and register it */
-int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
+static int
+get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
{
unsigned long pfn = __pa(ent->addr) >> PAGE_SHIFT;
unsigned long nr_pages = ent->size >> PAGE_SHIFT;
@@ -189,7 +190,8 @@ int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
}
#else
-int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
+static int
+get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
{
return 1;
}
@@ -513,7 +515,7 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
n = copy_to_user(buffer, (char *)start, tsz);
/*
- * We cannot distingush between fault on source
+ * We cannot distinguish between fault on source
* and fault on destination. When this happens
* we clear too and hope it will trigger the
* EFAULT again.
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 27da860..3551f1f 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -53,7 +53,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
ei->ns_ops = ns_ops;
ei->ns = ns;
- dentry->d_op = &pid_dentry_operations;
+ d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, NULL))
diff --git a/fs/proc/page.c b/fs/proc/page.c
index 6d8e6a9..7fcd0d6 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -115,6 +115,8 @@ u64 stable_page_flags(struct page *page)
u |= 1 << KPF_COMPOUND_TAIL;
if (PageHuge(page))
u |= 1 << KPF_HUGE;
+ else if (PageTransCompound(page))
+ u |= 1 << KPF_THP;
/*
* Caveats on high order pages: page->_count will only be set
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 47b474b..21d836f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -6,7 +6,9 @@
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/security.h>
+#include <linux/sched.h>
#include <linux/namei.h>
+#include <linux/mm.h>
#include <linux/module.h>
#include "internal.h"
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 121f77c..6a0c62d 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -89,18 +89,19 @@ static int show_stat(struct seq_file *p, void *v)
}
sum += arch_irq_stat();
- seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu "
- "%llu\n",
- (unsigned long long)cputime64_to_clock_t(user),
- (unsigned long long)cputime64_to_clock_t(nice),
- (unsigned long long)cputime64_to_clock_t(system),
- (unsigned long long)cputime64_to_clock_t(idle),
- (unsigned long long)cputime64_to_clock_t(iowait),
- (unsigned long long)cputime64_to_clock_t(irq),
- (unsigned long long)cputime64_to_clock_t(softirq),
- (unsigned long long)cputime64_to_clock_t(steal),
- (unsigned long long)cputime64_to_clock_t(guest),
- (unsigned long long)cputime64_to_clock_t(guest_nice));
+ seq_puts(p, "cpu ");
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
+ seq_putc(p, '\n');
+
for_each_online_cpu(i) {
/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
user = kcpustat_cpu(i).cpustat[CPUTIME_USER];
@@ -113,26 +114,24 @@ static int show_stat(struct seq_file *p, void *v)
steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
- seq_printf(p,
- "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu "
- "%llu\n",
- i,
- (unsigned long long)cputime64_to_clock_t(user),
- (unsigned long long)cputime64_to_clock_t(nice),
- (unsigned long long)cputime64_to_clock_t(system),
- (unsigned long long)cputime64_to_clock_t(idle),
- (unsigned long long)cputime64_to_clock_t(iowait),
- (unsigned long long)cputime64_to_clock_t(irq),
- (unsigned long long)cputime64_to_clock_t(softirq),
- (unsigned long long)cputime64_to_clock_t(steal),
- (unsigned long long)cputime64_to_clock_t(guest),
- (unsigned long long)cputime64_to_clock_t(guest_nice));
+ seq_printf(p, "cpu%d", i);
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
+ seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
+ seq_putc(p, '\n');
}
seq_printf(p, "intr %llu", (unsigned long long)sum);
/* sum again ? it could be updated? */
for_each_irq_nr(j)
- seq_printf(p, " %u", kstat_irqs(j));
+ seq_put_decimal_ull(p, ' ', kstat_irqs(j));
seq_printf(p,
"\nctxt %llu\n"
@@ -149,7 +148,7 @@ static int show_stat(struct seq_file *p, void *v)
seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
for (i = 0; i < NR_SOFTIRQS; i++)
- seq_printf(p, " %u", per_softirq_sums[i]);
+ seq_put_decimal_ull(p, ' ', per_softirq_sums[i]);
seq_putc(p, '\n');
return 0;
@@ -157,11 +156,14 @@ static int show_stat(struct seq_file *p, void *v)
static int stat_open(struct inode *inode, struct file *file)
{
- unsigned size = 4096 * (1 + num_possible_cpus() / 32);
+ unsigned size = 1024 + 128 * num_possible_cpus();
char *buf;
struct seq_file *m;
int res;
+ /* minimum size to display an interrupt count : 2 bytes */
+ size += 2 * nr_irqs;
+
/* don't ask for more than the kmalloc() max size */
if (size > KMALLOC_MAX_SIZE)
size = KMALLOC_MAX_SIZE;
@@ -173,7 +175,7 @@ static int stat_open(struct inode *inode, struct file *file)
if (!res) {
m = file->private_data;
m->buf = buf;
- m->size = size;
+ m->size = ksize(buf);
} else
kfree(buf);
return res;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index e418c5a..9694cc2 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -209,16 +209,20 @@ static int do_maps_open(struct inode *inode, struct file *file,
return ret;
}
-static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
+static void
+show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
{
struct mm_struct *mm = vma->vm_mm;
struct file *file = vma->vm_file;
+ struct proc_maps_private *priv = m->private;
+ struct task_struct *task = priv->task;
vm_flags_t flags = vma->vm_flags;
unsigned long ino = 0;
unsigned long long pgoff = 0;
unsigned long start, end;
dev_t dev = 0;
int len;
+ const char *name = NULL;
if (file) {
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
@@ -252,36 +256,57 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
if (file) {
pad_len_spaces(m, len);
seq_path(m, &file->f_path, "\n");
- } else {
- const char *name = arch_vma_name(vma);
- if (!name) {
- if (mm) {
- if (vma->vm_start <= mm->brk &&
- vma->vm_end >= mm->start_brk) {
- name = "[heap]";
- } else if (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack) {
- name = "[stack]";
- }
+ goto done;
+ }
+
+ name = arch_vma_name(vma);
+ if (!name) {
+ pid_t tid;
+
+ if (!mm) {
+ name = "[vdso]";
+ goto done;
+ }
+
+ if (vma->vm_start <= mm->brk &&
+ vma->vm_end >= mm->start_brk) {
+ name = "[heap]";
+ goto done;
+ }
+
+ tid = vm_is_stack(task, vma, is_pid);
+
+ if (tid != 0) {
+ /*
+ * Thread stack in /proc/PID/task/TID/maps or
+ * the main process stack.
+ */
+ if (!is_pid || (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack)) {
+ name = "[stack]";
} else {
- name = "[vdso]";
+ /* Thread stack in /proc/PID/maps */
+ pad_len_spaces(m, len);
+ seq_printf(m, "[stack:%d]", tid);
}
}
- if (name) {
- pad_len_spaces(m, len);
- seq_puts(m, name);
- }
+ }
+
+done:
+ if (name) {
+ pad_len_spaces(m, len);
+ seq_puts(m, name);
}
seq_putc(m, '\n');
}
-static int show_map(struct seq_file *m, void *v)
+static int show_map(struct seq_file *m, void *v, int is_pid)
{
struct vm_area_struct *vma = v;
struct proc_maps_private *priv = m->private;
struct task_struct *task = priv->task;
- show_map_vma(m, vma);
+ show_map_vma(m, vma, is_pid);
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task->mm))
@@ -289,20 +314,49 @@ static int show_map(struct seq_file *m, void *v)
return 0;
}
+static int show_pid_map(struct seq_file *m, void *v)
+{
+ return show_map(m, v, 1);
+}
+
+static int show_tid_map(struct seq_file *m, void *v)
+{
+ return show_map(m, v, 0);
+}
+
static const struct seq_operations proc_pid_maps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
- .show = show_map
+ .show = show_pid_map
};
-static int maps_open(struct inode *inode, struct file *file)
+static const struct seq_operations proc_tid_maps_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_tid_map
+};
+
+static int pid_maps_open(struct inode *inode, struct file *file)
{
return do_maps_open(inode, file, &proc_pid_maps_op);
}
-const struct file_operations proc_maps_operations = {
- .open = maps_open,
+static int tid_maps_open(struct inode *inode, struct file *file)
+{
+ return do_maps_open(inode, file, &proc_tid_maps_op);
+}
+
+const struct file_operations proc_pid_maps_operations = {
+ .open = pid_maps_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+const struct file_operations proc_tid_maps_operations = {
+ .open = tid_maps_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
@@ -394,21 +448,15 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
pte_t *pte;
spinlock_t *ptl;
- spin_lock(&walk->mm->page_table_lock);
- if (pmd_trans_huge(*pmd)) {
- if (pmd_trans_splitting(*pmd)) {
- spin_unlock(&walk->mm->page_table_lock);
- wait_split_huge_page(vma->anon_vma, pmd);
- } else {
- smaps_pte_entry(*(pte_t *)pmd, addr,
- HPAGE_PMD_SIZE, walk);
- spin_unlock(&walk->mm->page_table_lock);
- mss->anonymous_thp += HPAGE_PMD_SIZE;
- return 0;
- }
- } else {
+ if (pmd_trans_huge_lock(pmd, vma) == 1) {
+ smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk);
spin_unlock(&walk->mm->page_table_lock);
+ mss->anonymous_thp += HPAGE_PMD_SIZE;
+ return 0;
}
+
+ if (pmd_trans_unstable(pmd))
+ return 0;
/*
* The mmap_sem held all the way back in m_start() is what
* keeps khugepaged out of here and from collapsing things
@@ -422,7 +470,7 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
return 0;
}
-static int show_smap(struct seq_file *m, void *v)
+static int show_smap(struct seq_file *m, void *v, int is_pid)
{
struct proc_maps_private *priv = m->private;
struct task_struct *task = priv->task;
@@ -440,7 +488,7 @@ static int show_smap(struct seq_file *m, void *v)
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
- show_map_vma(m, vma);
+ show_map_vma(m, vma, is_pid);
seq_printf(m,
"Size: %8lu kB\n"
@@ -479,20 +527,49 @@ static int show_smap(struct seq_file *m, void *v)
return 0;
}
+static int show_pid_smap(struct seq_file *m, void *v)
+{
+ return show_smap(m, v, 1);
+}
+
+static int show_tid_smap(struct seq_file *m, void *v)
+{
+ return show_smap(m, v, 0);
+}
+
static const struct seq_operations proc_pid_smaps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
- .show = show_smap
+ .show = show_pid_smap
+};
+
+static const struct seq_operations proc_tid_smaps_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_tid_smap
};
-static int smaps_open(struct inode *inode, struct file *file)
+static int pid_smaps_open(struct inode *inode, struct file *file)
{
return do_maps_open(inode, file, &proc_pid_smaps_op);
}
-const struct file_operations proc_smaps_operations = {
- .open = smaps_open,
+static int tid_smaps_open(struct inode *inode, struct file *file)
+{
+ return do_maps_open(inode, file, &proc_tid_smaps_op);
+}
+
+const struct file_operations proc_pid_smaps_operations = {
+ .open = pid_smaps_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+const struct file_operations proc_tid_smaps_operations = {
+ .open = tid_smaps_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
@@ -507,6 +584,8 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
struct page *page;
split_huge_page_pmd(walk->mm, pmd);
+ if (pmd_trans_unstable(pmd))
+ return 0;
pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
for (; addr != end; pte++, addr += PAGE_SIZE) {
@@ -518,6 +597,9 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
if (!page)
continue;
+ if (PageReserved(page))
+ continue;
+
/* Clear accessed and referenced bits. */
ptep_test_and_clear_young(vma, addr, pte);
ClearPageReferenced(page);
@@ -595,11 +677,18 @@ const struct file_operations proc_clear_refs_operations = {
.llseek = noop_llseek,
};
+typedef struct {
+ u64 pme;
+} pagemap_entry_t;
+
struct pagemapread {
int pos, len;
- u64 *buffer;
+ pagemap_entry_t *buffer;
};
+#define PAGEMAP_WALK_SIZE (PMD_SIZE)
+#define PAGEMAP_WALK_MASK (PMD_MASK)
+
#define PM_ENTRY_BYTES sizeof(u64)
#define PM_STATUS_BITS 3
#define PM_STATUS_OFFSET (64 - PM_STATUS_BITS)
@@ -617,10 +706,15 @@ struct pagemapread {
#define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT)
#define PM_END_OF_BUFFER 1
-static int add_to_pagemap(unsigned long addr, u64 pfn,
+static inline pagemap_entry_t make_pme(u64 val)
+{
+ return (pagemap_entry_t) { .pme = val };
+}
+
+static int add_to_pagemap(unsigned long addr, pagemap_entry_t *pme,
struct pagemapread *pm)
{
- pm->buffer[pm->pos++] = pfn;
+ pm->buffer[pm->pos++] = *pme;
if (pm->pos >= pm->len)
return PM_END_OF_BUFFER;
return 0;
@@ -632,8 +726,10 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
struct pagemapread *pm = walk->private;
unsigned long addr;
int err = 0;
+ pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
+
for (addr = start; addr < end; addr += PAGE_SIZE) {
- err = add_to_pagemap(addr, PM_NOT_PRESENT, pm);
+ err = add_to_pagemap(addr, &pme, pm);
if (err)
break;
}
@@ -646,18 +742,36 @@ static u64 swap_pte_to_pagemap_entry(pte_t pte)
return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT);
}
-static u64 pte_to_pagemap_entry(pte_t pte)
+static void pte_to_pagemap_entry(pagemap_entry_t *pme, pte_t pte)
{
- u64 pme = 0;
if (is_swap_pte(pte))
- pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte))
- | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP;
+ *pme = make_pme(PM_PFRAME(swap_pte_to_pagemap_entry(pte))
+ | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP);
else if (pte_present(pte))
- pme = PM_PFRAME(pte_pfn(pte))
- | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
- return pme;
+ *pme = make_pme(PM_PFRAME(pte_pfn(pte))
+ | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
}
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
+ pmd_t pmd, int offset)
+{
+ /*
+ * Currently pmd for thp is always present because thp can not be
+ * swapped-out, migrated, or HWPOISONed (split in such cases instead.)
+ * This if-check is just to prepare for future implementation.
+ */
+ if (pmd_present(pmd))
+ *pme = make_pme(PM_PFRAME(pmd_pfn(pmd) + offset)
+ | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+}
+#else
+static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
+ pmd_t pmd, int offset)
+{
+}
+#endif
+
static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
struct mm_walk *walk)
{
@@ -665,13 +779,30 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
struct pagemapread *pm = walk->private;
pte_t *pte;
int err = 0;
+ pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
- split_huge_page_pmd(walk->mm, pmd);
+ if (pmd_trans_unstable(pmd))
+ return 0;
/* find the first VMA at or above 'addr' */
vma = find_vma(walk->mm, addr);
+ spin_lock(&walk->mm->page_table_lock);
+ if (pmd_trans_huge_lock(pmd, vma) == 1) {
+ for (; addr != end; addr += PAGE_SIZE) {
+ unsigned long offset;
+
+ offset = (addr & ~PAGEMAP_WALK_MASK) >>
+ PAGE_SHIFT;
+ thp_pmd_to_pagemap_entry(&pme, *pmd, offset);
+ err = add_to_pagemap(addr, &pme, pm);
+ if (err)
+ break;
+ }
+ spin_unlock(&walk->mm->page_table_lock);
+ return err;
+ }
+
for (; addr != end; addr += PAGE_SIZE) {
- u64 pfn = PM_NOT_PRESENT;
/* check to see if we've left 'vma' behind
* and need a new, higher one */
@@ -683,11 +814,11 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
if (vma && (vma->vm_start <= addr) &&
!is_vm_hugetlb_page(vma)) {
pte = pte_offset_map(pmd, addr);
- pfn = pte_to_pagemap_entry(*pte);
+ pte_to_pagemap_entry(&pme, *pte);
/* unmap before userspace copy */
pte_unmap(pte);
}
- err = add_to_pagemap(addr, pfn, pm);
+ err = add_to_pagemap(addr, &pme, pm);
if (err)
return err;
}
@@ -698,13 +829,12 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
}
#ifdef CONFIG_HUGETLB_PAGE
-static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
+static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme,
+ pte_t pte, int offset)
{
- u64 pme = 0;
if (pte_present(pte))
- pme = PM_PFRAME(pte_pfn(pte) + offset)
- | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
- return pme;
+ *pme = make_pme(PM_PFRAME(pte_pfn(pte) + offset)
+ | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
}
/* This function walks within one hugetlb entry in the single call */
@@ -714,12 +844,12 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
{
struct pagemapread *pm = walk->private;
int err = 0;
- u64 pfn;
+ pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
for (; addr != end; addr += PAGE_SIZE) {
int offset = (addr & ~hmask) >> PAGE_SHIFT;
- pfn = huge_pte_to_pagemap_entry(*pte, offset);
- err = add_to_pagemap(addr, pfn, pm);
+ huge_pte_to_pagemap_entry(&pme, *pte, offset);
+ err = add_to_pagemap(addr, &pme, pm);
if (err)
return err;
}
@@ -754,8 +884,6 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
* determine which areas of memory are actually mapped and llseek to
* skip over unmapped regions.
*/
-#define PAGEMAP_WALK_SIZE (PMD_SIZE)
-#define PAGEMAP_WALK_MASK (PMD_MASK)
static ssize_t pagemap_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
@@ -938,26 +1066,21 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
pte_t *pte;
md = walk->private;
- spin_lock(&walk->mm->page_table_lock);
- if (pmd_trans_huge(*pmd)) {
- if (pmd_trans_splitting(*pmd)) {
- spin_unlock(&walk->mm->page_table_lock);
- wait_split_huge_page(md->vma->anon_vma, pmd);
- } else {
- pte_t huge_pte = *(pte_t *)pmd;
- struct page *page;
-
- page = can_gather_numa_stats(huge_pte, md->vma, addr);
- if (page)
- gather_stats(page, md, pte_dirty(huge_pte),
- HPAGE_PMD_SIZE/PAGE_SIZE);
- spin_unlock(&walk->mm->page_table_lock);
- return 0;
- }
- } else {
+
+ if (pmd_trans_huge_lock(pmd, md->vma) == 1) {
+ pte_t huge_pte = *(pte_t *)pmd;
+ struct page *page;
+
+ page = can_gather_numa_stats(huge_pte, md->vma, addr);
+ if (page)
+ gather_stats(page, md, pte_dirty(huge_pte),
+ HPAGE_PMD_SIZE/PAGE_SIZE);
spin_unlock(&walk->mm->page_table_lock);
+ return 0;
}
+ if (pmd_trans_unstable(pmd))
+ return 0;
orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
do {
struct page *page = can_gather_numa_stats(*pte, md->vma, addr);
@@ -999,7 +1122,7 @@ static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask,
/*
* Display pages allocated per node and memory policy via /proc.
*/
-static int show_numa_map(struct seq_file *m, void *v)
+static int show_numa_map(struct seq_file *m, void *v, int is_pid)
{
struct numa_maps_private *numa_priv = m->private;
struct proc_maps_private *proc_priv = &numa_priv->proc_maps;
@@ -1036,9 +1159,19 @@ static int show_numa_map(struct seq_file *m, void *v)
seq_path(m, &file->f_path, "\n\t= ");
} else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
seq_printf(m, " heap");
- } else if (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack) {
- seq_printf(m, " stack");
+ } else {
+ pid_t tid = vm_is_stack(proc_priv->task, vma, is_pid);
+ if (tid != 0) {
+ /*
+ * Thread stack in /proc/PID/task/TID/maps or
+ * the main process stack.
+ */
+ if (!is_pid || (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack))
+ seq_printf(m, " stack");
+ else
+ seq_printf(m, " stack:%d", tid);
+ }
}
if (is_vm_hugetlb_page(vma))
@@ -1081,21 +1214,39 @@ out:
return 0;
}
+static int show_pid_numa_map(struct seq_file *m, void *v)
+{
+ return show_numa_map(m, v, 1);
+}
+
+static int show_tid_numa_map(struct seq_file *m, void *v)
+{
+ return show_numa_map(m, v, 0);
+}
+
static const struct seq_operations proc_pid_numa_maps_op = {
- .start = m_start,
- .next = m_next,
- .stop = m_stop,
- .show = show_numa_map,
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_pid_numa_map,
+};
+
+static const struct seq_operations proc_tid_numa_maps_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_tid_numa_map,
};
-static int numa_maps_open(struct inode *inode, struct file *file)
+static int numa_maps_open(struct inode *inode, struct file *file,
+ const struct seq_operations *ops)
{
struct numa_maps_private *priv;
int ret = -ENOMEM;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (priv) {
priv->proc_maps.pid = proc_pid(inode);
- ret = seq_open(file, &proc_pid_numa_maps_op);
+ ret = seq_open(file, ops);
if (!ret) {
struct seq_file *m = file->private_data;
m->private = priv;
@@ -1106,8 +1257,25 @@ static int numa_maps_open(struct inode *inode, struct file *file)
return ret;
}
-const struct file_operations proc_numa_maps_operations = {
- .open = numa_maps_open,
+static int pid_numa_maps_open(struct inode *inode, struct file *file)
+{
+ return numa_maps_open(inode, file, &proc_pid_numa_maps_op);
+}
+
+static int tid_numa_maps_open(struct inode *inode, struct file *file)
+{
+ return numa_maps_open(inode, file, &proc_tid_numa_maps_op);
+}
+
+const struct file_operations proc_pid_numa_maps_operations = {
+ .open = pid_numa_maps_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+const struct file_operations proc_tid_numa_maps_operations = {
+ .open = tid_numa_maps_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 980de54..74fe164 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -134,9 +134,11 @@ static void pad_len_spaces(struct seq_file *m, int len)
/*
* display a single VMA to a sequenced file
*/
-static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
+static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
+ int is_pid)
{
struct mm_struct *mm = vma->vm_mm;
+ struct proc_maps_private *priv = m->private;
unsigned long ino = 0;
struct file *file;
dev_t dev = 0;
@@ -168,10 +170,19 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
pad_len_spaces(m, len);
seq_path(m, &file->f_path, "");
} else if (mm) {
- if (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack) {
+ pid_t tid = vm_is_stack(priv->task, vma, is_pid);
+
+ if (tid != 0) {
pad_len_spaces(m, len);
- seq_puts(m, "[stack]");
+ /*
+ * Thread stack in /proc/PID/task/TID/maps or
+ * the main process stack.
+ */
+ if (!is_pid || (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack))
+ seq_printf(m, "[stack]");
+ else
+ seq_printf(m, "[stack:%d]", tid);
}
}
@@ -182,11 +193,22 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
/*
* display mapping lines for a particular process's /proc/pid/maps
*/
-static int show_map(struct seq_file *m, void *_p)
+static int show_map(struct seq_file *m, void *_p, int is_pid)
{
struct rb_node *p = _p;
- return nommu_vma_show(m, rb_entry(p, struct vm_area_struct, vm_rb));
+ return nommu_vma_show(m, rb_entry(p, struct vm_area_struct, vm_rb),
+ is_pid);
+}
+
+static int show_pid_map(struct seq_file *m, void *_p)
+{
+ return show_map(m, _p, 1);
+}
+
+static int show_tid_map(struct seq_file *m, void *_p)
+{
+ return show_map(m, _p, 0);
}
static void *m_start(struct seq_file *m, loff_t *pos)
@@ -240,10 +262,18 @@ static const struct seq_operations proc_pid_maps_ops = {
.start = m_start,
.next = m_next,
.stop = m_stop,
- .show = show_map
+ .show = show_pid_map
+};
+
+static const struct seq_operations proc_tid_maps_ops = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_tid_map
};
-static int maps_open(struct inode *inode, struct file *file)
+static int maps_open(struct inode *inode, struct file *file,
+ const struct seq_operations *ops)
{
struct proc_maps_private *priv;
int ret = -ENOMEM;
@@ -251,7 +281,7 @@ static int maps_open(struct inode *inode, struct file *file)
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (priv) {
priv->pid = proc_pid(inode);
- ret = seq_open(file, &proc_pid_maps_ops);
+ ret = seq_open(file, ops);
if (!ret) {
struct seq_file *m = file->private_data;
m->private = priv;
@@ -262,8 +292,25 @@ static int maps_open(struct inode *inode, struct file *file)
return ret;
}
-const struct file_operations proc_maps_operations = {
- .open = maps_open,
+static int pid_maps_open(struct inode *inode, struct file *file)
+{
+ return maps_open(inode, file, &proc_pid_maps_ops);
+}
+
+static int tid_maps_open(struct inode *inode, struct file *file)
+{
+ return maps_open(inode, file, &proc_tid_maps_ops);
+}
+
+const struct file_operations proc_pid_maps_operations = {
+ .open = pid_maps_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+const struct file_operations proc_tid_maps_operations = {
+ .open = tid_maps_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index b0f450a..0d5071d 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -700,3 +700,26 @@ static int __init vmcore_init(void)
return 0;
}
module_init(vmcore_init)
+
+/* Cleanup function for vmcore module. */
+void vmcore_cleanup(void)
+{
+ struct list_head *pos, *next;
+
+ if (proc_vmcore) {
+ remove_proc_entry(proc_vmcore->name, proc_vmcore->parent);
+ proc_vmcore = NULL;
+ }
+
+ /* clear the vmcore list. */
+ list_for_each_safe(pos, next, &vmcore_list) {
+ struct vmcore *m;
+
+ m = list_entry(pos, struct vmcore, list);
+ list_del(&m->list);
+ kfree(m);
+ }
+ kfree(elfcorebuf);
+ elfcorebuf = NULL;
+}
+EXPORT_SYMBOL_GPL(vmcore_cleanup);
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