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Date: Fri, 8 Aug 2014 20:57:55 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Alexander Viro <viro@...iv.linux.org.uk>,
Alexey Dobriyan <adobriyan@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Cyrill Gorcunov <gorcunov@...nvz.org>,
David Howells <dhowells@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
"Kirill A. Shutemov" <kirill@...temov.name>,
Peter Zijlstra <peterz@...radead.org>,
Sasha Levin <levinsasha928@...il.com>
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 3/5] proc: kill *_tid_*maps* stuff
Kill *_tid_*maps* data/functions. proc_maps_open() can use
is_tgid_pid_entry() and initialize priv->is_tgid for ->show()
methods.
Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
fs/proc/base.c | 6 +-
fs/proc/internal.h | 4 +-
fs/proc/task_mmu.c | 140 ++++++++--------------------------------------------
3 files changed, 25 insertions(+), 125 deletions(-)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9d47fe0..368f6fe 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2919,12 +2919,12 @@ static const struct pid_entry tid_base_stuff[] = {
INF("cmdline", S_IRUGO, proc_pid_cmdline),
ONE("stat", S_IRUGO, proc_pid_stat),
ONE("statm", S_IRUGO, proc_pid_statm),
- REG("maps", S_IRUGO, proc_tid_maps_operations),
+ REG("maps", S_IRUGO, proc_pid_maps_operations),
#ifdef CONFIG_CHECKPOINT_RESTORE
REG("children", S_IRUGO, proc_tid_children_operations),
#endif
#ifdef CONFIG_NUMA
- REG("numa_maps", S_IRUGO, proc_tid_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),
@@ -2934,7 +2934,7 @@ 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_tid_smaps_operations),
+ REG("smaps", S_IRUGO, proc_pid_smaps_operations),
REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index c7bb0e3..46500af 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -268,6 +268,7 @@ extern int proc_remount(struct super_block *, int *, char *);
*/
struct proc_maps_private {
struct pid *pid;
+ bool is_tgid;
struct task_struct *task;
struct mm_struct *mm;
#ifdef CONFIG_MMU
@@ -281,11 +282,8 @@ struct proc_maps_private {
struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode);
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;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 4ec6b72..7618ef8 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -231,6 +231,7 @@ static int proc_maps_open(struct inode *inode, struct file *file,
return -ENOMEM;
priv->pid = proc_pid(inode);
+ priv->is_tgid = is_tgid_pid_entry(PROC_I(inode)->pid_entry);
priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
if (IS_ERR(priv->mm)) {
int err = PTR_ERR(priv->mm);
@@ -252,16 +253,7 @@ static int proc_map_release(struct inode *inode, struct file *file)
return seq_release_private(inode, file);
}
-
-static int do_maps_open(struct inode *inode, struct file *file,
- const struct seq_operations *ops)
-{
- return proc_maps_open(inode, file, ops,
- sizeof(struct proc_maps_private));
-}
-
-static void
-show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
+static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
{
struct mm_struct *mm = vma->vm_mm;
struct file *file = vma->vm_file;
@@ -331,15 +323,15 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
goto done;
}
- tid = vm_is_stack(task, vma, is_pid);
-
+ tid = vm_is_stack(task, vma, priv->is_tgid);
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)) {
+ if (!priv->is_tgid ||
+ (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack)) {
name = "[stack]";
} else {
/* Thread stack in /proc/PID/maps */
@@ -357,23 +349,13 @@ done:
seq_putc(m, '\n');
}
-static int show_map(struct seq_file *m, void *v, int is_pid)
+static int show_pid_map(struct seq_file *m, void *v)
{
- show_map_vma(m, v, is_pid);
+ show_map_vma(m, v);
m_cache_vma(m, 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,
@@ -381,21 +363,10 @@ static const struct seq_operations proc_pid_maps_op = {
.show = show_pid_map
};
-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);
-}
-
-static int tid_maps_open(struct inode *inode, struct file *file)
-{
- return do_maps_open(inode, file, &proc_tid_maps_op);
+ return proc_maps_open(inode, file, &proc_pid_maps_op,
+ sizeof(struct proc_maps_private));
}
const struct file_operations proc_pid_maps_operations = {
@@ -405,13 +376,6 @@ const struct file_operations proc_pid_maps_operations = {
.release = proc_map_release,
};
-const struct file_operations proc_tid_maps_operations = {
- .open = tid_maps_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = proc_map_release,
-};
-
/*
* Proportional Set Size(PSS): my share of RSS.
*
@@ -584,7 +548,7 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
seq_putc(m, '\n');
}
-static int show_smap(struct seq_file *m, void *v, int is_pid)
+static int show_pid_smap(struct seq_file *m, void *v)
{
struct vm_area_struct *vma = v;
struct mem_size_stats mss;
@@ -600,7 +564,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid)
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, is_pid);
+ show_map_vma(m, vma);
seq_printf(m,
"Size: %8lu kB\n"
@@ -642,16 +606,6 @@ static int show_smap(struct seq_file *m, void *v, int is_pid)
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,
@@ -659,21 +613,10 @@ static const struct seq_operations proc_pid_smaps_op = {
.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 pid_smaps_open(struct inode *inode, struct file *file)
{
- return do_maps_open(inode, file, &proc_pid_smaps_op);
-}
-
-static int tid_smaps_open(struct inode *inode, struct file *file)
-{
- return do_maps_open(inode, file, &proc_tid_smaps_op);
+ return proc_maps_open(inode, file, &proc_pid_smaps_op,
+ sizeof(struct proc_maps_private));
}
const struct file_operations proc_pid_smaps_operations = {
@@ -683,13 +626,6 @@ const struct file_operations proc_pid_smaps_operations = {
.release = proc_map_release,
};
-const struct file_operations proc_tid_smaps_operations = {
- .open = tid_smaps_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = proc_map_release,
-};
-
/*
* We do not want to have constant page-shift bits sitting in
* pagemap entries and are about to reuse them some time soon.
@@ -1382,7 +1318,7 @@ 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, int is_pid)
+static int show_pid_numa_map(struct seq_file *m, void *v)
{
struct numa_maps_private *numa_priv = m->private;
struct proc_maps_private *proc_priv = &numa_priv->proc_maps;
@@ -1421,14 +1357,15 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
} else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
seq_puts(m, " heap");
} else {
- pid_t tid = vm_is_stack(task, vma, is_pid);
+ pid_t tid = vm_is_stack(task, vma, proc_priv->is_tgid);
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))
+ if (!proc_priv->is_tgid ||
+ (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack))
seq_puts(m, " stack");
else
seq_printf(m, " stack:%d", tid);
@@ -1473,16 +1410,6 @@ 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,
@@ -1490,28 +1417,10 @@ static const struct seq_operations proc_pid_numa_maps_op = {
.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,
- const struct seq_operations *ops)
-{
- return proc_maps_open(inode, file, ops,
- sizeof(struct numa_maps_private));
-}
-
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);
+ return proc_maps_open(inode, file, &proc_pid_numa_maps_op,
+ sizeof(struct numa_maps_private));
}
const struct file_operations proc_pid_numa_maps_operations = {
@@ -1520,11 +1429,4 @@ const struct file_operations proc_pid_numa_maps_operations = {
.llseek = seq_lseek,
.release = proc_map_release,
};
-
-const struct file_operations proc_tid_numa_maps_operations = {
- .open = tid_numa_maps_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = proc_map_release,
-};
#endif /* CONFIG_NUMA */
--
1.5.5.1
--
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