Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=df5f8314ca30d6a76735748e5ba4ca9809c0f434
Commit: df5f8314ca30d6a76735748e5ba4ca9809c0f434
Parent: a56d3fc74c0178c5f41c48315604d62cff4e746d
Author: Eric W. Biederman <[EMAIL PROTECTED]>
AuthorDate: Fri Feb 8 04:18:33 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Feb 8 09:22:24 2008 -0800
proc: seqfile convert proc_pid_status to properly handle pid namespaces
Currently we possibly lookup the pid in the wrong pid namespace. So
seq_file convert proc_pid_status which ensures the proper pid namespaces is
passed in.
[EMAIL PROTECTED]: coding-style fixes]
[EMAIL PROTECTED]: build fix]
[EMAIL PROTECTED]: another build fix]
[EMAIL PROTECTED]: s390 build fix]
[EMAIL PROTECTED]: fix task_name() output]
[EMAIL PROTECTED]: fix nommu build]
Signed-off-by: Eric W. Biederman <[EMAIL PROTECTED]>
Cc: Andrew Morgan <[EMAIL PROTECTED]>
Cc: Serge Hallyn <[EMAIL PROTECTED]>
Cc: Cedric Le Goater <[EMAIL PROTECTED]>
Cc: Pavel Emelyanov <[EMAIL PROTECTED]>
Cc: Martin Schwidefsky <[EMAIL PROTECTED]>
Cc: Heiko Carstens <[EMAIL PROTECTED]>
Cc: Paul Menage <[EMAIL PROTECTED]>
Cc: Paul Jackson <[EMAIL PROTECTED]>
Cc: David Rientjes <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/s390/kernel/traps.c | 24 ++++----
fs/proc/array.c | 128 +++++++++++++++++++++---------------------
fs/proc/base.c | 4 +-
fs/proc/internal.h | 3 +-
fs/proc/task_mmu.c | 6 +-
fs/proc/task_nommu.c | 5 +-
include/asm-s390/processor.h | 3 +-
include/linux/cpuset.h | 9 ++-
include/linux/proc_fs.h | 3 +-
kernel/cpuset.c | 19 +++---
10 files changed, 103 insertions(+), 101 deletions(-)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 1a2fdb6..a4d2902 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -24,6 +24,7 @@
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/seq_file.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/kdebug.h>
@@ -218,41 +219,40 @@ void show_registers(struct pt_regs *regs)
}
/* This is called from fs/proc/array.c */
-char *task_show_regs(struct task_struct *task, char *buffer)
+void task_show_regs(struct seq_file *m, struct task_struct *task)
{
struct pt_regs *regs;
regs = task_pt_regs(task);
- buffer += sprintf(buffer, "task: %p, ksp: %p\n",
+ seq_printf(m, "task: %p, ksp: %p\n",
task, (void *)task->thread.ksp);
- buffer += sprintf(buffer, "User PSW : %p %p\n",
+ seq_printf(m, "User PSW : %p %p\n",
(void *) regs->psw.mask, (void *)regs->psw.addr);
- buffer += sprintf(buffer, "User GPRS: " FOURLONG,
+ seq_printf(m, "User GPRS: " FOURLONG,
regs->gprs[0], regs->gprs[1],
regs->gprs[2], regs->gprs[3]);
- buffer += sprintf(buffer, " " FOURLONG,
+ seq_printf(m, " " FOURLONG,
regs->gprs[4], regs->gprs[5],
regs->gprs[6], regs->gprs[7]);
- buffer += sprintf(buffer, " " FOURLONG,
+ seq_printf(m, " " FOURLONG,
regs->gprs[8], regs->gprs[9],
regs->gprs[10], regs->gprs[11]);
- buffer += sprintf(buffer, " " FOURLONG,
+ seq_printf(m, " " FOURLONG,
regs->gprs[12], regs->gprs[13],
regs->gprs[14], regs->gprs[15]);
- buffer += sprintf(buffer, "User ACRS: %08x %08x %08x %08x\n",
+ seq_printf(m, "User ACRS: %08x %08x %08x %08x\n",
task->thread.acrs[0], task->thread.acrs[1],
task->thread.acrs[2], task->thread.acrs[3]);
- buffer += sprintf(buffer, " %08x %08x %08x %08x\n",
+ seq_printf(m, " %08x %08x %08x %08x\n",
task->thread.acrs[4], task->thread.acrs[5],
task->thread.acrs[6], task->thread.acrs[7]);
- buffer += sprintf(buffer, " %08x %08x %08x %08x\n",
+ seq_printf(m, " %08x %08x %08x %08x\n",
task->thread.acrs[8], task->thread.acrs[9],
task->thread.acrs[10], task->thread.acrs[11]);
- buffer += sprintf(buffer, " %08x %08x %08x %08x\n",
+ seq_printf(m, " %08x %08x %08x %08x\n",
task->thread.acrs[12], task->thread.acrs[13],
task->thread.acrs[14], task->thread.acrs[15]);
- return buffer;
}
static DEFINE_SPINLOCK(die_lock);
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 5540e95..07d6c48 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -89,18 +89,21 @@
do { memcpy(buffer, string, strlen(string)); \
buffer += strlen(string); } while (0)
-static inline char *task_name(struct task_struct *p, char *buf)
+static inline void task_name(struct seq_file *m, struct task_struct *p)
{
int i;
+ char *buf, *end;
char *name;
char tcomm[sizeof(p->comm)];
get_task_comm(tcomm, p);
- ADDBUF(buf, "Name:\t");
+ seq_printf(m, "Name:\t");
+ end = m->buf + m->size;
+ buf = m->buf + m->count;
name = tcomm;
i = sizeof(tcomm);
- do {
+ while (i && (buf < end)) {
unsigned char c = *name;
name++;
i--;
@@ -108,20 +111,21 @@ static inline char *task_name(struct task_struct *p, char
*buf)
if (!c)
break;
if (c == '\\') {
- buf[1] = c;
- buf += 2;
+ buf++;
+ if (buf < end)
+ *buf++ = c;
continue;
}
if (c == '\n') {
- buf[0] = '\\';
- buf[1] = 'n';
- buf += 2;
+ *buf++ = '\\';
+ if (buf < end)
+ *buf++ = 'n';
continue;
}
buf++;
- } while (i);
- *buf = '\n';
- return buf+1;
+ }
+ m->count = buf - m->buf;
+ seq_printf(m, "\n");
}
/*
@@ -152,21 +156,20 @@ static inline const char *get_task_state(struct
task_struct *tsk)
return *p;
}
-static inline char *task_state(struct task_struct *p, char *buffer)
+static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *p)
{
struct group_info *group_info;
int g;
struct fdtable *fdt = NULL;
- struct pid_namespace *ns;
pid_t ppid, tpid;
- ns = current->nsproxy->pid_ns;
rcu_read_lock();
ppid = pid_alive(p) ?
task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
tpid = pid_alive(p) && p->ptrace ?
task_pid_nr_ns(rcu_dereference(p->parent), ns) : 0;
- buffer += sprintf(buffer,
+ seq_printf(m,
"State:\t%s\n"
"Tgid:\t%d\n"
"Pid:\t%d\n"
@@ -176,7 +179,7 @@ static inline char *task_state(struct task_struct *p, char
*buffer)
"Gid:\t%d\t%d\t%d\t%d\n",
get_task_state(p),
task_tgid_nr_ns(p, ns),
- task_pid_nr_ns(p, ns),
+ pid_nr_ns(pid, ns),
ppid, tpid,
p->uid, p->euid, p->suid, p->fsuid,
p->gid, p->egid, p->sgid, p->fsgid);
@@ -184,7 +187,7 @@ static inline char *task_state(struct task_struct *p, char
*buffer)
task_lock(p);
if (p->files)
fdt = files_fdtable(p->files);
- buffer += sprintf(buffer,
+ seq_printf(m,
"FDSize:\t%d\n"
"Groups:\t",
fdt ? fdt->max_fds : 0);
@@ -195,20 +198,18 @@ static inline char *task_state(struct task_struct *p,
char *buffer)
task_unlock(p);
for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
- buffer += sprintf(buffer, "%d ", GROUP_AT(group_info, g));
+ seq_printf(m, "%d ", GROUP_AT(group_info, g));
put_group_info(group_info);
- buffer += sprintf(buffer, "\n");
- return buffer;
+ seq_printf(m, "\n");
}
-static char *render_sigset_t(const char *header, sigset_t *set, char *buffer)
+static void render_sigset_t(struct seq_file *m, const char *header,
+ sigset_t *set)
{
- int i, len;
+ int i;
- len = strlen(header);
- memcpy(buffer, header, len);
- buffer += len;
+ seq_printf(m, "%s", header);
i = _NSIG;
do {
@@ -219,12 +220,10 @@ static char *render_sigset_t(const char *header, sigset_t
*set, char *buffer)
if (sigismember(set, i+2)) x |= 2;
if (sigismember(set, i+3)) x |= 4;
if (sigismember(set, i+4)) x |= 8;
- *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
+ seq_printf(m, "%x", x);
} while (i >= 4);
- *buffer++ = '\n';
- *buffer = 0;
- return buffer;
+ seq_printf(m, "\n");
}
static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
@@ -242,7 +241,7 @@ static void collect_sigign_sigcatch(struct task_struct *p,
sigset_t *ign,
}
}
-static inline char *task_sig(struct task_struct *p, char *buffer)
+static inline void task_sig(struct seq_file *m, struct task_struct *p)
{
unsigned long flags;
sigset_t pending, shpending, blocked, ignored, caught;
@@ -269,67 +268,66 @@ static inline char *task_sig(struct task_struct *p, char
*buffer)
}
rcu_read_unlock();
- buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
- buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
+ seq_printf(m, "Threads:\t%d\n", num_threads);
+ seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
/* render them all */
- buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
- buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
- buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
- buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
- buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
-
- return buffer;
+ render_sigset_t(m, "SigPnd:\t", &pending);
+ render_sigset_t(m, "ShdPnd:\t", &shpending);
+ render_sigset_t(m, "SigBlk:\t", &blocked);
+ render_sigset_t(m, "SigIgn:\t", &ignored);
+ render_sigset_t(m, "SigCgt:\t", &caught);
}
-static char *render_cap_t(const char *header, kernel_cap_t *a, char *buffer)
+static void render_cap_t(struct seq_file *m, const char *header,
+ kernel_cap_t *a)
{
unsigned __capi;
- buffer += sprintf(buffer, "%s", header);
+ seq_printf(m, "%s", header);
CAP_FOR_EACH_U32(__capi) {
- buffer += sprintf(buffer, "%08x",
- a->cap[(_LINUX_CAPABILITY_U32S-1) - __capi]);
+ seq_printf(m, "%08x",
+ a->cap[(_LINUX_CAPABILITY_U32S-1) - __capi]);
}
- return buffer + sprintf(buffer, "\n");
+ seq_printf(m, "\n");
}
-static inline char *task_cap(struct task_struct *p, char *buffer)
+static inline void task_cap(struct seq_file *m, struct task_struct *p)
{
- buffer = render_cap_t("CapInh:\t", &p->cap_inheritable, buffer);
- buffer = render_cap_t("CapPrm:\t", &p->cap_permitted, buffer);
- return render_cap_t("CapEff:\t", &p->cap_effective, buffer);
+ render_cap_t(m, "CapInh:\t", &p->cap_inheritable);
+ render_cap_t(m, "CapPrm:\t", &p->cap_permitted);
+ render_cap_t(m, "CapEff:\t", &p->cap_effective);
}
-static inline char *task_context_switch_counts(struct task_struct *p,
- char *buffer)
+static inline void task_context_switch_counts(struct seq_file *m,
+ struct task_struct *p)
{
- return buffer + sprintf(buffer, "voluntary_ctxt_switches:\t%lu\n"
- "nonvoluntary_ctxt_switches:\t%lu\n",
- p->nvcsw,
- p->nivcsw);
+ seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
+ "nonvoluntary_ctxt_switches:\t%lu\n",
+ p->nvcsw,
+ p->nivcsw);
}
-int proc_pid_status(struct task_struct *task, char *buffer)
+int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
{
- char *orig = buffer;
struct mm_struct *mm = get_task_mm(task);
- buffer = task_name(task, buffer);
- buffer = task_state(task, buffer);
+ task_name(m, task);
+ task_state(m, ns, pid, task);
if (mm) {
- buffer = task_mem(mm, buffer);
+ task_mem(m, mm);
mmput(mm);
}
- buffer = task_sig(task, buffer);
- buffer = task_cap(task, buffer);
- buffer = cpuset_task_status_allowed(task, buffer);
+ task_sig(m, task);
+ task_cap(m, task);
+ cpuset_task_status_allowed(m, task);
#if defined(CONFIG_S390)
- buffer = task_show_regs(task, buffer);
+ task_show_regs(m, task);
#endif
- buffer = task_context_switch_counts(task, buffer);
- return buffer - orig;
+ task_context_switch_counts(m, task);
+ return 0;
}
/*
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9c3e548..8a19a8a 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2274,7 +2274,7 @@ static const struct pid_entry tgid_base_stuff[] = {
DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
REG("environ", S_IRUSR, environ),
INF("auxv", S_IRUSR, pid_auxv),
- INF("status", S_IRUGO, pid_status),
+ ONE("status", S_IRUGO, pid_status),
INF("limits", S_IRUSR, pid_limits),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, pid_sched),
@@ -2605,7 +2605,7 @@ static const struct pid_entry tid_base_stuff[] = {
DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
REG("environ", S_IRUSR, environ),
INF("auxv", S_IRUSR, pid_auxv),
- INF("status", S_IRUGO, pid_status),
+ ONE("status", S_IRUGO, pid_status),
INF("limits", S_IRUSR, pid_limits),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, pid_sched),
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 45bdbfc..ea496ff 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -53,7 +53,8 @@ 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,
struct pid *pid, struct task_struct *task);
-extern int proc_pid_status(struct task_struct *, char *);
+extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task);
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);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 38338ed..a34c440 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -9,13 +9,14 @@
#include <linux/mempolicy.h>
#include <linux/swap.h>
#include <linux/swapops.h>
+#include <linux/seq_file.h>
#include <asm/elf.h>
#include <asm/uaccess.h>
#include <asm/tlbflush.h>
#include "internal.h"
-char *task_mem(struct mm_struct *mm, char *buffer)
+void task_mem(struct seq_file *m, struct mm_struct *mm)
{
unsigned long data, text, lib;
unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
@@ -37,7 +38,7 @@ char *task_mem(struct mm_struct *mm, char *buffer)
data = mm->total_vm - mm->shared_vm - mm->stack_vm;
text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
- buffer += sprintf(buffer,
+ seq_printf(m,
"VmPeak:\t%8lu kB\n"
"VmSize:\t%8lu kB\n"
"VmLck:\t%8lu kB\n"
@@ -56,7 +57,6 @@ char *task_mem(struct mm_struct *mm, char *buffer)
data << (PAGE_SHIFT-10),
mm->stack_vm << (PAGE_SHIFT-10), text, lib,
(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
- return buffer;
}
unsigned long task_vsize(struct mm_struct *mm)
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 1932c2c..cee0231 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -12,7 +12,7 @@
* each process that owns it. Non-shared memory is counted
* accurately.
*/
-char *task_mem(struct mm_struct *mm, char *buffer)
+void task_mem(struct seq_file *m, struct mm_struct *mm)
{
struct vm_list_struct *vml;
unsigned long bytes = 0, sbytes = 0, slack = 0;
@@ -58,14 +58,13 @@ char *task_mem(struct mm_struct *mm, char *buffer)
bytes += kobjsize(current); /* includes kernel stack */
- buffer += sprintf(buffer,
+ seq_printf(m,
"Mem:\t%8lu bytes\n"
"Slack:\t%8lu bytes\n"
"Shared:\t%8lu bytes\n",
bytes, slack, sbytes);
up_read(&mm->mmap_sem);
- return buffer;
}
unsigned long task_vsize(struct mm_struct *mm)
diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index 4f74460..dfec2d0 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -161,6 +161,7 @@ struct stack_frame {
/* Forward declaration, a strange C thing */
struct task_struct;
struct mm_struct;
+struct seq_file;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
@@ -177,7 +178,7 @@ extern unsigned long thread_saved_pc(struct task_struct *t);
/*
* Print register of task into buffer. Used in fs/proc/array.c.
*/
-extern char *task_show_regs(struct task_struct *task, char *buffer);
+extern void task_show_regs(struct seq_file *m, struct task_struct *task);
extern void show_registers(struct pt_regs *regs);
extern void show_code(struct pt_regs *regs);
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index ecae585..f8c9a27 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -57,7 +57,9 @@ extern int cpuset_memory_pressure_enabled;
extern void __cpuset_memory_pressure_bump(void);
extern const struct file_operations proc_cpuset_operations;
-extern char *cpuset_task_status_allowed(struct task_struct *task, char
*buffer);
+struct seq_file;
+extern void cpuset_task_status_allowed(struct seq_file *m,
+ struct task_struct *task);
extern void cpuset_lock(void);
extern void cpuset_unlock(void);
@@ -126,10 +128,9 @@ static inline int cpuset_mems_allowed_intersects(const
struct task_struct *tsk1,
static inline void cpuset_memory_pressure_bump(void) {}
-static inline char *cpuset_task_status_allowed(struct task_struct *task,
- char *buffer)
+static inline void cpuset_task_status_allowed(struct seq_file *m,
+ struct task_struct *task)
{
- return buffer;
}
static inline void cpuset_lock(void) {}
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index b04ebf0..e4a8f9a 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -118,7 +118,8 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct
dentry * dentry, struct
int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
unsigned long task_vsize(struct mm_struct *);
int task_statm(struct mm_struct *, int *, int *, int *, int *);
-char *task_mem(struct mm_struct *, char *);
+void task_mem(struct seq_file *, struct mm_struct *);
+void clear_refs_smap(struct mm_struct *mm);
struct proc_dir_entry *de_get(struct proc_dir_entry *de);
void de_put(struct proc_dir_entry *de);
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 67b2bfe..3e296ed 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2255,13 +2255,14 @@ const struct file_operations proc_cpuset_operations = {
#endif /* CONFIG_PROC_PID_CPUSET */
/* Display task cpus_allowed, mems_allowed in /proc/<pid>/status file. */
-char *cpuset_task_status_allowed(struct task_struct *task, char *buffer)
-{
- buffer += sprintf(buffer, "Cpus_allowed:\t");
- buffer += cpumask_scnprintf(buffer, PAGE_SIZE, task->cpus_allowed);
- buffer += sprintf(buffer, "\n");
- buffer += sprintf(buffer, "Mems_allowed:\t");
- buffer += nodemask_scnprintf(buffer, PAGE_SIZE, task->mems_allowed);
- buffer += sprintf(buffer, "\n");
- return buffer;
+void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
+{
+ seq_printf(m, "Cpus_allowed:\t");
+ m->count += cpumask_scnprintf(m->buf + m->count, m->size - m->count,
+ task->cpus_allowed);
+ seq_printf(m, "\n");
+ seq_printf(m, "Mems_allowed:\t");
+ m->count += nodemask_scnprintf(m->buf + m->count, m->size - m->count,
+ task->mems_allowed);
+ seq_printf(m, "\n");
}
-
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