mirror of https://gitee.com/openkylin/linux.git
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. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: another build fix] [akpm@linux-foundation.org: s390 build fix] [akpm@linux-foundation.org: fix task_name() output] [akpm@linux-foundation.org: fix nommu build] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Andrew Morgan <morgan@kernel.org> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Paul Jackson <pj@sgi.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric W. Biederman
Linus Torvalds
parent
a56d3fc74c
commit
df5f8314ca
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@ -24,6 +24,7 @@
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#include <linux/smp.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/seq_file.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/kdebug.h>
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@ -218,41 +219,40 @@ void show_registers(struct pt_regs *regs)
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}
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/* This is called from fs/proc/array.c */
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char *task_show_regs(struct task_struct *task, char *buffer)
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void task_show_regs(struct seq_file *m, struct task_struct *task)
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{
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struct pt_regs *regs;
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regs = task_pt_regs(task);
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buffer += sprintf(buffer, "task: %p, ksp: %p\n",
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seq_printf(m, "task: %p, ksp: %p\n",
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task, (void *)task->thread.ksp);
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buffer += sprintf(buffer, "User PSW : %p %p\n",
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seq_printf(m, "User PSW : %p %p\n",
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(void *) regs->psw.mask, (void *)regs->psw.addr);
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buffer += sprintf(buffer, "User GPRS: " FOURLONG,
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seq_printf(m, "User GPRS: " FOURLONG,
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regs->gprs[0], regs->gprs[1],
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regs->gprs[2], regs->gprs[3]);
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buffer += sprintf(buffer, " " FOURLONG,
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seq_printf(m, " " FOURLONG,
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regs->gprs[4], regs->gprs[5],
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regs->gprs[6], regs->gprs[7]);
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buffer += sprintf(buffer, " " FOURLONG,
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seq_printf(m, " " FOURLONG,
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regs->gprs[8], regs->gprs[9],
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regs->gprs[10], regs->gprs[11]);
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buffer += sprintf(buffer, " " FOURLONG,
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seq_printf(m, " " FOURLONG,
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regs->gprs[12], regs->gprs[13],
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regs->gprs[14], regs->gprs[15]);
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buffer += sprintf(buffer, "User ACRS: %08x %08x %08x %08x\n",
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seq_printf(m, "User ACRS: %08x %08x %08x %08x\n",
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task->thread.acrs[0], task->thread.acrs[1],
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task->thread.acrs[2], task->thread.acrs[3]);
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buffer += sprintf(buffer, " %08x %08x %08x %08x\n",
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seq_printf(m, " %08x %08x %08x %08x\n",
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task->thread.acrs[4], task->thread.acrs[5],
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task->thread.acrs[6], task->thread.acrs[7]);
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buffer += sprintf(buffer, " %08x %08x %08x %08x\n",
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seq_printf(m, " %08x %08x %08x %08x\n",
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task->thread.acrs[8], task->thread.acrs[9],
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task->thread.acrs[10], task->thread.acrs[11]);
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buffer += sprintf(buffer, " %08x %08x %08x %08x\n",
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seq_printf(m, " %08x %08x %08x %08x\n",
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task->thread.acrs[12], task->thread.acrs[13],
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task->thread.acrs[14], task->thread.acrs[15]);
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return buffer;
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}
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static DEFINE_SPINLOCK(die_lock);
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120
fs/proc/array.c
120
fs/proc/array.c
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@ -89,18 +89,21 @@
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do { memcpy(buffer, string, strlen(string)); \
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buffer += strlen(string); } while (0)
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static inline char *task_name(struct task_struct *p, char *buf)
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static inline void task_name(struct seq_file *m, struct task_struct *p)
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{
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int i;
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char *buf, *end;
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char *name;
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char tcomm[sizeof(p->comm)];
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get_task_comm(tcomm, p);
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ADDBUF(buf, "Name:\t");
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seq_printf(m, "Name:\t");
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end = m->buf + m->size;
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buf = m->buf + m->count;
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name = tcomm;
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i = sizeof(tcomm);
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do {
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while (i && (buf < end)) {
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unsigned char c = *name;
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name++;
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i--;
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@ -108,20 +111,21 @@ static inline char *task_name(struct task_struct *p, char *buf)
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if (!c)
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break;
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if (c == '\\') {
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buf[1] = c;
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buf += 2;
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buf++;
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if (buf < end)
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*buf++ = c;
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continue;
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}
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if (c == '\n') {
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buf[0] = '\\';
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buf[1] = 'n';
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buf += 2;
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*buf++ = '\\';
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if (buf < end)
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*buf++ = 'n';
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continue;
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}
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buf++;
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} while (i);
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*buf = '\n';
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return buf+1;
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}
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m->count = buf - m->buf;
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seq_printf(m, "\n");
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}
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/*
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@ -152,21 +156,20 @@ static inline const char *get_task_state(struct task_struct *tsk)
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return *p;
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}
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static inline char *task_state(struct task_struct *p, char *buffer)
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static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *p)
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{
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struct group_info *group_info;
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int g;
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struct fdtable *fdt = NULL;
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struct pid_namespace *ns;
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pid_t ppid, tpid;
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ns = current->nsproxy->pid_ns;
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rcu_read_lock();
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ppid = pid_alive(p) ?
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task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
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tpid = pid_alive(p) && p->ptrace ?
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task_pid_nr_ns(rcu_dereference(p->parent), ns) : 0;
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buffer += sprintf(buffer,
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seq_printf(m,
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"State:\t%s\n"
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"Tgid:\t%d\n"
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"Pid:\t%d\n"
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@ -176,7 +179,7 @@ static inline char *task_state(struct task_struct *p, char *buffer)
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"Gid:\t%d\t%d\t%d\t%d\n",
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get_task_state(p),
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task_tgid_nr_ns(p, ns),
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task_pid_nr_ns(p, ns),
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pid_nr_ns(pid, ns),
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ppid, tpid,
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p->uid, p->euid, p->suid, p->fsuid,
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p->gid, p->egid, p->sgid, p->fsgid);
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@ -184,7 +187,7 @@ static inline char *task_state(struct task_struct *p, char *buffer)
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task_lock(p);
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if (p->files)
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fdt = files_fdtable(p->files);
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buffer += sprintf(buffer,
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seq_printf(m,
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"FDSize:\t%d\n"
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"Groups:\t",
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fdt ? fdt->max_fds : 0);
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@ -195,20 +198,18 @@ static inline char *task_state(struct task_struct *p, char *buffer)
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task_unlock(p);
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for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
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buffer += sprintf(buffer, "%d ", GROUP_AT(group_info, g));
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seq_printf(m, "%d ", GROUP_AT(group_info, g));
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put_group_info(group_info);
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buffer += sprintf(buffer, "\n");
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return buffer;
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seq_printf(m, "\n");
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}
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static char *render_sigset_t(const char *header, sigset_t *set, char *buffer)
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static void render_sigset_t(struct seq_file *m, const char *header,
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sigset_t *set)
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{
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int i, len;
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int i;
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len = strlen(header);
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memcpy(buffer, header, len);
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buffer += len;
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seq_printf(m, "%s", header);
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i = _NSIG;
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do {
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@ -219,12 +220,10 @@ static char *render_sigset_t(const char *header, sigset_t *set, char *buffer)
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if (sigismember(set, i+2)) x |= 2;
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if (sigismember(set, i+3)) x |= 4;
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if (sigismember(set, i+4)) x |= 8;
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*buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
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seq_printf(m, "%x", x);
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} while (i >= 4);
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*buffer++ = '\n';
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*buffer = 0;
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return buffer;
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seq_printf(m, "\n");
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}
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static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
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@ -242,7 +241,7 @@ static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
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}
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}
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static inline char *task_sig(struct task_struct *p, char *buffer)
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static inline void task_sig(struct seq_file *m, struct task_struct *p)
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{
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unsigned long flags;
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sigset_t pending, shpending, blocked, ignored, caught;
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@ -269,67 +268,66 @@ static inline char *task_sig(struct task_struct *p, char *buffer)
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}
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rcu_read_unlock();
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buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
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buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
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seq_printf(m, "Threads:\t%d\n", num_threads);
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seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
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/* render them all */
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buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
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buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
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buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
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buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
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buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
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return buffer;
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render_sigset_t(m, "SigPnd:\t", &pending);
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render_sigset_t(m, "ShdPnd:\t", &shpending);
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render_sigset_t(m, "SigBlk:\t", &blocked);
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render_sigset_t(m, "SigIgn:\t", &ignored);
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render_sigset_t(m, "SigCgt:\t", &caught);
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}
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static char *render_cap_t(const char *header, kernel_cap_t *a, char *buffer)
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static void render_cap_t(struct seq_file *m, const char *header,
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kernel_cap_t *a)
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{
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unsigned __capi;
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buffer += sprintf(buffer, "%s", header);
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seq_printf(m, "%s", header);
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CAP_FOR_EACH_U32(__capi) {
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buffer += sprintf(buffer, "%08x",
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seq_printf(m, "%08x",
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a->cap[(_LINUX_CAPABILITY_U32S-1) - __capi]);
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}
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return buffer + sprintf(buffer, "\n");
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seq_printf(m, "\n");
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}
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static inline char *task_cap(struct task_struct *p, char *buffer)
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static inline void task_cap(struct seq_file *m, struct task_struct *p)
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{
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buffer = render_cap_t("CapInh:\t", &p->cap_inheritable, buffer);
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buffer = render_cap_t("CapPrm:\t", &p->cap_permitted, buffer);
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return render_cap_t("CapEff:\t", &p->cap_effective, buffer);
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render_cap_t(m, "CapInh:\t", &p->cap_inheritable);
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render_cap_t(m, "CapPrm:\t", &p->cap_permitted);
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render_cap_t(m, "CapEff:\t", &p->cap_effective);
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}
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static inline char *task_context_switch_counts(struct task_struct *p,
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char *buffer)
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static inline void task_context_switch_counts(struct seq_file *m,
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struct task_struct *p)
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{
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return buffer + sprintf(buffer, "voluntary_ctxt_switches:\t%lu\n"
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seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
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"nonvoluntary_ctxt_switches:\t%lu\n",
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p->nvcsw,
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p->nivcsw);
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}
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int proc_pid_status(struct task_struct *task, char *buffer)
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int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task)
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{
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char *orig = buffer;
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struct mm_struct *mm = get_task_mm(task);
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buffer = task_name(task, buffer);
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buffer = task_state(task, buffer);
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task_name(m, task);
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task_state(m, ns, pid, task);
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if (mm) {
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buffer = task_mem(mm, buffer);
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task_mem(m, mm);
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mmput(mm);
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}
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buffer = task_sig(task, buffer);
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buffer = task_cap(task, buffer);
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buffer = cpuset_task_status_allowed(task, buffer);
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task_sig(m, task);
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task_cap(m, task);
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cpuset_task_status_allowed(m, task);
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#if defined(CONFIG_S390)
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buffer = task_show_regs(task, buffer);
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task_show_regs(m, task);
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#endif
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buffer = task_context_switch_counts(task, buffer);
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return buffer - orig;
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task_context_switch_counts(m, task);
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return 0;
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}
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/*
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@ -2274,7 +2274,7 @@ static const struct pid_entry tgid_base_stuff[] = {
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DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
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REG("environ", S_IRUSR, environ),
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INF("auxv", S_IRUSR, pid_auxv),
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INF("status", S_IRUGO, pid_status),
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ONE("status", S_IRUGO, pid_status),
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INF("limits", S_IRUSR, pid_limits),
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#ifdef CONFIG_SCHED_DEBUG
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REG("sched", S_IRUGO|S_IWUSR, pid_sched),
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@ -2605,7 +2605,7 @@ static const struct pid_entry tid_base_stuff[] = {
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DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
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REG("environ", S_IRUSR, environ),
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INF("auxv", S_IRUSR, pid_auxv),
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INF("status", S_IRUGO, pid_status),
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ONE("status", S_IRUGO, pid_status),
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INF("limits", S_IRUSR, pid_limits),
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#ifdef CONFIG_SCHED_DEBUG
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REG("sched", S_IRUGO|S_IWUSR, pid_sched),
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@ -53,7 +53,8 @@ extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_pid_status(struct task_struct *, char *);
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extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
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@ -9,13 +9,14 @@
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#include <linux/mempolicy.h>
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#include <linux/swap.h>
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#include <linux/swapops.h>
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#include <linux/seq_file.h>
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#include <asm/elf.h>
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#include <asm/uaccess.h>
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#include <asm/tlbflush.h>
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#include "internal.h"
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char *task_mem(struct mm_struct *mm, char *buffer)
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void task_mem(struct seq_file *m, struct mm_struct *mm)
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{
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unsigned long data, text, lib;
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unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
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@ -37,7 +38,7 @@ char *task_mem(struct mm_struct *mm, char *buffer)
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data = mm->total_vm - mm->shared_vm - mm->stack_vm;
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text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
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lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
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buffer += sprintf(buffer,
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seq_printf(m,
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"VmPeak:\t%8lu kB\n"
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"VmSize:\t%8lu kB\n"
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"VmLck:\t%8lu kB\n"
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@ -56,7 +57,6 @@ char *task_mem(struct mm_struct *mm, char *buffer)
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data << (PAGE_SHIFT-10),
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mm->stack_vm << (PAGE_SHIFT-10), text, lib,
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(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
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return buffer;
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}
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unsigned long task_vsize(struct mm_struct *mm)
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@ -12,7 +12,7 @@
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* each process that owns it. Non-shared memory is counted
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* accurately.
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*/
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char *task_mem(struct mm_struct *mm, char *buffer)
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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)
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
|
|
|||
|
|
@ -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) {}
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
|
|
|||
|
|
@ -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)
|
||||
void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
|
||||
{
|
||||
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;
|
||||
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");
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue