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-rw-r--r--fs/proc/array.c16
-rw-r--r--fs/proc/base.c74
-rw-r--r--fs/proc/generic.c54
-rw-r--r--fs/proc/inode.c5
-rw-r--r--fs/proc/kcore.c6
-rw-r--r--fs/proc/kmsg.c15
-rw-r--r--fs/proc/nommu.c1
-rw-r--r--fs/proc/proc_devtree.c11
-rw-r--r--fs/proc/proc_net.c1
-rw-r--r--fs/proc/root.c7
-rw-r--r--fs/proc/stat.c1
-rw-r--r--fs/proc/task_mmu.c151
-rw-r--r--fs/proc/task_nommu.c21
-rw-r--r--fs/proc/vmcore.c2
14 files changed, 180 insertions, 185 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 13b5d0708175..fff6572676ae 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -68,7 +68,6 @@
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
-#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/signal.h>
#include <linux/highmem.h>
@@ -82,7 +81,6 @@
#include <linux/pid_namespace.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
-#include <linux/swapops.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
@@ -178,7 +176,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
if (tracer)
tpid = task_pid_nr_ns(tracer, ns);
}
- cred = get_cred((struct cred *) __task_cred(p));
+ cred = get_task_cred(p);
seq_printf(m,
"State:\t%s\n"
"Tgid:\t%d\n"
@@ -269,9 +267,11 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
shpending = p->signal->shared_pending.signal;
blocked = p->blocked;
collect_sigign_sigcatch(p, &ignored, &caught);
- num_threads = atomic_read(&p->signal->count);
+ num_threads = get_nr_threads(p);
+ rcu_read_lock(); /* FIXME: is this correct? */
qsize = atomic_read(&__task_cred(p)->user->sigpending);
- qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
+ rcu_read_unlock();
+ qlim = task_rlimit(p, RLIMIT_SIGPENDING);
unlock_task_sighand(p, &flags);
}
@@ -410,7 +410,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
tty_nr = new_encode_dev(tty_devnum(sig->tty));
}
- num_threads = atomic_read(&sig->count);
+ num_threads = get_nr_threads(task);
collect_sigign_sigcatch(task, &sigign, &sigcatch);
cmin_flt = sig->cmin_flt;
@@ -418,7 +418,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
cutime = sig->cutime;
cstime = sig->cstime;
cgtime = sig->cgtime;
- rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
+ rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur);
/* add up live thread stats at the group level */
if (whole) {
@@ -494,7 +494,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
rsslim,
mm ? mm->start_code : 0,
mm ? mm->end_code : 0,
- (permitted && mm) ? task->stack_start : 0,
+ (permitted && mm) ? mm->start_stack : 0,
esp,
eip,
/* The signal information here is obsolete.
diff --git a/fs/proc/base.c b/fs/proc/base.c
index e42bbd843ed1..acb7ef80ea4f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -81,6 +81,7 @@
#include <linux/elf.h>
#include <linux/pid_namespace.h>
#include <linux/fs_struct.h>
+#include <linux/slab.h>
#include "internal.h"
/* NOTE:
@@ -165,18 +166,6 @@ static int get_fs_path(struct task_struct *task, struct path *path, bool root)
return result;
}
-static int get_nr_threads(struct task_struct *tsk)
-{
- unsigned long flags;
- int count = 0;
-
- if (lock_task_sighand(tsk, &flags)) {
- count = atomic_read(&tsk->signal->count);
- unlock_task_sighand(tsk, &flags);
- }
- return count;
-}
-
static int proc_cwd_link(struct inode *inode, struct path *path)
{
struct task_struct *task = get_proc_task(inode);
@@ -442,12 +431,13 @@ static const struct file_operations proc_lstats_operations = {
unsigned long badness(struct task_struct *p, unsigned long uptime);
static int proc_oom_score(struct task_struct *task, char *buffer)
{
- unsigned long points;
+ unsigned long points = 0;
struct timespec uptime;
do_posix_clock_monotonic_gettime(&uptime);
read_lock(&tasklist_lock);
- points = badness(task->group_leader, uptime.tv_sec);
+ if (pid_alive(task))
+ points = badness(task, uptime.tv_sec);
read_unlock(&tasklist_lock);
return sprintf(buffer, "%lu\n", points);
}
@@ -647,17 +637,11 @@ static int mounts_release(struct inode *inode, struct file *file)
static unsigned mounts_poll(struct file *file, poll_table *wait)
{
struct proc_mounts *p = file->private_data;
- struct mnt_namespace *ns = p->ns;
unsigned res = POLLIN | POLLRDNORM;
- poll_wait(file, &ns->poll, wait);
-
- spin_lock(&vfsmount_lock);
- if (p->event != ns->event) {
- p->event = ns->event;
+ poll_wait(file, &p->ns->poll, wait);
+ if (mnt_had_events(p))
res |= POLLERR | POLLPRI;
- }
- spin_unlock(&vfsmount_lock);
return res;
}
@@ -734,6 +718,7 @@ out_no_task:
static const struct file_operations proc_info_file_operations = {
.read = proc_info_read,
+ .llseek = generic_file_llseek,
};
static int proc_single_show(struct seq_file *m, void *v)
@@ -991,6 +976,7 @@ out_no_task:
static const struct file_operations proc_environ_operations = {
.read = environ_read,
+ .llseek = generic_file_llseek,
};
static ssize_t oom_adjust_read(struct file *file, char __user *buf,
@@ -1064,6 +1050,7 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
static const struct file_operations proc_oom_adjust_operations = {
.read = oom_adjust_read,
.write = oom_adjust_write,
+ .llseek = generic_file_llseek,
};
#ifdef CONFIG_AUDITSYSCALL
@@ -1095,8 +1082,12 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
if (!capable(CAP_AUDIT_CONTROL))
return -EPERM;
- if (current != pid_task(proc_pid(inode), PIDTYPE_PID))
+ rcu_read_lock();
+ if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) {
+ rcu_read_unlock();
return -EPERM;
+ }
+ rcu_read_unlock();
if (count >= PAGE_SIZE)
count = PAGE_SIZE - 1;
@@ -1131,6 +1122,7 @@ out_free_page:
static const struct file_operations proc_loginuid_operations = {
.read = proc_loginuid_read,
.write = proc_loginuid_write,
+ .llseek = generic_file_llseek,
};
static ssize_t proc_sessionid_read(struct file * file, char __user * buf,
@@ -1151,6 +1143,7 @@ static ssize_t proc_sessionid_read(struct file * file, char __user * buf,
static const struct file_operations proc_sessionid_operations = {
.read = proc_sessionid_read,
+ .llseek = generic_file_llseek,
};
#endif
@@ -1202,6 +1195,7 @@ static ssize_t proc_fault_inject_write(struct file * file,
static const struct file_operations proc_fault_inject_operations = {
.read = proc_fault_inject_read,
.write = proc_fault_inject_write,
+ .llseek = generic_file_llseek,
};
#endif
@@ -1943,7 +1937,7 @@ static ssize_t proc_fdinfo_read(struct file *file, char __user *buf,
}
static const struct file_operations proc_fdinfo_file_operations = {
- .open = nonseekable_open,
+ .open = nonseekable_open,
.read = proc_fdinfo_read,
};
@@ -2227,6 +2221,7 @@ out_no_task:
static const struct file_operations proc_pid_attr_operations = {
.read = proc_pid_attr_read,
.write = proc_pid_attr_write,
+ .llseek = generic_file_llseek,
};
static const struct pid_entry attr_dir_stuff[] = {
@@ -2347,6 +2342,7 @@ static ssize_t proc_coredump_filter_write(struct file *file,
static const struct file_operations proc_coredump_filter_operations = {
.read = proc_coredump_filter_read,
.write = proc_coredump_filter_write,
+ .llseek = generic_file_llseek,
};
#endif
@@ -2369,16 +2365,30 @@ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct pid_namespace *ns = dentry->d_sb->s_fs_info;
pid_t tgid = task_tgid_nr_ns(current, ns);
- char tmp[PROC_NUMBUF];
- if (!tgid)
- return ERR_PTR(-ENOENT);
- sprintf(tmp, "%d", task_tgid_nr_ns(current, ns));
- return ERR_PTR(vfs_follow_link(nd,tmp));
+ char *name = ERR_PTR(-ENOENT);
+ if (tgid) {
+ name = __getname();
+ if (!name)
+ name = ERR_PTR(-ENOMEM);
+ else
+ sprintf(name, "%d", tgid);
+ }
+ nd_set_link(nd, name);
+ return NULL;
+}
+
+static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd,
+ void *cookie)
+{
+ char *s = nd_get_link(nd);
+ if (!IS_ERR(s))
+ __putname(s);
}
static const struct inode_operations proc_self_inode_operations = {
.readlink = proc_self_readlink,
.follow_link = proc_self_follow_link,
+ .put_link = proc_self_put_link,
};
/*
@@ -2422,7 +2432,7 @@ static struct dentry *proc_base_instantiate(struct inode *dir,
const struct pid_entry *p = ptr;
struct inode *inode;
struct proc_inode *ei;
- struct dentry *error = ERR_PTR(-EINVAL);
+ struct dentry *error;
/* Allocate the inode */
error = ERR_PTR(-ENOMEM);
@@ -2772,7 +2782,7 @@ out:
struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
{
- struct dentry *result = ERR_PTR(-ENOENT);
+ struct dentry *result;
struct task_struct *task;
unsigned tgid;
struct pid_namespace *ns;
@@ -2895,7 +2905,7 @@ out_no_task:
*/
static const struct pid_entry tid_base_stuff[] = {
DIR("fd", S_IRUSR|S_IXUSR, proc_fd_inode_operations, proc_fd_operations),
- DIR("fdinfo", S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fd_operations),
+ DIR("fdinfo", S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fdinfo_operations),
REG("environ", S_IRUSR, proc_environ_operations),
INF("auxv", S_IRUSR, proc_pid_auxv),
ONE("status", S_IRUGO, proc_pid_status),
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 480cb1065eec..2791907744ed 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -13,6 +13,7 @@
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <linux/mount.h>
#include <linux/init.h>
#include <linux/idr.h>
@@ -291,19 +292,17 @@ static const struct inode_operations proc_file_inode_operations = {
* returns the struct proc_dir_entry for "/proc/tty/driver", and
* returns "serial" in residual.
*/
-static int xlate_proc_name(const char *name,
- struct proc_dir_entry **ret, const char **residual)
+static int __xlate_proc_name(const char *name, struct proc_dir_entry **ret,
+ const char **residual)
{
const char *cp = name, *next;
struct proc_dir_entry *de;
int len;
- int rtn = 0;
de = *ret;
if (!de)
de = &proc_root;
- spin_lock(&proc_subdir_lock);
while (1) {
next = strchr(cp, '/');
if (!next)
@@ -315,16 +314,25 @@ static int xlate_proc_name(const char *name,
break;
}
if (!de) {
- rtn = -ENOENT;
- goto out;
+ WARN(1, "name '%s'\n", name);
+ return -ENOENT;
}
cp += len + 1;
}
*residual = cp;
*ret = de;
-out:
+ return 0;
+}
+
+static int xlate_proc_name(const char *name, struct proc_dir_entry **ret,
+ const char **residual)
+{
+ int rv;
+
+ spin_lock(&proc_subdir_lock);
+ rv = __xlate_proc_name(name, ret, residual);
spin_unlock(&proc_subdir_lock);
- return rtn;
+ return rv;
}
static DEFINE_IDA(proc_inum_ida);
@@ -335,21 +343,6 @@ static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
/*
* Return an inode number between PROC_DYNAMIC_FIRST and
* 0xffffffff, or zero on failure.
- *
- * Current inode allocations in the proc-fs (hex-numbers):
- *
- * 00000000 reserved
- * 00000001-00000fff static entries (goners)
- * 001 root-ino
- *
- * 00001000-00001fff unused
- * 0001xxxx-7fffxxxx pid-dir entries for pid 1-7fff
- * 80000000-efffffff unused
- * f0000000-ffffffff dynamic entries
- *
- * Goal:
- * Once we split the thing into several virtual filesystems,
- * we will get rid of magical ranges (and this comment, BTW).
*/
static unsigned int get_inode_number(void)
{
@@ -662,6 +655,7 @@ struct proc_dir_entry *proc_symlink(const char *name,
}
return ent;
}
+EXPORT_SYMBOL(proc_symlink);
struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
struct proc_dir_entry *parent)
@@ -700,6 +694,7 @@ struct proc_dir_entry *proc_mkdir(const char *name,
{
return proc_mkdir_mode(name, S_IRUGO | S_IXUGO, parent);
}
+EXPORT_SYMBOL(proc_mkdir);
struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
struct proc_dir_entry *parent)
@@ -728,6 +723,7 @@ struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
}
return ent;
}
+EXPORT_SYMBOL(create_proc_entry);
struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
struct proc_dir_entry *parent,
@@ -762,6 +758,7 @@ out_free:
out:
return NULL;
}
+EXPORT_SYMBOL(proc_create_data);
static void free_proc_entry(struct proc_dir_entry *de)
{
@@ -793,11 +790,13 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
const char *fn = name;
int len;
- if (xlate_proc_name(name, &parent, &fn) != 0)
+ spin_lock(&proc_subdir_lock);
+ if (__xlate_proc_name(name, &parent, &fn) != 0) {
+ spin_unlock(&proc_subdir_lock);
return;
+ }
len = strlen(fn);
- spin_lock(&proc_subdir_lock);
for (p = &parent->subdir; *p; p=&(*p)->next ) {
if (proc_match(len, fn, *p)) {
de = *p;
@@ -807,8 +806,10 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
}
}
spin_unlock(&proc_subdir_lock);
- if (!de)
+ if (!de) {
+ WARN(1, "name '%s'\n", name);
return;
+ }
spin_lock(&de->pde_unload_lock);
/*
@@ -853,3 +854,4 @@ continue_removing:
de->parent->name, de->name, de->subdir->name);
pde_put(de);
}
+EXPORT_SYMBOL(remove_proc_entry);
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 445a02bcaab3..aea8502e58a3 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/smp_lock.h>
#include <linux/sysctl.h>
+#include <linux/slab.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -231,9 +232,9 @@ static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne
if (rv == -ENOIOCTLCMD)
rv = -EINVAL;
} else if (ioctl) {
- lock_kernel();
+ WARN_ONCE(1, "Procfs ioctl handlers must use unlocked_ioctl, "
+ "%pf will be called without the Bkl held\n", ioctl);
rv = ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
- unlock_kernel();
}
pde_users_dec(pde);
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index a44a7897fd4d..6f37c391468d 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -19,6 +19,7 @@
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/list.h>
@@ -490,7 +491,7 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
}
read_unlock(&kclist_lock);
- if (m == NULL) {
+ if (&m->list == &kclist_head) {
if (clear_user(buffer, tsz))
return -EFAULT;
} else if (is_vmalloc_or_module_addr((void *)start)) {
@@ -557,6 +558,7 @@ static int open_kcore(struct inode *inode, struct file *filp)
static const struct file_operations proc_kcore_operations = {
.read = read_kcore,
.open = open_kcore,
+ .llseek = generic_file_llseek,
};
#ifdef CONFIG_MEMORY_HOTPLUG
@@ -586,7 +588,7 @@ static struct kcore_list kcore_text;
*/
static void __init proc_kcore_text_init(void)
{
- kclist_add(&kcore_text, _stext, _end - _stext, KCORE_TEXT);
+ kclist_add(&kcore_text, _text, _end - _text, KCORE_TEXT);
}
#else
static void __init proc_kcore_text_init(void)
diff --git a/fs/proc/kmsg.c b/fs/proc/kmsg.c
index 7ca78346d3f0..bd4b5a740ff1 100644
--- a/fs/proc/kmsg.c
+++ b/fs/proc/kmsg.c
@@ -12,37 +12,37 @@
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/fs.h>
+#include <linux/syslog.h>
#include <asm/uaccess.h>
#include <asm/io.h>
extern wait_queue_head_t log_wait;
-extern int do_syslog(int type, char __user *bug, int count);
-
static int kmsg_open(struct inode * inode, struct file * file)
{
- return do_syslog(1,NULL,0);
+ return do_syslog(SYSLOG_ACTION_OPEN, NULL, 0, SYSLOG_FROM_FILE);
}
static int kmsg_release(struct inode * inode, struct file * file)
{
- (void) do_syslog(0,NULL,0);
+ (void) do_syslog(SYSLOG_ACTION_CLOSE, NULL, 0, SYSLOG_FROM_FILE);
return 0;
}
static ssize_t kmsg_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
+ if ((file->f_flags & O_NONBLOCK) &&
+ !do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_FILE))
return -EAGAIN;
- return do_syslog(2, buf, count);
+ return do_syslog(SYSLOG_ACTION_READ, buf, count, SYSLOG_FROM_FILE);
}
static unsigned int kmsg_poll(struct file *file, poll_table *wait)
{
poll_wait(file, &log_wait, wait);
- if (do_syslog(9, NULL, 0))
+ if (do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_FILE))
return POLLIN | POLLRDNORM;
return 0;
}
@@ -53,6 +53,7 @@ static const struct file_operations proc_kmsg_operations = {
.poll = kmsg_poll,
.open = kmsg_open,
.release = kmsg_release,
+ .llseek = generic_file_llseek,
};
static int __init proc_kmsg_init(void)
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index 9fe7d7ebe115..b1822dde55c2 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -21,7 +21,6 @@
#include <linux/mmzone.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
-#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/hugetlb.h>
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index 123257bb356b..d9396a4fc7ff 100644
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -10,16 +10,20 @@
#include <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/string.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/slab.h>
#include <asm/prom.h>
#include <asm/uaccess.h>
#include "internal.h"
-#ifndef HAVE_ARCH_DEVTREE_FIXUPS
static inline void set_node_proc_entry(struct device_node *np,
struct proc_dir_entry *de)
{
-}
+#ifdef HAVE_ARCH_DEVTREE_FIXUPS
+ np->pde = de;
#endif
+}
static struct proc_dir_entry *proc_device_tree;
@@ -205,6 +209,9 @@ void proc_device_tree_add_node(struct device_node *np,
for (pp = np->properties; pp != NULL; pp = pp->next) {
p = pp->name;
+ if (strchr(p, '/'))
+ continue;
+
if (duplicate_name(de, p))
p = fixup_name(np, de, p);
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 04d1270f1c38..9020ac15baaa 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -14,6 +14,7 @@
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/module.h>
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b791d9e3..4258384ed22d 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -110,7 +110,6 @@ void __init proc_root_init(void)
if (err)
return;
proc_mnt = kern_mount_data(&proc_fs_type, &init_pid_ns);
- err = PTR_ERR(proc_mnt);
if (IS_ERR(proc_mnt)) {
unregister_filesystem(&proc_fs_type);
return;
@@ -220,9 +219,3 @@ void pid_ns_release_proc(struct pid_namespace *ns)
{
mntput(ns->proc_mnt);
}
-
-EXPORT_SYMBOL(proc_symlink);
-EXPORT_SYMBOL(proc_mkdir);
-EXPORT_SYMBOL(create_proc_entry);
-EXPORT_SYMBOL(proc_create_data);
-EXPORT_SYMBOL(remove_proc_entry);
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index b9b7aad2003d..bf31b03fc275 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -1,6 +1,5 @@
#include <linux/cpumask.h>
#include <linux/fs.h>
-#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index f277c4a111cb..aea1d3f1ffb5 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -4,6 +4,7 @@
#include <linux/seq_file.h>
#include <linux/highmem.h>
#include <linux/ptrace.h>
+#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/mempolicy.h>
#include <linux/swap.h>
@@ -16,7 +17,7 @@
void task_mem(struct seq_file *m, struct mm_struct *mm)
{
- unsigned long data, text, lib;
+ unsigned long data, text, lib, swap;
unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
/*
@@ -36,6 +37,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
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;
+ swap = get_mm_counter(mm, MM_SWAPENTS);
seq_printf(m,
"VmPeak:\t%8lu kB\n"
"VmSize:\t%8lu kB\n"
@@ -46,7 +48,8 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
"VmStk:\t%8lu kB\n"
"VmExe:\t%8lu kB\n"
"VmLib:\t%8lu kB\n"
- "VmPTE:\t%8lu kB\n",
+ "VmPTE:\t%8lu kB\n"
+ "VmSwap:\t%8lu kB\n",
hiwater_vm << (PAGE_SHIFT-10),
(total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
mm->locked_vm << (PAGE_SHIFT-10),
@@ -54,7 +57,8 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
total_rss << (PAGE_SHIFT-10),
data << (PAGE_SHIFT-10),
mm->stack_vm << (PAGE_SHIFT-10), text, lib,
- (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
+ (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10,
+ swap << (PAGE_SHIFT-10));
}
unsigned long task_vsize(struct mm_struct *mm)
@@ -65,11 +69,11 @@ unsigned long task_vsize(struct mm_struct *mm)
int task_statm(struct mm_struct *mm, int *shared, int *text,
int *data, int *resident)
{
- *shared = get_mm_counter(mm, file_rss);
+ *shared = get_mm_counter(mm, MM_FILEPAGES);
*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
>> PAGE_SHIFT;
*data = mm->total_vm - mm->shared_vm;
- *resident = *shared + get_mm_counter(mm, anon_rss);
+ *resident = *shared + get_mm_counter(mm, MM_ANONPAGES);
return mm->total_vm;
}
@@ -243,25 +247,6 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
} else if (vma->vm_start <= mm->start_stack &&
vma->vm_end >= mm->start_stack) {
name = "[stack]";
- } else {
- unsigned long stack_start;
- struct proc_maps_private *pmp;
-
- pmp = m->private;
- stack_start = pmp->task->stack_start;
-
- if (vma->vm_start <= stack_start &&
- vma->vm_end >= stack_start) {
- pad_len_spaces(m, len);
- seq_printf(m,
- "[threadstack:%08lx]",
-#ifdef CONFIG_STACK_GROWSUP
- vma->vm_end - stack_start
-#else
- stack_start - vma->vm_start
-#endif
- );
- }
}
} else {
name = "[vdso]";
@@ -403,6 +388,7 @@ static int show_smap(struct seq_file *m, void *v)
memset(&mss, 0, sizeof mss);
mss.vma = vma;
+ /* mmap_sem is held in m_start */
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
@@ -549,7 +535,8 @@ const struct file_operations proc_clear_refs_operations = {
};
struct pagemapread {
- u64 __user *out, *end;
+ int pos, len;
+ u64 *buffer;
};
#define PM_ENTRY_BYTES sizeof(u64)
@@ -572,10 +559,8 @@ struct pagemapread {
static int add_to_pagemap(unsigned long addr, u64 pfn,
struct pagemapread *pm)
{
- if (put_user(pfn, pm->out))
- return -EFAULT;
- pm->out++;
- if (pm->out >= pm->end)
+ pm->buffer[pm->pos++] = pfn;
+ if (pm->pos >= pm->len)
return PM_END_OF_BUFFER;
return 0;
}
@@ -649,6 +634,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
return err;
}
+#ifdef CONFIG_HUGETLB_PAGE
static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
{
u64 pme = 0;
@@ -658,31 +644,18 @@ static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
return pme;
}
-static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
- unsigned long end, struct mm_walk *walk)
+/* This function walks within one hugetlb entry in the single call */
+static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
+ unsigned long addr, unsigned long end,
+ struct mm_walk *walk)
{
- struct vm_area_struct *vma;
struct pagemapread *pm = walk->private;
- struct hstate *hs = NULL;
int err = 0;
+ u64 pfn;
- vma = find_vma(walk->mm, addr);
- if (vma)
- hs = hstate_vma(vma);
for (; addr != end; addr += PAGE_SIZE) {
- u64 pfn = PM_NOT_PRESENT;
-
- if (vma && (addr >= vma->vm_end)) {
- vma = find_vma(walk->mm, addr);
- if (vma)
- hs = hstate_vma(vma);
- }
-
- if (vma && (vma->vm_start <= addr) && is_vm_hugetlb_page(vma)) {
- /* calculate pfn of the "raw" page in the hugepage. */
- int offset = (addr & ~huge_page_mask(hs)) >> PAGE_SHIFT;
- pfn = huge_pte_to_pagemap_entry(*pte, offset);
- }
+ int offset = (addr & ~hmask) >> PAGE_SHIFT;
+ pfn = huge_pte_to_pagemap_entry(*pte, offset);
err = add_to_pagemap(addr, pfn, pm);
if (err)
return err;
@@ -692,6 +665,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
return err;
}
+#endif /* HUGETLB_PAGE */
/*
* /proc/pid/pagemap - an array mapping virtual pages to pfns
@@ -717,21 +691,20 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
* determine which areas of memory are actually mapped and llseek to
* skip over unmapped regions.
*/
+#define PAGEMAP_WALK_SIZE (PMD_SIZE)
static ssize_t pagemap_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
- struct page **pages, *page;
- unsigned long uaddr, uend;
struct mm_struct *mm;
struct pagemapread pm;
- int pagecount;
int ret = -ESRCH;
struct mm_walk pagemap_walk = {};
unsigned long src;
unsigned long svpfn;
unsigned long start_vaddr;
unsigned long end_vaddr;
+ int copied = 0;
if (!task)
goto out;
@@ -754,38 +727,17 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
if (!mm)
goto out_task;
-
- uaddr = (unsigned long)buf & PAGE_MASK;
- uend = (unsigned long)(buf + count);
- pagecount = (PAGE_ALIGN(uend) - uaddr) / PAGE_SIZE;
- ret = 0;
- if (pagecount == 0)
- goto out_mm;
- pages = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL);
+ pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
+ pm.buffer = kmalloc(pm.len, GFP_TEMPORARY);
ret = -ENOMEM;
- if (!pages)
+ if (!pm.buffer)
goto out_mm;
- down_read(&current->mm->mmap_sem);
- ret = get_user_pages(current, current->mm, uaddr, pagecount,
- 1, 0, pages, NULL);
- up_read(&current->mm->mmap_sem);
-
- if (ret < 0)
- goto out_free;
-
- if (ret != pagecount) {
- pagecount = ret;
- ret = -EFAULT;
- goto out_pages;
- }
-
- pm.out = (u64 __user *)buf;
- pm.end = (u64 __user *)(buf + count);
-
pagemap_walk.pmd_entry = pagemap_pte_range;
pagemap_walk.pte_hole = pagemap_pte_hole;
+#ifdef CONFIG_HUGETLB_PAGE
pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
+#endif
pagemap_walk.mm = mm;
pagemap_walk.private = &pm;
@@ -804,23 +756,36 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
* user buffer is tracked in "pm", and the walk
* will stop when we hit the end of the buffer.
*/
- ret = walk_page_range(start_vaddr, end_vaddr, &pagemap_walk);
- if (ret == PM_END_OF_BUFFER)
- ret = 0;
- /* don't need mmap_sem for these, but this looks cleaner */
- *ppos += (char __user *)pm.out - buf;
- if (!ret)
- ret = (char __user *)pm.out - buf;
-
-out_pages:
- for (; pagecount; pagecount--) {
- page = pages[pagecount-1];
- if (!PageReserved(page))
- SetPageDirty(page);
- page_cache_release(page);
+ ret = 0;
+ while (count && (start_vaddr < end_vaddr)) {
+ int len;
+ unsigned long end;
+
+ pm.pos = 0;
+ end = start_vaddr + PAGEMAP_WALK_SIZE;
+ /* overflow ? */
+ if (end < start_vaddr || end > end_vaddr)
+ end = end_vaddr;
+ down_read(&mm->mmap_sem);
+ ret = walk_page_range(start_vaddr, end, &pagemap_walk);
+ up_read(&mm->mmap_sem);
+ start_vaddr = end;
+
+ len = min(count, PM_ENTRY_BYTES * pm.pos);
+ if (copy_to_user(buf, pm.buffer, len)) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ copied += len;
+ buf += len;
+ count -= len;
}
+ *ppos += copied;
+ if (!ret || ret == PM_END_OF_BUFFER)
+ ret = copied;
+
out_free:
- kfree(pages);
+ kfree(pm.buffer);
out_mm:
mmput(mm);
out_task:
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 5d9fd64ef81a..cb6306e63843 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -5,6 +5,7 @@
#include <linux/fs_struct.h>
#include <linux/mount.h>
#include <linux/ptrace.h>
+#include <linux/slab.h>
#include <linux/seq_file.h>
#include "internal.h"
@@ -121,11 +122,20 @@ int task_statm(struct mm_struct *mm, int *shared, int *text,
return size;
}
+static void pad_len_spaces(struct seq_file *m, int len)
+{
+ len = 25 + sizeof(void*) * 6 - len;
+ if (len < 1)
+ len = 1;
+ seq_printf(m, "%*c", len, ' ');
+}
+
/*
* display a single VMA to a sequenced file
*/
static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
{
+ struct mm_struct *mm = vma->vm_mm;
unsigned long ino = 0;
struct file *file;
dev_t dev = 0;
@@ -154,11 +164,14 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
MAJOR(dev), MINOR(dev), ino, &len);
if (file) {
- len = 25 + sizeof(void *) * 6 - len;
- if (len < 1)
- len = 1;
- seq_printf(m, "%*c", len, ' ');
+ 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) {
+ pad_len_spaces(m, len);
+ seq_puts(m, "[stack]");
+ }
}
seq_putc(m, '\n');
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 0872afa58d39..91c817ff02c3 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -12,6 +12,7 @@
#include <linux/user.h>
#include <linux/elf.h>
#include <linux/elfcore.h>
+#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/init.h>
@@ -162,6 +163,7 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
static const struct file_operations proc_vmcore_operations = {
.read = read_vmcore,
+ .llseek = generic_file_llseek,
};
static struct vmcore* __init get_new_element(void)
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-06 14:41:03 +0000