X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fproc%2Fbase.c;h=78fdfea1a7f87a9afe95a24e0566279c1fbd69ab;hb=5cae826e9e54a31f06b4c11b73f4af29e2ea4932;hp=ae3627337a924acd9d2a0281fd11614900036353;hpb=c2dc1ad582196208a2f990eb0230eb922046c684;p=linux-2.6

diff --git a/fs/proc/base.c b/fs/proc/base.c
index ae3627337a..78fdfea1a7 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -72,6 +72,7 @@
 #include <linux/poll.h>
 #include <linux/nsproxy.h>
 #include <linux/oom.h>
+#include <linux/elf.h>
 #include "internal.h"
 
 /* NOTE:
@@ -283,7 +284,7 @@ static int proc_pid_auxv(struct task_struct *task, char *buffer)
 static int proc_pid_wchan(struct task_struct *task, char *buffer)
 {
 	unsigned long wchan;
-	char symname[KSYM_NAME_LEN+1];
+	char symname[KSYM_NAME_LEN];
 
 	wchan = get_wchan(task);
 
@@ -303,7 +304,7 @@ static int proc_pid_schedstat(struct task_struct *task, char *buffer)
 	return sprintf(buffer, "%llu %llu %lu\n",
 			task->sched_info.cpu_time,
 			task->sched_info.run_delay,
-			task->sched_info.pcnt);
+			task->sched_info.pcount);
 }
 #endif
 
@@ -491,7 +492,7 @@ static ssize_t proc_info_read(struct file * file, char __user * buf,
 		count = PROC_BLOCK_SIZE;
 
 	length = -ENOMEM;
-	if (!(page = __get_free_page(GFP_KERNEL)))
+	if (!(page = __get_free_page(GFP_TEMPORARY)))
 		goto out;
 
 	length = PROC_I(inode)->op.proc_read(task, (char*)page);
@@ -531,7 +532,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
 		goto out;
 
 	ret = -ENOMEM;
-	page = (char *)__get_free_page(GFP_USER);
+	page = (char *)__get_free_page(GFP_TEMPORARY);
 	if (!page)
 		goto out;
 
@@ -601,7 +602,7 @@ static ssize_t mem_write(struct file * file, const char __user *buf,
 		goto out;
 
 	copied = -ENOMEM;
-	page = (char *)__get_free_page(GFP_USER);
+	page = (char *)__get_free_page(GFP_TEMPORARY);
 	if (!page)
 		goto out;
 
@@ -787,7 +788,7 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
 		/* No partial writes. */
 		return -EINVAL;
 	}
-	page = (char*)__get_free_page(GFP_USER);
+	page = (char*)__get_free_page(GFP_TEMPORARY);
 	if (!page)
 		return -ENOMEM;
 	length = -EFAULT;
@@ -926,7 +927,7 @@ static const struct file_operations proc_pid_sched_operations = {
 	.read		= seq_read,
 	.write		= sched_write,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 #endif
@@ -953,7 +954,8 @@ static int do_proc_readlink(struct dentry *dentry, struct vfsmount *mnt,
 			    char __user *buffer, int buflen)
 {
 	struct inode * inode;
-	char *tmp = (char*)__get_free_page(GFP_KERNEL), *path;
+	char *tmp = (char*)__get_free_page(GFP_TEMPORARY);
+	char *path;
 	int len;
 
 	if (!tmp)
@@ -1014,7 +1016,7 @@ static int task_dumpable(struct task_struct *task)
 	task_lock(task);
 	mm = task->mm;
 	if (mm)
-		dumpable = mm->dumpable;
+		dumpable = get_dumpable(mm);
 	task_unlock(task);
 	if(dumpable == 1)
 		return 1;
@@ -1725,7 +1727,7 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
 		goto out;
 
 	length = -ENOMEM;
-	page = (char*)__get_free_page(GFP_USER);
+	page = (char*)__get_free_page(GFP_TEMPORARY);
 	if (!page)
 		goto out;
 
@@ -1785,6 +1787,91 @@ static const struct inode_operations proc_attr_dir_inode_operations = {
 
 #endif
 
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
+					 size_t count, loff_t *ppos)
+{
+	struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+	struct mm_struct *mm;
+	char buffer[PROC_NUMBUF];
+	size_t len;
+	int ret;
+
+	if (!task)
+		return -ESRCH;
+
+	ret = 0;
+	mm = get_task_mm(task);
+	if (mm) {
+		len = snprintf(buffer, sizeof(buffer), "%08lx\n",
+			       ((mm->flags & MMF_DUMP_FILTER_MASK) >>
+				MMF_DUMP_FILTER_SHIFT));
+		mmput(mm);
+		ret = simple_read_from_buffer(buf, count, ppos, buffer, len);
+	}
+
+	put_task_struct(task);
+
+	return ret;
+}
+
+static ssize_t proc_coredump_filter_write(struct file *file,
+					  const char __user *buf,
+					  size_t count,
+					  loff_t *ppos)
+{
+	struct task_struct *task;
+	struct mm_struct *mm;
+	char buffer[PROC_NUMBUF], *end;
+	unsigned int val;
+	int ret;
+	int i;
+	unsigned long mask;
+
+	ret = -EFAULT;
+	memset(buffer, 0, sizeof(buffer));
+	if (count > sizeof(buffer) - 1)
+		count = sizeof(buffer) - 1;
+	if (copy_from_user(buffer, buf, count))
+		goto out_no_task;
+
+	ret = -EINVAL;
+	val = (unsigned int)simple_strtoul(buffer, &end, 0);
+	if (*end == '\n')
+		end++;
+	if (end - buffer == 0)
+		goto out_no_task;
+
+	ret = -ESRCH;
+	task = get_proc_task(file->f_dentry->d_inode);
+	if (!task)
+		goto out_no_task;
+
+	ret = end - buffer;
+	mm = get_task_mm(task);
+	if (!mm)
+		goto out_no_mm;
+
+	for (i = 0, mask = 1; i < MMF_DUMP_FILTER_BITS; i++, mask <<= 1) {
+		if (val & mask)
+			set_bit(i + MMF_DUMP_FILTER_SHIFT, &mm->flags);
+		else
+			clear_bit(i + MMF_DUMP_FILTER_SHIFT, &mm->flags);
+	}
+
+	mmput(mm);
+ out_no_mm:
+	put_task_struct(task);
+ out_no_task:
+	return ret;
+}
+
+static const struct file_operations proc_coredump_filter_operations = {
+	.read		= proc_coredump_filter_read,
+	.write		= proc_coredump_filter_write,
+};
+#endif
+
 /*
  * /proc/self:
  */
@@ -2005,6 +2092,9 @@ static const struct pid_entry tgid_base_stuff[] = {
 #ifdef CONFIG_FAULT_INJECTION
 	REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
 #endif
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+	REG("coredump_filter", S_IRUGO|S_IWUSR, coredump_filter),
+#endif
 #ifdef CONFIG_TASK_IO_ACCOUNTING
 	INF("io",	S_IRUGO, pid_io_accounting),
 #endif