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execve(): support for ETXTBSY via a new ioctl() call to test in kernel space with open_exec()

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This commit is contained in:
Balazs Gerofi bgerofi@riken.jp
2014-09-10 14:07:25 +09:00
parent cee647aee4
commit ac40b96c24
4 changed files with 42 additions and 8 deletions
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26
executer/kernel/control.c
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@ -29,6 +29,8 @@
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/gfp.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/msr.h>
@ -690,6 +692,24 @@ long mcexec_ret_syscall(ihk_os_t os, struct syscall_ret_desc *__user arg)
return 0;
}
int mcexec_test_open_exec(ihk_os_t os, char * __user filename)
{
struct file *file;
int retval;
file = open_exec(filename);
retval = PTR_ERR(file);
if (IS_ERR(file)) {
goto out_return;
}
retval = 0;
fput(file);
out_return:
return -retval;
}
long mcexec_strncpy_from_user(ihk_os_t os, struct strncpy_from_user_desc * __user arg)
{
struct strncpy_from_user_desc desc;
@ -770,7 +790,11 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg)
return mcexec_get_cpu(os);
case MCEXEC_UP_STRNCPY_FROM_USER:
return mcexec_strncpy_from_user(os, (struct strncpy_from_user_desc *)arg);
return mcexec_strncpy_from_user(os,
(struct strncpy_from_user_desc *)arg);
case MCEXEC_UP_TEST_OPEN_EXEC:
return mcexec_test_open_exec(os, (char *)arg);
case MCEXEC_UP_PREPARE_DMA:
return mcexec_pin_region(os, (unsigned long *)arg);