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Tofu: proper cleanup of device files when mcexec gets killed

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Change-Id: I6cb0290f72d96682700f945b29585e132e525ac1
This commit is contained in:
Balazs Gerofi
2020-09-08 13:30:32 +09:00
committed by Masamichi Takagi
parent 1918df7765
commit e5f4a4e87d
10 changed files with 489 additions and 40 deletions
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14
executer/kernel/mcctrl/driver.c
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@@ -50,6 +50,7 @@ extern void procfs_exit(int);
extern void uti_attr_finalize(void);
extern void binfmt_mcexec_init(void);
extern void binfmt_mcexec_exit(void);
extern void mcctrl_file_to_pidfd_hash_init(void);
extern int mcctrl_os_read_cpu_register(ihk_os_t os, int cpu,
struct ihk_os_cpu_register *desc);
@@ -57,6 +58,11 @@ extern int mcctrl_os_write_cpu_register(ihk_os_t os, int cpu,
struct ihk_os_cpu_register *desc);
extern int mcctrl_get_request_os_cpu(ihk_os_t os, int *cpu);
#ifdef ENABLE_TOFU
extern void mcctrl_tofu_hijack_release_handlers(void);
extern void mcctrl_tofu_restore_release_handlers(void);
#endif
static long mcctrl_ioctl(ihk_os_t os, unsigned int request, void *priv,
unsigned long arg, struct file *file)
{
@@ -319,10 +325,15 @@ static int __init mcctrl_init(void)
}
binfmt_mcexec_init();
mcctrl_file_to_pidfd_hash_init();
if ((ret = symbols_init()))
goto error;
#ifdef ENABLE_TOFU
mcctrl_tofu_hijack_release_handlers();
#endif
if ((ret = ihk_host_register_os_notifier(&mcctrl_os_notifier)) != 0) {
printk("mcctrl: error: registering OS notifier\n");
goto error;
@@ -345,6 +356,9 @@ static void __exit mcctrl_exit(void)
binfmt_mcexec_exit();
uti_attr_finalize();
#ifdef ENABLE_TOFU
mcctrl_tofu_restore_release_handlers();
#endif
printk("mcctrl: unregistered.\n");
}