diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/lkdtm_core.c | 66 |
1 files changed, 36 insertions, 30 deletions
diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm_core.c index de29a339242a..717aad6d374b 100644 --- a/drivers/misc/lkdtm_core.c +++ b/drivers/misc/lkdtm_core.c @@ -53,12 +53,14 @@ #define DEFAULT_COUNT 10 -static void lkdtm_handler(void); static int lkdtm_debugfs_open(struct inode *inode, struct file *file); static ssize_t lkdtm_debugfs_read(struct file *f, char __user *user_buf, size_t count, loff_t *off); static ssize_t direct_entry(struct file *f, const char __user *user_buf, size_t count, loff_t *off); + +#ifdef CONFIG_KPROBES +static void lkdtm_handler(void); static ssize_t lkdtm_debugfs_entry(struct file *f, const char __user *user_buf, size_t count, loff_t *off); @@ -118,7 +120,7 @@ static int jp_scsi_dispatch_cmd(struct scsi_cmnd *cmd) return 0; } -#ifdef CONFIG_IDE +# ifdef CONFIG_IDE static int jp_generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, unsigned int cmd, unsigned long arg) @@ -127,9 +129,9 @@ static int jp_generic_ide_ioctl(ide_drive_t *drive, struct file *file, jprobe_return(); return 0; } +# endif #endif - /* Crash points */ struct crashpoint { const char *name; @@ -238,10 +240,6 @@ static struct jprobe *lkdtm_jprobe; struct crashpoint *lkdtm_crashpoint; struct crashtype *lkdtm_crashtype; -/* Global crash counter and spinlock. */ -static int crash_count = DEFAULT_COUNT; -static DEFINE_SPINLOCK(crash_count_lock); - /* Module parameters */ static int recur_count = -1; module_param(recur_count, int, 0644); @@ -285,29 +283,6 @@ static noinline void lkdtm_do_action(struct crashtype *crashtype) crashtype->func(); } -/* Called by jprobe entry points. */ -static void lkdtm_handler(void) -{ - unsigned long flags; - bool do_it = false; - - BUG_ON(!lkdtm_crashpoint || !lkdtm_crashtype); - - spin_lock_irqsave(&crash_count_lock, flags); - crash_count--; - pr_info("Crash point %s of type %s hit, trigger in %d rounds\n", - lkdtm_crashpoint->name, lkdtm_crashtype->name, crash_count); - - if (crash_count == 0) { - do_it = true; - crash_count = cpoint_count; - } - spin_unlock_irqrestore(&crash_count_lock, flags); - - if (do_it) - lkdtm_do_action(lkdtm_crashtype); -} - static int lkdtm_register_cpoint(struct crashpoint *crashpoint, struct crashtype *crashtype) { @@ -337,6 +312,34 @@ static int lkdtm_register_cpoint(struct crashpoint *crashpoint, return ret; } +#ifdef CONFIG_KPROBES +/* Global crash counter and spinlock. */ +static int crash_count = DEFAULT_COUNT; +static DEFINE_SPINLOCK(crash_count_lock); + +/* Called by jprobe entry points. */ +static void lkdtm_handler(void) +{ + unsigned long flags; + bool do_it = false; + + BUG_ON(!lkdtm_crashpoint || !lkdtm_crashtype); + + spin_lock_irqsave(&crash_count_lock, flags); + crash_count--; + pr_info("Crash point %s of type %s hit, trigger in %d rounds\n", + lkdtm_crashpoint->name, lkdtm_crashtype->name, crash_count); + + if (crash_count == 0) { + do_it = true; + crash_count = cpoint_count; + } + spin_unlock_irqrestore(&crash_count_lock, flags); + + if (do_it) + lkdtm_do_action(lkdtm_crashtype); +} + static ssize_t lkdtm_debugfs_entry(struct file *f, const char __user *user_buf, size_t count, loff_t *off) @@ -374,6 +377,7 @@ static ssize_t lkdtm_debugfs_entry(struct file *f, return count; } +#endif /* Generic read callback that just prints out the available crash types */ static ssize_t lkdtm_debugfs_read(struct file *f, char __user *user_buf, @@ -476,8 +480,10 @@ static int __init lkdtm_module_init(void) } } +#ifdef CONFIG_KPROBES /* Set crash count. */ crash_count = cpoint_count; +#endif /* Handle test-specific initialization. */ lkdtm_bugs_init(&recur_count); |