diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/lkdtm_core.c | 75 |
1 files changed, 38 insertions, 37 deletions
diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm_core.c index fa7335ee08de..31b22f3b5fae 100644 --- a/drivers/misc/lkdtm_core.c +++ b/drivers/misc/lkdtm_core.c @@ -159,7 +159,7 @@ static char* cp_type[] = { "USERCOPY_KERNEL", }; -static struct jprobe lkdtm; +static struct jprobe lkdtm_jprobe; static int lkdtm_parse_commandline(void); static void lkdtm_handler(void); @@ -172,8 +172,8 @@ static int recur_count = -1; static int crash_count = DEFAULT_COUNT; static DEFINE_SPINLOCK(crash_count_lock); -static enum cname cpoint = CN_INVALID; -static enum ctype cptype = CT_NONE; +static enum cname lkdtm_crashpoint = CN_INVALID; +static enum ctype lkdtm_crashtype = CT_NONE; module_param(recur_count, int, 0644); MODULE_PARM_DESC(recur_count, " Recursion level for the stack overflow test"); @@ -300,8 +300,8 @@ static int lkdtm_parse_commandline(void) if (!cpoint_type || !cpoint_name) return -EINVAL; - cptype = parse_cp_type(cpoint_type, strlen(cpoint_type)); - if (cptype == CT_NONE) + lkdtm_crashtype = parse_cp_type(cpoint_type, strlen(cpoint_type)); + if (lkdtm_crashtype == CT_NONE) return -EINVAL; /* Refuse INVALID as a selectable crashpoint name. */ @@ -310,7 +310,7 @@ static int lkdtm_parse_commandline(void) for (i = 0; i < ARRAY_SIZE(cp_name); i++) { if (!strcmp(cpoint_name, cp_name[i])) { - cpoint = i; + lkdtm_crashpoint = i; return 0; } } @@ -448,7 +448,8 @@ static void lkdtm_handler(void) spin_lock_irqsave(&crash_count_lock, flags); crash_count--; pr_info("Crash point %s of type %s hit, trigger in %d rounds\n", - cp_name_to_str(cpoint), cp_type_to_str(cptype), crash_count); + cp_name_to_str(lkdtm_crashpoint), + cp_type_to_str(lkdtm_crashtype), crash_count); if (crash_count == 0) { do_it = true; @@ -457,53 +458,53 @@ static void lkdtm_handler(void) spin_unlock_irqrestore(&crash_count_lock, flags); if (do_it) - lkdtm_do_action(cptype); + lkdtm_do_action(lkdtm_crashtype); } static int lkdtm_register_cpoint(enum cname which) { int ret; - cpoint = CN_INVALID; - if (lkdtm.entry != NULL) - unregister_jprobe(&lkdtm); + lkdtm_crashpoint = CN_INVALID; + if (lkdtm_jprobe.entry != NULL) + unregister_jprobe(&lkdtm_jprobe); switch (which) { case CN_DIRECT: - lkdtm_do_action(cptype); + lkdtm_do_action(lkdtm_crashtype); return 0; case CN_INT_HARDWARE_ENTRY: - lkdtm.kp.symbol_name = "do_IRQ"; - lkdtm.entry = (kprobe_opcode_t*) jp_do_irq; + lkdtm_jprobe.kp.symbol_name = "do_IRQ"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_do_irq; break; case CN_INT_HW_IRQ_EN: - lkdtm.kp.symbol_name = "handle_IRQ_event"; - lkdtm.entry = (kprobe_opcode_t*) jp_handle_irq_event; + lkdtm_jprobe.kp.symbol_name = "handle_IRQ_event"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_handle_irq_event; break; case CN_INT_TASKLET_ENTRY: - lkdtm.kp.symbol_name = "tasklet_action"; - lkdtm.entry = (kprobe_opcode_t*) jp_tasklet_action; + lkdtm_jprobe.kp.symbol_name = "tasklet_action"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_tasklet_action; break; case CN_FS_DEVRW: - lkdtm.kp.symbol_name = "ll_rw_block"; - lkdtm.entry = (kprobe_opcode_t*) jp_ll_rw_block; + lkdtm_jprobe.kp.symbol_name = "ll_rw_block"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_ll_rw_block; break; case CN_MEM_SWAPOUT: - lkdtm.kp.symbol_name = "shrink_inactive_list"; - lkdtm.entry = (kprobe_opcode_t*) jp_shrink_inactive_list; + lkdtm_jprobe.kp.symbol_name = "shrink_inactive_list"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_shrink_inactive_list; break; case CN_TIMERADD: - lkdtm.kp.symbol_name = "hrtimer_start"; - lkdtm.entry = (kprobe_opcode_t*) jp_hrtimer_start; + lkdtm_jprobe.kp.symbol_name = "hrtimer_start"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_hrtimer_start; break; case CN_SCSI_DISPATCH_CMD: - lkdtm.kp.symbol_name = "scsi_dispatch_cmd"; - lkdtm.entry = (kprobe_opcode_t*) jp_scsi_dispatch_cmd; + lkdtm_jprobe.kp.symbol_name = "scsi_dispatch_cmd"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_scsi_dispatch_cmd; break; case CN_IDE_CORE_CP: #ifdef CONFIG_IDE - lkdtm.kp.symbol_name = "generic_ide_ioctl"; - lkdtm.entry = (kprobe_opcode_t*) jp_generic_ide_ioctl; + lkdtm_jprobe.kp.symbol_name = "generic_ide_ioctl"; + lkdtm_jprobe.entry = (kprobe_opcode_t*) jp_generic_ide_ioctl; #else pr_info("Crash point not available\n"); return -EINVAL; @@ -514,10 +515,10 @@ static int lkdtm_register_cpoint(enum cname which) return -EINVAL; } - cpoint = which; - if ((ret = register_jprobe(&lkdtm)) < 0) { + lkdtm_crashpoint = which; + if ((ret = register_jprobe(&lkdtm_jprobe)) < 0) { pr_info("Couldn't register jprobe\n"); - cpoint = CN_INVALID; + lkdtm_crashpoint = CN_INVALID; } return ret; @@ -543,10 +544,10 @@ static ssize_t do_register_entry(enum cname which, struct file *f, buf[count] = '\0'; strim(buf); - cptype = parse_cp_type(buf, count); + lkdtm_crashtype = parse_cp_type(buf, count); free_page((unsigned long) buf); - if (cptype == CT_NONE) + if (lkdtm_crashtype == CT_NONE) return -EINVAL; err = lkdtm_register_cpoint(which); @@ -755,10 +756,10 @@ static int __init lkdtm_module_init(void) goto out_err; } - if (cpoint != CN_INVALID && cptype != CT_NONE) { - ret = lkdtm_register_cpoint(cpoint); + if (lkdtm_crashpoint != CN_INVALID && lkdtm_crashtype != CT_NONE) { + ret = lkdtm_register_cpoint(lkdtm_crashpoint); if (ret < 0) { - pr_info("Invalid crash point %d\n", cpoint); + pr_info("Invalid crash point %d\n", lkdtm_crashpoint); goto out_err; } pr_info("Crash point %s of type %s registered\n", @@ -781,7 +782,7 @@ static void __exit lkdtm_module_exit(void) /* Handle test-specific clean-up. */ lkdtm_usercopy_exit(); - unregister_jprobe(&lkdtm); + unregister_jprobe(&lkdtm_jprobe); pr_info("Crash point unregistered\n"); } |