diff options
Diffstat (limited to 'drivers/block/drbd/drbd_polymorph_printk.h')
| -rw-r--r-- | drivers/block/drbd/drbd_polymorph_printk.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_polymorph_printk.h b/drivers/block/drbd/drbd_polymorph_printk.h new file mode 100644 index 000000000000..8e0082d139ba --- /dev/null +++ b/drivers/block/drbd/drbd_polymorph_printk.h @@ -0,0 +1,141 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef DRBD_POLYMORPH_PRINTK_H +#define DRBD_POLYMORPH_PRINTK_H + +#if !defined(CONFIG_DYNAMIC_DEBUG) +#undef DEFINE_DYNAMIC_DEBUG_METADATA +#undef __dynamic_pr_debug +#undef DYNAMIC_DEBUG_BRANCH +#define DEFINE_DYNAMIC_DEBUG_METADATA(D, F) const char *D = F; ((void)D) +#define __dynamic_pr_debug(D, F, args...) do { (void)(D); if (0) printk(F, ## args); } while (0) +#define DYNAMIC_DEBUG_BRANCH(D) false +#endif + + +#define __drbd_printk_drbd_device_prep(device) \ + const struct drbd_device *__d = (device); \ + const struct drbd_resource *__r = __d->resource +#define __drbd_printk_drbd_device_fmt(fmt) "drbd %s/%u drbd%u: " fmt +#define __drbd_printk_drbd_device_args() __r->name, __d->vnr, __d->minor +#define __drbd_printk_drbd_device_unprep() + +#define __drbd_printk_drbd_peer_device_prep(peer_device) \ + const struct drbd_device *__d; \ + const struct drbd_resource *__r; \ + __d = (peer_device)->device; \ + __r = __d->resource +#define __drbd_printk_drbd_peer_device_fmt(fmt) \ + "drbd %s/%u drbd%u: " fmt +#define __drbd_printk_drbd_peer_device_args() \ + __r->name, __d->vnr, __d->minor +#define __drbd_printk_drbd_peer_device_unprep() + +#define __drbd_printk_drbd_resource_prep(resource) \ + const struct drbd_resource *__r = resource +#define __drbd_printk_drbd_resource_fmt(fmt) "drbd %s: " fmt +#define __drbd_printk_drbd_resource_args() __r->name +#define __drbd_printk_drbd_resource_unprep(resource) + +#define __drbd_printk_drbd_connection_prep(connection) \ + const struct drbd_connection *__c = (connection); \ + const struct drbd_resource *__r = __c->resource +#define __drbd_printk_drbd_connection_fmt(fmt) \ + "drbd %s: " fmt +#define __drbd_printk_drbd_connection_args() \ + __r->name +#define __drbd_printk_drbd_connection_unprep() + +void drbd_printk_with_wrong_object_type(void); +void drbd_dyn_dbg_with_wrong_object_type(void); + +#define __drbd_printk_choose_cond(obj, struct_name) \ + (__builtin_types_compatible_p(typeof(obj), struct struct_name *) || \ + __builtin_types_compatible_p(typeof(obj), const struct struct_name *)) +#define __drbd_printk_if_same_type(obj, struct_name, level, fmt, args...) \ + __drbd_printk_choose_cond(obj, struct_name), \ +({ \ + __drbd_printk_ ## struct_name ## _prep((const struct struct_name *)(obj)); \ + printk(level __drbd_printk_ ## struct_name ## _fmt(fmt), \ + __drbd_printk_ ## struct_name ## _args(), ## args); \ + __drbd_printk_ ## struct_name ## _unprep(); \ +}) + +#define drbd_printk(level, obj, fmt, args...) \ + __builtin_choose_expr( \ + __drbd_printk_if_same_type(obj, drbd_device, level, fmt, ## args), \ + __builtin_choose_expr( \ + __drbd_printk_if_same_type(obj, drbd_resource, level, fmt, ## args), \ + __builtin_choose_expr( \ + __drbd_printk_if_same_type(obj, drbd_connection, level, fmt, ## args), \ + __builtin_choose_expr( \ + __drbd_printk_if_same_type(obj, drbd_peer_device, level, fmt, ## args), \ + drbd_printk_with_wrong_object_type())))) + +#define __drbd_dyn_dbg_if_same_type(obj, struct_name, fmt, args...) \ + __drbd_printk_choose_cond(obj, struct_name), \ +({ \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (DYNAMIC_DEBUG_BRANCH(descriptor)) { \ + __drbd_printk_ ## struct_name ## _prep((const struct struct_name *)(obj)); \ + __dynamic_pr_debug(&descriptor, __drbd_printk_ ## struct_name ## _fmt(fmt), \ + __drbd_printk_ ## struct_name ## _args(), ## args); \ + __drbd_printk_ ## struct_name ## _unprep(); \ + } \ +}) + +#define dynamic_drbd_dbg(obj, fmt, args...) \ + __builtin_choose_expr( \ + __drbd_dyn_dbg_if_same_type(obj, drbd_device, fmt, ## args), \ + __builtin_choose_expr( \ + __drbd_dyn_dbg_if_same_type(obj, drbd_resource, fmt, ## args), \ + __builtin_choose_expr( \ + __drbd_dyn_dbg_if_same_type(obj, drbd_connection, fmt, ## args), \ + __builtin_choose_expr( \ + __drbd_dyn_dbg_if_same_type(obj, drbd_peer_device, fmt, ## args), \ + drbd_dyn_dbg_with_wrong_object_type())))) + +#define drbd_emerg(device, fmt, args...) \ + drbd_printk(KERN_EMERG, device, fmt, ## args) +#define drbd_alert(device, fmt, args...) \ + drbd_printk(KERN_ALERT, device, fmt, ## args) +#define drbd_crit(device, fmt, args...) \ + drbd_printk(KERN_CRIT, device, fmt, ## args) +#define drbd_err(device, fmt, args...) \ + drbd_printk(KERN_ERR, device, fmt, ## args) +#define drbd_warn(device, fmt, args...) \ + drbd_printk(KERN_WARNING, device, fmt, ## args) +#define drbd_notice(device, fmt, args...) \ + drbd_printk(KERN_NOTICE, device, fmt, ## args) +#define drbd_info(device, fmt, args...) \ + drbd_printk(KERN_INFO, device, fmt, ## args) + + +#define drbd_ratelimit() \ +({ \ + static DEFINE_RATELIMIT_STATE(_rs, \ + DEFAULT_RATELIMIT_INTERVAL, \ + DEFAULT_RATELIMIT_BURST); \ + __ratelimit(&_rs); \ +}) + +#define D_ASSERT(x, exp) \ + do { \ + if (!(exp)) \ + drbd_err(x, "ASSERTION %s FAILED in %s\n", \ + #exp, __func__); \ + } while (0) + +/** + * expect - Make an assertion + * + * Unlike the assert macro, this macro returns a boolean result. + */ +#define expect(x, exp) ({ \ + bool _bool = (exp); \ + if (!_bool && drbd_ratelimit()) \ + drbd_err(x, "ASSERTION %s FAILED in %s\n", \ + #exp, __func__); \ + _bool; \ + }) + +#endif |