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SET_ERROR should print strings

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When debugging with tracepoints, we see string pointers:

zfs  3017 [006]  8878.728915: zfs:zfs_set__error: ffffffffa0eec3fc:3013:ffffffffa0ebcd60(): error 0x2
        ffffffffa0e1ca43 spa_open_common (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffffa0e1cbe3 spa_open (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffffa0e6f6ef zfs_ioc_stable (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffffa0e6f2a9 zfsdev_ioctl (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffff811909dd do_vfs_ioctl ([kernel.kallsyms])
        ffffffff81190c41 sys_ioctl ([kernel.kallsyms])
        ffffffff8156e2e9 system_call_fastpath ([kernel.kallsyms])
            7ff7d8be69c7 __GI___ioctl (/lib64/libc-2.19.so)
            7ff7d90cac53 lzc_ioctl.constprop.3 (/lib64/libzfs_core.so.1.0.0)
        636f695f637a6c00 [unknown] ([unknown])

Printing the actual strings is more convenient:

zfs  3461 [001] 10599.847692: zfs:zfs_set__error: spa.c:3013:spa_open_common(): error 0x2
        ffffffffa116ba43 spa_open_common (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffffa116bbe3 spa_open (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffffa11be8df zfs_ioc_stable (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffffa11be499 zfsdev_ioctl (/lib/modules/3.12.21-gentoo-r1/extra/zfs/zfs.ko)
        ffffffff811909dd do_vfs_ioctl ([kernel.kallsyms])
        ffffffff81190c41 sys_ioctl ([kernel.kallsyms])
        ffffffff8156e2e9 system_call_fastpath ([kernel.kallsyms])
            7f11b843c9c7 __GI___ioctl (/lib64/libc-2.19.so)
            7f11b8920c53 lzc_ioctl.constprop.3 (/lib64/libzfs_core.so.1.0.0)
        636f695f637a6c00 [unknown] ([unknown])

A few other tracepoints have strings as well, so switch to printing
the actual string values at the same time.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4212
This commit is contained in:
Richard Yao 2016-01-12 21:01:14 -05:00 committed by Brian Behlendorf
parent b10695c8f1
commit 546f38433a
3 changed files with 22 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
include/sys/trace_dbgmsg.h
View File

@ -51,19 +51,20 @@ DECLARE_EVENT_CLASS(zfs_dprintf_class,
const char *msg),
TP_ARGS(file, function, line, msg),
TP_STRUCT__entry(
__field(const char *, file)
__field(const char *, function)
__string(file, file)
__string(function, function)
__field(int, line)
__string(msg, msg)
),
TP_fast_assign(
__entry->file = file;
__entry->function = function;
__assign_str(file, strchr(file, '/') ?
strrchr(file, '/') + 1 : file)
__assign_str(function, function);
__entry->line = line;
__assign_str(msg, msg);
),
TP_printk("%s:%d:%s(): %s", __entry->file, __entry->line,
__entry->function, __get_str(msg))
TP_printk("%s:%d:%s(): %s", __get_str(file), __entry->line,
__get_str(function), __get_str(msg))
);
#define DEFINE_DPRINTF_EVENT(name) \
@ -88,19 +89,20 @@ DECLARE_EVENT_CLASS(zfs_set_error_class,
uintptr_t error),
TP_ARGS(file, function, line, error),
TP_STRUCT__entry(
__field(const char *, file)
__field(const char *, function)
__string(file, file)
__string(function, function)
__field(int, line)
__field(uintptr_t, error)
),
TP_fast_assign(
__entry->file = strchr(file, '/') ? strrchr(file, '/') + 1 : file;
__entry->function = function;
__assign_str(file, strchr(file, '/') ?
strrchr(file, '/') + 1 : file)
__assign_str(function, function);
__entry->line = line;
__entry->error = error;
),
TP_printk("%s:%d:%s(): error 0x%lx", __entry->file, __entry->line,
__entry->function, __entry->error)
TP_printk("%s:%d:%s(): error 0x%lx", __get_str(file), __entry->line,
__get_str(function), __entry->error)
);
#ifdef TP_CONDITION

9
include/sys/trace_dbuf.h
View File

@ -42,7 +42,8 @@
*/
#define DBUF_TP_STRUCT_ENTRY \
__field(const char *, os_spa) \
__string(os_spa, \
spa_name(DB_DNODE(db)->dn_objset->os_spa)) \
__field(uint64_t, ds_object) \
__field(uint64_t, db_object) \
__field(uint64_t, db_level) \
@ -53,8 +54,8 @@
__field(int64_t, db_holds) \
#define DBUF_TP_FAST_ASSIGN \
__entry->os_spa = \
spa_name(DB_DNODE(db)->dn_objset->os_spa); \
__assign_str(os_spa, \
spa_name(DB_DNODE(db)->dn_objset->os_spa)); \
\
__entry->ds_object = db->db_objset->os_dsl_dataset ? \
db->db_objset->os_dsl_dataset->ds_object : 0; \
@ -72,7 +73,7 @@
"blkid %llu offset %llu size %llu state %llu holds %lld }"
#define DBUF_TP_PRINTK_ARGS \
__entry->os_spa, __entry->ds_object, \
__get_str(os_spa), __entry->ds_object, \
__entry->db_object, __entry->db_level, \
__entry->db_blkid, __entry->db_offset, \
__entry->db_size, __entry->db_state, __entry->db_holds

6
include/sys/trace_zrlock.h
View File

@ -48,7 +48,7 @@ DECLARE_EVENT_CLASS(zfs_zrlock_class,
__field(int32_t, refcount)
#ifdef ZFS_DEBUG
__field(pid_t, owner_pid)
__field(const char *, caller)
__string(caller, zrl->zr_caller)
#endif
__field(uint32_t, n)
),
@ -56,13 +56,13 @@ DECLARE_EVENT_CLASS(zfs_zrlock_class,
__entry->refcount = zrl->zr_refcount;
#ifdef ZFS_DEBUG
__entry->owner_pid = zrl->zr_owner ? zrl->zr_owner->pid : 0;
__entry->caller = zrl->zr_caller;
__assign_str(caller, zrl->zr_caller);
#endif
__entry->n = n;
),
#ifdef ZFS_DEBUG
TP_printk("zrl { refcount %d owner_pid %d caller %s } n %u",
__entry->refcount, __entry->owner_pid, __entry->caller,
__entry->refcount, __entry->owner_pid, __get_str(caller),
__entry->n)
#else
TP_printk("zrl { refcount %d } n %u",