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Make struct grouptask gt_name member a char array

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Previously, it was just a pointer which was copied, but
some callers pass in a stack variable which will go out of scope.
Add GROUPTASK_NAMELEN macro (32) and snprintf() the name into it,
using "grouptask" if name is NULL. We can now safely include
gtask->gt_name in console messages.

Reviewed by:	sbruno
Approved by:	sbruno (mentor)
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D12449
This commit is contained in:
Stephen Hurd 2017-09-23 01:39:16 +00:00
parent f4d2154e0c
commit d57a78580e
2 changed files with 8 additions and 7 deletions
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12
sys/kern/subr_gtaskqueue.c
View File

@ -666,7 +666,7 @@ taskqgroup_attach(struct taskqgroup *qgroup, struct grouptask *gtask,
int qid, error;
gtask->gt_uniq = uniq;
gtask->gt_name = name;
snprintf(gtask->gt_name, GROUPTASK_NAMELEN, "%s", name ? name : "grouptask");
gtask->gt_irq = irq;
gtask->gt_cpu = -1;
mtx_lock(&qgroup->tqg_lock);
@ -703,7 +703,7 @@ taskqgroup_attach_deferred(struct taskqgroup *qgroup, struct grouptask *gtask)
error = intr_setaffinity(gtask->gt_irq, CPU_WHICH_IRQ, &mask);
mtx_lock(&qgroup->tqg_lock);
if (error)
printf("%s: setaffinity failed: %d\n", __func__, error);
printf("%s: %s setaffinity failed: %d\n", __func__, gtask->gt_name, error);
}
qgroup->tqg_queue[qid].tgc_cnt++;
@ -724,7 +724,7 @@ taskqgroup_attach_cpu(struct taskqgroup *qgroup, struct grouptask *gtask,
qid = -1;
gtask->gt_uniq = uniq;
gtask->gt_name = name;
snprintf(gtask->gt_name, GROUPTASK_NAMELEN, "%s", name ? name : "grouptask");
gtask->gt_irq = irq;
gtask->gt_cpu = cpu;
mtx_lock(&qgroup->tqg_lock);
@ -736,7 +736,7 @@ taskqgroup_attach_cpu(struct taskqgroup *qgroup, struct grouptask *gtask,
}
if (qid == -1) {
mtx_unlock(&qgroup->tqg_lock);
printf("%s: qid not found for %s cpu=%d\n", __func__, name, cpu);
printf("%s: qid not found for %s cpu=%d\n", __func__, gtask->gt_name, cpu);
return (EINVAL);
}
} else
@ -775,7 +775,7 @@ taskqgroup_attach_cpu_deferred(struct taskqgroup *qgroup, struct grouptask *gtas
}
if (qid == -1) {
mtx_unlock(&qgroup->tqg_lock);
printf("%s: qid not found for cpu=%d\n", __func__, cpu);
printf("%s: qid not found for %s cpu=%d\n", __func__, gtask->gt_name, cpu);
return (EINVAL);
}
qgroup->tqg_queue[qid].tgc_cnt++;
@ -805,7 +805,7 @@ taskqgroup_detach(struct taskqgroup *qgroup, struct grouptask *gtask)
if (qgroup->tqg_queue[i].tgc_taskq == gtask->gt_taskqueue)
break;
if (i == qgroup->tqg_cnt)
panic("taskqgroup_detach: task not in group\n");
panic("taskqgroup_detach: task %s not in group\n", gtask->gt_name);
qgroup->tqg_queue[i].tgc_cnt--;
LIST_REMOVE(gtask, gt_list);
mtx_unlock(&qgroup->tqg_lock);

3
sys/sys/_task.h
View File

@ -65,7 +65,8 @@ struct grouptask {
void *gt_taskqueue;
LIST_ENTRY(grouptask) gt_list;
void *gt_uniq;
char *gt_name;
#define GROUPTASK_NAMELEN 32
char gt_name[GROUPTASK_NAMELEN];
int16_t gt_irq;
int16_t gt_cpu;
};