drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c

File Facts

System

Linux kernel

Corpus path

drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c

Extension

.c

Size

1312 bytes

Lines

52

Domain

Driver Families

Bucket

drivers/infiniband

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• rtrs-srv.h

Detected Declarations

• function Copyright
• function for_each_possible_cpu
• function rtrs_srv_stats_rdma_to_str
• function for_each_possible_cpu

Annotated Snippet

for_each_possible_cpu(cpu) {
			r = per_cpu_ptr(stats->rdma_stats, cpu);
			memset(r, 0, sizeof(*r));
		}

		return 0;
	}

	return -EINVAL;
}

ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats, char *page)
{
	int cpu;
	struct rtrs_srv_stats_rdma_stats sum;
	struct rtrs_srv_stats_rdma_stats *r;

	memset(&sum, 0, sizeof(sum));

	for_each_possible_cpu(cpu) {
		r = per_cpu_ptr(stats->rdma_stats, cpu);

		sum.dir[READ].cnt	  += r->dir[READ].cnt;
		sum.dir[READ].size_total  += r->dir[READ].size_total;
		sum.dir[WRITE].cnt	  += r->dir[WRITE].cnt;
		sum.dir[WRITE].size_total += r->dir[WRITE].size_total;
	}

	return sysfs_emit(page, "%llu %llu %llu %llu\n",
			  sum.dir[READ].cnt, sum.dir[READ].size_total,
			  sum.dir[WRITE].cnt, sum.dir[WRITE].size_total);
}

Annotation

• Immediate include surface: `rtrs-srv.h`.
• Detected declarations: `function Copyright`, `function for_each_possible_cpu`, `function rtrs_srv_stats_rdma_to_str`, `function for_each_possible_cpu`.
• Atlas domain: Driver Families / drivers/infiniband.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.