From 2f232912feec57d73b22cb26dcdf687846917e9e Mon Sep 17 00:00:00 2001 From: Md Haris Iqbal Date: Wed, 22 Sep 2021 14:53:27 +0200 Subject: RDMA/rtrs: Use sysfs_emit instead of s*printf function for sysfs show sysfs_emit function was added to be aware of the PAGE_SIZE maximum of the temporary buffer used for outputting sysfs content, so there is no possible overruns. So replace the uses of any s*printf functions for the sysfs show functions with sysfs_emit. Link: https://lore.kernel.org/r/20210922125333.351454-2-haris.iqbal@ionos.com Signed-off-by: Md Haris Iqbal Signed-off-by: Jack Wang Signed-off-by: Jason Gunthorpe --- drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c | 24 +++++++++++------------- drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 2 +- 2 files changed, 12 insertions(+), 14 deletions(-) (limited to 'drivers/infiniband/ulp/rtrs') diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c index 5e780bdd763d..9c27f21ec040 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c @@ -45,24 +45,23 @@ int rtrs_clt_stats_migration_cnt_to_str(struct rtrs_clt_stats *stats, size_t used; int cpu; - used = scnprintf(buf, len, " "); + used = sysfs_emit(buf, " "); for_each_possible_cpu(cpu) - used += scnprintf(buf + used, len - used, " CPU%u", cpu); + used += sysfs_emit_at(buf, used, " CPU%u", cpu); - used += scnprintf(buf + used, len - used, "\nfrom:"); + used += sysfs_emit_at(buf, used, "\nfrom:"); for_each_possible_cpu(cpu) { s = per_cpu_ptr(stats->pcpu_stats, cpu); - used += scnprintf(buf + used, len - used, " %d", + used += sysfs_emit_at(buf, used, " %d", atomic_read(&s->cpu_migr.from)); } - used += scnprintf(buf + used, len - used, "\nto :"); + used += sysfs_emit_at(buf, used, "\nto :"); for_each_possible_cpu(cpu) { s = per_cpu_ptr(stats->pcpu_stats, cpu); - used += scnprintf(buf + used, len - used, " %d", - s->cpu_migr.to); + used += sysfs_emit_at(buf, used, " %d", s->cpu_migr.to); } - used += scnprintf(buf + used, len - used, "\n"); + used += sysfs_emit_at(buf, used, "\n"); return used; } @@ -70,9 +69,8 @@ int rtrs_clt_stats_migration_cnt_to_str(struct rtrs_clt_stats *stats, int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf, size_t len) { - return scnprintf(buf, len, "%d %d\n", - stats->reconnects.successful_cnt, - stats->reconnects.fail_cnt); + return sysfs_emit(buf, "%d %d\n", stats->reconnects.successful_cnt, + stats->reconnects.fail_cnt); } ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, @@ -94,7 +92,7 @@ ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, sum.failover_cnt += r->failover_cnt; } - return scnprintf(page, len, "%llu %llu %llu %llu %u %llu\n", + return sysfs_emit(page, "%llu %llu %llu %llu %u %llu\n", sum.dir[READ].cnt, sum.dir[READ].size_total, sum.dir[WRITE].cnt, sum.dir[WRITE].size_total, atomic_read(&stats->inflight), sum.failover_cnt); @@ -103,7 +101,7 @@ ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, ssize_t rtrs_clt_reset_all_help(struct rtrs_clt_stats *s, char *page, size_t len) { - return scnprintf(page, len, "echo 1 to reset all statistics\n"); + return sysfs_emit(page, "echo 1 to reset all statistics\n"); } int rtrs_clt_reset_rdma_stats(struct rtrs_clt_stats *stats, bool enable) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c index 20efd44297fb..9c43ce5ba1c1 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c @@ -102,7 +102,7 @@ static ssize_t rtrs_srv_src_addr_show(struct kobject *kobj, sess = container_of(kobj, struct rtrs_srv_sess, kobj); cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, page, PAGE_SIZE); - return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n"); + return cnt + sysfs_emit_at(page, cnt, "\n"); } static struct kobj_attribute rtrs_srv_src_addr_attr = -- cgit v1.2.3