linux.git (original) (raw)

Some servers want to be able to control the frequency with which clients report layoutstats, for instance, in order to monitor QoS for a particular file or set of file. In order to support this, the flexfiles layout allows the server to pass this info as a hint in the layout payload. Signed-off-by: Trond Myklebust trond.myklebust@primarydata.com

@@ -505,9 +505,17 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,

}

p = xdr_inline_decode(&stream, 4);

- if (p)

- fls->flags = be32_to_cpup(p);

+ if (!p)

+ goto out_sort_mirrors;

+ fls->flags = be32_to_cpup(p);

+ p = xdr_inline_decode(&stream, 4);

+ if (!p)

+ goto out_sort_mirrors;

+ for (i=0; i < fls->mirror_array_cnt; i++)

+ fls->mirror_array[i]->report_interval = be32_to_cpup(p);

+out_sort_mirrors:

ff_layout_sort_mirrors(fls);

rc = ff_layout_check_layout(lgr);

if (rc)

@@ -603,7 +611,9 @@ nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,

mirror->start_time = now;

if (ktime_equal(mirror->last_report_time, notime))

mirror->last_report_time = now;

- if (layoutstats_timer != 0)

+ if (mirror->report_interval != 0)

+ report_interval = (s64)mirror->report_interval * 1000LL;

+ else if (layoutstats_timer != 0)

report_interval = (s64)layoutstats_timer * 1000LL;

if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >=

report_interval) {

@@ -85,6 +85,7 @@ struct nfs4_ff_layout_mirror {

struct nfs4_ff_layoutstat write_stat;

ktime_t start_time;

ktime_t last_report_time;

+ u32 report_interval;

};

struct nfs4_ff_layout_segment {