/**
* gnet_stats_copy_rate_est - copy rate estimator statistics into statistics TLV
* @d: dumping handle
* @b: basic statistics
* @r: rate estimator statistics
*
* Appends the rate estimator statistics to the top level TLV created by
* gnet_stats_start_copy().
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_rate_est(struct gnet_dump *d,
const struct gnet_stats_basic_packed *b,
struct gnet_stats_rate_est64 *r)
{
struct gnet_stats_rate_est est;
int res;
if (b && !gen_estimator_active(b, r))
return 0;
est.bps = min_t(u64, UINT_MAX, r->bps);
/* we have some time before reaching 2^32 packets per second */
est.pps = r->pps;
if (d->compat_tc_stats) {
d->tc_stats.bps = est.bps;
d->tc_stats.pps = est.pps;
}
if (d->tail) {
res = gnet_stats_copy(d, TCA_STATS_RATE_EST, &est, sizeof(est));
if (res < 0 || est.bps == r->bps)
return res;
/* emit 64bit stats only if needed */
return gnet_stats_copy(d, TCA_STATS_RATE_EST64, r, sizeof(*r));
}
return 0;
}
/**
* gnet_stats_copy_rate_est - copy rate estimator statistics into statistics TLV
* @d: dumping handle
* @rate_est: rate estimator
*
* Appends the rate estimator statistics to the top level TLV created by
* gnet_stats_start_copy().
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_rate_est(struct gnet_dump *d,
struct net_rate_estimator __rcu **rate_est)
{
struct gnet_stats_rate_est64 sample;
struct gnet_stats_rate_est est;
int res;
if (!gen_estimator_read(rate_est, &sample))
return 0;
est.bps = min_t(u64, UINT_MAX, sample.bps);
/* we have some time before reaching 2^32 packets per second */
est.pps = sample.pps;
if (d->compat_tc_stats) {
d->tc_stats.bps = est.bps;
d->tc_stats.pps = est.pps;
}
if (d->tail) {
res = gnet_stats_copy(d, TCA_STATS_RATE_EST, &est, sizeof(est),
TCA_STATS_PAD);
if (res < 0 || est.bps == sample.bps)
return res;
/* emit 64bit stats only if needed */
return gnet_stats_copy(d, TCA_STATS_RATE_EST64, &sample,
sizeof(sample), TCA_STATS_PAD);
}
return 0;
}
/**
* gnet_stats_copy_app - copy application specific statistics into statistics TLV
* @d: dumping handle
* @st: application specific statistics data
* @len: length of data
*
* Appends the application sepecific statistics to the top level TLV created by
* gnet_stats_start_copy() and remembers the data for XSTATS if the dumping
* handle is in backward compatibility mode.
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
{
if (d->compat_xstats)
d->xstats = (struct rtattr *) d->skb->tail;
return gnet_stats_copy(d, TCA_STATS_APP, st, len);
}
/**
* gnet_stats_copy_basic - copy basic statistics into statistic TLV
* @running: seqcount_t pointer
* @d: dumping handle
* @cpu: copy statistic per cpu
* @b: basic statistics
*
* Appends the basic statistics to the top level TLV created by
* gnet_stats_start_copy().
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_basic(const seqcount_t *running,
struct gnet_dump *d,
struct gnet_stats_basic_cpu __percpu *cpu,
struct gnet_stats_basic_packed *b)
{
struct gnet_stats_basic_packed bstats = {0};
__gnet_stats_copy_basic(running, &bstats, cpu, b);
if (d->compat_tc_stats) {
d->tc_stats.bytes = bstats.bytes;
d->tc_stats.packets = bstats.packets;
}
if (d->tail) {
struct gnet_stats_basic sb;
memset(&sb, 0, sizeof(sb));
sb.bytes = bstats.bytes;
sb.packets = bstats.packets;
return gnet_stats_copy(d, TCA_STATS_BASIC, &sb, sizeof(sb),
TCA_STATS_PAD);
}
return 0;
}
/**
* gnet_stats_finish_copy - finish dumping procedure
* @d: dumping handle
*
* Corrects the length of the top level TLV to include all TLVs added
* by gnet_stats_copy_XXX() calls. Adds the backward compatibility TLVs
* if gnet_stats_start_copy_compat() was used and releases the statistics
* lock.
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_finish_copy(struct gnet_dump *d)
{
d->tail->rta_len = d->skb->tail - (u8 *) d->tail;
if (d->compat_tc_stats)
if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
sizeof(d->tc_stats)) < 0)
return -1;
if (d->compat_xstats && d->xstats) {
if (gnet_stats_copy(d, d->compat_xstats, RTA_DATA(d->xstats),
RTA_PAYLOAD(d->xstats)) < 0)
return -1;
}
spin_unlock_bh(d->lock);
return 0;
}
/**
* gnet_stats_copy_rate_est - copy rate estimator statistics into statistics TLV
* @d: dumping handle
* @r: rate estimator statistics
*
* Appends the rate estimator statistics to the top level TLV created by
* gnet_stats_start_copy().
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_rate_est(struct gnet_dump *d, struct gnet_stats_rate_est *r)
{
if (d->compat_tc_stats) {
d->tc_stats.bps = r->bps;
d->tc_stats.pps = r->pps;
}
return gnet_stats_copy(d, TCA_STATS_RATE_EST, r, sizeof(*r));
}
/**
* gnet_stats_copy_basic - copy basic statistics into statistic TLV
* @d: dumping handle
* @b: basic statistics
*
* Appends the basic statistics to the top level TLV created by
* gnet_stats_start_copy().
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_basic(struct gnet_dump *d, struct gnet_stats_basic *b)
{
if (d->compat_tc_stats) {
d->tc_stats.bytes = b->bytes;
d->tc_stats.packets = b->packets;
}
return gnet_stats_copy(d, TCA_STATS_BASIC, b, sizeof(*b));
}
int
gnet_stats_finish_copy(struct gnet_dump *d)
{
if (d->tail)
d->tail->nla_len = skb_tail_pointer(d->skb) - (u8 *)d->tail;
if (d->compat_tc_stats)
if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
sizeof(d->tc_stats)) < 0)
return -1;
if (d->compat_xstats && d->xstats) {
if (gnet_stats_copy(d, d->compat_xstats, d->xstats,
d->xstats_len) < 0)
return -1;
}
spin_unlock_bh(d->lock);
return 0;
}
/**
* gnet_stats_copy_queue - copy queue statistics into statistics TLV
* @d: dumping handle
* @q: queue statistics
*
* Appends the queue statistics to the top level TLV created by
* gnet_stats_start_copy().
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_queue(struct gnet_dump *d, struct gnet_stats_queue *q)
{
if (d->compat_tc_stats) {
d->tc_stats.drops = q->drops;
d->tc_stats.qlen = q->qlen;
d->tc_stats.backlog = q->backlog;
d->tc_stats.overlimits = q->overlimits;
}
return gnet_stats_copy(d, TCA_STATS_QUEUE, q, sizeof(*q));
}
/**
* gnet_stats_copy_app - copy application specific statistics into statistics TLV
* @d: dumping handle
* @st: application specific statistics data
* @len: length of data
*
* Appends the application sepecific statistics to the top level TLV created by
* gnet_stats_start_copy() and remembers the data for XSTATS if the dumping
* handle is in backward compatibility mode.
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
{
if (d->compat_xstats) {
d->xstats = st;
d->xstats_len = len;
}
if (d->tail)
return gnet_stats_copy(d, TCA_STATS_APP, st, len);
return 0;
}
/**
* gnet_stats_finish_copy - finish dumping procedure
* @d: dumping handle
*
* Corrects the length of the top level TLV to include all TLVs added
* by gnet_stats_copy_XXX() calls. Adds the backward compatibility TLVs
* if gnet_stats_start_copy_compat() was used and releases the statistics
* lock.
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_finish_copy(struct gnet_dump *d)
{
if (d->tail)
d->tail->nla_len = skb_tail_pointer(d->skb) - (u8 *)d->tail;
if (d->compat_tc_stats)
if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
sizeof(d->tc_stats), d->padattr) < 0)
return -1;
if (d->compat_xstats && d->xstats) {
if (gnet_stats_copy(d, d->compat_xstats, d->xstats,
d->xstats_len, d->padattr) < 0)
return -1;
}
if (d->lock)
spin_unlock_bh(d->lock);
kfree(d->xstats);
d->xstats = NULL;
d->xstats_len = 0;
return 0;
}
/**
* gnet_stats_start_copy_compat - start dumping procedure in compatibility mode
* @skb: socket buffer to put statistics TLVs into
* @type: TLV type for top level statistic TLV
* @tc_stats_type: TLV type for backward compatibility struct tc_stats TLV
* @xstats_type: TLV type for backward compatibility xstats TLV
* @lock: statistics lock
* @d: dumping handle
*
* Initializes the dumping handle, grabs the statistic lock and appends
* an empty TLV header to the socket buffer for use a container for all
* other statistic TLVS.
*
* The dumping handle is marked to be in backward compatibility mode telling
* all gnet_stats_copy_XXX() functions to fill a local copy of struct tc_stats.
*
* Returns 0 on success or -1 if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
int xstats_type, spinlock_t *lock, struct gnet_dump *d)
{
spin_lock_bh(lock);
d->lock = lock;
d->tail = (struct rtattr *) skb->tail;
d->skb = skb;
d->compat_tc_stats = tc_stats_type;
d->compat_xstats = xstats_type;
d->xstats = NULL;
if (d->compat_tc_stats)
memset(&d->tc_stats, 0, sizeof(d->tc_stats));
return gnet_stats_copy(d, type, NULL, 0);
}
int
gnet_stats_copy_rate_est(struct gnet_dump *d,
const struct gnet_stats_basic_packed *b,
struct gnet_stats_rate_est *r)
{
if (b && !gen_estimator_active(b, r))
return 0;
if (d->compat_tc_stats) {
d->tc_stats.bps = r->bps;
d->tc_stats.pps = r->pps;
}
if (d->tail)
return gnet_stats_copy(d, TCA_STATS_RATE_EST, r, sizeof(*r));
return 0;
}
int
gnet_stats_copy_basic(struct gnet_dump *d, struct gnet_stats_basic_packed *b)
{
if (d->compat_tc_stats) {
d->tc_stats.bytes = b->bytes;
d->tc_stats.packets = b->packets;
}
if (d->tail) {
struct gnet_stats_basic sb;
memset(&sb, 0, sizeof(sb));
sb.bytes = b->bytes;
sb.packets = b->packets;
return gnet_stats_copy(d, TCA_STATS_BASIC, &sb, sizeof(sb));
}
return 0;
}
/**
* gnet_stats_copy_app - copy application specific statistics into statistics TLV
* @d: dumping handle
* @st: application specific statistics data
* @len: length of data
*
* Appends the application specific statistics to the top level TLV created by
* gnet_stats_start_copy() and remembers the data for XSTATS if the dumping
* handle is in backward compatibility mode.
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
{
if (d->compat_xstats) {
d->xstats = kmemdup(st, len, GFP_ATOMIC);
if (!d->xstats)
goto err_out;
d->xstats_len = len;
}
if (d->tail)
return gnet_stats_copy(d, TCA_STATS_APP, st, len);
return 0;
err_out:
d->xstats_len = 0;
spin_unlock_bh(d->lock);
return -1;
}
/**
* gnet_stats_copy_queue - copy queue statistics into statistics TLV
* @d: dumping handle
* @cpu_q: per cpu queue statistics
* @q: queue statistics
* @qlen: queue length statistics
*
* Appends the queue statistics to the top level TLV created by
* gnet_stats_start_copy(). Using per cpu queue statistics if
* they are available.
*
* Returns 0 on success or -1 with the statistic lock released
* if the room in the socket buffer was not sufficient.
*/
int
gnet_stats_copy_queue(struct gnet_dump *d,
struct gnet_stats_queue __percpu *cpu_q,
struct gnet_stats_queue *q, __u32 qlen)
{
struct gnet_stats_queue qstats = {0};
__gnet_stats_copy_queue(&qstats, cpu_q, q, qlen);
if (d->compat_tc_stats) {
d->tc_stats.drops = qstats.drops;
d->tc_stats.qlen = qstats.qlen;
d->tc_stats.backlog = qstats.backlog;
d->tc_stats.overlimits = qstats.overlimits;
}
if (d->tail)
return gnet_stats_copy(d, TCA_STATS_QUEUE,
&qstats, sizeof(qstats));
return 0;
}