tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 34fe76abbea5174e532681e420fb31139909efb4 commit: edb09eb17ed89eaa82a52dd306beac93e292b485 [105/106] net: sched: do not acquire qdisc spinlock in qdisc/class stats dump reproduce: make htmldocs
All warnings (new ones prefixed by >>):
include/linux/skbuff.h:930: warning: No description found for parameter 'sk'
include/net/sock.h:449: warning: No description found for parameter
'sk_padding'
include/net/sock.h:449: warning: No description found for parameter 'sk_rcu'
net/core/gen_stats.c:66: warning: No description found for parameter
'padattr'
net/core/gen_stats.c:102: warning: No description found for parameter
'padattr'
>> net/core/gen_stats.c:168: warning: No description found for parameter
>> 'running'
include/linux/netdevice.h:1867: warning: No description found for parameter
'qdisc_running_key'
vim +/running +168 net/core/gen_stats.c
^1da177e Linus Torvalds 2005-04-16 60 */
^1da177e Linus Torvalds 2005-04-16 61 int
^1da177e Linus Torvalds 2005-04-16 62
gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
9854518e Nicolas Dichtel 2016-04-26 63 int
xstats_type, spinlock_t *lock,
9854518e Nicolas Dichtel 2016-04-26 64 struct
gnet_dump *d, int padattr)
9a429c49 Eric Dumazet 2008-01-01 65 __acquires(lock)
^1da177e Linus Torvalds 2005-04-16 @66 {
^1da177e Linus Torvalds 2005-04-16 67 memset(d, 0, sizeof(*d));
^1da177e Linus Torvalds 2005-04-16 68
^1da177e Linus Torvalds 2005-04-16 69 if (type)
1e90474c Patrick McHardy 2008-01-22 70 d->tail = (struct
nlattr *)skb_tail_pointer(skb);
^1da177e Linus Torvalds 2005-04-16 71 d->skb = skb;
^1da177e Linus Torvalds 2005-04-16 72 d->compat_tc_stats =
tc_stats_type;
^1da177e Linus Torvalds 2005-04-16 73 d->compat_xstats = xstats_type;
9854518e Nicolas Dichtel 2016-04-26 74 d->padattr = padattr;
edb09eb1 Eric Dumazet 2016-06-06 75 if (lock) {
edb09eb1 Eric Dumazet 2016-06-06 76 d->lock = lock;
edb09eb1 Eric Dumazet 2016-06-06 77 spin_lock_bh(lock);
edb09eb1 Eric Dumazet 2016-06-06 78 }
^1da177e Linus Torvalds 2005-04-16 79 if (d->tail)
9854518e Nicolas Dichtel 2016-04-26 80 return
gnet_stats_copy(d, type, NULL, 0, padattr);
^1da177e Linus Torvalds 2005-04-16 81
^1da177e Linus Torvalds 2005-04-16 82 return 0;
^1da177e Linus Torvalds 2005-04-16 83 }
9e34a5b5 Eric Dumazet 2010-07-09 84
EXPORT_SYMBOL(gnet_stats_start_copy_compat);
^1da177e Linus Torvalds 2005-04-16 85
^1da177e Linus Torvalds 2005-04-16 86 /**
9854518e Nicolas Dichtel 2016-04-26 87 * gnet_stats_start_copy - start
dumping procedure in compatibility mode
^1da177e Linus Torvalds 2005-04-16 88 * @skb: socket buffer to put
statistics TLVs into
^1da177e Linus Torvalds 2005-04-16 89 * @type: TLV type for top level
statistic TLV
^1da177e Linus Torvalds 2005-04-16 90 * @lock: statistics lock
^1da177e Linus Torvalds 2005-04-16 91 * @d: dumping handle
^1da177e Linus Torvalds 2005-04-16 92 *
^1da177e Linus Torvalds 2005-04-16 93 * Initializes the dumping
handle, grabs the statistic lock and appends
^1da177e Linus Torvalds 2005-04-16 94 * an empty TLV header to the
socket buffer for use a container for all
^1da177e Linus Torvalds 2005-04-16 95 * other statistic TLVS.
^1da177e Linus Torvalds 2005-04-16 96 *
^1da177e Linus Torvalds 2005-04-16 97 * Returns 0 on success or -1 if
the room in the socket buffer was not sufficient.
^1da177e Linus Torvalds 2005-04-16 98 */
^1da177e Linus Torvalds 2005-04-16 99 int
^1da177e Linus Torvalds 2005-04-16 100 gnet_stats_start_copy(struct
sk_buff *skb, int type, spinlock_t *lock,
9854518e Nicolas Dichtel 2016-04-26 101 struct gnet_dump
*d, int padattr)
^1da177e Linus Torvalds 2005-04-16 102 {
9854518e Nicolas Dichtel 2016-04-26 103 return
gnet_stats_start_copy_compat(skb, type, 0, 0, lock, d, padattr);
^1da177e Linus Torvalds 2005-04-16 104 }
9e34a5b5 Eric Dumazet 2010-07-09 105
EXPORT_SYMBOL(gnet_stats_start_copy);
^1da177e Linus Torvalds 2005-04-16 106
22e0f8b9 John Fastabend 2014-09-28 107 static void
22e0f8b9 John Fastabend 2014-09-28 108
__gnet_stats_copy_basic_cpu(struct gnet_stats_basic_packed *bstats,
22e0f8b9 John Fastabend 2014-09-28 109 struct
gnet_stats_basic_cpu __percpu *cpu)
22e0f8b9 John Fastabend 2014-09-28 110 {
22e0f8b9 John Fastabend 2014-09-28 111 int i;
22e0f8b9 John Fastabend 2014-09-28 112
22e0f8b9 John Fastabend 2014-09-28 113 for_each_possible_cpu(i) {
22e0f8b9 John Fastabend 2014-09-28 114 struct
gnet_stats_basic_cpu *bcpu = per_cpu_ptr(cpu, i);
22e0f8b9 John Fastabend 2014-09-28 115 unsigned int start;
02c0fc1b WANG Cong 2014-10-06 116 u64 bytes;
02c0fc1b WANG Cong 2014-10-06 117 u32 packets;
22e0f8b9 John Fastabend 2014-09-28 118
22e0f8b9 John Fastabend 2014-09-28 119 do {
22e0f8b9 John Fastabend 2014-09-28 120 start =
u64_stats_fetch_begin_irq(&bcpu->syncp);
22e0f8b9 John Fastabend 2014-09-28 121 bytes =
bcpu->bstats.bytes;
22e0f8b9 John Fastabend 2014-09-28 122 packets =
bcpu->bstats.packets;
22e0f8b9 John Fastabend 2014-09-28 123 } while
(u64_stats_fetch_retry_irq(&bcpu->syncp, start));
22e0f8b9 John Fastabend 2014-09-28 124
02c0fc1b WANG Cong 2014-10-06 125 bstats->bytes += bytes;
02c0fc1b WANG Cong 2014-10-06 126 bstats->packets +=
packets;
22e0f8b9 John Fastabend 2014-09-28 127 }
22e0f8b9 John Fastabend 2014-09-28 128 }
22e0f8b9 John Fastabend 2014-09-28 129
22e0f8b9 John Fastabend 2014-09-28 130 void
edb09eb1 Eric Dumazet 2016-06-06 131 __gnet_stats_copy_basic(const
seqcount_t *running,
edb09eb1 Eric Dumazet 2016-06-06 132 struct
gnet_stats_basic_packed *bstats,
22e0f8b9 John Fastabend 2014-09-28 133 struct
gnet_stats_basic_cpu __percpu *cpu,
22e0f8b9 John Fastabend 2014-09-28 134 struct
gnet_stats_basic_packed *b)
22e0f8b9 John Fastabend 2014-09-28 135 {
edb09eb1 Eric Dumazet 2016-06-06 136 unsigned int seq;
edb09eb1 Eric Dumazet 2016-06-06 137
22e0f8b9 John Fastabend 2014-09-28 138 if (cpu) {
22e0f8b9 John Fastabend 2014-09-28 139
__gnet_stats_copy_basic_cpu(bstats, cpu);
edb09eb1 Eric Dumazet 2016-06-06 140 return;
edb09eb1 Eric Dumazet 2016-06-06 141 }
edb09eb1 Eric Dumazet 2016-06-06 142 do {
edb09eb1 Eric Dumazet 2016-06-06 143 if (running)
edb09eb1 Eric Dumazet 2016-06-06 144 seq =
read_seqcount_begin(running);
22e0f8b9 John Fastabend 2014-09-28 145 bstats->bytes =
b->bytes;
22e0f8b9 John Fastabend 2014-09-28 146 bstats->packets =
b->packets;
edb09eb1 Eric Dumazet 2016-06-06 147 } while (running &&
read_seqcount_retry(running, seq));
22e0f8b9 John Fastabend 2014-09-28 148 }
22e0f8b9 John Fastabend 2014-09-28 149
EXPORT_SYMBOL(__gnet_stats_copy_basic);
22e0f8b9 John Fastabend 2014-09-28 150
^1da177e Linus Torvalds 2005-04-16 151 /**
^1da177e Linus Torvalds 2005-04-16 152 * gnet_stats_copy_basic - copy
basic statistics into statistic TLV
^1da177e Linus Torvalds 2005-04-16 153 * @d: dumping handle
b002fdcc Luis de Bethencourt 2016-03-19 154 * @cpu: copy statistic per cpu
^1da177e Linus Torvalds 2005-04-16 155 * @b: basic statistics
^1da177e Linus Torvalds 2005-04-16 156 *
^1da177e Linus Torvalds 2005-04-16 157 * Appends the basic statistics
to the top level TLV created by
^1da177e Linus Torvalds 2005-04-16 158 * gnet_stats_start_copy().
^1da177e Linus Torvalds 2005-04-16 159 *
^1da177e Linus Torvalds 2005-04-16 160 * Returns 0 on success or -1
with the statistic lock released
^1da177e Linus Torvalds 2005-04-16 161 * if the room in the socket
buffer was not sufficient.
^1da177e Linus Torvalds 2005-04-16 162 */
^1da177e Linus Torvalds 2005-04-16 163 int
edb09eb1 Eric Dumazet 2016-06-06 164 gnet_stats_copy_basic(const
seqcount_t *running,
edb09eb1 Eric Dumazet 2016-06-06 165 struct gnet_dump
*d,
22e0f8b9 John Fastabend 2014-09-28 166 struct
gnet_stats_basic_cpu __percpu *cpu,
22e0f8b9 John Fastabend 2014-09-28 167 struct
gnet_stats_basic_packed *b)
^1da177e Linus Torvalds 2005-04-16 @168 {
22e0f8b9 John Fastabend 2014-09-28 169 struct gnet_stats_basic_packed
bstats = {0};
22e0f8b9 John Fastabend 2014-09-28 170
edb09eb1 Eric Dumazet 2016-06-06 171
__gnet_stats_copy_basic(running, &bstats, cpu, b);
:::::: The code at line 168 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torva...@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torva...@ppc970.osdl.org>
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