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-rw-r--r--lib/Kconfig8
-rw-r--r--lib/Kconfig.debug11
-rw-r--r--lib/Makefile4
-rw-r--r--lib/crypto/Makefile4
-rw-r--r--lib/crypto/arc4.c74
-rw-r--r--lib/digsig.c2
-rw-r--r--lib/dim/Makefile9
-rw-r--r--lib/dim/dim.c83
-rw-r--r--lib/dim/net_dim.c190
-rw-r--r--lib/list_sort.c2
-rw-r--r--lib/objagg.c6
-rw-r--r--lib/sbitmap.c10
-rw-r--r--lib/scatterlist.c9
-rw-r--r--lib/string_helpers.c19
-rw-r--r--lib/test_blackhole_dev.c100
-rw-r--r--lib/vsprintf.c4
16 files changed, 515 insertions, 20 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 8c8eefc5e54c..52a7b2e6fb74 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -562,6 +562,14 @@ config SIGNATURE
Digital signature verification. Currently only RSA is supported.
Implementation is done using GnuPG MPI library
+config DIMLIB
+ bool "DIM library"
+ default y
+ help
+ Dynamic Interrupt Moderation library.
+ Implements an algorithm for dynamically change CQ modertion values
+ according to run time performance.
+
#
# libfdt files, only selected if needed.
#
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 06d9c9d70385..d4c8c9323aa4 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1701,7 +1701,7 @@ config LKDTM
called lkdtm.
Documentation on how to use the module can be found in
- Documentation/fault-injection/provoke-crashes.txt
+ Documentation/fault-injection/provoke-crashes.rst
config TEST_LIST_SORT
tristate "Linked list sorting test"
@@ -1929,6 +1929,15 @@ config TEST_BPF
If unsure, say N.
+config TEST_BLACKHOLE_DEV
+ tristate "Test blackhole netdev functionality"
+ depends on m && NET
+ help
+ This builds the "test_blackhole_dev" module that validates the
+ data path through this blackhole netdev.
+
+ If unsure, say N.
+
config FIND_BIT_BENCHMARK
tristate "Test find_bit functions"
help
diff --git a/lib/Makefile b/lib/Makefile
index fb7697031a79..fdd56bc219b8 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -91,6 +91,7 @@ obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o
obj-$(CONFIG_TEST_OBJAGG) += test_objagg.o
obj-$(CONFIG_TEST_STACKINIT) += test_stackinit.o
+obj-$(CONFIG_TEST_BLACKHOLE_DEV) += test_blackhole_dev.o
obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/
@@ -102,7 +103,7 @@ endif
obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
-obj-y += math/
+obj-y += math/ crypto/
obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
@@ -202,6 +203,7 @@ obj-$(CONFIG_GLOB) += glob.o
obj-$(CONFIG_GLOB_SELFTEST) += globtest.o
obj-$(CONFIG_MPILIB) += mpi/
+obj-$(CONFIG_DIMLIB) += dim/
obj-$(CONFIG_SIGNATURE) += digsig.o
lib-$(CONFIG_CLZ_TAB) += clz_tab.o
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
new file mode 100644
index 000000000000..88195c34932d
--- /dev/null
+++ b/lib/crypto/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_CRYPTO_LIB_ARC4) += libarc4.o
+libarc4-y := arc4.o
diff --git a/lib/crypto/arc4.c b/lib/crypto/arc4.c
new file mode 100644
index 000000000000..c2020f19c652
--- /dev/null
+++ b/lib/crypto/arc4.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Cryptographic API
+ *
+ * ARC4 Cipher Algorithm
+ *
+ * Jon Oberheide <jon@oberheide.org>
+ */
+
+#include <crypto/arc4.h>
+#include <linux/module.h>
+
+int arc4_setkey(struct arc4_ctx *ctx, const u8 *in_key, unsigned int key_len)
+{
+ int i, j = 0, k = 0;
+
+ ctx->x = 1;
+ ctx->y = 0;
+
+ for (i = 0; i < 256; i++)
+ ctx->S[i] = i;
+
+ for (i = 0; i < 256; i++) {
+ u32 a = ctx->S[i];
+
+ j = (j + in_key[k] + a) & 0xff;
+ ctx->S[i] = ctx->S[j];
+ ctx->S[j] = a;
+ if (++k >= key_len)
+ k = 0;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(arc4_setkey);
+
+void arc4_crypt(struct arc4_ctx *ctx, u8 *out, const u8 *in, unsigned int len)
+{
+ u32 *const S = ctx->S;
+ u32 x, y, a, b;
+ u32 ty, ta, tb;
+
+ if (len == 0)
+ return;
+
+ x = ctx->x;
+ y = ctx->y;
+
+ a = S[x];
+ y = (y + a) & 0xff;
+ b = S[y];
+
+ do {
+ S[y] = a;
+ a = (a + b) & 0xff;
+ S[x] = b;
+ x = (x + 1) & 0xff;
+ ta = S[x];
+ ty = (y + ta) & 0xff;
+ tb = S[ty];
+ *out++ = *in++ ^ S[a];
+ if (--len == 0)
+ break;
+ y = ty;
+ a = ta;
+ b = tb;
+ } while (true);
+
+ ctx->x = x;
+ ctx->y = y;
+}
+EXPORT_SYMBOL(arc4_crypt);
+
+MODULE_LICENSE("GPL");
diff --git a/lib/digsig.c b/lib/digsig.c
index 3cf89c775ab2..e0627c3e53b2 100644
--- a/lib/digsig.c
+++ b/lib/digsig.c
@@ -218,7 +218,7 @@ int digsig_verify(struct key *keyring, const char *sig, int siglen,
/* search in specific keyring */
key_ref_t kref;
kref = keyring_search(make_key_ref(keyring, 1UL),
- &key_type_user, name);
+ &key_type_user, name, true);
if (IS_ERR(kref))
key = ERR_CAST(kref);
else
diff --git a/lib/dim/Makefile b/lib/dim/Makefile
new file mode 100644
index 000000000000..160afe288df0
--- /dev/null
+++ b/lib/dim/Makefile
@@ -0,0 +1,9 @@
+#
+# DIM Dynamic Interrupt Moderation library
+#
+
+obj-$(CONFIG_DIMLIB) = net_dim.o
+
+net_dim-y = \
+ dim.o \
+ net_dim.o
diff --git a/lib/dim/dim.c b/lib/dim/dim.c
new file mode 100644
index 000000000000..439d641ec796
--- /dev/null
+++ b/lib/dim/dim.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
+ */
+
+#include <linux/dim.h>
+
+bool dim_on_top(struct dim *dim)
+{
+ switch (dim->tune_state) {
+ case DIM_PARKING_ON_TOP:
+ case DIM_PARKING_TIRED:
+ return true;
+ case DIM_GOING_RIGHT:
+ return (dim->steps_left > 1) && (dim->steps_right == 1);
+ default: /* DIM_GOING_LEFT */
+ return (dim->steps_right > 1) && (dim->steps_left == 1);
+ }
+}
+EXPORT_SYMBOL(dim_on_top);
+
+void dim_turn(struct dim *dim)
+{
+ switch (dim->tune_state) {
+ case DIM_PARKING_ON_TOP:
+ case DIM_PARKING_TIRED:
+ break;
+ case DIM_GOING_RIGHT:
+ dim->tune_state = DIM_GOING_LEFT;
+ dim->steps_left = 0;
+ break;
+ case DIM_GOING_LEFT:
+ dim->tune_state = DIM_GOING_RIGHT;
+ dim->steps_right = 0;
+ break;
+ }
+}
+EXPORT_SYMBOL(dim_turn);
+
+void dim_park_on_top(struct dim *dim)
+{
+ dim->steps_right = 0;
+ dim->steps_left = 0;
+ dim->tired = 0;
+ dim->tune_state = DIM_PARKING_ON_TOP;
+}
+EXPORT_SYMBOL(dim_park_on_top);
+
+void dim_park_tired(struct dim *dim)
+{
+ dim->steps_right = 0;
+ dim->steps_left = 0;
+ dim->tune_state = DIM_PARKING_TIRED;
+}
+EXPORT_SYMBOL(dim_park_tired);
+
+void dim_calc_stats(struct dim_sample *start, struct dim_sample *end,
+ struct dim_stats *curr_stats)
+{
+ /* u32 holds up to 71 minutes, should be enough */
+ u32 delta_us = ktime_us_delta(end->time, start->time);
+ u32 npkts = BIT_GAP(BITS_PER_TYPE(u32), end->pkt_ctr, start->pkt_ctr);
+ u32 nbytes = BIT_GAP(BITS_PER_TYPE(u32), end->byte_ctr,
+ start->byte_ctr);
+ u32 ncomps = BIT_GAP(BITS_PER_TYPE(u32), end->comp_ctr,
+ start->comp_ctr);
+
+ if (!delta_us)
+ return;
+
+ curr_stats->ppms = DIV_ROUND_UP(npkts * USEC_PER_MSEC, delta_us);
+ curr_stats->bpms = DIV_ROUND_UP(nbytes * USEC_PER_MSEC, delta_us);
+ curr_stats->epms = DIV_ROUND_UP(DIM_NEVENTS * USEC_PER_MSEC,
+ delta_us);
+ curr_stats->cpms = DIV_ROUND_UP(ncomps * USEC_PER_MSEC, delta_us);
+ if (curr_stats->epms != 0)
+ curr_stats->cpe_ratio =
+ (curr_stats->cpms * 100) / curr_stats->epms;
+ else
+ curr_stats->cpe_ratio = 0;
+
+}
+EXPORT_SYMBOL(dim_calc_stats);
diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c
new file mode 100644
index 000000000000..5bcc902c5388
--- /dev/null
+++ b/lib/dim/net_dim.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
+ */
+
+#include <linux/dim.h>
+
+struct dim_cq_moder
+net_dim_get_rx_moderation(u8 cq_period_mode, int ix)
+{
+ struct dim_cq_moder cq_moder = rx_profile[cq_period_mode][ix];
+
+ cq_moder.cq_period_mode = cq_period_mode;
+ return cq_moder;
+}
+EXPORT_SYMBOL(net_dim_get_rx_moderation);
+
+struct dim_cq_moder
+net_dim_get_def_rx_moderation(u8 cq_period_mode)
+{
+ u8 profile_ix = cq_period_mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE ?
+ NET_DIM_DEF_PROFILE_CQE : NET_DIM_DEF_PROFILE_EQE;
+
+ return net_dim_get_rx_moderation(cq_period_mode, profile_ix);
+}
+EXPORT_SYMBOL(net_dim_get_def_rx_moderation);
+
+struct dim_cq_moder
+net_dim_get_tx_moderation(u8 cq_period_mode, int ix)
+{
+ struct dim_cq_moder cq_moder = tx_profile[cq_period_mode][ix];
+
+ cq_moder.cq_period_mode = cq_period_mode;
+ return cq_moder;
+}
+EXPORT_SYMBOL(net_dim_get_tx_moderation);
+
+struct dim_cq_moder
+net_dim_get_def_tx_moderation(u8 cq_period_mode)
+{
+ u8 profile_ix = cq_period_mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE ?
+ NET_DIM_DEF_PROFILE_CQE : NET_DIM_DEF_PROFILE_EQE;
+
+ return net_dim_get_tx_moderation(cq_period_mode, profile_ix);
+}
+EXPORT_SYMBOL(net_dim_get_def_tx_moderation);
+
+static int net_dim_step(struct dim *dim)
+{
+ if (dim->tired == (NET_DIM_PARAMS_NUM_PROFILES * 2))
+ return DIM_TOO_TIRED;
+
+ switch (dim->tune_state) {
+ case DIM_PARKING_ON_TOP:
+ case DIM_PARKING_TIRED:
+ break;
+ case DIM_GOING_RIGHT:
+ if (dim->profile_ix == (NET_DIM_PARAMS_NUM_PROFILES - 1))
+ return DIM_ON_EDGE;
+ dim->profile_ix++;
+ dim->steps_right++;
+ break;
+ case DIM_GOING_LEFT:
+ if (dim->profile_ix == 0)
+ return DIM_ON_EDGE;
+ dim->profile_ix--;
+ dim->steps_left++;
+ break;
+ }
+
+ dim->tired++;
+ return DIM_STEPPED;
+}
+
+static void net_dim_exit_parking(struct dim *dim)
+{
+ dim->tune_state = dim->profile_ix ? DIM_GOING_LEFT : DIM_GOING_RIGHT;
+ net_dim_step(dim);
+}
+
+static int net_dim_stats_compare(struct dim_stats *curr,
+ struct dim_stats *prev)
+{
+ if (!prev->bpms)
+ return curr->bpms ? DIM_STATS_BETTER : DIM_STATS_SAME;
+
+ if (IS_SIGNIFICANT_DIFF(curr->bpms, prev->bpms))
+ return (curr->bpms > prev->bpms) ? DIM_STATS_BETTER :
+ DIM_STATS_WORSE;
+
+ if (!prev->ppms)
+ return curr->ppms ? DIM_STATS_BETTER :
+ DIM_STATS_SAME;
+
+ if (IS_SIGNIFICANT_DIFF(curr->ppms, prev->ppms))
+ return (curr->ppms > prev->ppms) ? DIM_STATS_BETTER :
+ DIM_STATS_WORSE;
+
+ if (!prev->epms)
+ return DIM_STATS_SAME;
+
+ if (IS_SIGNIFICANT_DIFF(curr->epms, prev->epms))
+ return (curr->epms < prev->epms) ? DIM_STATS_BETTER :
+ DIM_STATS_WORSE;
+
+ return DIM_STATS_SAME;
+}
+
+static bool net_dim_decision(struct dim_stats *curr_stats, struct dim *dim)
+{
+ int prev_state = dim->tune_state;
+ int prev_ix = dim->profile_ix;
+ int stats_res;
+ int step_res;
+
+ switch (dim->tune_state) {
+ case DIM_PARKING_ON_TOP:
+ stats_res = net_dim_stats_compare(curr_stats,
+ &dim->prev_stats);
+ if (stats_res != DIM_STATS_SAME)
+ net_dim_exit_parking(dim);
+ break;
+
+ case DIM_PARKING_TIRED:
+ dim->tired--;
+ if (!dim->tired)
+ net_dim_exit_parking(dim);
+ break;
+
+ case DIM_GOING_RIGHT:
+ case DIM_GOING_LEFT:
+ stats_res = net_dim_stats_compare(curr_stats,
+ &dim->prev_stats);
+ if (stats_res != DIM_STATS_BETTER)
+ dim_turn(dim);
+
+ if (dim_on_top(dim)) {
+ dim_park_on_top(dim);
+ break;
+ }
+
+ step_res = net_dim_step(dim);
+ switch (step_res) {
+ case DIM_ON_EDGE:
+ dim_park_on_top(dim);
+ break;
+ case DIM_TOO_TIRED:
+ dim_park_tired(dim);
+ break;
+ }
+
+ break;
+ }
+
+ if (prev_state != DIM_PARKING_ON_TOP ||
+ dim->tune_state != DIM_PARKING_ON_TOP)
+ dim->prev_stats = *curr_stats;
+
+ return dim->profile_ix != prev_ix;
+}
+
+void net_dim(struct dim *dim, struct dim_sample end_sample)
+{
+ struct dim_stats curr_stats;
+ u16 nevents;
+
+ switch (dim->state) {
+ case DIM_MEASURE_IN_PROGRESS:
+ nevents = BIT_GAP(BITS_PER_TYPE(u16),
+ end_sample.event_ctr,
+ dim->start_sample.event_ctr);
+ if (nevents < DIM_NEVENTS)
+ break;
+ dim_calc_stats(&dim->start_sample, &end_sample, &curr_stats);
+ if (net_dim_decision(&curr_stats, dim)) {
+ dim->state = DIM_APPLY_NEW_PROFILE;
+ schedule_work(&dim->work);
+ break;
+ }
+ /* fall through */
+ case DIM_START_MEASURE:
+ dim_update_sample(end_sample.event_ctr, end_sample.pkt_ctr,
+ end_sample.byte_ctr, &dim->start_sample);
+ dim->state = DIM_MEASURE_IN_PROGRESS;
+ break;
+ case DIM_APPLY_NEW_PROFILE:
+ break;
+ }
+}
+EXPORT_SYMBOL(net_dim);
diff --git a/lib/list_sort.c b/lib/list_sort.c
index 712ed1f4eb64..52f0c258c895 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -157,9 +157,11 @@ static void merge_final(void *priv, cmp_func cmp, struct list_head *head,
*
* The number of pending lists of size 2^k is determined by the
* state of bit k of "count" plus two extra pieces of information:
+ *
* - The state of bit k-1 (when k == 0, consider bit -1 always set), and
* - Whether the higher-order bits are zero or non-zero (i.e.
* is count >= 2^(k+1)).
+ *
* There are six states we distinguish. "x" represents some arbitrary
* bits, and "y" represents some arbitrary non-zero bits:
* 0: 00x: 0 pending of size 2^k; x pending of sizes < 2^k
diff --git a/lib/objagg.c b/lib/objagg.c
index 576be22e86de..55621fb82e0a 100644
--- a/lib/objagg.c
+++ b/lib/objagg.c
@@ -605,12 +605,10 @@ const struct objagg_stats *objagg_stats_get(struct objagg *objagg)
{
struct objagg_stats *objagg_stats;
struct objagg_obj *objagg_obj;
- size_t alloc_size;
int i;
- alloc_size = sizeof(*objagg_stats) +
- sizeof(objagg_stats->stats_info[0]) * objagg->obj_count;
- objagg_stats = kzalloc(alloc_size, GFP_KERNEL);
+ objagg_stats = kzalloc(struct_size(objagg_stats, stats_info,
+ objagg->obj_count), GFP_KERNEL);
if (!objagg_stats)
return ERR_PTR(-ENOMEM);
diff --git a/lib/sbitmap.c b/lib/sbitmap.c
index 54f57cd117c6..969e5400a615 100644
--- a/lib/sbitmap.c
+++ b/lib/sbitmap.c
@@ -26,9 +26,7 @@ static inline bool sbitmap_deferred_clear(struct sbitmap *sb, int index)
/*
* First get a stable cleared mask, setting the old mask to 0.
*/
- do {
- mask = sb->map[index].cleared;
- } while (cmpxchg(&sb->map[index].cleared, mask, 0) != mask);
+ mask = xchg(&sb->map[index].cleared, 0);
/*
* Now clear the masked bits in our free word
@@ -516,10 +514,8 @@ static struct sbq_wait_state *sbq_wake_ptr(struct sbitmap_queue *sbq)
struct sbq_wait_state *ws = &sbq->ws[wake_index];
if (waitqueue_active(&ws->wait)) {
- int o = atomic_read(&sbq->wake_index);
-
- if (wake_index != o)
- atomic_cmpxchg(&sbq->wake_index, o, wake_index);
+ if (wake_index != atomic_read(&sbq->wake_index))
+ atomic_set(&sbq->wake_index, wake_index);
return ws;
}
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 2882d9ba6607..eacb82468437 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -676,17 +676,18 @@ static bool sg_miter_get_next_page(struct sg_mapping_iter *miter)
{
if (!miter->__remaining) {
struct scatterlist *sg;
- unsigned long pgoffset;
if (!__sg_page_iter_next(&miter->piter))
return false;
sg = miter->piter.sg;
- pgoffset = miter->piter.sg_pgoffset;
- miter->__offset = pgoffset ? 0 : sg->offset;
+ miter->__offset = miter->piter.sg_pgoffset ? 0 : sg->offset;
+ miter->piter.sg_pgoffset += miter->__offset >> PAGE_SHIFT;
+ miter->__offset &= PAGE_SIZE - 1;
miter->__remaining = sg->offset + sg->length -
- (pgoffset << PAGE_SHIFT) - miter->__offset;
+ (miter->piter.sg_pgoffset << PAGE_SHIFT) -
+ miter->__offset;
miter->__remaining = min_t(unsigned long, miter->__remaining,
PAGE_SIZE - miter->__offset);
}
diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index 4403e1924f73..3a90a9e2b94a 100644
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -540,6 +540,25 @@ int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
}
EXPORT_SYMBOL(string_escape_mem);
+int string_escape_mem_ascii(const char *src, size_t isz, char *dst,
+ size_t osz)
+{
+ char *p = dst;
+ char *end = p + osz;
+
+ while (isz--) {
+ unsigned char c = *src++;
+
+ if (!isprint(c) || !isascii(c) || c == '"' || c == '\\')
+ escape_hex(c, &p, end);
+ else
+ escape_passthrough(c, &p, end);
+ }
+
+ return p - dst;
+}
+EXPORT_SYMBOL(string_escape_mem_ascii);
+
/*
* Return an allocated string that has been escaped of special characters
* and double quotes, making it safe to log in quotes.
diff --git a/lib/test_blackhole_dev.c b/lib/test_blackhole_dev.c
new file mode 100644
index 000000000000..4c40580a99a3
--- /dev/null
+++ b/lib/test_blackhole_dev.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This module tests the blackhole_dev that is created during the
+ * net subsystem initialization. The test this module performs is
+ * by injecting an skb into the stack with skb->dev as the
+ * blackhole_dev and expects kernel to behave in a sane manner
+ * (in other words, *not crash*)!
+ *
+ * Copyright (c) 2018, Mahesh Bandewar <maheshb@google.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/udp.h>
+#include <linux/ipv6.h>
+
+#include <net/dst.h>
+
+#define SKB_SIZE 256
+#define HEAD_SIZE (14+40+8) /* Ether + IPv6 + UDP */
+#define TAIL_SIZE 32 /* random tail-room */
+
+#define UDP_PORT 1234
+
+static int __init test_blackholedev_init(void)
+{
+ struct ipv6hdr *ip6h;
+ struct sk_buff *skb;
+ struct ethhdr *ethh;
+ struct udphdr *uh;
+ int data_len;
+ int ret;
+
+ skb = alloc_skb(SKB_SIZE, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ /* Reserve head-room for the headers */
+ skb_reserve(skb, HEAD_SIZE);
+
+ /* Add data to the skb */
+ data_len = SKB_SIZE - (HEAD_SIZE + TAIL_SIZE);
+ memset(__skb_put(skb, data_len), 0xf, data_len);
+
+ /* Add protocol data */
+ /* (Transport) UDP */
+ uh = (struct udphdr *)skb_push(skb, sizeof(struct udphdr));
+ skb_set_transport_header(skb, 0);
+ uh->source = uh->dest = htons(UDP_PORT);
+ uh->len = htons(data_len);
+ uh->check = 0;
+ /* (Network) IPv6 */
+ ip6h = (struct ipv6hdr *)skb_push(skb, sizeof(struct ipv6hdr));
+ skb_set_network_header(skb, 0);
+ ip6h->hop_limit = 32;
+ ip6h->payload_len = data_len + sizeof(struct udphdr);
+ ip6h->nexthdr = IPPROTO_UDP;
+ ip6h->saddr = in6addr_loopback;
+ ip6h->daddr = in6addr_loopback;
+ /* Ether */
+ ethh = (struct ethhdr *)skb_push(skb, sizeof(struct ethhdr));
+ skb_set_mac_header(skb, 0);
+
+ skb->protocol = htons(ETH_P_IPV6);
+ skb->pkt_type = PACKET_HOST;
+ skb->dev = blackhole_netdev;
+
+ /* Now attempt to send the packet */
+ ret = dev_queue_xmit(skb);
+
+ switch (ret) {
+ case NET_XMIT_SUCCESS:
+ pr_warn("dev_queue_xmit() returned NET_XMIT_SUCCESS\n");
+ break;
+ case NET_XMIT_DROP:
+ pr_warn("dev_queue_xmit() returned NET_XMIT_DROP\n");
+ break;
+ case NET_XMIT_CN:
+ pr_warn("dev_queue_xmit() returned NET_XMIT_CN\n");
+ break;
+ default:
+ pr_err("dev_queue_xmit() returned UNKNOWN(%d)\n", ret);
+ }
+
+ return 0;
+}
+
+static void __exit test_blackholedev_exit(void)
+{
+ pr_warn("test_blackholedev module terminating.\n");
+}
+
+module_init(test_blackholedev_init);
+module_exit(test_blackholedev_exit);
+
+MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
+MODULE_LICENSE("GPL");
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 63937044c57d..b0967cf17137 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -599,7 +599,7 @@ static char *string_nocheck(char *buf, char *end, const char *s,
struct printf_spec spec)
{
int len = 0;
- size_t lim = spec.precision;
+ int lim = spec.precision;
while (lim--) {
char c = *s++;
@@ -1799,7 +1799,7 @@ char *clock(char *buf, char *end, struct clk *clk, struct printf_spec spec,
#ifdef CONFIG_COMMON_CLK
return string(buf, end, __clk_get_name(clk), spec);
#else
- return error_string(buf, end, "(%pC?)", spec);
+ return ptr_to_id(buf, end, clk, spec);
#endif
}
}
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-03 19:40:50 +0300