/* * ucon.c * * Copyright (c) 2004+ Evgeniy Polyakov * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DEBUG #define NETLINK_CONNECTOR 11 /* Hopefully your userspace connector.h matches this kernel */ #define CN_TEST_IDX CN_NETLINK_USERS + 3 #define CN_TEST_VAL 0x456 #ifdef DEBUG #define ulog(f, a...) fprintf(stdout, f, ##a) #else #define ulog(f, a...) do {} while (0) #endif static int need_exit; static __u32 seq; static int netlink_send(int s, struct cn_msg *msg) { struct nlmsghdr *nlh; unsigned int size; int err; char buf[128]; struct cn_msg *m; size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len); nlh = (struct nlmsghdr *)buf; nlh->nlmsg_seq = seq++; nlh->nlmsg_pid = getpid(); nlh->nlmsg_type = NLMSG_DONE; nlh->nlmsg_len = size; nlh->nlmsg_flags = 0; m = NLMSG_DATA(nlh); #if 0 ulog("%s: [%08x.%08x] len=%u, seq=%u, ack=%u.\n", __func__, msg->id.idx, msg->id.val, msg->len, msg->seq, msg->ack); #endif memcpy(m, msg, sizeof(*m) + msg->len); err = send(s, nlh, size, 0); if (err == -1) ulog("Failed to send: %s [%d].\n", strerror(errno), errno); return err; } static void usage(void) { printf( "Usage: ucon [options] [output file]\n" "\n" "\t-h\tthis help screen\n" "\t-s\tsend buffers to the test module\n" "\n" "The default behavior of ucon is to subscribe to the test module\n" "and wait for state messages. Any ones received are dumped to the\n" "specified output file (or stdout). The test module is assumed to\n" "have an id of {%u.%u}\n" "\n" "If you get no output, then verify the cn_test module id matches\n" "the expected id above.\n" , CN_TEST_IDX, CN_TEST_VAL ); } int main(int argc, char *argv[]) { int s; char buf[1024]; int len; struct nlmsghdr *reply; struct sockaddr_nl l_local; struct cn_msg *data; FILE *out; time_t tm; struct pollfd pfd; bool send_msgs = false; while ((s = getopt(argc, argv, "hs")) != -1) { switch (s) { case 's': send_msgs = true; break; case 'h': usage(); return 0; default: /* getopt() outputs an error for us */ usage(); return 1; } } if (argc != optind) { out = fopen(argv[optind], "a+"); if (!out) { ulog("Unable to open %s for writing: %s\n", argv[1], strerror(errno)); out = stdout; } } else out = stdout; memset(buf, 0, sizeof(buf)); s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); if (s == -1) { perror("socket"); return -1; } l_local.nl_family = AF_NETLINK; l_local.nl_groups = -1; /* bitmask of requested groups */ l_local.nl_pid = 0; ulog("subscribing to %u.%u\n", CN_TEST_IDX, CN_TEST_VAL); if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) { perror("bind"); close(s); return -1; } #if 0 { int on = 0x57; /* Additional group number */ setsockopt(s, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &on, sizeof(on)); } #endif if (send_msgs) { int i, j; memset(buf, 0, sizeof(buf)); data = (struct cn_msg *)buf; data->id.idx = CN_TEST_IDX; data->id.val = CN_TEST_VAL; data->seq = seq++; data->ack = 0; data->len = 0; for (j=0; j<10; ++j) { for (i=0; i<1000; ++i) { len = netlink_send(s, data); } ulog("%d messages have been sent to %08x.%08x.\n", i, data->id.idx, data->id.val); } return 0; } pfd.fd = s; while (!need_exit) { pfd.events = POLLIN; pfd.revents = 0; switch (poll(&pfd, 1, -1)) { case 0: need_exit = 1; break; case -1: if (errno != EINTR) { need_exit = 1; break; } continue; } if (need_exit) break; memset(buf, 0, sizeof(buf)); len = recv(s, buf, sizeof(buf), 0); if (len == -1) { perror("recv buf"); close(s); return -1; } reply = (struct nlmsghdr *)buf; switch (reply->nlmsg_type) { case NLMSG_ERROR: fprintf(out, "Error message received.\n"); fflush(out); break; case NLMSG_DONE: data = (struct cn_msg *)NLMSG_DATA(reply); time(&tm); fprintf(out, "%.24s : [%x.%x] [%08u.%08u].\n", ctime(&tm), data->id.idx, data->id.val, data->seq, data->ack); fflush(out); break; default: break; } } close(s); return 0; } a href='/cgit.cgi/linux/net-next.git/tree/?id=2fb78e89405f4321b86274a0c24b30896dd50529'>4de241e242441b80bd3f0022fc546bb07374571f /net/sched/sch_generic.c parentdd3b9f25c867cb2507a45e436d6ede8eb08e7b05 (diff)parentc14024dbb156c8392908aaa822097d27c6af8ec8 (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe: "A set of fixes for this series. This contains: - Set of fixes for the nvme target code - A revert of patch from this merge window, causing a regression with WRITE_SAME on iSCSI targets at least. - A fix for a use-after-free in the new O_DIRECT bdev code. - Two fixes for the xen-blkfront driver" * 'for-linus' of git://git.kernel.dk/linux-block: Revert "sd: remove __data_len hack for WRITE SAME" nvme-fc: use blk_rq_nr_phys_segments nvmet-rdma: Fix missing dma sync to nvme data structures nvmet: Call fatal_error from keep-alive timout expiration nvmet: cancel fatal error and flush async work before free controller nvmet: delete controllers deletion upon subsystem release nvmet_fc: correct logic in disconnect queue LS handling block: fix use after free in __blkdev_direct_IO xen-blkfront: correct maximum segment accounting xen-blkfront: feature flags handling adjustments
Diffstat (limited to 'net/sched/sch_generic.c')