/* * Controller of read/write threads for virtio-trace * * Copyright (C) 2012 Hitachi, Ltd. * Created by Yoshihiro Yunomae * Masami Hiramatsu * * Licensed under GPL version 2 only. * */ #define _GNU_SOURCE #include #include #include #include #include #include #include "trace-agent.h" #define HOST_MSG_SIZE 256 #define EVENT_WAIT_MSEC 100 static volatile sig_atomic_t global_signal_val; bool global_sig_receive; /* default false */ bool global_run_operation; /* default false*/ /* Handle SIGTERM/SIGINT/SIGQUIT to exit */ static void signal_handler(int sig) { global_signal_val = sig; } int rw_ctl_init(const char *ctl_path) { int ctl_fd; ctl_fd = open(ctl_path, O_RDONLY); if (ctl_fd == -1) { pr_err("Cannot open ctl_fd\n"); goto error; } return ctl_fd; error: exit(EXIT_FAILURE); } static int wait_order(int ctl_fd) { struct pollfd poll_fd; int ret = 0; while (!global_sig_receive) { poll_fd.fd = ctl_fd; poll_fd.events = POLLIN; ret = poll(&poll_fd, 1, EVENT_WAIT_MSEC); if (global_signal_val) { global_sig_receive = true; pr_info("Receive interrupt %d\n", global_signal_val); /* Wakes rw-threads when they are sleeping */ if (!global_run_operation) pthread_cond_broadcast(&cond_wakeup); ret = -1; break; } if (ret < 0) { pr_err("Polling error\n"); goto error; } if (ret) break; }; return ret; error: exit(EXIT_FAILURE); } /* * contol read/write threads by handling global_run_operation */ void *rw_ctl_loop(int ctl_fd) { ssize_t rlen; char buf[HOST_MSG_SIZE]; int ret; /* Setup signal handlers */ signal(SIGTERM, signal_handler); signal(SIGINT, signal_handler); signal(SIGQUIT, signal_handler); while (!global_sig_receive) { ret = wait_order(ctl_fd); if (ret < 0) break; rlen = read(ctl_fd, buf, sizeof(buf)); if (rlen < 0) { pr_err("read data error in ctl thread\n"); goto error; } if (rlen == 2 && buf[0] == '1') { /* * If host writes '1' to a control path, * this controller wakes all read/write threads. */ global_run_operation = true; pthread_cond_broadcast(&cond_wakeup); pr_debug("Wake up all read/write threads\n"); } else if (rlen == 2 && buf[0] == '0') { /* * If host writes '0' to a control path, read/write * threads will wait for notification from Host. */ global_run_operation = false; pr_debug("Stop all read/write threads\n"); } else pr_info("Invalid host notification: %s\n", buf); } return NULL; error: exit(EXIT_FAILURE); } >
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authorDavid S. Miller <davem@davemloft.net>2017-02-10 13:51:05 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-10 13:51:05 -0500
commit1254856c07e0e5707d3291f625db8ed69a866be2 (patch)
tree40907b346d00bd22b9db7a48702a0541d8ded3bb /net/sunrpc/xprtrdma
parente3f29c4809a5f562adc345c48ed9785f2597df78 (diff)
parent4d56a29f17508b2eb8bee66b8f0e3679201fa807 (diff)
Merge branch 'dsa-phy-include'
Florian Fainelli says: ==================== net: dsa: remove unnecessary phy.h include Including phy.h and phy_fixed.h into net/dsa.h causes phy*.h to be an unnecessary dependency for quite a large amount of the kernel. There's very little which actually requires definitions from phy.h in net/dsa.h - the include itself only wants the declaration of a couple of structures and IFNAMSIZ. Add linux/if.h for IFNAMSIZ, declarations for the structures, phy.h to mv88e6xxx.h as it needs it for phy_interface_t, and remove both phy.h and phy_fixed.h from net/dsa.h. This patch reduces from around 800 files rebuilt to around 40 - even with ccache, the time difference is noticable. In order to make this change, several drivers need to be updated to include necessary headers that they were picking up through this include. This has resulted in a much larger patch series. I'm assuming the 0-day builder has had 24 hours with this series, and hasn't reported any further issues with it - the last issue was two weeks ago (before I became ill) which I fixed over the last weekend. I'm hoping this doesn't conflict with what's already in net-next... David, this should probably go via your tree considering the diffstat. Changes in v2: - took Russell's patch series - removed Qualcomm EMAC patch - rebased against net-next/master ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sunrpc/xprtrdma')
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_backchannel.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c