diff options
| -rw-r--r-- | tools/accounting/getdelays.c | 41 | ||||
| -rw-r--r-- | tools/accounting/procacct.c | 40 |
2 files changed, 73 insertions, 8 deletions
diff --git a/tools/accounting/getdelays.c b/tools/accounting/getdelays.c index 50792df27707..368a622ca027 100644 --- a/tools/accounting/getdelays.c +++ b/tools/accounting/getdelays.c @@ -60,7 +60,7 @@ int print_task_context_switch_counts; } /* Maximum size of response requested or message sent */ -#define MAX_MSG_SIZE 1024 +#define MAX_MSG_SIZE 2048 /* Maximum number of cpus expected to be specified in a cpumask */ #define MAX_CPUS 32 @@ -115,6 +115,32 @@ error: return -1; } +static int recv_taskstats_msg(int sd, struct msgtemplate *msg) +{ + struct sockaddr_nl nladdr; + struct iovec iov = { + .iov_base = msg, + .iov_len = sizeof(*msg), + }; + struct msghdr hdr = { + .msg_name = &nladdr, + .msg_namelen = sizeof(nladdr), + .msg_iov = &iov, + .msg_iovlen = 1, + }; + int ret; + + ret = recvmsg(sd, &hdr, 0); + if (ret < 0) + return -1; + if (hdr.msg_flags & MSG_TRUNC) { + errno = EMSGSIZE; + return -1; + } + + return ret; +} + static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid, __u8 genl_cmd, __u16 nla_type, @@ -633,12 +659,16 @@ int main(int argc, char *argv[]) } do { - rep_len = recv(nl_sd, &msg, sizeof(msg), 0); + rep_len = recv_taskstats_msg(nl_sd, &msg); PRINTF("received %d bytes\n", rep_len); if (rep_len < 0) { - fprintf(stderr, "nonfatal reply error: errno %d\n", - errno); + if (errno == EMSGSIZE) + fprintf(stderr, + "dropped truncated taskstats netlink message, please increase MAX_MSG_SIZE\n"); + else + fprintf(stderr, "nonfatal reply error: errno %d\n", + errno); continue; } if (msg.n.nlmsg_type == NLMSG_ERROR || @@ -680,6 +710,9 @@ int main(int argc, char *argv[]) printf("TGID\t%d\n", rtid); break; case TASKSTATS_TYPE_STATS: + PRINTF("version %u\n", + ((struct taskstats *) + NLA_DATA(na))->version); if (print_delays) print_delayacct((struct taskstats *) NLA_DATA(na)); if (print_io_accounting) diff --git a/tools/accounting/procacct.c b/tools/accounting/procacct.c index e8dee05a6264..46e5986ad927 100644 --- a/tools/accounting/procacct.c +++ b/tools/accounting/procacct.c @@ -71,7 +71,7 @@ int print_task_context_switch_counts; } /* Maximum size of response requested or message sent */ -#define MAX_MSG_SIZE 1024 +#define MAX_MSG_SIZE 2048 /* Maximum number of cpus expected to be specified in a cpumask */ #define MAX_CPUS 32 @@ -121,6 +121,32 @@ error: return -1; } +static int recv_taskstats_msg(int sd, struct msgtemplate *msg) +{ + struct sockaddr_nl nladdr; + struct iovec iov = { + .iov_base = msg, + .iov_len = sizeof(*msg), + }; + struct msghdr hdr = { + .msg_name = &nladdr, + .msg_namelen = sizeof(nladdr), + .msg_iov = &iov, + .msg_iovlen = 1, + }; + int ret; + + ret = recvmsg(sd, &hdr, 0); + if (ret < 0) + return -1; + if (hdr.msg_flags & MSG_TRUNC) { + errno = EMSGSIZE; + return -1; + } + + return ret; +} + static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid, __u8 genl_cmd, __u16 nla_type, @@ -239,6 +265,8 @@ void handle_aggr(int mother, struct nlattr *na, int fd) PRINTF("TGID\t%d\n", rtid); break; case TASKSTATS_TYPE_STATS: + PRINTF("version %u\n", + ((struct taskstats *)NLA_DATA(na))->version); if (mother == TASKSTATS_TYPE_AGGR_PID) print_procacct((struct taskstats *) NLA_DATA(na)); if (fd) { @@ -347,12 +375,16 @@ int main(int argc, char *argv[]) } do { - rep_len = recv(nl_sd, &msg, sizeof(msg), 0); + rep_len = recv_taskstats_msg(nl_sd, &msg); PRINTF("received %d bytes\n", rep_len); if (rep_len < 0) { - fprintf(stderr, "nonfatal reply error: errno %d\n", - errno); + if (errno == EMSGSIZE) + fprintf(stderr, + "dropped truncated taskstats netlink message, please increase MAX_MSG_SIZE\n"); + else + fprintf(stderr, "nonfatal reply error: errno %d\n", + errno); continue; } if (msg.n.nlmsg_type == NLMSG_ERROR || |