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Diffstat (limited to 'src/journal/journald.c')
-rw-r--r--src/journal/journald.c375
1 files changed, 317 insertions, 58 deletions
diff --git a/src/journal/journald.c b/src/journal/journald.c
index 89d8bee2a2..453495a964 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -27,6 +27,9 @@
#include <fcntl.h>
#include <sys/acl.h>
#include <acl/libacl.h>
+#include <stddef.h>
+#include <sys/ioctl.h>
+#include <linux/sockios.h>
#include "hashmap.h"
#include "journal-file.h"
@@ -36,15 +39,19 @@
#include "cgroup-util.h"
typedef struct Server {
- int syslog_fd;
int epoll_fd;
int signal_fd;
+ int syslog_fd;
+ int native_fd;
JournalFile *runtime_journal;
JournalFile *system_journal;
Hashmap *user_journals;
uint64_t seqnum;
+
+ char *buffer;
+ size_t buffer_size;
} Server;
static void fix_perms(JournalFile *f, uid_t uid) {
@@ -137,35 +144,27 @@ static JournalFile* find_journal(Server *s, uid_t uid) {
return f;
}
-static void process_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
- char *message = NULL, *pid = NULL, *uid = NULL, *gid = NULL,
+static void dispatch_message(Server *s, struct iovec *iovec, unsigned n, unsigned m, struct ucred *ucred, struct timeval *tv) {
+ char *pid = NULL, *uid = NULL, *gid = NULL,
*source_time = NULL, *boot_id = NULL, *machine_id = NULL,
*comm = NULL, *cmdline = NULL, *hostname = NULL,
*audit_session = NULL, *audit_loginuid = NULL,
- *syslog_priority = NULL, *syslog_facility = NULL,
*exe = NULL, *cgroup = NULL;
- struct iovec iovec[17];
- unsigned n = 0;
+
char idbuf[33];
sd_id128_t id;
int r;
char *t;
- int priority = LOG_USER | LOG_INFO;
uid_t loginuid = 0, realuid = 0;
JournalFile *f;
- parse_syslog_priority((char**) &buf, &priority);
- skip_syslog_date((char**) &buf);
-
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
+ assert(s);
+ assert(iovec || n == 0);
- if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_facility);
+ if (n == 0)
+ return;
- message = strappend("MESSAGE=", buf);
- if (message)
- IOVEC_SET_STRING(iovec[n++], message);
+ assert(n + 13 <= m);
if (ucred) {
uint32_t session;
@@ -252,6 +251,8 @@ static void process_message(Server *s, const char *buf, struct ucred *ucred, str
free(t);
}
+ assert(n <= m);
+
f = find_journal(s, realuid == 0 ? 0 : loginuid);
if (!f)
log_warning("Dropping message, as we can't find a place to store the data.");
@@ -262,7 +263,6 @@ static void process_message(Server *s, const char *buf, struct ucred *ucred, str
log_error("Failed to write entry, ignoring: %s", strerror(-r));
}
- free(message);
free(pid);
free(uid);
free(gid);
@@ -275,9 +275,148 @@ static void process_message(Server *s, const char *buf, struct ucred *ucred, str
free(hostname);
free(audit_session);
free(audit_loginuid);
+ free(cgroup);
+
+}
+
+static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
+ char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL;
+ struct iovec iovec[16];
+ unsigned n = 0;
+ int priority = LOG_USER | LOG_INFO;
+
+ assert(s);
+ assert(buf);
+
+ parse_syslog_priority((char**) &buf, &priority);
+ skip_syslog_date((char**) &buf);
+
+ if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
+
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+
+ message = strappend("MESSAGE=", buf);
+ if (message)
+ IOVEC_SET_STRING(iovec[n++], message);
+
+ dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv);
+
+ free(message);
free(syslog_facility);
free(syslog_priority);
- free(cgroup);
+}
+
+static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
+ struct iovec *iovec = NULL;
+ unsigned n = 0, m = 0, j;
+ const char *p;
+ size_t remaining;
+
+ assert(s);
+ assert(buffer || n == 0);
+
+ p = buffer;
+ remaining = buffer_size;
+
+ while (remaining > 0) {
+ const char *e, *q;
+
+ e = memchr(p, '\n', remaining);
+
+ if (!e) {
+ /* Trailing noise, let's ignore it, and flush what we collected */
+ log_debug("Received message with trailing noise, ignoring.");
+ break;
+ }
+
+ if (e == p) {
+ /* Entry separator */
+ dispatch_message(s, iovec, n, m, ucred, tv);
+ n = 0;
+
+ p++;
+ remaining--;
+ continue;
+ }
+
+ if (*p == '.') {
+ /* Control command, ignore for now */
+ remaining -= (e - p) + 1;
+ p = e + 1;
+ continue;
+ }
+
+ /* A property follows */
+
+ if (n+13 >= m) {
+ struct iovec *c;
+ unsigned u;
+
+ u = MAX((n+13U) * 2U, 4U);
+ c = realloc(iovec, u * sizeof(struct iovec));
+ if (!c) {
+ log_error("Out of memory");
+ break;
+ }
+
+ iovec = c;
+ m = u;
+ }
+
+ q = memchr(p, '=', e - p);
+ if (q) {
+ iovec[n].iov_base = (char*) p;
+ iovec[n].iov_len = e - p;
+ n++;
+
+ remaining -= (e - p) + 1;
+ p = e + 1;
+ continue;
+ } else {
+ uint64_t l;
+ char *k;
+
+ if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
+ log_debug("Failed to parse message, ignoring.");
+ break;
+ }
+
+ memcpy(&l, e + 1, sizeof(uint64_t));
+ l = le64toh(l);
+
+ if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
+ e[1+sizeof(uint64_t)+l] != '\n') {
+ log_debug("Failed to parse message, ignoring.");
+ break;
+ }
+
+ k = malloc((e - p) + 1 + l);
+ if (!k) {
+ log_error("Out of memory");
+ break;
+ }
+
+ memcpy(k, p, e - p);
+ k[e - p] = '=';
+ memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
+
+ iovec[n].iov_base = k;
+ iovec[n].iov_len = (e - p) + 1 + l;
+ n++;
+
+ remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
+ p = e + 1 + sizeof(uint64_t) + l + 1;
+ }
+ }
+
+ dispatch_message(s, iovec, n, m, ucred, tv);
+
+ for (j = 0; j < n; j++)
+ if (iovec[j].iov_base < buffer ||
+ (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
+ free(iovec[j].iov_base);
}
static int process_event(Server *s, struct epoll_event *ev) {
@@ -309,9 +448,9 @@ static int process_event(Server *s, struct epoll_event *ev) {
}
- if (ev->data.fd == s->syslog_fd) {
+ if (ev->data.fd == s->native_fd ||
+ ev->data.fd == s->syslog_fd) {
for (;;) {
- char buf[LINE_MAX+1];
struct msghdr msghdr;
struct iovec iovec;
struct ucred *ucred = NULL;
@@ -323,11 +462,35 @@ static int process_event(Server *s, struct epoll_event *ev) {
CMSG_SPACE(sizeof(struct timeval))];
} control;
ssize_t n;
- char *e;
+ int v;
+
+ if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
+ log_error("SIOCINQ failed: %m");
+ return -errno;
+ }
+
+ if (v <= 0)
+ return 1;
+
+ if (s->buffer_size < (size_t) v) {
+ void *b;
+ size_t l;
+
+ l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
+ b = realloc(s->buffer, l+1);
+
+ if (!b) {
+ log_error("Couldn't increase buffer.");
+ return -ENOMEM;
+ }
+
+ s->buffer_size = l;
+ s->buffer = b;
+ }
zero(iovec);
- iovec.iov_base = buf;
- iovec.iov_len = sizeof(buf)-1;
+ iovec.iov_base = s->buffer;
+ iovec.iov_len = s->buffer_size;
zero(control);
zero(msghdr);
@@ -358,13 +521,18 @@ static int process_event(Server *s, struct epoll_event *ev) {
tv = (struct timeval*) CMSG_DATA(cmsg);
}
- e = memchr(buf, '\n', n);
- if (e)
- *e = 0;
- else
- buf[n] = 0;
+ if (ev->data.fd == s->syslog_fd) {
+ char *e;
- process_message(s, strstrip(buf), ucred, tv);
+ e = memchr(s->buffer, '\n', n);
+ if (e)
+ *e = 0;
+ else
+ s->buffer[n] = 0;
+
+ process_syslog_message(s, strstrip(s->buffer), ucred, tv);
+ } else
+ process_native_message(s, s->buffer, n, ucred, tv);
}
return 1;
@@ -428,51 +596,73 @@ static int system_journal_open(Server *s) {
return r;
}
-static int server_init(Server *s) {
- int n, one, r;
- struct epoll_event ev;
- sigset_t mask;
+static int open_syslog_socket(Server *s) {
+ union sockaddr_union sa;
+ int one, r;
assert(s);
- zero(*s);
- s->syslog_fd = s->signal_fd = -1;
+ if (s->syslog_fd < 0) {
- s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
- if (s->epoll_fd < 0) {
- log_error("Failed to create epoll object: %m");
- return -errno;
+ s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (s->syslog_fd < 0) {
+ log_error("socket() failed: %m");
+ return -errno;
+ }
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
+
+ unlink(sa.un.sun_path);
+
+ r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ if (r < 0) {
+ log_error("bind() failed: %m");
+ return -errno;
+ }
+
+ chmod(sa.un.sun_path, 0666);
}
- n = sd_listen_fds(true);
- if (n < 0) {
- log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
- return n;
+ one = 1;
+ r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+ if (r < 0) {
+ log_error("SO_PASSCRED failed: %m");
+ return -errno;
}
- if (n > 1) {
- log_error("Too many file descriptors passed.");
- return -EINVAL;
+ one = 1;
+ r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
+ if (r < 0) {
+ log_error("SO_TIMESTAMP failed: %m");
+ return -errno;
}
- if (n == 1)
- s->syslog_fd = SD_LISTEN_FDS_START;
- else {
- union sockaddr_union sa;
+ return 0;
+}
- s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (s->syslog_fd < 0) {
+static int open_native_socket(Server*s) {
+ union sockaddr_union sa;
+ int one, r;
+
+ assert(s);
+
+ if (s->native_fd < 0) {
+
+ s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (s->native_fd < 0) {
log_error("socket() failed: %m");
return -errno;
}
zero(sa);
sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
+ strncpy(sa.un.sun_path, "/run/systemd/journal", sizeof(sa.un.sun_path));
unlink(sa.un.sun_path);
- r = bind(s->syslog_fd, &sa.sa, sizeof(sa.un));
+ r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
if (r < 0) {
log_error("bind() failed: %m");
return -errno;
@@ -482,24 +672,90 @@ static int server_init(Server *s) {
}
one = 1;
- r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+ r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
if (r < 0) {
log_error("SO_PASSCRED failed: %m");
return -errno;
}
one = 1;
- r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
+ r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
if (r < 0) {
log_error("SO_TIMESTAMP failed: %m");
return -errno;
}
+ return 0;
+}
+
+static int server_init(Server *s) {
+ int n, r, fd;
+ struct epoll_event ev;
+ sigset_t mask;
+
+ assert(s);
+
+ zero(*s);
+ s->syslog_fd = s->native_fd = s->signal_fd = -1;
+
+ s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+ if (s->epoll_fd < 0) {
+ log_error("Failed to create epoll object: %m");
+ return -errno;
+ }
+
+ n = sd_listen_fds(true);
+ if (n < 0) {
+ log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
+ return n;
+ }
+
+ for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
+
+ if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) {
+
+ if (s->syslog_fd >= 0) {
+ log_error("Too many /dev/log sockets passed.");
+ return -EINVAL;
+ }
+
+ s->syslog_fd = fd;
+
+ } else if (sd_is_socket(fd, AF_UNIX, SOCK_DGRAM, -1) > 0) {
+
+ if (s->native_fd >= 0) {
+ log_error("Too many native sockets passed.");
+ return -EINVAL;
+ }
+
+ s->native_fd = fd;
+ } else {
+ log_error("Unknown socket passed.");
+ return -EINVAL;
+ }
+ }
+
+ r = open_syslog_socket(s);
+ if (r < 0)
+ return r;
+
zero(ev);
ev.events = EPOLLIN;
ev.data.fd = s->syslog_fd;
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) {
- log_error("Failed to add server fd to epoll object: %m");
+ log_error("Failed to add syslog server fd to epoll object: %m");
+ return -errno;
+ }
+
+ r = open_native_socket(s);
+ if (r < 0)
+ return r;
+
+ zero(ev);
+ ev.events = EPOLLIN;
+ ev.data.fd = s->native_fd;
+ if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) {
+ log_error("Failed to add native server fd to epoll object: %m");
return -errno;
}
@@ -558,6 +814,9 @@ static void server_done(Server *s) {
if (s->syslog_fd >= 0)
close_nointr_nofail(s->syslog_fd);
+
+ if (s->native_fd >= 0)
+ close_nointr_nofail(s->native_fd);
}
int main(int argc, char *argv[]) {
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 09:49:15 +0000