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Logging limit enforcement moved into the rfile structure

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This commit is contained in:
Maria Matejka 2023-08-24 15:38:44 +02:00
parent d089f1b0a7
commit 3ab857f1d0
4 changed files with 35 additions and 21 deletions
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4
sysdep/unix/config.Y
View File

@ -52,7 +52,7 @@ log_file:
text log_limit {
if (!parse_and_exit)
{
this_log->rf = rf_open(new_config->pool, $1, RF_APPEND);
this_log->rf = rf_open(new_config->pool, $1, RF_APPEND, this_log->limit);
if (!this_log->rf) cf_error("Unable to open log file '%s': %m", $1);
}
this_log->filename = $1;
@ -91,7 +91,7 @@ mrtdump_base:
| MRTDUMP text ';' {
if (!parse_and_exit)
{
struct rfile *f = rf_open(new_config->pool, $2, RF_APPEND);
struct rfile *f = rf_open(new_config->pool, $2, RF_APPEND, 0);
if (!f) cf_error("Unable to open MRTDump file '%s': %m", $2);
new_config->mrtdump_file = f;
}

16
sysdep/unix/io.c
View File

@ -67,6 +67,7 @@ struct rfile {
resource r;
struct stat stat;
int fd;
off_t limit;
_Atomic off_t pos;
};
@ -126,7 +127,7 @@ rf_stat(struct rfile *r)
}
struct rfile *
rf_open(pool *p, const char *name, enum rf_mode mode)
rf_open(pool *p, const char *name, enum rf_mode mode, off_t limit)
{
int fd = rf_open_get_fd(name, mode);
@ -135,6 +136,7 @@ rf_open(pool *p, const char *name, enum rf_mode mode)
struct rfile *r = ralloc(p, &rf_class);
r->fd = fd;
r->limit = limit;
switch (mode)
{
@ -168,12 +170,20 @@ rf_same(struct rfile *a, struct rfile *b)
(a->stat.st_ino == b->stat.st_ino);
}
void
int
rf_write(struct rfile *r, const void *buf, size_t count)
{
if (r->limit && (atomic_fetch_add_explicit(&r->pos, count, memory_order_relaxed) + (off_t) count > r->limit))
{
atomic_fetch_sub_explicit(&r->pos, count, memory_order_relaxed);
return 0;
}
else
{
while ((write(r->fd, buf, count) < 0) && (errno == EINTR))
;
atomic_fetch_add_explicit(&r->pos, count, memory_order_relaxed);
return 1;
}
}

24
sysdep/unix/log.c
View File

@ -149,7 +149,7 @@ log_rotate(struct log_channel *lc)
if ((rename(lc->filename, lc->backup) < 0) && (unlink(lc->filename) < 0))
return lts_request(lc, NULL, "Log Rotate Failed");
struct rfile *rf = rf_open(log_pool, lc->filename, RF_APPEND);
struct rfile *rf = rf_open(log_pool, lc->filename, RF_APPEND, lc->limit);
if (!rf)
return lts_request(lc, NULL, "Log Rotate Failed");
@ -196,19 +196,23 @@ log_commit(log_buffer *buf)
*buf->buf.pos = '\n';
byte *begin = l->terminal ? buf->buf.start : buf->tm_pos;
off_t msg_len = buf->buf.pos - begin + 1;
if (l->limit && (rf_size(rf) + msg_len > l->limit))
{
do {
if (rf_write(rf, buf->tm_pos, msg_len))
break;
log_lock();
rf = atomic_load_explicit(&l->rf, memory_order_acquire);
if (rf_size(rf) + msg_len > l->limit)
if (rf_write(rf, buf->tm_pos, msg_len))
{
log_rotate(l);
rf = atomic_load_explicit(&l->rf, memory_order_relaxed);
}
log_unlock();
break;
}
rf_write(l->rf, buf->tm_pos, msg_len);
log_rotate(l);
log_unlock();
rf = atomic_load_explicit(&l->rf, memory_order_relaxed);
} while (!rf_write(rf, buf->tm_pos, msg_len));
}
#ifdef HAVE_SYSLOG_H
else
@ -470,7 +474,7 @@ log_switch(int initial, list *logs, const char *new_syslog_name)
rmove(l->rf, log_pool);
else if (l->filename)
{
l->rf = rf_open(log_pool, l->filename, RF_APPEND);
l->rf = rf_open(log_pool, l->filename, RF_APPEND, l->limit);
erf = l->rf ? 0 : errno;
}
log_unlock();
@ -661,7 +665,7 @@ log_init_debug(char *f)
dbg_rf = NULL;
else if (!*f)
dbg_rf = &rf_stderr;
else if (!(dbg_rf = rf_open(&root_pool, f, RF_APPEND)))
else if (!(dbg_rf = rf_open(&root_pool, f, RF_APPEND, 0)))
{
/* Cannot use die() nor log() here, logging is not yet initialized */
fprintf(stderr, "bird: Unable to open debug file %s: %s\n", f, strerror(errno));

4
sysdep/unix/unix.h
View File

@ -119,10 +119,10 @@ enum rf_mode {
RF_APPEND,
};
struct rfile *rf_open(struct pool *, const char *name, enum rf_mode mode);
struct rfile *rf_open(struct pool *, const char *name, enum rf_mode mode, off_t limit);
off_t rf_size(struct rfile *);
int rf_same(struct rfile *, struct rfile *);
void rf_write(struct rfile *, const void *, size_t);
int rf_write(struct rfile *, const void *, size_t);
extern struct rfile rf_stderr;