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Allowed printing diagnostic messages (either from system processes or the

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kernel) to the log driver. The log driver forwards such output to the TTY.

Changed driver_task() not to send a reply if the return value is EDONTREPLY.
This commit is contained in:
Jorrit Herder
2005-07-21 18:29:52 +00:00
parent da9b8e45f9
commit 09830fc33e
6 changed files with 227 additions and 43 deletions
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drivers/log/log.c
+25 -37
View File
@@ -2,45 +2,26 @@
* /dev/klog - system log device
*
* Changes:
* 7 july 2005 - Created (Ben Gras)
* 21 July 2005 - Support for diagnostic messages (Jorrit N. Herder)
* 7 July 2005 - Created (Ben Gras)
*/
#include "../drivers.h"
#include "../libdriver/driver.h"
#include "log.h"
#include <sys/time.h>
#include <sys/select.h>
#include "../../kernel/const.h"
#include "../../kernel/type.h"
#include <sys/time.h>
#include <sys/select.h>
#define NR_DEVS 1 /* number of minor devices */
#define KRANDOM_PERIOD 10 /* ticks between krandom calls */
#define LOG_DEBUG 0
#define LOG_DEBUG 0 /* enable/ disable debugging */
#define NR_DEVS 1 /* number of minor devices */
#define MINOR_KLOG 0 /* /dev/klog */
#define LOG_SIZE (5*1024)
#define LOGINC(n, i) do { (n) = (((n) + (i)) % LOG_SIZE); } while(0)
#define SUSPENDABLE 1
PRIVATE struct logdevice {
char log_buffer[LOG_SIZE];
int log_size, /* no. of bytes in log buffer */
log_read, /* read mark */
log_write; /* write mark */
#if SUSPENDABLE
int log_proc_nr,
log_source,
log_iosize; /* proc that is blocking on read */
vir_bytes log_user_vir;
#endif
int log_selected, log_select_proc;
} logdevices[NR_DEVS];
PRIVATE struct device log_geom[NR_DEVS]; /* base and size of each device */
PRIVATE int log_device = -1; /* current device */
PUBLIC struct logdevice logdevices[NR_DEVS];
PRIVATE struct device log_geom[NR_DEVS]; /* base and size of devices */
PRIVATE int log_device = -1; /* current device */
FORWARD _PROTOTYPE( char *log_name, (void) );
FORWARD _PROTOTYPE( struct device *log_prepare, (int device) );
@@ -376,15 +357,22 @@ message *m_ptr;
* understand.
*/
switch(m_ptr->m_type) {
case DIAGNOSTICS:
r = subwrite(&logdevices[0], m_ptr->DIAG_BUF_COUNT,
m_ptr->m_source, (vir_bytes) m_ptr->DIAG_PRINT_BUF);
break;
default:
r = EINVAL;
break;
case DIAGNOSTICS: {
r = do_diagnostics(m_ptr);
break;
}
case SYS_EVENT: {
sigset_t sigset = m_ptr->NOTIFY_ARG;
if (sigismember(&sigset, SIGKMESS)) {
do_new_kmess(m_ptr);
}
r = EDONTREPLY;
break;
}
default:
r = EINVAL;
break;
}
return r;
}