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. new kernel call sysctl for generic unprivileged system operations;

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now used for printing diagnostic messages through the kernel message
   buffer. this lets processes print diagnostics without sending messages
   to tty and log directly, simplifying the message protocol a lot and
   reducing difficulties with deadlocks and other situations in which
   diagnostics are blackholed (e.g. grants don't work). this makes
   DIAGNOSTICS(_S), ASYN_DIAGNOSTICS and DIAG_REPL obsolete, although tty
   and log still accept the codes for 'old' binaries. This also simplifies
   diagnostics in several servers and drivers - only tty needs its own
   kputc() now.
 . simplifications in vfs, and some effort to get the vnode references
   right (consistent) even during shutdown. m_mounted_on is now NULL
   for root filesystems (!) (the original and new root), a less awkward
   special case than 'm_mounted_on == m_root_node'. root now has exactly
   one reference, to root, if no files are open, just like all other
   filesystems. m_driver_e is unused.
This commit is contained in:
Ben Gras
2009-01-26 17:43:59 +00:00
parent 4984a86f32
commit 3cc092ff06
38 changed files with 243 additions and 531 deletions
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2
drivers/log/Makefile
View File

@@ -16,7 +16,7 @@ LDFLAGS = -i -L../libdriver_asyn
LIBS = -ldriver -lsys
LIB_DEP = ../libdriver_asyn/libdriver.a
OBJ = log.o diag.o kputc.o
OBJ = log.o diag.o
# build local binary
all build: $(DRIVER)

2
drivers/log/diag.c
View File

@@ -134,7 +134,7 @@ PUBLIC int do_diagnostics(message *m, int safe)
}
log_append(diagbuf, i);
if(m->m_type == ASYN_DIAGNOSTICS) return EDONTREPLY;
if(m->m_type == ASYN_DIAGNOSTICS_OLD) return EDONTREPLY;
return OK;
}

34
drivers/log/kputc.c
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@@ -1,34 +0,0 @@
/* A server must occasionally print some message. It uses a simple version of
* printf() found in the system library that calls putk() to output characters.
* The LOG driver cannot use the regular putk(). Hence, it uses a special
* version of putk() that directly sends to the TTY task.
*
* Changes:
* 21 July 2005: Created (Jorrit N. Herder)
*/
#include "log.h"
/*===========================================================================*
* kputc *
*===========================================================================*/
void kputc(c)
int c;
{
/* Accumulate another character. If 0 or buffer full, print it. */
static int buf_count; /* # characters in the buffer */
static char print_buf[80]; /* output is buffered here */
message m;
if ((c == 0 && buf_count > 0) || buf_count == sizeof(print_buf)) {
m.DIAG_BUF_COUNT = buf_count;
m.DIAG_PRINT_BUF_G = print_buf;
m.m_type = DIAGNOSTICS; /* request TTY to output this buffer */
_sendrec(TTY_PROC_NR, &m); /* if it fails, we give up */
buf_count = 0; /* clear buffer for next batch */
}
if (c != 0) {
print_buf[buf_count++] = c;
}
}

6
drivers/log/log.c
View File

@@ -397,12 +397,12 @@ int safe;
* understand.
*/
switch(m_ptr->m_type) {
case DIAGNOSTICS: {
case DIAGNOSTICS_OLD: {
r = do_diagnostics(m_ptr, 0);
break;
}
case ASYN_DIAGNOSTICS:
case DIAGNOSTICS_S:
case ASYN_DIAGNOSTICS_OLD:
case DIAGNOSTICS_S_OLD:
r = do_diagnostics(m_ptr, 1);
break;
case DEV_STATUS: {

1
drivers/log/log.h
View File

@@ -31,7 +31,6 @@ struct logdevice {
};
/* Function prototypes. */
_PROTOTYPE( void kputc, (int c) );
_PROTOTYPE( int do_new_kmess, (message *m) );
_PROTOTYPE( int do_diagnostics, (message *m, int safe) );
_PROTOTYPE( void log_append, (char *buf, int len) );