master_ops.c revision 8e56767d5805b843712c67bce2d732cc722f154b
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/kobj.h>
#include <sys/kobj_lex.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#define masterfile "/boot/solaris/devicedb/master"
/* Maximum size of a master line */
#define MASTER_LINE_MAX (1024*2)
static char *one_master_line;
static int one_master_line_cur_index = 0, one_master_line_max = 0;
struct master_line {
char *column[10];
char *text; /* to be kmem alloc'd */
int line_size;
struct master_line *next, *prev;
};
static struct master_line *incore_master_head = NULL,
*incore_master_tail = NULL;
/* same order as columns in /boot/solaris/devicedb/master */
static int mf_column = 0;
static int incore_master_table_line_count = 0;
#define MASTER_OPS_DEBUG_PRINT_INCORE 0x0001
#define MASTER_OPS_DEBUG_PROCESS 0x0002
#define MASTER_OPS_DEBUG_LOOKUP 0x0004
#define MASTER_OPS_DEBUG_CID_FOUND 0x2000
static long master_ops_debug = 0x0;
#define EOL 0xA
#define FILE_T struct _buf
static void
print_incore_master_table() {
struct master_line *ptr = incore_master_head;
int i;
if (master_ops_debug & MASTER_OPS_DEBUG_PRINT_INCORE) {
for (i = 0; i < incore_master_table_line_count; i++) {
printf("1)%s, 2)%s, 3)%s, 4)%s, 5)%s, 6)%s, ",
ptr->column[0],
ptr->column[1],
ptr->column[2],
ptr->column[3],
ptr->column[4],
ptr->column[5]);
if (ptr->column[6] != NULL) {
printf("7)%s, ", ptr->column[6]);
}
if (ptr->column[7] != NULL) {
printf("8)%s", ptr->column[7]);
}
printf("\n");
ptr = ptr->next;
if (ptr == NULL) {
i++;
break;
}
}
printf("There are %d lines\n", i);
}
}
/*
* parses one_master_line[] from index pointed by one_master_line_cur_index
* returns the following tokens
* POUND -- if a comment line
* NEWLINE -- if an empty line
* NAME -- return a string from one_master_line separated by " or blank
* EOL -- End of line
*/
static int
master_lex(char *val) {
char *cp;
int ch;
int token;
cp = val;
/* skip leading blanks */
while (((ch = one_master_line[one_master_line_cur_index++]) == ' ' ||
(ch == '\t')) && (one_master_line_cur_index < one_master_line_max))
;
if ((ch == 0) || (one_master_line_cur_index >= one_master_line_max)) {
val = 0;
return (EOL);
}
*cp++ = (char)ch;
switch (ch) {
case '#':
token = POUND;
break;
case '\n':
case '\r':
token = NEWLINE;
break;
case '"':
cp--;
while (((ch = one_master_line[one_master_line_cur_index++])
!= '"') && (one_master_line_cur_index <=
one_master_line_max)) {
*cp++ = (char)ch;
}
token = NAME;
break;
default:
ch = one_master_line[one_master_line_cur_index++];
while ((ch != ' ') && (ch != '\t') && (ch != '\n') &&
(ch != '\r') && (one_master_line_cur_index <=
one_master_line_max)) {
*cp++ = (char)ch;
ch = one_master_line[one_master_line_cur_index++];
}
token = NAME;
break;
}
*cp = '\0';
return (token);
}
/*
* read a line from devicedb/master file and put it to one_master_line[] buffer
* one_master_line_max -- size of data in one_master_line[]
* one_master_line_cur_index -- reset to zero
*/
static int
master_get_a_line(FILE_T *file) {
int ch;
one_master_line_max = 0;
one_master_line_cur_index = 0; /* used by master_lex() */
while (((ch = kobj_getc(file)) != '\n') && (ch != '\r')) {
if (ch == -1) {
if (one_master_line_max == 0) {
one_master_line[0] = 0;
return (EOF);
} else {
return (one_master_line_max);
}
}
one_master_line[one_master_line_max++] = ch;
if (one_master_line_max >= MASTER_LINE_MAX) {
cmn_err(CE_WARN, "!master file line too long:");
cmn_err(CE_CONT, "%s", one_master_line);
}
}
one_master_line[one_master_line_max] = 0;
return (one_master_line_max);
}
/*
* skip a line
*/
static void
master_skip(FILE_T *file) {
char ch;
while (((ch = kobj_getc(file)) != '\n') && (ch != '\r'))
;
}
/*
* return NULL if no bar found
* if bar found, return pointer after the bar
* plus, change character '|' (bar) to null as a delimiter
*/
static char *
find_bar(char *target) {
if (target == NULL) {
return (NULL);
}
while ((*target != '|') && (*target != ' ') && (*target != 0)) {
target++;
}
if (*target == '|') {
*target = 0;
return (++target);
}
return (NULL);
}
/*
* If column 0 has | (bars) as device separators, we need make (dup)
* more lines for each device.
*/
static void
dup_devices() {
struct master_line *last, *ptr = incore_master_tail;
char *token;
int i;
if (ptr == NULL || ptr->column == NULL || ptr->column[0] == NULL) {
return;
}
token = incore_master_tail->column[0];
while ((token = find_bar(token)) != NULL) {
last = (struct master_line *)kmem_zalloc(
sizeof (struct master_line), KM_SLEEP);
for (i = 0; i < 10; i++) {
last->column[i] = ptr->column[i];
}
last->text = ptr->text;
last->line_size = 0; /* 'cause we re-use the same line */
last->column[0] = token;
ptr->next = last;
last->prev = ptr;
last->next = NULL;
ptr = incore_master_tail = last;
incore_master_table_line_count++;
}
}
/*
* sets master_ops_debug flag from propertyu passed by the boot
*/
static void
set_master_ops_debug_flags()
{
char *prop;
long flags;
if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
DDI_PROP_DONTPASS, "master_ops_debug", &prop) == DDI_PROP_SUCCESS) {
long data;
if (ddi_strtol(prop, NULL, 0, &data) == 0) {
master_ops_debug = (unsigned long)data;
e_ddi_prop_remove(DDI_DEV_T_NONE, ddi_root_node(),
"master_ops_debug");
e_ddi_prop_update_int(DDI_MAJOR_T_UNKNOWN,
ddi_root_node(), "master_ops_debug", data);
}
ddi_prop_free(prop);
}
}
/*
* open / read / parse / close devicedb/master file
*/
void
process_master_file() {
FILE_T *file;
char tokbuf[MASTER_LINE_MAX];
int token;
int done = 0;
int line_begin;
int x = 0;
int total_line_processed = 0;
set_master_ops_debug_flags();
incore_master_head = incore_master_tail = NULL;
if ((file = kobj_open_file(masterfile)) == (struct _buf *)-1) {
cmn_err(CE_WARN, "!cannot open master file: %s", masterfile);
return;
}
one_master_line = (char *)kmem_zalloc(MASTER_LINE_MAX, KM_SLEEP);
master_skip(file); /* skip the first line which is "version" */
mf_column = 0;
while (!done) {
if (mf_column == 0) {
x = master_get_a_line(file);
total_line_processed++;
if (x == EOF) { /* end of file */
done = 1;
continue;
}
if (x == 0) { /* blank line */
continue;
}
}
token = master_lex(tokbuf);
switch (token) {
case POUND: /* ignore comment line */
if (master_ops_debug & MASTER_OPS_DEBUG_PROCESS) {
printf("master_ops: # found skip this line\n");
}
mf_column = 0;
break;
case NAME: /* found actual string, parse and keep it */
if (mf_column == 0) {
if (incore_master_tail == NULL) {
/* very 1st line */
incore_master_head =
incore_master_tail = (struct
master_line *) kmem_zalloc(
sizeof (struct master_line),
KM_SLEEP);
incore_master_head->text = (char *)
kmem_zalloc(one_master_line_max,
KM_SLEEP);
incore_master_head->line_size =
one_master_line_max;
} else {
incore_master_tail->next = (struct
master_line *)kmem_zalloc(
sizeof (struct master_line),
KM_SLEEP);
incore_master_tail =
incore_master_tail->next;
incore_master_tail->text = (char *)
kmem_zalloc(one_master_line_max,
KM_SLEEP);
incore_master_tail->line_size =
one_master_line_max;
}
line_begin = 0;
incore_master_table_line_count++;
}
if ((line_begin + strlen(tokbuf) + 1) >
MASTER_LINE_MAX) {
mf_column = 0;
cmn_err(CE_WARN, "!master file line too long");
cmn_err(CE_CONT, "line data: \"%s\"",
one_master_line);
master_skip(file); /* skip this line */
break;
}
(void) strcpy(incore_master_tail->text + line_begin,
tokbuf);
incore_master_tail->column[mf_column] = line_begin +
incore_master_tail->text;
if (master_ops_debug & MASTER_OPS_DEBUG_PROCESS) {
printf("master_ops: line=%d column[%x] found:"\
" \"%s\"\n",
incore_master_table_line_count, mf_column,
incore_master_tail->column[mf_column]);
}
line_begin += strlen(tokbuf) + 1;
mf_column++;
break;
case EOF: /* end of file */
if (master_ops_debug & MASTER_OPS_DEBUG_PROCESS) {
printf("master_ops: EOF found. We're done.\n");
}
done = 1;
break;
case EOL: /* end of line */
if (master_ops_debug & MASTER_OPS_DEBUG_PROCESS) {
printf("master_ops: EOL found.\n");
}
mf_column = 0;
one_master_line_max = 0;
dup_devices();
break;
default: /* something went wrong */
cmn_err(CE_WARN, "!master_ops: something went wrong "\
"parsing master file: %s", tokbuf);
}
}
kobj_close_file(file);
if (master_ops_debug & MASTER_OPS_DEBUG_PROCESS) {
printf("master_ops: incore line count: %d\n",
incore_master_table_line_count);
printf("master_ops: total line processed: %d\n",
total_line_processed);
}
print_incore_master_table();
}
/*
* Loop and free all per line master data, including line text
*/
void
free_master_data() {
int i;
struct master_line *next, *cur = incore_master_head;
for (i = 0; i < incore_master_table_line_count; i++) {
next = cur->next;
if ((cur->text != NULL) && (cur->line_size != 0)) {
kmem_free(cur->text, cur->line_size);
}
kmem_free(cur, sizeof (struct master_line));
if (next == NULL) {
break; /* we're done */
}
cur = next;
}
incore_master_head = incore_master_tail = NULL;
if (one_master_line) {
kmem_free(one_master_line, MASTER_LINE_MAX);
}
}
/*
* To match pnpid with master table entries
* returns 0 if no matching device found in master file
* 1 if a matching device is in master file
* devname -- device node name
* description -- device description string
* properties -- device attributes (e.g. compatibility="kb8042")
* (could be NULL)
*/
int
master_file_lookup(char *pnpid, char **devname, char **description,
char **properties)
{
struct master_line *cur = incore_master_head;
/*
* Caller will pass us a null pointer if _CID not present
*/
if (pnpid == NULL)
return (0);
if (master_ops_debug & MASTER_OPS_DEBUG_LOOKUP) {
printf("master_ops: Looking for %s: ", pnpid);
}
while (cur != NULL) {
if (strcmp(pnpid, cur->column[0]) == 0) {
*devname = kmem_zalloc(strlen(cur->column[1]) + 1,
KM_SLEEP);
(void) strcpy(*devname, cur->column[1]);
*description = kmem_zalloc(strlen(cur->column[5]) + 1,
KM_SLEEP);
(void) strcpy(*description, cur->column[5]);
if (cur->column[6] != NULL) {
*properties = kmem_zalloc(
strlen(cur->column[6]) + 1, KM_SLEEP);
(void) strcpy(*properties, cur->column[6]);
} else
*properties = NULL;
if (master_ops_debug & MASTER_OPS_DEBUG_LOOKUP) {
printf("FOUND. dev node name: \"%s\"\n",
*devname);
printf("description: \"%s\"", *description);
if (*properties != NULL) {
printf(" properties: \"%s\"\n",
*properties);
} else {
printf("\n");
}
}
return (1);
}
cur = cur->next;
}
/* XXX: for the devices not found, they should go to used resources?? */
if (master_ops_debug & MASTER_OPS_DEBUG_LOOKUP) {
printf("NOT FOUND!!!\n");
}
return (0);
}
/*
* master_file_lookups() -- processes multiple pnp IDs (CIDs)
* return 1 if a PNP id is matched
* else return 0
*/
int
master_file_lookups(char *pnpid, char **devname, char **description,
char **properties, int pnpid_size)
{
char *tmp = pnpid;
if (tmp == NULL) {
return (0);
}
while ((*tmp != NULL) && (tmp <= pnpid + pnpid_size)) {
int ret = master_file_lookup(tmp, devname, description,
properties);
if (ret == 1) {
if (master_ops_debug & MASTER_OPS_DEBUG_CID_FOUND) {
cmn_err(CE_NOTE, "CID found: %s", tmp);
}
return (ret); /* a CID is found */
}
tmp += strlen(tmp) + 1; /* move on to the next one */
}
return (0);
}