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[PATCH] netdev - udevdb+dev.d changes

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Here is a patch to change the netdev handling in the database and for
the dev.d/ calls. I applies on top of the udevd.patch, cause klibc has
no sysinfo().

 o netdev's are also put into our database now. I want this for the
   udevruler gui to get a list of all handled devices.
   All devices in the db are stamped with the system uptime value at
   the creation time. 'udevinfo -d' prints it.

 o the DEVPATH value is the key for udevdb, but if we rename
   a netdev, the name is replaced in the kernel, so we add
   the changed name to the db to match with the remove event.

   NOTE: The dev.d/ scripts still get the original name from the
   hotplug call. Should we replace DEVPATH with the new name too?

 o We now only add a device to the db, if we have successfully created
   the main node or successfully renamed a netdev. This is the main part
   of the patch, cause I needed to clean the retval passing trough all
   the functions used for node creation.

 o DEVNODE sounds a bit ugly for netdev's so I exported DEVNAME too.
   Can we change the name?

 o I've added a UDEV_NO_DEVD to possibly skip the script execution
   and used it in udev-test.pl.
   udevstart is the same horror now, if you have scripts with logging
   statements in dev.d/ it takes minutes to finish, can we skip the
   scripts here too?

 o The get_device_type() function is changed to be more strict, cause
   'udevinfo -a -p /block/' gets a class device for it and tries to
   print the major/minor values.

 o bugfix, the RESULT value has now a working newline removal and a test
   for this case.
This commit is contained in:
kay.sievers@vrfy.org 2004-03-31 23:12:57 -08:00 committed by Greg KH
parent e5a2989efb
commit bbbe503ec1
10 changed files with 131 additions and 103 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
dev_d.c
View File

@ -64,11 +64,20 @@ static int run_program(char *name)
void dev_d_send(struct udevice *dev, char *subsystem)
{
char dirname[256];
char devnode[NAME_SIZE];
char devname[NAME_SIZE];
strfieldcpy(devnode, udev_root);
strfieldcat(devnode, dev->name);
setenv("DEVNODE", devnode, 1);
if (udev_dev_d == 0)
return;
if (dev->type == 'b' || dev->type == 'c') {
strfieldcpy(devname, udev_root);
strfieldcat(devname, dev->name);
} else if (dev->type == 'n') {
strfieldcpy(devname, dev->name);
}
setenv("DEVNODE", devname, 1); /* FIXME: bad name for netif */
setenv("DEVNAME", devname, 1);
dbg("DEVNAME='%s'", devname);
strcpy(dirname, DEVD_DIR);
strfieldcat(dirname, dev->name);
@ -81,4 +90,3 @@ void dev_d_send(struct udevice *dev, char *subsystem)
strcpy(dirname, DEVD_DIR "default");
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
}

24
namedev.c
View File

@ -32,6 +32,9 @@
#include <time.h>
#include <sys/wait.h>
#include <sys/stat.h>
#ifndef __KLIBC__
#include <sys/sysinfo.h>
#endif
#include "libsysfs/sysfs/libsysfs.h"
#include "list.h"
@ -454,7 +457,7 @@ static int execute_program(char *path, char *value, int len)
retval = -1;
}
if (i > 0 && value[i] == '\n')
if (i > 0 && value[i-1] == '\n')
i--;
value[i] = '\0';
dbg("result is '%s'", value);
@ -776,6 +779,7 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
struct sysfs_device *sysfs_device = NULL;
struct config_device *dev;
struct perm_device *perm;
struct sysinfo info;
char *pos;
udev->mode = 0;
@ -837,22 +841,18 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
}
}
}
/* no rule was found for the net device */
if (udev->type == 'n') {
dbg("no name for net device '%s' configured", udev->kernel_name);
return -1;
}
/* no rule was found so we use the kernel name */
strfieldcpy(udev->name, udev->kernel_name);
if (udev->type == 'n')
goto done;
else
goto perms;
found:
apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
if (udev->type == 'n')
return 0;
goto done;
udev->partitions = dev->partitions;
strfieldcpy(udev->config_file, dev->config_file);
@ -863,7 +863,7 @@ found:
dev->owner,
dev->group);
done:
perms:
/* get permissions given in config file or set defaults */
perm = find_perm(udev->name);
if (perm != NULL) {
@ -879,8 +879,10 @@ done:
dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
udev->name, udev->owner, udev->group, udev->mode);
done:
/* store time of action */
udev->config_time = time(NULL);
sysinfo(&info);
udev->config_uptime = info.uptime;
return 0;
}

11
test/udev-test.pl
View File

@ -232,6 +232,15 @@ BUS="scsi", PROGRAM="/bin/echo -n special-device", RESULT="special--*", NAME="%c
BUS="scsi", PROGRAM="/bin/echo -n special-device", RESULT="special-device-", NAME="%c-3-%n"
BUS="scsi", PROGRAM="/bin/echo -n special-device", RESULT="special-devic", NAME="%c-4-%n"
BUS="scsi", PROGRAM="/bin/echo -n special-device", RESULT="special-*", NAME="%c-%n"
EOF
},
{
desc => "program result substitution (newline removal)",
subsys => "block",
devpath => "/block/sda/sda3",
exp_name => "newline_removed" ,
conf => <<EOF
BUS="scsi", PROGRAM="/bin/echo test", RESULT="test", NAME="newline_removed"
EOF
},
{
@ -580,6 +589,8 @@ EOF
$ENV{UDEV_TEST} = "yes";
$ENV{SYSFS_PATH} = $sysfs;
$ENV{UDEV_CONFIG_FILE} = $main_conf;
$ENV{UDEV_NO_SLEEP} = "yes";
$ENV{UDEV_NO_DEVD} = "yes";
sub udev {

105
udev-add.c
View File

@ -61,21 +61,20 @@
*/
static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
int retval = -ENODEV;
struct sysfs_attribute *attr = NULL;
attr = sysfs_get_classdev_attr(class_dev, "dev");
if (attr == NULL)
goto exit;
goto error;
dbg("dev='%s'", attr->value);
if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
goto exit;
goto error;
dbg("found major=%d, minor=%d", udev->major, udev->minor);
retval = 0;
exit:
return retval;
return 0;
error:
return -1;
}
static int create_path(char *file)
@ -114,28 +113,27 @@ static int make_node(char *filename, int major, int minor, unsigned int mode, ui
if (retval != 0) {
dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
filename, mode, major, minor, strerror(errno));
return retval;
goto exit;
}
dbg("chmod(%s, %#o)", filename, mode);
retval = chmod(filename, mode);
if (retval != 0) {
if (chmod(filename, mode) != 0) {
dbg("chmod(%s, %#o) failed with error '%s'",
filename, mode, strerror(errno));
return retval;
goto exit;
}
if (uid != 0 || gid != 0) {
dbg("chown(%s, %u, %u)", filename, uid, gid);
retval = chown(filename, uid, gid);
if (retval != 0) {
if (chown(filename, uid, gid) != 0) {
dbg("chown(%s, %u, %u) failed with error '%s'",
filename, uid, gid, strerror(errno));
return retval;
goto exit;
}
}
return 0;
exit:
return retval;
}
/* get the local logged in user */
@ -169,7 +167,6 @@ static void set_to_local_user(char *user)
endutent();
}
/* Used to unlink existing files to ensure that our new file/symlink is created */
static int unlink_entry(char *filename)
{
struct stat stats;
@ -193,7 +190,6 @@ static int create_node(struct udevice *dev, int fake)
char linkname[NAME_SIZE];
char linktarget[NAME_SIZE];
char partitionname[NAME_SIZE];
int retval = 0;
uid_t uid = 0;
gid_t gid = 0;
int i;
@ -259,14 +255,15 @@ static int create_node(struct udevice *dev, int fake)
if (!fake) {
unlink_entry(filename);
info("creating device node '%s'", filename);
make_node(filename, dev->major, dev->minor, dev->mode, uid, gid);
if (make_node(filename, dev->major, dev->minor, dev->mode, uid, gid) != 0)
goto error;
} else {
info("creating device node '%s', major = '%d', minor = '%d', "
"mode = '%#o', uid = '%d', gid = '%d'", filename,
dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
}
/* create partitions if requested */
/* create all_partitions if requested */
if (dev->partitions > 0) {
info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
if (!fake) {
@ -280,7 +277,7 @@ static int create_node(struct udevice *dev, int fake)
}
}
/* create symlink if requested */
/* create symlink(s) if requested */
foreach_strpart(dev->symlink, " ", pos, len) {
strfieldcpymax(linkname, pos, len+1);
strfieldcpy(filename, udev_root);
@ -312,14 +309,15 @@ static int create_node(struct udevice *dev, int fake)
dbg("symlink(%s, %s)", linktarget, filename);
if (!fake) {
retval = symlink(linktarget, filename);
if (retval != 0)
if (symlink(linktarget, filename) != 0)
dbg("symlink(%s, %s) failed with error '%s'",
linktarget, filename, strerror(errno));
}
}
return retval;
return 0;
error:
return -1;
}
static struct sysfs_class_device *get_class_dev(char *device_name)
@ -373,12 +371,16 @@ exit:
return retval;
}
static int rename_net_if(struct udevice *dev)
static int rename_net_if(struct udevice *dev, int fake)
{
int sk;
struct ifreq ifr;
int retval;
dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
if (fake)
return 0;
sk = socket(PF_INET, SOCK_DGRAM, 0);
if (sk < 0) {
dbg("error opening socket");
@ -389,7 +391,6 @@ static int rename_net_if(struct udevice *dev)
strfieldcpy(ifr.ifr_name, dev->kernel_name);
strfieldcpy(ifr.ifr_newname, dev->name);
dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
retval = ioctl(sk, SIOCSIFNAME, &ifr);
if (retval != 0)
dbg("error changing net interface name");
@ -400,16 +401,15 @@ static int rename_net_if(struct udevice *dev)
int udev_add_device(char *path, char *subsystem, int fake)
{
struct sysfs_class_device *class_dev = NULL;
struct sysfs_class_device *class_dev;
struct udevice dev;
int retval = -EINVAL;
char key[DEVPATH_SIZE];
char *pos;
int retval;
memset(&dev, 0x00, sizeof(dev));
/* for now, the block layer is the only place where block devices are */
dev.type = get_device_type(path, subsystem);
switch (dev.type) {
case 'b':
case 'c':
@ -422,12 +422,12 @@ int udev_add_device(char *path, char *subsystem, int fake)
default:
dbg("unknown device type '%c'", dev.type);
retval = -EINVAL;
return -1;
}
class_dev = get_class_dev(path);
if (class_dev == NULL)
goto exit;
return -1;
if (dev.type == 'b' || dev.type == 'c') {
retval = get_major_minor(class_dev, &dev);
@ -437,36 +437,47 @@ int udev_add_device(char *path, char *subsystem, int fake)
}
}
retval = namedev_name_device(class_dev, &dev);
if (retval != 0)
if (namedev_name_device(class_dev, &dev) != 0)
goto exit;
if (!fake && (dev.type == 'b' || dev.type == 'c')) {
retval = udevdb_add_dev(path, &dev);
if (retval != 0)
dbg("udevdb_add_dev failed, but we are going to try "
"to create the node anyway. But remove might not "
"work properly for this device.");
}
dbg("name='%s'", dev.name);
switch (dev.type) {
case 'b':
case 'c':
retval = create_node(&dev, fake);
if ((retval == 0) && (!fake))
dev_d_send(&dev, subsystem);
if (fake || retval != 0)
goto exit;
if (udevdb_add_dev(path, &dev) != 0)
dbg("udevdb_add_dev failed, but we are going to try "
"to create the node anyway. But remove might not "
"work properly for this device.");
break;
case 'n':
retval = rename_net_if(&dev);
if (retval != 0)
dbg("net device naming failed");
strfieldcpy(key, path);
if (strcmp(dev.name, dev.kernel_name) != 0) {
retval = rename_net_if(&dev, fake);
if (fake || retval != 0)
goto exit;
/* netif's are keyed with the configured name, cause
* the original kernel name sleeps with the fishes
*/
pos = strrchr(key, '/');
if (pos != NULL) {
pos[1] = '\0';
strfieldcat(key, dev.name);
}
}
if (udevdb_add_dev(key, &dev) != 0)
dbg("udevdb_add_dev failed");
break;
}
/* execute programs in dev.d/ with the name in the environment */
dev_d_send(&dev, subsystem);
exit:
if (class_dev)
sysfs_close_class_device(class_dev);
return retval;

24
udev-remove.c
View File

@ -137,36 +137,24 @@ int udev_remove_device(char *path, char *subsystem)
memset(&dev, 0x00, sizeof(dev));
dev.type = get_device_type(path, subsystem);
switch (dev.type) {
case 'b':
case 'c':
retval = udevdb_get_dev(path, &dev);
if (retval) {
if (retval != 0) {
dbg("'%s' not found in database, falling back on default name", path);
temp = strrchr(path, '/');
if (temp == NULL)
return -ENODEV;
strfieldcpy(dev.name, &temp[1]);
}
dbg("name='%s'", dev.name);
dev.type = get_device_type(path, subsystem);
dev_d_send(&dev, subsystem);
udevdb_delete_dev(path);
dev_d_send(&dev, subsystem);
if (dev.type == 'b' || dev.type == 'c')
retval = delete_node(&dev);
break;
case 'n':
else if (dev.type == 'n')
retval = 0;
break;
default:
dbg("unknown device type '%c'", dev.type);
retval = -EINVAL;
}
return retval;
}

3
udev.h
View File

@ -52,7 +52,7 @@ struct udevice {
int partitions;
int config_line;
char config_file[NAME_SIZE];
time_t config_time;
long config_uptime;
/* private data that help us in building strings */
char bus_id[SYSFS_NAME_LEN];
@ -80,5 +80,6 @@ extern char default_owner_str[OWNER_SIZE];
extern char default_group_str[GROUP_SIZE];
extern int udev_log;
extern int udev_sleep;
extern int udev_dev_d;
#endif

5
udev_config.c
View File

@ -51,6 +51,7 @@ char default_owner_str[OWNER_SIZE];
char default_group_str[GROUP_SIZE];
int udev_log;
int udev_sleep;
int udev_dev_d;
static int string_is_true(char *str)
@ -77,6 +78,10 @@ static void init_variables(void)
udev_sleep = 1;
if (getenv("UDEV_NO_SLEEP") != NULL)
udev_sleep = 0;
udev_dev_d = 1;
if (getenv("UDEV_NO_DEVD") != NULL)
udev_dev_d = 0;
}
#define set_var(_name, _var) \

1
udevdb.c
View File

@ -59,6 +59,7 @@ int udevdb_add_dev(const char *path, const struct udevice *dev)
data.dptr = (void *)dev;
data.dsize = UDEVICE_LEN;
dbg("store key '%s' for device '%s'", path, dev->name);
return tdb_store(udevdb, key, data, TDB_REPLACE);
}

3
udevinfo.c
View File

@ -108,13 +108,14 @@ static int print_record(char *path, struct udevice *dev)
{
printf("P: %s\n", path);
printf("N: %s\n", dev->name);
printf("T: %c\n", dev->type);
printf("M: %#o\n", dev->mode);
printf("S: %s\n", dev->symlink);
printf("O: %s\n", dev->owner);
printf("G: %s\n", dev->group);
printf("F: %s\n", dev->config_file);
printf("L: %i\n", dev->config_line);
printf("T: %li\n", dev->config_time);
printf("U: %li\n", dev->config_uptime);
printf("\n");
return 0;
}

14
udevruler.c
View File

@ -77,7 +77,7 @@ struct device {
char devpath[DEVPATH_SIZE];
int config_line;
char config_file[NAME_SIZE];
time_t config_time;
long config_uptime;
int added;
};
@ -106,7 +106,7 @@ static int add_record(char *path, struct udevice *udev)
strfieldcpy(dev->devpath, path);
dev->config_line = udev->config_line;
strfieldcpy(dev->config_file, udev->config_file);
dev->config_time = udev->config_time;
dev->config_uptime = udev->config_uptime;
dev->added = 0;
/* sort in lexical order */
@ -308,7 +308,7 @@ int main(int argc, char *argv[]) {
char roottext[81];
char path[NAME_SIZE];
struct device *dev;
time_t time_last;
long time_last;
int count_last;
newtInit();
@ -332,13 +332,13 @@ int main(int argc, char *argv[]) {
/* look for last discovered device */
time_last = 0;
list_for_each_entry(dev, &device_list, list)
if (dev->config_time > time_last)
time_last = dev->config_time;
if (dev->config_uptime > time_last)
time_last = dev->config_uptime;
/* skip if more than 16 recent devices */
count_last = 0;
list_for_each_entry(dev, &device_list, list) {
if (dev->config_time < time_last - 10)
if (dev->config_uptime < time_last - 10)
continue;
count_last++;
}
@ -347,7 +347,7 @@ int main(int argc, char *argv[]) {
if (count_last < 16) {
newtListboxAppendEntry(lbox, "--- last dicovered ---", NULL);
list_for_each_entry(dev, &device_list, list) {
if (dev->config_time < time_last - 10)
if (dev->config_uptime < time_last - 10)
continue;
dbg("%s %i", dev->name, dev->config_line);