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libudev: enumerate - scan /sys/block/ if needed

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This commit is contained in:
Kay Sievers 2008-09-28 23:17:29 +02:00
parent 6f67f1dfb7
commit b03e89cfba
2 changed files with 35 additions and 13 deletions
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15
TODO
View File

@ -1,18 +1,17 @@
o libudev enumerate
add buses and drivers
add /sys/block/ scanning crap
use enumerate for "trigger"
#129
o use enumerate for "trigger"
o libudev queue - interface for /dev/.udev/queue/ state
use queue interface for "settle"
o relace test/sys/ with current sysfs layout
o relace test/sys/ with current sysfs layout and adapt test
#130+
o use libudev device in udev_rules.c
get rid of udevice, store rule matching state in rule iterator
o rework rules to a match-action list, instead of a rules array
o add DVB variables to kernel, and drop shell script rule
o add watershed extra
o log warning if the kernel uses CONFIG_SYSFS_DEPRECATED*=y,
which means that /sys/class/block/ does not exist, but udev
will depend on it in a future release
o log warning if /sys/block/ does, but /sys/class/block/ does not exist,
udev will depend on the non-deprecated sysfs layout in a future release
o DEVTYPE for disks is set by the kernel, they will be removed from
the default rules
o "udevadm control" commands will only accept the --<command> syntax

33
udev/lib/libudev-enumerate.c
View File

@ -89,6 +89,7 @@ static int devices_scan_subsystem(struct udev *udev,
return -1;
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char syspath[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE];
struct stat statbuf;
if (dent->d_name[0] == '.')
@ -96,9 +97,9 @@ static int devices_scan_subsystem(struct udev *udev,
util_strlcpy(syspath, path, sizeof(syspath));
util_strlcat(syspath, "/", sizeof(syspath));
util_strlcat(syspath, dent->d_name, sizeof(syspath));
if (stat(syspath, &statbuf) != 0)
continue;
if (!S_ISDIR(statbuf.st_mode))
util_strlcpy(filename, syspath, sizeof(filename));
util_strlcat(filename, "/uevent", sizeof(filename));
if (stat(filename, &statbuf) != 0)
continue;
util_resolve_sys_link(udev, syspath, sizeof(syspath));
list_entry_add(udev, devices_list, syspath, NULL, 1, 1);
@ -117,8 +118,11 @@ static int devices_scan_subsystems(struct udev *udev,
struct udev_list_entry *list_entry;
/* if list of subsystems to scan is given, just use this list */
udev_list_entry_foreach(list_entry, subsystem_include_list)
udev_list_entry_foreach(list_entry, subsystem_include_list) {
if (udev_list_entry_get_by_name(subsystem_exclude_list, udev_list_entry_get_name(list_entry)) != NULL)
continue;
devices_scan_subsystem(udev, basedir, udev_list_entry_get_name(list_entry), subdir, devices_list);
}
} else {
char path[UTIL_PATH_SIZE];
DIR *dir;
@ -213,10 +217,10 @@ struct udev_enumerate *udev_enumerate_new_from_devices(struct udev *udev, const
}
va_end(vargs);
/* if we have /sys/subsystem/, forget all the old stuff */
util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
util_strlcat(base, "/subsystem", sizeof(base));
if (stat(base, &statbuf) == 0) {
/* we have /subsystem/, forget all the old stuff */
info(udev, "searching '/subsystem/*/devices/*' dir\n");
devices_scan_subsystems(udev, "/subsystem", "/devices",
list_get_entry(&subsystem_include_list),
@ -233,6 +237,25 @@ struct udev_enumerate *udev_enumerate_new_from_devices(struct udev *udev, const
list_get_entry(&subsystem_include_list),
list_get_entry(&subsystem_exclude_list),
&udev_enumerate->devices_list);
/* if block isn't a class, scan /block/ */
util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
util_strlcat(base, "/class/block", sizeof(base));
if (stat(base, &statbuf) != 0) {
struct udev_list_entry *include_list = list_get_entry(&subsystem_include_list);
struct udev_list_entry *exclude_list = list_get_entry(&subsystem_exclude_list);
int include_block = (include_list == NULL || udev_list_entry_get_by_name(include_list, "block") != NULL);
int exclude_block = (udev_list_entry_get_by_name(exclude_list, "block") != NULL);
if (include_block && !exclude_block) {
info(udev, "searching '/block/*/*' dir\n");
/* scan disks */
devices_scan_subsystem(udev, "/block", NULL, NULL, &udev_enumerate->devices_list);
/* scan partitions */
devices_scan_subsystems(udev, "/block", NULL,
NULL, NULL,
&udev_enumerate->devices_list);
}
}
}
list_cleanup(udev, &subsystem_include_list);