From 7e720bd4ad8257d81d273d98294ebbcc03ade9ba Mon Sep 17 00:00:00 2001 From: "kay.sievers@vrfy.org" Date: Mon, 21 Feb 2005 13:44:39 +0100 Subject: [PATCH] [PATCH] switch major/minor to dev_t --- namedev.c | 13 +++++++------ udev.h | 5 ++--- udev_add.c | 43 +++++++++++++------------------------------ udev_db.c | 6 ++++-- udev_remove.c | 2 +- udev_sysfs.c | 17 +++++++++++++++++ udev_sysfs.h | 1 + 7 files changed, 45 insertions(+), 42 deletions(-) diff --git a/namedev.c b/namedev.c index 5c328594..e317cc68 100644 --- a/namedev.c +++ b/namedev.c @@ -228,12 +228,12 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, dbg("substitute kernel number '%s'", udev->kernel_number); break; case 'm': - strintcatmax(string, udev->minor, maxsize); - dbg("substitute minor number '%u'", udev->minor); + strintcatmax(string, minor(udev->devt), maxsize); + dbg("substitute minor number '%u'", minor(udev->devt)); break; case 'M': - strintcatmax(string, udev->major, maxsize); - dbg("substitute major number '%u'", udev->major); + strintcatmax(string, major(udev->devt), maxsize); + dbg("substitute major number '%u'", major(udev->devt)); break; case 'c': if (strlen(udev->program_result) == 0) @@ -317,8 +317,9 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, case 'N': if (udev->tmp_node[0] == '\0') { dbg("create temporary device node for callout"); - snprintf(udev->tmp_node, NAME_SIZE-1, "%s/.tmp-%u-%u", udev_root, udev->major, udev->minor); - udev_make_node(udev, udev->tmp_node, udev->major, udev->minor, 0600, 0, 0); + snprintf(udev->tmp_node, NAME_SIZE, "%s/.tmp-%u-%u", udev_root, major(udev->devt), minor(udev->devt)); + udev->tmp_node[NAME_SIZE] = '\0'; + udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0); } strfieldcatmax(string, udev->tmp_node, maxsize); dbg("substitute temporary device node name '%s'", udev->tmp_node); diff --git a/udev.h b/udev.h index c2f9859c..2d2ef364 100644 --- a/udev.h +++ b/udev.h @@ -58,8 +58,7 @@ struct udevice { char group[USER_SIZE]; mode_t mode; char type; - int major; - int minor; + dev_t devt; char devname[NAME_SIZE]; char tmp_node[NAME_SIZE]; @@ -79,7 +78,7 @@ extern int udev_remove_device(struct udevice *udev); extern void udev_init_config(void); extern int udev_start(void); extern void udev_multiplex_directory(struct udevice *udev, const char *basedir, const char *suffix); -extern int udev_make_node(struct udevice *udev, const char *file, int major, int minor, mode_t mode, uid_t uid, gid_t gid); +extern int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid); extern char sysfs_path[SYSFS_PATH_MAX]; extern char udev_root[PATH_MAX]; diff --git a/udev_add.c b/udev_add.c index f384ea96..66264f06 100644 --- a/udev_add.c +++ b/udev_add.c @@ -39,35 +39,15 @@ #include "libsysfs/sysfs/libsysfs.h" #include "udev.h" #include "udev_utils.h" +#include "udev_sysfs.h" #include "udev_version.h" #include "logging.h" #include "namedev.h" #include "udev_db.h" #include "udev_selinux.h" -/* - * the major/minor of a device is stored in a file called "dev" - * The number is stored in decimal values in the format: M:m - */ -static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev) -{ - struct sysfs_attribute *attr = NULL; - attr = sysfs_get_classdev_attr(class_dev, "dev"); - if (attr == NULL) - goto error; - dbg("dev='%s'", attr->value); - - if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2) - goto error; - dbg("found major=%d, minor=%d", udev->major, udev->minor); - - return 0; -error: - return -1; -} - -int udev_make_node(struct udevice *udev, const char *file, int major, int minor, mode_t mode, uid_t uid, gid_t gid) +int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid) { struct stat stats; int retval = 0; @@ -77,7 +57,7 @@ int udev_make_node(struct udevice *udev, const char *file, int major, int minor, /* preserve node with already correct numbers, to not change the inode number */ if (((stats.st_mode & S_IFMT) == S_IFBLK || (stats.st_mode & S_IFMT) == S_IFCHR) && - (stats.st_rdev == makedev(major, minor))) { + (stats.st_rdev == devt)) { dbg("preserve file '%s', cause it has correct dev_t", file); selinux_setfilecon(file, udev->kernel_name, stats.st_mode); goto perms; @@ -106,10 +86,10 @@ create: } selinux_setfscreatecon(file, udev->kernel_name, mode); - retval = mknod(file, mode, makedev(major, minor)); + retval = mknod(file, mode, devt); if (retval != 0) { dbg("mknod(%s, %#o, %u, %u) failed with error '%s'", - file, mode, major, minor, strerror(errno)); + file, mode, major(devt), minor(devt), strerror(errno)); goto exit; } @@ -185,12 +165,12 @@ static int create_node(struct udevice *udev, struct sysfs_class_device *class_de if (!udev->test_run) { info("creating device node '%s'", filename); - if (udev_make_node(udev, filename, udev->major, udev->minor, udev->mode, uid, gid) != 0) + if (udev_make_node(udev, filename, udev->devt, udev->mode, uid, gid) != 0) goto error; } else { info("creating device node '%s', major = '%d', minor = '%d', " "mode = '%#o', uid = '%d', gid = '%d'", filename, - udev->major, udev->minor, udev->mode, uid, gid); + major(udev->devt), minor(udev->devt), udev->mode, uid, gid); } /* create all_partitions if requested */ @@ -208,9 +188,12 @@ static int create_node(struct udevice *udev, struct sysfs_class_device *class_de info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions); if (!udev->test_run) { for (i = 1; i <= udev->partitions; i++) { + dev_t part_devt; + strfieldcpy(partitionname, filename); strintcat(partitionname, i); - udev_make_node(udev, partitionname, udev->major, udev->minor + i, udev->mode, uid, gid); + part_devt = makedev(major(udev->devt), minor(udev->devt)+1); + udev_make_node(udev, partitionname, part_devt, udev->mode, uid, gid); } } } @@ -295,8 +278,8 @@ int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev) int retval = 0; if (udev->type == 'b' || udev->type == 'c') { - retval = get_major_minor(class_dev, udev); - if (retval != 0) { + udev->devt = get_devt(class_dev); + if (!udev->devt) { dbg("no dev-file found, do nothing"); return 0; } diff --git a/udev_db.c b/udev_db.c index 0be7620a..b9c50443 100644 --- a/udev_db.c +++ b/udev_db.c @@ -79,7 +79,7 @@ int udev_db_add_device(struct udevice *udev) fprintf(f, "P:%s\n", udev->devpath); fprintf(f, "N:%s\n", udev->name); fprintf(f, "S:%s\n", udev->symlink); - fprintf(f, "M:%u:%u\n", udev->major, udev->minor); + fprintf(f, "M:%u:%u\n", major(udev->devt), minor(udev->devt)); fprintf(f, "A:%u\n", udev->partitions); fprintf(f, "R:%u\n", udev->ignore_remove); @@ -92,6 +92,7 @@ static int parse_db_file(struct udevice *udev, const char *filename) { char line[NAME_SIZE]; char temp[NAME_SIZE]; + unsigned int major, minor; char *bufline; char *buf; size_t bufsize; @@ -127,7 +128,8 @@ static int parse_db_file(struct udevice *udev, const char *filename) count = NAME_SIZE-1; strncpy(temp, &bufline[2], count-2); temp[count-2] = '\0'; - sscanf(temp, "%u:%u", &udev->major, &udev->minor); + sscanf(temp, "%u:%u", &major, &minor); + udev->devt = makedev(major, minor); break; case 'S': if (count > NAME_SIZE) diff --git a/udev_remove.c b/udev_remove.c index baafdea5..3a3db737 100644 --- a/udev_remove.c +++ b/udev_remove.c @@ -85,7 +85,7 @@ static int delete_node(struct udevice *udev) if (stat(filename, &stats) != 0) return -1; - if (udev->major && stats.st_rdev != makedev(udev->major, udev->minor)) { + if (udev->devt && stats.st_rdev != udev->devt) { info("device node '%s' points to a different device, skip removal", filename); return -1; } diff --git a/udev_sysfs.c b/udev_sysfs.c index fd7330a1..f0666509 100644 --- a/udev_sysfs.c +++ b/udev_sysfs.c @@ -59,6 +59,23 @@ static const struct subsystem_file { { NULL, NULL } }; +dev_t get_devt(struct sysfs_class_device *class_dev) +{ + struct sysfs_attribute *attr = NULL; + unsigned int major, minor; + + attr = sysfs_get_classdev_attr(class_dev, "dev"); + if (attr == NULL) + return 0; + dbg("dev='%s'", attr->value); + + if (sscanf(attr->value, "%u:%u", &major, &minor) != 2) + return 0; + dbg("found major=%d, minor=%d", major, minor); + + return makedev(major, minor); +} + int subsystem_expect_no_dev(const char *subsystem) { const struct subsystem_file *file; diff --git a/udev_sysfs.h b/udev_sysfs.h index 98ff53e1..77c0e6a8 100644 --- a/udev_sysfs.h +++ b/udev_sysfs.h @@ -27,6 +27,7 @@ #define WAIT_MAX_SECONDS 5 #define WAIT_LOOP_PER_SECOND 20 +extern dev_t get_devt(struct sysfs_class_device *class_dev); extern int subsystem_expect_no_dev(const char *subsystem); /* /sys/class /sys/block devices */ -- 2.39.5