Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270801AbTHAP2H (ORCPT ); Fri, 1 Aug 2003 11:28:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270807AbTHAP2H (ORCPT ); Fri, 1 Aug 2003 11:28:07 -0400 Received: from lns-th2-5f-81-56-227-145.adsl.proxad.net ([81.56.227.145]:31622 "EHLO smtp.ced-2.eu.org") by vger.kernel.org with ESMTP id S270801AbTHAP1w (ORCPT ); Fri, 1 Aug 2003 11:27:52 -0400 Message-ID: <3F2A86F5.1010804@ifrance.com> Date: Fri, 01 Aug 2003 17:27:49 +0200 From: =?ISO-8859-1?Q?C=E9dric?= User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 X-Accept-Language: fr-fr, fr, en-us, en MIME-Version: 1.0 To: linux-kernel Subject: Re: VFS: Cannot open root device "304" or hda4 References: <200308011657.15049.jorge78@inwind.it> In-Reply-To: <200308011657.15049.jorge78@inwind.it> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10865 Lines: 443 kernel_286@hotmail.com wrote: > Hi to all, this is my first post on LKML. > > I'm trying 2.6.0-test2-mm2 and the compiling process ends with no errors > except for some warnings about oss modules. > After reboot with the 2.6 I obtain a kernel panic error: > > ************************************** > VFS: Cannot open root device "304" or hda4 > Please append a correct "root=" boot option > VFS: Unable to mount root fs on hda4; > ************************************** > I've read old ML posts but the don't help me. > According to 2.4.21, the root fs is /dev/hda4: I've tried to give "root=0304" > or "root=/dev/hda4" at the 2.6, but I obtain the same errors. > I've even tried initrd with no changes. > > I've introduced some printk in init/do_mount.c (see the linked file at line > 64) and before the kernel panic, the result was : > > *************************************** > name hda4 - /sys/block/hda4/dev > descriptor -1 > > name hda - /sys/block/hda/dev > descriptor 0 > > scanning '3:0' > *************************************** > > Is it normal? > > Thanks a lot. > Mario > > PS: sorry for my 'bad' english.. I'm learning... > > > > > ------------------------------------------------------------------------ > > #include > #include > #include > #include > #include > #include > #include > > #include > #include > #include > > #include "do_mounts.h" > > extern int get_filesystem_list(char * buf); > > int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ > > int root_mountflags = MS_RDONLY | MS_VERBOSE; > char * __initdata root_device_name; > static char __initdata saved_root_name[64]; > > /* this is initialized in init/main.c */ > dev_t ROOT_DEV; > > static int __init load_ramdisk(char *str) > { > rd_doload = simple_strtol(str,NULL,0) & 3; > return 1; > } > __setup("load_ramdisk=", load_ramdisk); > > static int __init readonly(char *str) > { > if (*str) > return 0; > root_mountflags |= MS_RDONLY; > return 1; > } > > static int __init readwrite(char *str) > { > if (*str) > return 0; > root_mountflags &= ~MS_RDONLY; > return 1; > } > > __setup("ro", readonly); > __setup("rw", readwrite); > > static dev_t __init try_name(char *name, int part) > { > char path[64]; > char buf[32]; > int range; > dev_t res; > char *s; > int len; > int fd; > unsigned int maj, min; > > /* read device number from .../dev */ > > sprintf(path, "/sys/block/%s/dev", name); > printk("name %s - path %s\n",name, path); > fd = open(path, 0, 0); > printk("descriptor %d\n",fd); > if (fd < 0) > goto fail; > len = read(fd, buf, 32); > close(fd); > if (len <= 0 || len == 32 || buf[len - 1] != '\n') > goto fail; > buf[len - 1] = '\0'; > /* > * The format of dev is now %u:%u -- see print_dev_t() > */ > printk("scanning `%s'\n", buf); > if (sscanf(buf, "%u:%u", &maj, &min) == 2) > res = MKDEV(maj, min); > else > goto fail; > > /* if it's there and we are not looking for a partition - that's it */ > if (!part) > return res; > > /* otherwise read range from .../range */ > sprintf(path, "/sys/block/%s/range", name); > fd = open(path, 0, 0); > if (fd < 0) > goto fail; > len = read(fd, buf, 32); > close(fd); > if (len <= 0 || len == 32 || buf[len - 1] != '\n') > goto fail; > buf[len - 1] = '\0'; > range = simple_strtoul(buf, &s, 10); > if (*s) > goto fail; > > /* if partition is within range - we got it */ > if (part < range) > return res + part; > fail: > return (dev_t) 0; > } > > /* > * Convert a name into device number. We accept the following variants: > * > * 1) device number in hexadecimal represents itself > * 2) /dev/nfs represents Root_NFS (0xff) > * 3) /dev/ represents the device number of disk > * 4) /dev/ represents the device number > * of partition - device number of disk plus the partition number > * 5) /dev/p - same as the above, that form is > * used when disk name of partitioned disk ends on a digit. > * > * If name doesn't have fall into the categories above, we return 0. > * Driverfs is used to check if something is a disk name - it has > * all known disks under bus/block/devices. If the disk name > * contains slashes, name of driverfs node has them replaced with > * dots. try_name() does the actual checks, assuming that driverfs > * is mounted on rootfs /sys. > */ > > dev_t name_to_dev_t(char *name) > { > char s[32]; > char *p; > dev_t res = 0; > int part; > > sys_mkdir("/sys", 0700); > if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0) > goto out; > > if (strncmp(name, "/dev/", 5) != 0) { > res = (dev_t) simple_strtoul(name, &p, 16); > if (*p) > goto fail; > goto done; > } > name += 5; > res = Root_NFS; > if (strcmp(name, "nfs") == 0) > goto done; > > if (strlen(name) > 31) > goto fail; > strcpy(s, name); > for (p = s; *p; p++) > if (*p == '/') > *p = '.'; > res = try_name(s, 0); > if (res) > goto done; > > while (p > s && isdigit(p[-1])) > p--; > if (p == s || !*p || *p == '0') > goto fail; > part = simple_strtoul(p, NULL, 10); > *p = '\0'; > res = try_name(s, part); > if (res) > goto done; > > if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p') > goto fail; > p[-1] = '\0'; > res = try_name(s, part); > done: > sys_umount("/sys", 0); > out: > sys_rmdir("/sys"); > return res; > fail: > res = (dev_t) 0; > goto done; > } > > static int __init root_dev_setup(char *line) > { > strlcpy(saved_root_name, line, sizeof(saved_root_name)); > return 1; > } > > __setup("root=", root_dev_setup); > > static char * __initdata root_mount_data; > static int __init root_data_setup(char *str) > { > root_mount_data = str; > return 1; > } > > static char * __initdata root_fs_names; > static int __init fs_names_setup(char *str) > { > root_fs_names = str; > return 1; > } > > __setup("rootflags=", root_data_setup); > __setup("rootfstype=", fs_names_setup); > > static void __init get_fs_names(char *page) > { > char *s = page; > > if (root_fs_names) { > strcpy(page, root_fs_names); > while (*s++) { > if (s[-1] == ',') > s[-1] = '\0'; > } > } else { > int len = get_filesystem_list(page); > char *p, *next; > > page[len] = '\0'; > for (p = page-1; p; p = next) { > next = strchr(++p, '\n'); > if (*p++ != '\t') > continue; > while ((*s++ = *p++) != '\n') > ; > s[-1] = '\0'; > } > } > *s = '\0'; > } > > static int __init do_mount_root(char *name, char *fs, int flags, void *data) > { > int err = sys_mount(name, "/root", fs, flags, data); > if (err) > return err; > > sys_chdir("/root"); > ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev; > printk("VFS: Mounted root (%s filesystem)%s.\n", > current->fs->pwdmnt->mnt_sb->s_type->name, > current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY ? > " readonly" : ""); > return 0; > } > > void __init mount_block_root(char *name, int flags) > { > char *fs_names = __getname(); > char *p; > char b[BDEVNAME_SIZE]; > > get_fs_names(fs_names); > retry: > for (p = fs_names; *p; p += strlen(p)+1) { > int err = do_mount_root(name, p, flags, root_mount_data); > switch (err) { > case 0: > goto out; > case -EACCES: > flags |= MS_RDONLY; > goto retry; > case -EINVAL: > continue; > } > /* > * Allow the user to distinguish between failed open > * and bad superblock on root device. > */ > __bdevname(ROOT_DEV, b); > printk("VFS: Cannot open root device \"%s\" or %s\n", > root_device_name, b); > printk("Please append a correct \"root=\" boot option\n"); > panic("VFS: Unable to mount root fs on %s", b); > } > panic("VFS: Unable to mount root fs on %s", __bdevname(ROOT_DEV, b)); > out: > putname(fs_names); > } > > #ifdef CONFIG_ROOT_NFS > static int __init mount_nfs_root(void) > { > void *data = nfs_root_data(); > > create_dev("/dev/root", ROOT_DEV, NULL); > if (data && > do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0) > return 1; > return 0; > } > #endif > > #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) > void __init change_floppy(char *fmt, ...) > { > struct termios termios; > char buf[80]; > char c; > int fd; > va_list args; > va_start(args, fmt); > vsprintf(buf, fmt, args); > va_end(args); > fd = open("/dev/root", O_RDWR | O_NDELAY, 0); > if (fd >= 0) { > sys_ioctl(fd, FDEJECT, 0); > close(fd); > } > printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf); > fd = open("/dev/console", O_RDWR, 0); > if (fd >= 0) { > sys_ioctl(fd, TCGETS, (long)&termios); > termios.c_lflag &= ~ICANON; > sys_ioctl(fd, TCSETSF, (long)&termios); > read(fd, &c, 1); > termios.c_lflag |= ICANON; > sys_ioctl(fd, TCSETSF, (long)&termios); > close(fd); > } > } > #endif > > void __init mount_root(void) > { > #ifdef CONFIG_ROOT_NFS > if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { > if (mount_nfs_root()) > return; > > printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); > ROOT_DEV = Root_FD0; > } > #endif > #ifdef CONFIG_BLK_DEV_FD > if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { > /* rd_doload is 2 for a dual initrd/ramload setup */ > if (rd_doload==2) { > if (rd_load_disk(1)) { > ROOT_DEV = Root_RAM1; > root_device_name = NULL; > } > } else > change_floppy("root floppy"); > } > #endif > create_dev("/dev/root", ROOT_DEV, root_device_name); > mount_block_root("/dev/root", root_mountflags); > } > > /* > * Prepare the namespace - decide what/where to mount, load ramdisks, etc. > */ > void __init prepare_namespace(void) > { > int is_floppy; > > mount_devfs(); > > md_run_setup(); > > if (saved_root_name[0]) { > root_device_name = saved_root_name; > ROOT_DEV = name_to_dev_t(root_device_name); > if (strncmp(root_device_name, "/dev/", 5) == 0) > root_device_name += 5; > } > > is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; > > /* This has to be before mounting root, because even readonly mount of reiserfs would replay > log corrupting stuff */ > software_resume(); > > if (initrd_load()) > goto out; > > if (is_floppy && rd_doload && rd_load_disk(0)) > ROOT_DEV = Root_RAM0; > > mount_root(); > out: > umount_devfs("/dev"); > sys_mount(".", "/", NULL, MS_MOVE, NULL); > sys_chroot("."); > security_sb_post_mountroot(); > mount_devfs_fs (); > } > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/