diff options
Diffstat (limited to 'fs/partitions/check.c')
| -rw-r--r-- | fs/partitions/check.c | 539 |
1 files changed, 0 insertions, 539 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c deleted file mode 100644 index 03f808c5b79..00000000000 --- a/fs/partitions/check.c +++ /dev/null @@ -1,539 +0,0 @@ -/* - * fs/partitions/check.c - * - * Code extracted from drivers/block/genhd.c - * Copyright (C) 1991-1998 Linus Torvalds - * Re-organised Feb 1998 Russell King - * - * We now have independent partition support from the - * block drivers, which allows all the partition code to - * be grouped in one location, and it to be mostly self - * contained. - * - * Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl} - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/fs.h> -#include <linux/kmod.h> -#include <linux/ctype.h> -#include <linux/genhd.h> - -#include "check.h" - -#include "acorn.h" -#include "amiga.h" -#include "atari.h" -#include "ldm.h" -#include "mac.h" -#include "msdos.h" -#include "osf.h" -#include "sgi.h" -#include "sun.h" -#include "ibm.h" -#include "ultrix.h" -#include "efi.h" -#include "karma.h" -#include "sysv68.h" - -#ifdef CONFIG_BLK_DEV_MD -extern void md_autodetect_dev(dev_t dev); -#endif - -int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/ - -static int (*check_part[])(struct parsed_partitions *, struct block_device *) = { - /* - * Probe partition formats with tables at disk address 0 - * that also have an ADFS boot block at 0xdc0. - */ -#ifdef CONFIG_ACORN_PARTITION_ICS - adfspart_check_ICS, -#endif -#ifdef CONFIG_ACORN_PARTITION_POWERTEC - adfspart_check_POWERTEC, -#endif -#ifdef CONFIG_ACORN_PARTITION_EESOX - adfspart_check_EESOX, -#endif - - /* - * Now move on to formats that only have partition info at - * disk address 0xdc0. Since these may also have stale - * PC/BIOS partition tables, they need to come before - * the msdos entry. - */ -#ifdef CONFIG_ACORN_PARTITION_CUMANA - adfspart_check_CUMANA, -#endif -#ifdef CONFIG_ACORN_PARTITION_ADFS - adfspart_check_ADFS, -#endif - -#ifdef CONFIG_EFI_PARTITION - efi_partition, /* this must come before msdos */ -#endif -#ifdef CONFIG_SGI_PARTITION - sgi_partition, -#endif -#ifdef CONFIG_LDM_PARTITION - ldm_partition, /* this must come before msdos */ -#endif -#ifdef CONFIG_MSDOS_PARTITION - msdos_partition, -#endif -#ifdef CONFIG_OSF_PARTITION - osf_partition, -#endif -#ifdef CONFIG_SUN_PARTITION - sun_partition, -#endif -#ifdef CONFIG_AMIGA_PARTITION - amiga_partition, -#endif -#ifdef CONFIG_ATARI_PARTITION - atari_partition, -#endif -#ifdef CONFIG_MAC_PARTITION - mac_partition, -#endif -#ifdef CONFIG_ULTRIX_PARTITION - ultrix_partition, -#endif -#ifdef CONFIG_IBM_PARTITION - ibm_partition, -#endif -#ifdef CONFIG_KARMA_PARTITION - karma_partition, -#endif -#ifdef CONFIG_SYSV68_PARTITION - sysv68_partition, -#endif - NULL -}; - -/* - * disk_name() is used by partition check code and the genhd driver. - * It formats the devicename of the indicated disk into - * the supplied buffer (of size at least 32), and returns - * a pointer to that same buffer (for convenience). - */ - -char *disk_name(struct gendisk *hd, int part, char *buf) -{ - if (!part) - snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); - else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) - snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, part); - else - snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, part); - - return buf; -} - -const char *bdevname(struct block_device *bdev, char *buf) -{ - int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; - return disk_name(bdev->bd_disk, part, buf); -} - -EXPORT_SYMBOL(bdevname); - -/* - * There's very little reason to use this, you should really - * have a struct block_device just about everywhere and use - * bdevname() instead. - */ -const char *__bdevname(dev_t dev, char *buffer) -{ - scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)", - MAJOR(dev), MINOR(dev)); - return buffer; -} - -EXPORT_SYMBOL(__bdevname); - -static struct parsed_partitions * -check_partition(struct gendisk *hd, struct block_device *bdev) -{ - struct parsed_partitions *state; - int i, res, err; - - state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL); - if (!state) - return NULL; - - disk_name(hd, 0, state->name); - printk(KERN_INFO " %s:", state->name); - if (isdigit(state->name[strlen(state->name)-1])) - sprintf(state->name, "p"); - - state->limit = hd->minors; - i = res = err = 0; - while (!res && check_part[i]) { - memset(&state->parts, 0, sizeof(state->parts)); - res = check_part[i++](state, bdev); - if (res < 0) { - /* We have hit an I/O error which we don't report now. - * But record it, and let the others do their job. - */ - err = res; - res = 0; - } - - } - if (res > 0) - return state; - if (err) - /* The partition is unrecognized. So report I/O errors if there were any */ - res = err; - if (!res) - printk(" unknown partition table\n"); - else if (warn_no_part) - printk(" unable to read partition table\n"); - kfree(state); - return ERR_PTR(res); -} - -static ssize_t part_start_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct hd_struct *p = dev_to_part(dev); - - return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect); -} - -static ssize_t part_size_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct hd_struct *p = dev_to_part(dev); - return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects); -} - -static ssize_t part_stat_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct hd_struct *p = dev_to_part(dev); - - preempt_disable(); - part_round_stats(p); - preempt_enable(); - return sprintf(buf, - "%8lu %8lu %8llu %8u " - "%8lu %8lu %8llu %8u " - "%8u %8u %8u" - "\n", - part_stat_read(p, ios[READ]), - part_stat_read(p, merges[READ]), - (unsigned long long)part_stat_read(p, sectors[READ]), - jiffies_to_msecs(part_stat_read(p, ticks[READ])), - part_stat_read(p, ios[WRITE]), - part_stat_read(p, merges[WRITE]), - (unsigned long long)part_stat_read(p, sectors[WRITE]), - jiffies_to_msecs(part_stat_read(p, ticks[WRITE])), - p->in_flight, - jiffies_to_msecs(part_stat_read(p, io_ticks)), - jiffies_to_msecs(part_stat_read(p, time_in_queue))); -} - -#ifdef CONFIG_FAIL_MAKE_REQUEST -static ssize_t part_fail_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct hd_struct *p = dev_to_part(dev); - - return sprintf(buf, "%d\n", p->make_it_fail); -} - -static ssize_t part_fail_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct hd_struct *p = dev_to_part(dev); - int i; - - if (count > 0 && sscanf(buf, "%d", &i) > 0) - p->make_it_fail = (i == 0) ? 0 : 1; - - return count; -} -#endif - -static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL); -static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL); -static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL); -#ifdef CONFIG_FAIL_MAKE_REQUEST -static struct device_attribute dev_attr_fail = - __ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store); -#endif - -static struct attribute *part_attrs[] = { - &dev_attr_start.attr, - &dev_attr_size.attr, - &dev_attr_stat.attr, -#ifdef CONFIG_FAIL_MAKE_REQUEST - &dev_attr_fail.attr, -#endif - NULL -}; - -static struct attribute_group part_attr_group = { - .attrs = part_attrs, -}; - -static struct attribute_group *part_attr_groups[] = { - &part_attr_group, - NULL -}; - -static void part_release(struct device *dev) -{ - struct hd_struct *p = dev_to_part(dev); - free_part_stats(p); - kfree(p); -} - -struct device_type part_type = { - .name = "partition", - .groups = part_attr_groups, - .release = part_release, -}; - -static inline void partition_sysfs_add_subdir(struct hd_struct *p) -{ - struct kobject *k; - - k = kobject_get(&p->dev.kobj); - p->holder_dir = kobject_create_and_add("holders", k); - kobject_put(k); -} - -static inline void disk_sysfs_add_subdirs(struct gendisk *disk) -{ - struct kobject *k; - - k = kobject_get(&disk->dev.kobj); - disk->holder_dir = kobject_create_and_add("holders", k); - disk->slave_dir = kobject_create_and_add("slaves", k); - kobject_put(k); -} - -void delete_partition(struct gendisk *disk, int part) -{ - struct hd_struct *p = disk->part[part-1]; - - if (!p) - return; - if (!p->nr_sects) - return; - disk->part[part-1] = NULL; - p->start_sect = 0; - p->nr_sects = 0; - part_stat_set_all(p, 0); - kobject_put(p->holder_dir); - device_del(&p->dev); - put_device(&p->dev); -} - -static ssize_t whole_disk_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return 0; -} -static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH, - whole_disk_show, NULL); - -void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags) -{ - struct hd_struct *p; - int err; - - p = kzalloc(sizeof(*p), GFP_KERNEL); - if (!p) - return; - - if (!init_part_stats(p)) { - kfree(p); - return; - } - p->start_sect = start; - p->nr_sects = len; - p->partno = part; - p->policy = disk->policy; - - if (isdigit(disk->dev.bus_id[strlen(disk->dev.bus_id)-1])) - snprintf(p->dev.bus_id, BUS_ID_SIZE, - "%sp%d", disk->dev.bus_id, part); - else - snprintf(p->dev.bus_id, BUS_ID_SIZE, - "%s%d", disk->dev.bus_id, part); - - device_initialize(&p->dev); - p->dev.devt = MKDEV(disk->major, disk->first_minor + part); - p->dev.class = &block_class; - p->dev.type = &part_type; - p->dev.parent = &disk->dev; - disk->part[part-1] = p; - - /* delay uevent until 'holders' subdir is created */ - p->dev.uevent_suppress = 1; - device_add(&p->dev); - partition_sysfs_add_subdir(p); - p->dev.uevent_suppress = 0; - if (flags & ADDPART_FLAG_WHOLEDISK) - err = device_create_file(&p->dev, &dev_attr_whole_disk); - - /* suppress uevent if the disk supresses it */ - if (!disk->dev.uevent_suppress) - kobject_uevent(&p->dev.kobj, KOBJ_ADD); -} - -/* Not exported, helper to add_disk(). */ -void register_disk(struct gendisk *disk) -{ - struct block_device *bdev; - char *s; - int i; - struct hd_struct *p; - int err; - - disk->dev.parent = disk->driverfs_dev; - disk->dev.devt = MKDEV(disk->major, disk->first_minor); - - strlcpy(disk->dev.bus_id, disk->disk_name, KOBJ_NAME_LEN); - /* ewww... some of these buggers have / in the name... */ - s = strchr(disk->dev.bus_id, '/'); - if (s) - *s = '!'; - - /* delay uevents, until we scanned partition table */ - disk->dev.uevent_suppress = 1; - - if (device_add(&disk->dev)) - return; -#ifndef CONFIG_SYSFS_DEPRECATED - err = sysfs_create_link(block_depr, &disk->dev.kobj, - kobject_name(&disk->dev.kobj)); - if (err) { - device_del(&disk->dev); - return; - } -#endif - disk_sysfs_add_subdirs(disk); - - /* No minors to use for partitions */ - if (disk->minors == 1) - goto exit; - - /* No such device (e.g., media were just removed) */ - if (!get_capacity(disk)) - goto exit; - - bdev = bdget_disk(disk, 0); - if (!bdev) - goto exit; - - bdev->bd_invalidated = 1; - err = blkdev_get(bdev, FMODE_READ, 0); - if (err < 0) - goto exit; - blkdev_put(bdev); - -exit: - /* announce disk after possible partitions are created */ - disk->dev.uevent_suppress = 0; - kobject_uevent(&disk->dev.kobj, KOBJ_ADD); - - /* announce possible partitions */ - for (i = 1; i < disk->minors; i++) { - p = disk->part[i-1]; - if (!p || !p->nr_sects) - continue; - kobject_uevent(&p->dev.kobj, KOBJ_ADD); - } -} - -int rescan_partitions(struct gendisk *disk, struct block_device *bdev) -{ - struct parsed_partitions *state; - int p, res; - - if (bdev->bd_part_count) - return -EBUSY; - res = invalidate_partition(disk, 0); - if (res) - return res; - bdev->bd_invalidated = 0; - for (p = 1; p < disk->minors; p++) - delete_partition(disk, p); - if (disk->fops->revalidate_disk) - disk->fops->revalidate_disk(disk); - if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) - return 0; - if (IS_ERR(state)) /* I/O error reading the partition table */ - return -EIO; - for (p = 1; p < state->limit; p++) { - sector_t size = state->parts[p].size; - sector_t from = state->parts[p].from; - if (!size) - continue; - if (from + size > get_capacity(disk)) { - printk(" %s: p%d exceeds device capacity\n", - disk->disk_name, p); - } - add_partition(disk, p, from, size, state->parts[p].flags); -#ifdef CONFIG_BLK_DEV_MD - if (state->parts[p].flags & ADDPART_FLAG_RAID) - md_autodetect_dev(bdev->bd_dev+p); -#endif - } - kfree(state); - return 0; -} - -unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) -{ - struct address_space *mapping = bdev->bd_inode->i_mapping; - struct page *page; - - page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), - NULL); - if (!IS_ERR(page)) { - if (PageError(page)) - goto fail; - p->v = page; - return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9); -fail: - page_cache_release(page); - } - p->v = NULL; - return NULL; -} - -EXPORT_SYMBOL(read_dev_sector); - -void del_gendisk(struct gendisk *disk) -{ - int p; - - /* invalidate stuff */ - for (p = disk->minors - 1; p > 0; p--) { - invalidate_partition(disk, p); - delete_partition(disk, p); - } - invalidate_partition(disk, 0); - disk->capacity = 0; - disk->flags &= ~GENHD_FL_UP; - unlink_gendisk(disk); - disk_stat_set_all(disk, 0); - disk->stamp = 0; - - kobject_put(disk->holder_dir); - kobject_put(disk->slave_dir); - disk->driverfs_dev = NULL; -#ifndef CONFIG_SYSFS_DEPRECATED - sysfs_remove_link(block_depr, disk->dev.bus_id); -#endif - device_del(&disk->dev); -} |