aboutsummaryrefslogtreecommitdiff
path: root/fs/partitions/check.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/partitions/check.c')
-rw-r--r--fs/partitions/check.c618
1 files changed, 0 insertions, 618 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
deleted file mode 100644
index 783c57ec07d..00000000000
--- a/fs/partitions/check.c
+++ /dev/null
@@ -1,618 +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 "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);
-}
-
-/*
- * sysfs bindings for partitions
- */
-
-struct part_attribute {
- struct attribute attr;
- ssize_t (*show)(struct hd_struct *,char *);
- ssize_t (*store)(struct hd_struct *,const char *, size_t);
-};
-
-static ssize_t
-part_attr_show(struct kobject * kobj, struct attribute * attr, char * page)
-{
- struct hd_struct * p = container_of(kobj,struct hd_struct,kobj);
- struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr);
- ssize_t ret = 0;
- if (part_attr->show)
- ret = part_attr->show(p, page);
- return ret;
-}
-static ssize_t
-part_attr_store(struct kobject * kobj, struct attribute * attr,
- const char *page, size_t count)
-{
- struct hd_struct * p = container_of(kobj,struct hd_struct,kobj);
- struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr);
- ssize_t ret = 0;
-
- if (part_attr->store)
- ret = part_attr->store(p, page, count);
- return ret;
-}
-
-static struct sysfs_ops part_sysfs_ops = {
- .show = part_attr_show,
- .store = part_attr_store,
-};
-
-static ssize_t part_uevent_store(struct hd_struct * p,
- const char *page, size_t count)
-{
- kobject_uevent(&p->kobj, KOBJ_ADD);
- return count;
-}
-static ssize_t part_dev_read(struct hd_struct * p, char *page)
-{
- struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj);
- dev_t dev = MKDEV(disk->major, disk->first_minor + p->partno);
- return print_dev_t(page, dev);
-}
-static ssize_t part_start_read(struct hd_struct * p, char *page)
-{
- return sprintf(page, "%llu\n",(unsigned long long)p->start_sect);
-}
-static ssize_t part_size_read(struct hd_struct * p, char *page)
-{
- return sprintf(page, "%llu\n",(unsigned long long)p->nr_sects);
-}
-static ssize_t part_stat_read(struct hd_struct * p, char *page)
-{
- return sprintf(page, "%8u %8llu %8u %8llu\n",
- p->ios[0], (unsigned long long)p->sectors[0],
- p->ios[1], (unsigned long long)p->sectors[1]);
-}
-static struct part_attribute part_attr_uevent = {
- .attr = {.name = "uevent", .mode = S_IWUSR },
- .store = part_uevent_store
-};
-static struct part_attribute part_attr_dev = {
- .attr = {.name = "dev", .mode = S_IRUGO },
- .show = part_dev_read
-};
-static struct part_attribute part_attr_start = {
- .attr = {.name = "start", .mode = S_IRUGO },
- .show = part_start_read
-};
-static struct part_attribute part_attr_size = {
- .attr = {.name = "size", .mode = S_IRUGO },
- .show = part_size_read
-};
-static struct part_attribute part_attr_stat = {
- .attr = {.name = "stat", .mode = S_IRUGO },
- .show = part_stat_read
-};
-
-#ifdef CONFIG_FAIL_MAKE_REQUEST
-
-static ssize_t part_fail_store(struct hd_struct * p,
- const char *buf, size_t count)
-{
- int i;
-
- if (count > 0 && sscanf(buf, "%d", &i) > 0)
- p->make_it_fail = (i == 0) ? 0 : 1;
-
- return count;
-}
-static ssize_t part_fail_read(struct hd_struct * p, char *page)
-{
- return sprintf(page, "%d\n", p->make_it_fail);
-}
-static struct part_attribute part_attr_fail = {
- .attr = {.name = "make-it-fail", .mode = S_IRUGO | S_IWUSR },
- .store = part_fail_store,
- .show = part_fail_read
-};
-
-#endif
-
-static struct attribute * default_attrs[] = {
- &part_attr_uevent.attr,
- &part_attr_dev.attr,
- &part_attr_start.attr,
- &part_attr_size.attr,
- &part_attr_stat.attr,
-#ifdef CONFIG_FAIL_MAKE_REQUEST
- &part_attr_fail.attr,
-#endif
- NULL,
-};
-
-extern struct kset block_subsys;
-
-static void part_release(struct kobject *kobj)
-{
- struct hd_struct * p = container_of(kobj,struct hd_struct,kobj);
- kfree(p);
-}
-
-struct kobj_type ktype_part = {
- .release = part_release,
- .default_attrs = default_attrs,
- .sysfs_ops = &part_sysfs_ops,
-};
-
-static inline void partition_sysfs_add_subdir(struct hd_struct *p)
-{
- struct kobject *k;
-
- k = kobject_get(&p->kobj);
- p->holder_dir = kobject_add_dir(k, "holders");
- kobject_put(k);
-}
-
-static inline void disk_sysfs_add_subdirs(struct gendisk *disk)
-{
- struct kobject *k;
-
- k = kobject_get(&disk->kobj);
- disk->holder_dir = kobject_add_dir(k, "holders");
- disk->slave_dir = kobject_add_dir(k, "slaves");
- 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;
- p->ios[0] = p->ios[1] = 0;
- p->sectors[0] = p->sectors[1] = 0;
- sysfs_remove_link(&p->kobj, "subsystem");
- kobject_unregister(p->holder_dir);
- kobject_uevent(&p->kobj, KOBJ_REMOVE);
- kobject_del(&p->kobj);
- kobject_put(&p->kobj);
-}
-
-void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
-{
- struct hd_struct *p;
-
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
-
- p->start_sect = start;
- p->nr_sects = len;
- p->partno = part;
- p->policy = disk->policy;
-
- if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1]))
- snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part);
- else
- snprintf(p->kobj.name,KOBJ_NAME_LEN,"%s%d",disk->kobj.name,part);
- p->kobj.parent = &disk->kobj;
- p->kobj.ktype = &ktype_part;
- kobject_init(&p->kobj);
- kobject_add(&p->kobj);
- if (!disk->part_uevent_suppress)
- kobject_uevent(&p->kobj, KOBJ_ADD);
- sysfs_create_link(&p->kobj, &block_subsys.kobj, "subsystem");
- if (flags & ADDPART_FLAG_WHOLEDISK) {
- static struct attribute addpartattr = {
- .name = "whole_disk",
- .mode = S_IRUSR | S_IRGRP | S_IROTH,
- };
-
- sysfs_create_file(&p->kobj, &addpartattr);
- }
- partition_sysfs_add_subdir(p);
- disk->part[part-1] = p;
-}
-
-static char *make_block_name(struct gendisk *disk)
-{
- char *name;
- static char *block_str = "block:";
- int size;
- char *s;
-
- size = strlen(block_str) + strlen(disk->disk_name) + 1;
- name = kmalloc(size, GFP_KERNEL);
- if (!name)
- return NULL;
- strcpy(name, block_str);
- strcat(name, disk->disk_name);
- /* ewww... some of these buggers have / in name... */
- s = strchr(name, '/');
- if (s)
- *s = '!';
- return name;
-}
-
-static int disk_sysfs_symlinks(struct gendisk *disk)
-{
- struct device *target = get_device(disk->driverfs_dev);
- int err;
- char *disk_name = NULL;
-
- if (target) {
- disk_name = make_block_name(disk);
- if (!disk_name) {
- err = -ENOMEM;
- goto err_out;
- }
-
- err = sysfs_create_link(&disk->kobj, &target->kobj, "device");
- if (err)
- goto err_out_disk_name;
-
- err = sysfs_create_link(&target->kobj, &disk->kobj, disk_name);
- if (err)
- goto err_out_dev_link;
- }
-
- err = sysfs_create_link(&disk->kobj, &block_subsys.kobj,
- "subsystem");
- if (err)
- goto err_out_disk_name_lnk;
-
- kfree(disk_name);
-
- return 0;
-
-err_out_disk_name_lnk:
- if (target) {
- sysfs_remove_link(&target->kobj, disk_name);
-err_out_dev_link:
- sysfs_remove_link(&disk->kobj, "device");
-err_out_disk_name:
- kfree(disk_name);
-err_out:
- put_device(target);
- }
- return err;
-}
-
-/* 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;
-
- strlcpy(disk->kobj.name,disk->disk_name,KOBJ_NAME_LEN);
- /* ewww... some of these buggers have / in name... */
- s = strchr(disk->kobj.name, '/');
- if (s)
- *s = '!';
- if ((err = kobject_add(&disk->kobj)))
- return;
- err = disk_sysfs_symlinks(disk);
- if (err) {
- kobject_del(&disk->kobj);
- return;
- }
- 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;
-
- /* scan partition table, but suppress uevents */
- bdev->bd_invalidated = 1;
- disk->part_uevent_suppress = 1;
- err = blkdev_get(bdev, FMODE_READ, 0);
- disk->part_uevent_suppress = 0;
- if (err < 0)
- goto exit;
- blkdev_put(bdev);
-
-exit:
- /* announce disk after possible partitions are already created */
- kobject_uevent(&disk->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->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_uevent(&disk->kobj, KOBJ_REMOVE);
- kobject_unregister(disk->holder_dir);
- kobject_unregister(disk->slave_dir);
- if (disk->driverfs_dev) {
- char *disk_name = make_block_name(disk);
- sysfs_remove_link(&disk->kobj, "device");
- if (disk_name) {
- sysfs_remove_link(&disk->driverfs_dev->kobj, disk_name);
- kfree(disk_name);
- }
- put_device(disk->driverfs_dev);
- disk->driverfs_dev = NULL;
- }
- sysfs_remove_link(&disk->kobj, "subsystem");
- kobject_del(&disk->kobj);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 21:55:59 +0000