2005-04-16 22:20:36 +00:00
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/*
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* fs/partitions/check.c
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*
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* Code extracted from drivers/block/genhd.c
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* Copyright (C) 1991-1998 Linus Torvalds
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* Re-organised Feb 1998 Russell King
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*
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* We now have independent partition support from the
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* block drivers, which allows all the partition code to
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* be grouped in one location, and it to be mostly self
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* contained.
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*
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* Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl}
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/kmod.h>
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#include <linux/ctype.h>
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2008-02-08 10:04:35 +00:00
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#include <linux/genhd.h>
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2005-04-16 22:20:36 +00:00
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#include "check.h"
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#include "acorn.h"
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#include "amiga.h"
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#include "atari.h"
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#include "ldm.h"
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#include "mac.h"
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#include "msdos.h"
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#include "osf.h"
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#include "sgi.h"
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#include "sun.h"
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#include "ibm.h"
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#include "ultrix.h"
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#include "efi.h"
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2006-01-17 06:14:20 +00:00
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#include "karma.h"
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2007-05-08 07:29:15 +00:00
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#include "sysv68.h"
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2005-04-16 22:20:36 +00:00
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#ifdef CONFIG_BLK_DEV_MD
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extern void md_autodetect_dev(dev_t dev);
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#endif
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int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/
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static int (*check_part[])(struct parsed_partitions *, struct block_device *) = {
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/*
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* Probe partition formats with tables at disk address 0
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* that also have an ADFS boot block at 0xdc0.
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*/
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#ifdef CONFIG_ACORN_PARTITION_ICS
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adfspart_check_ICS,
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#endif
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#ifdef CONFIG_ACORN_PARTITION_POWERTEC
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adfspart_check_POWERTEC,
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#endif
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#ifdef CONFIG_ACORN_PARTITION_EESOX
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adfspart_check_EESOX,
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#endif
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/*
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* Now move on to formats that only have partition info at
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* disk address 0xdc0. Since these may also have stale
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* PC/BIOS partition tables, they need to come before
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* the msdos entry.
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*/
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#ifdef CONFIG_ACORN_PARTITION_CUMANA
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adfspart_check_CUMANA,
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#endif
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#ifdef CONFIG_ACORN_PARTITION_ADFS
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adfspart_check_ADFS,
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#endif
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#ifdef CONFIG_EFI_PARTITION
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efi_partition, /* this must come before msdos */
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#endif
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#ifdef CONFIG_SGI_PARTITION
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sgi_partition,
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#endif
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#ifdef CONFIG_LDM_PARTITION
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ldm_partition, /* this must come before msdos */
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#endif
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#ifdef CONFIG_MSDOS_PARTITION
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msdos_partition,
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#endif
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#ifdef CONFIG_OSF_PARTITION
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osf_partition,
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#endif
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#ifdef CONFIG_SUN_PARTITION
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sun_partition,
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#endif
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#ifdef CONFIG_AMIGA_PARTITION
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amiga_partition,
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#endif
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#ifdef CONFIG_ATARI_PARTITION
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atari_partition,
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#endif
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#ifdef CONFIG_MAC_PARTITION
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mac_partition,
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#endif
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#ifdef CONFIG_ULTRIX_PARTITION
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ultrix_partition,
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#endif
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#ifdef CONFIG_IBM_PARTITION
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ibm_partition,
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2006-01-17 06:14:20 +00:00
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#endif
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#ifdef CONFIG_KARMA_PARTITION
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karma_partition,
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2007-05-08 07:29:15 +00:00
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#endif
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#ifdef CONFIG_SYSV68_PARTITION
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sysv68_partition,
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2005-04-16 22:20:36 +00:00
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#endif
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NULL
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};
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/*
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* disk_name() is used by partition check code and the genhd driver.
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* It formats the devicename of the indicated disk into
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* the supplied buffer (of size at least 32), and returns
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* a pointer to that same buffer (for convenience).
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*/
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2008-09-03 07:01:09 +00:00
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char *disk_name(struct gendisk *hd, int partno, char *buf)
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2005-04-16 22:20:36 +00:00
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{
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2008-09-03 07:01:09 +00:00
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if (!partno)
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2005-04-16 22:20:36 +00:00
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snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name);
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else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1]))
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2008-09-03 07:01:09 +00:00
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snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno);
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2005-04-16 22:20:36 +00:00
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else
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2008-09-03 07:01:09 +00:00
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snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno);
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2005-04-16 22:20:36 +00:00
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return buf;
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}
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const char *bdevname(struct block_device *bdev, char *buf)
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{
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2008-09-03 07:01:48 +00:00
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int partno = 0;
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if (bdev->bd_part)
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partno = bdev->bd_part->partno;
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2008-09-03 07:01:09 +00:00
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return disk_name(bdev->bd_disk, partno, buf);
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2005-04-16 22:20:36 +00:00
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}
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EXPORT_SYMBOL(bdevname);
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/*
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* There's very little reason to use this, you should really
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* have a struct block_device just about everywhere and use
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* bdevname() instead.
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*/
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const char *__bdevname(dev_t dev, char *buffer)
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{
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scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)",
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MAJOR(dev), MINOR(dev));
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return buffer;
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}
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EXPORT_SYMBOL(__bdevname);
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static struct parsed_partitions *
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check_partition(struct gendisk *hd, struct block_device *bdev)
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{
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struct parsed_partitions *state;
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2006-12-07 04:35:16 +00:00
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int i, res, err;
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2005-04-16 22:20:36 +00:00
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state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL);
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if (!state)
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return NULL;
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2005-06-21 04:15:16 +00:00
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disk_name(hd, 0, state->name);
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printk(KERN_INFO " %s:", state->name);
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if (isdigit(state->name[strlen(state->name)-1]))
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2005-04-16 22:20:36 +00:00
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sprintf(state->name, "p");
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2005-06-21 04:15:16 +00:00
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2008-09-03 07:01:48 +00:00
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state->limit = disk_max_parts(hd) + 1;
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2006-12-07 04:35:16 +00:00
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i = res = err = 0;
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2005-04-16 22:20:36 +00:00
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while (!res && check_part[i]) {
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memset(&state->parts, 0, sizeof(state->parts));
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res = check_part[i++](state, bdev);
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2006-12-07 04:35:16 +00:00
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if (res < 0) {
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/* We have hit an I/O error which we don't report now.
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* But record it, and let the others do their job.
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*/
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err = res;
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res = 0;
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}
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2005-04-16 22:20:36 +00:00
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}
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if (res > 0)
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return state;
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2007-03-08 04:41:24 +00:00
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if (err)
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2006-12-07 04:35:16 +00:00
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/* The partition is unrecognized. So report I/O errors if there were any */
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res = err;
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2005-04-16 22:20:36 +00:00
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if (!res)
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printk(" unknown partition table\n");
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else if (warn_no_part)
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printk(" unable to read partition table\n");
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kfree(state);
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2006-12-07 04:35:14 +00:00
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return ERR_PTR(res);
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2005-04-16 22:20:36 +00:00
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}
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2007-05-21 20:08:01 +00:00
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static ssize_t part_start_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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2005-04-16 22:20:36 +00:00
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{
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2007-05-21 20:08:01 +00:00
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struct hd_struct *p = dev_to_part(dev);
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2005-10-01 12:49:43 +00:00
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2007-05-21 20:08:01 +00:00
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return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
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2005-04-16 22:20:36 +00:00
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}
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2007-05-21 20:08:01 +00:00
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static ssize_t part_size_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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2005-10-01 12:49:43 +00:00
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{
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2007-05-21 20:08:01 +00:00
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struct hd_struct *p = dev_to_part(dev);
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return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
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2005-10-01 12:49:43 +00:00
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}
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2007-05-21 20:08:01 +00:00
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static ssize_t part_stat_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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2005-04-16 22:20:36 +00:00
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{
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2007-05-21 20:08:01 +00:00
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struct hd_struct *p = dev_to_part(dev);
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2008-08-25 10:47:21 +00:00
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int cpu;
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2007-05-21 20:08:01 +00:00
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2008-08-25 10:47:21 +00:00
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cpu = disk_stat_lock();
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part_round_stats(cpu, p);
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disk_stat_unlock();
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2008-02-08 10:04:55 +00:00
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return sprintf(buf,
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"%8lu %8lu %8llu %8u "
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"%8lu %8lu %8llu %8u "
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"%8u %8u %8u"
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"\n",
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part_stat_read(p, ios[READ]),
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part_stat_read(p, merges[READ]),
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(unsigned long long)part_stat_read(p, sectors[READ]),
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jiffies_to_msecs(part_stat_read(p, ticks[READ])),
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part_stat_read(p, ios[WRITE]),
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part_stat_read(p, merges[WRITE]),
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(unsigned long long)part_stat_read(p, sectors[WRITE]),
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jiffies_to_msecs(part_stat_read(p, ticks[WRITE])),
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p->in_flight,
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jiffies_to_msecs(part_stat_read(p, io_ticks)),
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jiffies_to_msecs(part_stat_read(p, time_in_queue)));
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2005-04-16 22:20:36 +00:00
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}
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2006-12-08 10:39:46 +00:00
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#ifdef CONFIG_FAIL_MAKE_REQUEST
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2007-05-21 20:08:01 +00:00
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static ssize_t part_fail_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct hd_struct *p = dev_to_part(dev);
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2006-12-08 10:39:46 +00:00
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2007-05-21 20:08:01 +00:00
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return sprintf(buf, "%d\n", p->make_it_fail);
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}
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static ssize_t part_fail_store(struct device *dev,
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struct device_attribute *attr,
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2006-12-08 10:39:46 +00:00
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const char *buf, size_t count)
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{
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2007-05-21 20:08:01 +00:00
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struct hd_struct *p = dev_to_part(dev);
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2006-12-08 10:39:46 +00:00
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int i;
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if (count > 0 && sscanf(buf, "%d", &i) > 0)
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p->make_it_fail = (i == 0) ? 0 : 1;
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return count;
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}
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2007-05-21 20:08:01 +00:00
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#endif
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2006-12-08 10:39:46 +00:00
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2007-05-21 20:08:01 +00:00
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static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
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static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
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static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL);
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#ifdef CONFIG_FAIL_MAKE_REQUEST
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static struct device_attribute dev_attr_fail =
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__ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store);
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2006-12-08 10:39:46 +00:00
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#endif
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2007-05-21 20:08:01 +00:00
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static struct attribute *part_attrs[] = {
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&dev_attr_start.attr,
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&dev_attr_size.attr,
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&dev_attr_stat.attr,
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2006-12-08 10:39:46 +00:00
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#ifdef CONFIG_FAIL_MAKE_REQUEST
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2007-05-21 20:08:01 +00:00
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&dev_attr_fail.attr,
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2006-12-08 10:39:46 +00:00
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#endif
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2007-05-21 20:08:01 +00:00
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NULL
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2005-04-16 22:20:36 +00:00
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};
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2007-05-21 20:08:01 +00:00
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static struct attribute_group part_attr_group = {
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.attrs = part_attrs,
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};
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2005-04-16 22:20:36 +00:00
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2007-05-21 20:08:01 +00:00
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static struct attribute_group *part_attr_groups[] = {
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&part_attr_group,
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NULL
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};
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static void part_release(struct device *dev)
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2005-04-16 22:20:36 +00:00
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{
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2007-05-21 20:08:01 +00:00
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struct hd_struct *p = dev_to_part(dev);
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2008-02-08 10:04:35 +00:00
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free_part_stats(p);
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2005-04-16 22:20:36 +00:00
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kfree(p);
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}
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2007-05-21 20:08:01 +00:00
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struct device_type part_type = {
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.name = "partition",
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.groups = part_attr_groups,
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2005-04-16 22:20:36 +00:00
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.release = part_release,
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};
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2006-03-27 09:17:55 +00:00
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static inline void disk_sysfs_add_subdirs(struct gendisk *disk)
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{
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struct kobject *k;
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2007-05-21 20:08:01 +00:00
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k = kobject_get(&disk->dev.kobj);
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2007-11-06 06:24:43 +00:00
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disk->holder_dir = kobject_create_and_add("holders", k);
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disk->slave_dir = kobject_create_and_add("slaves", k);
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2006-03-27 09:17:55 +00:00
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kobject_put(k);
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}
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2008-09-03 07:03:02 +00:00
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static void delete_partition_rcu_cb(struct rcu_head *head)
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|
|
|
{
|
|
|
|
struct hd_struct *part = container_of(head, struct hd_struct, rcu_head);
|
|
|
|
|
|
|
|
part->start_sect = 0;
|
|
|
|
part->nr_sects = 0;
|
|
|
|
part_stat_set_all(part, 0);
|
|
|
|
put_device(&part->dev);
|
|
|
|
}
|
|
|
|
|
2008-09-03 07:01:09 +00:00
|
|
|
void delete_partition(struct gendisk *disk, int partno)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-09-03 07:03:02 +00:00
|
|
|
struct hd_struct *part;
|
2007-05-21 20:08:01 +00:00
|
|
|
|
2008-09-03 07:03:02 +00:00
|
|
|
part = disk->__part[partno-1];
|
|
|
|
if (!part)
|
2005-04-16 22:20:36 +00:00
|
|
|
return;
|
2008-09-03 07:03:02 +00:00
|
|
|
|
2008-08-25 10:47:22 +00:00
|
|
|
blk_free_devt(part_devt(part));
|
2008-09-03 07:03:02 +00:00
|
|
|
rcu_assign_pointer(disk->__part[partno-1], NULL);
|
|
|
|
kobject_put(part->holder_dir);
|
|
|
|
device_del(&part->dev);
|
|
|
|
|
|
|
|
call_rcu(&part->rcu_head, delete_partition_rcu_cb);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-02-07 07:33:39 +00:00
|
|
|
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);
|
|
|
|
|
2008-09-03 07:01:09 +00:00
|
|
|
int add_partition(struct gendisk *disk, int partno,
|
|
|
|
sector_t start, sector_t len, int flags)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct hd_struct *p;
|
2008-08-25 10:47:22 +00:00
|
|
|
dev_t devt = MKDEV(0, 0);
|
2007-05-21 20:08:01 +00:00
|
|
|
int err;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-09-03 07:03:02 +00:00
|
|
|
if (disk->__part[partno - 1])
|
2008-08-25 10:30:16 +00:00
|
|
|
return -EBUSY;
|
|
|
|
|
some kmalloc/memset ->kzalloc (tree wide)
Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).
Here is a short excerpt of the semantic patch performing
this transformation:
@@
type T2;
expression x;
identifier f,fld;
expression E;
expression E1,E2;
expression e1,e2,e3,y;
statement S;
@@
x =
- kmalloc
+ kzalloc
(E1,E2)
... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\)
- memset((T2)x,0,E1);
@@
expression E1,E2,E3;
@@
- kzalloc(E1 * E2,E3)
+ kcalloc(E1,E2,E3)
[akpm@linux-foundation.org: get kcalloc args the right way around]
Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Bryan Wu <bryan.wu@analog.com>
Acked-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Acked-by: Roland Dreier <rolandd@cisco.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Acked-by: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Greg KH <greg@kroah.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 08:49:03 +00:00
|
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!p)
|
2008-07-25 08:48:25 +00:00
|
|
|
return -ENOMEM;
|
2007-05-21 20:08:01 +00:00
|
|
|
|
2008-02-08 10:04:35 +00:00
|
|
|
if (!init_part_stats(p)) {
|
2008-07-25 08:48:25 +00:00
|
|
|
err = -ENOMEM;
|
2008-08-25 10:30:16 +00:00
|
|
|
goto out_free;
|
2008-02-08 10:04:35 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
p->start_sect = start;
|
|
|
|
p->nr_sects = len;
|
2008-09-03 07:01:09 +00:00
|
|
|
p->partno = partno;
|
2006-07-10 11:44:00 +00:00
|
|
|
p->policy = disk->policy;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-05-21 20:08:01 +00:00
|
|
|
if (isdigit(disk->dev.bus_id[strlen(disk->dev.bus_id)-1]))
|
|
|
|
snprintf(p->dev.bus_id, BUS_ID_SIZE,
|
2008-09-03 07:01:09 +00:00
|
|
|
"%sp%d", disk->dev.bus_id, partno);
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
2007-05-21 20:08:01 +00:00
|
|
|
snprintf(p->dev.bus_id, BUS_ID_SIZE,
|
2008-09-03 07:01:09 +00:00
|
|
|
"%s%d", disk->dev.bus_id, partno);
|
2007-05-21 20:08:01 +00:00
|
|
|
|
|
|
|
device_initialize(&p->dev);
|
|
|
|
p->dev.class = &block_class;
|
|
|
|
p->dev.type = &part_type;
|
|
|
|
p->dev.parent = &disk->dev;
|
|
|
|
|
2008-08-25 10:47:22 +00:00
|
|
|
err = blk_alloc_devt(p, &devt);
|
|
|
|
if (err)
|
|
|
|
goto out_put;
|
|
|
|
p->dev.devt = devt;
|
|
|
|
|
2007-05-21 20:08:01 +00:00
|
|
|
/* delay uevent until 'holders' subdir is created */
|
|
|
|
p->dev.uevent_suppress = 1;
|
2008-07-25 08:48:25 +00:00
|
|
|
err = device_add(&p->dev);
|
|
|
|
if (err)
|
2008-08-25 10:30:16 +00:00
|
|
|
goto out_put;
|
|
|
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
p->holder_dir = kobject_create_and_add("holders", &p->dev.kobj);
|
|
|
|
if (!p->holder_dir)
|
|
|
|
goto out_del;
|
|
|
|
|
2007-05-21 20:08:01 +00:00
|
|
|
p->dev.uevent_suppress = 0;
|
2008-07-25 08:48:25 +00:00
|
|
|
if (flags & ADDPART_FLAG_WHOLEDISK) {
|
2008-02-07 07:33:39 +00:00
|
|
|
err = device_create_file(&p->dev, &dev_attr_whole_disk);
|
2008-07-25 08:48:25 +00:00
|
|
|
if (err)
|
2008-08-25 10:30:16 +00:00
|
|
|
goto out_del;
|
2008-07-25 08:48:25 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-08-25 10:30:16 +00:00
|
|
|
/* everything is up and running, commence */
|
2008-09-03 07:03:02 +00:00
|
|
|
INIT_RCU_HEAD(&p->rcu_head);
|
|
|
|
rcu_assign_pointer(disk->__part[partno - 1], p);
|
2008-08-25 10:30:16 +00:00
|
|
|
|
2007-05-21 20:08:01 +00:00
|
|
|
/* suppress uevent if the disk supresses it */
|
|
|
|
if (!disk->dev.uevent_suppress)
|
|
|
|
kobject_uevent(&p->dev.kobj, KOBJ_ADD);
|
2008-07-25 08:48:25 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
2008-08-25 10:30:16 +00:00
|
|
|
out_free:
|
|
|
|
kfree(p);
|
|
|
|
return err;
|
|
|
|
out_del:
|
|
|
|
kobject_put(p->holder_dir);
|
2008-07-25 08:48:25 +00:00
|
|
|
device_del(&p->dev);
|
2008-08-25 10:30:16 +00:00
|
|
|
out_put:
|
2008-07-25 08:48:25 +00:00
|
|
|
put_device(&p->dev);
|
2008-08-25 10:47:22 +00:00
|
|
|
blk_free_devt(devt);
|
2008-07-25 08:48:25 +00:00
|
|
|
return err;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Not exported, helper to add_disk(). */
|
|
|
|
void register_disk(struct gendisk *disk)
|
|
|
|
{
|
|
|
|
struct block_device *bdev;
|
2008-09-03 07:03:02 +00:00
|
|
|
struct disk_part_iter piter;
|
|
|
|
struct hd_struct *part;
|
2005-04-16 22:20:36 +00:00
|
|
|
char *s;
|
|
|
|
int err;
|
|
|
|
|
2007-05-21 20:08:01 +00:00
|
|
|
disk->dev.parent = disk->driverfs_dev;
|
|
|
|
|
2008-05-02 04:02:41 +00:00
|
|
|
strlcpy(disk->dev.bus_id, disk->disk_name, BUS_ID_SIZE);
|
2007-05-21 20:08:01 +00:00
|
|
|
/* ewww... some of these buggers have / in the name... */
|
|
|
|
s = strchr(disk->dev.bus_id, '/');
|
2005-04-16 22:20:36 +00:00
|
|
|
if (s)
|
|
|
|
*s = '!';
|
2007-05-21 20:08:01 +00:00
|
|
|
|
|
|
|
/* delay uevents, until we scanned partition table */
|
|
|
|
disk->dev.uevent_suppress = 1;
|
|
|
|
|
|
|
|
if (device_add(&disk->dev))
|
2005-04-16 22:20:36 +00:00
|
|
|
return;
|
2007-05-21 20:08:01 +00:00
|
|
|
#ifndef CONFIG_SYSFS_DEPRECATED
|
|
|
|
err = sysfs_create_link(block_depr, &disk->dev.kobj,
|
|
|
|
kobject_name(&disk->dev.kobj));
|
2006-10-17 07:10:23 +00:00
|
|
|
if (err) {
|
2007-05-21 20:08:01 +00:00
|
|
|
device_del(&disk->dev);
|
2006-10-17 07:10:23 +00:00
|
|
|
return;
|
|
|
|
}
|
2007-05-21 20:08:01 +00:00
|
|
|
#endif
|
|
|
|
disk_sysfs_add_subdirs(disk);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* No minors to use for partitions */
|
2008-09-03 07:01:48 +00:00
|
|
|
if (!disk_max_parts(disk))
|
2006-03-24 19:45:35 +00:00
|
|
|
goto exit;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* No such device (e.g., media were just removed) */
|
|
|
|
if (!get_capacity(disk))
|
2006-03-24 19:45:35 +00:00
|
|
|
goto exit;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
bdev = bdget_disk(disk, 0);
|
|
|
|
if (!bdev)
|
2006-03-24 19:45:35 +00:00
|
|
|
goto exit;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
bdev->bd_invalidated = 1;
|
2006-03-24 19:45:35 +00:00
|
|
|
err = blkdev_get(bdev, FMODE_READ, 0);
|
|
|
|
if (err < 0)
|
|
|
|
goto exit;
|
2005-04-16 22:20:36 +00:00
|
|
|
blkdev_put(bdev);
|
2006-03-24 19:45:35 +00:00
|
|
|
|
|
|
|
exit:
|
2007-05-21 20:08:01 +00:00
|
|
|
/* announce disk after possible partitions are created */
|
|
|
|
disk->dev.uevent_suppress = 0;
|
|
|
|
kobject_uevent(&disk->dev.kobj, KOBJ_ADD);
|
2006-03-24 19:45:35 +00:00
|
|
|
|
|
|
|
/* announce possible partitions */
|
2008-09-03 07:03:02 +00:00
|
|
|
disk_part_iter_init(&piter, disk, 0);
|
|
|
|
while ((part = disk_part_iter_next(&piter)))
|
|
|
|
kobject_uevent(&part->dev.kobj, KOBJ_ADD);
|
|
|
|
disk_part_iter_exit(&piter);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
|
|
|
|
{
|
2008-09-03 07:03:02 +00:00
|
|
|
struct disk_part_iter piter;
|
|
|
|
struct hd_struct *part;
|
2005-04-16 22:20:36 +00:00
|
|
|
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;
|
2008-09-03 07:03:02 +00:00
|
|
|
|
|
|
|
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
|
|
|
|
while ((part = disk_part_iter_next(&piter)))
|
|
|
|
delete_partition(disk, part->partno);
|
|
|
|
disk_part_iter_exit(&piter);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (disk->fops->revalidate_disk)
|
|
|
|
disk->fops->revalidate_disk(disk);
|
|
|
|
if (!get_capacity(disk) || !(state = check_partition(disk, bdev)))
|
|
|
|
return 0;
|
2006-12-07 04:35:14 +00:00
|
|
|
if (IS_ERR(state)) /* I/O error reading the partition table */
|
2007-03-16 21:38:25 +00:00
|
|
|
return -EIO;
|
2008-03-09 20:26:02 +00:00
|
|
|
|
|
|
|
/* tell userspace that the media / partition table may have changed */
|
|
|
|
kobject_uevent(&disk->dev.kobj, KOBJ_CHANGE);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
for (p = 1; p < state->limit; p++) {
|
|
|
|
sector_t size = state->parts[p].size;
|
|
|
|
sector_t from = state->parts[p].from;
|
|
|
|
if (!size)
|
|
|
|
continue;
|
2006-06-23 09:06:07 +00:00
|
|
|
if (from + size > get_capacity(disk)) {
|
2008-09-13 09:33:25 +00:00
|
|
|
printk(KERN_WARNING
|
|
|
|
"%s: p%d exceeds device capacity\n",
|
2006-06-23 09:06:07 +00:00
|
|
|
disk->disk_name, p);
|
2008-07-25 08:48:26 +00:00
|
|
|
}
|
|
|
|
res = add_partition(disk, p, from, size, state->parts[p].flags);
|
|
|
|
if (res) {
|
|
|
|
printk(KERN_ERR " %s: p%d could not be added: %d\n",
|
|
|
|
disk->disk_name, p, -res);
|
|
|
|
continue;
|
2006-06-23 09:06:07 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
#ifdef CONFIG_BLK_DEV_MD
|
2007-02-11 07:50:00 +00:00
|
|
|
if (state->parts[p].flags & ADDPART_FLAG_RAID)
|
2005-04-16 22:20:36 +00:00
|
|
|
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;
|
|
|
|
|
2006-06-23 09:05:08 +00:00
|
|
|
page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)),
|
|
|
|
NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
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)
|
|
|
|
{
|
2008-09-03 07:03:02 +00:00
|
|
|
struct disk_part_iter piter;
|
|
|
|
struct hd_struct *part;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* invalidate stuff */
|
2008-09-03 07:03:02 +00:00
|
|
|
disk_part_iter_init(&piter, disk,
|
|
|
|
DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
|
|
|
|
while ((part = disk_part_iter_next(&piter))) {
|
|
|
|
invalidate_partition(disk, part->partno);
|
|
|
|
delete_partition(disk, part->partno);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2008-09-03 07:03:02 +00:00
|
|
|
disk_part_iter_exit(&piter);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
invalidate_partition(disk, 0);
|
|
|
|
disk->capacity = 0;
|
|
|
|
disk->flags &= ~GENHD_FL_UP;
|
|
|
|
unlink_gendisk(disk);
|
|
|
|
disk_stat_set_all(disk, 0);
|
2005-10-13 19:48:42 +00:00
|
|
|
disk->stamp = 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-12-20 16:13:05 +00:00
|
|
|
kobject_put(disk->holder_dir);
|
|
|
|
kobject_put(disk->slave_dir);
|
2007-05-21 20:08:01 +00:00
|
|
|
disk->driverfs_dev = NULL;
|
|
|
|
#ifndef CONFIG_SYSFS_DEPRECATED
|
|
|
|
sysfs_remove_link(block_depr, disk->dev.bus_id);
|
|
|
|
#endif
|
|
|
|
device_del(&disk->dev);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|