diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-ioctl.c | 9 | ||||
| -rw-r--r-- | drivers/md/dm.c | 35 | ||||
| -rw-r--r-- | drivers/md/dm.h | 13 |
3 files changed, 26 insertions, 31 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index f7e743691aa..c826b3e1799 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -1,6 +1,6 @@ /* * Copyright (C) 2001, 2002 Sistina Software (UK) Limited. - * Copyright (C) 2004 - 2005 Red Hat, Inc. All rights reserved. + * Copyright (C) 2004 - 2006 Red Hat, Inc. All rights reserved. * * This file is released under the GPL. */ @@ -578,7 +578,7 @@ static int __dev_status(struct mapped_device *md, struct dm_ioctl *param) static int dev_create(struct dm_ioctl *param, size_t param_size) { - int r; + int r, m = DM_ANY_MINOR; struct mapped_device *md; r = check_name(param->name); @@ -586,10 +586,9 @@ static int dev_create(struct dm_ioctl *param, size_t param_size) return r; if (param->flags & DM_PERSISTENT_DEV_FLAG) - r = dm_create_with_minor(MINOR(huge_decode_dev(param->dev)), &md); - else - r = dm_create(&md); + m = MINOR(huge_decode_dev(param->dev)); + r = dm_create(m, &md); if (r) return r; diff --git a/drivers/md/dm.c b/drivers/md/dm.c index dfd03785890..59bf797de9a 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1,6 +1,6 @@ /* * Copyright (C) 2001, 2002 Sistina Software (UK) Limited. - * Copyright (C) 2004 Red Hat, Inc. All rights reserved. + * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This file is released under the GPL. */ @@ -764,7 +764,7 @@ static int dm_any_congested(void *congested_data, int bdi_bits) *---------------------------------------------------------------*/ static DEFINE_IDR(_minor_idr); -static void free_minor(unsigned int minor) +static void free_minor(int minor) { spin_lock(&_minor_lock); idr_remove(&_minor_idr, minor); @@ -774,7 +774,7 @@ static void free_minor(unsigned int minor) /* * See if the device with a specific minor # is free. */ -static int specific_minor(struct mapped_device *md, unsigned int minor) +static int specific_minor(struct mapped_device *md, int minor) { int r, m; @@ -807,10 +807,9 @@ out: return r; } -static int next_free_minor(struct mapped_device *md, unsigned int *minor) +static int next_free_minor(struct mapped_device *md, int *minor) { - int r; - unsigned int m; + int r, m; r = idr_pre_get(&_minor_idr, GFP_KERNEL); if (!r) @@ -841,7 +840,7 @@ static struct block_device_operations dm_blk_dops; /* * Allocate and initialise a blank device with a given minor. */ -static struct mapped_device *alloc_dev(unsigned int minor, int persistent) +static struct mapped_device *alloc_dev(int minor) { int r; struct mapped_device *md = kmalloc(sizeof(*md), GFP_KERNEL); @@ -856,7 +855,10 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent) goto bad0; /* get a minor number for the dev */ - r = persistent ? specific_minor(md, minor) : next_free_minor(md, &minor); + if (minor == DM_ANY_MINOR) + r = next_free_minor(md, &minor); + else + r = specific_minor(md, minor); if (r < 0) goto bad1; @@ -929,7 +931,7 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent) static void free_dev(struct mapped_device *md) { - unsigned int minor = md->disk->first_minor; + int minor = md->disk->first_minor; if (md->suspended_bdev) { thaw_bdev(md->suspended_bdev, NULL); @@ -1015,12 +1017,11 @@ static void __unbind(struct mapped_device *md) /* * Constructor for a new device. */ -static int create_aux(unsigned int minor, int persistent, - struct mapped_device **result) +int dm_create(int minor, struct mapped_device **result) { struct mapped_device *md; - md = alloc_dev(minor, persistent); + md = alloc_dev(minor); if (!md) return -ENXIO; @@ -1028,16 +1029,6 @@ static int create_aux(unsigned int minor, int persistent, return 0; } -int dm_create(struct mapped_device **result) -{ - return create_aux(0, 0, result); -} - -int dm_create_with_minor(unsigned int minor, struct mapped_device **result) -{ - return create_aux(minor, 1, result); -} - static struct mapped_device *dm_find_md(dev_t dev) { struct mapped_device *md; diff --git a/drivers/md/dm.h b/drivers/md/dm.h index fd90bc8f9e4..2901ab94319 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -2,7 +2,7 @@ * Internal header file for device mapper * * Copyright (C) 2001, 2002 Sistina Software - * Copyright (C) 2004 Red Hat, Inc. All rights reserved. + * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This file is released under the LGPL. */ @@ -45,16 +45,21 @@ struct mapped_device; * Functions for manipulating a struct mapped_device. * Drop the reference with dm_put when you finish with the object. *---------------------------------------------------------------*/ -int dm_create(struct mapped_device **md); -int dm_create_with_minor(unsigned int minor, struct mapped_device **md); + +/* + * DM_ANY_MINOR allocates any available minor number. + */ +#define DM_ANY_MINOR (-1) +int dm_create(int minor, struct mapped_device **md); + void dm_set_mdptr(struct mapped_device *md, void *ptr); void *dm_get_mdptr(struct mapped_device *md); -struct mapped_device *dm_get_md(dev_t dev); /* * Reference counting for md. */ void dm_get(struct mapped_device *md); +struct mapped_device *dm_get_md(dev_t dev); void dm_put(struct mapped_device *md); /* |