dm.c (8dd87f3c5283de7f95396a236e420487226f3951) dm.c (701510875975ed7e188566de205990d29f34c8d8)
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm-core.h"

--- 3064 unchanged lines hidden (view full) ---

3073}
3074
3075struct dm_pr {
3076 u64 old_key;
3077 u64 new_key;
3078 u32 flags;
3079 bool fail_early;
3080 int ret;
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm-core.h"

--- 3064 unchanged lines hidden (view full) ---

3073}
3074
3075struct dm_pr {
3076 u64 old_key;
3077 u64 new_key;
3078 u32 flags;
3079 bool fail_early;
3080 int ret;
3081 enum pr_type type;
3081};
3082
3083static int dm_call_pr(struct block_device *bdev, iterate_devices_callout_fn fn,
3084 struct dm_pr *pr)
3085{
3086 struct mapped_device *md = bdev->bd_disk->private_data;
3087 struct dm_table *table;
3088 struct dm_target *ti;

--- 81 unchanged lines hidden (view full) ---

3170 pr.old_key = new_key;
3171 pr.new_key = 0;
3172 pr.flags = 0;
3173 pr.fail_early = false;
3174 (void) dm_call_pr(bdev, __dm_pr_register, &pr);
3175 return ret;
3176}
3177
3082};
3083
3084static int dm_call_pr(struct block_device *bdev, iterate_devices_callout_fn fn,
3085 struct dm_pr *pr)
3086{
3087 struct mapped_device *md = bdev->bd_disk->private_data;
3088 struct dm_table *table;
3089 struct dm_target *ti;

--- 81 unchanged lines hidden (view full) ---

3171 pr.old_key = new_key;
3172 pr.new_key = 0;
3173 pr.flags = 0;
3174 pr.fail_early = false;
3175 (void) dm_call_pr(bdev, __dm_pr_register, &pr);
3176 return ret;
3177}
3178
3179
3180static int __dm_pr_reserve(struct dm_target *ti, struct dm_dev *dev,
3181 sector_t start, sector_t len, void *data)
3182{
3183 struct dm_pr *pr = data;
3184 const struct pr_ops *ops = dev->bdev->bd_disk->fops->pr_ops;
3185
3186 if (!ops || !ops->pr_reserve) {
3187 pr->ret = -EOPNOTSUPP;
3188 return -1;
3189 }
3190
3191 pr->ret = ops->pr_reserve(dev->bdev, pr->old_key, pr->type, pr->flags);
3192 if (!pr->ret)
3193 return -1;
3194
3195 return 0;
3196}
3197
3178static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
3179 u32 flags)
3180{
3198static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
3199 u32 flags)
3200{
3181 struct mapped_device *md = bdev->bd_disk->private_data;
3182 const struct pr_ops *ops;
3183 int r, srcu_idx;
3201 struct dm_pr pr = {
3202 .old_key = key,
3203 .flags = flags,
3204 .type = type,
3205 .fail_early = false,
3206 .ret = 0,
3207 };
3208 int ret;
3184
3209
3185 r = dm_prepare_ioctl(md, &srcu_idx, &bdev);
3186 if (r < 0)
3187 goto out;
3210 ret = dm_call_pr(bdev, __dm_pr_reserve, &pr);
3211 if (ret)
3212 return ret;
3188
3213
3189 ops = bdev->bd_disk->fops->pr_ops;
3190 if (ops && ops->pr_reserve)
3191 r = ops->pr_reserve(bdev, key, type, flags);
3192 else
3193 r = -EOPNOTSUPP;
3194out:
3195 dm_unprepare_ioctl(md, srcu_idx);
3196 return r;
3214 return pr.ret;
3197}
3198
3199static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
3200{
3201 struct mapped_device *md = bdev->bd_disk->private_data;
3202 const struct pr_ops *ops;
3203 int r, srcu_idx;
3204

--- 111 unchanged lines hidden --- 		3215}
3216
3217static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
3218{
3219 struct mapped_device *md = bdev->bd_disk->private_data;
3220 const struct pr_ops *ops;
3221 int r, srcu_idx;
3222

--- 111 unchanged lines hidden ---