mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 03:23:53 -04:00
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2001-2002 Sistina Software (UK) Limited.
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* Copyright (C) 2006-2008 Red Hat GmbH
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*
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* This file is released under the GPL.
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*/
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#include "dm-exception-store.h"
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/vmalloc.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/dm-io.h>
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#define DM_MSG_PREFIX "transient snapshot"
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/*
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*---------------------------------------------------------------
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* Implementation of the store for non-persistent snapshots.
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*---------------------------------------------------------------
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*/
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struct transient_c {
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sector_t next_free;
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};
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static void transient_dtr(struct dm_exception_store *store)
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{
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kfree(store->context);
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}
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static int transient_read_metadata(struct dm_exception_store *store,
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int (*callback)(void *callback_context,
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chunk_t old, chunk_t new),
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void *callback_context)
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{
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return 0;
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}
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static int transient_prepare_exception(struct dm_exception_store *store,
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struct dm_exception *e)
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{
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struct transient_c *tc = store->context;
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sector_t size = get_dev_size(dm_snap_cow(store->snap)->bdev);
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if (size < (tc->next_free + store->chunk_size))
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return -1;
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e->new_chunk = sector_to_chunk(store, tc->next_free);
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tc->next_free += store->chunk_size;
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return 0;
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}
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static void transient_commit_exception(struct dm_exception_store *store,
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struct dm_exception *e, int valid,
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void (*callback)(void *, int success),
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void *callback_context)
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{
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/* Just succeed */
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callback(callback_context, valid);
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}
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static void transient_usage(struct dm_exception_store *store,
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sector_t *total_sectors,
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sector_t *sectors_allocated,
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sector_t *metadata_sectors)
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{
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*sectors_allocated = ((struct transient_c *) store->context)->next_free;
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*total_sectors = get_dev_size(dm_snap_cow(store->snap)->bdev);
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*metadata_sectors = 0;
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}
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static int transient_ctr(struct dm_exception_store *store, char *options)
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{
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struct transient_c *tc;
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tc = kmalloc_obj(struct transient_c);
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if (!tc)
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return -ENOMEM;
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tc->next_free = 0;
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store->context = tc;
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return 0;
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}
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static unsigned int transient_status(struct dm_exception_store *store,
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status_type_t status, char *result,
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unsigned int maxlen)
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{
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unsigned int sz = 0;
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switch (status) {
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case STATUSTYPE_INFO:
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break;
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case STATUSTYPE_TABLE:
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DMEMIT(" N %llu", (unsigned long long)store->chunk_size);
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break;
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case STATUSTYPE_IMA:
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*result = '\0';
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break;
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}
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return sz;
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}
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static struct dm_exception_store_type _transient_type = {
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.name = "transient",
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.module = THIS_MODULE,
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.ctr = transient_ctr,
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.dtr = transient_dtr,
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.read_metadata = transient_read_metadata,
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.prepare_exception = transient_prepare_exception,
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.commit_exception = transient_commit_exception,
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.usage = transient_usage,
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.status = transient_status,
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};
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static struct dm_exception_store_type _transient_compat_type = {
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.name = "N",
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.module = THIS_MODULE,
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.ctr = transient_ctr,
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.dtr = transient_dtr,
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.read_metadata = transient_read_metadata,
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.prepare_exception = transient_prepare_exception,
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.commit_exception = transient_commit_exception,
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.usage = transient_usage,
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.status = transient_status,
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};
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int dm_transient_snapshot_init(void)
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{
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int r;
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r = dm_exception_store_type_register(&_transient_type);
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if (r) {
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DMWARN("Unable to register transient exception store type");
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return r;
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}
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r = dm_exception_store_type_register(&_transient_compat_type);
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if (r) {
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DMWARN("Unable to register old-style transient exception store type");
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dm_exception_store_type_unregister(&_transient_type);
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return r;
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}
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return r;
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}
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void dm_transient_snapshot_exit(void)
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{
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dm_exception_store_type_unregister(&_transient_type);
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dm_exception_store_type_unregister(&_transient_compat_type);
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}
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