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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:37 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:37 +0000 |
commit | 94ac2ab3fff96814d7460a27a0e9d004abbd4128 (patch) | |
tree | 9a4eb8cc234b540b0f4b93363109cdd37a20540b /drivers/md/dm-vdo/indexer/config.h | |
parent | Adding debian version 6.8.12-1. (diff) | |
download | linux-94ac2ab3fff96814d7460a27a0e9d004abbd4128.tar.xz linux-94ac2ab3fff96814d7460a27a0e9d004abbd4128.zip |
Merging upstream version 6.9.2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/md/dm-vdo/indexer/config.h')
-rw-r--r-- | drivers/md/dm-vdo/indexer/config.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/md/dm-vdo/indexer/config.h b/drivers/md/dm-vdo/indexer/config.h new file mode 100644 index 0000000000..08507dc2f7 --- /dev/null +++ b/drivers/md/dm-vdo/indexer/config.h @@ -0,0 +1,124 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright 2023 Red Hat + */ + +#ifndef UDS_CONFIG_H +#define UDS_CONFIG_H + +#include "geometry.h" +#include "indexer.h" +#include "io-factory.h" + +/* + * The uds_configuration records a variety of parameters used to configure a new UDS index. Some + * parameters are provided by the client, while others are fixed or derived from user-supplied + * values. It is created when an index is created, and it is recorded in the index metadata. + */ + +enum { + DEFAULT_VOLUME_INDEX_MEAN_DELTA = 4096, + DEFAULT_CACHE_CHAPTERS = 7, + DEFAULT_SPARSE_SAMPLE_RATE = 32, + MAX_ZONES = 16, +}; + +/* A set of configuration parameters for the indexer. */ +struct uds_configuration { + /* Storage device for the index */ + struct block_device *bdev; + + /* The maximum allowable size of the index */ + size_t size; + + /* The offset where the index should start */ + off_t offset; + + /* Parameters for the volume */ + + /* The volume layout */ + struct index_geometry *geometry; + + /* Index owner's nonce */ + u64 nonce; + + /* The number of threads used to process index requests */ + unsigned int zone_count; + + /* The number of threads used to read volume pages */ + unsigned int read_threads; + + /* Size of the page cache and sparse chapter index cache in chapters */ + u32 cache_chapters; + + /* Parameters for the volume index */ + + /* The mean delta for the volume index */ + u32 volume_index_mean_delta; + + /* Sampling rate for sparse indexing */ + u32 sparse_sample_rate; +}; + +/* On-disk structure of data for a version 8.02 index. */ +struct uds_configuration_8_02 { + /* Smaller (16), Small (64) or large (256) indices */ + u32 record_pages_per_chapter; + /* Total number of chapters per volume */ + u32 chapters_per_volume; + /* Number of sparse chapters per volume */ + u32 sparse_chapters_per_volume; + /* Size of the page cache, in chapters */ + u32 cache_chapters; + /* Unused field */ + u32 unused; + /* The volume index mean delta to use */ + u32 volume_index_mean_delta; + /* Size of a page, used for both record pages and index pages */ + u32 bytes_per_page; + /* Sampling rate for sparse indexing */ + u32 sparse_sample_rate; + /* Index owner's nonce */ + u64 nonce; + /* Virtual chapter remapped from physical chapter 0 */ + u64 remapped_virtual; + /* New physical chapter which remapped chapter was moved to */ + u64 remapped_physical; +} __packed; + +/* On-disk structure of data for a version 6.02 index. */ +struct uds_configuration_6_02 { + /* Smaller (16), Small (64) or large (256) indices */ + u32 record_pages_per_chapter; + /* Total number of chapters per volume */ + u32 chapters_per_volume; + /* Number of sparse chapters per volume */ + u32 sparse_chapters_per_volume; + /* Size of the page cache, in chapters */ + u32 cache_chapters; + /* Unused field */ + u32 unused; + /* The volume index mean delta to use */ + u32 volume_index_mean_delta; + /* Size of a page, used for both record pages and index pages */ + u32 bytes_per_page; + /* Sampling rate for sparse indexing */ + u32 sparse_sample_rate; + /* Index owner's nonce */ + u64 nonce; +} __packed; + +int __must_check uds_make_configuration(const struct uds_parameters *params, + struct uds_configuration **config_ptr); + +void uds_free_configuration(struct uds_configuration *config); + +int __must_check uds_validate_config_contents(struct buffered_reader *reader, + struct uds_configuration *config); + +int __must_check uds_write_config_contents(struct buffered_writer *writer, + struct uds_configuration *config, u32 version); + +void uds_log_configuration(struct uds_configuration *config); + +#endif /* UDS_CONFIG_H */ |