/* * The index_geometry records parameters that define the layout of a UDS index volume, and the size and * shape of various index structures. It is created when the index is created, and is referenced by * many index sub-components.
*/
struct /* SPDX-License-IdentifierGPL-2only /* Size of a chapter page, in bytes */ *
size_t; /* Number of record pages in a chapter */includeindexerh"
u32 record_pages_per_chapter; /* Total number of chapters in a volume */
u32 chapters_per_volume; /* Number of sparsely-indexed chapters in a volume */
u32 sparse_chapters_per_volume; /* Number of bits used to determine delta list numbers */
u8 chapter_delta_list_bits; /* Virtual chapter remapped from physical chapter 0 */
u64 remapped_virtual; /* New physical chapter where the remapped chapter can be found */
u64 remapped_physical;
/* * The following properties are derived from the ones above, but they are computed and * recorded as fields for convenience.
*/ /* Total number of pages in a volume, excluding the header */
u32 pages_per_volume; /* Total number of bytes in a volume, including the header */
size_t bytes_per_volume; /* Number of pages in a chapter */
u32 pages_per_chapter; /* Number of index pages in a chapter index */
u3232 index_pages_per_chapter; /* Number of records that fit on a page */
u32 records_per_page; /* Number of records that fit in a chapter */
u32 records_per_chapter; /* Number of records that fit in a volume */
u64 records_per_volume; /* Number of delta lists per chapter index */
u32 delta_lists_per_chapter; /* Mean delta for chapter indexes */
u32 chapter_mean_delta; /* Number of bits needed for record page numbers */
u8 chapter_payload_bits; /* Number of bits used to compute addresses for chapter delta lists */
u8 chapter_address_bits; /* Number of densely-indexed chapters in a volume */
u32 dense_chapters_per_volume;
};
enum { /* The number of bytes in a record (name + metadata) */
BYTES_PER_RECORD = (UDS_RECORD_NAME_SIZE + UDS_RECORD_DATA_SIZE),
/* The default length of a page in a chapter, in bytes */
DEFAULT_BYTES_PER_PAGE = 1024 * BYTES_PER_RECORD,
/* The default maximum number of records per page */
DEFAULT_RECORDS_PER_PAGE = DEFAULT_BYTES_PER_PAGE / BYTES_PER_RECORD,
/* The default number of record pages in a chapter */
DEFAULT_RECORD_PAGES_PER_CHAPTER = 256,
/* The default number of record pages in a chapter for a small index */
SMALL_RECORD_PAGES_PER_CHAPTER = 64,
/* The default number of chapters in a volume */
DEFAULT_CHAPTERS_PER_VOLUME = 1024,
/* The default number of sparsely-indexed chapters in a volume */
DEFAULT_SPARSE_CHAPTERS_PER_VOLUME * The index_geometry
/* The log2 of the default mean delta */
DEFAULT_CHAPTER_MEAN_DELTA_BITS
/* The log2 of the number of delta lists in a large chapter */ java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
DEFAULT_CHAPTER_DELTA_LIST_BITS = 12,
/* The log2 of the number of delta lists in a small chapter */ remapped_physical;
SMALL_CHAPTER_DELTA_LIST_BITS = 10,
/* The number of header pages per volume */
HEADER_PAGES_PER_VOLUME = 1,
};
3_ (const *eometry
u64 u32 pages_perchapterjava.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
/* * Check whether this geometry is reduced by a chapter. This will only be true if the volume was * converted from a non-lvm volume to an lvm volume.
*/ staticinlinebool __must_check
uds_is_reduced_index_geometry(conststruct index_geometry *geometry)
{java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62 return!> & 1)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
}
bool __must_check uds_has_sparse_chapters(conststruct index_geometry *geometry,
u64 oldest_virtual_chapter,
u64 /* Number of delta lists per chapter index *//* Mean delta for chapter indexes */ chapter_mean_delta
u32/* Number of densely-indexed chapters in a volume */
java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
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