Max Wash
4598057553
this fixes an issue where pointers to ec3_tag_info would become invalid when the b_buffer containing them was resized.
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
#ifndef IMAGE_H_
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#define IMAGE_H_
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#include "status.h"
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#include "tag.h"
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#include <stddef.h>
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#include <stdint.h>
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struct b_file;
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struct b_buffer;
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struct cluster;
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struct string_table;
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struct chunk_table;
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enum ec3_tag_ioctx_mode;
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struct ec3_parameters {
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unsigned int p_cluster_size;
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unsigned int p_compression_func;
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unsigned int p_encryption_func;
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uint64_t p_ident;
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const void *p_encryption_key;
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size_t p_encryption_key_size;
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};
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struct ec3_image_info {
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unsigned short img_version;
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unsigned short img_cluster_size;
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size_t img_tag_table_offset;
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size_t img_extent_table_offset;
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size_t img_cluster_table_offset;
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size_t img_cluster_data_offset;
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unsigned int img_nr_tags;
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unsigned int img_nr_extents;
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unsigned int img_nr_cluster_groups;
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unsigned int img_encryption_function;
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unsigned int img_compression_function;
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uint64_t img_id;
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};
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struct ec3_extent_info {
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unsigned long long ex_owner;
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unsigned long ex_logical_cluster;
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unsigned long ex_physical_cluster;
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unsigned long ex_count;
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};
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enum ec3_image_ioctx_mode {
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EC3_IMAGE_IO_READ = 0x01u,
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EC3_IMAGE_IO_WRITE = 0x02u,
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EC3_IMAGE_IO_READWRITE = EC3_IMAGE_IO_READ | EC3_IMAGE_IO_WRITE,
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EC3_IMAGE_IO_TRUNCATE = 0x04u,
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};
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struct ec3_image_ioctx {
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enum ec3_image_ioctx_mode io_mode;
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struct ec3_image_info io_header;
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/* buffer of struct ec3_tag_info */
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struct b_buffer *io_tag_table;
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/* buffer of struct ec3_tag_info */
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struct b_buffer *io_extent_table;
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/* btree list of struct ec3_tag_ioctx */
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struct b_btree io_opened_tags;
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/* when reading existing images, this will reference the on-disk cluster
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* table */
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struct cluster_table io_cluster_table;
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struct b_file *io_main;
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};
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extern enum ec3_status ec3_image_ioctx_open(
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const char *path,
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const struct ec3_parameters *param,
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enum ec3_image_ioctx_mode mode,
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struct ec3_image_ioctx **out);
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extern enum ec3_status ec3_image_ioctx_close(struct ec3_image_ioctx *image);
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extern const struct ec3_image_info *ec3_image_ioctx_get_info(
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struct ec3_image_ioctx *image);
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extern const struct ec3_tag_info *ec3_image_ioctx_get_tag_info(
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struct ec3_image_ioctx *image);
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extern const struct ec3_tag_info *ec3_image_ioctx_get_tag_info_by_id(
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struct ec3_image_ioctx *image,
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uint64_t id);
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extern const struct ec3_extent_info *ec3_image_ioctx_get_extent_info(
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struct ec3_image_ioctx *image);
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extern enum ec3_status ec3_image_ioctx_open_string_table(
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struct ec3_image_ioctx *image,
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enum ec3_image_ioctx_mode mode,
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struct string_table **out);
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extern enum ec3_status ec3_image_ioctx_open_chunk_table(
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struct ec3_image_ioctx *image,
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enum ec3_image_ioctx_mode mode,
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struct chunk_table **out);
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extern enum ec3_status ec3_image_ioctx_open_tag_by_type(
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struct ec3_image_ioctx *image,
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uint32_t type,
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unsigned int index,
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enum ec3_tag_ioctx_mode mode,
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struct ec3_tag_ioctx **out);
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extern enum ec3_status ec3_image_ioctx_open_tag_by_id(
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struct ec3_image_ioctx *image,
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uint64_t id,
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enum ec3_tag_ioctx_mode mode,
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struct ec3_tag_ioctx **out);
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extern enum ec3_status ec3_image_ioctx_create_tag(
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struct ec3_image_ioctx *image,
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uint32_t type,
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uint64_t id,
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enum ec3_tag_ioctx_mode mode,
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struct ec3_tag_ioctx **out);
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extern enum ec3_status ec3_image_ioctx_cluster_logical_to_physical(
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struct ec3_image_ioctx *image,
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const struct ec3_tag_info *tag,
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size_t logical_cluster,
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size_t *out_physical_cluster);
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extern enum ec3_status ec3_image_ioctx_get_tag_nr_clusters(
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struct ec3_image_ioctx *image,
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const struct ec3_tag_info *tag,
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size_t *out_nr_cluster);
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#endif
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