fs: Drop echfs support
This commit is contained in:
mintsuki
parent
13b9a333ad
commit
ee69dacb08
@ -274,23 +274,6 @@ mbrtest.hdd:
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dd if=/dev/zero bs=1M count=0 seek=64 of=mbrtest.hdd
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echo -e "o\nn\np\n1\n2048\n\nt\n6\na\nw\n" | fdisk mbrtest.hdd -H 16 -S 63
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.PHONY: echfs-test
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echfs-test:
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$(MAKE) test-clean
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$(MAKE) test.hdd
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$(MAKE) limine-bios
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$(MAKE) limine-deploy
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$(MAKE) -C test
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echfs-utils -g -p0 test.hdd quick-format 512 > part_guid
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sed "s/@GUID@/`cat part_guid`/g" < test/limine.cfg > limine.cfg.tmp
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echfs-utils -g -p0 test.hdd import limine.cfg.tmp limine.cfg
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rm -f limine.cfg.tmp part_guid
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echfs-utils -g -p0 test.hdd import test/test.elf boot/test.elf
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echfs-utils -g -p0 test.hdd import test/bg.bmp boot/bg.bmp
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echfs-utils -g -p0 test.hdd import $(BINDIR)/limine.sys boot/limine.sys
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$(BINDIR)/limine-deploy test.hdd
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qemu-system-x86_64 -net none -smp 4 -hda test.hdd -debugcon stdio
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.PHONY: fwcfg-common fwcfg-test fwcfg-simple-test
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fwcfg-common:
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$(MAKE) test-clean
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@ -20,7 +20,6 @@ as the reference implementation for the [Limine boot protocol](/PROTOCOL.md).
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### Supported filesystems
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* ext2/3/4
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* echfs
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* FAT12/16/32
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* NTFS
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* ISO9660 (CDs/DVDs)
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@ -1,43 +0,0 @@
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#ifndef __FS__ECHFS_H__
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#define __FS__ECHFS_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include <lib/part.h>
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#include <lib/blib.h>
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struct echfs_dir_entry {
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uint64_t parent_id;
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uint8_t type;
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char name[201];
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uint64_t atime;
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uint64_t mtime;
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uint16_t perms;
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uint16_t owner;
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uint16_t group;
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uint64_t ctime;
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uint64_t payload;
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uint64_t size;
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} __attribute__((packed));
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struct echfs_file_handle {
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struct volume *part;
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uint64_t block_size;
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uint64_t block_count;
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uint64_t dir_length;
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uint64_t alloc_table_size;
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uint64_t alloc_table_offset;
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uint64_t dir_offset;
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uint64_t file_block_count;
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uint64_t *alloc_map;
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struct echfs_dir_entry dir_entry;
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};
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int echfs_check_signature(struct volume *part);
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bool echfs_get_guid(struct guid *guid, struct volume *part);
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bool echfs_open(struct echfs_file_handle *ret, struct volume *part, const char *filename);
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void echfs_read(struct echfs_file_handle *file, void *buf, uint64_t loc, uint64_t count);
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void echfs_close(struct echfs_file_handle *file);
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#endif
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@ -1,145 +0,0 @@
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#include <fs/echfs.h>
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#include <stdint.h>
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#include <lib/libc.h>
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#include <lib/blib.h>
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#include <lib/print.h>
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#include <drivers/disk.h>
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#include <stdbool.h>
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#include <mm/pmm.h>
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struct echfs_identity_table {
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uint8_t jmp[4];
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char signature[8];
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uint64_t block_count;
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uint64_t dir_length;
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uint64_t block_size;
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uint32_t reserved;
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struct guid guid;
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} __attribute__((packed));
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#define ROOT_DIR_ID (~((uint64_t)0))
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#define END_OF_CHAIN (~((uint64_t)0))
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#define FILE_TYPE 0
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#define DIR_TYPE 1
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static bool read_block(struct echfs_file_handle *file, void *buf, uint64_t block, uint64_t offset, uint64_t count) {
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return volume_read(file->part, buf, (file->alloc_map[block] * file->block_size) + offset, count);
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}
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void echfs_read(struct echfs_file_handle *file, void *buf, uint64_t loc, uint64_t count) {
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for (uint64_t progress = 0; progress < count;) {
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uint64_t block = (loc + progress) / file->block_size;
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uint64_t chunk = count - progress;
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uint64_t offset = (loc + progress) % file->block_size;
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if (chunk > file->block_size - offset)
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chunk = file->block_size - offset;
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read_block(file, buf + progress, block, offset, chunk);
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progress += chunk;
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}
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}
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int echfs_check_signature(struct volume *part) {
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struct echfs_identity_table id_table;
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volume_read(part, &id_table, 0, sizeof(struct echfs_identity_table));
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if (strncmp(id_table.signature, "_ECH_FS_", 8)) {
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return 0;
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}
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return 1;
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}
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bool echfs_get_guid(struct guid *guid, struct volume *part) {
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struct echfs_identity_table id_table;
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volume_read(part, &id_table, 0, sizeof(struct echfs_identity_table));
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if (strncmp(id_table.signature, "_ECH_FS_", 8)) {
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return false;
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}
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*guid = id_table.guid;
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return true;
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}
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void echfs_close(struct echfs_file_handle *file) {
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pmm_free(file->alloc_map, file->file_block_count * sizeof(uint64_t));
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pmm_free(file, sizeof(struct echfs_file_handle));
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}
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bool echfs_open(struct echfs_file_handle *ret, struct volume *part, const char *path) {
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ret->part = part;
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struct echfs_identity_table id_table;
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volume_read(ret->part, &id_table, 0, sizeof(struct echfs_identity_table));
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if (strncmp(id_table.signature, "_ECH_FS_", 8)) {
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print("echfs: signature invalid\n");
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return false;
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}
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ret->block_size = id_table.block_size;
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ret->block_count = id_table.block_count;
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ret->dir_length = id_table.dir_length * ret->block_size;
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ret->alloc_table_size = DIV_ROUNDUP(ret->block_count * sizeof(uint64_t), ret->block_size) * ret->block_size;
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ret->alloc_table_offset = 16 * ret->block_size;
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ret->dir_offset = ret->alloc_table_offset + ret->alloc_table_size;
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// Find the file in the root dir.
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uint64_t wanted_parent = ROOT_DIR_ID;
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bool last_elem = false;
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next:;
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char wanted_name[128];
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for (; *path == '/'; path++);
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for (int i = 0; ; i++, path++) {
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if (*path == '\0' || *path == '/') {
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if (*path == '\0')
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last_elem = true;
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wanted_name[i] = '\0';
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path++;
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break;
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}
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wanted_name[i] = *path;
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}
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for (uint64_t i = 0; i < ret->dir_length; i += sizeof(struct echfs_dir_entry)) {
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volume_read(ret->part, &ret->dir_entry, i + ret->dir_offset, sizeof(struct echfs_dir_entry));
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if (!ret->dir_entry.parent_id) {
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break;
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}
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if (!strcmp(wanted_name, ret->dir_entry.name) &&
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ret->dir_entry.parent_id == wanted_parent &&
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ret->dir_entry.type == (last_elem ? FILE_TYPE : DIR_TYPE)) {
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if (last_elem) {
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goto found;
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} else {
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wanted_parent = ret->dir_entry.payload;
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goto next;
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}
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}
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}
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return false;
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found:;
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// Load the allocation map.
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ret->file_block_count = DIV_ROUNDUP(ret->dir_entry.size, ret->block_size);
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ret->alloc_map = ext_mem_alloc(ret->file_block_count * sizeof(uint64_t));
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ret->alloc_map[0] = ret->dir_entry.payload;
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for (uint64_t i = 1; i < ret->file_block_count; i++) {
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// Read the next block.
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volume_read(ret->part,
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&ret->alloc_map[i],
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ret->alloc_table_offset + ret->alloc_map[i-1] * sizeof(uint64_t),
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sizeof(uint64_t));
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}
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return true;
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}
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@ -1,7 +1,6 @@
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#include <stddef.h>
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#include <stdint.h>
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#include <fs/file.h>
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#include <fs/echfs.h>
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#include <fs/ext2.h>
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#include <fs/fat32.h>
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#include <fs/iso9660.h>
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@ -14,9 +13,6 @@
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#include <pxe/tftp.h>
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bool fs_get_guid(struct guid *guid, struct volume *part) {
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if (echfs_check_signature(part)) {
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return echfs_get_guid(guid, part);
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}
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if (ext2_check_signature(part)) {
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return ext2_get_guid(guid, part);
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}
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@ -68,21 +64,6 @@ struct file_handle *fopen(struct volume *part, const char *filename) {
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return ret;
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}
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if (echfs_check_signature(part)) {
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struct echfs_file_handle *fd = ext_mem_alloc(sizeof(struct echfs_file_handle));
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if (!echfs_open(fd, part, filename)) {
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goto fail;
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}
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ret->fd = (void *)fd;
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ret->read = (void *)echfs_read;
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ret->close = (void *)echfs_close;
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ret->size = fd->dir_entry.size;
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return ret;
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}
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if (ext2_check_signature(part)) {
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struct ext2_file_handle *fd = ext_mem_alloc(sizeof(struct ext2_file_handle));
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