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fs: Improve layering in how the filesystem API works

This commit is contained in:
mintsuki 2022-07-04 20:16:33 +02:00
parent 1843b26078
commit 0431623381
13 changed files with 446 additions and 436 deletions
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124
common/fs/ext2.h
View File

@ -1,133 +1,13 @@
#ifndef __FS__EXT2_H__
#define __FS__EXT2_H__
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <lib/part.h>
#include <lib/blib.h>
#include <fs/file.h>
/* Superblock Fields */
struct ext2_superblock {
uint32_t s_inodes_count;
uint32_t s_blocks_count;
uint32_t s_r_blocks_count;
uint32_t s_free_blocks_count;
uint32_t s_free_inodes_count;
uint32_t s_first_data_block;
uint32_t s_log_block_size;
uint32_t s_log_frag_size;
uint32_t s_blocks_per_group;
uint32_t s_frags_per_group;
uint32_t s_inodes_per_group;
uint32_t s_mtime;
uint32_t s_wtime;
uint16_t s_mnt_count;
uint16_t s_max_mnt_count;
uint16_t s_magic;
uint16_t s_state;
uint16_t s_errors;
uint16_t s_minor_rev_level;
uint32_t s_lastcheck;
uint32_t s_checkinterval;
uint32_t s_creator_os;
uint32_t s_rev_level;
uint16_t s_def_resuid;
uint16_t s_def_gid;
// if version number >= 1, we have to use the ext2 extended superblock as well
/* Extended Superblock */
uint32_t s_first_ino;
uint16_t s_inode_size;
uint16_t s_block_group_nr;
uint32_t s_feature_compat;
uint32_t s_feature_incompat;
uint32_t s_feature_ro_compat;
uint64_t s_uuid[2];
uint8_t s_volume_name[16];
uint64_t s_last_mounted[8];
uint32_t compression_info;
uint8_t prealloc_blocks;
uint8_t prealloc_dir_blocks;
uint16_t reserved_gdt_blocks;
uint8_t journal_uuid[16];
uint32_t journal_inum;
uint32_t journal_dev;
uint32_t last_orphan;
uint32_t hash_seed[4];
uint8_t def_hash_version;
uint8_t jnl_backup_type;
uint16_t group_desc_size;
uint32_t default_mount_opts;
uint32_t first_meta_bg;
uint32_t mkfs_time;
uint32_t jnl_blocks[17];
} __attribute__((packed));
struct ext2_linux {
uint8_t frag_num;
uint8_t frag_size;
uint16_t reserved_16;
uint16_t user_id_high;
uint16_t group_id_high;
uint32_t reserved_32;
} __attribute__((packed));
struct ext2_inode {
uint16_t i_mode;
uint16_t i_uid;
uint32_t i_size;
uint32_t i_atime;
uint32_t i_ctime;
uint32_t i_mtime;
uint32_t i_dtime;
uint16_t i_gid;
uint16_t i_links_count;
uint32_t i_blocks_count;
uint32_t i_flags;
uint32_t i_osd1;
uint32_t i_blocks[15];
uint32_t i_generation;
/* EXT2 v >= 1.0 */
uint32_t i_eab;
uint32_t i_maj;
/* EXT2 vAll */
uint32_t i_frag_block;
struct ext2_linux i_osd2;
} __attribute__((packed));
struct ext2_file_handle {
struct volume *part;
struct ext2_superblock sb;
int size;
struct ext2_inode root_inode;
struct ext2_inode inode;
uint64_t block_size;
uint32_t *alloc_map;
};
int ext2_check_signature(struct volume *part);
bool ext2_get_guid(struct guid *guid, struct volume *part);
char *ext2_get_label(struct volume *part);
bool ext2_open(struct ext2_file_handle *ret, struct volume *part, const char *path);
void ext2_read(struct ext2_file_handle *file, void *buf, uint64_t loc, uint64_t count);
void ext2_close(struct ext2_file_handle *file);
struct file_handle *ext2_open(struct volume *part, const char *path);
#endif

186
common/fs/ext2.s2.c
View File

@ -8,6 +8,121 @@
#include <lib/print.h>
#include <mm/pmm.h>
/* Superblock Fields */
struct ext2_superblock {
uint32_t s_inodes_count;
uint32_t s_blocks_count;
uint32_t s_r_blocks_count;
uint32_t s_free_blocks_count;
uint32_t s_free_inodes_count;
uint32_t s_first_data_block;
uint32_t s_log_block_size;
uint32_t s_log_frag_size;
uint32_t s_blocks_per_group;
uint32_t s_frags_per_group;
uint32_t s_inodes_per_group;
uint32_t s_mtime;
uint32_t s_wtime;
uint16_t s_mnt_count;
uint16_t s_max_mnt_count;
uint16_t s_magic;
uint16_t s_state;
uint16_t s_errors;
uint16_t s_minor_rev_level;
uint32_t s_lastcheck;
uint32_t s_checkinterval;
uint32_t s_creator_os;
uint32_t s_rev_level;
uint16_t s_def_resuid;
uint16_t s_def_gid;
// if version number >= 1, we have to use the ext2 extended superblock as well
/* Extended Superblock */
uint32_t s_first_ino;
uint16_t s_inode_size;
uint16_t s_block_group_nr;
uint32_t s_feature_compat;
uint32_t s_feature_incompat;
uint32_t s_feature_ro_compat;
uint64_t s_uuid[2];
uint8_t s_volume_name[16];
uint64_t s_last_mounted[8];
uint32_t compression_info;
uint8_t prealloc_blocks;
uint8_t prealloc_dir_blocks;
uint16_t reserved_gdt_blocks;
uint8_t journal_uuid[16];
uint32_t journal_inum;
uint32_t journal_dev;
uint32_t last_orphan;
uint32_t hash_seed[4];
uint8_t def_hash_version;
uint8_t jnl_backup_type;
uint16_t group_desc_size;
uint32_t default_mount_opts;
uint32_t first_meta_bg;
uint32_t mkfs_time;
uint32_t jnl_blocks[17];
} __attribute__((packed));
struct ext2_linux {
uint8_t frag_num;
uint8_t frag_size;
uint16_t reserved_16;
uint16_t user_id_high;
uint16_t group_id_high;
uint32_t reserved_32;
} __attribute__((packed));
struct ext2_inode {
uint16_t i_mode;
uint16_t i_uid;
uint32_t i_size;
uint32_t i_atime;
uint32_t i_ctime;
uint32_t i_mtime;
uint32_t i_dtime;
uint16_t i_gid;
uint16_t i_links_count;
uint32_t i_blocks_count;
uint32_t i_flags;
uint32_t i_osd1;
uint32_t i_blocks[15];
uint32_t i_generation;
/* EXT2 v >= 1.0 */
uint32_t i_eab;
uint32_t i_maj;
/* EXT2 vAll */
uint32_t i_frag_block;
struct ext2_linux i_osd2;
} __attribute__((packed));
struct ext2_file_handle {
struct volume *part;
struct ext2_superblock sb;
int size;
struct ext2_inode root_inode;
struct ext2_inode inode;
uint64_t block_size;
uint32_t *alloc_map;
};
/* Inode types */
#define S_IFIFO 0x1000
#define S_IFCHR 0x2000
@ -314,19 +429,30 @@ out:
return ret;
}
bool ext2_open(struct ext2_file_handle *ret, struct volume *part, const char *path) {
static void ext2_read(struct file_handle *handle, void *buf, uint64_t loc, uint64_t count);
static void ext2_close(struct file_handle *file);
struct file_handle *ext2_open(struct volume *part, const char *path) {
struct ext2_file_handle *ret = ext_mem_alloc(sizeof(struct ext2_file_handle));
ret->part = part;
volume_read(ret->part, &ret->sb, 1024, sizeof(struct ext2_superblock));
struct ext2_superblock *sb = &ret->sb;
if (sb->s_magic != EXT2_S_MAGIC) {
pmm_free(ret, sizeof(struct ext2_file_handle));
return NULL;
}
if (sb->s_rev_level != 0 &&
(sb->s_feature_incompat & EXT2_IF_COMPRESSION ||
sb->s_feature_incompat & EXT2_IF_INLINE_DATA ||
sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)) {
print("ext2: filesystem has unsupported features %x\n", sb->s_feature_incompat);
return false;
pmm_free(ret, sizeof(struct ext2_file_handle));
return NULL;
}
if (sb->s_rev_level != 0 && sb->s_feature_incompat & EXT2_IF_ENCRYPT) {
@ -335,7 +461,8 @@ bool ext2_open(struct ext2_file_handle *ret, struct volume *part, const char *pa
if (sb->s_state == EXT2_FS_UNRECOVERABLE_ERRORS) {
print("ext2: unrecoverable errors found\n");
return false;
pmm_free(ret, sizeof(struct ext2_file_handle));
return NULL;
}
ret->block_size = ((uint64_t)1024 << ret->sb.s_log_block_size);
@ -344,18 +471,23 @@ bool ext2_open(struct ext2_file_handle *ret, struct volume *part, const char *pa
struct ext2_dir_entry entry;
if (!ext2_parse_dirent(&entry, ret, path))
return false;
if (!ext2_parse_dirent(&entry, ret, path)) {
pmm_free(ret, sizeof(struct ext2_file_handle));
return NULL;
}
ext2_get_inode(&ret->inode, ret, entry.inode);
while ((ret->inode.i_mode & FMT_MASK) != S_IFREG) {
if ((ret->inode.i_mode & FMT_MASK) == S_IFLNK) {
if (!symlink_to_inode(&ret->inode, ret))
return false;
if (!symlink_to_inode(&ret->inode, ret)) {
pmm_free(ret, sizeof(struct ext2_file_handle));
return NULL;
}
} else {
print("ext2: Entity is not regular file nor symlink\n");
return false;
pmm_free(ret, sizeof(struct ext2_file_handle));
return NULL;
}
}
@ -363,18 +495,32 @@ bool ext2_open(struct ext2_file_handle *ret, struct volume *part, const char *pa
ret->alloc_map = create_alloc_map(ret, &ret->inode);
return true;
struct file_handle *handle = ext_mem_alloc(sizeof(struct file_handle));
handle->fd = ret;
handle->read = (void *)ext2_read;
handle->close = (void *)ext2_close;
handle->size = ret->size;
handle->vol = part;
#if uefi == 1
handle->efi_part_handle = part->efi_part_handle;
#endif
return handle;
}
void ext2_close(struct ext2_file_handle *file) {
if (file->alloc_map != NULL) {
pmm_free(file->alloc_map, file->inode.i_blocks_count * sizeof(uint32_t));
static void ext2_close(struct file_handle *file) {
struct ext2_file_handle *f = file->fd;
if (f->alloc_map != NULL) {
pmm_free(f->alloc_map, f->inode.i_blocks_count * sizeof(uint32_t));
}
pmm_free(file, sizeof(struct ext2_file_handle));
pmm_free(f, sizeof(struct ext2_file_handle));
pmm_free(file, sizeof(struct file_handle));
}
void ext2_read(struct ext2_file_handle *file, void *buf, uint64_t loc, uint64_t count) {
inode_read(buf, loc, count, &file->inode, file, file->alloc_map);
static void ext2_read(struct file_handle *file, void *buf, uint64_t loc, uint64_t count) {
struct ext2_file_handle *f = file->fd;
inode_read(buf, loc, count, &f->inode, f, f->alloc_map);
}
static struct ext4_extent_header *ext4_find_leaf(struct ext4_extent_header *ext_block, uint32_t read_block, uint64_t block_size, struct volume *part) {
@ -466,16 +612,6 @@ static int inode_read(void *buf, uint64_t loc, uint64_t count,
return 0;
}
int ext2_check_signature(struct volume *part) {
struct ext2_superblock sb;
volume_read(part, &sb, 1024, sizeof(struct ext2_superblock));
if (sb.s_magic != EXT2_S_MAGIC)
return 0;
return 1;
}
bool ext2_get_guid(struct guid *guid, struct volume *part) {
struct ext2_superblock sb;
volume_read(part, &sb, 1024, sizeof(struct ext2_superblock));

34
common/fs/fat32.h
View File

@ -1,41 +1,11 @@
#ifndef __FS__FAT32_H__
#define __FS__FAT32_H__
#include <stdint.h>
#include <lib/part.h>
#include <fs/file.h>
struct fat32_context {
struct volume *part;
int type;
char label[12];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t number_of_fats;
uint32_t hidden_sectors;
uint32_t sectors_per_fat;
uint32_t fat_start_lba;
uint32_t data_start_lba;
uint32_t root_directory_cluster;
uint16_t root_entries;
uint32_t root_start;
uint32_t root_size;
};
struct fat32_file_handle {
struct fat32_context context;
uint32_t first_cluster;
uint32_t size_bytes;
uint32_t size_clusters;
uint32_t *cluster_chain;
size_t chain_len;
};
int fat32_check_signature(struct volume *part);
char *fat32_get_label(struct volume *part);
bool fat32_open(struct fat32_file_handle *ret, struct volume *part, const char *path);
void fat32_read(struct fat32_file_handle *file, void *buf, uint64_t loc, uint64_t count);
void fat32_close(struct fat32_file_handle *file);
struct file_handle *fat32_open(struct volume *part, const char *path);
#endif

70
common/fs/fat32.s2.c
View File

@ -12,6 +12,33 @@
#define FAT32_ATTRIBUTE_SUBDIRECTORY 0x10
#define FAT32_LFN_ATTRIBUTE 0x0F
struct fat32_context {
struct volume *part;
int type;
char label[12];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t number_of_fats;
uint32_t hidden_sectors;
uint32_t sectors_per_fat;
uint32_t fat_start_lba;
uint32_t data_start_lba;
uint32_t root_directory_cluster;
uint16_t root_entries;
uint32_t root_start;
uint32_t root_size;
};
struct fat32_file_handle {
struct fat32_context context;
uint32_t first_cluster;
uint32_t size_bytes;
uint32_t size_clusters;
uint32_t *cluster_chain;
size_t chain_len;
};
struct fat32_bpb {
union {
struct {
@ -366,11 +393,6 @@ out:
return ret;
}
int fat32_check_signature(struct volume *part) {
struct fat32_context context;
return fat32_init_context(&context, part) == 0;
}
char *fat32_get_label(struct volume *part) {
struct fat32_context context;
if (fat32_init_context(&context, part) != 0) {
@ -388,13 +410,15 @@ char *fat32_get_label(struct volume *part) {
return ret;
}
bool fat32_open(struct fat32_file_handle* ret, struct volume *part, const char* path) {
static void fat32_read(struct file_handle *handle, void *buf, uint64_t loc, uint64_t count);
static void fat32_close(struct file_handle *file);
struct file_handle *fat32_open(struct volume *part, const char *path) {
struct fat32_context context;
int r = fat32_init_context(&context, part);
if (r) {
print("fat32: context init failure (%d)\n", r);
return false;
return NULL;
}
struct fat32_directory_entry _current_directory;
@ -444,13 +468,16 @@ bool fat32_open(struct fat32_file_handle* ret, struct volume *part, const char*
}
if ((r = fat32_open_in(&context, current_directory, &current_file, current_part)) != 0) {
return false;
return NULL;
}
if (expect_directory) {
_current_directory = current_file;
current_directory = &_current_directory;
} else {
struct file_handle *handle = ext_mem_alloc(sizeof(struct file_handle));
struct fat32_file_handle *ret = ext_mem_alloc(sizeof(struct fat32_file_handle));
ret->context = context;
ret->first_cluster = current_file.cluster_num_low;
if (context.type == 32)
@ -458,16 +485,29 @@ bool fat32_open(struct fat32_file_handle* ret, struct volume *part, const char*
ret->size_clusters = DIV_ROUNDUP(current_file.file_size_bytes, context.bytes_per_sector);
ret->size_bytes = current_file.file_size_bytes;
ret->cluster_chain = cache_cluster_chain(&context, ret->first_cluster, &ret->chain_len);
return true;
handle->fd = (void *)ret;
handle->read = (void *)fat32_read;
handle->close = (void *)fat32_close;
handle->size = ret->size_bytes;
handle->vol = part;
#if uefi == 1
handle->efi_part_handle = part->efi_part_handle;
#endif
return handle;
}
}
}
void fat32_read(struct fat32_file_handle* file, void* buf, uint64_t loc, uint64_t count) {
read_cluster_chain(&file->context, file->cluster_chain, buf, loc, count);
static void fat32_read(struct file_handle *file, void *buf, uint64_t loc, uint64_t count) {
struct fat32_file_handle *f = file->fd;
read_cluster_chain(&f->context, f->cluster_chain, buf, loc, count);
}
void fat32_close(struct fat32_file_handle *file) {
pmm_free(file->cluster_chain, file->chain_len * sizeof(uint32_t));
pmm_free(file, sizeof(struct fat32_file_handle));
static void fat32_close(struct file_handle *file) {
struct fat32_file_handle *f = file->fd;
pmm_free(f->cluster_chain, f->chain_len * sizeof(uint32_t));
pmm_free(f, sizeof(struct fat32_file_handle));
pmm_free(file, sizeof(struct file_handle));
}

110
common/fs/file.s2.c
View File

@ -13,115 +13,55 @@
#include <pxe/tftp.h>
char *fs_get_label(struct volume *part) {
if (fat32_check_signature(part)) {
return fat32_get_label(part);
char *ret;
if ((ret = fat32_get_label(part)) != NULL) {
return ret;
}
if (ext2_check_signature(part)) {
return ext2_get_label(part);
if ((ret = ext2_get_label(part)) != NULL) {
return ret;
}
return NULL;
}
bool fs_get_guid(struct guid *guid, struct volume *part) {
if (ext2_check_signature(part)) {
return ext2_get_guid(guid, part);
if (ext2_get_guid(guid, part) == true) {
return true;
}
return false;
}
struct file_handle *fopen(struct volume *part, const char *filename) {
struct file_handle *ret = ext_mem_alloc(sizeof(struct file_handle));
ret->is_memfile = false;
ret->readall = false;
ret->vol = part;
if (strlen(filename) + 2 > PATH_MAX) {
panic(true, "fopen: Path too long");
}
ret->path[0] = '/';
strcpy(ret->path + 1, filename);
struct file_handle *ret;
#if bios == 1
if (part->pxe) {
if (!tftp_open(ret, 0, 69, filename)) {
goto fail;
if ((ret = tftp_open(0, 69, filename)) == NULL) {
return NULL;
}
return ret;
}
#endif
#if uefi == 1
ret->efi_part_handle = part->efi_part_handle;
#endif
if (iso9660_check_signature(part)) {
struct iso9660_file_handle *fd = ext_mem_alloc(sizeof(struct iso9660_file_handle));
if (!iso9660_open(fd, part, filename)) {
goto fail;
}
ret->fd = (void *)fd;
ret->read = (void *)iso9660_read;
ret->close = (void *)iso9660_close;
ret->size = fd->size;
if ((ret = ext2_open(part, filename)) != NULL) {
return ret;
}
if ((ret = fat32_open(part, filename)) != NULL) {
return ret;
}
if ((ret = iso9660_open(part, filename)) != NULL) {
return ret;
}
if ((ret = ntfs_open(part, filename)) != NULL) {
return ret;
}
if (ext2_check_signature(part)) {
struct ext2_file_handle *fd = ext_mem_alloc(sizeof(struct ext2_file_handle));
if (!ext2_open(fd, part, filename)) {
goto fail;
}
ret->fd = (void *)fd;
ret->read = (void *)ext2_read;
ret->close = (void *)ext2_close;
ret->size = fd->size;
return ret;
}
if (fat32_check_signature(part)) {
struct fat32_file_handle *fd = ext_mem_alloc(sizeof(struct fat32_file_handle));
if (!fat32_open(fd, part, filename)) {
goto fail;
}
ret->fd = (void *)fd;
ret->read = (void *)fat32_read;
ret->close = (void *)fat32_close;
ret->size = fd->size_bytes;
return ret;
}
if (ntfs_check_signature(part)) {
struct ntfs_file_handle *fd = ext_mem_alloc(sizeof(struct ntfs_file_handle));
if (!ntfs_open(fd, part, filename)) {
goto fail;
}
ret->fd = (void *)fd;
ret->read = (void *)ntfs_read;
ret->close = (void *)ntfs_close;
ret->size = fd->size_bytes;
return ret;
}
fail:
pmm_free(ret, sizeof(struct file_handle));
return NULL;
}
@ -130,17 +70,17 @@ void fclose(struct file_handle *fd) {
if (fd->readall == false) {
pmm_free(fd->fd, fd->size);
}
pmm_free(fd, sizeof(struct file_handle));
} else {
fd->close(fd->fd);
fd->close(fd);
}
pmm_free(fd, sizeof(struct file_handle));
}
void fread(struct file_handle *fd, void *buf, uint64_t loc, uint64_t count) {
if (fd->is_memfile) {
memcpy(buf, fd->fd + loc, count);
} else {
fd->read(fd->fd, buf, loc, count);
fd->read(fd, buf, loc, count);
}
}
@ -154,7 +94,7 @@ void *freadall(struct file_handle *fd, uint32_t type) {
return fd->fd;
} else {
void *ret = ext_mem_alloc_type(fd->size, type);
fd->read(fd->fd, ret, 0, fd->size);
fd->read(fd, ret, 0, fd->size);
return ret;
}
}

20
common/fs/iso9660.h
View File

@ -3,24 +3,8 @@
#include <stdint.h>
#include <lib/part.h>
#include <fs/file.h>
#define ISO9660_SECTOR_SIZE (2 << 10)
struct iso9660_context {
struct volume *vol;
void* root;
uint32_t root_size;
};
struct iso9660_file_handle {
struct iso9660_context *context;
uint32_t LBA;
uint32_t size;
};
int iso9660_check_signature(struct volume *vol);
bool iso9660_open(struct iso9660_file_handle *ret, struct volume *vol, const char *path);
void iso9660_read(struct iso9660_file_handle *file, void *buf, uint64_t loc, uint64_t count);
void iso9660_close(struct iso9660_file_handle *file);
struct file_handle *iso9660_open(struct volume *vol, const char *path);
#endif

57
common/fs/iso9660.s2.c
View File

@ -3,6 +3,20 @@
#include <lib/libc.h>
#include <mm/pmm.h>
#define ISO9660_SECTOR_SIZE (2 << 10)
struct iso9660_context {
struct volume *vol;
void *root;
uint32_t root_size;
};
struct iso9660_file_handle {
struct iso9660_context *context;
uint32_t LBA;
uint32_t size;
};
#define ISO9660_FIRST_VOLUME_DESCRIPTOR 0x10
#define ISO9660_VOLUME_DESCRIPTOR_SIZE ISO9660_SECTOR_SIZE
#define ROCK_RIDGE_MAX_FILENAME 255
@ -198,17 +212,20 @@ static struct iso9660_directory_entry *iso9660_find(void *buffer, uint32_t size,
return NULL;
}
static void iso9660_read(struct file_handle *handle, void *buf, uint64_t loc, uint64_t count);
static void iso9660_close(struct file_handle *file);
// --- Public functions ---
int iso9660_check_signature(struct volume *vol) {
struct file_handle *iso9660_open(struct volume *vol, const char *path) {
char buf[6];
const uint64_t signature = ISO9660_FIRST_VOLUME_DESCRIPTOR * ISO9660_SECTOR_SIZE + 1;
volume_read(vol, buf, signature, 5);
buf[5] = '\0';
return !strcmp(buf, "CD001");
}
if (strcmp(buf, "CD001") != 0) {
return NULL;
}
struct iso9660_file_handle *ret = ext_mem_alloc(sizeof(struct iso9660_file_handle));
bool iso9660_open(struct iso9660_file_handle *ret, struct volume *vol, const char *path) {
ret->context = iso9660_get_context(vol);
while (*path == '/')
@ -230,8 +247,10 @@ bool iso9660_open(struct iso9660_file_handle *ret, struct volume *vol, const cha
*aux = '\0';
struct iso9660_directory_entry *entry = iso9660_find(current, current_size, filename);
if (!entry)
return false; // Not found :(
if (!entry) {
pmm_free(ret, sizeof(struct iso9660_file_handle));
return NULL; // Not found :(
}
next_sector = entry->extent.little;
next_size = entry->extent_size.little;
@ -253,13 +272,27 @@ bool iso9660_open(struct iso9660_file_handle *ret, struct volume *vol, const cha
ret->LBA = next_sector;
ret->size = next_size;
return true;
struct file_handle *handle = ext_mem_alloc(sizeof(struct file_handle));
handle->fd = ret;
handle->read = (void *)iso9660_read;
handle->close = (void *)iso9660_close;
handle->size = ret->size;
handle->vol = vol;
#if uefi == 1
handle->efi_part_handle = vol->efi_part_handle;
#endif
return handle;
}
void iso9660_read(struct iso9660_file_handle *file, void *buf, uint64_t loc, uint64_t count) {
volume_read(file->context->vol, buf, file->LBA * ISO9660_SECTOR_SIZE + loc, count);
static void iso9660_read(struct file_handle *file, void *buf, uint64_t loc, uint64_t count) {
struct iso9660_file_handle *f = file->fd;
volume_read(f->context->vol, buf, f->LBA * ISO9660_SECTOR_SIZE + loc, count);
}
void iso9660_close(struct iso9660_file_handle *file) {
pmm_free(file, sizeof(struct iso9660_file_handle));
static void iso9660_close(struct file_handle *file) {
pmm_free(file->fd, sizeof(struct iso9660_file_handle));
pmm_free(file, sizeof(struct file_handle));
}

67
common/fs/ntfs.h
View File

@ -1,72 +1,9 @@
#ifndef __FS__NTFS_H__
#define __FS__NTFS_H__
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <lib/part.h>
#include <lib/blib.h>
#include <fs/file.h>
struct ntfs_bpb {
uint8_t jump[3];
char oem[8];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t fats_count;
uint16_t directory_entries_count;
uint16_t sector_totals;
uint8_t media_descriptor_type;
uint16_t sectors_per_fat_16;
uint16_t sectors_per_track;
uint16_t heads_count;
uint32_t hidden_sectors_count;
uint32_t large_sectors_count;
// ntfs
uint32_t sectors_per_fat_32;
uint64_t sectors_count_64;
uint64_t mft_cluster;
} __attribute__((packed));
struct ntfs_file_handle {
struct volume *part;
struct ntfs_bpb bpb;
// file record sizes
uint64_t file_record_size;
uint64_t sectors_per_file_record;
// MFT info, the offset and its runlist
uint64_t mft_offset;
uint8_t mft_run_list[256];
// the runlist of the open file/directory
uint8_t run_list[128];
// The resident index, only for directories,
// could be at the same time as a runlist
uint8_t resident_index_size;
// the resident data
uint8_t resident_data_size;
// we are using a union just for having different names, these
// won't have need to be used at the same time
union {
uint8_t resident_index[1024];
uint8_t resident_data[1024];
};
// info about the current file
uint32_t size_bytes;
};
int ntfs_check_signature(struct volume *part);
bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *path);
int ntfs_read(struct ntfs_file_handle *file, void *buf, uint64_t loc, uint64_t count);
void ntfs_close(struct ntfs_file_handle *file);
struct file_handle *ntfs_open(struct volume *part, const char *path);
#endif

185
common/fs/ntfs.s2.c
View File

@ -1,12 +1,71 @@
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <fs/ntfs.h>
#include <mm/pmm.h>
#include <lib/print.h>
#include <stdbool.h>
#include <lib/libc.h>
#include <lib/blib.h>
// created using documentation from:
// https://dubeyko.com/development/FileSystems/NTFS/ntfsdoc.pdf
struct ntfs_bpb {
uint8_t jump[3];
char oem[8];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t fats_count;
uint16_t directory_entries_count;
uint16_t sector_totals;
uint8_t media_descriptor_type;
uint16_t sectors_per_fat_16;
uint16_t sectors_per_track;
uint16_t heads_count;
uint32_t hidden_sectors_count;
uint32_t large_sectors_count;
// ntfs
uint32_t sectors_per_fat_32;
uint64_t sectors_count_64;
uint64_t mft_cluster;
} __attribute__((packed));
struct ntfs_file_handle {
struct volume *part;
struct ntfs_bpb bpb;
// file record sizes
uint64_t file_record_size;
uint64_t sectors_per_file_record;
// MFT info, the offset and its runlist
uint64_t mft_offset;
uint8_t mft_run_list[256];
// the runlist of the open file/directory
uint8_t run_list[128];
// The resident index, only for directories,
// could be at the same time as a runlist
uint8_t resident_index_size;
// the resident data
uint8_t resident_data_size;
// we are using a union just for having different names, these
// won't have need to be used at the same time
union {
uint8_t resident_index[1024];
uint8_t resident_data[1024];
};
// info about the current file
uint32_t size_bytes;
};
// This is the total size of a file record, including the attributes
// TODO: calculate this
#define MIN_FILE_RECORD_SIZE 1024
@ -121,36 +180,6 @@ struct index_entry {
uint16_t name[];
} __attribute__((packed));
int ntfs_check_signature(struct volume *part) {
struct ntfs_bpb bpb;
if (!volume_read(part, &bpb, 0, sizeof(bpb))) {
return 0;
}
//
// validate the bpb
//
if (strncmp(bpb.oem, "NTFS ", SIZEOF_ARRAY(bpb.oem))) {
return 0;
}
if (bpb.sector_totals != 0) {
return 0;
}
if (bpb.large_sectors_count != 0) {
return 0;
}
if (bpb.sectors_count_64 == 0) {
return 0;
}
// this is a valid ntfs sector
return 1;
}
// the temp buffer is used for storing dirs and alike
// in memory, because limine only has allocate without
// free we are going to allocate it once globally and just
@ -159,6 +188,10 @@ static uint8_t *dir_buffer = NULL;
static size_t dir_buffer_size = 0;
static size_t dir_buffer_cap = 0;
// XXX ugly hack due to broken layering
static int ntfs_read(struct file_handle *handle, void *buf, uint64_t loc, uint64_t count);
static void ntfs_close(struct file_handle *file);
/**
* Get an attribute from the given file record
*/
@ -377,10 +410,14 @@ static bool ntfs_read_directory(struct ntfs_file_handle *handle, uint64_t mft_re
dir_buffer_size = dir_size;
// read the directory
if (ntfs_read(handle, dir_buffer, 0, dir_size)) {
// XXX ugly hack due to broken layering
{
struct file_handle h = { .fd = handle };
if (ntfs_read(&h, dir_buffer, 0, dir_size)) {
print("NTFS: EOF before reading directory fully...\n");
return false;
}
}
} else {
// if no runlist then empty the runlist
memset(handle->run_list, 0, sizeof(handle->run_list));
@ -546,14 +583,41 @@ static bool ntfs_find_file_in_directory(struct ntfs_file_handle *handle, const c
return false;
}
bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *path) {
struct file_handle *ntfs_open(struct volume *part, const char *path) {
struct ntfs_file_handle *ret = ext_mem_alloc(sizeof(struct ntfs_file_handle));
// save the part
ret->part = part;
// start by reading the bpb so we can access it later on
if (!volume_read(part, &ret->bpb, 0, sizeof(ret->bpb))) {
print("NTFS: Failed to read the BPB\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
//
// validate the bpb
//
if (strncmp(ret->bpb.oem, "NTFS ", SIZEOF_ARRAY(ret->bpb.oem))) {
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
if (ret->bpb.sector_totals != 0) {
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
if (ret->bpb.large_sectors_count != 0) {
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
if (ret->bpb.sectors_count_64 == 0) {
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
// in NTFS sector size can be 512 to 4096 bytes, file records are
@ -570,13 +634,15 @@ bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *pa
}
if (ret->file_record_size != MIN_FILE_RECORD_SIZE) {
print("NTFS: TODO: support file record size which is not 1024 bytes\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
// now prepare the root directory so we can search for
// the rest of the stuff
if (!ntfs_read_root(ret)) {
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
// iterate the directories to find the entry
@ -590,8 +656,10 @@ bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *pa
// find the file in the directory
entry = NULL;
if (!ntfs_find_file_in_directory(ret, current_path, &entry))
return false;
if (!ntfs_find_file_in_directory(ret, current_path, &entry)) {
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
size_t filename_len = entry->name_length;
@ -604,14 +672,16 @@ bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *pa
// get its runlist...
if (!ntfs_get_file_record(ret, entry->mft_record, file_record_buffer)) {
print("NTFS: Failed to get file record of file\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
// get the file attribute
uint8_t *attr_ptr = NULL;
if (!ntfs_get_file_record_attr(file_record_buffer, FR_ATTRIBUTE_DATA, &attr_ptr)) {
print("NTFS: File record missing DATA attribute\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
struct file_record_attr_header *attr_hdr = (struct file_record_attr_header *)attr_ptr;
@ -625,11 +695,13 @@ bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *pa
// verify the attr and run list are in the buffer
if ((uint8_t *)attr + sizeof(*attr) > file_record_buffer + sizeof(file_record_buffer)) {
print("NTFS: File record attribute is outside of file record\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
if ((uint8_t *)attr + attr->run_offset + 256 > file_record_buffer + sizeof(file_record_buffer)) {
print("NTFS: Run list is outside of file record\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
// save the run list
@ -640,20 +712,32 @@ bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *pa
if (attr->info_length > sizeof(ret->resident_data)) {
print("NTFS: Resident data too big\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
ret->resident_data_size = attr->info_length;
memcpy(ret->resident_data, attr + 1, attr->info_length);
}
return true;
struct file_handle *handle = ext_mem_alloc(sizeof(struct file_handle));
handle->fd = ret;
handle->read = (void *)ntfs_read;
handle->close = (void *)ntfs_close;
handle->size = ret->size_bytes;
handle->vol = part;
#if uefi == 1
handle->efi_part_handle = part->efi_part_handle;
#endif
return handle;
} else {
// read the directory
if (!ntfs_read_directory(ret, entry->mft_record, file_record_buffer)) {
print("NTFS: Failed to read directory\n");
return false;
pmm_free(ret, sizeof(struct ntfs_file_handle));
return NULL;
}
// next path element
@ -665,7 +749,9 @@ bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *pa
__builtin_unreachable();
}
int ntfs_read(struct ntfs_file_handle *file, void *buf, uint64_t loc, uint64_t count) {
static int ntfs_read(struct file_handle *handle, void *buf, uint64_t loc, uint64_t count) {
struct ntfs_file_handle *file = handle->fd;
// get the runlist
uint8_t *runlist = file->run_list;
@ -737,6 +823,7 @@ int ntfs_read(struct ntfs_file_handle *file, void *buf, uint64_t loc, uint64_t c
return count != 0;
}
void ntfs_close(struct ntfs_file_handle *file) {
pmm_free(file, sizeof(struct ntfs_file_handle));
static void ntfs_close(struct file_handle *file) {
pmm_free(file->fd, sizeof(struct ntfs_file_handle));
pmm_free(file, sizeof(struct file_handle));
}

8
common/lib/config.c
View File

@ -40,15 +40,15 @@ int init_config_disk(struct volume *part) {
#if bios == 1
int init_config_pxe(void) {
struct file_handle f;
if (tftp_open(&f, 0, 69, "limine.cfg")) {
struct file_handle *f;
if ((f = tftp_open(0, 69, "limine.cfg")) == NULL) {
return -1;
}
size_t config_size = f.size + 2;
size_t config_size = f->size + 2;
config_addr = ext_mem_alloc(config_size);
fread(&f, config_addr, 0, f.size);
fread(f, config_addr, 0, f->size);
return init_config(config_size);
}

4
common/lib/uri.c
View File

@ -162,8 +162,8 @@ static struct file_handle *uri_tftp_dispatch(char *root, char *path) {
}
}
struct file_handle *ret = ext_mem_alloc(sizeof(struct file_handle));
if (!tftp_open(ret, ip, 69, path)) {
struct file_handle *ret;
if ((ret = tftp_open(ip, 69, path)) == NULL) {
return NULL;
}

2
common/pxe/tftp.h
View File

@ -38,7 +38,7 @@ struct pxenv_get_file_size {
#define TFTP_CLOSE 0x21
//server_ip and server_port can be 0 for default
bool tftp_open(struct file_handle *handle, uint32_t server_ip, uint16_t server_port, const char *name);
struct file_handle *tftp_open(uint32_t server_ip, uint16_t server_port, const char *name);
uint32_t get_boot_server_info(void);

13
common/pxe/tftp.s2.c
View File

@ -16,7 +16,7 @@ uint32_t get_boot_server_info(void) {
return ph->sip;
}
bool tftp_open(struct file_handle *handle, uint32_t server_ip, uint16_t server_port, const char *name) {
struct file_handle *tftp_open(uint32_t server_ip, uint16_t server_port, const char *name) {
int ret = 0;
if (!server_ip) {
@ -26,7 +26,7 @@ bool tftp_open(struct file_handle *handle, uint32_t server_ip, uint16_t server_p
struct PXENV_UNDI_GET_INFORMATION undi_info = { 0 };
ret = pxe_call(UNDI_GET_INFORMATION, ((uint16_t)rm_seg(&undi_info)), (uint16_t)rm_off(&undi_info));
if (ret) {
return false;
return NULL;
}
//TODO figure out a more proper way to do this.
@ -39,9 +39,11 @@ bool tftp_open(struct file_handle *handle, uint32_t server_ip, uint16_t server_p
strcpy((char*)fsize.name, name);
ret = pxe_call(TFTP_GET_FILE_SIZE, ((uint16_t)rm_seg(&fsize)), (uint16_t)rm_off(&fsize));
if (ret) {
return false;
return NULL;
}
struct file_handle *handle = ext_mem_alloc(sizeof(struct file_handle));
handle->size = fsize.file_size;
handle->is_memfile = true;
@ -60,7 +62,8 @@ bool tftp_open(struct file_handle *handle, uint32_t server_ip, uint16_t server_p
ret = pxe_call(TFTP_OPEN, ((uint16_t)rm_seg(&open)), (uint16_t)rm_off(&open));
if (ret) {
print("tftp: Failed to open file %x or bad packet size", open.status);
return false;
pmm_free(handle, sizeof(struct file_handle));
return NULL;
}
mtu = open.packet_size;
@ -100,7 +103,7 @@ bool tftp_open(struct file_handle *handle, uint32_t server_ip, uint16_t server_p
pmm_free(buf, mtu);
return true;
return handle;
}
#endif