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Copy ext2 inode data using the size of the structure.

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This commit is contained in:
Enrico Fraccaroli
2022-08-24 10:23:39 -04:00
parent df8936cad0
commit d021526210
1 changed files with 81 additions and 51 deletions
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mentos/src/fs/ext2.c
+81 -51
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@@ -10,7 +10,7 @@
/// Change the header.
#define __DEBUG_HEADER__ "[EXT2 ]"
/// Set the log level.
#define __DEBUG_LEVEL__ LOGLEVEL_NOTICE
#define __DEBUG_LEVEL__ LOGLEVEL_DEBUG
#include "process/scheduler.h"
#include "process/process.h"
@@ -430,6 +430,28 @@ static const char *uuid_to_string(uint8_t uuid[16])
return s;
}
/// @brief Turns an ext2_file_type to string.
/// @param ext2_type the ext2_file_type to turn to string.
/// @return the string representing the ext2_file_type.
static const char *ext2_file_type_to_string(ext2_file_type_t ext2_type)
{
if (ext2_type == ext2_file_type_regular_file)
return "regular_file";
if (ext2_type == ext2_file_type_directory)
return "directory";
if (ext2_type == ext2_file_type_character_device)
return "character_device";
if (ext2_type == ext2_file_type_block_device)
return "block_device";
if (ext2_type == ext2_file_type_named_pipe)
return "named_pipe";
if (ext2_type == ext2_file_type_socket)
return "socket";
if (ext2_type == ext2_file_type_symbolic_link)
return "symbolic_link";
return "unknown";
}
static int ext2_file_type_to_vfs_file_type(int ext2_type)
{
if (ext2_type == ext2_file_type_regular_file)
@@ -502,63 +524,63 @@ static bool_t ext2_valid_permissions(int flags, mode_t mask, uid_t uid, gid_t gi
/// @param sb the object to dump.
static void ext2_dump_superblock(ext2_superblock_t *sb)
{
pr_debug("inodes_count : %d\n", sb->inodes_count);
pr_debug("blocks_count : %d\n", sb->blocks_count);
pr_debug("r_blocks_count : %d\n", sb->r_blocks_count);
pr_debug("free_blocks_count : %d\n", sb->free_blocks_count);
pr_debug("free_inodes_count : %d\n", sb->free_inodes_count);
pr_debug("first_data_block : %d\n", sb->first_data_block);
pr_debug("log_block_size : %d\n", sb->log_block_size);
pr_debug("log_frag_size : %d\n", sb->log_frag_size);
pr_debug("blocks_per_group : %d\n", sb->blocks_per_group);
pr_debug("frags_per_group : %d\n", sb->frags_per_group);
pr_debug("inodes_per_group : %d\n", sb->inodes_per_group);
pr_debug("inodes_count : %u\n", sb->inodes_count);
pr_debug("blocks_count : %u\n", sb->blocks_count);
pr_debug("r_blocks_count : %u\n", sb->r_blocks_count);
pr_debug("free_blocks_count : %u\n", sb->free_blocks_count);
pr_debug("free_inodes_count : %u\n", sb->free_inodes_count);
pr_debug("first_data_block : %u\n", sb->first_data_block);
pr_debug("log_block_size : %u\n", sb->log_block_size);
pr_debug("log_frag_size : %u\n", sb->log_frag_size);
pr_debug("blocks_per_group : %u\n", sb->blocks_per_group);
pr_debug("frags_per_group : %u\n", sb->frags_per_group);
pr_debug("inodes_per_group : %u\n", sb->inodes_per_group);
pr_debug("mtime : %s\n", time_to_string(sb->mtime));
pr_debug("wtime : %s\n", time_to_string(sb->wtime));
pr_debug("mnt_count : %d\n", sb->mnt_count);
pr_debug("max_mnt_count : %d\n", sb->max_mnt_count);
pr_debug("magic : 0x%0x\n", sb->magic);
pr_debug("magic : 0x%0x (== 0x%0x)\n", sb->magic, EXT2_SUPERBLOCK_MAGIC);
pr_debug("state : %d\n", sb->state);
pr_debug("errors : %d\n", sb->errors);
pr_debug("minor_rev_level : %d\n", sb->minor_rev_level);
pr_debug("lastcheck : %s\n", time_to_string(sb->lastcheck));
pr_debug("checkinterval : %d\n", sb->checkinterval);
pr_debug("creator_os : %d\n", sb->creator_os);
pr_debug("rev_level : %d\n", sb->rev_level);
pr_debug("def_resuid : %d\n", sb->def_resuid);
pr_debug("def_resgid : %d\n", sb->def_resgid);
pr_debug("first_ino : %d\n", sb->first_ino);
pr_debug("inode_size : %d\n", sb->inode_size);
pr_debug("block_group_nr : %d\n", sb->block_group_nr);
pr_debug("feature_compat : %d\n", sb->feature_compat);
pr_debug("feature_incompat : %d\n", sb->feature_incompat);
pr_debug("feature_ro_compat : %d\n", sb->feature_ro_compat);
pr_debug("checkinterval : %u\n", sb->checkinterval);
pr_debug("creator_os : %u\n", sb->creator_os);
pr_debug("rev_level : %u\n", sb->rev_level);
pr_debug("def_resuid : %u\n", sb->def_resuid);
pr_debug("def_resgid : %u\n", sb->def_resgid);
pr_debug("first_ino : %u\n", sb->first_ino);
pr_debug("inode_size : %u\n", sb->inode_size);
pr_debug("block_group_nr : %u\n", sb->block_group_nr);
pr_debug("feature_compat : %u\n", sb->feature_compat);
pr_debug("feature_incompat : %u\n", sb->feature_incompat);
pr_debug("feature_ro_compat : %u\n", sb->feature_ro_compat);
pr_debug("uuid : %s\n", uuid_to_string(sb->uuid));
pr_debug("volume_name : %s\n", (char *)sb->volume_name);
pr_debug("last_mounted : %s\n", (char *)sb->last_mounted);
pr_debug("algo_bitmap : %d\n", sb->algo_bitmap);
pr_debug("prealloc_blocks : %d\n", sb->prealloc_blocks);
pr_debug("prealloc_dir_blocks : %d\n", sb->prealloc_dir_blocks);
pr_debug("algo_bitmap : %u\n", sb->algo_bitmap);
pr_debug("prealloc_blocks : %u\n", sb->prealloc_blocks);
pr_debug("prealloc_dir_blocks : %u\n", sb->prealloc_dir_blocks);
pr_debug("journal_uuid : %s\n", uuid_to_string(sb->journal_uuid));
pr_debug("journal_inum : %d\n", sb->journal_inum);
pr_debug("jounral_dev : %d\n", sb->jounral_dev);
pr_debug("last_orphan : %d\n", sb->last_orphan);
pr_debug("journal_inum : %u\n", sb->journal_inum);
pr_debug("jounral_dev : %u\n", sb->jounral_dev);
pr_debug("last_orphan : %u\n", sb->last_orphan);
pr_debug("hash_seed : %u %u %u %u\n", sb->hash_seed[0], sb->hash_seed[1], sb->hash_seed[2], sb->hash_seed[3]);
pr_debug("def_hash_version : %d\n", sb->def_hash_version);
pr_debug("default_mount_options : %d\n", sb->default_mount_options);
pr_debug("first_meta_bg : %d\n", sb->first_meta_block_group_id);
pr_debug("def_hash_version : %u\n", sb->def_hash_version);
pr_debug("default_mount_options : %u\n", sb->default_mount_options);
pr_debug("first_meta_bg : %u\n", sb->first_meta_block_group_id);
}
/// @brief Dumps on debugging output the group descriptor.
/// @param gd the object to dump.
static void ext2_dump_group_descriptor(ext2_group_descriptor_t *gd)
{
pr_debug("block_bitmap : %d\n", gd->block_bitmap);
pr_debug("inode_bitmap : %d\n", gd->inode_bitmap);
pr_debug("inode_table : %d\n", gd->inode_table);
pr_debug("free_blocks_count : %d\n", gd->free_blocks_count);
pr_debug("free_inodes_count : %d\n", gd->free_inodes_count);
pr_debug("used_dirs_count : %d\n", gd->used_dirs_count);
pr_debug("block_bitmap : %u\n", gd->block_bitmap);
pr_debug("inode_bitmap : %u\n", gd->inode_bitmap);
pr_debug("inode_table : %u\n", gd->inode_table);
pr_debug("free_blocks_count : %u\n", gd->free_blocks_count);
pr_debug("free_inodes_count : %u\n", gd->free_inodes_count);
pr_debug("used_dirs_count : %u\n", gd->used_dirs_count);
}
/// @brief Dumps on debugging output the inode.
@@ -601,6 +623,14 @@ static void ext2_dump_inode(ext2_inode_t *inode)
inode->generation, inode->file_acl, inode->dir_acl);
}
/// @brief Dumps on debugging output the dirent.
/// @param dirent the object to dump.
static void ext2_dump_dirent(ext2_dirent_t *dirent)
{
pr_debug(" Inode : %6u Rec. Len. : %4u Name Len. : %4u Type: %s\n", dirent->inode, dirent->rec_len, dirent->name_len, ext2_file_type_to_string(dirent->file_type));
pr_debug(" Name : %s\n", dirent->name);
}
/// @brief Dumps on debugging output the BGDT.
/// @param fs the filesystem of which we print the BGDT.
static void ext2_dump_bgdt(ext2_filesystem_t *fs)
@@ -612,21 +642,21 @@ static void ext2_dump_bgdt(ext2_filesystem_t *fs)
for (uint32_t i = 0; i < fs->block_groups_count; ++i) {
// Get the pointer to the current group descriptor.
ext2_group_descriptor_t *gd = &(fs->block_groups[i]);
pr_debug("Block Group Descriptor [%d] @ %d:\n", i, fs->bgdt_start_block + i * fs->superblock.blocks_per_group);
pr_debug(" block_bitmap : %d\n", gd->block_bitmap);
pr_debug(" inode_bitmap : %d\n", gd->inode_bitmap);
pr_debug(" inode_table : %d\n", gd->inode_table);
pr_debug(" Used Dirs : %d\n", gd->used_dirs_count);
pr_debug(" Free Blocks : %4d of %d\n", gd->free_blocks_count, fs->superblock.blocks_per_group);
pr_debug(" Free Inodes : %4d of %d\n", gd->free_inodes_count, fs->superblock.inodes_per_group);
pr_debug("Block Group Descriptor [%u] @ %u:\n", i, fs->bgdt_start_block + i * fs->superblock.blocks_per_group);
pr_debug(" block_bitmap : %u\n", gd->block_bitmap);
pr_debug(" inode_bitmap : %u\n", gd->inode_bitmap);
pr_debug(" inode_table : %u\n", gd->inode_table);
pr_debug(" Used Dirs : %u\n", gd->used_dirs_count);
pr_debug(" Free Blocks : %4u of %u\n", gd->free_blocks_count, fs->superblock.blocks_per_group);
pr_debug(" Free Inodes : %4u of %u\n", gd->free_inodes_count, fs->superblock.inodes_per_group);
// Dump the block bitmap.
ext2_read_block(fs, gd->block_bitmap, cache);
pr_debug(" Block Bitmap at %d\n", gd->block_bitmap);
pr_debug(" Block Bitmap at %u\n", gd->block_bitmap);
for (uint32_t j = 0; j < fs->block_size; ++j) {
if ((j % 8) == 0)
pr_debug(" Block index: %4d, Bitmap: %s\n", j / 8, dec_to_binary(cache[j / 8], 8));
pr_debug(" Block index: %4u, Bitmap: %s\n", j / 8, dec_to_binary(cache[j / 8], 8));
if (!ext2_check_bitmap_bit(cache, j)) {
pr_debug(" First free block in group is in block %d, the linear index is %d\n", j / 8, j);
pr_debug(" First free block in group is in block %u, the linear index is %u\n", j / 8, j);
break;
}
}
@@ -943,7 +973,7 @@ static int ext2_read_inode(ext2_filesystem_t *fs, ext2_inode_t *inode, uint32_t
// Read the block containing the inode table.
ext2_read_block(fs, fs->block_groups[group_index].inode_table + block, cache);
// Save the inode content.
memcpy(inode, (ext2_inode_t *)((uintptr_t)cache + (offset * fs->superblock.inode_size)), fs->superblock.inode_size);
memcpy(inode, (ext2_inode_t *)((uintptr_t)cache + (offset * fs->superblock.inode_size)), sizeof(ext2_inode_t));
// Free the cache.
kmem_cache_free(cache);
return 0;
@@ -979,7 +1009,7 @@ static int ext2_write_inode(ext2_filesystem_t *fs, ext2_inode_t *inode, uint32_t
// Read the block containing the inode table.
ext2_read_block(fs, fs->block_groups[group_index].inode_table + block, cache);
// Write the inode.
memcpy((ext2_inode_t *)((uintptr_t)cache + (offset * fs->superblock.inode_size)), inode, fs->superblock.inode_size);
memcpy((ext2_inode_t *)((uintptr_t)cache + (offset * fs->superblock.inode_size)), inode, sizeof(ext2_inode_t));
// Write back the block.
ext2_write_block(fs, fs->block_groups[group_index].inode_table + block, cache);
// Free the cache.