#include "ext4_blockdev.h"
#include "ext4_fs.h"
#include "ext4_super.h"
+#include "ext4_inode.h"
+#include "ext4_crc32c.h"
#include "ext4_hash.h"
#include <string.h>
* @param root_info Pointer to root info structure of index
* @return Hash algorithm version
*/
-static inline uint8_t ext4_dir_dx_root_info_get_hash_version(
- struct ext4_directory_dx_root_info *root_info)
+static inline uint8_t
+ext4_dir_dx_rinfo_get_hash_version(struct ext4_dir_idx_rinfo *ri)
{
- return root_info->hash_version;
+ return ri->hash_version;
}
/**@brief Set hash version, that will be used in directory index.
* @param root_info Pointer to root info structure of index
* @param v Hash algorithm version
*/
-static inline void ext4_dir_dx_root_info_set_hash_version(
- struct ext4_directory_dx_root_info *root_info, uint8_t v)
+static inline void
+ext4_dir_dx_rinfo_set_hash_version(struct ext4_dir_idx_rinfo *ri, uint8_t v)
{
- root_info->hash_version = v;
+ ri->hash_version = v;
}
/**@brief Get length of root_info structure in bytes.
* @param root_info Pointer to root info structure of index
* @return Length of the structure
*/
-static inline uint8_t ext4_dir_dx_root_info_get_info_length(
- struct ext4_directory_dx_root_info *root_info)
+static inline uint8_t
+ext4_dir_dx_rinfo_get_info_length(struct ext4_dir_idx_rinfo *ri)
{
- return root_info->info_length;
+ return ri->info_length;
}
/**@brief Set length of root_info structure in bytes.
* @param root_info Pointer to root info structure of index
* @param info_length Length of the structure
*/
-static inline void ext4_dir_dx_root_info_set_info_length(
- struct ext4_directory_dx_root_info *root_info, uint8_t len)
+static inline void
+ext4_dir_dx_root_info_set_info_length(struct ext4_dir_idx_rinfo *ri,
+ uint8_t len)
{
- root_info->info_length = len;
+ ri->info_length = len;
}
/**@brief Get number of indirect levels of HTree.
* @param root_info Pointer to root info structure of index
* @return Height of HTree (actually only 0 or 1)
*/
-static inline uint8_t ext4_dir_dx_root_info_get_indirect_levels(
- struct ext4_directory_dx_root_info *root_info)
+static inline uint8_t
+ext4_dir_dx_rinfo_get_indirect_levels(struct ext4_dir_idx_rinfo *ri)
{
- return root_info->indirect_levels;
+ return ri->indirect_levels;
}
/**@brief Set number of indirect levels of HTree.
* @param root_info Pointer to root info structure of index
* @param lvl Height of HTree (actually only 0 or 1)
*/
-static inline void ext4_dir_dx_root_info_set_indirect_levels(
- struct ext4_directory_dx_root_info *root_info, uint8_t lvl)
+static inline void
+ext4_dir_dx_rinfo_set_indirect_levels(struct ext4_dir_idx_rinfo *ri, uint8_t l)
{
- root_info->indirect_levels = lvl;
+ ri->indirect_levels = l;
}
/**@brief Get maximum number of index node entries.
* @return Maximum of entries in node
*/
static inline uint16_t
-ext4_dir_dx_countlimit_get_limit(struct ext4_directory_dx_countlimit *climit)
+ext4_dir_dx_climit_get_limit(struct ext4_dir_idx_climit *climit)
{
return to_le16(climit->limit);
}
* @param limit Maximum of entries in node
*/
static inline void
-ext4_dir_dx_countlimit_set_limit(struct ext4_directory_dx_countlimit *climit,
- uint16_t limit)
+ext4_dir_dx_climit_set_limit(struct ext4_dir_idx_climit *climit, uint16_t limit)
{
climit->limit = to_le16(limit);
}
* @return Number of entries in node
*/
static inline uint16_t
-ext4_dir_dx_countlimit_get_count(struct ext4_directory_dx_countlimit *climit)
+ext4_dir_dx_climit_get_count(struct ext4_dir_idx_climit *climit)
{
return to_le16(climit->count);
}
* @param count Number of entries in node
*/
static inline void
-ext4_dir_dx_countlimit_set_count(struct ext4_directory_dx_countlimit *climit,
- uint16_t count)
+ext4_dir_dx_climit_set_count(struct ext4_dir_idx_climit *climit, uint16_t count)
{
climit->count = to_le16(count);
}
* @return Hash value
*/
static inline uint32_t
-ext4_dir_dx_entry_get_hash(struct ext4_directory_dx_entry *entry)
+ext4_dir_dx_entry_get_hash(struct ext4_dir_idx_entry *entry)
{
return to_le32(entry->hash);
}
* @param hash Hash value
*/
static inline void
-ext4_dir_dx_entry_set_hash(struct ext4_directory_dx_entry *entry, uint32_t hash)
+ext4_dir_dx_entry_set_hash(struct ext4_dir_idx_entry *entry, uint32_t hash)
{
entry->hash = to_le32(hash);
}
* @return Block address of child node
*/
static inline uint32_t
-ext4_dir_dx_entry_get_block(struct ext4_directory_dx_entry *entry)
+ext4_dir_dx_entry_get_block(struct ext4_dir_idx_entry *entry)
{
return to_le32(entry->block);
}
* @param block Block address of child node
*/
static inline void
-ext4_dir_dx_entry_set_block(struct ext4_directory_dx_entry *entry,
- uint32_t block)
+ext4_dir_dx_entry_set_block(struct ext4_dir_idx_entry *entry, uint32_t block)
{
entry->block = to_le32(block);
}
&hinfo->hash, &hinfo->minor_hash);
}
+#if CONFIG_META_CSUM_ENABLE
+static uint32_t ext4_dir_dx_checksum(struct ext4_inode_ref *inode_ref, void *de,
+ int count_offset, int count,
+ struct ext4_dir_idx_tail *t)
+{
+ uint32_t orig_cum, csum = 0;
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
+ int sz;
+
+ /* Compute the checksum only if the filesystem supports it */
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
+ uint32_t ino_index = to_le32(inode_ref->index);
+ uint32_t ino_gen;
+ ino_gen = to_le32(ext4_inode_get_generation(inode_ref->inode));
+
+ sz = count_offset + (count * sizeof(struct ext4_dir_idx_tail));
+ orig_cum = t->checksum;
+ t->checksum = 0;
+ /* First calculate crc32 checksum against fs uuid */
+ csum = ext4_crc32c(EXT4_CRC32_INIT, sb->uuid, sizeof(sb->uuid));
+ /* Then calculate crc32 checksum against inode number
+ * and inode generation */
+ csum = ext4_crc32c(csum, &ino_index, sizeof(ino_index));
+ csum = ext4_crc32c(csum, &ino_gen, sizeof(ino_gen));
+ /* After that calculate crc32 checksum against all the dx_entry */
+ csum = ext4_crc32c(csum, de, sz);
+ /* Finally calculate crc32 checksum for dx_tail */
+ csum = ext4_crc32c(csum, t, sizeof(struct ext4_dir_idx_tail));
+ t->checksum = orig_cum;
+ }
+ return csum;
+}
+
+static struct ext4_dir_idx_climit *
+ext4_dir_dx_get_climit(struct ext4_inode_ref *inode_ref,
+ struct ext4_dir_en *dirent, int *offset)
+{
+ struct ext4_dir_en *dp;
+ struct ext4_dir_idx_root *root;
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
+ uint32_t block_size = ext4_sb_get_block_size(sb);
+ uint16_t entry_len = ext4_dir_en_get_entry_len(dirent);
+ int count_offset;
+
+
+ if (entry_len == 12) {
+ root = (struct ext4_dir_idx_root *)dirent;
+ dp = (struct ext4_dir_en *)&root->dots[1];
+ if (ext4_dir_en_get_entry_len(dp) != (block_size - 12))
+ return NULL;
+ if (root->info.reserved_zero)
+ return NULL;
+ if (root->info.info_length != sizeof(struct ext4_dir_idx_rinfo))
+ return NULL;
+ count_offset = 32;
+ } else if (entry_len == block_size) {
+ count_offset = 8;
+ } else {
+ return NULL;
+ }
+
+ if (offset)
+ *offset = count_offset;
+ return (struct ext4_dir_idx_climit *)(((char *)dirent) + count_offset);
+}
+
+/*
+ * BIG FAT NOTES:
+ * Currently we do not verify the checksum of HTree node.
+ */
+static bool ext4_dir_dx_csum_verify(struct ext4_inode_ref *inode_ref,
+ struct ext4_dir_en *de)
+{
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
+ uint32_t block_size = ext4_sb_get_block_size(sb);
+ int coff, limit, cnt;
+
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
+ struct ext4_dir_idx_climit *climit;
+ climit = ext4_dir_dx_get_climit(inode_ref, de, &coff);
+ if (!climit) {
+ /* Directory seems corrupted. */
+ return true;
+ }
+ struct ext4_dir_idx_tail *t;
+ limit = ext4_dir_dx_climit_get_limit(climit);
+ cnt = ext4_dir_dx_climit_get_count(climit);
+ if (coff + (limit * sizeof(struct ext4_dir_idx_entry)) >
+ (block_size - sizeof(struct ext4_dir_idx_tail))) {
+ /* There is no space to hold the checksum */
+ return true;
+ }
+ t = (void *)(((struct ext4_dir_idx_entry *)climit) + limit);
+
+ uint32_t c;
+ c = to_le32(ext4_dir_dx_checksum(inode_ref, de, coff, cnt, t));
+ if (t->checksum != c)
+ return false;
+ }
+ return true;
+}
+
+
+static void ext4_dir_set_dx_csum(struct ext4_inode_ref *inode_ref,
+ struct ext4_dir_en *dirent)
+{
+ int coff, limit, count;
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
+ uint32_t block_size = ext4_sb_get_block_size(sb);
+
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
+ struct ext4_dir_idx_climit *climit;
+ climit = ext4_dir_dx_get_climit(inode_ref, dirent, &coff);
+ if (!climit) {
+ /* Directory seems corrupted. */
+ return;
+ }
+ struct ext4_dir_idx_tail *t;
+ limit = ext4_dir_dx_climit_get_limit(climit);
+ count = ext4_dir_dx_climit_get_count(climit);
+ if (coff + (limit * sizeof(struct ext4_dir_idx_entry)) >
+ (block_size - sizeof(struct ext4_dir_idx_tail))) {
+ /* There is no space to hold the checksum */
+ return;
+ }
+
+ t = (void *)(((struct ext4_dir_idx_entry *)climit) + limit);
+ t->checksum = to_le32(ext4_dir_dx_checksum(inode_ref, dirent,
+ coff, count, t));
+ }
+}
+#else
+#define ext4_dir_dx_csum_verify(...) true
+#define ext4_dir_set_dx_csum(...)
+#endif
+
/****************************************************************************/
-int ext4_dir_dx_init(struct ext4_inode_ref *dir)
+int ext4_dir_dx_init(struct ext4_inode_ref *dir, struct ext4_inode_ref *parent)
{
/* Load block 0, where will be index root located */
- uint32_t fblock;
- int rc = ext4_fs_get_inode_data_block_index(dir, 0, &fblock);
+ ext4_fsblk_t fblock;
+ uint32_t iblock;
+ struct ext4_sblock *sb = &dir->fs->sb;
+ uint32_t block_size = ext4_sb_get_block_size(&dir->fs->sb);
+
+ int rc = ext4_fs_append_inode_dblk(dir, &fblock, &iblock);
if (rc != EOK)
return rc;
struct ext4_block block;
- rc = ext4_block_get(dir->fs->bdev, &block, fblock);
+ rc = ext4_block_get_noread(dir->fs->bdev, &block, fblock);
if (rc != EOK)
return rc;
/* Initialize pointers to data structures */
- struct ext4_directory_dx_root *root = (void *)block.data;
- struct ext4_directory_dx_root_info *info = &(root->info);
+ struct ext4_dir_idx_root *root = (void *)block.data;
+ struct ext4_dir_idx_rinfo *info = &(root->info);
+
+ memset(root, 0, sizeof(struct ext4_dir_idx_root));
+ struct ext4_dir_en *de;
+
+ /* Initialize dot entries */
+ de = (struct ext4_dir_en *)root->dots;
+ ext4_dir_write_entry(sb, de, 12, dir, ".", strlen("."));
+
+ de = (struct ext4_dir_en *)(root->dots + 1);
+ uint16_t elen = block_size - 12;
+ ext4_dir_write_entry(sb, de, elen, parent, "..", strlen(".."));
/* Initialize root info structure */
uint8_t hash_version = ext4_get8(&dir->fs->sb, default_hash_version);
- ext4_dir_dx_root_info_set_hash_version(info, hash_version);
- ext4_dir_dx_root_info_set_indirect_levels(info, 0);
+ ext4_dir_dx_rinfo_set_hash_version(info, hash_version);
+ ext4_dir_dx_rinfo_set_indirect_levels(info, 0);
ext4_dir_dx_root_info_set_info_length(info, 8);
/* Set limit and current number of entries */
- struct ext4_directory_dx_countlimit *countlimit =
- (struct ext4_directory_dx_countlimit *)&root->entries;
+ struct ext4_dir_idx_climit *climit;
+ climit = (struct ext4_dir_idx_climit *)&root->en;
- ext4_dir_dx_countlimit_set_count(countlimit, 1);
+ ext4_dir_dx_climit_set_count(climit, 1);
- uint32_t block_size = ext4_sb_get_block_size(&dir->fs->sb);
- uint32_t entry_space = block_size -
- 2 * sizeof(struct ext4_directory_dx_dot_entry) -
- sizeof(struct ext4_directory_dx_root_info);
- uint16_t root_limit =
- entry_space / sizeof(struct ext4_directory_dx_entry);
- ext4_dir_dx_countlimit_set_limit(countlimit, root_limit);
+ uint32_t entry_space;
+ entry_space = block_size - 2 * sizeof(struct ext4_dir_idx_dot_en) -
+ sizeof(struct ext4_dir_idx_rinfo);
+
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM))
+ entry_space -= sizeof(struct ext4_dir_idx_tail);
+
+ uint16_t root_limit = entry_space / sizeof(struct ext4_dir_idx_entry);
+ ext4_dir_dx_climit_set_limit(climit, root_limit);
/* Append new block, where will be new entries inserted in the future */
- uint32_t iblock;
- rc = ext4_fs_append_inode_block(dir, &fblock, &iblock);
+ rc = ext4_fs_append_inode_dblk(dir, &fblock, &iblock);
if (rc != EOK) {
ext4_block_set(dir->fs->bdev, &block);
return rc;
}
struct ext4_block new_block;
-
- rc = ext4_block_get(dir->fs->bdev, &new_block, fblock);
+ rc = ext4_block_get_noread(dir->fs->bdev, &new_block, fblock);
if (rc != EOK) {
ext4_block_set(dir->fs->bdev, &block);
return rc;
}
/* Fill the whole block with empty entry */
- struct ext4_directory_entry_ll *block_entry = (void *)new_block.data;
+ struct ext4_dir_en *be = (void *)new_block.data;
+
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
+ uint16_t len = block_size - sizeof(struct ext4_dir_entry_tail);
+ ext4_dir_en_set_entry_len(be, len);
+ ext4_dir_en_set_name_len(sb, be, 0);
+ ext4_dir_en_set_inode_type(sb, be, EXT4_DE_UNKNOWN);
+ ext4_dir_init_entry_tail(EXT4_DIRENT_TAIL(be, block_size));
+ ext4_dir_set_csum(dir, be);
+ } else {
+ ext4_dir_en_set_entry_len(be, block_size);
+ }
- ext4_dir_entry_ll_set_entry_length(block_entry, block_size);
- ext4_dir_entry_ll_set_inode(block_entry, 0);
+ ext4_dir_en_set_inode(be, 0);
- new_block.dirty = true;
+ ext4_bcache_set_dirty(new_block.buf);
rc = ext4_block_set(dir->fs->bdev, &new_block);
if (rc != EOK) {
ext4_block_set(dir->fs->bdev, &block);
}
/* Connect new block to the only entry in index */
- struct ext4_directory_dx_entry *entry = root->entries;
+ struct ext4_dir_idx_entry *entry = root->en;
ext4_dir_dx_entry_set_block(entry, iblock);
- block.dirty = true;
+ ext4_dir_set_dx_csum(dir, (struct ext4_dir_en *)block.data);
+ ext4_bcache_set_dirty(block.buf);
return ext4_block_set(dir->fs->bdev, &block);
}
struct ext4_sblock *sb, size_t name_len,
const char *name)
{
- struct ext4_directory_dx_root *root =
- (struct ext4_directory_dx_root *)root_block->data;
+ struct ext4_dir_idx_root *root;
+ root = (struct ext4_dir_idx_root *)root_block->data;
if ((root->info.hash_version != EXT2_HTREE_LEGACY) &&
(root->info.hash_version != EXT2_HTREE_HALF_MD4) &&
(root->info.hash_version != EXT2_HTREE_TEA))
/* Check if node limit is correct */
uint32_t block_size = ext4_sb_get_block_size(sb);
uint32_t entry_space = block_size;
- entry_space -= 2 * sizeof(struct ext4_directory_dx_dot_entry);
- entry_space -= sizeof(struct ext4_directory_dx_root_info);
- entry_space = entry_space / sizeof(struct ext4_directory_dx_entry);
-
- uint16_t limit = ext4_dir_dx_countlimit_get_limit(
- (struct ext4_directory_dx_countlimit *)&root->entries);
+ entry_space -= 2 * sizeof(struct ext4_dir_idx_dot_en);
+ entry_space -= sizeof(struct ext4_dir_idx_rinfo);
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM))
+ entry_space -= sizeof(struct ext4_dir_idx_tail);
+ entry_space = entry_space / sizeof(struct ext4_dir_idx_entry);
+
+ struct ext4_dir_idx_climit *climit = (void *)&root->en;
+ uint16_t limit = ext4_dir_dx_climit_get_limit(climit);
if (limit != entry_space)
return EXT4_ERR_BAD_DX_DIR;
/* Check hash version and modify if necessary */
- hinfo->hash_version =
- ext4_dir_dx_root_info_get_hash_version(&root->info);
+ hinfo->hash_version = ext4_dir_dx_rinfo_get_hash_version(&root->info);
if ((hinfo->hash_version <= EXT2_HTREE_TEA) &&
(ext4_sb_check_flag(sb, EXT4_SUPERBLOCK_FLAGS_UNSIGNED_HASH))) {
/* Use unsigned hash */
}
/* Load hash seed from superblock */
-
hinfo->seed = ext4_get8(sb, hash_seed);
/* Compute hash value of name */
static int ext4_dir_dx_get_leaf(struct ext4_hash_info *hinfo,
struct ext4_inode_ref *inode_ref,
struct ext4_block *root_block,
- struct ext4_directory_dx_block **dx_block,
- struct ext4_directory_dx_block *dx_blocks)
+ struct ext4_dir_idx_block **dx_block,
+ struct ext4_dir_idx_block *dx_blocks)
{
- struct ext4_directory_dx_block *tmp_dx_block = dx_blocks;
- struct ext4_directory_dx_root *root =
- (struct ext4_directory_dx_root *)root_block->data;
- struct ext4_directory_dx_entry *entries =
- (struct ext4_directory_dx_entry *)&root->entries;
-
- uint16_t limit = ext4_dir_dx_countlimit_get_limit(
- (struct ext4_directory_dx_countlimit *)entries);
- uint8_t indirect_level =
- ext4_dir_dx_root_info_get_indirect_levels(&root->info);
-
- struct ext4_block *tmp_block = root_block;
- struct ext4_directory_dx_entry *p;
- struct ext4_directory_dx_entry *q;
- struct ext4_directory_dx_entry *m;
- struct ext4_directory_dx_entry *at;
+ struct ext4_dir_idx_root *root;
+ struct ext4_dir_idx_entry *entries;
+ struct ext4_dir_idx_entry *p;
+ struct ext4_dir_idx_entry *q;
+ struct ext4_dir_idx_entry *m;
+ struct ext4_dir_idx_entry *at;
+ ext4_fsblk_t fblk;
+ uint32_t block_size;
+ uint16_t limit;
+ uint16_t entry_space;
+ uint8_t ind_level;
+ int r;
+
+ struct ext4_dir_idx_block *tmp_dx_blk = dx_blocks;
+ struct ext4_block *tmp_blk = root_block;
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
+
+ block_size = ext4_sb_get_block_size(sb);
+ root = (struct ext4_dir_idx_root *)root_block->data;
+ entries = (struct ext4_dir_idx_entry *)&root->en;
+ limit = ext4_dir_dx_climit_get_limit((void *)entries);
+ ind_level = ext4_dir_dx_rinfo_get_indirect_levels(&root->info);
/* Walk through the index tree */
while (true) {
- uint16_t count = ext4_dir_dx_countlimit_get_count(
- (struct ext4_directory_dx_countlimit *)entries);
- if ((count == 0) || (count > limit))
+ uint16_t cnt = ext4_dir_dx_climit_get_count((void *)entries);
+ if ((cnt == 0) || (cnt > limit))
return EXT4_ERR_BAD_DX_DIR;
/* Do binary search in every node */
p = entries + 1;
- q = entries + count - 1;
+ q = entries + cnt - 1;
while (p <= q) {
m = p + (q - p) / 2;
at = p - 1;
/* Write results */
-
- memcpy(&tmp_dx_block->block, tmp_block,
- sizeof(struct ext4_block));
- tmp_dx_block->entries = entries;
- tmp_dx_block->position = at;
+ memcpy(&tmp_dx_blk->b, tmp_blk, sizeof(struct ext4_block));
+ tmp_dx_blk->entries = entries;
+ tmp_dx_blk->position = at;
/* Is algorithm in the leaf? */
- if (indirect_level == 0) {
- *dx_block = tmp_dx_block;
+ if (ind_level == 0) {
+ *dx_block = tmp_dx_blk;
return EOK;
}
/* Goto child node */
- uint32_t next_block = ext4_dir_dx_entry_get_block(at);
+ uint32_t n_blk = ext4_dir_dx_entry_get_block(at);
- indirect_level--;
+ ind_level--;
- uint32_t fblock;
- int rc = ext4_fs_get_inode_data_block_index(
- inode_ref, next_block, &fblock);
- if (rc != EOK)
- return rc;
+ r = ext4_fs_get_inode_dblk_idx(inode_ref, n_blk, &fblk, false);
+ if (r != EOK)
+ return r;
- rc = ext4_block_get(inode_ref->fs->bdev, tmp_block, fblock);
- if (rc != EOK)
- return rc;
+ r = ext4_block_get(inode_ref->fs->bdev, tmp_blk, fblk);
+ if (r != EOK)
+ return r;
- entries =
- ((struct ext4_directory_dx_node *)tmp_block->data)->entries;
- limit = ext4_dir_dx_countlimit_get_limit(
- (struct ext4_directory_dx_countlimit *)entries);
+ entries = ((struct ext4_dir_idx_node *)tmp_blk->data)->entries;
+ limit = ext4_dir_dx_climit_get_limit((void *)entries);
- uint16_t entry_space =
- ext4_sb_get_block_size(&inode_ref->fs->sb) -
- sizeof(struct ext4_fake_directory_entry);
+ entry_space = block_size - sizeof(struct ext4_fake_dir_entry);
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM))
+ entry_space -= sizeof(struct ext4_dir_idx_tail);
- entry_space =
- entry_space / sizeof(struct ext4_directory_dx_entry);
+ entry_space = entry_space / sizeof(struct ext4_dir_idx_entry);
if (limit != entry_space) {
- ext4_block_set(inode_ref->fs->bdev, tmp_block);
+ ext4_block_set(inode_ref->fs->bdev, tmp_blk);
return EXT4_ERR_BAD_DX_DIR;
}
- ++tmp_dx_block;
+ if (!ext4_dir_dx_csum_verify(inode_ref, (void *)tmp_blk->data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ inode_ref->index,
+ n_blk);
+ }
+
+ ++tmp_dx_blk;
}
/* Unreachable */
*/
static int ext4_dir_dx_next_block(struct ext4_inode_ref *inode_ref,
uint32_t hash,
- struct ext4_directory_dx_block *dx_block,
- struct ext4_directory_dx_block *dx_blocks)
+ struct ext4_dir_idx_block *dx_block,
+ struct ext4_dir_idx_block *dx_blocks)
{
+ int r;
uint32_t num_handles = 0;
- struct ext4_directory_dx_block *p = dx_block;
+ ext4_fsblk_t blk_adr;
+ struct ext4_dir_idx_block *p = dx_block;
/* Try to find data block with next bunch of entries */
while (true) {
- p->position++;
- uint16_t count = ext4_dir_dx_countlimit_get_count(
- (struct ext4_directory_dx_countlimit *)p->entries);
+ uint16_t cnt = ext4_dir_dx_climit_get_count((void *)p->entries);
- if (p->position < p->entries + count)
+ p->position++;
+ if (p->position < p->entries + cnt)
break;
if (p == dx_blocks)
/* Fill new path */
while (num_handles--) {
- uint32_t block_idx = ext4_dir_dx_entry_get_block(p->position);
- uint32_t block_addr;
-
- int rc = ext4_fs_get_inode_data_block_index(
- inode_ref, block_idx, &block_addr);
- if (rc != EOK)
- return rc;
-
- struct ext4_block block;
- rc = ext4_block_get(inode_ref->fs->bdev, &block, block_addr);
- if (rc != EOK)
- return rc;
+ uint32_t blk = ext4_dir_dx_entry_get_block(p->position);
+ r = ext4_fs_get_inode_dblk_idx(inode_ref, blk, &blk_adr, false);
+ if (r != EOK)
+ return r;
+
+ struct ext4_block b;
+ r = ext4_block_get(inode_ref->fs->bdev, &b, blk_adr);
+ if (r != EOK)
+ return r;
+
+ if (!ext4_dir_dx_csum_verify(inode_ref, (void *)b.data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ inode_ref->index,
+ blk);
+ }
p++;
/* Don't forget to put old block (prevent memory leak) */
- rc = ext4_block_set(inode_ref->fs->bdev, &p->block);
- if (rc != EOK)
- return rc;
+ r = ext4_block_set(inode_ref->fs->bdev, &p->b);
+ if (r != EOK)
+ return r;
- memcpy(&p->block, &p->block, sizeof(block));
- p->entries =
- ((struct ext4_directory_dx_node *)block.data)->entries;
+ memcpy(&p->b, &b, sizeof(b));
+ p->entries = ((struct ext4_dir_idx_node *)b.data)->entries;
p->position = p->entries;
}
return ENOENT;
}
-int ext4_dir_dx_find_entry(struct ext4_directory_search_result *result,
+int ext4_dir_dx_find_entry(struct ext4_dir_search_result *result,
struct ext4_inode_ref *inode_ref, size_t name_len,
const char *name)
{
/* Load direct block 0 (index root) */
- uint32_t root_block_addr;
+ ext4_fsblk_t root_block_addr;
int rc2;
- int rc =
- ext4_fs_get_inode_data_block_index(inode_ref, 0, &root_block_addr);
+ int rc;
+ rc = ext4_fs_get_inode_dblk_idx(inode_ref, 0, &root_block_addr, false);
if (rc != EOK)
return rc;
if (rc != EOK)
return rc;
+ if (!ext4_dir_dx_csum_verify(inode_ref, (void *)root_block.data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree root checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ inode_ref->index,
+ (uint32_t)0);
+ }
+
/* Initialize hash info (compute hash value) */
struct ext4_hash_info hinfo;
rc = ext4_dir_hinfo_init(&hinfo, &root_block, &fs->sb, name_len, name);
* Hardcoded number 2 means maximum height of index tree,
* specified in the Linux driver.
*/
- struct ext4_directory_dx_block dx_blocks[2];
- struct ext4_directory_dx_block *dx_block;
- struct ext4_directory_dx_block *tmp;
+ struct ext4_dir_idx_block dx_blocks[2];
+ struct ext4_dir_idx_block *dx_block;
+ struct ext4_dir_idx_block *tmp;
rc = ext4_dir_dx_get_leaf(&hinfo, inode_ref, &root_block, &dx_block,
dx_blocks);
do {
/* Load leaf block */
- uint32_t leaf_block_idx =
- ext4_dir_dx_entry_get_block(dx_block->position);
- uint32_t leaf_block_addr;
+ uint32_t leaf_blk_idx;
+ ext4_fsblk_t leaf_block_addr;
+ struct ext4_block b;
- rc = ext4_fs_get_inode_data_block_index(
- inode_ref, leaf_block_idx, &leaf_block_addr);
+ leaf_blk_idx = ext4_dir_dx_entry_get_block(dx_block->position);
+ rc = ext4_fs_get_inode_dblk_idx(inode_ref, leaf_blk_idx,
+ &leaf_block_addr, false);
if (rc != EOK)
goto cleanup;
- struct ext4_block leaf_block;
- rc = ext4_block_get(fs->bdev, &leaf_block, leaf_block_addr);
+ rc = ext4_block_get(fs->bdev, &b, leaf_block_addr);
if (rc != EOK)
goto cleanup;
+ if (!ext4_dir_csum_verify(inode_ref, (void *)b.data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree leaf block checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ inode_ref->index,
+ leaf_blk_idx);
+ }
+
/* Linear search inside block */
- struct ext4_directory_entry_ll *res_dentry;
- rc = ext4_dir_find_in_block(&leaf_block, &fs->sb, name_len,
- name, &res_dentry);
+ struct ext4_dir_en *de;
+ rc = ext4_dir_find_in_block(&b, &fs->sb, name_len, name, &de);
/* Found => return it */
if (rc == EOK) {
- result->block = leaf_block;
- result->dentry = res_dentry;
+ result->block = b;
+ result->dentry = de;
goto cleanup;
}
/* Not found, leave untouched */
- rc2 = ext4_block_set(fs->bdev, &leaf_block);
+ rc2 = ext4_block_set(fs->bdev, &b);
if (rc2 != EOK)
goto cleanup;
tmp = dx_blocks;
while (tmp <= dx_block) {
- rc2 = ext4_block_set(fs->bdev, &tmp->block);
+ rc2 = ext4_block_set(fs->bdev, &tmp->b);
if (rc == EOK && rc2 != EOK)
rc = rc2;
++tmp;
/**@brief Insert new index entry to block.
* Note that space for new entry must be checked by caller.
+ * @param inode_ref Directory i-node
* @param index_block Block where to insert new entry
* @param hash Hash value covered by child node
* @param iblock Logical number of child block
*
*/
static void
-ext4_dir_dx_insert_entry(struct ext4_directory_dx_block *index_block,
+ext4_dir_dx_insert_entry(struct ext4_inode_ref *inode_ref __unused,
+ struct ext4_dir_idx_block *index_block,
uint32_t hash, uint32_t iblock)
{
- struct ext4_directory_dx_entry *old_index_entry = index_block->position;
- struct ext4_directory_dx_entry *new_index_entry = old_index_entry + 1;
+ struct ext4_dir_idx_entry *old_index_entry = index_block->position;
+ struct ext4_dir_idx_entry *new_index_entry = old_index_entry + 1;
+ struct ext4_dir_idx_climit *climit = (void *)index_block->entries;
+ struct ext4_dir_idx_entry *start_index = index_block->entries;
+ uint32_t count = ext4_dir_dx_climit_get_count(climit);
- struct ext4_directory_dx_countlimit *countlimit =
- (struct ext4_directory_dx_countlimit *)index_block->entries;
- uint32_t count = ext4_dir_dx_countlimit_get_count(countlimit);
-
- struct ext4_directory_dx_entry *start_index = index_block->entries;
- size_t bytes =
- (uint8_t *)(start_index + count) - (uint8_t *)(new_index_entry);
+ size_t bytes;
+ bytes = (uint8_t *)(start_index + count) - (uint8_t *)(new_index_entry);
memmove(new_index_entry + 1, new_index_entry, bytes);
ext4_dir_dx_entry_set_block(new_index_entry, iblock);
ext4_dir_dx_entry_set_hash(new_index_entry, hash);
-
- ext4_dir_dx_countlimit_set_count(countlimit, count + 1);
-
- index_block->block.dirty = true;
+ ext4_dir_dx_climit_set_count(climit, count + 1);
+ ext4_dir_set_dx_csum(inode_ref, (void *)index_block->b.data);
+ ext4_bcache_set_dirty(index_block->b.buf);
}
/**@brief Split directory entries to two parts preventing node overflow.
static int ext4_dir_dx_split_data(struct ext4_inode_ref *inode_ref,
struct ext4_hash_info *hinfo,
struct ext4_block *old_data_block,
- struct ext4_directory_dx_block *index_block,
+ struct ext4_dir_idx_block *index_block,
struct ext4_block *new_data_block)
{
int rc = EOK;
-
- /* Allocate buffer for directory entries */
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
uint32_t block_size = ext4_sb_get_block_size(&inode_ref->fs->sb);
+ /* Allocate buffer for directory entries */
uint8_t *entry_buffer = malloc(block_size);
if (entry_buffer == NULL)
return ENOMEM;
/* dot entry has the smallest size available */
- uint32_t max_entry_count =
- block_size / sizeof(struct ext4_directory_dx_dot_entry);
+ uint32_t max_ecnt = block_size / sizeof(struct ext4_dir_idx_dot_en);
/* Allocate sort entry */
- struct ext4_dx_sort_entry *sort_array =
- malloc(max_entry_count * sizeof(struct ext4_dx_sort_entry));
+ struct ext4_dx_sort_entry *sort;
- if (sort_array == NULL) {
+ sort = malloc(max_ecnt * sizeof(struct ext4_dx_sort_entry));
+ if (sort == NULL) {
free(entry_buffer);
return ENOMEM;
}
uint32_t real_size = 0;
/* Initialize hinfo */
- struct ext4_hash_info tmp_hinfo;
- memcpy(&tmp_hinfo, hinfo, sizeof(struct ext4_hash_info));
+ struct ext4_hash_info hinfo_tmp;
+ memcpy(&hinfo_tmp, hinfo, sizeof(struct ext4_hash_info));
/* Load all valid entries to the buffer */
- struct ext4_directory_entry_ll *dentry = (void *)old_data_block->data;
+ struct ext4_dir_en *de = (void *)old_data_block->data;
uint8_t *entry_buffer_ptr = entry_buffer;
- while ((void *)dentry < (void *)(old_data_block->data + block_size)) {
+ while ((void *)de < (void *)(old_data_block->data + block_size)) {
/* Read only valid entries */
- if (ext4_dir_entry_ll_get_inode(dentry) &&
- dentry->name_length) {
- uint8_t len = ext4_dir_entry_ll_get_name_length(
- &inode_ref->fs->sb, dentry);
-
- rc = ext4_dir_dx_hash_string(&tmp_hinfo, len,
- (char *)dentry->name);
+ if (ext4_dir_en_get_inode(de) && de->name_len) {
+ uint8_t len = ext4_dir_en_get_name_len(sb, de);
+ rc = ext4_dir_dx_hash_string(&hinfo_tmp, len,
+ (char *)de->name);
if (rc != EOK) {
- free(sort_array);
+ free(sort);
free(entry_buffer);
return rc;
}
uint32_t rec_len = 8 + len;
-
if ((rec_len % 4) != 0)
rec_len += 4 - (rec_len % 4);
- memcpy(entry_buffer_ptr, dentry, rec_len);
+ memcpy(entry_buffer_ptr, de, rec_len);
- sort_array[idx].dentry = entry_buffer_ptr;
- sort_array[idx].rec_len = rec_len;
- sort_array[idx].hash = tmp_hinfo.hash;
+ sort[idx].dentry = entry_buffer_ptr;
+ sort[idx].rec_len = rec_len;
+ sort[idx].hash = hinfo_tmp.hash;
entry_buffer_ptr += rec_len;
real_size += rec_len;
idx++;
}
- dentry = (void *)((uint8_t *)dentry +
- ext4_dir_entry_ll_get_entry_length(dentry));
+ size_t elen = ext4_dir_en_get_entry_len(de);
+ de = (void *)((uint8_t *)de + elen);
}
/* Sort all entries */
#if CONFIG_DIR_INDEX_COMB_SORT
- comb_sort(sort_array, idx);
+ comb_sort(sort, idx);
#else
- qsort(sort_array, idx, sizeof(struct ext4_dx_sort_entry),
+ qsort(sort, idx, sizeof(struct ext4_dx_sort_entry),
ext4_dir_dx_entry_comparator);
#endif
/* Allocate new block for store the second part of entries */
- uint32_t new_fblock;
+ ext4_fsblk_t new_fblock;
uint32_t new_iblock;
- rc = ext4_fs_append_inode_block(inode_ref, &new_fblock, &new_iblock);
+ rc = ext4_fs_append_inode_dblk(inode_ref, &new_fblock, &new_iblock);
if (rc != EOK) {
- free(sort_array);
+ free(sort);
free(entry_buffer);
return rc;
}
/* Load new block */
struct ext4_block new_data_block_tmp;
- rc = ext4_block_get(inode_ref->fs->bdev, &new_data_block_tmp,
- new_fblock);
+ rc = ext4_block_get_noread(inode_ref->fs->bdev, &new_data_block_tmp,
+ new_fblock);
if (rc != EOK) {
- free(sort_array);
+ free(sort);
free(entry_buffer);
return rc;
}
uint32_t mid = 0;
uint32_t i;
for (i = 0; i < idx; ++i) {
- if ((current_size + sort_array[i].rec_len) > (block_size / 2)) {
- new_hash = sort_array[i].hash;
+ if ((current_size + sort[i].rec_len) > (block_size / 2)) {
+ new_hash = sort[i].hash;
mid = i;
break;
}
- current_size += sort_array[i].rec_len;
+ current_size += sort[i].rec_len;
}
/* Check hash collision */
uint32_t continued = 0;
- if (new_hash == sort_array[mid - 1].hash)
+ if (new_hash == sort[mid - 1].hash)
continued = 1;
- uint32_t offset = 0;
+ uint32_t off = 0;
void *ptr;
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM))
+ block_size -= sizeof(struct ext4_dir_entry_tail);
/* First part - to the old block */
for (i = 0; i < mid; ++i) {
- ptr = old_data_block->data + offset;
- memcpy(ptr, sort_array[i].dentry, sort_array[i].rec_len);
+ ptr = old_data_block->data + off;
+ memcpy(ptr, sort[i].dentry, sort[i].rec_len);
- struct ext4_directory_entry_ll *tmp = ptr;
+ struct ext4_dir_en *t = ptr;
if (i < (mid - 1))
- ext4_dir_entry_ll_set_entry_length(
- tmp, sort_array[i].rec_len);
+ ext4_dir_en_set_entry_len(t, sort[i].rec_len);
else
- ext4_dir_entry_ll_set_entry_length(tmp,
- block_size - offset);
+ ext4_dir_en_set_entry_len(t, block_size - off);
- offset += sort_array[i].rec_len;
+ off += sort[i].rec_len;
}
/* Second part - to the new block */
- offset = 0;
+ off = 0;
for (i = mid; i < idx; ++i) {
- ptr = new_data_block_tmp.data + offset;
- memcpy(ptr, sort_array[i].dentry, sort_array[i].rec_len);
+ ptr = new_data_block_tmp.data + off;
+ memcpy(ptr, sort[i].dentry, sort[i].rec_len);
- struct ext4_directory_entry_ll *tmp = ptr;
+ struct ext4_dir_en *t = ptr;
if (i < (idx - 1))
- ext4_dir_entry_ll_set_entry_length(
- tmp, sort_array[i].rec_len);
+ ext4_dir_en_set_entry_len(t, sort[i].rec_len);
else
- ext4_dir_entry_ll_set_entry_length(tmp,
- block_size - offset);
+ ext4_dir_en_set_entry_len(t, block_size - off);
- offset += sort_array[i].rec_len;
+ off += sort[i].rec_len;
}
+ block_size = ext4_sb_get_block_size(&inode_ref->fs->sb);
+
/* Do some steps to finish operation */
- old_data_block->dirty = true;
- new_data_block_tmp.dirty = true;
+ sb = &inode_ref->fs->sb;
+ if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
+ struct ext4_dir_entry_tail *t;
+
+ t = EXT4_DIRENT_TAIL(old_data_block->data, block_size);
+ ext4_dir_init_entry_tail(t);
+ t = EXT4_DIRENT_TAIL(new_data_block_tmp.data, block_size);
+ ext4_dir_init_entry_tail(t);
+ }
+ ext4_dir_set_csum(inode_ref, (void *)old_data_block->data);
+ ext4_dir_set_csum(inode_ref, (void *)new_data_block_tmp.data);
+ ext4_bcache_set_dirty(old_data_block->buf);
+ ext4_bcache_set_dirty(new_data_block_tmp.buf);
- free(sort_array);
+ free(sort);
free(entry_buffer);
- ext4_dir_dx_insert_entry(index_block, new_hash + continued, new_iblock);
+ ext4_dir_dx_insert_entry(inode_ref, index_block, new_hash + continued,
+ new_iblock);
*new_data_block = new_data_block_tmp;
-
return EOK;
}
* @return Error code
*/
static int
-ext4_dir_dx_split_index(struct ext4_inode_ref *inode_ref,
- struct ext4_directory_dx_block *dx_blocks,
- struct ext4_directory_dx_block *dx_block,
- struct ext4_directory_dx_block **new_dx_block)
+ext4_dir_dx_split_index(struct ext4_inode_ref *ino_ref,
+ struct ext4_dir_idx_block *dx_blks,
+ struct ext4_dir_idx_block *dxb,
+ struct ext4_dir_idx_block **new_dx_block)
{
- struct ext4_directory_dx_entry *entries;
+ struct ext4_sblock *sb = &ino_ref->fs->sb;
+ struct ext4_dir_idx_entry *e;
+ int r;
+
+ uint32_t block_size = ext4_sb_get_block_size(&ino_ref->fs->sb);
+ uint32_t entry_space = block_size - sizeof(struct ext4_fake_dir_entry);
+ uint32_t node_limit = entry_space / sizeof(struct ext4_dir_idx_entry);
- if (dx_block == dx_blocks)
- entries =
- ((struct ext4_directory_dx_root *)dx_block->block.data)
- ->entries;
+ bool meta_csum = ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM);
+
+ if (dxb == dx_blks)
+ e = ((struct ext4_dir_idx_root *)dxb->b.data)->en;
else
- entries =
- ((struct ext4_directory_dx_node *)dx_block->block.data)
- ->entries;
+ e = ((struct ext4_dir_idx_node *)dxb->b.data)->entries;
- struct ext4_directory_dx_countlimit *countlimit =
- (struct ext4_directory_dx_countlimit *)entries;
+ struct ext4_dir_idx_climit *climit = (struct ext4_dir_idx_climit *)e;
- uint16_t leaf_limit = ext4_dir_dx_countlimit_get_limit(countlimit);
- uint16_t leaf_count = ext4_dir_dx_countlimit_get_count(countlimit);
+ uint16_t leaf_limit = ext4_dir_dx_climit_get_limit(climit);
+ uint16_t leaf_count = ext4_dir_dx_climit_get_count(climit);
/* Check if is necessary to split index block */
if (leaf_limit == leaf_count) {
- size_t levels = dx_block - dx_blocks;
+ struct ext4_dir_idx_entry *ren;
+ ptrdiff_t levels = dxb - dx_blks;
- struct ext4_directory_dx_entry *root_entries =
- ((struct ext4_directory_dx_root *)dx_blocks[0].block.data)
- ->entries;
+ ren = ((struct ext4_dir_idx_root *)dx_blks[0].b.data)->en;
+ struct ext4_dir_idx_climit *rclimit = (void *)ren;
+ uint16_t root_limit = ext4_dir_dx_climit_get_limit(rclimit);
+ uint16_t root_count = ext4_dir_dx_climit_get_count(rclimit);
- struct ext4_directory_dx_countlimit *root_countlimit =
- (struct ext4_directory_dx_countlimit *)root_entries;
- uint16_t root_limit =
- ext4_dir_dx_countlimit_get_limit(root_countlimit);
- uint16_t root_count =
- ext4_dir_dx_countlimit_get_count(root_countlimit);
/* Linux limitation */
if ((levels > 0) && (root_limit == root_count))
return ENOSPC;
/* Add new block to directory */
- uint32_t new_fblock;
- uint32_t new_iblock;
- int rc = ext4_fs_append_inode_block(inode_ref, &new_fblock,
- &new_iblock);
- if (rc != EOK)
- return rc;
+ ext4_fsblk_t new_fblk;
+ uint32_t new_iblk;
+ r = ext4_fs_append_inode_dblk(ino_ref, &new_fblk, &new_iblk);
+ if (r != EOK)
+ return r;
/* load new block */
- struct ext4_block new_block;
- rc =
- ext4_block_get(inode_ref->fs->bdev, &new_block, new_fblock);
- if (rc != EOK)
- return rc;
-
- struct ext4_directory_dx_node *new_node =
- (void *)new_block.data;
- struct ext4_directory_dx_entry *new_entries = new_node->entries;
+ struct ext4_block b;
+ r = ext4_block_get_noread(ino_ref->fs->bdev, &b, new_fblk);
+ if (r != EOK)
+ return r;
- memset(&new_node->fake, 0,
- sizeof(struct ext4_fake_directory_entry));
-
- uint32_t block_size =
- ext4_sb_get_block_size(&inode_ref->fs->sb);
+ struct ext4_dir_idx_node *new_node = (void *)b.data;
+ struct ext4_dir_idx_entry *new_en = new_node->entries;
+ memset(&new_node->fake, 0, sizeof(struct ext4_fake_dir_entry));
new_node->fake.entry_length = block_size;
/* Split leaf node */
if (levels > 0) {
uint32_t count_left = leaf_count / 2;
uint32_t count_right = leaf_count - count_left;
- uint32_t hash_right =
- ext4_dir_dx_entry_get_hash(entries + count_left);
+ uint32_t hash_right;
+ size_t sz;
+
+ struct ext4_dir_idx_climit *left_climit;
+ struct ext4_dir_idx_climit *right_climit;
+ hash_right = ext4_dir_dx_entry_get_hash(e + count_left);
/* Copy data to new node */
- memcpy((void *)new_entries,
- (void *)(entries + count_left),
- count_right *
- sizeof(struct ext4_directory_dx_entry));
+ sz = count_right * sizeof(struct ext4_dir_idx_entry);
+ memcpy(new_en, e + count_left, sz);
/* Initialize new node */
- struct ext4_directory_dx_countlimit *left_countlimit =
- (struct ext4_directory_dx_countlimit *)entries;
- struct ext4_directory_dx_countlimit *right_countlimit =
- (struct ext4_directory_dx_countlimit *)new_entries;
-
- ext4_dir_dx_countlimit_set_count(left_countlimit,
- count_left);
- ext4_dir_dx_countlimit_set_count(right_countlimit,
- count_right);
-
- uint32_t entry_space =
- block_size -
- sizeof(struct ext4_fake_directory_entry);
- uint32_t node_limit =
- entry_space /
- sizeof(struct ext4_directory_dx_entry);
- ext4_dir_dx_countlimit_set_limit(right_countlimit,
- node_limit);
+ left_climit = (struct ext4_dir_idx_climit *)e;
+ right_climit = (struct ext4_dir_idx_climit *)new_en;
+
+ ext4_dir_dx_climit_set_count(left_climit, count_left);
+ ext4_dir_dx_climit_set_count(right_climit, count_right);
+
+ if (meta_csum)
+ entry_space -= sizeof(struct ext4_dir_idx_tail);
+
+ ext4_dir_dx_climit_set_limit(right_climit, node_limit);
/* Which index block is target for new entry */
uint32_t position_index =
- (dx_block->position - dx_block->entries);
+ (dxb->position - dxb->entries);
if (position_index >= count_left) {
- dx_block->block.dirty = true;
+ ext4_dir_set_dx_csum(
+ ino_ref,
+ (struct ext4_dir_en *)
+ dxb->b.data);
+ ext4_bcache_set_dirty(dxb->b.buf);
- struct ext4_block block_tmp = dx_block->block;
+ struct ext4_block block_tmp = dxb->b;
- dx_block->block = new_block;
+ dxb->b = b;
- dx_block->position =
- new_entries + position_index - count_left;
- dx_block->entries = new_entries;
+ dxb->position =
+ new_en + position_index - count_left;
+ dxb->entries = new_en;
- new_block = block_tmp;
+ b = block_tmp;
}
/* Finally insert new entry */
- ext4_dir_dx_insert_entry(dx_blocks, hash_right,
- new_iblock);
- dx_blocks[0].block.dirty = true;
- dx_blocks[1].block.dirty = true;
-
- new_block.dirty = true;
- return ext4_block_set(inode_ref->fs->bdev, &new_block);
+ ext4_dir_dx_insert_entry(ino_ref, dx_blks, hash_right,
+ new_iblk);
+ ext4_dir_set_dx_csum(ino_ref, (void*)dx_blks[0].b.data);
+ ext4_dir_set_dx_csum(ino_ref, (void*)dx_blks[1].b.data);
+ ext4_bcache_set_dirty(dx_blks[0].b.buf);
+ ext4_bcache_set_dirty(dx_blks[1].b.buf);
+
+ ext4_dir_set_dx_csum(ino_ref, (void *)b.data);
+ ext4_bcache_set_dirty(b.buf);
+ return ext4_block_set(ino_ref->fs->bdev, &b);
} else {
- /* Create second level index */
-
+ size_t sz;
/* Copy data from root to child block */
- memcpy((void *)new_entries, (void *)entries,
- leaf_count *
- sizeof(struct ext4_directory_dx_entry));
-
- struct ext4_directory_dx_countlimit *new_countlimit =
- (struct ext4_directory_dx_countlimit *)new_entries;
-
- uint32_t entry_space =
- block_size -
- sizeof(struct ext4_fake_directory_entry);
- uint32_t node_limit =
- entry_space /
- sizeof(struct ext4_directory_dx_entry);
- ext4_dir_dx_countlimit_set_limit(new_countlimit,
- node_limit);
+ sz = leaf_count * sizeof(struct ext4_dir_idx_entry);
+ memcpy(new_en, e, sz);
- /* Set values in root node */
- struct ext4_directory_dx_countlimit
- *new_root_countlimit =
- (struct ext4_directory_dx_countlimit *)entries;
+ struct ext4_dir_idx_climit *new_climit = (void*)new_en;
+ if (meta_csum)
+ entry_space -= sizeof(struct ext4_dir_idx_tail);
- ext4_dir_dx_countlimit_set_count(new_root_countlimit,
- 1);
- ext4_dir_dx_entry_set_block(entries, new_iblock);
+ ext4_dir_dx_climit_set_limit(new_climit, node_limit);
- ((struct ext4_directory_dx_root *)dx_blocks[0]
- .block.data)
- ->info.indirect_levels = 1;
+ /* Set values in root node */
+ struct ext4_dir_idx_climit *new_root_climit = (void *)e;
- /* Add new entry to the path */
- dx_block = dx_blocks + 1;
- dx_block->position =
- dx_blocks->position - entries + new_entries;
- dx_block->entries = new_entries;
- dx_block->block = new_block;
+ ext4_dir_dx_climit_set_count(new_root_climit, 1);
+ ext4_dir_dx_entry_set_block(e, new_iblk);
- *new_dx_block = dx_block;
+ struct ext4_dir_idx_root *r = (void *)dx_blks[0].b.data;
+ r->info.indirect_levels = 1;
- dx_blocks[0].block.dirty = true;
- dx_blocks[1].block.dirty = true;
+ /* Add new entry to the path */
+ dxb = dx_blks + 1;
+ dxb->position = dx_blks->position - e + new_en;
+ dxb->entries = new_en;
+ dxb->b = b;
+ *new_dx_block = dxb;
+
+ ext4_dir_set_dx_csum(ino_ref, (void*)dx_blks[0].b.data);
+ ext4_dir_set_dx_csum(ino_ref, (void*)dx_blks[1].b.data);
+ ext4_bcache_set_dirty(dx_blks[0].b.buf);
+ ext4_bcache_set_dirty(dx_blks[1].b.buf);
}
}
struct ext4_inode_ref *child, const char *name)
{
int rc2 = EOK;
-
+ int r;
/* Get direct block 0 (index root) */
- uint32_t root_block_addr;
- int rc =
- ext4_fs_get_inode_data_block_index(parent, 0, &root_block_addr);
- if (rc != EOK)
- return rc;
+ ext4_fsblk_t rblock_addr;
+ r = ext4_fs_get_inode_dblk_idx(parent, 0, &rblock_addr, false);
+ if (r != EOK)
+ return r;
struct ext4_fs *fs = parent->fs;
- struct ext4_block root_block;
-
- rc = ext4_block_get(fs->bdev, &root_block, root_block_addr);
- if (rc != EOK)
- return rc;
+ struct ext4_block root_blk;
+
+ r = ext4_block_get(fs->bdev, &root_blk, rblock_addr);
+ if (r != EOK)
+ return r;
+
+ if (!ext4_dir_dx_csum_verify(parent, (void*)root_blk.data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree root checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ parent->index,
+ (uint32_t)0);
+ }
/* Initialize hinfo structure (mainly compute hash) */
uint32_t name_len = strlen(name);
struct ext4_hash_info hinfo;
- rc = ext4_dir_hinfo_init(&hinfo, &root_block, &fs->sb, name_len, name);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &root_block);
+ r = ext4_dir_hinfo_init(&hinfo, &root_blk, &fs->sb, name_len, name);
+ if (r != EOK) {
+ ext4_block_set(fs->bdev, &root_blk);
return EXT4_ERR_BAD_DX_DIR;
}
* Hardcoded number 2 means maximum height of index
* tree defined in Linux.
*/
- struct ext4_directory_dx_block dx_blocks[2];
- struct ext4_directory_dx_block *dx_block;
- struct ext4_directory_dx_block *dx_it;
+ struct ext4_dir_idx_block dx_blks[2];
+ struct ext4_dir_idx_block *dx_blk;
+ struct ext4_dir_idx_block *dx_it;
- rc = ext4_dir_dx_get_leaf(&hinfo, parent, &root_block, &dx_block,
- dx_blocks);
- if (rc != EOK) {
- rc = EXT4_ERR_BAD_DX_DIR;
+ r = ext4_dir_dx_get_leaf(&hinfo, parent, &root_blk, &dx_blk, dx_blks);
+ if (r != EOK) {
+ r = EXT4_ERR_BAD_DX_DIR;
goto release_index;
}
/* Try to insert to existing data block */
- uint32_t leaf_block_idx =
- ext4_dir_dx_entry_get_block(dx_block->position);
- uint32_t leaf_block_addr;
- rc = ext4_fs_get_inode_data_block_index(parent, leaf_block_idx,
- &leaf_block_addr);
- if (rc != EOK)
+ uint32_t leaf_block_idx = ext4_dir_dx_entry_get_block(dx_blk->position);
+ ext4_fsblk_t leaf_block_addr;
+ r = ext4_fs_get_inode_dblk_idx(parent, leaf_block_idx,
+ &leaf_block_addr, false);
+ if (r != EOK)
goto release_index;
/*
* Check if there is needed to split index node
* (and recursively also parent nodes)
*/
- rc = ext4_dir_dx_split_index(parent, dx_blocks, dx_block, &dx_block);
- if (rc != EOK)
+ r = ext4_dir_dx_split_index(parent, dx_blks, dx_blk, &dx_blk);
+ if (r != EOK)
goto release_target_index;
struct ext4_block target_block;
- rc = ext4_block_get(fs->bdev, &target_block, leaf_block_addr);
- if (rc != EOK)
+ r = ext4_block_get(fs->bdev, &target_block, leaf_block_addr);
+ if (r != EOK)
goto release_index;
+ if (!ext4_dir_csum_verify(parent,(void *)target_block.data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree leaf block checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ parent->index,
+ leaf_block_idx);
+ }
+
/* Check if insert operation passed */
- rc = ext4_dir_try_insert_entry(&fs->sb, &target_block, child, name,
- name_len);
- if (rc == EOK)
+ r = ext4_dir_try_insert_entry(&fs->sb, parent, &target_block, child,
+ name, name_len);
+ if (r == EOK)
goto release_target_index;
/* Split entries to two blocks (includes sorting by hash value) */
struct ext4_block new_block;
- rc = ext4_dir_dx_split_data(parent, &hinfo, &target_block, dx_block,
+ r = ext4_dir_dx_split_data(parent, &hinfo, &target_block, dx_blk,
&new_block);
- if (rc != EOK) {
- rc2 = rc;
+ if (r != EOK) {
+ rc2 = r;
goto release_target_index;
}
/* Where to save new entry */
- uint32_t new_block_hash =
- ext4_dir_dx_entry_get_hash(dx_block->position + 1);
- if (hinfo.hash >= new_block_hash)
- rc = ext4_dir_try_insert_entry(&fs->sb, &new_block, child, name,
- name_len);
+ uint32_t blk_hash = ext4_dir_dx_entry_get_hash(dx_blk->position + 1);
+ if (hinfo.hash >= blk_hash)
+ r = ext4_dir_try_insert_entry(&fs->sb, parent, &new_block,
+ child, name, name_len);
else
- rc = ext4_dir_try_insert_entry(&fs->sb, &target_block, child,
- name, name_len);
+ r = ext4_dir_try_insert_entry(&fs->sb, parent, &target_block,
+ child, name, name_len);
/* Cleanup */
- rc = ext4_block_set(fs->bdev, &new_block);
- if (rc != EOK)
- return rc;
+ r = ext4_block_set(fs->bdev, &new_block);
+ if (r != EOK)
+ return r;
/* Cleanup operations */
release_target_index:
- rc2 = rc;
+ rc2 = r;
- rc = ext4_block_set(fs->bdev, &target_block);
- if (rc != EOK)
- return rc;
+ r = ext4_block_set(fs->bdev, &target_block);
+ if (r != EOK)
+ return r;
release_index:
- if (rc != EOK)
- rc2 = rc;
+ if (r != EOK)
+ rc2 = r;
- dx_it = dx_blocks;
+ dx_it = dx_blks;
- while (dx_it <= dx_block) {
- rc = ext4_block_set(fs->bdev, &dx_it->block);
- if (rc != EOK)
- return rc;
+ while (dx_it <= dx_blk) {
+ r = ext4_block_set(fs->bdev, &dx_it->b);
+ if (r != EOK)
+ return r;
dx_it++;
}
uint32_t parent_inode)
{
/* Load block 0, where will be index root located */
- uint32_t fblock;
- int rc = ext4_fs_get_inode_data_block_index(dir, 0, &fblock);
+ ext4_fsblk_t fblock;
+ int rc = ext4_fs_get_inode_dblk_idx(dir, 0, &fblock, false);
if (rc != EOK)
return rc;
if (rc != EOK)
return rc;
+ if (!ext4_dir_dx_csum_verify(dir, (void *)block.data)) {
+ ext4_dbg(DEBUG_DIR_IDX,
+ DBG_WARN "HTree root checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ dir->index,
+ (uint32_t)0);
+ }
+
/* Initialize pointers to data structures */
- struct ext4_directory_dx_root *root = (void *)block.data;
+ struct ext4_dir_idx_root *root = (void *)block.data;
/* Fill the inode field with a new parent ino. */
- ext4_dx_dot_entry_set_inode(&root->dots[1], parent_inode);
+ ext4_dx_dot_en_set_inode(&root->dots[1], parent_inode);
- block.dirty = true;
+ ext4_dir_set_dx_csum(dir, (void *)block.data);
+ ext4_bcache_set_dirty(block.buf);
return ext4_block_set(dir->fs->bdev, &block);
}
projects / lwext4.git / blobdiff