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Diffstat (limited to 'e2fsck/rehash.c')
-rw-r--r--e2fsck/rehash.c76
1 files changed, 61 insertions, 15 deletions
diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
index a5fc1be1..17ab1843 100644
--- a/e2fsck/rehash.c
+++ b/e2fsck/rehash.c
@@ -101,6 +101,21 @@ struct out_dir {
ext2_dirhash_t *hashes;
};
+#define DOTDOT_OFFSET 12
+
+static int is_fake_entry(ext2_filsys fs, int lblk, unsigned int offset)
+{
+ /* Entries in the first block before this value refer to . or .. */
+ if (lblk == 0 && offset <= DOTDOT_OFFSET)
+ return 1;
+ /* Check if this is likely the csum entry */
+ if (ext2fs_has_feature_metadata_csum(fs->super) &&
+ (offset & (fs->blocksize - 1)) ==
+ fs->blocksize - sizeof(struct ext2_dir_entry_tail))
+ return 1;
+ return 0;
+}
+
static int fill_dir_block(ext2_filsys fs,
blk64_t *block_nr,
e2_blkcnt_t blockcnt,
@@ -113,7 +128,7 @@ static int fill_dir_block(ext2_filsys fs,
struct ext2_dir_entry *dirent;
char *dir;
unsigned int offset, dir_offset, rec_len, name_len;
- int hash_alg, hash_flags;
+ int hash_alg, hash_flags, hash_in_entry;
if (blockcnt < 0)
return 0;
@@ -140,6 +155,7 @@ static int fill_dir_block(ext2_filsys fs,
return BLOCK_ABORT;
}
hash_flags = fd->inode->i_flags & EXT4_CASEFOLD_FL;
+ hash_in_entry = ext4_hash_in_dirent(fd->inode);
hash_alg = fs->super->s_def_hash_version;
if ((hash_alg <= EXT2_HASH_TEA) &&
(fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
@@ -147,13 +163,18 @@ static int fill_dir_block(ext2_filsys fs,
/* While the directory block is "hot", index it. */
dir_offset = 0;
while (dir_offset < fs->blocksize) {
+ int min_rec = EXT2_DIR_ENTRY_HEADER_LEN;
+ int extended = hash_in_entry && !is_fake_entry(fs, blockcnt, dir_offset);
+
+ if (extended)
+ min_rec += EXT2_DIR_ENTRY_HASH_LEN;
dirent = (struct ext2_dir_entry *) (dir + dir_offset);
(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
name_len = ext2fs_dirent_name_len(dirent);
if (((dir_offset + rec_len) > fs->blocksize) ||
- (rec_len < 8) ||
+ (rec_len < min_rec) ||
((rec_len % 4) != 0) ||
- (name_len + 8 > rec_len)) {
+ (name_len + min_rec > rec_len)) {
fd->err = EXT2_ET_DIR_CORRUPTED;
return BLOCK_ABORT;
}
@@ -180,11 +201,14 @@ static int fill_dir_block(ext2_filsys fs,
}
ent = fd->harray + fd->num_array++;
ent->dir = dirent;
- fd->dir_size += EXT2_DIR_REC_LEN(name_len);
+ fd->dir_size += ext2fs_dir_rec_len(name_len, extended);
ent->ino = dirent->inode;
- if (fd->compress)
+ if (extended) {
+ ent->hash = EXT2_DIRENT_HASH(dirent);
+ ent->minor_hash = EXT2_DIRENT_MINOR_HASH(dirent);
+ } else if (fd->compress) {
ent->hash = ent->minor_hash = 0;
- else {
+ } else {
fd->err = ext2fs_dirhash2(hash_alg,
dirent->name, name_len,
fs->encoding, hash_flags,
@@ -400,6 +424,15 @@ static int duplicate_search_and_fix(e2fsck_t ctx, ext2_filsys fs,
fixed++;
continue;
}
+ /* Can't alter encrypted name without key, so just drop it */
+ if (fd->inode->i_flags & EXT4_ENCRYPT_FL) {
+ if (fix_problem(ctx, PR_2_NON_UNIQUE_FILE_NO_RENAME, &pctx)) {
+ e2fsck_adjust_inode_count(ctx, ent->dir->inode, -1);
+ ent->dir->inode = 0;
+ fixed++;
+ continue;
+ }
+ }
new_len = ext2fs_dirent_name_len(ent->dir);
memcpy(new_name, ent->dir->name, new_len);
mutate_name(new_name, &new_len);
@@ -443,6 +476,8 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
ext2_dirhash_t prev_hash;
int csum_size = 0;
struct ext2_dir_entry_tail *t;
+ int hash_in_entry = ext4_hash_in_dirent(fd->inode);
+ int min_rec_len = ext2fs_dir_rec_len(1, hash_in_entry);
if (ctx->htree_slack_percentage == 255) {
profile_get_uint(ctx->profile, "options",
@@ -471,15 +506,16 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
prev_rec_len = 0;
rec_len = 0;
left = fs->blocksize - csum_size;
- slack = fd->compress ? 12 :
+ slack = fd->compress ? min_rec_len :
((fs->blocksize - csum_size) * ctx->htree_slack_percentage)/100;
- if (slack < 12)
- slack = 12;
+ if (slack < min_rec_len)
+ slack = min_rec_len;
for (i = 0; i < fd->num_array; i++) {
ent = fd->harray + i;
if (ent->dir->inode == 0)
continue;
- rec_len = EXT2_DIR_REC_LEN(ext2fs_dirent_name_len(ent->dir));
+ rec_len = ext2fs_dir_rec_len(ext2fs_dirent_name_len(ent->dir),
+ hash_in_entry);
if (rec_len > left) {
if (left) {
left += prev_rec_len;
@@ -516,6 +552,11 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
prev_rec_len = rec_len;
memcpy(dirent->name, ent->dir->name,
ext2fs_dirent_name_len(dirent));
+ if (hash_in_entry) {
+ EXT2_DIRENT_HASHES(dirent)->hash = ext2fs_cpu_to_le32(ent->hash);
+ EXT2_DIRENT_HASHES(dirent)->minor_hash =
+ ext2fs_cpu_to_le32(ent->minor_hash);
+ }
offset += rec_len;
left -= rec_len;
if (left < slack) {
@@ -540,7 +581,8 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
static struct ext2_dx_root_info *set_root_node(ext2_filsys fs, char *buf,
- ext2_ino_t ino, ext2_ino_t parent)
+ ext2_ino_t ino, ext2_ino_t parent,
+ struct ext2_inode *inode)
{
struct ext2_dir_entry *dir;
struct ext2_dx_root_info *root;
@@ -568,7 +610,10 @@ static struct ext2_dx_root_info *set_root_node(ext2_filsys fs, char *buf,
root = (struct ext2_dx_root_info *) (buf+24);
root->reserved_zero = 0;
- root->hash_version = fs->super->s_def_hash_version;
+ if (ext4_hash_in_dirent(inode))
+ root->hash_version = EXT2_HASH_SIPHASH;
+ else
+ root->hash_version = fs->super->s_def_hash_version;
root->info_length = 8;
root->indirect_levels = 0;
root->unused_flags = 0;
@@ -651,7 +696,8 @@ static int alloc_blocks(ext2_filsys fs,
static errcode_t calculate_tree(ext2_filsys fs,
struct out_dir *outdir,
ext2_ino_t ino,
- ext2_ino_t parent)
+ ext2_ino_t parent,
+ struct ext2_inode *inode)
{
struct ext2_dx_root_info *root_info;
struct ext2_dx_entry *root, *int_ent, *dx_ent = 0;
@@ -660,7 +706,7 @@ static errcode_t calculate_tree(ext2_filsys fs,
int i, c1, c2, c3, nblks;
int limit_offset, int_offset, root_offset;
- root_info = set_root_node(fs, outdir->buf, ino, parent);
+ root_info = set_root_node(fs, outdir->buf, ino, parent, inode);
root_offset = limit_offset = ((char *) root_info - outdir->buf) +
root_info->info_length;
root_limit = (struct ext2_dx_countlimit *) (outdir->buf + limit_offset);
@@ -951,7 +997,7 @@ resort:
if (!fd.compress) {
/* Calculate the interior nodes */
- retval = calculate_tree(fs, &outdir, ino, fd.parent);
+ retval = calculate_tree(fs, &outdir, ino, fd.parent, fd.inode);
if (retval)
goto errout;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-25 01:30:39 +0000