From cdccc69c62579b0c13b35fad0728079652b8f3c9 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Tue, 31 Jan 2023 11:21:30 +0100 Subject: Move library source into src sub-directory Signed-off-by: David Oberhollenzer --- lib/sqfs/xattr/xattr_reader.c | 336 ------------------------------------------ 1 file changed, 336 deletions(-) delete mode 100644 lib/sqfs/xattr/xattr_reader.c (limited to 'lib/sqfs/xattr/xattr_reader.c') diff --git a/lib/sqfs/xattr/xattr_reader.c b/lib/sqfs/xattr/xattr_reader.c deleted file mode 100644 index 9e3ea76..0000000 --- a/lib/sqfs/xattr/xattr_reader.c +++ /dev/null @@ -1,336 +0,0 @@ -/* SPDX-License-Identifier: LGPL-3.0-or-later */ -/* - * xattr_reader.c - * - * Copyright (C) 2019 David Oberhollenzer - */ -#define SQFS_BUILDING_DLL -#include "config.h" - -#include "sqfs/xattr_reader.h" -#include "sqfs/meta_reader.h" -#include "sqfs/super.h" -#include "sqfs/xattr.h" -#include "sqfs/error.h" -#include "sqfs/block.h" -#include "sqfs/io.h" -#include "util/util.h" - -#include -#include -#include - -struct sqfs_xattr_reader_t { - sqfs_object_t base; - - sqfs_u64 xattr_start; - sqfs_u64 xattr_end; - - size_t num_id_blocks; - size_t num_ids; - - sqfs_u64 *id_block_starts; - - sqfs_meta_reader_t *idrd; - sqfs_meta_reader_t *kvrd; -}; - -static sqfs_object_t *xattr_reader_copy(const sqfs_object_t *obj) -{ - const sqfs_xattr_reader_t *xr = (const sqfs_xattr_reader_t *)obj; - sqfs_xattr_reader_t *copy = malloc(sizeof(*copy)); - - if (copy == NULL) - return NULL; - - memcpy(copy, xr, sizeof(*xr)); - - if (xr->kvrd != NULL) { - copy->kvrd = sqfs_copy(xr->kvrd); - if (copy->kvrd == NULL) - goto fail; - } - - if (xr->idrd != NULL) { - copy->idrd = sqfs_copy(xr->idrd); - if (copy->idrd == NULL) - goto fail; - } - - if (xr->id_block_starts != NULL) { - copy->id_block_starts = alloc_array(sizeof(sqfs_u64), - xr->num_id_blocks); - if (copy->id_block_starts == NULL) - goto fail; - - memcpy(copy->id_block_starts, xr->id_block_starts, - sizeof(sqfs_u64) * xr->num_id_blocks); - } - - return (sqfs_object_t *)copy; -fail: - sqfs_drop(copy->idrd); - sqfs_drop(copy->kvrd); - free(copy); - return NULL; -} - -static void xattr_reader_destroy(sqfs_object_t *obj) -{ - sqfs_xattr_reader_t *xr = (sqfs_xattr_reader_t *)obj; - - sqfs_drop(xr->kvrd); - sqfs_drop(xr->idrd); - free(xr->id_block_starts); - free(xr); -} - -int sqfs_xattr_reader_load(sqfs_xattr_reader_t *xr, const sqfs_super_t *super, - sqfs_file_t *file, sqfs_compressor_t *cmp) -{ - sqfs_xattr_id_table_t idtbl; - size_t i; - int err; - - /* sanity check */ - if (super->flags & SQFS_FLAG_NO_XATTRS) - return 0; - - if (super->xattr_id_table_start == 0xFFFFFFFFFFFFFFFF) - return 0; - - if (super->xattr_id_table_start >= super->bytes_used) - return SQFS_ERROR_OUT_OF_BOUNDS; - - /* cleanup pre-existing data */ - xr->idrd = sqfs_drop(xr->idrd); - xr->kvrd = sqfs_drop(xr->kvrd); - - free(xr->id_block_starts); - xr->id_block_starts = NULL; - - /* read the locations table */ - err = file->read_at(file, super->xattr_id_table_start, - &idtbl, sizeof(idtbl)); - if (err) - return err; - - xr->xattr_start = le64toh(idtbl.xattr_table_start); - xr->num_ids = le32toh(idtbl.xattr_ids); - xr->num_id_blocks = - (xr->num_ids * sizeof(sqfs_xattr_id_t)) / SQFS_META_BLOCK_SIZE; - - if ((xr->num_ids * sizeof(sqfs_xattr_id_t)) % SQFS_META_BLOCK_SIZE) - xr->num_id_blocks += 1; - - xr->id_block_starts = alloc_array(sizeof(sqfs_u64), xr->num_id_blocks); - if (xr->id_block_starts == NULL) { - if (errno == EOVERFLOW) - return SQFS_ERROR_OVERFLOW; - return SQFS_ERROR_ALLOC; - } - - err = file->read_at(file, super->xattr_id_table_start + sizeof(idtbl), - xr->id_block_starts, - sizeof(sqfs_u64) * xr->num_id_blocks); - if (err) - goto fail_blocks; - - for (i = 0; i < xr->num_id_blocks; ++i) { - xr->id_block_starts[i] = le64toh(xr->id_block_starts[i]); - - if (xr->id_block_starts[i] > super->bytes_used) { - err = SQFS_ERROR_OUT_OF_BOUNDS; - goto fail_blocks; - } - } - - /* create the meta data readers */ - xr->idrd = sqfs_meta_reader_create(file, cmp, super->id_table_start, - super->bytes_used); - if (xr->idrd == NULL) - goto fail_blocks; - - xr->kvrd = sqfs_meta_reader_create(file, cmp, super->id_table_start, - super->bytes_used); - if (xr->kvrd == NULL) - goto fail_idrd; - - xr->xattr_end = super->bytes_used; - return 0; -fail_idrd: - xr->idrd = sqfs_drop(xr->idrd); -fail_blocks: - free(xr->id_block_starts); - xr->id_block_starts = NULL; - return err; -} - -int sqfs_xattr_reader_read_key(sqfs_xattr_reader_t *xr, - sqfs_xattr_entry_t **key_out) -{ - sqfs_xattr_entry_t key, *out; - const char *prefix; - size_t plen, total; - int ret; - - ret = sqfs_meta_reader_read(xr->kvrd, &key, sizeof(key)); - if (ret) - return ret; - - key.type = le16toh(key.type); - key.size = le16toh(key.size); - - prefix = sqfs_get_xattr_prefix(key.type & SQFS_XATTR_PREFIX_MASK); - if (prefix == NULL) - return SQFS_ERROR_UNSUPPORTED; - - plen = strlen(prefix); - - if (SZ_ADD_OV(plen, key.size, &total) || SZ_ADD_OV(total, 1, &total) || - SZ_ADD_OV(sizeof(*out), total, &total)) { - return SQFS_ERROR_OVERFLOW; - } - - out = calloc(1, total); - if (out == NULL) - return SQFS_ERROR_ALLOC; - - *out = key; - memcpy(out->key, prefix, plen); - - ret = sqfs_meta_reader_read(xr->kvrd, out->key + plen, key.size); - if (ret) { - free(out); - return ret; - } - - *key_out = out; - return 0; -} - -int sqfs_xattr_reader_read_value(sqfs_xattr_reader_t *xr, - const sqfs_xattr_entry_t *key, - sqfs_xattr_value_t **val_out) -{ - size_t offset, new_offset, size; - sqfs_xattr_value_t value, *out; - sqfs_u64 ref, start, new_start; - int ret; - - ret = sqfs_meta_reader_read(xr->kvrd, &value, sizeof(value)); - if (ret) - return ret; - - if (key->type & SQFS_XATTR_FLAG_OOL) { - ret = sqfs_meta_reader_read(xr->kvrd, &ref, sizeof(ref)); - if (ret) - return ret; - - sqfs_meta_reader_get_position(xr->kvrd, &start, &offset); - - new_start = xr->xattr_start + (ref >> 16); - if (new_start >= xr->xattr_end) - return SQFS_ERROR_OUT_OF_BOUNDS; - - new_offset = ref & 0xFFFF; - if (new_offset >= SQFS_META_BLOCK_SIZE) - return SQFS_ERROR_OUT_OF_BOUNDS; - - ret = sqfs_meta_reader_seek(xr->kvrd, new_start, new_offset); - if (ret) - return ret; - - ret = sqfs_meta_reader_read(xr->kvrd, &value, sizeof(value)); - if (ret) - return ret; - } - - value.size = le32toh(value.size); - - if (SZ_ADD_OV(sizeof(*out), value.size, &size) || - SZ_ADD_OV(size, 1, &size)) { - return SQFS_ERROR_OVERFLOW; - } - - out = calloc(1, size); - if (out == NULL) - return SQFS_ERROR_ALLOC; - - *out = value; - - ret = sqfs_meta_reader_read(xr->kvrd, out->value, value.size); - if (ret) - goto fail; - - if (key->type & SQFS_XATTR_FLAG_OOL) { - ret = sqfs_meta_reader_seek(xr->kvrd, start, offset); - if (ret) - goto fail; - } - - *val_out = out; - return 0; -fail: - free(out); - return ret; -} - -int sqfs_xattr_reader_seek_kv(sqfs_xattr_reader_t *xr, - const sqfs_xattr_id_t *desc) -{ - sqfs_u32 offset = desc->xattr & 0xFFFF; - sqfs_u64 block = xr->xattr_start + (desc->xattr >> 16); - - return sqfs_meta_reader_seek(xr->kvrd, block, offset); -} - -int sqfs_xattr_reader_get_desc(sqfs_xattr_reader_t *xr, sqfs_u32 idx, - sqfs_xattr_id_t *desc) -{ - size_t block, offset; - int ret; - - memset(desc, 0, sizeof(*desc)); - - if (idx == 0xFFFFFFFF) - return 0; - - if (xr->kvrd == NULL || xr->idrd == NULL) - return idx == 0 ? 0 : SQFS_ERROR_OUT_OF_BOUNDS; - - if (idx >= xr->num_ids) - return SQFS_ERROR_OUT_OF_BOUNDS; - - offset = (idx * sizeof(*desc)) % SQFS_META_BLOCK_SIZE; - block = (idx * sizeof(*desc)) / SQFS_META_BLOCK_SIZE; - - ret = sqfs_meta_reader_seek(xr->idrd, xr->id_block_starts[block], - offset); - if (ret) - return ret; - - ret = sqfs_meta_reader_read(xr->idrd, desc, sizeof(*desc)); - if (ret) - return ret; - - desc->xattr = le64toh(desc->xattr); - desc->count = le32toh(desc->count); - desc->size = le32toh(desc->size); - return 0; -} - -sqfs_xattr_reader_t *sqfs_xattr_reader_create(sqfs_u32 flags) -{ - sqfs_xattr_reader_t *xr; - - if (flags != 0) - return NULL; - - xr = calloc(1, sizeof(*xr)); - if (xr == NULL) - return NULL; - - sqfs_object_init(xr, xattr_reader_destroy, xattr_reader_copy); - return xr; -} -- cgit v1.2.3