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Posted to commits@cloudstack.apache.org by al...@apache.org on 2012/08/03 23:33:31 UTC
[7/30] remove vhd-tools directory
http://git-wip-us.apache.org/repos/asf/incubator-cloudstack/blob/e9a74959/tools/vhd-tools/vhd/lib/libvhd-journal.c
----------------------------------------------------------------------
diff --git a/tools/vhd-tools/vhd/lib/libvhd-journal.c b/tools/vhd-tools/vhd/lib/libvhd-journal.c
deleted file mode 100644
index 24383ff..0000000
--- a/tools/vhd-tools/vhd/lib/libvhd-journal.c
+++ /dev/null
@@ -1,1534 +0,0 @@
-/* Copyright (c) 2008, XenSource Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of XenSource Inc. nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
- * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-#include <stdio.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-
-#include "atomicio.h"
-#include "libvhd-journal.h"
-
-#define VHD_JOURNAL_ENTRY_TYPE_FOOTER_P 1
-#define VHD_JOURNAL_ENTRY_TYPE_FOOTER_C 2
-#define VHD_JOURNAL_ENTRY_TYPE_HEADER 3
-#define VHD_JOURNAL_ENTRY_TYPE_LOCATOR 4
-#define VHD_JOURNAL_ENTRY_TYPE_BAT 5
-#define VHD_JOURNAL_ENTRY_TYPE_BATMAP_H 6
-#define VHD_JOURNAL_ENTRY_TYPE_BATMAP_M 7
-#define VHD_JOURNAL_ENTRY_TYPE_DATA 8
-
-typedef struct vhd_journal_entry {
- uint64_t cookie;
- uint32_t type;
- uint32_t size;
- uint64_t offset;
- uint32_t checksum;
-} vhd_journal_entry_t;
-
-static inline int
-vhd_journal_seek(vhd_journal_t *j, off_t offset, int whence)
-{
- off_t off;
-
- off = lseek(j->jfd, offset, whence);
- if (off == (off_t)-1)
- return -errno;
-
- return 0;
-}
-
-static inline off_t
-vhd_journal_position(vhd_journal_t *j)
-{
- return lseek(j->jfd, 0, SEEK_CUR);
-}
-
-static inline int
-vhd_journal_read(vhd_journal_t *j, void *buf, size_t size)
-{
- ssize_t ret;
-
- errno = 0;
-
- ret = atomicio(read, j->jfd, buf, size);
- if (ret != size)
- return (errno ? -errno : -EIO);
-
- return 0;
-}
-
-static inline int
-vhd_journal_write(vhd_journal_t *j, void *buf, size_t size)
-{
- ssize_t ret;
-
- errno = 0;
-
- ret = atomicio(vwrite, j->jfd, buf, size);
- if (ret != size)
- return (errno ? -errno : -EIO);
-
- return 0;
-}
-
-static inline int
-vhd_journal_truncate(vhd_journal_t *j, off_t length)
-{
- int err;
-
- err = ftruncate(j->jfd, length);
- if (err == -1)
- return -errno;
-
- return 0;
-}
-
-static inline int
-vhd_journal_sync(vhd_journal_t *j)
-{
- int err;
-
- err = fdatasync(j->jfd);
- if (err)
- return -errno;
-
- return 0;
-}
-
-static inline void
-vhd_journal_header_in(vhd_journal_header_t *header)
-{
- BE64_IN(&header->vhd_footer_offset);
- BE32_IN(&header->journal_data_entries);
- BE32_IN(&header->journal_metadata_entries);
- BE64_IN(&header->journal_data_offset);
- BE64_IN(&header->journal_metadata_offset);
-}
-
-static inline void
-vhd_journal_header_out(vhd_journal_header_t *header)
-{
- BE64_OUT(&header->vhd_footer_offset);
- BE32_OUT(&header->journal_data_entries);
- BE32_OUT(&header->journal_metadata_entries);
- BE64_OUT(&header->journal_data_offset);
- BE64_OUT(&header->journal_metadata_offset);
-}
-
-static int
-vhd_journal_validate_header(vhd_journal_t *j, vhd_journal_header_t *header)
-{
- int err;
- off_t eof;
-
- if (memcmp(header->cookie,
- VHD_JOURNAL_HEADER_COOKIE, sizeof(header->cookie)))
- return -EINVAL;
-
- err = vhd_journal_seek(j, j->header.journal_eof, SEEK_SET);
- if (err)
- return err;
-
- eof = vhd_journal_position(j);
- if (eof == (off_t)-1)
- return -errno;
-
- if (j->header.journal_data_offset > j->header.journal_eof)
- return -EINVAL;
-
- if (j->header.journal_metadata_offset > j->header.journal_eof)
- return -EINVAL;
-
- return 0;
-}
-
-static int
-vhd_journal_read_journal_header(vhd_journal_t *j, vhd_journal_header_t *header)
-{
- int err;
- size_t size;
-
- size = sizeof(vhd_journal_header_t);
- err = vhd_journal_seek(j, 0, SEEK_SET);
- if (err)
- return err;
-
- err = vhd_journal_read(j, header, size);
- if (err)
- return err;
-
- vhd_journal_header_in(header);
-
- return vhd_journal_validate_header(j, header);
-}
-
-static int
-vhd_journal_write_header(vhd_journal_t *j, vhd_journal_header_t *header)
-{
- int err;
- size_t size;
- vhd_journal_header_t h;
-
- memcpy(&h, header, sizeof(vhd_journal_header_t));
-
- err = vhd_journal_validate_header(j, &h);
- if (err)
- return err;
-
- vhd_journal_header_out(&h);
- size = sizeof(vhd_journal_header_t);
-
- err = vhd_journal_seek(j, 0, SEEK_SET);
- if (err)
- return err;
-
- err = vhd_journal_write(j, &h, size);
- if (err)
- return err;
-
- return 0;
-}
-
-static int
-vhd_journal_add_journal_header(vhd_journal_t *j)
-{
- int err;
- off_t off;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
- memset(&j->header, 0, sizeof(vhd_journal_header_t));
-
- err = vhd_seek(vhd, 0, SEEK_END);
- if (err)
- return err;
-
- off = vhd_position(vhd);
- if (off == (off_t)-1)
- return -errno;
-
- err = vhd_get_footer(vhd);
- if (err)
- return err;
-
- blk_uuid_copy(&j->header.uuid, &vhd->footer.uuid);
- memcpy(j->header.cookie,
- VHD_JOURNAL_HEADER_COOKIE, sizeof(j->header.cookie));
- j->header.vhd_footer_offset = off - sizeof(vhd_footer_t);
- j->header.journal_eof = sizeof(vhd_journal_header_t);
-
- return vhd_journal_write_header(j, &j->header);
-}
-
-static void
-vhd_journal_entry_in(vhd_journal_entry_t *entry)
-{
- BE32_IN(&entry->type);
- BE32_IN(&entry->size);
- BE64_IN(&entry->offset);
- BE64_IN(&entry->cookie);
- BE32_IN(&entry->checksum);
-}
-
-static void
-vhd_journal_entry_out(vhd_journal_entry_t *entry)
-{
- BE32_OUT(&entry->type);
- BE32_OUT(&entry->size);
- BE64_OUT(&entry->offset);
- BE64_OUT(&entry->cookie);
- BE32_OUT(&entry->checksum);
-}
-
-static uint32_t
-vhd_journal_checksum_entry(vhd_journal_entry_t *entry, char *buf, size_t size)
-{
- int i;
- unsigned char *blob;
- uint32_t checksum, tmp;
-
- checksum = 0;
- tmp = entry->checksum;
- entry->checksum = 0;
-
- blob = (unsigned char *)entry;
- for (i = 0; i < sizeof(vhd_journal_entry_t); i++)
- checksum += blob[i];
-
- blob = (unsigned char *)buf;
- for (i = 0; i < size; i++)
- checksum += blob[i];
-
- entry->checksum = tmp;
- return ~checksum;
-}
-
-static int
-vhd_journal_validate_entry(vhd_journal_entry_t *entry)
-{
- if (entry->size == 0)
- return -EINVAL;
-
- if (entry->size & (VHD_SECTOR_SIZE - 1))
- return -EINVAL;
-
- if (entry->cookie != VHD_JOURNAL_ENTRY_COOKIE)
- return -EINVAL;
-
- return 0;
-}
-
-static int
-vhd_journal_read_entry(vhd_journal_t *j, vhd_journal_entry_t *entry)
-{
- int err;
-
- err = vhd_journal_read(j, entry, sizeof(vhd_journal_entry_t));
- if (err)
- return err;
-
- vhd_journal_entry_in(entry);
- return vhd_journal_validate_entry(entry);
-}
-
-static int
-vhd_journal_write_entry(vhd_journal_t *j, vhd_journal_entry_t *entry)
-{
- int err;
- vhd_journal_entry_t e;
-
- err = vhd_journal_validate_entry(entry);
- if (err)
- return err;
-
- memcpy(&e, entry, sizeof(vhd_journal_entry_t));
- vhd_journal_entry_out(&e);
-
- err = vhd_journal_write(j, &e, sizeof(vhd_journal_entry_t));
- if (err)
- err;
-
- return 0;
-}
-
-static int
-vhd_journal_validate_entry_data(vhd_journal_entry_t *entry, char *buf)
-{
- int err;
- uint32_t checksum;
-
- err = 0;
- checksum = vhd_journal_checksum_entry(entry, buf, entry->size);
-
- if (checksum != entry->checksum)
- return -EINVAL;
-
- return err;
-}
-
-static int
-vhd_journal_update(vhd_journal_t *j, off_t offset,
- char *buf, size_t size, uint32_t type)
-{
- int err;
- off_t eof;
- uint64_t *off, off_bak;
- uint32_t *entries;
- vhd_journal_entry_t entry;
-
- entry.type = type;
- entry.size = size;
- entry.offset = offset;
- entry.cookie = VHD_JOURNAL_ENTRY_COOKIE;
- entry.checksum = vhd_journal_checksum_entry(&entry, buf, size);
-
- err = vhd_journal_seek(j, j->header.journal_eof, SEEK_SET);
- if (err)
- return err;
-
- err = vhd_journal_write_entry(j, &entry);
- if (err)
- goto fail;
-
- err = vhd_journal_write(j, buf, size);
- if (err)
- goto fail;
-
- if (type == VHD_JOURNAL_ENTRY_TYPE_DATA) {
- off = &j->header.journal_data_offset;
- entries = &j->header.journal_data_entries;
- } else {
- off = &j->header.journal_metadata_offset;
- entries = &j->header.journal_metadata_entries;
- }
-
- off_bak = *off;
- if (!(*entries)++)
- *off = j->header.journal_eof;
- j->header.journal_eof += (size + sizeof(vhd_journal_entry_t));
-
- err = vhd_journal_write_header(j, &j->header);
- if (err) {
- if (!--(*entries))
- *off = off_bak;
- j->header.journal_eof -= (size + sizeof(vhd_journal_entry_t));
- goto fail;
- }
-
- return 0;
-
-fail:
- if (!j->is_block)
- vhd_journal_truncate(j, j->header.journal_eof);
- return err;
-}
-
-static int
-vhd_journal_add_footer(vhd_journal_t *j)
-{
- int err;
- off_t off;
- vhd_context_t *vhd;
- vhd_footer_t footer;
-
- vhd = &j->vhd;
-
- err = vhd_seek(vhd, 0, SEEK_END);
- if (err)
- return err;
-
- off = vhd_position(vhd);
- if (off == (off_t)-1)
- return -errno;
-
- err = vhd_read_footer_at(vhd, &footer, off - sizeof(vhd_footer_t));
- if (err)
- return err;
-
- vhd_footer_out(&footer);
- err = vhd_journal_update(j, off - sizeof(vhd_footer_t),
- (char *)&footer,
- sizeof(vhd_footer_t),
- VHD_JOURNAL_ENTRY_TYPE_FOOTER_P);
- if (err)
- return err;
-
- if (!vhd_type_dynamic(vhd))
- return 0;
-
- err = vhd_read_footer_at(vhd, &footer, 0);
- if (err)
- return err;
-
- vhd_footer_out(&footer);
- err = vhd_journal_update(j, 0,
- (char *)&footer,
- sizeof(vhd_footer_t),
- VHD_JOURNAL_ENTRY_TYPE_FOOTER_C);
-
- return err;
-}
-
-static int
-vhd_journal_add_header(vhd_journal_t *j)
-{
- int err;
- off_t off;
- vhd_context_t *vhd;
- vhd_header_t header;
-
- vhd = &j->vhd;
-
- err = vhd_read_header(vhd, &header);
- if (err)
- return err;
-
- off = vhd->footer.data_offset;
-
- vhd_header_out(&header);
- err = vhd_journal_update(j, off,
- (char *)&header,
- sizeof(vhd_header_t),
- VHD_JOURNAL_ENTRY_TYPE_HEADER);
-
- return err;
-}
-
-static int
-vhd_journal_add_locators(vhd_journal_t *j)
-{
- int i, n, err;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
-
- err = vhd_get_header(vhd);
- if (err)
- return err;
-
- n = sizeof(vhd->header.loc) / sizeof(vhd_parent_locator_t);
- for (i = 0; i < n; i++) {
- char *buf;
- off_t off;
- size_t size;
- vhd_parent_locator_t *loc;
-
- loc = vhd->header.loc + i;
- err = vhd_validate_platform_code(loc->code);
- if (err)
- return err;
-
- if (loc->code == PLAT_CODE_NONE)
- continue;
-
- off = loc->data_offset;
- size = vhd_parent_locator_size(loc);
-
- err = posix_memalign((void **)&buf, VHD_SECTOR_SIZE, size);
- if (err)
- return -err;
-
- err = vhd_seek(vhd, off, SEEK_SET);
- if (err)
- goto end;
-
- err = vhd_read(vhd, buf, size);
- if (err)
- goto end;
-
- err = vhd_journal_update(j, off, buf, size,
- VHD_JOURNAL_ENTRY_TYPE_LOCATOR);
- if (err)
- goto end;
-
- err = 0;
-
- end:
- free(buf);
- if (err)
- break;
- }
-
- return err;
-}
-
-static int
-vhd_journal_add_bat(vhd_journal_t *j)
-{
- int err;
- off_t off;
- size_t size;
- vhd_bat_t bat;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
-
- err = vhd_get_header(vhd);
- if (err)
- return err;
-
- err = vhd_read_bat(vhd, &bat);
- if (err)
- return err;
-
- off = vhd->header.table_offset;
- size = vhd_bytes_padded(bat.entries * sizeof(uint32_t));
-
- vhd_bat_out(&bat);
- err = vhd_journal_update(j, off, (char *)bat.bat, size,
- VHD_JOURNAL_ENTRY_TYPE_BAT);
-
- free(bat.bat);
- return err;
-}
-
-static int
-vhd_journal_add_batmap(vhd_journal_t *j)
-{
- int err;
- off_t off;
- size_t size;
- vhd_context_t *vhd;
- vhd_batmap_t batmap;
-
- vhd = &j->vhd;
-
- err = vhd_batmap_header_offset(vhd, &off);
- if (err)
- return err;
-
- err = vhd_read_batmap(vhd, &batmap);
- if (err)
- return err;
-
- size = vhd_bytes_padded(sizeof(struct dd_batmap_hdr));
-
- vhd_batmap_header_out(&batmap);
- err = vhd_journal_update(j, off, (char *)&batmap.header, size,
- VHD_JOURNAL_ENTRY_TYPE_BATMAP_H);
- if (err)
- goto out;
-
- vhd_batmap_header_in(&batmap);
- off = batmap.header.batmap_offset;
- size = vhd_sectors_to_bytes(batmap.header.batmap_size);
-
- err = vhd_journal_update(j, off, batmap.map, size,
- VHD_JOURNAL_ENTRY_TYPE_BATMAP_M);
-
-out:
- free(batmap.map);
- return err;
-}
-
-static int
-vhd_journal_add_metadata(vhd_journal_t *j)
-{
- int err;
- off_t eof;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
-
- err = vhd_journal_add_footer(j);
- if (err)
- return err;
-
- if (!vhd_type_dynamic(vhd))
- return 0;
-
- err = vhd_journal_add_header(j);
- if (err)
- return err;
-
- err = vhd_journal_add_locators(j);
- if (err)
- return err;
-
- err = vhd_journal_add_bat(j);
- if (err)
- return err;
-
- if (vhd_has_batmap(vhd)) {
- err = vhd_journal_add_batmap(j);
- if (err)
- return err;
- }
-
- j->header.journal_data_offset = j->header.journal_eof;
- return vhd_journal_write_header(j, &j->header);
-}
-
-static int
-__vhd_journal_read_footer(vhd_journal_t *j,
- vhd_footer_t *footer, uint32_t type)
-{
- int err;
- vhd_journal_entry_t entry;
-
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- return err;
-
- if (entry.type != type)
- return -EINVAL;
-
- if (entry.size != sizeof(vhd_footer_t))
- return -EINVAL;
-
- err = vhd_journal_read(j, footer, entry.size);
- if (err)
- return err;
-
- vhd_footer_in(footer);
- return vhd_validate_footer(footer);
-}
-
-static int
-vhd_journal_read_footer(vhd_journal_t *j, vhd_footer_t *footer)
-{
- return __vhd_journal_read_footer(j, footer,
- VHD_JOURNAL_ENTRY_TYPE_FOOTER_P);
-}
-
-static int
-vhd_journal_read_footer_copy(vhd_journal_t *j, vhd_footer_t *footer)
-{
- return __vhd_journal_read_footer(j, footer,
- VHD_JOURNAL_ENTRY_TYPE_FOOTER_C);
-}
-
-static int
-vhd_journal_read_header(vhd_journal_t *j, vhd_header_t *header)
-{
- int err;
- vhd_journal_entry_t entry;
-
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- return err;
-
- if (entry.type != VHD_JOURNAL_ENTRY_TYPE_HEADER)
- return -EINVAL;
-
- if (entry.size != sizeof(vhd_header_t))
- return -EINVAL;
-
- err = vhd_journal_read(j, header, entry.size);
- if (err)
- return err;
-
- vhd_header_in(header);
- return vhd_validate_header(header);
-}
-
-static int
-vhd_journal_read_locators(vhd_journal_t *j, char ***locators, int *locs)
-{
- int err, n, _locs;
- char **_locators, *buf;
- off_t pos;
- vhd_journal_entry_t entry;
-
- _locs = 0;
- *locs = 0;
- *locators = NULL;
-
- n = sizeof(j->vhd.header.loc) / sizeof(vhd_parent_locator_t);
- _locators = calloc(n, sizeof(char *));
- if (!_locators)
- return -ENOMEM;
-
- for (;;) {
- buf = NULL;
-
- pos = vhd_journal_position(j);
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- goto fail;
-
- if (entry.type != VHD_JOURNAL_ENTRY_TYPE_LOCATOR) {
- err = vhd_journal_seek(j, pos, SEEK_SET);
- if (err)
- goto fail;
- break;
- }
-
- if (_locs >= n) {
- err = -EINVAL;
- goto fail;
- }
-
- err = posix_memalign((void **)&buf,
- VHD_SECTOR_SIZE, entry.size);
- if (err) {
- err = -err;
- buf = NULL;
- goto fail;
- }
-
- err = vhd_journal_read(j, buf, entry.size);
- if (err)
- goto fail;
-
- _locators[_locs++] = buf;
- err = 0;
- }
-
-
- *locs = _locs;
- *locators = _locators;
-
- return 0;
-
-fail:
- if (_locators) {
- for (n = 0; n < _locs; n++)
- free(_locators[n]);
- free(_locators);
- }
- return err;
-}
-
-static int
-vhd_journal_read_bat(vhd_journal_t *j, vhd_bat_t *bat)
-{
- int err;
- size_t size;
- vhd_context_t *vhd;
- vhd_journal_entry_t entry;
-
- vhd = &j->vhd;
-
- size = vhd_bytes_padded(vhd->header.max_bat_size * sizeof(uint32_t));
-
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- return err;
-
- if (entry.type != VHD_JOURNAL_ENTRY_TYPE_BAT)
- return -EINVAL;
-
- if (entry.size != size)
- return -EINVAL;
-
- if (entry.offset != vhd->header.table_offset)
- return -EINVAL;
-
- err = posix_memalign((void **)&bat->bat, VHD_SECTOR_SIZE, size);
- if (err)
- return -err;
-
- err = vhd_journal_read(j, bat->bat, entry.size);
- if (err)
- goto fail;
-
- bat->spb = vhd->header.block_size >> VHD_SECTOR_SHIFT;
- bat->entries = vhd->header.max_bat_size;
- vhd_bat_in(bat);
-
- return 0;
-
-fail:
- free(bat->bat);
- bat->bat = NULL;
- return err;
-}
-
-static int
-vhd_journal_read_batmap_header(vhd_journal_t *j, vhd_batmap_t *batmap)
-{
- int err;
- char *buf;
- size_t size;
- vhd_journal_entry_t entry;
-
- size = vhd_bytes_padded(sizeof(struct dd_batmap_hdr));
-
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- return err;
-
- if (entry.type != VHD_JOURNAL_ENTRY_TYPE_BATMAP_H)
- return -EINVAL;
-
- if (entry.size != size)
- return -EINVAL;
-
- err = posix_memalign((void **)&buf, VHD_SECTOR_SIZE, size);
- if (err)
- return err;
-
- err = vhd_journal_read(j, buf, entry.size);
- if (err) {
- free(buf);
- return err;
- }
-
- memcpy(&batmap->header, buf, sizeof(batmap->header));
-
- vhd_batmap_header_in(batmap);
- return vhd_validate_batmap_header(batmap);
-}
-
-static int
-vhd_journal_read_batmap_map(vhd_journal_t *j, vhd_batmap_t *batmap)
-{
- int err;
- vhd_journal_entry_t entry;
-
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- return err;
-
- if (entry.type != VHD_JOURNAL_ENTRY_TYPE_BATMAP_M)
- return -EINVAL;
-
- if (entry.size != vhd_sectors_to_bytes(batmap->header.batmap_size))
- return -EINVAL;
-
- if (entry.offset != batmap->header.batmap_offset)
- return -EINVAL;
-
- err = posix_memalign((void **)&batmap->map,
- VHD_SECTOR_SIZE, entry.size);
- if (err)
- return -err;
-
- err = vhd_journal_read(j, batmap->map, entry.size);
- if (err) {
- free(batmap->map);
- batmap->map = NULL;
- return err;
- }
-
- return 0;
-}
-
-static int
-vhd_journal_read_batmap(vhd_journal_t *j, vhd_batmap_t *batmap)
-{
- int err;
-
- err = vhd_journal_read_batmap_header(j, batmap);
- if (err)
- return err;
-
- err = vhd_journal_read_batmap_map(j, batmap);
- if (err)
- return err;
-
- err = vhd_validate_batmap(batmap);
- if (err) {
- free(batmap->map);
- batmap->map = NULL;
- return err;
- }
-
- return 0;
-}
-
-static int
-vhd_journal_restore_footer(vhd_journal_t *j, vhd_footer_t *footer)
-{
- return vhd_write_footer_at(&j->vhd, footer,
- j->header.vhd_footer_offset);
-}
-
-static int
-vhd_journal_restore_footer_copy(vhd_journal_t *j, vhd_footer_t *footer)
-{
- return vhd_write_footer_at(&j->vhd, footer, 0);
-}
-
-static int
-vhd_journal_restore_header(vhd_journal_t *j, vhd_header_t *header)
-{
- off_t off;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
- off = vhd->footer.data_offset;
-
- return vhd_write_header_at(&j->vhd, header, off);
-}
-
-static int
-vhd_journal_restore_locators(vhd_journal_t *j, char **locators, int locs)
-{
- size_t size;
- vhd_context_t *vhd;
- int i, n, lidx, err;
- vhd_parent_locator_t *loc;
-
- lidx = 0;
- vhd = &j->vhd;
-
- n = sizeof(vhd->header.loc) / sizeof(vhd_parent_locator_t);
-
- for (i = 0; i < n && lidx < locs; i++) {
- loc = vhd->header.loc + i;
- if (loc->code == PLAT_CODE_NONE)
- continue;
-
- err = vhd_seek(vhd, loc->data_offset, SEEK_SET);
- if (err)
- return err;
-
- size = vhd_parent_locator_size(loc);
- err = vhd_write(vhd, locators[lidx++], size);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-static int
-vhd_journal_restore_bat(vhd_journal_t *j, vhd_bat_t *bat)
-{
- return vhd_write_bat(&j->vhd, bat);
-}
-
-static int
-vhd_journal_restore_batmap(vhd_journal_t *j, vhd_batmap_t *batmap)
-{
- return vhd_write_batmap(&j->vhd, batmap);
-}
-
-static int
-vhd_journal_restore_metadata(vhd_journal_t *j)
-{
- off_t off;
- char **locators;
- vhd_footer_t copy;
- vhd_context_t *vhd;
- int i, locs, hlocs, err;
-
- vhd = &j->vhd;
- locs = 0;
- hlocs = 0;
- locators = NULL;
-
- err = vhd_journal_seek(j, sizeof(vhd_journal_header_t), SEEK_SET);
- if (err)
- return err;
-
- err = vhd_journal_read_footer(j, &vhd->footer);
- if (err)
- return err;
-
- if (!vhd_type_dynamic(vhd))
- goto restore;
-
- err = vhd_journal_read_footer_copy(j, ©);
- if (err)
- return err;
-
- err = vhd_journal_read_header(j, &vhd->header);
- if (err)
- return err;
-
- for (hlocs = 0, i = 0; i < vhd_parent_locator_count(vhd); i++) {
- if (vhd_validate_platform_code(vhd->header.loc[i].code))
- return err;
-
- if (vhd->header.loc[i].code != PLAT_CODE_NONE)
- hlocs++;
- }
-
- if (hlocs) {
- err = vhd_journal_read_locators(j, &locators, &locs);
- if (err)
- return err;
-
- if (hlocs != locs) {
- err = -EINVAL;
- goto out;
- }
- }
-
- err = vhd_journal_read_bat(j, &vhd->bat);
- if (err)
- goto out;
-
- if (vhd_has_batmap(vhd)) {
- err = vhd_journal_read_batmap(j, &vhd->batmap);
- if (err)
- goto out;
- }
-
-restore:
- off = vhd_journal_position(j);
- if (off == (off_t)-1)
- return -errno;
-
- if (j->header.journal_data_offset != off)
- return -EINVAL;
-
- err = vhd_journal_restore_footer(j, &vhd->footer);
- if (err)
- goto out;
-
- if (!vhd_type_dynamic(vhd))
- goto out;
-
- err = vhd_journal_restore_footer_copy(j, ©);
- if (err)
- goto out;
-
- err = vhd_journal_restore_header(j, &vhd->header);
- if (err)
- goto out;
-
- if (locs) {
- err = vhd_journal_restore_locators(j, locators, locs);
- if (err)
- goto out;
- }
-
- err = vhd_journal_restore_bat(j, &vhd->bat);
- if (err)
- goto out;
-
- if (vhd_has_batmap(vhd)) {
- err = vhd_journal_restore_batmap(j, &vhd->batmap);
- if (err)
- goto out;
- }
-
- err = 0;
-
-out:
- if (locators) {
- for (i = 0; i < locs; i++)
- free(locators[i]);
- free(locators);
- }
-
- if (!err && !vhd->is_block)
- err = ftruncate(vhd->fd,
- j->header.vhd_footer_offset +
- sizeof(vhd_footer_t));
-
- return err;
-}
-
-static int
-vhd_journal_disable_vhd(vhd_journal_t *j)
-{
- int err;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
-
- err = vhd_get_footer(vhd);
- if (err)
- return err;
-
- memcpy(&vhd->footer.cookie,
- VHD_POISON_COOKIE, sizeof(vhd->footer.cookie));
- vhd->footer.checksum = vhd_checksum_footer(&vhd->footer);
-
- err = vhd_write_footer(vhd, &vhd->footer);
- if (err)
- return err;
-
- return 0;
-}
-
-static int
-vhd_journal_enable_vhd(vhd_journal_t *j)
-{
- int err;
- vhd_context_t *vhd;
-
- vhd = &j->vhd;
-
- err = vhd_get_footer(vhd);
- if (err)
- return err;
-
- if (!vhd_disabled(vhd))
- return 0;
-
- memcpy(&vhd->footer.cookie, HD_COOKIE, sizeof(vhd->footer.cookie));
- vhd->footer.checksum = vhd_checksum_footer(&vhd->footer);
-
- err = vhd_write_footer(vhd, &vhd->footer);
- if (err)
- return err;
-
- return 0;
-}
-
-int
-vhd_journal_close(vhd_journal_t *j)
-{
- if (j->jfd)
- close(j->jfd);
-
- vhd_close(&j->vhd);
- free(j->jname);
-
- return 0;
-}
-
-int
-vhd_journal_remove(vhd_journal_t *j)
-{
- int err;
-
- err = vhd_journal_enable_vhd(j);
- if (err)
- return err;
-
- if (j->jfd) {
- close(j->jfd);
- if (!j->is_block)
- unlink(j->jname);
- }
-
- vhd_close(&j->vhd);
- free(j->jname);
-
- return 0;
-}
-
-int
-vhd_journal_open(vhd_journal_t *j, const char *file, const char *jfile)
-{
- int err;
- vhd_context_t *vhd;
-
- memset(j, 0, sizeof(vhd_journal_t));
-
- j->jfd = -1;
- vhd = &j->vhd;
-
- j->jname = strdup(jfile);
- if (j->jname == NULL)
- return -ENOMEM;
-
- j->jfd = open(j->jname, O_LARGEFILE | O_RDWR);
- if (j->jfd == -1) {
- err = -errno;
- goto fail;
- }
-
- err = vhd_test_file_fixed(j->jname, &j->is_block);
- if (err)
- goto fail;
-
- vhd->fd = open(file, O_LARGEFILE | O_RDWR | O_DIRECT);
- if (vhd->fd == -1) {
- err = -errno;
- goto fail;
- }
-
- err = vhd_test_file_fixed(file, &vhd->is_block);
- if (err)
- goto fail;
-
- err = vhd_journal_read_journal_header(j, &j->header);
- if (err)
- goto fail;
-
- err = vhd_journal_restore_metadata(j);
- if (err)
- goto fail;
-
- close(vhd->fd);
- free(vhd->bat.bat);
- free(vhd->batmap.map);
-
- err = vhd_open(vhd, file, VHD_OPEN_RDWR);
- if (err)
- goto fail;
-
- err = vhd_get_bat(vhd);
- if (err)
- goto fail;
-
- if (vhd_has_batmap(vhd)) {
- err = vhd_get_batmap(vhd);
- if (err)
- goto fail;
- }
-
- err = vhd_journal_disable_vhd(j);
- if (err)
- goto fail;
-
- return 0;
-
-fail:
- vhd_journal_close(j);
- return err;
-}
-
-int
-vhd_journal_create(vhd_journal_t *j, const char *file, const char *jfile)
-{
- char *buf;
- int i, err;
- size_t size;
- off_t off;
- struct stat stats;
-
- memset(j, 0, sizeof(vhd_journal_t));
- j->jfd = -1;
-
- j->jname = strdup(jfile);
- if (j->jname == NULL) {
- err = -ENOMEM;
- goto fail1;
- }
-
- if (access(j->jname, F_OK) == 0) {
- err = vhd_test_file_fixed(j->jname, &j->is_block);
- if (err)
- goto fail1;
-
- if (!j->is_block) {
- err = -EEXIST;
- goto fail1;
- }
- }
-
- if (j->is_block)
- j->jfd = open(j->jname, O_LARGEFILE | O_RDWR, 0644);
- else
- j->jfd = open(j->jname,
- O_CREAT | O_TRUNC | O_LARGEFILE | O_RDWR, 0644);
- if (j->jfd == -1) {
- err = -errno;
- goto fail1;
- }
-
- err = vhd_open(&j->vhd, file, VHD_OPEN_RDWR | VHD_OPEN_STRICT);
- if (err)
- goto fail1;
-
- err = vhd_get_bat(&j->vhd);
- if (err)
- goto fail2;
-
- if (vhd_has_batmap(&j->vhd)) {
- err = vhd_get_batmap(&j->vhd);
- if (err)
- goto fail2;
- }
-
- err = vhd_journal_add_journal_header(j);
- if (err)
- goto fail2;
-
- err = vhd_journal_add_metadata(j);
- if (err)
- goto fail2;
-
- err = vhd_journal_disable_vhd(j);
- if (err)
- goto fail2;
-
- err = vhd_journal_sync(j);
- if (err)
- goto fail2;
-
- return 0;
-
-fail1:
- if (j->jfd != -1) {
- close(j->jfd);
- if (!j->is_block)
- unlink(j->jname);
- }
- free(j->jname);
- memset(j, 0, sizeof(vhd_journal_t));
-
- return err;
-
-fail2:
- vhd_journal_remove(j);
- return err;
-}
-
-int
-vhd_journal_add_block(vhd_journal_t *j, uint32_t block, char mode)
-{
- int err;
- char *buf;
- off_t off;
- size_t size;
- uint64_t blk;
- vhd_context_t *vhd;
-
- buf = NULL;
- vhd = &j->vhd;
-
- if (!vhd_type_dynamic(vhd))
- return -EINVAL;
-
- err = vhd_get_bat(vhd);
- if (err)
- return err;
-
- if (block >= vhd->bat.entries)
- return -ERANGE;
-
- blk = vhd->bat.bat[block];
- if (blk == DD_BLK_UNUSED)
- return 0;
-
- off = vhd_sectors_to_bytes(blk);
-
- if (mode & VHD_JOURNAL_METADATA) {
- size = vhd_sectors_to_bytes(vhd->bm_secs);
-
- err = vhd_read_bitmap(vhd, block, &buf);
- if (err)
- return err;
-
- err = vhd_journal_update(j, off, buf, size,
- VHD_JOURNAL_ENTRY_TYPE_DATA);
-
- free(buf);
-
- if (err)
- return err;
- }
-
- if (mode & VHD_JOURNAL_DATA) {
- off += vhd_sectors_to_bytes(vhd->bm_secs);
- size = vhd_sectors_to_bytes(vhd->spb);
-
- err = vhd_read_block(vhd, block, &buf);
- if (err)
- return err;
-
- err = vhd_journal_update(j, off, buf, size,
- VHD_JOURNAL_ENTRY_TYPE_DATA);
- free(buf);
-
- if (err)
- return err;
- }
-
- return vhd_journal_sync(j);
-}
-
-/*
- * commit indicates the transaction completed
- * successfully and we can remove the undo log
- */
-int
-vhd_journal_commit(vhd_journal_t *j)
-{
- int err;
-
- j->header.journal_data_entries = 0;
- j->header.journal_metadata_entries = 0;
- j->header.journal_data_offset = 0;
- j->header.journal_metadata_offset = 0;
-
- err = vhd_journal_write_header(j, &j->header);
- if (err)
- return err;
-
- if (!j->is_block)
- err = vhd_journal_truncate(j, sizeof(vhd_journal_header_t));
- if (err)
- return -errno;
-
- return 0;
-}
-
-/*
- * revert indicates the transaction failed
- * and we should revert any changes via the undo log
- */
-int
-vhd_journal_revert(vhd_journal_t *j)
-{
- int i, err;
- char *buf, *file;
- vhd_context_t *vhd;
- vhd_journal_entry_t entry;
-
- err = 0;
- vhd = &j->vhd;
- buf = NULL;
-
- file = strdup(vhd->file);
- if (!file)
- return -ENOMEM;
-
- vhd_close(&j->vhd);
- j->vhd.fd = open(file, O_RDWR | O_DIRECT | O_LARGEFILE);
- if (j->vhd.fd == -1) {
- free(file);
- return -errno;
- }
-
- err = vhd_test_file_fixed(file, &vhd->is_block);
- if (err) {
- free(file);
- return err;
- }
-
- err = vhd_journal_restore_metadata(j);
- if (err) {
- free(file);
- return err;
- }
-
- close(vhd->fd);
- free(vhd->bat.bat);
- free(vhd->batmap.map);
-
- err = vhd_open(vhd, file, VHD_OPEN_RDWR);
- free(file);
- if (err)
- return err;
-
- err = vhd_journal_seek(j, j->header.journal_data_offset, SEEK_SET);
- if (err)
- return err;
-
- for (i = 0; i < j->header.journal_data_entries; i++) {
- err = vhd_journal_read_entry(j, &entry);
- if (err)
- goto end;
-
- err = posix_memalign((void **)&buf,
- VHD_SECTOR_SIZE, entry.size);
- if (err) {
- err = -err;
- buf = NULL;
- goto end;
- }
-
- err = vhd_journal_read(j, buf, entry.size);
- if (err)
- goto end;
-
- err = vhd_journal_validate_entry_data(&entry, buf);
- if (err)
- goto end;
-
- err = vhd_seek(vhd, entry.offset, SEEK_SET);
- if (err)
- goto end;
-
- err = vhd_write(vhd, buf, entry.size);
- if (err)
- goto end;
-
- err = 0;
-
- end:
- free(buf);
- buf = NULL;
- if (err)
- break;
- }
-
- if (err)
- return err;
-
- if (!vhd->is_block) {
- err = ftruncate(vhd->fd, j->header.vhd_footer_offset +
- sizeof(vhd_footer_t));
- if (err)
- return -errno;
- }
-
- return vhd_journal_sync(j);
-}