+++ /dev/null
- /*
- Unix SMB/CIFS implementation.
-
- trivial database library
-
- Copyright (C) Andrew Tridgell 1999-2005
- Copyright (C) Paul `Rusty' Russell 2000
- Copyright (C) Jeremy Allison 2000-2003
- Copyright (C) Rusty Russell 2010
-
- ** NOTE! The following LGPL license applies to the ntdb
- ** library. This does NOT imply that all of Samba is released
- ** under the LGPL
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 3 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-#include "private.h"
-#include <ccan/likely/likely.h>
-
-static void free_old_mmaps(struct ntdb_context *ntdb)
-{
- struct ntdb_old_mmap *i;
-
- assert(ntdb->file->direct_count == 0);
-
- while ((i = ntdb->file->old_mmaps) != NULL) {
- ntdb->file->old_mmaps = i->next;
- if (ntdb->flags & NTDB_INTERNAL) {
- ntdb->free_fn(i->map_ptr, ntdb->alloc_data);
- } else {
- munmap(i->map_ptr, i->map_size);
- }
- ntdb->free_fn(i, ntdb->alloc_data);
- }
-}
-
-static enum NTDB_ERROR save_old_map(struct ntdb_context *ntdb)
-{
- struct ntdb_old_mmap *old;
-
- assert(ntdb->file->direct_count);
-
- old = ntdb->alloc_fn(ntdb->file, sizeof(*old), ntdb->alloc_data);
- if (!old) {
- return ntdb_logerr(ntdb, NTDB_ERR_OOM, NTDB_LOG_ERROR,
- "save_old_map alloc failed");
- }
- old->next = ntdb->file->old_mmaps;
- old->map_ptr = ntdb->file->map_ptr;
- old->map_size = ntdb->file->map_size;
- ntdb->file->old_mmaps = old;
-
- return NTDB_SUCCESS;
-}
-
-enum NTDB_ERROR ntdb_munmap(struct ntdb_context *ntdb)
-{
- if (ntdb->file->fd == -1) {
- return NTDB_SUCCESS;
- }
-
- if (!ntdb->file->map_ptr) {
- return NTDB_SUCCESS;
- }
-
- /* We can't unmap now if there are accessors. */
- if (ntdb->file->direct_count) {
- return save_old_map(ntdb);
- } else {
- munmap(ntdb->file->map_ptr, ntdb->file->map_size);
- ntdb->file->map_ptr = NULL;
- }
- return NTDB_SUCCESS;
-}
-
-enum NTDB_ERROR ntdb_mmap(struct ntdb_context *ntdb)
-{
- int mmap_flags;
-
- if (ntdb->flags & NTDB_INTERNAL)
- return NTDB_SUCCESS;
-
-#ifndef HAVE_INCOHERENT_MMAP
- if (ntdb->flags & NTDB_NOMMAP)
- return NTDB_SUCCESS;
-#endif
-
- if ((ntdb->open_flags & O_ACCMODE) == O_RDONLY)
- mmap_flags = PROT_READ;
- else
- mmap_flags = PROT_READ | PROT_WRITE;
-
- /* size_t can be smaller than off_t. */
- if ((size_t)ntdb->file->map_size == ntdb->file->map_size) {
- ntdb->file->map_ptr = mmap(NULL, ntdb->file->map_size,
- mmap_flags,
- MAP_SHARED, ntdb->file->fd, 0);
- } else
- ntdb->file->map_ptr = MAP_FAILED;
-
- /*
- * NB. When mmap fails it returns MAP_FAILED *NOT* NULL !!!!
- */
- if (ntdb->file->map_ptr == MAP_FAILED) {
- ntdb->file->map_ptr = NULL;
-#ifdef HAVE_INCOHERENT_MMAP
- /* Incoherent mmap means everyone must mmap! */
- return ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "ntdb_mmap failed for size %lld (%s)",
- (long long)ntdb->file->map_size,
- strerror(errno));
-#else
- ntdb_logerr(ntdb, NTDB_SUCCESS, NTDB_LOG_WARNING,
- "ntdb_mmap failed for size %lld (%s)",
- (long long)ntdb->file->map_size, strerror(errno));
-#endif
- }
- return NTDB_SUCCESS;
-}
-
-/* check for an out of bounds access - if it is out of bounds then
- see if the database has been expanded by someone else and expand
- if necessary
- note that "len" is the minimum length needed for the db.
-
- If probe is true, len being too large isn't a failure.
-*/
-static enum NTDB_ERROR ntdb_normal_oob(struct ntdb_context *ntdb,
- ntdb_off_t off, ntdb_len_t len,
- bool probe)
-{
- struct stat st;
- enum NTDB_ERROR ecode;
-
- if (len + off < len) {
- if (probe)
- return NTDB_SUCCESS;
-
- return ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "ntdb_oob off %llu len %llu wrap\n",
- (long long)off, (long long)len);
- }
-
- if (ntdb->flags & NTDB_INTERNAL) {
- if (probe)
- return NTDB_SUCCESS;
-
- ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "ntdb_oob len %lld beyond internal"
- " alloc size %lld",
- (long long)(off + len),
- (long long)ntdb->file->map_size);
- return NTDB_ERR_IO;
- }
-
- ecode = ntdb_lock_expand(ntdb, F_RDLCK);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- if (fstat(ntdb->file->fd, &st) != 0) {
- ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "Failed to fstat file: %s", strerror(errno));
- ntdb_unlock_expand(ntdb, F_RDLCK);
- return NTDB_ERR_IO;
- }
-
- ntdb_unlock_expand(ntdb, F_RDLCK);
-
- if (st.st_size < off + len) {
- if (probe)
- return NTDB_SUCCESS;
-
- ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "ntdb_oob len %llu beyond eof at %llu",
- (long long)(off + len), (long long)st.st_size);
- return NTDB_ERR_IO;
- }
-
- /* Unmap, update size, remap */
- ecode = ntdb_munmap(ntdb);
- if (ecode) {
- return ecode;
- }
-
- ntdb->file->map_size = st.st_size;
- return ntdb_mmap(ntdb);
-}
-
-/* Endian conversion: we only ever deal with 8 byte quantities */
-void *ntdb_convert(const struct ntdb_context *ntdb, void *buf, ntdb_len_t size)
-{
- assert(size % 8 == 0);
- if (unlikely((ntdb->flags & NTDB_CONVERT)) && buf) {
- uint64_t i, *p = (uint64_t *)buf;
- for (i = 0; i < size / 8; i++)
- p[i] = bswap_64(p[i]);
- }
- return buf;
-}
-
-/* Return first non-zero offset in offset array, or end, or -ve error. */
-/* FIXME: Return the off? */
-uint64_t ntdb_find_nonzero_off(struct ntdb_context *ntdb,
- ntdb_off_t base, uint64_t start, uint64_t end)
-{
- uint64_t i;
- const uint64_t *val;
-
- /* Zero vs non-zero is the same unconverted: minor optimization. */
- val = ntdb_access_read(ntdb, base + start * sizeof(ntdb_off_t),
- (end - start) * sizeof(ntdb_off_t), false);
- if (NTDB_PTR_IS_ERR(val)) {
- return NTDB_ERR_TO_OFF(NTDB_PTR_ERR(val));
- }
-
- for (i = 0; i < (end - start); i++) {
- if (val[i])
- break;
- }
- ntdb_access_release(ntdb, val);
- return start + i;
-}
-
-/* Return first zero offset in num offset array, or num, or -ve error. */
-uint64_t ntdb_find_zero_off(struct ntdb_context *ntdb, ntdb_off_t off,
- uint64_t num)
-{
- uint64_t i;
- const uint64_t *val;
-
- /* Zero vs non-zero is the same unconverted: minor optimization. */
- val = ntdb_access_read(ntdb, off, num * sizeof(ntdb_off_t), false);
- if (NTDB_PTR_IS_ERR(val)) {
- return NTDB_ERR_TO_OFF(NTDB_PTR_ERR(val));
- }
-
- for (i = 0; i < num; i++) {
- if (!val[i])
- break;
- }
- ntdb_access_release(ntdb, val);
- return i;
-}
-
-enum NTDB_ERROR zero_out(struct ntdb_context *ntdb, ntdb_off_t off, ntdb_len_t len)
-{
- char buf[8192] = { 0 };
- void *p = ntdb->io->direct(ntdb, off, len, true);
- enum NTDB_ERROR ecode = NTDB_SUCCESS;
-
- assert(!(ntdb->flags & NTDB_RDONLY));
- if (NTDB_PTR_IS_ERR(p)) {
- return NTDB_PTR_ERR(p);
- }
- if (p) {
- memset(p, 0, len);
- return ecode;
- }
- while (len) {
- unsigned todo = len < sizeof(buf) ? len : sizeof(buf);
- ecode = ntdb->io->twrite(ntdb, off, buf, todo);
- if (ecode != NTDB_SUCCESS) {
- break;
- }
- len -= todo;
- off += todo;
- }
- return ecode;
-}
-
-/* write a lump of data at a specified offset */
-static enum NTDB_ERROR ntdb_write(struct ntdb_context *ntdb, ntdb_off_t off,
- const void *buf, ntdb_len_t len)
-{
- enum NTDB_ERROR ecode;
-
- if (ntdb->flags & NTDB_RDONLY) {
- return ntdb_logerr(ntdb, NTDB_ERR_RDONLY, NTDB_LOG_USE_ERROR,
- "Write to read-only database");
- }
-
- ecode = ntdb_oob(ntdb, off, len, false);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- if (ntdb->file->map_ptr) {
- memcpy(off + (char *)ntdb->file->map_ptr, buf, len);
- } else {
-#ifdef HAVE_INCOHERENT_MMAP
- return NTDB_ERR_IO;
-#else
- ssize_t ret;
- ret = pwrite(ntdb->file->fd, buf, len, off);
- if (ret != len) {
- /* This shouldn't happen: we avoid sparse files. */
- if (ret >= 0)
- errno = ENOSPC;
-
- return ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "ntdb_write: %zi at %zu len=%zu (%s)",
- ret, (size_t)off, (size_t)len,
- strerror(errno));
- }
-#endif
- }
- return NTDB_SUCCESS;
-}
-
-/* read a lump of data at a specified offset */
-static enum NTDB_ERROR ntdb_read(struct ntdb_context *ntdb, ntdb_off_t off,
- void *buf, ntdb_len_t len)
-{
- enum NTDB_ERROR ecode;
-
- ecode = ntdb_oob(ntdb, off, len, false);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- if (ntdb->file->map_ptr) {
- memcpy(buf, off + (char *)ntdb->file->map_ptr, len);
- } else {
-#ifdef HAVE_INCOHERENT_MMAP
- return NTDB_ERR_IO;
-#else
- ssize_t r = pread(ntdb->file->fd, buf, len, off);
- if (r != len) {
- return ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "ntdb_read failed with %zi at %zu "
- "len=%zu (%s) map_size=%zu",
- r, (size_t)off, (size_t)len,
- strerror(errno),
- (size_t)ntdb->file->map_size);
- }
-#endif
- }
- return NTDB_SUCCESS;
-}
-
-enum NTDB_ERROR ntdb_write_convert(struct ntdb_context *ntdb, ntdb_off_t off,
- const void *rec, size_t len)
-{
- enum NTDB_ERROR ecode;
-
- if (unlikely((ntdb->flags & NTDB_CONVERT))) {
- void *conv = ntdb->alloc_fn(ntdb, len, ntdb->alloc_data);
- if (!conv) {
- return ntdb_logerr(ntdb, NTDB_ERR_OOM, NTDB_LOG_ERROR,
- "ntdb_write: no memory converting"
- " %zu bytes", len);
- }
- memcpy(conv, rec, len);
- ecode = ntdb->io->twrite(ntdb, off,
- ntdb_convert(ntdb, conv, len), len);
- ntdb->free_fn(conv, ntdb->alloc_data);
- } else {
- ecode = ntdb->io->twrite(ntdb, off, rec, len);
- }
- return ecode;
-}
-
-enum NTDB_ERROR ntdb_read_convert(struct ntdb_context *ntdb, ntdb_off_t off,
- void *rec, size_t len)
-{
- enum NTDB_ERROR ecode = ntdb->io->tread(ntdb, off, rec, len);
- ntdb_convert(ntdb, rec, len);
- return ecode;
-}
-
-static void *_ntdb_alloc_read(struct ntdb_context *ntdb, ntdb_off_t offset,
- ntdb_len_t len, unsigned int prefix)
-{
- unsigned char *buf;
- enum NTDB_ERROR ecode;
-
- /* some systems don't like zero length malloc */
- buf = ntdb->alloc_fn(ntdb, prefix + len ? prefix + len : 1,
- ntdb->alloc_data);
- if (!buf) {
- ntdb_logerr(ntdb, NTDB_ERR_OOM, NTDB_LOG_ERROR,
- "ntdb_alloc_read alloc failed len=%zu",
- (size_t)(prefix + len));
- return NTDB_ERR_PTR(NTDB_ERR_OOM);
- } else {
- ecode = ntdb->io->tread(ntdb, offset, buf+prefix, len);
- if (unlikely(ecode != NTDB_SUCCESS)) {
- ntdb->free_fn(buf, ntdb->alloc_data);
- return NTDB_ERR_PTR(ecode);
- }
- }
- return buf;
-}
-
-/* read a lump of data, allocating the space for it */
-void *ntdb_alloc_read(struct ntdb_context *ntdb, ntdb_off_t offset, ntdb_len_t len)
-{
- return _ntdb_alloc_read(ntdb, offset, len, 0);
-}
-
-static enum NTDB_ERROR fill(struct ntdb_context *ntdb,
- const void *buf, size_t size,
- ntdb_off_t off, ntdb_len_t len)
-{
- while (len) {
- size_t n = len > size ? size : len;
- ssize_t ret = pwrite(ntdb->file->fd, buf, n, off);
- if (ret != n) {
- if (ret >= 0)
- errno = ENOSPC;
-
- return ntdb_logerr(ntdb, NTDB_ERR_IO, NTDB_LOG_ERROR,
- "fill failed:"
- " %zi at %zu len=%zu (%s)",
- ret, (size_t)off, (size_t)len,
- strerror(errno));
- }
- len -= n;
- off += n;
- }
- return NTDB_SUCCESS;
-}
-
-/* expand a file. we prefer to use ftruncate, as that is what posix
- says to use for mmap expansion */
-static enum NTDB_ERROR ntdb_expand_file(struct ntdb_context *ntdb,
- ntdb_len_t addition)
-{
- char buf[8192];
- enum NTDB_ERROR ecode;
-
- assert((ntdb->file->map_size + addition) % NTDB_PGSIZE == 0);
- if (ntdb->flags & NTDB_RDONLY) {
- return ntdb_logerr(ntdb, NTDB_ERR_RDONLY, NTDB_LOG_USE_ERROR,
- "Expand on read-only database");
- }
-
- if (ntdb->flags & NTDB_INTERNAL) {
- char *new;
-
- /* Can't free it if we have direct accesses. */
- if (ntdb->file->direct_count) {
- ecode = save_old_map(ntdb);
- if (ecode) {
- return ecode;
- }
- new = ntdb->alloc_fn(ntdb->file,
- ntdb->file->map_size + addition,
- ntdb->alloc_data);
- if (new) {
- memcpy(new, ntdb->file->map_ptr,
- ntdb->file->map_size);
- }
- } else {
- new = ntdb->expand_fn(ntdb->file->map_ptr,
- ntdb->file->map_size + addition,
- ntdb->alloc_data);
- }
- if (!new) {
- return ntdb_logerr(ntdb, NTDB_ERR_OOM, NTDB_LOG_ERROR,
- "No memory to expand database");
- }
- ntdb->file->map_ptr = new;
- ntdb->file->map_size += addition;
- return NTDB_SUCCESS;
- } else {
- /* Unmap before trying to write; old NTDB claimed OpenBSD had
- * problem with this otherwise. */
- ecode = ntdb_munmap(ntdb);
- if (ecode) {
- return ecode;
- }
-
- /* If this fails, we try to fill anyway. */
- if (ftruncate(ntdb->file->fd, ntdb->file->map_size + addition))
- ;
-
- /* now fill the file with something. This ensures that the
- file isn't sparse, which would be very bad if we ran out of
- disk. This must be done with write, not via mmap */
- memset(buf, 0x43, sizeof(buf));
- ecode = fill(ntdb, buf, sizeof(buf), ntdb->file->map_size,
- addition);
- if (ecode != NTDB_SUCCESS)
- return ecode;
- ntdb->file->map_size += addition;
- return ntdb_mmap(ntdb);
- }
-}
-
-const void *ntdb_access_read(struct ntdb_context *ntdb,
- ntdb_off_t off, ntdb_len_t len, bool convert)
-{
- void *ret = NULL;
-
- if (likely(!(ntdb->flags & NTDB_CONVERT))) {
- ret = ntdb->io->direct(ntdb, off, len, false);
-
- if (NTDB_PTR_IS_ERR(ret)) {
- return ret;
- }
- }
- if (!ret) {
- struct ntdb_access_hdr *hdr;
- hdr = _ntdb_alloc_read(ntdb, off, len, sizeof(*hdr));
- if (NTDB_PTR_IS_ERR(hdr)) {
- return hdr;
- }
- hdr->next = ntdb->access;
- ntdb->access = hdr;
- ret = hdr + 1;
- if (convert) {
- ntdb_convert(ntdb, (void *)ret, len);
- }
- } else {
- ntdb->file->direct_count++;
- }
-
- return ret;
-}
-
-void *ntdb_access_write(struct ntdb_context *ntdb,
- ntdb_off_t off, ntdb_len_t len, bool convert)
-{
- void *ret = NULL;
-
- if (ntdb->flags & NTDB_RDONLY) {
- ntdb_logerr(ntdb, NTDB_ERR_RDONLY, NTDB_LOG_USE_ERROR,
- "Write to read-only database");
- return NTDB_ERR_PTR(NTDB_ERR_RDONLY);
- }
-
- if (likely(!(ntdb->flags & NTDB_CONVERT))) {
- ret = ntdb->io->direct(ntdb, off, len, true);
-
- if (NTDB_PTR_IS_ERR(ret)) {
- return ret;
- }
- }
-
- if (!ret) {
- struct ntdb_access_hdr *hdr;
- hdr = _ntdb_alloc_read(ntdb, off, len, sizeof(*hdr));
- if (NTDB_PTR_IS_ERR(hdr)) {
- return hdr;
- }
- hdr->next = ntdb->access;
- ntdb->access = hdr;
- hdr->off = off;
- hdr->len = len;
- hdr->convert = convert;
- ret = hdr + 1;
- if (convert)
- ntdb_convert(ntdb, (void *)ret, len);
- } else {
- ntdb->file->direct_count++;
- }
- return ret;
-}
-
-static struct ntdb_access_hdr **find_hdr(struct ntdb_context *ntdb, const void *p)
-{
- struct ntdb_access_hdr **hp;
-
- for (hp = &ntdb->access; *hp; hp = &(*hp)->next) {
- if (*hp + 1 == p)
- return hp;
- }
- return NULL;
-}
-
-void ntdb_access_release(struct ntdb_context *ntdb, const void *p)
-{
- struct ntdb_access_hdr *hdr, **hp = find_hdr(ntdb, p);
-
- if (hp) {
- hdr = *hp;
- *hp = hdr->next;
- ntdb->free_fn(hdr, ntdb->alloc_data);
- } else {
- if (--ntdb->file->direct_count == 0) {
- free_old_mmaps(ntdb);
- }
- }
-}
-
-enum NTDB_ERROR ntdb_access_commit(struct ntdb_context *ntdb, void *p)
-{
- struct ntdb_access_hdr *hdr, **hp = find_hdr(ntdb, p);
- enum NTDB_ERROR ecode;
-
- if (hp) {
- hdr = *hp;
- if (hdr->convert)
- ecode = ntdb_write_convert(ntdb, hdr->off, p, hdr->len);
- else
- ecode = ntdb_write(ntdb, hdr->off, p, hdr->len);
- *hp = hdr->next;
- ntdb->free_fn(hdr, ntdb->alloc_data);
- } else {
- if (--ntdb->file->direct_count == 0) {
- free_old_mmaps(ntdb);
- }
- ecode = NTDB_SUCCESS;
- }
-
- return ecode;
-}
-
-static void *ntdb_direct(struct ntdb_context *ntdb, ntdb_off_t off, size_t len,
- bool write_mode)
-{
- enum NTDB_ERROR ecode;
-
- if (unlikely(!ntdb->file->map_ptr))
- return NULL;
-
- ecode = ntdb_oob(ntdb, off, len, false);
- if (unlikely(ecode != NTDB_SUCCESS))
- return NTDB_ERR_PTR(ecode);
- return (char *)ntdb->file->map_ptr + off;
-}
-
-static ntdb_off_t ntdb_read_normal_off(struct ntdb_context *ntdb,
- ntdb_off_t off)
-{
- ntdb_off_t ret;
- enum NTDB_ERROR ecode;
- ntdb_off_t *p;
-
- p = ntdb_direct(ntdb, off, sizeof(*p), false);
- if (NTDB_PTR_IS_ERR(p)) {
- return NTDB_ERR_TO_OFF(NTDB_PTR_ERR(p));
- }
- if (likely(p)) {
- return *p;
- }
-
- ecode = ntdb_read(ntdb, off, &ret, sizeof(ret));
- if (ecode != NTDB_SUCCESS) {
- return NTDB_ERR_TO_OFF(ecode);
- }
- return ret;
-}
-
-static ntdb_off_t ntdb_read_convert_off(struct ntdb_context *ntdb,
- ntdb_off_t off)
-{
- ntdb_off_t ret;
- enum NTDB_ERROR ecode;
-
- ecode = ntdb_read_convert(ntdb, off, &ret, sizeof(ret));
- if (ecode != NTDB_SUCCESS) {
- return NTDB_ERR_TO_OFF(ecode);
- }
- return ret;
-}
-
-static enum NTDB_ERROR ntdb_write_normal_off(struct ntdb_context *ntdb,
- ntdb_off_t off, ntdb_off_t val)
-{
- ntdb_off_t *p;
-
- p = ntdb_direct(ntdb, off, sizeof(*p), true);
- if (NTDB_PTR_IS_ERR(p)) {
- return NTDB_PTR_ERR(p);
- }
- if (likely(p)) {
- *p = val;
- return NTDB_SUCCESS;
- }
- return ntdb_write(ntdb, off, &val, sizeof(val));
-}
-
-static enum NTDB_ERROR ntdb_write_convert_off(struct ntdb_context *ntdb,
- ntdb_off_t off, ntdb_off_t val)
-{
- return ntdb_write_convert(ntdb, off, &val, sizeof(val));
-}
-
-void ntdb_inc_seqnum(struct ntdb_context *ntdb)
-{
- ntdb_off_t seq;
-
- if (likely(!(ntdb->flags & NTDB_CONVERT))) {
- int64_t *direct;
-
- direct = ntdb->io->direct(ntdb,
- offsetof(struct ntdb_header, seqnum),
- sizeof(*direct), true);
- if (likely(direct)) {
- /* Don't let it go negative, even briefly */
- if (unlikely((*direct) + 1) < 0)
- *direct = 0;
- (*direct)++;
- return;
- }
- }
-
- seq = ntdb_read_off(ntdb, offsetof(struct ntdb_header, seqnum));
- if (!NTDB_OFF_IS_ERR(seq)) {
- seq++;
- if (unlikely((int64_t)seq < 0))
- seq = 0;
- ntdb_write_off(ntdb, offsetof(struct ntdb_header, seqnum), seq);
- }
-}
-
-static const struct ntdb_methods io_methods = {
- ntdb_read,
- ntdb_write,
- ntdb_normal_oob,
- ntdb_expand_file,
- ntdb_direct,
- ntdb_read_normal_off,
- ntdb_write_normal_off,
-};
-
-static const struct ntdb_methods io_convert_methods = {
- ntdb_read,
- ntdb_write,
- ntdb_normal_oob,
- ntdb_expand_file,
- ntdb_direct,
- ntdb_read_convert_off,
- ntdb_write_convert_off,
-};
-
-/*
- initialise the default methods table
-*/
-void ntdb_io_init(struct ntdb_context *ntdb)
-{
- if (ntdb->flags & NTDB_CONVERT)
- ntdb->io = &io_convert_methods;
- else
- ntdb->io = &io_methods;
-}
git.samba.org / kai / samba-autobuild / .git / blobdiff