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Diffstat (limited to 'lib/tdb2/open.c')
-rw-r--r--lib/tdb2/open.c133
1 files changed, 107 insertions, 26 deletions
diff --git a/lib/tdb2/open.c b/lib/tdb2/open.c
index bad365756b..0a4ca5d17e 100644
--- a/lib/tdb2/open.c
+++ b/lib/tdb2/open.c
@@ -16,6 +16,7 @@
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "private.h"
+#include <ccan/build_assert/build_assert.h>
#include <assert.h>
/* all tdbs, to detect double-opens (fcntl file don't nest!) */
@@ -95,6 +96,15 @@ static uint64_t random_number(struct tdb_context *tdb)
return ret;
}
+static void tdb2_context_init(struct tdb_context *tdb)
+{
+ /* Initialize the TDB2 fields here */
+ tdb_io_init(tdb);
+ tdb->tdb2.direct_access = 0;
+ tdb->tdb2.transaction = NULL;
+ tdb->tdb2.access = NULL;
+}
+
struct new_database {
struct tdb_header hdr;
struct tdb_freetable ftable;
@@ -195,6 +205,7 @@ static enum TDB_ERROR tdb_new_file(struct tdb_context *tdb)
tdb->file->lockrecs = NULL;
tdb->file->allrecord_lock.count = 0;
tdb->file->refcnt = 1;
+ tdb->file->map_ptr = NULL;
return TDB_SUCCESS;
}
@@ -347,6 +358,23 @@ void tdb_unset_attribute(struct tdb_context *tdb,
}
}
+static bool is_tdb1(struct tdb1_header *hdr, const void *buf, ssize_t rlen)
+{
+ /* This code assumes we've tried to read entire tdb1 header. */
+ BUILD_ASSERT(sizeof(*hdr) <= sizeof(struct tdb_header));
+
+ if (rlen < (ssize_t)sizeof(*hdr)) {
+ return false;
+ }
+
+ memcpy(hdr, buf, sizeof(*hdr));
+ if (strcmp(hdr->magic_food, TDB_MAGIC_FOOD) != 0)
+ return false;
+
+ return hdr->version == TDB1_VERSION
+ || hdr->version == TDB1_BYTEREV(TDB1_VERSION);
+}
+
struct tdb_context *tdb_open(const char *name, int tdb_flags,
int open_flags, mode_t mode,
union tdb_attribute *attr)
@@ -388,10 +416,6 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
memset(&tdb->stats, 0, sizeof(tdb->stats));
tdb->stats.base.attr = TDB_ATTRIBUTE_STATS;
tdb->stats.size = sizeof(tdb->stats);
- tdb_io_init(tdb);
- tdb->tdb2.direct_access = 0;
- tdb->tdb2.transaction = NULL;
- tdb->tdb2.access = NULL;
while (attr) {
switch (attr->base.attr) {
@@ -420,7 +444,7 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
if (tdb_flags & ~(TDB_INTERNAL | TDB_NOLOCK | TDB_NOMMAP | TDB_CONVERT
| TDB_NOSYNC | TDB_SEQNUM | TDB_ALLOW_NESTING
- | TDB_RDONLY)) {
+ | TDB_RDONLY | TDB_VERSION1)) {
ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
"tdb_open: unknown flags %u", tdb_flags);
goto fail;
@@ -486,13 +510,21 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
goto fail;
}
tdb->file->fd = -1;
- ecode = tdb_new_database(tdb, seed, &hdr);
+ if (tdb->flags & TDB_VERSION1)
+ ecode = tdb1_new_database(tdb, hsize_attr);
+ else {
+ ecode = tdb_new_database(tdb, seed, &hdr);
+ if (ecode == TDB_SUCCESS) {
+ tdb_convert(tdb, &hdr.hash_seed,
+ sizeof(hdr.hash_seed));
+ tdb->hash_seed = hdr.hash_seed;
+ tdb2_context_init(tdb);
+ tdb_ftable_init(tdb);
+ }
+ }
if (ecode != TDB_SUCCESS) {
goto fail;
}
- tdb_convert(tdb, &hdr.hash_seed, sizeof(hdr.hash_seed));
- tdb->hash_seed = hdr.hash_seed;
- tdb_ftable_init(tdb);
return tdb;
}
@@ -534,7 +566,7 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
tdb->file->device = st.st_dev;
tdb->file->inode = st.st_ino;
tdb->file->map_ptr = NULL;
- tdb->file->map_size = sizeof(struct tdb_header);
+ tdb->file->map_size = 0;
}
/* ensure there is only one process initialising at once */
@@ -558,6 +590,12 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
/* If they used O_TRUNC, read will return 0. */
rlen = pread(tdb->file->fd, &hdr, sizeof(hdr), 0);
if (rlen == 0 && (open_flags & O_CREAT)) {
+ if (tdb->flags & TDB_VERSION1) {
+ ecode = tdb1_new_database(tdb, hsize_attr);
+ if (ecode != TDB_SUCCESS)
+ goto fail;
+ goto finished;
+ }
ecode = tdb_new_database(tdb, seed, &hdr);
if (ecode != TDB_SUCCESS) {
goto fail;
@@ -569,6 +607,12 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
goto fail;
} else if (rlen < sizeof(hdr)
|| strcmp(hdr.magic_food, TDB_MAGIC_FOOD) != 0) {
+ if (is_tdb1(&tdb->tdb1.header, &hdr, rlen)) {
+ ecode = tdb1_open(tdb);
+ if (!ecode)
+ goto finished;
+ goto fail;
+ }
ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
"tdb_open: %s is not a tdb file", name);
goto fail;
@@ -578,6 +622,12 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
if (hdr.version == bswap_64(TDB_VERSION))
tdb->flags |= TDB_CONVERT;
else {
+ if (is_tdb1(&tdb->tdb1.header, &hdr, rlen)) {
+ ecode = tdb1_open(tdb);
+ if (!ecode)
+ goto finished;
+ goto fail;
+ }
/* wrong version */
ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
"tdb_open:"
@@ -593,6 +643,16 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
goto fail;
}
+ if (tdb->flags & TDB_VERSION1) {
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open:"
+ " %s does not need TDB_VERSION1",
+ name);
+ goto fail;
+ }
+
+ tdb2_context_init(tdb);
+
tdb_convert(tdb, &hdr, sizeof(hdr));
tdb->hash_seed = hdr.hash_seed;
hash_test = TDB_HASH_MAGIC;
@@ -617,31 +677,46 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
goto fail;
}
+finished:
+ if (tdb->flags & TDB_VERSION1) {
+ /* if needed, run recovery */
+ if (tdb1_transaction_recover(tdb) == -1) {
+ ecode = tdb->last_error;
+ goto fail;
+ }
+ }
+
tdb_unlock_open(tdb, openlock);
- /* This make sure we have current map_size and mmap. */
- ecode = tdb->tdb2.io->oob(tdb, tdb->file->map_size + 1, true);
+ /* This makes sure we have current map_size and mmap. */
+ if (tdb->flags & TDB_VERSION1) {
+ ecode = tdb1_probe_length(tdb);
+ } else {
+ ecode = tdb->tdb2.io->oob(tdb, tdb->file->map_size + 1, true);
+ }
if (unlikely(ecode != TDB_SUCCESS))
goto fail;
- /* Now it's fully formed, recover if necessary. */
- berr = tdb_needs_recovery(tdb);
- if (unlikely(berr != false)) {
- if (berr < 0) {
- ecode = berr;
- goto fail;
+ if (!(tdb->flags & TDB_VERSION1)) {
+ /* Now it's fully formed, recover if necessary. */
+ berr = tdb_needs_recovery(tdb);
+ if (unlikely(berr != false)) {
+ if (berr < 0) {
+ ecode = berr;
+ goto fail;
+ }
+ ecode = tdb_lock_and_recover(tdb);
+ if (ecode != TDB_SUCCESS) {
+ goto fail;
+ }
}
- ecode = tdb_lock_and_recover(tdb);
+
+ ecode = tdb_ftable_init(tdb);
if (ecode != TDB_SUCCESS) {
goto fail;
}
}
- ecode = tdb_ftable_init(tdb);
- if (ecode != TDB_SUCCESS) {
- goto fail;
- }
-
tdb->next = tdbs;
tdbs = tdb;
return tdb;
@@ -702,8 +777,14 @@ int tdb_close(struct tdb_context *tdb)
tdb_trace(tdb, "tdb_close");
- if (tdb->tdb2.transaction) {
- tdb_transaction_cancel(tdb);
+ if (tdb->flags & TDB_VERSION1) {
+ if (tdb->tdb1.transaction) {
+ tdb1_transaction_cancel(tdb);
+ }
+ } else {
+ if (tdb->tdb2.transaction) {
+ tdb_transaction_cancel(tdb);
+ }
}
if (tdb->file->map_ptr) {
generated by cgit (git 2.34.1) at 2024-07-03 03:41:52 +0000