X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Fopen.c;h=3e3b083e59d788906169b3fc0dcaf5ae9d9a3571;hp=277a95f9e8ba7bb72caed6ac434f7ccb798ebc1c;hb=380372e733416c2b348d5307f536d0a0807e95df;hpb=937d0babe99dcd315040a9e48430140e63e4a7df
diff --git a/ccan/tdb2/open.c b/ccan/tdb2/open.c
index 277a95f9..3e3b083e 100644
--- a/ccan/tdb2/open.c
+++ b/ccan/tdb2/open.c
@@ -16,23 +16,23 @@
License along with this library; if not, see .
*/
#include "private.h"
-#include
+#include
#include
-/* all lock info, to detect double-opens (fcntl file don't nest!) */
-static struct tdb_file *files = NULL;
+/* all tdbs, to detect double-opens (fcntl file don't nest!) */
+static struct tdb_context *tdbs = NULL;
static struct tdb_file *find_file(dev_t device, ino_t ino)
{
- struct tdb_file *i;
+ struct tdb_context *i;
- for (i = files; i; i = i->next) {
- if (i->device == device && i->inode == ino) {
- i->refcnt++;
- break;
+ for (i = tdbs; i; i = i->next) {
+ if (i->file->device == device && i->file->inode == ino) {
+ i->file->refcnt++;
+ return i->file;
}
}
- return i;
+ return NULL;
}
static bool read_all(int fd, void *buf, size_t len)
@@ -96,6 +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;
@@ -196,6 +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;
}
@@ -210,6 +220,7 @@ enum TDB_ERROR tdb_set_attribute(struct tdb_context *tdb,
case TDB_ATTRIBUTE_HASH:
case TDB_ATTRIBUTE_SEED:
case TDB_ATTRIBUTE_OPENHOOK:
+ case TDB_ATTRIBUTE_TDB1_HASHSIZE:
return tdb->last_error
= tdb_logerr(tdb, TDB_ERR_EINVAL,
TDB_LOG_USE_ERROR,
@@ -219,7 +230,9 @@ enum TDB_ERROR tdb_set_attribute(struct tdb_context *tdb,
? "TDB_ATTRIBUTE_HASH"
: attr->base.attr == TDB_ATTRIBUTE_SEED
? "TDB_ATTRIBUTE_SEED"
- : "TDB_ATTRIBUTE_OPENHOOK");
+ : attr->base.attr == TDB_ATTRIBUTE_OPENHOOK
+ ? "TDB_ATTRIBUTE_OPENHOOK"
+ : "TDB_ATTRIBUTE_TDB1_HASHSIZE");
case TDB_ATTRIBUTE_STATS:
return tdb->last_error
= tdb_logerr(tdb, TDB_ERR_EINVAL,
@@ -242,16 +255,6 @@ enum TDB_ERROR tdb_set_attribute(struct tdb_context *tdb,
return TDB_SUCCESS;
}
-static uint64_t jenkins_hash(const void *key, size_t length, uint64_t seed,
- void *unused)
-{
- uint64_t ret;
- /* hash64_stable assumes lower bits are more important; they are a
- * slightly better hash. We use the upper bits first, so swap them. */
- ret = hash64_stable((const unsigned char *)key, length, seed);
- return (ret >> 32) | (ret << 32);
-}
-
enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
union tdb_attribute *attr)
{
@@ -267,6 +270,13 @@ enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
attr->hash.data = tdb->hash_data;
break;
case TDB_ATTRIBUTE_SEED:
+ if (tdb->flags & TDB_VERSION1)
+ return tdb->last_error
+ = tdb_logerr(tdb, TDB_ERR_EINVAL,
+ TDB_LOG_USE_ERROR,
+ "tdb_get_attribute:"
+ " cannot get TDB_ATTRIBUTE_SEED"
+ " on TDB1 tdb.");
attr->seed.seed = tdb->hash_seed;
break;
case TDB_ATTRIBUTE_OPENHOOK:
@@ -287,6 +297,16 @@ enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
attr->flock.unlock = tdb->unlock_fn;
attr->flock.data = tdb->lock_data;
break;
+ case TDB_ATTRIBUTE_TDB1_HASHSIZE:
+ if (!(tdb->flags & TDB_VERSION1))
+ return tdb->last_error
+ = tdb_logerr(tdb, TDB_ERR_EINVAL,
+ TDB_LOG_USE_ERROR,
+ "tdb_get_attribute:"
+ " cannot get TDB_ATTRIBUTE_TDB1_HASHSIZE"
+ " on TDB2 tdb.");
+ attr->tdb1_hashsize.hsize = tdb->tdb1.header.hash_size;
+ break;
default:
return tdb->last_error
= tdb_logerr(tdb, TDB_ERR_EINVAL,
@@ -311,11 +331,14 @@ void tdb_unset_attribute(struct tdb_context *tdb,
break;
case TDB_ATTRIBUTE_HASH:
case TDB_ATTRIBUTE_SEED:
+ case TDB_ATTRIBUTE_TDB1_HASHSIZE:
tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
"tdb_unset_attribute: cannot unset %s after opening",
type == TDB_ATTRIBUTE_HASH
? "TDB_ATTRIBUTE_HASH"
- : "TDB_ATTRIBUTE_SEED");
+ : type == TDB_ATTRIBUTE_SEED
+ ? "TDB_ATTRIBUTE_SEED"
+ : "TDB_ATTRIBUTE_TDB1_HASHSIZE");
break;
case TDB_ATTRIBUTE_STATS:
tdb_logerr(tdb, TDB_ERR_EINVAL,
@@ -335,6 +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)
@@ -347,6 +387,8 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
ssize_t rlen;
struct tdb_header hdr;
struct tdb_attribute_seed *seed = NULL;
+ struct tdb_attribute_tdb1_hashsize *hsize_attr = NULL;
+ struct tdb_attribute_tdb1_max_dead *maxsize_attr = NULL;
tdb_bool_err berr;
enum TDB_ERROR ecode;
int openlock;
@@ -363,22 +405,18 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
} else {
tdb->name = NULL;
}
- tdb->direct_access = 0;
tdb->flags = tdb_flags;
tdb->log_fn = NULL;
- tdb->transaction = NULL;
- tdb->access = NULL;
tdb->open_flags = open_flags;
tdb->last_error = TDB_SUCCESS;
tdb->file = NULL;
tdb->openhook = NULL;
tdb->lock_fn = tdb_fcntl_lock;
tdb->unlock_fn = tdb_fcntl_unlock;
- tdb->hash_fn = jenkins_hash;
+ tdb->hash_fn = tdb_jenkins_hash;
memset(&tdb->stats, 0, sizeof(tdb->stats));
tdb->stats.base.attr = TDB_ATTRIBUTE_STATS;
tdb->stats.size = sizeof(tdb->stats);
- tdb_io_init(tdb);
while (attr) {
switch (attr->base.attr) {
@@ -393,6 +431,12 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
tdb->openhook = attr->openhook.fn;
tdb->openhook_data = attr->openhook.data;
break;
+ case TDB_ATTRIBUTE_TDB1_HASHSIZE:
+ hsize_attr = &attr->tdb1_hashsize;
+ break;
+ case TDB_ATTRIBUTE_TDB1_MAX_DEAD:
+ maxsize_attr = &attr->tdb1_max_dead;
+ break;
default:
/* These are set as normal. */
ecode = tdb_set_attribute(tdb, attr);
@@ -404,12 +448,43 @@ 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;
}
+ if (hsize_attr) {
+ if (!(tdb_flags & TDB_VERSION1) ||
+ (!(tdb_flags & TDB_INTERNAL) && !(open_flags & O_CREAT))) {
+ ecode = tdb_logerr(tdb, TDB_ERR_EINVAL,
+ TDB_LOG_USE_ERROR,
+ "tdb_open: can only use"
+ " TDB_ATTRIBUTE_TDB1_HASHSIZE when"
+ " creating a TDB_VERSION1 tdb");
+ goto fail;
+ }
+ }
+
+ if (seed) {
+ if (tdb_flags & TDB_VERSION1) {
+ ecode = tdb_logerr(tdb, TDB_ERR_EINVAL,
+ TDB_LOG_USE_ERROR,
+ "tdb_open:"
+ " cannot set TDB_ATTRIBUTE_SEED"
+ " on TDB1 tdb.");
+ goto fail;
+ } else if (!(tdb_flags & TDB_INTERNAL)
+ && !(open_flags & O_CREAT)) {
+ ecode = tdb_logerr(tdb, TDB_ERR_EINVAL,
+ TDB_LOG_USE_ERROR,
+ "tdb_open:"
+ " cannot set TDB_ATTRIBUTE_SEED"
+ " without O_CREAT.");
+ goto fail;
+ }
+ }
+
if ((open_flags & O_ACCMODE) == O_WRONLY) {
ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
"tdb_open: can't open tdb %s write-only",
@@ -439,13 +514,21 @@ 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, maxsize_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;
}
@@ -483,12 +566,11 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
goto fail;
}
- tdb->file->next = files;
tdb->file->fd = fd;
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 */
@@ -512,6 +594,12 @@ 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, maxsize_attr);
+ if (ecode != TDB_SUCCESS)
+ goto fail;
+ goto finished;
+ }
ecode = tdb_new_database(tdb, seed, &hdr);
if (ecode != TDB_SUCCESS) {
goto fail;
@@ -523,6 +611,12 @@ 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, maxsize_attr);
+ 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;
@@ -532,6 +626,12 @@ 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, maxsize_attr);
+ if (!ecode)
+ goto finished;
+ goto fail;
+ }
/* wrong version */
ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
"tdb_open:"
@@ -547,6 +647,16 @@ 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;
@@ -571,34 +681,48 @@ 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->methods->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;
- }
-
- /* Add to linked list if we're new. */
- if (tdb->file->refcnt == 1)
- files = tdb->file;
+ tdb->next = tdbs;
+ tdbs = tdb;
return tdb;
fail:
@@ -653,11 +777,18 @@ fail_errno:
int tdb_close(struct tdb_context *tdb)
{
int ret = 0;
+ struct tdb_context **i;
tdb_trace(tdb, "tdb_close");
- if (tdb->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) {
@@ -667,24 +798,22 @@ int tdb_close(struct tdb_context *tdb)
tdb_munmap(tdb->file);
}
if (tdb->file) {
- struct tdb_file **i;
-
tdb_lock_cleanup(tdb);
if (--tdb->file->refcnt == 0) {
ret = close(tdb->file->fd);
-
- /* Remove from files list */
- for (i = &files; *i; i = &(*i)->next) {
- if (*i == tdb->file) {
- *i = tdb->file->next;
- break;
- }
- }
free(tdb->file->lockrecs);
free(tdb->file);
}
}
+ /* Remove from tdbs list */
+ for (i = &tdbs; *i; i = &(*i)->next) {
+ if (*i == tdb) {
+ *i = tdb->next;
+ break;
+ }
+ }
+
#ifdef TDB_TRACE
close(tdb->tracefd);
#endif
@@ -692,3 +821,13 @@ int tdb_close(struct tdb_context *tdb)
return ret;
}
+
+void tdb_foreach_(int (*fn)(struct tdb_context *, void *), void *p)
+{
+ struct tdb_context *i;
+
+ for (i = tdbs; i; i = i->next) {
+ if (fn(i, p) != 0)
+ break;
+ }
+}