#include "private.h"
+#include <ccan/asprintf/asprintf.h>
#include <ccan/tdb2/tdb2.h>
-#include <ccan/build_assert/build_assert.h>
-#include <ccan/likely/likely.h>
#include <assert.h>
+#include <stdarg.h>
/* The null return. */
struct tdb_data tdb_null = { .dptr = NULL, .dsize = 0 };
/* all contexts, to ensure no double-opens (fcntl locks don't nest!) */
static struct tdb_context *tdbs = NULL;
-PRINTF_FMT(4, 5) static void
-null_log_fn(struct tdb_context *tdb,
- enum tdb_debug_level level, void *priv,
- const char *fmt, ...)
-{
-}
-
static bool tdb_already_open(dev_t device, ino_t ino)
{
struct tdb_context *i;
return false;
}
+static bool read_all(int fd, void *buf, size_t len)
+{
+ while (len) {
+ ssize_t ret;
+ ret = read(fd, buf, len);
+ if (ret < 0)
+ return false;
+ if (ret == 0) {
+ /* ETOOSHORT? */
+ errno = EWOULDBLOCK;
+ return false;
+ }
+ buf = (char *)buf + ret;
+ len -= ret;
+ }
+ return true;
+}
+
static uint64_t random_number(struct tdb_context *tdb)
{
int fd;
fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0) {
- if (tdb_read_all(fd, &ret, sizeof(ret))) {
- tdb->log(tdb, TDB_DEBUG_TRACE, tdb->log_priv,
- "tdb_open: random from /dev/urandom\n");
+ if (read_all(fd, &ret, sizeof(ret))) {
close(fd);
return ret;
}
char reply[1 + sizeof(uint64_t)];
int r = read(fd, reply, sizeof(reply));
if (r > 1) {
- tdb->log(tdb, TDB_DEBUG_TRACE, tdb->log_priv,
- "tdb_open: %u random bytes from"
- " /dev/egd-pool\n", r-1);
/* Copy at least some bytes. */
memcpy(&ret, reply+1, r - 1);
if (reply[0] == sizeof(uint64_t)
/* Fallback: pid and time. */
gettimeofday(&now, NULL);
ret = getpid() * 100132289ULL + now.tv_sec * 1000000ULL + now.tv_usec;
- tdb->log(tdb, TDB_DEBUG_TRACE, tdb->log_priv,
- "tdb_open: random from getpid and time\n");
+ tdb_logerr(tdb, TDB_SUCCESS, TDB_LOG_WARNING,
+ "tdb_open: random from getpid and time");
return ret;
}
struct new_database {
struct tdb_header hdr;
- struct tdb_freelist flist;
+ struct tdb_freetable ftable;
};
/* initialise a new database */
-static int tdb_new_database(struct tdb_context *tdb,
- struct tdb_attribute_seed *seed,
- struct tdb_header *hdr)
+static enum TDB_ERROR tdb_new_database(struct tdb_context *tdb,
+ struct tdb_attribute_seed *seed,
+ struct tdb_header *hdr)
{
/* We make it up in memory, then write it out if not internal */
struct new_database newdb;
unsigned int magic_len;
+ ssize_t rlen;
+ enum TDB_ERROR ecode;
/* Fill in the header */
newdb.hdr.version = TDB_VERSION;
sizeof(newdb.hdr.hash_test),
newdb.hdr.hash_seed,
tdb->hash_priv);
+ newdb.hdr.recovery = 0;
+ newdb.hdr.features_used = newdb.hdr.features_offered = TDB_FEATURE_MASK;
memset(newdb.hdr.reserved, 0, sizeof(newdb.hdr.reserved));
/* Initial hashes are empty. */
memset(newdb.hdr.hashtable, 0, sizeof(newdb.hdr.hashtable));
/* Free is empty. */
- newdb.hdr.free_list = offsetof(struct new_database, flist);
- memset(&newdb.flist, 0, sizeof(newdb.flist));
- set_header(NULL, &newdb.flist.hdr, 0,
- sizeof(newdb.flist) - sizeof(newdb.flist.hdr),
- sizeof(newdb.flist) - sizeof(newdb.flist.hdr), 1);
+ newdb.hdr.free_table = offsetof(struct new_database, ftable);
+ memset(&newdb.ftable, 0, sizeof(newdb.ftable));
+ ecode = set_header(NULL, &newdb.ftable.hdr, TDB_FTABLE_MAGIC, 0,
+ sizeof(newdb.ftable) - sizeof(newdb.ftable.hdr),
+ sizeof(newdb.ftable) - sizeof(newdb.ftable.hdr),
+ 0);
+ if (ecode != TDB_SUCCESS) {
+ return ecode;
+ }
/* Magic food */
memset(newdb.hdr.magic_food, 0, sizeof(newdb.hdr.magic_food));
tdb->map_size = sizeof(newdb);
tdb->map_ptr = malloc(tdb->map_size);
if (!tdb->map_ptr) {
- tdb->ecode = TDB_ERR_OOM;
- return -1;
+ return tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+ "tdb_new_database:"
+ " failed to allocate");
}
memcpy(tdb->map_ptr, &newdb, tdb->map_size);
- return 0;
+ return TDB_SUCCESS;
+ }
+ if (lseek(tdb->fd, 0, SEEK_SET) == -1) {
+ return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_new_database:"
+ " failed to seek: %s", strerror(errno));
}
- if (lseek(tdb->fd, 0, SEEK_SET) == -1)
- return -1;
- if (ftruncate(tdb->fd, 0) == -1)
- return -1;
+ if (ftruncate(tdb->fd, 0) == -1) {
+ return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_new_database:"
+ " failed to truncate: %s", strerror(errno));
+ }
- if (!tdb_pwrite_all(tdb->fd, &newdb, sizeof(newdb), 0)) {
- tdb->ecode = TDB_ERR_IO;
- return -1;
+ rlen = write(tdb->fd, &newdb, sizeof(newdb));
+ if (rlen != sizeof(newdb)) {
+ if (rlen >= 0)
+ errno = ENOSPC;
+ return tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_new_database: %zi writing header: %s",
+ rlen, strerror(errno));
}
- return 0;
+ return TDB_SUCCESS;
}
struct tdb_context *tdb_open(const char *name, int tdb_flags,
{
struct tdb_context *tdb;
struct stat st;
- int save_errno;
+ int saved_errno = 0;
uint64_t hash_test;
unsigned v;
+ ssize_t rlen;
struct tdb_header hdr;
struct tdb_attribute_seed *seed = NULL;
+ tdb_bool_err berr;
+ enum TDB_ERROR ecode;
tdb = malloc(sizeof(*tdb));
if (!tdb) {
/* Can't log this */
errno = ENOMEM;
- goto fail;
+ return NULL;
}
tdb->name = NULL;
tdb->map_ptr = NULL;
tdb->direct_access = 0;
tdb->fd = -1;
tdb->map_size = sizeof(struct tdb_header);
- tdb->ecode = TDB_SUCCESS;
tdb->flags = tdb_flags;
- tdb->log = null_log_fn;
- tdb->log_priv = NULL;
+ tdb->logfn = NULL;
tdb->transaction = NULL;
+ tdb->stats = NULL;
+ tdb->access = NULL;
tdb_hash_init(tdb);
tdb_io_init(tdb);
tdb_lock_init(tdb);
while (attr) {
switch (attr->base.attr) {
case TDB_ATTRIBUTE_LOG:
- tdb->log = attr->log.log_fn;
- tdb->log_priv = attr->log.log_private;
+ tdb->logfn = attr->log.log_fn;
+ tdb->log_private = attr->log.log_private;
break;
case TDB_ATTRIBUTE_HASH:
tdb->khash = attr->hash.hash_fn;
case TDB_ATTRIBUTE_SEED:
seed = &attr->seed;
break;
+ case TDB_ATTRIBUTE_STATS:
+ tdb->stats = &attr->stats;
+ /* They have stats we don't know about? Tell them. */
+ if (tdb->stats->size > sizeof(attr->stats))
+ tdb->stats->size = sizeof(attr->stats);
+ break;
default:
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: unknown attribute type %u\n",
- attr->base.attr);
- errno = EINVAL;
+ ecode = tdb_logerr(tdb, TDB_ERR_EINVAL,
+ TDB_LOG_USE_ERROR,
+ "tdb_open:"
+ " unknown attribute type %u",
+ attr->base.attr);
goto fail;
}
attr = attr->base.next;
}
+ if (tdb_flags & ~(TDB_INTERNAL | TDB_NOLOCK | TDB_NOMMAP | TDB_CONVERT
+ | TDB_NOSYNC)) {
+ ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+ "tdb_open: unknown flags %u", tdb_flags);
+ goto fail;
+ }
+
if ((open_flags & O_ACCMODE) == O_WRONLY) {
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: can't open tdb %s write-only\n", name);
- errno = EINVAL;
+ ecode = tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+ "tdb_open: can't open tdb %s write-only",
+ name);
goto fail;
}
if ((open_flags & O_ACCMODE) == O_RDONLY) {
tdb->read_only = true;
- /* read only databases don't do locking */
- tdb->flags |= TDB_NOLOCK;
tdb->mmap_flags = PROT_READ;
} else {
tdb->read_only = false;
/* internal databases don't need any of the rest. */
if (tdb->flags & TDB_INTERNAL) {
tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
- if (tdb_new_database(tdb, seed, &hdr) != 0) {
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: tdb_new_database failed!");
+ ecode = tdb_new_database(tdb, seed, &hdr);
+ if (ecode != TDB_SUCCESS) {
goto fail;
}
tdb_convert(tdb, &hdr.hash_seed, sizeof(hdr.hash_seed));
tdb->hash_seed = hdr.hash_seed;
- tdb_flist_init(tdb);
+ tdb_ftable_init(tdb);
return tdb;
}
if ((tdb->fd = open(name, open_flags, mode)) == -1) {
- tdb->log(tdb, TDB_DEBUG_WARNING, tdb->log_priv,
- "tdb_open: could not open file %s: %s\n",
- name, strerror(errno));
- goto fail; /* errno set by open(2) */
+ /* errno set by open(2) */
+ saved_errno = errno;
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open: could not open file %s: %s",
+ name, strerror(errno));
+ goto fail;
}
/* on exec, don't inherit the fd */
fcntl(tdb->fd, F_SETFD, v | FD_CLOEXEC);
/* ensure there is only one process initialising at once */
- if (tdb_lock_open(tdb) == -1) {
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: failed to get open lock on %s: %s\n",
- name, strerror(errno));
- goto fail; /* errno set by tdb_brlock */
- }
-
- if (!tdb_pread_all(tdb->fd, &hdr, sizeof(hdr), 0)
- || strcmp(hdr.magic_food, TDB_MAGIC_FOOD) != 0) {
- if (!(open_flags & O_CREAT)
- || tdb_new_database(tdb, seed, &hdr) == -1) {
- if (errno == 0) {
- errno = EIO; /* ie bad format or something */
- }
+ ecode = tdb_lock_open(tdb, TDB_LOCK_WAIT|TDB_LOCK_NOCHECK);
+ if (ecode != TDB_SUCCESS) {
+ goto fail;
+ }
+
+ /* If they used O_TRUNC, read will return 0. */
+ rlen = read(tdb->fd, &hdr, sizeof(hdr));
+ if (rlen == 0 && (open_flags & O_CREAT)) {
+ ecode = tdb_new_database(tdb, seed, &hdr);
+ if (ecode != TDB_SUCCESS) {
goto fail;
}
- } else if (hdr.version != TDB_VERSION) {
+ } else if (rlen < 0) {
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open: error %s reading %s",
+ strerror(errno), name);
+ goto fail;
+ } else if (rlen < sizeof(hdr)
+ || strcmp(hdr.magic_food, TDB_MAGIC_FOOD) != 0) {
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open: %s is not a tdb file", name);
+ goto fail;
+ }
+
+ if (hdr.version != TDB_VERSION) {
if (hdr.version == bswap_64(TDB_VERSION))
tdb->flags |= TDB_CONVERT;
else {
/* wrong version */
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: %s is unknown version 0x%llx\n",
- name, (long long)hdr.version);
- errno = EIO;
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open:"
+ " %s is unknown version 0x%llx",
+ name, (long long)hdr.version);
goto fail;
}
}
hash_test = tdb_hash(tdb, &hash_test, sizeof(hash_test));
if (hdr.hash_test != hash_test) {
/* wrong hash variant */
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: %s uses a different hash function\n",
- name);
- errno = EIO;
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open:"
+ " %s uses a different hash function",
+ name);
goto fail;
}
- if (fstat(tdb->fd, &st) == -1)
+ if (fstat(tdb->fd, &st) == -1) {
+ saved_errno = errno;
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open: could not stat open %s: %s",
+ name, strerror(errno));
goto fail;
+ }
/* Is it already in the open list? If so, fail. */
if (tdb_already_open(st.st_dev, st.st_ino)) {
/* FIXME */
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: %s (%d,%d) is already open in this process\n",
- name, (int)st.st_dev, (int)st.st_ino);
- errno = EBUSY;
+ ecode = tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_USE_ERROR,
+ "tdb_open: %s (%d,%d) is already open"
+ " in this process",
+ name, (int)st.st_dev, (int)st.st_ino);
goto fail;
}
tdb->name = strdup(name);
if (!tdb->name) {
- errno = ENOMEM;
+ ecode = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+ "tdb_open: failed to allocate name");
goto fail;
}
+ /* Clear any features we don't understand. */
+ if ((open_flags & O_ACCMODE) != O_RDONLY) {
+ hdr.features_used &= TDB_FEATURE_MASK;
+ if (tdb_write_convert(tdb, offsetof(struct tdb_header,
+ features_used),
+ &hdr.features_used,
+ sizeof(hdr.features_used)) == -1)
+ goto fail;
+ }
+
tdb->device = st.st_dev;
tdb->inode = st.st_ino;
tdb_unlock_open(tdb);
/* This make sure we have current map_size and mmap. */
tdb->methods->oob(tdb, tdb->map_size + 1, true);
- if (tdb_flist_init(tdb) == -1)
+ /* 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_ftable_init(tdb);
+ if (ecode != TDB_SUCCESS) {
goto fail;
+ }
tdb->next = tdbs;
tdbs = tdb;
return tdb;
fail:
- save_errno = errno;
-
- if (!tdb)
- return NULL;
+ /* Map ecode to some logical errno. */
+ if (!saved_errno) {
+ switch (ecode) {
+ case TDB_ERR_CORRUPT:
+ case TDB_ERR_IO:
+ saved_errno = EIO;
+ break;
+ case TDB_ERR_LOCK:
+ saved_errno = EWOULDBLOCK;
+ break;
+ case TDB_ERR_OOM:
+ saved_errno = ENOMEM;
+ break;
+ case TDB_ERR_EINVAL:
+ saved_errno = EINVAL;
+ break;
+ default:
+ saved_errno = EINVAL;
+ break;
+ }
+ }
#ifdef TDB_TRACE
close(tdb->tracefd);
} else
tdb_munmap(tdb);
}
+ free(tdb->lockrecs);
free((char *)tdb->name);
if (tdb->fd != -1)
if (close(tdb->fd) != 0)
- tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
- "tdb_open: failed to close tdb->fd"
- " on error!\n");
+ tdb_logerr(tdb, TDB_ERR_IO, TDB_LOG_ERROR,
+ "tdb_open: failed to close tdb->fd"
+ " on error: %s", strerror(errno));
free(tdb);
- errno = save_errno;
+ errno = saved_errno;
return NULL;
}
-/* FIXME: modify, don't rewrite! */
-static int update_rec_hdr(struct tdb_context *tdb,
- tdb_off_t off,
- tdb_len_t keylen,
- tdb_len_t datalen,
- struct tdb_used_record *rec,
- uint64_t h)
+static enum TDB_ERROR update_rec_hdr(struct tdb_context *tdb,
+ tdb_off_t off,
+ tdb_len_t keylen,
+ tdb_len_t datalen,
+ struct tdb_used_record *rec,
+ uint64_t h)
{
uint64_t dataroom = rec_data_length(rec) + rec_extra_padding(rec);
+ enum TDB_ERROR ecode;
- if (set_header(tdb, rec, keylen, datalen, keylen + dataroom, h))
- return -1;
-
- return tdb_write_convert(tdb, off, rec, sizeof(*rec));
+ ecode = set_header(tdb, rec, TDB_USED_MAGIC, keylen, datalen,
+ keylen + dataroom, h);
+ if (ecode == TDB_SUCCESS) {
+ ecode = tdb_write_convert(tdb, off, rec, sizeof(*rec));
+ }
+ return ecode;
}
-/* Returns -1 on error, 0 on OK */
-static int replace_data(struct tdb_context *tdb,
- struct hash_info *h,
- struct tdb_data key, struct tdb_data dbuf,
- tdb_off_t old_off, tdb_len_t old_room,
- bool growing)
+static enum TDB_ERROR replace_data(struct tdb_context *tdb,
+ struct hash_info *h,
+ struct tdb_data key, struct tdb_data dbuf,
+ tdb_off_t old_off, tdb_len_t old_room,
+ bool growing)
{
tdb_off_t new_off;
+ enum TDB_ERROR ecode;
/* Allocate a new record. */
- new_off = alloc(tdb, key.dsize, dbuf.dsize, h->h, growing);
- if (unlikely(new_off == TDB_OFF_ERR))
- return -1;
+ new_off = alloc(tdb, key.dsize, dbuf.dsize, h->h, TDB_USED_MAGIC,
+ growing);
+ if (TDB_OFF_IS_ERR(new_off)) {
+ return new_off;
+ }
/* We didn't like the existing one: remove it. */
if (old_off) {
- add_free_record(tdb, old_off,
- sizeof(struct tdb_used_record)
- + key.dsize + old_room);
- if (replace_in_hash(tdb, h, new_off) == -1)
- return -1;
+ add_stat(tdb, frees, 1);
+ ecode = add_free_record(tdb, old_off,
+ sizeof(struct tdb_used_record)
+ + key.dsize + old_room);
+ if (ecode == TDB_SUCCESS)
+ ecode = replace_in_hash(tdb, h, new_off);
} else {
- if (add_to_hash(tdb, h, new_off) == -1)
- return -1;
+ ecode = add_to_hash(tdb, h, new_off);
+ }
+ if (ecode != TDB_SUCCESS) {
+ return ecode;
}
new_off += sizeof(struct tdb_used_record);
- if (tdb->methods->write(tdb, new_off, key.dptr, key.dsize) == -1)
- return -1;
+ ecode = tdb->methods->twrite(tdb, new_off, key.dptr, key.dsize);
+ if (ecode != TDB_SUCCESS) {
+ return ecode;
+ }
new_off += key.dsize;
- if (tdb->methods->write(tdb, new_off, dbuf.dptr, dbuf.dsize) == -1)
- return -1;
+ ecode = tdb->methods->twrite(tdb, new_off, dbuf.dptr, dbuf.dsize);
+ if (ecode != TDB_SUCCESS) {
+ return ecode;
+ }
/* FIXME: tdb_increment_seqnum(tdb); */
- return 0;
+ return TDB_SUCCESS;
+}
+
+static enum TDB_ERROR update_data(struct tdb_context *tdb,
+ tdb_off_t off,
+ struct tdb_data dbuf,
+ tdb_len_t extra)
+{
+ enum TDB_ERROR ecode;
+
+ ecode = tdb->methods->twrite(tdb, off, dbuf.dptr, dbuf.dsize);
+ if (ecode == TDB_SUCCESS && extra) {
+ /* Put a zero in; future versions may append other data. */
+ ecode = tdb->methods->twrite(tdb, off + dbuf.dsize, "", 1);
+ }
+ return ecode;
}
-int tdb_store(struct tdb_context *tdb,
- struct tdb_data key, struct tdb_data dbuf, int flag)
+enum TDB_ERROR tdb_store(struct tdb_context *tdb,
+ struct tdb_data key, struct tdb_data dbuf, int flag)
{
struct hash_info h;
tdb_off_t off;
tdb_len_t old_room = 0;
struct tdb_used_record rec;
- int ret;
+ enum TDB_ERROR ecode;
off = find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL);
- if (unlikely(off == TDB_OFF_ERR))
- return -1;
+ if (TDB_OFF_IS_ERR(off)) {
+ return off;
+ }
/* Now we have lock on this hash bucket. */
if (flag == TDB_INSERT) {
if (off) {
- tdb->ecode = TDB_ERR_EXISTS;
- goto fail;
+ ecode = TDB_ERR_EXISTS;
+ goto out;
}
} else {
if (off) {
+ rec_extra_padding(&rec);
if (old_room >= dbuf.dsize) {
/* Can modify in-place. Easy! */
- if (update_rec_hdr(tdb, off,
- key.dsize, dbuf.dsize,
- &rec, h.h))
- goto fail;
- if (tdb->methods->write(tdb, off + sizeof(rec)
- + key.dsize,
- dbuf.dptr, dbuf.dsize))
- goto fail;
+ ecode = update_rec_hdr(tdb, off,
+ key.dsize, dbuf.dsize,
+ &rec, h.h);
+ if (ecode != TDB_SUCCESS) {
+ goto out;
+ }
+ ecode = update_data(tdb,
+ off + sizeof(rec)
+ + key.dsize, dbuf,
+ old_room - dbuf.dsize);
+ if (ecode != TDB_SUCCESS) {
+ goto out;
+ }
tdb_unlock_hashes(tdb, h.hlock_start,
h.hlock_range, F_WRLCK);
- return 0;
+ return TDB_SUCCESS;
}
- /* FIXME: See if right record is free? */
} else {
if (flag == TDB_MODIFY) {
/* if the record doesn't exist and we
are in TDB_MODIFY mode then we should fail
the store */
- tdb->ecode = TDB_ERR_NOEXIST;
- goto fail;
+ ecode = TDB_ERR_NOEXIST;
+ goto out;
}
}
}
/* If we didn't use the old record, this implies we're growing. */
- ret = replace_data(tdb, &h, key, dbuf, off, old_room, off != 0);
+ ecode = replace_data(tdb, &h, key, dbuf, off, old_room, off);
+out:
tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- return ret;
-
-fail:
- tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- return -1;
+ return ecode;
}
-int tdb_append(struct tdb_context *tdb,
- struct tdb_data key, struct tdb_data dbuf)
+enum TDB_ERROR tdb_append(struct tdb_context *tdb,
+ struct tdb_data key, struct tdb_data dbuf)
{
struct hash_info h;
tdb_off_t off;
tdb_len_t old_room = 0, old_dlen;
unsigned char *newdata;
struct tdb_data new_dbuf;
- int ret;
+ enum TDB_ERROR ecode;
off = find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL);
- if (unlikely(off == TDB_OFF_ERR))
- return -1;
+ if (TDB_OFF_IS_ERR(off)) {
+ return off;
+ }
if (off) {
old_dlen = rec_data_length(&rec);
/* Fast path: can append in place. */
if (rec_extra_padding(&rec) >= dbuf.dsize) {
- if (update_rec_hdr(tdb, off, key.dsize,
- old_dlen + dbuf.dsize, &rec, h.h))
- goto fail;
+ ecode = update_rec_hdr(tdb, off, key.dsize,
+ old_dlen + dbuf.dsize, &rec,
+ h.h);
+ if (ecode != TDB_SUCCESS) {
+ goto out;
+ }
off += sizeof(rec) + key.dsize + old_dlen;
- if (tdb->methods->write(tdb, off, dbuf.dptr,
- dbuf.dsize) == -1)
- goto fail;
-
- /* FIXME: tdb_increment_seqnum(tdb); */
- tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
- F_WRLCK);
- return 0;
+ ecode = update_data(tdb, off, dbuf,
+ rec_extra_padding(&rec));
+ goto out;
}
- /* FIXME: Check right record free? */
/* Slow path. */
newdata = malloc(key.dsize + old_dlen + dbuf.dsize);
if (!newdata) {
- tdb->ecode = TDB_ERR_OOM;
- tdb->log(tdb, TDB_DEBUG_FATAL, tdb->log_priv,
- "tdb_append: cannot allocate %llu bytes!\n",
- (long long)key.dsize + old_dlen + dbuf.dsize);
- goto fail;
+ ecode = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+ "tdb_append:"
+ " failed to allocate %zu bytes",
+ (size_t)(key.dsize + old_dlen
+ + dbuf.dsize));
+ goto out;
}
- if (tdb->methods->read(tdb, off + sizeof(rec) + key.dsize,
- newdata, old_dlen) != 0) {
- free(newdata);
- goto fail;
+ ecode = tdb->methods->tread(tdb, off + sizeof(rec) + key.dsize,
+ newdata, old_dlen);
+ if (ecode != TDB_SUCCESS) {
+ goto out_free_newdata;
}
memcpy(newdata + old_dlen, dbuf.dptr, dbuf.dsize);
new_dbuf.dptr = newdata;
}
/* If they're using tdb_append(), it implies they're growing record. */
- ret = replace_data(tdb, &h, key, new_dbuf, off, old_room, true);
- tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- free(newdata);
+ ecode = replace_data(tdb, &h, key, new_dbuf, off, old_room, true);
- return ret;
-
-fail:
+out_free_newdata:
+ free(newdata);
+out:
tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- return -1;
+ return ecode;
}
-struct tdb_data tdb_fetch(struct tdb_context *tdb, struct tdb_data key)
+enum TDB_ERROR tdb_fetch(struct tdb_context *tdb, struct tdb_data key,
+ struct tdb_data *data)
{
tdb_off_t off;
struct tdb_used_record rec;
struct hash_info h;
- struct tdb_data ret;
+ enum TDB_ERROR ecode;
off = find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL);
- if (unlikely(off == TDB_OFF_ERR))
- return tdb_null;
+ if (TDB_OFF_IS_ERR(off)) {
+ return off;
+ }
if (!off) {
- tdb->ecode = TDB_ERR_NOEXIST;
- ret = tdb_null;
+ ecode = TDB_ERR_NOEXIST;
} else {
- ret.dsize = rec_data_length(&rec);
- ret.dptr = tdb_alloc_read(tdb, off + sizeof(rec) + key.dsize,
- ret.dsize);
+ data->dsize = rec_data_length(&rec);
+ data->dptr = tdb_alloc_read(tdb, off + sizeof(rec) + key.dsize,
+ data->dsize);
+ if (TDB_PTR_IS_ERR(data->dptr)) {
+ ecode = TDB_PTR_ERR(data->dptr);
+ } else
+ ecode = TDB_SUCCESS;
}
tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_RDLCK);
- return ret;
+ return ecode;
}
-int tdb_delete(struct tdb_context *tdb, struct tdb_data key)
+enum TDB_ERROR tdb_delete(struct tdb_context *tdb, struct tdb_data key)
{
tdb_off_t off;
struct tdb_used_record rec;
struct hash_info h;
+ enum TDB_ERROR ecode;
off = find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL);
- if (unlikely(off == TDB_OFF_ERR))
- return -1;
+ if (TDB_OFF_IS_ERR(off)) {
+ return off;
+ }
if (!off) {
- tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- tdb->ecode = TDB_ERR_NOEXIST;
- return -1;
+ ecode = TDB_ERR_NOEXIST;
+ goto unlock;
}
- if (delete_from_hash(tdb, &h) == -1)
- goto unlock_err;
+ ecode = delete_from_hash(tdb, &h);
+ if (ecode != TDB_SUCCESS) {
+ goto unlock;
+ }
/* Free the deleted entry. */
- if (add_free_record(tdb, off,
- sizeof(struct tdb_used_record)
- + rec_key_length(&rec)
- + rec_data_length(&rec)
- + rec_extra_padding(&rec)) != 0)
- goto unlock_err;
-
- tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- return 0;
+ add_stat(tdb, frees, 1);
+ ecode = add_free_record(tdb, off,
+ sizeof(struct tdb_used_record)
+ + rec_key_length(&rec)
+ + rec_data_length(&rec)
+ + rec_extra_padding(&rec));
-unlock_err:
+unlock:
tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_WRLCK);
- return -1;
+ return ecode;
}
int tdb_close(struct tdb_context *tdb)
struct tdb_context **i;
int ret = 0;
- /* FIXME:
+ tdb_trace(tdb, "tdb_close");
+
if (tdb->transaction) {
tdb_transaction_cancel(tdb);
}
- */
- tdb_trace(tdb, "tdb_close");
if (tdb->map_ptr) {
if (tdb->flags & TDB_INTERNAL)
return ret;
}
-enum TDB_ERROR tdb_error(struct tdb_context *tdb)
+unsigned int tdb_get_flags(struct tdb_context *tdb)
+{
+ return tdb->flags;
+}
+
+void tdb_add_flag(struct tdb_context *tdb, unsigned flag)
+{
+ if (tdb->flags & TDB_INTERNAL) {
+ tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+ "tdb_add_flag: internal db");
+ return;
+ }
+ switch (flag) {
+ case TDB_NOLOCK:
+ tdb->flags |= TDB_NOLOCK;
+ break;
+ case TDB_NOMMAP:
+ tdb->flags |= TDB_NOMMAP;
+ tdb_munmap(tdb);
+ break;
+ case TDB_NOSYNC:
+ tdb->flags |= TDB_NOSYNC;
+ break;
+ default:
+ tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+ "tdb_add_flag: Unknown flag %u", flag);
+ }
+}
+
+void tdb_remove_flag(struct tdb_context *tdb, unsigned flag)
{
- return tdb->ecode;
+ if (tdb->flags & TDB_INTERNAL) {
+ tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+ "tdb_remove_flag: internal db");
+ return;
+ }
+ switch (flag) {
+ case TDB_NOLOCK:
+ tdb->flags &= ~TDB_NOLOCK;
+ break;
+ case TDB_NOMMAP:
+ tdb->flags &= ~TDB_NOMMAP;
+ tdb_mmap(tdb);
+ break;
+ case TDB_NOSYNC:
+ tdb->flags &= ~TDB_NOSYNC;
+ break;
+ default:
+ tdb_logerr(tdb, TDB_ERR_EINVAL, TDB_LOG_USE_ERROR,
+ "tdb_remove_flag: Unknown flag %u", flag);
+ }
}
-const char *tdb_errorstr(struct tdb_context *tdb)
+const char *tdb_errorstr(enum TDB_ERROR ecode)
{
/* Gcc warns if you miss a case in the switch, so use that. */
- switch (tdb->ecode) {
+ switch (ecode) {
case TDB_SUCCESS: return "Success";
case TDB_ERR_CORRUPT: return "Corrupt database";
case TDB_ERR_IO: return "IO Error";
case TDB_ERR_LOCK: return "Locking error";
case TDB_ERR_OOM: return "Out of memory";
case TDB_ERR_EXISTS: return "Record exists";
- case TDB_ERR_NESTING: return "Transaction already started";
case TDB_ERR_EINVAL: return "Invalid parameter";
case TDB_ERR_NOEXIST: return "Record does not exist";
case TDB_ERR_RDONLY: return "write not permitted";
}
return "Invalid error code";
}
+
+enum TDB_ERROR COLD tdb_logerr(struct tdb_context *tdb,
+ enum TDB_ERROR ecode,
+ enum tdb_log_level level,
+ const char *fmt, ...)
+{
+ char *message;
+ va_list ap;
+ size_t len;
+ /* tdb_open paths care about errno, so save it. */
+ int saved_errno = errno;
+
+ if (!tdb->logfn)
+ return ecode;
+
+ va_start(ap, fmt);
+ len = vasprintf(&message, fmt, ap);
+ va_end(ap);
+
+ if (len < 0) {
+ tdb->logfn(tdb, TDB_LOG_ERROR, tdb->log_private,
+ "out of memory formatting message:");
+ tdb->logfn(tdb, level, tdb->log_private, fmt);
+ } else {
+ tdb->logfn(tdb, level, tdb->log_private, message);
+ free(message);
+ }
+ errno = saved_errno;
+ return ecode;
+}
projects / ccan / blobdiff