#include "includes.h"
#include "system/filesys.h"
#include "util_tdb.h"
+#include "cbuf.h"
#undef malloc
#undef realloc
#undef calloc
#undef strdup
-/* these are little tdb utility functions that are meant to make
- dealing with a tdb database a little less cumbersome in Samba */
-
-static SIG_ATOMIC_T gotalarm;
-
-/***************************************************************
- Signal function to tell us we timed out.
-****************************************************************/
-
-static void gotalarm_sig(int signum)
-{
- gotalarm = 1;
-}
-
-/****************************************************************************
- Lock a chain with timeout (in seconds).
-****************************************************************************/
-
-static int tdb_chainlock_with_timeout_internal( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout, int rw_type)
-{
- /* Allow tdb_chainlock to be interrupted by an alarm. */
- int ret;
- gotalarm = 0;
-
- if (timeout) {
- CatchSignal(SIGALRM, gotalarm_sig);
- tdb_setalarm_sigptr(tdb, &gotalarm);
- alarm(timeout);
- }
-
- if (rw_type == F_RDLCK)
- ret = tdb_chainlock_read(tdb, key);
- else
- ret = tdb_chainlock(tdb, key);
-
- if (timeout) {
- alarm(0);
- tdb_setalarm_sigptr(tdb, NULL);
- CatchSignal(SIGALRM, SIG_IGN);
- if (gotalarm && (ret == -1)) {
- DEBUG(0,("tdb_chainlock_with_timeout_internal: alarm (%u) timed out for key %s in tdb %s\n",
- timeout, key.dptr, tdb_name(tdb)));
- /* TODO: If we time out waiting for a lock, it might
- * be nice to use F_GETLK to get the pid of the
- * process currently holding the lock and print that
- * as part of the debugging message. -- mbp */
- return -1;
- }
- }
-
- return ret;
-}
-
-/****************************************************************************
- Write lock a chain. Return -1 if timeout or lock failed.
-****************************************************************************/
-
-int tdb_chainlock_with_timeout( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout)
-{
- return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_WRLCK);
-}
-
-int tdb_lock_bystring_with_timeout(TDB_CONTEXT *tdb, const char *keyval,
- int timeout)
-{
- TDB_DATA key = string_term_tdb_data(keyval);
-
- return tdb_chainlock_with_timeout(tdb, key, timeout);
-}
-
-/****************************************************************************
- Read lock a chain by string. Return -1 if timeout or lock failed.
-****************************************************************************/
-
-int tdb_read_lock_bystring_with_timeout(TDB_CONTEXT *tdb, const char *keyval, unsigned int timeout)
-{
- TDB_DATA key = string_term_tdb_data(keyval);
-
- return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_RDLCK);
-}
-
-
-
-
-int tdb_trans_store_bystring(TDB_CONTEXT *tdb, const char *keystr,
- TDB_DATA data, int flags)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_trans_store(tdb, key, data, flags);
-}
-
/****************************************************************************
Useful pair of routines for packing/unpacking data consisting of
integers and strings.
****************************************************************************/
-static size_t tdb_pack_va(uint8 *buf, int bufsize, const char *fmt, va_list ap)
+static size_t tdb_pack_va(uint8_t *buf, int bufsize, const char *fmt, va_list ap)
{
- uint8 bt;
- uint16 w;
- uint32 d;
+ uint8_t bt;
+ uint16_t w;
+ uint32_t d;
int i;
void *p;
int len;
char *s;
char c;
- uint8 *buf0 = buf;
+ uint8_t *buf0 = buf;
const char *fmt0 = fmt;
int bufsize0 = bufsize;
switch ((c = *fmt++)) {
case 'b': /* unsigned 8-bit integer */
len = 1;
- bt = (uint8)va_arg(ap, int);
+ bt = (uint8_t)va_arg(ap, int);
if (bufsize && bufsize >= len)
SSVAL(buf, 0, bt);
break;
case 'w': /* unsigned 16-bit integer */
len = 2;
- w = (uint16)va_arg(ap, int);
+ w = (uint16_t)va_arg(ap, int);
if (bufsize && bufsize >= len)
SSVAL(buf, 0, w);
break;
case 'd': /* signed 32-bit integer (standard int in most systems) */
len = 4;
- d = va_arg(ap, uint32);
+ d = va_arg(ap, uint32_t);
if (bufsize && bufsize >= len)
SIVAL(buf, 0, d);
break;
return PTR_DIFF(buf, buf0);
}
-size_t tdb_pack(uint8 *buf, int bufsize, const char *fmt, ...)
+size_t tdb_pack(uint8_t *buf, int bufsize, const char *fmt, ...)
{
va_list ap;
size_t result;
return result;
}
-bool tdb_pack_append(TALLOC_CTX *mem_ctx, uint8 **buf, size_t *len,
- const char *fmt, ...)
-{
- va_list ap;
- size_t len1, len2;
-
- va_start(ap, fmt);
- len1 = tdb_pack_va(NULL, 0, fmt, ap);
- va_end(ap);
-
- if (mem_ctx != NULL) {
- *buf = talloc_realloc(mem_ctx, *buf, uint8,
- (*len) + len1);
- } else {
- *buf = SMB_REALLOC_ARRAY(*buf, uint8, (*len) + len1);
- }
-
- if (*buf == NULL) {
- return False;
- }
-
- va_start(ap, fmt);
- len2 = tdb_pack_va((*buf)+(*len), len1, fmt, ap);
- va_end(ap);
-
- if (len1 != len2) {
- return False;
- }
-
- *len += len2;
-
- return True;
-}
-
/****************************************************************************
Useful pair of routines for packing/unpacking data consisting of
integers and strings.
****************************************************************************/
-int tdb_unpack(const uint8 *buf, int bufsize, const char *fmt, ...)
+int tdb_unpack(const uint8_t *buf, int in_bufsize, const char *fmt, ...)
{
va_list ap;
- uint8 *bt;
- uint16 *w;
- uint32 *d;
- int len;
- int *i;
+ uint8_t *bt;
+ uint16_t *w;
+ uint32_t *d;
+ size_t bufsize = in_bufsize;
+ size_t len;
+ uint32_t *i;
void **p;
char *s, **b, **ps;
char c;
- const uint8 *buf0 = buf;
+ const uint8_t *buf0 = buf;
const char *fmt0 = fmt;
- int bufsize0 = bufsize;
va_start(ap, fmt);
switch ((c=*fmt++)) {
case 'b': /* unsigned 8-bit integer */
len = 1;
- bt = va_arg(ap, uint8 *);
+ bt = va_arg(ap, uint8_t *);
if (bufsize < len)
goto no_space;
*bt = SVAL(buf, 0);
break;
case 'w': /* unsigned 16-bit integer */
len = 2;
- w = va_arg(ap, uint16 *);
+ w = va_arg(ap, uint16_t *);
if (bufsize < len)
goto no_space;
*w = SVAL(buf, 0);
break;
- case 'd': /* signed 32-bit integer (standard int in most systems) */
+ case 'd': /* unsigned 32-bit integer (standard int in most systems) */
len = 4;
- d = va_arg(ap, uint32 *);
+ d = va_arg(ap, uint32_t *);
if (bufsize < len)
goto no_space;
*d = IVAL(buf, 0);
case 'P': /* null-terminated string */
/* Return malloc'ed string. */
ps = va_arg(ap,char **);
- len = strlen((const char *)buf) + 1;
+ len = strnlen((const char *)buf, bufsize) + 1;
+ if (bufsize < len)
+ goto no_space;
*ps = SMB_STRDUP((const char *)buf);
+ if (*ps == NULL) {
+ goto no_space;
+ }
break;
case 'f': /* null-terminated string */
s = va_arg(ap,char *);
- len = strlen((const char *)buf) + 1;
+ len = strnlen((const char *)buf, bufsize) + 1;
if (bufsize < len || len > sizeof(fstring))
goto no_space;
memcpy(s, buf, len);
break;
case 'B': /* fixed-length string */
- i = va_arg(ap, int *);
+ i = va_arg(ap, uint32_t *);
b = va_arg(ap, char **);
len = 4;
if (bufsize < len)
break;
}
len += *i;
+ if (len < *i) {
+ goto no_space;
+ }
if (bufsize < len)
goto no_space;
*b = (char *)SMB_MALLOC(*i);
va_end(ap);
DEBUG(18,("tdb_unpack(%s, %d) -> %d\n",
- fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
+ fmt0, in_bufsize, (int)PTR_DIFF(buf, buf0)));
return PTR_DIFF(buf, buf0);
Log tdb messages via DEBUG().
****************************************************************************/
+static void tdb_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
+ const char *format, ...) PRINTF_ATTRIBUTE(3,4);
+
static void tdb_log(TDB_CONTEXT *tdb, enum tdb_debug_level level, const char *format, ...)
{
va_list ap;
int open_flags, mode_t mode)
{
TDB_CONTEXT *tdb;
- struct tdb_logging_context log_ctx;
+ struct tdb_logging_context log_ctx = { .log_fn = tdb_log };
if (!lp_use_mmap())
tdb_flags |= TDB_NOMMAP;
- log_ctx.log_fn = tdb_log;
- log_ctx.log_private = NULL;
-
if ((hash_size == 0) && (name != NULL)) {
const char *base = strrchr_m(name, '/');
if (base != NULL) {
hash_size = lp_parm_int(-1, "tdb_hashsize", base, 0);
}
- tdb = tdb_open_ex(name, hash_size, tdb_flags,
+ tdb = tdb_open_ex(name, hash_size, tdb_flags,
open_flags, mode, &log_ctx, NULL);
if (!tdb)
return NULL;
return tdb;
}
-/****************************************************************************
- tdb_store, wrapped in a transaction. This way we make sure that a process
- that dies within writing does not leave a corrupt tdb behind.
-****************************************************************************/
+int tdb_data_cmp(TDB_DATA t1, TDB_DATA t2)
+{
+ int ret;
+ if (t1.dptr == NULL && t2.dptr != NULL) {
+ return -1;
+ }
+ if (t1.dptr != NULL && t2.dptr == NULL) {
+ return 1;
+ }
+ if (t1.dptr == t2.dptr) {
+ return t1.dsize - t2.dsize;
+ }
+ ret = memcmp(t1.dptr, t2.dptr, MIN(t1.dsize, t2.dsize));
+ if (ret == 0) {
+ return t1.dsize - t2.dsize;
+ }
+ return ret;
+}
-int tdb_trans_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
- int flag)
+char *tdb_data_string(TALLOC_CTX *mem_ctx, TDB_DATA d)
{
- int res;
+ int len;
+ char *ret = NULL;
+ cbuf *ost = cbuf_new(mem_ctx);
- if ((res = tdb_transaction_start(tdb)) != 0) {
- DEBUG(5, ("tdb_transaction_start failed\n"));
- return res;
+ if (ost == NULL) {
+ return NULL;
}
- if ((res = tdb_store(tdb, key, dbuf, flag)) != 0) {
- DEBUG(10, ("tdb_store failed\n"));
- if (tdb_transaction_cancel(tdb) != 0) {
- smb_panic("Cancelling transaction failed");
- }
- return res;
+ len = cbuf_printf(ost, "%zu:", d.dsize);
+ if (len == -1) {
+ goto done;
}
- if ((res = tdb_transaction_commit(tdb)) != 0) {
- DEBUG(5, ("tdb_transaction_commit failed\n"));
+ if (d.dptr == NULL) {
+ len = cbuf_puts(ost, "<NULL>", -1);
+ } else {
+ len = cbuf_print_quoted(ost, (const char*)d.dptr, d.dsize);
}
+ if (len == -1) {
+ goto done;
+ }
+
+ cbuf_swapptr(ost, &ret, 0);
+ talloc_steal(mem_ctx, ret);
+
+done:
+ talloc_free(ost);
+ return ret;
+}
+
+static sig_atomic_t gotalarm;
+
+/***************************************************************
+ Signal function to tell us we timed out.
+****************************************************************/
- return res;
+static void gotalarm_sig(int signum)
+{
+ gotalarm = 1;
}
/****************************************************************************
- tdb_delete, wrapped in a transaction. This way we make sure that a process
- that dies within deleting does not leave a corrupt tdb behind.
+ Lock a chain with timeout (in seconds).
****************************************************************************/
-int tdb_trans_delete(struct tdb_context *tdb, TDB_DATA key)
+static int tdb_chainlock_with_timeout_internal( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout, int rw_type)
{
- int res;
+ /* Allow tdb_chainlock to be interrupted by an alarm. */
+ int ret;
+ gotalarm = 0;
- if ((res = tdb_transaction_start(tdb)) != 0) {
- DEBUG(5, ("tdb_transaction_start failed\n"));
- return res;
+ if (timeout) {
+ CatchSignal(SIGALRM, gotalarm_sig);
+ tdb_setalarm_sigptr(tdb, &gotalarm);
+ alarm(timeout);
}
- if ((res = tdb_delete(tdb, key)) != 0) {
- DEBUG(10, ("tdb_delete failed\n"));
- if (tdb_transaction_cancel(tdb) != 0) {
- smb_panic("Cancelling transaction failed");
+ if (rw_type == F_RDLCK)
+ ret = tdb_chainlock_read(tdb, key);
+ else
+ ret = tdb_chainlock(tdb, key);
+
+ if (timeout) {
+ alarm(0);
+ tdb_setalarm_sigptr(tdb, NULL);
+ CatchSignal(SIGALRM, SIG_IGN);
+ if (gotalarm && (ret != 0)) {
+ DEBUG(0,("tdb_chainlock_with_timeout_internal: alarm (%u) timed out for key %s in tdb %s\n",
+ timeout, key.dptr, tdb_name(tdb)));
+ /* TODO: If we time out waiting for a lock, it might
+ * be nice to use F_GETLK to get the pid of the
+ * process currently holding the lock and print that
+ * as part of the debugging message. -- mbp */
+ return -1;
}
- return res;
}
- if ((res = tdb_transaction_commit(tdb)) != 0) {
- DEBUG(5, ("tdb_transaction_commit failed\n"));
- }
+ return ret == 0 ? 0 : -1;
+}
+
+/****************************************************************************
+ Write lock a chain. Return non-zero if timeout or lock failed.
+****************************************************************************/
- return res;
+int tdb_chainlock_with_timeout( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout)
+{
+ return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_WRLCK);
}
-NTSTATUS map_nt_error_from_tdb(enum TDB_ERROR err)
+int tdb_lock_bystring_with_timeout(TDB_CONTEXT *tdb, const char *keyval,
+ int timeout)
{
- NTSTATUS result = NT_STATUS_INTERNAL_ERROR;
-
- switch (err) {
- case TDB_SUCCESS:
- result = NT_STATUS_OK;
- break;
- case TDB_ERR_CORRUPT:
- result = NT_STATUS_INTERNAL_DB_CORRUPTION;
- break;
- case TDB_ERR_IO:
- result = NT_STATUS_UNEXPECTED_IO_ERROR;
- break;
- case TDB_ERR_OOM:
- result = NT_STATUS_NO_MEMORY;
- break;
- case TDB_ERR_EXISTS:
- result = NT_STATUS_OBJECT_NAME_COLLISION;
- break;
-
- case TDB_ERR_LOCK:
- /*
- * TDB_ERR_LOCK is very broad, we could for example
- * distinguish between fcntl locks and invalid lock
- * sequences. So NT_STATUS_FILE_LOCK_CONFLICT is a
- * compromise.
- */
- result = NT_STATUS_FILE_LOCK_CONFLICT;
- break;
-
- case TDB_ERR_NOLOCK:
- case TDB_ERR_LOCK_TIMEOUT:
- /*
- * These two ones in the enum are not actually used
- */
- result = NT_STATUS_FILE_LOCK_CONFLICT;
- break;
- case TDB_ERR_NOEXIST:
- result = NT_STATUS_NOT_FOUND;
- break;
- case TDB_ERR_EINVAL:
- result = NT_STATUS_INVALID_PARAMETER;
- break;
- case TDB_ERR_RDONLY:
- result = NT_STATUS_ACCESS_DENIED;
- break;
- case TDB_ERR_NESTING:
- result = NT_STATUS_INTERNAL_ERROR;
- break;
- };
- return result;
+ TDB_DATA key = string_term_tdb_data(keyval);
+
+ return tdb_chainlock_with_timeout(tdb, key, timeout);
}
-int tdb_data_cmp(TDB_DATA t1, TDB_DATA t2)
+/****************************************************************************
+ Read lock a chain by string. Return non-zero if timeout or lock failed.
+****************************************************************************/
+
+int tdb_read_lock_bystring_with_timeout(TDB_CONTEXT *tdb, const char *keyval, unsigned int timeout)
{
- int ret;
- if (t1.dptr == NULL && t2.dptr != NULL) {
- return -1;
- }
- if (t1.dptr != NULL && t2.dptr == NULL) {
- return 1;
- }
- if (t1.dptr == t2.dptr) {
- return t1.dsize - t2.dsize;
- }
- ret = memcmp(t1.dptr, t2.dptr, MIN(t1.dsize, t2.dsize));
- if (ret == 0) {
- return t1.dsize - t2.dsize;
- }
- return ret;
+ TDB_DATA key = string_term_tdb_data(keyval);
+
+ return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_RDLCK);
}
git.samba.org / samba.git / blobdiff