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author | Andrew Tridgell <tridge@samba.org> | 2006-09-24 02:49:04 +0000 |
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committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 12:14:36 -0500 |
commit | 3e2c696e45b24b0192ab7b1ddaf1dd4d79571609 (patch) | |
tree | 9c4423bdb006f7c183fea0c87331d23e7043d0b1 /source3/lib/ldb/ldb_tdb/ldb_tdb_wrap.c | |
parent | 0c3194816b513e3743ddcacd1eca2b683ca39b88 (diff) | |
download | samba-3e2c696e45b24b0192ab7b1ddaf1dd4d79571609.tar.gz samba-3e2c696e45b24b0192ab7b1ddaf1dd4d79571609.tar.bz2 samba-3e2c696e45b24b0192ab7b1ddaf1dd4d79571609.zip |
r18866: Jeremy and Volker have given the go-ahead on the group mapping ldb
code. Yay!
This first commit copies lib/ldb/ from Samba4. A huge congratulations
should go to Simo on this - he has put an enormous amount of work into
ldb, and it's great to see it go into the Samba3 tree.
(This used to be commit bbedf2e34315f5c420a3a05dfe22b1d5cf79f042)
Diffstat (limited to 'source3/lib/ldb/ldb_tdb/ldb_tdb_wrap.c')
-rw-r--r-- | source3/lib/ldb/ldb_tdb/ldb_tdb_wrap.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/source3/lib/ldb/ldb_tdb/ldb_tdb_wrap.c b/source3/lib/ldb/ldb_tdb/ldb_tdb_wrap.c new file mode 100644 index 0000000000..b28bf77450 --- /dev/null +++ b/source3/lib/ldb/ldb_tdb/ldb_tdb_wrap.c @@ -0,0 +1,174 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2005 + + ** NOTE! The following LGPL license applies to the ldb + ** 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#include "includes.h" +#include "ldb/include/includes.h" + +#include "ldb/ldb_tdb/ldb_tdb.h" + +/* + the purpose of this code is to work around the braindead posix locking + rules, to allow us to have a ldb open more than once while allowing + locking to work +*/ + +struct ltdb_wrap { + struct ltdb_wrap *next, *prev; + struct tdb_context *tdb; + dev_t device; + ino_t inode; +}; + +static struct ltdb_wrap *tdb_list; + +/* destroy the last connection to a tdb */ +static int ltdb_wrap_destructor(struct ltdb_wrap *w) +{ + tdb_close(w->tdb); + if (w->next) { + w->next->prev = w->prev; + } + if (w->prev) { + w->prev->next = w->next; + } + if (w == tdb_list) { + tdb_list = w->next; + } + return 0; +} + +#if defined(_SAMBA_BUILD_) && (_SAMBA_BUILD_ <= 3) +static void ltdb_log_fn(struct tdb_context *tdb, int level, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4); +static void ltdb_log_fn(struct tdb_context *tdb, int level, const char *fmt, ...) +{ + /* until we merge the tdb debug changes into samba3, we don't know + how serious the error is, and we can't go via the ldb loggin code */ + va_list ap; + const char *name = tdb_name(tdb); + char *message; + va_start(ap, fmt); + message = talloc_vasprintf(NULL, fmt, ap); + va_end(ap); + DEBUG(3, ("ltdb: tdb(%s): %s", name, message)); + talloc_free(message); +} +#else +static void ltdb_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4); +static void ltdb_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...) +{ + va_list ap; + const char *name = tdb_name(tdb); + struct ldb_context *ldb = talloc_get_type(tdb_get_logging_private(tdb), struct ldb_context); + enum ldb_debug_level ldb_level; + char *message; + va_start(ap, fmt); + message = talloc_vasprintf(ldb, fmt, ap); + va_end(ap); + + switch (level) { + case TDB_DEBUG_FATAL: + ldb_level = LDB_DEBUG_FATAL; + break; + case TDB_DEBUG_ERROR: + ldb_level = LDB_DEBUG_ERROR; + break; + case TDB_DEBUG_WARNING: + ldb_level = LDB_DEBUG_WARNING; + break; + case TDB_DEBUG_TRACE: + ldb_level = LDB_DEBUG_TRACE; + break; + default: + ldb_level = LDB_DEBUG_FATAL; + } + + ldb_debug(ldb, ldb_level, "ltdb: tdb(%s): %s", name, message); + talloc_free(message); +} +#endif + +/* + wrapped connection to a tdb database. The caller should _not_ free + this as it is not a talloc structure (as tdb does not use talloc + yet). It will auto-close when the caller frees the mem_ctx that is + passed to this call + */ +struct tdb_context *ltdb_wrap_open(TALLOC_CTX *mem_ctx, + const char *path, int hash_size, + int tdb_flags, + int open_flags, mode_t mode, + struct ldb_context *ldb) +{ + struct ltdb_wrap *w; + struct stat st; +#if defined(_SAMBA_BUILD_) && (_SAMBA_BUILD_ <= 3) + tdb_log_func log_ctx_p = ltdb_log_fn; +#else + struct tdb_logging_context log_ctx; + const struct tdb_logging_context *log_ctx_p = &log_ctx; + log_ctx.log_fn = ltdb_log_fn; + log_ctx.log_private = ldb; +#endif + + if (stat(path, &st) == 0) { + for (w=tdb_list;w;w=w->next) { + if (st.st_dev == w->device && st.st_ino == w->inode) { + talloc_reference(mem_ctx, w); + return w->tdb; + } + } + } + + w = talloc(mem_ctx, struct ltdb_wrap); + if (w == NULL) { + return NULL; + } + + w->tdb = tdb_open_ex(path, hash_size, tdb_flags, open_flags, mode, log_ctx_p, NULL); + if (w->tdb == NULL) { + talloc_free(w); + return NULL; + } + + if (fstat(tdb_fd(w->tdb), &st) != 0) { + tdb_close(w->tdb); + talloc_free(w); + return NULL; + } + + w->device = st.st_dev; + w->inode = st.st_ino; + + talloc_set_destructor(w, ltdb_wrap_destructor); + + w->next = tdb_list; + w->prev = NULL; + if (tdb_list) { + tdb_list->prev = w; + } + tdb_list = w; + + return w->tdb; +} + |