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authorJeremy Allison <jra@samba.org>2005-09-05 20:36:07 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 11:03:31 -0500
commit34721ad233227300d9c2e8b5483ba2c6c798a7da (patch)
treebf21c382d78ebda8dfcd4bd5a046cfce5da4987d /source3
parent1171bc9a99358d943f75494fcdaf1a62e594789e (diff)
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r10042: Add in external LGPL library for accessing the share mode db. Allow
others to examine & test. May not end up here eventually... Jeremy. (This used to be commit 7cc70ae63399eacd55bd0bf51ac2c7b004d761bf)
Diffstat (limited to 'source3')
-rw-r--r--source3/Makefile.in23
-rw-r--r--source3/configure.in52
-rw-r--r--source3/include/smb_share_modes.h103
-rw-r--r--source3/libsmb/smb_share_modes.c452
4 files changed, 627 insertions, 3 deletions
diff --git a/source3/Makefile.in b/source3/Makefile.in
index ff0d0ff61d..0c51b3b818 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -97,8 +97,12 @@ LIBSMBCLIENT=bin/libsmbclient.a @LIBSMBCLIENT_SHARED@
LIBSMBCLIENT_MAJOR=0
LIBSMBCLIENT_MINOR=1
+LIBSMBSHAREMODES=bin/libsmbsharemodes.a @LIBSMBSHAREMODES_SHARED@
+LIBSMBSHAREMODES_MAJOR=0
+LIBSMBSHAREMODES_MINOR=1
-FLAGS1 = $(CFLAGS) @FLAGS1@ -Iinclude -I$(srcdir)/include -I$(srcdir)/ubiqx @SMBWRAP_INC@ -I. $(CPPFLAGS) -I$(srcdir)
+
+FLAGS1 = $(CFLAGS) @FLAGS1@ -Iinclude -I$(srcdir)/include -I$(srcdir)/ubiqx @SMBWRAP_INC@ -I. $(CPPFLAGS) -I$(srcdir) -I$(srcdir)/tdb
FLAGS2 =
FLAGS3 =
FLAGS4 =
@@ -137,7 +141,7 @@ BIN_PROGS = $(BIN_PROGS1) $(BIN_PROGS2) $(BIN_PROGS3) @EXTRA_BIN_PROGS@
EVERYTHING_PROGS = bin/debug2html@EXEEXT@ bin/smbfilter@EXEEXT@ bin/talloctort@EXEEXT@ \
bin/log2pcap@EXEEXT@
-SHLIBS = @SHLIB_PROGS@ @LIBSMBCLIENT@
+SHLIBS = @SHLIB_PROGS@ @LIBSMBCLIENT@ @LIBSMBSHAREMODES@
SCRIPTS = $(srcdir)/script/smbtar $(builddir)/script/findsmb
@@ -513,6 +517,8 @@ LIBSMBCLIENT_OBJ = libsmb/libsmbclient.o libsmb/libsmb_compat.o \
$(LIBMSRPC_OBJ) $(RPC_PARSE_OBJ) \
$(SECRETS_OBJ) $(PASSDB_OBJ) $(SMBLDAP_OBJ) $(GROUPDB_OBJ)
+LIBSMBSHAREMODES_OBJ = libsmb/smb_share_modes.o tdb/tdb.o
+
CAC_OBJ = $(LIBSMBCLIENT_OBJ) \
libmsrpc/libmsrpc.o libmsrpc/libmsrpc_internal.o \
libmsrpc/cac_lsarpc.o libmsrpc/cac_winreg.o libmsrpc/cac_samr.o \
@@ -641,6 +647,7 @@ WINBIND_WINS_NSS_PICOBJS = $(WINBIND_WINS_NSS_OBJ:.o=.@PICSUFFIX@)
PICOBJS = $(SMBWRAPPER_OBJ:.o=.@PICSUFFIX@)
LIBSMBCLIENT_PICOBJS = $(LIBSMBCLIENT_OBJ:.o=.@PICSUFFIX@)
+LIBSMBSHAREMODES_PICOBJS = $(LIBSMBSHAREMODES_OBJ:.o=.@PICSUFFIX@)
CAC_PICOBJS = $(CAC_OBJ:.o=.@PICSUFFIX@)
@@ -1016,6 +1023,15 @@ bin/libsmbclient.a: $(LIBSMBCLIENT_PICOBJS)
@echo Linking libsmbclient non-shared library $@
@-$(AR) -rc $@ $(LIBSMBCLIENT_PICOBJS)
+bin/libsmbsharemodes.@SHLIBEXT@: $(LIBSMBSHAREMODES_PICOBS)
+ @echo Linking libsmbsharemodes shared library $@
+ @$(SHLD) $(LDSHFLAGS) -o $@ $(LIBSMBSHAREMODES_PICOBS) $(LDFLAGS) $(LIBS) \
+ $(KRB5LIBS) $(LDAP_LIBS) \
+ @SONAMEFLAG@`basename $@`.$(LIBSMBSHAREMODES_MAJOR)
+
+bin/libsmbsharemodes.a: $(LIBSMBSHAREMODES_PICOBJS)
+ @echo Linking libsmbsharemodes non-shared library $@
+ @-$(AR) -rc $@ $(LIBSMBSHAREMODES_PICOBJS)
bin/libmsrpc.@SHLIBEXT@: $(CAC_PICOBJS)
@echo Linking libmsrpc shared library $@
@@ -1041,6 +1057,7 @@ bin/libbigballofmud.@SHLIBEXT@: $(LIBBIGBALLOFMUD_PICOBJS)
# library.
libsmbclient: $(LIBSMBCLIENT)
+libsmbsharemodes: $(LIBSMBSHAREMODES)
bin/librpc_lsarpc.@SHLIBEXT@: $(RPC_LSA_OBJ)
@echo "Linking $@"
@@ -1461,7 +1478,7 @@ TOPFILES=dynconfig.o dynconfig.@PICSUFFIX@
clean: delheaders python_clean
-rm -f core */*~ *~ */*.o */*.@PICSUFFIX@ */*.@SHLIBEXT@ \
$(TOPFILES) $(BIN_PROGS) $(SBIN_PROGS) $(MODULES) $(TORTURE_PROGS) \
- $(LIBSMBCLIENT) $(EVERYTHING_PROGS) .headers.stamp
+ $(LIBSMBCLIENT) $(LIBSMBSHAREMODES) $(EVERYTHING_PROGS) .headers.stamp
-rm -rf t_dir
# Making this target will just make sure that the prototype files
diff --git a/source3/configure.in b/source3/configure.in
index 95df1ba476..3a77584aec 100644
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -219,6 +219,8 @@ AC_SUBST(INSTALLCLIENTCMD_SH)
AC_SUBST(INSTALLCLIENTCMD_A)
AC_SUBST(LIBSMBCLIENT_SHARED)
AC_SUBST(LIBSMBCLIENT)
+AC_SUBST(LIBSMBSHAREMODES_SHARED)
+AC_SUBST(LIBSMBSHAREMODES)
AC_SUBST(PRINT_LIBS)
AC_SUBST(AUTH_LIBS)
AC_SUBST(ACL_LIBS)
@@ -3872,6 +3874,56 @@ AC_ARG_WITH(libsmbclient,
)
+INSTALLCLIENTCMD_SH=:
+INSTALLCLIENTCMD_A=:
+INSTALLCLIENT=
+LIBSMBCLIENT_SHARED=
+LIBSMBCLIENT=
+AC_MSG_CHECKING(whether to build the libsmbsharemodes shared library)
+AC_ARG_WITH(libsmbsharemodes,
+[ --with-libsmbsharemodes Build the libsmbsharemodes shared library (default=yes if shared libs supported)],
+[ case "$withval" in
+ no)
+ AC_MSG_RESULT(no)
+ ;;
+ *)
+ if test $BLDSHARED = true; then
+ INSTALLCLIENTCMD_SH="\$(INSTALLCMD)"
+ ## build the static version of libsmbsharemodes as well
+ INSTALLCLIENTCMD_A="\$(INSTALLCMD)"
+ LIBSMBSHAREMODES_SHARED=bin/libsmbsharemodes.$SHLIBEXT
+ LIBSMBSHAREMODES=libsmbclient
+ AC_MSG_RESULT(yes)
+ else
+ enable_static=yes
+ AC_MSG_RESULT(no shared library support -- will supply static library)
+ fi
+ if test $enable_static = yes; then
+ INSTALLCLIENTCMD_A="\$(INSTALLCMD)"
+ LIBSMBCLIENT=libsmbsharemodes
+ fi
+ INSTALLCLIENT=installclientlib
+ ;;
+ esac ],
+[
+# if unspecified, default is to built it iff possible.
+ if test $BLDSHARED = true; then
+ INSTALLCLIENTCMD_SH="\$(INSTALLCMD)"
+ LIBSMBSHAREMODES_SHARED=bin/libsmbsharemodes.$SHLIBEXT
+ LIBSMBSHAREMODES=libsmbsharemodes
+ AC_MSG_RESULT(yes)
+ else
+ enable_static=yes
+ AC_MSG_RESULT(no shared library support -- will supply static library)
+ fi
+ if test $enable_static = yes; then
+ INSTALLCLIENTCMD_A="\$(INSTALLCMD)"
+ LIBSMBCLIENT=libsmbsharemodes
+ fi]
+ INSTALLCLIENT=installclientlib
+)
+
+
#################################################
# these tests are taken from the GNU fileutils package
AC_CHECKING(how to get filesystem space usage)
diff --git a/source3/include/smb_share_modes.h b/source3/include/smb_share_modes.h
new file mode 100644
index 0000000000..5a79e171d5
--- /dev/null
+++ b/source3/include/smb_share_modes.h
@@ -0,0 +1,103 @@
+/*
+ Samba share mode database library.
+
+ Copyright (C) Jeremy Allison 2005.
+
+ 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
+*/
+
+#ifndef _SMB_SHARE_MODES_H_
+#define _SMB_STATE_MODES_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include "tdb.h"
+
+/* Database context handle. */
+struct smbdb_ctx {
+ TDB_CONTEXT *smb_tdb;
+};
+
+/* Share mode entry. */
+/*
+ We use 64 bit types for device and inode as
+ we don't know what size mode Samba has been
+ compiled in - dev/ino may be 32, may be 64
+ bits. This interface copes with either.
+*/
+
+struct smb_share_mode_entry {
+ uint64_t dev;
+ uint64_t ino;
+ uint32_t share_access;
+ uint32_t access_mask;
+ struct timeval open_time;
+ uint32_t file_id;
+ pid_t pid;
+};
+
+/*
+ * open/close sharemode database.
+ */
+
+struct smbdb_ctx *smb_share_mode_db_open(const char *db_path);
+int smb_share_mode_db_close(struct smbdb_ctx *db_ctx);
+
+/*
+ * lock/unlock entry in sharemode database.
+ */
+
+int smb_lock_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino);
+
+int smb_unlock_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino);
+
+/*
+ * Share mode database accessor functions.
+ */
+
+int smb_get_share_mode_entries(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ struct smb_share_mode_entry **pp_list,
+ unsigned char *p_delete_on_close);
+
+int smb_create_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ const struct smb_share_mode_entry *set_entry,
+ const char *path);
+
+int smb_delete_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ const struct smb_share_mode_entry *set_entry);
+
+int smb_change_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ const struct smb_share_mode_entry *set_entry,
+ const struct smb_share_mode_entry *new_entry);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/source3/libsmb/smb_share_modes.c b/source3/libsmb/smb_share_modes.c
new file mode 100644
index 0000000000..0ba68aed06
--- /dev/null
+++ b/source3/libsmb/smb_share_modes.c
@@ -0,0 +1,452 @@
+/*
+ Samba share mode database library external interface library.
+ Used by non-Samba products needing access to the Samba share mode db.
+
+ Copyright (C) Jeremy Allison 2005.
+
+ 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 "smb_share_modes.h"
+
+/*
+ * open/close sharemode database.
+ */
+
+struct smbdb_ctx *smb_share_mode_db_open(const char *db_path)
+{
+ struct smbdb_ctx *smb_db = SMB_MALLOC_P(struct smbdb_ctx);
+
+ if (!smb_db) {
+ return NULL;
+ }
+
+ memset(smb_db, '\0', sizeof(struct smbdb_ctx));
+
+ smb_db->smb_tdb = tdb_open_log(lock_path("locking.tdb"),
+ 0, TDB_DEFAULT|TDB_CLEAR_IF_FIRST,
+ O_RDWR|O_CREAT,
+ 0644);
+
+ if (!smb_db->smb_tdb) {
+ free(smb_db);
+ return NULL;
+ }
+
+ /* Should check that this is the correct version.... */
+ return smb_db;
+}
+
+int smb_share_mode_db_close(struct smbdb_ctx *db_ctx)
+{
+ int ret = tdb_close(db_ctx->smb_tdb);
+ free(db_ctx);
+ return ret;
+}
+
+/* Create locking key. */
+
+struct samba_locking_key {
+ SMB_DEV_T dev;
+ SMB_INO_T ino;
+};
+
+static TDB_DATA get_locking_key(uint64_t dev, uint64_t ino)
+{
+ static struct samba_locking_key lk;
+ TDB_DATA ld;
+
+ memset(&lk, '\0', sizeof(struct samba_locking_key));
+ lk.dev = (SMB_DEV_T)dev;
+ lk.ino = (SMB_INO_T)ino;
+ ld.dptr = (char *)&lk;
+ ld.dsize = sizeof(lk);
+ return ld;
+}
+
+/*
+ * lock/unlock entry in sharemode database.
+ */
+
+int smb_lock_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino)
+{
+ return tdb_chainlock(db_ctx->smb_tdb, get_locking_key(dev, ino));
+}
+
+int smb_unlock_share_mode_entry(struct smbdb_ctx *db_ctx,
+ dev_t dev,
+ ino_t ino)
+{
+ return tdb_chainunlock(db_ctx->smb_tdb, get_locking_key(dev, ino));
+}
+
+/* Internal structure of Samba share mode db. */
+/* FIXME ! This should be moved into a Samba include file. */
+
+struct locking_data {
+ union {
+ struct {
+ int num_share_mode_entries;
+ BOOL delete_on_close;
+ } s;
+ share_mode_entry dummy; /* Needed for alignment. */
+ } u;
+ /* the following two entries are implicit
+ share_mode_entry modes[num_share_mode_entries];
+ char file_name[];
+ */
+};
+
+/*
+ * Check if an external smb_share_mode_entry and an internal share_mode entry match.
+ */
+
+static int share_mode_entry_equal(const struct smb_share_mode_entry *e_entry, const share_mode_entry *entry)
+{
+ return (e_entry->pid == entry->pid &&
+ e_entry->file_id == (uint32_t)entry->share_file_id &&
+ e_entry->open_time.tv_sec == entry->time.tv_sec &&
+ e_entry->open_time.tv_usec == entry->time.tv_usec &&
+ e_entry->share_access == (uint32_t)entry->share_access &&
+ e_entry->access_mask == (uint32_t)entry->access_mask &&
+ e_entry->dev == (uint64_t)entry->dev &&
+ e_entry->ino == (uint64_t)entry->inode);
+}
+
+/*
+ * Create an internal Samba share_mode entry from an external smb_share_mode_entry.
+ */
+
+static void create_share_mode_entry(share_mode_entry *out, const struct smb_share_mode_entry *in)
+{
+ memset(out, '\0', sizeof(share_mode_entry));
+
+ out->pid = in->pid;
+ out->share_file_id = (unsigned long)in->file_id;
+ out->time.tv_sec = in->open_time.tv_sec;
+ out->time.tv_usec = in->open_time.tv_usec;
+ out->share_access = in->share_access;
+ out->access_mask = in->access_mask;
+ out->dev = (SMB_DEV_T)in->dev;
+ out->inode = (SMB_INO_T)in->ino;
+}
+
+/*
+ * Return the current share mode list for an open file.
+ * This uses similar (but simplified) logic to locking/locking.c
+ */
+
+int smb_get_share_mode_entries(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ struct smb_share_mode_entry **pp_list,
+ unsigned char *p_delete_on_close)
+{
+ TDB_DATA db_data;
+ struct smb_share_mode_entry *list = NULL;
+ int num_share_modes = 0;
+ struct locking_data *ld = NULL; /* internal samba db state. */
+ share_mode_entry *shares = NULL;
+ size_t i;
+
+ *pp_list = NULL;
+ *p_delete_on_close = 0;
+
+ db_data = tdb_fetch(db_ctx->smb_tdb, get_locking_key(dev, ino));
+ if (!db_data.dptr) {
+ return 0;
+ }
+
+ ld = (struct locking_data *)db_data.dptr;
+ num_share_modes = ld->u.s.num_share_mode_entries;
+
+ if (!num_share_modes) {
+ free(db_data.dptr);
+ return 0;
+ }
+
+ list = SMB_MALLOC_ARRAY(struct smb_share_mode_entry, num_share_modes);
+ if (!list) {
+ free(db_data.dptr);
+ return -1;
+ }
+
+ memset(list, '\0', num_share_modes * sizeof(struct smb_share_mode_entry));
+
+ shares = (share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
+
+ for (i = 0; i < num_share_modes; i++) {
+ share_mode_entry *share = &shares[i];
+ struct smb_share_mode_entry *sme = &list[i];
+ pid_t pid = share->pid;
+
+ /* Check this process really exists. */
+ if (kill(pid, 0) == -1 && (errno == ESRCH)) {
+ continue; /* No longer exists. */
+ }
+
+ /* Copy into the external list. */
+ sme->dev = (uint64_t)share->dev;
+ sme->ino = (uint64_t)share->inode;
+ sme->share_access = (uint32_t)share->share_access;
+ sme->access_mask = (uint32_t)share->access_mask;
+ sme->open_time.tv_sec = share->time.tv_sec;
+ sme->open_time.tv_usec = share->time.tv_usec;
+ sme->file_id = (uint32_t)share->share_file_id;
+ sme->pid = share->pid;
+ }
+
+ if (i == 0) {
+ free(db_data.dptr);
+ free(list);
+ return 0;
+ }
+
+ *p_delete_on_close = ld->u.s.delete_on_close;
+ *pp_list = list;
+ return i;
+}
+
+/*
+ * Create an entry in the Samba share mode db.
+ */
+
+int smb_create_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ const struct smb_share_mode_entry *new_entry,
+ const char *filename) /* Must be abolute utf8 path. */
+{
+ TDB_DATA db_data;
+ TDB_DATA locking_key = get_locking_key(dev, ino);
+ int orig_num_share_modes = 0;
+ struct locking_data *ld = NULL; /* internal samba db state. */
+ share_mode_entry *shares = NULL;
+ char *new_data_p = NULL;
+ size_t new_data_size = 0;
+
+ db_data = tdb_fetch(db_ctx->smb_tdb, locking_key);
+ if (!db_data.dptr) {
+ /* We must create the entry. */
+ db_data.dptr = SMB_MALLOC(sizeof(struct locking_data) + sizeof(share_mode_entry) + strlen(filename) + 1);
+ if (!db_data.dptr) {
+ return -1;
+ }
+ ld = (struct locking_data *)db_data.dptr;
+ ld->u.s.num_share_mode_entries = 1;
+ ld->u.s.delete_on_close = 0;
+ shares = (share_mode_entry *)db_data.dptr + sizeof(struct locking_data);
+ create_share_mode_entry(shares, new_entry);
+ memcpy(db_data.dptr + sizeof(struct locking_data) + sizeof(share_mode_entry),
+ filename,
+ strlen(filename) + 1);
+
+ db_data.dsize = sizeof(struct locking_data) + sizeof(share_mode_entry) + strlen(filename) + 1;
+ if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_INSERT) == -1) {
+ free(db_data.dptr);
+ return -1;
+ }
+ free(db_data.dptr);
+ return 0;
+ }
+
+ /* Entry exists, we must add a new entry. */
+ new_data_p = SMB_MALLOC(db_data.dsize + sizeof(share_mode_entry));
+ if (!new_data_p) {
+ free(db_data.dptr);
+ return -1;
+ }
+
+ ld = (struct locking_data *)db_data.dptr;
+ orig_num_share_modes = ld->u.s.num_share_mode_entries;
+
+ /* Copy the original data. */
+ memcpy(new_data_p, db_data.dptr, sizeof(struct locking_data) + (orig_num_share_modes*sizeof(share_mode_entry)));
+
+ /* Add in the new share mode */
+ shares = (share_mode_entry *)(db_data.dptr + sizeof(struct locking_data) + (orig_num_share_modes*sizeof(share_mode_entry)));
+ create_share_mode_entry(shares, new_entry);
+
+ ld = (struct locking_data *)new_data_p;
+ ld->u.s.num_share_mode_entries++;
+
+ /* Append the original filename */
+ memcpy(new_data_p + sizeof(struct locking_data) + (ld->u.s.num_share_mode_entries * sizeof(share_mode_entry)),
+ db_data.dptr + sizeof(struct locking_data) + (orig_num_share_modes * sizeof(share_mode_entry)),
+ db_data.dsize - (sizeof(struct locking_data) + (orig_num_share_modes * sizeof(share_mode_entry))));
+
+ new_data_size = db_data.dsize + sizeof(share_mode_entry);
+
+ free(db_data.dptr);
+
+ db_data.dptr = new_data_p;
+ db_data.dsize = new_data_size;
+
+ if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_REPLACE) == -1) {
+ free(db_data.dptr);
+ return -1;
+ }
+ free(db_data.dptr);
+ return 0;
+}
+
+int smb_delete_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ const struct smb_share_mode_entry *del_entry)
+{
+ TDB_DATA db_data;
+ TDB_DATA locking_key = get_locking_key(dev, ino);
+ int orig_num_share_modes = 0;
+ struct locking_data *ld = NULL; /* internal samba db state. */
+ share_mode_entry *shares = NULL;
+ char *new_data_p = NULL;
+ size_t filename_size = 0;
+ size_t i;
+
+ db_data = tdb_fetch(db_ctx->smb_tdb, locking_key);
+ if (!db_data.dptr) {
+ return -1; /* Error - missing entry ! */
+ }
+
+ ld = (struct locking_data *)db_data.dptr;
+ orig_num_share_modes = ld->u.s.num_share_mode_entries;
+ shares = (share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
+
+ if (orig_num_share_modes == 1) {
+ /* Only one entry - better be ours... */
+ if (!share_mode_entry_equal(del_entry, shares)) {
+ /* Error ! We can't delete someone else's entry ! */
+ free(db_data.dptr);
+ return -1;
+ }
+ /* It's ours - just remove the entire record. */
+ free(db_data.dptr);
+ return tdb_delete(db_ctx->smb_tdb, locking_key);
+ }
+
+ /* More than one - allocate a new record minus the one we'll delete. */
+ new_data_p = SMB_MALLOC(db_data.dsize - sizeof(share_mode_entry));
+ if (!new_data_p) {
+ free(db_data.dptr);
+ return -1;
+ }
+
+ /* Copy the header. */
+ memcpy(new_data_p, db_data.dptr, sizeof(struct locking_data));
+
+ for (i = 0; i < orig_num_share_modes; i++) {
+ share_mode_entry *share = &shares[i];
+ pid_t pid = share->pid;
+
+ /* Check this process really exists. */
+ if (kill(pid, 0) == -1 && (errno == ESRCH)) {
+ continue; /* No longer exists. */
+ }
+
+ if (share_mode_entry_equal(del_entry, share)) {
+ continue; /* This is our delete taget. */
+ }
+
+ memcpy(new_data_p + sizeof(struct locking_data) + (i*sizeof(share_mode_entry)),
+ share, sizeof(share_mode_entry) );
+ }
+
+ if (i == 0) {
+ /* None left after pruning. Delete record. */
+ free(db_data.dptr);
+ free(new_data_p);
+ return tdb_delete(db_ctx->smb_tdb, locking_key);
+ }
+
+ /* Copy the terminating filename. */
+ filename_size = db_data.dsize - ( sizeof(struct locking_data) + (orig_num_share_modes * sizeof(share_mode_entry)));
+
+ memcpy(new_data_p + sizeof(struct locking_data) + (i*sizeof(share_mode_entry)),
+ db_data.dptr + sizeof(struct locking_data) + (orig_num_share_modes * sizeof(share_mode_entry)),
+ filename_size);
+
+ free(db_data.dptr);
+
+ db_data.dptr = new_data_p;
+
+ /* Re-save smaller record. */
+ ld = (struct locking_data *)db_data.dptr;
+ ld->u.s.num_share_mode_entries = i;
+
+ db_data.dsize = sizeof(struct locking_data) + (i*sizeof(share_mode_entry)) + filename_size;
+
+ if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_REPLACE) == -1) {
+ free(db_data.dptr);
+ return -1;
+ }
+ free(db_data.dptr);
+ return 0;
+}
+
+int smb_change_share_mode_entry(struct smbdb_ctx *db_ctx,
+ uint64_t dev,
+ uint64_t ino,
+ const struct smb_share_mode_entry *set_entry,
+ const struct smb_share_mode_entry *new_entry)
+{
+ TDB_DATA db_data;
+ TDB_DATA locking_key = get_locking_key(dev, ino);
+ int num_share_modes = 0;
+ struct locking_data *ld = NULL; /* internal samba db state. */
+ share_mode_entry *shares = NULL;
+ size_t i;
+ int found_entry = 0;
+
+ db_data = tdb_fetch(db_ctx->smb_tdb, locking_key);
+ if (!db_data.dptr) {
+ return -1; /* Error - missing entry ! */
+ }
+
+ ld = (struct locking_data *)db_data.dptr;
+ num_share_modes = ld->u.s.num_share_mode_entries;
+ shares = (share_mode_entry *)(db_data.dptr + sizeof(struct locking_data));
+
+ for (i = 0; i < num_share_modes; i++) {
+ share_mode_entry *share = &shares[i];
+ pid_t pid = share->pid;
+
+ /* Check this process really exists. */
+ if (kill(pid, 0) == -1 && (errno == ESRCH)) {
+ continue; /* No longer exists. */
+ }
+
+ if (share_mode_entry_equal(set_entry, share)) {
+ create_share_mode_entry(share, new_entry);
+ break;
+ }
+ }
+
+ if (!found_entry) {
+ free(db_data.dptr);
+ return -1;
+ }
+
+ /* Save modified data. */
+ if (tdb_store(db_ctx->smb_tdb, locking_key, db_data, TDB_REPLACE) == -1) {
+ free(db_data.dptr);
+ return -1;
+ }
+ free(db_data.dptr);
+ return 0;
+}