sin/samba-mirror
1
0
Fork 0
mirror of https://github.com/samba-team/samba.git synced 2025-01-12 09:18:10 +03:00
Code

r10042: Add in external LGPL library for accessing the share mode db. Allow

Browse Source 
others to examine & test. May not end up here eventually...
Jeremy.
This commit is contained in:
Jeremy Allison 2005-09-05 20:36:07 +00:00 committed by Gerald (Jerry) Carter
parent d7ff5075d6
commit 7cc70ae633
4 changed files with 627 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
source/Makefile.in
View File

@ -97,8 +97,12 @@ LIBSMBCLIENT=bin/libsmbclient.a @LIBSMBCLIENT_SHARED@
LIBSMBCLIENT_MAJOR=0 LIBSMBCLIENT_MAJOR=0
LIBSMBCLIENT_MINOR=1 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 = FLAGS2 =
FLAGS3 = FLAGS3 =
FLAGS4 = 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@ \ EVERYTHING_PROGS = bin/debug2html@EXEEXT@ bin/smbfilter@EXEEXT@ bin/talloctort@EXEEXT@ \
bin/log2pcap@EXEEXT@ bin/log2pcap@EXEEXT@
SHLIBS = @SHLIB_PROGS@ @LIBSMBCLIENT@ SHLIBS = @SHLIB_PROGS@ @LIBSMBCLIENT@ @LIBSMBSHAREMODES@
SCRIPTS = $(srcdir)/script/smbtar $(builddir)/script/findsmb 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) \ $(LIBMSRPC_OBJ) $(RPC_PARSE_OBJ) \
$(SECRETS_OBJ) $(PASSDB_OBJ) $(SMBLDAP_OBJ) $(GROUPDB_OBJ) $(SECRETS_OBJ) $(PASSDB_OBJ) $(SMBLDAP_OBJ) $(GROUPDB_OBJ)
LIBSMBSHAREMODES_OBJ = libsmb/smb_share_modes.o tdb/tdb.o
CAC_OBJ = $(LIBSMBCLIENT_OBJ) \ CAC_OBJ = $(LIBSMBCLIENT_OBJ) \
libmsrpc/libmsrpc.o libmsrpc/libmsrpc_internal.o \ libmsrpc/libmsrpc.o libmsrpc/libmsrpc_internal.o \
libmsrpc/cac_lsarpc.o libmsrpc/cac_winreg.o libmsrpc/cac_samr.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@) PICOBJS = $(SMBWRAPPER_OBJ:.o=.@PICSUFFIX@)
LIBSMBCLIENT_PICOBJS = $(LIBSMBCLIENT_OBJ:.o=.@PICSUFFIX@) LIBSMBCLIENT_PICOBJS = $(LIBSMBCLIENT_OBJ:.o=.@PICSUFFIX@)
LIBSMBSHAREMODES_PICOBJS = $(LIBSMBSHAREMODES_OBJ:.o=.@PICSUFFIX@)
CAC_PICOBJS = $(CAC_OBJ:.o=.@PICSUFFIX@) CAC_PICOBJS = $(CAC_OBJ:.o=.@PICSUFFIX@)
@ -1016,6 +1023,15 @@ bin/libsmbclient.a: $(LIBSMBCLIENT_PICOBJS)
@echo Linking libsmbclient non-shared library $@ @echo Linking libsmbclient non-shared library $@
@-$(AR) -rc $@ $(LIBSMBCLIENT_PICOBJS) @-$(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) bin/libmsrpc.@SHLIBEXT@: $(CAC_PICOBJS)
@echo Linking libmsrpc shared library $@ @echo Linking libmsrpc shared library $@
@ -1041,6 +1057,7 @@ bin/libbigballofmud.@SHLIBEXT@: $(LIBBIGBALLOFMUD_PICOBJS)
# library. # library.
libsmbclient: $(LIBSMBCLIENT) libsmbclient: $(LIBSMBCLIENT)
libsmbsharemodes: $(LIBSMBSHAREMODES)
bin/librpc_lsarpc.@SHLIBEXT@: $(RPC_LSA_OBJ) bin/librpc_lsarpc.@SHLIBEXT@: $(RPC_LSA_OBJ)
@echo "Linking $@" @echo "Linking $@"
@ -1461,7 +1478,7 @@ TOPFILES=dynconfig.o dynconfig.@PICSUFFIX@
clean: delheaders python_clean clean: delheaders python_clean
-rm -f core */*~ *~ */*.o */*.@PICSUFFIX@ */*.@SHLIBEXT@ \ -rm -f core */*~ *~ */*.o */*.@PICSUFFIX@ */*.@SHLIBEXT@ \
$(TOPFILES) $(BIN_PROGS) $(SBIN_PROGS) $(MODULES) $(TORTURE_PROGS) \ $(TOPFILES) $(BIN_PROGS) $(SBIN_PROGS) $(MODULES) $(TORTURE_PROGS) \
$(LIBSMBCLIENT) $(EVERYTHING_PROGS) .headers.stamp $(LIBSMBCLIENT) $(LIBSMBSHAREMODES) $(EVERYTHING_PROGS) .headers.stamp
-rm -rf t_dir -rm -rf t_dir
# Making this target will just make sure that the prototype files # Making this target will just make sure that the prototype files

52
source/configure.in
View File

@ -219,6 +219,8 @@ AC_SUBST(INSTALLCLIENTCMD_SH)
AC_SUBST(INSTALLCLIENTCMD_A) AC_SUBST(INSTALLCLIENTCMD_A)
AC_SUBST(LIBSMBCLIENT_SHARED) AC_SUBST(LIBSMBCLIENT_SHARED)
AC_SUBST(LIBSMBCLIENT) AC_SUBST(LIBSMBCLIENT)
AC_SUBST(LIBSMBSHAREMODES_SHARED)
AC_SUBST(LIBSMBSHAREMODES)
AC_SUBST(PRINT_LIBS) AC_SUBST(PRINT_LIBS)
AC_SUBST(AUTH_LIBS) AC_SUBST(AUTH_LIBS)
AC_SUBST(ACL_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 # these tests are taken from the GNU fileutils package
AC_CHECKING(how to get filesystem space usage) AC_CHECKING(how to get filesystem space usage)

103
source/include/smb_share_modes.h Normal file
View File

@ -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

452
source/libsmb/smb_share_modes.c Normal file
View File

@ -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;
}