source3/smbd/globals.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    smbd globals
   4    Copyright (C) Stefan Metzmacher 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "smbd/smbd.h"
  22 #include "smbd/globals.h"
  23 #include "lib/smbd_shim.h"
  24 #include "memcache.h"
  25 #include "messages.h"
  26 #include "tdb_compat.h"
  27
  28 #if defined(HAVE_AIO)
  29 struct aio_extra *aio_list_head = NULL;
  30 struct tevent_signal *aio_signal_event = NULL;
  31 int aio_pending_size = 0;
  32 int outstanding_aio_calls = 0;
  33 #endif
  34
  35 #ifdef USE_DMAPI
  36 struct smbd_dmapi_context *dmapi_ctx = NULL;
  37 #endif
  38
  39
  40 bool dfree_broken = false;
  41
  42 /* how many write cache buffers have been allocated */
  43 unsigned int allocated_write_caches = 0;
  44
  45 const struct mangle_fns *mangle_fns = NULL;
  46
  47 unsigned char *chartest = NULL;
  48 TDB_CONTEXT *tdb_mangled_cache = NULL;
  49
  50 /*
  51   this determines how many characters are used from the original filename
  52   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  53   The largest possible value is 6.
  54 */
  55 unsigned mangle_prefix = 0;
  56
  57 bool logged_ioctl_message = false;
  58
  59 time_t last_smb_conf_reload_time = 0;
  60 time_t last_printer_reload_time = 0;
  61 pid_t background_lpq_updater_pid = -1;
  62
  63 /****************************************************************************
  64  structure to hold a linked list of queued messages.
  65  for processing.
  66 ****************************************************************************/
  67 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  68
  69 struct smb_trans_enc_state *partial_srv_trans_enc_ctx = NULL;
  70 struct smb_trans_enc_state *srv_trans_enc_ctx = NULL;
  71
  72 /* A stack of security contexts.  We include the current context as being
  73    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  74 struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  75 int sec_ctx_stack_ndx = 0;
  76 bool become_uid_done = false;
  77 bool become_gid_done = false;
  78
  79 connection_struct *last_conn = NULL;
  80 uint16_t last_flags = 0;
  81
  82 uint32_t global_client_caps = 0;
  83
  84 uint16_t fnf_handle = 257;
  85
  86 /* A stack of current_user connection contexts. */
  87 struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
  88 int conn_ctx_stack_ndx = 0;
  89
  90 struct vfs_init_function_entry *backends = NULL;
  91 char *sparse_buf = NULL;
  92 char *LastDir = NULL;
  93
  94 struct smbd_parent_context *am_parent = NULL;
  95 struct memcache *smbd_memcache_ctx = NULL;
  96 bool exit_firsttime = true;
  97
  98 struct smbXsrv_connection *global_smbXsrv_connection = NULL;
  99
 100 struct memcache *smbd_memcache(void)
 101 {
 102         if (!smbd_memcache_ctx) {
 103                 /*
 104                  * Note we MUST use the NULL context here, not the
 105                  * autofree context, to avoid side effects in forked
 106                  * children exiting.
 107                  */
 108                 smbd_memcache_ctx = memcache_init(NULL,
 109                                                   lp_max_stat_cache_size()*1024);
 110         }
 111         if (!smbd_memcache_ctx) {
 112                 smb_panic("Could not init smbd memcache");
 113         }
 114
 115         return smbd_memcache_ctx;
 116 }
 117
 118 static const struct smbd_shim smbd_shim_fns =
 119 {
 120         .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
 121         .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
 122         .change_to_root_user = smbd_change_to_root_user,
 123
 124         .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
 125         .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
 126
 127         .become_root = smbd_become_root,
 128         .unbecome_root = smbd_unbecome_root
 129 };
 130
 131 void smbd_init_globals(void)
 132 {
 133         set_smbd_shim(&smbd_shim_fns);
 134
 135         ZERO_STRUCT(conn_ctx_stack);
 136
 137         ZERO_STRUCT(sec_ctx_stack);
 138 }