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 int aio_pending_size = 100;     /* tevent supports 100 signals SA_SIGINFO */
  29 int outstanding_aio_calls = 0;
  30
  31 #ifdef USE_DMAPI
  32 struct smbd_dmapi_context *dmapi_ctx = NULL;
  33 #endif
  34
  35
  36 bool dfree_broken = false;
  37
  38 /* how many write cache buffers have been allocated */
  39 unsigned int allocated_write_caches = 0;
  40
  41 const struct mangle_fns *mangle_fns = NULL;
  42
  43 unsigned char *chartest = NULL;
  44 TDB_CONTEXT *tdb_mangled_cache = NULL;
  45
  46 /*
  47   this determines how many characters are used from the original filename
  48   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  49   The largest possible value is 6.
  50 */
  51 unsigned mangle_prefix = 0;
  52
  53 bool logged_ioctl_message = false;
  54
  55 time_t last_smb_conf_reload_time = 0;
  56 time_t last_printer_reload_time = 0;
  57 pid_t background_lpq_updater_pid = -1;
  58
  59 /****************************************************************************
  60  structure to hold a linked list of queued messages.
  61  for processing.
  62 ****************************************************************************/
  63 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  64
  65 struct smb_trans_enc_state *partial_srv_trans_enc_ctx = NULL;
  66 struct smb_trans_enc_state *srv_trans_enc_ctx = NULL;
  67
  68 /* A stack of security contexts.  We include the current context as being
  69    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  70 struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  71 int sec_ctx_stack_ndx = 0;
  72 bool become_uid_done = false;
  73 bool become_gid_done = false;
  74
  75 connection_struct *last_conn = NULL;
  76 uint16_t last_flags = 0;
  77
  78 uint32_t global_client_caps = 0;
  79
  80 uint16_t fnf_handle = 257;
  81
  82 /* A stack of current_user connection contexts. */
  83 struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
  84 int conn_ctx_stack_ndx = 0;
  85
  86 struct vfs_init_function_entry *backends = NULL;
  87 char *sparse_buf = NULL;
  88 char *LastDir = NULL;
  89
  90 struct smbd_parent_context *am_parent = NULL;
  91 struct memcache *smbd_memcache_ctx = NULL;
  92 bool exit_firsttime = true;
  93
  94 struct smbXsrv_connection *global_smbXsrv_connection = NULL;
  95
  96 struct memcache *smbd_memcache(void)
  97 {
  98         if (!smbd_memcache_ctx) {
  99                 /*
 100                  * Note we MUST use the NULL context here, not the
 101                  * autofree context, to avoid side effects in forked
 102                  * children exiting.
 103                  */
 104                 smbd_memcache_ctx = memcache_init(NULL,
 105                                                   lp_max_stat_cache_size()*1024);
 106         }
 107         if (!smbd_memcache_ctx) {
 108                 smb_panic("Could not init smbd memcache");
 109         }
 110
 111         return smbd_memcache_ctx;
 112 }
 113
 114 static const struct smbd_shim smbd_shim_fns =
 115 {
 116         .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
 117         .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
 118         .change_to_root_user = smbd_change_to_root_user,
 119
 120         .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
 121         .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
 122
 123         .become_root = smbd_become_root,
 124         .unbecome_root = smbd_unbecome_root
 125 };
 126
 127 void smbd_init_globals(void)
 128 {
 129         set_smbd_shim(&smbd_shim_fns);
 130
 131         ZERO_STRUCT(conn_ctx_stack);
 132
 133         ZERO_STRUCT(sec_ctx_stack);
 134 }