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(WITH_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 struct msg_state *smbd_msg_state = NULL;
  58
  59 bool logged_ioctl_message = false;
  60
  61 time_t last_smb_conf_reload_time = 0;
  62 time_t last_printer_reload_time = 0;
  63 pid_t background_lpq_updater_pid = -1;
  64
  65 /****************************************************************************
  66  structure to hold a linked list of queued messages.
  67  for processing.
  68 ****************************************************************************/
  69 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  70
  71 struct smb_trans_enc_state *partial_srv_trans_enc_ctx = NULL;
  72 struct smb_trans_enc_state *srv_trans_enc_ctx = NULL;
  73
  74 /* A stack of security contexts.  We include the current context as being
  75    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  76 struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  77 int sec_ctx_stack_ndx = 0;
  78 bool become_uid_done = false;
  79 bool become_gid_done = false;
  80
  81 connection_struct *last_conn = NULL;
  82 uint16_t last_flags = 0;
  83
  84 uint32_t global_client_caps = 0;
  85
  86 uint16_t fnf_handle = 257;
  87
  88 /* A stack of current_user connection contexts. */
  89 struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
  90 int conn_ctx_stack_ndx = 0;
  91
  92 struct vfs_init_function_entry *backends = NULL;
  93 char *sparse_buf = NULL;
  94 char *LastDir = NULL;
  95
  96 /* Current number of oplocks we have outstanding. */
  97 int32_t exclusive_oplocks_open = 0;
  98 int32_t level_II_oplocks_open = 0;
  99 struct kernel_oplocks *koplocks = NULL;
 100
 101 struct smbd_parent_context *am_parent = NULL;
 102 struct memcache *smbd_memcache_ctx = NULL;
 103 bool exit_firsttime = true;
 104
 105 struct smbd_server_connection *smbd_server_conn = NULL;
 106
 107 struct memcache *smbd_memcache(void)
 108 {
 109         if (!smbd_memcache_ctx) {
 110                 /*
 111                  * Note we MUST use the NULL context here, not the
 112                  * autofree context, to avoid side effects in forked
 113                  * children exiting.
 114                  */
 115                 smbd_memcache_ctx = memcache_init(NULL,
 116                                                   lp_max_stat_cache_size()*1024);
 117         }
 118         if (!smbd_memcache_ctx) {
 119                 smb_panic("Could not init smbd memcache");
 120         }
 121
 122         return smbd_memcache_ctx;
 123 }
 124
 125 static const struct smbd_shim smbd_shim_fns =
 126 {
 127         .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
 128         .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
 129         .change_to_root_user = smbd_change_to_root_user,
 130
 131         .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
 132         .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
 133
 134         .become_root = smbd_become_root,
 135         .unbecome_root = smbd_unbecome_root
 136 };
 137
 138 void smbd_init_globals(void)
 139 {
 140         set_smbd_shim(&smbd_shim_fns);
 141
 142         ZERO_STRUCT(conn_ctx_stack);
 143
 144         ZERO_STRUCT(sec_ctx_stack);
 145
 146         smbd_server_conn = talloc_zero(server_event_context(), struct smbd_server_connection);
 147         if (!smbd_server_conn) {
 148                 exit_server("failed to create smbd_server_connection");
 149         }
 150
 151         smbd_server_conn->ev_ctx = server_event_context();
 152         smbd_server_conn->smb1.echo_handler.trusted_fd = -1;
 153         smbd_server_conn->smb1.echo_handler.socket_lock_fd = -1;
 154 }