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/globals.h"
  22 #include "memcache.h"
  23
  24 #if defined(WITH_AIO)
  25 struct aio_extra *aio_list_head = NULL;
  26 struct tevent_signal *aio_signal_event = NULL;
  27 int aio_pending_size = 0;
  28 int outstanding_aio_calls = 0;
  29 #endif
  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 struct msg_state *smbd_msg_state = NULL;
  54
  55 bool logged_ioctl_message = false;
  56
  57 time_t last_smb_conf_reload_time = 0;
  58 time_t last_printer_reload_time = 0;
  59 /****************************************************************************
  60  structure to hold a linked list of queued messages.
  61  for processing.
  62 ****************************************************************************/
  63 struct pending_message_list *deferred_open_queue = NULL;
  64 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  65
  66 struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx = NULL;
  67 struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx = NULL;
  68
  69 /* A stack of security contexts.  We include the current context as being
  70    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  71 struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  72 int sec_ctx_stack_ndx = 0;
  73 bool become_uid_done = false;
  74 bool become_gid_done = false;
  75
  76 connection_struct *last_conn = NULL;
  77 uint16_t last_flags = 0;
  78
  79 uint32_t global_client_caps = 0;
  80
  81 uint16_t fnf_handle = 257;
  82
  83 /* A stack of current_user connection contexts. */
  84 struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
  85 int conn_ctx_stack_ndx = 0;
  86
  87 struct vfs_init_function_entry *backends = NULL;
  88 char *sparse_buf = NULL;
  89 char *LastDir = NULL;
  90
  91 /* Current number of oplocks we have outstanding. */
  92 int32_t exclusive_oplocks_open = 0;
  93 int32_t level_II_oplocks_open = 0;
  94 struct kernel_oplocks *koplocks = NULL;
  95
  96 int am_parent = 1;
  97 struct memcache *smbd_memcache_ctx = NULL;
  98 bool exit_firsttime = true;
  99 struct child_pid *children = 0;
 100 int num_children = 0;
 101
 102 struct smbd_server_connection *smbd_server_conn = NULL;
 103
 104 struct smbd_server_connection *msg_ctx_to_sconn(struct messaging_context *msg_ctx)
 105 {
 106         struct server_id my_id, msg_id;
 107
 108         my_id = messaging_server_id(smbd_server_conn->msg_ctx);
 109         msg_id = messaging_server_id(msg_ctx);
 110
 111         if (!procid_equal(&my_id, &msg_id)) {
 112                 return NULL;
 113         }
 114         return smbd_server_conn;
 115 }
 116
 117 struct messaging_context *smbd_messaging_context(void)
 118 {
 119         struct messaging_context *msg_ctx = server_messaging_context();
 120         if (likely(msg_ctx != NULL)) {
 121                 return msg_ctx;
 122         }
 123         smb_panic("Could not init smbd's messaging context.\n");
 124 }
 125
 126 struct memcache *smbd_memcache(void)
 127 {
 128         if (!smbd_memcache_ctx) {
 129                 /*
 130                  * Note we MUST use the NULL context here, not the
 131                  * autofree context, to avoid side effects in forked
 132                  * children exiting.
 133                  */
 134                 smbd_memcache_ctx = memcache_init(NULL,
 135                                                   lp_max_stat_cache_size()*1024);
 136         }
 137         if (!smbd_memcache_ctx) {
 138                 smb_panic("Could not init smbd memcache");
 139         }
 140
 141         return smbd_memcache_ctx;
 142 }
 143
 144
 145 void smbd_init_globals(void)
 146 {
 147         ZERO_STRUCT(conn_ctx_stack);
 148
 149         ZERO_STRUCT(sec_ctx_stack);
 150
 151         smbd_server_conn = talloc_zero(smbd_event_context(), struct smbd_server_connection);
 152         if (!smbd_server_conn) {
 153                 exit_server("failed to create smbd_server_connection");
 154         }
 155
 156         smbd_server_conn->smb1.echo_handler.trusted_fd = -1;
 157         smbd_server_conn->smb1.echo_handler.socket_lock_fd = -1;
 158 }