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 "memcache.h"
  24 #include "messages.h"
  25 #include "tdb_compat.h"
  26
  27 #if defined(WITH_AIO)
  28 struct aio_extra *aio_list_head = NULL;
  29 struct tevent_signal *aio_signal_event = NULL;
  30 int aio_pending_size = 0;
  31 int outstanding_aio_calls = 0;
  32 #endif
  33
  34 #ifdef USE_DMAPI
  35 struct smbd_dmapi_context *dmapi_ctx = NULL;
  36 #endif
  37
  38
  39 bool dfree_broken = false;
  40
  41 /* how many write cache buffers have been allocated */
  42 unsigned int allocated_write_caches = 0;
  43
  44 const struct mangle_fns *mangle_fns = NULL;
  45
  46 unsigned char *chartest = NULL;
  47 TDB_CONTEXT *tdb_mangled_cache = NULL;
  48
  49 /*
  50   this determines how many characters are used from the original filename
  51   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  52   The largest possible value is 6.
  53 */
  54 unsigned mangle_prefix = 0;
  55
  56 struct msg_state *smbd_msg_state = NULL;
  57
  58 bool logged_ioctl_message = false;
  59
  60 time_t last_smb_conf_reload_time = 0;
  61 time_t last_printer_reload_time = 0;
  62 /****************************************************************************
  63  structure to hold a linked list of queued messages.
  64  for processing.
  65 ****************************************************************************/
  66 struct pending_message_list *deferred_open_queue = NULL;
  67 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  68
  69 struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx = NULL;
  70 struct smb_srv_trans_enc_ctx *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 /* Current number of oplocks we have outstanding. */
  95 int32_t exclusive_oplocks_open = 0;
  96 int32_t level_II_oplocks_open = 0;
  97 struct kernel_oplocks *koplocks = NULL;
  98
  99 int am_parent = 1;
 100 struct memcache *smbd_memcache_ctx = NULL;
 101 bool exit_firsttime = true;
 102 struct child_pid *children = 0;
 103 int num_children = 0;
 104
 105 struct smbd_server_connection *smbd_server_conn = NULL;
 106
 107 struct smbd_server_connection *msg_ctx_to_sconn(struct messaging_context *msg_ctx)
 108 {
 109         struct server_id my_id, msg_id;
 110
 111         my_id = messaging_server_id(smbd_server_conn->msg_ctx);
 112         msg_id = messaging_server_id(msg_ctx);
 113
 114         if (!procid_equal(&my_id, &msg_id)) {
 115                 return NULL;
 116         }
 117         return smbd_server_conn;
 118 }
 119
 120 struct messaging_context *smbd_messaging_context(void)
 121 {
 122         struct messaging_context *msg_ctx = server_messaging_context();
 123         if (likely(msg_ctx != NULL)) {
 124                 return msg_ctx;
 125         }
 126         smb_panic("Could not init smbd's messaging context.\n");
 127         return NULL;
 128 }
 129
 130 struct memcache *smbd_memcache(void)
 131 {
 132         if (!smbd_memcache_ctx) {
 133                 /*
 134                  * Note we MUST use the NULL context here, not the
 135                  * autofree context, to avoid side effects in forked
 136                  * children exiting.
 137                  */
 138                 smbd_memcache_ctx = memcache_init(NULL,
 139                                                   lp_max_stat_cache_size()*1024);
 140         }
 141         if (!smbd_memcache_ctx) {
 142                 smb_panic("Could not init smbd memcache");
 143         }
 144
 145         return smbd_memcache_ctx;
 146 }
 147
 148
 149 void smbd_init_globals(void)
 150 {
 151         ZERO_STRUCT(conn_ctx_stack);
 152
 153         ZERO_STRUCT(sec_ctx_stack);
 154
 155         smbd_server_conn = talloc_zero(server_event_context(), struct smbd_server_connection);
 156         if (!smbd_server_conn) {
 157                 exit_server("failed to create smbd_server_connection");
 158         }
 159
 160         smbd_server_conn->smb1.echo_handler.trusted_fd = -1;
 161         smbd_server_conn->smb1.echo_handler.socket_lock_fd = -1;
 162 }
 163
 164 void smbd_set_server_fd(int fd)
 165 {
 166         struct smbd_server_connection *sconn = smbd_server_conn;
 167         char addr[INET6_ADDRSTRLEN];
 168         const char *name;
 169
 170         sconn->sock = fd;
 171
 172         /*
 173          * Initialize sconn->client_id: If we can't find the client's
 174          * name, default to its address.
 175          */
 176
 177         client_addr(fd, sconn->client_id.addr, sizeof(sconn->client_id.addr));
 178
 179         name = client_name(sconn->sock);
 180         if (strcmp(name, "UNKNOWN") != 0) {
 181                 name = talloc_strdup(sconn, name);
 182         } else {
 183                 name = NULL;
 184         }
 185         sconn->client_id.name =
 186                 (name != NULL) ? name : sconn->client_id.addr;
 187
 188         sub_set_socket_ids(sconn->client_id.addr, sconn->client_id.name,
 189                            client_socket_addr(sconn->sock, addr,
 190                                               sizeof(addr)));
 191 }