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
  23 #if defined(WITH_AIO)
  24 struct aio_extra *aio_list_head = NULL;
  25 struct tevent_signal *aio_signal_event = NULL;
  26 int aio_pending_size = 0;
  27 int outstanding_aio_calls = 0;
  28 #endif
  29
  30 #ifdef USE_DMAPI
  31 struct smbd_dmapi_context *dmapi_ctx = NULL;
  32 #endif
  33
  34
  35 bool dfree_broken = false;
  36
  37 /* how many write cache buffers have been allocated */
  38 unsigned int allocated_write_caches = 0;
  39
  40 int real_max_open_files = 0;
  41 struct bitmap *file_bmap = NULL;
  42 files_struct *Files = NULL;
  43 int files_used = 0;
  44 struct fsp_singleton_cache fsp_fi_cache = {
  45         .fsp = NULL,
  46         .id = {
  47                 .devid = 0,
  48                 .inode = 0,
  49                 .extid = 0
  50         }
  51 };
  52 unsigned long file_gen_counter = 0;
  53 int first_file = 0;
  54
  55 const struct mangle_fns *mangle_fns = NULL;
  56
  57 unsigned char *chartest = NULL;
  58 TDB_CONTEXT *tdb_mangled_cache = NULL;
  59
  60 /* these tables are used to provide fast tests for characters */
  61 unsigned char char_flags[256];
  62 /*
  63   this determines how many characters are used from the original filename
  64   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  65   The largest possible value is 6.
  66 */
  67 unsigned mangle_prefix = 0;
  68 unsigned char base_reverse[256];
  69
  70 struct msg_state *smbd_msg_state = NULL;
  71
  72 bool logged_ioctl_message = false;
  73
  74 int trans_num = 0;
  75 pid_t mypid = 0;
  76 time_t last_smb_conf_reload_time = 0;
  77 time_t last_printer_reload_time = 0;
  78 /****************************************************************************
  79  structure to hold a linked list of queued messages.
  80  for processing.
  81 ****************************************************************************/
  82 struct pending_message_list *deferred_open_queue = NULL;
  83 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  84
  85 struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx = NULL;
  86 struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx = NULL;
  87
  88 /* A stack of security contexts.  We include the current context as being
  89    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  90 struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  91 int sec_ctx_stack_ndx = 0;
  92 bool become_uid_done = false;
  93 bool become_gid_done = false;
  94
  95 connection_struct *last_conn = NULL;
  96 uint16_t last_flags = 0;
  97
  98 uint32_t global_client_caps = 0;
  99
 100 uint16_t fnf_handle = 257;
 101
 102 /* A stack of current_user connection contexts. */
 103 struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 104 int conn_ctx_stack_ndx = 0;
 105
 106 struct vfs_init_function_entry *backends = NULL;
 107 char *sparse_buf = NULL;
 108 char *LastDir = NULL;
 109
 110 /* Current number of oplocks we have outstanding. */
 111 int32_t exclusive_oplocks_open = 0;
 112 int32_t level_II_oplocks_open = 0;
 113 struct kernel_oplocks *koplocks = NULL;
 114
 115 int am_parent = 1;
 116 int server_fd = -1;
 117 struct memcache *smbd_memcache_ctx = NULL;
 118 bool exit_firsttime = true;
 119 struct child_pid *children = 0;
 120 int num_children = 0;
 121
 122 struct smbd_server_connection *smbd_server_conn = NULL;
 123
 124 struct messaging_context *smbd_messaging_context(void)
 125 {
 126         return server_messaging_context();
 127 }
 128
 129 struct memcache *smbd_memcache(void)
 130 {
 131         if (!smbd_memcache_ctx) {
 132                 /*
 133                  * Note we MUST use the NULL context here, not the
 134                  * autofree context, to avoid side effects in forked
 135                  * children exiting.
 136                  */
 137                 smbd_memcache_ctx = memcache_init(NULL,
 138                                                   lp_max_stat_cache_size()*1024);
 139         }
 140         if (!smbd_memcache_ctx) {
 141                 smb_panic("Could not init smbd memcache");
 142         }
 143
 144         return smbd_memcache_ctx;
 145 }
 146
 147
 148 void smbd_init_globals(void)
 149 {
 150         ZERO_STRUCT(char_flags);
 151         ZERO_STRUCT(base_reverse);
 152
 153         ZERO_STRUCT(conn_ctx_stack);
 154
 155         ZERO_STRUCT(sec_ctx_stack);
 156
 157         smbd_server_conn = talloc_zero(smbd_event_context(), struct smbd_server_connection);
 158         if (!smbd_server_conn) {
 159                 exit_server("failed to create smbd_server_connection");
 160         }
 161
 162         smbd_server_conn->smb1.echo_handler.trusted_fd = -1;
 163         smbd_server_conn->smb1.echo_handler.socket_lock_fd = -1;
 164 }