minix/fs/ext2/main.c

   1 #include "fs.h"
   2 #include "buf.h"
   3 #include "inode.h"
   4 #include <string.h>
   5 #include <minix/optset.h>
   6
   7 /* SEF functions and variables. */
   8 static void sef_local_startup(void);
   9 static int sef_cb_init_fresh(int type, sef_init_info_t *info);
  10 static void sef_cb_signal_handler(int signo);
  11
  12 EXTERN int env_argc;
  13 EXTERN char **env_argv;
  14
  15 static struct optset optset_table[] = {
  16   { "sb",               OPT_INT,    &opt.block_with_super,      0       },
  17   { "orlov",            OPT_BOOL,   &opt.use_orlov,             TRUE    },
  18   { "oldalloc",         OPT_BOOL,   &opt.use_orlov,             FALSE   },
  19   { "mfsalloc",         OPT_BOOL,   &opt.mfsalloc,              TRUE    },
  20   { "reserved",         OPT_BOOL,   &opt.use_reserved_blocks,   TRUE    },
  21   { "prealloc",         OPT_BOOL,   &opt.use_prealloc,          TRUE    },
  22   { "noprealloc",       OPT_BOOL,   &opt.use_prealloc,          FALSE   },
  23   { NULL,               0,          NULL,                       0       }
  24 };
  25
  26 /*===========================================================================*
  27  *                              main                                         *
  28  *===========================================================================*/
  29 int main(int argc, char *argv[])
  30 {
  31 /* This is the main routine of this service. */
  32   unsigned short test_endian = 1;
  33
  34   /* SEF local startup. */
  35   env_setargs(argc, argv);
  36   sef_local_startup();
  37
  38   le_CPU = (*(unsigned char *) &test_endian == 0 ? 0 : 1);
  39
  40   /* Server isn't tested on big endian CPU */
  41   ASSERT(le_CPU == 1);
  42
  43   /* The fsdriver library does the actual work here. */
  44   fsdriver_task(&ext2_table);
  45
  46   return 0;
  47 }
  48
  49 /*===========================================================================*
  50  *                             sef_local_startup                             *
  51  *===========================================================================*/
  52 static void sef_local_startup()
  53 {
  54   /* Register init callbacks. */
  55   sef_setcb_init_fresh(sef_cb_init_fresh);
  56
  57   /* Register signal callbacks. */
  58   sef_setcb_signal_handler(sef_cb_signal_handler);
  59
  60   /* Let SEF perform startup. */
  61   sef_startup();
  62 }
  63
  64 /*===========================================================================*
  65  *                          sef_cb_init_fresh                                *
  66  *===========================================================================*/
  67 static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
  68 {
  69 /* Initialize the Minix file server. */
  70   int i;
  71
  72   /* Defaults */
  73   opt.use_orlov = TRUE;
  74   opt.mfsalloc = FALSE;
  75   opt.use_reserved_blocks = FALSE;
  76   opt.block_with_super = 0;
  77   opt.use_prealloc = FALSE;
  78
  79   /* If we have been given an options string, parse options from there. */
  80   for (i = 1; i < env_argc - 1; i++)
  81         if (!strcmp(env_argv[i], "-o"))
  82                 optset_parse(optset_table, env_argv[++i]);
  83
  84   lmfs_may_use_vmcache(1);
  85
  86   /* Init inode table */
  87   for (i = 0; i < NR_INODES; ++i) {
  88         inode[i].i_count = 0;
  89         cch[i] = 0;
  90   }
  91
  92   init_inode_cache();
  93
  94   /* just a small number before we find out the block size at mount time */
  95   lmfs_buf_pool(10);
  96
  97   return(OK);
  98 }
  99
 100 /*===========================================================================*
 101  *                         sef_cb_signal_handler                             *
 102  *===========================================================================*/
 103 static void sef_cb_signal_handler(int signo)
 104 {
 105   /* Only check for termination signal, ignore anything else. */
 106   if (signo != SIGTERM) return;
 107
 108   fs_sync();
 109
 110   fsdriver_terminate();
 111 }