minix/lib/libvtreefs/mount.c

   1 /* VTreeFS - mount.c - mounting and unmounting */
   2
   3 #include "inc.h"
   4 #include <minix/vfsif.h>
   5
   6 /*
   7  * Mount the file system.  Obtain the root inode and send back its details.
   8  */
   9 int
  10 fs_mount(dev_t __unused dev, unsigned int flags,
  11         struct fsdriver_node * root_node, unsigned int * res_flags)
  12 {
  13         struct inode *root;
  14
  15         /* VTreeFS must not be mounted as a root file system. */
  16         if (flags & REQ_ISROOT)
  17                 return EINVAL;
  18
  19         /* Get the root inode and increase its reference count. */
  20         root = get_root_inode();
  21         ref_inode(root);
  22
  23         /* The system is now mounted.  Call the initialization hook. */
  24         if (vtreefs_hooks->init_hook != NULL)
  25                 vtreefs_hooks->init_hook();
  26
  27         /* Return the root inode's properties. */
  28         root_node->fn_ino_nr = get_inode_number(root);
  29         root_node->fn_mode = root->i_stat.mode;
  30         root_node->fn_size = root->i_stat.size;
  31         root_node->fn_uid = root->i_stat.uid;
  32         root_node->fn_gid = root->i_stat.gid;
  33         root_node->fn_dev = NO_DEV;
  34
  35         *res_flags = RES_NOFLAGS;
  36
  37         return OK;
  38 }
  39
  40 /*
  41  * Unmount the file system.
  42  */
  43 void
  44 fs_unmount(void)
  45 {
  46         struct inode *root;
  47
  48         /* Decrease the count of the root inode. */
  49         root = get_root_inode();
  50
  51         put_inode(root);
  52
  53         /* The system is unmounted.  Call the cleanup hook. */
  54         if (vtreefs_hooks->cleanup_hook != NULL)
  55                 vtreefs_hooks->cleanup_hook();
  56 }