quotaio_meta.c

   1 /*
   2  *      Implementation of handling of quotafiles which are hidden
   3  *
   4  *      Jan Kara <jack@suse.cz>
   5  */
   6
   7 #include "config.h"
   8
   9 #include <string.h>
  10 #include <stdlib.h>
  11
  12 #include <sys/types.h>
  13
  14 #include "pot.h"
  15 #include "common.h"
  16 #include "quotasys.h"
  17 #include "quotaio_generic.h"
  18
  19 static int meta_init_io(struct quota_handle *h)
  20 {
  21         if (!QIO_ENABLED(h)) {
  22                 errstr(_("Metadata init_io called when kernel support is not enabled.\n"));
  23                 return -1;
  24         }
  25         if (kernel_iface != IFACE_GENERIC) {
  26                 errstr(_("Metadata init_io called when kernel does not support generic quota interface!\n"));
  27                 return -1;
  28         }
  29         return vfs_get_info(h);
  30 }
  31
  32 static int meta_write_info(struct quota_handle *h)
  33 {
  34         return vfs_set_info(h, IIF_BGRACE | IIF_IGRACE);
  35 }
  36
  37 static struct dquot *meta_read_dquot(struct quota_handle *h, qid_t id)
  38 {
  39         struct dquot *dquot = get_empty_dquot();
  40
  41         dquot->dq_id = id;
  42         dquot->dq_h = h;
  43         memset(&dquot->dq_dqb, 0, sizeof(struct util_dqblk));
  44         if (vfs_get_dquot(dquot) < 0) {
  45                 free(dquot);
  46                 return NULL;
  47         }
  48         return dquot;
  49 }
  50
  51 static int meta_commit_dquot(struct dquot *dquot, int flags)
  52 {
  53         return vfs_set_dquot(dquot, flags);
  54 }
  55
  56 static int meta_scan_dquots(struct quota_handle *h, int (*process_dquot)(struct dquot *dquot, char *dqname))
  57 {
  58         return generic_scan_dquots(h, process_dquot, vfs_get_dquot);
  59 }
  60
  61 struct quotafile_ops quotafile_ops_meta = {
  62 init_io:        meta_init_io,
  63 write_info:     meta_write_info,
  64 read_dquot:     meta_read_dquot,
  65 commit_dquot:   meta_commit_dquot,
  66 scan_dquots:    meta_scan_dquots,
  67 };