quotaio_rpc.c

   1 /*
   2  *      quotaio_rpc.c - quota IO operations for RPC (just wrappers for RPC calls)
   3  */
   4
   5 #include "config.h"
   6
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <stdlib.h>
  10 #include <sys/types.h>
  11
  12 #include "common.h"
  13 #include "quotaio.h"
  14 #include "dqblk_rpc.h"
  15 #include "rquota_client.h"
  16 #include "pot.h"
  17
  18 static int rpc_init_io(struct quota_handle *h);
  19 static struct dquot *rpc_read_dquot(struct quota_handle *h, qid_t id);
  20 static int rpc_commit_dquot(struct dquot *dquot, int flags);
  21
  22 struct quotafile_ops quotafile_ops_rpc = {
  23 init_io:        rpc_init_io,
  24 read_dquot:     rpc_read_dquot,
  25 commit_dquot:   rpc_commit_dquot
  26 };
  27
  28 /*
  29  * Define maximal values RPC client can transmit to server.
  30  */
  31 static int rpc_init_io(struct quota_handle *h)
  32 {
  33 #ifdef RPC
  34         h->qh_info.dqi_max_b_limit = ~(uint32_t)0;
  35         h->qh_info.dqi_max_i_limit = ~(uint32_t)0;
  36         h->qh_info.dqi_max_b_usage = (~(uint32_t)0) << QUOTABLOCK_BITS;
  37         h->qh_info.dqi_max_i_usage = ~(uint32_t)0;
  38         return 0;
  39 #else
  40         return -1;
  41 #endif
  42 }
  43
  44 /*
  45  *      Read a dqblk struct from RPC server - just wrapper function.
  46  */
  47 static struct dquot *rpc_read_dquot(struct quota_handle *h, qid_t id)
  48 {
  49 #ifdef RPC
  50         struct dquot *dquot = get_empty_dquot();
  51         int ret;
  52
  53         dquot->dq_id = id;
  54         dquot->dq_h = h;
  55         if ((ret = rpc_rquota_get(dquot)) < 0) {
  56                 errno = -ret;
  57                 free(dquot);
  58                 return NULL;
  59         }
  60         return dquot;
  61 #else
  62         errno = ENOTSUP;
  63         return NULL;
  64 #endif
  65 }
  66
  67 /*
  68  *      Write a dqblk struct to RPC server - just wrapper function.
  69  */
  70 static int rpc_commit_dquot(struct dquot *dquot, int flags)
  71 {
  72 #ifdef RPC
  73         int ret;
  74
  75         if (QIO_RO(dquot->dq_h)) {
  76                 errstr(_("Trying to write quota to readonly quotafile on %s\n"), dquot->dq_h->qh_quotadev);
  77                 errno = EPERM;
  78                 return -1;
  79         }
  80         if ((ret = rpc_rquota_set(QCMD(Q_RPC_SETQUOTA, dquot->dq_h->qh_type), dquot)) < 0) {
  81                 errno = -ret;
  82                 return -1;
  83         }
  84         return 0;
  85 #else
  86         errno = ENOTSUP;
  87         return -1;
  88 #endif
  89 }