fs/dlm/util.c

   1 /******************************************************************************
   2 *******************************************************************************
   3 **
   4 **  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
   5 **
   6 **  This copyrighted material is made available to anyone wishing to use,
   7 **  modify, copy, or redistribute it subject to the terms and conditions
   8 **  of the GNU General Public License v.2.
   9 **
  10 *******************************************************************************
  11 ******************************************************************************/
  12
  13 #include "dlm_internal.h"
  14 #include "rcom.h"
  15 #include "util.h"
  16
  17 #define DLM_ERRNO_EDEADLK               35
  18 #define DLM_ERRNO_EBADR                 53
  19 #define DLM_ERRNO_EBADSLT               57
  20 #define DLM_ERRNO_EPROTO                71
  21 #define DLM_ERRNO_EOPNOTSUPP            95
  22 #define DLM_ERRNO_ETIMEDOUT            110
  23 #define DLM_ERRNO_EINPROGRESS          115
  24
  25 static void header_out(struct dlm_header *hd)
  26 {
  27         hd->h_version           = cpu_to_le32(hd->h_version);
  28         hd->h_lockspace         = cpu_to_le32(hd->h_lockspace);
  29         hd->h_nodeid            = cpu_to_le32(hd->h_nodeid);
  30         hd->h_length            = cpu_to_le16(hd->h_length);
  31 }
  32
  33 static void header_in(struct dlm_header *hd)
  34 {
  35         hd->h_version           = le32_to_cpu(hd->h_version);
  36         hd->h_lockspace         = le32_to_cpu(hd->h_lockspace);
  37         hd->h_nodeid            = le32_to_cpu(hd->h_nodeid);
  38         hd->h_length            = le16_to_cpu(hd->h_length);
  39 }
  40
  41 /* higher errno values are inconsistent across architectures, so select
  42    one set of values for on the wire */
  43
  44 static int to_dlm_errno(int err)
  45 {
  46         switch (err) {
  47         case -EDEADLK:
  48                 return -DLM_ERRNO_EDEADLK;
  49         case -EBADR:
  50                 return -DLM_ERRNO_EBADR;
  51         case -EBADSLT:
  52                 return -DLM_ERRNO_EBADSLT;
  53         case -EPROTO:
  54                 return -DLM_ERRNO_EPROTO;
  55         case -EOPNOTSUPP:
  56                 return -DLM_ERRNO_EOPNOTSUPP;
  57         case -ETIMEDOUT:
  58                 return -DLM_ERRNO_ETIMEDOUT;
  59         case -EINPROGRESS:
  60                 return -DLM_ERRNO_EINPROGRESS;
  61         }
  62         return err;
  63 }
  64
  65 static int from_dlm_errno(int err)
  66 {
  67         switch (err) {
  68         case -DLM_ERRNO_EDEADLK:
  69                 return -EDEADLK;
  70         case -DLM_ERRNO_EBADR:
  71                 return -EBADR;
  72         case -DLM_ERRNO_EBADSLT:
  73                 return -EBADSLT;
  74         case -DLM_ERRNO_EPROTO:
  75                 return -EPROTO;
  76         case -DLM_ERRNO_EOPNOTSUPP:
  77                 return -EOPNOTSUPP;
  78         case -DLM_ERRNO_ETIMEDOUT:
  79                 return -ETIMEDOUT;
  80         case -DLM_ERRNO_EINPROGRESS:
  81                 return -EINPROGRESS;
  82         }
  83         return err;
  84 }
  85
  86 void dlm_message_out(struct dlm_message *ms)
  87 {
  88         header_out(&ms->m_header);
  89
  90         ms->m_type              = cpu_to_le32(ms->m_type);
  91         ms->m_nodeid            = cpu_to_le32(ms->m_nodeid);
  92         ms->m_pid               = cpu_to_le32(ms->m_pid);
  93         ms->m_lkid              = cpu_to_le32(ms->m_lkid);
  94         ms->m_remid             = cpu_to_le32(ms->m_remid);
  95         ms->m_parent_lkid       = cpu_to_le32(ms->m_parent_lkid);
  96         ms->m_parent_remid      = cpu_to_le32(ms->m_parent_remid);
  97         ms->m_exflags           = cpu_to_le32(ms->m_exflags);
  98         ms->m_sbflags           = cpu_to_le32(ms->m_sbflags);
  99         ms->m_flags             = cpu_to_le32(ms->m_flags);
 100         ms->m_lvbseq            = cpu_to_le32(ms->m_lvbseq);
 101         ms->m_hash              = cpu_to_le32(ms->m_hash);
 102         ms->m_status            = cpu_to_le32(ms->m_status);
 103         ms->m_grmode            = cpu_to_le32(ms->m_grmode);
 104         ms->m_rqmode            = cpu_to_le32(ms->m_rqmode);
 105         ms->m_bastmode          = cpu_to_le32(ms->m_bastmode);
 106         ms->m_asts              = cpu_to_le32(ms->m_asts);
 107         ms->m_result            = cpu_to_le32(to_dlm_errno(ms->m_result));
 108 }
 109
 110 void dlm_message_in(struct dlm_message *ms)
 111 {
 112         header_in(&ms->m_header);
 113
 114         ms->m_type              = le32_to_cpu(ms->m_type);
 115         ms->m_nodeid            = le32_to_cpu(ms->m_nodeid);
 116         ms->m_pid               = le32_to_cpu(ms->m_pid);
 117         ms->m_lkid              = le32_to_cpu(ms->m_lkid);
 118         ms->m_remid             = le32_to_cpu(ms->m_remid);
 119         ms->m_parent_lkid       = le32_to_cpu(ms->m_parent_lkid);
 120         ms->m_parent_remid      = le32_to_cpu(ms->m_parent_remid);
 121         ms->m_exflags           = le32_to_cpu(ms->m_exflags);
 122         ms->m_sbflags           = le32_to_cpu(ms->m_sbflags);
 123         ms->m_flags             = le32_to_cpu(ms->m_flags);
 124         ms->m_lvbseq            = le32_to_cpu(ms->m_lvbseq);
 125         ms->m_hash              = le32_to_cpu(ms->m_hash);
 126         ms->m_status            = le32_to_cpu(ms->m_status);
 127         ms->m_grmode            = le32_to_cpu(ms->m_grmode);
 128         ms->m_rqmode            = le32_to_cpu(ms->m_rqmode);
 129         ms->m_bastmode          = le32_to_cpu(ms->m_bastmode);
 130         ms->m_asts              = le32_to_cpu(ms->m_asts);
 131         ms->m_result            = from_dlm_errno(le32_to_cpu(ms->m_result));
 132 }
 133
 134 static void rcom_lock_out(struct rcom_lock *rl)
 135 {
 136         rl->rl_ownpid           = cpu_to_le32(rl->rl_ownpid);
 137         rl->rl_lkid             = cpu_to_le32(rl->rl_lkid);
 138         rl->rl_remid            = cpu_to_le32(rl->rl_remid);
 139         rl->rl_parent_lkid      = cpu_to_le32(rl->rl_parent_lkid);
 140         rl->rl_parent_remid     = cpu_to_le32(rl->rl_parent_remid);
 141         rl->rl_exflags          = cpu_to_le32(rl->rl_exflags);
 142         rl->rl_flags            = cpu_to_le32(rl->rl_flags);
 143         rl->rl_lvbseq           = cpu_to_le32(rl->rl_lvbseq);
 144         rl->rl_result           = cpu_to_le32(rl->rl_result);
 145         rl->rl_wait_type        = cpu_to_le16(rl->rl_wait_type);
 146         rl->rl_namelen          = cpu_to_le16(rl->rl_namelen);
 147 }
 148
 149 static void rcom_lock_in(struct rcom_lock *rl)
 150 {
 151         rl->rl_ownpid           = le32_to_cpu(rl->rl_ownpid);
 152         rl->rl_lkid             = le32_to_cpu(rl->rl_lkid);
 153         rl->rl_remid            = le32_to_cpu(rl->rl_remid);
 154         rl->rl_parent_lkid      = le32_to_cpu(rl->rl_parent_lkid);
 155         rl->rl_parent_remid     = le32_to_cpu(rl->rl_parent_remid);
 156         rl->rl_exflags          = le32_to_cpu(rl->rl_exflags);
 157         rl->rl_flags            = le32_to_cpu(rl->rl_flags);
 158         rl->rl_lvbseq           = le32_to_cpu(rl->rl_lvbseq);
 159         rl->rl_result           = le32_to_cpu(rl->rl_result);
 160         rl->rl_wait_type        = le16_to_cpu(rl->rl_wait_type);
 161         rl->rl_namelen          = le16_to_cpu(rl->rl_namelen);
 162 }
 163
 164 static void rcom_config_out(struct rcom_config *rf)
 165 {
 166         rf->rf_lvblen           = cpu_to_le32(rf->rf_lvblen);
 167         rf->rf_lsflags          = cpu_to_le32(rf->rf_lsflags);
 168 }
 169
 170 static void rcom_config_in(struct rcom_config *rf)
 171 {
 172         rf->rf_lvblen           = le32_to_cpu(rf->rf_lvblen);
 173         rf->rf_lsflags          = le32_to_cpu(rf->rf_lsflags);
 174 }
 175
 176 void dlm_rcom_out(struct dlm_rcom *rc)
 177 {
 178         int type = rc->rc_type;
 179
 180         header_out(&rc->rc_header);
 181
 182         rc->rc_type             = cpu_to_le32(rc->rc_type);
 183         rc->rc_result           = cpu_to_le32(rc->rc_result);
 184         rc->rc_id               = cpu_to_le64(rc->rc_id);
 185         rc->rc_seq              = cpu_to_le64(rc->rc_seq);
 186         rc->rc_seq_reply        = cpu_to_le64(rc->rc_seq_reply);
 187
 188         if ((type == DLM_RCOM_LOCK) || (type == DLM_RCOM_LOCK_REPLY))
 189                 rcom_lock_out((struct rcom_lock *) rc->rc_buf);
 190
 191         else if (type == DLM_RCOM_STATUS_REPLY)
 192                 rcom_config_out((struct rcom_config *) rc->rc_buf);
 193 }
 194
 195 void dlm_rcom_in(struct dlm_rcom *rc)
 196 {
 197         int type;
 198
 199         header_in(&rc->rc_header);
 200
 201         rc->rc_type             = le32_to_cpu(rc->rc_type);
 202         rc->rc_result           = le32_to_cpu(rc->rc_result);
 203         rc->rc_id               = le64_to_cpu(rc->rc_id);
 204         rc->rc_seq              = le64_to_cpu(rc->rc_seq);
 205         rc->rc_seq_reply        = le64_to_cpu(rc->rc_seq_reply);
 206
 207         type = rc->rc_type;
 208
 209         if ((type == DLM_RCOM_LOCK) || (type == DLM_RCOM_LOCK_REPLY))
 210                 rcom_lock_in((struct rcom_lock *) rc->rc_buf);
 211
 212         else if (type == DLM_RCOM_STATUS_REPLY)
 213                 rcom_config_in((struct rcom_config *) rc->rc_buf);
 214 }
 215