journal_xfs.c

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    1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
    2  * vim:expandtab:shiftwidth=8:tabstop=8:
    3  *
    4  *  Copyright (C) 1998 Peter J. Braam <braam@clusterfs.com>
    5  *
    6  *   This file is part of InterMezzo, http://www.inter-mezzo.org.
    7  *
    8  *   InterMezzo is free software; you can redistribute it and/or
    9  *   modify it under the terms of version 2 of the GNU General Public
   10  *   License as published by the Free Software Foundation.
   11  *
   12  *   InterMezzo is distributed in the hope that it will be useful,
   13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15  *   GNU General Public License for more details.
   16  *
   17  *   You should have received a copy of the GNU General Public License
   18  *   along with InterMezzo; if not, write to the Free Software
   19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   20  */
   21 
   22 #include <linux/types.h>
   23 #include <linux/kernel.h>
   24 #include <linux/sched.h>
   25 #include <linux/fs.h>
   26 #include <linux/slab.h>
   27 #include <linux/vmalloc.h>
   28 #include <linux/stat.h>
   29 #include <linux/errno.h>
   30 #include <linux/locks.h>
   31 #include <asm/segment.h>
   32 #include <asm/uaccess.h>
   33 #include <linux/string.h>
   34 #if 0
   35 /* XFS Support not there yet */
   36 #ifdef CONFIG_FS_XFS
   37 #include <linux/xfs_fs.h>
   38 #endif
   39 #include <linux/intermezzo_fs.h>
   40 #include <linux/intermezzo_psdev.h>
   41 #include <linux/intermezzo_journal.h>
   42 
   43 #if 0
   44 
   45 /* XFS has journalling, but these functions do nothing yet... */
   46 
   47 static unsigned long presto_xfs_freespace(struct presto_file_set *fset,
   48                                          struct super_block *sb)
   49 {
   50 
   51 #if 0
   52         vfs_t *vfsp = LINVFS_GET_VFS(sb);
   53         struct statvfs_t stat; 
   54         bhv_desc_t *bdp;
   55         unsigned long avail; 
   56         int rc;
   57 
   58         VFS_STATVFS(vfsp, &stat, NULL, rc);
   59         avail = statp.f_bfree;
   60 
   61         return sbp->sb_fdblocks;; 
   62 #endif
   63         return 0x0fffffff;
   64 }
   65 
   66 
   67 /* start the filesystem journal operations */
   68 static void *
   69 presto_xfs_trans_start(struct presto_file_set *fset,
   70                        struct inode *inode, int op)
   71 {
   72         int xfs_op;
   73         /* do a free blocks check as in journal_ext3? does anything protect
   74          * the space in that case or can it disappear out from under us
   75          * anyway? */
   76         
   77 /* copied from xfs_trans.h, skipping header maze for now */
   78 #define XFS_TRANS_SETATTR_NOT_SIZE      1
   79 #define XFS_TRANS_SETATTR_SIZE          2
   80 #define XFS_TRANS_INACTIVE              3
   81 #define XFS_TRANS_CREATE                4
   82 #define XFS_TRANS_CREATE_TRUNC          5
   83 #define XFS_TRANS_TRUNCATE_FILE         6
   84 #define XFS_TRANS_REMOVE                7
   85 #define XFS_TRANS_LINK                  8
   86 #define XFS_TRANS_RENAME                9
   87 #define XFS_TRANS_MKDIR                 10
   88 #define XFS_TRANS_RMDIR                 11
   89 #define XFS_TRANS_SYMLINK               12
   90 
   91         /* map the op onto the values for XFS so it can do reservation. if
   92          * we don't have enough info to differentiate between e.g. setattr
   93          * with or without size, what do we do? will it adjust? */
   94         switch (op) {
   95         case PRESTO_OP_SETATTR:
   96                 /* or XFS_TRANS_SETATTR_NOT_SIZE? */
   97                 xfs_op = XFS_TRANS_SETATTR_SIZE;
   98                 break;
   99         case PRESTO_OP_CREATE:
  100                 /* or CREATE_TRUNC? */
  101                 xfs_op = XFS_TRANS_CREATE;
  102                 break;
  103         case PRESTO_OP_LINK:
  104                 xfs_op = XFS_TRANS_LINK;
  105                 break;
  106         case PRESTO_OP_UNLINK:
  107                 xfs_op = XFS_TRANS_REMOVE;
  108                 break;
  109         case PRESTO_OP_SYMLINK:
  110                 xfs_op = XFS_TRANS_SYMLINK;
  111                 break;
  112         case PRESTO_OP_MKDIR:
  113                 xfs_op = XFS_TRANS_MKDIR;
  114                 break;
  115         case PRESTO_OP_RMDIR:
  116                 xfs_op = XFS_TRANS_RMDIR;
  117                 break;
  118         case PRESTO_OP_MKNOD:
  119                 /* XXX can't find an analog for mknod? */
  120                 xfs_op = XFS_TRANS_CREATE;
  121                 break;
  122         case PRESTO_OP_RENAME:
  123                 xfs_op = XFS_TRANS_RENAME;
  124                 break;
  125         default:
  126                 CDEBUG(D_JOURNAL, "invalid operation %d for journal\n", op);
  127                 return NULL;
  128         }
  129 
  130         return xfs_trans_start(inode, xfs_op);
  131 }
  132 
  133 static void presto_xfs_trans_commit(struct presto_file_set *fset, void *handle)
  134 {
  135         /* assert (handle == current->j_handle) */
  136         xfs_trans_stop(handle);
  137 }
  138 
  139 static void presto_xfs_journal_file_data(struct inode *inode)
  140 {
  141         return; 
  142 }
  143 
  144 static int presto_xfs_has_all_data(struct inode *inode)
  145 {
  146         BUG();
  147         return 0;
  148 }
  149 
  150 struct journal_ops presto_xfs_journal_ops = {
  151         .tr_all_data     = presto_xfs_has_all_data,
  152         .tr_avail        = presto_xfs_freespace,
  153         .tr_start        = presto_xfs_trans_start,
  154         .tr_commit       = presto_xfs_trans_commit,
  155         .tr_journal_data = presto_xfs_journal_file_data
  156 };
  157 
  158 #endif
  159 
  160 
  161 #endif /* CONFIG_XFS_FS */
  162

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FreeBSD/Linux Kernel Cross Reference sys/fs/intermezzo/journal_xfs.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/intermezzo/journal_xfs.c