journal_obdfs.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    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  *  Copyright (C) 2000 Red Hat, Inc.
    6  *  Copyright (C) 2000 Los Alamos National Laboratory
    7  *  Copyright (C) 2000 TurboLinux, Inc.
    8  *  Copyright (C) 2001 Mountain View Data, Inc.
    9  *
   10  *   This file is part of InterMezzo, http://www.inter-mezzo.org.
   11  *
   12  *   InterMezzo is free software; you can redistribute it and/or
   13  *   modify it under the terms of version 2 of the GNU General Public
   14  *   License as published by the Free Software Foundation.
   15  *
   16  *   InterMezzo is distributed in the hope that it will be useful,
   17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   19  *   GNU General Public License for more details.
   20  *
   21  *   You should have received a copy of the GNU General Public License
   22  *   along with InterMezzo; if not, write to the Free Software
   23  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   24  */
   25 
   26 #include <linux/types.h>
   27 #include <linux/param.h>
   28 #include <linux/kernel.h>
   29 #include <linux/sched.h>
   30 #include <linux/fs.h>
   31 #include <linux/slab.h>
   32 #include <linux/vmalloc.h>
   33 #include <linux/stat.h>
   34 #include <linux/errno.h>
   35 #include <linux/locks.h>
   36 #include <asm/segment.h>
   37 #include <asm/uaccess.h>
   38 #include <linux/string.h>
   39 #ifdef CONFIG_OBDFS_FS
   40 #include /usr/src/obd/include/linux/obdfs.h
   41 #endif
   42 
   43 #include <linux/intermezzo_fs.h>
   44 #include <linux/intermezzo_psdev.h>
   45 
   46 #ifdef CONFIG_OBDFS_FS
   47 
   48 
   49 static unsigned long presto_obdfs_freespace(struct presto_file_set *fset,
   50                                          struct super_block *sb)
   51 {
   52         return 0x0fffff; 
   53 }
   54 
   55 /* start the filesystem journal operations */
   56 static void *presto_obdfs_trans_start(struct presto_file_set *fset, 
   57                                    struct inode *inode, 
   58                                    int op)
   59 {
   60 
   61         return (void *) 1;
   62 }
   63 
   64 #if 0
   65         int jblocks;
   66         int trunc_blks, one_path_blks, extra_path_blks, 
   67                 extra_name_blks, lml_blks; 
   68         __u32 avail_kmlblocks;
   69 
   70         if ( presto_no_journal(fset) ||
   71              strcmp(fset->fset_cache->cache_type, "ext3"))
   72           {
   73             CDEBUG(D_JOURNAL, "got cache_type \"%s\"\n",
   74                    fset->fset_cache->cache_type);
   75             return NULL;
   76           }
   77 
   78         avail_kmlblocks = inode->i_sb->u.ext3_sb.s_es->s_free_blocks_count;
   79         
   80         if ( avail_kmlblocks < 3 ) {
   81                 return ERR_PTR(-ENOSPC);
   82         }
   83         
   84         if (  (op != PRESTO_OP_UNLINK && op != PRESTO_OP_RMDIR)
   85               && avail_kmlblocks < 6 ) {
   86                 return ERR_PTR(-ENOSPC);
   87         }            
   88 
   89         /* Need journal space for:
   90              at least three writes to KML (two one block writes, one a path) 
   91              possibly a second name (unlink, rmdir)
   92              possibly a second path (symlink, rename)
   93              a one block write to the last rcvd file 
   94         */
   95 
   96         trunc_blks = EXT3_DATA_TRANS_BLOCKS + 1; 
   97         one_path_blks = 4*EXT3_DATA_TRANS_BLOCKS + MAX_PATH_BLOCKS(inode) + 3;
   98         lml_blks = 4*EXT3_DATA_TRANS_BLOCKS + MAX_PATH_BLOCKS(inode) + 2;
   99         extra_path_blks = EXT3_DATA_TRANS_BLOCKS + MAX_PATH_BLOCKS(inode); 
  100         extra_name_blks = EXT3_DATA_TRANS_BLOCKS + MAX_NAME_BLOCKS(inode); 
  101 
  102         /* additional blocks appear for "two pathname" operations
  103            and operations involving the LML records 
  104         */
  105         switch (op) {
  106         case PRESTO_OP_TRUNC:
  107                 jblocks = one_path_blks + extra_name_blks + trunc_blks
  108                         + EXT3_DELETE_TRANS_BLOCKS; 
  109                 break;
  110         case PRESTO_OP_RELEASE:
  111                 /* 
  112                 jblocks = one_path_blks + lml_blks + 2*trunc_blks; 
  113                 */
  114                 jblocks = one_path_blks; 
  115                 break;
  116         case PRESTO_OP_SETATTR:
  117                 jblocks = one_path_blks + trunc_blks + 1 ; 
  118                 break;
  119         case PRESTO_OP_CREATE:
  120                 jblocks = one_path_blks + trunc_blks 
  121                         + EXT3_DATA_TRANS_BLOCKS + 3; 
  122                 break;
  123         case PRESTO_OP_LINK:
  124                 jblocks = one_path_blks + trunc_blks 
  125                         + EXT3_DATA_TRANS_BLOCKS; 
  126                 break;
  127         case PRESTO_OP_UNLINK:
  128                 jblocks = one_path_blks + extra_name_blks + trunc_blks
  129                         + EXT3_DELETE_TRANS_BLOCKS; 
  130                 break;
  131         case PRESTO_OP_SYMLINK:
  132                 jblocks = one_path_blks + extra_path_blks + trunc_blks
  133                         + EXT3_DATA_TRANS_BLOCKS + 5; 
  134                 break;
  135         case PRESTO_OP_MKDIR:
  136                 jblocks = one_path_blks + trunc_blks
  137                         + EXT3_DATA_TRANS_BLOCKS + 4;
  138                 break;
  139         case PRESTO_OP_RMDIR:
  140                 jblocks = one_path_blks + extra_name_blks + trunc_blks
  141                         + EXT3_DELETE_TRANS_BLOCKS; 
  142                 break;
  143         case PRESTO_OP_MKNOD:
  144                 jblocks = one_path_blks + trunc_blks + 
  145                         EXT3_DATA_TRANS_BLOCKS + 3;
  146                 break;
  147         case PRESTO_OP_RENAME:
  148                 jblocks = one_path_blks + extra_path_blks + trunc_blks + 
  149                         2 * EXT3_DATA_TRANS_BLOCKS + 2;
  150                 break;
  151         case PRESTO_OP_WRITE:
  152                 jblocks = one_path_blks; 
  153                 /*  add this when we can wrap our transaction with 
  154                     that of ext3_file_write (ordered writes)
  155                     +  EXT3_DATA_TRANS_BLOCKS;
  156                 */
  157                 break;
  158         default:
  159                 CDEBUG(D_JOURNAL, "invalid operation %d for journal\n", op);
  160                 return NULL;
  161         }
  162 
  163         CDEBUG(D_JOURNAL, "creating journal handle (%d blocks)\n", jblocks);
  164         return journal_start(EXT3_JOURNAL(inode), jblocks);
  165 }
  166 #endif
  167 
  168 void presto_obdfs_trans_commit(struct presto_file_set *fset, void *handle)
  169 {
  170 #if 0
  171         if ( presto_no_journal(fset) || !handle)
  172                 return;
  173 
  174         journal_stop(handle);
  175 #endif
  176 }
  177 
  178 void presto_obdfs_journal_file_data(struct inode *inode)
  179 {
  180 #ifdef EXT3_JOURNAL_DATA_FL
  181         inode->u.ext3_i.i_flags |= EXT3_JOURNAL_DATA_FL;
  182 #else
  183 #warning You must have a facility to enable journaled writes for recovery!
  184 #endif
  185 }
  186 
  187 struct journal_ops presto_obdfs_journal_ops = {
  188         .tr_avail        = presto_obdfs_freespace,
  189         .tr_start        =  presto_obdfs_trans_start,
  190         .tr_commit       = presto_obdfs_trans_commit,
  191         .tr_journal_data = presto_obdfs_journal_file_data
  192 };
  193 
  194 #endif

Cache object: 01b24a51f622954836f4ea33e83384b9

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

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

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