fs/xfs/xfs_qmops.c

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #include "xfs.h"
  33
  34 #include "xfs_macros.h"
  35 #include "xfs_types.h"
  36 #include "xfs_inum.h"
  37 #include "xfs_log.h"
  38 #include "xfs_trans.h"
  39 #include "xfs_sb.h"
  40 #include "xfs_ag.h"
  41 #include "xfs_dir.h"
  42 #include "xfs_dir2.h"
  43 #include "xfs_dmapi.h"
  44 #include "xfs_mount.h"
  45 #include "xfs_quota.h"
  46 #include "xfs_error.h"
  47
  48 STATIC struct xfs_dquot *
  49 xfs_dqvopchown_default(
  50         struct xfs_trans        *tp,
  51         struct xfs_inode        *ip,
  52         struct xfs_dquot        **dqp,
  53         struct xfs_dquot        *dq)
  54 {
  55         return NULL;
  56 }
  57
  58 /*
  59  * Clear the quotaflags in memory and in the superblock.
  60  */
  61 int
  62 xfs_mount_reset_sbqflags(xfs_mount_t *mp)
  63 {
  64         int                     error;
  65         xfs_trans_t             *tp;
  66         unsigned long           s;
  67
  68         mp->m_qflags = 0;
  69         /*
  70          * It is OK to look at sb_qflags here in mount path,
  71          * without SB_LOCK.
  72          */
  73         if (mp->m_sb.sb_qflags == 0)
  74                 return 0;
  75         s = XFS_SB_LOCK(mp);
  76         mp->m_sb.sb_qflags = 0;
  77         XFS_SB_UNLOCK(mp, s);
  78
  79         /*
  80          * if the fs is readonly, let the incore superblock run
  81          * with quotas off but don't flush the update out to disk
  82          */
  83         if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
  84                 return 0;
  85 #ifdef QUOTADEBUG
  86         xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
  87 #endif
  88         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
  89         if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
  90                                       XFS_DEFAULT_LOG_COUNT))) {
  91                 xfs_trans_cancel(tp, 0);
  92                 xfs_fs_cmn_err(CE_ALERT, mp,
  93                         "xfs_mount_reset_sbqflags: Superblock update failed!");
  94                 return error;
  95         }
  96         xfs_mod_sb(tp, XFS_SB_QFLAGS);
  97         error = xfs_trans_commit(tp, 0, NULL);
  98         return error;
  99 }
 100
 101 STATIC int
 102 xfs_noquota_init(
 103         xfs_mount_t     *mp,
 104         uint            *needquotamount,
 105         uint            *quotaflags)
 106 {
 107         int             error = 0;
 108
 109         *quotaflags = 0;
 110         *needquotamount = B_FALSE;
 111
 112         ASSERT(!XFS_IS_QUOTA_ON(mp));
 113
 114         /*
 115          * If a file system had quotas running earlier, but decided to
 116          * mount without -o uquota/pquota/gquota options, revoke the
 117          * quotachecked license.
 118          */
 119         if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
 120                 cmn_err(CE_NOTE,
 121                         "XFS resetting qflags for filesystem %s",
 122                         mp->m_fsname);
 123
 124                 error = xfs_mount_reset_sbqflags(mp);
 125         }
 126         return error;
 127 }
 128
 129 xfs_qmops_t     xfs_qmcore_stub = {
 130         .xfs_qminit             = (xfs_qminit_t) xfs_noquota_init,
 131         .xfs_qmdone             = (xfs_qmdone_t) fs_noerr,
 132         .xfs_qmmount            = (xfs_qmmount_t) fs_noerr,
 133         .xfs_qmunmount          = (xfs_qmunmount_t) fs_noerr,
 134         .xfs_dqrele             = (xfs_dqrele_t) fs_noerr,
 135         .xfs_dqattach           = (xfs_dqattach_t) fs_noerr,
 136         .xfs_dqdetach           = (xfs_dqdetach_t) fs_noerr,
 137         .xfs_dqpurgeall         = (xfs_dqpurgeall_t) fs_noerr,
 138         .xfs_dqvopalloc         = (xfs_dqvopalloc_t) fs_noerr,
 139         .xfs_dqvopcreate        = (xfs_dqvopcreate_t) fs_noerr,
 140         .xfs_dqvoprename        = (xfs_dqvoprename_t) fs_noerr,
 141         .xfs_dqvopchown         = xfs_dqvopchown_default,
 142         .xfs_dqvopchownresv     = (xfs_dqvopchownresv_t) fs_noerr,
 143 };