fs/xfs/quota/xfs_qm_stats.c

   1 /*
   2  * Copyright (c) 2000-2003 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
  33 #include "xfs.h"
  34 #include "xfs_fs.h"
  35 #include "xfs_inum.h"
  36 #include "xfs_log.h"
  37 #include "xfs_trans.h"
  38 #include "xfs_sb.h"
  39 #include "xfs_dir.h"
  40 #include "xfs_dir2.h"
  41 #include "xfs_alloc.h"
  42 #include "xfs_dmapi.h"
  43 #include "xfs_quota.h"
  44 #include "xfs_mount.h"
  45 #include "xfs_alloc_btree.h"
  46 #include "xfs_bmap_btree.h"
  47 #include "xfs_ialloc_btree.h"
  48 #include "xfs_btree.h"
  49 #include "xfs_ialloc.h"
  50 #include "xfs_attr_sf.h"
  51 #include "xfs_dir_sf.h"
  52 #include "xfs_dir2_sf.h"
  53 #include "xfs_dinode.h"
  54 #include "xfs_inode.h"
  55 #include "xfs_bmap.h"
  56 #include "xfs_bit.h"
  57 #include "xfs_rtalloc.h"
  58 #include "xfs_error.h"
  59 #include "xfs_itable.h"
  60 #include "xfs_rw.h"
  61 #include "xfs_acl.h"
  62 #include "xfs_cap.h"
  63 #include "xfs_mac.h"
  64 #include "xfs_attr.h"
  65 #include "xfs_buf_item.h"
  66
  67 #include "xfs_qm.h"
  68
  69 struct xqmstats xqmstats;
  70
  71 STATIC int
  72 xfs_qm_read_xfsquota(
  73         char            *buffer,
  74         char            **start,
  75         off_t           offset,
  76         int             count,
  77         int             *eof,
  78         void            *data)
  79 {
  80         int             len;
  81
  82         /* maximum; incore; ratio free to inuse; freelist */
  83         len = sprintf(buffer, "%d\t%d\t%d\t%u\n",
  84                         ndquot,
  85                         xfs_Gqm? atomic_read(&xfs_Gqm->qm_totaldquots) : 0,
  86                         xfs_Gqm? xfs_Gqm->qm_dqfree_ratio : 0,
  87                         xfs_Gqm? xfs_Gqm->qm_dqfreelist.qh_nelems : 0);
  88
  89         if (offset >= len) {
  90                 *start = buffer;
  91                 *eof = 1;
  92                 return 0;
  93         }
  94         *start = buffer + offset;
  95         if ((len -= offset) > count)
  96                 return count;
  97         *eof = 1;
  98
  99         return len;
 100 }
 101
 102 STATIC int
 103 xfs_qm_read_stats(
 104         char            *buffer,
 105         char            **start,
 106         off_t           offset,
 107         int             count,
 108         int             *eof,
 109         void            *data)
 110 {
 111         int             len;
 112
 113         /* quota performance statistics */
 114         len = sprintf(buffer, "qm %u %u %u %u %u %u %u %u\n",
 115                         xqmstats.xs_qm_dqreclaims,
 116                         xqmstats.xs_qm_dqreclaim_misses,
 117                         xqmstats.xs_qm_dquot_dups,
 118                         xqmstats.xs_qm_dqcachemisses,
 119                         xqmstats.xs_qm_dqcachehits,
 120                         xqmstats.xs_qm_dqwants,
 121                         xqmstats.xs_qm_dqshake_reclaims,
 122                         xqmstats.xs_qm_dqinact_reclaims);
 123
 124         if (offset >= len) {
 125                 *start = buffer;
 126                 *eof = 1;
 127                 return 0;
 128         }
 129         *start = buffer + offset;
 130         if ((len -= offset) > count)
 131                 return count;
 132         *eof = 1;
 133
 134         return len;
 135 }
 136
 137 void
 138 xfs_qm_init_procfs(void)
 139 {
 140         create_proc_read_entry("fs/xfs/xqmstat", 0, 0, xfs_qm_read_stats, NULL);
 141         create_proc_read_entry("fs/xfs/xqm", 0, 0, xfs_qm_read_xfsquota, NULL);
 142 }
 143
 144 void
 145 xfs_qm_cleanup_procfs(void)
 146 {
 147         remove_proc_entry("fs/xfs/xqm", NULL);
 148         remove_proc_entry("fs/xfs/xqmstat", NULL);
 149 }