release/src-rt-6.x/linux/linux-2.6/fs/xfs/quota/xfs_qm_stats.c

   1 /*
   2  * Copyright (c) 2000-2003 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_bit.h"
  21 #include "xfs_log.h"
  22 #include "xfs_inum.h"
  23 #include "xfs_trans.h"
  24 #include "xfs_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_dir2.h"
  27 #include "xfs_alloc.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_quota.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_bmap_btree.h"
  32 #include "xfs_alloc_btree.h"
  33 #include "xfs_ialloc_btree.h"
  34 #include "xfs_dir2_sf.h"
  35 #include "xfs_attr_sf.h"
  36 #include "xfs_dinode.h"
  37 #include "xfs_inode.h"
  38 #include "xfs_ialloc.h"
  39 #include "xfs_itable.h"
  40 #include "xfs_bmap.h"
  41 #include "xfs_btree.h"
  42 #include "xfs_rtalloc.h"
  43 #include "xfs_error.h"
  44 #include "xfs_rw.h"
  45 #include "xfs_acl.h"
  46 #include "xfs_attr.h"
  47 #include "xfs_buf_item.h"
  48 #include "xfs_qm.h"
  49
  50 struct xqmstats xqmstats;
  51
  52 STATIC int
  53 xfs_qm_read_xfsquota(
  54         char            *buffer,
  55         char            **start,
  56         off_t           offset,
  57         int             count,
  58         int             *eof,
  59         void            *data)
  60 {
  61         int             len;
  62
  63         /* maximum; incore; ratio free to inuse; freelist */
  64         len = sprintf(buffer, "%d\t%d\t%d\t%u\n",
  65                         ndquot,
  66                         xfs_Gqm? atomic_read(&xfs_Gqm->qm_totaldquots) : 0,
  67                         xfs_Gqm? xfs_Gqm->qm_dqfree_ratio : 0,
  68                         xfs_Gqm? xfs_Gqm->qm_dqfreelist.qh_nelems : 0);
  69
  70         if (offset >= len) {
  71                 *start = buffer;
  72                 *eof = 1;
  73                 return 0;
  74         }
  75         *start = buffer + offset;
  76         if ((len -= offset) > count)
  77                 return count;
  78         *eof = 1;
  79
  80         return len;
  81 }
  82
  83 STATIC int
  84 xfs_qm_read_stats(
  85         char            *buffer,
  86         char            **start,
  87         off_t           offset,
  88         int             count,
  89         int             *eof,
  90         void            *data)
  91 {
  92         int             len;
  93
  94         /* quota performance statistics */
  95         len = sprintf(buffer, "qm %u %u %u %u %u %u %u %u\n",
  96                         xqmstats.xs_qm_dqreclaims,
  97                         xqmstats.xs_qm_dqreclaim_misses,
  98                         xqmstats.xs_qm_dquot_dups,
  99                         xqmstats.xs_qm_dqcachemisses,
 100                         xqmstats.xs_qm_dqcachehits,
 101                         xqmstats.xs_qm_dqwants,
 102                         xqmstats.xs_qm_dqshake_reclaims,
 103                         xqmstats.xs_qm_dqinact_reclaims);
 104
 105         if (offset >= len) {
 106                 *start = buffer;
 107                 *eof = 1;
 108                 return 0;
 109         }
 110         *start = buffer + offset;
 111         if ((len -= offset) > count)
 112                 return count;
 113         *eof = 1;
 114
 115         return len;
 116 }
 117
 118 void
 119 xfs_qm_init_procfs(void)
 120 {
 121         create_proc_read_entry("fs/xfs/xqmstat", 0, NULL, xfs_qm_read_stats, NULL);
 122         create_proc_read_entry("fs/xfs/xqm", 0, NULL, xfs_qm_read_xfsquota, NULL);
 123 }
 124
 125 void
 126 xfs_qm_cleanup_procfs(void)
 127 {
 128         remove_proc_entry("fs/xfs/xqm", NULL);
 129         remove_proc_entry("fs/xfs/xqmstat", NULL);
 130 }