sys/ufs/lfs/ulfs_quota.h

   1 /*      $NetBSD: ulfs_quota.h,v 1.5 2014/06/28 22:27:51 dholland Exp $  */
   2 /*  from NetBSD: ufs_quota.h,v 1.21 2012/02/18 06:13:23 matt Exp  */
   3
   4 /*
   5  * Copyright (c) 1982, 1986, 1990, 1993, 1995
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Robert Elz at The University of Melbourne.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)ufs_quota.c 8.5 (Berkeley) 5/20/95
  36  */
  37 #include <ufs/lfs/ulfs_quota1.h>
  38 #include <ufs/lfs/ulfs_quota2.h>
  39
  40 struct quotakcursor; /* from <sys/quotactl.h> */
  41
  42
  43 /* link to this quota in the quota inode (for QUOTA2) */
  44 struct dq2_desc {
  45         uint64_t dq2_lblkno; /* logical disk block holding this quota */
  46         u_int    dq2_blkoff; /* offset in disk block holding this quota */
  47 };
  48
  49 /*
  50  * The following structure records disk usage for a user or group on a
  51  * filesystem. There is one allocated for each quota that exists on any
  52  * filesystem for the current user or group. A cache is kept of recently
  53  * used entries.
  54  * Field markings and the corresponding locks:
  55  * h:   dqlock
  56  * d:   dq_interlock
  57  *
  58  * Lock order is: dq_interlock -> dqlock
  59  *                dq_interlock -> dqvp
  60  */
  61 struct dquot {
  62         LIST_ENTRY(dquot) dq_hash;      /* h: hash list */
  63         u_int16_t dq_flags;             /* d: flags, see below */
  64         u_int16_t dq_type;              /* d: quota type of this dquot */
  65         u_int32_t dq_cnt;               /* h: count of active references */
  66         u_int32_t dq_id;                /* d: identifier this applies to */
  67         struct  ulfsmount *dq_ump;      /* d: filesystem this is taken from */
  68         kmutex_t dq_interlock;          /* d: lock this dquot */
  69         union {
  70                 struct dqblk dq1_dqb;   /* d: actual usage & quotas */
  71                 struct dq2_desc dq2_desc; /* d: pointer to quota data */
  72         } dq_un;
  73 };
  74
  75 /*
  76  * Flag values.
  77  */
  78 #define DQ_MOD          0x04            /* this quota modified since read */
  79 #define DQ_FAKE         0x08            /* no limits here, just usage */
  80 #define DQ_WARN(ltype)  (0x10 << ltype) /* has been warned about "type" limit */
  81 /*
  82  * Shorthand notation.
  83  */
  84 #define dq_bhardlimit   dq_un.dq1_dqb.dqb_bhardlimit
  85 #define dq_bsoftlimit   dq_un.dq1_dqb.dqb_bsoftlimit
  86 #define dq_curblocks    dq_un.dq1_dqb.dqb_curblocks
  87 #define dq_ihardlimit   dq_un.dq1_dqb.dqb_ihardlimit
  88 #define dq_isoftlimit   dq_un.dq1_dqb.dqb_isoftlimit
  89 #define dq_curinodes    dq_un.dq1_dqb.dqb_curinodes
  90 #define dq_btime        dq_un.dq1_dqb.dqb_btime
  91 #define dq_itime        dq_un.dq1_dqb.dqb_itime
  92
  93 #define dq2_lblkno      dq_un.dq2_desc.dq2_lblkno
  94 #define dq2_blkoff      dq_un.dq2_desc.dq2_blkoff
  95 /*
  96  * If the system has never checked for a quota for this file, then it is
  97  * set to NODQUOT.  Once a write attempt is made the inode pointer is set
  98  * to reference a dquot structure.
  99  */
 100 #define NODQUOT         NULL
 101
 102 extern kmutex_t lfs_dqlock;
 103 extern kcondvar_t lfs_dqcv;
 104 /*
 105  * Quota name to error message mapping.
 106  */
 107 extern const char *lfs_quotatypes[ULFS_MAXQUOTAS];
 108
 109 int  lfs_getinoquota(struct inode *);
 110 int  lfs_dqget(struct vnode *, u_long, struct ulfsmount *, int, struct dquot **);
 111 void lfs_dqref(struct dquot *);
 112 void lfs_dqrele(struct vnode *, struct dquot *);
 113 void lfs_dqflush(struct vnode *);
 114
 115 int lfs_chkdq1(struct inode *, int64_t, kauth_cred_t, int);
 116 int lfs_chkiq1(struct inode *, int32_t, kauth_cred_t, int);
 117 int lfs_q1sync(struct mount *);
 118 int lfs_dq1get(struct vnode *, u_long, struct ulfsmount *, int, struct dquot *);
 119 int lfs_dq1sync(struct vnode *, struct dquot *);
 120 int lfsquota1_handle_cmd_get(struct ulfsmount *, const struct quotakey *,
 121     struct quotaval *);
 122 int lfsquota1_handle_cmd_put(struct ulfsmount *, const struct quotakey *,
 123     const struct quotaval *);
 124 int lfsquota1_handle_cmd_quotaon(struct lwp *, struct ulfsmount *, int,
 125     const char *);
 126 int lfsquota1_handle_cmd_quotaoff(struct lwp *, struct ulfsmount *, int);
 127
 128 int lfs_chkdq2(struct inode *, int64_t, kauth_cred_t, int);
 129 int lfs_chkiq2(struct inode *, int32_t, kauth_cred_t, int);
 130 int lfsquota2_handle_cmd_get(struct ulfsmount *, const struct quotakey *,
 131     struct quotaval *);
 132 int lfsquota2_handle_cmd_put(struct ulfsmount *, const struct quotakey *,
 133     const struct quotaval *);
 134 int lfsquota2_handle_cmd_del(struct ulfsmount *, const struct quotakey *);
 135 int lfsquota2_handle_cmd_cursorget(struct ulfsmount *, struct quotakcursor *,
 136     struct quotakey *, struct quotaval *, unsigned, unsigned *);
 137 int lfsquota2_handle_cmd_cursoropen(struct ulfsmount *, struct quotakcursor *);
 138 int lfsquota2_handle_cmd_cursorclose(struct ulfsmount *, struct quotakcursor *);
 139 int lfsquota2_handle_cmd_cursorskipidtype(struct ulfsmount *, struct quotakcursor *,
 140     int);
 141 int lfsquota2_handle_cmd_cursoratend(struct ulfsmount *, struct quotakcursor *,
 142     int *);
 143 int lfsquota2_handle_cmd_cursorrewind(struct ulfsmount *, struct quotakcursor *);
 144 int lfs_q2sync(struct mount *);
 145 int lfs_dq2get(struct vnode *, u_long, struct ulfsmount *, int, struct dquot *);
 146 int lfs_dq2sync(struct vnode *, struct dquot *);