2 * QUOTA An implementation of the diskquota system for the LINUX
3 * operating system. QUOTA is implemented using the BSD systemcall
4 * interface as the means of communication with the user level.
5 * Should work for all filesystems because of integration into the
6 * VFS layer of the operating system.
7 * This is based on the Melbourne quota system wich uses both user and
10 * This part does the lookup of the info.
12 * Version: $Id: rquota_server.c,v 2.9 1996/11/17 16:59:46 mvw Exp mvw $
14 * Author: Marco van Wieringen <mvw@planets.elm.net>
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
27 #include <sys/param.h>
28 #include <sys/quota.h>
37 #define TYPE_EXTENDED 0x01
40 #ifndef MNTTYPE_AUTOFS
41 #define MNTTYPE_AUTOFS "autofs"
45 * Global unix authentication credentials.
47 extern struct authunix_parms *unix_cred;
49 int in_group (gid_t *gids, u_int len, gid_t gid)
61 getquota_rslt *getquotainfo(int flags, caddr_t *argp, struct svc_req *rqstp)
63 static getquota_rslt result;
66 ext_getquota_args *ext_args;
71 char *pathname, *qfpathname;
72 int fd, err, id, type;
76 * First check authentication.
78 if (flags & TYPE_EXTENDED) {
79 arguments.ext_args = (ext_getquota_args *)argp;
80 id = arguments.ext_args->gqa_id;
81 type = arguments.ext_args->gqa_type;
82 pathname = arguments.ext_args->gqa_pathp;
84 if (type == USRQUOTA && unix_cred->aup_uid && unix_cred->aup_uid != id) {
85 result.status = Q_EPERM;
89 if (type == GRPQUOTA && unix_cred->aup_uid && unix_cred->aup_gid != id &&
90 !in_group((gid_t *)unix_cred->aup_gids, unix_cred->aup_len, id)) {
91 result.status = Q_EPERM;
95 arguments.args = (getquota_args *)argp;
96 id = arguments.args->gqa_uid;
98 pathname = arguments.args->gqa_pathp;
100 if (unix_cred->aup_uid && unix_cred->aup_uid != id) {
101 result.status = Q_EPERM;
106 fp = setmntent(MNTTAB, "r");
107 while ((mnt = getmntent(fp)) != (struct mntent *)0) {
108 if (strcasecmp (mnt->mnt_dir, pathname))
111 if (mnt->mnt_fsname [0] != '/'
112 || strcasecmp (mnt->mnt_type, MNTTYPE_NFS) == 0
113 || strcasecmp (mnt->mnt_type, MNTTYPE_AUTOFS) == 0
114 || strcasecmp (mnt->mnt_type, MNTTYPE_SWAP) == 0
115 || strcasecmp (mnt->mnt_type, MNTTYPE_IGNORE) == 0
116 || stat(pathname, &st) == -1)
120 result.getquota_rslt_u.gqr_rquota.rq_bsize = st.st_blksize;
122 /* All blocks reported are 512 Bytes blocks. */
123 result.getquota_rslt_u.gqr_rquota.rq_bsize = 512;
126 if (hasquota(mnt, type, &qfpathname)) {
127 if ((err = quotactl(QCMD(Q_GETQUOTA, type), mnt->mnt_fsname,
128 id, (caddr_t)&dq_dqb)) == -1
129 && !(flags & ACTIVE)) {
130 if ((fd = open(qfpathname, O_RDONLY)) < 0)
136 lseek(fd, (long) dqoff(id), L_SET);
137 switch (read(fd, &dq_dqb, sizeof(struct dqblk))) {
140 * Convert implicit 0 quota (EOF) into an
141 * explicit one (zero'ed dqblk)
143 memset((caddr_t)&dq_dqb, 0, sizeof(struct dqblk));
145 case sizeof(struct dqblk): /* OK */
155 if (err && (flags & ACTIVE)) {
156 result.status = Q_NOQUOTA;
160 result.status = Q_OK;
161 result.getquota_rslt_u.gqr_rquota.rq_active = (err == 0) ? TRUE : FALSE;
163 * Make a copy of the info into the last part of the remote quota
164 * struct which is exactly the same.
166 memcpy((caddr_t *)&result.getquota_rslt_u.gqr_rquota.rq_bhardlimit,
167 (caddr_t *)&dq_dqb, sizeof(struct dqblk));
174 result.status = Q_NOQUOTA;
178 getquota_rslt *rquotaproc_getquota_1(getquota_args *argp, struct svc_req *rqstp)
180 return(getquotainfo(0, (caddr_t *)argp, rqstp));
183 getquota_rslt *rquotaproc_getactivequota_1(getquota_args *argp, struct svc_req *rqstp)
185 return(getquotainfo(ACTIVE, (caddr_t *)argp, rqstp));
188 getquota_rslt *rquotaproc_getquota_2(ext_getquota_args *argp, struct svc_req *rqstp)
190 return(getquotainfo(TYPE_EXTENDED, (caddr_t *)argp, rqstp));
193 getquota_rslt *rquotaproc_getactivequota_2(ext_getquota_args *argp, struct svc_req *rqstp)
195 return(getquotainfo(TYPE_EXTENDED | ACTIVE, (caddr_t *)argp, rqstp));