2 * Copyright (c) 2011 François Tigeot <ftigeot@wolpond.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
15 * 3. Neither the name of The DragonFly Project nor the names of its
16 * contributors may be used to endorse or promote products derived
17 * from this software without specific, prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/sysctl.h>
34 #include <sys/mount.h>
35 #include <sys/systm.h>
36 #include <sys/nlookup.h>
37 #include <sys/vnode.h>
39 #include <sys/vfs_quota.h>
40 #include <sys/spinlock.h>
41 #include <sys/spinlock2.h>
44 #include <sys/sysproto.h>
45 #include <libprop/proplib.h>
46 #include <libprop/prop_dictionary.h>
48 /* in-memory accounting, red-black tree based */
49 /* FIXME: code duplication caused by uid_t / gid_t differences */
50 RB_PROTOTYPE(ac_utree, ac_unode, rb_entry, rb_ac_unode_cmp);
51 RB_PROTOTYPE(ac_gtree, ac_gnode, rb_entry, rb_ac_gnode_cmp);
54 rb_ac_unode_cmp(struct ac_unode *a, struct ac_unode *b);
56 rb_ac_gnode_cmp(struct ac_gnode *a, struct ac_gnode *b);
58 RB_GENERATE(ac_utree, ac_unode, rb_entry, rb_ac_unode_cmp);
59 RB_GENERATE(ac_gtree, ac_gnode, rb_entry, rb_ac_gnode_cmp);
61 struct ac_unode* unode_insert(struct mount*, uid_t);
62 struct ac_gnode* gnode_insert(struct mount*, gid_t);
65 rb_ac_unode_cmp(struct ac_unode *a, struct ac_unode *b)
67 if (a->left_bits < b->left_bits)
69 else if (a->left_bits > b->left_bits)
75 rb_ac_gnode_cmp(struct ac_gnode *a, struct ac_gnode *b)
77 if (a->left_bits < b->left_bits)
79 else if (a->left_bits > b->left_bits)
85 unode_insert(struct mount *mp, uid_t uid)
87 struct ac_unode *unp, *res;
89 unp = kmalloc(sizeof(struct ac_unode), M_MOUNT, M_ZERO | M_WAITOK);
91 unp->left_bits = (uid >> ACCT_CHUNK_BITS);
92 res = RB_INSERT(ac_utree, &mp->mnt_acct.ac_uroot, unp);
93 KASSERT(res == NULL, ("unode_insert(): RB_INSERT didn't return NULL\n"));
99 gnode_insert(struct mount *mp, gid_t gid)
101 struct ac_gnode *gnp, *res;
103 gnp = kmalloc(sizeof(struct ac_gnode), M_MOUNT, M_ZERO | M_WAITOK);
105 gnp->left_bits = (gid >> ACCT_CHUNK_BITS);
106 res = RB_INSERT(ac_gtree, &mp->mnt_acct.ac_groot, gnp);
107 KASSERT(res == NULL, ("gnode_insert(): RB_INSERT didn't return NULL\n"));
112 static int vfs_accounting_enabled = 0; /* global vfs accounting enable */
113 TUNABLE_INT("vfs.accounting_enabled", &vfs_accounting_enabled);
114 SYSCTL_INT(_vfs, OID_AUTO, accounting_enabled, CTLFLAG_RD,
115 &vfs_accounting_enabled, 0, "Enable VFS accounting");
117 /* initializes global accounting data */
119 vq_init(struct mount *mp) {
121 if (!vfs_accounting_enabled)
124 /* initialize the rb trees */
125 RB_INIT(&mp->mnt_acct.ac_uroot);
126 RB_INIT(&mp->mnt_acct.ac_groot);
127 spin_init(&mp->mnt_acct.ac_spin);
129 mp->mnt_acct.ac_bytes = 0;
131 /* enable data collection */
132 mp->mnt_op->vfs_account = vfs_stdaccount;
133 /* mark this filesystem as having accounting enabled */
134 mp->mnt_flag |= MNT_ACCOUNTING;
136 kprintf("vfs accounting enabled for %s\n",
137 mp->mnt_stat.f_mntonname);
142 vq_done(struct mount *mp) {
143 /* TODO: remove the rb trees here */
147 vfs_stdaccount(struct mount *mp, uid_t uid, gid_t gid, int64_t delta)
149 struct ac_unode ufind, *unp;
150 struct ac_gnode gfind, *gnp;
152 /* find or create address of chunk */
153 ufind.left_bits = (uid >> ACCT_CHUNK_BITS);
154 gfind.left_bits = (gid >> ACCT_CHUNK_BITS);
156 spin_lock(&mp->mnt_acct.ac_spin);
158 mp->mnt_acct.ac_bytes += delta;
160 if ((unp = RB_FIND(ac_utree, &mp->mnt_acct.ac_uroot, &ufind)) == NULL)
161 unp = unode_insert(mp, uid);
162 if ((gnp = RB_FIND(ac_gtree, &mp->mnt_acct.ac_groot, &gfind)) == NULL)
163 gnp = gnode_insert(mp, gid);
165 /* update existing chunk */
166 unp->uid_chunk[(uid & ACCT_CHUNK_MASK)] += delta;
167 gnp->gid_chunk[(gid & ACCT_CHUNK_MASK)] += delta;
169 spin_unlock(&mp->mnt_acct.ac_spin);
173 cmd_get_usage_all(struct mount *mp, prop_array_t dict_out) {
174 struct ac_unode *unp;
175 struct ac_gnode *gnp;
177 prop_dictionary_t item;
179 item = prop_dictionary_create();
180 (void) prop_dictionary_set_uint64(item, "space used", mp->mnt_acct.ac_bytes);
181 prop_array_add_and_rel(dict_out, item);
183 RB_FOREACH(unp, ac_utree, &mp->mnt_acct.ac_uroot) {
184 for (i=0; i<ACCT_CHUNK_NIDS; i++) {
185 if (unp->uid_chunk[i] != 0) {
186 item = prop_dictionary_create();
187 (void) prop_dictionary_set_uint32(item, "uid",
188 (unp->left_bits << ACCT_CHUNK_BITS) + i);
189 (void) prop_dictionary_set_uint64(item, "space used",
191 prop_array_add_and_rel(dict_out, item);
196 RB_FOREACH(gnp, ac_gtree, &mp->mnt_acct.ac_groot) {
197 for (i=0; i<ACCT_CHUNK_NIDS; i++) {
198 if (gnp->gid_chunk[i] != 0) {
199 item = prop_dictionary_create();
200 (void) prop_dictionary_set_uint32(item, "gid",
201 (gnp->left_bits << ACCT_CHUNK_BITS) + i);
202 (void) prop_dictionary_set_uint64(item, "space used",
204 prop_array_add_and_rel(dict_out, item);
211 sys_vquotactl(struct vquotactl_args *vqa)
212 /* const char *path, struct plistref *pref */
215 struct plistref pref;
216 prop_dictionary_t dict, args;
221 struct nlookupdata nd;
226 error = copyin(vqa->pref, &pref, sizeof(pref));
227 error = prop_dictionary_copyin(&pref, &dict);
231 /* we have a path, get its mount point */
232 error = nlookup_init(&nd, path, UIO_USERSPACE, 0);
235 error = nlookup(&nd);
238 mp = nd.nl_nch.mount;
241 /* get the command */
242 if (prop_dictionary_get_cstring(dict, "command", &cmd) == 0) {
243 kprintf("sys_vquotactl(): couldn't get command\n");
246 args = prop_dictionary_get(dict, "arguments");
248 kprintf("couldn't get arguments\n");
252 pa_out = prop_array_create();
256 if (strcmp(cmd, "get usage all") == 0) {
257 cmd_get_usage_all(mp, pa_out);
263 /* kernel to userland */
264 dict = prop_dictionary_create();
265 error = prop_dictionary_set(dict, "get usage all", pa_out);
267 error = prop_dictionary_copyout(&pref, dict);
268 error = copyout(&pref, vqa->pref, sizeof(pref));