1 /* $NetBSD: dtfs_vfsops.c,v 1.3 2012/11/04 23:37:02 christos Exp $ */
4 * Copyright (c) 2006 Antti Kantee. All Rights Reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * 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 the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/types.h>
29 #include <sys/resource.h>
44 rtstr(struct puffs_usermount *pu, const char *str, enum vtype vt)
46 struct puffs_node *pn = puffs_getroot(pu);
47 struct vattr *va = &pn->pn_va;
48 struct dtfs_file *df = DTFS_PTOF(pn);
51 if (sscanf(str, "%*s %256s", ltarg) != 1)
54 dtfs_baseattrs(va, vt, 2);
55 df->df_linktarget = estrdup(ltarg);
58 va->va_size = strlen(df->df_linktarget);
60 puffs_setrootinfo(pu, vt, 0, 0);
66 rtdev(struct puffs_usermount *pu, const char *str, enum vtype vt)
68 struct puffs_node *pn = puffs_getroot(pu);
69 struct vattr *va = &pn->pn_va;
72 if (sscanf(str, "%*s %d %d", &major, &minor) != 2)
75 dtfs_baseattrs(va, vt, 2);
77 va->va_rdev = makedev(major, minor);
80 va->va_mode |= S_IFBLK;
82 va->va_mode |= S_IFCHR;
84 puffs_setrootinfo(pu, vt, 0, va->va_rdev);
90 rtnorm(struct puffs_usermount *pu, const char *str, enum vtype vt)
92 struct puffs_node *pn = puffs_getroot(pu);
93 struct vattr *va = &pn->pn_va;
95 dtfs_baseattrs(va, vt, 2);
101 puffs_setrootinfo(pu, vt, 0, 0);
109 int (*pfunc)(struct puffs_usermount *, const char *, enum vtype);
111 { "reg", VREG, rtnorm },
112 { "dir", VDIR, rtnorm },
113 { "blk", VBLK, rtdev },
114 { "chr", VCHR, rtdev },
115 { "lnk", VLNK, rtstr },
116 { "sock", VSOCK, rtnorm },
117 { "fifo", VFIFO, rtnorm }
119 #define NTYPES (sizeof(rtypes) / sizeof(rtypes[0]))
122 dtfs_domount(struct puffs_usermount *pu, const char *typestr)
124 struct dtfs_mount *dtm;
125 struct dtfs_file *dff;
126 struct puffs_node *pn;
129 /* create mount-local thingie */
130 dtm = puffs_getspecific(pu);
131 dtm->dtm_nextfileid = 3;
134 LIST_INIT(&dtm->dtm_pollent);
137 * create root directory, do it "by hand" to avoid special-casing
141 dff->df_dotdot = NULL;
142 pn = puffs_pn_new(pu, dff);
144 errx(1, "puffs_newpnode");
145 puffs_setroot(pu, pn);
148 rtnorm(pu, NULL, VDIR);
150 for (i = 0; i < NTYPES; i++) {
151 if (strncmp(rtypes[i].tstr, typestr,
152 strlen(rtypes[i].tstr)) == 0) {
153 if (rtypes[i].pfunc(pu, typestr,
154 rtypes[i].vt) != 0) {
155 fprintf(stderr, "failed to parse "
156 "\"%s\"\n", typestr);
163 fprintf(stderr, "no maching type for %s\n", typestr);
172 * statvfs() should fill in the following members of struct statvfs:
174 * unsigned long f_bsize; file system block size
175 * unsigned long f_frsize; fundamental file system block size
176 * unsigned long f_iosize; optimal file system block size
177 * fsblkcnt_t f_blocks; number of blocks in file system,
178 * (in units of f_frsize)
180 * fsblkcnt_t f_bfree; free blocks avail in file system
181 * fsblkcnt_t f_bavail; free blocks avail to non-root
182 * fsblkcnt_t f_bresvd; blocks reserved for root
184 * fsfilcnt_t f_files; total file nodes in file system
185 * fsfilcnt_t f_ffree; free file nodes in file system
186 * fsfilcnt_t f_favail; free file nodes avail to non-root
187 * fsfilcnt_t f_fresvd; file nodes reserved for root
190 * The rest are filled in by the kernel.
192 #define ROUND(a,b) (((a) + ((b)-1)) & ~((b)-1))
193 #define NFILES 1024*1024
195 dtfs_fs_statvfs(struct puffs_usermount *pu, struct statvfs *sbp)
198 struct dtfs_mount *dtm;
202 dtm = puffs_getspecific(pu);
203 pgsize = getpagesize();
204 memset(sbp, 0, sizeof(struct statvfs));
207 * Use datasize rlimit as an _approximation_ for free size.
208 * This, of course, is not accurate due to overhead and not
209 * accounting for metadata.
211 if (getrlimit(RLIMIT_DATA, &rlim) == 0)
212 btot = rlim.rlim_cur;
215 bfree = btot - dtm->dtm_fsizes;
217 sbp->f_blocks = ROUND(btot, pgsize) / pgsize;
218 sbp->f_files = NFILES;
220 sbp->f_bsize = sbp->f_frsize = sbp->f_iosize = pgsize;
221 sbp->f_bfree = sbp->f_bavail = ROUND(bfree, pgsize) / pgsize;
222 sbp->f_ffree = sbp->f_favail = NFILES - dtm->dtm_nfiles;
224 sbp->f_bresvd = sbp->f_fresvd = 0;
231 addrcmp(struct puffs_usermount *pu, struct puffs_node *pn, void *arg)
241 dtfs_fs_fhtonode(struct puffs_usermount *pu, void *fid, size_t fidsize,
242 struct puffs_newinfo *pni)
244 struct dtfs_fid *dfid;
245 struct puffs_node *pn;
247 assert(fidsize == sizeof(struct dtfs_fid));
250 pn = puffs_pn_nodewalk(pu, addrcmp, dfid->dfid_addr);
254 if (pn->pn_va.va_fileid != dfid->dfid_fileid
255 || pn->pn_va.va_gen != dfid->dfid_gen)
258 puffs_newinfo_setcookie(pni, pn);
259 puffs_newinfo_setvtype(pni, pn->pn_va.va_type);
260 puffs_newinfo_setsize(pni, pn->pn_va.va_size);
261 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev);
267 dtfs_fs_nodetofh(struct puffs_usermount *pu, void *cookie,
268 void *fid, size_t *fidsize)
270 struct puffs_node *pn = cookie;
271 struct dtfs_fid *dfid;
272 extern int dynamicfh;
274 if (dynamicfh == 0) {
275 assert(*fidsize >= sizeof(struct dtfs_fid));
277 if (*fidsize < sizeof(struct dtfs_fid)) {
278 *fidsize = sizeof(struct dtfs_fid);
281 *fidsize = sizeof(struct dtfs_fid);
286 dfid->dfid_addr = pn;
287 dfid->dfid_fileid = pn->pn_va.va_fileid;
288 dfid->dfid_gen = pn->pn_va.va_gen;
294 dtfs_fs_unmount(struct puffs_usermount *pu, int flags)