2 * Copyright (c) 2011 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Antonio Huete <tuxillo@quantumachine.net>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 #include <sys/param.h>
46 #include "libhammer.h"
49 libhammer_get_fsinfo(const char *path)
51 struct hammer_pseudofs_data *pfs_od;
52 struct hammer_ioc_pseudofs_rw pfs;
53 struct hammer_ioc_info info;
54 libhammer_pfsinfo_t pip;
55 libhammer_fsinfo_t fip;
59 if ((fd = open(path, O_RDONLY)) < 0)
62 fip = _libhammer_malloc(sizeof(*fip));
63 TAILQ_INIT(&fip->list_pseudo);
64 if ((ioctl(fd, HAMMERIOC_GET_INFO, &info)) < 0) {
65 libhammer_free_fsinfo(fip);
70 /* Fill filesystem information */
71 snprintf(fip->vol_name, TXTLEN, "%s", info.vol_label);
72 fip->vol_fsid = info.vol_fsid;
73 fip->version = info.version;
74 fip->nvolumes = info.nvolumes;
75 fip->rootvol = info.rootvol;
76 fip->inodes = info.inodes;
77 fip->bigblocks = info.bigblocks;
78 fip->freebigblocks = info.freebigblocks;
79 fip->rsvbigblocks = info.rsvbigblocks;
81 bzero(&pfs, sizeof(pfs));
82 pfs.pfs_id = 0; /* start off with root PFS */
83 pfs.ondisk = _libhammer_malloc(sizeof(*pfs_od));
84 pfs.bytes = sizeof(struct hammer_pseudofs_data);
87 error = ioctl(fd, HAMMERIOC_SCAN_PSEUDOFS, &pfs);
88 if (error == 0 && !hammer_is_pfs_deleted(pfs.ondisk)) {
89 pip = _libhammer_malloc(sizeof(*pip));
91 pip->ismaster = hammer_is_pfs_master(pfs_od);
94 * Fill in structs used in the library. We don't rely on
95 * HAMMER structs but we do fill our own.
97 pip->version = fip->version;
98 pip->pfs_id = pfs.pfs_id;
99 pip->mirror_flags = pfs_od->mirror_flags;
100 pip->beg_tid = pfs_od->sync_beg_tid;
101 pip->end_tid = pfs_od->sync_end_tid;
103 libhammer_find_pfs_mount(&pfs_od->unique_uuid);
104 if (fip->version < 3) {
105 libhammer_compat_old_snapcount(pip);
107 TAILQ_INIT(&pip->list_snap);
108 if (libhammer_pfs_get_snapshots(fip, pip) < 0)
113 * PFS retrieval goes 0..n so inserting in the tail
114 * leaves the TAILQ sorted by pfs_id.
115 * This is important since quickly getting PFS #0 is
116 * required for some functions so *DO NOT CHANGE IT*.
118 TAILQ_INSERT_TAIL(&fip->list_pseudo, pip, entries);
131 libhammer_free_fsinfo(libhammer_fsinfo_t fip)
133 struct libhammer_pfsinfo *pfstmp;
135 while(!TAILQ_EMPTY(&fip->list_pseudo)) {
136 pfstmp = TAILQ_FIRST(&fip->list_pseudo);
137 libhammer_pfs_free_snapshots(pfstmp);
138 if (pfstmp->mountedon)
139 free(pfstmp->mountedon);
140 TAILQ_REMOVE(&fip->list_pseudo, pfstmp, entries);