Current Path : /sys/geom/label/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/geom/label/g_label_ntfs.c |
/*- * Copyright (c) 2005 Takanori Watanabe * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/geom/label/g_label_ntfs.c 199875 2009-11-28 11:57:43Z trasz $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <fs/ntfs/ntfs.h> #include <geom/geom.h> #include <geom/label/g_label.h> #define G_LABEL_NTFS_DIR "ntfs" static void g_label_ntfs_taste(struct g_consumer *cp, char *label, size_t size) { struct g_provider *pp; struct bootfile *bf; struct filerec *fr; struct attr *atr; off_t voloff; char *filerecp, *ap; char mftrecsz, vnchar; int recsize, j; g_topology_assert_not(); label[0] = '\0'; pp = cp->provider; filerecp = NULL; bf = (struct bootfile *)g_read_data(cp, 0, pp->sectorsize, NULL); if (bf == NULL || strncmp(bf->bf_sysid, "NTFS ", 8) != 0) goto done; mftrecsz = (char)bf->bf_mftrecsz; recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz); if (recsize % pp->sectorsize != 0) goto done; voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps + recsize * NTFS_VOLUMEINO; if (voloff % pp->sectorsize != 0) goto done; filerecp = g_read_data(cp, voloff, recsize, NULL); if (filerecp == NULL) goto done; fr = (struct filerec *)filerecp; if (fr->fr_fixup.fh_magic != NTFS_FILEMAGIC) goto done; for (ap = filerecp + fr->fr_attroff; atr = (struct attr *)ap, atr->a_hdr.a_type != -1; ap += atr->a_hdr.reclen) { if (atr->a_hdr.a_type == NTFS_A_VOLUMENAME) { if(atr->a_r.a_datalen >= size *2){ label[0] = 0; goto done; } /* *UNICODE to ASCII. * Should we need to use iconv(9)? */ for (j = 0; j < atr->a_r.a_datalen; j++) { vnchar = *(ap + atr->a_r.a_dataoff + j); if (j & 1) { if (vnchar) { label[0] = 0; goto done; } } else { label[j / 2] = vnchar; } } label[j / 2] = 0; break; } } done: if (bf != NULL) g_free(bf); if (filerecp != NULL) g_free(filerecp); } struct g_label_desc g_label_ntfs = { .ld_taste = g_label_ntfs_taste, .ld_dir = G_LABEL_NTFS_DIR, .ld_enabled = 1 }; G_LABEL_INIT(ntfs, g_label_ntfs, "Create device nodes for NTFS volumes");