static void
g_label_iso9660_taste(struct g_consumer *cp, char *label, size_t size)
{
	struct g_provider *pp;
	char *sector, *volume;
	int i;

	g_topology_assert_not();
	pp = cp->provider;
	label[0] = '\0';

	if ((ISO9660_OFFSET % pp->sectorsize) != 0)
		return;
	sector = (char *)g_read_data(cp, ISO9660_OFFSET, pp->sectorsize,
	    NULL);
	if (sector == NULL)
		return;
	if (bcmp(sector, ISO9660_MAGIC, sizeof(ISO9660_MAGIC) - 1) != 0) {
		g_free(sector);
		return;
	}
	G_LABEL_DEBUG(1, "ISO9660 file system detected on %s.", pp->name);
	volume = sector + 0x28;
	bzero(label, size);
	strlcpy(label, volume, MIN(size, VOLUME_LEN));
	g_free(sector);
	for (i = size - 1; i > 0; i--) {
		if (label[i] == '\0')
			continue;
		else if (label[i] == ' ')
			label[i] = '\0';
		else
			break;
	}
}
示例#2
0
void
g_waitidle(void)
{

	g_topology_assert_not();

	mtx_lock(&g_eventlock);
	while (!TAILQ_EMPTY(&g_events))
		msleep(&g_pending_events, &g_eventlock, PPAUSE,
		    "g_waitidle", hz/5);
	mtx_unlock(&g_eventlock);
	curthread->td_pflags &= ~TDP_GEOM;
}
示例#3
0
static void
g_label_ext2fs_taste(struct g_consumer *cp, char *label, size_t size)
{
	struct g_provider *pp;
	e2sb_t *fs;
	char *s_volume_name;

	g_topology_assert_not();
	pp = cp->provider;
	label[0] = '\0';

	if ((EXT2FS_SB_OFFSET % pp->sectorsize) != 0)
		return;

	fs = (e2sb_t *)g_read_data(cp, EXT2FS_SB_OFFSET, pp->sectorsize, NULL);
	if (fs == NULL)
		return;

	/* Check for magic and versio n*/
	if (fs->s_magic == EXT2_SUPER_MAGIC &&
	    fs->s_rev_level == EXT2_DYNAMIC_REV) {
		G_LABEL_DEBUG(1, "ext2fs file system detected on %s.",
		    pp->name);
	} else {
		goto exit_free;
	}

	s_volume_name = fs->s_volume_name;
	/* Terminate label */
	s_volume_name[sizeof(fs->s_volume_name) - 1] = '\0';

	if (s_volume_name[0] == '/')
		s_volume_name += 1;

	/* Check for volume label */
	if (s_volume_name[0] == '\0')
		goto exit_free;

	strlcpy(label, s_volume_name, size);

exit_free:
	g_free(fs);
}
示例#4
0
static void
g_label_reiserfs_taste(struct g_consumer *cp, char *label, size_t size)
{
	struct g_provider *pp;
	reiserfs_sb_t *fs;

	g_topology_assert_not();
	pp = cp->provider;
	label[0] = '\0';

	/* Try old format */
	fs = g_label_reiserfs_read_super(cp, REISERFS_OLD_DISK_OFFSET);
	if (fs == NULL) {
		/* Try new format */
		fs = g_label_reiserfs_read_super(cp, REISERFS_NEW_DISK_OFFSET);
	}
	if (fs == NULL)
		return;

	/* Check version */
	if (fs->s_version == 2) {
		G_LABEL_DEBUG(1, "reiserfs file system detected on %s.",
		    pp->name);
	} else {
		goto exit_free;
	}

	/* Check for volume label */
	if (fs->s_volume_name[0] == '\0')
		goto exit_free;

	/* Terminate label */
	fs->s_volume_name[sizeof(fs->s_volume_name) - 1] = '\0';
	strlcpy(label, fs->s_volume_name, size);

exit_free:
	g_free(fs);
}
示例#5
0
static void
g_label_msdosfs_taste(struct g_consumer *cp, char *label, size_t size)
{
	struct g_provider *pp;
	FAT_BSBPB *pfat_bsbpb;
	FAT32_BSBPB *pfat32_bsbpb;
	FAT_DES *pfat_entry;
	uint8_t *sector0, *sector;

	g_topology_assert_not();
	pp = cp->provider;
	sector0 = NULL;
	sector = NULL;
	bzero(label, size);

	/* Check if the sector size of the medium is a valid FAT sector size. */
	switch(pp->sectorsize) {
	case 512:
	case 1024:
	case 2048:
	case 4096:
		break;
	default:
		G_LABEL_DEBUG(1, "MSDOSFS: %s: sector size %d not compatible.",
		    pp->name, pp->sectorsize);
		return;
	}

	/* Load 1st sector with boot sector and boot parameter block. */
	sector0 = (uint8_t *)g_read_data(cp, 0, pp->sectorsize, NULL);
	if (sector0 == NULL)
		return;

	/* Check for the FAT boot sector signature. */
	if (sector0[510] != 0x55 || sector0[511] != 0xaa) {
		G_LABEL_DEBUG(1, "MSDOSFS: %s: no FAT signature found.",
		    pp->name);
		goto error;
	}


	/*
	 * Test if this is really a FAT volume and determine the FAT type.
	 */

	pfat_bsbpb = (FAT_BSBPB *)sector0;
	pfat32_bsbpb = (FAT32_BSBPB *)sector0;

	if (UINT16BYTES(pfat_bsbpb->BPB_FATSz16) != 0) {
		/*
		 * If the BPB_FATSz16 field is not zero and the string "FAT" is
		 * at the right place, this should be a FAT12 or FAT16 volume.
		 */
		if (strncmp(pfat_bsbpb->BS_FilSysType, "FAT", 3) != 0) {
			G_LABEL_DEBUG(1,
			    "MSDOSFS: %s: FAT12/16 volume not valid.",
			    pp->name);
			goto error;
		}
		G_LABEL_DEBUG(1, "MSDOSFS: %s: FAT12/FAT16 volume detected.",
		    pp->name);

		/* A volume with no name should have "NO NAME    " as label. */
		if (strncmp(pfat_bsbpb->BS_VolLab, LABEL_NO_NAME,
		    sizeof(pfat_bsbpb->BS_VolLab)) == 0) {
			G_LABEL_DEBUG(1,
			    "MSDOSFS: %s: FAT12/16 volume has no name.",
			    pp->name);
			goto error;
		}
		strlcpy(label, pfat_bsbpb->BS_VolLab,
		    MIN(size, sizeof(pfat_bsbpb->BS_VolLab) + 1));
	} else if (UINT32BYTES(pfat32_bsbpb->BPB_FATSz32) != 0) {
		uint32_t fat_FirstDataSector, fat_BytesPerSector, offset;

		/*
		 * If the BPB_FATSz32 field is not zero and the string "FAT" is
		 * at the right place, this should be a FAT32 volume.
		 */
		if (strncmp(pfat32_bsbpb->BS_FilSysType, "FAT", 3) != 0) {
			G_LABEL_DEBUG(1, "MSDOSFS: %s: FAT32 volume not valid.",
			    pp->name);
			goto error;
		}
		G_LABEL_DEBUG(1, "MSDOSFS: %s: FAT32 volume detected.",
		    pp->name);

		/*
		 * If the volume label is not "NO NAME    " we're done.
		 */
		if (strncmp(pfat32_bsbpb->BS_VolLab, LABEL_NO_NAME,
		    sizeof(pfat32_bsbpb->BS_VolLab)) != 0) {
			strlcpy(label, pfat32_bsbpb->BS_VolLab,
			    MIN(size, sizeof(pfat32_bsbpb->BS_VolLab) + 1));
			goto endofchecks;
		}

		/*
		 * If the volume label "NO NAME    " is in the boot sector, the
		 * label of FAT32 volumes may be stored as a special entry in
		 * the root directory.
		 */
		fat_FirstDataSector =
		    UINT16BYTES(pfat32_bsbpb->BPB_RsvdSecCnt) +
		    (pfat32_bsbpb->BPB_NumFATs *
		     UINT32BYTES(pfat32_bsbpb->BPB_FATSz32));
		fat_BytesPerSector = UINT16BYTES(pfat32_bsbpb->BPB_BytsPerSec);

		G_LABEL_DEBUG(2,
		    "MSDOSFS: FAT_FirstDataSector=0x%x, FAT_BytesPerSector=%d",
		    fat_FirstDataSector, fat_BytesPerSector);

		for (offset = fat_BytesPerSector * fat_FirstDataSector;;
		    offset += fat_BytesPerSector) {
			sector = (uint8_t *)g_read_data(cp, offset,
			    fat_BytesPerSector, NULL);
			if (sector == NULL)
				goto error;

			pfat_entry = (FAT_DES *)sector;
			do {
				/* No more entries available. */
				if (pfat_entry->DIR_Name[0] == 0) {
					G_LABEL_DEBUG(1, "MSDOSFS: %s: "
					    "FAT32 volume has no name.",
					    pp->name);
					goto error;
				}

				/* Skip empty or long name entries. */
				if (pfat_entry->DIR_Name[0] == 0xe5 ||
				    (pfat_entry->DIR_Attr &
				     FAT_DES_ATTR_LONG_NAME) ==
				    FAT_DES_ATTR_LONG_NAME) {
					continue;
				}

				/*
				 * The name of the entry is the volume label if
				 * ATTR_VOLUME_ID is set.
				 */
				if (pfat_entry->DIR_Attr &
				    FAT_DES_ATTR_VOLUME_ID) {
					strlcpy(label, pfat_entry->DIR_Name,
					    MIN(size,
					    sizeof(pfat_entry->DIR_Name) + 1));
					goto endofchecks;
				}
			} while((uint8_t *)(++pfat_entry) <
			    (uint8_t *)(sector + fat_BytesPerSector));
			g_free(sector);
		}
	} else {
		G_LABEL_DEBUG(1, "MSDOSFS: %s: no FAT volume detected.",
		    pp->name);
		goto error;
	}

endofchecks:
	g_label_rtrim(label, size);

error:
	if (sector0 != NULL)
		g_free(sector0);
	if (sector != NULL)
		g_free(sector);
}
示例#6
0
static void
g_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what)
{
	struct g_provider *pp;
	int sb, superblock;
	struct fs *fs;

	g_topology_assert_not();
	pp = cp->provider;
	label[0] = '\0';

	if (SBLOCKSIZE % cp->provider->sectorsize != 0)
		return;

	/*
	 * Walk through the standard places that superblocks hide and look
	 * for UFS magic. If we find magic, then check that the size in the
	 * superblock corresponds to the size of the underlying provider.
	 * Finally, look for a volume label and create an appropriate
	 * provider based on that.
	 */
	for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
		/*
		 * Take care not to issue an invalid I/O request. The offset of
		 * the superblock candidate must be multiples of the provider's
		 * sector size, otherwise an FFS can't exist on the provider
		 * anyway.
		 */
		if (superblock % cp->provider->sectorsize != 0)
			continue;

		fs = (struct fs *)g_read_data(cp, superblock, SBLOCKSIZE, NULL);
		if (fs == NULL)
			continue;
		/* Check for magic */
		if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0) {
		    	/* Valid UFS1. */
		} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0) {
		    	/* Valid UFS2. */
		} else {
			g_free(fs);
			continue;
		}
		if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 ||
		    fs->fs_bsize < MINBSIZE ||
		    fs->fs_bsize < sizeof(struct fs)) {
			g_free(fs);
			continue;
		}
		G_LABEL_DEBUG(1, "%s file system detected on %s.",
		    fs->fs_magic == FS_UFS1_MAGIC ? "UFS1" : "UFS2", pp->name);
		switch (what) {
		case G_LABEL_UFS_VOLUME:
			/* Check for volume label */
			if (fs->fs_volname[0] == '\0') {
				g_free(fs);
				continue;
			}
			strlcpy(label, fs->fs_volname, size);
			break;
		case G_LABEL_UFS_ID:
			if (fs->fs_id[0] == 0 && fs->fs_id[1] == 0) {
				g_free(fs);
				continue;
			}
			snprintf(label, size, "%08x%08x", fs->fs_id[0],
			    fs->fs_id[1]);
			break;
		}
		g_free(fs);
		break;
	}
}
示例#7
0
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);
}