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Diffstat (limited to 'release/src/router/busybox/e2fsprogs/old_e2fsprogs/blkid/probe.c')
-rw-r--r--release/src/router/busybox/e2fsprogs/old_e2fsprogs/blkid/probe.c721
1 files changed, 721 insertions, 0 deletions
diff --git a/release/src/router/busybox/e2fsprogs/old_e2fsprogs/blkid/probe.c b/release/src/router/busybox/e2fsprogs/old_e2fsprogs/blkid/probe.c
new file mode 100644
index 00000000..1f7188e6
--- /dev/null
+++ b/release/src/router/busybox/e2fsprogs/old_e2fsprogs/blkid/probe.c
@@ -0,0 +1,721 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * probe.c - identify a block device by its contents, and return a dev
+ * struct with the details
+ *
+ * Copyright (C) 1999 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * Copyright (C) 2001 by Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_MKDEV_H
+#include <sys/mkdev.h>
+#endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include "blkidP.h"
+#include "../uuid/uuid.h"
+#include "probe.h"
+
+/*
+ * This is a special case code to check for an MDRAID device. We do
+ * this special since it requires checking for a superblock at the end
+ * of the device.
+ */
+static int check_mdraid(int fd, unsigned char *ret_uuid)
+{
+ struct mdp_superblock_s *md;
+ blkid_loff_t offset;
+ char buf[4096];
+
+ if (fd < 0)
+ return -BLKID_ERR_PARAM;
+
+ offset = (blkid_get_dev_size(fd) & ~((blkid_loff_t)65535)) - 65536;
+
+ if (blkid_llseek(fd, offset, 0) < 0 ||
+ read(fd, buf, 4096) != 4096)
+ return -BLKID_ERR_IO;
+
+ /* Check for magic number */
+ if (memcmp("\251+N\374", buf, 4))
+ return -BLKID_ERR_PARAM;
+
+ if (!ret_uuid)
+ return 0;
+ *ret_uuid = 0;
+
+ /* The MD UUID is not contiguous in the superblock, make it so */
+ md = (struct mdp_superblock_s *)buf;
+ if (md->set_uuid0 || md->set_uuid1 || md->set_uuid2 || md->set_uuid3) {
+ memcpy(ret_uuid, &md->set_uuid0, 4);
+ memcpy(ret_uuid, &md->set_uuid1, 12);
+ }
+ return 0;
+}
+
+static void set_uuid(blkid_dev dev, uuid_t uuid)
+{
+ char str[37];
+
+ if (!uuid_is_null(uuid)) {
+ uuid_unparse(uuid, str);
+ blkid_set_tag(dev, "UUID", str, sizeof(str));
+ }
+}
+
+static void get_ext2_info(blkid_dev dev, unsigned char *buf)
+{
+ struct ext2_super_block *es = (struct ext2_super_block *) buf;
+ const char *label = 0;
+
+ DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n",
+ blkid_le32(es->s_feature_compat),
+ blkid_le32(es->s_feature_incompat),
+ blkid_le32(es->s_feature_ro_compat)));
+
+ if (strlen(es->s_volume_name))
+ label = es->s_volume_name;
+ blkid_set_tag(dev, "LABEL", label, sizeof(es->s_volume_name));
+
+ set_uuid(dev, es->s_uuid);
+}
+
+static int probe_ext3(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ext2_super_block *es;
+
+ es = (struct ext2_super_block *)buf;
+
+ /* Distinguish between jbd and ext2/3 fs */
+ if (blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+ return -BLKID_ERR_PARAM;
+
+ /* Distinguish between ext3 and ext2 */
+ if (!(blkid_le32(es->s_feature_compat) &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL))
+ return -BLKID_ERR_PARAM;
+
+ get_ext2_info(dev, buf);
+
+ blkid_set_tag(dev, "SEC_TYPE", "ext2", sizeof("ext2"));
+
+ return 0;
+}
+
+static int probe_ext2(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ext2_super_block *es;
+
+ es = (struct ext2_super_block *)buf;
+
+ /* Distinguish between jbd and ext2/3 fs */
+ if (blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+ return -BLKID_ERR_PARAM;
+
+ get_ext2_info(dev, buf);
+
+ return 0;
+}
+
+static int probe_jbd(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ext2_super_block *es = (struct ext2_super_block *) buf;
+
+ if (!(blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
+ return -BLKID_ERR_PARAM;
+
+ get_ext2_info(dev, buf);
+
+ return 0;
+}
+
+static int probe_vfat(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct vfat_super_block *vs;
+ char serno[10];
+ const char *label = 0;
+ int label_len = 0;
+
+ vs = (struct vfat_super_block *)buf;
+
+ if (strncmp(vs->vs_label, "NO NAME", 7)) {
+ char *end = vs->vs_label + sizeof(vs->vs_label) - 1;
+
+ while (*end == ' ' && end >= vs->vs_label)
+ --end;
+ if (end >= vs->vs_label) {
+ label = vs->vs_label;
+ label_len = end - vs->vs_label + 1;
+ }
+ }
+
+ /* We can't just print them as %04X, because they are unaligned */
+ sprintf(serno, "%02X%02X-%02X%02X", vs->vs_serno[3], vs->vs_serno[2],
+ vs->vs_serno[1], vs->vs_serno[0]);
+ blkid_set_tag(dev, "LABEL", label, label_len);
+ blkid_set_tag(dev, "UUID", serno, sizeof(serno));
+
+ return 0;
+}
+
+static int probe_msdos(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct msdos_super_block *ms = (struct msdos_super_block *) buf;
+ char serno[10];
+ const char *label = 0;
+ int label_len = 0;
+
+ if (strncmp(ms->ms_label, "NO NAME", 7)) {
+ char *end = ms->ms_label + sizeof(ms->ms_label) - 1;
+
+ while (*end == ' ' && end >= ms->ms_label)
+ --end;
+ if (end >= ms->ms_label) {
+ label = ms->ms_label;
+ label_len = end - ms->ms_label + 1;
+ }
+ }
+
+ /* We can't just print them as %04X, because they are unaligned */
+ sprintf(serno, "%02X%02X-%02X%02X", ms->ms_serno[3], ms->ms_serno[2],
+ ms->ms_serno[1], ms->ms_serno[0]);
+ blkid_set_tag(dev, "UUID", serno, 0);
+ blkid_set_tag(dev, "LABEL", label, label_len);
+ blkid_set_tag(dev, "SEC_TYPE", "msdos", sizeof("msdos"));
+
+ return 0;
+}
+
+static int probe_xfs(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct xfs_super_block *xs;
+ const char *label = 0;
+
+ xs = (struct xfs_super_block *)buf;
+
+ if (strlen(xs->xs_fname))
+ label = xs->xs_fname;
+ blkid_set_tag(dev, "LABEL", label, sizeof(xs->xs_fname));
+ set_uuid(dev, xs->xs_uuid);
+ return 0;
+}
+
+static int probe_reiserfs(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id, unsigned char *buf)
+{
+ struct reiserfs_super_block *rs = (struct reiserfs_super_block *) buf;
+ unsigned int blocksize;
+ const char *label = 0;
+
+ blocksize = blkid_le16(rs->rs_blocksize);
+
+ /* If the superblock is inside the journal, we have the wrong one */
+ if (id->bim_kboff/(blocksize>>10) > blkid_le32(rs->rs_journal_block))
+ return -BLKID_ERR_BIG;
+
+ /* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */
+ if (!strcmp(id->bim_magic, "ReIsEr2Fs") ||
+ !strcmp(id->bim_magic, "ReIsEr3Fs")) {
+ if (strlen(rs->rs_label))
+ label = rs->rs_label;
+ set_uuid(dev, rs->rs_uuid);
+ }
+ blkid_set_tag(dev, "LABEL", label, sizeof(rs->rs_label));
+
+ return 0;
+}
+
+static int probe_jfs(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct jfs_super_block *js;
+ const char *label = 0;
+
+ js = (struct jfs_super_block *)buf;
+
+ if (strlen((char *) js->js_label))
+ label = (char *) js->js_label;
+ blkid_set_tag(dev, "LABEL", label, sizeof(js->js_label));
+ set_uuid(dev, js->js_uuid);
+ return 0;
+}
+
+static int probe_romfs(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct romfs_super_block *ros;
+ const char *label = 0;
+
+ ros = (struct romfs_super_block *)buf;
+
+ if (strlen((char *) ros->ros_volume))
+ label = (char *) ros->ros_volume;
+ blkid_set_tag(dev, "LABEL", label, 0);
+ return 0;
+}
+
+static int probe_cramfs(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct cramfs_super_block *csb;
+ const char *label = 0;
+
+ csb = (struct cramfs_super_block *)buf;
+
+ if (strlen((char *) csb->name))
+ label = (char *) csb->name;
+ blkid_set_tag(dev, "LABEL", label, 0);
+ return 0;
+}
+
+static int probe_swap0(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf __BLKID_ATTR((unused)))
+{
+ blkid_set_tag(dev, "UUID", 0, 0);
+ blkid_set_tag(dev, "LABEL", 0, 0);
+ return 0;
+}
+
+static int probe_swap1(int fd,
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf __BLKID_ATTR((unused)))
+{
+ struct swap_id_block *sws;
+
+ probe_swap0(fd, cache, dev, id, buf);
+ /*
+ * Version 1 swap headers are always located at offset of 1024
+ * bytes, although the swap signature itself is located at the
+ * end of the page (which may vary depending on hardware
+ * pagesize).
+ */
+ if (lseek(fd, 1024, SEEK_SET) < 0) return 1;
+ sws = xmalloc(1024);
+ if (read(fd, sws, 1024) != 1024) {
+ free(sws);
+ return 1;
+ }
+
+ /* arbitrary sanity check.. is there any garbage down there? */
+ if (sws->sws_pad[32] == 0 && sws->sws_pad[33] == 0) {
+ if (sws->sws_volume[0])
+ blkid_set_tag(dev, "LABEL", (const char*)sws->sws_volume,
+ sizeof(sws->sws_volume));
+ if (sws->sws_uuid[0])
+ set_uuid(dev, sws->sws_uuid);
+ }
+ free(sws);
+
+ return 0;
+}
+
+static const char
+* const udf_magic[] = { "BEA01", "BOOT2", "CD001", "CDW02", "NSR02",
+ "NSR03", "TEA01", 0 };
+
+static int probe_udf(int fd, blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev __BLKID_ATTR((unused)),
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf __BLKID_ATTR((unused)))
+{
+ int j, bs;
+ struct iso_volume_descriptor isosb;
+ const char *const *m;
+
+ /* determine the block size by scanning in 2K increments
+ (block sizes larger than 2K will be null padded) */
+ for (bs = 1; bs < 16; bs++) {
+ lseek(fd, bs*2048+32768, SEEK_SET);
+ if (read(fd, (char *)&isosb, sizeof(isosb)) != sizeof(isosb))
+ return 1;
+ if (isosb.id[0])
+ break;
+ }
+
+ /* Scan up to another 64 blocks looking for additional VSD's */
+ for (j = 1; j < 64; j++) {
+ if (j > 1) {
+ lseek(fd, j*bs*2048+32768, SEEK_SET);
+ if (read(fd, (char *)&isosb, sizeof(isosb))
+ != sizeof(isosb))
+ return 1;
+ }
+ /* If we find NSR0x then call it udf:
+ NSR01 for UDF 1.00
+ NSR02 for UDF 1.50
+ NSR03 for UDF 2.00 */
+ if (!strncmp(isosb.id, "NSR0", 4))
+ return 0;
+ for (m = udf_magic; *m; m++)
+ if (!strncmp(*m, isosb.id, 5))
+ break;
+ if (*m == 0)
+ return 1;
+ }
+ return 1;
+}
+
+static int probe_ocfs(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ocfs_volume_header ovh;
+ struct ocfs_volume_label ovl;
+ __u32 major;
+
+ memcpy(&ovh, buf, sizeof(ovh));
+ memcpy(&ovl, buf+512, sizeof(ovl));
+
+ major = ocfsmajor(ovh);
+ if (major == 1)
+ blkid_set_tag(dev, "SEC_TYPE", "ocfs1", sizeof("ocfs1"));
+ else if (major >= 9)
+ blkid_set_tag(dev, "SEC_TYPE", "ntocfs", sizeof("ntocfs"));
+
+ blkid_set_tag(dev, "LABEL", (const char*)ovl.label, ocfslabellen(ovl));
+ blkid_set_tag(dev, "MOUNT", (const char*)ovh.mount, ocfsmountlen(ovh));
+ set_uuid(dev, ovl.vol_id);
+ return 0;
+}
+
+static int probe_ocfs2(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ocfs2_super_block *osb;
+
+ osb = (struct ocfs2_super_block *)buf;
+
+ blkid_set_tag(dev, "LABEL", (const char*)osb->s_label, sizeof(osb->s_label));
+ set_uuid(dev, osb->s_uuid);
+ return 0;
+}
+
+static int probe_oracleasm(int fd __BLKID_ATTR((unused)),
+ blkid_cache cache __BLKID_ATTR((unused)),
+ blkid_dev dev,
+ const struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct oracle_asm_disk_label *dl;
+
+ dl = (struct oracle_asm_disk_label *)buf;
+
+ blkid_set_tag(dev, "LABEL", dl->dl_id, sizeof(dl->dl_id));
+ return 0;
+}
+
+/*
+ * BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined
+ * in the type_array table below + bim_kbalign.
+ *
+ * When probing for a lot of magics, we handle everything in 1kB buffers so
+ * that we don't have to worry about reading each combination of block sizes.
+ */
+#define BLKID_BLK_OFFS 64 /* currently reiserfs */
+
+/*
+ * Various filesystem magics that we can check for. Note that kboff and
+ * sboff are in kilobytes and bytes respectively. All magics are in
+ * byte strings so we don't worry about endian issues.
+ */
+static const struct blkid_magic type_array[] = {
+/* type kboff sboff len magic probe */
+ { "oracleasm", 0, 32, 8, "ORCLDISK", probe_oracleasm },
+ { "ntfs", 0, 3, 8, "NTFS ", 0 },
+ { "jbd", 1, 0x38, 2, "\123\357", probe_jbd },
+ { "ext3", 1, 0x38, 2, "\123\357", probe_ext3 },
+ { "ext2", 1, 0x38, 2, "\123\357", probe_ext2 },
+ { "reiserfs", 8, 0x34, 8, "ReIsErFs", probe_reiserfs },
+ { "reiserfs", 64, 0x34, 9, "ReIsEr2Fs", probe_reiserfs },
+ { "reiserfs", 64, 0x34, 9, "ReIsEr3Fs", probe_reiserfs },
+ { "reiserfs", 64, 0x34, 8, "ReIsErFs", probe_reiserfs },
+ { "reiserfs", 8, 20, 8, "ReIsErFs", probe_reiserfs },
+ { "vfat", 0, 0x52, 5, "MSWIN", probe_vfat },
+ { "vfat", 0, 0x52, 8, "FAT32 ", probe_vfat },
+ { "vfat", 0, 0x36, 5, "MSDOS", probe_msdos },
+ { "vfat", 0, 0x36, 8, "FAT16 ", probe_msdos },
+ { "vfat", 0, 0x36, 8, "FAT12 ", probe_msdos },
+ { "minix", 1, 0x10, 2, "\177\023", 0 },
+ { "minix", 1, 0x10, 2, "\217\023", 0 },
+ { "minix", 1, 0x10, 2, "\150\044", 0 },
+ { "minix", 1, 0x10, 2, "\170\044", 0 },
+ { "vxfs", 1, 0, 4, "\365\374\001\245", 0 },
+ { "xfs", 0, 0, 4, "XFSB", probe_xfs },
+ { "romfs", 0, 0, 8, "-rom1fs-", probe_romfs },
+ { "bfs", 0, 0, 4, "\316\372\173\033", 0 },
+ { "cramfs", 0, 0, 4, "E=\315\050", probe_cramfs },
+ { "qnx4", 0, 4, 6, "QNX4FS", 0 },
+ { "udf", 32, 1, 5, "BEA01", probe_udf },
+ { "udf", 32, 1, 5, "BOOT2", probe_udf },
+ { "udf", 32, 1, 5, "CD001", probe_udf },
+ { "udf", 32, 1, 5, "CDW02", probe_udf },
+ { "udf", 32, 1, 5, "NSR02", probe_udf },
+ { "udf", 32, 1, 5, "NSR03", probe_udf },
+ { "udf", 32, 1, 5, "TEA01", probe_udf },
+ { "iso9660", 32, 1, 5, "CD001", 0 },
+ { "iso9660", 32, 9, 5, "CDROM", 0 },
+ { "jfs", 32, 0, 4, "JFS1", probe_jfs },
+ { "hfs", 1, 0, 2, "BD", 0 },
+ { "ufs", 8, 0x55c, 4, "T\031\001\000", 0 },
+ { "hpfs", 8, 0, 4, "I\350\225\371", 0 },
+ { "sysv", 0, 0x3f8, 4, "\020~\030\375", 0 },
+ { "swap", 0, 0xff6, 10, "SWAP-SPACE", probe_swap0 },
+ { "swap", 0, 0xff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swap", 0, 0x1ff6, 10, "SWAP-SPACE", probe_swap0 },
+ { "swap", 0, 0x1ff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swap", 0, 0x3ff6, 10, "SWAP-SPACE", probe_swap0 },
+ { "swap", 0, 0x3ff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swap", 0, 0x7ff6, 10, "SWAP-SPACE", probe_swap0 },
+ { "swap", 0, 0x7ff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swap", 0, 0xfff6, 10, "SWAP-SPACE", probe_swap0 },
+ { "swap", 0, 0xfff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "ocfs", 0, 8, 9, "OracleCFS", probe_ocfs },
+ { "ocfs2", 1, 0, 6, "OCFSV2", probe_ocfs2 },
+ { "ocfs2", 2, 0, 6, "OCFSV2", probe_ocfs2 },
+ { "ocfs2", 4, 0, 6, "OCFSV2", probe_ocfs2 },
+ { "ocfs2", 8, 0, 6, "OCFSV2", probe_ocfs2 },
+ { NULL, 0, 0, 0, NULL, NULL }
+};
+
+/*
+ * Verify that the data in dev is consistent with what is on the actual
+ * block device (using the devname field only). Normally this will be
+ * called when finding items in the cache, but for long running processes
+ * is also desirable to revalidate an item before use.
+ *
+ * If we are unable to revalidate the data, we return the old data and
+ * do not set the BLKID_BID_FL_VERIFIED flag on it.
+ */
+blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev)
+{
+ const struct blkid_magic *id;
+ unsigned char *bufs[BLKID_BLK_OFFS + 1], *buf;
+ const char *type;
+ struct stat st;
+ time_t diff, now;
+ int fd, idx;
+
+ if (!dev)
+ return NULL;
+
+ now = time(NULL);
+ diff = now - dev->bid_time;
+
+ if ((now < dev->bid_time) ||
+ (diff < BLKID_PROBE_MIN) ||
+ (dev->bid_flags & BLKID_BID_FL_VERIFIED &&
+ diff < BLKID_PROBE_INTERVAL))
+ return dev;
+
+ DBG(DEBUG_PROBE,
+ printf("need to revalidate %s (time since last check %lu)\n",
+ dev->bid_name, diff));
+
+ if (((fd = open(dev->bid_name, O_RDONLY)) < 0) ||
+ (fstat(fd, &st) < 0)) {
+ if (errno == ENXIO || errno == ENODEV || errno == ENOENT) {
+ blkid_free_dev(dev);
+ return NULL;
+ }
+ /* We don't have read permission, just return cache data. */
+ DBG(DEBUG_PROBE,
+ printf("returning unverified data for %s\n",
+ dev->bid_name));
+ return dev;
+ }
+
+ memset(bufs, 0, sizeof(bufs));
+
+ /*
+ * Iterate over the type array. If we already know the type,
+ * then try that first. If it doesn't work, then blow away
+ * the type information, and try again.
+ *
+ */
+try_again:
+ type = 0;
+ if (!dev->bid_type || !strcmp(dev->bid_type, "mdraid")) {
+ uuid_t uuid;
+
+ if (check_mdraid(fd, uuid) == 0) {
+ set_uuid(dev, uuid);
+ type = "mdraid";
+ goto found_type;
+ }
+ }
+ for (id = type_array; id->bim_type; id++) {
+ if (dev->bid_type &&
+ strcmp(id->bim_type, dev->bid_type))
+ continue;
+
+ idx = id->bim_kboff + (id->bim_sboff >> 10);
+ if (idx > BLKID_BLK_OFFS || idx < 0)
+ continue;
+ buf = bufs[idx];
+ if (!buf) {
+ if (lseek(fd, idx << 10, SEEK_SET) < 0)
+ continue;
+
+ buf = xmalloc(1024);
+
+ if (read(fd, buf, 1024) != 1024) {
+ free(buf);
+ continue;
+ }
+ bufs[idx] = buf;
+ }
+
+ if (memcmp(id->bim_magic, buf + (id->bim_sboff&0x3ff),
+ id->bim_len))
+ continue;
+
+ if ((id->bim_probe == NULL) ||
+ (id->bim_probe(fd, cache, dev, id, buf) == 0)) {
+ type = id->bim_type;
+ goto found_type;
+ }
+ }
+
+ if (!id->bim_type && dev->bid_type) {
+ /*
+ * Zap the device filesystem type and try again
+ */
+ blkid_set_tag(dev, "TYPE", 0, 0);
+ blkid_set_tag(dev, "SEC_TYPE", 0, 0);
+ blkid_set_tag(dev, "LABEL", 0, 0);
+ blkid_set_tag(dev, "UUID", 0, 0);
+ goto try_again;
+ }
+
+ if (!dev->bid_type) {
+ blkid_free_dev(dev);
+ return NULL;
+ }
+
+found_type:
+ if (dev && type) {
+ dev->bid_devno = st.st_rdev;
+ dev->bid_time = time(NULL);
+ dev->bid_flags |= BLKID_BID_FL_VERIFIED;
+ cache->bic_flags |= BLKID_BIC_FL_CHANGED;
+
+ blkid_set_tag(dev, "TYPE", type, 0);
+
+ DBG(DEBUG_PROBE, printf("%s: devno 0x%04llx, type %s\n",
+ dev->bid_name, st.st_rdev, type));
+ }
+
+ close(fd);
+
+ return dev;
+}
+
+int blkid_known_fstype(const char *fstype)
+{
+ const struct blkid_magic *id;
+
+ for (id = type_array; id->bim_type; id++) {
+ if (strcmp(fstype, id->bim_type) == 0)
+ return 1;
+ }
+ return 0;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char **argv)
+{
+ blkid_dev dev;
+ blkid_cache cache;
+ int ret;
+
+ blkid_debug_mask = DEBUG_ALL;
+ if (argc != 2) {
+ fprintf(stderr, "Usage: %s device\n"
+ "Probe a single device to determine type\n", argv[0]);
+ exit(1);
+ }
+ if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) {
+ fprintf(stderr, "%s: error creating cache (%d)\n",
+ argv[0], ret);
+ exit(1);
+ }
+ dev = blkid_get_dev(cache, argv[1], BLKID_DEV_NORMAL);
+ if (!dev) {
+ printf("%s: %s has an unsupported type\n", argv[0], argv[1]);
+ return 1;
+ }
+ printf("%s is type %s\n", argv[1], dev->bid_type ?
+ dev->bid_type : "(null)");
+ if (dev->bid_label)
+ printf("\tlabel is '%s'\n", dev->bid_label);
+ if (dev->bid_uuid)
+ printf("\tuuid is %s\n", dev->bid_uuid);
+
+ blkid_free_dev(dev);
+ return 0;
+}
+#endif
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-04-18 22:07:55 +0000