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https://github.com/systemd/systemd-stable.git
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[PATCH] udev_volume_id: version 27
Fix FAT label reading bug for very large volumes. Recognize FAT label at Win98 formatted volumes. Read iso9660 joliet descriptor for unicode labels. Support uuid/label of swap partitions.
This commit is contained in:
kay.sievers@vrfy.org
Greg KH
parent
adf3af8c35
commit
240ce55179
@ -78,7 +78,7 @@
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/* size of superblock buffer, reiserfs block is at 64k */
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#define SB_BUFFER_SIZE 0x11000
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/* size of seek buffer 4k */
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#define SEEK_BUFFER_SIZE 0x1000
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#define SEEK_BUFFER_SIZE 0x10000
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static void set_label_raw(struct volume_id *id,
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@ -221,8 +221,10 @@ static __u8 *get_buffer(struct volume_id *id, __u64 off, unsigned int len)
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return &(id->sbbuf[off]);
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} else {
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if (len > SEEK_BUFFER_SIZE)
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len = SEEK_BUFFER_SIZE;
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if (len > SEEK_BUFFER_SIZE) {
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dbg("seek buffer too small %d", SEEK_BUFFER_SIZE);
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return NULL;
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}
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/* get seek buffer */
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if (id->seekbuf == NULL) {
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@ -232,8 +234,7 @@ static __u8 *get_buffer(struct volume_id *id, __u64 off, unsigned int len)
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}
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/* check if we need to read */
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if ((off < id->seekbuf_off) ||
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((off + len) > (id->seekbuf_off + id->seekbuf_len))) {
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if ((off < id->seekbuf_off) || ((off + len) > (id->seekbuf_off + id->seekbuf_len))) {
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dbg("read seekbuf off:0x%llx len:0x%x", off, len);
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if (lseek(id->fd, off, SEEK_SET) == -1)
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return NULL;
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@ -241,8 +242,10 @@ static __u8 *get_buffer(struct volume_id *id, __u64 off, unsigned int len)
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dbg("got 0x%x (%i) bytes", buf_len, buf_len);
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id->seekbuf_off = off;
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id->seekbuf_len = buf_len;
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if (buf_len < len)
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if (buf_len < len) {
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dbg("requested 0x%x bytes, got only 0x%x bytes", len, buf_len);
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return NULL;
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}
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}
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return &(id->seekbuf[off - id->seekbuf_off]);
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@ -571,7 +574,7 @@ static int probe_msdos_part_table(struct volume_id *id, __u64 off)
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p->partition_type_raw = part[i].sys_ind;
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if (id->partition_count >= VOLUME_ID_PARTITIONS_MAX) {
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dbg("to many partitions");
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dbg("too many partitions");
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next = 0;
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}
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}
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@ -769,7 +772,9 @@ static int probe_jfs(struct volume_id *id, __u64 off)
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#define FAT12_MAX 0xff5
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#define FAT16_MAX 0xfff5
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#define FAT_ATTR_VOLUME 0x08
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#define FAT_ATTR_VOLUME_ID 0x08
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#define FAT_ATTR_DIR 0x10
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#define FAT_ENTRY_FREE 0xe5
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static int probe_vfat(struct volume_id *id, __u64 off)
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{
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struct vfat_super_block {
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@ -832,7 +837,7 @@ static int probe_vfat(struct volume_id *id, __u64 off)
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__u16 dir_entries;
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__u32 sect_count;
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__u16 reserved;
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__u16 fat_size;
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__u32 fat_size;
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__u32 root_cluster;
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__u32 dir_size;
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__u32 cluster_count;
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@ -959,12 +964,13 @@ valid:
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}
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/* empty entry */
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if (dir[i].name[0] == 0xe5)
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if (dir[i].name[0] == FAT_ENTRY_FREE)
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continue;
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if (dir[i].attr == FAT_ATTR_VOLUME) {
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dbg("found ATTR_VOLUME id in root dir");
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if ((dir[i].attr & (FAT_ATTR_VOLUME_ID | FAT_ATTR_DIR)) == FAT_ATTR_VOLUME_ID) {
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dbg("found ATTR_VOLUME_ID id in root dir");
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label = dir[i].name;
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break;
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}
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dbg("skip dir entry");
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@ -1017,11 +1023,11 @@ fat32:
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}
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/* empty entry */
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if (dir[i].name[0] == 0xe5)
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if (dir[i].name[0] == FAT_ENTRY_FREE)
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continue;
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if (dir[i].attr == FAT_ATTR_VOLUME) {
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dbg("found ATTR_VOLUME id in root dir");
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if ((dir[i].attr & (FAT_ATTR_VOLUME_ID | FAT_ATTR_DIR)) == FAT_ATTR_VOLUME_ID) {
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dbg("found ATTR_VOLUME_ID id in root dir");
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label = dir[i].name;
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goto fat32_label;
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}
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@ -1047,7 +1053,7 @@ fat32_label:
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if (label != NULL && strncmp(label, "NO NAME ", 11) != 0) {
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set_label_raw(id, label, 11);
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set_label_string(id, label, 11);
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} else if (strncmp(vs->type.fat32.label, "NO NAME ", 11) == 0) {
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} else if (strncmp(vs->type.fat32.label, "NO NAME ", 11) != 0) {
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set_label_raw(id, vs->type.fat32.label, 11);
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set_label_string(id, vs->type.fat32.label, 11);
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}
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@ -1214,6 +1220,12 @@ found:
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}
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#define ISO_SUPERBLOCK_OFFSET 0x8000
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#define ISO_SECTOR_SIZE 0x800
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#define ISO_VD_OFFSET (ISO_SUPERBLOCK_OFFSET + ISO_SECTOR_SIZE)
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#define ISO_VD_PRIMARY 0x1
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#define ISO_VD_SUPPLEMENTARY 0x2
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#define ISO_VD_END 0xff
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#define ISO_VD_MAX 16
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static int probe_iso9660(struct volume_id *id, __u64 off)
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{
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union iso_super_block {
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@ -1239,8 +1251,36 @@ static int probe_iso9660(struct volume_id *id, __u64 off)
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return -1;
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if (strncmp(is->iso.id, "CD001", 5) == 0) {
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set_label_raw(id, is->iso.volume_id, 32);
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set_label_string(id, is->iso.volume_id, 32);
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int vd_offset;
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int i;
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int found_svd;
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found_svd = 0;
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vd_offset = ISO_VD_OFFSET;
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for (i = 0; i < ISO_VD_MAX; i++) {
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is = (union iso_super_block *)
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get_buffer (id, off + vd_offset, 0x200);
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if (is == NULL || is->iso.type == ISO_VD_END)
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break;
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if (is->iso.type == ISO_VD_SUPPLEMENTARY) {
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dbg("found ISO supplementary VD at offset 0x%llx", off + vd_offset);
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found_svd = 1;
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break;
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}
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vd_offset += ISO_SECTOR_SIZE;
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}
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if (!found_svd) {
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is = (union iso_super_block *)
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get_buffer(id, off + ISO_SUPERBLOCK_OFFSET, 0x200);
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if (is == NULL)
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return -1;
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set_label_raw(id, is->iso.volume_id, 32);
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set_label_string(id, is->iso.volume_id, 32);
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} else {
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set_label_raw(id, is->iso.volume_id, 32);
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set_label_unicode16(id, is->iso.volume_id, BE, 32);
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}
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goto found;
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}
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if (strncmp(is->hs.id, "CDROM", 5) == 0)
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@ -1978,21 +2018,37 @@ found:
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#define LARGEST_PAGESIZE 0x4000
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static int probe_swap(struct volume_id *id, __u64 off)
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{
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const __u8 *sig;
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struct swap_header_v1_2 {
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__u8 bootbits[1024];
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__u32 version;
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__u32 last_page;
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__u32 nr_badpages;
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__u8 uuid[16];
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__u8 volume_name[16];
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} __attribute__((__packed__)) *sw;
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const __u8 *buf;
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unsigned int page;
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/* huhh, the swap signature is on the end of the PAGE_SIZE */
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/* the swap signature is at the end of the PAGE_SIZE */
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for (page = 0x1000; page <= LARGEST_PAGESIZE; page <<= 1) {
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sig = get_buffer(id, off + page-10, 10);
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if (sig == NULL)
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buf = get_buffer(id, off + page-10, 10);
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if (buf == NULL)
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return -1;
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if (strncmp(sig, "SWAP-SPACE", 10) == 0) {
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if (strncmp(buf, "SWAP-SPACE", 10) == 0) {
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strcpy(id->type_version, "1");
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goto found;
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}
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if (strncmp(sig, "SWAPSPACE2", 10) == 0) {
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if (strncmp(buf, "SWAPSPACE2", 10) == 0) {
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sw = (struct swap_header_v1_2 *) get_buffer(id, off, sizeof(struct swap_header_v1_2));
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if (sw == NULL)
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return -1;
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strcpy(id->type_version, "2");
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set_label_raw(id, sw->volume_name, 16);
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set_label_string(id, sw->volume_name, 16);
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set_uuid(id, sw->uuid, UUID_DCE);
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goto found;
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}
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}
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@ -2014,6 +2070,8 @@ int volume_id_probe(struct volume_id *id,
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{
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int rc;
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dbg("called with size=0x%llx", size);
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if (id == NULL)
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return -EINVAL;
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@ -2088,9 +2146,6 @@ int volume_id_probe(struct volume_id *id,
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break;
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/* signature in the first block, only small buffer needed */
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rc = probe_msdos_part_table(id, off);
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if (rc == 0)
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break;
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rc = probe_vfat(id, off);
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if (rc == 0)
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break;
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@ -21,14 +21,14 @@
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#ifndef _VOLUME_ID_H_
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#define _VOLUME_ID_H_
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#define VOLUME_ID_VERSION 26
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#define VOLUME_ID_VERSION 27
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#define VOLUME_ID_LABEL_SIZE 64
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#define VOLUME_ID_UUID_SIZE 16
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#define VOLUME_ID_UUID_STRING_SIZE 37
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#define VOLUME_ID_FORMAT_SIZE 32
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#define VOLUME_ID_PATH_MAX 256
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#define VOLUME_ID_PARTITIONS_MAX 16
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#define VOLUME_ID_PARTITIONS_MAX 256
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enum volume_id_usage {
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VOLUME_ID_UNUSED,
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