Index: uspace/lib/label/Makefile =================================================================== --- uspace/lib/label/Makefile (revision 78d50bd06d1f1eb12182cb42a78d0182b9256f3d) +++ uspace/lib/label/Makefile (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -33,4 +33,6 @@ SOURCES = \ + src/mbr.c \ + src/gpt.c \ src/label.c Index: uspace/lib/label/include/std/gpt.h =================================================================== --- uspace/lib/label/include/std/gpt.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) +++ uspace/lib/label/include/std/gpt.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2015 Jiri Svoboda + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +/** @addtogroup bd + * @{ + */ +/** @file + */ + +#ifndef LIBLABEL_STD_GPT_H_ +#define LIBLABEL_STD_GPT_H_ + +#include + +/** Block address of GPT header. */ +#define GPT_HDR_BA 1 + +/** GPT header */ +typedef struct { + uint8_t efi_signature[8]; + uint32_t revision; + uint32_t header_size; + uint32_t header_crc32; + uint32_t reserved; + uint64_t my_lba; + uint64_t alternate_lba; + uint64_t first_usable_lba; + uint64_t last_usable_lba; + uint8_t disk_guid[16]; + uint64_t entry_lba; + uint32_t num_entries; + uint32_t entry_size; + uint32_t pe_array_crc32; +} __attribute__((packed)) gpt_header_t; + +/** GPT partition entry */ +typedef struct { + uint8_t part_type[16]; + uint8_t part_id[16]; + uint64_t start_lba; + uint64_t end_lba; + uint64_t attributes; + uint16_t part_name[36]; +} __attribute__((packed)) gpt_entry_t; + +#endif + +/** @} + */ Index: uspace/lib/label/include/std/mbr.h =================================================================== --- uspace/lib/label/include/std/mbr.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) +++ uspace/lib/label/include/std/mbr.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -0,0 +1,93 @@ +/* + * Copyright (c) 2015 Jiri Svoboda + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +/** @addtogroup bd + * @{ + */ +/** @file + */ + +#ifndef LIBLABEL_STD_MBR_H_ +#define LIBLABEL_STD_MBR_H_ + +#include + +/** Block address of Master Boot Record. */ +#define MBR_BA 0 + +enum { + /** Number of primary partition records */ + mbr_nprimary = 4, + + /** Boot record signature */ + mbr_br_signature = 0xAA55 +}; + +enum ptype { + /** Unused partition entry */ + mbr_pt_unused = 0x00, + /** Extended partition */ + mbr_pt_extended = 0x05 +}; + +/** Structure of a partition table entry */ +typedef struct { + uint8_t status; + /** CHS of fist block in partition */ + uint8_t first_chs[3]; + /** Partition type */ + uint8_t ptype; + /** CHS of last block in partition */ + uint8_t last_chs[3]; + /** LBA of first block in partition */ + uint32_t first_lba; + /** Number of blocks in partition */ + uint32_t length; +} __attribute__((packed)) mbr_pte_t; + +/** Structure of a boot-record block */ +typedef struct { + /* Area for boot code */ + uint8_t code_area[440]; + + /* Optional media ID */ + uint32_t media_id; + + uint16_t pad0; + + /** Partition table entries */ + mbr_pte_t pte[mbr_nprimary]; + + /** Boot record block signature (@c BR_SIGNATURE) */ + uint16_t signature; +} __attribute__((packed)) mbr_br_block_t; + +#endif + +/** @} + */ Index: uspace/lib/label/include/types/liblabel.h =================================================================== --- uspace/lib/label/include/types/liblabel.h (revision 78d50bd06d1f1eb12182cb42a78d0182b9256f3d) +++ uspace/lib/label/include/types/liblabel.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -42,4 +42,22 @@ #include +typedef struct label label_t; +typedef struct label_part label_part_t; +typedef struct label_part_info label_part_info_t; +typedef struct label_part_spec label_part_spec_t; + +/** Ops for individual label type */ +typedef struct { + int (*open)(service_id_t, label_t **); + int (*create)(service_id_t, label_t **); + void (*close)(label_t *); + int (*destroy)(label_t *); + label_part_t *(*part_first)(label_t *); + label_part_t *(*part_next)(label_part_t *); + void (*part_get_info)(label_part_t *, label_part_info_t *); + int (*part_create)(label_t *, label_part_spec_t *, label_part_t **); + int (*part_destroy)(label_part_t *); +} label_ops_t; + typedef struct { /** Disk contents */ @@ -49,28 +67,34 @@ } label_info_t; -typedef struct { +struct label_part_info { /** Address of first block */ aoff64_t block0; /** Number of blocks */ aoff64_t nblocks; -} label_part_info_t; +}; /** Partition */ -typedef struct { +struct label_part { /** Containing label */ struct label *label; /** Link to label_t.parts */ link_t llabel; -} label_part_t; + aoff64_t block0; + aoff64_t nblocks; +}; /** Specification of new partition */ -typedef struct { -} label_part_spec_t; +struct label_part_spec { +}; /** Label instance */ -typedef struct label { +struct label { + /** Label type ops */ + label_ops_t *ops; + /** Label type */ + label_type_t ltype; /** Partitions */ list_t parts; /* of label_part_t */ -} label_t; +}; #endif Index: uspace/lib/label/src/gpt.c =================================================================== --- uspace/lib/label/src/gpt.c (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) +++ uspace/lib/label/src/gpt.c (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -0,0 +1,261 @@ +/* + * Copyright (c) 2015 Jiri Svoboda + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +/** @addtogroup liblabel + * @{ + */ +/** + * @file GUID Partition Table label. + */ + +#include +#include +#include +#include + +#include "std/gpt.h" +#include "gpt.h" + +static int gpt_open(service_id_t, label_t **); +static int gpt_create(service_id_t, label_t **); +static void gpt_close(label_t *); +static int gpt_destroy(label_t *); +static label_part_t *gpt_part_first(label_t *); +static label_part_t *gpt_part_next(label_part_t *); +static void gpt_part_get_info(label_part_t *, label_part_info_t *); +static int gpt_part_create(label_t *, label_part_spec_t *, label_part_t **); +static int gpt_part_destroy(label_part_t *); + +static int gpt_pte_to_part(label_t *, gpt_entry_t *); + +const uint8_t efi_signature[8] = { + /* "EFI PART" in ASCII */ + 0x45, 0x46, 0x49, 0x20, 0x50, 0x41, 0x52, 0x54 +}; + +label_ops_t gpt_label_ops = { + .open = gpt_open, + .create = gpt_create, + .close = gpt_close, + .destroy = gpt_destroy, + .part_first = gpt_part_first, + .part_next = gpt_part_next, + .part_get_info = gpt_part_get_info, + .part_create = gpt_part_create, + .part_destroy = gpt_part_destroy +}; + +static int gpt_open(service_id_t sid, label_t **rlabel) +{ + label_t *label = NULL; + gpt_header_t *gpt_hdr = NULL; + gpt_entry_t *eptr; + uint8_t *etable = NULL; + size_t bsize; + uint32_t num_entries; + uint32_t esize; + uint32_t bcnt; + uint64_t ba; + uint32_t entry; + int i; + int rc; + + rc = block_get_bsize(sid, &bsize); + if (rc != EOK) { + rc = EIO; + goto error; + } + + if (bsize < 512 || (bsize % 512) != 0) { + rc = EINVAL; + goto error; + } + + gpt_hdr = calloc(1, bsize); + if (gpt_hdr == NULL) { + rc = ENOMEM; + goto error; + } + + rc = block_read_direct(sid, GPT_HDR_BA, 1, gpt_hdr); + if (rc != EOK) { + rc = EIO; + goto error; + } + + label = calloc(1, sizeof(label_t)); + if (label == NULL) + return ENOMEM; + + list_initialize(&label->parts); + + for (i = 0; i < 8; ++i) { + if (gpt_hdr->efi_signature[i] != efi_signature[i]) { + rc = EINVAL; + goto error; + } + } + + num_entries = uint32_t_le2host(gpt_hdr->num_entries); + esize = uint32_t_le2host(gpt_hdr->entry_size); + bcnt = (num_entries + esize - 1) / esize; + ba = uint64_t_le2host(gpt_hdr->entry_lba); + + if (num_entries < 1) { + rc = EINVAL; + goto error; + } + + if (esize < sizeof(gpt_entry_t)) { + rc = EINVAL; + goto error; + } + + etable = calloc(num_entries, esize); + if (etable == NULL) { + rc = ENOMEM; + goto error; + } + + rc = block_read_direct(sid, ba, bcnt, etable); + if (rc != EOK) { + rc = EIO; + goto error; + } + + for (entry = 0; entry < num_entries; entry++) { + eptr = (gpt_entry_t *)(etable + entry * esize); + rc = gpt_pte_to_part(label, eptr); + if (rc != EOK) + goto error; + } + + free(etable); + etable = NULL; + free(gpt_hdr); + gpt_hdr = NULL; + + label->ops = &gpt_label_ops; + label->ltype = lt_gpt; + *rlabel = label; + return EOK; +error: + free(etable); + free(gpt_hdr); + free(label); + return rc; +} + +static int gpt_create(service_id_t sid, label_t **rlabel) +{ + return EOK; +} + +static void gpt_close(label_t *label) +{ + free(label); +} + +static int gpt_destroy(label_t *label) +{ + return EOK; +} + +static label_part_t *gpt_part_first(label_t *label) +{ + link_t *link; + + link = list_first(&label->parts); + if (link == NULL) + return NULL; + + return list_get_instance(link, label_part_t, llabel); +} + +static label_part_t *gpt_part_next(label_part_t *part) +{ + link_t *link; + + link = list_next(&part->llabel, &part->label->parts); + if (link == NULL) + return NULL; + + return list_get_instance(link, label_part_t, llabel); +} + +static void gpt_part_get_info(label_part_t *part, label_part_info_t *pinfo) +{ + pinfo->block0 = part->block0; + pinfo->nblocks = part->nblocks; +} + +static int gpt_part_create(label_t *label, label_part_spec_t *pspec, + label_part_t **rpart) +{ + return EOK; +} + +static int gpt_part_destroy(label_part_t *part) +{ + return EOK; +} + +static int gpt_pte_to_part(label_t *label, gpt_entry_t *pte) +{ + label_part_t *part; + bool present; + uint64_t b0, b1; + int i; + + present = false; + for (i = 0; i < 8; i++) + if (pte->part_type[i] != 0x00) + present = true; + + if (!present) + return EOK; + + part = calloc(1, sizeof(label_part_t)); + if (part == NULL) + return ENOMEM; + + b0 = uint64_t_le2host(pte->start_lba); + b1 = uint64_t_le2host(pte->end_lba); + if (b1 <= b0) + return EINVAL; + + part->block0 = b0; + part->nblocks = b1 - b0 + 1; + + part->label = label; + list_append(&part->llabel, &label->parts); + return EOK; +} + +/** @} + */ Index: uspace/lib/label/src/gpt.h =================================================================== --- uspace/lib/label/src/gpt.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) +++ uspace/lib/label/src/gpt.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2015 Jiri Svoboda + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +/** @addtogroup liblabel + * @{ + */ +/** + * @file GUID Partition Table label. + */ + +#ifndef LIBLABEL_GPT_H_ +#define LIBLABEL_GPT_H_ + +#include + +extern label_ops_t gpt_label_ops; + +#endif + +/** @} + */ Index: uspace/lib/label/src/label.c =================================================================== --- uspace/lib/label/src/label.c (revision 78d50bd06d1f1eb12182cb42a78d0182b9256f3d) +++ uspace/lib/label/src/label.c (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -40,28 +40,44 @@ #include +#include "gpt.h" + +static label_ops_t *probe_list[] = { + &gpt_label_ops, + NULL +}; + int label_open(service_id_t sid, label_t **rlabel) { - label_t *label; + label_ops_t **ops; + int rc; - label = calloc(1, sizeof(label_t)); - if (label == NULL) - return ENOMEM; + ops = &probe_list[0]; + while (ops[0] != NULL) { + rc = ops[0]->open(sid, rlabel); + if (rc == EOK) + return EOK; + ++ops; + } - list_initialize(&label->parts); - *rlabel = label; - return EOK; + return ENOTSUP; } int label_create(service_id_t sid, label_type_t ltype, label_t **rlabel) { - label_t *label; + label_ops_t *ops = NULL; - label = calloc(1, sizeof(label_t)); - if (label == NULL) - return ENOMEM; + switch (ltype) { + case lt_gpt: + ops = &gpt_label_ops; + break; + case lt_mbr: + ops = NULL; + break; + } - list_initialize(&label->parts); - *rlabel = label; - return EOK; + if (ops == NULL) + return ENOTSUP; + + return ops->create(sid, rlabel); } @@ -71,11 +87,10 @@ return; - free(label); + label->ops->close(label); } int label_destroy(label_t *label) { - free(label); - return EOK; + return label->ops->destroy(label); } @@ -83,5 +98,6 @@ { memset(linfo, 0, sizeof(label_info_t)); - linfo->dcnt = dc_empty; + linfo->dcnt = dc_label; + linfo->ltype = label->ltype; return EOK; } @@ -89,28 +105,15 @@ label_part_t *label_part_first(label_t *label) { - link_t *link; - - link = list_first(&label->parts); - if (link == NULL) - return NULL; - - return list_get_instance(link, label_part_t, llabel); + return label->ops->part_first(label); } label_part_t *label_part_next(label_part_t *part) { - link_t *link; - - link = list_next(&part->llabel, &part->label->parts); - if (link == NULL) - return NULL; - - return list_get_instance(link, label_part_t, llabel); + return part->label->ops->part_next(part); } void label_part_get_info(label_part_t *part, label_part_info_t *pinfo) { - pinfo->block0 = 0; - pinfo->nblocks = 0; + return part->label->ops->part_get_info(part, pinfo); } @@ -118,21 +121,10 @@ label_part_t **rpart) { - label_part_t *part; - - part = calloc(1, sizeof(label_part_t)); - if (part == NULL) - return ENOMEM; - - part->label = label; - list_append(&part->llabel, &label->parts); - *rpart = part; - return EOK; + return label->ops->part_create(label, pspec, rpart); } int label_part_destroy(label_part_t *part) { - list_remove(&part->llabel); - free(part); - return EOK; + return part->label->ops->part_destroy(part); } Index: uspace/lib/label/src/mbr.c =================================================================== --- uspace/lib/label/src/mbr.c (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) +++ uspace/lib/label/src/mbr.c (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -0,0 +1,221 @@ +/* + * Copyright (c) 2015 Jiri Svoboda + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +/** @addtogroup liblabel + * @{ + */ +/** + * @file Master Boot Record label + */ + +#include +#include +#include +#include + +#include "std/mbr.h" +#include "mbr.h" + +static int mbr_open(service_id_t, label_t **); +static int mbr_create(service_id_t, label_t **); +static void mbr_close(label_t *); +static int mbr_destroy(label_t *); +static label_part_t *mbr_part_first(label_t *); +static label_part_t *mbr_part_next(label_part_t *); +static void mbr_part_get_info(label_part_t *, label_part_info_t *); +static int mbr_part_create(label_t *, label_part_spec_t *, label_part_t **); +static int mbr_part_destroy(label_part_t *); + +static int mbr_pte_to_part(label_t *, mbr_pte_t *); + +label_ops_t mbr_label_ops = { + .open = mbr_open, + .create = mbr_create, + .close = mbr_close, + .destroy = mbr_destroy, + .part_first = mbr_part_first, + .part_next = mbr_part_next, + .part_get_info = mbr_part_get_info, + .part_create = mbr_part_create, + .part_destroy = mbr_part_destroy +}; + +static int mbr_open(service_id_t sid, label_t **rlabel) +{ + label_t *label = NULL; + mbr_br_block_t *mbr = NULL; + mbr_pte_t *eptr; + uint16_t sgn; + size_t bsize; + uint32_t entry; + int rc; + + rc = block_get_bsize(sid, &bsize); + if (rc != EOK) { + rc = EIO; + goto error; + } + + if (bsize < 512 || (bsize % 512) != 0) { + rc = EINVAL; + goto error; + } + + mbr = calloc(1, bsize); + if (mbr == NULL) { + rc = ENOMEM; + goto error; + } + + rc = block_read_direct(sid, MBR_BA, 1, mbr); + if (rc != EOK) { + rc = EIO; + goto error; + } + + label = calloc(1, sizeof(label_t)); + if (label == NULL) + return ENOMEM; + + list_initialize(&label->parts); + + /* Verify boot record signature */ + sgn = uint16_t_le2host(mbr->signature); + if (sgn != mbr_br_signature) { + rc = EIO; + goto error; + } + + for (entry = 0; entry < mbr_nprimary; entry++) { + eptr = &mbr->pte[entry]; + rc = mbr_pte_to_part(label, eptr); + if (rc != EOK) + goto error; + } + + free(mbr); + mbr = NULL; + + label->ops = &mbr_label_ops; + label->ltype = lt_mbr; + *rlabel = label; + return EOK; +error: + free(mbr); + free(label); + return rc; +} + +static int mbr_create(service_id_t sid, label_t **rlabel) +{ + return EOK; +} + +static void mbr_close(label_t *label) +{ + free(label); +} + +static int mbr_destroy(label_t *label) +{ + return EOK; +} + +static label_part_t *mbr_part_first(label_t *label) +{ + link_t *link; + + link = list_first(&label->parts); + if (link == NULL) + return NULL; + + return list_get_instance(link, label_part_t, llabel); +} + +static label_part_t *mbr_part_next(label_part_t *part) +{ + link_t *link; + + link = list_next(&part->llabel, &part->label->parts); + if (link == NULL) + return NULL; + + return list_get_instance(link, label_part_t, llabel); +} + +static void mbr_part_get_info(label_part_t *part, label_part_info_t *pinfo) +{ + pinfo->block0 = part->block0; + pinfo->nblocks = part->nblocks; +} + +static int mbr_part_create(label_t *label, label_part_spec_t *pspec, + label_part_t **rpart) +{ + return EOK; +} + +static int mbr_part_destroy(label_part_t *part) +{ + return EOK; +} + +static int mbr_pte_to_part(label_t *label, mbr_pte_t *pte) +{ + label_part_t *part; + uint32_t block0; + uint32_t nblocks; + + block0 = uint32_t_le2host(pte->first_lba); + nblocks = uint32_t_le2host(pte->length); + + /* See UEFI specification 2.0 section 5.2.1 Legacy Master Boot Record */ + if (pte->ptype == mbr_pt_unused || pte->ptype == mbr_pt_extended || + nblocks == 0) + return EOK; + + part = calloc(1, sizeof(label_part_t)); + if (part == NULL) + return ENOMEM; + + part->block0 = block0; + part->nblocks = nblocks; + + /* + * TODO: Verify + * - partition must reside on disk + * - partition must not overlap any other partition + */ + + part->label = label; + list_append(&part->llabel, &label->parts); + return EOK; +} + +/** @} + */ Index: uspace/lib/label/src/mbr.h =================================================================== --- uspace/lib/label/src/mbr.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) +++ uspace/lib/label/src/mbr.h (revision 3faa03dd95010d106f2bcc2ad1b10dd7ed86bcff) @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2015 Jiri Svoboda + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +/** @addtogroup liblabel + * @{ + */ +/** + * @file Master Boot Record label + */ + +#ifndef LIBLABEL_MBR_H_ +#define LIBLABEL_MBR_H_ + +#include + +extern label_ops_t mbr_label_ops; + +#endif + +/** @} + */