From 7b4c7a681cc4c0a53dc8a8baf4853e921cfbf5de Mon Sep 17 00:00:00 2001 From: bigbiff Date: Thu, 1 Jan 2015 19:44:14 -0500 Subject: Update blkid to 2.25.0 Break libblkid into 4 libraries: libblkid, libuuid, libutil-linux and libfdisk. This should help in later patch updates. Change-Id: I680d9a7feb031e5c29a603e9c58aff4b65826262 --- libblkid/partitions.c | 1385 ------------------------------------------------- 1 file changed, 1385 deletions(-) delete mode 100644 libblkid/partitions.c (limited to 'libblkid/partitions.c') diff --git a/libblkid/partitions.c b/libblkid/partitions.c deleted file mode 100644 index 93ec4d224..000000000 --- a/libblkid/partitions.c +++ /dev/null @@ -1,1385 +0,0 @@ -/* - * partitions - partition tables parsing - * - * Copyright (C) 2008-2009 Karel Zak - * - * This file may be redistributed under the terms of the - * GNU Lesser General Public License. - * - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "partitions.h" -#include "sysfs.h" - -/** - * SECTION: partitions - * @title: Partitions probing - * @short_description: partitions tables detection and parsing - * - * This chain supports binary and NAME=value interfaces, but complete PT - * description is provided by binary interface only. The libblkid prober is - * compatible with kernel partition tables parser. The parser does not return - * empty (size=0) partitions or special hidden partitions. - * - * NAME=value interface, supported tags: - * - * @PTTYPE: partition table type (dos, gpt, etc.). - * - * @PART_ENTRY_SCHEME: partition table type - * - * @PART_ENTRY_NAME: partition name (gpt and mac only) - * - * @PART_ENTRY_UUID: partition UUID (gpt only) - * - * @PART_ENTRY_TYPE: partition type, 0xNN (e.g 0x82) or type UUID (gpt only) or type string (mac) - * - * @PART_ENTRY_FLAGS: partition flags (e.g. boot_ind) or attributes (e.g. gpt attributes) - * - * @PART_ENTRY_NUMBER: partition number - * - * @PART_ENTRY_OFFSET: the begin of the partition - * - * @PART_ENTRY_SIZE: size of the partition - * - * @PART_ENTRY_DISK: whole-disk maj:min - * - * Example: - * - * - * - * blkid_probe pr; - * const char *ptname; - * - * pr = blkid_new_probe_from_filename(devname); - * if (!pr) - * err("%s: faild to open device", devname); - * - * blkid_probe_enable_partitions(pr, TRUE); - * blkid_do_fullprobe(pr); - * - * blkid_probe_lookup_value(pr, "PTTYPE", &ptname, NULL); - * printf("%s partition type detected\n", pttype); - * - * blkid_free_probe(pr); - * - * // don't forget to check return codes in your code! - * - * - * - * Binary interface: - * - * - * - * blkid_probe pr; - * blkid_partlist ls; - * int nparts, i; - * - * pr = blkid_new_probe_from_filename(devname); - * if (!pr) - * err("%s: faild to open device", devname); - * - * ls = blkid_probe_get_partitions(pr); - * nparts = blkid_partlist_numof_partitions(ls); - * - * for (i = 0; i < nparts; i++) { - * blkid_partition par = blkid_partlist_get_partition(ls, i); - * printf("#%d: %llu %llu 0x%x", - * blkid_partition_get_partno(par), - * blkid_partition_get_start(par), - * blkid_partition_get_size(par), - * blkid_partition_get_type(par)); - * } - * - * blkid_free_probe(pr); - * - * // don't forget to check return codes in your code! - * - * - */ - -/* - * Chain driver function - */ -static int partitions_probe(blkid_probe pr, struct blkid_chain *chn); -static void partitions_free_data(blkid_probe pr, void *data); - -/* - * Partitions chain probing functions - */ -static const struct blkid_idinfo *idinfos[] = -{ - &aix_pt_idinfo, - &sgi_pt_idinfo, - &sun_pt_idinfo, - &dos_pt_idinfo, - &gpt_pt_idinfo, - &mac_pt_idinfo, - &ultrix_pt_idinfo, - &bsd_pt_idinfo, - &unixware_pt_idinfo, - &solaris_x86_pt_idinfo, - &minix_pt_idinfo -}; - -/* - * Driver definition - */ -const struct blkid_chaindrv partitions_drv = { - .id = BLKID_CHAIN_PARTS, - .name = "partitions", - .dflt_enabled = FALSE, - .idinfos = idinfos, - .nidinfos = ARRAY_SIZE(idinfos), - .has_fltr = TRUE, - .probe = partitions_probe, - .safeprobe = partitions_probe, - .free_data = partitions_free_data -}; - - -/* - * For compatibility with the rest of libblkid API (with the old high-level - * API) we use completely opaque typedefs for all structs. Don't forget that - * the final blkid_* types are pointers! See blkid.h. - * - * [Just for the record, I hate typedef for pointers --kzak] - */ - -/* exported as opaque type "blkid_parttable" */ -struct blkid_struct_parttable { - const char *type; /* partition table type */ - blkid_loff_t offset; /* begin of the partition table */ - int nparts; /* number of partitions */ - blkid_partition parent; /* parent of nested partition table */ - char id[37]; /* PT identifier (e.g. UUID for GPT) */ - - struct list_head t_tabs; /* all tables */ -}; - -/* exported as opaque type "blkid_partition" */ -struct blkid_struct_partition { - blkid_loff_t start; /* begin of the partition */ - blkid_loff_t size; /* size of the partitions */ - - int type; /* partition type */ - char typestr[37]; /* partition type string (GPT and Mac) */ - - unsigned long long flags; /* partition flags / attributes */ - - int partno; /* partition number */ - char uuid[37]; /* UUID (when supported by PT), e.g GPT */ - unsigned char name[128]; /* Partition in UTF8 name (when supporte by PT), e.g. Mac */ - - blkid_parttable tab; /* partition table */ -}; - -/* exported as opaque type "blkid_partlist" */ -struct blkid_struct_partlist { - int next_partno; /* next partition number */ - blkid_partition next_parent; /* next parent if parsing nested PT */ - - int nparts; /* number of partitions */ - int nparts_max; /* max.number of partitions */ - blkid_partition parts; /* array of partitions */ - - struct list_head l_tabs; /* list of partition tables */ -}; - -static int blkid_partitions_probe_partition(blkid_probe pr); - -/** - * blkid_probe_enable_partitions: - * @pr: probe - * @enable: TRUE/FALSE - * - * Enables/disables the partitions probing for non-binary interface. - * - * Returns: 0 on success, or -1 in case of error. - */ -int blkid_probe_enable_partitions(blkid_probe pr, int enable) -{ - if (!pr) - return -1; - pr->chains[BLKID_CHAIN_PARTS].enabled = enable; - return 0; -} - -/** - * blkid_probe_set_partitions_flags: - * @pr: prober - * @flags: BLKID_PARTS_* flags - * - * Sets probing flags to the partitions prober. This function is optional. - * - * Returns: 0 on success, or -1 in case of error. - */ -int blkid_probe_set_partitions_flags(blkid_probe pr, int flags) -{ - if (!pr) - return -1; - pr->chains[BLKID_CHAIN_PARTS].flags = flags; - return 0; -} - -/** - * blkid_probe_reset_partitions_filter: - * @pr: prober - * - * Resets partitions probing filter - * - * Returns: 0 on success, or -1 in case of error. - */ -int blkid_probe_reset_partitions_filter(blkid_probe pr) -{ - return __blkid_probe_reset_filter(pr, BLKID_CHAIN_PARTS); -} - -/** - * blkid_probe_invert_partitions_filter: - * @pr: prober - * - * Inverts partitions probing filter - * - * Returns: 0 on success, or -1 in case of error. - */ -int blkid_probe_invert_partitions_filter(blkid_probe pr) -{ - return __blkid_probe_invert_filter(pr, BLKID_CHAIN_PARTS); -} - -/** - * blkid_probe_filter_partitions_type: - * @pr: prober - * @flag: filter BLKID_FLTR_{NOTIN,ONLYIN} flag - * @names: NULL terminated array of probing function names (e.g. "vfat"). - * - * %BLKID_FLTR_NOTIN - probe for all items which are NOT IN @names - * - * %BLKID_FLTR_ONLYIN - probe for items which are IN @names - * - * Returns: 0 on success, or -1 in case of error. - */ -int blkid_probe_filter_partitions_type(blkid_probe pr, int flag, char *names[]) -{ - return __blkid_probe_filter_types(pr, BLKID_CHAIN_PARTS, flag, names); -} - -/** - * blkid_probe_get_partitions: - * @pr: probe - * - * This is a binary interface for partitions. See also blkid_partlist_* - * functions. - * - * This function is independent on blkid_do_[safe,full]probe() and - * blkid_probe_enable_partitions() calls. - * - * WARNING: the returned object will be overwritten by the next - * blkid_probe_get_partitions() call for the same @pr. If you want to - * use more blkid_partlist objects in the same time you have to create - * more blkid_probe handlers (see blkid_new_probe()). - * - * Returns: list of partitions, or NULL in case of error. - */ -blkid_partlist blkid_probe_get_partitions(blkid_probe pr) -{ - return (blkid_partlist) blkid_probe_get_binary_data(pr, - &pr->chains[BLKID_CHAIN_PARTS]); -} - -/* for internal usage only */ -blkid_partlist blkid_probe_get_partlist(blkid_probe pr) -{ - return (blkid_partlist) pr->chains[BLKID_CHAIN_PARTS].data; -} - -static void blkid_probe_set_partlist(blkid_probe pr, blkid_partlist ls) -{ - pr->chains[BLKID_CHAIN_PARTS].data = ls; -} - -static void ref_parttable(blkid_parttable tab) -{ - tab->nparts++; -} - -static void unref_parttable(blkid_parttable tab) -{ - tab->nparts--; - - if (tab->nparts <= 0) { - list_del(&tab->t_tabs); - free(tab); - } -} - -/* free all allocated parttables */ -static void free_parttables(blkid_partlist ls) -{ - if (!ls || !ls->l_tabs.next) - return; - - /* remove unassigned partition tables */ - while (!list_empty(&ls->l_tabs)) { - blkid_parttable tab = list_entry(ls->l_tabs.next, - struct blkid_struct_parttable, t_tabs); - unref_parttable(tab); - } -} - -static void reset_partlist(blkid_partlist ls) -{ - if (!ls) - return; - - free_parttables(ls); - - if (ls->next_partno) { - /* already initialized - reset */ - int tmp_nparts = ls->nparts_max; - blkid_partition tmp_parts = ls->parts; - - memset(ls, 0, sizeof(struct blkid_struct_partlist)); - - ls->nparts_max = tmp_nparts; - ls->parts = tmp_parts; - } - - ls->nparts = 0; - ls->next_partno = 1; - INIT_LIST_HEAD(&ls->l_tabs); - - DBG(DEBUG_LOWPROBE, printf("partlist reset\n")); -} - -static blkid_partlist partitions_init_data(struct blkid_chain *chn) -{ - blkid_partlist ls; - - if (chn->data) - ls = (blkid_partlist) chn->data; - else { - /* allocate the new list of partitions */ - ls = calloc(1, sizeof(struct blkid_struct_partlist)); - if (!ls) - return NULL; - chn->data = (void *) ls; - } - - reset_partlist(ls); - - DBG(DEBUG_LOWPROBE, - printf("parts: initialized partitions list (%p, size=%d)\n", - ls, ls->nparts_max)); - return ls; -} - -static void partitions_free_data(blkid_probe pr __attribute__((__unused__)), - void *data) -{ - blkid_partlist ls = (blkid_partlist) data; - - if (!ls) - return; - - free_parttables(ls); - - /* deallocate partitions and partlist */ - free(ls->parts); - free(ls); -} - -blkid_parttable blkid_partlist_new_parttable(blkid_partlist ls, - const char *type, blkid_loff_t offset) -{ - blkid_parttable tab; - - tab = calloc(1, sizeof(struct blkid_struct_parttable)); - if (!tab) - return NULL; - tab->type = type; - tab->offset = offset; - tab->parent = ls->next_parent; - - INIT_LIST_HEAD(&tab->t_tabs); - list_add_tail(&tab->t_tabs, &ls->l_tabs); - - DBG(DEBUG_LOWPROBE, - printf("parts: create a new partition table " - "(%p, type=%s, offset=%"PRId64")\n", tab, type, offset)); - return tab; -} - -static blkid_partition new_partition(blkid_partlist ls, blkid_parttable tab) -{ - blkid_partition par; - - if (ls->nparts + 1 > ls->nparts_max) { - /* Linux kernel has DISK_MAX_PARTS=256, but it's too much for - * generic Linux machine -- let start with 32 partititions. - */ - ls->parts = realloc(ls->parts, (ls->nparts_max + 32) * - sizeof(struct blkid_struct_partition)); - if (!ls->parts) - return NULL; - ls->nparts_max += 32; - } - - par = &ls->parts[ls->nparts++]; - memset(par, 0, sizeof(struct blkid_struct_partition)); - - ref_parttable(tab); - par->tab = tab; - par->partno = blkid_partlist_increment_partno(ls); - - return par; -} - -blkid_partition blkid_partlist_add_partition(blkid_partlist ls, - blkid_parttable tab, - blkid_loff_t start, blkid_loff_t size) -{ - blkid_partition par = new_partition(ls, tab); - - if (!par) - return NULL; - - par->start = start; - par->size = size; - - DBG(DEBUG_LOWPROBE, - printf("parts: add partition (%p start=%" - PRId64 ", size=%" PRId64 ", table=%p)\n", - par, par->start, par->size, tab)); - return par; -} - -/* allows to modify used partitions numbers (for example for logical partitions) */ -int blkid_partlist_set_partno(blkid_partlist ls, int partno) -{ - if (!ls) - return -1; - ls->next_partno = partno; - return 0; -} - -int blkid_partlist_increment_partno(blkid_partlist ls) -{ - return ls ? ls->next_partno++ : -1; -} - -/* allows to set "parent" for the next nested partition */ -int blkid_partlist_set_parent(blkid_partlist ls, blkid_partition par) -{ - if (!ls) - return -1; - ls->next_parent = par; - return 0; -} - -blkid_partition blkid_partlist_get_parent(blkid_partlist ls) -{ - if (!ls) - return NULL; - return ls->next_parent; -} - -int blkid_partitions_need_typeonly(blkid_probe pr) -{ - struct blkid_chain *chn = blkid_probe_get_chain(pr); - - return chn && chn->data && chn->binary ? FALSE : TRUE; -} - -/* get private chain flags */ -int blkid_partitions_get_flags(blkid_probe pr) -{ - struct blkid_chain *chn = blkid_probe_get_chain(pr); - - return chn ? chn->flags : 0; -} - -/* check if @start and @size are within @par partition */ -int blkid_is_nested_dimension(blkid_partition par, - blkid_loff_t start, blkid_loff_t size) -{ - blkid_loff_t pstart; - blkid_loff_t psize; - - if (!par) - return 0; - - pstart = blkid_partition_get_start(par); - psize = blkid_partition_get_size(par); - - if (start < pstart || start + size > pstart + psize) - return 0; - - return 1; -} - -static int idinfo_probe(blkid_probe pr, const struct blkid_idinfo *id, - struct blkid_chain *chn) -{ - const struct blkid_idmag *mag = NULL; - blkid_loff_t off; - int rc = 1; /* = nothing detected */ - - if (pr->size <= 0 || (id->minsz && id->minsz > pr->size)) - goto nothing; /* the device is too small */ - - if (blkid_probe_get_idmag(pr, id, &off, &mag)) - goto nothing; - - /* final check by probing function */ - if (id->probefunc) { - DBG(DEBUG_LOWPROBE, printf( - "%s: ---> call probefunc()\n", id->name)); - rc = id->probefunc(pr, mag); - if (rc == -1) { - /* reset after error */ - reset_partlist(blkid_probe_get_partlist(pr)); - if (chn && !chn->binary) - blkid_probe_chain_reset_vals(pr, chn); - DBG(DEBUG_LOWPROBE, printf( - "%s probefunc failed\n", id->name)); - } - if (rc == 0 && mag && chn && !chn->binary) - rc = blkid_probe_set_magic(pr, off, mag->len, - (unsigned char *) mag->magic); - - DBG(DEBUG_LOWPROBE, printf( - "%s: <--- (rc = %d)\n", id->name, rc)); - } - -nothing: - return rc; -} - -/* - * The blkid_do_probe() backend. - */ -static int partitions_probe(blkid_probe pr, struct blkid_chain *chn) -{ - int rc = 1; - size_t i; - - if (!pr || chn->idx < -1) - return -1; - blkid_probe_chain_reset_vals(pr, chn); - - if (chn->binary) - partitions_init_data(chn); - - if (!pr->wipe_size && (pr->prob_flags & BLKID_PROBE_FL_IGNORE_PT)) - goto details_only; - - DBG(DEBUG_LOWPROBE, - printf("--> starting probing loop [PARTS idx=%d]\n", - chn->idx)); - - i = chn->idx < 0 ? 0 : chn->idx + 1U; - - for ( ; i < ARRAY_SIZE(idinfos); i++) { - const char *name; - - chn->idx = i; - - /* apply filter */ - if (chn->fltr && blkid_bmp_get_item(chn->fltr, i)) - continue; - - /* apply checks from idinfo */ - if (idinfo_probe(pr, idinfos[i], chn) != 0) - continue; - - name = idinfos[i]->name; - - /* all checks passed */ - if (!chn->binary) - blkid_probe_set_value(pr, "PTTYPE", - (unsigned char *) name, - strlen(name) + 1); - DBG(DEBUG_LOWPROBE, - printf("<-- leaving probing loop (type=%s) [PARTS idx=%d]\n", - name, chn->idx)); - rc = 0; - break; - } - - if (rc == 1) { - DBG(DEBUG_LOWPROBE, - printf("<-- leaving probing loop (failed) [PARTS idx=%d]\n", - chn->idx)); - } - -details_only: - /* - * Gather PART_ENTRY_* values if the current device is a partition. - */ - if (!chn->binary && - (blkid_partitions_get_flags(pr) & BLKID_PARTS_ENTRY_DETAILS)) { - - if (!blkid_partitions_probe_partition(pr)) - rc = 0; - } - - return rc; -} - -/* Probe for nested partition table within the parental partition */ -int blkid_partitions_do_subprobe(blkid_probe pr, blkid_partition parent, - const struct blkid_idinfo *id) -{ - blkid_probe prc; - int rc = 1; - blkid_partlist ls; - blkid_loff_t sz, off; - - DBG(DEBUG_LOWPROBE, printf( - "parts: ----> %s subprobe requested (parent=%p)\n", - id->name, parent)); - - if (!pr || !parent || !parent->size) - return -1; - - /* range defined by parent */ - sz = ((blkid_loff_t) parent->size) << 9; - off = ((blkid_loff_t) parent->start) << 9; - - if (off < pr->off || pr->off + pr->size < off + sz) { - DBG(DEBUG_LOWPROBE, printf( - "ERROR: parts: <---- '%s' subprobe: overflow detected.\n", - id->name)); - return -1; - } - - /* create private prober */ - prc = blkid_clone_probe(pr); - if (!prc) - return -1; - - blkid_probe_set_dimension(prc, off, sz); - - /* clone is always with reset chain, fix it */ - prc->cur_chain = blkid_probe_get_chain(pr); - - /* - * Set 'parent' to the current list of the partitions and use the list - * in cloned prober (so the cloned prober will extend the current list - * of partitions rather than create a new). - */ - ls = blkid_probe_get_partlist(pr); - blkid_partlist_set_parent(ls, parent); - - blkid_probe_set_partlist(prc, ls); - - rc = idinfo_probe(prc, id, blkid_probe_get_chain(pr)); - - blkid_probe_set_partlist(prc, NULL); - blkid_partlist_set_parent(ls, NULL); - - blkid_free_probe(prc); /* free cloned prober */ - - DBG(DEBUG_LOWPROBE, printf( - "parts: <---- %s subprobe done (parent=%p, rc=%d)\n", - id->name, parent, rc)); - - return rc; -} - -static int blkid_partitions_probe_partition(blkid_probe pr) -{ - int rc = 1; - blkid_probe disk_pr = NULL; - blkid_partlist ls; - blkid_partition par; - dev_t devno; - - devno = blkid_probe_get_devno(pr); - if (!devno) - goto nothing; - - disk_pr = blkid_probe_get_wholedisk_probe(pr); - if (!disk_pr) - goto nothing; - - /* parse PT */ - ls = blkid_probe_get_partitions(disk_pr); - if (!ls) - goto nothing; - - par = blkid_partlist_devno_to_partition(ls, devno); - if (par) { - const char *v; - blkid_parttable tab = blkid_partition_get_table(par); - dev_t disk = blkid_probe_get_devno(disk_pr); - - if (tab) { - v = blkid_parttable_get_type(tab); - if (v) - blkid_probe_set_value(pr, "PART_ENTRY_SCHEME", - (unsigned char *) v, strlen(v) + 1); - } - - v = blkid_partition_get_name(par); - if (v) - blkid_probe_set_value(pr, "PART_ENTRY_NAME", - (unsigned char *) v, strlen(v) + 1); - - v = blkid_partition_get_uuid(par); - if (v) - blkid_probe_set_value(pr, "PART_ENTRY_UUID", - (unsigned char *) v, strlen(v) + 1); - - /* type */ - v = blkid_partition_get_type_string(par); - if (v) - blkid_probe_set_value(pr, "PART_ENTRY_TYPE", - (unsigned char *) v, strlen(v) + 1); - else - blkid_probe_sprintf_value(pr, "PART_ENTRY_TYPE", - "0x%x", blkid_partition_get_type(par)); - - if (blkid_partition_get_flags(par)) - blkid_probe_sprintf_value(pr, "PART_ENTRY_FLAGS", - "0x%llx", blkid_partition_get_flags(par)); - - blkid_probe_sprintf_value(pr, "PART_ENTRY_NUMBER", - "%d", blkid_partition_get_partno(par)); - - blkid_probe_sprintf_value(pr, "PART_ENTRY_OFFSET", "%jd", - blkid_partition_get_start(par)); - blkid_probe_sprintf_value(pr, "PART_ENTRY_SIZE", "%jd", - blkid_partition_get_size(par)); - - blkid_probe_sprintf_value(pr, "PART_ENTRY_DISK", "%u:%u", - major(disk), minor(disk)); - } - rc = 0; -nothing: - return rc; -} - -/* - * Returns 1 if the device is whole-disk and the area specified by @offset and - * @size is covered by any partition. - */ -int blkid_probe_is_covered_by_pt(blkid_probe pr, - blkid_loff_t offset, blkid_loff_t size) -{ - blkid_probe prc; - blkid_partlist ls = NULL; - blkid_loff_t start, end; - int nparts, i, rc = 0; - - DBG(DEBUG_LOWPROBE, printf( - "=> checking if off=%jd size=%jd covered by PT\n", - offset, size)); - - prc = blkid_clone_probe(pr); - if (!prc) - goto done; - - ls = blkid_probe_get_partitions(prc); - if (!ls) - goto done; - - nparts = blkid_partlist_numof_partitions(ls); - if (!nparts) - goto done; - - end = (offset + size) >> 9; - start = offset >> 9; - - /* check if the partition table fits into the device */ - for (i = 0; i < nparts; i++) { - blkid_partition par = &ls->parts[i]; - - if (par->start + par->size > (pr->size >> 9)) { - DBG(DEBUG_LOWPROBE, printf("partition #%d overflows " - "device (off=%" PRId64 " size=%" PRId64 ")\n", - par->partno, par->start, par->size)); - goto done; - } - } - - /* check if the requested area is covered by PT */ - for (i = 0; i < nparts; i++) { - blkid_partition par = &ls->parts[i]; - - if (start >= par->start && end <= par->start + par->size) { - rc = 1; - break; - } - } -done: - blkid_free_probe(prc); - - DBG(DEBUG_LOWPROBE, printf("<= %s covered by PT\n", rc ? "IS" : "NOT")); - return rc; -} - -/** - * blkid_known_pttype: - * @pttype: partiton name - * - * Returns: 1 for known or 0 for unknown partition type. - */ -int blkid_known_pttype(const char *pttype) -{ - size_t i; - - if (!pttype) - return 0; - - for (i = 0; i < ARRAY_SIZE(idinfos); i++) { - const struct blkid_idinfo *id = idinfos[i]; - if (strcmp(id->name, pttype) == 0) - return 1; - } - return 0; -} - -/** - * blkid_partlist_numof_partitions: - * @ls: partitions list - * - * Returns: number of partitions in the list or -1 in case of error. - */ -int blkid_partlist_numof_partitions(blkid_partlist ls) -{ - return ls ? ls->nparts : -1; -} - -/** - * blkid_partlist_get_table: - * @ls: partitions list - * - * Returns: top-level partition table or NULL of there is not a partition table - * on the device. - */ -blkid_parttable blkid_partlist_get_table(blkid_partlist ls) -{ - if (!ls || list_empty(&ls->l_tabs)) - return NULL; - - return list_entry(ls->l_tabs.next, - struct blkid_struct_parttable, t_tabs); -} - - -/** - * blkid_partlist_get_partition: - * @ls: partitions list - * @n: partition number in range 0..N, where 'N' is blkid_partlist_numof_partitions(). - * - * It's possible that the list of partitions is *empty*, but there is a valid - * partition table on the disk. This happen when on-disk details about - * partitions are unknown or the partition table is empty. - * - * See also blkid_partlist_get_table(). - * - * Returns: partition object or NULL in case or error. - */ -blkid_partition blkid_partlist_get_partition(blkid_partlist ls, int n) -{ - if (!ls || n < 0 || n >= ls->nparts) - return NULL; - - return &ls->parts[n]; -} - -/** - * blkid_partlist_devno_to_partition: - * @ls: partitions list - * @devno: requested partition - * - * This function tries to get start and size for @devno from sysfs and - * returns a partition from @ls which matches with the values from sysfs. - * - * This function is necessary when you want to make a relation between an entry - * in the partition table (@ls) and block devices in your system. - * - * Returns: partition object or NULL in case or error. - */ -blkid_partition blkid_partlist_devno_to_partition(blkid_partlist ls, dev_t devno) -{ - struct sysfs_cxt sysfs; - uint64_t start, size; - int i, rc, partno = 0; - - if (!ls) - return NULL; - - DBG(DEBUG_LOWPROBE, - printf("triyng to convert devno 0x%llx to partition\n", - (long long) devno)); - - if (sysfs_init(&sysfs, devno, NULL)) { - DBG(DEBUG_LOWPROBE, printf("failed t init sysfs context\n")); - return NULL; - } - rc = sysfs_read_u64(&sysfs, "size", &size); - if (!rc) { - rc = sysfs_read_u64(&sysfs, "start", &start); - if (rc) { - /* try to get partition number from DM uuid. - */ - char *uuid = sysfs_strdup(&sysfs, "dm/uuid"); - char *tmp = uuid; - char *prefix = uuid ? strsep(&tmp, "-") : NULL; - - if (prefix && strncasecmp(prefix, "part", 4) == 0) { - char *end = NULL; - - partno = strtol(prefix + 4, &end, 10); - if (prefix == end || (end && *end)) - partno = 0; - else - rc = 0; /* success */ - } - free(uuid); - } - } - - sysfs_deinit(&sysfs); - - if (rc) - return NULL; - - if (partno) { - DBG(DEBUG_LOWPROBE, printf("mapped by DM, using partno %d\n", partno)); - - /* - * Partition mapped by kpartx does not provide "start" offset - * in /sys, but if we know partno and size of the partition - * that we can probably make the releation bettween the device - * and an entry in partition table. - */ - for (i = 0; i < ls->nparts; i++) { - blkid_partition par = &ls->parts[i]; - - if (partno != blkid_partition_get_partno(par)) - continue; - - if ((blkid_loff_t) size == blkid_partition_get_size(par) || - (blkid_partition_is_extended(par) && size <= 1024)) - return par; - - } - return NULL; - } - - DBG(DEBUG_LOWPROBE, printf("searching by offset/size\n")); - - for (i = 0; i < ls->nparts; i++) { - blkid_partition par = &ls->parts[i]; - - if (blkid_partition_get_start(par) == (blkid_loff_t) start && - blkid_partition_get_size(par) == (blkid_loff_t) size) - return par; - - /* exception for extended dos partitions */ - if (blkid_partition_get_start(par) == (blkid_loff_t) start && - blkid_partition_is_extended(par) && size <= 1024) - return par; - - } - - DBG(DEBUG_LOWPROBE, printf("not found partition for device\n")); - return NULL; -} - -int blkid_parttable_set_id(blkid_parttable tab, const unsigned char *id) -{ - if (!tab) - return -1; - - if (strcmp(tab->type, "gpt") == 0) - blkid_unparse_uuid(id, tab->id, sizeof(tab->id)); - else if (strcmp(tab->type, "dos") == 0) - strncpy(tab->id, (const char *) id, sizeof(tab->id)); - - return 0; -} - -/** - * blkid_parttable_get_id: - * @tab: partition table - * - * The ID is GPT disk UUID or DOS disk ID (in hex format). - * - * Returns: partition table ID (for example GPT disk UUID) or NULL - */ -const char *blkid_parttable_get_id(blkid_parttable tab) -{ - return tab && tab->id && *tab->id ? tab->id : NULL; -} - - -int blkid_partition_set_type(blkid_partition par, int type) -{ - if (!par) - return -1; - par->type = type; - return 0; -} - -/** - * blkid_parttable_get_type: - * @tab: partition table - * - * Returns: partition table type (type name, e.g. "dos", "gpt", ...) - */ -const char *blkid_parttable_get_type(blkid_parttable tab) -{ - return tab ? tab->type : NULL; -} - -/** - * blkid_parttable_get_parent: - * @tab: partition table - * - * Returns: parent for nexted partitition tables or NULL. - */ -blkid_partition blkid_parttable_get_parent(blkid_parttable tab) -{ - return tab ? tab->parent : NULL; -} - -/** - * blkid_parttable_get_offset: - * @tab: partition table - * - * Note the position is relative to begin of the device as defined by - * blkid_probe_set_device() for primary partition table, and relative - * to parental partition for nested patition tables. - * - * - * - * off_t offset; - * blkid_partition parent = blkid_parttable_get_parent(tab); - * - * offset = blkid_parttable_get_offset(tab); - * - * if (parent) - * / * 'tab' is nested partition table * / - * offset += blkid_partition_get_start(parent); - * - * - - * Returns: position (in bytes) of the partition table or -1 in case of error. - * - */ -blkid_loff_t blkid_parttable_get_offset(blkid_parttable tab) -{ - return tab ? tab->offset : -1; -} - -/** - * blkid_partition_get_table: - * @par: partition - * - * The "parttable" describes partition table. The table is usually the same for - * all partitions -- except nested partition tables. - * - * For example bsd, solaris, etc. use a nested partition table within - * standard primary dos partition: - * - * - * - * - * -- dos partition table - * 0: sda1 dos primary partition - * 1: sda2 dos primary partition - * -- bsd partition table (with in sda2) - * 2: sda5 bds partition - * 3: sda6 bds partition - * - * - * - * - * The library does not to use a separate partition table object for dos logical - * partitions (partitions within extended partition). It's possible to - * differentiate between logical, extended and primary partitions by - * - * blkid_partition_is_{extended,primary,logical}(). - * - * Returns: partition table object or NULL in case of error. - */ -blkid_parttable blkid_partition_get_table(blkid_partition par) -{ - return par ? par->tab : NULL; -} - -static int partition_get_logical_type(blkid_partition par) -{ - blkid_parttable tab; - - if (!par) - return -1; - - tab = blkid_partition_get_table(par); - if (!tab || !tab->type) - return -1; - - if (tab->parent) - return 'L'; /* report nested partitions as logical */ - - if (!strcmp(tab->type, "dos")) { - if (par->partno > 4) - return 'L'; /* logical */ - - if(par->type == BLKID_DOS_EXTENDED_PARTITION || - par->type == BLKID_W95_EXTENDED_PARTITION || - par->type == BLKID_LINUX_EXTENDED_PARTITION) - return 'E'; - } - return 'P'; -} - -/** - * blkid_partition_is_primary: - * @par: partition - * - * Note, this function returns FALSE for DOS extended partitions and - * all partitions in nested partition tables. - * - * Returns: 1 if the partitions is primary partition or 0 if not. - */ -int blkid_partition_is_primary(blkid_partition par) -{ - return partition_get_logical_type(par) == 'P' ? TRUE : FALSE; -} - -/** - * blkid_partition_is_extended: - * @par: partition - * - * Returns: 1 if the partitions is extended (dos, windows or linux) - * partition or 0 if not. - */ -int blkid_partition_is_extended(blkid_partition par) -{ - return partition_get_logical_type(par) == 'E' ? TRUE : FALSE; -} - -/** - * blkid_partition_is_logical: - * @par: partition - * - * Note that this function returns TRUE for all partitions in all - * nested partition tables (e.g. BSD labels). - * - * Returns: 1 if the partitions is logical partition or 0 if not. - */ -int blkid_partition_is_logical(blkid_partition par) -{ - return partition_get_logical_type(par) == 'L' ? TRUE : FALSE; -} - -static void set_string(unsigned char *item, size_t max, - const unsigned char *data, size_t len) -{ - if (len >= max) - len = max - 1; - - memcpy(item, data, len); - item[len] = '\0'; - - blkid_rtrim_whitespace(item); -} - -int blkid_partition_set_name(blkid_partition par, - const unsigned char *name, size_t len) -{ - if (!par) - return -1; - - set_string(par->name, sizeof(par->name), name, len); - return 0; -} - -int blkid_partition_set_utf8name(blkid_partition par, const unsigned char *name, - size_t len, int enc) -{ - if (!par) - return -1; - - blkid_encode_to_utf8(enc, par->name, sizeof(par->name), name, len); - blkid_rtrim_whitespace(par->name); - return 0; -} - -int blkid_partition_set_uuid(blkid_partition par, const unsigned char *uuid) -{ - if (!par) - return -1; - - blkid_unparse_uuid(uuid, par->uuid, sizeof(par->uuid)); - return 0; -} - -/** - * blkid_partition_get_name: - * @par: partition - * - * Returns: partition name string if supported by PT (e.g. Mac) or NULL. - */ -const char *blkid_partition_get_name(blkid_partition par) -{ - return par && *par->name ? (char *) par->name : NULL; -} - -/** - * blkid_partition_get_uuid: - * @par: partition - * - * Returns: partition UUID string if supported by PT (e.g. GPT) or NULL. - */ -const char *blkid_partition_get_uuid(blkid_partition par) -{ - return par && *par->uuid ? par->uuid : NULL; -} - -/** - * blkid_partition_get_partno: - * @par: partition - * - * Returns: proposed partitin number (e.g. 'N' from sda'N') or -1 in case of - * error. Note that the number is generate by library independenly on your OS. - */ -int blkid_partition_get_partno(blkid_partition par) -{ - return par ? par->partno : -1; -} - -/** - * blkid_partition_get_start: - * @par: partition - * - * Be careful if you _not_ probe whole disk: - * - * 1) the offset is usully relative to begin of the disk -- but if you probe a - * fragment of the disk only -- then the offset could be still relative to - * the begin of the disk rather that relative to the fragment. - * - * 2) the offset for nested partitions could be releative to parent (e.g. Solaris) - * _or_ relative to the begin of the whole disk (e.g. bsd). - * - * You don't have to care about such details if you proble whole disk. In such - * a case libblkid always returns the offset relative to the begin of the disk. - * - * Returns: start of the partition (in 512-sectors). - */ -blkid_loff_t blkid_partition_get_start(blkid_partition par) -{ - return par ? par->start : -1; -} - -/** - * blkid_partition_get_size: - * @par: partition - * - * WARNING: be very careful when you work with MS-DOS extended partitions. The - * library always returns full size of the partition. If you want add - * the partition to the Linux system (BLKPG_ADD_PARTITION ioctl) you - * need to reduce the size of the partition to 1 or 2 blocks. The - * rest of the partition has to be unaccessible for mkfs or mkswap - * programs, we need a small space for boot loaders only. - * - * For some unknown reason this (safe) practice is not to used for - * nested BSD, Solaris, ..., partition tables in Linux kernel. - * - * Returns: size of the partition (in 512-sectors). - */ -blkid_loff_t blkid_partition_get_size(blkid_partition par) -{ - return par ? par->size : -1; -} - -/** - * blkid_partition_get_type: - * @par: partition - * - * Returns: partition type. - */ -int blkid_partition_get_type(blkid_partition par) -{ - return par->type; -} - -/* Sets partition 'type' for PT where the type is defined by string rather - * than by number - */ -int blkid_partition_set_type_string(blkid_partition par, - const unsigned char *type, size_t len) -{ - if (!par) - return -1; - - set_string((unsigned char *) par->typestr, - sizeof(par->typestr), type, len); - return 0; -} - -/* Sets partition 'type' for PT where the type is defined by UUIDrather - * than by number - */ -int blkid_partition_set_type_uuid(blkid_partition par, const unsigned char *uuid) -{ - if (!par) - return -1; - - blkid_unparse_uuid(uuid, par->typestr, sizeof(par->typestr)); - return 0; -} - -/** - * blkid_partition_get_type_string: - * @par: partition - * - * The type string is supported by a small subset of partition tables (e.g Mac - * and EFI GPT). Note that GPT uses type UUID and this function returns this - * UUID as string. - * - * Returns: partition type string or NULL. - */ -const char *blkid_partition_get_type_string(blkid_partition par) -{ - return par && *par->typestr ? par->typestr : NULL; -} - - -int blkid_partition_set_flags(blkid_partition par, unsigned long long flags) -{ - if (!par) - return -1; - par->flags = flags; - return 0; -} - -/** - * blkid_partition_get_flags - * @par: partition - * - * Returns: partition flags (or attributes for gpt). - */ -unsigned long long blkid_partition_get_flags(blkid_partition par) -{ - return par->flags; -} - -- cgit v1.2.3