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/topology.c | 366 ---------------------------------------------------- 1 file changed, 366 deletions(-) delete mode 100644 libblkid/topology.c (limited to 'libblkid/topology.c') diff --git a/libblkid/topology.c b/libblkid/topology.c deleted file mode 100644 index 9d4e7bdf1..000000000 --- a/libblkid/topology.c +++ /dev/null @@ -1,366 +0,0 @@ -/* - * topology - gathers information about device topology - * - * Copyright 2009 Red Hat, Inc. All rights reserved. - * - * This file may be redistributed under the terms of the - * GNU Lesser General Public License. - */ - -#include -#include -#include -#include - -#include "topology.h" - -/** - * SECTION:topology - * @title: Topology information - * @short_description: block device topology information. - * - * The topology chain provides details about Linux block devices, for more - * information see: - * - * Linux kernel Documentation/ABI/testing/sysfs-block - * - * NAME=value (tags) interface is enabled by blkid_probe_enable_topology(), - * and provides: - * - * @LOGICAL_SECTOR_SIZE: this is the smallest unit the storage device can - * address. It is typically 512 bytes. - * - * @PHYSICAL_SECTOR_SIZE: this is the smallest unit a physical storage device - * can write atomically. It is usually the same as the - * logical sector size but may be bigger. - * - * @MINIMUM_IO_SIZE: minimum size which is the device's preferred unit of I/O. - * For RAID arrays it is often the stripe chunk size. - * - * @OPTIMAL_IO_SIZE: usually the stripe width for RAID or zero. For RAID arrays - * it is usually the stripe width or the internal track size. - * - * @ALIGNMENT_OFFSET: indicates how many bytes the beginning of the device is - * offset from the disk's natural alignment. - * - * The NAME=value tags are not defined when the corresponding topology value - * is zero. The MINIMUM_IO_SIZE should be always defined if kernel provides - * topology information. - * - * Binary interface: - * - * blkid_probe_get_topology() - * - * blkid_topology_get_'VALUENAME'() - */ -static int topology_probe(blkid_probe pr, struct blkid_chain *chn); -static void topology_free(blkid_probe pr, void *data); -static int topology_is_complete(blkid_probe pr); -static int topology_set_logical_sector_size(blkid_probe pr); - -/* - * Binary interface - */ -struct blkid_struct_topology { - unsigned long alignment_offset; - unsigned long minimum_io_size; - unsigned long optimal_io_size; - unsigned long logical_sector_size; - unsigned long physical_sector_size; -}; - -/* - * Topology chain probing functions - */ -static const struct blkid_idinfo *idinfos[] = -{ -#ifdef __linux__ - &ioctl_tp_idinfo, - &sysfs_tp_idinfo, - &md_tp_idinfo, - &dm_tp_idinfo, - &lvm_tp_idinfo, - &evms_tp_idinfo -#endif -}; - - -/* - * Driver definition - */ -const struct blkid_chaindrv topology_drv = { - .id = BLKID_CHAIN_TOPLGY, - .name = "topology", - .dflt_enabled = FALSE, - .idinfos = idinfos, - .nidinfos = ARRAY_SIZE(idinfos), - .probe = topology_probe, - .safeprobe = topology_probe, - .free_data = topology_free -}; - -/** - * blkid_probe_enable_topology: - * @pr: probe - * @enable: TRUE/FALSE - * - * Enables/disables the topology probing for non-binary interface. - * - * Returns: 0 on success, or -1 in case of error. - */ -int blkid_probe_enable_topology(blkid_probe pr, int enable) -{ - if (!pr) - return -1; - pr->chains[BLKID_CHAIN_TOPLGY].enabled = enable; - return 0; -} - -/** - * blkid_probe_get_topology: - * @pr: probe - * - * This is a binary interface for topology values. See also blkid_topology_* - * functions. - * - * This function is independent on blkid_do_[safe,full]probe() and - * blkid_probe_enable_topology() calls. - * - * WARNING: the returned object will be overwritten by the next - * blkid_probe_get_topology() call for the same @pr. If you want to - * use more blkid_topopogy objects in the same time you have to create - * more blkid_probe handlers (see blkid_new_probe()). - * - * Returns: blkid_topopogy, or NULL in case of error. - */ -blkid_topology blkid_probe_get_topology(blkid_probe pr) -{ - return (blkid_topology) blkid_probe_get_binary_data(pr, - &pr->chains[BLKID_CHAIN_TOPLGY]); -} - -/* - * The blkid_do_probe() backend. - */ -static int topology_probe(blkid_probe pr, struct blkid_chain *chn) -{ - size_t i; - - if (!pr || chn->idx < -1) - return -1; - - if (!S_ISBLK(pr->mode)) - return -1; /* nothing, works with block devices only */ - - if (chn->binary) { - DBG(DEBUG_LOWPROBE, printf("initialize topology binary data\n")); - - if (chn->data) - /* reset binary data */ - memset(chn->data, 0, - sizeof(struct blkid_struct_topology)); - else { - chn->data = calloc(1, - sizeof(struct blkid_struct_topology)); - if (!chn->data) - return -1; - } - } - - blkid_probe_chain_reset_vals(pr, chn); - - DBG(DEBUG_LOWPROBE, - printf("--> starting probing loop [TOPOLOGY idx=%d]\n", - chn->idx)); - - i = chn->idx < 0 ? 0 : chn->idx + 1U; - - for ( ; i < ARRAY_SIZE(idinfos); i++) { - const struct blkid_idinfo *id = idinfos[i]; - - chn->idx = i; - - if (id->probefunc) { - DBG(DEBUG_LOWPROBE, printf( - "%s: call probefunc()\n", id->name)); - if (id->probefunc(pr, NULL) != 0) - continue; - } - - if (!topology_is_complete(pr)) - continue; - - /* generic for all probing drivers */ - topology_set_logical_sector_size(pr); - - DBG(DEBUG_LOWPROBE, - printf("<-- leaving probing loop (type=%s) [TOPOLOGY idx=%d]\n", - id->name, chn->idx)); - return 0; - } - - DBG(DEBUG_LOWPROBE, - printf("<-- leaving probing loop (failed) [TOPOLOGY idx=%d]\n", - chn->idx)); - return 1; -} - -static void topology_free(blkid_probe pr __attribute__((__unused__)), - void *data) -{ - free(data); -} - -static int topology_set_value(blkid_probe pr, const char *name, - size_t structoff, unsigned long data) -{ - struct blkid_chain *chn = blkid_probe_get_chain(pr); - - if (!chn) - return -1; - if (!data) - return 0; /* ignore zeros */ - - if (chn->binary) { - memcpy(chn->data + structoff, &data, sizeof(data)); - return 0; - } - return blkid_probe_sprintf_value(pr, name, "%lu", data); -} - - -/* the topology info is complete when we have at least "minimum_io_size" which - * is provided by all blkid topology drivers */ -static int topology_is_complete(blkid_probe pr) -{ - struct blkid_chain *chn = blkid_probe_get_chain(pr); - - if (!chn) - return FALSE; - - if (chn->binary && chn->data) { - blkid_topology tp = (blkid_topology) chn->data; - if (tp->minimum_io_size) - return TRUE; - } - - return __blkid_probe_lookup_value(pr, "MINIMUM_IO_SIZE") ? TRUE : FALSE; -} - -int blkid_topology_set_alignment_offset(blkid_probe pr, int val) -{ - unsigned long xval; - - /* Welcome to Hell. The kernel is able to return -1 as an - * alignment_offset if no compatible sizes and alignments - * exist for stacked devices. - * - * There is no way how libblkid caller can respond to the value -1, so - * we will hide this corner case... - * - * (TODO: maybe we can export an extra boolean value 'misaligned' rather - * then complete hide this problem.) - */ - xval = val < 0 ? 0 : val; - - return topology_set_value(pr, - "ALIGNMENT_OFFSET", - offsetof(struct blkid_struct_topology, alignment_offset), - xval); -} - -int blkid_topology_set_minimum_io_size(blkid_probe pr, unsigned long val) -{ - return topology_set_value(pr, - "MINIMUM_IO_SIZE", - offsetof(struct blkid_struct_topology, minimum_io_size), - val); -} - -int blkid_topology_set_optimal_io_size(blkid_probe pr, unsigned long val) -{ - return topology_set_value(pr, - "OPTIMAL_IO_SIZE", - offsetof(struct blkid_struct_topology, optimal_io_size), - val); -} - -/* BLKSSZGET is provided on all systems since 2.3.3 -- so we don't have to - * waste time with sysfs. - */ -static int topology_set_logical_sector_size(blkid_probe pr) -{ - unsigned long val = blkid_probe_get_sectorsize(pr); - - if (!val) - return -1; - - return topology_set_value(pr, - "LOGICAL_SECTOR_SIZE", - offsetof(struct blkid_struct_topology, logical_sector_size), - val); -} - -int blkid_topology_set_physical_sector_size(blkid_probe pr, unsigned long val) -{ - return topology_set_value(pr, - "PHYSICAL_SECTOR_SIZE", - offsetof(struct blkid_struct_topology, physical_sector_size), - val); -} - -/** - * blkid_topology_get_alignment_offset: - * @tp: topology - * - * Returns: alignment offset in bytes or 0. - */ -unsigned long blkid_topology_get_alignment_offset(blkid_topology tp) -{ - return tp->alignment_offset; -} - -/** - * blkid_topology_get_minimum_io_size: - * @tp: topology - * - * Returns: minimum io size in bytes or 0. - */ -unsigned long blkid_topology_get_minimum_io_size(blkid_topology tp) -{ - return tp->minimum_io_size; -} - -/** - * blkid_topology_get_optimal_io_size - * @tp: topology - * - * Returns: optimal io size in bytes or 0. - */ -unsigned long blkid_topology_get_optimal_io_size(blkid_topology tp) -{ - return tp->optimal_io_size; -} - -/** - * blkid_topology_get_logical_sector_size - * @tp: topology - * - * Returns: logical sector size (BLKSSZGET ioctl) in bytes or 0. - */ -unsigned long blkid_topology_get_logical_sector_size(blkid_topology tp) -{ - return tp->logical_sector_size; -} - -/** - * blkid_topology_get_physical_sector_size - * @tp: topology - * - * Returns: logical sector size (BLKSSZGET ioctl) in bytes or 0. - */ -unsigned long blkid_topology_get_physical_sector_size(blkid_topology tp) -{ - return tp->physical_sector_size; -} - -- cgit v1.2.3