util: add file size and block size functions (aaf0555e) · Commits · Public Repositories / spdk

include/spdk/file.h

0 → 100644

+42 −0

Original line number	Diff line number	Diff line
		/*-
		* BSD LICENSE
		*
		* Copyright(c) 2015 Intel Corporation. All rights reserved.
		* 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.
		* * Neither the name of Intel Corporation nor the names of its
		* contributors may be used to endorse or promote products derived
		* from this software without specific prior written permission.
		*
		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		* "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 COPYRIGHT
		* OWNER OR CONTRIBUTORS 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.
		*/

		#ifndef SPDK_FILE_H
		#define SPDK_FILE_H

		#include <stdint.h>

		uint64_t file_get_size(int fd);
		uint32_t dev_get_blocklen(int fd);

		#endif

lib/util/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -35,7 +35,7 @@ include $(SPDK_ROOT_DIR)/mk/spdk.common.mk

		CFLAGS += $(DPDK_INC)

		C_SRCS = string.c pci.c
		C_SRCS = file.c string.c pci.c

		C_OBJS := $(patsubst %.c,%.o,$(C_SRCS))

lib/util/file.c

0 → 100644

+106 −0

Original line number	Diff line number	Diff line
		/*-
		* BSD LICENSE
		*
		* Copyright(c) 2015 Intel Corporation. All rights reserved.
		* 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.
		* * Neither the name of Intel Corporation nor the names of its
		* contributors may be used to endorse or promote products derived
		* from this software without specific prior written permission.
		*
		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		* "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 COPYRIGHT
		* OWNER OR CONTRIBUTORS 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.
		*/

		#include <sys/ioctl.h>
		#include <sys/types.h>
		#include <sys/stat.h>
		#include <unistd.h>
		#include <stdint.h>

		#ifdef __linux__
		#include <linux/fs.h>
		#endif

		static uint64_t
		dev_get_size(int fd)
		{
		#if defined(DIOCGMEDIASIZE) /* FreeBSD */
		off_t size;

		if (ioctl(fd, DIOCGMEDIASIZE, &size) == 0) {
		return size;
		}
		#elif defined(__linux__) && defined(BLKGETSIZE64)
		uint64_t size;

		if (ioctl(fd, BLKGETSIZE64, &size) == 0) {
		return size;
		}
		#endif

		return 0;
		}

		uint32_t
		dev_get_blocklen(int fd)
		{
		#if defined(DKIOCGETBLOCKSIZE) /* FreeBSD */
		uint32_t blocklen;

		if (ioctl(fd, DKIOCGETBLOCKSIZE, &blocklen) != 0) {
		return blocklen;
		}
		#elif defined(__linux__) && defined(BLKSSZGET)
		uint32_t blocklen;

		if (ioctl(fd, BLKSSZGET, &blocklen) != 0) {
		return blocklen;
		}
		#endif

		/* Assume 512 if none of the other methods worked */
		return 512;
		}

		uint64_t
		file_get_size(int fd)
		{
		struct stat st;

		if (fstat(fd, &st) != 0) {
		return 0;
		}

		if (S_ISLNK(st.st_mode)) {
		return 0;
		}

		if (S_ISBLK(st.st_mode) \|\| S_ISCHR(st.st_mode)) {
		return dev_get_size(fd);
		} else if (S_ISREG(st.st_mode)) {
		return st.st_size;
		}

		/* Not REG, CHR or BLK */
		return 0;
		}