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-rw-r--r--src/spdk/lib/util/fd.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/spdk/lib/util/fd.c b/src/spdk/lib/util/fd.c
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+++ b/src/spdk/lib/util/fd.c
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) Intel Corporation.
+ * 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 "spdk/stdinc.h"
+
+#include "spdk/fd.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
+spdk_fd_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
+
+ return 0;
+}
+
+uint64_t
+spdk_fd_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;
+}