libzutil

lib/libzutil/os/macos/zutil_device_path_os.c

@@ -0,0 +1,208 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/stat.h>
+#include <sys/efi_partition.h>
+
+#include <libzutil.h>
+
+/*
+ * Note: The caller must free the returned string.
+ */
+char *
+zfs_strip_partition(const char *dev)
+{
+	unsigned int disk, slice;
+	char *partless;
+	char whole_disk[MAXPATHLEN];
+
+	partless = strdup(dev);
+
+	/* Ends with "diskNsP" - where 'N' and 'P' are integers - strip sP */
+	if (sscanf(partless, "disk%us%u", &disk, &slice) == 2) {
+		char *r;
+		r = strrchr(partless, 's');
+		if (r != NULL)
+			*r = 0;
+	} else if ((sscanf(partless, "%[^:]:%u", whole_disk, &slice)) == 2) {
+		char *r;
+		r = strrchr(partless, ':');
+		if (r != NULL) {
+			if (strchr(partless, '@')) { // by-path
+				if (slice == 1)
+					r[1] = '0';
+			} else // by-serial
+				*r = 0;
+		}
+	}
+
+	return (partless);
+}
+
+int
+zfs_append_partition(char *path, size_t max_len)
+{
+	int len = strlen(path);
+	char dpath[max_len];
+	if (strncmp(path, "/var/", 5) == 0) {
+		(void) strlcpy(dpath, "/private", max_len);
+		(void) strlcat(dpath, path, max_len);
+	} else
+		strlcpy(dpath, path, max_len);
+
+
+	if (strncmp(dpath, "/private/var/run/disk/by-id", 27) == 0) {
+		return (len);
+	} else if (strncmp(dpath, "/private/var/run/disk/by-path", 29) == 0) {
+		if (path[len - 1] == '0' &&
+		    path[len - 2] == ':')
+			path[len - 1] = '1';
+
+	} else if (strncmp(dpath, "/private/var/run/disk/by-serial", 31) == 0) {
+		if (len + 2 >= max_len)
+			return (-1);
+
+		if (strchr(path, ':') == NULL) {
+			(void) strcat(path, ":1");
+			len += 2;
+		}
+	} else {
+
+		if (len + 2 >= max_len)
+			return (-1);
+
+		if (isdigit(path[len-1])) {
+			(void) strcat(path, "s1");
+			len += 2;
+		} else {
+			(void) strcat(path, "1");
+			len += 1;
+		}
+	}
+
+	return (len);
+}
+
+/*
+ * Strip the path from a device name.
+ * On FreeBSD we only want to remove "/dev/" from the beginning of
+ * paths if present.
+ */
+const char *
+zfs_strip_path(const char *path)
+{
+	char *r;
+	r = strrchr(path, '/');
+	if (r == NULL)
+		return (r);
+	return (&r[1]);
+}
+
+char *
+zfs_get_underlying_path(const char *dev_name)
+{
+
+	if (dev_name == NULL)
+		return (NULL);
+
+	return (realpath(dev_name, NULL));
+}
+
+boolean_t
+zfs_dev_is_whole_disk(const char *dev_name)
+{
+	struct dk_gpt *label;
+	int fd;
+
+	if ((fd = open(dev_name, O_RDONLY | O_DIRECT)) < 0)
+		return (B_FALSE);
+
+	if (efi_alloc_and_init(fd, EFI_NUMPAR, &label) != 0) {
+		(void) close(fd);
+		return (B_FALSE);
+	}
+
+	efi_free(label);
+	(void) close(fd);
+
+	return (B_TRUE);
+}
+
+/*
+ * Wait up to timeout_ms for udev to set up the device node.  The device is
+ * considered ready when libudev determines it has been initialized, all of
+ * the device links have been verified to exist, and it has been allowed to
+ * settle.  At this point the device the device can be accessed reliably.
+ * Depending on the complexity of the udev rules this process could take
+ * several seconds.
+ */
+int
+zpool_label_disk_wait(const char *path, int timeout_ms)
+{
+	int settle_ms = 50;
+	long sleep_ms = 10;
+	hrtime_t start, settle;
+	struct stat64 statbuf;
+
+	start = gethrtime();
+	settle = 0;
+
+	do {
+		errno = 0;
+		if ((stat64(path, &statbuf) == 0) && (errno == 0)) {
+			if (settle == 0)
+				settle = gethrtime();
+			else if (NSEC2MSEC(gethrtime() - settle) >= settle_ms)
+				return (0);
+		} else if (errno != ENOENT) {
+			return (errno);
+		}
+
+		usleep(sleep_ms * MILLISEC);
+	} while (NSEC2MSEC(gethrtime() - start) < timeout_ms);
+
+	return (ENODEV);
+}
+
+boolean_t
+is_mpath_whole_disk(const char *path)
+{
+	(void) path;
+	return (B_FALSE);
+}
+
+/*
+ * Return B_TRUE if device is a device mapper or multipath device.
+ * Return B_FALSE if not.
+ */
+boolean_t
+zfs_dev_is_dm(const char *dev_name)
+{
+	(void) dev_name;
+	return (B_FALSE);
+}