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-rw-r--r--src/os/filestore/os_xattr.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/src/os/filestore/os_xattr.c b/src/os/filestore/os_xattr.c
new file mode 100644
index 000000000..8de0e1d92
--- /dev/null
+++ b/src/os/filestore/os_xattr.c
@@ -0,0 +1,278 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 Stanislav Sedov <stas@FreeBSD.org>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ */
+
+#if defined(__FreeBSD__)
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <sys/types.h>
+#include <sys/extattr.h>
+#elif defined(__linux__)
+#include <sys/types.h>
+#include <sys/xattr.h>
+#elif defined(__APPLE__)
+#include <errno.h>
+#include <sys/xattr.h>
+#else
+#error "Your system is not supported!"
+#endif
+
+#include "os_xattr.h"
+
+/*
+ * Sets extended attribute on a file.
+ * Returns 0 on success, -1 on failure.
+ */
+int
+ceph_os_setxattr(const char *path, const char *name,
+ const void *value, size_t size)
+{
+ int error = -1;
+
+#if defined(__FreeBSD__)
+ error = extattr_set_file(path, EXTATTR_NAMESPACE_USER, name, value,
+ size);
+ if (error > 0)
+ error = 0;
+#elif defined(__linux__)
+ error = setxattr(path, name, value, size, 0);
+#elif defined(__APPLE__)
+ error = setxattr(path, name, value, size, 0 /* position */, 0);
+#endif
+
+ return (error);
+}
+
+int
+ceph_os_fsetxattr(int fd, const char *name, const void *value,
+ size_t size)
+{
+ int error = -1;
+
+#if defined(__FreeBSD__)
+ error = extattr_set_fd(fd, EXTATTR_NAMESPACE_USER, name, value, size);
+ if (error > 0)
+ error = 0;
+#elif defined(__linux__)
+ error = fsetxattr(fd, name, value, size, 0);
+#elif defined(__APPLE__)
+ error = fsetxattr(fd, name, value, size, 0, 0 /* no options should be identical to Linux */ );
+#endif
+
+ return (error);
+}
+
+ssize_t
+ceph_os_getxattr(const char *path, const char *name,
+void *value, size_t size)
+{
+ ssize_t error = -1;
+
+#if defined(__FreeBSD__)
+ if (value == NULL || size == 0) {
+ error = extattr_get_file(path, EXTATTR_NAMESPACE_USER, name, value,
+ size);
+ } else {
+ error = extattr_get_file(path, EXTATTR_NAMESPACE_USER, name, NULL,
+ 0);
+ if (error > 0) {
+ if (error > size) {
+ errno = ERANGE;
+ error = -1;
+ } else {
+ error = extattr_get_file(path, EXTATTR_NAMESPACE_USER,
+ name, value, size);
+ }
+ }
+ }
+#elif defined(__linux__)
+ error = getxattr(path, name, value, size);
+#elif defined(__APPLE__)
+ error = getxattr(path, name, value, size, 0 /* position */, 0);
+ /* ENOATTR and ENODATA have different values */
+ if (error < 0 && errno == ENOATTR)
+ errno = ENODATA;
+#endif
+
+ return (error);
+}
+
+ssize_t
+ceph_os_fgetxattr(int fd, const char *name, void *value,
+ size_t size)
+{
+ ssize_t error = -1;
+
+#if defined(__FreeBSD__)
+ if (value == NULL || size == 0) {
+ error = extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, name, value,
+ size);
+ } else {
+ error = extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, name, NULL,
+ 0);
+ if (error > 0) {
+ if (error > size) {
+ errno = ERANGE;
+ error = -1;
+ } else {
+ error = extattr_get_fd(fd, EXTATTR_NAMESPACE_USER,
+ name, value, size);
+ }
+ }
+ }
+#elif defined(__linux__)
+ error = fgetxattr(fd, name, value, size);
+#elif defined(__APPLE__)
+ error = fgetxattr(fd, name, value, size, 0, 0 /* no options */);
+ /* ENOATTR and ENODATA have different values */
+ if (error < 0 && errno == ENOATTR)
+ errno = ENODATA;
+#endif
+
+ return (error);
+}
+
+ssize_t
+ceph_os_listxattr(const char *path, char *list, size_t size)
+{
+ ssize_t error = -1;
+
+#if defined(__FreeBSD__)
+ /*
+ * XXX. The format of the list FreeBSD returns differs
+ * from the Linux ones. We have to perform the conversion. :-(
+ */
+ char *newlist, *p, *p1;
+
+ if (size != 0) {
+ newlist = malloc(size);
+ if (newlist != NULL) {
+ error = extattr_list_file(path, EXTATTR_NAMESPACE_USER,
+ newlist, size);
+ if (error > 0) {
+ p = newlist;
+ p1 = list;
+ while ((p - newlist) < error) {
+ uint8_t len = *(uint8_t *)p;
+ p++;
+ if ((p + len - newlist) > error)
+ break;
+ if (len > 0) {
+ bcopy(p, p1, len);
+ p += len;
+ p1 += len;
+ *p1++ = '\0';
+ }
+ }
+ error = p1 - list;
+ }
+ free(newlist);
+ }
+ } else {
+ error = extattr_list_file(path, EXTATTR_NAMESPACE_USER,
+ list, size);
+ }
+#elif defined(__linux__)
+ error = listxattr(path, list, size);
+#elif defined(__APPLE__)
+ error = listxattr(path, list, size, 0);
+#endif
+
+ return (error);
+}
+
+ssize_t
+ceph_os_flistxattr(int fd, char *list, size_t size)
+{
+ ssize_t error = -1;
+
+#if defined(__FreeBSD__)
+ /*
+ * XXX. The format of the list FreeBSD returns differs
+ * from the Linux ones. We have to perform the conversion. :-(
+ */
+ char *newlist, *p, *p1;
+
+ if (size != 0) {
+ newlist = malloc(size);
+ if (newlist != NULL) {
+ error = extattr_list_fd(fd, EXTATTR_NAMESPACE_USER,
+ newlist, size);
+ if (error > 0) {
+ p = newlist;
+ p1 = list;
+ while ((p - newlist) < error) {
+ uint8_t len = *(uint8_t *)p;
+ p++;
+ if ((p + len - newlist) > error)
+ break;
+ if (len > 0) {
+ bcopy(p, p1, len);
+ p += len;
+ p1 += len;
+ *p1++ = '\0';
+ }
+ }
+ error = p1 - list;
+ }
+ free(newlist);
+ }
+ } else {
+ error = extattr_list_fd(fd, EXTATTR_NAMESPACE_USER,
+ list, size);
+ }
+#elif defined(__linux__)
+ error = flistxattr(fd, list, size);
+#elif defined(__APPLE__)
+ error = flistxattr(fd, list, size, 0);
+#endif
+
+ return (error);
+}
+
+int
+ceph_os_removexattr(const char *path, const char *name)
+{
+ int error = -1;
+
+#if defined(__FreeBSD__)
+ error = extattr_delete_file(path, EXTATTR_NAMESPACE_USER, name);
+#elif defined(__linux__)
+ error = removexattr(path, name);
+#elif defined(__APPLE__)
+ error = removexattr(path, name, 0);
+ /* ENOATTR and ENODATA have different values */
+ if (error < 0 && errno == ENOATTR)
+ errno = ENODATA;
+#endif
+
+ return (error);
+}
+
+int
+ceph_os_fremovexattr(int fd, const char *name)
+{
+ int error = -1;
+
+#if defined(__FreeBSD__)
+ error = extattr_delete_fd(fd, EXTATTR_NAMESPACE_USER, name);
+#elif defined(__linux__)
+ error = fremovexattr(fd, name);
+#elif defined(__APPLE__)
+ error = fremovexattr(fd, name, 0);
+ /* ENOATTR and ENODATA have different values */
+ if (error < 0 && errno == ENOATTR)
+ errno = ENODATA;
+#endif
+
+ return (error);
+}
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