*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2014, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef __LIBCFS_LINUX_MISC_H__
#define __LIBCFS_LINUX_MISC_H__
-#ifdef HAVE_SYSCTL_CTLNAME
-#define INIT_CTL_NAME .ctl_name = CTL_UNNUMBERED,
-#define INIT_STRATEGY .strategy = &sysctl_intvec,
+#include <linux/fs.h>
+/* Since Commit 2f8b544477e6 ("block,fs: untangle fs.h and blk_types.h")
+ * fs.h doesn't include blk_types.h, but we need it.
+ */
+#include <linux/blk_types.h>
+#include <linux/mutex.h>
+#include <linux/user_namespace.h>
+#include <linux/uio.h>
+
+#ifndef HAVE_IOV_ITER_TYPE
+#ifdef HAVE_IOV_ITER_HAS_TYPE_MEMBER
+#define iter_is_iovec(iter) ((iter)->type & ITER_IOVEC)
+#define iov_iter_is_kvec(iter) ((iter)->type & ITER_KVEC)
+#define iov_iter_is_bvec(iter) ((iter)->type & ITER_BVEC)
+#define iov_iter_is_pipe(iter) ((iter)->type & ITER_PIPE)
+#define iov_iter_is_discard(iter) ((iter)->type & ITER_DISCARD)
#else
-#define INIT_CTL_NAME
-#define INIT_STRATEGY
+#define iter_is_iovec(iter) 1
+#define iov_iter_is_kvec(iter) 0
+#define iov_iter_is_bvec(iter) 0
+#define iov_iter_is_pipe(iter) 0
+#define iov_iter_is_discard(iter) 0
#endif
+#endif /* HAVE_IOV_ITER_TYPE */
+
+int cfs_get_environ(const char *key, char *value, int *val_len);
-#ifndef HAVE_KSTRTOUL
-static inline int kstrtoul(const char *s, unsigned int base, unsigned long *res)
+int cfs_kernel_write(struct file *filp, const void *buf, size_t count,
+ loff_t *pos);
+ssize_t cfs_kernel_read(struct file *file, void *buf, size_t count,
+ loff_t *pos);
+
+/*
+ * For RHEL6 struct kernel_parm_ops doesn't exist. Also
+ * the arguments for .set and .get take different
+ * parameters which is handled below
+ */
+#ifdef HAVE_KERNEL_PARAM_OPS
+#define cfs_kernel_param_arg_t const struct kernel_param
+#else
+#define cfs_kernel_param_arg_t struct kernel_param_ops
+#define kernel_param_ops kernel_param
+#endif /* ! HAVE_KERNEL_PARAM_OPS */
+
+#ifndef HAVE_KERNEL_PARAM_LOCK
+static inline void kernel_param_unlock(struct module *mod)
+{
+ __kernel_param_unlock();
+}
+
+static inline void kernel_param_lock(struct module *mod)
{
- char *end = (char *)s;
+ __kernel_param_lock();
+}
+#endif /* ! HAVE_KERNEL_PARAM_LOCK */
- *res = simple_strtoul(s, &end, base);
- if (end - s == 0)
- return -EINVAL;
- return 0;
+int cfs_apply_workqueue_attrs(struct workqueue_struct *wq,
+ const struct workqueue_attrs *attrs);
+
+#ifndef HAVE_KSTRTOBOOL_FROM_USER
+
+#define kstrtobool strtobool
+
+int kstrtobool_from_user(const char __user *s, size_t count, bool *res);
+#endif /* HAVE_KSTRTOBOOL_FROM_USER */
+
+#ifndef HAVE_KREF_READ
+static inline int kref_read(const struct kref *kref)
+{
+ return atomic_read(&kref->refcount);
}
-#endif /* !HAVE_KSTRTOUL */
+#endif /* HAVE_KREF_READ */
+#ifdef HAVE_FORCE_SIG_WITH_TASK
+#define cfs_force_sig(sig, task) force_sig((sig), (task))
+#else
+#define cfs_force_sig(sig, task) \
+do { \
+ unsigned long flags; \
+ \
+ spin_lock_irqsave(&task->sighand->siglock, flags); \
+ task->sighand->action[sig - 1].sa.sa_handler = SIG_DFL; \
+ send_sig(sig, task, 1); \
+ spin_unlock_irqrestore(&task->sighand->siglock, flags); \
+} while (0)
#endif
+
+void cfs_arch_init(void);
+
+#ifndef container_of_safe
+/**
+ * container_of_safe - cast a member of a structure out to the containing structure
+ * @ptr: the pointer to the member.
+ * @type: the type of the container struct this is embedded in.
+ * @member: the name of the member within the struct.
+ *
+ * If IS_ERR_OR_NULL(ptr), ptr is returned unchanged.
+ *
+ * Note: Copied from Linux 5.6, with BUILD_BUG_ON_MSG section removed.
+ */
+#define container_of_safe(ptr, type, member) ({ \
+ void *__mptr = (void *)(ptr); \
+ IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) : \
+ ((type *)(__mptr - offsetof(type, member))); })
+#endif
+
+#endif /* __LIBCFS_LINUX_MISC_H__ */