*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*/
#ifndef __LIBCFS_LINUX_MISC_H__
#define __LIBCFS_LINUX_MISC_H__
#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>
-
-#ifdef HAVE_SYSCTL_CTLNAME
-#define INIT_CTL_NAME .ctl_name = CTL_UNNUMBERED,
-#define INIT_STRATEGY .strategy = &sysctl_intvec,
+#include <linux/uio.h>
+#include <linux/kallsyms.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 */
-#ifndef HAVE_MODULE_PARAM_LOCKING
-static DEFINE_MUTEX(param_lock);
-#endif
-
-#ifndef HAVE_UIDGID_HEADER
-
-#ifndef _LINUX_UIDGID_H
-#define _LINUX_UIDGID_H
-
-typedef uid_t kuid_t;
-typedef gid_t kgid_t;
-
-#define INVALID_UID -1
-#define INVALID_GID -1
-
-#define GLOBAL_ROOT_UID 0
-#define GLOBAL_ROOT_GID 0
-
-static inline uid_t __kuid_val(kuid_t uid)
-{
- return uid;
-}
-
-static inline gid_t __kgid_val(kgid_t gid)
-{
- return gid;
-}
-
-static inline kuid_t make_kuid(struct user_namespace *from, uid_t uid)
-{
- return uid;
-}
-
-static inline kgid_t make_kgid(struct user_namespace *from, gid_t gid)
-{
- return gid;
-}
-
-static inline uid_t from_kuid(struct user_namespace *to, kuid_t uid)
-{
- return uid;
-}
-
-static inline gid_t from_kgid(struct user_namespace *to, kgid_t gid)
-{
- return gid;
-}
-
-static inline bool uid_eq(kuid_t left, kuid_t right)
-{
- return left == right;
-}
-
-static inline bool uid_valid(kuid_t uid)
-{
- return uid != (typeof(uid))INVALID_UID;
-}
-
-static inline bool gid_valid(kgid_t gid)
-{
- return gid != (typeof(gid))INVALID_GID;
-}
-#endif /* _LINUX_UIDGID_H */
-
-#endif
-
-int cfs_get_environ(const char *key, char *value, int *val_len);
-
-#ifndef HAVE_WAIT_QUEUE_ENTRY
-#define wait_queue_entry_t wait_queue_t
-#endif
-
-int cfs_kernel_write(struct file *filp, char *buf, size_t count, loff_t *pos);
+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
#ifndef HAVE_KERNEL_PARAM_LOCK
static inline void kernel_param_unlock(struct module *mod)
{
-#ifndef HAVE_MODULE_PARAM_LOCKING
- mutex_unlock(¶m_lock);
-#else
__kernel_param_unlock();
-#endif
}
static inline void kernel_param_lock(struct module *mod)
{
-#ifndef HAVE_MODULE_PARAM_LOCKING
- mutex_lock(¶m_lock);
-#else
__kernel_param_lock();
-#endif
}
#endif /* ! HAVE_KERNEL_PARAM_LOCK */
-#ifndef HAVE_KSTRTOUL
-static inline int kstrtoul(const char *s, unsigned int base, unsigned long *res)
-{
- char *end = (char *)s;
-
- *res = simple_strtoul(s, &end, base);
- if (end - s == 0)
- return -EINVAL;
- return 0;
-}
-#endif /* !HAVE_KSTRTOUL */
+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_MATCH_WILDCARD
+bool match_wildcard(const char *pattern, const char *str);
+#endif /* !HAVE_MATCH_WILDCARD */
+
+#ifndef HAVE_KREF_READ
+static inline int kref_read(const struct kref *kref)
+{
+ return atomic_read(&kref->refcount);
+}
+#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
+
+/*
+ * Linux v4.15-rc2-5-g4229a470175b added sizeof_field()
+ * Linux v5.5-rc4-1-g1f07dcc459d5 removed FIELD_SIZEOF()
+ * Proved a sizeof_field in terms of FIELD_SIZEOF() when one is not provided
+ */
+#ifndef sizeof_field
+#define sizeof_field(type, member) FIELD_SIZEOF(type, member)
#endif
+
+#ifndef HAVE_TASK_IS_RUNNING
+#define task_is_running(task) (task->state == TASK_RUNNING)
#endif
+
+#ifdef HAVE_KALLSYMS_LOOKUP_NAME
+static inline void *cfs_kallsyms_lookup_name(const char *name)
+{
+ return (void *)kallsyms_lookup_name(name);
+}
+#else
+static inline void *cfs_kallsyms_lookup_name(const char *name)
+{
+ return NULL;
+}
+#endif
+
+#endif /* __LIBCFS_LINUX_MISC_H__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff