1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2004 Cluster File Systems, Inc.
5 * Author: Nikita Danilov <nikita@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or modify it under the
10 * terms of version 2 of the GNU General Public License as published by the
11 * Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful, but WITHOUT ANY
14 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License along
19 * with Lustre; if not, write to the Free Software Foundation, Inc., 675 Mass
20 * Ave, Cambridge, MA 02139, USA.
22 * Implementation of portable time API for user-level.
26 #ifndef __LIBCFS_USER_PRIM_H__
27 #define __LIBCFS_USER_PRIM_H__
29 #ifndef __LIBCFS_LIBCFS_H__
30 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
33 /* Implementations of portable APIs for liblustre */
36 * liblustre is single-threaded, so most "synchronization" APIs are trivial.
43 #include <sys/signal.h>
45 #include <libcfs/list.h>
46 #include <libcfs/user-time.h>
51 #ifdef HAVE_LIBPTHREAD
57 #define PAGE_SIZE (getpagesize())
58 static __inline__ int getpageshift()
60 int pagesize = getpagesize();
61 #if (__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 4))
62 /* unsigned int is 32 bits on all our architectures */
63 return (__builtin_clz(pagesize) ^ 31);
65 register int pageshift = -1;
66 while (pagesize) { pagesize >>= 1; pageshift++; }
72 #define PAGE_MASK (~(PAGE_SIZE-1))
74 #define PAGE_SHIFT (getpageshift())
79 * Wait Queue. No-op implementation.
82 typedef struct cfs_waitlink {
83 struct list_head sleeping;
87 typedef struct cfs_waitq {
88 struct list_head sleepers;
91 void cfs_waitq_init(struct cfs_waitq *waitq);
92 void cfs_waitlink_init(struct cfs_waitlink *link);
93 void cfs_waitq_add(struct cfs_waitq *waitq, struct cfs_waitlink *link);
94 void cfs_waitq_add_exclusive(struct cfs_waitq *waitq,
95 struct cfs_waitlink *link);
96 void cfs_waitq_forward(struct cfs_waitlink *link, struct cfs_waitq *waitq);
97 void cfs_waitq_del(struct cfs_waitq *waitq, struct cfs_waitlink *link);
98 int cfs_waitq_active(struct cfs_waitq *waitq);
99 void cfs_waitq_signal(struct cfs_waitq *waitq);
100 void cfs_waitq_signal_nr(struct cfs_waitq *waitq, int nr);
101 void cfs_waitq_broadcast(struct cfs_waitq *waitq);
102 void cfs_waitq_wait(struct cfs_waitlink *link, int state);
103 int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, int state, int64_t timeout);
104 #define cfs_schedule_timeout(s, t) \
107 cfs_waitq_timedwait(&l, s, t); \
110 #define CFS_TASK_INTERRUPTIBLE (0)
111 #define CFS_TASK_UNINT (0)
116 * for this moment, liblusre will not rely OST for non-page-aligned write
118 #define LIBLUSTRE_HANDLE_UNALIGNED_PAGE
123 struct list_head list;
124 unsigned long private;
126 /* internally used by liblustre file i/o */
129 #ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
132 struct list_head _node;
135 typedef struct page cfs_page_t;
137 #define CFS_PAGE_SIZE PAGE_SIZE
138 #define CFS_PAGE_SHIFT PAGE_SHIFT
139 #define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
141 cfs_page_t *cfs_alloc_page(unsigned int flags);
142 void cfs_free_page(cfs_page_t *pg);
143 void *cfs_page_address(cfs_page_t *pg);
144 void *cfs_kmap(cfs_page_t *pg);
145 void cfs_kunmap(cfs_page_t *pg);
147 #define cfs_get_page(p) __I_should_not_be_called__(at_all)
148 #define cfs_page_count(p) __I_should_not_be_called__(at_all)
149 #define cfs_page_index(p) ((p)->index)
153 * Inline function, so utils can use them without linking of libcfs
155 #define __ALLOC_ZERO (1 << 2)
156 static inline void *cfs_alloc(size_t nr_bytes, u_int32_t flags)
160 result = malloc(nr_bytes);
161 if (result != NULL && (flags & __ALLOC_ZERO))
162 memset(result, 0, nr_bytes);
166 #define cfs_free(addr) free(addr)
167 #define cfs_alloc_large(nr_bytes) cfs_alloc(nr_bytes, 0)
168 #define cfs_free_large(addr) cfs_free(addr)
170 #define CFS_ALLOC_ATOMIC_TRY (0)
178 #define SLAB_HWCACHE_ALIGN 0
179 #define SLAB_KERNEL 0
183 cfs_mem_cache_create(const char *, size_t, size_t, unsigned long);
184 int cfs_mem_cache_destroy(cfs_mem_cache_t *c);
185 void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp);
186 void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr);
188 typedef int (cfs_read_proc_t)(char *page, char **start, off_t off,
189 int count, int *eof, void *data);
191 struct file; /* forward ref */
192 typedef int (cfs_write_proc_t)(struct file *file, const char *buffer,
193 unsigned long count, void *data);
198 typedef sigset_t cfs_sigset_t;
203 #include <sys/time.h>
206 struct list_head tl_list;
207 void (*function)(unsigned long unused);
212 #define cfs_init_timer(t) do {} while(0)
213 #define cfs_jiffies \
215 unsigned long _ret = 0; \
217 if (gettimeofday(&tv, NULL) == 0) \
222 static inline int cfs_timer_init(cfs_timer_t *l, void (* func)(unsigned long), void *arg)
224 CFS_INIT_LIST_HEAD(&l->tl_list);
226 l->data = (unsigned long)arg;
230 static inline int cfs_timer_is_armed(cfs_timer_t *l)
232 if (cfs_time_before(cfs_jiffies, l->expires))
238 static inline void cfs_timer_arm(cfs_timer_t *l, int thetime)
240 l->expires = thetime;
243 static inline void cfs_timer_disarm(cfs_timer_t *l)
247 static inline long cfs_timer_deadline(cfs_timer_t *l)
253 #define cfs_init_timer(t) do {} while(0)
254 void cfs_timer_init(struct cfs_timer *t, void (*func)(unsigned long), void *arg);
255 void cfs_timer_done(struct cfs_timer *t);
256 void cfs_timer_arm(struct cfs_timer *t, cfs_time_t deadline);
257 void cfs_timer_disarm(struct cfs_timer *t);
258 int cfs_timer_is_armed(struct cfs_timer *t);
260 cfs_time_t cfs_timer_deadline(struct cfs_timer *t);
263 #define in_interrupt() (0)
265 static inline void cfs_pause(cfs_duration_t d)
269 cfs_duration_nsec(d, &s);
273 typedef void cfs_psdev_t;
275 static inline int cfs_psdev_register(cfs_psdev_t *foo)
280 static inline int cfs_psdev_deregister(cfs_psdev_t *foo)
285 #define cfs_lock_kernel() do {} while (0)
286 #define cfs_sigfillset(l) do {} while (0)
287 #define cfs_recalc_sigpending(l) do {} while (0)
288 #define cfs_kernel_thread(l,m,n) LBUG()
290 #ifdef HAVE_LIBPTHREAD
291 typedef int (*cfs_thread_t)(void *);
292 int cfs_create_thread(cfs_thread_t func, void *arg);
294 #define cfs_create_thread(l,m) LBUG()
297 int cfs_parse_int_tunable(int *value, char *name);
298 uid_t cfs_curproc_uid(void);
300 #define LIBCFS_REALLOC(ptr, size) realloc(ptr, size)
302 #define cfs_online_cpus() sysconf(_SC_NPROCESSORS_ONLN)
304 // static inline void local_irq_save(unsigned long flag) {return;}
305 // static inline void local_irq_restore(unsigned long flag) {return;}
308 CFS_STACK_TRACE_DEPTH = 16
311 struct cfs_stack_trace {
312 void *frame[CFS_STACK_TRACE_DEPTH];
318 #define do_div(a,b) \
320 unsigned long remainder;\
321 remainder = (a) % (b); \
329 /* __LIBCFS_USER_PRIM_H__ */
333 * c-indentation-style: "K&R"