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 * Wait Queue. No-op implementation.
60 typedef struct cfs_waitlink {
61 struct list_head sleeping;
65 typedef struct cfs_waitq {
66 struct list_head sleepers;
69 void cfs_waitq_init(struct cfs_waitq *waitq);
70 void cfs_waitlink_init(struct cfs_waitlink *link);
71 void cfs_waitq_add(struct cfs_waitq *waitq, struct cfs_waitlink *link);
72 void cfs_waitq_add_exclusive(struct cfs_waitq *waitq,
73 struct cfs_waitlink *link);
74 void cfs_waitq_forward(struct cfs_waitlink *link, struct cfs_waitq *waitq);
75 void cfs_waitq_del(struct cfs_waitq *waitq, struct cfs_waitlink *link);
76 int cfs_waitq_active(struct cfs_waitq *waitq);
77 void cfs_waitq_signal(struct cfs_waitq *waitq);
78 void cfs_waitq_signal_nr(struct cfs_waitq *waitq, int nr);
79 void cfs_waitq_broadcast(struct cfs_waitq *waitq);
80 void cfs_waitq_wait(struct cfs_waitlink *link, int state);
81 int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, int state, int64_t timeout);
82 #define cfs_schedule_timeout(s, t) \
85 cfs_waitq_timedwait(&l, s, t); \
88 #define CFS_TASK_INTERRUPTIBLE (0)
89 #define CFS_TASK_UNINT (0)
94 * for this moment, liblusre will not rely OST for non-page-aligned write
96 #define LIBLUSTRE_HANDLE_UNALIGNED_PAGE
101 struct list_head list;
102 unsigned long private;
104 /* internally used by liblustre file i/o */
107 #ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
110 struct list_head _node;
113 typedef struct page cfs_page_t;
118 #define CFS_PAGE_SHIFT 12
119 #define CFS_PAGE_SIZE (1UL << CFS_PAGE_SHIFT)
120 #define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
124 #define CFS_PAGE_SIZE PAGE_SIZE
125 #define CFS_PAGE_SHIFT PAGE_SHIFT
126 #define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
130 cfs_page_t *cfs_alloc_page(unsigned int flags);
131 void cfs_free_page(cfs_page_t *pg);
132 void *cfs_page_address(cfs_page_t *pg);
133 void *cfs_kmap(cfs_page_t *pg);
134 void cfs_kunmap(cfs_page_t *pg);
136 #define cfs_get_page(p) __I_should_not_be_called__(at_all)
137 #define cfs_page_count(p) __I_should_not_be_called__(at_all)
138 #define cfs_page_index(p) ((p)->index)
142 * Inline function, so utils can use them without linking of libcfs
144 #define __ALLOC_ZERO (1 << 2)
145 static inline void *cfs_alloc(size_t nr_bytes, u_int32_t flags)
149 result = malloc(nr_bytes);
150 if (result != NULL && (flags & __ALLOC_ZERO))
151 memset(result, 0, nr_bytes);
155 #define cfs_free(addr) free(addr)
156 #define cfs_alloc_large(nr_bytes) cfs_alloc(nr_bytes, 0)
157 #define cfs_free_large(addr) cfs_free(addr)
159 #define CFS_ALLOC_ATOMIC_TRY (0)
167 #define SLAB_HWCACHE_ALIGN 0
168 #define SLAB_KERNEL 0
172 cfs_mem_cache_create(const char *, size_t, size_t, unsigned long);
173 int cfs_mem_cache_destroy(cfs_mem_cache_t *c);
174 void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp);
175 void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr);
177 typedef int (cfs_read_proc_t)(char *page, char **start, off_t off,
178 int count, int *eof, void *data);
180 struct file; /* forward ref */
181 typedef int (cfs_write_proc_t)(struct file *file, const char *buffer,
182 unsigned long count, void *data);
187 typedef sigset_t cfs_sigset_t;
192 #include <sys/time.h>
195 struct list_head tl_list;
196 void (*function)(unsigned long unused);
201 #define cfs_init_timer(t) do {} while(0)
202 #define cfs_jiffies \
204 unsigned long _ret = 0; \
206 if (gettimeofday(&tv, NULL) == 0) \
211 static inline int cfs_timer_init(cfs_timer_t *l, void (* func)(unsigned long), void *arg)
213 CFS_INIT_LIST_HEAD(&l->tl_list);
215 l->data = (unsigned long)arg;
219 static inline int cfs_timer_is_armed(cfs_timer_t *l)
221 if (cfs_time_before(cfs_jiffies, l->expires))
227 static inline void cfs_timer_arm(cfs_timer_t *l, int thetime)
229 l->expires = thetime;
232 static inline void cfs_timer_disarm(cfs_timer_t *l)
236 static inline long cfs_timer_deadline(cfs_timer_t *l)
242 #define cfs_init_timer(t) do {} while(0)
243 void cfs_timer_init(struct cfs_timer *t, void (*func)(unsigned long), void *arg);
244 void cfs_timer_done(struct cfs_timer *t);
245 void cfs_timer_arm(struct cfs_timer *t, cfs_time_t deadline);
246 void cfs_timer_disarm(struct cfs_timer *t);
247 int cfs_timer_is_armed(struct cfs_timer *t);
249 cfs_time_t cfs_timer_deadline(struct cfs_timer *t);
252 #define in_interrupt() (0)
254 static inline void cfs_pause(cfs_duration_t d)
258 cfs_duration_nsec(d, &s);
262 typedef void cfs_psdev_t;
264 static inline int cfs_psdev_register(cfs_psdev_t *foo)
269 static inline int cfs_psdev_deregister(cfs_psdev_t *foo)
274 #define cfs_lock_kernel() do {} while (0)
275 #define cfs_sigfillset(l) do {} while (0)
276 #define cfs_recalc_sigpending(l) do {} while (0)
277 #define cfs_kernel_thread(l,m,n) LBUG()
279 #ifdef HAVE_LIBPTHREAD
280 typedef int (*cfs_thread_t)(void *);
281 int cfs_create_thread(cfs_thread_t func, void *arg);
283 #define cfs_create_thread(l,m) LBUG()
286 int cfs_parse_int_tunable(int *value, char *name);
287 uid_t cfs_curproc_uid(void);
289 #define LIBCFS_REALLOC(ptr, size) realloc(ptr, size)
291 #define cfs_online_cpus() sysconf(_SC_NPROCESSORS_ONLN)
293 // static inline void local_irq_save(unsigned long flag) {return;}
294 // static inline void local_irq_restore(unsigned long flag) {return;}
297 CFS_STACK_TRACE_DEPTH = 16
300 struct cfs_stack_trace {
301 void *frame[CFS_STACK_TRACE_DEPTH];
307 #define do_div(a,b) \
309 unsigned long remainder;\
310 remainder = (a) % (b); \
318 /* __LIBCFS_USER_PRIM_H__ */
322 * c-indentation-style: "K&R"