1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * libcfs/include/libcfs/posix/libcfs.h
38 * Defines for posix userspace.
40 * Author: Robert Read <rread@sun.com>
43 #ifndef __LIBCFS_POSIX_LIBCFS_H__
44 #define __LIBCFS_POSIX_LIBCFS_H__
47 #include <sys/errno.h>
58 #include <sys/ioctl.h>
59 #include <sys/signal.h>
66 #include <sys/socket.h>
67 #include <sys/utsname.h>
78 #ifdef HAVE_LIBPTHREAD
82 #if defined(HAVE_SYS_TYPES_H)
83 #include <sys/types.h>
86 #ifdef HAVE_SYS_USER_H
87 # include <sys/user.h>
98 #include <libcfs/list.h>
99 #include <libcfs/posix/posix-types.h>
100 #include <libcfs/user-time.h>
101 #include <libcfs/user-prim.h>
102 #include <libcfs/user-mem.h>
103 #include <libcfs/user-lock.h>
104 #include <libcfs/user-tcpip.h>
105 #include <libcfs/posix/posix-wordsize.h>
106 #include <libcfs/user-bitops.h>
107 #include <libcfs/posix/posix-kernelcomm.h>
109 # define do_gettimeofday(tv) gettimeofday(tv, NULL);
110 typedef unsigned long long cycles_t;
112 #define IS_ERR(a) ((unsigned long)(a) > (unsigned long)-1000L)
113 #define PTR_ERR(a) ((long)(a))
114 #define ERR_PTR(a) ((void*)((long)(a)))
116 /* this goes in posix-fs.h */
117 #include <sys/mount.h>
123 typedef struct file cfs_file_t;
124 typedef struct dentry cfs_dentry_t;
126 typedef struct dirent64 cfs_dirent_t;
130 /* Userpace byte flipping */
132 # include <byteswap.h>
133 # define __swab16(x) bswap_16(x)
134 # define __swab32(x) bswap_32(x)
135 # define __swab64(x) bswap_64(x)
136 # define __swab16s(x) do {*(x) = bswap_16(*(x));} while (0)
137 # define __swab32s(x) do {*(x) = bswap_32(*(x));} while (0)
138 # define __swab64s(x) do {*(x) = bswap_64(*(x));} while (0)
139 # if __BYTE_ORDER == __LITTLE_ENDIAN
140 # define le16_to_cpu(x) (x)
141 # define cpu_to_le16(x) (x)
142 # define le32_to_cpu(x) (x)
143 # define cpu_to_le32(x) (x)
144 # define le64_to_cpu(x) (x)
145 # define cpu_to_le64(x) (x)
147 # define be16_to_cpu(x) bswap_16(x)
148 # define cpu_to_be16(x) bswap_16(x)
149 # define be32_to_cpu(x) bswap_32(x)
150 # define cpu_to_be32(x) bswap_32(x)
151 # define be64_to_cpu(x) bswap_64(x)
152 # define cpu_to_be64(x) bswap_64(x)
154 # if __BYTE_ORDER == __BIG_ENDIAN
155 # define le16_to_cpu(x) bswap_16(x)
156 # define cpu_to_le16(x) bswap_16(x)
157 # define le32_to_cpu(x) bswap_32(x)
158 # define cpu_to_le32(x) bswap_32(x)
159 # define le64_to_cpu(x) bswap_64(x)
160 # define cpu_to_le64(x) bswap_64(x)
162 # define be16_to_cpu(x) (x)
163 # define cpu_to_be16(x) (x)
164 # define be32_to_cpu(x) (x)
165 # define cpu_to_be32(x) (x)
166 # define be64_to_cpu(x) (x)
167 # define cpu_to_be64(x) (x)
170 # error "Unknown byte order"
171 # endif /* __BIG_ENDIAN */
172 # endif /* __LITTLE_ENDIAN */
174 #define __cpu_to_le64(x) OSSwapHostToLittleInt64(x)
175 #define __cpu_to_le32(x) OSSwapHostToLittleInt32(x)
176 #define __cpu_to_le16(x) OSSwapHostToLittleInt16(x)
178 #define __le16_to_cpu(x) OSSwapLittleToHostInt16(x)
179 #define __le32_to_cpu(x) OSSwapLittleToHostInt32(x)
180 #define __le64_to_cpu(x) OSSwapLittleToHostInt64(x)
182 #define cpu_to_le64(x) __cpu_to_le64(x)
183 #define cpu_to_le32(x) __cpu_to_le32(x)
184 #define cpu_to_le16(x) __cpu_to_le16(x)
186 #define le64_to_cpu(x) __le64_to_cpu(x)
187 #define le32_to_cpu(x) __le32_to_cpu(x)
188 #define le16_to_cpu(x) __le16_to_cpu(x)
190 #define __swab16(x) OSSwapInt16(x)
191 #define __swab32(x) OSSwapInt32(x)
192 #define __swab64(x) OSSwapInt64(x)
193 #define __swab16s(x) do { *(x) = __swab16(*(x)); } while (0)
194 #define __swab32s(x) do { *(x) = __swab32(*(x)); } while (0)
195 #define __swab64s(x) do { *(x) = __swab64(*(x)); } while (0)
199 # ifndef THREAD_SIZE /* x86_64 linux has THREAD_SIZE in userspace */
200 # define THREAD_SIZE 8192
203 #define LUSTRE_TRACE_SIZE (THREAD_SIZE >> 5)
205 #define CHECK_STACK() do { } while(0)
206 #define CDEBUG_STACK() (0L)
209 #define LUSTRE_LNET_PID 12345
211 #define ENTRY_NESTING_SUPPORT (1)
212 #define ENTRY_NESTING do {;} while (0)
213 #define EXIT_NESTING do {;} while (0)
214 #define __current_nesting_level() (0)
217 * Platform specific declarations for cfs_curproc API (libcfs/curproc.h)
219 * Implementation is in linux-curproc.c
221 #define CFS_CURPROC_COMM_MAX (sizeof ((struct task_struct *)0)->comm)
223 typedef __u32 cfs_kernel_cap_t;
226 * Module support (probably shouldn't be used in generic code?)
233 static inline void MODULE_AUTHOR(char *name)
235 printf("%s\n", name);
237 #define MODULE_DESCRIPTION(name) MODULE_AUTHOR(name)
238 #define MODULE_LICENSE(name) MODULE_AUTHOR(name)
240 #define THIS_MODULE (void *)0x11111
244 static inline int request_module(char *name)
249 static inline void __module_get(struct module *module)
253 static inline int try_module_get(struct module *module)
258 static inline void module_put(struct module *module)
263 static inline int module_refcount(struct module *m)
268 /***************************************************************************
270 * Linux kernel slab shrinker emulation. Currently used only in lu_object.c
272 ***************************************************************************/
278 #define DEFAULT_SEEKS (0)
280 typedef int (*shrinker_t)(int, unsigned int);
282 static inline struct shrinker *set_shrinker(int seeks, shrinker_t shrinkert)
284 return (struct shrinker *)0xdeadbea1; // Cannot return NULL here
287 static inline void remove_shrinker(struct shrinker *shrinker)
291 /***************************************************************************
293 * Linux kernel radix tree emulation.
295 * XXX this stub-implementation assumes that elements stored in a radix tree
296 * are struct page's and nothing else. Proper implementation will be
299 ***************************************************************************/
301 struct radix_tree_root {
302 struct list_head list;
306 struct radix_tree_node {
307 struct list_head _node;
312 #define RADIX_TREE_INIT(mask) { \
316 #define RADIX_TREE(name, mask) \
317 struct radix_tree_root name = RADIX_TREE_INIT(mask)
320 #define INIT_RADIX_TREE(root, mask) \
322 CFS_INIT_LIST_HEAD(&((struct radix_tree_root *)root)->list); \
323 ((struct radix_tree_root *)root)->rnode = NULL; \
326 static inline int radix_tree_insert(struct radix_tree_root *root,
327 unsigned long idx, void *item)
329 struct radix_tree_node *node;
330 node = malloc(sizeof(*node));
334 CFS_INIT_LIST_HEAD(&node->_node);
337 list_add_tail(&node->_node, &root->list);
338 root->rnode = (void *)1001;
342 static inline struct radix_tree_node *radix_tree_lookup0(struct radix_tree_root *root,
345 struct radix_tree_node *node;
347 if (list_empty(&root->list))
350 cfs_list_for_each_entry_typed(node, &root->list,
351 struct radix_tree_node, _node)
352 if (node->index == idx)
358 static inline void *radix_tree_lookup(struct radix_tree_root *root,
361 struct radix_tree_node *node = radix_tree_lookup0(root, idx);
368 static inline void *radix_tree_delete(struct radix_tree_root *root,
371 struct radix_tree_node *p = radix_tree_lookup0(root, idx);
377 list_del_init(&p->_node);
380 if (list_empty(&root->list))
386 static inline unsigned int
387 radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
388 unsigned long first_index, unsigned int max_items)
393 for (i = 0; i < max_items; i++, first_index++) {
394 results[j++] = radix_tree_lookup(root, first_index);
395 if (results[j - 1] == NULL)
402 static inline int radix_tree_preload(int gfp_mask)
407 void radix_tree_init(void);
409 static inline void radix_tree_preload_end(void)
413 typedef ssize_t (*read_actor_t)();
415 #define CFS_IFSHIFT 12
417 #define CFS_IFTODT(type) (((type) & S_IFMT) >> CFS_IFSHIFT)
418 #define CFS_DTTOIF(dirtype) ((dirtype) << CFS_IFSHIFT)