4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
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>
79 #ifdef HAVE_LIBPTHREAD
83 #if defined(HAVE_SYS_TYPES_H)
84 #include <sys/types.h>
87 #ifdef HAVE_SYS_USER_H
88 # include <sys/user.h>
99 #include <libcfs/list.h>
100 #include <libcfs/posix/posix-types.h>
101 #include <libcfs/user-time.h>
102 #include <libcfs/user-prim.h>
103 #include <libcfs/user-mem.h>
104 #include <libcfs/user-lock.h>
105 #include <libcfs/user-tcpip.h>
106 #include <libcfs/posix/posix-wordsize.h>
107 #include <libcfs/user-bitops.h>
109 # define cfs_gettimeofday(tv) gettimeofday(tv, NULL);
110 typedef unsigned long long cfs_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;
129 #define cfs_get_fd(x) NULL
130 #define cfs_put_file(f) do {} while (0)
133 /* Userpace byte flipping */
135 # include <byteswap.h>
136 # define __swab16(x) bswap_16(x)
137 # define __swab32(x) bswap_32(x)
138 # define __swab64(x) bswap_64(x)
139 # define __swab16s(x) do {*(x) = bswap_16(*(x));} while (0)
140 # define __swab32s(x) do {*(x) = bswap_32(*(x));} while (0)
141 # define __swab64s(x) do {*(x) = bswap_64(*(x));} while (0)
142 # if __BYTE_ORDER == __LITTLE_ENDIAN
143 # define le16_to_cpu(x) (x)
144 # define cpu_to_le16(x) (x)
145 # define le32_to_cpu(x) (x)
146 # define cpu_to_le32(x) (x)
147 # define le64_to_cpu(x) (x)
148 # define cpu_to_le64(x) (x)
150 # define be16_to_cpu(x) bswap_16(x)
151 # define cpu_to_be16(x) bswap_16(x)
152 # define be32_to_cpu(x) bswap_32(x)
153 # define cpu_to_be32(x) bswap_32(x)
154 # define be64_to_cpu(x) (__u64)bswap_64(x)
155 # define cpu_to_be64(x) (__u64)bswap_64(x)
157 # if __BYTE_ORDER == __BIG_ENDIAN
158 # define le16_to_cpu(x) bswap_16(x)
159 # define cpu_to_le16(x) bswap_16(x)
160 # define le32_to_cpu(x) bswap_32(x)
161 # define cpu_to_le32(x) bswap_32(x)
162 # define le64_to_cpu(x) (__u64)bswap_64(x)
163 # define cpu_to_le64(x) (__u64)bswap_64(x)
165 # define be16_to_cpu(x) (x)
166 # define cpu_to_be16(x) (x)
167 # define be32_to_cpu(x) (x)
168 # define cpu_to_be32(x) (x)
169 # define be64_to_cpu(x) (x)
170 # define cpu_to_be64(x) (x)
173 # error "Unknown byte order"
174 # endif /* __BIG_ENDIAN */
175 # endif /* __LITTLE_ENDIAN */
177 #define __cpu_to_le64(x) OSSwapHostToLittleInt64(x)
178 #define __cpu_to_le32(x) OSSwapHostToLittleInt32(x)
179 #define __cpu_to_le16(x) OSSwapHostToLittleInt16(x)
181 #define __le16_to_cpu(x) OSSwapLittleToHostInt16(x)
182 #define __le32_to_cpu(x) OSSwapLittleToHostInt32(x)
183 #define __le64_to_cpu(x) OSSwapLittleToHostInt64(x)
185 #define cpu_to_le64(x) __cpu_to_le64(x)
186 #define cpu_to_le32(x) __cpu_to_le32(x)
187 #define cpu_to_le16(x) __cpu_to_le16(x)
189 #define le64_to_cpu(x) __le64_to_cpu(x)
190 #define le32_to_cpu(x) __le32_to_cpu(x)
191 #define le16_to_cpu(x) __le16_to_cpu(x)
193 #define __swab16(x) OSSwapInt16(x)
194 #define __swab32(x) OSSwapInt32(x)
195 #define __swab64(x) OSSwapInt64(x)
196 #define __swab16s(x) do { *(x) = __swab16(*(x)); } while (0)
197 #define __swab32s(x) do { *(x) = __swab32(*(x)); } while (0)
198 #define __swab64s(x) do { *(x) = __swab64(*(x)); } while (0)
202 # ifndef THREAD_SIZE /* x86_64 linux has THREAD_SIZE in userspace */
203 # define CFS_THREAD_SIZE 8192
205 # define CFS_THREAD_SIZE THREAD_SIZE
208 #define LUSTRE_TRACE_SIZE (CFS_THREAD_SIZE >> 5)
210 #define CFS_CHECK_STACK(msgdata, mask, cdls) do {} while(0)
211 #define CDEBUG_STACK() (0L)
214 #define LUSTRE_LNET_PID 12345
216 #define ENTRY_NESTING_SUPPORT (1)
217 #define ENTRY_NESTING do {;} while (0)
218 #define EXIT_NESTING do {;} while (0)
219 #define __current_nesting_level() (0)
222 * Platform specific declarations for cfs_curproc API (libcfs/curproc.h)
224 * Implementation is in linux-curproc.c
226 #define CFS_CURPROC_COMM_MAX (sizeof ((struct task_struct *)0)->comm)
228 typedef __u32 cfs_kernel_cap_t;
231 * Module support (probably shouldn't be used in generic code?)
233 typedef struct cfs_module {
238 static inline void MODULE_AUTHOR(char *name)
240 printf("%s\n", name);
242 #define MODULE_DESCRIPTION(name) MODULE_AUTHOR(name)
243 #define MODULE_LICENSE(name) MODULE_AUTHOR(name)
245 #define THIS_MODULE (void *)0x11111
249 #define EXPORT_SYMBOL(symbol)
251 static inline int cfs_request_module(const char *name, ...)
256 static inline void __cfs_module_get(cfs_module_t *module)
260 static inline int cfs_try_module_get(cfs_module_t *module)
265 static inline void cfs_module_put(cfs_module_t *module)
270 static inline int cfs_module_refcount(cfs_module_t *m)
275 /***************************************************************************
277 * Linux kernel slab shrinker emulation. Currently used only in lu_object.c
279 ***************************************************************************/
281 struct cfs_shrinker {
285 #define CFS_DEFAULT_SEEKS (0)
287 typedef int (*cfs_shrinker_t)(int, unsigned int);
290 struct cfs_shrinker *cfs_set_shrinker(int seeks, cfs_shrinker_t shrink)
292 return (struct cfs_shrinker *)0xdeadbea1; // Cannot return NULL here
295 static inline void cfs_remove_shrinker(struct cfs_shrinker *shrinker)
299 /***************************************************************************
301 * Linux kernel radix tree emulation.
303 * XXX this stub-implementation assumes that elements stored in a radix tree
304 * are struct page's and nothing else. Proper implementation will be
307 ***************************************************************************/
309 struct radix_tree_root {
314 struct radix_tree_node {
320 #define RADIX_TREE_INIT(mask) { \
324 #define RADIX_TREE(name, mask) \
325 struct radix_tree_root name = RADIX_TREE_INIT(mask)
328 #define INIT_RADIX_TREE(root, mask) \
330 CFS_INIT_LIST_HEAD(&((struct radix_tree_root *)root)->list); \
331 ((struct radix_tree_root *)root)->rnode = NULL; \
334 static inline int radix_tree_insert(struct radix_tree_root *root,
335 unsigned long idx, void *item)
337 struct radix_tree_node *node;
338 node = malloc(sizeof(*node));
342 CFS_INIT_LIST_HEAD(&node->_node);
345 cfs_list_add_tail(&node->_node, &root->list);
346 root->rnode = (void *)1001;
350 static inline struct radix_tree_node *radix_tree_lookup0(struct radix_tree_root *root,
353 struct radix_tree_node *node;
355 if (cfs_list_empty(&root->list))
358 cfs_list_for_each_entry_typed(node, &root->list,
359 struct radix_tree_node, _node)
360 if (node->index == idx)
366 static inline void *radix_tree_lookup(struct radix_tree_root *root,
369 struct radix_tree_node *node = radix_tree_lookup0(root, idx);
376 static inline void *radix_tree_delete(struct radix_tree_root *root,
379 struct radix_tree_node *p = radix_tree_lookup0(root, idx);
385 cfs_list_del_init(&p->_node);
388 if (cfs_list_empty(&root->list))
394 static inline unsigned int
395 radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
396 unsigned long first_index, unsigned int max_items)
401 for (i = 0; i < max_items; i++, first_index++) {
402 results[j++] = radix_tree_lookup(root, first_index);
403 if (results[j - 1] == NULL)
410 static inline int radix_tree_preload(int gfp_mask)
415 void radix_tree_init(void);
417 static inline void radix_tree_preload_end(void)
421 /***************************************************************************
423 * Linux kernel red black tree emulation.
425 ***************************************************************************/
427 unsigned long rb_parent_color;
430 struct rb_node *rb_right;
431 struct rb_node *rb_left;
435 struct rb_node *rb_node;
439 #define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3))
440 #define rb_color(r) ((r)->rb_parent_color & 1)
441 #define rb_is_red(r) (!rb_color(r))
442 #define rb_is_black(r) rb_color(r)
443 #define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0)
444 #define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0)
446 static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
448 rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
450 static inline void rb_set_color(struct rb_node *rb, int color)
452 rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
455 #define RB_ROOT ((struct rb_root) { NULL, })
456 #define rb_entry(ptr, type, member) container_of(ptr, type, member)
458 #define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
459 #define RB_EMPTY_NODE(node) (rb_parent(node) == node)
460 #define RB_CLEAR_NODE(node) (rb_set_parent(node, node))
462 static inline void rb_init_node(struct rb_node *rb)
464 rb->rb_parent_color = 0;
470 extern void rb_insert_color(struct rb_node *, struct rb_root *);
471 extern void rb_erase(struct rb_node *, struct rb_root *);
473 /* Find logical next and previous nodes in a tree */
474 extern struct rb_node *rb_next(const struct rb_node *);
475 extern struct rb_node *rb_prev(const struct rb_node *);
476 extern struct rb_node *rb_first(const struct rb_root *);
477 extern struct rb_node *rb_last(const struct rb_root *);
478 static inline void rb_link_node(struct rb_node *node, struct rb_node *parent,
479 struct rb_node **rb_link)
481 node->rb_parent_color = (unsigned long)parent;
482 node->rb_left = node->rb_right = NULL;
487 /***************************************************************************
489 * End of Linux kernel red black tree emulation.
491 ***************************************************************************/
493 typedef ssize_t (*read_actor_t)();
495 #define CFS_IFSHIFT 12
497 #define CFS_IFTODT(type) (((type) & S_IFMT) >> CFS_IFSHIFT)
498 #define CFS_DTTOIF(dirtype) ((dirtype) << CFS_IFSHIFT)