1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) && LINUX_VERSION_CODE < KERNEL_VERSION(2,5,69)
29 #error sorry, lustre requires at least 2.5.69
32 #include <linux/portals_compat25.h>
35 * groups_info related staff
37 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
39 #define NGROUPS_SMALL NGROUPS
40 #define NGROUPS_PER_BLOCK ((int)(EXEC_PAGESIZE / sizeof(gid_t)))
44 gid_t small_block[NGROUPS_SMALL];
48 #define current_ngroups current->ngroups
50 struct group_info *groups_alloc(int gidsetsize);
51 void groups_free(struct group_info *ginfo);
52 int groups_search(struct group_info *ginfo, gid_t grp);
54 #define get_group_info(group_info) \
56 atomic_inc(&(group_info)->usage); \
59 #define put_group_info(group_info) \
61 if (atomic_dec_and_test(&(group_info)->usage)) \
62 groups_free(group_info); \
65 #define groups_sort(gi) do {} while (0)
67 #define GROUP_AT(gi, i) ((gi)->small_block[(i)])
69 static inline int cleanup_group_info(void)
71 /* Get rid of unneeded supplementary groups */
73 memset(current->groups, 0, sizeof(current->groups));
79 #define current_ngroups current->group_info->ngroups
81 void groups_sort(struct group_info *ginfo);
82 int groups_search(struct group_info *ginfo, gid_t grp);
84 static inline int cleanup_group_info(void)
86 struct group_info *ginfo;
88 ginfo = groups_alloc(0);
92 set_current_groups(ginfo);
93 put_group_info(ginfo);
97 #endif /* end of groups_info stuff */
100 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
103 * OBD need working random driver, thus all our
104 * initialization routines must be called after device
105 * driver initialization
109 #define module_init(a) late_initcall(a)
112 /* XXX our code should be using the 2.6 calls, not the other way around */
113 #define TryLockPage(page) TestSetPageLocked(page)
114 #define filemap_fdatasync(mapping) filemap_fdatawrite(mapping)
115 #define Page_Uptodate(page) PageUptodate(page)
117 #define KDEVT_INIT(val) (val)
119 #define LTIME_S(time) (time.tv_sec)
120 #define ll_path_lookup path_lookup
121 #define ll_permission(inode,mask,nd) permission(inode,mask,nd)
123 #define ll_pgcache_lock(mapping) spin_lock(&mapping->page_lock)
124 #define ll_pgcache_unlock(mapping) spin_unlock(&mapping->page_lock)
125 #define ll_call_writepage(inode, page) \
126 (inode)->i_mapping->a_ops->writepage(page, NULL)
127 #define ll_invalidate_inode_pages(inode) \
128 invalidate_inode_pages((inode)->i_mapping)
129 #define ll_truncate_complete_page(page) \
130 truncate_complete_page(page->mapping, page)
132 #define ll_vfs_create(a,b,c,d) vfs_create(a,b,c,d)
134 #define ll_dev_t dev_t
136 #define to_kdev_t(dev) (dev)
137 #define kdev_t_to_nr(dev) (dev)
138 #define val_to_kdev(dev) (dev)
139 #define ILOOKUP(sb, ino, test, data) ilookup5(sb, ino, test, data);
141 #include <linux/writeback.h>
143 static inline void lustre_daemonize_helper(void)
145 LASSERT(current->signal != NULL);
146 current->signal->session = 1;
147 if (current->group_leader)
148 current->group_leader->signal->pgrp = 1;
150 CERROR("we aren't group leader\n");
151 current->signal->tty = NULL;
154 #define __set_page_ll_data(page, llap) \
156 page_cache_get(page); \
157 SetPagePrivate(page); \
158 page->private = (unsigned long)llap; \
160 #define __clear_page_ll_data(page) \
162 ClearPagePrivate(page); \
163 page_cache_release(page); \
167 #define smp_num_cpus NR_CPUS
171 #include <linux/proc_fs.h>
175 #define ll_vfs_create(a,b,c,d) vfs_create(a,b,c)
176 #define ll_permission(inode,mask,nd) permission(inode,mask)
177 #define ILOOKUP(sb, ino, test, data) ilookup4(sb, ino, test, data);
178 #define DCACHE_DISCONNECTED DCACHE_NFSD_DISCONNECTED
181 static inline void clear_page_dirty(struct page *page)
184 ClearPageDirty(page);
187 /* 2.5 uses hlists for some things, like the d_hash. we'll treat them
188 * as 2.5 and let macros drop back.. */
189 #ifndef HLIST_HEAD /* until we get a kernel newer than l28 */
190 #define hlist_entry list_entry
191 #define hlist_head list_head
192 #define hlist_node list_head
193 #define HLIST_HEAD LIST_HEAD
194 #define INIT_HLIST_HEAD INIT_LIST_HEAD
195 #define hlist_del_init list_del_init
196 #define hlist_add_head list_add
197 #define hlist_for_each_safe list_for_each_safe
199 #define KDEVT_INIT(val) (val)
200 #define ext3_xattr_set_handle ext3_xattr_set
201 #define extN_xattr_set_handle extN_xattr_set
202 #define try_module_get __MOD_INC_USE_COUNT
203 #define module_put __MOD_DEC_USE_COUNT
204 #define LTIME_S(time) (time)
205 #if !defined(CONFIG_RH_2_4_20) && !defined(cpu_online)
206 #define cpu_online(cpu) (cpu_online_map & (1<<cpu))
209 static inline int ll_path_lookup(const char *path, unsigned flags,
210 struct nameidata *nd)
213 if (path_init(path, flags, nd))
214 error = path_walk(path, nd);
217 #define ll_permission(inode,mask,nd) permission(inode,mask)
218 typedef long sector_t;
220 #define ll_pgcache_lock(mapping) spin_lock(&pagecache_lock)
221 #define ll_pgcache_unlock(mapping) spin_unlock(&pagecache_lock)
222 #define ll_call_writepage(inode, page) \
223 (inode)->i_mapping->a_ops->writepage(page)
224 #define ll_invalidate_inode_pages(inode) invalidate_inode_pages(inode)
225 #define ll_truncate_complete_page(page) truncate_complete_page(page)
227 static inline void __d_drop(struct dentry *dentry)
229 list_del(&dentry->d_hash);
230 INIT_LIST_HEAD(&dentry->d_hash);
233 static inline void lustre_daemonize_helper(void)
235 current->session = 1;
240 #ifndef HAVE_COND_RESCHED
241 static inline void cond_resched(void)
243 if (unlikely(need_resched())) {
244 set_current_state(TASK_RUNNING);
250 static inline int mapping_mapped(struct address_space *mapping)
252 return mapping->i_mmap_shared ? 1 : 0;
255 /* to find proc_dir_entry from inode. 2.6 has native one -bzzz */
257 #define PDE(ii) ((ii)->u.generic_ip)
260 #define __set_page_ll_data(page, llap) page->private = (unsigned long)llap
261 #define __clear_page_ll_data(page) page->private = 0
262 #define PageWriteback(page) 0
263 #define end_page_writeback(page)
265 #ifdef ZAP_PAGE_RANGE_VMA
266 #define ll_zap_page_range(vma, addr, len) zap_page_range(vma, addr, len)
268 #define ll_zap_page_range(vma, addr, len) zap_page_range(vma->vm_mm, addr, len)
271 #endif /* end of 2.4 compat macros */
273 #ifdef HAVE_PAGE_LIST
274 static inline int mapping_has_pages(struct address_space *mapping)
278 ll_pgcache_lock(mapping);
279 if (list_empty(&mapping->dirty_pages) &&
280 list_empty(&mapping->clean_pages) &&
281 list_empty(&mapping->locked_pages)) {
284 ll_pgcache_unlock(mapping);
289 static inline int clear_page_dirty_for_io(struct page *page)
291 struct address_space *mapping = page->mapping;
293 if (page->mapping && PageDirty(page)) {
294 ClearPageDirty(page);
295 ll_pgcache_lock(mapping);
296 list_del(&page->list);
297 list_add(&page->list, &mapping->locked_pages);
298 ll_pgcache_unlock(mapping);
304 static inline int mapping_has_pages(struct address_space *mapping)
306 return mapping->nrpages > 0;
310 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
311 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
312 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
314 #define ll_set_dflags(dentry, flags) do { \
315 spin_lock(&dentry->d_lock); \
316 dentry->d_flags |= flags; \
317 spin_unlock(&dentry->d_lock); \
319 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path, mode)
322 #ifdef HAVE_I_ALLOC_SEM
323 #define UP_WRITE_I_ALLOC_SEM(i) do { up_write(&(i)->i_alloc_sem); } while (0)
324 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
325 #define LASSERT_MDS_ORPHAN_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
327 #define UP_READ_I_ALLOC_SEM(i) do { up_read(&(i)->i_alloc_sem); } while (0)
328 #define DOWN_READ_I_ALLOC_SEM(i) do { down_read(&(i)->i_alloc_sem); } while (0)
329 #define LASSERT_MDS_ORPHAN_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
330 #define MDS_PACK_MD_LOCK 1
332 #define UP_READ_I_ALLOC_SEM(i) do { up(&(i)->i_sem); } while (0)
333 #define DOWN_READ_I_ALLOC_SEM(i) do { down(&(i)->i_sem); } while (0)
334 #define LASSERT_MDS_ORPHAN_READ_LOCKED(i) LASSERT(down_trylock(&(i)->i_sem) != 0)
336 #define UP_WRITE_I_ALLOC_SEM(i) do { up(&(i)->i_sem); } while (0)
337 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down(&(i)->i_sem); } while (0)
338 #define LASSERT_MDS_ORPHAN_WRITE_LOCKED(i) LASSERT(down_trylock(&(i)->i_sem) != 0)
339 #define MDS_PACK_MD_LOCK 0
342 #endif /* __KERNEL__ */
343 #endif /* _COMPAT25_H */