lustre/include/linux/lustre_compat25.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   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.
  11  *
  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.
  16  *
  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.
  20  *
  21  */
  22
  23 #ifndef _LINUX_COMPAT25_H
  24 #define _LINUX_COMPAT25_H
  25
  26 #ifdef __KERNEL__
  27
  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
  30 #endif
  31
  32 #include <libcfs/linux/portals_compat25.h>
  33
  34 #include <linux/lustre_patchless_compat.h>
  35
  36 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  37 struct ll_iattr {
  38         struct iattr    iattr;
  39         unsigned int    ia_attr_flags;
  40 };
  41 #else
  42 #define ll_iattr iattr
  43 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  44
  45 #ifndef HAVE_SET_FS_PWD
  46 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  47                 struct dentry *dentry)
  48 {
  49         struct dentry *old_pwd;
  50         struct vfsmount *old_pwdmnt;
  51
  52         write_lock(&fs->lock);
  53         old_pwd = fs->pwd;
  54         old_pwdmnt = fs->pwdmnt;
  55         fs->pwdmnt = mntget(mnt);
  56         fs->pwd = dget(dentry);
  57         write_unlock(&fs->lock);
  58
  59         if (old_pwd) {
  60                 dput(old_pwd);
  61                 mntput(old_pwdmnt);
  62         }
  63 }
  64 #else
  65 #define ll_set_fs_pwd set_fs_pwd
  66 #endif /* HAVE_SET_FS_PWD */
  67
  68 #define ATTR_BLOCKS     0x4000
  69
  70 #if HAVE_INODE_I_MUTEX
  71 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
  72 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
  73 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
  74 #else
  75 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
  76 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
  77 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
  78 #endif /* HAVE_INODE_I_MUTEX */
  79
  80 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
  81 #define d_child d_u.d_child
  82 #define d_rcu d_u.d_rcu
  83 #endif
  84
  85 #ifdef HAVE_DQUOTOFF_MUTEX
  86 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
  87 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
  88 #else
  89 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
  90 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
  91 #endif /* HAVE_DQUOTOFF_MUTEX */
  92
  93
  94 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
  95 #define NGROUPS_SMALL           NGROUPS
  96 #define NGROUPS_PER_BLOCK       ((int)(EXEC_PAGESIZE / sizeof(gid_t)))
  97
  98 struct group_info {
  99         int        ngroups;
 100         atomic_t   usage;
 101         gid_t      small_block[NGROUPS_SMALL];
 102         int        nblocks;
 103         gid_t     *blocks[0];
 104 };
 105 #define current_ngroups current->ngroups
 106 #define current_groups current->groups
 107
 108 struct group_info *groups_alloc(int gidsetsize);
 109 void groups_free(struct group_info *ginfo);
 110 #else /* >= 2.6.4 */
 111
 112 #define current_ngroups current->group_info->ngroups
 113 #define current_groups current->group_info->small_block
 114
 115 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4) */
 116
 117 #ifndef page_private
 118 #define page_private(page) ((page)->private)
 119 #define set_page_private(page, v) ((page)->private = (v))
 120 #endif
 121
 122 #ifndef HAVE_GFP_T
 123 #define gfp_t int
 124 #endif
 125
 126 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 127
 128 #define lock_dentry(___dentry)          spin_lock(&(___dentry)->d_lock)
 129 #define unlock_dentry(___dentry)        spin_unlock(&(___dentry)->d_lock)
 130
 131 #define lock_24kernel()         do {} while (0)
 132 #define unlock_24kernel()       do {} while (0)
 133 #define ll_kernel_locked()      kernel_locked()
 134
 135 /*
 136  * OBD need working random driver, thus all our
 137  * initialization routines must be called after device
 138  * driver initialization
 139  */
 140 #ifndef MODULE
 141 #undef module_init
 142 #define module_init(a)     late_initcall(a)
 143 #endif
 144
 145 /* XXX our code should be using the 2.6 calls, not the other way around */
 146 #define TryLockPage(page)               TestSetPageLocked(page)
 147 #define Page_Uptodate(page)             PageUptodate(page)
 148 #define ll_redirty_page(page)           set_page_dirty(page)
 149
 150 #define KDEVT_INIT(val)                 (val)
 151
 152 #define LTIME_S(time)                   (time.tv_sec)
 153 #define ll_path_lookup                  path_lookup
 154 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 155
 156 #define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
 157 #define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)
 158 #define ll_call_writepage(inode, page)  \
 159                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 160 #define ll_invalidate_inode_pages(inode) \
 161                                 invalidate_inode_pages((inode)->i_mapping)
 162 #define ll_truncate_complete_page(page) \
 163                                 truncate_complete_page(page->mapping, page)
 164
 165 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 166 #define ll_dev_t                        dev_t
 167 #define kdev_t                          dev_t
 168 #define to_kdev_t(dev)                  (dev)
 169 #define kdev_t_to_nr(dev)               (dev)
 170 #define val_to_kdev(dev)                (dev)
 171 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, data);
 172
 173 #include <linux/writeback.h>
 174
 175 static inline int cleanup_group_info(void)
 176 {
 177         struct group_info *ginfo;
 178
 179         ginfo = groups_alloc(0);
 180         if (!ginfo)
 181                 return -ENOMEM;
 182
 183         set_current_groups(ginfo);
 184         put_group_info(ginfo);
 185
 186         return 0;
 187 }
 188
 189 #define __set_page_ll_data(page, llap) \
 190         do {       \
 191                 page_cache_get(page); \
 192                 SetPagePrivate(page); \
 193                 set_page_private(page, (unsigned long)llap); \
 194         } while (0)
 195 #define __clear_page_ll_data(page) \
 196         do {       \
 197                 ClearPagePrivate(page); \
 198                 set_page_private(page, 0); \
 199                 page_cache_release(page); \
 200         } while(0)
 201
 202 #define kiobuf bio
 203
 204 #include <linux/proc_fs.h>
 205
 206 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11)
 207 #define __d_rehash(dentry, lock) d_rehash_cond(dentry, lock)
 208 #endif
 209
 210 #ifdef HAVE_CAN_SLEEP_ARG
 211 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 212         flock_lock_file_wait(file, lock, can_sleep)
 213 #else
 214 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 215         flock_lock_file_wait(file, lock)
 216 #endif
 217
 218 #define CheckWriteback(page, cmd) \
 219         (!(!PageWriteback(page) && cmd == OBD_BRW_WRITE))
 220
 221 #endif
 222
 223 #ifdef HAVE_PAGE_LIST
 224 static inline int mapping_has_pages(struct address_space *mapping)
 225 {
 226         int rc = 1;
 227
 228         ll_pgcache_lock(mapping);
 229         if (list_empty(&mapping->dirty_pages) &&
 230             list_empty(&mapping->clean_pages) &&
 231             list_empty(&mapping->locked_pages)) {
 232                 rc = 0;
 233         }
 234         ll_pgcache_unlock(mapping);
 235
 236         return rc;
 237 }
 238 #else
 239 static inline int mapping_has_pages(struct address_space *mapping)
 240 {
 241         return mapping->nrpages > 0;
 242 }
 243 #endif
 244
 245 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 246 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 247 #else
 248 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 249 #endif
 250
 251 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 252 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 253 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
 254 #else
 255 #define ll_set_dflags(dentry, flags) do { \
 256                 spin_lock(&dentry->d_lock); \
 257                 dentry->d_flags |= flags; \
 258                 spin_unlock(&dentry->d_lock); \
 259         } while(0)
 260 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path, mode)
 261 #endif
 262
 263 #ifndef container_of
 264 #define container_of(ptr, type, member) ({                      \
 265                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 266                 (type *)( (char *)__mptr - offsetof(type,member) );})
 267 #endif
 268
 269 #ifdef HAVE_I_ALLOC_SEM
 270 #define UP_WRITE_I_ALLOC_SEM(i)   do { up_write(&(i)->i_alloc_sem); } while (0)
 271 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
 272 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 273
 274 #define UP_READ_I_ALLOC_SEM(i)    do { up_read(&(i)->i_alloc_sem); } while (0)
 275 #define DOWN_READ_I_ALLOC_SEM(i)  do { down_read(&(i)->i_alloc_sem); } while (0)
 276 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 277 #else
 278 #define UP_READ_I_ALLOC_SEM(i)              do { } while (0)
 279 #define DOWN_READ_I_ALLOC_SEM(i)            do { } while (0)
 280 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i)  do { } while (0)
 281
 282 #define UP_WRITE_I_ALLOC_SEM(i)             do { } while (0)
 283 #define DOWN_WRITE_I_ALLOC_SEM(i)           do { } while (0)
 284 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) do { } while (0)
 285 #endif
 286
 287 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 288 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 289 #endif
 290
 291 #ifndef HAVE_FILEMAP_FDATAWRITE
 292 #define filemap_fdatawrite(mapping)      filemap_fdatasync(mapping)
 293 #endif
 294
 295 #ifdef HAVE_VFS_KERN_MOUNT
 296 static inline
 297 struct vfsmount *
 298 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 299 {
 300         struct file_system_type *type = get_fs_type(fstype);
 301         struct vfsmount *mnt;
 302         if (!type)
 303                 return ERR_PTR(-ENODEV);
 304         mnt = vfs_kern_mount(type, flags, name, data);
 305         module_put(type->owner);
 306         return mnt;
 307 }
 308 #else
 309 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 310 #endif
 311
 312 #ifndef HAVE_GENERIC_FILE_READ
 313 static inline
 314 ssize_t
 315 generic_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
 316 {
 317         struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
 318         struct kiocb kiocb;
 319         ssize_t ret;
 320
 321         init_sync_kiocb(&kiocb, filp);
 322         kiocb.ki_pos = *ppos;
 323         kiocb.ki_left = len;
 324
 325         ret = generic_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
 326         *ppos = kiocb.ki_pos;
 327         return ret;
 328 }
 329 #endif
 330
 331 #ifndef HAVE_GENERIC_FILE_WRITE
 332 static inline
 333 ssize_t
 334 generic_file_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
 335 {
 336         struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
 337         struct kiocb kiocb;
 338         ssize_t ret;
 339
 340         init_sync_kiocb(&kiocb, filp);
 341         kiocb.ki_pos = *ppos;
 342         kiocb.ki_left = len;
 343
 344         ret = generic_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
 345         *ppos = kiocb.ki_pos;
 346
 347         return ret;
 348 }
 349 #endif
 350
 351 #ifdef HAVE_STATFS_DENTRY_PARAM
 352 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 353 #else
 354 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 355 #endif
 356
 357 /* task_struct */
 358 #ifndef HAVE_TASK_PPTR
 359 #define p_pptr parent
 360 #endif
 361
 362 #endif /* __KERNEL__ */
 363 #endif /* _COMPAT25_H */