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(2,6,5)
  29 #error Sorry, Lustre requires at Linux kernel version 2.6.5 or later
  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 /*
  69  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
  70  * ATTR_* attributes (see bug 13828)
  71  */
  72 #define ATTR_BLOCKS    (1 << 27)
  73
  74 #if HAVE_INODE_I_MUTEX
  75 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
  76 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
  77 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
  78 #else
  79 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
  80 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
  81 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
  82 #endif /* HAVE_INODE_I_MUTEX */
  83
  84 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
  85 #define d_child d_u.d_child
  86 #define d_rcu d_u.d_rcu
  87 #endif
  88
  89 #ifdef HAVE_DQUOTOFF_MUTEX
  90 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
  91 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
  92 #else
  93 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
  94 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
  95 #endif /* HAVE_DQUOTOFF_MUTEX */
  96
  97 #define current_ngroups current->group_info->ngroups
  98 #define current_groups current->group_info->small_block
  99
 100 #ifndef page_private
 101 #define page_private(page) ((page)->private)
 102 #define set_page_private(page, v) ((page)->private = (v))
 103 #endif
 104
 105 #ifndef HAVE_GFP_T
 106 #define gfp_t int
 107 #endif
 108
 109 #define lock_dentry(___dentry)          spin_lock(&(___dentry)->d_lock)
 110 #define unlock_dentry(___dentry)        spin_unlock(&(___dentry)->d_lock)
 111
 112 #define ll_kernel_locked()      kernel_locked()
 113
 114 /*
 115  * OBD need working random driver, thus all our
 116  * initialization routines must be called after device
 117  * driver initialization
 118  */
 119 #ifndef MODULE
 120 #undef module_init
 121 #define module_init(a)     late_initcall(a)
 122 #endif
 123
 124 /* XXX our code should be using the 2.6 calls, not the other way around */
 125 #define TryLockPage(page)               TestSetPageLocked(page)
 126 #define Page_Uptodate(page)             PageUptodate(page)
 127 #define ll_redirty_page(page)           set_page_dirty(page)
 128
 129 #define KDEVT_INIT(val)                 (val)
 130
 131 #define LTIME_S(time)                   (time.tv_sec)
 132 #define ll_path_lookup                  path_lookup
 133 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 134
 135 #define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
 136 #define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)
 137 #define ll_call_writepage(inode, page)  \
 138                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 139 #define ll_invalidate_inode_pages(inode) \
 140                                 invalidate_inode_pages((inode)->i_mapping)
 141 #define ll_truncate_complete_page(page) \
 142                                 truncate_complete_page(page->mapping, page)
 143
 144 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 145 #define ll_dev_t                        dev_t
 146 #define kdev_t                          dev_t
 147 #define to_kdev_t(dev)                  (dev)
 148 #define kdev_t_to_nr(dev)               (dev)
 149 #define val_to_kdev(dev)                (dev)
 150 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, data);
 151
 152 #include <linux/writeback.h>
 153
 154 static inline int cleanup_group_info(void)
 155 {
 156         struct group_info *ginfo;
 157
 158         ginfo = groups_alloc(0);
 159         if (!ginfo)
 160                 return -ENOMEM;
 161
 162         set_current_groups(ginfo);
 163         put_group_info(ginfo);
 164
 165         return 0;
 166 }
 167
 168 #define __set_page_ll_data(page, llap) \
 169         do {       \
 170                 page_cache_get(page); \
 171                 SetPagePrivate(page); \
 172                 set_page_private(page, (unsigned long)llap); \
 173         } while (0)
 174 #define __clear_page_ll_data(page) \
 175         do {       \
 176                 ClearPagePrivate(page); \
 177                 set_page_private(page, 0); \
 178                 page_cache_release(page); \
 179         } while(0)
 180
 181 #define kiobuf bio
 182
 183 #include <linux/proc_fs.h>
 184
 185 #ifndef HAVE___D_REHASH
 186 #define __d_rehash(dentry, lock) d_rehash_cond(dentry, lock)
 187 #endif
 188
 189 #ifdef HAVE_CAN_SLEEP_ARG
 190 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 191         flock_lock_file_wait(file, lock, can_sleep)
 192 #else
 193 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 194         flock_lock_file_wait(file, lock)
 195 #endif
 196
 197 #define CheckWriteback(page, cmd) \
 198         (!(!PageWriteback(page) && cmd == OBD_BRW_WRITE))
 199
 200 #ifdef HAVE_PAGE_LIST
 201 static inline int mapping_has_pages(struct address_space *mapping)
 202 {
 203         int rc = 1;
 204
 205         ll_pgcache_lock(mapping);
 206         if (list_empty(&mapping->dirty_pages) &&
 207             list_empty(&mapping->clean_pages) &&
 208             list_empty(&mapping->locked_pages)) {
 209                 rc = 0;
 210         }
 211         ll_pgcache_unlock(mapping);
 212
 213         return rc;
 214 }
 215 #else
 216 static inline int mapping_has_pages(struct address_space *mapping)
 217 {
 218         return mapping->nrpages > 0;
 219 }
 220 #endif
 221
 222 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 223 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 224 #else
 225 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 226 #endif
 227
 228 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 229 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 230 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
 231 #else
 232 #define ll_set_dflags(dentry, flags) do { \
 233                 spin_lock(&dentry->d_lock); \
 234                 dentry->d_flags |= flags; \
 235                 spin_unlock(&dentry->d_lock); \
 236         } while(0)
 237 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path, mode)
 238 #endif
 239
 240 #ifndef container_of
 241 #define container_of(ptr, type, member) ({                      \
 242                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 243                 (type *)( (char *)__mptr - offsetof(type,member) );})
 244 #endif
 245
 246 #ifdef HAVE_I_ALLOC_SEM
 247 #define UP_WRITE_I_ALLOC_SEM(i)   do { up_write(&(i)->i_alloc_sem); } while (0)
 248 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
 249 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 250
 251 #define UP_READ_I_ALLOC_SEM(i)    do { up_read(&(i)->i_alloc_sem); } while (0)
 252 #define DOWN_READ_I_ALLOC_SEM(i)  do { down_read(&(i)->i_alloc_sem); } while (0)
 253 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 254 #else
 255 #define UP_READ_I_ALLOC_SEM(i)              do { } while (0)
 256 #define DOWN_READ_I_ALLOC_SEM(i)            do { } while (0)
 257 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i)  do { } while (0)
 258
 259 #define UP_WRITE_I_ALLOC_SEM(i)             do { } while (0)
 260 #define DOWN_WRITE_I_ALLOC_SEM(i)           do { } while (0)
 261 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) do { } while (0)
 262 #endif
 263
 264 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 265 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 266 #endif
 267
 268 #ifndef HAVE_FILEMAP_FDATAWRITE
 269 #define filemap_fdatawrite(mapping)      filemap_fdatasync(mapping)
 270 #endif
 271
 272 #ifdef HAVE_VFS_KERN_MOUNT
 273 static inline
 274 struct vfsmount *
 275 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 276 {
 277         struct file_system_type *type = get_fs_type(fstype);
 278         struct vfsmount *mnt;
 279         if (!type)
 280                 return ERR_PTR(-ENODEV);
 281         mnt = vfs_kern_mount(type, flags, name, data);
 282         module_put(type->owner);
 283         return mnt;
 284 }
 285 #else
 286 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 287 #endif
 288
 289 #ifndef HAVE_GENERIC_FILE_READ
 290 static inline
 291 ssize_t
 292 generic_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
 293 {
 294         struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
 295         struct kiocb kiocb;
 296         ssize_t ret;
 297
 298         init_sync_kiocb(&kiocb, filp);
 299         kiocb.ki_pos = *ppos;
 300         kiocb.ki_left = len;
 301
 302         ret = generic_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
 303         *ppos = kiocb.ki_pos;
 304         return ret;
 305 }
 306 #endif
 307
 308 #ifndef HAVE_GENERIC_FILE_WRITE
 309 static inline
 310 ssize_t
 311 generic_file_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
 312 {
 313         struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
 314         struct kiocb kiocb;
 315         ssize_t ret;
 316
 317         init_sync_kiocb(&kiocb, filp);
 318         kiocb.ki_pos = *ppos;
 319         kiocb.ki_left = len;
 320
 321         ret = generic_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
 322         *ppos = kiocb.ki_pos;
 323
 324         return ret;
 325 }
 326 #endif
 327
 328 #ifdef HAVE_STATFS_DENTRY_PARAM
 329 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 330 #else
 331 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 332 #endif
 333
 334 /* task_struct */
 335 #ifndef HAVE_TASK_PPTR
 336 #define p_pptr parent
 337 #endif
 338
 339 #ifndef HAVE_SB_TIME_GRAN
 340 #ifndef HAVE_S_TIME_GRAN
 341 #error Need s_time_gran patch!
 342 #endif
 343 static inline u32 get_sb_time_gran(struct super_block *sb)
 344 {
 345         return sb->s_time_gran;
 346 }
 347 #endif
 348
 349 #ifdef HAVE_RW_TREE_LOCK
 350 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 351 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 352 #else
 353 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
 354 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
 355 #endif
 356
 357 #endif /* __KERNEL__ */
 358 #endif /* _COMPAT25_H */