+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) && LINUX_VERSION_CODE < KERNEL_VERSION(2,5,69)
+#error sorry, lustre requires at least 2.5.69
+#endif
+
+#include <libcfs/linux/portals_compat25.h>
+
+#include <linux/lustre_patchless_compat.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
+struct ll_iattr {
+ struct iattr iattr;
+ unsigned int ia_attr_flags;
+};
+#else
+#define ll_iattr iattr
+#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
+
+#ifndef HAVE_SET_FS_PWD
+static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
+ struct dentry *dentry)
+{
+ struct dentry *old_pwd;
+ struct vfsmount *old_pwdmnt;
+
+ write_lock(&fs->lock);
+ old_pwd = fs->pwd;
+ old_pwdmnt = fs->pwdmnt;
+ fs->pwdmnt = mntget(mnt);
+ fs->pwd = dget(dentry);
+ write_unlock(&fs->lock);
+
+ if (old_pwd) {
+ dput(old_pwd);
+ mntput(old_pwdmnt);
+ }
+}
+#else
+#define ll_set_fs_pwd set_fs_pwd
+#endif /* HAVE_SET_FS_PWD */
+
+/*
+ * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
+ * ATTR_* attributes (see bug 13828)
+ */
+#define ATTR_BLOCKS (1 << 27)
+
+#if HAVE_INODE_I_MUTEX
+#define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
+#define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
+#define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
+#else
+#define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
+#define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
+#define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
+#endif /* HAVE_INODE_I_MUTEX */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
+#define d_child d_u.d_child
+#define d_rcu d_u.d_rcu
+#endif
+
+#ifdef HAVE_DQUOTOFF_MUTEX
+#define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
+#define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
+#else
+#define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
+#define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
+#endif /* HAVE_DQUOTOFF_MUTEX */
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
+#define NGROUPS_SMALL NGROUPS
+#define NGROUPS_PER_BLOCK ((int)(EXEC_PAGESIZE / sizeof(gid_t)))
+
+struct group_info {
+ int ngroups;
+ atomic_t usage;
+ gid_t small_block[NGROUPS_SMALL];
+ int nblocks;
+ gid_t *blocks[0];
+};
+#define current_ngroups current->ngroups
+#define current_groups current->groups
+
+struct group_info *groups_alloc(int gidsetsize);
+void groups_free(struct group_info *ginfo);
+#else /* >= 2.6.4 */
+
+#define current_ngroups current->group_info->ngroups
+#define current_groups current->group_info->small_block
+
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4) */
+
+#ifndef page_private
+#define page_private(page) ((page)->private)
+#define set_page_private(page, v) ((page)->private = (v))
+#endif
+
+#ifndef HAVE_GFP_T
+#define gfp_t int
+#endif
+
+#define lock_dentry(___dentry) spin_lock(&(___dentry)->d_lock)
+#define unlock_dentry(___dentry) spin_unlock(&(___dentry)->d_lock)
+
+#define lock_24kernel() do {} while (0)
+#define unlock_24kernel() do {} while (0)
+#define ll_kernel_locked() kernel_locked()
+
+/*
+ * OBD need working random driver, thus all our
+ * initialization routines must be called after device
+ * driver initialization
+ */
+#ifndef MODULE
+#undef module_init
+#define module_init(a) late_initcall(a)
+#endif
+
+/* XXX our code should be using the 2.6 calls, not the other way around */
+#define TryLockPage(page) TestSetPageLocked(page)
+#define Page_Uptodate(page) PageUptodate(page)
+#define ll_redirty_page(page) set_page_dirty(page)
+
+#define KDEVT_INIT(val) (val)
+
+#define LTIME_S(time) (time.tv_sec)
+#define ll_path_lookup path_lookup
+#define ll_permission(inode,mask,nd) permission(inode,mask,nd)
+
+#define ll_pgcache_lock(mapping) spin_lock(&mapping->page_lock)
+#define ll_pgcache_unlock(mapping) spin_unlock(&mapping->page_lock)
+#define ll_call_writepage(inode, page) \
+ (inode)->i_mapping->a_ops->writepage(page, NULL)
+#define ll_invalidate_inode_pages(inode) \
+ invalidate_inode_pages((inode)->i_mapping)
+#define ll_truncate_complete_page(page) \
+ truncate_complete_page(page->mapping, page)
+
+#define ll_vfs_create(a,b,c,d) vfs_create(a,b,c,d)
+#define ll_dev_t dev_t
+#define kdev_t dev_t
+#define to_kdev_t(dev) (dev)
+#define kdev_t_to_nr(dev) (dev)
+#define val_to_kdev(dev) (dev)
+#define ILOOKUP(sb, ino, test, data) ilookup5(sb, ino, test, data);
+
+#include <linux/writeback.h>
+
+static inline int cleanup_group_info(void)
+{
+ struct group_info *ginfo;
+
+ ginfo = groups_alloc(0);
+ if (!ginfo)
+ return -ENOMEM;
+
+ set_current_groups(ginfo);
+ put_group_info(ginfo);
+
+ return 0;
+}
+
+#define __set_page_ll_data(page, llap) \
+ do { \
+ page_cache_get(page); \
+ SetPagePrivate(page); \
+ set_page_private(page, (unsigned long)llap); \
+ } while (0)
+#define __clear_page_ll_data(page) \
+ do { \
+ ClearPagePrivate(page); \
+ set_page_private(page, 0); \
+ page_cache_release(page); \
+ } while(0)
+
+#define kiobuf bio
+
+#include <linux/proc_fs.h>
+
+#ifndef HAVE___D_REHASH
+#define __d_rehash(dentry, lock) d_rehash_cond(dentry, lock)
+#endif
+
+#ifdef HAVE_CAN_SLEEP_ARG
+#define ll_flock_lock_file_wait(file, lock, can_sleep) \
+ flock_lock_file_wait(file, lock, can_sleep)
+#else
+#define ll_flock_lock_file_wait(file, lock, can_sleep) \
+ flock_lock_file_wait(file, lock)
+#endif
+
+#define CheckWriteback(page, cmd) \
+ (!(!PageWriteback(page) && cmd == OBD_BRW_WRITE))
+
+#ifdef HAVE_PAGE_LIST
+static inline int mapping_has_pages(struct address_space *mapping)
+{
+ int rc = 1;
+
+ ll_pgcache_lock(mapping);
+ if (list_empty(&mapping->dirty_pages) &&
+ list_empty(&mapping->clean_pages) &&
+ list_empty(&mapping->locked_pages)) {
+ rc = 0;
+ }
+ ll_pgcache_unlock(mapping);
+
+ return rc;
+}