#ifndef AFS_LINUX_OSI_COMPAT_H
#define AFS_LINUX_OSI_COMPAT_H
-#ifndef DO_SYNC_READ
+#if defined(HAVE_LINUX_FREEZER_H)
+# include <linux/freezer.h>
+#endif
+
+#ifndef HAVE_LINUX_DO_SYNC_READ
static inline int
do_sync_read(struct file *fp, char *buf, size_t count, loff_t *offp) {
return generic_file_read(fp, buf, count, offp);
}
#elif defined(POSIX_TEST_LOCK_RETURNS_CONFLICT)
struct file_lock *conflict;
- if (conflict = posix_test_lock(fp, flp)) {
+ conflict = posix_test_lock(fp, flp);
+ if (conflict) {
locks_copy_lock(flp, conflict);
flp->fl_type = F_UNLCK;
}
dp->d_flags |= DCACHE_NFSFS_RENAMED;
spin_unlock(&dp->d_lock);
}
+
+static inline int
+afs_linux_nfsfs_renamed(struct dentry *dp) {
+ return dp->d_flags & DCACHE_NFSFS_RENAMED;
+}
+
#else
static inline void afs_linux_clear_nfsfs_renamed(void) { return; }
static inline void afs_linux_set_nfsfs_renamed(void) { return; }
#endif
-#ifndef HAVE_KERNEL_HLIST_UNHASHED
+#ifndef HAVE_LINUX_HLIST_UNHASHED
static void
hlist_unhashed(const struct hlist_node *h) {
return (!h->pprev == NULL);
#define AOP_WRITEPAGE_ACTIVATE WRITEPAGE_ACTIVATE
#endif
-#if defined(HAVE_WRITE_BEGIN) && !defined(HAVE_GRAB_CACHE_PAGE_WRITE_BEGIN)
+#if defined(STRUCT_ADDRESS_SPACE_OPERATIONS_HAS_WRITE_BEGIN) && !defined(HAVE_LINUX_GRAB_CACHE_PAGE_WRITE_BEGIN)
static inline struct page *
grab_cache_page_write_begin(struct address_space *mapping, pgoff_t index,
unsigned int flags) {
}
#endif
+#if defined(HAVE_KMEM_CACHE_T)
+#define afs_kmem_cache_t kmem_cache_t
+#else
+#define afs_kmem_cache_t struct kmem_cache
+#endif
+
+extern void init_once(void *);
+#if defined(HAVE_KMEM_CACHE_T)
+static inline void
+init_once_func(void * foo, kmem_cache_t * cachep, unsigned long flags) {
+#if defined(SLAB_CTOR_VERIFY)
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+#endif
+ init_once(foo);
+}
+#elif defined(KMEM_CACHE_INIT)
+static inline void
+init_once_func(struct kmem_cache * cachep, void * foo) {
+ init_once(foo);
+}
+#elif !defined(KMEM_CACHE_CTOR_TAKES_VOID)
+static inline void
+init_once_func(void * foo, struct kmem_cache * cachep, unsigned long flags) {
+#if defined(SLAB_CTOR_VERIFY)
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+#endif
+ init_once(foo);
+}
+#else
+static inline void
+init_once_func(void * foo) {
+ init_once(foo);
+}
+#endif
+
+#ifndef SLAB_RECLAIM_ACCOUNT
+#define SLAB_RECLAIM_ACCOUNT 0
#endif
+
+#if defined(SLAB_KERNEL)
+#define KALLOC_TYPE SLAB_KERNEL
+#else
+#define KALLOC_TYPE GFP_KERNEL
+#endif
+
+static inline struct key *
+afs_linux_key_alloc(struct key_type *type, const char *desc, uid_t uid,
+ gid_t gid, key_perm_t perm, unsigned long flags)
+{
+#if defined(KEY_ALLOC_NEEDS_STRUCT_TASK)
+ return key_alloc(type, desc, uid, gid, current, perm, flags);
+#elif defined(KEY_ALLOC_NEEDS_CRED)
+ return key_alloc(type, desc, uid, gid, current_cred(), perm, flags);
+#else
+ return key_alloc(type, desc, uid, gid, perm, flags);
+#endif
+}
+
+#if defined(STRUCT_TASK_STRUCT_HAS_CRED)
+static inline struct key*
+afs_linux_search_keyring(afs_ucred_t *cred, struct key_type *type)
+{
+ key_ref_t key_ref;
+
+ if (cred->tgcred->session_keyring) {
+ key_ref = keyring_search(
+ make_key_ref(cred->tgcred->session_keyring, 1),
+ type, "_pag");
+ if (IS_ERR(key_ref))
+ return ERR_CAST(key_ref);
+
+ return key_ref_to_ptr(key_ref);
+ }
+
+ return ERR_PTR(-ENOKEY);
+}
+
+static inline int
+afs_linux_cred_is_current(afs_ucred_t *cred)
+{
+ return (cred == current_cred());
+}
+
+#else
+static inline struct key*
+afs_linux_search_keyring(afs_ucred_t *cred, struct key_type *type)
+{
+ return request_key(type, "_pag", NULL);
+}
+
+static inline int
+afs_linux_cred_is_current(afs_ucred_t *cred)
+{
+ return 1;
+}
+#endif
+
+#ifdef LINUX_KEYRING_SUPPORT
+# ifndef KEY_ALLOC_NOT_IN_QUOTA
+# define KEY_ALLOC_NOT_IN_QUOTA 1
+# endif
+# ifndef KEY_ALLOC_IN_QUOTA
+# define KEY_ALLOC_IN_QUOTA 0
+# endif
+#endif
+
+#ifndef HAVE_LINUX_PAGE_OFFSET
+static inline loff_t
+page_offset(struct page *pp)
+{
+ return (((loff_t) pp->index) << PAGE_CACHE_SHIFT);
+}
+#endif
+
+#ifndef HAVE_LINUX_ZERO_USER_SEGMENTS
+static inline void
+zero_user_segments(struct page *pp, unsigned int from1, unsigned int to1,
+ unsigned int from2, unsigned int to2)
+{
+ void *base = kmap_atomic(pp, KM_USER0);
+
+ if (to1 > from1)
+ memset(base + from1, 0, to1 - from1);
+
+ if (to2 > from2)
+ memset(base + from2, 0, to2 - from2);
+
+ flush_dcache_page(pp);
+ kunmap_atomic(base, KM_USER0);
+}
+
+static inline void
+zero_user_segment(struct page *pp, unsigned int from1, unsigned int to1)
+{
+ zero_user_segments(pp, from1, to1, 0, 0);
+}
+#endif
+
+#ifndef HAVE_LINUX_KERNEL_SETSOCKOPT
+/* Available from 2.6.19 */
+
+static inline int
+kernel_setsockopt(struct socket *sockp, int level, int name, char *val,
+ unsigned int len) {
+ mm_segment_t old_fs = get_fs();
+ int ret;
+
+ set_fs(get_ds());
+ ret = sockp->ops->setsockopt(sockp, level, name, val, len);
+ set_fs(old_fs);
+
+ return ret;
+}
+
+static inline int
+kernel_getsockopt(struct socket *sockp, int level, int name, char *val,
+ int *len) {
+ mm_segment_t old_fs = get_fs();
+ int ret;
+
+ set_fs(get_ds());
+ ret = sockp->ops->getsockopt(sockp, level, name, val, len);
+ set_fs(old_fs);
+
+ return ret;
+}
+#endif
+
+#ifdef HAVE_TRY_TO_FREEZE
+static inline void
+afs_try_to_freeze(void) {
+# ifdef LINUX_REFRIGERATOR_TAKES_PF_FREEZE
+ try_to_freeze(PF_FREEZE);
+# else
+ try_to_freeze();
+# endif
+}
+#else
+static inline void
+afs_try_to_freeze(void) {
+# ifdef CONFIG_PM
+ if (current->flags & PF_FREEZE) {
+ refrigerator(PF_FREEZE);
+ }
+# endif
+}
+#endif
+
+#if !defined(HAVE_LINUX_PAGECHECKED)
+# if defined(HAVE_LINUX_PAGEFSMISC)
+# include <linux/page-flags.h>
+
+# define PageChecked(p) PageFsMisc((p))
+# define SetPageChecked(p) SetPageFsMisc((p))
+# define ClearPageChecked(p) ClearPageFsMisc((p))
+
+# endif
+#endif
+
+#if !defined(NEW_EXPORT_OPS)
+extern struct export_operations export_op_default;
+#endif
+
+static inline struct dentry *
+afs_get_dentry_from_fh(struct super_block *afs_cacheSBp, afs_dcache_id_t *ainode,
+ int cache_fh_len, int cache_fh_type,
+ int (*afs_fh_acceptable)(void *, struct dentry *)) {
+#if defined(NEW_EXPORT_OPS)
+ return afs_cacheSBp->s_export_op->fh_to_dentry(afs_cacheSBp, &ainode->ufs.fh,
+ cache_fh_len, cache_fh_type);
+#else
+ if (afs_cacheSBp->s_export_op && afs_cacheSBp->s_export_op->decode_fh)
+ return afs_cacheSBp->s_export_op->decode_fh(afs_cacheSBp, ainode->ufs.raw,
+ cache_fh_len, cache_fh_type, afs_fh_acceptable, NULL);
+ else
+ return export_op_default.decode_fh(afs_cacheSBp, ainode->ufs.raw,
+ cache_fh_len, cache_fh_type, afs_fh_acceptable, NULL);
+#endif
+}
+
+static inline int
+afs_get_fh_from_dentry(struct dentry *dp, afs_ufs_dcache_id_t *ainode, int *max_lenp) {
+ if (dp->d_sb->s_export_op->encode_fh)
+ return dp->d_sb->s_export_op->encode_fh(dp, &ainode->raw[0], max_lenp, 0);
+#if defined(NEW_EXPORT_OPS)
+ /* If fs doesn't provide an encode_fh method, assume the default INO32 type */
+ *max_lenp = sizeof(struct fid)/4;
+ ainode->fh.i32.ino = dp->d_inode->i_ino;
+ ainode->fh.i32.gen = dp->d_inode->i_generation;
+ return FILEID_INO32_GEN;
+#else
+ /* or call the default encoding function for the old API */
+ return export_op_default.encode_fh(dp, &ainode->raw[0], max_lenp, 0);
+#endif
+}
+
+static inline void
+afs_init_sb_export_ops(struct super_block *sb) {
+#if !defined(NEW_EXPORT_OPS)
+ /*
+ * decode_fh will call this function. If not defined for this FS, make
+ * sure it points to the default
+ */
+ if (!sb->s_export_op->find_exported_dentry) {
+ /* Some kernels (at least 2.6.9) do not prototype find_exported_dentry,
+ * even though it is exported, so prototype it ourselves. Newer
+ * kernels do prototype it, but as long as our protoype matches the
+ * real one (the signature never changed before NEW_EXPORT_OPS came
+ * into play), there should be no problems. */
+ extern struct dentry * find_exported_dentry(struct super_block *sb, void *obj, void *parent,
+ int (*acceptable)(void *context, struct dentry *de),
+ void *context);
+ sb->s_export_op->find_exported_dentry = find_exported_dentry;
+ }
+#endif
+}
+
+static inline void
+afs_linux_lock_inode(struct inode *ip) {
+#ifdef STRUCT_INODE_HAS_I_MUTEX
+ mutex_lock(&ip->i_mutex);
+#else
+ down(&ip->i_sem);
+#endif
+}
+
+static inline void
+afs_linux_unlock_inode(struct inode *ip) {
+#ifdef STRUCT_INODE_HAS_I_MUTEX
+ mutex_unlock(&ip->i_mutex);
+#else
+ up(&ip->i_sem);
+#endif
+}
+
+static inline int
+afs_inode_setattr(struct osi_file *afile, struct iattr *newattrs) {
+
+ int code = 0;
+ struct inode *inode = OSIFILE_INODE(afile);
+#if !defined(HAVE_LINUX_INODE_SETATTR)
+ code = inode->i_op->setattr(afile->filp->f_dentry, newattrs);
+#elif defined(INODE_SETATTR_NOT_VOID)
+ if (inode->i_op && inode->i_op->setattr)
+ code = inode->i_op->setattr(afile->filp->f_dentry, newattrs);
+ else
+ code = inode_setattr(inode, newattrs);
+#else
+ inode_setattr(inode, newattrs);
+#endif
+ return code;
+}
+
+#endif /* AFS_LINUX_OSI_COMPAT_H */
git://git.openafs.org / openafs.git / blobdiff