uwb: improved MAS allocator and reservation conflict handling

[safe/jmp/linux-2.6] / include / linux / dcache.h

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index a3f0994..a37359d 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -1,16 +1,15 @@
 #ifndef __LINUX_DCACHE_H
 #define __LINUX_DCACHE_H
 
-#ifdef __KERNEL__
-
 #include <asm/atomic.h>
 #include <linux/list.h>
+#include <linux/rculist.h>
 #include <linux/spinlock.h>
 #include <linux/cache.h>
 #include <linux/rcupdate.h>
-#include <asm/bug.h>
 
 struct nameidata;
+struct path;
 struct vfsmount;
 
 /*
@@ -115,6 +114,18 @@ struct dentry {
        unsigned char d_iname[DNAME_INLINE_LEN_MIN];    /* small names */
 };
 
+/*
+ * dentry->d_lock spinlock nesting subclasses:
+ *
+ * 0: normal
+ * 1: nested
+ */
+enum dentry_d_lock_class
+{
+       DENTRY_D_LOCK_NORMAL, /* implicitly used by plain spin_lock() APIs. */
+       DENTRY_D_LOCK_NESTED
+};
+
 struct dentry_operations {
        int (*d_revalidate)(struct dentry *, struct nameidata *);
        int (*d_hash) (struct dentry *, struct qstr *);
@@ -122,6 +133,7 @@ struct dentry_operations {
        int (*d_delete)(struct dentry *);
        void (*d_release)(struct dentry *);
        void (*d_iput)(struct dentry *, struct inode *);
+       char *(*d_dname)(struct dentry *, char *, int);
 };
 
 /* the dentry parameter passed to d_hash and d_compare is the parent
@@ -163,7 +175,10 @@ d_iput:            no              no              no       yes
 #define DCACHE_REFERENCED      0x0008  /* Recently used, don't discard. */
 #define DCACHE_UNHASHED                0x0010  
 
+#define DCACHE_INOTIFY_PARENT_WATCHED  0x0020 /* Parent inode is watched */
+
 extern spinlock_t dcache_lock;
+extern seqlock_t rename_lock;
 
 /**
  * d_drop - drop a dentry
@@ -208,15 +223,17 @@ static inline int dname_external(struct dentry *dentry)
  */
 extern void d_instantiate(struct dentry *, struct inode *);
 extern struct dentry * d_instantiate_unique(struct dentry *, struct inode *);
+extern struct dentry * d_materialise_unique(struct dentry *, struct inode *);
 extern void d_delete(struct dentry *);
 
 /* allocate/de-allocate */
 extern struct dentry * d_alloc(struct dentry *, const struct qstr *);
-extern struct dentry * d_alloc_anon(struct inode *);
 extern struct dentry * d_splice_alias(struct inode *, struct dentry *);
+extern struct dentry * d_add_ci(struct dentry *, struct inode *, struct qstr *);
+extern struct dentry * d_obtain_alias(struct inode *);
 extern void shrink_dcache_sb(struct super_block *);
 extern void shrink_dcache_parent(struct dentry *);
-extern void shrink_dcache_anon(struct hlist_head *);
+extern void shrink_dcache_for_umount(struct super_block *);
 extern int d_invalidate(struct dentry *);
 
 /* only used at mount-time */
@@ -270,16 +287,25 @@ static inline struct dentry *d_add_unique(struct dentry *entry, struct inode *in
 
 /* used for rename() and baskets */
 extern void d_move(struct dentry *, struct dentry *);
+extern struct dentry *d_ancestor(struct dentry *, struct dentry *);
 
 /* appendix may either be NULL or be used for transname suffixes */
 extern struct dentry * d_lookup(struct dentry *, struct qstr *);
 extern struct dentry * __d_lookup(struct dentry *, struct qstr *);
+extern struct dentry * d_hash_and_lookup(struct dentry *, struct qstr *);
 
 /* validate "insecure" dentry pointer */
 extern int d_validate(struct dentry *, struct dentry *);
 
-extern char * d_path(struct dentry *, struct vfsmount *, char *, int);
-  
+/*
+ * helper function for dentry_operations.d_dname() members
+ */
+extern char *dynamic_dname(struct dentry *, char *, int, const char *, ...);
+
+extern char *__d_path(const struct path *path, struct path *root, char *, int);
+extern char *d_path(const struct path *, char *, int);
+extern char *dentry_path(struct dentry *, char *, int);
+
 /* Allocation counts.. */
 
 /**
@@ -336,11 +362,8 @@ static inline int d_mountpoint(struct dentry *dentry)
 }
 
 extern struct vfsmount *lookup_mnt(struct vfsmount *, struct dentry *);
-extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
 extern struct dentry *lookup_create(struct nameidata *nd, int is_dir);
 
 extern int sysctl_vfs_cache_pressure;
 
-#endif /* __KERNEL__ */
-
 #endif /* __LINUX_DCACHE_H */