[PATCH] x86_64: Allocate PDAs in the local node

[linux-2.6-omap-h63xx.git] / include / linux / relayfs_fs.h

diff --git a/include/linux/relayfs_fs.h b/include/linux/relayfs_fs.h
index cfafc3e76bc2bb2faaaa012fd0d27b17d90e10a5..7342e66247fbe120b2a2f0fcb6ffd63ebb20d004 100644 (file)
--- a/include/linux/relayfs_fs.h
+++ b/include/linux/relayfs_fs.h
@@ -20,9 +20,9 @@
 #include <linux/kref.h>
 
 /*
- * Tracks changes to rchan_buf struct
+ * Tracks changes to rchan/rchan_buf structs
  */
-#define RELAYFS_CHANNEL_VERSION                5
+#define RELAYFS_CHANNEL_VERSION                6
 
 /*
  * Per-cpu relay channel buffer
@@ -60,23 +60,10 @@ struct rchan
        struct rchan_callbacks *cb;     /* client callbacks */
        struct kref kref;               /* channel refcount */
        void *private_data;             /* for user-defined data */
+       size_t last_toobig;             /* tried to log event > subbuf size */
        struct rchan_buf *buf[NR_CPUS]; /* per-cpu channel buffers */
 };
 
-/*
- * Relayfs inode
- */
-struct relayfs_inode_info
-{
-       struct inode vfs_inode;
-       struct rchan_buf *buf;
-};
-
-static inline struct relayfs_inode_info *RELAYFS_I(struct inode *inode)
-{
-       return container_of(inode, struct relayfs_inode_info, vfs_inode);
-}
-
 /*
  * Relay channel client callbacks
  */
@@ -123,6 +110,46 @@ struct rchan_callbacks
         */
         void (*buf_unmapped)(struct rchan_buf *buf,
                             struct file *filp);
+       /*
+        * create_buf_file - create file to represent a relayfs channel buffer
+        * @filename: the name of the file to create
+        * @parent: the parent of the file to create
+        * @mode: the mode of the file to create
+        * @buf: the channel buffer
+        * @is_global: outparam - set non-zero if the buffer should be global
+        *
+        * Called during relay_open(), once for each per-cpu buffer,
+        * to allow the client to create a file to be used to
+        * represent the corresponding channel buffer.  If the file is
+        * created outside of relayfs, the parent must also exist in
+        * that filesystem.
+        *
+        * The callback should return the dentry of the file created
+        * to represent the relay buffer.
+        *
+        * Setting the is_global outparam to a non-zero value will
+        * cause relay_open() to create a single global buffer rather
+        * than the default set of per-cpu buffers.
+        *
+        * See Documentation/filesystems/relayfs.txt for more info.
+        */
+       struct dentry *(*create_buf_file)(const char *filename,
+                                         struct dentry *parent,
+                                         int mode,
+                                         struct rchan_buf *buf,
+                                         int *is_global);
+
+       /*
+        * remove_buf_file - remove file representing a relayfs channel buffer
+        * @dentry: the dentry of the file to remove
+        *
+        * Called during relay_close(), once for each per-cpu buffer,
+        * to allow the client to remove a file used to represent a
+        * channel buffer.
+        *
+        * The callback should return 0 if successful, negative if not.
+        */
+       int (*remove_buf_file)(struct dentry *dentry);
 };
 
 /*
@@ -147,6 +174,12 @@ extern size_t relay_switch_subbuf(struct rchan_buf *buf,
 extern struct dentry *relayfs_create_dir(const char *name,
                                         struct dentry *parent);
 extern int relayfs_remove_dir(struct dentry *dentry);
+extern struct dentry *relayfs_create_file(const char *name,
+                                         struct dentry *parent,
+                                         int mode,
+                                         struct file_operations *fops,
+                                         void *data);
+extern int relayfs_remove_file(struct dentry *dentry);
 
 /**
  *     relay_write - write data into the channel
@@ -246,10 +279,9 @@ static inline void subbuf_start_reserve(struct rchan_buf *buf,
 }
 
 /*
- * exported relayfs file operations, fs/relayfs/inode.c
+ * exported relay file operations, fs/relayfs/inode.c
  */
-
-extern struct file_operations relayfs_file_operations;
+extern struct file_operations relay_file_operations;
 
 #endif /* _LINUX_RELAYFS_FS_H */