[PATCH] FUSE - extended attribute operations

[linux-2.6] / fs / fuse / fuse_i.h

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 87d25b8f2dc18ffe062ce350a5083f591d750817..86183c5621048fccaeb680a8ebc5ef05502cbca7 100644 (file)
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -21,6 +21,19 @@
 /** If more requests are outstanding, then the operation will block */
 #define FUSE_MAX_OUTSTANDING 10
 
+/** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
+    module will check permissions based on the file mode.  Otherwise no
+    permission checking is done in the kernel */
+#define FUSE_DEFAULT_PERMISSIONS (1 << 0)
+
+/** If the FUSE_ALLOW_OTHER flag is given, then not only the user
+    doing the mount will be allowed to access the filesystem */
+#define FUSE_ALLOW_OTHER         (1 << 1)
+
+/** If the FUSE_KERNEL_CACHE flag is given, then cached data will not
+    be flushed on open */
+#define FUSE_KERNEL_CACHE        (1 << 2)
+
 /** FUSE inode */
 struct fuse_inode {
        /** Inode data */
@@ -40,6 +53,15 @@ struct fuse_inode {
        unsigned long i_time;
 };
 
+/** FUSE specific file data */
+struct fuse_file {
+       /** Request reserved for flush and release */
+       struct fuse_req *release_req;
+
+       /** File handle used by userspace */
+       u64 fh;
+};
+
 /** One input argument of a request */
 struct fuse_in_arg {
        unsigned size;
@@ -100,6 +122,9 @@ struct fuse_req {
            lists in fuse_conn */
        struct list_head list;
 
+       /** Entry on the background list */
+       struct list_head bg_entry;
+
        /** refcount */
        atomic_t count;
 
@@ -136,6 +161,7 @@ struct fuse_req {
        /** Data for asynchronous requests */
        union {
                struct fuse_forget_in forget_in;
+               struct fuse_release_in release_in;
                struct fuse_init_in_out init_in_out;
        } misc;
 
@@ -166,15 +192,15 @@ struct fuse_req {
  * unmounted.
  */
 struct fuse_conn {
-       /** The superblock of the mounted filesystem */
-       struct super_block *sb;
-
-       /** The opened client device */
-       struct file *file;
+       /** Reference count */
+       int count;
 
        /** The user id for this mount */
        uid_t user_id;
 
+       /** The fuse mount flags for this mount */
+       unsigned flags;
+
        /** Readers of the connection are waiting on this */
        wait_queue_head_t waitq;
 
@@ -184,6 +210,10 @@ struct fuse_conn {
        /** The list of requests being processed */
        struct list_head processing;
 
+       /** Requests put in the background (RELEASE or any other
+           interrupted request) */
+       struct list_head background;
+
        /** Controls the maximum number of outstanding requests */
        struct semaphore outstanding_sem;
 
@@ -191,15 +221,42 @@ struct fuse_conn {
            outstanding_sem would go negative */
        unsigned outstanding_debt;
 
+       /** RW semaphore for exclusion with fuse_put_super() */
+       struct rw_semaphore sbput_sem;
+
        /** The list of unused requests */
        struct list_head unused_list;
 
        /** The next unique request id */
        u64 reqctr;
 
+       /** Mount is active */
+       unsigned mounted : 1;
+
+       /** Connection established */
+       unsigned connected : 1;
+
        /** Connection failed (version mismatch) */
        unsigned conn_error : 1;
 
+       /** Is fsync not implemented by fs? */
+       unsigned no_fsync : 1;
+
+       /** Is flush not implemented by fs? */
+       unsigned no_flush : 1;
+
+       /** Is setxattr not implemented by fs? */
+       unsigned no_setxattr : 1;
+
+       /** Is getxattr not implemented by fs? */
+       unsigned no_getxattr : 1;
+
+       /** Is listxattr not implemented by fs? */
+       unsigned no_listxattr : 1;
+
+       /** Is removexattr not implemented by fs? */
+       unsigned no_removexattr : 1;
+
        /** Backing dev info */
        struct backing_dev_info bdi;
 };
@@ -245,6 +302,7 @@ extern struct file_operations fuse_dev_operations;
  *  - the private_data field of the device file
  *  - the s_fs_info field of the super block
  *  - unused_list, pending, processing lists in fuse_conn
+ *  - background list in fuse_conn
  *  - the unique request ID counter reqctr in fuse_conn
  *  - the sb (super_block) field in fuse_conn
  *  - the file (device file) field in fuse_conn
@@ -263,6 +321,11 @@ struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
 void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,
                      unsigned long nodeid, u64 nlookup);
 
+/**
+ * Initialise file operations on a regular file
+ */
+void fuse_init_file_inode(struct inode *inode);
+
 /**
  * Initialise inode operations on regular files and special files
  */
@@ -350,6 +413,11 @@ void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
  */
 void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
 
+/**
+ * Release inodes and file assiciated with background request
+ */
+void fuse_release_background(struct fuse_req *req);
+
 /**
  * Get the attributes of a file
  */