/** 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)
+
+
/** FUSE inode */
struct fuse_inode {
/** Inode data */
* and kernel */
u64 nodeid;
+ /** Number of lookups on this inode */
+ u64 nlookup;
+
+ /** The request used for sending the FORGET message */
+ struct fuse_req *forget_req;
+
/** Time in jiffies until the file attributes are valid */
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;
lists in fuse_conn */
struct list_head list;
+ /** Entry on the background list */
+ struct list_head bg_entry;
+
/** refcount */
atomic_t count;
/** 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;
* 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 group id for this mount */
+ gid_t group_id;
+
+ /** The fuse mount flags for this mount */
+ unsigned flags;
+
+ /** Maximum read size */
+ unsigned max_read;
+
+ /** Maximum write size */
+ unsigned max_write;
+
/** Readers of the connection are waiting on this */
wait_queue_head_t waitq;
/** 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;
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 fsyncdir not implemented by fs? */
+ unsigned no_fsyncdir : 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;
};
* - 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
*/
extern spinlock_t fuse_lock;
+/**
+ * Get a filled in inode
+ */
+struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
+ int generation, struct fuse_attr *attr);
+
+/**
+ * Send FORGET command
+ */
+void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,
+ unsigned long nodeid, u64 nlookup);
+
+/**
+ * Send READ or READDIR request
+ */
+size_t fuse_send_read_common(struct fuse_req *req, struct file *file,
+ struct inode *inode, loff_t pos, size_t count,
+ int isdir);
+
+/**
+ * Send OPEN or OPENDIR request
+ */
+int fuse_open_common(struct inode *inode, struct file *file, int isdir);
+
+/**
+ * Send RELEASE or RELEASEDIR request
+ */
+int fuse_release_common(struct inode *inode, struct file *file, int isdir);
+
+/**
+ * Send FSYNC or FSYNCDIR request
+ */
+int fuse_fsync_common(struct file *file, struct dentry *de, int datasync,
+ int isdir);
+
+/**
+ * Initialize file operations on a regular file
+ */
+void fuse_init_file_inode(struct inode *inode);
+
+/**
+ * Initialize inode operations on regular files and special files
+ */
+void fuse_init_common(struct inode *inode);
+
+/**
+ * Initialize inode and file operations on a directory
+ */
+void fuse_init_dir(struct inode *inode);
+
+/**
+ * Initialize inode operations on a symlink
+ */
+void fuse_init_symlink(struct inode *inode);
+
+/**
+ * Change attributes of an inode
+ */
+void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr);
+
/**
* Check if the connection can be released, and if yes, then free the
* connection structure
*/
struct fuse_req *fuse_get_request(struct fuse_conn *fc);
-/**
- * Reserve a preallocated request, only interruptible by SIGKILL
- */
-struct fuse_req *fuse_get_request_nonint(struct fuse_conn *fc);
-
/**
* Decrement reference count of a request. If count goes to zero put
- * on unused list (preallocated) or free reqest (not preallocated).
+ * on unused list (preallocated) or free request (not preallocated).
*/
void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req);
/**
- * Send a request (synchronous, interruptible)
+ * Send a request (synchronous)
*/
void request_send(struct fuse_conn *fc, struct fuse_req *req);
-/**
- * Send a request (synchronous, non-interruptible except by SIGKILL)
- */
-void request_send_nonint(struct fuse_conn *fc, struct fuse_req *req);
-
/**
* Send a request with no reply
*/
*/
void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
+/**
+ * Release inodes and file associated with background request
+ */
+void fuse_release_background(struct fuse_req *req);
+
+/**
+ * Get the attributes of a file
+ */
+int fuse_do_getattr(struct inode *inode);
+
+/**
+ * Invalidate inode attributes
+ */
+void fuse_invalidate_attr(struct inode *inode);
+
/**
* Send the INIT message
*/
projects / linux-2.6 / blobdiff