| /* |
| FUSE: Filesystem in Userspace |
| Copyright (C) 2001 Miklos Szeredi (mszeredi@inf.bme.hu) |
| |
| This program can be distributed under the terms of the GNU GPL. |
| See the file COPYING. |
| */ |
| |
| #include <linux/fuse.h> |
| |
| #include <linux/modversions.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/fs.h> |
| #include <linux/list.h> |
| #include <linux/spinlock.h> |
| #include <linux/rwsem.h> |
| |
| #define MAX_CLEARED 256 |
| |
| /** |
| * A Fuse connection. |
| * |
| * This structure is created, when the client device is opened, and is |
| * destroyed, when the client device is closed _and_ the filesystem is |
| * umounted. |
| */ |
| struct fuse_conn { |
| /** The superblock of the mounted filesystem */ |
| struct super_block *sb; |
| |
| /** The opened client device */ |
| struct file *file; |
| |
| /** The client wait queue */ |
| wait_queue_head_t waitq; |
| |
| /** The list of pending requests */ |
| struct list_head pending; |
| |
| /** The list of requests being processed */ |
| struct list_head processing; |
| |
| /** The request id */ |
| int reqctr; |
| }; |
| |
| /** |
| * A request to the client |
| */ |
| struct fuse_req { |
| /** The request list */ |
| struct list_head list; |
| |
| /** The request ID */ |
| int unique; |
| |
| /** The opcode */ |
| enum fuse_opcode opcode; |
| |
| /** The request input size */ |
| unsigned int insize; |
| |
| /** The request input */ |
| char *in; |
| |
| /** The maximum request output size */ |
| unsigned int outsize; |
| |
| /** The request output */ |
| char *out; |
| |
| /** The request wait queue */ |
| wait_queue_head_t waitq; |
| }; |
| |
| |
| #define INO_FC(inode) ((struct fuse_conn *) (inode)->i_sb->u.generic_sbp) |
| #define DEV_FC(file) ((struct fuse_conn *) (file)->private_data) |
| |
| struct fuse_in { |
| struct fuse_in_header h; |
| unsigned int argsize; |
| const void *arg; |
| }; |
| |
| struct fuse_out { |
| struct fuse_out_header h; |
| unsigned int argsize; |
| unsigned int argvar; |
| void *arg; |
| }; |
| |
| #define FUSE_IN_INIT { {0, 0, 0, current->fsuid, current->fsgid}, 0, 0 } |
| #define FUSE_OUT_INIT { {0, 0}, 0, 0, 0 } |
| |
| |
| /** |
| * The proc entry for the client device ("/proc/fs/fuse/dev") |
| */ |
| extern struct proc_dir_entry *proc_fuse_dev; |
| |
| /** |
| * The lock to protect fuses structures |
| */ |
| extern spinlock_t fuse_lock; |
| |
| |
| /** |
| * Get a filled in inode |
| */ |
| struct inode *fuse_iget(struct super_block *sb, ino_t ino, |
| struct fuse_attr *attr, int version); |
| |
| |
| /** |
| * Initialise operations on regular file |
| */ |
| void fuse_init_file_inode(struct inode *inode); |
| |
| /** |
| * Check if the connection can be released, and if yes, then free the |
| * connection structure |
| */ |
| void fuse_release_conn(struct fuse_conn *fc); |
| |
| /** |
| * Initialize the client device |
| */ |
| int fuse_dev_init(void); |
| |
| /** |
| * Cleanup the client device |
| */ |
| void fuse_dev_cleanup(void); |
| |
| /** |
| * Initialize the fuse filesystem |
| */ |
| int fuse_fs_init(void); |
| |
| /** |
| * Cleanup the fuse filesystem |
| */ |
| void fuse_fs_cleanup(void); |
| |
| /** |
| * Send a request |
| * |
| */ |
| void request_send(struct fuse_conn *fc, struct fuse_in *in, |
| struct fuse_out *out); |
| |
| /* |
| * Local Variables: |
| * indent-tabs-mode: t |
| * c-basic-offset: 8 |
| */ |