/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
+#ifndef _FS_FUSE_I_H
+#define _FS_FUSE_I_H
+
#include <linux/fuse.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/backing-dev.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
+#include <linux/rbtree.h>
+#include <linux/poll.h>
/** Max number of pages that can be used in a single read request */
#define FUSE_MAX_PAGES_PER_REQ 32
-/** Maximum number of outstanding background requests */
-#define FUSE_MAX_BACKGROUND 12
-
-/** Congestion starts at 75% of maximum */
-#define FUSE_CONGESTION_THRESHOLD (FUSE_MAX_BACKGROUND * 75 / 100)
-
/** Bias for fi->writectr, meaning new writepages must not be sent */
#define FUSE_NOWRITE INT_MIN
#define FUSE_NAME_MAX 1024
/** Number of dentries for each connection in the control filesystem */
-#define FUSE_CTL_NUM_DENTRIES 3
+#define FUSE_CTL_NUM_DENTRIES 5
/** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
module will check permissions based on the file mode. Otherwise no
/** Global mutex protecting fuse_conn_list and the control filesystem */
extern struct mutex fuse_mutex;
+/** Module parameters */
+extern unsigned max_user_bgreq;
+extern unsigned max_user_congthresh;
+
/** FUSE inode */
struct fuse_inode {
/** Inode data */
struct list_head writepages;
};
+struct fuse_conn;
+
/** FUSE specific file data */
struct fuse_file {
+ /** Fuse connection for this file */
+ struct fuse_conn *fc;
+
/** Request reserved for flush and release */
struct fuse_req *reserved_req;
+ /** Kernel file handle guaranteed to be unique */
+ u64 kh;
+
/** File handle used by userspace */
u64 fh;
+ /** Node id of this file */
+ u64 nodeid;
+
/** Refcount */
atomic_t count;
+ /** FOPEN_* flags returned by open */
+ u32 open_flags;
+
/** Entry on inode's write_files list */
struct list_head write_entry;
+
+ /** RB node to be linked on fuse_conn->polled_files */
+ struct rb_node polled_node;
+
+ /** Wait queue head for poll */
+ wait_queue_head_t poll_wait;
};
/** One input argument of a request */
FUSE_REQ_FINISHED
};
-struct fuse_conn;
-
/**
* A request to the client
*/
struct fuse_forget_in forget_in;
struct {
struct fuse_release_in in;
- struct vfsmount *vfsmount;
- struct dentry *dentry;
+ struct path path;
} release;
struct fuse_init_in init_in;
struct fuse_init_out init_out;
- struct fuse_read_in read_in;
+ struct cuse_init_in cuse_init_in;
+ struct cuse_init_out cuse_init_out;
+ struct {
+ struct fuse_read_in in;
+ u64 attr_ver;
+ } read;
struct {
struct fuse_write_in in;
struct fuse_write_out out;
/** The list of requests under I/O */
struct list_head io;
+ /** The next unique kernel file handle */
+ u64 khctr;
+
+ /** rbtree of fuse_files waiting for poll events indexed by ph */
+ struct rb_root polled_files;
+
+ /** Maximum number of outstanding background requests */
+ unsigned max_background;
+
+ /** Number of background requests at which congestion starts */
+ unsigned congestion_threshold;
+
/** Number of requests currently in the background */
unsigned num_background;
/** Connection failed (version mismatch). Cannot race with
setting other bitfields since it is only set once in INIT
reply, before any other request, and never cleared */
- unsigned conn_error : 1;
+ unsigned conn_error:1;
/** Connection successful. Only set in INIT */
- unsigned conn_init : 1;
+ unsigned conn_init:1;
/** Do readpages asynchronously? Only set in INIT */
- unsigned async_read : 1;
+ unsigned async_read:1;
/** Do not send separate SETATTR request before open(O_TRUNC) */
- unsigned atomic_o_trunc : 1;
+ unsigned atomic_o_trunc:1;
+
+ /** Filesystem supports NFS exporting. Only set in INIT */
+ unsigned export_support:1;
+
+ /** Set if bdi is valid */
+ unsigned bdi_initialized:1;
/*
* The following bitfields are only for optimization purposes
*/
/** Is fsync not implemented by fs? */
- unsigned no_fsync : 1;
+ unsigned no_fsync:1;
/** Is fsyncdir not implemented by fs? */
- unsigned no_fsyncdir : 1;
+ unsigned no_fsyncdir:1;
/** Is flush not implemented by fs? */
- unsigned no_flush : 1;
+ unsigned no_flush:1;
/** Is setxattr not implemented by fs? */
- unsigned no_setxattr : 1;
+ unsigned no_setxattr:1;
/** Is getxattr not implemented by fs? */
- unsigned no_getxattr : 1;
+ unsigned no_getxattr:1;
/** Is listxattr not implemented by fs? */
- unsigned no_listxattr : 1;
+ unsigned no_listxattr:1;
/** Is removexattr not implemented by fs? */
- unsigned no_removexattr : 1;
+ unsigned no_removexattr:1;
/** Are file locking primitives not implemented by fs? */
- unsigned no_lock : 1;
+ unsigned no_lock:1;
/** Is access not implemented by fs? */
- unsigned no_access : 1;
+ unsigned no_access:1;
/** Is create not implemented by fs? */
- unsigned no_create : 1;
+ unsigned no_create:1;
/** Is interrupt not implemented by fs? */
- unsigned no_interrupt : 1;
+ unsigned no_interrupt:1;
/** Is bmap not implemented by fs? */
- unsigned no_bmap : 1;
+ unsigned no_bmap:1;
+
+ /** Is poll not implemented by fs? */
+ unsigned no_poll:1;
+
+ /** Do multi-page cached writes */
+ unsigned big_writes:1;
+
+ /** Don't apply umask to creation modes */
+ unsigned dont_mask:1;
/** The number of requests waiting for completion */
atomic_t num_waiting;
/** Version counter for attribute changes */
u64 attr_version;
+
+ /** Called on final put */
+ void (*release)(struct fuse_conn *);
+
+ /** Super block for this connection. */
+ struct super_block *sb;
+
+ /** Read/write semaphore to hold when accessing sb. */
+ struct rw_semaphore killsb;
};
static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
/** Device operations */
extern const struct file_operations fuse_dev_operations;
+extern const struct dentry_operations fuse_dentry_operations;
+
+/**
+ * Inode to nodeid comparison.
+ */
+int fuse_inode_eq(struct inode *inode, void *_nodeidp);
+
/**
* Get a filled in inode
*/
-struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
+struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
int generation, struct fuse_attr *attr,
u64 attr_valid, u64 attr_version);
+int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
+ struct fuse_entry_out *outarg, struct inode **inode);
+
/**
* Send FORGET command
*/
void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,
- unsigned long nodeid, u64 nlookup);
+ u64 nodeid, u64 nlookup);
/**
* Initialize READ or READDIR request
*/
void fuse_read_fill(struct fuse_req *req, struct file *file,
- struct inode *inode, loff_t pos, size_t count, int opcode);
+ loff_t pos, size_t count, int opcode);
/**
* Send OPEN or OPENDIR request
*/
-int fuse_open_common(struct inode *inode, struct file *file, int isdir);
+int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
-struct fuse_file *fuse_file_alloc(void);
+struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
+struct fuse_file *fuse_file_get(struct fuse_file *ff);
void fuse_file_free(struct fuse_file *ff);
-void fuse_finish_open(struct inode *inode, struct file *file,
- struct fuse_file *ff, struct fuse_open_out *outarg);
+void fuse_finish_open(struct inode *inode, struct file *file);
-/** Fill in ff->reserved_req with a RELEASE request */
-void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode);
+void fuse_sync_release(struct fuse_file *ff, int flags);
/**
* Send RELEASE or RELEASEDIR request
*/
-int fuse_release_common(struct inode *inode, struct file *file, int isdir);
+void fuse_release_common(struct file *file, int opcode);
/**
* Send FSYNC or FSYNCDIR request
int isdir);
/**
+ * Notify poll wakeup
+ */
+int fuse_notify_poll_wakeup(struct fuse_conn *fc,
+ struct fuse_notify_poll_wakeup_out *outarg);
+
+/**
* Initialize file operations on a regular file
*/
void fuse_init_file_inode(struct inode *inode);
void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
u64 attr_valid);
-void fuse_truncate(struct address_space *mapping, loff_t offset);
-
/**
* Initialize the client device
*/
/**
* Send a request (synchronous)
*/
-void request_send(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request with no reply
*/
-void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request in the background
*/
-void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req);
-void request_send_background_locked(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send_background_locked(struct fuse_conn *fc,
+ struct fuse_req *req);
/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc);
*/
void fuse_invalidate_attr(struct inode *inode);
+void fuse_invalidate_entry_cache(struct dentry *entry);
+
/**
* Acquire reference to fuse_conn
*/
struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
+void fuse_conn_kill(struct fuse_conn *fc);
+
+/**
+ * Initialize fuse_conn
+ */
+void fuse_conn_init(struct fuse_conn *fc);
+
/**
* Release reference to fuse_conn
*/
void fuse_set_nowrite(struct inode *inode);
void fuse_release_nowrite(struct inode *inode);
+
+u64 fuse_get_attr_version(struct fuse_conn *fc);
+
+/**
+ * File-system tells the kernel to invalidate cache for the given node id.
+ */
+int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid,
+ loff_t offset, loff_t len);
+
+/**
+ * File-system tells the kernel to invalidate parent attributes and
+ * the dentry matching parent/name.
+ */
+int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
+ struct qstr *name);
+
+int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
+ bool isdir);
+ssize_t fuse_direct_io(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos, int write);
+long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
+ unsigned int flags);
+unsigned fuse_file_poll(struct file *file, poll_table *wait);
+int fuse_dev_release(struct inode *inode, struct file *file);
+
+#endif /* _FS_FUSE_I_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff