#define FUSE_MAX_PAGES_PER_REQ 32
/** Maximum number of outstanding background requests */
-#define FUSE_MAX_BACKGROUND 10
+#define FUSE_MAX_BACKGROUND 12
+
+/** Congestion starts at 75% of maximum */
+#define FUSE_CONGESTION_THRESHOLD (FUSE_MAX_BACKGROUND * 75 / 100)
/** It could be as large as PATH_MAX, but would that have any uses? */
#define FUSE_NAME_MAX 1024
/** Time in jiffies until the file attributes are valid */
u64 i_time;
+
+ /** The sticky bit in inode->i_mode may have been removed, so
+ preserve the original mode */
+ mode_t orig_i_mode;
+
+ /** Version of last attribute change */
+ u64 attr_version;
+
+ /** Files usable in writepage. Protected by fc->lock */
+ struct list_head write_files;
};
/** FUSE specific file data */
/** File handle used by userspace */
u64 fh;
+
+ /** Refcount */
+ atomic_t count;
+
+ /** Entry on inode's write_files list */
+ struct list_head write_entry;
};
/** One input argument of a request */
struct fuse_init_in init_in;
struct fuse_init_out init_out;
struct fuse_read_in read_in;
+ struct {
+ struct fuse_write_in in;
+ struct fuse_write_out out;
+ } write;
struct fuse_lk_in lk_in;
} misc;
unsigned page_offset;
/** File used in the request (or NULL) */
- struct file *file;
+ struct fuse_file *ff;
/** vfsmount used in release */
struct vfsmount *vfsmount;
/** waitq for blocked connection */
wait_queue_head_t blocked_waitq;
+ /** waitq for reserved requests */
+ wait_queue_head_t reserved_req_waitq;
+
/** The next unique request id */
u64 reqctr;
/** Do readpages asynchronously? Only set in INIT */
unsigned async_read : 1;
+ /** Do not send separate SETATTR request before open(O_TRUNC) */
+ unsigned atomic_o_trunc : 1;
+
/*
* The following bitfields are only for optimization purposes
* and hence races in setting them will not cause malfunction
/** Reserved request for the DESTROY message */
struct fuse_req *destroy_req;
+
+ /** Version counter for attribute changes */
+ u64 attr_version;
};
static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
* Get a filled in inode
*/
struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
- int generation, struct fuse_attr *attr);
+ int generation, struct fuse_attr *attr,
+ u64 attr_valid, u64 attr_version);
/**
* Send FORGET command
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg);
-/** */
-struct fuse_req *fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags,
- int opcode);
+/** Fill in ff->reserved_req with a RELEASE request */
+void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode);
+
/**
* Send RELEASE or RELEASEDIR request
*/
/**
* Change attributes of an inode
*/
-void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr);
+void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
+ u64 attr_valid, u64 attr_version);
/**
* Initialize the client device
/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc);
-/**
- * Get the attributes of a file
- */
-int fuse_do_getattr(struct inode *inode);
-
/**
* Invalidate inode attributes
*/
* Is file type valid?
*/
int fuse_valid_type(int m);
+
+/**
+ * Is task allowed to perform filesystem operation?
+ */
+int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task);
+
+u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id);
+
+int fuse_update_attributes(struct inode *inode, struct kstat *stat,
+ struct file *file, bool *refreshed);