diff options
Diffstat (limited to 'fs/fuse/fuse_i.h')
| -rw-r--r-- | fs/fuse/fuse_i.h | 115 |
1 files changed, 100 insertions, 15 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 771fb6322c07..fde7249a3a96 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -44,6 +44,9 @@ doing the mount will be allowed to access the filesystem */ #define FUSE_ALLOW_OTHER (1 << 1) +/** Number of page pointers embedded in fuse_req */ +#define FUSE_REQ_INLINE_PAGES 1 + /** List of active connections */ extern struct list_head fuse_conn_list; @@ -103,6 +106,15 @@ struct fuse_inode { /** List of writepage requestst (pending or sent) */ struct list_head writepages; + + /** Miscellaneous bits describing inode state */ + unsigned long state; +}; + +/** FUSE inode state bits */ +enum { + /** Advise readdirplus */ + FUSE_I_ADVISE_RDPLUS, }; struct fuse_conn; @@ -200,6 +212,12 @@ struct fuse_out { struct fuse_arg args[3]; }; +/** FUSE page descriptor */ +struct fuse_page_desc { + unsigned int length; + unsigned int offset; +}; + /** The request state */ enum fuse_req_state { FUSE_REQ_INIT = 0, @@ -210,6 +228,20 @@ enum fuse_req_state { FUSE_REQ_FINISHED }; +/** The request IO state (for asynchronous processing) */ +struct fuse_io_priv { + int async; + spinlock_t lock; + unsigned reqs; + ssize_t bytes; + size_t size; + __u64 offset; + bool write; + int err; + struct kiocb *iocb; + struct file *file; +}; + /** * A request to the client */ @@ -291,20 +323,32 @@ struct fuse_req { } misc; /** page vector */ - struct page *pages[FUSE_MAX_PAGES_PER_REQ]; + struct page **pages; + + /** page-descriptor vector */ + struct fuse_page_desc *page_descs; + + /** size of the 'pages' array */ + unsigned max_pages; + + /** inline page vector */ + struct page *inline_pages[FUSE_REQ_INLINE_PAGES]; + + /** inline page-descriptor vector */ + struct fuse_page_desc inline_page_descs[FUSE_REQ_INLINE_PAGES]; /** number of pages in vector */ unsigned num_pages; - /** offset of data on first page */ - unsigned page_offset; - /** File used in the request (or NULL) */ struct fuse_file *ff; /** Inode used in the request or NULL */ struct inode *inode; + /** AIO control block */ + struct fuse_io_priv *io; + /** Link on fi->writepages */ struct list_head writepages_entry; @@ -333,10 +377,10 @@ struct fuse_conn { atomic_t count; /** The user id for this mount */ - uid_t user_id; + kuid_t user_id; /** The group id for this mount */ - gid_t group_id; + kgid_t group_id; /** The fuse mount flags for this mount */ unsigned flags; @@ -390,6 +434,10 @@ struct fuse_conn { /** Batching of FORGET requests (positive indicates FORGET batch) */ int forget_batch; + /** Flag indicating that INIT reply has been received. Allocating + * any fuse request will be suspended until the flag is set */ + int initialized; + /** Flag indicating if connection is blocked. This will be the case before the INIT reply is received, and if there are too many outstading backgrounds requests */ @@ -484,6 +532,18 @@ struct fuse_conn { /** Is fallocate not implemented by fs? */ unsigned no_fallocate:1; + /** Use enhanced/automatic page cache invalidation. */ + unsigned auto_inval_data:1; + + /** Does the filesystem support readdirplus? */ + unsigned do_readdirplus:1; + + /** Does the filesystem want adaptive readdirplus? */ + unsigned readdirplus_auto:1; + + /** Does the filesystem support asynchronous direct-IO submission? */ + unsigned async_dio:1; + /** The number of requests waiting for completion */ atomic_t num_waiting; @@ -575,6 +635,9 @@ void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, struct fuse_forget_link *fuse_alloc_forget(void); +/* Used by READDIRPLUS */ +void fuse_force_forget(struct file *file, u64 nodeid); + /** * Initialize READ or READDIR request */ @@ -655,9 +718,9 @@ void fuse_ctl_cleanup(void); /** * Allocate a request */ -struct fuse_req *fuse_request_alloc(void); +struct fuse_req *fuse_request_alloc(unsigned npages); -struct fuse_req *fuse_request_alloc_nofs(void); +struct fuse_req *fuse_request_alloc_nofs(unsigned npages); /** * Free a request @@ -665,14 +728,32 @@ struct fuse_req *fuse_request_alloc_nofs(void); void fuse_request_free(struct fuse_req *req); /** - * Get a request, may fail with -ENOMEM + * Get a request, may fail with -ENOMEM, + * caller should specify # elements in req->pages[] explicitly */ -struct fuse_req *fuse_get_req(struct fuse_conn *fc); +struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages); +struct fuse_req *fuse_get_req_for_background(struct fuse_conn *fc, + unsigned npages); + +/* + * Increment reference count on request + */ +void __fuse_get_request(struct fuse_req *req); + +/** + * Get a request, may fail with -ENOMEM, + * useful for callers who doesn't use req->pages[] + */ +static inline struct fuse_req *fuse_get_req_nopages(struct fuse_conn *fc) +{ + return fuse_get_req(fc, 0); +} /** * Gets a requests for a file operation, always succeeds */ -struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file); +struct fuse_req *fuse_get_req_nofail_nopages(struct fuse_conn *fc, + struct file *file); /** * Decrement reference count of a request. If count goes to zero free @@ -736,9 +817,9 @@ void fuse_ctl_remove_conn(struct fuse_conn *fc); int fuse_valid_type(int m); /** - * Is task allowed to perform filesystem operation? + * Is current process allowed to perform filesystem operation? */ -int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); +int fuse_allow_current_process(struct fuse_conn *fc); u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); @@ -773,8 +854,9 @@ int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, 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); +ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov, + unsigned long nr_segs, size_t count, loff_t *ppos, + int write); long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, unsigned int flags); long fuse_ioctl_common(struct file *file, unsigned int cmd, @@ -784,4 +866,7 @@ int fuse_dev_release(struct inode *inode, struct file *file); void fuse_write_update_size(struct inode *inode, loff_t pos); +int fuse_do_setattr(struct inode *inode, struct iattr *attr, + struct file *file); + #endif /* _FS_FUSE_I_H */ |