--- /dev/null
+/*
+ FUSE: Filesystem in Userspace
+ 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/wait.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/backing-dev.h>
+#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/rbtree.h>
+#include <linux/poll.h>
+#include <linux/workqueue.h>
+
+/** Max number of pages that can be used in a single read request */
+#define FUSE_MAX_PAGES_PER_REQ 32
+
+/** Bias for fi->writectr, meaning new writepages must not be sent */
+#define FUSE_NOWRITE INT_MIN
+
+/** It could be as large as PATH_MAX, but would that have any uses? */
+#define FUSE_NAME_MAX 1024
+
+/** Number of dentries for each connection in the control filesystem */
+#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
+ 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)
+
+/** 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;
+
+/** 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;
+
+/* One forget request */
+struct fuse_forget_link {
+ struct fuse_forget_one forget_one;
+ struct fuse_forget_link *next;
+};
+
+/** FUSE inode */
+struct fuse_inode {
+ /** Inode data */
+ struct inode inode;
+
+ /** Unique ID, which identifies the inode between userspace
+ * and kernel */
+ u64 nodeid;
+
+ /** Number of lookups on this inode */
+ u64 nlookup;
+
+ /** The request used for sending the FORGET message */
+ struct fuse_forget_link *forget;
+
+ /** 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 */
+ umode_t orig_i_mode;
+
+ /** 64 bit inode number */
+ u64 orig_ino;
+
+ /** Version of last attribute change */
+ u64 attr_version;
+
+ /** Files usable in writepage. Protected by fc->lock */
+ struct list_head write_files;
+
+ /** Writepages pending on truncate or fsync */
+ struct list_head queued_writes;
+
+ /** Number of sent writes, a negative bias (FUSE_NOWRITE)
+ * means more writes are blocked */
+ int writectr;
+
+ /** Waitq for writepage completion */
+ wait_queue_head_t page_waitq;
+
+ /** 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,
+ /** Initialized with readdirplus */
+ FUSE_I_INIT_RDPLUS,
+ /** An operation changing file size is in progress */
+ FUSE_I_SIZE_UNSTABLE,
+};
+
+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;
+
+ /** Has flock been performed on this file? */
+ bool flock:1;
+};
+
+/** One input argument of a request */
+struct fuse_in_arg {
+ unsigned size;
+ const void *value;
+};
+
+/** The request input */
+struct fuse_in {
+ /** The request header */
+ struct fuse_in_header h;
+
+ /** True if the data for the last argument is in req->pages */
+ unsigned argpages:1;
+
+ /** Number of arguments */
+ unsigned numargs;
+
+ /** Array of arguments */
+ struct fuse_in_arg args[3];
+};
+
+/** One output argument of a request */
+struct fuse_arg {
+ unsigned size;
+ void *value;
+};
+
+/** The request output */
+struct fuse_out {
+ /** Header returned from userspace */
+ struct fuse_out_header h;
+
+ /*
+ * The following bitfields are not changed during the request
+ * processing
+ */
+
+ /** Last argument is variable length (can be shorter than
+ arg->size) */
+ unsigned argvar:1;
+
+ /** Last argument is a list of pages to copy data to */
+ unsigned argpages:1;
+
+ /** Zero partially or not copied pages */
+ unsigned page_zeroing:1;
+
+ /** Pages may be replaced with new ones */
+ unsigned page_replace:1;
+
+ /** Number or arguments */
+ unsigned numargs;
+
+ /** Array of arguments */
+ struct fuse_arg args[2];
+};
+
+/** FUSE page descriptor */
+struct fuse_page_desc {
+ unsigned int length;
+ unsigned int offset;
+};
+
+struct fuse_args {
+ struct {
+ struct {
+ uint32_t opcode;
+ uint64_t nodeid;
+ } h;
+ unsigned numargs;
+ struct fuse_in_arg args[3];
+
+ } in;
+ struct {
+ unsigned argvar:1;
+ unsigned numargs;
+ struct fuse_arg args[2];
+ } out;
+};
+
+#define FUSE_ARGS(args) struct fuse_args args = {}
+
+/** The request state */
+enum fuse_req_state {
+ FUSE_REQ_INIT = 0,
+ FUSE_REQ_PENDING,
+ FUSE_REQ_READING,
+ FUSE_REQ_SENT,
+ FUSE_REQ_WRITING,
+ 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;
+ struct completion *done;
+};
+
+/**
+ * A request to the client
+ */
+struct fuse_req {
+ /** This can be on either pending processing or io lists in
+ fuse_conn */
+ struct list_head list;
+
+ /** Entry on the interrupts list */
+ struct list_head intr_entry;
+
+ /** refcount */
+ atomic_t count;
+
+ /** Unique ID for the interrupt request */
+ u64 intr_unique;
+
+ /*
+ * The following bitfields are either set once before the
+ * request is queued or setting/clearing them is protected by
+ * fuse_conn->lock
+ */
+
+ /** True if the request has reply */
+ unsigned isreply:1;
+
+ /** Force sending of the request even if interrupted */
+ unsigned force:1;
+
+ /** The request was aborted */
+ unsigned aborted:1;
+
+ /** Request is sent in the background */
+ unsigned background:1;
+
+ /** The request has been interrupted */
+ unsigned interrupted:1;
+
+ /** Data is being copied to/from the request */
+ unsigned locked:1;
+
+ /** Request is counted as "waiting" */
+ unsigned waiting:1;
+
+ /** State of the request */
+ enum fuse_req_state state;
+
+ /** The request input */
+ struct fuse_in in;
+
+ /** The request output */
+ struct fuse_out out;
+
+ /** Used to wake up the task waiting for completion of request*/
+ wait_queue_head_t waitq;
+
+ /** Data for asynchronous requests */
+ union {
+ struct {
+ struct fuse_release_in in;
+ struct inode *inode;
+ } release;
+ struct fuse_init_in init_in;
+ struct fuse_init_out init_out;
+ struct cuse_init_in cuse_init_in;
+ struct {
+ struct fuse_read_in in;
+ u64 attr_ver;
+ } read;
+ struct {
+ struct fuse_write_in in;
+ struct fuse_write_out out;
+ struct fuse_req *next;
+ } write;
+ struct fuse_notify_retrieve_in retrieve_in;
+ } misc;
+
+ /** page vector */
+ 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;
+
+ /** 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;
+
+ /** Request completion callback */
+ void (*end)(struct fuse_conn *, struct fuse_req *);
+
+ /** Request is stolen from fuse_file->reserved_req */
+ struct file *stolen_file;
+};
+
+/**
+ * A Fuse connection.
+ *
+ * This structure is created, when the filesystem is mounted, and is
+ * destroyed, when the client device is closed and the filesystem is
+ * unmounted.
+ */
+struct fuse_conn {
+ /** Lock protecting accessess to members of this structure */
+ spinlock_t lock;
+
+ /** Refcount */
+ atomic_t count;
+
+ struct rcu_head rcu;
+
+ /** The user id for this mount */
+ kuid_t user_id;
+
+ /** The group id for this mount */
+ kgid_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 pending requests */
+ struct list_head pending;
+
+ /** The list of requests being processed */
+ struct list_head processing;
+
+ /** 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;
+
+ /** Number of background requests currently queued for userspace */
+ unsigned active_background;
+
+ /** The list of background requests set aside for later queuing */
+ struct list_head bg_queue;
+
+ /** Pending interrupts */
+ struct list_head interrupts;
+
+ /** Queue of pending forgets */
+ struct fuse_forget_link forget_list_head;
+ struct fuse_forget_link *forget_list_tail;
+
+ /** 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 */
+ int blocked;
+
+ /** 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;
+
+ /** Connection established, cleared on umount, connection
+ abort and device release */
+ unsigned connected;
+
+ /** 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;
+
+ /** Connection successful. Only set in INIT */
+ unsigned conn_init:1;
+
+ /** 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;
+
+ /** Filesystem supports NFS exporting. Only set in INIT */
+ unsigned export_support:1;
+
+ /** Set if bdi is valid */
+ unsigned bdi_initialized:1;
+
+ /** write-back cache policy (default is write-through) */
+ unsigned writeback_cache:1;
+
+ /*
+ * The following bitfields are only for optimization purposes
+ * and hence races in setting them will not cause malfunction
+ */
+
+ /** Is open/release not implemented by fs? */
+ unsigned no_open: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;
+
+ /** Are posix file locking primitives not implemented by fs? */
+ unsigned no_lock:1;
+
+ /** Is access not implemented by fs? */
+ unsigned no_access:1;
+
+ /** Is create not implemented by fs? */
+ unsigned no_create:1;
+
+ /** Is interrupt not implemented by fs? */
+ unsigned no_interrupt:1;
+
+ /** Is bmap not implemented by fs? */
+ 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;
+
+ /** Are BSD file locking primitives not implemented by fs? */
+ unsigned no_flock:1;
+
+ /** Is fallocate not implemented by fs? */
+ unsigned no_fallocate:1;
+
+ /** Is rename with flags implemented by fs? */
+ unsigned no_rename2:1;
+
+ /** 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;
+
+ /** Negotiated minor version */
+ unsigned minor;
+
+ /** Backing dev info */
+ struct backing_dev_info bdi;
+
+ /** Entry on the fuse_conn_list */
+ struct list_head entry;
+
+ /** Device ID from super block */
+ dev_t dev;
+
+ /** Dentries in the control filesystem */
+ struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES];
+
+ /** number of dentries used in the above array */
+ int ctl_ndents;
+
+ /** O_ASYNC requests */
+ struct fasync_struct *fasync;
+
+ /** Key for lock owner ID scrambling */
+ u32 scramble_key[4];
+
+ /** Reserved request for the DESTROY message */
+ struct fuse_req *destroy_req;
+
+ /** 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)
+{
+ return sb->s_fs_info;
+}
+
+static inline struct fuse_conn *get_fuse_conn(struct inode *inode)
+{
+ return get_fuse_conn_super(inode->i_sb);
+}
+
+static inline struct fuse_inode *get_fuse_inode(struct inode *inode)
+{
+ return container_of(inode, struct fuse_inode, inode);
+}
+
+static inline u64 get_node_id(struct inode *inode)
+{
+ return get_fuse_inode(inode)->nodeid;
+}
+
+/** 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, 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_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,
+ u64 nodeid, u64 nlookup);
+
+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
+ */
+void fuse_read_fill(struct fuse_req *req, struct file *file,
+ loff_t pos, size_t count, int opcode);
+
+/**
+ * Send OPEN or OPENDIR request
+ */
+int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
+
+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);
+
+void fuse_sync_release(struct fuse_file *ff, int flags);
+
+/**
+ * Send RELEASE or RELEASEDIR request
+ */
+void fuse_release_common(struct file *file, int opcode);
+
+/**
+ * Send FSYNC or FSYNCDIR request
+ */
+int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
+ int datasync, 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);
+
+/**
+ * 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,
+ u64 attr_valid, u64 attr_version);
+
+void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
+ u64 attr_valid);
+
+/**
+ * Initialize the client device
+ */
+int fuse_dev_init(void);
+
+/**
+ * Cleanup the client device
+ */
+void fuse_dev_cleanup(void);
+
+int fuse_ctl_init(void);
+void __exit fuse_ctl_cleanup(void);
+
+/**
+ * Allocate a request
+ */
+struct fuse_req *fuse_request_alloc(unsigned npages);
+
+struct fuse_req *fuse_request_alloc_nofs(unsigned npages);
+
+/**
+ * Free a request
+ */
+void fuse_request_free(struct fuse_req *req);
+
+/**
+ * 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, 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);
+
+/**
+ * Gets a requests for a file operation, always succeeds
+ */
+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
+ * the request.
+ */
+void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req);
+
+/**
+ * Send a request (synchronous)
+ */
+void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req);
+
+/**
+ * Simple request sending that does request allocation and freeing
+ */
+ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args);
+
+/**
+ * Send a request in the background
+ */
+void fuse_request_send_background(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);
+
+/**
+ * Invalidate inode attributes
+ */
+void fuse_invalidate_attr(struct inode *inode);
+
+void fuse_invalidate_entry_cache(struct dentry *entry);
+
+void fuse_invalidate_atime(struct inode *inode);
+
+/**
+ * Acquire reference to fuse_conn
+ */
+struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
+
+/**
+ * Initialize fuse_conn
+ */
+void fuse_conn_init(struct fuse_conn *fc);
+
+/**
+ * Release reference to fuse_conn
+ */
+void fuse_conn_put(struct fuse_conn *fc);
+
+/**
+ * Add connection to control filesystem
+ */
+int fuse_ctl_add_conn(struct fuse_conn *fc);
+
+/**
+ * Remove connection from control filesystem
+ */
+void fuse_ctl_remove_conn(struct fuse_conn *fc);
+
+/**
+ * Is file type valid?
+ */
+int fuse_valid_type(int m);
+
+/**
+ * Is current process allowed to perform filesystem operation?
+ */
+int fuse_allow_current_process(struct fuse_conn *fc);
+
+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);
+
+void fuse_flush_writepages(struct inode *inode);
+
+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.
+ *
+ * If the child_nodeid is non-zero and:
+ * - matches the inode number for the dentry matching parent/name,
+ * - is not a mount point
+ * - is a file or oan empty directory
+ * then the dentry is unhashed (d_delete()).
+ */
+int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
+ u64 child_nodeid, struct qstr *name);
+
+int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
+ bool isdir);
+
+/**
+ * fuse_direct_io() flags
+ */
+
+/** If set, it is WRITE; otherwise - READ */
+#define FUSE_DIO_WRITE (1 << 0)
+
+/** CUSE pass fuse_direct_io() a file which f_mapping->host is not from FUSE */
+#define FUSE_DIO_CUSE (1 << 1)
+
+ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter,
+ loff_t *ppos, int flags);
+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,
+ 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);
+
+bool fuse_write_update_size(struct inode *inode, loff_t pos);
+
+int fuse_flush_times(struct inode *inode, struct fuse_file *ff);
+int fuse_write_inode(struct inode *inode, struct writeback_control *wbc);
+
+int fuse_do_setattr(struct inode *inode, struct iattr *attr,
+ struct file *file);
+
+void fuse_set_initialized(struct fuse_conn *fc);
+
+#endif /* _FS_FUSE_I_H */
Code Review / kvmfornfv.git / blobdiff