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-rw-r--r--ANDROID_3.4.5/fs/fuse/fuse_i.h784
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diff --git a/ANDROID_3.4.5/fs/fuse/fuse_i.h b/ANDROID_3.4.5/fs/fuse/fuse_i.h
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index d1819269..00000000
--- a/ANDROID_3.4.5/fs/fuse/fuse_i.h
+++ /dev/null
@@ -1,784 +0,0 @@
-/*
- 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)
-
-/** 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;
-};
-
-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[3];
-};
-
-/** 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
-};
-
-/**
- * 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 {
- union {
- struct fuse_release_in in;
- struct work_struct work;
- };
- struct path path;
- } 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;
- } write;
- struct fuse_notify_retrieve_in retrieve_in;
- struct fuse_lk_in lk_in;
- } misc;
-
- /** page vector */
- struct page *pages[FUSE_MAX_PAGES_PER_REQ];
-
- /** 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;
-
- /** 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;
-
- /** Mutex protecting against directory alias creation */
- struct mutex inst_mutex;
-
- /** Refcount */
- atomic_t count;
-
- /** The user id for this mount */
- uid_t user_id;
-
- /** The group id for this mount */
- gid_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 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;
-
- /*
- * The following bitfields are only for optimization purposes
- * and hence races in setting them will not cause malfunction
- */
-
- /** 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;
-
- /** 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);
-
-/**
- * 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 fuse_ctl_cleanup(void);
-
-/**
- * Allocate a request
- */
-struct fuse_req *fuse_request_alloc(void);
-
-struct fuse_req *fuse_request_alloc_nofs(void);
-
-/**
- * Free a request
- */
-void fuse_request_free(struct fuse_req *req);
-
-/**
- * Get a request, may fail with -ENOMEM
- */
-struct fuse_req *fuse_get_req(struct fuse_conn *fc);
-
-/**
- * Gets a requests for a file operation, always succeeds
- */
-struct fuse_req *fuse_get_req_nofail(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);
-
-/**
- * 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);
-
-/**
- * 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_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 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);
-
-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);
-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);
-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);
-
-void fuse_write_update_size(struct inode *inode, loff_t pos);
-
-#endif /* _FS_FUSE_I_H */