fs/fuse/fuse_i.h

3   Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
23 #include <linux/backing-dev.h>
38 /** Bias for fi->writectr, meaning new writepages must not be sent */
46 #define FUSE_NAME_MAX (PATH_MAX - 1)
130 	/** The sticky bit in inode->i_mode may have been removed, so
146 			/* Files usable in writepage.  Protected by fi->lock */
162 			/* waitq for direct-io completion */
277 	/** RB node to be linked on fuse_conn->polled_files */
283 	/** Does file hold a fi->iocachectr refcount? */
401  * FR_URING:		request is handled through fuse-io-uring
423  *   - FR_ABORTED
424  *   - FR_LOCKED (may also be modified under fc->lock, tested under both)
457 	/** virtio-fs's physically contiguous buffer for in and out args */
477  * Input queue signalling is device-specific.  For example, the /dev/fuse file
478  * uses fiq->waitq and fasync to wake processes that are waiting on queue
486 	void (*send_forget)(struct fuse_iqueue *fiq, struct fuse_forget_link *link);
491 	void (*send_interrupt)(struct fuse_iqueue *fiq, struct fuse_req *req);
496 	void (*send_req)(struct fuse_iqueue *fiq, struct fuse_req *req);
501 	void (*release)(struct fuse_iqueue *fiq);
536 	/** Device-specific callbacks */
539 	/** Device-specific state */
570 	/** list entry on fc->devices */
576 	FUSE_DAX_ALWAYS,	/* "-o dax=always" */
577 	FUSE_DAX_NEVER,		/* "-o dax=never" */
578 	FUSE_DAX_INODE_USER,	/* "-o dax=inode" */
662 	/** Constrain ->max_pages to this value during feature negotiation */
732 	/** write-back cache policy (default is write-through) */
808 	/** Do multi-page cached writes */
835 	/** Does the filesystem support asynchronous direct-IO submission? */
844 	/** Check permissions based on the file mode or not? */
865 	/* Auto-mount submounts announced by the server */
950 	/* Dax specific conn data, non-NULL if DAX is enabled */
992 	 * Super block for this connection (fc->killsb must be held when
997 	/* Entry on fc->mounts */
1004  * Used as a placeholder in args->in_args[0] for consistency
1011 	args->in_args[0].size = sizeof(struct fuse_zero_header);  in fuse_set_zero_arg0()
1012 	args->in_args[0].value = NULL;  in fuse_set_zero_arg0()
1017 	return sb->s_fs_info;  in get_fuse_mount_super()
1022 	return get_fuse_mount_super(sb)->fc;  in get_fuse_conn_super()
1027 	return get_fuse_mount_super(inode->i_sb);  in get_fuse_mount()
1032 	return get_fuse_mount_super(inode->i_sb)->fc;  in get_fuse_conn()
1042 	return get_fuse_inode(inode)->nodeid;  in get_node_id()
1052 	return atomic64_read(&fc->attr_version);  in fuse_get_attr_version()
1057 	return atomic64_read(&fc->evict_ctr);  in fuse_get_evict_ctr()
1063 	return inode->i_generation != generation ||  in fuse_stale_inode()
1064 		inode_wrong_type(inode, attr->mode);  in fuse_stale_inode()
1069 	set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state);  in fuse_make_bad()
1074 	return unlikely(test_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state));  in fuse_is_bad()
1096 		descs[i].length = PAGE_SIZE - descs[i].offset;  in fuse_folio_descs_length_init()
1103 	if (atomic_dec_and_test(&bucket->count))  in fuse_sync_bucket_dec()
1104 		wake_up(&bucket->waitq);  in fuse_sync_bucket_dec()
1281 	fuse_time_to_jiffies((o)->attr_valid, (o)->attr_valid_nsec)
1315  * @sb: partially-initialized superblock to fill in
1379  * The caller must hold fc->killsb.
1385  * File-system tells the kernel to invalidate cache for the given node id.
1391  * File-system tells the kernel to invalidate parent attributes and
1394  * If the child_nodeid is non-zero and:
1395  *    - matches the inode number for the dentry matching parent/name,
1396  *    - is not a mount point
1397  *    - is a file or oan empty directory
1410 /** If set, it is WRITE; otherwise - READ */
1413 /** CUSE pass fuse_direct_io() a file which f_mapping->host is not from FUSE */
1464 u64 fuse_get_unique(struct fuse_iqueue *fiq);
1512 	return READ_ONCE(fi->fb);  in fuse_inode_backing()
1522 	return xchg(&fi->fb, fb);  in fuse_inode_backing_set()
1556 	return ff->passthrough;  in fuse_file_passthrough()