Lines Matching +full:data +full:- +full:mapping

1 /* SPDX-License-Identifier: GPL-2.0 */
31 #define IOMAP_INLINE	4	/* data inline in the inode */
37  * zeroing for areas that no data is copied to.
40  * written data and requires fdatasync to commit them to persistent storage.
51  * buffer heads for this mapping.
77 #define IOMAP_NULL_ADDR -1ULL	/* addr is not valid */
82 	u64			addr; /* disk offset of mapping, bytes */
83 	loff_t			offset;	/* file offset of mapping, bytes */
84 	u64			length;	/* length of mapping, bytes */
85 	u16			type;	/* type of mapping */
86 	u16			flags;	/* flags for mapping */
96 	return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT;  in iomap_sector()
100  * Returns the inline data pointer for logical offset @pos.
104 	return iomap->inline_data + pos - iomap->offset;  in iomap_inline_data()
108  * Check if the mapping's length is within the valid range for inline data.
109  * This is used to guard against accessing data beyond the page inline_data
114 	return iomap->length <= PAGE_SIZE - offset_in_page(iomap->inline_data);  in iomap_inline_data_valid()
118  * When a filesystem sets page_ops in an iomap mapping it returns, page_prepare
139 #define IOMAP_FAULT		(1 << 3) /* mapping for page fault */
147 	 * Return the existing mapping at pos, or reserve space starting at
148 	 * pos for up to length, as long as we can do it as a single mapping.
149 	 * The actual length is returned in iomap->length.
159 	 * Written might be zero if no data was written.
166  * struct iomap_iter - Iterate through a range of a file
169  *	calls to iomap_iter().  Treat as read-only in the body.
191  * iomap_length - length of the current iomap iteration
198 	u64 end = iter->iomap.offset + iter->iomap.length;  in iomap_length()
200 	if (iter->srcmap.type != IOMAP_HOLE)  in iomap_length()
201 		end = min(end, iter->srcmap.offset + iter->srcmap.length);  in iomap_length()
202 	return min(iter->len, end - iter->pos);  in iomap_length()
206  * iomap_iter_srcmap - return the source map for the current iomap iteration
212  * map in &i->iomap.
216 	if (i->srcmap.type != IOMAP_HOLE)  in iomap_iter_srcmap()
217 		return &i->srcmap;  in iomap_iter_srcmap()
218 	return &i->iomap;  in iomap_iter_srcmap()
231 int iomap_migrate_page(struct address_space *mapping, struct page *newpage,
250 sector_t iomap_bmap(struct address_space *mapping, sector_t bno,
303 int iomap_writepages(struct address_space *mapping,
308  * Flags for direct I/O ->end_io:
328  * the caller by returning -EAGAIN.  Used to optimize direct I/O writes that
350 # define iomap_swapfile_activate(sis, swapfile, pagespan, ops)	(-EIO)