iomap: add IOMAP_REPORT
This allows the file system to tell a FIEMAP from a read operation, and thus avoids the need to report flags that aren't actually used in the read path. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:

committed by
Dave Chinner

parent
5faaf4fa0a
commit
d33fd776f9
@@ -19,11 +19,15 @@ struct vm_fault;
|
||||
#define IOMAP_UNWRITTEN 0x04 /* blocks allocated @blkno in unwritten state */
|
||||
|
||||
/*
|
||||
* Flags for iomap mappings:
|
||||
* Flags for all iomap mappings:
|
||||
*/
|
||||
#define IOMAP_F_MERGED 0x01 /* contains multiple blocks/extents */
|
||||
#define IOMAP_F_SHARED 0x02 /* block shared with another file */
|
||||
#define IOMAP_F_NEW 0x04 /* blocks have been newly allocated */
|
||||
#define IOMAP_F_NEW 0x01 /* blocks have been newly allocated */
|
||||
|
||||
/*
|
||||
* Flags that only need to be reported for IOMAP_REPORT requests:
|
||||
*/
|
||||
#define IOMAP_F_MERGED 0x10 /* contains multiple blocks/extents */
|
||||
#define IOMAP_F_SHARED 0x20 /* block shared with another file */
|
||||
|
||||
/*
|
||||
* Magic value for blkno:
|
||||
@@ -42,8 +46,9 @@ struct iomap {
|
||||
/*
|
||||
* Flags for iomap_begin / iomap_end. No flag implies a read.
|
||||
*/
|
||||
#define IOMAP_WRITE (1 << 0)
|
||||
#define IOMAP_ZERO (1 << 1)
|
||||
#define IOMAP_WRITE (1 << 0) /* writing, must allocate blocks */
|
||||
#define IOMAP_ZERO (1 << 1) /* zeroing operation, may skip holes */
|
||||
#define IOMAP_REPORT (1 << 2) /* report extent status, e.g. FIEMAP */
|
||||
|
||||
struct iomap_ops {
|
||||
/*
|
||||
|
Reference in New Issue
Block a user