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iomap: Switch from blkno to disk offset

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Replace iomap->blkno, the sector number, with iomap->addr, the disk
offset in bytes.  For invalid disk offsets, use the special value
IOMAP_NULL_ADDR instead of IOMAP_NULL_BLOCK.

This allows to use iomap for mappings which are not block aligned, such
as inline data on ext4.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>  # iomap, xfs
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Andreas Gruenbacher
2017-10-01 17:55:54 -04:00
committed by Theodore Ts'o
parent 9e66317d3c
commit 19fe5f643f
8 changed files with 22 additions and 23 deletions
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4
fs/nfsd/blocklayout.c
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@@ -65,7 +65,7 @@ nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp,
bex->es = PNFS_BLOCK_READ_DATA;
else
bex->es = PNFS_BLOCK_READWRITE_DATA;
bex->soff = (iomap.blkno << 9);
bex->soff = iomap.addr;
break;
case IOMAP_UNWRITTEN:
if (seg->iomode & IOMODE_RW) {
@@ -78,7 +78,7 @@ nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp,
}
bex->es = PNFS_BLOCK_INVALID_DATA;
bex->soff = (iomap.blkno << 9);
bex->soff = iomap.addr;
break;
}
/*FALLTHRU*/