提交 de497688 编写于 作者: D Dave Chinner 提交者: Ben Myers

xfs: make growfs initialise the AGFL header

For verification purposes, AGFLs need to be initialised to a known
set of values. For upcoming CRC changes, they are also headers that
need to be initialised. Currently, growfs does neither for the AGFLs
- it ignores them completely. Add initialisation of the AGFL to be
full of invalid block numbers (NULLAGBLOCK) to put the
infrastructure in place needed for CRC support.

Includes a comment clarification from Jeff Liu.
Signed-off-by: NDave Chinner <dchinner@redhat.com>
Reviewed-by Rich Johnston <rjohnston@sgi.com>
Signed-off-by: NBen Myers <bpm@sgi.com>
上级 fd23683c
......@@ -140,6 +140,7 @@ xfs_growfs_data_private(
xfs_growfs_data_t *in) /* growfs data input struct */
{
xfs_agf_t *agf;
struct xfs_agfl *agfl;
xfs_agi_t *agi;
xfs_agnumber_t agno;
xfs_extlen_t agsize;
......@@ -207,7 +208,7 @@ xfs_growfs_data_private(
nfree = 0;
for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
/*
* AG freelist header block
* AG freespace header block
*/
bp = xfs_growfs_get_hdr_buf(mp,
XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
......@@ -243,6 +244,26 @@ xfs_growfs_data_private(
if (error)
goto error0;
/*
* AG freelist header block
*/
bp = xfs_growfs_get_hdr_buf(mp,
XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
XFS_FSS_TO_BB(mp, 1), 0);
if (!bp) {
error = ENOMEM;
goto error0;
}
agfl = XFS_BUF_TO_AGFL(bp);
for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
if (error)
goto error0;
/*
* AG inode header block
*/
......
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