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xfs: factor the ag length extension code into libxfs 

Growfs currently manually codes the extension of the last AG in a
filesytem during the growfs process. Factor that out of the growfs
code and move it into libxfs along with teh rest of the AG header
modification code.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Dave Chinner 2018-05-13 23:10:08 -07:00 committed by Darrick J. Wong
parent b16817b66b
commit 49dd56f26e
3 changed files with 68 additions and 57 deletions
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60
fs/xfs/libxfs/xfs_ag.c
View File

@ -16,6 +16,7 @@
#include "xfs_alloc_btree.h"
#include "xfs_rmap_btree.h"
#include "xfs_alloc.h"
#include "xfs_ialloc.h"
#include "xfs_rmap.h"
#include "xfs_ag.h"
@ -402,3 +403,62 @@ xfs_ag_init_headers(
}
return error;
}
/*
* Extent the AG indicated by the @id by the length passed in
*/
int
xfs_ag_extend_space(
struct xfs_mount *mp,
struct xfs_trans *tp,
struct aghdr_init_data *id,
xfs_extlen_t len)
{
struct xfs_owner_info oinfo;
struct xfs_buf *bp;
struct xfs_agi *agi;
struct xfs_agf *agf;
int error;
/*
* Change the agi length.
*/
error = xfs_ialloc_read_agi(mp, tp, id->agno, &bp);
if (error)
return error;
agi = XFS_BUF_TO_AGI(bp);
be32_add_cpu(&agi->agi_length, len);
ASSERT(id->agno == mp->m_sb.sb_agcount - 1 ||
be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
/*
* Change agf length.
*/
error = xfs_alloc_read_agf(mp, tp, id->agno, 0, &bp);
if (error)
return error;
agf = XFS_BUF_TO_AGF(bp);
be32_add_cpu(&agf->agf_length, len);
ASSERT(agf->agf_length == agi->agi_length);
xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
/*
* Free the new space.
*
* XFS_RMAP_OWN_NULL is used here to tell the rmap btree that
* this doesn't actually exist in the rmap btree.
*/
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_NULL);
error = xfs_rmap_free(tp, bp, id->agno,
be32_to_cpu(agf->agf_length) - len,
len, &oinfo);
if (error)
return error;
return xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, id->agno,
be32_to_cpu(agf->agf_length) - len),
len, &oinfo, XFS_AG_RESV_NONE);
}

7
fs/xfs/libxfs/xfs_ag.h
View File

@ -7,6 +7,9 @@
#ifndef __LIBXFS_AG_H
#define __LIBXFS_AG_H 1
struct xfs_mount;
struct xfs_trans;
struct aghdr_init_data {
/* per ag data */
xfs_agblock_t agno; /* ag to init */
@ -20,6 +23,8 @@ struct aghdr_init_data {
xfs_btnum_t type; /* type of btree root block */
};
int xfs_ag_init_headers( struct xfs_mount *mp, struct aghdr_init_data *id);
int xfs_ag_init_headers(struct xfs_mount *mp, struct aghdr_init_data *id);
int xfs_ag_extend_space(struct xfs_mount *mp, struct xfs_trans *tp,
struct aghdr_init_data *id, xfs_extlen_t len);
#endif /* __LIBXFS_AG_H */

58
fs/xfs/xfs_fsops.c
View File

@ -27,16 +27,12 @@
#include "xfs_trans.h"
#include "xfs_error.h"
#include "xfs_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_rmap_btree.h"
#include "xfs_ialloc.h"
#include "xfs_fsops.h"
#include "xfs_trans_space.h"
#include "xfs_rtalloc.h"
#include "xfs_trace.h"
#include "xfs_log.h"
#include "xfs_rmap.h"
#include "xfs_ag.h"
#include "xfs_ag_resv.h"
@ -48,8 +44,6 @@ xfs_growfs_data_private(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_growfs_data_t *in) /* growfs data input struct */
{
xfs_agf_t *agf;
xfs_agi_t *agi;
xfs_buf_t *bp;
int error;
xfs_agnumber_t nagcount;
@ -132,57 +126,9 @@ xfs_growfs_data_private(
xfs_trans_agblocks_delta(tp, id.nfree);
/*
* There are new blocks in the old last a.g.
*/
/* If there are new blocks in the old last AG, extend it. */
if (new) {
struct xfs_owner_info oinfo;
/*
* Change the agi length.
*/
error = xfs_ialloc_read_agi(mp, tp, id.agno, &bp);
if (error)
goto out_trans_cancel;
ASSERT(bp);
agi = XFS_BUF_TO_AGI(bp);
be32_add_cpu(&agi->agi_length, new);
ASSERT(nagcount == oagcount ||
be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
/*
* Change agf length.
*/
error = xfs_alloc_read_agf(mp, tp, id.agno, 0, &bp);
if (error)
goto out_trans_cancel;
ASSERT(bp);
agf = XFS_BUF_TO_AGF(bp);
be32_add_cpu(&agf->agf_length, new);
ASSERT(be32_to_cpu(agf->agf_length) ==
be32_to_cpu(agi->agi_length));
xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
/*
* Free the new space.
*
* XFS_RMAP_OWN_NULL is used here to tell the rmap btree that
* this doesn't actually exist in the rmap btree.
*/
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_NULL);
error = xfs_rmap_free(tp, bp, id.agno,
be32_to_cpu(agf->agf_length) - new,
new, &oinfo);
if (error)
goto out_trans_cancel;
error = xfs_free_extent(tp,
XFS_AGB_TO_FSB(mp, id.agno,
be32_to_cpu(agf->agf_length) - new),
new, &oinfo, XFS_AG_RESV_NONE);
error = xfs_ag_extend_space(mp, tp, &id, new);
if (error)
goto out_trans_cancel;
}