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xfs: add metadata reservations for realtime rmap btrees

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Reserve some free blocks so that we will always have enough free blocks
in the data volume to handle expansion of the realtime rmap btree.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-11-20 16:20:28 -08:00
parent 6b08901a6e
commit 8491a55cfc
3 changed files with 65 additions and 1 deletions
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41
fs/xfs/libxfs/xfs_rtrmap_btree.c
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@ -540,3 +540,44 @@ xfs_rtrmapbt_compute_maxlevels(
/* Add one level to handle the inode root level. */
mp->m_rtrmap_maxlevels = min(d_maxlevels, r_maxlevels) + 1;
}
/* Calculate the rtrmap btree size for some records. */
static unsigned long long
xfs_rtrmapbt_calc_size(
struct xfs_mount *mp,
unsigned long long len)
{
return xfs_btree_calc_size(mp->m_rtrmap_mnr, len);
}
/*
* Calculate the maximum rmap btree size.
*/
static unsigned long long
xfs_rtrmapbt_max_size(
struct xfs_mount *mp,
xfs_rtblock_t rtblocks)
{
/* Bail out if we're uninitialized, which can happen in mkfs. */
if (mp->m_rtrmap_mxr[0] == 0)
return 0;
return xfs_rtrmapbt_calc_size(mp, rtblocks);
}
/*
* Figure out how many blocks to reserve and how many are used by this btree.
*/
xfs_filblks_t
xfs_rtrmapbt_calc_reserves(
struct xfs_mount *mp)
{
uint32_t blocks = mp->m_groups[XG_TYPE_RTG].blocks;
if (!xfs_has_rtrmapbt(mp))
return 0;
/* Reserve 1% of the rtgroup or enough for 1 block per record. */
return max_t(xfs_filblks_t, blocks / 100,
xfs_rtrmapbt_max_size(mp, blocks));
}

2
fs/xfs/libxfs/xfs_rtrmap_btree.h
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@ -79,4 +79,6 @@ unsigned int xfs_rtrmapbt_maxlevels_ondisk(void);
int __init xfs_rtrmapbt_init_cur_cache(void);
void xfs_rtrmapbt_destroy_cur_cache(void);
xfs_filblks_t xfs_rtrmapbt_calc_reserves(struct xfs_mount *mp);
#endif /* __XFS_RTRMAP_BTREE_H__ */

23
fs/xfs/xfs_rtalloc.c
View File

@ -22,6 +22,7 @@
#include "xfs_rtalloc.h"
#include "xfs_sb.h"
#include "xfs_rtbitmap.h"
#include "xfs_rtrmap_btree.h"
#include "xfs_quota.h"
#include "xfs_log_priv.h"
#include "xfs_health.h"
@ -1498,6 +1499,13 @@ void
xfs_rt_resv_free(
struct xfs_mount *mp)
{
struct xfs_rtgroup *rtg = NULL;
unsigned int i;
while ((rtg = xfs_rtgroup_next(mp, rtg))) {
for (i = 0; i < XFS_RTGI_MAX; i++)
xfs_metafile_resv_free(rtg->rtg_inodes[i]);
}
}
/* Reserve space for rt metadata inodes' space expansion. */
@ -1505,7 +1513,20 @@ int
xfs_rt_resv_init(
struct xfs_mount *mp)
{
return 0;
struct xfs_rtgroup *rtg = NULL;
xfs_filblks_t ask;
int error = 0;
while ((rtg = xfs_rtgroup_next(mp, rtg))) {
int err2;
ask = xfs_rtrmapbt_calc_reserves(mp);
err2 = xfs_metafile_resv_init(rtg_rmap(rtg), ask);
if (err2 && !error)
error = err2;
}
return error;
}
/*