[PATCH 09/13] xfs: support RT inodes in xfs_mod_delalloc

Christoph Hellwig
2024-03-27T11:03:59Z

To prepare for re-enabling delalloc on RT devices, track the data blocks
(which use the RT device when the inode sits on it) and the indirect
blocks (which don't) separately to xfs_mod_delalloc, and add a new
percpu counter to also track the RT delalloc blocks.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/libxfs/xfs_bmap.c | 12 ++++++------
fs/xfs/scrub/fscounters.c | 6 +++++-
fs/xfs/scrub/fscounters.h | 1 +
fs/xfs/scrub/fscounters_repair.c | 3 ++-
fs/xfs/xfs_mount.c | 18 +++++++++++++++---
fs/xfs/xfs_mount.h | 9 ++++++++-
fs/xfs/xfs_super.c | 11 ++++++++++-
7 files changed, 47 insertions(+), 13 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index a9a23a5d2e487f..131d4f063b660a 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -1975,7 +1975,7 @@ xfs_bmap_add_extent_delay_real(
}

if (da_new != da_old)
- xfs_mod_delalloc(mp, (int64_t)da_new - da_old);
+ xfs_mod_delalloc(bma->ip, 0, (int64_t)da_new - da_old);

if (bma->cur) {
da_new += bma->cur->bc_bmap.allocated;
@@ -2694,7 +2694,7 @@ xfs_bmap_add_extent_hole_delay(
/*
* Nothing to do for disk quota accounting here.
*/
- xfs_mod_delalloc(ip->i_mount, (int64_t)newlen - oldlen);
+ xfs_mod_delalloc(ip, 0, (int64_t)newlen - oldlen);
}
}

@@ -3371,7 +3371,7 @@ xfs_bmap_alloc_account(
* yet.
*/
if (ap->wasdel) {
- xfs_mod_delalloc(ap->ip->i_mount, -(int64_t)ap->length);
+ xfs_mod_delalloc(ap->ip, -(int64_t)ap->length, 0);
return;
}

@@ -3395,7 +3395,7 @@ xfs_bmap_alloc_account(
xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
if (ap->wasdel) {
ap->ip->i_delayed_blks -= ap->length;
- xfs_mod_delalloc(ap->ip->i_mount, -(int64_t)ap->length);
+ xfs_mod_delalloc(ap->ip, -(int64_t)ap->length, 0);
fld = isrt ? XFS_TRANS_DQ_DELRTBCOUNT : XFS_TRANS_DQ_DELBCOUNT;
} else {
fld = isrt ? XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
@@ -4124,7 +4124,7 @@ xfs_bmapi_reserve_delalloc(
goto out_unreserve_frextents;

ip->i_delayed_blks += alen;
- xfs_mod_delalloc(ip->i_mount, alen + indlen);
+ xfs_mod_delalloc(ip, alen, indlen);

got->br_startoff = aoff;
got->br_startblock = nullstartblock(indlen);
@@ -5022,7 +5022,7 @@ xfs_bmap_del_extent_delay(
fdblocks += del->br_blockcount;

xfs_add_fdblocks(mp, fdblocks);
- xfs_mod_delalloc(mp, -(int64_t)fdblocks);
+ xfs_mod_delalloc(ip, -(int64_t)del->br_blockcount, -da_diff);
return error;
}

diff --git a/fs/xfs/scrub/fscounters.c b/fs/xfs/scrub/fscounters.c
index c910b5f1306913..d18a3cac30479d 100644
--- a/fs/xfs/scrub/fscounters.c
+++ b/fs/xfs/scrub/fscounters.c
@@ -412,6 +412,7 @@ xchk_fscount_count_frextents(
int error;

fsc->frextents = 0;
+ fsc->frextents_delayed = 0;
if (!xfs_has_realtime(mp))
return 0;

@@ -423,6 +424,8 @@ xchk_fscount_count_frextents(
goto out_unlock;
}

+ fsc->frextents_delayed = percpu_counter_sum(&mp->m_delalloc_rtextents);
+
out_unlock:
xfs_rtbitmap_unlock_shared(sc->mp, XFS_RBMLOCK_BITMAP);
return error;
@@ -434,6 +437,7 @@ xchk_fscount_count_frextents(
struct xchk_fscounters *fsc)
{
fsc->frextents = 0;
+ fsc->frextents_delayed = 0;
return 0;
}
#endif /* CONFIG_XFS_RT */
@@ -593,7 +597,7 @@ xchk_fscounters(
}

if (!xchk_fscount_within_range(sc, frextents, &mp->m_frextents,
- fsc->frextents)) {
+ fsc->frextents - fsc->frextents_delayed)) {
if (fsc->frozen)
xchk_set_corrupt(sc);
else
diff --git a/fs/xfs/scrub/fscounters.h b/fs/xfs/scrub/fscounters.h
index 461a13d25f4b38..bcf56e1c36f91c 100644
--- a/fs/xfs/scrub/fscounters.h
+++ b/fs/xfs/scrub/fscounters.h
@@ -12,6 +12,7 @@ struct xchk_fscounters {
uint64_t ifree;
uint64_t fdblocks;
uint64_t frextents;
+ uint64_t frextents_delayed;
unsigned long long icount_min;
unsigned long long icount_max;
bool frozen;
diff --git a/fs/xfs/scrub/fscounters_repair.c b/fs/xfs/scrub/fscounters_repair.c
index 94cdb852bee462..210ebbcf3e1520 100644
--- a/fs/xfs/scrub/fscounters_repair.c
+++ b/fs/xfs/scrub/fscounters_repair.c
@@ -65,7 +65,8 @@ xrep_fscounters(
percpu_counter_set(&mp->m_icount, fsc->icount);
percpu_counter_set(&mp->m_ifree, fsc->ifree);
percpu_counter_set(&mp->m_fdblocks, fsc->fdblocks);
- percpu_counter_set(&mp->m_frextents, fsc->frextents);
+ percpu_counter_set(&mp->m_frextents,
+ fsc->frextents - fsc->frextents_delayed);
mp->m_sb.sb_frextents = fsc->frextents;

return 0;
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index e7dfa259d0e6a2..2feb1a81bb87b5 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -34,6 +34,7 @@
#include "xfs_health.h"
#include "xfs_trace.h"
#include "xfs_ag.h"
+#include "xfs_rtbitmap.h"
#include "scrub/stats.h"

static DEFINE_MUTEX(xfs_uuid_table_mutex);
@@ -1402,9 +1403,20 @@ xfs_clear_incompat_log_features(
#define XFS_DELALLOC_BATCH (4096)
void
xfs_mod_delalloc(
- struct xfs_mount *mp,
- int64_t delta)
+ struct xfs_inode *ip,
+ int64_t data_delta,
+ int64_t ind_delta)
{
- percpu_counter_add_batch(&mp->m_delalloc_blks, delta,
+ struct xfs_mount *mp = ip->i_mount;
+
+ if (XFS_IS_REALTIME_INODE(ip)) {
+ percpu_counter_add_batch(&mp->m_delalloc_rtextents,
+ xfs_rtb_to_rtx(mp, data_delta),
+ XFS_DELALLOC_BATCH);
+ if (!ind_delta)
+ return;
+ data_delta = 0;
+ }
+ percpu_counter_add_batch(&mp->m_delalloc_blks, data_delta + ind_delta,
XFS_DELALLOC_BATCH);
}
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index d941437a0c7369..0e8d7779c0a561 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -195,6 +195,12 @@ typedef struct xfs_mount {
* extents or anything related to the rt device.
*/
struct percpu_counter m_delalloc_blks;
+
+ /*
+ * RT version of the above.
+ */
+ struct percpu_counter m_delalloc_rtextents;
+
/*
* Global count of allocation btree blocks in use across all AGs. Only
* used when perag reservation is enabled. Helps prevent block
@@ -577,6 +583,7 @@ struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
void xfs_force_summary_recalc(struct xfs_mount *mp);
int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
-void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
+void xfs_mod_delalloc(struct xfs_inode *ip, int64_t data_delta,
+ int64_t ind_delta);

#endif /* __XFS_MOUNT_H__ */
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 784ff7d1c986ba..39a5e664870485 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1051,12 +1051,18 @@ xfs_init_percpu_counters(
if (error)
goto free_fdblocks;

- error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL);
+ error = percpu_counter_init(&mp->m_delalloc_rtextents, 0, GFP_KERNEL);
if (error)
goto free_delalloc;

+ error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL);
+ if (error)
+ goto free_delalloc_rt;
+
return 0;

+free_delalloc_rt:
+ percpu_counter_destroy(&mp->m_delalloc_rtextents);
free_delalloc:
percpu_counter_destroy(&mp->m_delalloc_blks);
free_fdblocks:
@@ -1085,6 +1091,9 @@ xfs_destroy_percpu_counters(
percpu_counter_destroy(&mp->m_icount);
percpu_counter_destroy(&mp->m_ifree);
percpu_counter_destroy(&mp->m_fdblocks);
+ ASSERT(xfs_is_shutdown(mp) ||
+ percpu_counter_sum(&mp->m_delalloc_rtextents) == 0);
+ percpu_counter_destroy(&mp->m_delalloc_rtextents);
ASSERT(xfs_is_shutdown(mp) ||
percpu_counter_sum(&mp->m_delalloc_blks) == 0);
percpu_counter_destroy(&mp->m_delalloc_blks);
--
2.39.2