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From: Dave Chinner <david@fromorbit.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH 27/42] xfs: move the minimum agno checks into xfs_alloc_vextent_check_args
Date: Thu, 19 Jan 2023 09:44:50 +1100	[thread overview]
Message-ID: <20230118224505.1964941-28-david@fromorbit.com> (raw)
In-Reply-To: <20230118224505.1964941-1-david@fromorbit.com>

From: Dave Chinner <dchinner@redhat.com>

All of the allocation functions now extract the minimum allowed AG
from the transaction and then use it in some way. The allocation
functions that are restricted to a single AG all check if the
AG requested can be allocated from and return an error if so. These
all set args->agno appropriately.

All the allocation functions that iterate AGs use it to calculate
the scan start AG. args->agno is not set until the iterator starts
walking AGs.

Hence we can easily set up a conditional check against the minimum
AG allowed in xfs_alloc_vextent_check_args() based on whether
args->agno contains NULLAGNUMBER or not and move all the repeated
setup code to xfs_alloc_vextent_check_args(), further simplifying
the allocation functions.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
 fs/xfs/libxfs/xfs_alloc.c | 88 +++++++++++++++------------------------
 1 file changed, 33 insertions(+), 55 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 4de9026d872f..43a054002da3 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -3089,14 +3089,18 @@ xfs_alloc_read_agf(
 static int
 xfs_alloc_vextent_check_args(
 	struct xfs_alloc_arg	*args,
-	xfs_rfsblock_t		target)
+	xfs_rfsblock_t		target,
+	xfs_agnumber_t		*minimum_agno)
 {
 	struct xfs_mount	*mp = args->mp;
 	xfs_agblock_t		agsize;
 
-	args->agbno = NULLAGBLOCK;
 	args->fsbno = NULLFSBLOCK;
 
+	*minimum_agno = 0;
+	if (args->tp->t_highest_agno != NULLAGNUMBER)
+		*minimum_agno = args->tp->t_highest_agno;
+
 	/*
 	 * Just fix this up, for the case where the last a.g. is shorter
 	 * (or there's only one a.g.) and the caller couldn't easily figure
@@ -3123,11 +3127,16 @@ xfs_alloc_vextent_check_args(
 	    XFS_FSB_TO_AGBNO(mp, target) >= agsize ||
 	    args->minlen > args->maxlen || args->minlen > agsize ||
 	    args->mod >= args->prod) {
-		args->fsbno = NULLFSBLOCK;
 		trace_xfs_alloc_vextent_badargs(args);
 		return -ENOSPC;
 	}
+
+	if (args->agno != NULLAGNUMBER && *minimum_agno > args->agno) {
+		trace_xfs_alloc_vextent_skip_deadlock(args);
+		return -ENOSPC;
+	}
 	return 0;
+
 }
 
 /*
@@ -3266,28 +3275,19 @@ xfs_alloc_vextent_this_ag(
 	xfs_agnumber_t		agno)
 {
 	struct xfs_mount	*mp = args->mp;
-	xfs_agnumber_t		minimum_agno = 0;
+	xfs_agnumber_t		minimum_agno;
 	int			error;
 
-	if (args->tp->t_highest_agno != NULLAGNUMBER)
-		minimum_agno = args->tp->t_highest_agno;
-
-	if (minimum_agno > agno) {
-		trace_xfs_alloc_vextent_skip_deadlock(args);
-		args->fsbno = NULLFSBLOCK;
-		return 0;
-	}
-
-	error = xfs_alloc_vextent_check_args(args, XFS_AGB_TO_FSB(mp, agno, 0));
+	args->agno = agno;
+	args->agbno = 0;
+	error = xfs_alloc_vextent_check_args(args, XFS_AGB_TO_FSB(mp, agno, 0),
+			&minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
 			return 0;
 		return error;
 	}
 
-	args->agno = agno;
-	args->agbno = 0;
-
 	error = xfs_alloc_vextent_prepare_ag(args);
 	if (!error && args->agbp)
 		error = xfs_alloc_ag_vextent_size(args);
@@ -3400,16 +3400,15 @@ xfs_alloc_vextent_start_ag(
 	xfs_rfsblock_t		target)
 {
 	struct xfs_mount	*mp = args->mp;
-	xfs_agnumber_t		minimum_agno = 0;
+	xfs_agnumber_t		minimum_agno;
 	xfs_agnumber_t		start_agno;
 	xfs_agnumber_t		rotorstep = xfs_rotorstep;
 	bool			bump_rotor = false;
 	int			error;
 
-	if (args->tp->t_highest_agno != NULLAGNUMBER)
-		minimum_agno = args->tp->t_highest_agno;
-
-	error = xfs_alloc_vextent_check_args(args, target);
+	args->agno = NULLAGNUMBER;
+	args->agbno = NULLAGBLOCK;
+	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
 			return 0;
@@ -3451,14 +3450,13 @@ xfs_alloc_vextent_first_ag(
 	xfs_rfsblock_t		target)
  {
 	struct xfs_mount	*mp = args->mp;
-	xfs_agnumber_t		minimum_agno = 0;
+	xfs_agnumber_t		minimum_agno;
 	xfs_agnumber_t		start_agno;
 	int			error;
 
-	if (args->tp->t_highest_agno != NULLAGNUMBER)
-		minimum_agno = args->tp->t_highest_agno;
-
-	error = xfs_alloc_vextent_check_args(args, target);
+	args->agno = NULLAGNUMBER;
+	args->agbno = NULLAGBLOCK;
+	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
 			return 0;
@@ -3481,28 +3479,18 @@ xfs_alloc_vextent_exact_bno(
 	xfs_rfsblock_t		target)
 {
 	struct xfs_mount	*mp = args->mp;
-	xfs_agnumber_t		minimum_agno = 0;
+	xfs_agnumber_t		minimum_agno;
 	int			error;
 
-	if (args->tp->t_highest_agno != NULLAGNUMBER)
-		minimum_agno = args->tp->t_highest_agno;
-
-	error = xfs_alloc_vextent_check_args(args, target);
+	args->agno = XFS_FSB_TO_AGNO(mp, target);
+	args->agbno = XFS_FSB_TO_AGBNO(mp, target);
+	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
 			return 0;
 		return error;
 	}
 
-	args->agno = XFS_FSB_TO_AGNO(mp, target);
-	if (minimum_agno > args->agno) {
-		trace_xfs_alloc_vextent_skip_deadlock(args);
-		args->fsbno = NULLFSBLOCK;
-		return 0;
-	}
-
-	args->agbno = XFS_FSB_TO_AGBNO(mp, target);
-
 	error = xfs_alloc_vextent_prepare_ag(args);
 	if (!error && args->agbp)
 		error = xfs_alloc_ag_vextent_exact(args);
@@ -3522,32 +3510,22 @@ xfs_alloc_vextent_near_bno(
 	xfs_rfsblock_t		target)
 {
 	struct xfs_mount	*mp = args->mp;
-	xfs_agnumber_t		minimum_agno = 0;
+	xfs_agnumber_t		minimum_agno;
 	bool			needs_perag = args->pag == NULL;
 	int			error;
 
-	if (args->tp->t_highest_agno != NULLAGNUMBER)
-		minimum_agno = args->tp->t_highest_agno;
-
-	error = xfs_alloc_vextent_check_args(args, target);
+	args->agno = XFS_FSB_TO_AGNO(mp, target);
+	args->agbno = XFS_FSB_TO_AGBNO(mp, target);
+	error = xfs_alloc_vextent_check_args(args, target, &minimum_agno);
 	if (error) {
 		if (error == -ENOSPC)
 			return 0;
 		return error;
 	}
 
-	args->agno = XFS_FSB_TO_AGNO(mp, target);
-	if (minimum_agno > args->agno) {
-		trace_xfs_alloc_vextent_skip_deadlock(args);
-		args->fsbno = NULLFSBLOCK;
-		return 0;
-	}
-
 	if (needs_perag)
 		args->pag = xfs_perag_get(mp, args->agno);
 
-	args->agbno = XFS_FSB_TO_AGBNO(mp, target);
-
 	error = xfs_alloc_vextent_prepare_ag(args);
 	if (!error && args->agbp)
 		error = xfs_alloc_ag_vextent_near(args);
-- 
2.39.0


  parent reply	other threads:[~2023-01-18 22:45 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-18 22:44 [PATCH 00/42] xfs: per-ag centric allocation alogrithms Dave Chinner
2023-01-18 22:44 ` [PATCH 01/42] xfs: fix low space alloc deadlock Dave Chinner
2023-01-19 16:39   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 02/42] xfs: prefer free inodes at ENOSPC over chunk allocation Dave Chinner
2023-01-19 19:08   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 03/42] xfs: block reservation too large for minleft allocation Dave Chinner
2023-01-19 20:38   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 04/42] xfs: drop firstblock constraints from allocation setup Dave Chinner
2023-01-19 22:03   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 05/42] xfs: t_firstblock is tracking AGs not blocks Dave Chinner
2023-01-19 22:12   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 06/42] xfs: don't assert fail on transaction cancel with deferred ops Dave Chinner
2023-01-19 22:18   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 07/42] xfs: active perag reference counting Dave Chinner
2023-01-21  5:16   ` Allison Henderson
2023-02-01 19:08   ` Darrick J. Wong
2023-02-06 22:56     ` Dave Chinner
2023-01-18 22:44 ` [PATCH 08/42] xfs: rework the perag trace points to be perag centric Dave Chinner
2023-01-21  5:16   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 09/42] xfs: convert xfs_imap() to take a perag Dave Chinner
2023-02-01 19:10   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 10/42] xfs: use active perag references for inode allocation Dave Chinner
2023-01-22  6:48   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 11/42] xfs: inobt can use perags in many more places than it does Dave Chinner
2023-01-22  6:48   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 12/42] xfs: convert xfs_ialloc_next_ag() to an atomic Dave Chinner
2023-01-22  7:03   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 13/42] xfs: perags need atomic operational state Dave Chinner
2023-01-23  4:04   ` Allison Henderson
2023-01-18 22:44 ` [PATCH 14/42] xfs: introduce xfs_for_each_perag_wrap() Dave Chinner
2023-01-23  5:41   ` Allison Henderson
2023-02-06 23:14     ` Dave Chinner
2023-02-01 19:28   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 15/42] xfs: rework xfs_alloc_vextent() Dave Chinner
2023-02-01 19:39   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 16/42] xfs: factor xfs_alloc_vextent_this_ag() for _iterate_ags() Dave Chinner
2023-01-18 22:44 ` [PATCH 17/42] xfs: combine __xfs_alloc_vextent_this_ag and xfs_alloc_ag_vextent Dave Chinner
2023-02-01 22:25   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 18/42] xfs: use xfs_alloc_vextent_this_ag() where appropriate Dave Chinner
2023-01-18 22:44 ` [PATCH 19/42] xfs: factor xfs_bmap_btalloc() Dave Chinner
2023-01-18 22:44 ` [PATCH 20/42] xfs: use xfs_alloc_vextent_first_ag() where appropriate Dave Chinner
2023-02-01 22:43   ` Darrick J. Wong
2023-02-06 23:16     ` Dave Chinner
2023-01-18 22:44 ` [PATCH 21/42] xfs: use xfs_alloc_vextent_start_bno() " Dave Chinner
2023-02-01 22:51   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 22/42] xfs: introduce xfs_alloc_vextent_near_bno() Dave Chinner
2023-02-01 22:52   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 23/42] xfs: introduce xfs_alloc_vextent_exact_bno() Dave Chinner
2023-02-01 23:00   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 24/42] xfs: introduce xfs_alloc_vextent_prepare() Dave Chinner
2023-01-18 22:44 ` [PATCH 25/42] xfs: move allocation accounting to xfs_alloc_vextent_set_fsbno() Dave Chinner
2023-01-18 22:44 ` [PATCH 26/42] xfs: fold xfs_alloc_ag_vextent() into callers Dave Chinner
2023-01-18 22:44 ` Dave Chinner [this message]
2023-01-18 22:44 ` [PATCH 28/42] xfs: convert xfs_alloc_vextent_iterate_ags() to use perag walker Dave Chinner
2023-02-01 23:13   ` Darrick J. Wong
2023-01-18 22:44 ` [PATCH 29/42] xfs: convert trim to use for_each_perag_range Dave Chinner
2023-02-01 23:15   ` Darrick J. Wong
2023-02-06 23:19     ` Dave Chinner
2023-01-18 22:44 ` [PATCH 30/42] xfs: factor out filestreams from xfs_bmap_btalloc_nullfb Dave Chinner
2023-01-18 22:44 ` [PATCH 31/42] xfs: get rid of notinit from xfs_bmap_longest_free_extent Dave Chinner
2023-01-18 22:44 ` [PATCH 32/42] xfs: use xfs_bmap_longest_free_extent() in filestreams Dave Chinner
2023-01-18 22:44 ` [PATCH 33/42] xfs: move xfs_bmap_btalloc_filestreams() to xfs_filestreams.c Dave Chinner
2023-01-18 22:44 ` [PATCH 34/42] xfs: merge filestream AG lookup into xfs_filestream_select_ag() Dave Chinner
2023-01-18 22:44 ` [PATCH 35/42] xfs: merge new filestream AG selection " Dave Chinner
2023-01-18 22:44 ` [PATCH 36/42] xfs: remove xfs_filestream_select_ag() longest extent check Dave Chinner
2023-01-18 22:45 ` [PATCH 37/42] xfs: factor out MRU hit case in xfs_filestream_select_ag Dave Chinner
2023-01-18 22:45 ` [PATCH 38/42] xfs: track an active perag reference in filestreams Dave Chinner
2023-01-18 22:45 ` [PATCH 39/42] xfs: use for_each_perag_wrap in xfs_filestream_pick_ag Dave Chinner
2023-01-18 22:45 ` [PATCH 40/42] xfs: pass perag to filestreams tracing Dave Chinner
2023-01-18 22:45 ` [PATCH 41/42] xfs: return a referenced perag from filestreams allocator Dave Chinner
2023-02-02  0:01   ` Darrick J. Wong
2023-02-06 23:22     ` Dave Chinner
2023-01-18 22:45 ` [PATCH 42/42] xfs: refactor the filestreams allocator pick functions Dave Chinner
2023-02-02  0:08   ` Darrick J. Wong
2023-02-06 23:26     ` Dave Chinner
2023-02-02  0:14 ` [PATCH 00/42] xfs: per-ag centric allocation alogrithms Darrick J. Wong
2023-02-06 23:13   ` Dave Chinner
2023-02-09 22:17 [PATCH v3 " Dave Chinner
2023-02-09 22:18 ` [PATCH 27/42] xfs: move the minimum agno checks into xfs_alloc_vextent_check_args Dave Chinner

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