summaryrefslogtreecommitdiffstats
path: root/fs/xfs/libxfs/xfs_alloc.c
diff options
context:
space:
mode:
authorDave Chinner <dchinner@redhat.com>2023-02-12 23:14:54 +0100
committerDave Chinner <dchinner@redhat.com>2023-02-12 23:14:54 +0100
commit8b81356825ffb96b3b167b4dabbbbdb506bb0e0b (patch)
tree840748e7d638bc622a8d634bfe82b44fd6d49b75 /fs/xfs/libxfs/xfs_alloc.c
parentxfs: fold xfs_alloc_ag_vextent() into callers (diff)
downloadlinux-8b81356825ffb96b3b167b4dabbbbdb506bb0e0b.tar.xz
linux-8b81356825ffb96b3b167b4dabbbbdb506bb0e0b.zip
xfs: move the minimum agno checks into xfs_alloc_vextent_check_args
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> Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc.c')
-rw-r--r--fs/xfs/libxfs/xfs_alloc.c88
1 files changed, 33 insertions, 55 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 50eb44851f23..94cea96caf5d 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_fsblock_t target)
+ xfs_fsblock_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_fsblock_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_fsblock_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_fsblock_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_fsblock_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);