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mdadm/SOURCES/0022-mdadm-drop-get_required_spare_criteria.patch

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From f656201188d73cdc2726265f1348f8ffbf7587be Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Date: Thu, 29 Feb 2024 12:52:06 +0100
Subject: [PATCH 22/41] mdadm: drop get_required_spare_criteria()
Only IMSM implements get_spare_criteria, so load_super() in
get_required_spare_criteria() is dead code. It is moved inside
metadata handler, because only IMSM implements it.
Give possibility to provide devnode to be opened. With that we can hide
load_container() used only to fill spare criteria inside handler
and simplify implementation in generic code.
Add helper function for testing spare criteria in Incremental and
error messages.
File descriptor in get_spare_criteria_imsm() is always opened on purpose.
New functionality added in next patches will require it. For the same
reason, function is moved to other place.
No functional changes.
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---
Incremental.c | 77 ++++++++++++++++++++++----------
Monitor.c | 35 +++------------
mdadm.h | 5 +--
super-intel.c | 120 +++++++++++++++++++++++++++++++++-----------------
4 files changed, 140 insertions(+), 97 deletions(-)
diff --git a/Incremental.c b/Incremental.c
index 2b5a5859..66c2cc86 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -833,6 +833,53 @@ container_members_max_degradation(struct map_ent *map, struct map_ent *me)
return max_degraded;
}
+/**
+ * incremental_external_test_spare_criteria() - helper to test spare criteria.
+ * @st: supertype, must be not NULL, it is duplicated here.
+ * @container_devnm: devnm of the container.
+ * @disk_fd: file descriptor of device to tested.
+ * @verbose: verbose flag.
+ *
+ * The function is used on new drive verification path to check if it can be added to external
+ * container. To test spare criteria, metadata must be loaded. It duplicates super to not mess in
+ * original one.
+ * Function is executed if superblock supports get_spare_criteria(), otherwise success is returned.
+ */
+mdadm_status_t incremental_external_test_spare_criteria(struct supertype *st, char *container_devnm,
+ int disk_fd, int verbose)
+{
+ mdadm_status_t rv = MDADM_STATUS_ERROR;
+ char container_devname[PATH_MAX];
+ struct spare_criteria sc = {0};
+ struct supertype *dup;
+
+ if (!st->ss->get_spare_criteria)
+ return MDADM_STATUS_SUCCESS;
+
+ dup = dup_super(st);
+ snprintf(container_devname, PATH_MAX, "/dev/%s", container_devnm);
+
+ if (dup->ss->get_spare_criteria(dup, container_devname, &sc) != 0) {
+ if (verbose > 1)
+ pr_err("Failed to get spare criteria for %s\n", container_devname);
+ goto out;
+ }
+
+ if (!disk_fd_matches_criteria(disk_fd, &sc)) {
+ if (verbose > 1)
+ pr_err("Disk does not match spare criteria for %s\n", container_devname);
+ goto out;
+ }
+
+ rv = MDADM_STATUS_SUCCESS;
+
+out:
+ dup->ss->free_super(dup);
+ free(dup);
+
+ return rv;
+}
+
static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
struct map_ent *target, int bare,
struct supertype *st, int verbose)
@@ -873,8 +920,7 @@ static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
struct supertype *st2;
struct domainlist *dl = NULL;
struct mdinfo *sra;
- unsigned long long devsize, freesize = 0;
- struct spare_criteria sc = {0};
+ unsigned long long freesize = 0;
if (is_subarray(mp->metadata))
continue;
@@ -925,34 +971,19 @@ static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
if (sra->array.failed_disks == -1)
sra->array.failed_disks = container_members_max_degradation(map, mp);
- get_dev_size(dfd, NULL, &devsize);
if (sra->component_size == 0) {
- /* true for containers, here we must read superblock
- * to obtain minimum spare size */
- struct supertype *st3 = dup_super(st2);
- int mdfd = open_dev(mp->devnm);
- if (mdfd < 0) {
- free(st3);
+ /* true for containers */
+ if (incremental_external_test_spare_criteria(st2, mp->devnm, dfd, verbose))
goto next;
- }
- if (st3->ss->load_container &&
- !st3->ss->load_container(st3, mdfd, mp->path)) {
- if (st3->ss->get_spare_criteria)
- st3->ss->get_spare_criteria(st3, &sc);
- st3->ss->free_super(st3);
- }
- free(st3);
- close(mdfd);
}
- if ((sra->component_size > 0 &&
- st2->ss->validate_geometry(st2, sra->array.level, sra->array.layout,
+
+ if (sra->component_size > 0 &&
+ st2->ss->validate_geometry(st2, sra->array.level, sra->array.layout,
sra->array.raid_disks, &sra->array.chunk_size,
sra->component_size,
sra->devs ? sra->devs->data_offset : INVALID_SECTORS,
devname, &freesize, sra->consistency_policy,
- 0) &&
- freesize < sra->component_size) ||
- (sra->component_size == 0 && devsize < sc.min_size)) {
+ 0) && freesize < sra->component_size) {
if (verbose > 1)
pr_err("not adding %s to %s as it is too small\n",
devname, mp->path);
diff --git a/Monitor.c b/Monitor.c
index 1ece8712..6b4560ae 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -1008,34 +1008,6 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist)
return new_found;
}
-static int get_required_spare_criteria(struct state *st,
- struct spare_criteria *sc)
-{
- int fd;
-
- if (!st->metadata || !st->metadata->ss->get_spare_criteria) {
- sc->min_size = 0;
- sc->sector_size = 0;
- return 0;
- }
-
- fd = open(st->devname, O_RDONLY);
- if (fd < 0)
- return 1;
- if (st->metadata->ss->external)
- st->metadata->ss->load_container(st->metadata, fd, st->devname);
- else
- st->metadata->ss->load_super(st->metadata, fd, st->devname);
- close(fd);
- if (!st->metadata->sb)
- return 1;
-
- st->metadata->ss->get_spare_criteria(st->metadata, sc);
- st->metadata->ss->free_super(st->metadata);
-
- return 0;
-}
-
static int check_donor(struct state *from, struct state *to)
{
struct state *sub;
@@ -1178,8 +1150,11 @@ static void try_spare_migration(struct state *statelist)
/* member of a container */
to = to->parent;
- if (get_required_spare_criteria(to, &sc))
- continue;
+ if (to->metadata->ss->get_spare_criteria)
+ if (to->metadata->ss->get_spare_criteria(to->metadata, to->devname,
+ &sc))
+ continue;
+
if (to->metadata->ss->external) {
/* We must make sure there is
* no suitable spare in container already.
diff --git a/mdadm.h b/mdadm.h
index e8abd730..cbc586f5 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1116,10 +1116,9 @@ extern struct superswitch {
* Return spare criteria for array:
* - minimum disk size can be used in array;
* - sector size can be used in array.
- * Return values: 0 - for success and -EINVAL on error.
*/
- int (*get_spare_criteria)(struct supertype *st,
- struct spare_criteria *sc);
+ mdadm_status_t (*get_spare_criteria)(struct supertype *st, char *mddev_path,
+ struct spare_criteria *sc);
/* Find somewhere to put a bitmap - possibly auto-size it - and
* update the metadata to record this. The array may be newly
* created, in which case data_size may be updated, or it might
diff --git a/super-intel.c b/super-intel.c
index 39ec4754..7ad391ac 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -1736,46 +1736,6 @@ static __u32 imsm_min_reserved_sectors(struct intel_super *super)
return (remainder < rv) ? remainder : rv;
}
-/*
- * Return minimum size of a spare and sector size
- * that can be used in this array
- */
-int get_spare_criteria_imsm(struct supertype *st, struct spare_criteria *c)
-{
- struct intel_super *super = st->sb;
- struct dl *dl;
- struct extent *e;
- int i;
- unsigned long long size = 0;
-
- if (!super)
- return -EINVAL;
- /* find first active disk in array */
- dl = super->disks;
- while (dl && (is_failed(&dl->disk) || dl->index == -1))
- dl = dl->next;
- if (!dl)
- return -EINVAL;
- /* find last lba used by subarrays */
- e = get_extents(super, dl, 0);
- if (!e)
- return -EINVAL;
- for (i = 0; e[i].size; i++)
- continue;
- if (i > 0)
- size = e[i-1].start + e[i-1].size;
- free(e);
-
- /* add the amount of space needed for metadata */
- size += imsm_min_reserved_sectors(super);
-
- c->min_size = size * 512;
- c->sector_size = super->sector_size;
- c->criteria_set = true;
-
- return 0;
-}
-
static bool is_gen_migration(struct imsm_dev *dev);
#define IMSM_4K_DIV 8
@@ -11295,6 +11255,84 @@ static const char *imsm_get_disk_controller_domain(const char *path)
return drv;
}
+/**
+ * get_spare_criteria_imsm() - set spare criteria.
+ * @st: supertype.
+ * @mddev_path: path to md device devnode, it must be container.
+ * @c: spare_criteria struct to fill, not NULL.
+ *
+ * If superblock is not loaded, use mddev_path to load_container. It must be given in this case.
+ * Filles size and sector size accordingly to superblock.
+ */
+mdadm_status_t get_spare_criteria_imsm(struct supertype *st, char *mddev_path,
+ struct spare_criteria *c)
+{
+ mdadm_status_t ret = MDADM_STATUS_ERROR;
+ bool free_superblock = false;
+ unsigned long long size = 0;
+ struct intel_super *super;
+ struct extent *e;
+ struct dl *dl;
+ int i;
+
+ /* If no superblock and no mddev_path, we cannot load superblock. */
+ assert(st->sb || mddev_path);
+
+ if (mddev_path) {
+ int fd = open(mddev_path, O_RDONLY);
+
+ if (!is_fd_valid(fd))
+ return MDADM_STATUS_ERROR;
+
+ if (!st->sb) {
+ if (load_container_imsm(st, fd, st->devnm)) {
+ close(fd);
+ return MDADM_STATUS_ERROR;
+ }
+ free_superblock = true;
+ }
+ close(fd);
+ }
+
+ super = st->sb;
+
+ /* find first active disk in array */
+ dl = super->disks;
+ while (dl && (is_failed(&dl->disk) || dl->index == -1))
+ dl = dl->next;
+
+ if (!dl)
+ goto out;
+
+ /* find last lba used by subarrays */
+ e = get_extents(super, dl, 0);
+ if (!e)
+ goto out;
+
+ for (i = 0; e[i].size; i++)
+ continue;
+ if (i > 0)
+ size = e[i - 1].start + e[i - 1].size;
+ free(e);
+
+ /* add the amount of space needed for metadata */
+ size += imsm_min_reserved_sectors(super);
+
+ c->min_size = size * 512;
+ c->sector_size = super->sector_size;
+ c->criteria_set = true;
+ ret = MDADM_STATUS_SUCCESS;
+
+out:
+ if (free_superblock)
+ free_super_imsm(st);
+
+ if (ret != MDADM_STATUS_SUCCESS)
+ c->criteria_set = false;
+
+ return ret;
+}
+
static char *imsm_find_array_devnm_by_subdev(int subdev, char *container)
{
static char devnm[32];
@@ -11425,7 +11463,7 @@ static struct mdinfo *get_spares_for_grow(struct supertype *st)
{
struct spare_criteria sc;
- get_spare_criteria_imsm(st, &sc);
+ get_spare_criteria_imsm(st, NULL, &sc);
return container_choose_spares(st, &sc, NULL, NULL, NULL, 0);
}
--
2.40.1
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