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From 0c0f09cb035b6a27a1d11c54836742a9945a5014 Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Date: Thu, 29 Feb 2024 12:52:05 +0100
Subject: [PATCH 21/41] mdadm: Add functions for spare criteria verification
It is done similar way in few places. As a result, two almost identical
functions (dev_size_from_id() and dev_sector_size_from_id()) are
removed. Now, it uses same file descriptor to send two ioctls.
Two extern functions are added, in next patches
disk_fd_matches_criteria() is used.
Next optimization is inline zeroing struct spare_criteria. With that,
we don't need to reset values in get_spare_criteria_imsm().
Dedicated boolean field for checking if criteria are filled is added.
We don't need to execute the code if it is not set.
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---
Incremental.c | 2 +-
Monitor.c | 14 +------
mdadm.h | 6 ++-
super-intel.c | 4 +-
util.c | 112 ++++++++++++++++++++++++++------------------------
5 files changed, 67 insertions(+), 71 deletions(-)
diff --git a/Incremental.c b/Incremental.c
index 30c07c03..2b5a5859 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -874,7 +874,7 @@ static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
struct domainlist *dl = NULL;
struct mdinfo *sra;
unsigned long long devsize, freesize = 0;
- struct spare_criteria sc = {0, 0};
+ struct spare_criteria sc = {0};
if (is_subarray(mp->metadata))
continue;
diff --git a/Monitor.c b/Monitor.c
index 9be2b528..1ece8712 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -1070,22 +1070,12 @@ static dev_t choose_spare(struct state *from, struct state *to,
for (d = from->raid; !dev && d < MAX_DISKS; d++) {
if (from->devid[d] > 0 && from->devstate[d] == 0) {
struct dev_policy *pol;
- unsigned long long dev_size;
- unsigned int dev_sector_size;
if (to->metadata->ss->external &&
test_partition_from_id(from->devid[d]))
continue;
- if (sc->min_size &&
- dev_size_from_id(from->devid[d], &dev_size) &&
- dev_size < sc->min_size)
- continue;
-
- if (sc->sector_size &&
- dev_sector_size_from_id(from->devid[d],
- &dev_sector_size) &&
- sc->sector_size != dev_sector_size)
+ if (devid_matches_criteria(from->devid[d], sc) == false)
continue;
pol = devid_policy(from->devid[d]);
@@ -1170,12 +1160,12 @@ static void try_spare_migration(struct state *statelist)
{
struct state *from;
struct state *st;
- struct spare_criteria sc;
link_containers_with_subarrays(statelist);
for (st = statelist; st; st = st->next)
if (st->active < st->raid && st->spare == 0 && !st->err) {
struct domainlist *domlist = NULL;
+ struct spare_criteria sc = {0};
int d;
struct state *to = st;
diff --git a/mdadm.h b/mdadm.h
index 75c887e4..e8abd730 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -430,6 +430,7 @@ struct createinfo {
};
struct spare_criteria {
+ bool criteria_set;
unsigned long long min_size;
unsigned int sector_size;
};
@@ -1368,8 +1369,6 @@ extern struct supertype *dup_super(struct supertype *st);
extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
extern int get_dev_sector_size(int fd, char *dname, unsigned int *sectsizep);
extern int must_be_container(int fd);
-extern int dev_size_from_id(dev_t id, unsigned long long *size);
-extern int dev_sector_size_from_id(dev_t id, unsigned int *size);
void wait_for(char *dev, int fd);
/*
@@ -1708,6 +1707,9 @@ extern int assemble_container_content(struct supertype *st, int mdfd,
#define INCR_UNSAFE 2
#define INCR_ALREADY 4
#define INCR_YES 8
+
+extern bool devid_matches_criteria(dev_t devid, struct spare_criteria *sc);
+extern bool disk_fd_matches_criteria(int disk_fd, struct spare_criteria *sc);
extern struct mdinfo *container_choose_spares(struct supertype *st,
struct spare_criteria *criteria,
struct domainlist *domlist,
diff --git a/super-intel.c b/super-intel.c
index 4babec9f..39ec4754 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -1748,9 +1748,6 @@ int get_spare_criteria_imsm(struct supertype *st, struct spare_criteria *c)
int i;
unsigned long long size = 0;
- c->min_size = 0;
- c->sector_size = 0;
-
if (!super)
return -EINVAL;
/* find first active disk in array */
@@ -1774,6 +1771,7 @@ int get_spare_criteria_imsm(struct supertype *st, struct spare_criteria *c)
c->min_size = size * 512;
c->sector_size = super->sector_size;
+ c->criteria_set = true;
return 0;
}
diff --git a/util.c b/util.c
index b1454473..041e78cf 100644
--- a/util.c
+++ b/util.c
@@ -1266,40 +1266,6 @@ struct supertype *super_by_fd(int fd, char **subarrayp)
return st;
}
-int dev_size_from_id(dev_t id, unsigned long long *size)
-{
- char buf[20];
- int fd;
-
- sprintf(buf, "%d:%d", major(id), minor(id));
- fd = dev_open(buf, O_RDONLY);
- if (fd < 0)
- return 0;
- if (get_dev_size(fd, NULL, size)) {
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
-int dev_sector_size_from_id(dev_t id, unsigned int *size)
-{
- char buf[20];
- int fd;
-
- sprintf(buf, "%d:%d", major(id), minor(id));
- fd = dev_open(buf, O_RDONLY);
- if (fd < 0)
- return 0;
- if (get_dev_sector_size(fd, NULL, size)) {
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
struct supertype *dup_super(struct supertype *orig)
{
struct supertype *st;
@@ -2088,6 +2054,60 @@ void append_metadata_update(struct supertype *st, void *buf, int len)
unsigned int __invalid_size_argument_for_IOC = 0;
#endif
+/**
+ * disk_fd_matches_criteria() - check if device matches spare criteria.
+ * @disk_fd: file descriptor of the disk.
+ * @sc: criteria to test.
+ *
+ * Return: true if disk matches criteria, false otherwise.
+ */
+bool disk_fd_matches_criteria(int disk_fd, struct spare_criteria *sc)
+{
+ unsigned int dev_sector_size = 0;
+ unsigned long long dev_size = 0;
+
+ if (!sc->criteria_set)
+ return true;
+
+ if (!get_dev_size(disk_fd, NULL, &dev_size) || dev_size < sc->min_size)
+ return false;
+
+ if (!get_dev_sector_size(disk_fd, NULL, &dev_sector_size) ||
+ sc->sector_size != dev_sector_size)
+ return false;
+
+ return true;
+}
+
+/**
+ * devid_matches_criteria() - check if device referenced by devid matches spare criteria.
+ * @devid: devid of the device to check.
+ * @sc: criteria to test.
+ *
+ * Return: true if disk matches criteria, false otherwise.
+ */
+bool devid_matches_criteria(dev_t devid, struct spare_criteria *sc)
+{
+ char buf[NAME_MAX];
+ bool ret;
+ int fd;
+
+ if (!sc->criteria_set)
+ return true;
+
+ snprintf(buf, NAME_MAX, "%d:%d", major(devid), minor(devid));
+
+ fd = dev_open(buf, O_RDONLY);
+ if (!is_fd_valid(fd))
+ return false;
+
+ /* Error code inherited */
+ ret = disk_fd_matches_criteria(fd, sc);
+
+ close(fd);
+ return ret;
+}
+
/* Pick all spares matching given criteria from a container
* if min_size == 0 do not check size
* if domlist == NULL do not check domains
@@ -2111,28 +2131,13 @@ struct mdinfo *container_choose_spares(struct supertype *st,
dp = &disks->devs;
disks->array.spare_disks = 0;
while (*dp) {
- int found = 0;
+ bool found = false;
+
d = *dp;
if (d->disk.state == 0) {
- /* check if size is acceptable */
- unsigned long long dev_size;
- unsigned int dev_sector_size;
- int size_valid = 0;
- int sector_size_valid = 0;
-
dev_t dev = makedev(d->disk.major,d->disk.minor);
- if (!criteria->min_size ||
- (dev_size_from_id(dev, &dev_size) &&
- dev_size >= criteria->min_size))
- size_valid = 1;
-
- if (!criteria->sector_size ||
- (dev_sector_size_from_id(dev, &dev_sector_size) &&
- criteria->sector_size == dev_sector_size))
- sector_size_valid = 1;
-
- found = size_valid && sector_size_valid;
+ found = devid_matches_criteria(dev, criteria);
/* check if domain matches */
if (found && domlist) {
@@ -2141,7 +2146,8 @@ struct mdinfo *container_choose_spares(struct supertype *st,
pol_add(&pol, pol_domain,
spare_group, NULL);
if (domain_test(domlist, pol, metadata) != 1)
- found = 0;
+ found = false;
+
dev_policy_free(pol);
}
}
--
2.40.1
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