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md-bitmap: suspend array earlier in location_store()

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Now that mddev_suspend() doean't rely on 'mddev->pers' to be set, it's
safe to call mddev_suspend() earlier.

This will also be helper to refactor mddev_suspend() later.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230825030956.1527023-6-yukuai1@huaweicloud.com
This commit is contained in:
Yu Kuai 2023-08-25 11:09:54 +08:00 committed by Song Liu
parent b71fe4ac75
commit 158d32af87
1 changed files with 20 additions and 23 deletions
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43
drivers/md/md-bitmap.c
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@ -2351,6 +2351,8 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
rv = mddev_lock(mddev);
if (rv)
return rv;
mddev_suspend(mddev);
if (mddev->pers) {
if (mddev->recovery || mddev->sync_thread) {
rv = -EBUSY;
@ -2365,11 +2367,8 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
rv = -EBUSY;
goto out;
}
if (mddev->pers) {
mddev_suspend(mddev);
md_bitmap_destroy(mddev);
mddev_resume(mddev);
}
md_bitmap_destroy(mddev);
mddev->bitmap_info.offset = 0;
if (mddev->bitmap_info.file) {
struct file *f = mddev->bitmap_info.file;
@ -2379,6 +2378,8 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
} else {
/* No bitmap, OK to set a location */
long long offset;
struct bitmap *bitmap;
if (strncmp(buf, "none", 4) == 0)
/* nothing to be done */;
else if (strncmp(buf, "file:", 5) == 0) {
@ -2402,25 +2403,20 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
rv = -EINVAL;
goto out;
}
mddev->bitmap_info.offset = offset;
if (mddev->pers) {
struct bitmap *bitmap;
bitmap = md_bitmap_create(mddev, -1);
mddev_suspend(mddev);
if (IS_ERR(bitmap))
rv = PTR_ERR(bitmap);
else {
mddev->bitmap = bitmap;
rv = md_bitmap_load(mddev);
if (rv)
mddev->bitmap_info.offset = 0;
}
if (rv) {
md_bitmap_destroy(mddev);
mddev_resume(mddev);
goto out;
}
mddev_resume(mddev);
bitmap = md_bitmap_create(mddev, -1);
if (IS_ERR(bitmap)) {
rv = PTR_ERR(bitmap);
goto out;
}
mddev->bitmap = bitmap;
rv = md_bitmap_load(mddev);
if (rv) {
mddev->bitmap_info.offset = 0;
md_bitmap_destroy(mddev);
goto out;
}
}
}
@ -2433,6 +2429,7 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
}
rv = 0;
out:
mddev_resume(mddev);
mddev_unlock(mddev);
if (rv)
return rv;