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Code Issues Releases Wiki Activity

bcache: port block device access to files

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Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-13-adbd023e19cc@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-01-23 14:26:30 +01:00
parent be914f8fd2
commit 3789fb8746
No known key found for this signature in database
GPG key ID: 91C61BC06578DCA2
2 changed files with 39 additions and 39 deletions
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4
drivers/md/bcache/bcache.h
View file

@ -300,7 +300,7 @@ struct cached_dev {
struct list_head list;
struct bcache_device disk;
struct block_device *bdev;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
struct cache_sb sb;
struct cache_sb_disk *sb_disk;
@ -423,7 +423,7 @@ struct cache {
struct kobject kobj;
struct block_device *bdev;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
struct task_struct *alloc_thread;

74
drivers/md/bcache/super.c
View file

@ -1369,8 +1369,8 @@ static CLOSURE_CALLBACK(cached_dev_free)
if (dc->sb_disk)
put_page(virt_to_page(dc->sb_disk));
if (dc->bdev_handle)
bdev_release(dc->bdev_handle);
if (dc->bdev_file)
fput(dc->bdev_file);
wake_up(&unregister_wait);
@ -1445,7 +1445,7 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
/* Cached device - bcache superblock */
static int register_bdev(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
struct bdev_handle *bdev_handle,
struct file *bdev_file,
struct cached_dev *dc)
{
const char *err = "cannot allocate memory";
@ -1453,8 +1453,8 @@ static int register_bdev(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
int ret = -ENOMEM;
memcpy(&dc->sb, sb, sizeof(struct cache_sb));
dc->bdev_handle = bdev_handle;
dc->bdev = bdev_handle->bdev;
dc->bdev_file = bdev_file;
dc->bdev = file_bdev(bdev_file);
dc->sb_disk = sb_disk;
if (cached_dev_init(dc, sb->block_size << 9))
@ -2218,8 +2218,8 @@ void bch_cache_release(struct kobject *kobj)
if (ca->sb_disk)
put_page(virt_to_page(ca->sb_disk));
if (ca->bdev_handle)
bdev_release(ca->bdev_handle);
if (ca->bdev_file)
fput(ca->bdev_file);
kfree(ca);
module_put(THIS_MODULE);
@ -2339,18 +2339,18 @@ static int cache_alloc(struct cache *ca)
}
static int register_cache(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
struct bdev_handle *bdev_handle,
struct file *bdev_file,
struct cache *ca)
{
const char *err = NULL; /* must be set for any error case */
int ret = 0;
memcpy(&ca->sb, sb, sizeof(struct cache_sb));
ca->bdev_handle = bdev_handle;
ca->bdev = bdev_handle->bdev;
ca->bdev_file = bdev_file;
ca->bdev = file_bdev(bdev_file);
ca->sb_disk = sb_disk;
if (bdev_max_discard_sectors((bdev_handle->bdev)))
if (bdev_max_discard_sectors(file_bdev(bdev_file)))
ca->discard = CACHE_DISCARD(&ca->sb);
ret = cache_alloc(ca);
@ -2361,20 +2361,20 @@ static int register_cache(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
err = "cache_alloc(): cache device is too small";
else
err = "cache_alloc(): unknown error";
pr_notice("error %pg: %s\n", bdev_handle->bdev, err);
pr_notice("error %pg: %s\n", file_bdev(bdev_file), err);
/*
* If we failed here, it means ca->kobj is not initialized yet,
* kobject_put() won't be called and there is no chance to
* call bdev_release() to bdev in bch_cache_release(). So
* we explicitly call bdev_release() here.
* call fput() to bdev in bch_cache_release(). So
* we explicitly call fput() on the block device here.
*/
bdev_release(bdev_handle);
fput(bdev_file);
return ret;
}
if (kobject_add(&ca->kobj, bdev_kobj(bdev_handle->bdev), "bcache")) {
if (kobject_add(&ca->kobj, bdev_kobj(file_bdev(bdev_file)), "bcache")) {
pr_notice("error %pg: error calling kobject_add\n",
bdev_handle->bdev);
file_bdev(bdev_file));
ret = -ENOMEM;
goto out;
}
@ -2388,7 +2388,7 @@ static int register_cache(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
goto out;
}
pr_info("registered cache device %pg\n", ca->bdev_handle->bdev);
pr_info("registered cache device %pg\n", file_bdev(ca->bdev_file));
out:
kobject_put(&ca->kobj);
@ -2446,7 +2446,7 @@ struct async_reg_args {
char *path;
struct cache_sb *sb;
struct cache_sb_disk *sb_disk;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
void *holder;
};
@ -2457,7 +2457,7 @@ static void register_bdev_worker(struct work_struct *work)
container_of(work, struct async_reg_args, reg_work.work);
mutex_lock(&bch_register_lock);
if (register_bdev(args->sb, args->sb_disk, args->bdev_handle,
if (register_bdev(args->sb, args->sb_disk, args->bdev_file,
args->holder) < 0)
fail = true;
mutex_unlock(&bch_register_lock);
@ -2478,7 +2478,7 @@ static void register_cache_worker(struct work_struct *work)
container_of(work, struct async_reg_args, reg_work.work);
/* blkdev_put() will be called in bch_cache_release() */
if (register_cache(args->sb, args->sb_disk, args->bdev_handle,
if (register_cache(args->sb, args->sb_disk, args->bdev_file,
args->holder))
fail = true;
@ -2516,7 +2516,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
char *path = NULL;
struct cache_sb *sb;
struct cache_sb_disk *sb_disk;
struct bdev_handle *bdev_handle, *bdev_handle2;
struct file *bdev_file, *bdev_file2;
void *holder = NULL;
ssize_t ret;
bool async_registration = false;
@ -2549,15 +2549,15 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
ret = -EINVAL;
err = "failed to open device";
bdev_handle = bdev_open_by_path(strim(path), BLK_OPEN_READ, NULL, NULL);
if (IS_ERR(bdev_handle))
bdev_file = bdev_file_open_by_path(strim(path), BLK_OPEN_READ, NULL, NULL);
if (IS_ERR(bdev_file))
goto out_free_sb;
err = "failed to set blocksize";
if (set_blocksize(bdev_handle->bdev, 4096))
if (set_blocksize(file_bdev(bdev_file), 4096))
goto out_blkdev_put;
err = read_super(sb, bdev_handle->bdev, &sb_disk);
err = read_super(sb, file_bdev(bdev_file), &sb_disk);
if (err)
goto out_blkdev_put;
@ -2569,13 +2569,13 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
}
/* Now reopen in exclusive mode with proper holder */
bdev_handle2 = bdev_open_by_dev(bdev_handle->bdev->bd_dev,
bdev_file2 = bdev_file_open_by_dev(file_bdev(bdev_file)->bd_dev,
BLK_OPEN_READ | BLK_OPEN_WRITE, holder, NULL);
bdev_release(bdev_handle);
bdev_handle = bdev_handle2;
if (IS_ERR(bdev_handle)) {
ret = PTR_ERR(bdev_handle);
bdev_handle = NULL;
fput(bdev_file);
bdev_file = bdev_file2;
if (IS_ERR(bdev_file)) {
ret = PTR_ERR(bdev_file);
bdev_file = NULL;
if (ret == -EBUSY) {
dev_t dev;
@ -2610,7 +2610,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
args->path = path;
args->sb = sb;
args->sb_disk = sb_disk;
args->bdev_handle = bdev_handle;
args->bdev_file = bdev_file;
args->holder = holder;
register_device_async(args);
/* No wait and returns to user space */
@ -2619,14 +2619,14 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
if (SB_IS_BDEV(sb)) {
mutex_lock(&bch_register_lock);
ret = register_bdev(sb, sb_disk, bdev_handle, holder);
ret = register_bdev(sb, sb_disk, bdev_file, holder);
mutex_unlock(&bch_register_lock);
/* blkdev_put() will be called in cached_dev_free() */
if (ret < 0)
goto out_free_sb;
} else {
/* blkdev_put() will be called in bch_cache_release() */
ret = register_cache(sb, sb_disk, bdev_handle, holder);
ret = register_cache(sb, sb_disk, bdev_file, holder);
if (ret)
goto out_free_sb;
}
@ -2642,8 +2642,8 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
out_put_sb_page:
put_page(virt_to_page(sb_disk));
out_blkdev_put:
if (bdev_handle)
bdev_release(bdev_handle);
if (bdev_file)
fput(bdev_file);
out_free_sb:
kfree(sb);
out_free_path: