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ext4: port block device access to file 

Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-21-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 14:26:38 +01:00
parent 87b355f448
commit 61ead71476
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
3 changed files with 31 additions and 31 deletions
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2
fs/ext4/ext4.h
View File

@ -1548,7 +1548,7 @@ struct ext4_sb_info {
unsigned long s_commit_interval;
u32 s_max_batch_time;
u32 s_min_batch_time;
struct bdev_handle *s_journal_bdev_handle;
struct file *s_journal_bdev_file;
#ifdef CONFIG_QUOTA
/* Names of quota files with journalled quota */
char __rcu *s_qf_names[EXT4_MAXQUOTAS];

8
fs/ext4/fsmap.c
View File

@ -576,9 +576,9 @@ static bool ext4_getfsmap_is_valid_device(struct super_block *sb,
if (fm->fmr_device == 0 || fm->fmr_device == UINT_MAX ||
fm->fmr_device == new_encode_dev(sb->s_bdev->bd_dev))
return true;
if (EXT4_SB(sb)->s_journal_bdev_handle &&
if (EXT4_SB(sb)->s_journal_bdev_file &&
fm->fmr_device ==
new_encode_dev(EXT4_SB(sb)->s_journal_bdev_handle->bdev->bd_dev))
new_encode_dev(file_bdev(EXT4_SB(sb)->s_journal_bdev_file)->bd_dev))
return true;
return false;
}
@ -648,9 +648,9 @@ int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head,
memset(handlers, 0, sizeof(handlers));
handlers[0].gfd_dev = new_encode_dev(sb->s_bdev->bd_dev);
handlers[0].gfd_fn = ext4_getfsmap_datadev;
if (EXT4_SB(sb)->s_journal_bdev_handle) {
if (EXT4_SB(sb)->s_journal_bdev_file) {
handlers[1].gfd_dev = new_encode_dev(
EXT4_SB(sb)->s_journal_bdev_handle->bdev->bd_dev);
file_bdev(EXT4_SB(sb)->s_journal_bdev_file)->bd_dev);
handlers[1].gfd_fn = ext4_getfsmap_logdev;
}

52
fs/ext4/super.c
View File

@ -1359,14 +1359,14 @@ static void ext4_put_super(struct super_block *sb)
sync_blockdev(sb->s_bdev);
invalidate_bdev(sb->s_bdev);
if (sbi->s_journal_bdev_handle) {
if (sbi->s_journal_bdev_file) {
/*
* Invalidate the journal device's buffers. We don't want them
* floating about in memory - the physical journal device may
* hotswapped, and it breaks the `ro-after' testing code.
*/
sync_blockdev(sbi->s_journal_bdev_handle->bdev);
invalidate_bdev(sbi->s_journal_bdev_handle->bdev);
sync_blockdev(file_bdev(sbi->s_journal_bdev_file));
invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));
}
ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
@ -4233,7 +4233,7 @@ int ext4_calculate_overhead(struct super_block *sb)
* Add the internal journal blocks whether the journal has been
* loaded or not
*/
if (sbi->s_journal && !sbi->s_journal_bdev_handle)
if (sbi->s_journal && !sbi->s_journal_bdev_file)
overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len);
else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {
/* j_inum for internal journal is non-zero */
@ -5670,9 +5670,9 @@ failed_mount:
#endif
fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);
brelse(sbi->s_sbh);
if (sbi->s_journal_bdev_handle) {
invalidate_bdev(sbi->s_journal_bdev_handle->bdev);
bdev_release(sbi->s_journal_bdev_handle);
if (sbi->s_journal_bdev_file) {
invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));
fput(sbi->s_journal_bdev_file);
}
out_fail:
invalidate_bdev(sb->s_bdev);
@ -5842,30 +5842,30 @@ static journal_t *ext4_open_inode_journal(struct super_block *sb,
return journal;
}
static struct bdev_handle *ext4_get_journal_blkdev(struct super_block *sb,
static struct file *ext4_get_journal_blkdev(struct super_block *sb,
dev_t j_dev, ext4_fsblk_t *j_start,
ext4_fsblk_t *j_len)
{
struct buffer_head *bh;
struct block_device *bdev;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
int hblock, blocksize;
ext4_fsblk_t sb_block;
unsigned long offset;
struct ext4_super_block *es;
int errno;
bdev_handle = bdev_open_by_dev(j_dev,
bdev_file = bdev_file_open_by_dev(j_dev,
BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES,
sb, &fs_holder_ops);
if (IS_ERR(bdev_handle)) {
if (IS_ERR(bdev_file)) {
ext4_msg(sb, KERN_ERR,
"failed to open journal device unknown-block(%u,%u) %ld",
MAJOR(j_dev), MINOR(j_dev), PTR_ERR(bdev_handle));
return bdev_handle;
MAJOR(j_dev), MINOR(j_dev), PTR_ERR(bdev_file));
return bdev_file;
}
bdev = bdev_handle->bdev;
bdev = file_bdev(bdev_file);
blocksize = sb->s_blocksize;
hblock = bdev_logical_block_size(bdev);
if (blocksize < hblock) {
@ -5912,12 +5912,12 @@ static struct bdev_handle *ext4_get_journal_blkdev(struct super_block *sb,
*j_start = sb_block + 1;
*j_len = ext4_blocks_count(es);
brelse(bh);
return bdev_handle;
return bdev_file;
out_bh:
brelse(bh);
out_bdev:
bdev_release(bdev_handle);
fput(bdev_file);
return ERR_PTR(errno);
}
@ -5927,14 +5927,14 @@ static journal_t *ext4_open_dev_journal(struct super_block *sb,
journal_t *journal;
ext4_fsblk_t j_start;
ext4_fsblk_t j_len;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
int errno = 0;
bdev_handle = ext4_get_journal_blkdev(sb, j_dev, &j_start, &j_len);
if (IS_ERR(bdev_handle))
return ERR_CAST(bdev_handle);
bdev_file = ext4_get_journal_blkdev(sb, j_dev, &j_start, &j_len);
if (IS_ERR(bdev_file))
return ERR_CAST(bdev_file);
journal = jbd2_journal_init_dev(bdev_handle->bdev, sb->s_bdev, j_start,
journal = jbd2_journal_init_dev(file_bdev(bdev_file), sb->s_bdev, j_start,
j_len, sb->s_blocksize);
if (IS_ERR(journal)) {
ext4_msg(sb, KERN_ERR, "failed to create device journal");
@ -5949,14 +5949,14 @@ static journal_t *ext4_open_dev_journal(struct super_block *sb,
goto out_journal;
}
journal->j_private = sb;
EXT4_SB(sb)->s_journal_bdev_handle = bdev_handle;
EXT4_SB(sb)->s_journal_bdev_file = bdev_file;
ext4_init_journal_params(sb, journal);
return journal;
out_journal:
jbd2_journal_destroy(journal);
out_bdev:
bdev_release(bdev_handle);
fput(bdev_file);
return ERR_PTR(errno);
}
@ -7314,12 +7314,12 @@ static inline int ext3_feature_set_ok(struct super_block *sb)
static void ext4_kill_sb(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct bdev_handle *handle = sbi ? sbi->s_journal_bdev_handle : NULL;
struct file *bdev_file = sbi ? sbi->s_journal_bdev_file : NULL;
kill_block_super(sb);
if (handle)
bdev_release(handle);
if (bdev_file)
fput(bdev_file);
}
static struct file_system_type ext4_fs_type = {