[RFC,09/34] pktcdvd: port block device access to file

Message ID	20240103-vfs-bdev-file-v1-9-6c8ee55fb6ef@kernel.org (mailing list archive)
State	New, archived
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD3DC1A5A6; Wed, 3 Jan 2024 12:55:47 +0000 (UTC) From: Christian Brauner <brauner@kernel.org> Date: Wed, 03 Jan 2024 13:55:07 +0100 Subject: [PATCH RFC 09/34] pktcdvd: port block device access to file Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20240103-vfs-bdev-file-v1-9-6c8ee55fb6ef@kernel.org> References: <20240103-vfs-bdev-file-v1-0-6c8ee55fb6ef@kernel.org> In-Reply-To: <20240103-vfs-bdev-file-v1-0-6c8ee55fb6ef@kernel.org> To: Jan Kara <jack@suse.cz>, Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk> Cc: "Darrick J. Wong" <djwong@kernel.org>, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, Christian Brauner <brauner@kernel.org>
Series	Open block devices as files & a bd_inode proposal \| expand [RFC,00/34] Open block devices as files & a bd_inode proposal [RFC,01/34] bdev: open block device as files [RFC,02/34] block/ioctl: port blkdev_bszset() to file [RFC,03/34] block/genhd: port disk_scan_partitions() to file [RFC,04/34] md: port block device access to file [RFC,05/34] swap: port block device usage to file [RFC,06/34] power: port block device access to file [RFC,07/34] xfs: port block device access to files [RFC,08/34] drbd: port block device access to file [RFC,09/34] pktcdvd: port block device access to file [RFC,10/34] rnbd: port block device access to file [RFC,11/34] xen: port block device access to file [RFC,12/34] zram: port block device access to file [RFC,13/34] bcache: port block device access to files [RFC,14/34] block2mtd: port device access to files [RFC,15/34] nvme: port block device access to file [RFC,16/34] s390: port block device access to file [RFC,17/34] target: port block device access to file [RFC,18/34] bcachefs: port block device access to file [RFC,19/34] btrfs: port device access to file [RFC,20/34] erofs: port device access to file [RFC,21/34] ext4: port block device access to file [RFC,22/34] f2fs: port block device access to files [RFC,23/34] jfs: port block device access to file [RFC,24/34] nfs: port block device access to files [RFC,25/34] ocfs2: port block device access to file [RFC,26/34] reiserfs: port block device access to file [RFC,27/34] bdev: remove bdev_open_by_path() [RFC,28/34] bdev: make bdev_release() private to block layer [RFC,29/34] bdev: make struct bdev_handle private to the block layer [RFC,30/34] bdev: rework bdev_open_by_dev() [RFC,31/34] ext4: rely on sb->f_bdev only [RFC,32/34] block: expose bdev_file_inode() [RFC,33/34] ext4: use bdev_file_inode() [DRAFT,RFC,34/34] buffer: port block device access to files and get rid of bd_inode access

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index d56d972aadb3..02ab52e55229 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -340,8 +340,8 @@ static ssize_t device_map_show(const struct class *c, const struct class_attribu n += sysfs_emit_at(data, n, "%s %u:%u %u:%u\n", pd->disk->disk_name, MAJOR(pd->pkt_dev), MINOR(pd->pkt_dev), - MAJOR(pd->bdev_handle->bdev->bd_dev), - MINOR(pd->bdev_handle->bdev->bd_dev)); + MAJOR(F_BDEV(pd->f_bdev)->bd_dev), + MINOR(F_BDEV(pd->f_bdev)->bd_dev)); } mutex_unlock(&ctl_mutex); return n; @@ -438,7 +438,7 @@ static int pkt_seq_show(struct seq_file *m, void *p) int states[PACKET_NUM_STATES]; seq_printf(m, "Writer %s mapped to %pg:\n", pd->disk->disk_name, - pd->bdev_handle->bdev); + F_BDEV(pd->f_bdev)); seq_printf(m, "\nSettings:\n"); seq_printf(m, "\tpacket size:\t\t%dkB\n", pd->settings.size / 2); @@ -715,7 +715,7 @@ static void pkt_rbtree_insert(struct pktcdvd_device *pd, struct pkt_rb_node *nod */ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc) { - struct request_queue *q = bdev_get_queue(pd->bdev_handle->bdev); + struct request_queue *q = bdev_get_queue(F_BDEV(pd->f_bdev)); struct scsi_cmnd *scmd; struct request *rq; int ret = 0; @@ -1048,7 +1048,7 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt) continue; bio = pkt->r_bios[f]; - bio_init(bio, pd->bdev_handle->bdev, bio->bi_inline_vecs, 1, + bio_init(bio, F_BDEV(pd->f_bdev), bio->bi_inline_vecs, 1, REQ_OP_READ); bio->bi_iter.bi_sector = pkt->sector + f * (CD_FRAMESIZE >> 9); bio->bi_end_io = pkt_end_io_read; @@ -1264,7 +1264,7 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt) struct device *ddev = disk_to_dev(pd->disk); int f; - bio_init(pkt->w_bio, pd->bdev_handle->bdev, pkt->w_bio->bi_inline_vecs, + bio_init(pkt->w_bio, F_BDEV(pd->f_bdev), pkt->w_bio->bi_inline_vecs, pkt->frames, REQ_OP_WRITE); pkt->w_bio->bi_iter.bi_sector = pkt->sector; pkt->w_bio->bi_end_io = pkt_end_io_packet_write; @@ -2162,20 +2162,20 @@ static int pkt_open_dev(struct pktcdvd_device *pd, bool write) int ret; long lba; struct request_queue *q; - struct bdev_handle *bdev_handle; + struct file *f_bdev; /* * We need to re-open the cdrom device without O_NONBLOCK to be able * to read/write from/to it. It is already opened in O_NONBLOCK mode * so open should not fail. */ - bdev_handle = bdev_open_by_dev(pd->bdev_handle->bdev->bd_dev, + f_bdev = bdev_file_open_by_dev(F_BDEV(pd->f_bdev)->bd_dev, BLK_OPEN_READ, pd, NULL); - if (IS_ERR(bdev_handle)) { - ret = PTR_ERR(bdev_handle); + if (IS_ERR(f_bdev)) { + ret = PTR_ERR(f_bdev); goto out; } - pd->open_bdev_handle = bdev_handle; + pd->f_open_bdev = f_bdev; ret = pkt_get_last_written(pd, &lba); if (ret) { @@ -2184,9 +2184,9 @@ static int pkt_open_dev(struct pktcdvd_device *pd, bool write) } set_capacity(pd->disk, lba << 2); - set_capacity_and_notify(pd->bdev_handle->bdev->bd_disk, lba << 2); + set_capacity_and_notify(F_BDEV(pd->f_bdev)->bd_disk, lba << 2); - q = bdev_get_queue(pd->bdev_handle->bdev); + q = bdev_get_queue(F_BDEV(pd->f_bdev)); if (write) { ret = pkt_open_write(pd); if (ret) @@ -2218,7 +2218,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, bool write) return 0; out_putdev: - bdev_release(bdev_handle); + fput(f_bdev); out: return ret; } @@ -2237,8 +2237,8 @@ static void pkt_release_dev(struct pktcdvd_device *pd, int flush) pkt_lock_door(pd, 0); pkt_set_speed(pd, MAX_SPEED, MAX_SPEED); - bdev_release(pd->open_bdev_handle); - pd->open_bdev_handle = NULL; + fput(pd->f_open_bdev); + pd->f_open_bdev = NULL; pkt_shrink_pktlist(pd); } @@ -2326,7 +2326,7 @@ static void pkt_end_io_read_cloned(struct bio *bio) static void pkt_make_request_read(struct pktcdvd_device *pd, struct bio *bio) { - struct bio *cloned_bio = bio_alloc_clone(pd->bdev_handle->bdev, bio, + struct bio *cloned_bio = bio_alloc_clone(F_BDEV(pd->f_bdev), bio, GFP_NOIO, &pkt_bio_set); struct packet_stacked_data *psd = mempool_alloc(&psd_pool, GFP_NOIO); @@ -2497,7 +2497,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) { struct device *ddev = disk_to_dev(pd->disk); int i; - struct bdev_handle *bdev_handle; + struct file *f_bdev; struct scsi_device *sdev; if (pd->pkt_dev == dev) { @@ -2508,9 +2508,9 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) struct pktcdvd_device *pd2 = pkt_devs[i]; if (!pd2) continue; - if (pd2->bdev_handle->bdev->bd_dev == dev) { + if (F_BDEV(pd2->f_bdev)->bd_dev == dev) { dev_err(ddev, "%pg already setup\n", - pd2->bdev_handle->bdev); + F_BDEV(pd2->f_bdev)); return -EBUSY; } if (pd2->pkt_dev == dev) { @@ -2519,13 +2519,13 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) } } - bdev_handle = bdev_open_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_NDELAY, + f_bdev = bdev_file_open_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_NDELAY, NULL, NULL); - if (IS_ERR(bdev_handle)) - return PTR_ERR(bdev_handle); - sdev = scsi_device_from_queue(bdev_handle->bdev->bd_disk->queue); + if (IS_ERR(f_bdev)) + return PTR_ERR(f_bdev); + sdev = scsi_device_from_queue(F_BDEV(f_bdev)->bd_disk->queue); if (!sdev) { - bdev_release(bdev_handle); + fput(f_bdev); return -EINVAL; } put_device(&sdev->sdev_gendev); @@ -2533,8 +2533,8 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) /* This is safe, since we have a reference from open(). */ __module_get(THIS_MODULE); - pd->bdev_handle = bdev_handle; - set_blocksize(bdev_handle->bdev, CD_FRAMESIZE); + pd->f_bdev = f_bdev; + set_blocksize(F_BDEV(f_bdev), CD_FRAMESIZE); pkt_init_queue(pd); @@ -2546,11 +2546,11 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) } proc_create_single_data(pd->disk->disk_name, 0, pkt_proc, pkt_seq_show, pd); - dev_notice(ddev, "writer mapped to %pg\n", bdev_handle->bdev); + dev_notice(ddev, "writer mapped to %pg\n", F_BDEV(f_bdev)); return 0; out_mem: - bdev_release(bdev_handle); + fput(f_bdev); /* This is safe: open() is still holding a reference. */ module_put(THIS_MODULE); return -ENOMEM; @@ -2605,9 +2605,9 @@ static unsigned int pkt_check_events(struct gendisk *disk, if (!pd) return 0; - if (!pd->bdev_handle) + if (!pd->f_bdev) return 0; - attached_disk = pd->bdev_handle->bdev->bd_disk; + attached_disk = F_BDEV(pd->f_bdev)->bd_disk; if (!attached_disk || !attached_disk->fops->check_events) return 0; return attached_disk->fops->check_events(attached_disk, clearing); @@ -2692,7 +2692,7 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev) goto out_mem2; /* inherit events of the host device */ - disk->events = pd->bdev_handle->bdev->bd_disk->events; + disk->events = F_BDEV(pd->f_bdev)->bd_disk->events; ret = add_disk(disk); if (ret) @@ -2757,7 +2757,7 @@ static int pkt_remove_dev(dev_t pkt_dev) pkt_debugfs_dev_remove(pd); pkt_sysfs_dev_remove(pd); - bdev_release(pd->bdev_handle); + fput(pd->f_bdev); remove_proc_entry(pd->disk->disk_name, pkt_proc); dev_notice(ddev, "writer unmapped\n"); @@ -2784,7 +2784,7 @@ static void pkt_get_status(struct pkt_ctrl_command *ctrl_cmd) pd = pkt_find_dev_from_minor(ctrl_cmd->dev_index); if (pd) { - ctrl_cmd->dev = new_encode_dev(pd->bdev_handle->bdev->bd_dev); + ctrl_cmd->dev = new_encode_dev(F_BDEV(pd->f_bdev)->bd_dev); ctrl_cmd->pkt_dev = new_encode_dev(pd->pkt_dev); } else { ctrl_cmd->dev = 0; diff --git a/include/linux/pktcdvd.h b/include/linux/pktcdvd.h index 79594aeb160d..e202ec04b7e0 100644 --- a/include/linux/pktcdvd.h +++ b/include/linux/pktcdvd.h @@ -154,9 +154,9 @@ struct packet_stacked_data struct pktcdvd_device { - struct bdev_handle *bdev_handle; /* dev attached */ + struct file *f_bdev; /* dev attached */ /* handle acquired for bdev during pkt_open_dev() */ - struct bdev_handle *open_bdev_handle; + struct file *f_open_bdev; dev_t pkt_dev; /* our dev */ struct packet_settings settings; struct packet_stats stats;

[RFC,09/34] pktcdvd: port block device access to file

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