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xfs: port block device access to files

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Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-7-adbd023e19cc@kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
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 14:26:24 +01:00
parent 4379f91172
commit 1b9e2d9014
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
3 changed files with 29 additions and 29 deletions
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10
fs/xfs/xfs_buf.c
View File

@ -1951,7 +1951,7 @@ xfs_free_buftarg(
fs_put_dax(btp->bt_daxdev, btp->bt_mount);
/* the main block device is closed by kill_block_super */
if (btp->bt_bdev != btp->bt_mount->m_super->s_bdev)
bdev_release(btp->bt_bdev_handle);
fput(btp->bt_bdev_file);
kmem_free(btp);
}
@ -1994,7 +1994,7 @@ xfs_setsize_buftarg_early(
struct xfs_buftarg *
xfs_alloc_buftarg(
struct xfs_mount *mp,
struct bdev_handle *bdev_handle)
struct file *bdev_file)
{
xfs_buftarg_t *btp;
const struct dax_holder_operations *ops = NULL;
@ -2005,9 +2005,9 @@ xfs_alloc_buftarg(
btp = kmem_zalloc(sizeof(*btp), KM_NOFS);
btp->bt_mount = mp;
btp->bt_bdev_handle = bdev_handle;
btp->bt_dev = bdev_handle->bdev->bd_dev;
btp->bt_bdev = bdev_handle->bdev;
btp->bt_bdev_file = bdev_file;
btp->bt_bdev = file_bdev(bdev_file);
btp->bt_dev = btp->bt_bdev->bd_dev;
btp->bt_daxdev = fs_dax_get_by_bdev(btp->bt_bdev, &btp->bt_dax_part_off,
mp, ops);

4
fs/xfs/xfs_buf.h
View File

@ -98,7 +98,7 @@ typedef unsigned int xfs_buf_flags_t;
*/
typedef struct xfs_buftarg {
dev_t bt_dev;
struct bdev_handle *bt_bdev_handle;
struct file *bt_bdev_file;
struct block_device *bt_bdev;
struct dax_device *bt_daxdev;
u64 bt_dax_part_off;
@ -366,7 +366,7 @@ xfs_buf_update_cksum(struct xfs_buf *bp, unsigned long cksum_offset)
* Handling of buftargs.
*/
struct xfs_buftarg *xfs_alloc_buftarg(struct xfs_mount *mp,
struct bdev_handle *bdev_handle);
struct file *bdev_file);
extern void xfs_free_buftarg(struct xfs_buftarg *);
extern void xfs_buftarg_wait(struct xfs_buftarg *);
extern void xfs_buftarg_drain(struct xfs_buftarg *);

44
fs/xfs/xfs_super.c
View File

@ -362,16 +362,16 @@ STATIC int
xfs_blkdev_get(
xfs_mount_t *mp,
const char *name,
struct bdev_handle **handlep)
struct file **bdev_filep)
{
int error = 0;
*handlep = bdev_open_by_path(name,
*bdev_filep = bdev_file_open_by_path(name,
BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES,
mp->m_super, &fs_holder_ops);
if (IS_ERR(*handlep)) {
error = PTR_ERR(*handlep);
*handlep = NULL;
if (IS_ERR(*bdev_filep)) {
error = PTR_ERR(*bdev_filep);
*bdev_filep = NULL;
xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
}
@ -436,26 +436,26 @@ xfs_open_devices(
{
struct super_block *sb = mp->m_super;
struct block_device *ddev = sb->s_bdev;
struct bdev_handle *logdev_handle = NULL, *rtdev_handle = NULL;
struct file *logdev_file = NULL, *rtdev_file = NULL;
int error;
/*
* Open real time and log devices - order is important.
*/
if (mp->m_logname) {
error = xfs_blkdev_get(mp, mp->m_logname, &logdev_handle);
error = xfs_blkdev_get(mp, mp->m_logname, &logdev_file);
if (error)
return error;
}
if (mp->m_rtname) {
error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev_handle);
error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev_file);
if (error)
goto out_close_logdev;
if (rtdev_handle->bdev == ddev ||
(logdev_handle &&
rtdev_handle->bdev == logdev_handle->bdev)) {
if (file_bdev(rtdev_file) == ddev ||
(logdev_file &&
file_bdev(rtdev_file) == file_bdev(logdev_file))) {
xfs_warn(mp,
"Cannot mount filesystem with identical rtdev and ddev/logdev.");
error = -EINVAL;
@ -467,25 +467,25 @@ xfs_open_devices(
* Setup xfs_mount buffer target pointers
*/
error = -ENOMEM;
mp->m_ddev_targp = xfs_alloc_buftarg(mp, sb_bdev_handle(sb));
mp->m_ddev_targp = xfs_alloc_buftarg(mp, sb->s_bdev_file);
if (!mp->m_ddev_targp)
goto out_close_rtdev;
if (rtdev_handle) {
mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev_handle);
if (rtdev_file) {
mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev_file);
if (!mp->m_rtdev_targp)
goto out_free_ddev_targ;
}
if (logdev_handle && logdev_handle->bdev != ddev) {
mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev_handle);
if (logdev_file && file_bdev(logdev_file) != ddev) {
mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev_file);
if (!mp->m_logdev_targp)
goto out_free_rtdev_targ;
} else {
mp->m_logdev_targp = mp->m_ddev_targp;
/* Handle won't be used, drop it */
if (logdev_handle)
bdev_release(logdev_handle);
if (logdev_file)
fput(logdev_file);
}
return 0;
@ -496,11 +496,11 @@ xfs_open_devices(
out_free_ddev_targ:
xfs_free_buftarg(mp->m_ddev_targp);
out_close_rtdev:
if (rtdev_handle)
bdev_release(rtdev_handle);
if (rtdev_file)
fput(rtdev_file);
out_close_logdev:
if (logdev_handle)
bdev_release(logdev_handle);
if (logdev_file)
fput(logdev_file);
return error;
}