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dm: remove fmode_t argument from .prepare_ioctl hook 

Use the fmode_t that is passed to dm_blk_ioctl() rather than
inconsistently (varies across targets) drop it on the floor by
overriding it with the fmode_t stored in 'struct dm_dev'.

All the persistent reservation functions weren't using the fmode_t they
got back from .prepare_ioctl so remove them.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2018-04-03 16:54:10 -04:00
parent 971888c469
commit 5bd5e8d891
9 changed files with 15 additions and 27 deletions
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3
drivers/md/dm-flakey.c
View File

@ -442,8 +442,7 @@ static void flakey_status(struct dm_target *ti, status_type_t type,
}
}
static int flakey_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
static int flakey_prepare_ioctl(struct dm_target *ti, struct block_device **bdev)
{
struct flakey_c *fc = ti->private;

3
drivers/md/dm-linear.c
View File

@ -130,8 +130,7 @@ static void linear_status(struct dm_target *ti, status_type_t type,
}
}
static int linear_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev)
{
struct linear_c *lc = (struct linear_c *) ti->private;
struct dm_dev *dev = lc->dev;

2
drivers/md/dm-log-writes.c
View File

@ -864,7 +864,7 @@ static void log_writes_status(struct dm_target *ti, status_type_t type,
}
static int log_writes_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
struct block_device **bdev)
{
struct log_writes_c *lc = ti->private;
struct dm_dev *dev = lc->dev;

3
drivers/md/dm-mpath.c
View File

@ -1876,7 +1876,7 @@ out:
}
static int multipath_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
struct block_device **bdev)
{
struct multipath *m = ti->private;
struct pgpath *current_pgpath;
@ -1889,7 +1889,6 @@ static int multipath_prepare_ioctl(struct dm_target *ti,
if (current_pgpath) {
if (!test_bit(MPATHF_QUEUE_IO, &m->flags)) {
*bdev = current_pgpath->path.dev->bdev;
*mode = current_pgpath->path.dev->mode;
r = 0;
} else {
/* pg_init has not started or completed */

4
drivers/md/dm-switch.c
View File

@ -512,8 +512,7 @@ static void switch_status(struct dm_target *ti, status_type_t type,
*
* Passthrough all ioctls to the path for sector 0
*/
static int switch_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
static int switch_prepare_ioctl(struct dm_target *ti, struct block_device **bdev)
{
struct switch_ctx *sctx = ti->private;
unsigned path_nr;
@ -521,7 +520,6 @@ static int switch_prepare_ioctl(struct dm_target *ti,
path_nr = switch_get_path_nr(sctx, 0);
*bdev = sctx->path_list[path_nr].dmdev->bdev;
*mode = sctx->path_list[path_nr].dmdev->mode;
/*
* Only pass ioctls through if the device sizes match exactly.

3
drivers/md/dm-verity-target.c
View File

@ -723,8 +723,7 @@ static void verity_status(struct dm_target *ti, status_type_t type,
}
}
static int verity_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
static int verity_prepare_ioctl(struct dm_target *ti, struct block_device **bdev)
{
struct dm_verity *v = ti->private;

3
drivers/md/dm-zoned-target.c
View File

@ -898,8 +898,7 @@ static void dmz_io_hints(struct dm_target *ti, struct queue_limits *limits)
/*
* Pass on ioctl to the backend device.
*/
static int dmz_prepare_ioctl(struct dm_target *ti,
struct block_device **bdev, fmode_t *mode)
static int dmz_prepare_ioctl(struct dm_target *ti, struct block_device **bdev)
{
struct dmz_target *dmz = ti->private;

18
drivers/md/dm.c
View File

@ -459,7 +459,7 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
}
static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx,
struct block_device **bdev, fmode_t *mode)
struct block_device **bdev)
__acquires(md->io_barrier)
{
struct dm_target *tgt;
@ -483,7 +483,7 @@ retry:
if (dm_suspended_md(md))
return -EAGAIN;
r = tgt->type->prepare_ioctl(tgt, bdev, mode);
r = tgt->type->prepare_ioctl(tgt, bdev);
if (r == -ENOTCONN && !fatal_signal_pending(current)) {
dm_put_live_table(md, *srcu_idx);
msleep(10);
@ -505,7 +505,7 @@ static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
struct mapped_device *md = bdev->bd_disk->private_data;
int r, srcu_idx;
r = dm_prepare_ioctl(md, &srcu_idx, &bdev, &mode);
r = dm_prepare_ioctl(md, &srcu_idx, &bdev);
if (r < 0)
goto out;
@ -3034,10 +3034,9 @@ static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
{
struct mapped_device *md = bdev->bd_disk->private_data;
const struct pr_ops *ops;
fmode_t mode;
int r, srcu_idx;
r = dm_prepare_ioctl(md, &srcu_idx, &bdev, &mode);
r = dm_prepare_ioctl(md, &srcu_idx, &bdev);
if (r < 0)
goto out;
@ -3055,10 +3054,9 @@ static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
{
struct mapped_device *md = bdev->bd_disk->private_data;
const struct pr_ops *ops;
fmode_t mode;
int r, srcu_idx;
r = dm_prepare_ioctl(md, &srcu_idx, &bdev, &mode);
r = dm_prepare_ioctl(md, &srcu_idx, &bdev);
if (r < 0)
goto out;
@ -3077,10 +3075,9 @@ static int dm_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
{
struct mapped_device *md = bdev->bd_disk->private_data;
const struct pr_ops *ops;
fmode_t mode;
int r, srcu_idx;
r = dm_prepare_ioctl(md, &srcu_idx, &bdev, &mode);
r = dm_prepare_ioctl(md, &srcu_idx, &bdev);
if (r < 0)
goto out;
@ -3098,10 +3095,9 @@ static int dm_pr_clear(struct block_device *bdev, u64 key)
{
struct mapped_device *md = bdev->bd_disk->private_data;
const struct pr_ops *ops;
fmode_t mode;
int r, srcu_idx;
r = dm_prepare_ioctl(md, &srcu_idx, &bdev, &mode);
r = dm_prepare_ioctl(md, &srcu_idx, &bdev);
if (r < 0)
goto out;

3
include/linux/device-mapper.h
View File

@ -90,8 +90,7 @@ typedef void (*dm_status_fn) (struct dm_target *ti, status_type_t status_type,
typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv,
char *result, unsigned maxlen);
typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti,
struct block_device **bdev, fmode_t *mode);
typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev);
/*
* These iteration functions are typically used to check (and combine)