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Revert "loop: support 4k physical blocksize" 

There's some stuff still up in the air, let's not get stuck with a
subpar ABI. I'll follow up with something better for 4.14.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Omar Sandoval 2017-08-23 14:54:59 -07:00 committed by Jens Axboe
parent ea0ea2bc6d
commit 1e6ec9ea89
3 changed files with 6 additions and 40 deletions
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42
drivers/block/loop.c
View File

@ -221,8 +221,7 @@ static void __loop_update_dio(struct loop_device *lo, bool dio)
}
static int
figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit,
loff_t logical_blocksize)
figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit)
{
loff_t size = get_size(offset, sizelimit, lo->lo_backing_file);
sector_t x = (sector_t)size;
@ -234,12 +233,6 @@ figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit,
lo->lo_offset = offset;
if (lo->lo_sizelimit != sizelimit)
lo->lo_sizelimit = sizelimit;
if (lo->lo_flags & LO_FLAGS_BLOCKSIZE) {
lo->lo_logical_blocksize = logical_blocksize;
blk_queue_physical_block_size(lo->lo_queue, lo->lo_blocksize);
blk_queue_logical_block_size(lo->lo_queue,
lo->lo_logical_blocksize);
}
set_capacity(lo->lo_disk, x);
bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9);
/* let user-space know about the new size */
@ -820,7 +813,6 @@ static void loop_config_discard(struct loop_device *lo)
struct file *file = lo->lo_backing_file;
struct inode *inode = file->f_mapping->host;
struct request_queue *q = lo->lo_queue;
int lo_bits = 9;
/*
* We use punch hole to reclaim the free space used by the
@ -840,11 +832,9 @@ static void loop_config_discard(struct loop_device *lo)
q->limits.discard_granularity = inode->i_sb->s_blocksize;
q->limits.discard_alignment = 0;
if (lo->lo_flags & LO_FLAGS_BLOCKSIZE)
lo_bits = blksize_bits(lo->lo_logical_blocksize);
blk_queue_max_discard_sectors(q, UINT_MAX >> lo_bits);
blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> lo_bits);
blk_queue_max_discard_sectors(q, UINT_MAX >> 9);
blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> 9);
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
}
@ -938,7 +928,6 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
lo->use_dio = false;
lo->lo_blocksize = lo_blocksize;
lo->lo_logical_blocksize = 512;
lo->lo_device = bdev;
lo->lo_flags = lo_flags;
lo->lo_backing_file = file;
@ -1104,7 +1093,6 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
int err;
struct loop_func_table *xfer;
kuid_t uid = current_uid();
int lo_flags = lo->lo_flags;
if (lo->lo_encrypt_key_size &&
!uid_eq(lo->lo_key_owner, uid) &&
@ -1137,26 +1125,9 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
if (err)
goto exit;
if (info->lo_flags & LO_FLAGS_BLOCKSIZE) {
if (!(lo->lo_flags & LO_FLAGS_BLOCKSIZE))
lo->lo_logical_blocksize = 512;
lo->lo_flags |= LO_FLAGS_BLOCKSIZE;
if (LO_INFO_BLOCKSIZE(info) != 512 &&
LO_INFO_BLOCKSIZE(info) != 1024 &&
LO_INFO_BLOCKSIZE(info) != 2048 &&
LO_INFO_BLOCKSIZE(info) != 4096)
return -EINVAL;
if (LO_INFO_BLOCKSIZE(info) > lo->lo_blocksize)
return -EINVAL;
}
if (lo->lo_offset != info->lo_offset ||
lo->lo_sizelimit != info->lo_sizelimit ||
lo->lo_flags != lo_flags ||
((lo->lo_flags & LO_FLAGS_BLOCKSIZE) &&
lo->lo_logical_blocksize != LO_INFO_BLOCKSIZE(info))) {
if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit,
LO_INFO_BLOCKSIZE(info))) {
lo->lo_sizelimit != info->lo_sizelimit) {
if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) {
err = -EFBIG;
goto exit;
}
@ -1348,8 +1319,7 @@ static int loop_set_capacity(struct loop_device *lo)
if (unlikely(lo->lo_state != Lo_bound))
return -ENXIO;
return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit,
lo->lo_logical_blocksize);
return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit);
}
static int loop_set_dio(struct loop_device *lo, unsigned long arg)

1
drivers/block/loop.h
View File

@ -49,7 +49,6 @@ struct loop_device {
struct file * lo_backing_file;
struct block_device *lo_device;
unsigned lo_blocksize;
unsigned lo_logical_blocksize;
void *key_data;
gfp_t old_gfp_mask;

3
include/uapi/linux/loop.h
View File

@ -22,7 +22,6 @@ enum {
LO_FLAGS_AUTOCLEAR = 4,
LO_FLAGS_PARTSCAN = 8,
LO_FLAGS_DIRECT_IO = 16,
LO_FLAGS_BLOCKSIZE = 32,
};
#include <asm/posix_types.h> /* for __kernel_old_dev_t */
@ -60,8 +59,6 @@ struct loop_info64 {
__u64 lo_init[2];
};
#define LO_INFO_BLOCKSIZE(l) (l)->lo_init[0]
/*
* Loop filter types
*/