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ksmbd: set fixed sector size to FS_SECTOR_SIZE_INFORMATION 

Currently ksmbd is using ->f_bsize from vfs_statfs() as sector size.
If fat/exfat is a local share, ->f_bsize is a cluster size that is too
large to be used as a sector size. Sector sizes larger than 4K cause
problem occurs when mounting an iso file through windows client.

The error message can be obtained using Mount-DiskImage command,
 the error is:
"Mount-DiskImage : The sector size of the physical disk on which the
virtual disk resides is not supported."

This patch reports fixed 4KB sector size if ->s_blocksize is bigger
than 4KB.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2022-04-13 10:01:36 +09:00 committed by Steve French
parent 8510a043d3
commit 02655a70b7
1 changed files with 7 additions and 4 deletions
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11
fs/ksmbd/smb2pdu.c
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@ -11,6 +11,7 @@
#include <linux/statfs.h>
#include <linux/ethtool.h>
#include <linux/falloc.h>
#include <linux/mount.h>
#include "glob.h"
#include "smbfsctl.h"
@ -4995,15 +4996,17 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,
case FS_SECTOR_SIZE_INFORMATION:
{
struct smb3_fs_ss_info *info;
unsigned int sector_size =
min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
info = (struct smb3_fs_ss_info *)(rsp->Buffer);
info->LogicalBytesPerSector = cpu_to_le32(stfs.f_bsize);
info->LogicalBytesPerSector = cpu_to_le32(sector_size);
info->PhysicalBytesPerSectorForAtomicity =
cpu_to_le32(stfs.f_bsize);
info->PhysicalBytesPerSectorForPerf = cpu_to_le32(stfs.f_bsize);
cpu_to_le32(sector_size);
info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
info->FSEffPhysicalBytesPerSectorForAtomicity =
cpu_to_le32(stfs.f_bsize);
cpu_to_le32(sector_size);
info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
info->ByteOffsetForSectorAlignment = 0;