From 02655a70b7cc0f534531ee65fa72692f4d31a944 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Wed, 13 Apr 2022 10:01:36 +0900 Subject: [PATCH] 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 Signed-off-by: Steve French --- fs/ksmbd/smb2pdu.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 62cc0f9..16c803a 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -11,6 +11,7 @@ #include #include #include +#include #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; -- 2.7.4