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smb3: fill in statfs fsid and correct namelen

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Fil in the correct namelen (typically 255 not 4096) in the
statfs response and also fill in a reasonably unique fsid
(in this case taken from the volume id, and the creation time
of the volume).

In the case of the POSIX statfs all fields are now filled in,
and in the case of non-POSIX mounts, all fields are filled
in which can be.

Signed-off-by: Steve French <stfrench@gmail.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
This commit is contained in:
Steve French
2018-06-24 23:18:52 -05:00
parent a12d0c590c
commit 21ba3845b5
4 changed files with 31 additions and 8 deletions
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8
fs/cifs/smb2pdu.c
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@@ -4045,6 +4045,9 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
} else if (level == FS_SECTOR_SIZE_INFORMATION) {
max_len = sizeof(struct smb3_fs_ss_info);
min_len = sizeof(struct smb3_fs_ss_info);
} else if (level == FS_VOLUME_INFORMATION) {
max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
min_len = sizeof(struct smb3_fs_vol_info);
} else {
cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
return -EINVAL;
@@ -4089,6 +4092,11 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
tcon->perf_sector_size =
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
} else if (level == FS_VOLUME_INFORMATION) {
struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
(offset + (char *)rsp);
tcon->vol_serial_number = vol_info->VolumeSerialNumber;
tcon->vol_create_time = vol_info->VolumeCreationTime;
}
qfsattr_exit: