From: Steve French <smfrench@xxxxxxxxx>
set integrity increases reliability of files stored on SMB3 servers.
Add ioctl to allow setting this on files on SMB3 and later mounts.
Signed-off-by: Steve French <steve.french@xxxxxxxxxxxxxxx>
---
fs/cifs/cifsglob.h | 2 ++
fs/cifs/ioctl.c | 11 +++++++++++
fs/cifs/smb2ops.c | 24 ++++++++++++++++++++++++
fs/cifs/smb2pdu.h | 1 +
4 files changed, 38 insertions(+)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 81194e6..b406a32 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -372,6 +372,8 @@ struct smb_version_operations {
void (*new_lease_key)(struct cifs_fid *);
int (*generate_signingkey)(struct cifs_ses *);
int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
+ int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
+ struct cifsFileInfo *src_file);
int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
struct cifs_sb_info *, const unsigned char *,
char *, unsigned int *);
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 7843b19..49b8b6e 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -35,6 +35,7 @@
#define CIFS_IOCTL_MAGIC 0xCF
#define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int)
+#define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4)
static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
unsigned long srcfd, u64 off, u64 len, u64 destoff,
@@ -217,6 +218,16 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
case BTRFS_IOC_CLONE:
rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true);
break;
+ case CIFS_IOC_SET_INTEGRITY:
+ if (pSMBFile == NULL)
+ break;
+ tcon = tlink_tcon(pSMBFile->tlink);
+ if (tcon->ses->server->ops->set_integrity)
+ rc = tcon->ses->server->ops->set_integrity(xid,
+ tcon, pSMBFile);
+ else
+ rc = -EOPNOTSUPP;
+ break;
default:
cifs_dbg(FYI, "unsupported ioctl\n");
break;
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index d8a124c..f92960b 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -862,6 +862,28 @@ smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
}
static int
+smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifsFileInfo *cfile)
+{
+ struct fsctl_set_integrity_information_req integr_info;
+ char *retbuf = NULL;
+ unsigned int ret_data_len;
+
+ integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
+ integr_info.Flags = 0;
+ integr_info.Reserved = 0;
+
+ return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+ cfile->fid.volatile_fid,
+ FSCTL_SET_INTEGRITY_INFORMATION,
+ true /* is_fsctl */, (char *)&integr_info,
+ sizeof(struct fsctl_set_integrity_information_req),
+ (char **)&retbuf,
+ &ret_data_len);
+
+}
+
+static int
smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
const char *path, struct cifs_sb_info *cifs_sb,
struct cifs_fid *fid, __u16 search_flags,
@@ -1671,6 +1693,7 @@ struct smb_version_operations smb30_operations = {
.new_lease_key = smb2_new_lease_key,
.generate_signingkey = generate_smb3signingkey,
.calc_signature = smb3_calc_signature,
+ .set_integrity = smb3_set_integrity,
.is_read_op = smb21_is_read_op,
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
@@ -1756,6 +1779,7 @@ struct smb_version_operations smb311_operations = {
.new_lease_key = smb2_new_lease_key,
.generate_signingkey = generate_smb3signingkey,
.calc_signature = smb3_calc_signature,
+ .set_integrity = smb3_set_integrity,
.is_read_op = smb21_is_read_op,
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index c302e82..2d91c2a 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -638,6 +638,7 @@ struct fsctl_get_integrity_information_rsp {
/* Integrity ChecksumAlgorithm choices for above */
#define CHECKSUM_TYPE_NONE 0x0000
#define CHECKSUM_TYPE_CRC64 0x0002
+#define CHECKSUM_TYPE_UNCHANGED 0xFFFF /* set only */
/* Integrity flags for above */
#define FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF 0x00000001
--
2.1.4
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