summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorSteve French <smfrench@gmail.com>2015-06-24 03:17:02 -0500
committerSteve French <steve.french@primarydata.com>2015-06-28 21:15:45 -0500
commitb3152e2c7aa9ad0c50085738d048fbf16d01d32d (patch)
tree2015cead72bda343290909c2187cf3039171d53b
parent9d1b06602eb6716220c5988735c0b4944d62abaa (diff)
Add ioctl to set integrity
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@primarydata.com>
-rw-r--r--fs/cifs/cifsglob.h2
-rw-r--r--fs/cifs/ioctl.c11
-rw-r--r--fs/cifs/smb2ops.c24
-rw-r--r--fs/cifs/smb2pdu.h1
4 files changed, 38 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 81194e6c7601..b406a32deb1f 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 7843b19ef5be..49b8b6e41a18 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 b1e9c0f1b24c..df91bcf56d67 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 c302e82f2575..2d91c2a7b218 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