CIFS: Add create lease v2 context for SMB3
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 0215e60..a9256bd 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -714,6 +714,19 @@
!(oplock & SMB2_LEASE_WRITE_CACHING_HE);
}
+static __le32
+map_oplock_to_lease(u8 oplock)
+{
+ if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
+ return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
+ else if (oplock == SMB2_OPLOCK_LEVEL_II)
+ return SMB2_LEASE_READ_CACHING;
+ else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
+ return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
+ SMB2_LEASE_WRITE_CACHING;
+ return 0;
+}
+
static char *
smb2_create_lease_buf(u8 *lease_key, u8 oplock)
{
@@ -725,15 +738,7 @@
buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
- if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
- buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING |
- SMB2_LEASE_READ_CACHING;
- else if (oplock == SMB2_OPLOCK_LEVEL_II)
- buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING;
- else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
- buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING |
- SMB2_LEASE_READ_CACHING |
- SMB2_LEASE_WRITE_CACHING;
+ buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
buf->ccontext.DataOffset = cpu_to_le16(offsetof
(struct create_lease, lcontext));
@@ -748,6 +753,32 @@
return (char *)buf;
}
+static char *
+smb3_create_lease_buf(u8 *lease_key, u8 oplock)
+{
+ struct create_lease_v2 *buf;
+
+ buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
+ buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
+ buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
+
+ buf->ccontext.DataOffset = cpu_to_le16(offsetof
+ (struct create_lease_v2, lcontext));
+ buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
+ buf->ccontext.NameOffset = cpu_to_le16(offsetof
+ (struct create_lease_v2, Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+ buf->Name[0] = 'R';
+ buf->Name[1] = 'q';
+ buf->Name[2] = 'L';
+ buf->Name[3] = 's';
+ return (char *)buf;
+}
+
static __u8
smb2_parse_lease_buf(void *buf)
{
@@ -758,6 +789,16 @@
return le32_to_cpu(lc->lcontext.LeaseState);
}
+static __u8
+smb3_parse_lease_buf(void *buf)
+{
+ struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
+
+ if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
+ return SMB2_OPLOCK_LEVEL_NOCHANGE;
+ return le32_to_cpu(lc->lcontext.LeaseState);
+}
+
struct smb_version_operations smb20_operations = {
.compare_fids = smb2_compare_fids,
.setup_request = smb2_setup_request,
@@ -969,8 +1010,8 @@
.calc_signature = smb3_calc_signature,
.is_read_op = smb21_is_read_op,
.set_oplock_level = smb21_set_oplock_level,
- .create_lease_buf = smb2_create_lease_buf,
- .parse_lease_buf = smb2_parse_lease_buf,
+ .create_lease_buf = smb3_create_lease_buf,
+ .parse_lease_buf = smb3_parse_lease_buf,
};
struct smb_version_values smb20_values = {
@@ -1030,7 +1071,7 @@
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
- .create_lease_size = sizeof(struct create_lease),
+ .create_lease_size = sizeof(struct create_lease_v2),
};
struct smb_version_values smb302_values = {
@@ -1050,5 +1091,5 @@
.cap_large_files = SMB2_LARGE_FILES,
.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
- .create_lease_size = sizeof(struct create_lease),
+ .create_lease_size = sizeof(struct create_lease_v2),
};
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index a2ec65a..b83d011 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -497,12 +497,31 @@
__le64 LeaseDuration;
} __packed;
+struct lease_context_v2 {
+ __le64 LeaseKeyLow;
+ __le64 LeaseKeyHigh;
+ __le32 LeaseState;
+ __le32 LeaseFlags;
+ __le64 LeaseDuration;
+ __le64 ParentLeaseKeyLow;
+ __le64 ParentLeaseKeyHigh;
+ __le16 Epoch;
+ __le16 Reserved;
+} __packed;
+
struct create_lease {
struct create_context ccontext;
__u8 Name[8];
struct lease_context lcontext;
} __packed;
+struct create_lease_v2 {
+ struct create_context ccontext;
+ __u8 Name[8];
+ struct lease_context_v2 lcontext;
+ __u8 Pad[4];
+} __packed;
+
struct create_durable {
struct create_context ccontext;
__u8 Name[8];