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authorSteve French <smfrench@gmail.com>2013-10-15 00:27:32 +0400
committerSteve French <smfrench@gmail.com>2013-11-02 21:52:44 +0400
commitc7f508a99bf229963915e79a603e0618d1d2ba76 (patch)
treeb2eaa3a16ccafe2aa1d28130edaa552dd900f66c /fs/cifs/cifspdu.h
parentaf6a12ea8d4bb39a87527835b943bde4215897e5 (diff)
downloadlinux-c7f508a99bf229963915e79a603e0618d1d2ba76.tar.xz
Allow setting per-file compression via CIFS protocol
An earlier patch allowed setting the per-file compression flag "chattr +c filename" on an smb2 or smb3 mount, and also allowed lsattr to return whether a file on a cifs, or smb2/smb3 mount was compressed. This patch extends the ability to set the per-file compression flag to the cifs protocol, which uses a somewhat different IOCTL mechanism than SMB2, although the payload (the flags stored in the compression_state) are the same. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifspdu.h')
-rw-r--r--fs/cifs/cifspdu.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index f80f98f5ef9c..9e5ee34de986 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -1352,6 +1352,35 @@ typedef struct smb_com_transaction_ioctl_req {
__u8 Data[1];
} __attribute__((packed)) TRANSACT_IOCTL_REQ;
+typedef struct smb_com_transaction_compr_ioctl_req {
+ struct smb_hdr hdr; /* wct = 23 */
+ __u8 MaxSetupCount;
+ __u16 Reserved;
+ __le32 TotalParameterCount;
+ __le32 TotalDataCount;
+ __le32 MaxParameterCount;
+ __le32 MaxDataCount;
+ __le32 ParameterCount;
+ __le32 ParameterOffset;
+ __le32 DataCount;
+ __le32 DataOffset;
+ __u8 SetupCount; /* four setup words follow subcommand */
+ /* SNIA spec incorrectly included spurious pad here */
+ __le16 SubCommand; /* 2 = IOCTL/FSCTL */
+ __le32 FunctionCode;
+ __u16 Fid;
+ __u8 IsFsctl; /* 1 = File System Control 0 = device control (IOCTL) */
+ __u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS) */
+ __le16 ByteCount;
+ __u8 Pad[3];
+ __le16 compression_state; /* See below for valid flags */
+} __attribute__((packed)) TRANSACT_COMPR_IOCTL_REQ;
+
+/* compression state flags */
+#define COMPRESSION_FORMAT_NONE 0x0000
+#define COMPRESSION_FORMAT_DEFAULT 0x0001
+#define COMPRESSION_FORMAT_LZNT1 0x0002
+
typedef struct smb_com_transaction_ioctl_rsp {
struct smb_hdr hdr; /* wct = 19 */
__u8 Reserved[3];