cifs: fix use of CONFIG_CIFS_ACL

Some of the code under CONFIG_CIFS_ACL is dependent upon code under
CONFIG_CIFS_EXPERIMENTAL, but the Kconfig options don't reflect that
dependency. Move more of the ACL code out from under
CONFIG_CIFS_EXPERIMENTAL and under CONFIG_CIFS_ACL.

Also move find_readable_file out from other any sort of Kconfig
option and make it a function normally compiled in.
Reported-and-Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/Makefile

@@ -6,7 +6,9 @@ obj-$(CONFIG_CIFS) += cifs.o
 cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
 	  link.o misc.o netmisc.o smbdes.o smbencrypt.o transport.o asn1.o \
 	  md4.o md5.o cifs_unicode.o nterr.o xattr.o cifsencrypt.o \
-	  readdir.o ioctl.o sess.o export.o cifsacl.o
+	  readdir.o ioctl.o sess.o export.o
+
+cifs-$(CONFIG_CIFS_ACL) += cifsacl.o
 
 cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
 

fs/cifs/cifsacl.c

@@ -30,8 +30,6 @@
 #include "cifs_debug.h"
 
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
-
 static struct cifs_wksid wksidarr[NUM_WK_SIDS] = {
 	{{1, 0, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0} }, "null user"},
 	{{1, 1, {0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0} }, "nobody"},
@@ -774,4 +772,3 @@ int mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode)
 
 	return rc;
 }
-#endif /* CONFIG_CIFS_EXPERIMENTAL */

fs/cifs/cifsacl.h

@@ -74,11 +74,7 @@ struct cifs_wksid {
 	char sidname[SIDNAMELENGTH];
 } __attribute__((packed));
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
-
 extern int match_sid(struct cifs_sid *);
 extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
 
-#endif /*  CONFIG_CIFS_EXPERIMENTAL */
-
 #endif /* _CIFSACL_H */

fs/cifs/cifsproto.h

@@ -79,9 +79,7 @@ extern bool is_valid_oplock_break(struct smb_hdr *smb,
 				  struct TCP_Server_Info *);
 extern bool is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
 extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool);
-#ifdef CONFIG_CIFS_EXPERIMENTAL
 extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
-#endif
 extern unsigned int smbCalcSize(struct smb_hdr *ptr);
 extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
 extern int decode_negTokenInit(unsigned char *security_blob, int length,

fs/cifs/cifssmb.c

@@ -2478,95 +2478,6 @@ CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
 }
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
-/* Initialize NT TRANSACT SMB into small smb request buffer.
-   This assumes that all NT TRANSACTS that we init here have
-   total parm and data under about 400 bytes (to fit in small cifs
-   buffer size), which is the case so far, it easily fits. NB:
-	Setup words themselves and ByteCount
-	MaxSetupCount (size of returned setup area) and
-	MaxParameterCount (returned parms size) must be set by caller */
-static int
-smb_init_nttransact(const __u16 sub_command, const int setup_count,
-		   const int parm_len, struct cifsTconInfo *tcon,
-		   void **ret_buf)
-{
-	int rc;
-	__u32 temp_offset;
-	struct smb_com_ntransact_req *pSMB;
-
-	rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
-				(void **)&pSMB);
-	if (rc)
-		return rc;
-	*ret_buf = (void *)pSMB;
-	pSMB->Reserved = 0;
-	pSMB->TotalParameterCount = cpu_to_le32(parm_len);
-	pSMB->TotalDataCount  = 0;
-	pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
-					  MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
-	pSMB->ParameterCount = pSMB->TotalParameterCount;
-	pSMB->DataCount  = pSMB->TotalDataCount;
-	temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
-			(setup_count * 2) - 4 /* for rfc1001 length itself */;
-	pSMB->ParameterOffset = cpu_to_le32(temp_offset);
-	pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
-	pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
-	pSMB->SubCommand = cpu_to_le16(sub_command);
-	return 0;
-}
-
-static int
-validate_ntransact(char *buf, char **ppparm, char **ppdata,
-		   __u32 *pparmlen, __u32 *pdatalen)
-{
-	char *end_of_smb;
-	__u32 data_count, data_offset, parm_count, parm_offset;
-	struct smb_com_ntransact_rsp *pSMBr;
-
-	*pdatalen = 0;
-	*pparmlen = 0;
-
-	if (buf == NULL)
-		return -EINVAL;
-
-	pSMBr = (struct smb_com_ntransact_rsp *)buf;
-
-	/* ByteCount was converted from little endian in SendReceive */
-	end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount +
-			(char *)&pSMBr->ByteCount;
-
-	data_offset = le32_to_cpu(pSMBr->DataOffset);
-	data_count = le32_to_cpu(pSMBr->DataCount);
-	parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
-	parm_count = le32_to_cpu(pSMBr->ParameterCount);
-
-	*ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
-	*ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
-
-	/* should we also check that parm and data areas do not overlap? */
-	if (*ppparm > end_of_smb) {
-		cFYI(1, "parms start after end of smb");
-		return -EINVAL;
-	} else if (parm_count + *ppparm > end_of_smb) {
-		cFYI(1, "parm end after end of smb");
-		return -EINVAL;
-	} else if (*ppdata > end_of_smb) {
-		cFYI(1, "data starts after end of smb");
-		return -EINVAL;
-	} else if (data_count + *ppdata > end_of_smb) {
-		cFYI(1, "data %p + count %d (%p) past smb end %p start %p",
-			*ppdata, data_count, (data_count + *ppdata),
-			end_of_smb, pSMBr);
-		return -EINVAL;
-	} else if (parm_count + data_count > pSMBr->ByteCount) {
-		cFYI(1, "parm count and data count larger than SMB");
-		return -EINVAL;
-	}
-	*pdatalen = data_count;
-	*pparmlen = parm_count;
-	return 0;
-}
-
 int
 CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
 			const unsigned char *searchName,
@@ -3056,7 +2967,97 @@ CIFSGetExtAttr(const int xid, struct cifsTconInfo *tcon,
 
 #endif /* CONFIG_POSIX */
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
+#ifdef CONFIG_CIFS_ACL
+/*
+ * Initialize NT TRANSACT SMB into small smb request buffer.  This assumes that
+ * all NT TRANSACTS that we init here have total parm and data under about 400
+ * bytes (to fit in small cifs buffer size), which is the case so far, it
+ * easily fits. NB: Setup words themselves and ByteCount MaxSetupCount (size of
+ * returned setup area) and MaxParameterCount (returned parms size) must be set
+ * by caller
+ */
+static int
+smb_init_nttransact(const __u16 sub_command, const int setup_count,
+		   const int parm_len, struct cifsTconInfo *tcon,
+		   void **ret_buf)
+{
+	int rc;
+	__u32 temp_offset;
+	struct smb_com_ntransact_req *pSMB;
+
+	rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
+				(void **)&pSMB);
+	if (rc)
+		return rc;
+	*ret_buf = (void *)pSMB;
+	pSMB->Reserved = 0;
+	pSMB->TotalParameterCount = cpu_to_le32(parm_len);
+	pSMB->TotalDataCount  = 0;
+	pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
+					  MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->DataCount  = pSMB->TotalDataCount;
+	temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
+			(setup_count * 2) - 4 /* for rfc1001 length itself */;
+	pSMB->ParameterOffset = cpu_to_le32(temp_offset);
+	pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
+	pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
+	pSMB->SubCommand = cpu_to_le16(sub_command);
+	return 0;
+}
+
+static int
+validate_ntransact(char *buf, char **ppparm, char **ppdata,
+		   __u32 *pparmlen, __u32 *pdatalen)
+{
+	char *end_of_smb;
+	__u32 data_count, data_offset, parm_count, parm_offset;
+	struct smb_com_ntransact_rsp *pSMBr;
+
+	*pdatalen = 0;
+	*pparmlen = 0;
+
+	if (buf == NULL)
+		return -EINVAL;
+
+	pSMBr = (struct smb_com_ntransact_rsp *)buf;
+
+	/* ByteCount was converted from little endian in SendReceive */
+	end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount +
+			(char *)&pSMBr->ByteCount;
+
+	data_offset = le32_to_cpu(pSMBr->DataOffset);
+	data_count = le32_to_cpu(pSMBr->DataCount);
+	parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
+	parm_count = le32_to_cpu(pSMBr->ParameterCount);
+
+	*ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
+	*ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
+
+	/* should we also check that parm and data areas do not overlap? */
+	if (*ppparm > end_of_smb) {
+		cFYI(1, "parms start after end of smb");
+		return -EINVAL;
+	} else if (parm_count + *ppparm > end_of_smb) {
+		cFYI(1, "parm end after end of smb");
+		return -EINVAL;
+	} else if (*ppdata > end_of_smb) {
+		cFYI(1, "data starts after end of smb");
+		return -EINVAL;
+	} else if (data_count + *ppdata > end_of_smb) {
+		cFYI(1, "data %p + count %d (%p) past smb end %p start %p",
+			*ppdata, data_count, (data_count + *ppdata),
+			end_of_smb, pSMBr);
+		return -EINVAL;
+	} else if (parm_count + data_count > pSMBr->ByteCount) {
+		cFYI(1, "parm count and data count larger than SMB");
+		return -EINVAL;
+	}
+	*pdatalen = data_count;
+	*pparmlen = parm_count;
+	return 0;
+}
+
 /* Get Security Descriptor (by handle) from remote server for a file or dir */
 int
 CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
@@ -3214,7 +3215,7 @@ CIFSSMBSetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
 	return (rc);
 }
 
-#endif /* CONFIG_CIFS_EXPERIMENTAL */
+#endif /* CONFIG_CIFS_ACL */
 
 /* Legacy Query Path Information call for lookup to old servers such
    as Win9x/WinME */

fs/cifs/file.c

@@ -1108,7 +1108,6 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
 	return total_written;
 }
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
 struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode,
 					bool fsuid_only)
 {
@@ -1142,7 +1141,6 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode,
 	spin_unlock(&cifs_file_list_lock);
 	return NULL;
 }
-#endif
 
 struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode,
 					bool fsuid_only)

fs/cifs/inode.c

@@ -686,7 +686,7 @@ int cifs_get_inode_info(struct inode **pinode,
 			cFYI(1, "cifs_sfu_type failed: %d", tmprc);
 	}
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
+#ifdef CONFIG_CIFS_ACL
 	/* fill in 0777 bits from ACL */
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 		rc = cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path,
@@ -697,7 +697,7 @@ int cifs_get_inode_info(struct inode **pinode,
 			goto cgii_exit;
 		}
 	}
-#endif
+#endif /* CONFIG_CIFS_ACL */
 
 	/* fill in remaining high mode bits e.g. SUID, VTX */
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
@@ -2122,7 +2122,7 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
 
 	if (attrs->ia_valid & ATTR_MODE) {
 		rc = 0;
-#ifdef CONFIG_CIFS_EXPERIMENTAL
+#ifdef CONFIG_CIFS_ACL
 		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 			rc = mode_to_cifs_acl(inode, full_path, mode);
 			if (rc) {
@@ -2131,7 +2131,7 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
 				goto cifs_setattr_exit;
 			}
 		} else
-#endif
+#endif /* CONFIG_CIFS_ACL */
 		if (((mode & S_IWUGO) == 0) &&
 		    (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {