Merge master.kernel.org:/pub/scm/linux/kernel/git/sfrench/cifs-2.6

fs/cifs/CHANGES

@@ -1,3 +1,11 @@
+Version 1.40
+------------
+Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance
+of readpages by eliminating one extra memcpy. Allow update of file size
+from remote server even if file is open for write as long as mount is
+directio.  Recognize share mode security and send NTLM encrypted password
+on tree connect if share mode negotiated.
+
 Version 1.39
 ------------
 Defer close of a file handle slightly if pending writes depend on that handle
@@ -7,6 +15,8 @@ Fix SFU style symlinks and mknod needed for servers which do not support the
 CIFS Unix Extensions.  Fix setfacl/getfacl on bigendian. Timeout negative
 dentries so files that the client sees as deleted but that later get created
 on the server will be recognized.  Add client side permission check on setattr.
+Timeout stuck requests better (where server has never responded or sent corrupt
+responses)
 
 Version 1.38
 ------------

fs/cifs/README

@@ -436,7 +436,17 @@ A partial list of the supported mount options follows:
 		SFU does).  In the future the bottom 9 bits of the mode
 		mode also will be emulated using queries of the security
 		descriptor (ACL).
-
+sec		Security mode.  Allowed values are:
+			none	attempt to connection as a null user (no name)
+			krb5    Use Kerberos version 5 authentication
+			krb5i   Use Kerberos authentication and packet signing
+			ntlm    Use NTLM password hashing (default)
+			ntlmi   Use NTLM password hashing with signing (if
+				/proc/fs/cifs/PacketSigningEnabled on or if
+				server requires signing also can be the default) 
+			ntlmv2  Use NTLMv2 password hashing      
+			ntlmv2i Use NTLMv2 password hashing with packet signing
+
 The mount.cifs mount helper also accepts a few mount options before -o
 including:
 

fs/cifs/cifs_debug.c

@@ -219,6 +219,10 @@ cifs_stats_write(struct file *file, const char __user *buffer,
 
         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 		read_lock(&GlobalSMBSeslock);
+#ifdef CONFIG_CIFS_STATS2
+		atomic_set(&totBufAllocCount, 0);
+		atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
 		list_for_each(tmp, &GlobalTreeConnectionList) {
 			tcon = list_entry(tmp, struct cifsTconInfo,
 					cifsConnectionList);
@@ -276,6 +280,14 @@ cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
 			smBufAllocCount.counter,cifs_min_small);
 	length += item_length;
 	buf += item_length;
+#ifdef CONFIG_CIFS_STATS2
+        item_length = sprintf(buf, "Total Large %d Small %d Allocations\n",
+				atomic_read(&totBufAllocCount),
+		                atomic_read(&totSmBufAllocCount));
+	length += item_length;
+	buf += item_length;
+#endif /* CONFIG_CIFS_STATS2 */
+
 	item_length = 
 		sprintf(buf,"Operations (MIDs): %d\n",
 			midCount.counter);
@@ -389,8 +401,8 @@ static read_proc_t ntlmv2_enabled_read;
 static write_proc_t ntlmv2_enabled_write;
 static read_proc_t packet_signing_enabled_read;
 static write_proc_t packet_signing_enabled_write;
-static read_proc_t quotaEnabled_read;
-static write_proc_t quotaEnabled_write;
+static read_proc_t experimEnabled_read;
+static write_proc_t experimEnabled_write;
 static read_proc_t linuxExtensionsEnabled_read;
 static write_proc_t linuxExtensionsEnabled_write;
 
@@ -430,9 +442,9 @@ cifs_proc_init(void)
 		pde->write_proc = oplockEnabled_write;
 
 	pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
-				quotaEnabled_read, NULL);
+				experimEnabled_read, NULL);
 	if (pde)
-		pde->write_proc = quotaEnabled_write;
+		pde->write_proc = experimEnabled_write;
 
 	pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 				linuxExtensionsEnabled_read, NULL);
@@ -574,14 +586,13 @@ oplockEnabled_write(struct file *file, const char __user *buffer,
 }
 
 static int
-quotaEnabled_read(char *page, char **start, off_t off,
+experimEnabled_read(char *page, char **start, off_t off,
                    int count, int *eof, void *data)
 {
         int len;
 
         len = sprintf(page, "%d\n", experimEnabled);
-/* could also check if quotas are enabled in kernel
-	as a whole first */
+
         len -= off;
         *start = page + off;
 
@@ -596,21 +607,23 @@ quotaEnabled_read(char *page, char **start, off_t off,
         return len;
 }
 static int
-quotaEnabled_write(struct file *file, const char __user *buffer,
+experimEnabled_write(struct file *file, const char __user *buffer,
                     unsigned long count, void *data)
 {
-        char c;
-        int rc;
+	char c;
+	int rc;
 
-        rc = get_user(c, buffer);
-        if (rc)
-                return rc;
-        if (c == '0' || c == 'n' || c == 'N')
-                experimEnabled = 0;
-        else if (c == '1' || c == 'y' || c == 'Y')
-                experimEnabled = 1;
+	rc = get_user(c, buffer);
+	if (rc)
+		return rc;
+	if (c == '0' || c == 'n' || c == 'N')
+		experimEnabled = 0;
+	else if (c == '1' || c == 'y' || c == 'Y')
+		experimEnabled = 1;
+	else if (c == '2')
+		experimEnabled = 2;
 
-        return count;
+	return count;
 }
 
 static int
@@ -620,8 +633,6 @@ linuxExtensionsEnabled_read(char *page, char **start, off_t off,
         int len;
 
         len = sprintf(page, "%d\n", linuxExtEnabled);
-/* could also check if quotas are enabled in kernel
-	as a whole first */
         len -= off;
         *start = page + off;
 

fs/cifs/cifs_fs_sb.h

@@ -24,9 +24,10 @@
 #define CIFS_MOUNT_DIRECT_IO    8 /* do not write nor read through page cache */
 #define CIFS_MOUNT_NO_XATTR  0x10 /* if set - disable xattr support */
 #define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames */
-#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible. */
-#define CIFS_MOUNT_UNX_EMUL    0x80 /* Network compat with SFUnix emulation */
+#define CIFS_MOUNT_POSIX_PATHS	0x40 /* Negotiate posix pathnames if possible. */
+#define CIFS_MOUNT_UNX_EMUL	0x80 /* Network compat with SFUnix emulation */
 #define CIFS_MOUNT_NO_BRL	0x100 /* No sending byte range locks to srv */
+#define CIFS_MOUNT_CIFS_ACL	0x200 /* send ACL requests to non-POSIX srv */
 
 struct cifs_sb_info {
 	struct cifsTconInfo *tcon;	/* primary mount */

fs/cifs/cifsacl.h

@@ -0,0 +1,38 @@
+/*
+ *   fs/cifs/cifsacl.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2005
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _CIFSACL_H
+#define _CIFSACL_H
+
+struct cifs_sid {
+	__u8 revision; /* revision level */
+	__u8 num_subauths;
+	__u8 authority[6];
+	__u32 sub_auth[4];
+	/* next sub_auth if any ... */
+} __attribute__((packed));
+
+/* everyone */
+extern const struct cifs_sid sid_everyone;
+/* group users */
+extern const struct cifs_sid sid_user;
+
+#endif /* _CIFSACL_H */

fs/cifs/cifsencrypt.c

@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/cifsencrypt.c
  *
- *   Copyright (C) International Business Machines  Corp., 2003
+ *   Copyright (C) International Business Machines  Corp., 2005
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -82,6 +82,59 @@ int cifs_sign_smb(struct smb_hdr * cifs_pdu, struct TCP_Server_Info * server,
 	return rc;
 }
 
+static int cifs_calc_signature2(const struct kvec * iov, int n_vec,
+				const char * key, char * signature)
+{
+        struct  MD5Context context;
+
+        if((iov == NULL) || (signature == NULL))
+                return -EINVAL;
+
+        MD5Init(&context);
+        MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16);
+
+/*        MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length); */ /* BB FIXME BB */
+
+        MD5Final(signature,&context);
+
+	return -EOPNOTSUPP;
+/*        return 0; */
+}
+
+
+int cifs_sign_smb2(struct kvec * iov, int n_vec, struct TCP_Server_Info *server,
+		   __u32 * pexpected_response_sequence_number)
+{
+	int rc = 0;
+	char smb_signature[20];
+	struct smb_hdr * cifs_pdu = iov[0].iov_base;
+
+	if((cifs_pdu == NULL) || (server == NULL))
+		return -EINVAL;
+
+	if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
+		return rc;
+
+        spin_lock(&GlobalMid_Lock);
+        cifs_pdu->Signature.Sequence.SequenceNumber = 
+				cpu_to_le32(server->sequence_number);
+        cifs_pdu->Signature.Sequence.Reserved = 0;
+
+        *pexpected_response_sequence_number = server->sequence_number++;
+        server->sequence_number++;
+        spin_unlock(&GlobalMid_Lock);
+
+        rc = cifs_calc_signature2(iov, n_vec, server->mac_signing_key,
+				      smb_signature);
+        if(rc)
+                memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
+        else
+                memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
+
+        return rc;
+
+}
+
 int cifs_verify_signature(struct smb_hdr * cifs_pdu, const char * mac_key,
 	__u32 expected_sequence_number)
 {

fs/cifs/cifsfs.c

@@ -513,6 +513,17 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf,
 	return written;
 }
 
+static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+{
+	/* origin == SEEK_END => we must revalidate the cached file length */
+	if (origin == 2) {
+		int retval = cifs_revalidate(file->f_dentry);
+		if (retval < 0)
+			return (loff_t)retval;
+	}
+	return remote_llseek(file, offset, origin);
+}
+
 static struct file_system_type cifs_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "cifs",
@@ -586,6 +597,7 @@ struct file_operations cifs_file_ops = {
 	.flush = cifs_flush,
 	.mmap  = cifs_file_mmap,
 	.sendfile = generic_file_sendfile,
+	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl	= cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -609,7 +621,7 @@ struct file_operations cifs_file_direct_ops = {
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	.dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
@@ -627,6 +639,7 @@ struct file_operations cifs_file_nobrl_ops = {
 	.flush = cifs_flush,
 	.mmap  = cifs_file_mmap,
 	.sendfile = generic_file_sendfile,
+	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl	= cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -649,7 +662,7 @@ struct file_operations cifs_file_direct_nobrl_ops = {
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	.dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
@@ -733,7 +746,7 @@ cifs_init_request_bufs(void)
 		kmem_cache_destroy(cifs_req_cachep);
 		return -ENOMEM;
 	}
-	/* 256 (MAX_CIFS_HDR_SIZE bytes is enough for most SMB responses and
+	/* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
 	almost all handle based requests (but not write response, nor is it
 	sufficient for path based requests).  A smaller size would have
 	been more efficient (compacting multiple slab items on one 4k page) 
@@ -742,7 +755,8 @@ cifs_init_request_bufs(void)
 	efficient to alloc 1 per page off the slab compared to 17K (5page) 
 	alloc of large cifs buffers even when page debugging is on */
 	cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
-			MAX_CIFS_HDR_SIZE, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+			MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, 
+			NULL, NULL);
 	if (cifs_sm_req_cachep == NULL) {
 		mempool_destroy(cifs_req_poolp);
 		kmem_cache_destroy(cifs_req_cachep);
@@ -954,6 +968,12 @@ init_cifs(void)
 	atomic_set(&tconInfoReconnectCount, 0);
 
 	atomic_set(&bufAllocCount, 0);
+	atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+	atomic_set(&totBufAllocCount, 0);
+	atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
 	atomic_set(&midCount, 0);
 	GlobalCurrentXid = 0;
 	GlobalTotalActiveXid = 0;

fs/cifs/cifsfs.h

@@ -99,5 +99,5 @@ extern ssize_t	cifs_getxattr(struct dentry *, const char *, void *, size_t);
 extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
 extern int cifs_ioctl (struct inode * inode, struct file * filep,
 		       unsigned int command, unsigned long arg);
-#define CIFS_VERSION   "1.39"
+#define CIFS_VERSION   "1.40"
 #endif				/* _CIFSFS_H */