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

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
cifs: remove bogus remapping of error in cifs_filldir()
cifs: allow calling cifs_build_path_to_root on incomplete cifs_sb
cifs: fix check of error return from is_path_accessable
cifs: remove Local_System_Name
cifs: fix use of CONFIG_CIFS_ACL
cifs: add attribute cache timeout (actimeo) tunable

fs/cifs/Makefile

···
 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/README

···
   wsize		default write size (default 57344)
 		maximum wsize currently allowed by CIFS is 57344 (fourteen
 		4096 byte pages)
+  actimeo=n	attribute cache timeout in seconds (default 1 second).
+		After this timeout, the cifs client requests fresh attribute
+		information from the server. This option allows to tune the
+		attribute cache timeout to suit the workload needs. Shorter
+		timeouts mean better the cache coherency, but increased number
+		of calls to the server. Longer timeouts mean reduced number
+		of calls to the server at the expense of less stricter cache
+		coherency checks (i.e. incorrect attribute cache for a short
+		period of time).
   rw		mount the network share read-write (note that the
 		server may still consider the share read-only)
   ro		mount network share read-only

fs/cifs/cifs_fs_sb.h

···
 	struct nls_table *local_nls;
 	unsigned int rsize;
 	unsigned int wsize;
+	unsigned long actimeo; /* attribute cache timeout (jiffies) */
 	atomic_t active;
 	uid_t	mnt_uid;
 	gid_t	mnt_gid;

fs/cifs/cifsacl.c

···
 #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"},
···
 
 	return rc;
 }
-#endif /* CONFIG_CIFS_EXPERIMENTAL */

fs/cifs/cifsacl.h

···
 	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/cifsfs.c

···
 
 	seq_printf(s, ",rsize=%d", cifs_sb->rsize);
 	seq_printf(s, ",wsize=%d", cifs_sb->wsize);
+	/* convert actimeo and display it in seconds */
+		seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
 
 	return 0;
 }
···
 	GlobalCurrentXid = 0;
 	GlobalTotalActiveXid = 0;
 	GlobalMaxActiveXid = 0;
-	memset(Local_System_Name, 0, 15);
 	spin_lock_init(&cifs_tcp_ses_lock);
 	spin_lock_init(&cifs_file_list_lock);
 	spin_lock_init(&GlobalMid_Lock);

fs/cifs/cifsglob.h

···
 #define CIFS_MIN_RCV_POOL 4
 
 /*
+ * default attribute cache timeout (jiffies)
+ */
+#define CIFS_DEF_ACTIMEO (1 * HZ)
+
+/*
+ * max attribute cache timeout (jiffies) - 2^30
+ */
+#define CIFS_MAX_ACTIMEO (1 << 30)
+
+/*
  * MAX_REQ is the maximum number of requests that WE will send
  * on one socket concurrently. It also matches the most common
  * value of max multiplex returned by servers.  We may
···
 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;	/* prot by GlobalMid_Sem */
 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
 					  /* on midQ entries */
-GLOBAL_EXTERN char Local_System_Name[15];
-
 /*
  *  Global counters, updated atomically
  */

fs/cifs/cifsproto.h

···
 	     __func__, curr_xid, (int)rc);			\
 } while (0)
 extern char *build_path_from_dentry(struct dentry *);
-extern char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb);
+extern char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb,
+					struct cifsTconInfo *tcon);
 extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
 extern char *cifs_compose_mount_options(const char *sb_mountdata,
 		const char *fullpath, const struct dfs_info3_param *ref,
···
 				  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

···
 }
 
 #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,
···
 
 #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,
···
 	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/connect.c

···
 	unsigned int wsize;
 	bool sockopt_tcp_nodelay:1;
 	unsigned short int port;
+	unsigned long actimeo; /* attribute cache timeout (jiffies) */
 	char *prepath;
 	struct sockaddr_storage srcaddr; /* allow binding to a local IP */
 	struct nls_table *local_nls;
···
 	short int override_gid = -1;
 	bool uid_specified = false;
 	bool gid_specified = false;
+	char *nodename = utsname()->nodename;
 
 	separator[0] = ',';
 	separator[1] = 0;
 
-	if (Local_System_Name[0] != 0)
-		memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
-	else {
-		char *nodename = utsname()->nodename;
-		int n = strnlen(nodename, 15);
-		memset(vol->source_rfc1001_name, 0x20, 15);
-		for (i = 0; i < n; i++) {
-			/* does not have to be perfect mapping since field is
-			informational, only used for servers that do not support
-			port 445 and it can be overridden at mount time */
-			vol->source_rfc1001_name[i] = toupper(nodename[i]);
-		}
-	}
+	/*
+	 * does not have to be perfect mapping since field is
+	 * informational, only used for servers that do not support
+	 * port 445 and it can be overridden at mount time
+	 */
+	memset(vol->source_rfc1001_name, 0x20, 15);
+	for (i = 0; i < strnlen(nodename, 15); i++)
+		vol->source_rfc1001_name[i] = toupper(nodename[i]);
+
 	vol->source_rfc1001_name[15] = 0;
 	/* null target name indicates to use *SMBSERVR default called name
 	   if we end up sending RFC1001 session initialize */
···
 	vol->posix_paths = 1;
 	/* default to using server inode numbers where available */
 	vol->server_ino = 1;
+
+	vol->actimeo = CIFS_DEF_ACTIMEO;
 
 	if (!options)
 		return 1;
···
 				if ((i == 15) && (value[i] != 0))
 					printk(KERN_WARNING "CIFS: server net"
 					"biosname longer than 15 truncated.\n");
+			}
+		} else if (strnicmp(data, "actimeo", 7) == 0) {
+			if (value && *value) {
+				vol->actimeo = HZ * simple_strtoul(value,
+								   &value, 0);
+				if (vol->actimeo > CIFS_MAX_ACTIMEO) {
+					cERROR(1, "CIFS: attribute cache"
+							"timeout too large");
+					return 1;
+				}
 			}
 		} else if (strnicmp(data, "credentials", 4) == 0) {
 			/* ignore */
···
 	cFYI(1, "file mode: 0x%x  dir mode: 0x%x",
 		cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
 
+	cifs_sb->actimeo = pvolume_info->actimeo;
+
 	if (pvolume_info->noperm)
 		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
 	if (pvolume_info->setuids)
···
 	/* check if a whole path (including prepath) is not remote */
 	if (!rc && cifs_sb->prepathlen && tcon) {
 		/* build_path_to_root works only when we have a valid tcon */
-		full_path = cifs_build_path_to_root(cifs_sb);
+		full_path = cifs_build_path_to_root(cifs_sb, tcon);
 		if (full_path == NULL) {
 			rc = -ENOMEM;
 			goto mount_fail_check;
 		}
 		rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
-		if (rc != -EREMOTE) {
+		if (rc != 0 && rc != -EREMOTE) {
 			kfree(full_path);
 			goto mount_fail_check;
 		}

fs/cifs/file.c

···
 	return total_written;
 }
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
 struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode,
 					bool fsuid_only)
 {
···
 	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

···
 			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,
···
 			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)
···
 	.lookup = cifs_lookup,
 };
 
-char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb)
+char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb,
+				struct cifsTconInfo *tcon)
 {
 	int pplen = cifs_sb->prepathlen;
 	int dfsplen;
 	char *full_path = NULL;
-	struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
 
 	/* if no prefix path, simply set path to the root of share to "" */
 	if (pplen == 0) {
···
 	char *full_path;
 	struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
 
-	full_path = cifs_build_path_to_root(cifs_sb);
+	full_path = cifs_build_path_to_root(cifs_sb, tcon);
 	if (full_path == NULL)
 		return ERR_PTR(-ENOMEM);
 
···
 cifs_inode_needs_reval(struct inode *inode)
 {
 	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 
 	if (cifs_i->clientCanCacheRead)
 		return false;
···
 	if (cifs_i->time == 0)
 		return true;
 
-	/* FIXME: the actimeo should be tunable */
-	if (time_after_eq(jiffies, cifs_i->time + HZ))
+	if (!time_in_range(jiffies, cifs_i->time,
+				cifs_i->time + cifs_sb->actimeo))
 		return true;
 
 	/* hardlinked files w/ noserverino get "special" treatment */
-	if (!(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
 	    S_ISREG(inode->i_mode) && inode->i_nlink != 1)
 		return true;
 
···
 
 	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) {
···
 				goto cifs_setattr_exit;
 			}
 		} else
-#endif
+#endif /* CONFIG_CIFS_ACL */
 		if (((mode & S_IWUGO) == 0) &&
 		    (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
 

fs/cifs/readdir.c

···
 	rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
 		     ino, fattr.cf_dtype);
 
-	/*
-	 * we can not return filldir errors to the caller since they are
-	 * "normal" when the stat blocksize is too small - we return remapped
-	 * error instead
-	 *
-	 * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above
-	 * case already. Why should we be clobbering other errors from it?
-	 */
-	if (rc) {
-		cFYI(1, "filldir rc = %d", rc);
-		rc = -EOVERFLOW;
-	}
 	dput(tmp_dentry);
 	return rc;
 }