cifs: convert cifs_get_inode_info and non-posix readdir to use cifs_iget

cifs: convert cifs_get_inode_info and non-posix readdir to use cifs_iget

Rather than allocating an inode and filling it out, have
cifs_get_inode_info fill out a cifs_fattr and call cifs_iget. This means
a pretty hefty reorganization of cifs_get_inode_info.

For the readdir codepath, add a couple of new functions for filling out
cifs_fattr's from different FindFile response infolevels.

Finally, remove cifs_new_inode since there are no more callers.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 151 insertions, 246 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 55b616bb381..a807397f444 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -82,23 +82,34 @@ void
 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
 {
 	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
-	unsigned long now = jiffies;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	unsigned long oldtime = cifs_i->time;
 
 	inode->i_atime = fattr->cf_atime;
 	inode->i_mtime = fattr->cf_mtime;
 	inode->i_ctime = fattr->cf_ctime;
-	inode->i_mode = fattr->cf_mode;
 	inode->i_rdev = fattr->cf_rdev;
 	inode->i_nlink = fattr->cf_nlink;
 	inode->i_uid = fattr->cf_uid;
 	inode->i_gid = fattr->cf_gid;
 
+	/* if dynperm is set, don't clobber existing mode */
+	if (inode->i_state & I_NEW ||
+	    !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
+		inode->i_mode = fattr->cf_mode;
+
 	cifs_i->cifsAttrs = fattr->cf_cifsattrs;
 	cifs_i->uniqueid = fattr->cf_uniqueid;
 
+	if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
+		cifs_i->time = 0;
+	else
+		cifs_i->time = jiffies;
+
 	cFYI(1, ("inode 0x%p old_time=%ld new_time=%ld", inode,
-		 cifs_i->time, now));
-	cifs_i->time = now;
+		 oldtime, cifs_i->time));
+
+	cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
 
 	/*
 	 * Can't safely change the file size here if the client is writing to
@@ -219,49 +230,6 @@ cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
 	fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL;
 }
 
-/**
- * cifs_new inode - create new inode, initialize, and hash it
- * @sb - pointer to superblock
- * @inum - if valid pointer and serverino is enabled, replace i_ino with val
- *
- * Create a new inode, initialize it for CIFS and hash it. Returns the new
- * inode or NULL if one couldn't be allocated.
- *
- * If the share isn't mounted with "serverino" or inum is a NULL pointer then
- * we'll just use the inode number assigned by new_inode(). Note that this can
- * mean i_ino collisions since the i_ino assigned by new_inode is not
- * guaranteed to be unique.
- */
-struct inode *
-cifs_new_inode(struct super_block *sb, __u64 *inum)
-{
-	struct inode *inode;
-
-	inode = new_inode(sb);
-	if (inode == NULL)
-		return NULL;
-
-	/*
-	 * BB: Is i_ino == 0 legal? Here, we assume that it is. If it isn't we
-	 *     stop passing inum as ptr. Are there sanity checks we can use to
-	 *     ensure that the server is really filling in that field? Also,
-	 *     if serverino is disabled, perhaps we should be using iunique()?
-	 */
-	if (inum && (CIFS_SB(sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
-		inode->i_ino = (unsigned long) *inum;
-
-	/*
-	 * must set this here instead of cifs_alloc_inode since VFS will
-	 * clobber i_flags
-	 */
-	if (sb->s_flags & MS_NOATIME)
-		inode->i_flags |= S_NOATIME | S_NOCMTIME;
-
-	insert_inode_hash(inode);
-
-	return inode;
-}
-
 int cifs_get_inode_info_unix(struct inode **pinode,
 			     const unsigned char *full_path,
 			     struct super_block *sb, int xid)
@@ -302,9 +270,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
 	return rc;
 }
 
-static int decode_sfu_inode(struct inode *inode, __u64 size,
-			    const unsigned char *path,
-			    struct cifs_sb_info *cifs_sb, int xid)
+static int
+cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path,
+	      struct cifs_sb_info *cifs_sb, int xid)
 {
 	int rc;
 	int oplock = 0;
@@ -316,10 +284,15 @@ static int decode_sfu_inode(struct inode *inode, __u64 size,
 
 	pbuf = buf;
 
-	if (size == 0) {
-		inode->i_mode |= S_IFIFO;
+	fattr->cf_mode &= ~S_IFMT;
+
+	if (fattr->cf_eof == 0) {
+		fattr->cf_mode |= S_IFIFO;
+		fattr->cf_dtype = DT_FIFO;
 		return 0;
-	} else if (size < 8) {
+	} else if (fattr->cf_eof < 8) {
+		fattr->cf_mode |= S_IFREG;
+		fattr->cf_dtype = DT_REG;
 		return -EINVAL;	 /* EOPNOTSUPP? */
 	}
 
@@ -331,42 +304,46 @@ static int decode_sfu_inode(struct inode *inode, __u64 size,
 	if (rc == 0) {
 		int buf_type = CIFS_NO_BUFFER;
 			/* Read header */
-		rc = CIFSSMBRead(xid, pTcon,
-				 netfid,
+		rc = CIFSSMBRead(xid, pTcon, netfid,
 				 24 /* length */, 0 /* offset */,
 				 &bytes_read, &pbuf, &buf_type);
 		if ((rc == 0) && (bytes_read >= 8)) {
 			if (memcmp("IntxBLK", pbuf, 8) == 0) {
 				cFYI(1, ("Block device"));
-				inode->i_mode |= S_IFBLK;
+				fattr->cf_mode |= S_IFBLK;
+				fattr->cf_dtype = DT_BLK;
 				if (bytes_read == 24) {
 					/* we have enough to decode dev num */
 					__u64 mjr; /* major */
 					__u64 mnr; /* minor */
 					mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 					mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
-					inode->i_rdev = MKDEV(mjr, mnr);
+					fattr->cf_rdev = MKDEV(mjr, mnr);
 				}
 			} else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 				cFYI(1, ("Char device"));
-				inode->i_mode |= S_IFCHR;
+				fattr->cf_mode |= S_IFCHR;
+				fattr->cf_dtype = DT_CHR;
 				if (bytes_read == 24) {
 					/* we have enough to decode dev num */
 					__u64 mjr; /* major */
 					__u64 mnr; /* minor */
 					mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 					mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
-					inode->i_rdev = MKDEV(mjr, mnr);
+					fattr->cf_rdev = MKDEV(mjr, mnr);
 				}
 			} else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 				cFYI(1, ("Symlink"));
-				inode->i_mode |= S_IFLNK;
+				fattr->cf_mode |= S_IFLNK;
+				fattr->cf_dtype = DT_LNK;
 			} else {
-				inode->i_mode |= S_IFREG; /* file? */
+				fattr->cf_mode |= S_IFREG; /* file? */
+				fattr->cf_dtype = DT_REG;
 				rc = -EOPNOTSUPP;
 			}
 		} else {
-			inode->i_mode |= S_IFREG; /* then it is a file */
+			fattr->cf_mode |= S_IFREG; /* then it is a file */
+			fattr->cf_dtype = DT_REG;
 			rc = -EOPNOTSUPP; /* or some unknown SFU type */
 		}
 		CIFSSMBClose(xid, pTcon, netfid);
@@ -376,9 +353,13 @@ static int decode_sfu_inode(struct inode *inode, __u64 size,
 
 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 
-static int get_sfu_mode(struct inode *inode,
-			const unsigned char *path,
-			struct cifs_sb_info *cifs_sb, int xid)
+/*
+ * Fetch mode bits as provided by SFU.
+ *
+ * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
+ */
+static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
+			 struct cifs_sb_info *cifs_sb, int xid)
 {
 #ifdef CONFIG_CIFS_XATTR
 	ssize_t rc;
@@ -386,68 +367,80 @@ static int get_sfu_mode(struct inode *inode,
 	__u32 mode;
 
 	rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
-			ea_value, 4 /* size of buf */, cifs_sb->local_nls,
-		cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+			    ea_value, 4 /* size of buf */, cifs_sb->local_nls,
+			    cifs_sb->mnt_cifs_flags &
+				CIFS_MOUNT_MAP_SPECIAL_CHR);
 	if (rc < 0)
 		return (int)rc;
 	else if (rc > 3) {
 		mode = le32_to_cpu(*((__le32 *)ea_value));
-		inode->i_mode &= ~SFBITS_MASK;
-		cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
-		inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
+		fattr->cf_mode &= ~SFBITS_MASK;
+		cFYI(1, ("special bits 0%o org mode 0%o", mode,
+			 fattr->cf_mode));
+		fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
 		cFYI(1, ("special mode bits 0%o", mode));
-		return 0;
-	} else {
-		return 0;
 	}
+
+	return 0;
 #else
 	return -EOPNOTSUPP;
 #endif
 }
 
-/*
- *	Needed to setup inode data for the directory which is the
- *	junction to the new submount (ie to setup the fake directory
- *      which represents a DFS referral)
- */
-static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
-			       struct super_block *sb)
+/* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
+void
+cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
+		       struct cifs_sb_info *cifs_sb, bool adjust_tz)
 {
-	memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
-
-/*	__le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
-	__le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
-	__u8 pfnd_dat->DeletePending = 0;
-	__u8 pfnd_data->Directory = 0;
-	__le32 pfnd_dat->EASize = 0;
-	__u64 pfnd_dat->IndexNumber = 0;
-	__u64 pfnd_dat->IndexNumber1 = 0;  */
-	pfnd_dat->CreationTime =
-		cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
-	pfnd_dat->LastAccessTime =
-		cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
-	pfnd_dat->LastWriteTime =
-		cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
-	pfnd_dat->ChangeTime =
-		cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
-	pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
-	pfnd_dat->NumberOfLinks = cpu_to_le32(2);
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
+	if (info->DeletePending)
+		fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
+
+	if (info->LastAccessTime)
+		fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
+	else
+		fattr->cf_atime = CURRENT_TIME;
+
+	fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
+	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
+
+	if (adjust_tz) {
+		fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
+		fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
+	}
+
+	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
+	fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
+
+	if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
+		fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
+		fattr->cf_dtype = DT_DIR;
+	} else {
+		fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
+		fattr->cf_dtype = DT_REG;
+	}
+
+	/* clear write bits if ATTR_READONLY is set */
+	if (fattr->cf_cifsattrs & ATTR_READONLY)
+		fattr->cf_mode &= ~(S_IWUGO);
+
+	fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
+
+	fattr->cf_uid = cifs_sb->mnt_uid;
+	fattr->cf_gid = cifs_sb->mnt_gid;
 }
 
 int cifs_get_inode_info(struct inode **pinode,
 	const unsigned char *full_path, FILE_ALL_INFO *pfindData,
 	struct super_block *sb, int xid, const __u16 *pfid)
 {
-	int rc = 0;
-	__u32 attr;
-	struct cifsInodeInfo *cifsInfo;
+	int rc = 0, tmprc;
 	struct cifsTconInfo *pTcon;
-	struct inode *inode;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 	char *buf = NULL;
 	bool adjustTZ = false;
-	bool is_dfs_referral = false;
-	umode_t default_mode;
+	struct cifs_fattr fattr;
 
 	pTcon = cifs_sb->tcon;
 	cFYI(1, ("Getting info on %s", full_path));
@@ -482,163 +475,82 @@ int cifs_get_inode_info(struct inode **pinode,
 			adjustTZ = true;
 		}
 	}
-	/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
-	if (rc == -EREMOTE) {
-		is_dfs_referral = true;
-		fill_fake_finddata(pfindData, sb);
+
+	if (!rc) {
+		cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData,
+				       cifs_sb, adjustTZ);
+	} else if (rc == -EREMOTE) {
+		cifs_create_dfs_fattr(&fattr, sb);
 		rc = 0;
-	} else if (rc)
+	} else {
 		goto cgii_exit;
+	}
 
-	attr = le32_to_cpu(pfindData->Attributes);
-
-	/* get new inode */
+	/*
+	 * If an inode wasn't passed in, then get the inode number
+	 *
+	 * Is an i_ino of zero legal? Can we use that to check if the server
+	 * supports returning inode numbers?  Are there other sanity checks we
+	 * can use to ensure that the server is really filling in that field?
+	 *
+	 * We can not use the IndexNumber field by default from Windows or
+	 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
+	 * CIFS spec claims that this value is unique within the scope of a
+	 * share, and the windows docs hint that it's actually unique
+	 * per-machine.
+	 *
+	 * There may be higher info levels that work but are there Windows
+	 * server or network appliances for which IndexNumber field is not
+	 * guaranteed unique?
+	 */
 	if (*pinode == NULL) {
-		__u64 inode_num;
-		__u64 *pinum = &inode_num;
-
-		/* Is an i_ino of zero legal? Can we use that to check
-		   if the server supports returning inode numbers?  Are
-		   there other sanity checks we can use to ensure that
-		   the server is really filling in that field? */
-
-		/* We can not use the IndexNumber field by default from
-		   Windows or Samba (in ALL_INFO buf) but we can request
-		   it explicitly.  It may not be unique presumably if
-		   the server has multiple devices mounted under one share */
-
-		/* There may be higher info levels that work but are
-		   there Windows server or network appliances for which
-		   IndexNumber field is not guaranteed unique? */
-
 		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 			int rc1 = 0;
 
 			rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
-					full_path, pinum,
+					full_path, &fattr.cf_uniqueid,
 					cifs_sb->local_nls,
 					cifs_sb->mnt_cifs_flags &
 						CIFS_MOUNT_MAP_SPECIAL_CHR);
 			if (rc1) {
-				cFYI(1, ("GetSrvInodeNum rc %d", rc1));
-				pinum = NULL;
 				/* BB EOPNOSUPP disable SERVER_INUM? */
+				cFYI(1, ("GetSrvInodeNum rc %d", rc1));
+				fattr.cf_uniqueid = iunique(sb, ROOT_I);
 			}
 		} else {
-			pinum = NULL;
+			fattr.cf_uniqueid = iunique(sb, ROOT_I);
 		}
-
-		*pinode = cifs_new_inode(sb, pinum);
-		if (*pinode == NULL) {
-			rc = -ENOMEM;
-			goto cgii_exit;
-		}
-	}
-	inode = *pinode;
-	cifsInfo = CIFS_I(inode);
-	cifsInfo->cifsAttrs = attr;
-	cifsInfo->delete_pending = pfindData->DeletePending ? true : false;
-	cFYI(1, ("Old time %ld", cifsInfo->time));
-	cifsInfo->time = jiffies;
-	cFYI(1, ("New time %ld", cifsInfo->time));
-
-	/* blksize needs to be multiple of two. So safer to default to
-	blksize and blkbits set in superblock so 2**blkbits and blksize
-	will match rather than setting to:
-	(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
-
-	/* Linux can not store file creation time so ignore it */
-	if (pfindData->LastAccessTime)
-		inode->i_atime = cifs_NTtimeToUnix(pfindData->LastAccessTime);
-	else /* do not need to use current_fs_time - time not stored */
-		inode->i_atime = CURRENT_TIME;
-	inode->i_mtime = cifs_NTtimeToUnix(pfindData->LastWriteTime);
-	inode->i_ctime = cifs_NTtimeToUnix(pfindData->ChangeTime);
-	cFYI(DBG2, ("Attributes came in as 0x%x", attr));
-	if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
-		inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
-		inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
-	}
-
-	/* get default inode mode */
-	if (attr & ATTR_DIRECTORY)
-		default_mode = cifs_sb->mnt_dir_mode;
-	else
-		default_mode = cifs_sb->mnt_file_mode;
-
-	/* set permission bits */
-	if (atomic_read(&cifsInfo->inUse) == 0 ||
-	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
-		inode->i_mode = default_mode;
-	else {
-		/* just reenable write bits if !ATTR_READONLY */
-		if ((inode->i_mode & S_IWUGO) == 0 &&
-		    (attr & ATTR_READONLY) == 0)
-			inode->i_mode |= (S_IWUGO & default_mode);
-
-		inode->i_mode &= ~S_IFMT;
-	}
-	/* clear write bits if ATTR_READONLY is set */
-	if (attr & ATTR_READONLY)
-		inode->i_mode &= ~S_IWUGO;
-
-	/* set inode type */
-	if ((attr & ATTR_SYSTEM) &&
-	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
-		/* no need to fix endianness on 0 */
-		if (pfindData->EndOfFile == 0)
-			inode->i_mode |= S_IFIFO;
-		else if (decode_sfu_inode(inode,
-				le64_to_cpu(pfindData->EndOfFile),
-				full_path, cifs_sb, xid))
-			cFYI(1, ("unknown SFU file type\n"));
 	} else {
-		if (attr & ATTR_DIRECTORY)
-			inode->i_mode |= S_IFDIR;
-		else
-			inode->i_mode |= S_IFREG;
+		fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid;
 	}
 
-	cifsInfo->server_eof = le64_to_cpu(pfindData->EndOfFile);
-	spin_lock(&inode->i_lock);
-	if (is_size_safe_to_change(cifsInfo, cifsInfo->server_eof)) {
-		/* can not safely shrink the file size here if the
-		   client is writing to it due to potential races */
-		i_size_write(inode, cifsInfo->server_eof);
-
-		/* 512 bytes (2**9) is the fake blocksize that must be
-		   used for this calculation */
-		inode->i_blocks = (512 - 1 + le64_to_cpu(
-				   pfindData->AllocationSize)) >> 9;
+	/* query for SFU type info if supported and needed */
+	if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
+	    cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+		tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
+		if (tmprc)
+			cFYI(1, ("cifs_sfu_type failed: %d", tmprc));
 	}
-	spin_unlock(&inode->i_lock);
 
-	inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
-
-	/* BB fill in uid and gid here? with help from winbind?
-	   or retrieve from NTFS stream extended attribute */
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	/* fill in 0777 bits from ACL */
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 		cFYI(1, ("Getting mode bits from ACL"));
-		acl_to_uid_mode(cifs_sb, inode, full_path, pfid);
+		cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid);
 	}
 #endif
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
-		/* fill in remaining high mode bits e.g. SUID, VTX */
-		get_sfu_mode(inode, full_path, cifs_sb, xid);
-	} else if (atomic_read(&cifsInfo->inUse) == 0) {
-		inode->i_uid = cifs_sb->mnt_uid;
-		inode->i_gid = cifs_sb->mnt_gid;
-		/* set so we do not keep refreshing these fields with
-		   bad data after user has changed them in memory */
-		atomic_set(&cifsInfo->inUse, 1);
-	}
-
-	cifs_set_ops(inode, is_dfs_referral);
-
 
+	/* fill in remaining high mode bits e.g. SUID, VTX */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
+		cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
 
+	if (!*pinode) {
+		*pinode = cifs_iget(sb, &fattr);
+		if (!*pinode)
+			rc = -ENOMEM;
+	} else {
+		cifs_fattr_to_inode(*pinode, &fattr);
+	}
 
 cgii_exit:
 	kfree(buf);
@@ -753,21 +665,14 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
 		return ERR_PTR(-ENOMEM);
 
 	xid = GetXid();
-	if (cifs_sb->tcon->unix_ext) {
+	if (cifs_sb->tcon->unix_ext)
 		rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
-		if (!inode)
-			return ERR_PTR(-ENOMEM);
-	} else {
-		inode = iget_locked(sb, ino);
-		if (!inode)
-			return ERR_PTR(-ENOMEM);
-		if (!(inode->i_state & I_NEW))
-			return inode;
-
-		rc = cifs_get_inode_info(&inode, full_path, NULL, inode->i_sb,
+	else
+		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
 						xid, NULL);
-		unlock_new_inode(inode);
-	}
+
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
 
 	if (rc && cifs_sb->tcon->ipc) {
 		cFYI(1, ("ipc connection - fake read inode"));