xfs: Remove all strlen in all xfs_attr_* functions for attr names.

This helps to pre-simplify the extra handling of the null terminator in
delayed operations which use memcpy rather than strlen.  Later
when we introduce parent pointers, attribute names will become binary,
so strlen will not work at all.  Removing uses of strlen now will
help reduce complexities later

Signed-off-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

6 files changed, 41 insertions, 20 deletions

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 2368a1bfe7e8..e6149720ce02 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -62,6 +62,7 @@ xfs_attr_args_init(
 	struct xfs_da_args	*args,
 	struct xfs_inode	*dp,
 	const unsigned char	*name,
+	size_t			namelen,
 	int			flags)
 {
 
@@ -74,7 +75,7 @@ xfs_attr_args_init(
 	args->dp = dp;
 	args->flags = flags;
 	args->name = name;
-	args->namelen = strlen((const char *)name);
+	args->namelen = namelen;
 	if (args->namelen >= MAXNAMELEN)
 		return -EFAULT;		/* match IRIX behaviour */
 
@@ -139,6 +140,7 @@ int
 xfs_attr_get(
 	struct xfs_inode	*ip,
 	const unsigned char	*name,
+	size_t			namelen,
 	unsigned char		**value,
 	int			*valuelenp,
 	int			flags)
@@ -154,7 +156,7 @@ xfs_attr_get(
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
 		return -EIO;
 
-	error = xfs_attr_args_init(&args, ip, name, flags);
+	error = xfs_attr_args_init(&args, ip, name, namelen, flags);
 	if (error)
 		return error;
 
@@ -338,6 +340,7 @@ int
 xfs_attr_set(
 	struct xfs_inode	*dp,
 	const unsigned char	*name,
+	size_t			namelen,
 	unsigned char		*value,
 	int			valuelen,
 	int			flags)
@@ -353,7 +356,7 @@ xfs_attr_set(
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return -EIO;
 
-	error = xfs_attr_args_init(&args, dp, name, flags);
+	error = xfs_attr_args_init(&args, dp, name, namelen, flags);
 	if (error)
 		return error;
 
@@ -442,6 +445,7 @@ int
 xfs_attr_remove(
 	struct xfs_inode	*dp,
 	const unsigned char	*name,
+	size_t			namelen,
 	int			flags)
 {
 	struct xfs_mount	*mp = dp->i_mount;
@@ -453,7 +457,7 @@ xfs_attr_remove(
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return -EIO;
 
-	error = xfs_attr_args_init(&args, dp, name, flags);
+	error = xfs_attr_args_init(&args, dp, name, namelen, flags);
 	if (error)
 		return error;
 
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 91c2cb14276e..4243b2272642 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -148,11 +148,13 @@ int xfs_attr_list_int(struct xfs_attr_list_context *);
 int xfs_inode_hasattr(struct xfs_inode *ip);
 int xfs_attr_get_ilocked(struct xfs_inode *ip, struct xfs_da_args *args);
 int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
-		 unsigned char **value, int *valuelenp, int flags);
+		 size_t namelen, unsigned char **value, int *valuelenp,
+		 int flags);
 int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
-		 unsigned char *value, int valuelen, int flags);
+		 size_t namelen, unsigned char *value, int valuelen, int flags);
 int xfs_attr_set_args(struct xfs_da_args *args);
-int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
+int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name,
+		    size_t namelen, int flags);
 int xfs_attr_remove_args(struct xfs_da_args *args);
 int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
 		  int flags, struct attrlist_cursor_kern *cursor);
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 91693fce34a8..cd743fad8478 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -145,7 +145,8 @@ xfs_get_acl(struct inode *inode, int type)
 	 * go out to the disk.
 	 */
 	len = XFS_ACL_MAX_SIZE(ip->i_mount);
-	error = xfs_attr_get(ip, ea_name, (unsigned char **)&xfs_acl, &len,
+	error = xfs_attr_get(ip, ea_name, strlen(ea_name),
+				(unsigned char **)&xfs_acl, &len,
 				ATTR_ALLOC | ATTR_ROOT);
 	if (error) {
 		/*
@@ -196,15 +197,17 @@ __xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 		len -= sizeof(struct xfs_acl_entry) *
 			 (XFS_ACL_MAX_ENTRIES(ip->i_mount) - acl->a_count);
 
-		error = xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl,
-				len, ATTR_ROOT);
+		error = xfs_attr_set(ip, ea_name, strlen(ea_name),
+				     (unsigned char *)xfs_acl, len, ATTR_ROOT);
 
 		kmem_free(xfs_acl);
 	} else {
 		/*
 		 * A NULL ACL argument means we want to remove the ACL.
 		 */
-		error = xfs_attr_remove(ip, ea_name, ATTR_ROOT);
+		error = xfs_attr_remove(ip, ea_name,
+					strlen(ea_name),
+					ATTR_ROOT);
 
 		/*
 		 * If the attribute didn't exist to start with that's fine.
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 17b4a981be4d..d42de92cb283 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -357,6 +357,7 @@ xfs_attrmulti_attr_get(
 {
 	unsigned char		*kbuf;
 	int			error = -EFAULT;
+	size_t			namelen;
 
 	if (*len > XFS_XATTR_SIZE_MAX)
 		return -EINVAL;
@@ -364,7 +365,9 @@ xfs_attrmulti_attr_get(
 	if (!kbuf)
 		return -ENOMEM;
 
-	error = xfs_attr_get(XFS_I(inode), name, &kbuf, (int *)len, flags);
+	namelen = strlen(name);
+	error = xfs_attr_get(XFS_I(inode), name, namelen, &kbuf, (int *)len,
+			     flags);
 	if (error)
 		goto out_kfree;
 
@@ -386,6 +389,7 @@ xfs_attrmulti_attr_set(
 {
 	unsigned char		*kbuf;
 	int			error;
+	size_t			namelen;
 
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		return -EPERM;
@@ -396,7 +400,8 @@ xfs_attrmulti_attr_set(
 	if (IS_ERR(kbuf))
 		return PTR_ERR(kbuf);
 
-	error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
+	namelen = strlen(name);
+	error = xfs_attr_set(XFS_I(inode), name, namelen, kbuf, len, flags);
 	if (!error)
 		xfs_forget_acl(inode, name, flags);
 	kfree(kbuf);
@@ -410,10 +415,12 @@ xfs_attrmulti_attr_remove(
 	uint32_t		flags)
 {
 	int			error;
+	size_t			namelen;
 
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		return -EPERM;
-	error = xfs_attr_remove(XFS_I(inode), name, flags);
+	namelen = strlen(name);
+	error = xfs_attr_remove(XFS_I(inode), name, namelen, flags);
 	if (!error)
 		xfs_forget_acl(inode, name, flags);
 	return error;
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 8afe69ca188b..81f2f93caec0 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -50,8 +50,10 @@ xfs_initxattrs(
 	int			error = 0;
 
 	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
-		error = xfs_attr_set(ip, xattr->name, xattr->value,
-				      xattr->value_len, ATTR_SECURE);
+		error = xfs_attr_set(ip, xattr->name,
+				     strlen(xattr->name),
+				     xattr->value, xattr->value_len,
+				     ATTR_SECURE);
 		if (error < 0)
 			break;
 	}
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 2288f20ae282..b0fedb543f97 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -24,6 +24,7 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
 	int xflags = handler->flags;
 	struct xfs_inode *ip = XFS_I(inode);
 	int error, asize = size;
+	size_t namelen = strlen(name);
 
 	/* Convert Linux syscall to XFS internal ATTR flags */
 	if (!size) {
@@ -31,7 +32,8 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
 		value = NULL;
 	}
 
-	error = xfs_attr_get(ip, name, (unsigned char **)&value, &asize, xflags);
+	error = xfs_attr_get(ip, name, namelen, (unsigned char **)&value,
+			     &asize, xflags);
 	if (error)
 		return error;
 	return asize;
@@ -67,6 +69,7 @@ xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused,
 	int			xflags = handler->flags;
 	struct xfs_inode	*ip = XFS_I(inode);
 	int			error;
+	size_t			namelen = strlen(name);
 
 	/* Convert Linux syscall to XFS internal ATTR flags */
 	if (flags & XATTR_CREATE)
@@ -75,10 +78,10 @@ xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused,
 		xflags |= ATTR_REPLACE;
 
 	if (value)
-		error = xfs_attr_set(ip, (unsigned char *)name,
-				(void *)value, size, xflags);
+		error = xfs_attr_set(ip, name, namelen, (void *)value, size,
+				xflags);
 	else
-		error = xfs_attr_remove(ip, (unsigned char *)name, xflags);
+		error = xfs_attr_remove(ip, name, namelen, xflags);
 	if (!error)
 		xfs_forget_acl(inode, name, xflags);