userns: Convert jfs to use kuid/kgid where appropriate

Cc: Dave Kleikamp <shaggy@kernel.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

4 files changed, 33 insertions, 23 deletions

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 844f946..9d3afd1 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -108,8 +108,8 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 
 	if (is_quota_modification(inode, iattr))
 		dquot_initialize(inode);
-	if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
-	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
+	if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
+	    (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
 		rc = dquot_transfer(inode, iattr);
 		if (rc)
 			return rc;
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 1b6f15f..6ba4006 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -3078,15 +3078,15 @@ static int copy_from_dinode(struct dinode * dip, struct inode *ip)
 	}
 	set_nlink(ip, le32_to_cpu(dip->di_nlink));
 
-	jfs_ip->saved_uid = le32_to_cpu(dip->di_uid);
-	if (sbi->uid == -1)
+	jfs_ip->saved_uid = make_kuid(&init_user_ns, le32_to_cpu(dip->di_uid));
+	if (!uid_valid(sbi->uid))
 		ip->i_uid = jfs_ip->saved_uid;
 	else {
 		ip->i_uid = sbi->uid;
 	}
 
-	jfs_ip->saved_gid = le32_to_cpu(dip->di_gid);
-	if (sbi->gid == -1)
+	jfs_ip->saved_gid = make_kgid(&init_user_ns, le32_to_cpu(dip->di_gid));
+	if (!gid_valid(sbi->gid))
 		ip->i_gid = jfs_ip->saved_gid;
 	else {
 		ip->i_gid = sbi->gid;
@@ -3150,14 +3150,16 @@ static void copy_to_dinode(struct dinode * dip, struct inode *ip)
 	dip->di_size = cpu_to_le64(ip->i_size);
 	dip->di_nblocks = cpu_to_le64(PBLK2LBLK(ip->i_sb, ip->i_blocks));
 	dip->di_nlink = cpu_to_le32(ip->i_nlink);
-	if (sbi->uid == -1)
-		dip->di_uid = cpu_to_le32(ip->i_uid);
+	if (!uid_valid(sbi->uid))
+		dip->di_uid = cpu_to_le32(i_uid_read(ip));
 	else
-		dip->di_uid = cpu_to_le32(jfs_ip->saved_uid);
-	if (sbi->gid == -1)
-		dip->di_gid = cpu_to_le32(ip->i_gid);
+		dip->di_uid =cpu_to_le32(from_kuid(&init_user_ns,
+						   jfs_ip->saved_uid));
+	if (!gid_valid(sbi->gid))
+		dip->di_gid = cpu_to_le32(i_gid_read(ip));
 	else
-		dip->di_gid = cpu_to_le32(jfs_ip->saved_gid);
+		dip->di_gid = cpu_to_le32(from_kgid(&init_user_ns,
+						    jfs_ip->saved_gid));
 	jfs_get_inode_flags(jfs_ip);
 	/*
 	 * mode2 is only needed for storing the higher order bits.
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index 584a4a1..680605d 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -38,8 +38,8 @@
 struct jfs_inode_info {
 	int	fileset;	/* fileset number (always 16)*/
 	uint	mode2;		/* jfs-specific mode		*/
-	uint	saved_uid;	/* saved for uid mount option */
-	uint	saved_gid;	/* saved for gid mount option */
+	kuid_t	saved_uid;	/* saved for uid mount option */
+	kgid_t	saved_gid;	/* saved for gid mount option */
 	pxd_t	ixpxd;		/* inode extent descriptor	*/
 	dxd_t	acl;		/* dxd describing acl	*/
 	dxd_t	ea;		/* dxd describing ea	*/
@@ -192,8 +192,8 @@ struct jfs_sb_info {
 	uint		state;		/* mount/recovery state	*/
 	unsigned long	flag;		/* mount time flags */
 	uint		p_state;	/* state prior to going no integrity */
-	uint		uid;		/* uid to override on-disk uid */
-	uint		gid;		/* gid to override on-disk gid */
+	kuid_t		uid;		/* uid to override on-disk uid */
+	kgid_t		gid;		/* gid to override on-disk gid */
 	uint		umask;		/* umask to override on-disk umask */
 };
 
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index c55c745..706692f 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -321,13 +321,19 @@ static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
 		case Opt_uid:
 		{
 			char *uid = args[0].from;
-			sbi->uid = simple_strtoul(uid, &uid, 0);
+			uid_t val = simple_strtoul(uid, &uid, 0);
+			sbi->uid = make_kuid(current_user_ns(), val);
+			if (!uid_valid(sbi->uid))
+				goto cleanup;
 			break;
 		}
 		case Opt_gid:
 		{
 			char *gid = args[0].from;
-			sbi->gid = simple_strtoul(gid, &gid, 0);
+			gid_t val = simple_strtoul(gid, &gid, 0);
+			sbi->gid = make_kgid(current_user_ns(), val);
+			if (!gid_valid(sbi->gid))
+				goto cleanup;
 			break;
 		}
 		case Opt_umask:
@@ -443,7 +449,9 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_fs_info = sbi;
 	sb->s_max_links = JFS_LINK_MAX;
 	sbi->sb = sb;
-	sbi->uid = sbi->gid = sbi->umask = -1;
+	sbi->uid = INVALID_UID;
+	sbi->gid = INVALID_GID;
+	sbi->umask = -1;
 
 	/* initialize the mount flag and determine the default error handler */
 	flag = JFS_ERR_REMOUNT_RO;
@@ -617,10 +625,10 @@ static int jfs_show_options(struct seq_file *seq, struct dentry *root)
 {
 	struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);
 
-	if (sbi->uid != -1)
-		seq_printf(seq, ",uid=%d", sbi->uid);
-	if (sbi->gid != -1)
-		seq_printf(seq, ",gid=%d", sbi->gid);
+	if (uid_valid(sbi->uid))
+		seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid));
+	if (gid_valid(sbi->gid))
+		seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid));
 	if (sbi->umask != -1)
 		seq_printf(seq, ",umask=%03o", sbi->umask);
 	if (sbi->flag & JFS_NOINTEGRITY)