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Commit 08cefc7a authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

userns: Convert ext4 to user kuid/kgid where appropriate 



Acked-by: default avatarSerge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 1523299d

fs/ext4/balloc.c

+2 −2
Original line number Diff line number Diff line
@@ -461,8 +461,8 @@ static int ext4_has_free_clusters(struct ext4_sb_info *sbi, 
		return 1;



	/* Hm, nope.  Are (enough) root reserved clusters available? */

	if (sbi->s_resuid == current_fsuid() ||

	    ((sbi->s_resgid != 0) && in_group_p(sbi->s_resgid)) ||

	if (uid_eq(sbi->s_resuid, current_fsuid()) ||

	    (!gid_eq(sbi->s_resgid, GLOBAL_ROOT_GID) && in_group_p(sbi->s_resgid)) ||

	    capable(CAP_SYS_RESOURCE) ||

		(flags & EXT4_MB_USE_ROOT_BLOCKS)) {

fs/ext4/ext4.h

+2 −2
Original line number Diff line number Diff line
@@ -1153,8 +1153,8 @@ struct ext4_sb_info { 
	unsigned int s_mount_flags;

	unsigned int s_def_mount_opt;

	ext4_fsblk_t s_sb_block;

	uid_t s_resuid;

	gid_t s_resgid;

	kuid_t s_resuid;

	kgid_t s_resgid;

	unsigned short s_mount_state;

	unsigned short s_pad;

	int s_addr_per_block_bits;

fs/ext4/ialloc.c

+2 −2
Original line number Diff line number Diff line
@@ -808,8 +808,8 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, umode_t mode, 
	}

	if (owner) {

		inode->i_mode = mode;

		inode->i_uid = owner[0];

		inode->i_gid = owner[1];

		i_uid_write(inode, owner[0]);

		i_gid_write(inode, owner[1]);

	} else if (test_opt(sb, GRPID)) {

		inode->i_mode = mode;

		inode->i_uid = current_fsuid();

fs/ext4/inode.c

+20 −14
Original line number Diff line number Diff line
@@ -3630,6 +3630,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) 
	journal_t *journal = EXT4_SB(sb)->s_journal;

	long ret;

	int block;

	uid_t i_uid;

	gid_t i_gid;



	inode = iget_locked(sb, ino);

	if (!inode)
@@ -3645,12 +3647,14 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) 
		goto bad_inode;

	raw_inode = ext4_raw_inode(&iloc);

	inode->i_mode = le16_to_cpu(raw_inode->i_mode);

	inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);

	inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);

	i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);

	i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);

	if (!(test_opt(inode->i_sb, NO_UID32))) {

		inode->i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;

		inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;

		i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;

		i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;

	}

	i_uid_write(inode, i_uid);

	i_gid_write(inode, i_gid);

	set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));



	ext4_clear_state_flags(ei);	/* Only relevant on 32-bit archs */
@@ -3870,6 +3874,8 @@ static int ext4_do_update_inode(handle_t *handle, 
	struct ext4_inode_info *ei = EXT4_I(inode);

	struct buffer_head *bh = iloc->bh;

	int err = 0, rc, block;

	uid_t i_uid;

	gid_t i_gid;



	/* For fields not not tracking in the in-memory inode,

	 * initialise them to zero for new inodes. */
@@ -3878,27 +3884,27 @@ static int ext4_do_update_inode(handle_t *handle, 


	ext4_get_inode_flags(ei);

	raw_inode->i_mode = cpu_to_le16(inode->i_mode);

	i_uid = i_uid_read(inode);

	i_gid = i_gid_read(inode);

	if (!(test_opt(inode->i_sb, NO_UID32))) {

		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(inode->i_uid));

		raw_inode->i_gid_low = cpu_to_le16(low_16_bits(inode->i_gid));

		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));

		raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));

/*

 * Fix up interoperability with old kernels. Otherwise, old inodes get

 * re-used with the upper 16 bits of the uid/gid intact

 */

		if (!ei->i_dtime) {

			raw_inode->i_uid_high =

				cpu_to_le16(high_16_bits(inode->i_uid));

				cpu_to_le16(high_16_bits(i_uid));

			raw_inode->i_gid_high =

				cpu_to_le16(high_16_bits(inode->i_gid));

				cpu_to_le16(high_16_bits(i_gid));

		} else {

			raw_inode->i_uid_high = 0;

			raw_inode->i_gid_high = 0;

		}

	} else {

		raw_inode->i_uid_low =

			cpu_to_le16(fs_high2lowuid(inode->i_uid));

		raw_inode->i_gid_low =

			cpu_to_le16(fs_high2lowgid(inode->i_gid));

		raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));

		raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));

		raw_inode->i_uid_high = 0;

		raw_inode->i_gid_high = 0;

	}
@@ -4084,8 +4090,8 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) 


	if (is_quota_modification(inode, attr))

		dquot_initialize(inode);

	if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||

		(ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {

	if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||

	    (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {

		handle_t *handle;



		/* (user+group)*(old+new) structure, inode write (sb,

fs/ext4/migrate.c

+2 −2
Original line number Diff line number Diff line
@@ -466,8 +466,8 @@ int ext4_ext_migrate(struct inode *inode) 
	}

	goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) *

		EXT4_INODES_PER_GROUP(inode->i_sb)) + 1;

	owner[0] = inode->i_uid;

	owner[1] = inode->i_gid;

	owner[0] = i_uid_read(inode);

	owner[1] = i_gid_read(inode);

	tmp_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,

				   S_IFREG, NULL, goal, owner);

	if (IS_ERR(tmp_inode)) {