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btrfs: handle idmaps in btrfs_new_inode()

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Extend btrfs_new_inode() to take the idmapped mount into account when
initializing a new inode. This is just a matter of passing down the
mount's userns. The rest is taken care of in inode_init_owner(). This is
a preliminary patch to make the individual btrfs inode operations
idmapped mount aware.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christian Brauner 2021-07-27 12:48:41 +02:00 committed by David Sterba
parent c2fd68b6b2
commit b3b6f5b922
1 changed files with 19 additions and 15 deletions
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34
fs/btrfs/inode.c
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@ -6422,6 +6422,7 @@ static void btrfs_inherit_iflags(struct inode *inode, struct inode *dir)
static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct user_namespace *mnt_userns,
struct inode *dir,
const char *name, int name_len,
u64 ref_objectid, u64 objectid,
@ -6531,7 +6532,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
if (ret != 0)
goto fail_unlock;
inode_init_owner(&init_user_ns, inode, dir, mode);
inode_init_owner(mnt_userns, inode, dir, mode);
inode_set_bytes(inode, 0);
inode->i_mtime = current_time(inode);
@ -6716,9 +6717,9 @@ static int btrfs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
if (err)
goto out_unlock;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(BTRFS_I(dir)), objectid,
mode, &index);
inode = btrfs_new_inode(trans, root, &init_user_ns, dir,
dentry->d_name.name, dentry->d_name.len,
btrfs_ino(BTRFS_I(dir)), objectid, mode, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
inode = NULL;
@ -6780,9 +6781,9 @@ static int btrfs_create(struct user_namespace *mnt_userns, struct inode *dir,
if (err)
goto out_unlock;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(BTRFS_I(dir)), objectid,
mode, &index);
inode = btrfs_new_inode(trans, root, &init_user_ns, dir,
dentry->d_name.name, dentry->d_name.len,
btrfs_ino(BTRFS_I(dir)), objectid, mode, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
inode = NULL;
@ -6925,8 +6926,9 @@ static int btrfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
if (err)
goto out_fail;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(BTRFS_I(dir)), objectid,
inode = btrfs_new_inode(trans, root, &init_user_ns, dir,
dentry->d_name.name, dentry->d_name.len,
btrfs_ino(BTRFS_I(dir)), objectid,
S_IFDIR | mode, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
@ -9038,7 +9040,8 @@ int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
if (err < 0)
return err;
inode = btrfs_new_inode(trans, new_root, NULL, "..", 2, ino, ino,
inode = btrfs_new_inode(trans, new_root, &init_user_ns, NULL, "..", 2,
ino, ino,
S_IFDIR | (~current_umask() & S_IRWXUGO),
&index);
if (IS_ERR(inode))
@ -9559,7 +9562,7 @@ static int btrfs_whiteout_for_rename(struct btrfs_trans_handle *trans,
if (ret)
return ret;
inode = btrfs_new_inode(trans, root, dir,
inode = btrfs_new_inode(trans, root, &init_user_ns, dir,
dentry->d_name.name,
dentry->d_name.len,
btrfs_ino(BTRFS_I(dir)),
@ -10071,9 +10074,10 @@ static int btrfs_symlink(struct user_namespace *mnt_userns, struct inode *dir,
if (err)
goto out_unlock;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(BTRFS_I(dir)),
objectid, S_IFLNK|S_IRWXUGO, &index);
inode = btrfs_new_inode(trans, root, &init_user_ns, dir,
dentry->d_name.name, dentry->d_name.len,
btrfs_ino(BTRFS_I(dir)), objectid,
S_IFLNK | S_IRWXUGO, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
inode = NULL;
@ -10422,7 +10426,7 @@ static int btrfs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
if (ret)
goto out;
inode = btrfs_new_inode(trans, root, dir, NULL, 0,
inode = btrfs_new_inode(trans, root, &init_user_ns, dir, NULL, 0,
btrfs_ino(BTRFS_I(dir)), objectid, mode, &index);
if (IS_ERR(inode)) {
ret = PTR_ERR(inode);