diff options
| author | Sasha Finkelstein <fnkl.kernel@gmail.com> | 2024-08-18 19:09:02 +0200 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-09-21 11:35:20 -0400 |
| commit | 4645855df01eda7c421c182515215682e0451b9b (patch) | |
| tree | f0df23e33ca4b2f70a6adde3c972103413bd49b8 /fs/bcachefs/fs.c | |
| parent | d90c8acd351c042f4bf1676e71c3f80fb3492403 (diff) | |
bcachefs: Hook up RENAME_WHITEOUT in rename.
This is needed for overlayfs, which is used by container managers.
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/fs.c')
| -rw-r--r-- | fs/bcachefs/fs.c | 53 |
1 files changed, 42 insertions, 11 deletions
diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c index 866ce1f1a6d1..dfadfb82399f 100644 --- a/fs/bcachefs/fs.c +++ b/fs/bcachefs/fs.c @@ -736,15 +736,16 @@ static int bch2_rename2(struct mnt_idmap *idmap, struct bch_inode_info *src_inode = to_bch_ei(src_dentry->d_inode); struct bch_inode_info *dst_inode = to_bch_ei(dst_dentry->d_inode); struct bch_inode_unpacked dst_dir_u, src_dir_u; - struct bch_inode_unpacked src_inode_u, dst_inode_u; + struct bch_inode_unpacked src_inode_u, dst_inode_u, *whiteout_inode_u; struct btree_trans *trans; enum bch_rename_mode mode = flags & RENAME_EXCHANGE ? BCH_RENAME_EXCHANGE : dst_dentry->d_inode ? BCH_RENAME_OVERWRITE : BCH_RENAME; + bool whiteout = !!(flags & RENAME_WHITEOUT); int ret; - if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE)) + if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE|RENAME_WHITEOUT)) return -EINVAL; if (mode == BCH_RENAME_OVERWRITE) { @@ -785,18 +786,48 @@ static int bch2_rename2(struct mnt_idmap *idmap, if (ret) goto err; } +retry: + bch2_trans_begin(trans); - ret = commit_do(trans, NULL, NULL, 0, - bch2_rename_trans(trans, - inode_inum(src_dir), &src_dir_u, - inode_inum(dst_dir), &dst_dir_u, - &src_inode_u, - &dst_inode_u, - &src_dentry->d_name, - &dst_dentry->d_name, - mode)); + ret = bch2_rename_trans(trans, + inode_inum(src_dir), &src_dir_u, + inode_inum(dst_dir), &dst_dir_u, + &src_inode_u, + &dst_inode_u, + &src_dentry->d_name, + &dst_dentry->d_name, + mode); if (unlikely(ret)) + goto err_tx_restart; + + if (whiteout) { + whiteout_inode_u = bch2_trans_kmalloc_nomemzero(trans, sizeof(*whiteout_inode_u)); + ret = PTR_ERR_OR_ZERO(whiteout_inode_u); + if (unlikely(ret)) + goto err_tx_restart; + bch2_inode_init_early(c, whiteout_inode_u); + + ret = bch2_create_trans(trans, + inode_inum(src_dir), &src_dir_u, + whiteout_inode_u, + &src_dentry->d_name, + from_kuid(i_user_ns(&src_dir->v), current_fsuid()), + from_kgid(i_user_ns(&src_dir->v), current_fsgid()), + S_IFCHR|WHITEOUT_MODE, 0, + NULL, NULL, (subvol_inum) { 0 }, 0) ?: + bch2_quota_acct(c, bch_qid(whiteout_inode_u), Q_INO, 1, + KEY_TYPE_QUOTA_PREALLOC); + if (unlikely(ret)) + goto err_tx_restart; + } + + ret = bch2_trans_commit(trans, NULL, NULL, 0); + if (unlikely(ret)) { +err_tx_restart: + if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) + goto retry; goto err; + } BUG_ON(src_inode->v.i_ino != src_inode_u.bi_inum); BUG_ON(dst_inode && |