1 // SPDX-License-Identifier: GPL-2.0
5 #include "btree_update.h"
11 #include <linux/posix_acl.h>
13 int bch2_create_trans(struct btree_trans *trans, u64 dir_inum,
14 struct bch_inode_unpacked *dir_u,
15 struct bch_inode_unpacked *new_inode,
16 const struct qstr *name,
17 uid_t uid, gid_t gid, umode_t mode, dev_t rdev,
18 struct posix_acl *default_acl,
19 struct posix_acl *acl)
21 struct bch_fs *c = trans->c;
22 struct btree_iter *dir_iter = NULL;
23 struct btree_iter *inode_iter = NULL;
24 struct bch_hash_info hash = bch2_hash_info_init(c, new_inode);
25 u64 now = bch2_current_time(c);
26 u64 cpu = raw_smp_processor_id();
30 dir_iter = bch2_inode_peek(trans, dir_u, dir_inum, BTREE_ITER_INTENT);
31 ret = PTR_ERR_OR_ZERO(dir_iter);
35 bch2_inode_init_late(new_inode, now, uid, gid, mode, rdev, dir_u);
38 new_inode->bi_flags |= BCH_INODE_UNLINKED;
40 inode_iter = bch2_inode_create(trans, new_inode, U32_MAX, cpu);
41 ret = PTR_ERR_OR_ZERO(inode_iter);
46 ret = bch2_set_acl_trans(trans, new_inode, &hash,
47 default_acl, ACL_TYPE_DEFAULT);
53 ret = bch2_set_acl_trans(trans, new_inode, &hash,
54 acl, ACL_TYPE_ACCESS);
60 struct bch_hash_info dir_hash = bch2_hash_info_init(c, dir_u);
61 dir_u->bi_mtime = dir_u->bi_ctime = now;
63 if (S_ISDIR(new_inode->bi_mode))
66 ret = bch2_inode_write(trans, dir_iter, dir_u);
70 ret = bch2_dirent_create(trans, dir_inum, &dir_hash,
71 mode_to_type(new_inode->bi_mode),
72 name, new_inode->bi_inum,
74 BCH_HASH_SET_MUST_CREATE);
79 if (c->sb.version >= bcachefs_metadata_version_inode_backpointers) {
80 new_inode->bi_dir = dir_u->bi_inum;
81 new_inode->bi_dir_offset = dir_offset;
84 /* XXX use bch2_btree_iter_set_snapshot() */
85 inode_iter->snapshot = U32_MAX;
86 bch2_btree_iter_set_pos(inode_iter, SPOS(0, new_inode->bi_inum, U32_MAX));
88 ret = bch2_btree_iter_traverse(inode_iter) ?:
89 bch2_inode_write(trans, inode_iter, new_inode);
91 bch2_trans_iter_put(trans, inode_iter);
92 bch2_trans_iter_put(trans, dir_iter);
96 int bch2_link_trans(struct btree_trans *trans, u64 dir_inum,
97 u64 inum, struct bch_inode_unpacked *dir_u,
98 struct bch_inode_unpacked *inode_u, const struct qstr *name)
100 struct bch_fs *c = trans->c;
101 struct btree_iter *dir_iter = NULL, *inode_iter = NULL;
102 struct bch_hash_info dir_hash;
103 u64 now = bch2_current_time(c);
107 inode_iter = bch2_inode_peek(trans, inode_u, inum, BTREE_ITER_INTENT);
108 ret = PTR_ERR_OR_ZERO(inode_iter);
112 inode_u->bi_ctime = now;
113 bch2_inode_nlink_inc(inode_u);
115 dir_iter = bch2_inode_peek(trans, dir_u, dir_inum, 0);
116 ret = PTR_ERR_OR_ZERO(dir_iter);
120 dir_u->bi_mtime = dir_u->bi_ctime = now;
122 dir_hash = bch2_hash_info_init(c, dir_u);
124 ret = bch2_dirent_create(trans, dir_inum, &dir_hash,
125 mode_to_type(inode_u->bi_mode),
126 name, inum, &dir_offset,
127 BCH_HASH_SET_MUST_CREATE);
131 if (c->sb.version >= bcachefs_metadata_version_inode_backpointers) {
132 inode_u->bi_dir = dir_inum;
133 inode_u->bi_dir_offset = dir_offset;
136 ret = bch2_inode_write(trans, dir_iter, dir_u) ?:
137 bch2_inode_write(trans, inode_iter, inode_u);
139 bch2_trans_iter_put(trans, dir_iter);
140 bch2_trans_iter_put(trans, inode_iter);
144 int bch2_unlink_trans(struct btree_trans *trans,
145 u64 dir_inum, struct bch_inode_unpacked *dir_u,
146 struct bch_inode_unpacked *inode_u,
147 const struct qstr *name)
149 struct bch_fs *c = trans->c;
150 struct btree_iter *dir_iter = NULL, *dirent_iter = NULL,
152 struct bch_hash_info dir_hash;
153 u64 inum, now = bch2_current_time(c);
157 dir_iter = bch2_inode_peek(trans, dir_u, dir_inum, BTREE_ITER_INTENT);
158 ret = PTR_ERR_OR_ZERO(dir_iter);
162 dir_hash = bch2_hash_info_init(c, dir_u);
164 dirent_iter = __bch2_dirent_lookup_trans(trans, dir_inum, &dir_hash,
165 name, BTREE_ITER_INTENT);
166 ret = PTR_ERR_OR_ZERO(dirent_iter);
170 k = bch2_btree_iter_peek_slot(dirent_iter);
171 inum = le64_to_cpu(bkey_s_c_to_dirent(k).v->d_inum);
173 inode_iter = bch2_inode_peek(trans, inode_u, inum, BTREE_ITER_INTENT);
174 ret = PTR_ERR_OR_ZERO(inode_iter);
178 if (inode_u->bi_dir == k.k->p.inode &&
179 inode_u->bi_dir_offset == k.k->p.offset) {
181 inode_u->bi_dir_offset = 0;
184 dir_u->bi_mtime = dir_u->bi_ctime = inode_u->bi_ctime = now;
185 dir_u->bi_nlink -= S_ISDIR(inode_u->bi_mode);
186 bch2_inode_nlink_dec(inode_u);
188 ret = (S_ISDIR(inode_u->bi_mode)
189 ? bch2_empty_dir_trans(trans, inum)
191 bch2_dirent_delete_at(trans, &dir_hash, dirent_iter) ?:
192 bch2_inode_write(trans, dir_iter, dir_u) ?:
193 bch2_inode_write(trans, inode_iter, inode_u);
195 bch2_trans_iter_put(trans, inode_iter);
196 bch2_trans_iter_put(trans, dirent_iter);
197 bch2_trans_iter_put(trans, dir_iter);
201 bool bch2_reinherit_attrs(struct bch_inode_unpacked *dst_u,
202 struct bch_inode_unpacked *src_u)
208 for (id = 0; id < Inode_opt_nr; id++) {
209 if (dst_u->bi_fields_set & (1 << id))
212 src = bch2_inode_opt_get(src_u, id);
213 dst = bch2_inode_opt_get(dst_u, id);
218 bch2_inode_opt_set(dst_u, id, src);
225 int bch2_rename_trans(struct btree_trans *trans,
226 u64 src_dir, struct bch_inode_unpacked *src_dir_u,
227 u64 dst_dir, struct bch_inode_unpacked *dst_dir_u,
228 struct bch_inode_unpacked *src_inode_u,
229 struct bch_inode_unpacked *dst_inode_u,
230 const struct qstr *src_name,
231 const struct qstr *dst_name,
232 enum bch_rename_mode mode)
234 struct bch_fs *c = trans->c;
235 struct btree_iter *src_dir_iter = NULL, *dst_dir_iter = NULL;
236 struct btree_iter *src_inode_iter = NULL, *dst_inode_iter = NULL;
237 struct bch_hash_info src_hash, dst_hash;
238 u64 src_inode, src_offset, dst_inode, dst_offset;
239 u64 now = bch2_current_time(c);
242 src_dir_iter = bch2_inode_peek(trans, src_dir_u, src_dir,
244 ret = PTR_ERR_OR_ZERO(src_dir_iter);
248 src_hash = bch2_hash_info_init(c, src_dir_u);
250 if (dst_dir != src_dir) {
251 dst_dir_iter = bch2_inode_peek(trans, dst_dir_u, dst_dir,
253 ret = PTR_ERR_OR_ZERO(dst_dir_iter);
257 dst_hash = bch2_hash_info_init(c, dst_dir_u);
259 dst_dir_u = src_dir_u;
263 ret = bch2_dirent_rename(trans,
266 src_name, &src_inode, &src_offset,
267 dst_name, &dst_inode, &dst_offset,
272 src_inode_iter = bch2_inode_peek(trans, src_inode_u, src_inode,
274 ret = PTR_ERR_OR_ZERO(src_inode_iter);
279 dst_inode_iter = bch2_inode_peek(trans, dst_inode_u, dst_inode,
281 ret = PTR_ERR_OR_ZERO(dst_inode_iter);
286 if (c->sb.version >= bcachefs_metadata_version_inode_backpointers) {
287 src_inode_u->bi_dir = dst_dir_u->bi_inum;
288 src_inode_u->bi_dir_offset = dst_offset;
290 if (mode == BCH_RENAME_EXCHANGE) {
291 dst_inode_u->bi_dir = src_dir_u->bi_inum;
292 dst_inode_u->bi_dir_offset = src_offset;
295 if (mode == BCH_RENAME_OVERWRITE &&
296 dst_inode_u->bi_dir == dst_dir_u->bi_inum &&
297 dst_inode_u->bi_dir_offset == src_offset) {
298 dst_inode_u->bi_dir = 0;
299 dst_inode_u->bi_dir_offset = 0;
303 if (mode == BCH_RENAME_OVERWRITE) {
304 if (S_ISDIR(src_inode_u->bi_mode) !=
305 S_ISDIR(dst_inode_u->bi_mode)) {
310 if (S_ISDIR(dst_inode_u->bi_mode) &&
311 bch2_empty_dir_trans(trans, dst_inode)) {
317 if (bch2_reinherit_attrs(src_inode_u, dst_dir_u) &&
318 S_ISDIR(src_inode_u->bi_mode)) {
323 if (mode == BCH_RENAME_EXCHANGE &&
324 bch2_reinherit_attrs(dst_inode_u, src_dir_u) &&
325 S_ISDIR(dst_inode_u->bi_mode)) {
330 if (S_ISDIR(src_inode_u->bi_mode)) {
331 src_dir_u->bi_nlink--;
332 dst_dir_u->bi_nlink++;
335 if (dst_inode && S_ISDIR(dst_inode_u->bi_mode)) {
336 dst_dir_u->bi_nlink--;
337 src_dir_u->bi_nlink += mode == BCH_RENAME_EXCHANGE;
340 if (mode == BCH_RENAME_OVERWRITE)
341 bch2_inode_nlink_dec(dst_inode_u);
343 src_dir_u->bi_mtime = now;
344 src_dir_u->bi_ctime = now;
346 if (src_dir != dst_dir) {
347 dst_dir_u->bi_mtime = now;
348 dst_dir_u->bi_ctime = now;
351 src_inode_u->bi_ctime = now;
354 dst_inode_u->bi_ctime = now;
356 ret = bch2_inode_write(trans, src_dir_iter, src_dir_u) ?:
358 ? bch2_inode_write(trans, dst_dir_iter, dst_dir_u)
360 bch2_inode_write(trans, src_inode_iter, src_inode_u) ?:
362 ? bch2_inode_write(trans, dst_inode_iter, dst_inode_u)
365 bch2_trans_iter_put(trans, dst_inode_iter);
366 bch2_trans_iter_put(trans, src_inode_iter);
367 bch2_trans_iter_put(trans, dst_dir_iter);
368 bch2_trans_iter_put(trans, src_dir_iter);