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Diffstat (limited to 'libbcachefs/acl.c')
-rw-r--r--libbcachefs/acl.c147
1 files changed, 112 insertions, 35 deletions
diff --git a/libbcachefs/acl.c b/libbcachefs/acl.c
index a8735bc0..534ea94e 100644
--- a/libbcachefs/acl.c
+++ b/libbcachefs/acl.c
@@ -132,7 +132,8 @@ invalid:
* Convert from in-memory to filesystem representation.
*/
static struct bkey_i_xattr *
-bch2_acl_to_xattr(const struct posix_acl *acl,
+bch2_acl_to_xattr(struct btree_trans *trans,
+ const struct posix_acl *acl,
int type)
{
struct bkey_i_xattr *xattr;
@@ -164,7 +165,7 @@ bch2_acl_to_xattr(const struct posix_acl *acl,
if (u64s > U8_MAX)
return ERR_PTR(-E2BIG);
- xattr = kmalloc(u64s * sizeof(u64), GFP_KERNEL);
+ xattr = bch2_trans_kmalloc(trans, u64s * sizeof(u64));
if (IS_ERR(xattr))
return xattr;
@@ -214,20 +215,29 @@ struct posix_acl *bch2_get_acl(struct inode *vinode, int type)
{
struct bch_inode_info *inode = to_bch_ei(vinode);
struct bch_fs *c = inode->v.i_sb->s_fs_info;
- struct btree_iter iter;
+ struct btree_trans trans;
+ struct btree_iter *iter;
struct bkey_s_c_xattr xattr;
- struct bkey_s_c k;
struct posix_acl *acl = NULL;
- int name_index = acl_to_xattr_type(type);
- k = bch2_xattr_get_iter(c, &iter, inode, "", name_index);
- if (IS_ERR(k.k)) {
- if (PTR_ERR(k.k) != -ENOENT)
- acl = ERR_CAST(k.k);
+ bch2_trans_init(&trans, c);
+retry:
+ bch2_trans_begin(&trans);
+
+ iter = bch2_hash_lookup(&trans, bch2_xattr_hash_desc,
+ &inode->ei_str_hash, inode->v.i_ino,
+ &X_SEARCH(acl_to_xattr_type(type), "", 0),
+ 0);
+ if (IS_ERR(iter)) {
+ if (PTR_ERR(iter) == -EINTR)
+ goto retry;
+
+ if (PTR_ERR(iter) != -ENOENT)
+ acl = ERR_CAST(iter);
goto out;
}
- xattr = bkey_s_c_to_xattr(k);
+ xattr = bkey_s_c_to_xattr(bch2_btree_iter_peek_slot(iter));
acl = bch2_acl_from_disk(xattr_val(xattr.v),
le16_to_cpu(xattr.v->x_val_len));
@@ -235,49 +245,59 @@ struct posix_acl *bch2_get_acl(struct inode *vinode, int type)
if (!IS_ERR(acl))
set_cached_acl(&inode->v, type, acl);
out:
- bch2_btree_iter_unlock(&iter);
+ bch2_trans_exit(&trans);
return acl;
}
-int __bch2_set_acl(struct inode *vinode, struct posix_acl *acl, int type)
+int bch2_set_acl_trans(struct btree_trans *trans,
+ struct bch_inode_unpacked *inode_u,
+ const struct bch_hash_info *hash_info,
+ struct posix_acl *acl, int type)
{
- struct bch_inode_info *inode = to_bch_ei(vinode);
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
int ret;
if (type == ACL_TYPE_DEFAULT &&
- !S_ISDIR(inode->v.i_mode))
+ !S_ISDIR(inode_u->bi_mode))
return acl ? -EACCES : 0;
if (acl) {
struct bkey_i_xattr *xattr =
- bch2_acl_to_xattr(acl, type);
+ bch2_acl_to_xattr(trans, acl, type);
if (IS_ERR(xattr))
return PTR_ERR(xattr);
- ret = bch2_hash_set(bch2_xattr_hash_desc, &inode->ei_str_hash,
- c, inode->v.i_ino, &inode->ei_journal_seq,
- &xattr->k_i, 0);
- kfree(xattr);
+ ret = __bch2_hash_set(trans, bch2_xattr_hash_desc, hash_info,
+ inode_u->bi_inum, &xattr->k_i, 0);
} else {
struct xattr_search_key search =
X_SEARCH(acl_to_xattr_type(type), "", 0);
- ret = bch2_hash_delete(bch2_xattr_hash_desc, &inode->ei_str_hash,
- c, inode->v.i_ino, &inode->ei_journal_seq,
- &search);
+ ret = bch2_hash_delete(trans, bch2_xattr_hash_desc, hash_info,
+ inode_u->bi_inum, &search);
}
- if (!ret)
- set_cached_acl(&inode->v, type, acl);
+ return ret == -ENOENT ? 0 : ret;
+}
- return ret;
+static int inode_update_for_set_acl_fn(struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ void *p)
+{
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ struct timespec now = current_time(&inode->v);
+ umode_t mode = (unsigned long) p;
+
+ bi->bi_ctime = timespec_to_bch2_time(c, now);
+ bi->bi_mode = mode;
+ return 0;
}
int bch2_set_acl(struct inode *vinode, struct posix_acl *acl, int type)
{
struct bch_inode_info *inode = to_bch_ei(vinode);
struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ struct btree_trans trans;
+ struct bch_inode_unpacked inode_u;
umode_t mode = inode->v.i_mode;
int ret;
@@ -287,19 +307,76 @@ int bch2_set_acl(struct inode *vinode, struct posix_acl *acl, int type)
return ret;
}
- ret = __bch2_set_acl(vinode, acl, type);
- if (ret)
- return ret;
+ bch2_trans_init(&trans, c);
+retry:
+ bch2_trans_begin(&trans);
+
+ ret = bch2_set_acl_trans(&trans,
+ &inode->ei_inode,
+ &inode->ei_str_hash,
+ acl, type) ?:
+ bch2_write_inode_trans(&trans, inode, &inode_u,
+ inode_update_for_set_acl_fn,
+ (void *)(unsigned long) mode) ?:
+ bch2_trans_commit(&trans, NULL, NULL,
+ &inode->ei_journal_seq,
+ BTREE_INSERT_ATOMIC|
+ BTREE_INSERT_NOUNLOCK);
+ if (ret == -EINTR)
+ goto retry;
+ if (unlikely(ret))
+ goto err;
+
+ bch2_inode_update_after_write(c, inode, &inode_u,
+ ATTR_CTIME|ATTR_MODE);
+
+ set_cached_acl(&inode->v, type, acl);
+err:
+ bch2_trans_exit(&trans);
+
+ return ret;
+}
+
+int bch2_acl_chmod(struct btree_trans *trans,
+ struct bch_inode_info *inode,
+ umode_t mode,
+ struct posix_acl **new_acl)
+{
+ struct btree_iter *iter;
+ struct bkey_s_c_xattr xattr;
+ struct bkey_i_xattr *new;
+ struct posix_acl *acl;
+ int ret = 0;
- if (mode != inode->v.i_mode) {
- mutex_lock(&inode->ei_update_lock);
- inode->v.i_mode = mode;
- inode->v.i_ctime = current_time(&inode->v);
+ iter = bch2_hash_lookup(trans, bch2_xattr_hash_desc,
+ &inode->ei_str_hash, inode->v.i_ino,
+ &X_SEARCH(BCH_XATTR_INDEX_POSIX_ACL_ACCESS, "", 0),
+ BTREE_ITER_INTENT);
+ if (IS_ERR(iter))
+ return PTR_ERR(iter) != -ENOENT ? PTR_ERR(iter) : 0;
+
+ xattr = bkey_s_c_to_xattr(bch2_btree_iter_peek_slot(iter));
+
+ acl = bch2_acl_from_disk(xattr_val(xattr.v),
+ le16_to_cpu(xattr.v->x_val_len));
+ if (IS_ERR_OR_NULL(acl))
+ return PTR_ERR(acl);
+
+ ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
+ if (ret)
+ goto err;
- ret = bch2_write_inode(c, inode);
- mutex_unlock(&inode->ei_update_lock);
+ new = bch2_acl_to_xattr(trans, acl, ACL_TYPE_ACCESS);
+ if (IS_ERR(new)) {
+ ret = PTR_ERR(new);
+ goto err;
}
+ bch2_trans_update(trans, iter, &new->k_i, 0);
+ *new_acl = acl;
+ acl = NULL;
+err:
+ kfree(acl);
return ret;
}
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-01 05:10:18 +0000