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bcachefs: Snapshot creation, deletion

Browse Source 
This is the final patch in the patch series implementing snapshots.
This patch implements two new ioctls that work like creation and
deletion of directories, but fancier.

 - BCH_IOCTL_SUBVOLUME_CREATE, for creating new subvolumes and snaphots
 - BCH_IOCTL_SUBVOLUME_DESTROY, for deleting subvolumes and snapshots

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-03-16 23:28:43 -04:00 committed by Kent Overstreet
parent a861c7225b
commit 42d237320e
10 changed files with 354 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/bcachefs/dirent.c
View File

@ -383,14 +383,6 @@ int bch2_dirent_rename(struct btree_trans *trans,
return ret;
}
int bch2_dirent_delete_at(struct btree_trans *trans,
const struct bch_hash_info *hash_info,
struct btree_iter *iter)
{
return bch2_hash_delete_at(trans, bch2_dirent_hash_desc,
hash_info, iter);
}
int __bch2_dirent_lookup_trans(struct btree_trans *trans,
struct btree_iter *iter,
subvol_inum dir,

4
fs/bcachefs/dirent.h
View File

@ -33,10 +33,6 @@ int bch2_dirent_create(struct btree_trans *, subvol_inum,
const struct bch_hash_info *, u8,
const struct qstr *, u64, u64 *, int);
int bch2_dirent_delete_at(struct btree_trans *,
const struct bch_hash_info *,
struct btree_iter *);
int __bch2_dirent_read_target(struct btree_trans *, struct bkey_s_c_dirent,
u32 *, u32 *, u64 *, bool);

194
fs/bcachefs/fs-common.c
View File

@ -11,6 +11,11 @@
#include <linux/posix_acl.h>
static inline int is_subdir_for_nlink(struct bch_inode_unpacked *inode)
{
return S_ISDIR(inode->bi_mode) && !inode->bi_subvol;
}
int bch2_create_trans(struct btree_trans *trans,
subvol_inum dir,
struct bch_inode_unpacked *dir_u,
@ -19,6 +24,7 @@ int bch2_create_trans(struct btree_trans *trans,
uid_t uid, gid_t gid, umode_t mode, dev_t rdev,
struct posix_acl *default_acl,
struct posix_acl *acl,
subvol_inum snapshot_src,
unsigned flags)
{
struct bch_fs *c = trans->c;
@ -27,10 +33,9 @@ int bch2_create_trans(struct btree_trans *trans,
subvol_inum new_inum = dir;
u64 now = bch2_current_time(c);
u64 cpu = raw_smp_processor_id();
u64 dir_offset = 0;
u64 dir_target;
u32 snapshot;
unsigned dir_type;
unsigned dir_type = mode_to_type(mode);
int ret;
ret = bch2_subvolume_get_snapshot(trans, dir.subvol, &snapshot);
@ -41,37 +46,122 @@ int bch2_create_trans(struct btree_trans *trans,
if (ret)
goto err;
bch2_inode_init_late(new_inode, now, uid, gid, mode, rdev, dir_u);
if (!(flags & BCH_CREATE_SNAPSHOT)) {
/* Normal create path - allocate a new inode: */
bch2_inode_init_late(new_inode, now, uid, gid, mode, rdev, dir_u);
if (!name)
new_inode->bi_flags |= BCH_INODE_UNLINKED;
if (flags & BCH_CREATE_TMPFILE)
new_inode->bi_flags |= BCH_INODE_UNLINKED;
ret = bch2_inode_create(trans, &inode_iter, new_inode, snapshot, cpu);
if (ret)
goto err;
ret = bch2_inode_create(trans, &inode_iter, new_inode, snapshot, cpu);
if (ret)
goto err;
snapshot_src = (subvol_inum) { 0 };
} else {
/*
* Creating a snapshot - we're not allocating a new inode, but
* we do have to lookup the root inode of the subvolume we're
* snapshotting and update it (in the new snapshot):
*/
if (!snapshot_src.inum) {
/* Inode wasn't specified, just snapshot: */
struct btree_iter subvol_iter;
struct bkey_s_c k;
bch2_trans_iter_init(trans, &subvol_iter, BTREE_ID_subvolumes,
POS(0, snapshot_src.subvol), 0);
k = bch2_btree_iter_peek_slot(&subvol_iter);
ret = bkey_err(k);
if (!ret && k.k->type != KEY_TYPE_subvolume) {
bch_err(c, "subvolume %u not found",
snapshot_src.subvol);
ret = -ENOENT;
}
if (!ret)
snapshot_src.inum = le64_to_cpu(bkey_s_c_to_subvolume(k).v->inode);
bch2_trans_iter_exit(trans, &subvol_iter);
if (ret)
goto err;
}
ret = bch2_inode_peek(trans, &inode_iter, new_inode, snapshot_src,
BTREE_ITER_INTENT);
if (ret)
goto err;
if (new_inode->bi_subvol != snapshot_src.subvol) {
/* Not a subvolume root: */
ret = -EINVAL;
goto err;
}
/*
* If we're not root, we have to own the subvolume being
* snapshotted:
*/
if (uid && new_inode->bi_uid != uid) {
ret = -EPERM;
goto err;
}
flags |= BCH_CREATE_SUBVOL;
}
new_inum.inum = new_inode->bi_inum;
dir_target = new_inode->bi_inum;
dir_type = mode_to_type(new_inode->bi_mode);
if (default_acl) {
ret = bch2_set_acl_trans(trans, new_inum, new_inode,
default_acl, ACL_TYPE_DEFAULT);
if (flags & BCH_CREATE_SUBVOL) {
u32 new_subvol, dir_snapshot;
ret = bch2_subvolume_create(trans, new_inode->bi_inum,
snapshot_src.subvol,
&new_subvol, &snapshot,
(flags & BCH_CREATE_SNAPSHOT_RO) != 0);
if (ret)
goto err;
new_inode->bi_parent_subvol = dir.subvol;
new_inode->bi_subvol = new_subvol;
new_inum.subvol = new_subvol;
dir_target = new_subvol;
dir_type = DT_SUBVOL;
ret = bch2_subvolume_get_snapshot(trans, dir.subvol, &dir_snapshot);
if (ret)
goto err;
bch2_btree_iter_set_snapshot(&dir_iter, dir_snapshot);
ret = bch2_btree_iter_traverse(&dir_iter);
if (ret)
goto err;
}
if (acl) {
ret = bch2_set_acl_trans(trans, new_inum, new_inode,
acl, ACL_TYPE_ACCESS);
if (ret)
goto err;
if (!(flags & BCH_CREATE_SNAPSHOT)) {
if (default_acl) {
ret = bch2_set_acl_trans(trans, new_inum, new_inode,
default_acl, ACL_TYPE_DEFAULT);
if (ret)
goto err;
}
if (acl) {
ret = bch2_set_acl_trans(trans, new_inum, new_inode,
acl, ACL_TYPE_ACCESS);
if (ret)
goto err;
}
}
if (name) {
if (!(flags & BCH_CREATE_TMPFILE)) {
struct bch_hash_info dir_hash = bch2_hash_info_init(c, dir_u);
u64 dir_offset;
if (S_ISDIR(new_inode->bi_mode))
if (is_subdir_for_nlink(new_inode))
dir_u->bi_nlink++;
dir_u->bi_mtime = dir_u->bi_ctime = now;
@ -87,11 +177,11 @@ int bch2_create_trans(struct btree_trans *trans,
BCH_HASH_SET_MUST_CREATE);
if (ret)
goto err;
}
if (c->sb.version >= bcachefs_metadata_version_inode_backpointers) {
new_inode->bi_dir = dir_u->bi_inum;
new_inode->bi_dir_offset = dir_offset;
if (c->sb.version >= bcachefs_metadata_version_inode_backpointers) {
new_inode->bi_dir = dir_u->bi_inum;
new_inode->bi_dir_offset = dir_offset;
}
}
inode_iter.flags &= ~BTREE_ITER_ALL_SNAPSHOTS;
@ -160,7 +250,8 @@ int bch2_unlink_trans(struct btree_trans *trans,
subvol_inum dir,
struct bch_inode_unpacked *dir_u,
struct bch_inode_unpacked *inode_u,
const struct qstr *name)
const struct qstr *name,
int deleting_snapshot)
{
struct bch_fs *c = trans->c;
struct btree_iter dir_iter = { NULL };
@ -169,6 +260,7 @@ int bch2_unlink_trans(struct btree_trans *trans,
struct bch_hash_info dir_hash;
subvol_inum inum;
u64 now = bch2_current_time(c);
struct bkey_s_c k;
int ret;
ret = bch2_inode_peek(trans, &dir_iter, dir_u, dir, BTREE_ITER_INTENT);
@ -187,29 +279,51 @@ int bch2_unlink_trans(struct btree_trans *trans,
if (ret)
goto err;
if (deleting_snapshot == 1 && !inode_u->bi_subvol) {
ret = -ENOENT;
goto err;
}
if (deleting_snapshot <= 0 && S_ISDIR(inode_u->bi_mode)) {
ret = bch2_empty_dir_trans(trans, inum);
if (ret)
goto err;
}
if (inode_u->bi_subvol) {
ret = bch2_subvolume_delete(trans, inode_u->bi_subvol,
deleting_snapshot);
if (ret)
goto err;
k = bch2_btree_iter_peek_slot(&dirent_iter);
ret = bkey_err(k);
if (ret)
goto err;
/*
* If we're deleting a subvolume, we need to really delete the
* dirent, not just emit a whiteout in the current snapshot:
*/
bch2_btree_iter_set_snapshot(&dirent_iter, k.k->p.snapshot);
ret = bch2_btree_iter_traverse(&dirent_iter);
if (ret)
goto err;
}
if (inode_u->bi_dir == dirent_iter.pos.inode &&
inode_u->bi_dir_offset == dirent_iter.pos.offset) {
inode_u->bi_dir = 0;
inode_u->bi_dir_offset = 0;
}
if (S_ISDIR(inode_u->bi_mode)) {
ret = bch2_empty_dir_trans(trans, inum);
if (ret)
goto err;
}
if (dir.subvol != inum.subvol) {
ret = bch2_subvolume_delete(trans, inum.subvol, false);
if (ret)
goto err;
}
dir_u->bi_mtime = dir_u->bi_ctime = inode_u->bi_ctime = now;
dir_u->bi_nlink -= S_ISDIR(inode_u->bi_mode);
dir_u->bi_nlink -= is_subdir_for_nlink(inode_u);
bch2_inode_nlink_dec(inode_u);
ret = bch2_dirent_delete_at(trans, &dir_hash, &dirent_iter) ?:
ret = bch2_hash_delete_at(trans, bch2_dirent_hash_desc,
&dir_hash, &dirent_iter,
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?:
bch2_inode_write(trans, &dir_iter, dir_u) ?:
bch2_inode_write(trans, &inode_iter, inode_u);
err:
@ -348,12 +462,12 @@ int bch2_rename_trans(struct btree_trans *trans,
goto err;
}
if (S_ISDIR(src_inode_u->bi_mode)) {
if (is_subdir_for_nlink(src_inode_u)) {
src_dir_u->bi_nlink--;
dst_dir_u->bi_nlink++;
}
if (dst_inum.inum && S_ISDIR(dst_inode_u->bi_mode)) {
if (dst_inum.inum && is_subdir_for_nlink(dst_inode_u)) {
dst_dir_u->bi_nlink--;
src_dir_u->bi_nlink += mode == BCH_RENAME_EXCHANGE;
}

7
fs/bcachefs/fs-common.h
View File

@ -5,6 +5,9 @@
struct posix_acl;
#define BCH_CREATE_TMPFILE (1U << 0)
#define BCH_CREATE_SUBVOL (1U << 1)
#define BCH_CREATE_SNAPSHOT (1U << 2)
#define BCH_CREATE_SNAPSHOT_RO (1U << 3)
int bch2_create_trans(struct btree_trans *, subvol_inum,
struct bch_inode_unpacked *,
@ -13,7 +16,7 @@ int bch2_create_trans(struct btree_trans *, subvol_inum,
uid_t, gid_t, umode_t, dev_t,
struct posix_acl *,
struct posix_acl *,
unsigned);
subvol_inum, unsigned);
int bch2_link_trans(struct btree_trans *,
subvol_inum, struct bch_inode_unpacked *,
@ -23,7 +26,7 @@ int bch2_link_trans(struct btree_trans *,
int bch2_unlink_trans(struct btree_trans *, subvol_inum,
struct bch_inode_unpacked *,
struct bch_inode_unpacked *,
const struct qstr *);
const struct qstr *, int);
int bch2_rename_trans(struct btree_trans *,
subvol_inum, struct bch_inode_unpacked *,

168
fs/bcachefs/fs-ioctl.c
View File

@ -10,7 +10,11 @@
#include "quota.h"
#include <linux/compat.h>
#include <linux/fsnotify.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/security.h>
#include <linux/writeback.h>
#define FS_IOC_GOINGDOWN _IOR('X', 125, __u32)
#define FSOP_GOING_FLAGS_DEFAULT 0x0 /* going down */
@ -292,6 +296,154 @@ static int bch2_ioc_goingdown(struct bch_fs *c, u32 __user *arg)
return ret;
}
static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume arg)
{
struct inode *dir;
struct bch_inode_info *inode;
struct user_namespace *s_user_ns;
struct dentry *dst_dentry;
struct path src_path, dst_path;
int how = LOOKUP_FOLLOW;
int error;
subvol_inum snapshot_src = { 0 };
unsigned lookup_flags = 0;
unsigned create_flags = BCH_CREATE_SUBVOL;
if (arg.flags & ~(BCH_SUBVOL_SNAPSHOT_CREATE|
BCH_SUBVOL_SNAPSHOT_RO))
return -EINVAL;
if (!(arg.flags & BCH_SUBVOL_SNAPSHOT_CREATE) &&
(arg.src_ptr ||
(arg.flags & BCH_SUBVOL_SNAPSHOT_RO)))
return -EINVAL;
if (arg.flags & BCH_SUBVOL_SNAPSHOT_CREATE)
create_flags |= BCH_CREATE_SNAPSHOT;
if (arg.flags & BCH_SUBVOL_SNAPSHOT_RO)
create_flags |= BCH_CREATE_SNAPSHOT_RO;
/* why do we need this lock? */
down_read(&c->vfs_sb->s_umount);
if (arg.flags & BCH_SUBVOL_SNAPSHOT_CREATE)
sync_inodes_sb(c->vfs_sb);
retry:
if (arg.src_ptr) {
error = user_path_at(arg.dirfd,
(const char __user *)(unsigned long)arg.src_ptr,
how, &src_path);
if (error)
goto err1;
if (src_path.dentry->d_sb->s_fs_info != c) {
path_put(&src_path);
error = -EXDEV;
goto err1;
}
snapshot_src = inode_inum(to_bch_ei(src_path.dentry->d_inode));
}
dst_dentry = user_path_create(arg.dirfd,
(const char __user *)(unsigned long)arg.dst_ptr,
&dst_path, lookup_flags);
error = PTR_ERR_OR_ZERO(dst_dentry);
if (error)
goto err2;
if (dst_dentry->d_sb->s_fs_info != c) {
error = -EXDEV;
goto err3;
}
if (dst_dentry->d_inode) {
error = -EEXIST;
goto err3;
}
dir = dst_path.dentry->d_inode;
if (IS_DEADDIR(dir)) {
error = -ENOENT;
goto err3;
}
s_user_ns = dir->i_sb->s_user_ns;
if (!kuid_has_mapping(s_user_ns, current_fsuid()) ||
!kgid_has_mapping(s_user_ns, current_fsgid())) {
error = -EOVERFLOW;
goto err3;
}
error = inode_permission(file_mnt_idmap(filp),
dir, MAY_WRITE | MAY_EXEC);
if (error)
goto err3;
if (!IS_POSIXACL(dir))
arg.mode &= ~current_umask();
error = security_path_mkdir(&dst_path, dst_dentry, arg.mode);
if (error)
goto err3;
if ((arg.flags & BCH_SUBVOL_SNAPSHOT_CREATE) &&
!arg.src_ptr)
snapshot_src.subvol = to_bch_ei(dir)->ei_inode.bi_subvol;
inode = __bch2_create(file_mnt_idmap(filp), to_bch_ei(dir),
dst_dentry, arg.mode|S_IFDIR,
0, snapshot_src, create_flags);
error = PTR_ERR_OR_ZERO(inode);
if (error)
goto err3;
d_instantiate(dst_dentry, &inode->v);
fsnotify_mkdir(dir, dst_dentry);
err3:
done_path_create(&dst_path, dst_dentry);
err2:
if (arg.src_ptr)
path_put(&src_path);
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
err1:
up_read(&c->vfs_sb->s_umount);
return error;
}
static long bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume arg)
{
struct path path;
int ret = 0;
if (arg.flags)
return -EINVAL;
ret = user_path_at(arg.dirfd,
(const char __user *)(unsigned long)arg.dst_ptr,
LOOKUP_FOLLOW, &path);
if (ret)
return ret;
if (path.dentry->d_sb->s_fs_info != c) {
path_put(&path);
return -EXDEV;
}
ret = __bch2_unlink(path.dentry->d_parent->d_inode, path.dentry, 1);
path_put(&path);
return ret;
}
long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
struct bch_inode_info *inode = file_bch_inode(file);
@ -322,6 +474,22 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
case FS_IOC_GOINGDOWN:
return bch2_ioc_goingdown(c, (u32 __user *) arg);
case BCH_IOCTL_SUBVOLUME_CREATE: {
struct bch_ioctl_subvolume i;
if (copy_from_user(&i, (void __user *) arg, sizeof(i)))
return -EFAULT;
return bch2_ioctl_subvolume_create(c, file, i);
}
case BCH_IOCTL_SUBVOLUME_DESTROY: {
struct bch_ioctl_subvolume i;
if (copy_from_user(&i, (void __user *) arg, sizeof(i)))
return -EFAULT;
return bch2_ioctl_subvolume_destroy(c, file, i);
}
default:
return bch2_fs_ioctl(c, cmd, (void __user *) arg);
}

29
fs/bcachefs/fs.c
View File

@ -240,12 +240,6 @@ struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
struct bch_inode_info *inode;
int ret;
/*
* debug assert, to be removed when we start creating
* subvolumes/snapshots:
*/
BUG_ON(inum.subvol != BCACHEFS_ROOT_SUBVOL);
inode = to_bch_ei(iget5_locked(c->vfs_sb,
bch2_inode_hash(inum),
bch2_iget5_test,
@ -274,7 +268,8 @@ struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
struct bch_inode_info *
__bch2_create(struct mnt_idmap *idmap,
struct bch_inode_info *dir, struct dentry *dentry,
umode_t mode, dev_t rdev, unsigned flags)
umode_t mode, dev_t rdev, subvol_inum snapshot_src,
unsigned flags)
{
struct bch_fs *c = dir->v.i_sb->s_fs_info;
struct btree_trans trans;
@ -319,7 +314,7 @@ __bch2_create(struct mnt_idmap *idmap,
from_kuid(i_user_ns(&dir->v), current_fsuid()),
from_kgid(i_user_ns(&dir->v), current_fsgid()),
mode, rdev,
default_acl, acl, flags) ?:
default_acl, acl, snapshot_src, flags) ?:
bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, 1,
KEY_TYPE_QUOTA_PREALLOC);
if (unlikely(ret))
@ -426,7 +421,8 @@ static int bch2_mknod(struct mnt_idmap *idmap,
umode_t mode, dev_t rdev)
{
struct bch_inode_info *inode =
__bch2_create(idmap, to_bch_ei(vdir), dentry, mode, rdev, 0);
__bch2_create(idmap, to_bch_ei(vdir), dentry, mode, rdev,
(subvol_inum) { 0 }, 0);
if (IS_ERR(inode))
return PTR_ERR(inode);
@ -493,7 +489,8 @@ static int bch2_link(struct dentry *old_dentry, struct inode *vdir,
return 0;
}
static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
int __bch2_unlink(struct inode *vdir, struct dentry *dentry,
int deleting_snapshot)
{
struct bch_fs *c = vdir->i_sb->s_fs_info;
struct bch_inode_info *dir = to_bch_ei(vdir);
@ -509,7 +506,8 @@ static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
BTREE_INSERT_NOFAIL,
bch2_unlink_trans(&trans,
inode_inum(dir), &dir_u,
&inode_u, &dentry->d_name));
&inode_u, &dentry->d_name,
deleting_snapshot));
if (likely(!ret)) {
BUG_ON(inode_u.bi_inum != inode->v.i_ino);
@ -527,6 +525,11 @@ static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
return ret;
}
static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
{
return __bch2_unlink(vdir, dentry, -1);
}
static int bch2_symlink(struct mnt_idmap *idmap,
struct inode *vdir, struct dentry *dentry,
const char *symname)
@ -536,7 +539,7 @@ static int bch2_symlink(struct mnt_idmap *idmap,
int ret;
inode = __bch2_create(idmap, dir, dentry, S_IFLNK|S_IRWXUGO, 0,
BCH_CREATE_TMPFILE);
(subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
if (unlikely(IS_ERR(inode)))
return PTR_ERR(inode);
@ -855,7 +858,7 @@ static int bch2_tmpfile(struct mnt_idmap *idmap,
struct bch_inode_info *inode =
__bch2_create(idmap, to_bch_ei(vdir),
file->f_path.dentry, mode, 0,
BCH_CREATE_TMPFILE);
(subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
if (IS_ERR(inode))
return PTR_ERR(inode);

3
fs/bcachefs/fs.h
View File

@ -146,7 +146,7 @@ struct bch_inode_unpacked;
struct bch_inode_info *
__bch2_create(struct mnt_idmap *, struct bch_inode_info *,
struct dentry *, umode_t, dev_t, unsigned);
struct dentry *, umode_t, dev_t, subvol_inum, unsigned);
int bch2_fs_quota_transfer(struct bch_fs *,
struct bch_inode_info *,
@ -183,6 +183,7 @@ int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
int bch2_setattr_nonsize(struct mnt_idmap *,
struct bch_inode_info *,
struct iattr *);
int __bch2_unlink(struct inode *, struct dentry *, int);
void bch2_vfs_exit(void);
int bch2_vfs_init(void);

7
fs/bcachefs/fsck.c
View File

@ -307,7 +307,7 @@ static int __remove_dirent(struct btree_trans *trans, struct bpos pos)
bch2_trans_iter_init(trans, &iter, BTREE_ID_dirents, pos, BTREE_ITER_INTENT);
ret = bch2_hash_delete_at(trans, bch2_dirent_hash_desc,
&dir_hash_info, &iter);
&dir_hash_info, &iter, 0);
bch2_trans_iter_exit(trans, &iter);
return ret;
}
@ -386,7 +386,8 @@ static int lookup_lostfound(struct btree_trans *trans, u32 subvol,
BTREE_INSERT_LAZY_RW,
bch2_create_trans(trans, root_inum, &root,
lostfound, &lostfound_str,
0, 0, S_IFDIR|0700, 0, NULL, NULL, 0));
0, 0, S_IFDIR|0700, 0, NULL, NULL,
(subvol_inum) { }, 0));
if (ret)
bch_err(c, "error creating lost+found: %i", ret);
}
@ -759,7 +760,7 @@ static int fsck_hash_delete_at(struct btree_trans *trans,
{
int ret;
retry:
ret = bch2_hash_delete_at(trans, desc, info, iter) ?:
ret = bch2_hash_delete_at(trans, desc, info, iter, 0) ?:
bch2_trans_commit(trans, NULL, NULL,
BTREE_INSERT_NOFAIL|
BTREE_INSERT_LAZY_RW);

2
fs/bcachefs/recovery.c
View File

@ -1485,7 +1485,7 @@ int bch2_fs_initialize(struct bch_fs *c)
&root_inode, &lostfound_inode,
&lostfound,
0, 0, S_IFDIR|0700, 0,
NULL, NULL, 0));
NULL, NULL, (subvol_inum) { 0 }, 0));
if (ret) {
bch_err(c, "error creating lost+found");
goto err;

7
fs/bcachefs/str_hash.h
View File

@ -307,7 +307,8 @@ static __always_inline
int bch2_hash_delete_at(struct btree_trans *trans,
const struct bch_hash_desc desc,
const struct bch_hash_info *info,
struct btree_iter *iter)
struct btree_iter *iter,
unsigned update_flags)
{
struct bkey_i *delete;
int ret;
@ -325,7 +326,7 @@ int bch2_hash_delete_at(struct btree_trans *trans,
delete->k.p = iter->pos;
delete->k.type = ret ? KEY_TYPE_hash_whiteout : KEY_TYPE_deleted;
return bch2_trans_update(trans, iter, delete, 0);
return bch2_trans_update(trans, iter, delete, update_flags);
}
static __always_inline
@ -342,7 +343,7 @@ int bch2_hash_delete(struct btree_trans *trans,
if (ret)
return ret;
ret = bch2_hash_delete_at(trans, desc, info, &iter);
ret = bch2_hash_delete_at(trans, desc, info, &iter, 0);
bch2_trans_iter_exit(trans, &iter);
return ret;
}