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Update bcachefs sources to f5a0255e6524 bcachefs: v2 versions of subvolume ioctls

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This commit is contained in:
Kent Overstreet 2025-08-27 19:28:42 -04:00
parent 77ca58e3a7
commit a59519d72a
5 changed files with 109 additions and 15 deletions
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2
.bcachefs_revision
View File

@ -1 +1 @@
753b29cc79897dd7f776fa09654196f5b25f8b96
f5a0255e65246610d9c71fa1ec5bee277870330e

12
libbcachefs/bcachefs_ioctl.h
View File

@ -87,7 +87,9 @@ struct bch_ioctl_incremental {
#define BCH_IOCTL_DISK_RESIZE_JOURNAL_v2 _IOW(0xbc, 28, struct bch_ioctl_disk_resize_journal_v2)
#define BCH_IOCTL_SUBVOLUME_CREATE _IOW(0xbc, 16, struct bch_ioctl_subvolume)
#define BCH_IOCTL_SUBVOLUME_CREATE_v2 _IOW(0xbc, 29, struct bch_ioctl_subvolume_v2)
#define BCH_IOCTL_SUBVOLUME_DESTROY _IOW(0xbc, 17, struct bch_ioctl_subvolume)
#define BCH_IOCTL_SUBVOLUME_DESTROY_v2 _IOW(0xbc, 30, struct bch_ioctl_subvolume_v2)
#define BCH_IOCTL_DEV_USAGE_V2 _IOWR(0xbc, 18, struct bch_ioctl_dev_usage_v2)
@ -451,6 +453,16 @@ struct bch_ioctl_subvolume {
__u64 src_ptr;
};
struct bch_ioctl_subvolume_v2 {
__u32 flags;
__u32 dirfd;
__u16 mode;
__u16 pad[3];
__u64 dst_ptr;
__u64 src_ptr;
struct bch_ioctl_err_msg err;
};
#define BCH_SUBVOL_SNAPSHOT_CREATE (1U << 0)
#define BCH_SUBVOL_SNAPSHOT_RO (1U << 1)

16
libbcachefs/chardev.c
View File

@ -187,7 +187,7 @@ static long bch2_ioctl_stop(struct bch_fs *c)
}
#endif
static int copy_ioctl_err_msg(struct bch_ioctl_err_msg *dst, struct printbuf *src, int ret)
int bch2_copy_ioctl_err_msg(struct bch_ioctl_err_msg *dst, struct printbuf *src, int ret)
{
if (ret) {
prt_printf(src, "error=%s", bch2_err_str(ret));
@ -243,7 +243,7 @@ static long bch2_ioctl_disk_add_v2(struct bch_fs *c, struct bch_ioctl_disk_v2 ar
CLASS(printbuf, err)();
ret = bch2_dev_add(c, path, &err);
kfree(path);
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
static long bch2_ioctl_disk_remove(struct bch_fs *c, struct bch_ioctl_disk arg)
@ -287,7 +287,7 @@ static long bch2_ioctl_disk_remove_v2(struct bch_fs *c, struct bch_ioctl_disk_v2
CLASS(printbuf, err)();
int ret = bch2_dev_remove(c, ca, arg.flags, &err);
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
static long bch2_ioctl_disk_online(struct bch_fs *c, struct bch_ioctl_disk arg)
@ -333,7 +333,7 @@ static long bch2_ioctl_disk_online_v2(struct bch_fs *c, struct bch_ioctl_disk_v2
CLASS(printbuf, err)();
ret = bch2_dev_online(c, path, &err);
kfree(path);
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
static long bch2_ioctl_disk_offline(struct bch_fs *c, struct bch_ioctl_disk arg)
@ -377,7 +377,7 @@ static long bch2_ioctl_disk_offline_v2(struct bch_fs *c, struct bch_ioctl_disk_v
CLASS(printbuf, err)();
int ret = bch2_dev_offline(c, ca, arg.flags, &err);
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
static long bch2_ioctl_disk_set_state(struct bch_fs *c,
@ -429,7 +429,7 @@ static long bch2_ioctl_disk_set_state_v2(struct bch_fs *c,
ret = bch2_dev_set_state(c, ca, arg.new_state, arg.flags, &err);
err:
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
struct bch_data_ctx {
@ -783,7 +783,7 @@ static long bch2_ioctl_disk_resize_v2(struct bch_fs *c,
CLASS(printbuf, err)();
int ret = bch2_dev_resize(c, ca, arg.nbuckets, &err);
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
static long bch2_ioctl_disk_resize_journal(struct bch_fs *c,
@ -825,7 +825,7 @@ static long bch2_ioctl_disk_resize_journal_v2(struct bch_fs *c,
CLASS(printbuf, err)();
int ret = bch2_set_nr_journal_buckets(c, ca, arg.nbuckets);
return copy_ioctl_err_msg(&arg.err, &err, ret);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
#define BCH_IOCTL(_name, _argtype) \

3
libbcachefs/chardev.h
View File

@ -4,6 +4,9 @@
#ifndef NO_BCACHEFS_FS
struct printbuf;
int bch2_copy_ioctl_err_msg(struct bch_ioctl_err_msg *, struct printbuf *, int);
long bch2_fs_ioctl(struct bch_fs *, unsigned, void __user *);
void bch2_fs_chardev_exit(struct bch_fs *);

89
libbcachefs/fs-ioctl.c
View File

@ -199,8 +199,9 @@ 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)
static long __bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume_v2 arg,
struct printbuf *err)
{
struct inode *dir;
struct bch_inode_info *inode;
@ -214,13 +215,17 @@ static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
unsigned create_flags = BCH_CREATE_SUBVOL;
if (arg.flags & ~(BCH_SUBVOL_SNAPSHOT_CREATE|
BCH_SUBVOL_SNAPSHOT_RO))
BCH_SUBVOL_SNAPSHOT_RO)) {
prt_str(err, "invalid flasg");
return -EINVAL;
}
if (!(arg.flags & BCH_SUBVOL_SNAPSHOT_CREATE) &&
(arg.src_ptr ||
(arg.flags & BCH_SUBVOL_SNAPSHOT_RO)))
(arg.flags & BCH_SUBVOL_SNAPSHOT_RO))) {
prt_str(err, "invalid flasg");
return -EINVAL;
}
if (arg.flags & BCH_SUBVOL_SNAPSHOT_CREATE)
create_flags |= BCH_CREATE_SNAPSHOT;
@ -243,6 +248,7 @@ static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
if (src_path.dentry->d_sb->s_fs_info != c) {
path_put(&src_path);
prt_str(err, "src_path not on dst filesystem");
error = -EXDEV;
goto err1;
}
@ -258,6 +264,7 @@ static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
goto err2;
if (dst_dentry->d_sb->s_fs_info != c) {
prt_str(err, "dst_path not on dst filesystem");
error = -EXDEV;
goto err3;
}
@ -276,6 +283,7 @@ static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
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())) {
prt_str(err, "current uid/gid not mapped into fs namespace");
error = -EOVERFLOW;
goto err3;
}
@ -315,8 +323,35 @@ err1:
return error;
}
static long bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
static long bch2_ioctl_subvolume_create(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume arg)
{
struct bch_ioctl_subvolume_v2 arg_v2 = {
.flags = arg.flags,
.dirfd = arg.dirfd,
.mode = arg.mode,
.dst_ptr = arg.dst_ptr,
.src_ptr = arg.src_ptr,
};
CLASS(printbuf, err)();
long ret = __bch2_ioctl_subvolume_create(c, filp, arg_v2, &err);
if (ret)
bch_err_msg(c, ret, "%s", err.buf);
return ret;
}
static long bch2_ioctl_subvolume_create_v2(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume_v2 arg)
{
CLASS(printbuf, err)();
long ret = __bch2_ioctl_subvolume_create(c, filp, arg, &err);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
static long __bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume_v2 arg,
struct printbuf *err)
{
const char __user *name = (void __user *)(unsigned long)arg.dst_ptr;
struct path path;
@ -350,6 +385,32 @@ err:
return ret;
}
static long bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume arg)
{
struct bch_ioctl_subvolume_v2 arg_v2 = {
.flags = arg.flags,
.dirfd = arg.dirfd,
.mode = arg.mode,
.dst_ptr = arg.dst_ptr,
.src_ptr = arg.src_ptr,
};
CLASS(printbuf, err)();
long ret = __bch2_ioctl_subvolume_destroy(c, filp, arg_v2, &err);
if (ret)
bch_err_msg(c, ret, "%s", err.buf);
return ret;
}
static long bch2_ioctl_subvolume_destroy_v2(struct bch_fs *c, struct file *filp,
struct bch_ioctl_subvolume_v2 arg)
{
CLASS(printbuf, err)();
long ret = __bch2_ioctl_subvolume_destroy(c, filp, arg, &err);
return bch2_copy_ioctl_err_msg(&arg.err, &err, ret);
}
long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
struct bch_inode_info *inode = file_bch_inode(file);
@ -391,6 +452,15 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
break;
}
case BCH_IOCTL_SUBVOLUME_CREATE_v2: {
struct bch_ioctl_subvolume_v2 i;
ret = copy_from_user(&i, (void __user *) arg, sizeof(i))
? -EFAULT
: bch2_ioctl_subvolume_create_v2(c, file, i);
break;
}
case BCH_IOCTL_SUBVOLUME_DESTROY: {
struct bch_ioctl_subvolume i;
@ -400,6 +470,15 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
break;
}
case BCH_IOCTL_SUBVOLUME_DESTROY_v2: {
struct bch_ioctl_subvolume_v2 i;
ret = copy_from_user(&i, (void __user *) arg, sizeof(i))
? -EFAULT
: bch2_ioctl_subvolume_destroy_v2(c, file, i);
break;
}
default:
ret = bch2_fs_ioctl(c, cmd, (void __user *) arg);
break;