+// SPDX-License-Identifier: GPL-2.0
#ifndef NO_BCACHEFS_FS
#include "bcachefs.h"
#include "chardev.h"
+#include "dirent.h"
#include "fs.h"
+#include "fs-common.h"
#include "fs-ioctl.h"
#include "quota.h"
#include <linux/mount.h>
#define FS_IOC_GOINGDOWN _IOR('X', 125, __u32)
+#define FSOP_GOING_FLAGS_DEFAULT 0x0 /* going down */
+#define FSOP_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
+#define FSOP_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
struct flags_set {
unsigned mask;
return copy_to_user(arg, &fa, sizeof(fa));
}
-static int bch2_set_projid(struct bch_fs *c,
- struct bch_inode_info *inode,
- u32 projid)
-{
- struct bch_qid qid = inode->ei_qid;
- int ret;
-
- if (projid == inode->ei_qid.q[QTYP_PRJ])
- return 0;
-
- qid.q[QTYP_PRJ] = projid;
-
- return bch2_quota_transfer(c, 1 << QTYP_PRJ, qid, inode->ei_qid,
- inode->v.i_blocks +
- inode->ei_quota_reserved);
- if (ret)
- return ret;
-
- inode->ei_qid.q[QTYP_PRJ] = projid;
- return 0;
-}
-
static int fssetxattr_inode_update_fn(struct bch_inode_info *inode,
struct bch_inode_unpacked *bi,
void *p)
{
struct flags_set *s = p;
- bi->bi_project = s->projid;
+ if (s->projid != bi->bi_project) {
+ bi->bi_fields_set |= 1U << Inode_opt_project;
+ bi->bi_project = s->projid;
+ }
return bch2_inode_flags_set(inode, bi, p);
}
if (fa.fsx_xflags)
return -EOPNOTSUPP;
- s.projid = fa.fsx_projid;
+ if (fa.fsx_projid >= U32_MAX)
+ return -EINVAL;
+
+ /*
+ * inode fields accessible via the xattr interface are stored with a +1
+ * bias, so that 0 means unset:
+ */
+ s.projid = fa.fsx_projid + 1;
ret = mnt_want_write_file(file);
if (ret)
return ret;
}
+static int bch2_reinherit_attrs_fn(struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ void *p)
+{
+ struct bch_inode_info *dir = p;
+
+ return !bch2_reinherit_attrs(bi, &dir->ei_inode);
+}
+
+static int bch2_ioc_reinherit_attrs(struct bch_fs *c,
+ struct file *file,
+ struct bch_inode_info *src,
+ const char __user *name)
+{
+ struct bch_hash_info hash = bch2_hash_info_init(c, &src->ei_inode);
+ struct bch_inode_info *dst;
+ struct inode *vinode = NULL;
+ char *kname = NULL;
+ struct qstr qstr;
+ int ret = 0;
+ u64 inum;
+
+ kname = kmalloc(BCH_NAME_MAX + 1, GFP_KERNEL);
+ if (!kname)
+ return -ENOMEM;
+
+ ret = strncpy_from_user(kname, name, BCH_NAME_MAX);
+ if (unlikely(ret < 0))
+ goto err1;
+
+ qstr.len = ret;
+ qstr.name = kname;
+
+ ret = -ENOENT;
+ inum = bch2_dirent_lookup(c, src->v.i_ino, &hash,
+ &qstr);
+ if (!inum)
+ goto err1;
+
+ vinode = bch2_vfs_inode_get(c, inum);
+ ret = PTR_ERR_OR_ZERO(vinode);
+ if (ret)
+ goto err1;
+
+ dst = to_bch_ei(vinode);
+
+ ret = mnt_want_write_file(file);
+ if (ret)
+ goto err2;
+
+ bch2_lock_inodes(INODE_UPDATE_LOCK, src, dst);
+
+ if (inode_attr_changing(src, dst, Inode_opt_project)) {
+ ret = bch2_fs_quota_transfer(c, dst,
+ src->ei_qid,
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_PREALLOC);
+ if (ret)
+ goto err3;
+ }
+
+ ret = bch2_write_inode(c, dst, bch2_reinherit_attrs_fn, src, 0);
+err3:
+ bch2_unlock_inodes(INODE_UPDATE_LOCK, src, dst);
+
+ /* return true if we did work */
+ if (ret >= 0)
+ ret = !ret;
+
+ mnt_drop_write_file(file);
+err2:
+ iput(vinode);
+err1:
+ kfree(kname);
+
+ return ret;
+}
+
+static int bch2_ioc_goingdown(struct bch_fs *c, u32 __user *arg)
+{
+ u32 flags;
+ int ret = 0;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(flags, arg))
+ return -EFAULT;
+
+ bch_notice(c, "shutdown by ioctl type %u", flags);
+
+ down_write(&c->vfs_sb->s_umount);
+
+ switch (flags) {
+ case FSOP_GOING_FLAGS_DEFAULT:
+ ret = freeze_bdev(c->vfs_sb->s_bdev);
+ if (ret)
+ goto err;
+
+ bch2_journal_flush(&c->journal);
+ c->vfs_sb->s_flags |= SB_RDONLY;
+ bch2_fs_emergency_read_only(c);
+ thaw_bdev(c->vfs_sb->s_bdev);
+ break;
+
+ case FSOP_GOING_FLAGS_LOGFLUSH:
+ bch2_journal_flush(&c->journal);
+ fallthrough;
+
+ case FSOP_GOING_FLAGS_NOLOGFLUSH:
+ c->vfs_sb->s_flags |= SB_RDONLY;
+ bch2_fs_emergency_read_only(c);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+err:
+ up_write(&c->vfs_sb->s_umount);
+ return ret;
+}
+
long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
struct bch_inode_info *inode = file_bch_inode(file);
- struct super_block *sb = inode->v.i_sb;
- struct bch_fs *c = sb->s_fs_info;
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
switch (cmd) {
case FS_IOC_GETFLAGS:
case FS_IOC_FSGETXATTR:
return bch2_ioc_fsgetxattr(inode, (void __user *) arg);
case FS_IOC_FSSETXATTR:
- return bch2_ioc_fssetxattr(c, file, inode, (void __user *) arg);
+ return bch2_ioc_fssetxattr(c, file, inode,
+ (void __user *) arg);
+
+ case BCHFS_IOC_REINHERIT_ATTRS:
+ return bch2_ioc_reinherit_attrs(c, file, inode,
+ (void __user *) arg);
case FS_IOC_GETVERSION:
return -ENOTTY;
return -ENOTTY;
case FS_IOC_GOINGDOWN:
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- down_write(&sb->s_umount);
- sb->s_flags |= MS_RDONLY;
- bch2_fs_emergency_read_only(c);
- up_write(&sb->s_umount);
- return 0;
+ return bch2_ioc_goingdown(c, (u32 __user *) arg);
default:
return bch2_fs_ioctl(c, cmd, (void __user *) arg);
projects / bcachefs-tools-debian / blobdiff