diff options
Diffstat (limited to 'fs/bcachefs/fs.c')
| -rw-r--r-- | fs/bcachefs/fs.c | 71 |
1 files changed, 52 insertions, 19 deletions
diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c index 166d8d8abe68..49da8db1d9e9 100644 --- a/fs/bcachefs/fs.c +++ b/fs/bcachefs/fs.c @@ -258,7 +258,8 @@ __bch2_create(struct mnt_idmap *idmap, retry: bch2_trans_begin(trans); - ret = bch2_create_trans(trans, + ret = bch2_subvol_is_ro_trans(trans, dir->ei_subvol) ?: + bch2_create_trans(trans, inode_inum(dir), &dir_u, &inode_u, !(flags & BCH_CREATE_TMPFILE) ? &dentry->d_name : NULL, @@ -430,7 +431,9 @@ static int bch2_link(struct dentry *old_dentry, struct inode *vdir, lockdep_assert_held(&inode->v.i_rwsem); - ret = __bch2_link(c, inode, dir, dentry); + ret = bch2_subvol_is_ro(c, dir->ei_subvol) ?: + bch2_subvol_is_ro(c, inode->ei_subvol) ?: + __bch2_link(c, inode, dir, dentry); if (unlikely(ret)) return ret; @@ -481,7 +484,11 @@ err: static int bch2_unlink(struct inode *vdir, struct dentry *dentry) { - return __bch2_unlink(vdir, dentry, false); + struct bch_inode_info *dir= to_bch_ei(vdir); + struct bch_fs *c = dir->v.i_sb->s_fs_info; + + return bch2_subvol_is_ro(c, dir->ei_subvol) ?: + __bch2_unlink(vdir, dentry, false); } static int bch2_symlink(struct mnt_idmap *idmap, @@ -562,6 +569,11 @@ static int bch2_rename2(struct mnt_idmap *idmap, src_inode, dst_inode); + ret = bch2_subvol_is_ro_trans(trans, src_dir->ei_subvol) ?: + bch2_subvol_is_ro_trans(trans, dst_dir->ei_subvol); + if (ret) + goto err; + if (inode_attr_changing(dst_dir, src_inode, Inode_opt_project)) { ret = bch2_fs_quota_transfer(c, src_inode, dst_dir->ei_qid, @@ -783,11 +795,13 @@ static int bch2_setattr(struct mnt_idmap *idmap, struct dentry *dentry, struct iattr *iattr) { struct bch_inode_info *inode = to_bch_ei(dentry->d_inode); + struct bch_fs *c = inode->v.i_sb->s_fs_info; int ret; lockdep_assert_held(&inode->v.i_rwsem); - ret = setattr_prepare(idmap, dentry, iattr); + ret = bch2_subvol_is_ro(c, inode->ei_subvol) ?: + setattr_prepare(idmap, dentry, iattr); if (ret) return ret; @@ -1010,12 +1024,26 @@ static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx) return bch2_err_class(ret); } +static int bch2_open(struct inode *vinode, struct file *file) +{ + if (file->f_flags & (O_WRONLY|O_RDWR)) { + struct bch_inode_info *inode = to_bch_ei(vinode); + struct bch_fs *c = inode->v.i_sb->s_fs_info; + + int ret = bch2_subvol_is_ro(c, inode->ei_subvol); + if (ret) + return ret; + } + + return generic_file_open(vinode, file); +} + static const struct file_operations bch_file_operations = { + .open = bch2_open, .llseek = bch2_llseek, .read_iter = bch2_read_iter, .write_iter = bch2_write_iter, .mmap = bch2_mmap, - .open = generic_file_open, .fsync = bch2_fsync, .splice_read = filemap_splice_read, .splice_write = iter_file_splice_write, @@ -1143,24 +1171,33 @@ static int bch2_encode_fh(struct inode *vinode, u32 *fh, int *len, { struct bch_inode_info *inode = to_bch_ei(vinode); struct bch_inode_info *dir = to_bch_ei(vdir); - - if (*len < sizeof(struct bcachefs_fid_with_parent) / sizeof(u32)) - return FILEID_INVALID; + int min_len; if (!S_ISDIR(inode->v.i_mode) && dir) { struct bcachefs_fid_with_parent *fid = (void *) fh; + min_len = sizeof(*fid) / sizeof(u32); + if (*len < min_len) { + *len = min_len; + return FILEID_INVALID; + } + fid->fid = bch2_inode_to_fid(inode); fid->dir = bch2_inode_to_fid(dir); - *len = sizeof(*fid) / sizeof(u32); + *len = min_len; return FILEID_BCACHEFS_WITH_PARENT; } else { struct bcachefs_fid *fid = (void *) fh; + min_len = sizeof(*fid) / sizeof(u32); + if (*len < min_len) { + *len = min_len; + return FILEID_INVALID; + } *fid = bch2_inode_to_fid(inode); - *len = sizeof(*fid) / sizeof(u32); + *len = min_len; return FILEID_BCACHEFS_WITHOUT_PARENT; } } @@ -1667,8 +1704,7 @@ static int bch2_show_devname(struct seq_file *seq, struct dentry *root) if (!first) seq_putc(seq, ':'); first = false; - seq_puts(seq, "/dev/"); - seq_puts(seq, ca->name); + seq_puts(seq, ca->disk_sb.sb_name); } return 0; @@ -1734,6 +1770,9 @@ static int bch2_unfreeze(struct super_block *sb) struct bch_fs *c = sb->s_fs_info; int ret; + if (test_bit(BCH_FS_EMERGENCY_RO, &c->flags)) + return 0; + down_write(&c->state_lock); ret = bch2_fs_read_write(c); up_write(&c->state_lock); @@ -1922,10 +1961,7 @@ out: return dget(sb->s_root); err_put_super: - sb->s_fs_info = NULL; - c->vfs_sb = NULL; deactivate_locked_super(sb); - bch2_fs_stop(c); return ERR_PTR(bch2_err_class(ret)); } @@ -1933,11 +1969,8 @@ static void bch2_kill_sb(struct super_block *sb) { struct bch_fs *c = sb->s_fs_info; - if (c) - c->vfs_sb = NULL; generic_shutdown_super(sb); - if (c) - bch2_fs_free(c); + bch2_fs_free(c); } static struct file_system_type bcache_fs_type = { |