diff options
| -rw-r--r-- | fs/btrfs/ioctl.c | 185 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.h | 27 |
2 files changed, 212 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0e92e5763005..55a7283a9e18 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3390,6 +3390,183 @@ out: return ret; } +static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg) +{ + struct btrfs_ioctl_quota_ctl_args *sa; + struct btrfs_trans_handle *trans = NULL; + int ret; + int err; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + + sa = memdup_user(arg, sizeof(*sa)); + if (IS_ERR(sa)) + return PTR_ERR(sa); + + if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) { + trans = btrfs_start_transaction(root, 2); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out; + } + } + + switch (sa->cmd) { + case BTRFS_QUOTA_CTL_ENABLE: + ret = btrfs_quota_enable(trans, root->fs_info); + break; + case BTRFS_QUOTA_CTL_DISABLE: + ret = btrfs_quota_disable(trans, root->fs_info); + break; + case BTRFS_QUOTA_CTL_RESCAN: + ret = btrfs_quota_rescan(root->fs_info); + break; + default: + ret = -EINVAL; + break; + } + + if (copy_to_user(arg, sa, sizeof(*sa))) + ret = -EFAULT; + + if (trans) { + err = btrfs_commit_transaction(trans, root); + if (err && !ret) + ret = err; + } + +out: + kfree(sa); + return ret; +} + +static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg) +{ + struct btrfs_ioctl_qgroup_assign_args *sa; + struct btrfs_trans_handle *trans; + int ret; + int err; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + + sa = memdup_user(arg, sizeof(*sa)); + if (IS_ERR(sa)) + return PTR_ERR(sa); + + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out; + } + + /* FIXME: check if the IDs really exist */ + if (sa->assign) { + ret = btrfs_add_qgroup_relation(trans, root->fs_info, + sa->src, sa->dst); + } else { + ret = btrfs_del_qgroup_relation(trans, root->fs_info, + sa->src, sa->dst); + } + + err = btrfs_end_transaction(trans, root); + if (err && !ret) + ret = err; + +out: + kfree(sa); + return ret; +} + +static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg) +{ + struct btrfs_ioctl_qgroup_create_args *sa; + struct btrfs_trans_handle *trans; + int ret; + int err; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + + sa = memdup_user(arg, sizeof(*sa)); + if (IS_ERR(sa)) + return PTR_ERR(sa); + + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out; + } + + /* FIXME: check if the IDs really exist */ + if (sa->create) { + ret = btrfs_create_qgroup(trans, root->fs_info, sa->qgroupid, + NULL); + } else { + ret = btrfs_remove_qgroup(trans, root->fs_info, sa->qgroupid); + } + + err = btrfs_end_transaction(trans, root); + if (err && !ret) + ret = err; + +out: + kfree(sa); + return ret; +} + +static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg) +{ + struct btrfs_ioctl_qgroup_limit_args *sa; + struct btrfs_trans_handle *trans; + int ret; + int err; + u64 qgroupid; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + + sa = memdup_user(arg, sizeof(*sa)); + if (IS_ERR(sa)) + return PTR_ERR(sa); + + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out; + } + + qgroupid = sa->qgroupid; + if (!qgroupid) { + /* take the current subvol as qgroup */ + qgroupid = root->root_key.objectid; + } + + /* FIXME: check if the IDs really exist */ + ret = btrfs_limit_qgroup(trans, root->fs_info, qgroupid, &sa->lim); + + err = btrfs_end_transaction(trans, root); + if (err && !ret) + ret = err; + +out: + kfree(sa); + return ret; +} + long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -3476,6 +3653,14 @@ long btrfs_ioctl(struct file *file, unsigned int return btrfs_ioctl_get_dev_stats(root, argp, 0); case BTRFS_IOC_GET_AND_RESET_DEV_STATS: return btrfs_ioctl_get_dev_stats(root, argp, 1); + case BTRFS_IOC_QUOTA_CTL: + return btrfs_ioctl_quota_ctl(root, argp); + case BTRFS_IOC_QGROUP_ASSIGN: + return btrfs_ioctl_qgroup_assign(root, argp); + case BTRFS_IOC_QGROUP_CREATE: + return btrfs_ioctl_qgroup_create(root, argp); + case BTRFS_IOC_QGROUP_LIMIT: + return btrfs_ioctl_qgroup_limit(root, argp); } return -ENOTTY; diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index a8a2230f4c5c..9dd50c4656b3 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -319,6 +319,25 @@ struct btrfs_ioctl_get_dev_stats { __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */ }; +#define BTRFS_QUOTA_CTL_ENABLE 1 +#define BTRFS_QUOTA_CTL_DISABLE 2 +#define BTRFS_QUOTA_CTL_RESCAN 3 +struct btrfs_ioctl_quota_ctl_args { + __u64 cmd; + __u64 status; +}; + +struct btrfs_ioctl_qgroup_assign_args { + __u64 assign; + __u64 src; + __u64 dst; +}; + +struct btrfs_ioctl_qgroup_create_args { + __u64 create; + __u64 qgroupid; +}; + #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ struct btrfs_ioctl_vol_args) #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ @@ -388,4 +407,12 @@ struct btrfs_ioctl_get_dev_stats { #define BTRFS_IOC_GET_AND_RESET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 53, \ struct btrfs_ioctl_get_dev_stats) +#define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \ + struct btrfs_ioctl_quota_ctl_args) +#define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \ + struct btrfs_ioctl_qgroup_assign_args) +#define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \ + struct btrfs_ioctl_qgroup_create_args) +#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \ + struct btrfs_ioctl_qgroup_limit_args) #endif |