Merge pull request #371 from redjard/no-userspace-btrfs2

add flag btrfs_userspace

Author: desultory

docs/configuration.md

@@ -324,6 +324,7 @@ Importing this module will run `btrfs device scan` and pull btrfs modules.
 * `autodetect_root_subvol` (true) Autodetect the root subvolume, unless `root_subvol` or `subvol_selector` is set. Depends on `hostonly`.
 * `root_subvol` - Set the desired root subvolume.
 * `_base_mount_path` (/root_base) Sets where the subvolume selector mounts the base filesytem to scan for subvolumes.
+* `btrfs_userspace` (true) Add btrfs binary to be able to mount multi-device btrfs partitions.
 
 #### ugrd.fs.resume
 

src/ugrd/fs/btrfs.py

@@ -75,6 +75,7 @@ def _process_subvol_selector(self, subvol_selector: bool) -> None:
         self["paths"] = self["_base_mount_path"]
 
 
+@contains("btrfs_userspace", message="btrfs_userspace is disabled, will not add btrfs_scan to init.")
 def btrfs_scan(self) -> str:
     """scan for new btrfs devices."""
     return 'einfo "$(btrfs device scan)"'
@@ -98,6 +99,7 @@ def autodetect_root_subvol(self):
 
 @contains("subvol_selector", message="subvol_selector is not enabled, skipping.")
 @unset("root_subvol", message="root_subvol is set, skipping.")
+@contains("btrfs_userspace", message="btrfs_userspace is not enabled, skipping.")
 def select_subvol(self) -> str:
     """Returns a POSIX shell script to list subvolumes on the root volume."""
     return f"""
@@ -134,3 +136,8 @@ def set_root_subvol(self) -> str:
     """Adds the root_subvol to the root_mount options."""
     _validate_root_subvol(self)
     return f"""setvar root_extra_options ',subvol={self["root_subvol"]}'"""
+
+@contains("btrfs_userspace", message="btrfs_userspace is disabled, skipping adding btrfs to binaries list.", log_level=30)
+def pull_btrfs_userspace(self):
+    self.logger.debug("Adding btrfs to binaries list.")
+    self["binaries"] = "btrfs"

src/ugrd/fs/btrfs.toml

@@ -1,16 +1,19 @@
-binaries = [ "btrfs" ]
 kmod_init = [ "btrfs", "crc32c" ] # crc32c is a softdep but more or less required
 
 _base_mount_path = "/root_base"
 subvol_selector = false
 autodetect_root_subvol = true
+btrfs_userspace = true
 
 [imports.config_processing]
 "ugrd.fs.btrfs" = [ "_process_root_subvol", "_process_subvol_selector" ]
 
 [imports.build_pre]
 "ugrd.fs.btrfs" = [ "autodetect_root_subvol" ]
 
+[imports.build_late]
+"ugrd.fs.btrfs" = [ "pull_btrfs_userspace" ]
+
 [imports.init_mount]
 "ugrd.fs.btrfs" = [ "btrfs_scan", "set_root_subvol", "select_subvol" ]
 
@@ -28,3 +31,4 @@ _base_mount_path = "Path"  # Set the mount point for the root filesystem when us
 root_subvol = "str"  # Set the default btrfs subvolume for the root filesystem
 subvol_selector = "bool"  # Select a btrfs subvolume for the root partition at runtime
 autodetect_root_subvol = "bool"  # Automatically detect the root subvolume
+btrfs_userspace = "bool"  # Add btrfs binary to be able to mount multi-device btrfs partitions