Add inhibitor for unsupported XFS

Kernel in RHEL 10 drops support of XFS v4 format file systems and such
file systems will not be possible to mount there anymore. Also, RHEL 10
systems will be challenged by Y2K38 problem. XFS file system resolves
that by `bigtime` feature, however, this feature could be manually
disabled when creating the file system and mainly it's available since
RHEL 9. So all XFS file systems created earlier will not have this
enabled - unless users do it on RHEL 9 manually. Note that this will be
problem for all systems with XFS which upgraded from previous RHEL
versions.

For this reason, inhibit the upgrade if any XFS file systems specified
in `/etc/fstab` have old XFS v4 format (detect `crc=0`).

Instead of inhibiting upgrade when the `bigtime` feature is disabled
(`bigtime=0` or missing) a low severity report is created as there is
still time until this issue will be present and other solutions are
being worked on.

Introduces new model `XFSInfoFacts` which collects parsed information
about all XFS file systems specified in /etc/fstab. Note that as we use
only a few values from `xfs_info` utility, models specify now just this
limited amount of values as well to limit the burden of maintanance and
risk of issues. However expected design of the model is already prepared
and other expected fields are commented out in the code to make the
further extension in future more simple for others. All values of XFS
attributes are now represented as strings.

JIRA: RHELMISC-8212, RHEL-60034, RHEL-52309

repos/system_upgrade/common/actors/xfsinfoscanner/actor.py

@@ -1,22 +1,32 @@
 from leapp.actors import Actor
 from leapp.libraries.actor.xfsinfoscanner import scan_xfs
-from leapp.models import StorageInfo, XFSPresence
+from leapp.models import StorageInfo, XFSInfoFacts, XFSPresence
 from leapp.tags import FactsPhaseTag, IPUWorkflowTag
 
 
 class XFSInfoScanner(Actor):
     """
-    This actor scans all mounted mountpoints for XFS information
+    This actor scans all mounted mountpoints for XFS information.
+
+    The actor checks the `StorageInfo` message, which contains details about
+    the system's storage. For each mountpoint reported, it determines whether
+    the filesystem is XFS and collects information about its configuration.
+    Specifically, it identifies whether the XFS filesystem is using `ftype=0`,
+    which requires special handling for overlay filesystems.
+
+    The actor produces two types of messages:
+
+    - `XFSPresence`: Indicates whether any XFS use `ftype=0`, and lists the
+      mountpoints where `ftype=0` is used.
+
+    - `XFSInfoFacts`: Contains detailed metadata about all XFS mountpoints.
+      This includes sections parsed from the `xfs_info` command.
 
-    The actor will check each mountpoint reported in the StorageInfo message, if the mountpoint is a partition with XFS
-    using ftype = 0. The actor will produce a message with the findings.
-    It will contain a list of all XFS mountpoints with ftype = 0 so that those mountpoints can be handled appropriately
-    for the overlayfs that is going to be created.
     """
 
     name = 'xfs_info_scanner'
     consumes = (StorageInfo,)
-    produces = (XFSPresence,)
+    produces = (XFSPresence, XFSInfoFacts,)
     tags = (FactsPhaseTag, IPUWorkflowTag,)
 
     def process(self):

repos/system_upgrade/common/actors/xfsinfoscanner/libraries/xfsinfoscanner.py

@@ -1,13 +1,74 @@
 import os
+import re
 
 from leapp.libraries.stdlib import api, CalledProcessError, run
-from leapp.models import StorageInfo, XFSPresence
+from leapp.models import (
+    StorageInfo,
+    XFSInfo,
+    XFSInfoData,
+    XFSInfoFacts,
+    XFSInfoLog,
+    XFSInfoMetaData,
+    XFSInfoNaming,
+    XFSInfoRealtime,
+    XFSPresence
+)
+
+
+def scan_xfs():
+    storage_info_msgs = api.consume(StorageInfo)
+    storage_info = next(storage_info_msgs, None)
+
+    if list(storage_info_msgs):
+        api.current_logger().warning(
+            'Unexpectedly received more than one StorageInfo message.'
+        )
+
+    fstab_data = set()
+    mount_data = set()
+    if storage_info:
+        fstab_data = scan_xfs_fstab(storage_info.fstab)
+        mount_data = scan_xfs_mount(storage_info.mount)
+
+    mountpoints = fstab_data | mount_data
+
+    xfs_infos = {}
+    for mountpoint in mountpoints:
+        content = read_xfs_info(mountpoint)
+        if content is None:
+            continue
+
+        xfs_info = parse_xfs_info(content)
+        xfs_infos[mountpoint] = xfs_info
+
+    mountpoints_ftype0 = [
+        mountpoint
+        for mountpoint in xfs_infos
+        if is_without_ftype(xfs_infos[mountpoint])
+    ]
+
+    # By now, we only have XFS mountpoints and check whether or not it has
+    # ftype = 0
+    api.produce(XFSPresence(
+        present=len(mountpoints) > 0,
+        without_ftype=len(mountpoints_ftype0) > 0,
+        mountpoints_without_ftype=mountpoints_ftype0,
+    ))
+
+    api.produce(
+        XFSInfoFacts(
+            mountpoints=[
+                generate_xfsinfo_for_mountpoint(xfs_infos[mountpoint], mountpoint)
+                for mountpoint in xfs_infos
+            ]
+        )
+    )
 
 
 def scan_xfs_fstab(data):
     mountpoints = set()
     for entry in data:
-        if entry.fs_vfstype == "xfs":
+        if entry.fs_vfstype == 'xfs':
             mountpoints.add(entry.fs_file)
 
     return mountpoints
@@ -16,49 +77,116 @@ def scan_xfs_fstab(data):
 def scan_xfs_mount(data):
     mountpoints = set()
     for entry in data:
-        if entry.tp == "xfs":
+        if entry.tp == 'xfs':
             mountpoints.add(entry.mount)
 
     return mountpoints
 
 
-def is_xfs_without_ftype(mp):
-    if not os.path.ismount(mp):
-        # Check if mp is actually a mountpoint
-        api.current_logger().warning('{} is not mounted'.format(mp))
-        return False
+def read_xfs_info(mp):
+    if not is_mountpoint(mp):
+        return None
+
     try:
-        xfs_info = run(['/usr/sbin/xfs_info', '{}'.format(mp)], split=True)
+        result = run(['/usr/sbin/xfs_info', '{}'.format(mp)], split=True)
     except CalledProcessError as err:
-        api.current_logger().warning('Error during command execution: {}'.format(err))
-        return False
-
-    for l in xfs_info['stdout']:
-        if 'ftype=0' in l:
-            return True
-
-    return False
-
+        api.current_logger().warning(
+            'Error during command execution: {}'.format(err)
+        )
+        return None
 
-def scan_xfs():
-    storage_info_msgs = api.consume(StorageInfo)
-    storage_info = next(storage_info_msgs, None)
+    return result['stdout']
 
-    if list(storage_info_msgs):
-        api.current_logger().warning('Unexpectedly received more than one StorageInfo message.')
 
-    fstab_data = set()
-    mount_data = set()
-    if storage_info:
-        fstab_data = scan_xfs_fstab(storage_info.fstab)
-        mount_data = scan_xfs_mount(storage_info.mount)
-
-    mountpoints = fstab_data | mount_data
-    mountpoints_ftype0 = list(filter(is_xfs_without_ftype, mountpoints))
+def is_mountpoint(mp):
+    if not os.path.ismount(mp):
+        # Check if mp is actually a mountpoint
+        api.current_logger().warning('{} is not mounted'.format(mp))
+        return False
 
-    # By now, we only have XFS mountpoints and check whether or not it has ftype = 0
-    api.produce(XFSPresence(
-        present=len(mountpoints) > 0,
-        without_ftype=len(mountpoints_ftype0) > 0,
-        mountpoints_without_ftype=mountpoints_ftype0,
-    ))
+    return True
+
+
+def parse_xfs_info(content):
+    """
+    This parser reads the output of the ``xfs_info`` command.
+
+    In general the pattern is::
+
+        section =sectionkey key1=value1 key2=value2, key3=value3
+                = key4=value4
+        nextsec =sectionkey sectionvalue  key=value otherkey=othervalue
+
+    Sections are continued over lines as per RFC822.  The first equals
+    sign is column-aligned, and the first key=value is too, but the
+    rest seems to be comma separated.  Specifiers come after the first
+    equals sign, and sometimes have a value property, but sometimes not.
+
+    NOTE: This function is adapted from [1]
+
+    [1]: https://github.com/RedHatInsights/insights-core/blob/master/insights/parsers/xfs_info.py
+    """
+
+    xfs_info = {}
+
+    info_re = re.compile(r'^(?P<section>[\w-]+)?\s*' +
+                         r'=(?:(?P<specifier>\S+)(?:\s(?P<specval>\w+))?)?' +
+                         r'\s+(?P<keyvaldata>\w.*\w)$'
+                         )
+    keyval_re = re.compile(r'(?P<key>[\w-]+)=(?P<value>\d+(?: blks)?)')
+
+    sect_info = None
+
+    for line in content:
+        match = info_re.search(line)
+        if match:
+            if match.group('section'):
+                # Change of section - make new sect_info dict and link
+                sect_info = {}
+                xfs_info[match.group('section')] = sect_info
+            if match.group('specifier'):
+                sect_info['specifier'] = match.group('specifier')
+                if match.group('specval'):
+                    sect_info['specifier_value'] = match.group('specval')
+            for key, value in keyval_re.findall(match.group('keyvaldata')):
+                sect_info[key] = value
+
+    # Normalize strings
+    xfs_info = {
+        str(section): {
+            str(attr): str(value)
+            for attr, value in sect_info.items()
+        }
+        for section, sect_info in xfs_info.items()
+    }
+
+    return xfs_info
+
+
+def is_without_ftype(xfs_info):
+    return xfs_info['naming'].get('ftype', '') == '0'
+
+
+def generate_xfsinfo_for_mountpoint(xfs_info, mountpoint):
+    result = XFSInfo(
+        mountpoint=mountpoint,
+        meta_data=XFSInfoMetaData(
+            device=xfs_info['meta-data']['specifier'],
+            bigtime=xfs_info['meta-data'].get('bigtime'),
+            crc=xfs_info['meta-data'].get('crc'),
+        ),
+        data=XFSInfoData(
+            bsize=xfs_info['data']['bsize'],
+            blocks=xfs_info['data']['blocks']
+        ),
+        naming=XFSInfoNaming(
+            ftype=xfs_info['naming']['ftype']
+        ),
+        log=XFSInfoLog(
+            bsize=xfs_info['log']['bsize'],
+            blocks=xfs_info['log']['blocks']
+        ),
+        realtime=XFSInfoRealtime(),
+    )
+
+    return result