def xfs_format_xfsbuf(buf: gdb.Value) -> str:
"""
Returns a human-readable format of ``struct xfs_buf``
Args:
buf: The ``struct xfs_buf`` to decode. The value must be of type
``struct xfs_buf``.
Returns:
:obj:`str`: The human-readable representation of the
``struct xfs_buf``.
Raises:
:obj:`gdb.NotAvailableError`: The target value was not available.
"""
state = ""
bflags = decode_flags(buf['b_flags'], XFS_BUF_FLAGS)
if buf['b_pin_count']['counter']:
state += "P"
if buf['b_sema']['count'] >= 0:
state += "L"
return f"{int(buf):x} xfsbuf: logical offset {buf['b_bn']:d}, " \
f"size {buf['b_buffer_len']:d}, block number {buf['b_bn']:d}, " \
f"flags {bflags}, state {state}"
def mount_flags(mnt: gdb.Value, show_hidden: bool = False) -> str:
"""
Returns the human-readable flags of the ``struct mount``
:ref:`structure <mount_structure>`.
Args:
mnt: The :ref:`mount structure <mount_structure>` for which to
return flags
show_hidden: Whether to return hidden flags
Returns:
:obj:`str`: The mount flags in human-readable form
"""
if struct_has_member(mnt, 'mnt'):
mnt = mnt['mnt']
if show_hidden:
return decode_flags(mnt['mnt_flags'], MNT_FLAGS_HIDDEN, ",")
return decode_flags(mnt['mnt_flags'], MNT_FLAGS, ",")
def xfs_mount_flags(mp: gdb.Value) -> str:
"""
Return the XFS-internal mount flags in string form
Args:
mp: The ``struct xfs_mount`` for the file system. The value must be of
type ``struct xfs_mount``.
Returns:
:obj:`str`: The mount flags in string form
Raises:
:obj:`gdb.NotAvailableError`: The target value was not available.
"""
return decode_flags(mp['m_flags'], XFS_MOUNT_FLAGS)
def super_flags(sb: gdb.Value) -> str:
"""
Returns the flags associated with the given superblock.
Args:
sb: The ``struct super_block`` for which to return the flags.
The value must be of type ``struct super_block``.
Returns:
:obj:`str`:The flags field in human-readable form.
Raises:
:obj:`gdb.NotAvailableError`: The target value was not available.
"""
return decode_flags(sb['s_flags'], SB_FLAGS)
def dump_ail(self, args: argparse.Namespace) -> None:
try:
sb = get_super_block(args.addr)
except gdb.NotAvailableError as e:
raise CommandError(str(e)) from e
mp = xfs_mount(sb)
ail = mp['m_ail']
itemno = 0
print("AIL @ {:x}".format(int(ail)))
print("target={} last_pushed_lsn={} log_flush=".format(
int(ail['xa_target']), int(ail['xa_last_pushed_lsn'])),
end='')
# This was added in Linux v3.2 (670ce93fef93b)
if struct_has_member(ail, 'xa_log_flush'):
print("{}".format(int(ail['xa_log_flush'])))
else:
print("[N/A]")
for bitem in xfs_for_each_ail_log_item(mp):
li_type = int(bitem['li_type'])
lsn = int(bitem['li_lsn'])
item = xfs_log_item_typed(bitem)
print("{}: item={:x} lsn={} {} ".format(itemno, int(bitem.address),
lsn,
XFS_LI_TYPES[li_type][7:]),
end='')
if li_type == XFS_LI_BUF:
buf = item['bli_buf']
flags = decode_flags(item['bli_flags'], XFS_BLI_FLAGS)
print(" buf@{:x} bli_flags={}".format(int(buf), flags))
print(" {}".format(xfs_format_xfsbuf(buf)))
elif li_type == XFS_LI_INODE:
ili_flags = int(item['ili_lock_flags'])
xfs_inode = item['ili_inode']
print("inode@{:x} i_ino={} ili_lock_flags={:x} ".format(
int(xfs_inode['i_vnode'].address), int(xfs_inode['i_ino']),
ili_flags))
elif li_type == XFS_LI_EFI:
efi = item['efi_format']
print("efi@{:x} size={}, nextents={}, id={:x}".format(
int(item.address), int(efi['efi_size']),
int(efi['efi_nextents']), int(efi['efi_id'])))
elif li_type == XFS_LI_EFI:
efd = item['efd_format']
print("efd@{:x} size={}, nextents={}, id={:x}".format(
int(item.address), int(efd['efd_size']),
int(efd['efd_nextents']), int(efd['efd_id'])))
elif li_type == XFS_LI_DQUOT:
dquot = item['qli_dquot']
flags = decode_flags(dquot['dq_flags'], XFS_DQ_FLAGS)
print("dquot@{:x} flags={}".format(int(dquot), flags))
elif li_type == XFS_LI_QUOTAOFF:
qoff = item['qql_format']
print("qoff@{:x} type={} size={} flags={}".format(
int(qoff), int(qoff['qf_type']), int(qoff['qf_size']),
int(qoff['qf_flags'])))
else:
print("item@{:x}".format(int(item.address)))
itemno += 1