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authorKevin Hao <kexin.hao@windriver.com>2020-07-14 08:53:23 +0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2020-07-18 11:06:31 +0100
commitb617cd5b472d0de89cf6ec0f5e0e92a7b2c4f6fc (patch)
tree238f6b7b7e70001219bfb82fd31ca983df43f849 /scripts
parent2212d938c50c978d1a608fcdb7400d424f0a1763 (diff)
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wic/filemap: Fall back to standard copy when no way to get the block map
For some filesystems, such as aufs which may be used by docker container, don't support either the SEEK_DATA/HOLE or FIEMAP to get the block map. So add a FileNobmap class to fall back to standard copy when there is no way to get the block map. [Yocto #12988] (From OE-Core rev: 7934ed49179242f15b413c0275040a3bb6b68876) Signed-off-by: Kevin Hao <kexin.hao@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/lib/wic/filemap.py28
1 files changed, 27 insertions, 1 deletions
diff --git a/scripts/lib/wic/filemap.py b/scripts/lib/wic/filemap.py
index f8c6e09d01..4d9da28172 100644
--- a/scripts/lib/wic/filemap.py
+++ b/scripts/lib/wic/filemap.py
@@ -469,6 +469,29 @@ class FilemapFiemap(_FilemapBase):
% (first_prev, last_prev))
yield (first_prev, last_prev)
+class FilemapNobmap(_FilemapBase):
+ """
+ This class is used when both the 'SEEK_DATA/HOLE' and FIEMAP are not
+ supported by the filesystem or kernel.
+ """
+
+ def __init__(self, image, log=None):
+ """Refer the '_FilemapBase' class for the documentation."""
+
+ # Call the base class constructor first
+ _FilemapBase.__init__(self, image, log)
+ self._log.debug("FilemapNobmap: initializing")
+
+ def block_is_mapped(self, block):
+ """Refer the '_FilemapBase' class for the documentation."""
+ return True
+
+ def get_mapped_ranges(self, start, count):
+ """Refer the '_FilemapBase' class for the documentation."""
+ self._log.debug("FilemapNobmap: get_mapped_ranges(%d, %d(%d))"
+ % (start, count, start + count - 1))
+ yield (start, start + count -1)
+
def filemap(image, log=None):
"""
Create and return an instance of a Filemap class - 'FilemapFiemap' or
@@ -482,7 +505,10 @@ def filemap(image, log=None):
try:
return FilemapFiemap(image, log)
except ErrorNotSupp:
- return FilemapSeek(image, log)
+ try:
+ return FilemapSeek(image, log)
+ except ErrorNotSupp:
+ return FilemapNobmap(image, log)
def sparse_copy(src_fname, dst_fname, skip=0, seek=0,
length=0, api=None):