o pre-announce
- the behaviour of mmap(2) after munmap(2) and add/del branch(es) will change.
aufs mmap(2) function checks whether the file descriptor is currently
mmapped or not. But there is a bug in this checking, and I found it is
very hard to fix it.
Finally, I gave up this checking.
Here is a new design. While it is still being developing, if no one
stops me, I will release it on next Monday.
impact: the application who has a code such like this will be
impacted. But I geuss it is minor.
{
fd = open();
mmap(fd);
munmap();
// add or del branch(es) by this process or somone else.
mmap(fd);
}
old behaviour: the second mmap() shows you the new filedata if the
file was refreshed by add/del branch.
new behaviour: the second mmap() shows you the old filedata as the
first mmap(), even if the file is refreshed by add/del
branch.
If you close the file, and open, mmap again, then you will get the
latest filedata.
If you execute your application after add/del branch, then you will
get the latest filedata.
o bugfix
- bugfix unionctl: typo or dropped single quotation.
- bugfix unionctl: support a relative path for --whereis.
o
- begin supporting a readonly no-whiteout aufs branch of another aufs, still
testing.
- begin supporting exporting aufs via NFS, still testing.
- begin supporting LSM, still testing.
- unionctl aborts when the --whereis argument does not exist.
Junjiro Okajima
----------------------------------------------------------------------
Index: fs/aufs/branch.c
- begin supporting a readonly no-whiteout aufs branch of another aufs, still
testing.
Index: fs/aufs/dentry.c
Index: fs/aufs/super.c
Index: fs/aufs/super.h
- begin supporting a readonly no-whiteout aufs branch of another aufs, still
testing.
- begin supporting exporting aufs via NFS, still testing.
Index: fs/aufs/dir.c
- begin supporting exporting aufs via NFS, still testing.
Index: fs/aufs/f_op.c
Index: fs/aufs/i_op_add.c
Index: fs/aufs/inode.h
Index: fs/aufs/misc.c
- begin supporting LSM, still testing.
Index: util/unionctl
- bugfix: typo or dropped single quotation.
- bugfix: support a relative path for --whereis.
- abort when the --whereis argument does not exist.
Index: README
Index: local.mk
Index: fs/aufs/Makefile
Index: fs/aufs/file.h
Index: fs/aufs/i_op.c
Index: fs/aufs/opts.c
Index: fs/aufs/whout.h
Index: include/linux/aufs_type.h
Index: util/aufs.in.5
- less important changes
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