Use the return value of listxattr instead of tokenizing.
The end of the extended attribute list is indicated by the return value,
not an empty list item (two consecutive NULs). Using strtok in this way
thus sometimes caused add_xattr_item to reuse stack data in xattr_list
from the previous invocation, thus querying attributes that are not
actually in the file's xattr list.
Issue: #194
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Vladimir Panteleev <git@vladimir.panteleev.md>
Signed-off-by: David Sterba <dsterba@suse.com>
Create directory for all sources that can be used by anything that's not
rellated to a relevant kernel part, all common functions, helpers,
utilities that do not fit any other specific category.
The traditional location would be probably lib/ with all things that are
statically linked to the main binaries, but we have libbtrfs and
libbtrfsutil so this would be confusing.
Signed-off-by: David Sterba <dsterba@suse.com>
Similar to the changes where strerror(errno) was converted, continue
with the remaining cases where the argument was stored in another
variable.
The savings in object size are about 4500 bytes:
$ size btrfs.old btrfs.new
text data bss dec hex filename
805055 24248 19748 849051 cf49b btrfs.old
804527 24248 19748 848523 cf28b btrfs.new
Signed-off-by: David Sterba <dsterba@suse.com>
In case add_inode_items returned -EEXIST, traverse_directory would
handle the condition and still continue under certain circumstances, but
it would not reset the error code, leading to spurious failure later.
This patch fixes that.
Pull-request: #124
Author: Matthias Benkard <matthias.benkard@egym.de>
Signed-off-by: David Sterba <dsterba@suse.com>
mkfs-test 016 "rootdir-bad-symbolic-link" fails when selinux is enabled.
This is because add_xattr_item() uses getxattr() and tries to follow a
bad symbolic link for selinux item, which causes ENOENT error.
The line above already uses llistxattr() for getting list of xattr in
order not to follow a symbolic link, so just use lgetxattr() too.
Signed-off-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
If we have a symbolic link in rootdir pointing to non-existing location,
mkfs.btrfs --rootdir will just fail:
------
$ mkfs.btrfs -f --rootdir /tmp/rootdir/ /dev/data/btrfs
btrfs-progs v4.15.1
See http://btrfs.wiki.kernel.org for more information.
ERROR: ftw subdir walk of /tmp/rootdir/ failed: No such file or directory
------
[CAUSE]
Commit 599a0abed5 ("btrfs-progs: mkfs/rootdir: Use over-reserve method
to make size estimate easier") add extra ftw walk to estimate the
filesystem size.
Such default ftw walk will follow symbolic link and gives ENOENT error.
[FIX]
Use nftw() to specify FTW_PHYS so we won't follow symbolic link for size
calculation.
Issue: #109
Reported-by: Alexander Kanavin <alexander.kanavin@intel.com>
Fixes: 599a0abed5 ("btrfs-progs: mkfs/rootdir: Use over-reserve method to make size estimate easier")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Just like convert, we need extra check against sector size for creating
inline extent.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The bug is exposed by mkfs test case 009, with D=asan.
We are leaking memory of parent_dir_entry->path() which ,except the
rootdir, is allocated by strdup().
Before fixing it, unifiy the allocation of parent_dir_entry() to heap
allocation.
Then fix it by adding "free(parent_dir_entry->path);" in
traverse_directory() and error handler.
Issue: #92
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Do a cleanup. Also make it consistent with kernel. Use fs_info instead
of root for BTRFS_MAX_INLINE_DATA_SIZE, since maybe in some situation we
do not know root, but just know fs_info.
Change macro to inline function to be consistent with kernel. And
change the function body to match kernel.
Signed-off-by: Gu Jinxiang <gujx@cn.fujitsu.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Make --shrink a separate option for --rootdir, and change the default to
off.
The shrinking behaviour is not a commonly used feature but can be useful
for creating minimal pre-filled images, in one step, without requiring
to mount.
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update changelog and error messages ]
Signed-off-by: David Sterba <dsterba@suse.com>
Use the new dev extent based shrink method for rootdir option. This
restores the original behaviour when --rootdir will create a minimal
filesystem size.
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Use an easier method to calculate the estimate device size for
mkfs.btrfs --rootdir.
The new method will over-estimate, but should ensure we won't encounter
ENOSPC.
It relies on the following data:
1) number of inodes -- for metadata chunk size
2) rounded up data size of each regular inode -- for data chunk size
Total meta chunk size = round_up(nr_inode * (PATH_MAX * 3 + sectorsize),
min_chunk_size) * profile_multiplier
PATH_MAX is the maximum size possible for INODE_REF/DIR_INDEX/DIR_ITEM.
Sectorsize is the maximum size possible for inline extent.
min_chunk_size is 8M for SINGLE, and 32M for DUP, get from
btrfs_alloc_chunk().
profile_multiplier is 1 for Single, 2 for DUP.
Total data chunk size is much easier.
Total data chunk size = round_up(total_data_usage, min_chunk_size) *
profile_multiplier
Total_data_usage is the sum of *rounded up* size of each regular inode
use.
min_chunk_size is 8M for SINGLE, 64M for DUP, get from btrfS_alloc_chunk().
Same profile_multiplier for meta.
This over-estimate calculate is, of course inacurrate, but since we will
later shrink the fs to its real usage, it doesn't matter much now.
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update comments ]
Signed-off-by: David Sterba <dsterba@suse.com>
Also rename the function from size_sourcedir() to mkfs_size_dir().
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
In fact, --rootdir option is getting more and more independent from
normal mkfs code.
So move image creation function, make_image() and its related code to
mkfs/rootdir.[ch], and rename the function to btrfs_mkfs_fill_dir().
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Vladimir Panteleev