Besides the comments, there's a slight change as the file config.log
will be deleted by the 'clean-gen' rule.
Generated by https://github.com/jsoref/spelling
Issue: #154
Author: Josh Soref <jsoref@users.noreply.github.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There's a newer version of zstd, without any obvious changes that would
affect our build testing coverage.
Signed-off-by: David Sterba <dsterba@suse.com>
btrfsutil.h and the Python docstrings are thorough, but I've gotten a
couple of requests for a high-level overview of the available interfaces
and example usages. Add them to README.md.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
With the previous few fixes and features, we should bump the minor
version.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We can use the new BTRFS_IOC_GET_SUBVOL_ROOTREF and
BTRFS_IOC_INO_LOOKUP_USER ioctls to allow non-root users to list
subvolumes.
This is based on a patch from Misono Tomohiro but takes a different
approach (mainly, this approach is more similar to the existing tree
search approach).
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Attempt to use the BTRFS_IOC_GET_SUBVOL_INFO ioctl (added in kernel
4.18) for subvolume_info() if not root. Also, rename
get_subvolume_info_root() -> get_subvolume_info_privileged() for
consistency with further changes.
This is based on a patch from Misono Tomohiro.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Some upcoming tests will need to create a second Btrfs filesystem, so
add support for this to the test helpers.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
These will be used for testing some upcoming changes which allow
unprivileged operations.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We're leaking file descriptors, which makes it impossible to clean up
the temporary mount point created by the test.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This has been supported since day one, but it wasn't documented.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
async became a keyword in Python 3.7, so, e.g., create_subvolume('foo',
async=True) is now a syntax error. Fix it with the Python convention of
adding a trailing underscore to the keyword (async -> async_). This is
what several other Python libraries did to handle this.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Right now, we're defaulting to top=5 (i.e, all subvolumes). The
documented default is top=0 (i.e, only beneath the given path). This is
the expected behavior. Fix it and make the test cases cover it.
Reported-by: Jonathan Lemon <bsd@fb.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Reported on IRC that the inode number limit appears to be 264, while the
actual value is 2^64. Fix that for the manual page backend by redefining
the format.
Signed-off-by: David Sterba <dsterba@suse.com>
The 'swap' is too generic and clashes with some userspace tools that
compile against btrfs, eg. snapper when including
boost::smart_ptr::scoped_array after kerncompat.h:
/usr/include/boost/smart_ptr/scoped_array.hpp:127:13: error: macro "swap" requires 2 arguments, but only 1 given
a.swap(b);
Signed-off-by: David Sterba <dsterba@suse.com>
Found using -Wmissing-prototypes in GCC. This should improve LTO
behavior.
Note that set_free_space_tree_thresholds is an unused function. Adding
inline seems to remove the unused function warning.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
pthread_t is an opaque type, not an integer one. The > 0 makes no sense
and compiler throws a warning.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Replaced bswap with _ variants bswap_32 etc. While it's a glibc
extension, all of the popular libc implementations (glibc, uClibc, musl,
BIONIC) seem to support it.
Added static inline to two functions to match little endian variants. This
fixes a linking error experienced when compiling on gcc 7.3.0 with LTO,
possibly a bug that was fixed later.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add a new section, QUOTA RESCAN, to explain why and when we need a full
quota rescan when assigning/removing qgroup relationship.
Also, since 'remove' shares the same options of 'assign', add reference
to 'assign' options for 'remove' subcommand.
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update ]
Signed-off-by: David Sterba <dsterba@suse.com>
Even though we have --rescan option, it still needs the user to manually
specify it or call quota rescan command.
This does not make much sense for the most common usecase and only
confuses users. When the rescan is not desired, the --no-rescan option
can be used, eg. when a mass qgruop assignment happens and the repeated
rescan would slow things down. This is considered a marginal usecase.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Rename the function so its name falls in line with the rest of btrfs
nomenclature. So when we change the uuid of the header it's in fact of
the buffer header. Also remove the root argument since it's used solely
to take a reference to fs_info which can be done via the mandatory eb
argument. No functional changes.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This function already takes an extent buffer that contains a reference
to the fs_info. Use that and reduce argument count. No functional
changes.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Originally print-tree uses depth first search to print trees.
This works fine until we reach 3 level trees (root node level is 2).
For tall trees whose root level is 2 or higher, DFS will mix nodes and
leaves like the following example:
Level 2 A
/ \
Level 1 B C
/ | | \
Level 0 D E F G
DFS will cause the following output sequence:
A B D E C F G
Which in term of node/leave is:
N N L L N L L
Such mixed node/leave result is sometimes hard for human to read.
This patch will introduce 2 new options, --bfs and --dfs.
--dfs: keeps the original output sequence, and to keep things
compatible it's the default behavior.
--bfs: uses breadth-first search, and will cause better output
sequence like:
A B C D E F G
Which in term of node/leave is:
N N N L L L L
Much better sorted and may become default in the future.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Introduce a new function, bfs_print_children(), to do breadth-first
search to print a node.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Introduce a new function, btrfs_next_sibling_tree_block(), which could
find any sibling tree blocks at path->lowest_level, unlike level 0
limited btrfs_next_leaf().
Since this function is more generic than btrfs_next_leaf(), also make
btrfs_next_leaf() a wrapper of btrfs_next_sibling_tree_block(), to keep
the interface the same as kernel.
This would provide the basis for later breadth-first search print-tree.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
As the @root parameter is only used to get @fs_info, use fs_info
directly instead.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Factor out main logic of btrfs_util_subvolume_info_fd(). This is a
preparation work to relax the root privilege of this function. No
functional changes.
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Copy and add 3 definitions of new unprivileged ioctls:
* BTRFS_IOC_GET_SUBVOL_INFO
* BTRFS_IOC_GET_SUBVOL_ROOTREF
* BTRFS_IOC_INO_LOOKUP_USER
from kernel definitions. They will be used to implement the version
of "btrfs subvolume list/show" that will not require root privileges.
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Some information is obsolete and updated as follows:
- add missing explanations of some options
- remove outdated explanation of "subvolrootid" mount option
- reorder/group options of "subvolume list" so it matches the help
message
- add explanation of different meanings of parent in "parent ID/UUID"
- fix indentation/spelling
- add missing comma
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
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>
At restore time, btrfs-image will try to fixup dev extents, this will
trigger a transaction.
It's normally OK to start a new transaction, but for an image with log
tree, a new transaction will increment generation, and log tree generation
will not match super block generation + 1.
There is no good way to solve it yet. Just output a warning for now.
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update error message ]
Signed-off-by: David Sterba <dsterba@suse.com>
Make the checks in check_file_extent a bit more explicit. First we check
for unknown type and fail accordingly. Then we check for inline extent
and handle it in the newly introduced check_file_extent_inline. Finally
if none of the above checks triggered then we must have a regular or
prealloc extents.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Instead of having another top-level if which checks for
'extent_num_bytes != item_inline_len' only if we are !compressed, just
move the 'if' inside the 'else' branch of the first top-level if, since
it has already checked for !compressed or not. No functional changes.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since the inline extent code can be largely self-sufficient, factor
it out from check_file_extent. No functional changes.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When using gcc8 to compile btrfs-progs, it complains as below:
ctree.c: In function 'btrfs_search_slot_for_read':
ctree.c:1249:45: warning: passing argument 3 of 'btrfs_search_slot'
discards 'const' qualifier from pointer target type
[-Wdiscarded-qualifiers]
ret = btrfs_search_slot(NULL, root, key, p, 0, 0);
Change btrfs_search_slot prototype with 'const' qualifier for argument 3.
Also fix similar problems as above change.
Signed-off-by: Su Yanjun <suyj.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Total of three conditions are tested. One for short name, one with
name length 255, the last one with more than 255.
This case should pass after commit
'btrfs-progs: change filename limit to 255 when creating subvolume'.
Signed-off-by: Su Yanjun <suyj.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Modify the file name length limit to meet the Linux naming convention.
In addition, the file name length is always bigger than 0, no need to
compare with 0 again.
Issue: #145
Signed-off-by: Su Yanjun <suyj.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When convert failed, the error messsage would look like:
create btrfs filesystem:
blocksize: 4096
nodesize: 16384
features: extref, skinny-metadata (default)
creating ext2 image file
ERROR: failed to create ext2_saved/image: -1
WARNING: an error occurred during conversion, filesystem is partially
created but not finalized and not mountable
We can only know something wrong happened during "ext2_saved/image" file
creation, but unable to know what exactly went wrong.
This patch will add the following error messages for create_image() and
its callee:
1) Sanity test error
2) Csum calculation error
3) Free ino number allocation error
4) Inode creation error
5) Inode mode change error
6) Inode link error
With all these error messages, we should be pretty easy to locate the
error without extra debugging.
Reported-by: Serhat Sevki Dincer <jfcgauss@gmail.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When pread64() returns value smaller than expected, it normally means
EIO, so just return -EIO to replace the intermediate number. So when IO
fails, we should be able to get more meaningful error number of than
EPERM.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
