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The shell_snap VFS module plumbs into the snapshot (aka shadow-copy)
management paths used by Samba's File Server Remote VSS Protocol (FSRVP)
server.
The following shell callouts may be configured in smb.conf:
shell_snap: check path command
- Called when an FSRVP client wishes to check whether a given
share supports snapshot create/delete requests.
- The command is called with a single <share path> argument.
- The command must return 0 if <share path> is capable of being
snapshotted.
shell_snap: create command
- Called when an FSRVP client wishes to create a snapshot.
- The command is called with a single <share path> argument.
- The command must return 0 status if the snapshot was
successfully taken.
- The command must output the path of the newly created snapshot
to stdout.
shell_snap: delete command
- Called when an FSRVP client wishes to delete a snapshot.
- The command is called with <base share path> and
<snapshot share path> arguments.
- The command must return 0 status if the snapshot was
successfully removed.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Extend vfs_snapper to support the new remote snapshot creation and
deletion hooks added for FSRVP.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The "btrfs: manipulate snapshots" smb.conf parameter is disabled by
default, to encourage use of, and pass requests through to, the
vfs_snapper module.
When enabled, issue BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SNAP_DESTROY
ioctls accordingly. The ioctls are issued as root, so rely on permission
checks in the calling FSRVP server process.
Base share paths must exist as btrfs subvolumes in order to
be supported for snapshot operations.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This change adds three new VFS hooks covering snapshot manipulation:
- snap_check_path
Check whether a path supports snapshots.
- snap_create
Request the creation of a snapshot of the provided path.
- snap_delete
Request the deletion of a snapshot.
These VFS call-outs will be used in future by Samba's File Server Remote
VSS Protocol (FSRVP) server.
MS-FSVRP states:
At any given time, Windows servers allow only one shadow copy set to
be going through the creation process.
Therefore, only provide synchronous hooks for now, which can be
converted to asynchronous _send/_recv functions when the corresponding
DCE/RPC server infrastructure is in place.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
get_gpfs_fset_id already emits more detailed warnings, there is no need
to print an additional warning in the calling function.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Trying for fixup a broken AppleDouble file with a resourcefork entry
offset + length > filesystem resulted in a crashing memmove() in
ad_convert().
Add a specific safety check that stats the ._ file and limits the
resource fork length to the filesize.
While we're at it, now that we know the filesize in ad_unpack(), add
additional checks that verify this.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=11125
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Mar 26 12:39:01 CET 2015 on sn-devel-104
cephwrap_init_stat_ex_from_stat() lacks code that makes 'create'
timestamp. Besides that, it's identical to init_stat_ex_from_stat().
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
add null timespec check for atime/mtime. Also add code that stores
create_time by EA.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
The Linux fallocate syscall offers a mode parameter which can take the
following flags:
FALLOC_FL_KEEP_SIZE
FALLOC_FL_PUNCH_HOLE (since 2.6.38)
FALLOC_FL_COLLAPSE_RANGE (since 3.15)
FALLOC_FL_ZERO_RANGE (since 3.14)
The flags are not exclusive, e.g. FALLOC_FL_PUNCH_HOLE must be specified
alongside FALLOC_FL_KEEP_SIZE.
Samba currently takes a vfs_fallocate_mode enum parameter for the VFS
fallocate hook, taking either an EXTEND_SIZE or KEEP_SIZE value. This
commit changes the fallocate hook such that it accepts a uint32_t flags
parameter, in preparation for PUNCH_HOLE and ZERO_RANGE support.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
Autobuild-User(master): Ira Cooper <ira@samba.org>
Autobuild-Date(master): Thu Mar 5 18:28:44 CET 2015 on sn-devel-104
The code in gpfs.c and vfs_gpfs.h now only wraps the gpfs library.
Rename the files to gpfswrap to make it clear that this is the only
purpose of that file.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Update file headers to reflect the new code organization and reformat
for consistency.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
replace.h provides everything that is required (errno and ENOSYS).
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Merge the code for initializing the function pointers in one function.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Similar to the header files, libgpfs_gpl.so no longer exists. The
library is now always called libgpfs.so.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
gpfs_gpl.h no longer exists, everything from that header file has been
merged to gpfs.h. gpfs_fcntl.h implicitly includes gpfs.h. Simplify the
code by only looking for gpfs_fcntl.h and including that file.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
No else required after return
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Feb 26 21:22:30 CET 2015 on sn-devel-104
