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We know the buffer size up-front, create a struct for that. Also, I
think if we ever hit another /proc pattern this is very likely on a
different OS that could be handled by an #ifdef.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Indicate BACKUP_INTENT to vfs_openat(). Why? I have a customer request
who wants to add O_NOATIME in this case to avoid metadata updates when
a backup or virus-checking application comes along.
This does not fully handle BACKUP_INTENT correctly, this would require
become_root() appropriately. We might want to do that later after a
lot of careful security audit, but this patch independently might
already provide some infrastructure for it.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Oct 5 14:00:33 UTC 2023 on atb-devel-224
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): Fri Jun 23 18:29:40 UTC 2023 on atb-devel-224
Some log levels change because the macros don't cover all the previously used
log levels or because importance was slightly reconsidered.
Signed-off-by: Bjoern Jacke <bjacke@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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): Wed Jun 14 00:26:55 UTC 2023 on atb-devel-224
Avoid returning an uninitialized st.cached_dos_attributes.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15375
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Currently all fsctls we implement need the base fsp, not
an alternate data stream fsp. We may revisit this later
if we implement fsctls that operate on an ADS.
Remove knownfail.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15236
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Walker <awalker@ixsystems.com>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Nov 14 18:13:31 UTC 2022 on sn-devel-184
We copy smb_fname_in->base_name just to overwrite it again
immediately. Expand synthetic_smb_fname() here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
So far we only call CONNECTPATH on full paths. In the future, we'll
have a call that will not have converted a relative path to absolute
just for efficiency reasons. To give shadow_copy2 the chance to still
find the snapshot directory, pass the dirfsp down to it.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
It no longer looks at this bool, we must already have a
canonicalized path here.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This improves the following test:
time smbtorture //127.0.0.1/m -Uroot%test \
smb2.create.bench-path-contention-shared \
--option='torture:bench_path=Apps\1\2\3\4\5\6\7\8\9\10' \
--option="torture:timelimit=600" \
--option="torture:nprocs=1"
From:
open[num/s=14186,avslat=0.000044,minlat=0.000042,maxlat=0.000079]
close[num/s=14185,avslat=0.000027,minlat=0.000025,maxlat=0.000057]
to:
open[num/s=16917,avslat=0.000038,minlat=0.000035,maxlat=0.000340]
close[num/s=16916,avslat=0.000020,minlat=0.000019,maxlat=0.000104]
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
When O_PATH is specified in flags, flag bits other than O_CLOEXEC,
O_DIRECTORY, and O_NOFOLLOW are ignored.
In preparation to use openat2(), which gives an error instead of
ignoring flags, we better remove unexpected flags, callers typically
pass O_RDONLY and O_NONBLOCK.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Enforce fsp is a non-stream one in as many VFS operations as possible in
vfs_default. We really need an assert here instead of returning an error, as
otherwise he can have very hard to diagnose bugs.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15126
MR: https://gitlab.com/samba-team/samba/-/merge_requests/2643
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Aug 10 16:32:35 UTC 2022 on sn-devel-184
This prepares the later introduction of VFS_OPEN_HOW_RESOLVE_NO_SYMLINKS,
which will be used to make use of RESOLVE_NO_SYMLINKS on linux with openat2().
Right now all terminal VFS objects reject any resolve bits with ENOSYS.
So we only prepare the vfs layer for now without any real change.
But this will make backports to 4.17 much easier.
Pair-programmed-with: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Aug 6 02:39:11 UTC 2022 on sn-devel-184
The Linux prototype for openat2 looks like this:
long openat2(int dirfd, const char *pathname,
struct open_how *how, size_t size);
where "struct open_how" is defined in "linux/openat2.h". It is
designed to be extensible with further flags.
The "size" parameter is required because there is no type checking
between userland and kernelspace, so the way for Linux to find which
version of open_how is being passed in is looking at the size:
"open_how" is expected to only every grow with additional fields,
should a change be necessary in the future.
Samba does not have this problem, we can typecheck the struct and
pointers, we expect all VFS modules to be compiled against the current
vfs.h.
For now this adds no functionality, but it will make further patches
much smaller.
Pair-programmed-with: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This reverts commit 322574834f.
Not strictly a revert anymore, but for future work we do need "dirfsp"
in create_file_default() passed through the VFS.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
In a patchset that I'm working on right now there's the need to call
getrealfilename while the code does have a pathref fsp already
around. Doing the name-based call including non_widelink_open is not
necessary in this case. Start by adding the _at based call to the VFS.
For now, fall back to the name-based call. glusterfs-fuse will in a
future patch be converted to fgetxattr.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This bases File-Ids on the inode numbers again. The whole stuff was
added because at that time Apple clients
1. would be upset by inode number reusage and
2. had a client side bug in their fallback implemetentation that
assigns File-Ids on the client side in case the server provides
File-Ids of 0.
After discussion with folks at Apple it should be safe these days to
rely on the Mac to generate its own File-Ids and let Samba return 0
File-Ids.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This makes it possible to more easily handle STOPPED_ON_SYMLINK vs
OBJECT_PATH_NOT_FOUND vs OBJECT_NAME_NOT_FOUND and so on. The next
patch needs this to properly handle symlinks.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Useful if you want to stat/fstat/lstat relative to a directory without
doing chdir first.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Make it clear that being an alternate data stream handle is much more
a fsp property than a file name property.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Centralize the pattern
if (fsp->base_fsp != NULL) {
fsp = fsp->base_fsp;
}
with a descriptive name.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Make it explicit. When we add POSIX handles to SMB2 we will only
look at the handle type. lp_posix_cifsu_locktype() already does this,
but hidden inside init_strict_lock_struct() makes it hard to see.
No logic change.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Noel Power <npower@samba.org>
We missed these values which follow from MS-FSCC 2.3.80 “FSCTL_OFFLOAD_READ
Reply”:
Flags (4 bytes):
A 32-bit unsigned integer that indicates which flags were returned for this
operation. Possible values for the flags follow. All unused bits are reserved
for future use, SHOULD be set to 0, and MUST be ignored.
OFFLOAD_READ_FLAG_ALL_ZERO_BEYOND_CURRENT_RANGE (0x00000001)
=> The data beyond the current range is logically equivalent to zero.
TransferLength (8 bytes):
A 64-bit unsigned integer that contains the amount, in bytes, of data that the
Token logically represents. This value indicates a contiguous region of the
file from the beginning of the requested offset in the FileOffset field in the
FSCTL_OFFLOAD_READ_INPUT data element (section 2.3.79). This value can be
smaller than the CopyLength field specified in the FSCTL_OFFLOAD_READ_INPUT
data element, which indicates that less data was logically
represented (logically read) with the Token than was requested. The value of
this field MUST be greater than 0x0000000000000000 and MUST be aligned to a
logical sector boundary on the volume.
As we currently only implement COPY_CHUNK over the OFFLOAD VFS interface, the
VFS COPY_CHUNK backend in vfs_default just sets both values to 0 and they are
unused in the SMB frontend.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
With the removal of the call to flock LOCK_MAND, the only remaining use
of this VFS path is to register sharemodes with specific file systems.
Rename the VFS call to reflect that this is no longer related to flock.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Remove the call to kernel_flock, as this function will be deleted.
Have the function return ENOTSUP to indicate that this is not supported
by default (without a file-system specific VFS module).
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
When building in a RHEL 7 container on a RHEL 8 host, the current configure
check will detect a working SYS_copy_file_range() syscall.
Later when the resulting smbd binary is run in a RHEL 7 container on a RHEL
7 (vs 8 on the build host) host, SYS_copy_file_range() will fail with
EOPNOTSUPP.
Since the kernel support for copy_file_range() included a fallback in case
filesystems didn't implement it, the caching of copy_file_range() support can be
made a global via the static try_copy_file_range bool, there's no need to deal
with per-fileystem behaviour differences. For the curious: SYS_copy_file_range()
appeared in Linux 4.5, fallback code being vfs_copy_file_range() ->
do_splice_direct().
On current kernels the fallback function is generic_copy_file_range() (which
still calls do_splice_direct()) called from the filesystem backends directly or
from vfs_copy_file_range() -> do_copy_file_range().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14795
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This is always called via a path that mandates
smb_fname->fsp is valid.
https://bugzilla.samba.org/show_bug.cgi?id=14758
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Jul 15 05:48:05 UTC 2021 on sn-devel-184
This is always called via a path that mandates
smb_fname->fsp is valid.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14758
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
We want to re-use this and don't want to have to add forward
declarations.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14758
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
We don't need an io fd here, and we only get away
with it as we have the assert above:
SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
This will be removed next.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Change struct stat st -> SMB_STRUCT_STAT st
and just copy the struct on success, as sys_fstatat()
already does the init_stat_ex_from_stat() for us.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
