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This implements two core changes:
* use NTTIME instead of struct timespec at the database layer
* use struct timespec { .tv_nsec = SAMBA_UTIME_OMIT } as special sentinel
value in smbd when processing timestamps
Using NTTIME at the database layer is only done to avoid storing the special
struct timespec sentinel values on disk. Instead, with NTTIME the sentinel value
for an "unset" timestamp is just 0 on-disk.
The NTTIME value of 0 gets translated by nt_time_to_full_timespec() to the
struct timespec sentinel value { .tv_nsec = SAMBA_UTIME_OMIT }.
The function is_omit_timespec() can be used to check this.
Beside nt_time_to_full_timespec(), there are various other new time conversion
functions with *full* in their name that can be used to safely convert between
different types with the changed sentinel value.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=7771
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Note this isn't identical to unlink() as
this must cope with (flags & AT_REMOVEDIR),
which is identical to rmdir(). It calls
either unlink or rmdir depending on the
flags parameter.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
st_ex_file_id is an immutable, never reused numeric identifier for objects in a
filesystem.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
st_ex_itime is an immutable original birth time aka instantiation time. Set when
a file is created, never changes thereafter. May not be set by the client.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
libcephfs doesn't currently offer an fdopendir equivalent, so the
existing implementation peeks at fsp->fsp_name->base_name, which can
break if vfs_ceph is used under a separate path-munging VFS module.
Return ENOSYS instead and rely on existing OpenDir_fsp() fallback.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The @list buffer may be uninitialised prior to ceph_flistxattr()
invocation, so only log the address.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13940
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Fri May 10 12:59:05 UTC 2019 on sn-devel-184
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13918
Signed-off-by: Robert Sander <r.sander@heinlein-support.de>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu May 2 19:34:11 UTC 2019 on sn-devel-184
libcephfs disables ACL support by default and returns -EOPNOTSUPP in the
POSIX ACL get/setxattr paths as a result. Enable support by setting the
following Ceph config parameters during mount:
client acl type = posix_acl
fuse default permissions = false
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13896
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
b9e91d2a8e41a43d7ebb7d7eed807a7d8de9b329 added fd==-1 checks to the
lseek() path to handle "stat opens". Current reply.c and
smb2_ioctl_filesys.c callers do not invoke SMB_VFS_LSEEK() with
stat-open fsp structs, so the fd==-1 checks can be removed from the
VFS.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The cephwrap_fchown() and cephwrap_fchmod() wrappers call the
corresponding libcephfs functions. It doesn't make sense to make this
logic dependent on regular fchown()/fchmod() function presence, so remove
the ifdefs.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Both libcephfs functions are supported and capable of extending files,
so fallback can be dropped.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13807
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
SMB_VFS_FALLOCATE() calls atop a vfs_ceph share currently fall through
to vfs_default, which results in a local filesystem I/O attempt using a
libcephfs file-descriptor. Add the missing fallocate hook to vfs_ceph.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13807
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
vfs_ceph has quite a few occurrences of:
if (result < 0) {
WRAP_RETURN(result); /* calls return */
} else {
...
}
This change drops the superfluous else {} encapsulation and also removes
duplication of ceph statx debug messages.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Wed Feb 20 13:56:09 CET 2019 on sn-devel-144
Finally: use the new dos_mode_at_send() in the directory enumeration
loop. This means that fetching the DOS attributes for directory entries
is done asynchronously with regard to the enumeration loop.
As the DOS attribute is typically read from an extended attribute in the
filesytem, this avoids sequentially blocking on IO. If the IO subsystem
is slow servicing these request, enabling async processing can result in
performance improvements.
A parametric option
smbd:async dosmode = true | false (default: false)
can be used to enable the new async processing.
Simulating slow IO with usleep(5000) in the synchronous and asynchronous
versions of SMB_VFS_GET_DOS_ATTRIBUTES(), the results of enumerating a
directory with 10,000 files are:
smbd:async dosmode = no:
$ time bin/smbclient -U slow%x //localhost/test -c "ls dir\*" > /dev/null
real 0m59.597s
user 0m0.024s
sys 0m0.012s
smbd:async dosmode = yes:
$ time bin/smbclient -U slow%x //localhost/test -c "ls dir\*" > /dev/null
real 0m0.698s
user 0m0.038s
sys 0m0.025s
Performance gains in real world workloads depends on whether the actual
IO requests can be merged and parallelized by the kernel. Without such
wins at the IO layer, the async processing may even be slower then the
sync processing due to the additional overhead.
The following parameters can be used to adapt async processing behaviour
for specific workloads and systems:
aio max threads = X (default: 100)
smbd:max async dosmode = Y (default: "aio max threads" * 2)
By default we have at most twice the number of async requests in flight
as threads provided by the underlying threadpool. This ensures a worker
thread that finishes a job can directly pick up a new one without going
to sleep.
It may be advisable to reduce the number of threads to avoid scheduling
overhead while also increasing "smbd:max async dosmode".
Note that we disable async processing for certain VFS modules in the VFS
connect function to avoid the overhead of triggering the sync fallback
in dos_mode_at_send(). This is done for VFS modules that implement the
sync SMB_VFS_GET_DOS_ATTRIBUTES(), but not the async version (gpfs), and
for VFS modules that don't share a real filesystem where fchdir() can be
used (ceph, gluster). It is disabled for catia, because we realized that
the catia name translation macros used on
fsps (CATIA_FETCH_FSP_[PRE|POST]_NEXT) have a bug (#13547).
We use threadpool = smb_vfs_ev_glue_tp_chdir_safe() and then
pthreadpool_tevent_max_threads(threadpool) to get the number of maximum
worker threads which matches the pool used by the low level
SMB_VFS_GETXATTRAT_[SEND|RECV] implementation in vfs_default.
This is a terrible abstraction leak that should be removed in the future
by maybe making it possible to ask a VFS function which threadpool it
uses, internally suporting chaining so VFS function FOO that internally
uses BAR can forward the question to BAR.
On a hyphotetical system that had a getxattrat(dirfd, path, ...)
syscall and at the same time doesn't support per-thread current working
directories (eg FreeBSD doesn't have the latter) but has support for
per-thread-credentials, pthreadpool_tevent_max_threads() on the
tp_chdir_safe threadpool returns 1.
So when hooking the hyphotetical getxattrat() into the async
SMB_VFS_GETXATTRAT_[SEND|RECV] implementation in an VFS module, the
implementation could use the tp_path_safe threadpool, but the SMB2
layer would use the wrong threadpool in the call to
pthreadpool_tevent_max_threads(), resulting in no parallelism.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Instead, match vfs_gluster behaviour and require that users explicitly
disable "kernel share modes".
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13506
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Now I understand the use of the mask in POSIX ACLs
this extra step is no longer needed.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Now I understand the use of the mask in POSIX ACLs
this extra step is no longer needed.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Now I understand the use of the mask in POSIX ACLs
this extra step is no longer needed.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
As found by Jeremy, VFS modules that don't provide pread_send() or
pwrite_send() hooks result in vfs_default fallback, which is
catastrophic for VFS modules with non-mounted filesystems such as
vfs_ceph.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13425
Reported-by: Jeremy Allison <jra@samba.org>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Centralize error handling.
https://bugzilla.samba.org/show_bug.cgi?id=13424
Signed-off-by: Vandana Rungta <vrungta@amazon.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed May 9 04:28:11 CEST 2018 on sn-devel-144
All code in Samba now uses SMB_VFS_PWRITE or SMB_VFS_PWRITE_SEND.
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): Sat May 5 01:38:07 CEST 2018 on sn-devel-144
All code in Samba now uses SMB_VFS_PREAD or SMB_VFS_PREAD_SEND.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
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): Wed May 2 01:06:28 CEST 2018 on sn-devel-144
This will allow me to ultimately simplify the VFS by removing the synchronous
fsync VFS call.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13412
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): Mon Apr 30 21:48:55 CEST 2018 on sn-devel-144
Adding the fs_capabilities() hook to the CephFS VFS module avoids
fallback to the vfs_default code-path, which calls statvfs() against the
share path on the *local* filesystem.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13208
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Mon Dec 18 13:32:00 CET 2017 on sn-devel-144
When provided a '/' path (i.e. CephFS root), vfs_ceph does a *local*
chdir() to the share path. This breaks smb client directory listings.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12911
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Fri Jul 21 19:10:46 CEST 2017 on sn-devel-144
We need to migrate all pathname based VFS calls to use a struct
to finish modernising the VFS with extra timestamp and flags parameters.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Richard Sharpe <realrichardsharpe@gmail.com>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Jul 1 07:20:28 CEST 2017 on sn-devel-144
We need to migrate all pathname based VFS calls to use a struct
to finish modernising the VFS with extra timestamp and flags parameters.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Richard Sharpe <realrichardsharpe@gmail.com>
