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OneFS provides the bulk directory enumeration syscall readdirplus(). This
syscall has the same semantics as the NFSv3 READDIRPLUS command, returning
a batch of directory entries with prefetched stat information via one
syscall.
This commit wraps the readdirplus() call in the existing POSIX
readdir/seekdir VFS interface. By default a batch of 128 directory entries
are optimistically read from the kernel into a global cache, and fed to
iterative calls of VFS_OP_READDIR.
The global buffers could be avoided in the future by hanging connection
specific buffers off the conn struct.
Added new parameter "onefs:use readdirplus" which toggles usage of this
code on or off.
By default this VFS call is a NOOP, but the onefs vfs module takes advantage
of it to initialize direntry search caches at the beginning of each
TRANS2_FIND_FIRST, TRANS2_FIND_NEXT, SMBffirst, SMBsearch, and SMBunique
* VFS_OP_READDIR can now provide stat information, take advantage of it
if it's available
* is_visible_file(): optimistically expect the provided stat buffer is
already valid
* dptr_ReadDirName(): refactor code for easier readability, functionality
is the same
* this allows VFS implementations that prefetch stat information on
readdir to return it through one VFS call
* backwards compatibility is maintained by passing in NULL
* if the system readdir doesn't return stat info, the stat struct is
set to invalid
This ensures that getting/stting a security descriptor does not
contend an oplock. The correct access checks will be still be done in
the kernel on the get/set rather than the open.
A few functions in oplocks_onefs.c need to be accessed from the onefs
vfs module. It would be ideal if oplocks were implemented at the vfs
layer, but since they aren't yet, a new header is added to
source3/include to make these functions available to the onefs vfs
module. oplocks_onefs.o doesn't need to be linked into the onefs vfs
module explicitly, since it is already linked into smbd by default.
Unlinking a file while still holding an oplock can cause problems with
kernel oplocks. This simply releases the oplock before actually
unlinking the file.
Here is a short description for each of the new capability flags:
KOPLOCKS_LEVEL2_SUPPORTED: Level 2 oplocks are supported natively in
the kernel.
KOPLOCKS_DEFERRED_OPEN_NOTIFICATION: The kernel notifies deferred
openers when they can retry the open.
KOPLOCKS_TIMEOUT_NOTIFICATION: The kernel notifies smbds when an
oplock break times out.
KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION: The kernel notifies smbds when an
oplock is broken.
This replaces release_level2_oplocks_on_change with
contend_level2_oplock_begin/end in order to contend level2 oplocks
throughout an operation rather than just at the begining. This is
necessary for some kernel oplock implementations, and also lays the
groundwork for better correctness in Samba's standard level2 oplock
handling. The next step for non-kernel oplocks is to add additional
state to the share mode lock struct that prevents any new opens from
granting oplocks while a contending operation is in progress.
All operations that contend level 2 oplocks are now correctly spanned
except for aio and synchronous writes. The two write paths both have
non-trivial error paths that need extra care to get right.
RAW-OPLOCK and the rest of 'make test' are still passing with this
change.
The Win7-beta domain process has changed. It no longer uses SAMR for
setting the password, and instead uses a ldap modify on a SASL
encrypted ldap connection. We didn't handle that as the unicodePwd
attribute has a dual use, holding the nt style MD4 hases for DRS
replication, but holding a UTF-16 plaintext password for a LDAP
modify.
This patch copes with the ldap unicodePwd modify by recognising the
format and creating the correct attributes on the fly. Note that this
assumes we will never get a unicodePwd attribute set in NT MD4 format
with the first 2 and last 2 bytes set to 0x22 0x00.
Andrew Bartlett is looking at a more robust solution, possibly using a
flag to say that this modify came via ldap, and not internal ldb
calls.
Win7-beta.
The first problem is that we removed the dnsDomain attribute a while
back, so we were returning NULL for two fields. We now return the
realm.
The second problem is that Win7-beta sends the domain in the form the
user typed it, so it may be in either the short or long form. We check
for the short form and convert if needed.
This reverts commit 487f5e7b4768cfe9e511b0ba56f16c411e21f702.
I was confused about the real meaning of find_domain_from_name_noinit()
vs. find_domain_from_name(). We don't need the connection established
here, just the domain struct which gets initialized by rescan_trusted_domains().
Sorry for the noise.
Michael
This changelist allows for the addition of custom performance
monitoring modules through smb.conf. Entrypoints in the main message
processing code have been added to capture the command, subop, ioctl,
identity and message size statistics.
When compiling Samba 4's IDL files buildsystem assumes that compiler
knows about -xc, which is a gcc spesefic switch as this switch isn't
needed on gcc either the flag was uneeded and can be removed. Thus no
warnings on non gcc systems.
Signed-off-by: Torgeir Lerkerod <Torgeir.Lerkerod@gmail.com>
Signed-off-by: Jelmer Vernooij <jelmer@samba.org>
