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Instead of hand-tuning all the cases that are below this piece of code, this is
a general case that we can catch upfront.
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This reverts commit 6763730304627a58139450fd3e03a0ce48e31bb9.
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Signed-off-by: Jim McDonough <jmcd@samba.org>
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When a write cache is empty and we write one 0, there is no point in actually
writing into the write cache, which would trigger a potentially superfluous
write cache flush. We can rely on posix semantics to give us 0's when
subsequent read calls want to read from file areas not written yet.
Jeremy, please check!
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In case of the one-byte allocating writes we don't work work optimally because
we start the write cache at the current offset. This patch tries to avoid this
case.
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variable.
Jeremy.
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BASE-DELAYWRITE and also RAW-CLOSE.
Jeremy.
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"Normal" non truncate writes always cause the timestamp to
be set on close. Once a close is done on a handle this can
reset the sticky write time to current time also.
Updated smbtorture4 confirms this.
Jeremy.
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a lot easier.
Jeremy.
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SMB_VFS_CHFLAGS isn't actually getting the smb_filename struct for now
since it only operates on the basefile. This is the strategy for all
path-based operations that will never actually operate on a stream.
By clarifying the meaning of path based operations that don't take an
smb_filename struct, modules that implement streams such as vfs_onefs
no longer need to implement SMB_VFS_CHFLAGS to ensure it's only called
on the base_name.
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Don't remove pending writetime changes if no time changes
are sent in UNIX_BASIC infolevel.
Jeremy
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This patch introduces two new temporary helper functions
vfs_stat_smb_fname and vfs_lstat_smb_fname. They basically allowed me
to call the new smb_filename version of stat, while avoiding plumbing
it through callers that are still too inconvenient. As the conversion
moves along, I will be able to remove callers of this, with the goal
being to remove all callers.
There was also a bug in create_synthetic_smb_fname_split (also a
temporary utility function) that caused it to incorrectly handle
filenames with ':'s in them when in posix mode. This is now fixed.
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This patch introduces
struct stat_ex {
dev_t st_ex_dev;
ino_t st_ex_ino;
mode_t st_ex_mode;
nlink_t st_ex_nlink;
uid_t st_ex_uid;
gid_t st_ex_gid;
dev_t st_ex_rdev;
off_t st_ex_size;
struct timespec st_ex_atime;
struct timespec st_ex_mtime;
struct timespec st_ex_ctime;
struct timespec st_ex_btime; /* birthtime */
blksize_t st_ex_blksize;
blkcnt_t st_ex_blocks;
};
typedef struct stat_ex SMB_STRUCT_STAT;
It is really large because due to the friendly libc headers playing macro
tricks with fields like st_ino, so I renamed them to st_ex_xxx.
Why this change? To support birthtime, we already have quite a few #ifdef's at
places where it does not really belong. With a stat struct that we control, we
can consolidate the nanosecond timestamps and the birthtime deep in the VFS
stat calls.
At this moment it is triggered by a request to support the birthtime field for
GPFS. GPFS does not extend the system level struct stat, but instead has a
separate call that gets us the additional information beyond posix. Without
being able to do that within the VFS stat calls, that support would have to be
scattered around the main smbd code.
It will very likely break all the onefs modules, but I think the changes will
be reasonably easy to do.
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Why?? :-)
Another one of the little micro-optimizations that I just came across: If you
allocate a variable in a sub-block like the "fstring sharename" in
write_file(), gcc even with -O3 will allocate this variable unconditionally on
the stack at the beginning of the routine. So with eliminating this fstring we
cut 256 bytes of stack in a very hot code path writing to a file. It might make
us a bit more cache-friendly.
This would probably not be worth a second look if it involved larger code
changes, but this one was just too simple to let it pass :-)
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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.
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The goal is to move all this variables into a big context structure.
metze
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metze
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Jeremy.
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Jeremy.
(This used to be commit 9d55ca85ffc73e3fa5fb9895fbcb1ee22f4e320d)
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- only the first non truncating write causes
the write time update with 2 seconds delay.
It's not enough to check for an existing update event
as it will be NULL after the event was triggered.
- SMBwrite truncates always update the write time
unless the sticky write time is set.
- SMBwrite truncates don't trigger a write time update on close.
metze
(This used to be commit 3d17089b6dc773303c8c553f3f6140e60e348fb7)
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Ok, here's the fix for the write times breakage
with the new tests in S4 smbtorture.
The key is keeping in the share mode struct
the "old_file_time" as the real write time,
set by all the write and allocation calls,
and the "changed_write_time" as the "sticky"
write time - set by the SET_FILE_TIME calls.
We can set them independently (although I
kept the optimization of not setting the
"old_file_time" is a "changed_write_time"
was already set, as we'll never see it.
This allows us to update the write time
immediately on the SMBwrite truncate case,
SET_END_OF_FILE and SET_ALLOCATION_SIZE calls,
whilst still have the 2 second delay on the
"normal" SMBwrite, SMBwriteX calls.
I think in a subsequent patch I'd like to
change the name of these from "old_file_time"
to "write_time" and "changed_write_time" to
"sticky_write_time" to make this clearer.
I think I also fixed a bug in Metze's original
code in that once a write timestamp had been
set from a "normal" SMBwriteX call the fsp->update_write_time_triggered
variable was set and then never reset - thus
meaning the write timestamp would never get
updated again on subsequent SMBwriteX's.
The new code checks the update_write_time_event
event instead, and doesn't update is there's
an event already scheduled.
Metze especially, please check this over for
your understanding.
Jeremy.
(This used to be commit 6f20585419046c4aca1f7d6c863cf79eb6ae53b0)
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metze
(This used to be commit df8c100c2b53575a0d425a2daf52e2d59904746a)
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We now never call file_ntimes() directly, every update
is done via smb_set_file_time().
This let samba3 pass the BASE-DELAYWRITE test.
The write time is only updated 2 seconds after the
first write() on any open handle to the current time
(not the time of the first write).
Each handle which had write requests updates the write
time to the current time on close().
If the write time is set explicit via setfileinfo or setpathinfo
the write time is visible directly and a following close
on the same handle doesn't update the write time.
metze
(This used to be commit 2eab212ea2e1bfd8fa716c2c89b2c042f7ba12ea)
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Michael
(This used to be commit 2ad66050a0452b8e7e08b1e7a01efa00c72fd451)
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Michael
(This used to be commit 0b86c420be94d295f6917a220b5d699f65b46711)
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Michael
(This used to be commit 8f83c9a7b245dbfef28195f9a7f33047a8ba95a0)
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Michael
(This used to be commit 73e28806ce87d829ea7c38ed3440020845bb13bf)
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message accordingly. Apart from not supporting create time we
now pass the S4 RAW-NOTIFY torture.
Jeremy.
(This used to be commit 8a77f520fa03afa60eac2aaeab4babe7dd8db4f0)
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False instead of NULL. Fix more of the notifications to
be correct for Samba4 RAW-NOTIFY torture (we had missed
one when calling set_ea_dos_attribute().
Jeremy.
(This used to be commit 39d265375cf55eedddef2c4faa65398df73d5ed2)
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to zero). If non-zero, writeX calls greater than this
value will be left in the socket buffer for later handling
with recvfile (or userspace equivalent). Definition of
recvfile for your system is left as an exercise for
the reader (I'm working on getting splice working :-).
Jeremy.
(This used to be commit 11c03b75ddbcb6e36b231bb40a1773d1c550621c)
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bugs in various places whilst doing this (places that assumed
BOOL == int). I also need to fix the Samba4 pidl generation
(next checkin).
Jeremy.
(This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
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Panisset <panisset@A52.com>.
Awaiting confirmation from reporter.
Jeremy.
(This used to be commit 7bd65060bd965bd17a5d79639cf561b8b578cb36)
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(This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
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Jeremy.
(This used to be commit 407e6e695b8366369b7c76af1ff76869b45347b3)
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(This used to be commit 0c3016d32b5277b901788b13aa7d3f4b647728f2)
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on failure in the write path.
Jeremy.
(This used to be commit cd3f7dbee809fb40194af0e7509142166e02b252)
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for utimes - change the call to ntimes. This preserves
nsec timestamps we get from stat (if the system supports
it) and only maps back down to usec or sec resolution
on time set. Looks bigger than it is as I had to move
lots of internal code from using time_t and struct utimebuf
to struct timespec.
Jeremy.
(This used to be commit 8f3d530c5a748ea90f42ed8fbe68ae92178d4875)
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sure we return -1.
Jeremy.
(This used to be commit 89b83237b03066785ca4bf3b9d120519bddeffad)
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(This used to be commit cc680bbe22b8bfc5a1900f11c2cbaeca3a9f9922)
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tests on this as it's very late NY time (just wanted to get this work
into the tree). I'll test this over the weekend....
Jerry - in looking at the difference between the two trees there
seem to be some printing/ntprinting.c and registry changes we might
want to examine to try keep in sync.
Jeremy.
(This used to be commit c7fe18761e2c753afbffd3a78abff46472a9b8eb)
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safe for using our headers and linking with C++ modules. Stops us
from using C++ reserved keywords in our code.
Jeremy
(This used to be commit 9506b8e145982b1160a2f0aee5c9b7a54980940a)
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Jeremy.
(This used to be commit 27d43f6d36b3f6abc368ec6a00ef9803cb27c324)
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where large print jobs can have out-of-order offsets. Bug found
by Arcady Chernyak <Arcady.Chernyak@efi.com>
Jeremy.
(This used to be commit 482f7e0e3706098b71aa0b31a134994acb1e9fcf)
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fill when a file is extended. Should catch disk full errors on write
from MS-Office.
Jeremy.
(This used to be commit 858824f37be443320487a8e28ec8fa172cdf5a18)
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from Ingo Kilian <ikilian@web.de>.
You must do a make clean after updating this.
Jeremy.
(This used to be commit 3b2cd19fcb8ce38578b122fd6ae722b73081dcda)
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This may fix bug #2382.
Jeremy.
(This used to be commit a27c351e6beafc6609790a9bb9a3d0a1331e8f35)
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