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Often times before creating a file, a client will first query to see
if it already exists. Since some systems have a case-insensitive stat
that is called from unix_convert, we can definitively return
STATUS_NO_SUCH_FILE to the client without scanning the whole
directory.
This code path is taken from trans2querypathinfo, but trans2findfirst
still does a full directory scan even though the get_real_filename
(the case-insensitive stat vfs call) can prevent this.
This patch adds the get_real_filename call to the trans2find* path,
and also changes the vfs_default behavior for
SMB_VFS_GET_REAL_FILENAME. Previously, in the absence of a
get_real_filename implementation, we would fallback to the full
directory scan. The default behavior now returns -1 and sets errno to
EOPNOTSUPP. This allows SMB_VFS_GET_REALFILENAME to be called from
trans2* and unix_convert.
* 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
Reported by Kukks. Make sure we correctly use LSTAT in all cases where
POSIX pathnames are being used. This matters when dealing with symlinks
pointing to invalid paths being renamed or deleted not all deletes and
renames are done via an nt_create open.
Jeremy.
This is done to help file systems that can tell us about the real upper/lower
case combination given a case-insensitive file name. The sample I will soon
push is the gpfs module (recent gpfs has a get_real_filename function), others
might have a similar function to help alleviate the 1million files in a single
directory problem.
Jeremy, please comment!
Thanks,
Volker
With
case sensitive = yes
preserve case = no
short preserve case = no
default case = upper
a "dir FOO.txt" would not find "FOO.TXT" because FOO.txt ends up unconverted in
the mask for mask_match.
Jeremy, please check!
Volker
map_nt_error_from_unix() now assumes that it is called in
an error path and returns an error even for a given errno == 0.
The original behaviour of unix_convert() used the mapping
of errno == 0 ==> NT_STATUS_OK to return success through
an error path.
I think this must have been an oversight, and unix_convert() worked
only by coincidence (or because explicitly using the knowledge
of the conceptually wrong working of map_nt_error_from_unix().
This patch puts this straight by not interpreting errno == 0
as an error condition and proceeding in that case.
Jeremy - please check!
Michael
(This used to be commit ec5956ab0df1b3f567470b2481b73da9c3c67371)
new stream code. (1) In smbd/filename, don't split the name at
':' if we know it's a posix path (this should be parameterized....).
(2). When calling posix_mkdir, we get the flag FILE_FLAG_POSIX_SEMANTICS
passed to open_directory(). I know for a posix client lp_posix_pathnames
should be true (which is checked for in is_ntfs_stream_name() but we
have an explicit flag here, so let's use it.
Jeremy.
(This used to be commit 7bb7a0def6518784befa75e5303289d2b4d36dd4)
This is the core of the streams support. The main change is that in
files_struct there is now a base_fsp pointer that holds the main file open
while a stream is open. This is necessary to get the rather strange delete
semantics right: You can't delete the main file while a stream is open without
FILE_SHARE_DELETE, and while a stream is open a successful unlink of the main
file leads to DELETE_PENDING for all further access on the main file or any
stream.
(This used to be commit 6022873cc155bdbbd3fb620689715f07a24d6ed1)
If we know the underlying filesystem is case-insensitive, then we
know that it won't help to search for case variations of the requested
name.
Jeremy, please review (and revert if you disagree).
(This used to be commit 9e8b8f8c16612d8a08b55802f4fd9afca5498a7c)
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)
new name if unmangling succeeded, not if it
failed. Jerry - please re-test, this should
fix your bug.
Jeremy.
(This used to be commit c215d6e84929b70e4472e19f32ec4f1db7449d90)
There are now ony 17 pstrings left in reply.c,
and these will be easy to remove (and I'll be
doing that shortly). Had to fix an interesting
bug in pull_ucs2_base_talloc() when a source
string is not null terminated :-).
Jeremy.
(This used to be commit 0c9a8c4dff10974dbffd2a302ae982896122fcc0)
interface. More development will come on top of this. Remove the
"mangled map" parameter.
Jeremy.
(This used to be commit dee8beba7a92b8a3f68bbcc59fd0a827f68c7736)
This API will change anyway when moving away from pstrings.
It took so long to fix, because that rename bug I just fixed gave make
test failures that had nothing to do with this one.
I have samba4 tests for both bugs, will check them in when the build
farm has caught up
(This used to be commit d4f442ed9b145990af4db26859663954ddd70926)
The function name reduce_name is misleading, making the user believe it
changes an argument.
(This used to be commit 68234f0bc6fb4d6d99ae94ff067db118c60804aa)
This replaces the internal explicit dev/ino file id representation by a
"struct file_id". This is necessary as cluster file systems and NFS
don't necessarily assign the same device number to the shared file
system. With this structure in place we can now easily add different
schemes to map a file to a unique 64-bit device node.
Jeremy, you might note that I did not change the external interface of
smb_share_modes.c.
Volker
(This used to be commit 9b10dbbd5de8813fc15ebbb6be9b18010ffe8139)
watch carefully - so I'm doing it in one transaction so I can
roll back).
Change check_name(), reduce_name() and dptr_create() to
return NTSTATUS. This helps a lot in error path processing
and especially in reduce_name() allows us to ditch the flaky
and error-prone saving of errno and return errors directly.
Jeremy.
(This used to be commit 6133a694aa429d638320e39ffe1c49d172583ccf)
The only difference between the two trees now w.r.t file
serving are the changes to smbd/open.c in this branch I need
to review.
Jeremy.
(This used to be commit f4474edf6a0c71001dbd01429ef70bafad6abd74)
to do the upper layer directories but this is what
everyone is waiting for....
Jeremy.
(This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
"As a special case for directories with large numbers of files, if the
case options are set as follows, "case sensitive = yes", "case
preserve = no", "short preserve case = no" then the "default case"
option will be applied and will modify all filenames sent from the client
when accessing this share."
This is needed as fixing the case preserve rules to only apply to
new filenames broke the large directory fix. Glad we caught this
before release. Thanks to jht for this one.
Jeremy.
(This used to be commit abc21cc7322d695cf77b6fb18f4ecdb16288c19b)
default case applies only to new files and correctly examines 8.3
and long names.
Jeremy.
(This used to be commit ba931a015132f7e8fffa52c617cd8345a1da35d2)
the mangle cache is no good (3 letter extension could be wrong
case - so don't demangle in this case - leave as mangled and
allow the mangling of the directory entry read (which is done
case insensitively) to match instead. This will lead to more
false positive matches but we fail completely without it.
Jeremy.
(This used to be commit 238b35d2e6e21d0e07d500d446f08ec128ea7720)
