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In very hot codepaths like the statcache copy_smb_filename and the subsequent
recursive talloc_free is noticable in the CPU load.
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This is a hot codepath (called from the stat cache)
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This vop is designed to work in tandem with SMB_VFS_READDIR to allow
vfs modules to make modifications to arbitrary filenames before
they're consumed by callers. Subsequently the core directory
enumeration code in smbd is now changed to free the memory that may be
allocated in a module. This vop enables the new version of catia in
the following patch.
Signed-off-by: Tim Prouty <tprouty@samba.org>
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Office 2003.
Confirmation from reporter that this fixes the issue in master on ext3/ext4.
Back-ports to follow.
Jeremy.
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metze
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This patch also changes the unix convert flags to make sure the
correct semantics are preservered for allowing/disallowing wildcards
in the last component of the path.
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caller know if the path has a wildcard
This also eliminates the need for resolve_dfspath().
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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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This is the first of a series of patches that change path based
operations to operate on a struct smb_filename instead of a char *.
This same concept already exists in source4.
My goals for this series of patches are to eventually:
1) Solve the stream vs. posix filename that contains a colon ambiguity
that currently exists.
2) Make unix_convert the only function that parses the stream name.
3) Clean up the unix_convert API.
4) Change all path based vfs operation to take a struct smb_filename.
5) Make is_ntfs_stream_name() a constant operation that can simply
check the state of struct smb_filename rather than re-parse the
filename.
6) Eliminate the need for split_ntfs_stream_name() to exist.
My strategy is to start from the inside at unix_convert() and work my
way out through the vfs layer, call by call. This first patch does
just that, by changing unix_convert and all of its callers to operate
on struct smb_filename. Since this is such a large change, I plan on
pushing the patches in phases, where each phase keeps full
compatibility and passes make test.
The API of unix_convert has been simplified from:
NTSTATUS unix_convert(TALLOC_CTX *ctx,
connection_struct *conn,
const char *orig_path,
bool allow_wcard_last_component,
char **pp_conv_path,
char **pp_saved_last_component,
SMB_STRUCT_STAT *pst)
to:
NTSTATUS unix_convert(TALLOC_CTX *ctx,
connection_struct *conn,
const char *orig_path,
struct smb_filename *smb_fname,
uint32_t ucf_flags)
Currently the smb_filename struct looks like:
struct smb_filename {
char *base_name;
char *stream_name;
char *original_lcomp;
SMB_STRUCT_STAT st;
};
One key point here is the decision to break up the base_name and
stream_name. I have introduced a helper function called
get_full_smb_filename() that takes an smb_filename struct and
allocates the full_name. I changed the callers of unix_convert() to
subsequently call get_full_smb_filename() for the time being, but I
plan to eventually eliminate get_full_smb_filename().
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We need to allow to set filesystem capabilities from the default vfs in
create_conn_struct() in order to find mixed-case filenames. Thanks Volker!
This one was hard to find, so a little longer explanation:
When a Windows client tries to upload e.g. the Xerox 4110 PS driver, the client
first uploads the driver files to the [print$] share. Some of them (in this case
the Windows Postscript drivers) are with uppercase filenames while some of them
(like the PPD file) are in lowercase. After the driver upload the client issues
the spoolss_AddPrinterDriverEx() call with level 6. There the client tries to
add the PPD file with an uppercase filename (while having stored it in lowercase
on the server). The internal spoolss add driver functions then could not find the
appropriate filename while trying to move them to the version subdirectory (in
this case W32X86/3) and fails then entire spoolss_AddPrinterDriverEx() call.
With this fix, the convert_unix_name() name finds the correct file and
the spoolss_AddPrinterDriverEx() succeeds.
Guenther
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* 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
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The goal is to move all this variables into a big context structure.
metze
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srvsvc needs it, as will printing
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multibyte character.
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(This used to be commit e115e2582256c34e6905afc8c2929efd6ea61088)
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(This used to be commit 7db382588ac90fe250b72cf4cd07afb39fcae7c0)
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Jeremy, setting "exists" to True in _dfs_Add prevented the initial creation of
a new symlink for me, because the SMB_VFS_UNLINK failed. This also exists in
3.2. I only check it into 3.3 as I would like you to look at it first.
Thanks,
Volker
(This used to be commit f58b098a4172949018e84c4d0c722d6eb9bba514)
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(This used to be commit d031e6d8cabe2dd0b29e90d173d45843e145176a)
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(This used to be commit 587bd636cb70d09600111ced040adaa55af35d0f)
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(cherry picked from commit 4a996476297963d4cb300b4d45c23e83a493c339)
(This used to be commit 86cae83a7db87063ecd6e58eaa15f11441c45040)
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At least form_junctions() does not initialize refcount, and I don't see it in
get_referred_path(). For the latters, the callers might initialize it. But even
if they did, I think parse_msdfs_symlink() should unconditionally return the
number of referrals it found. I don't think it makes sense to count them up
from somewhere else.
(This used to be commit 73172113484a2c6c9af014f59e84707716c61a7d)
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(This used to be commit 1d7ad0dea7ebf7a46af6e695797e5132264307d6)
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(This used to be commit 344d69f95e217d16213eaa6b53141af6ab459708)
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by name code from conn, we were already doing the
same check in the dfs_redirect() function, so move
it into parse_dfs_path() instead.
Jeremy.
(This used to be commit 8a7c6df122c5e4a1d0f74ab0f1bc9376a0a8bcb1)
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Jeremy.
(This used to be commit 08d168f0e5b8fb07e95a5118a839e0da53e9d363)
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that don't look like \xxx\yyy, cope with arbitrary length.
Jeremy.
(This used to be commit 635035d999fcd8e06b70c8cb1137127c289dc9e6)
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that sets the DFS bit on pathnames but doesn't
send DFS paths. This causes lookups to fail as
the smbd/msdfs.c code now just eats the first
two parts of the pathname and uses the rest as
the local path. The previous hostname check
used to protect us from that as we knew that
when the hostname was invalid it was a local
path (and a broken client).
I didn't want to put that check back in, but
came up with another idea - even though the
hostname can be a different one, the sharename
must be valid on this machine. So we can check
for a valid sharename instead.
Jeremy.
(This used to be commit e1cda82f6f7de3306a653af920756c1640057f2d)
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(This used to be commit 1b1614c3261e1e93a2cad1f1063e28cbbb13f434)
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(This used to be commit 559180f7d30606d1999399d954ceedc798c669a4)
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There is no reason to ensure the target host is ourselves, and
this breaks MS clients in some cases.
Jeremy.
(This used to be commit c19fdf43d16ce9fba3e8e12e6192bac31837715e)
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(This used to be commit fd34ce437057bb34cdc37f4b066e424000d36789)
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Remove all vestiges of pstring (except for smbctool as noted
in previous commit).
Jeremy
(This used to be commit 4c32a22ac50ada3275d2ffba3c1aa08bee7d1549)
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a bunch of #defines). Remove pstring from msdfs.c.
Jeremy.
(This used to be commit e203ba22275320808bc11b17361ad1f2d5b0b897)
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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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We now accept both \\server\tmp and \server\tmp. There are other places
where this might be necessary, but at least the functionality is a bit
easier now.
(This used to be commit 25cc27df97e9eecb470f99ea934de12f2a0f4df9)
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Jeremy, please check!
(This used to be commit d4eddf88d20b09c450d4358d2ef1bc35736501ff)
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(This used to be commit b64df8a3c504ab7749c21ffb26e4771a9a0a328f)
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Jeremy.
(This used to be commit 37cf2c272751065245dd46708af0a78f1f0c47df)
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to unix_convert().
Jeremy.
(This used to be commit 39c211a702e91c34c1a5a689e1b0c4530ea8a1ac)
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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)
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and make valgrindtest. Final step will be to change srvstr_get_path()
to return talloced memory in the major codepaths.
Jeremy.
(This used to be commit cf6b6f9c3a38b68d2671c753f412772344506742)
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interface. More development will come on top of this. Remove the
"mangled map" parameter.
Jeremy.
(This used to be commit dee8beba7a92b8a3f68bbcc59fd0a827f68c7736)
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----------------------------------------------------------
In rare cases, Samba 3.0.25b shows directory contents at the wrong
position in the file tree when displaying a subdirectory of a DFS link.
The problem occurs whenever Windows XP asks for a DFS referral for a
subdirectory of a DFS link with a trailing backslash.
Windows does not do this very often, but we saw it several times per day
on our central DFS server.
smbd/msdfs.c, dfs_path_lookup() does the following with the requested
path:
- in line 390, the local copy 'localpath' is 'unix_convert'ed; the
trailing backslash is removed inside unix_convert
- in lines 417-20, 'dfspath' (another copy of the requested path) is
mangled another way without removing trailing backslashes
That's why the following loop (lines 435-461) that is meant to
synchronously cut off the last path component from both strings until it
comes to a DFS link, does not handle both strings the same. When the
original path ended with a backslash, 'canon_dfspath' has always one
component more than 'localpath', so that *consumedcntp gets too big in
line 446. This value is reported to the client.
----------------------------------------------------------
Bug #4860.
Jeremy.
(This used to be commit 42d1c6713a56197ca8dfebf74eb0d483102148f7)
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Doing a DFS traverse through a deep link could fail (not using
explorer).
Jeremy.
(This used to be commit cd93f0cb00207098014e41e0ba16210cb150b895)
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(This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
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