23 Oct, 2020
1 commit
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This will make it easier in the future, but also will allow us to
shrink connect.c which is getting too big, and harder to readSigned-off-by: Ronnie Sahlberg
Signed-off-by: Steve French
Reviewed-by: Aurelien Aptel
17 Sep, 2019
1 commit
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Introduce a new CONFIG_CIFS_ROOT option to handle root file systems
over a SMB share.In order to mount the root file system during the init process, make
cifs.ko perform non-blocking socket operations while mounting and
accessing it.Cc: Steve French
Reviewed-by: Aurelien Aptel
Signed-off-by: Paulo Alcantara (SUSE)
Signed-off-by: Steve French
08 Jul, 2019
1 commit
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SMB3 ACL support is needed for many use cases now and should not be
ifdeffed out, even for SMB1 (CIFS). Remove the CONFIG_CIFS_ACL
ifdef so ACL support is always built into cifs.koSigned-off-by: Steve French
29 Dec, 2018
1 commit
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* Add new dfs_cache.[ch] files
* Add new /proc/fs/cifs/dfscache file
- dump current cache when read
- clear current cache when writing "0" to it* Add delayed_work to periodically refresh cache entries
The new interface will be used for caching DFS referrals, as well as
supporting client target failover.The DFS cache is a hashtable that maps UNC paths to cache entries.
A cache entry contains:
- the UNC path it is mapped on
- how much the the UNC path the entry consumes
- flags
- a Time-To-Live after which the entry expires
- a list of possible targets (linked lists of UNC paths)
- a "hint target" pointing the last known working target or the first
target if none were tried. This hint lets cifs.ko remember and try
working targets first.* Looking for an entry in the cache is done with dfs_cache_find()
- if no valid entries are found, a DFS query is made, stored in the
cache and returned
- the full target list can be copied and returned to avoid race
conditions and looped on with the help with the
dfs_cache_tgt_iterator* Updating the target hint to the next target is done with
dfs_cache_update_tgthint()These functions have a dfs_cache_noreq_XXX() version that doesn't
fetches referrals if no entries are found. These versions don't
require the tcp/ses/tcon/cifs_sb parameters as a result.Expired entries cannot be used and since they have a pretty short TTL
[1] in order for them to be useful for failover the DFS cache adds a
delayed work called periodically to keep them fresh.Since we might not have available connections to issue the referral
request when refreshing we need to store volume_info structs with
credentials and other needed info to be able to connect to the right
server.1: Windows defaults: 5mn for domain-based referrals, 30mn for regular
linksSigned-off-by: Paulo Alcantara
Signed-off-by: Aurelien Aptel
Signed-off-by: Steve French
28 May, 2018
1 commit
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Although dmesg logs and wireshark network traces can be
helpful, being able to dynamically enable/disable tracepoints
(in this case via the kernel ftrace mechanism) can also be
helpful in more quickly debugging problems, and more
selectively tracing the events related to the bug report.This patch adds 12 ftrace tracepoints to cifs.ko for SMB3 events
in some obvious locations. Subsequent patches will add more
as needed.Example use:
trace-cmd record -e cifs
trace-cmd showVarious trace events can be filtered. See:
trace-cmd list | grep cifs
for the current list of cifs tracepoints.Sample output (from mount and writing to a file):
root@smf:/sys/kernel/debug/tracing/events/cifs# trace-cmd show
mount.cifs-6633 [006] .... 7246.936461: smb3_cmd_done: pid=6633 tid=0x0 sid=0x0 cmd=0 mid=0
mount.cifs-6633 [006] .... 7246.936701: smb3_cmd_err: pid=6633 tid=0x0 sid=0x3d9cf8e5 cmd=1 mid=1 status=0xc0000016 rc=-5
mount.cifs-6633 [006] .... 7246.943055: smb3_cmd_done: pid=6633 tid=0x0 sid=0x3d9cf8e5 cmd=1 mid=2
mount.cifs-6633 [006] .... 7246.943298: smb3_cmd_done: pid=6633 tid=0xf9447636 sid=0x3d9cf8e5 cmd=3 mid=3
mount.cifs-6633 [006] .... 7246.943446: smb3_cmd_done: pid=6633 tid=0xf9447636 sid=0x3d9cf8e5 cmd=11 mid=4
mount.cifs-6633 [006] .... 7246.943659: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=3 mid=5
mount.cifs-6633 [006] .... 7246.943766: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=11 mid=6
mount.cifs-6633 [006] .... 7246.943937: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=5 mid=7
mount.cifs-6633 [006] .... 7246.944020: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=16 mid=8
mount.cifs-6633 [006] .... 7246.944091: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=16 mid=9
mount.cifs-6633 [006] .... 7246.944163: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=16 mid=10
mount.cifs-6633 [006] .... 7246.944218: smb3_cmd_err: pid=6633 tid=0xf9447636 sid=0x3d9cf8e5 cmd=11 mid=11 status=0xc0000225 rc=-2
mount.cifs-6633 [006] .... 7246.944219: smb3_fsctl_err: xid=0 fid=0xffffffffffffffff tid=0xf9447636 sid=0x3d9cf8e5 class=0 type=393620 rc=-2
mount.cifs-6633 [007] .... 7246.944353: smb3_cmd_done: pid=6633 tid=0xe1b781a sid=0x3d9cf8e5 cmd=16 mid=12
bash-2071 [000] .... 7256.903844: smb3_cmd_done: pid=2071 tid=0xe1b781a sid=0x3d9cf8e5 cmd=5 mid=13
bash-2071 [000] .... 7256.904172: smb3_cmd_done: pid=2071 tid=0xe1b781a sid=0x3d9cf8e5 cmd=16 mid=14
bash-2071 [000] .... 7256.904471: smb3_cmd_done: pid=2071 tid=0xe1b781a sid=0x3d9cf8e5 cmd=17 mid=15
bash-2071 [000] .... 7256.904950: smb3_cmd_done: pid=2071 tid=0xe1b781a sid=0x3d9cf8e5 cmd=5 mid=16
bash-2071 [000] .... 7256.905305: smb3_cmd_done: pid=2071 tid=0xe1b781a sid=0x3d9cf8e5 cmd=17 mid=17
bash-2071 [000] .... 7256.905688: smb3_cmd_done: pid=2071 tid=0xe1b781a sid=0x3d9cf8e5 cmd=6 mid=18
bash-2071 [000] .... 7256.905809: smb3_write_done: xid=0 fid=0xd628f511 tid=0xe1b781a sid=0x3d9cf8e5 offset=0x0 len=0x1bSigned-off-by: Steve French
Acked-by: Ronnie Sahlberg
25 Jan, 2018
1 commit
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Add code to implement the core functions to establish a SMB Direct connection.
1. Establish an RDMA connection to SMB server.
2. Negotiate and setup SMB Direct protocol.
3. Implement idle connection timer and credit management.SMB Direct is enabled by setting CONFIG_CIFS_SMB_DIRECT.
Add to Makefile to enable building SMB Direct.
Signed-off-by: Long Li
Signed-off-by: Steve French
Reviewed-by: Pavel Shilovsky
02 Nov, 2017
1 commit
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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
09 Jul, 2017
1 commit
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Remove the CONFIG_CIFS_SMB2 ifdef and Kconfig option since they
must always be on now.For various security reasons, SMB3 and later are STRONGLY preferred
over CIFS and older dialects, and SMB3 (and later) will now be
the default dialects so we do not want to allow them to be
ifdeffed out.In the longer term, we may be able to make older CIFS support
disableable in Kconfig with a new set of #ifdef, but we always
want SMB3 and later support enabled.Signed-off-by: Steven French
Reviewed-by: Pavel Shilovsky
24 Apr, 2016
1 commit
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Use xattr handlers for resolving attribute names. The amount of setup
code required on cifs is nontrivial, so use the same get and set
functions for all handlers, with switch statements for the different
types of attributes in them.The set_EA handler can handle NULL values, so we don't need a separate
removexattr function anymore. Remove the cifs_dbg statements related to
xattr name resolution; they don't add much. Don't build xattr.o when
CONFIG_CIFS_XATTR is not defined.Signed-off-by: Andreas Gruenbacher
Signed-off-by: Al Viro
09 Sep, 2013
1 commit
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The existing NLS case conversion routines do not appropriately handle
the (now common) case where the local host is using UTF8. This is
because nls_utf8 has no support at all for converting a utf8 string
between cases and the NLS infrastructure in general cannot handle
a multibyte input character.In any case, what we really need for cifs is to emulate how we expect
the server to convert the character to upper or lowercase. Thus, even
if we had routines that could handle utf8 case conversion, we likely
would end up with the wrong result if the name ends up being in the
upper planes.This patch adds a new scheme for doing unicode case conversion. The
case conversion tables that Microsoft has published for Windows 8
have been converted to a set of lookup tables, and a routine is
added to convert a wchar_t from lower to uppercase using those
tables.Reported-and-Tested-by: Jan-Marek Glogowski
Signed-off-by: Jeff Layton
Signed-off-by: Steve French
25 Sep, 2012
1 commit
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Signed-off-by: Pavel Shilovsky
Signed-off-by: Steve French
25 Jul, 2012
3 commits
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Signed-off-by: Pavel Shilovsky
Signed-off-by: Steve French -
and add negotiate request type to let set_credits know that
we are only on negotiate stage and no need to make a decision
about disabling echos and oplocks.Signed-off-by: Pavel Shilovsky
Signed-off-by: Steve French -
Now we can process SMB2 messages: check message, get message id
and wakeup awaiting routines.Signed-off-by: Pavel Shilovsky
Signed-off-by: Steve French
24 Jul, 2012
2 commits
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Reviewed-by: Jeff Layton
Signed-off-by: Pavel Shilovsky
Signed-off-by: Steve French -
Add mapping table for 32 bit SMB2 status codes to linux errors.
Note that SMB2 does not use DOS/OS2 errors (ever) so mapping to
DOS/OS2 errors as a common network subset (as we do for cifs)
doesn't help. And note that the set of status codes is much more
complete here.Signed-off-by: Steve French
Signed-off-by: Pavel Shilovsky
Signed-off-by: Steve French
23 May, 2012
1 commit
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As with Linux nfs client, which uses "nfsvers=" or "vers=" to
indicate which protocol to use for mount, specifying"vers=2.1"
will force an SMB2 mount. When vers is not specified CIFS is used
"vers=1"
We can eventually autonegotiate down from SMB2 to CIFS
when SMB2 is stable enough to make it the default, but this
is for the future. At that time we could also implement a
"maxprotocol" mount option as smbclient and Samba have today,
but that would be premature until SMB2 is stable.Intially the SMB2 Kconfig option will depend on "BROKEN"
until the merge is complete, and then be "EXPERIMENTAL"
When it is no longer experimental we can consider changing
the default protocol to attempt first.Signed-off-by: Pavel Shilovsky
Signed-off-by: Jeff Layton
Acked-by: Shirish Pargaonkar
Signed-off-by: Steve French
17 May, 2012
1 commit
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We need a way to dispatch different operations for different versions.
Behold the smb_version_operations/values structures. For now, those
structures just hold the version enum value and nothing uses them.
Eventually, we'll expand them to cover other operations/values as we
change the callers to dispatch from here.Signed-off-by: Jeff Layton
Signed-off-by: Pavel Shilovsky
19 May, 2011
1 commit
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local cifs functions (repost)
Using kernel crypto APIs for DES encryption during LM and NT hash generation
instead of local functions within cifs.
Source file smbdes.c is deleted sans four functions, one of which
uses ecb des functionality provided by kernel crypto APIs.Remove function SMBOWFencrypt.
Add return codes to various functions such as calc_lanman_hash,
SMBencrypt, and SMBNTencrypt. Includes fix noticed by Dan Carpenter.Signed-off-by: Shirish Pargaonkar
CC: Dan Carpenter
Acked-by: Jeff Layton
Signed-off-by: Steve French
28 Jan, 2011
1 commit
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Replaced md4 hashing function local to cifs module with kernel crypto APIs.
As a result, md4 hashing function and its supporting functions in
file md4.c are not needed anymore.Cleaned up function declarations, removed forward function declarations,
and removed a header file that is being deleted from being included.Verified that sec=ntlm/i, sec=ntlmv2/i, and sec=ntlmssp/i work correctly.
Signed-off-by: Shirish Pargaonkar
Reviewed-by: Jeff Layton
Signed-off-by: Steve French
26 Jan, 2011
1 commit
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Replace remaining use of md5 hash functions local to cifs module
with kernel crypto APIs.
Remove header and source file containing those local functions.Signed-off-by: Shirish Pargaonkar
Reviewed-by: Jeff Layton
Signed-off-by: Steve French
07 Dec, 2010
1 commit
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Some of the code under CONFIG_CIFS_ACL is dependent upon code under
CONFIG_CIFS_EXPERIMENTAL, but the Kconfig options don't reflect that
dependency. Move more of the ACL code out from under
CONFIG_CIFS_EXPERIMENTAL and under CONFIG_CIFS_ACL.Also move find_readable_file out from other any sort of Kconfig
option and make it a function normally compiled in.Reported-and-Acked-by: Randy Dunlap
Signed-off-by: Jeff Layton
Signed-off-by: Steve French
02 Aug, 2010
2 commits
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Define server-level cache index objects (as managed by TCP_ServerInfo structs)
and register then with FS-Cache. Each server object is created in the CIFS
top-level index object and is itself an index into which superblock-level
objects are inserted.The server objects are now keyed by {IPaddress,family,port} tuple.
Signed-off-by: Suresh Jayaraman
Signed-off-by: Steve French -
Define CIFS for FS-Cache and register for caching. Upon registration the
top-level index object cookie will be stuck to the netfs definition by
FS-Cache.Signed-off-by: Suresh Jayaraman
Signed-off-by: Steve French
01 Jan, 2009
1 commit
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Remove the hopelessly misguided ->dir_notify(). The only instance (cifs)
has been broken by design from the very beginning; the objects it creates
are never destroyed, keep references to struct file they can outlive, nothing
that could possibly evict them exists on close(2) path *and* no locking
whatsoever is done to prevent races with close(), should the previous, er,
deficiencies someday be dealt with.Signed-off-by: Al Viro
25 Jan, 2008
1 commit
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Signed-off-by: Igor Mammedov
Signed-off-by: Steve French
10 Jan, 2008
1 commit
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Adds additional option CIFS_DFS_UPCALL to fs/Kconfig for enabling
DFS support. Resolved IP address is saved as a string in the
key payload.Igor has a series of related patches that will follow which finish up
CIFS DFS supportAcked-by: Igor Mammedov
Signed-off-by: Steve French
03 Nov, 2007
1 commit
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Add routines to handle upcalls to userspace via keyctl for the purpose
of getting a SPNEGO blob for a particular uid and server combination.Clean up the Makefile a bit and set it up to only compile cifs_spnego
if CONFIG_CIFS_UPCALL is set. Also change CONFIG_CIFS_UPCALL to depend
on CONFIG_KEYS rather than CONFIG_CONNECTOR.cifs_spnego.h defines the communications between kernel and userspace
and is intended to be shared with userspace programs.Signed-off-by: Jeff Layton
Signed-off-by: Steve French
26 Sep, 2007
1 commit
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Signed-off-by: Steve French
27 Feb, 2007
1 commit
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For nfsd to work over cifs mounts (which presumably makes sense when trying
to reexport mounts to windows, network appliances or Samba servers to nfs
clients via nfs server).This is the first stage of that enablement, marked experimental and turned
off by default.Signed-off-by: Steve French
01 Jun, 2006
1 commit
14 Feb, 2006
1 commit
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The cifs session setup code has three cases, and a fourth for backlevel
LANMAN2 style session setup needed to be added. This new session setup
implmentation will eventually replace the other three and should be
easier to read while fixing a few minor problems (not setting
the LARGE READ/WRITEX flags when NTLMSSP was negotiated for example) and
adding support for NTLMv2 (which will be added with the next patch. In the
meantime, this code is marked in an CONFIG_CIFS_EXPERIMENTAL block and will
not be turned on by default until it is tested against more server types.Signed-off-by: Steve French
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
