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The kernel is globally removing the ambiguous 0-length and 1-element
arrays in favor of flexible arrays, so that we can gain both compile-time
and run-time array bounds checking[1].
Replace the trailing 1-element array with a flexible array in the
following structures:
struct cifs_spnego_msg
struct cifs_quota_data
struct get_dfs_referral_rsp
struct file_alt_name_info
NEGOTIATE_RSP
SESSION_SETUP_ANDX
TCONX_REQ
TCONX_RSP
TCONX_RSP_EXT
ECHO_REQ
ECHO_RSP
OPEN_REQ
OPENX_REQ
LOCK_REQ
RENAME_REQ
COPY_REQ
COPY_RSP
NT_RENAME_REQ
DELETE_FILE_REQ
DELETE_DIRECTORY_REQ
CREATE_DIRECTORY_REQ
QUERY_INFORMATION_REQ
SETATTR_REQ
TRANSACT_IOCTL_REQ
TRANSACT_CHANGE_NOTIFY_REQ
TRANSACTION2_QPI_REQ
TRANSACTION2_SPI_REQ
TRANSACTION2_FFIRST_REQ
TRANSACTION2_GET_DFS_REFER_REQ
FILE_UNIX_LINK_INFO
FILE_DIRECTORY_INFO
FILE_FULL_DIRECTORY_INFO
SEARCH_ID_FULL_DIR_INFO
FILE_BOTH_DIRECTORY_INFO
FIND_FILE_STANDARD_INFO
Replace the trailing 1-element array with a flexible array, but leave
the existing structure padding:
FILE_ALL_INFO
FILE_UNIX_INFO
Remove unused structures:
struct gea
struct gealist
Adjust all related size calculations to match the changes to sizeof().
No machine code output differences are produced after these changes.
[1] For lots of details, see both:
https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrayshttps://people.kernel.org/kees/bounded-flexible-arrays-in-c
Cc: Steve French <sfrench@samba.org>
Cc: Paulo Alcantara <pc@cjr.nz>
Cc: Ronnie Sahlberg <lsahlber@redhat.com>
Cc: Shyam Prasad N <sprasad@microsoft.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
We use the concept of "binding" when one of the secondary channel
is in the process of connecting/reconnecting to the server. Till this
binding process completes, and the channel is bound to an existing session,
we redirect traffic from other established channels on the binding channel,
effectively blocking all traffic till individual channels get reconnected.
With my last set of commits, we can get rid of this binding serialization.
We now have a bitmap of connection states for each channel. We will use
this bitmap instead for tracking channel status.
Having a bitmap also now enables us to keep the session alive, as long
as even a single channel underneath is alive.
Unfortunately, this also meant that we need to supply the tcp connection
info for the channel during all negotiate and session setup functions.
These changes have resulted in a slightly bigger code churn.
However, I expect perf and robustness improvements in the mchan scenario
after this change.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
checkpatch complains about source files with filenames (e.g. in
these cases just below the SPDX header in comments at the top of
various files in fs/cifs). It also is helpful to change this now
so will be less confusing when the parent directory is renamed
e.g. from fs/cifs to fs/smb_client (or fs/smbfs)
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Add SPDX license identifier and replace license boilerplate.
Corrects various checkpatch errors with the older format for
noting the LGPL license.
Signed-off-by: Steve French <stfrench@microsoft.com>
Currently, we don't check the version in the SPNEGO upcall response
even though one is provided. Jeff and Q have made the corresponding
change to the Samba client (cifs.upcall).
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
