BMC/Intel-BMC/linux.git/fs/cifs/ioctl.c, branch dev

Add ioctl to set integrity

2015-06-29T02:15:45+00:00

set integrity increases reliability of files stored on SMB3 servers. Add ioctl to allow setting this on files on SMB3 and later mounts. Signed-off-by: Steve French

Add reflink copy over SMB3.11 with new FSCTL_DUPLICATE_EXTENTS

2015-06-29T02:15:38+00:00

Getting fantastic copy performance with cp --reflink over SMB3.11 using the new FSCTL_DUPLICATE_EXTENTS. This FSCTL was added in the SMB3.11 dialect (testing was against REFS file system) so have put it as a 3.11 protocol specific operation ("vers=3.1.1" on the mount). Tested at the SMB3 plugfest in Redmond. It depends on the new FS Attribute (BLOCK_REFCOUNTING) which is used to advertise support for the ability to do this ioctl (if you can support multiple files pointing to the same block than this refcounting ability or equivalent is needed to support the new reflink-like duplicate extent SMB3 ioctl. Signed-off-by: Steve French

fix deadlock in cifs_ioctl_clone()

2015-01-19T04:49:26+00:00

It really needs to check that src is non-directory *and* use {un,}lock_two_nodirectories(). As it is, it's trivial to cause double-lock (ioctl(fd, CIFS_IOC_COPYCHUNK_FILE, fd)) and if the last argument is an fd of directory, we are asking for trouble by violating the locking order - all directories go before all non-directories. If the last argument is an fd of parent directory, it has 50% odds of locking child before parent, which will cause AB-BA deadlock if we race with unlink(). Cc: stable@vger.kernel.org @ 3.13+ Signed-off-by: Al Viro

fs: cifs: new helper: file_inode(file)

2014-05-21T17:18:05+00:00

Signed-off-by: Libo Chen Acked-by: Jeff Layton Signed-off-by: Steve French

[CIFS] Do not use btrfs refcopy ioctl for SMB2 copy offload

2013-11-25T15:50:31+00:00

Change cifs.ko to using CIFS_IOCTL_COPYCHUNK instead of BTRFS_IOC_CLONE to avoid confusion about whether copy-on-write is required or optional for this operation. SMB2/SMB3 copyoffload had used the BTRFS_IOC_CLONE ioctl since they both speed up copy by offloading the copy rather than passing many read and write requests back and forth and both have identical syntax (passing file handles), but for SMB2/SMB3 CopyChunk the server is not required to use copy-on-write to make a copy of the file (although some do), and Christoph has commented that since CopyChunk does not require copy-on-write we should not reuse BTRFS_IOC_CLONE. This patch renames the ioctl to use a cifs specific IOCTL CIFS_IOCTL_COPYCHUNK. This ioctl is particularly important for SMB2/SMB3 since large file copy over the network otherwise can be very slow, and with this is often more than 100 times faster putting less load on server and client. Note that if a copy syscall is ever introduced, depending on its requirements/format it could end up using one of the other three methods that CIFS/SMB2/SMB3 can do for copy offload, but this method is particularly useful for file copy and broadly supported (not just by Samba server). Signed-off-by: Steve French Reviewed-by: Jeff Layton Reviewed-by: David Disseldorp

CIFS: SMB2/SMB3 Copy offload support (refcopy) phase 1

2013-11-14T06:05:36+00:00

This first patch adds the ability for us to do a server side copy (ie fast copy offloaded to the server to perform, aka refcopy) "cp --reflink" of one file to another located on the same server. This is much faster than traditional copy (which requires reading and writing over the network and extra memcpys). This first version is not going to be copy files larger than about 1MB (to Samba) until I add support for multiple chunks and for autoconfiguring the chunksize. It includes: 1) processing of the ioctl 2) marshalling and sending the SMB2/SMB3 fsctl over the network 3) simple parsing of the response It does not include yet (these will be in followon patches to come soon): 1) support for multiple chunks 2) support for autoconfiguring and remembering the chunksize 3) Support for the older style copychunk which Samba 4.1 server supports (because this requires write permission on the target file, which cp does not give you, apparently per-posix). This may require a distinct tool (other than cp) and other ioctl to implement. Reviewed-by: Pavel Shilovsky Signed-off-by: Steve French

Fix unused variable warning when CIFS POSIX disabled

2013-11-02T17:52:48+00:00

Fix unused variable warning when CONFIG_CIFS_POSIX disabled. fs/cifs/ioctl.c: In function 'cifs_ioctl': >> fs/cifs/ioctl.c:40:8: warning: unused variable 'ExtAttrMask' [-Wunused-variable] __u64 ExtAttrMask = 0; ^ Pointed out by 0-DAY kernel build testing backend Signed-off-by: Steve French

Allow setting per-file compression via SMB2/3

2013-10-28T14:22:31+00:00

Allow cifs/smb2/smb3 to return whether or not a file is compressed via lsattr, and allow SMB2/SMB3 to set the per-file compression flag ("chattr +c filename" on an smb3 mount). Windows users often set the compressed flag (it can be done from the desktop and file manager). David Disseldorp has patches to Samba server to support this (at least on btrfs) which are complementary to this Signed-off-by: Steve French

[CIFS] cifs: Rename cERROR and cFYI to cifs_dbg

2013-05-05T03:17:23+00:00

It's not obvious from reading the macro names that these macros are for debugging. Convert the names to a single more typical kernel style cifs_dbg macro. cERROR(1, ...) -> cifs_dbg(VFS, ...) cFYI(1, ...) -> cifs_dbg(FYI, ...) cFYI(DBG2, ...) -> cifs_dbg(NOISY, ...) Move the terminating format newline from the macro to the call site. Add CONFIG_CIFS_DEBUG function cifs_vfs_err to emit the "CIFS VFS: " prefix for VFS messages. Size is reduced ~ 1% when CONFIG_CIFS_DEBUG is set (default y) $ size fs/cifs/cifs.ko* text data bss dec hex filename 265245 2525 132 267902 4167e fs/cifs/cifs.ko.new 268359 2525 132 271016 422a8 fs/cifs/cifs.ko.old Other miscellaneous changes around these conversions: o Miscellaneous typo fixes o Add terminating \n's to almost all formats and remove them from the macros to be more kernel style like. A few formats previously had defective \n's o Remove unnecessary OOM messages as kmalloc() calls dump_stack o Coalesce formats to make grep easier, added missing spaces when coalescing formats o Use %s, __func__ instead of embedded function name o Removed unnecessary "cifs: " prefixes o Convert kzalloc with multiply to kcalloc o Remove unused cifswarn macro Signed-off-by: Joe Perches Signed-off-by: Jeff Layton Signed-off-by: Steve French

new helper: file_inode(file)

2013-02-23T04:31:31+00:00

Signed-off-by: Al Viro