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path: root/fs/cifs/ioctl.c
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* CIFS: Decrease verbosity of ioctl callPavel Shilovsky2016-12-021-1/+1
| | | | | | | Cc: Stable <stable@vger.kernel.org> # v4.9+ Reviewed-by: Aurelien Aptel <aaptel@suse.com> Acked-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
* Enable previous version supportSteve French2016-10-131-2/+14
| | | | | | | | Add ioctl to query previous versions of file Allows listing snapshots on files on SMB3 mounts. Signed-off-by: Steve French <smfrench@gmail.com>
* vfs: pull btrfs clone API to vfs layerChristoph Hellwig2015-12-071-67/+59
| | | | | | | | | | | | | | | | | | | | | | | | The btrfs clone ioctls are now adopted by other file systems, with NFS and CIFS already having support for them, and XFS being under active development. To avoid growth of various slightly incompatible implementations, add one to the VFS. Note that clones are different from file copies in several ways: - they are atomic vs other writers - they support whole file clones - they support 64-bit legth clones - they do not allow partial success (aka short writes) - clones are expected to be a fast metadata operation Because of that it would be rather cumbersome to try to piggyback them on top of the recent clone_file_range infrastructure. The converse isn't true and the clone_file_range system call could try clone file range as a first attempt to copy, something that further patches will enable. Based on earlier work from Peng Tao. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Allow copy offload (CopyChunk) across sharesSteve French2015-11-091-3/+8
| | | | | | | | | | | | | FSCTL_SRV_COPYCHUNK_WRITE only requires that the source and target be on the same server (not the same volume or same share), so relax the existing check (which required them to be on the same share). Note that this works to Windows (and presumably most other NAS) but Samba requires that the source and target be on the same share. Moving a file across shares is a common use case and can be very heplful (100x faster). Signed-off-by: Steve French <steve.french@primarydata.com> Reviewed-by: David Disseldorp <ddiss@samba.org>
* CIFS: fix type confusion in copy offload ioctlJann Horn2015-09-111-0/+6
| | | | | | | | | | | | | | | | | | This might lead to local privilege escalation (code execution as kernel) for systems where the following conditions are met: - CONFIG_CIFS_SMB2 and CONFIG_CIFS_POSIX are enabled - a cifs filesystem is mounted where: - the mount option "vers" was used and set to a value >=2.0 - the attacker has write access to at least one file on the filesystem To attack this, an attacker would have to guess the target_tcon pointer (but guessing wrong doesn't cause a crash, it just returns an error code) and win a narrow race. CC: Stable <stable@vger.kernel.org> Signed-off-by: Jann Horn <jann@thejh.net> Signed-off-by: Steve French <smfrench@gmail.com>
* Add way to query server fs info for smb3Steve French2015-08-201-6/+42
| | | | | | | | | | | | | | | The server exports information about the share and underlying device under an SMB3 export, including its attributes and capabilities, which is stored by cifs.ko when first connecting to the share. Add ioctl to cifs.ko to allow user space smb3 helper utilities (in cifs-utils) to display this (e.g. via smb3util). This information is also useful for debugging and for resolving configuration errors. Signed-off-by: Steve French <steve.french@primarydata.com>
* Add ioctl to set integritySteve French2015-06-281-0/+11
| | | | | | | 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 <steve.french@primarydata.com>
* Add reflink copy over SMB3.11 with new FSCTL_DUPLICATE_EXTENTSSteve French2015-06-281-3/+13
| | | | | | | | | | | | | | | | | | 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 <steve.french@primarydata.com>
* fix deadlock in cifs_ioctl_clone()Al Viro2015-01-181-16/+5
| | | | | | | | | | | | | | 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 <viro@zeniv.linux.org.uk>
* fs: cifs: new helper: file_inode(file)Libo Chen2014-05-211-1/+1
| | | | | | Signed-off-by: Libo Chen <clbchenlibo.chen@huawei.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
* [CIFS] Do not use btrfs refcopy ioctl for SMB2 copy offloadSteve French2013-11-251-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <smfrench@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: David Disseldorp <ddiss@samba.org>
* CIFS: SMB2/SMB3 Copy offload support (refcopy) phase 1Steve French2013-11-141-0/+111
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
* Fix unused variable warning when CIFS POSIX disabledSteve French2013-11-021-1/+1
| | | | | | | | | | | | 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 <smfrench@gmail.com>
* Allow setting per-file compression via SMB2/3Steve French2013-10-281-18/+37
| | | | | | | | | | | | | 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 <smfrench@gmail.com>
* [CIFS] cifs: Rename cERROR and cFYI to cifs_dbgJoe Perches2013-05-041-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <joe@perches.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
* new helper: file_inode(file)Al Viro2013-02-221-1/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* cifs: remove support for CIFS_IOC_CHECKUMOUNT ioctlJeff Layton2012-09-241-19/+0
| | | | | | | ...as promised for 3.7. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Replace netfid with cifs_fid struct in cifsFileInfoPavel Shilovsky2012-09-241-4/+9
| | | | | | | | | | | | This is help us to extend the code for future protocols that can use another fid mechanism (as SMB2 that has it divided into two parts: persistent and violatile). Also rename variables and refactor the code around the changes. Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Rename Get/FreeXid and make them work with unsigned intPavel Shilovsky2012-07-241-3/+3
| | | | | | Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* cifs: add a deprecation warning to CIFS_IOC_CHECKUMOUNT ioctlJeff Layton2012-05-161-0/+8
| | | | | | | This was used by an ancient version of umount.cifs and in nowhere else that I'm aware of. Let's add a warning now and dump it for 3.7. Signed-off-by: Jeff Layton <jlayton@redhat.com>
* [CIFS] Rename three structures to avoid camel caseSteve French2011-05-271-1/+1
| | | | | | | | | | secMode to sec_mode and cifsTconInfo to cifs_tcon and cifsSesInfo to cifs_ses Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: make cifs_ioctl handle NULL filp->private_data correctlyJeff Layton2010-11-081-2/+10
| | | | | | | | | | | | | | | | | | | Commit 13cfb7334e made cifs_ioctl use the tlink attached to the cifsFileInfo for a filp. This ignores the case of an open directory however, which in CIFS can have a NULL private_data until a readdir is done on it. This patch re-adds the NULL pointer checks that were removed in commit 50ae28f01 and moves the setting of tcon and "caps" variables lower. Long term, a better fix would be to establish a f_op->open routine for directories that populates that field at open time, but that requires some other changes to how readdir calls are handled. Reported-by: Kjell Rune Skaaraas <kjella79@yahoo.no> Reviewed-and-Tested-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* FS: cifs, remove unneeded NULL testsJiri Slaby2010-11-021-4/+0
| | | | | | | | | | | | | | | | | | Stanse found that pSMBFile in cifs_ioctl and file->f_path.dentry in cifs_user_write are dereferenced prior their test to NULL. The alternative is not to dereference them before the tests. The patch is to point out the problem, you have to decide. While at it we cache the inode in cifs_user_write to a local variable and use all over the function. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Steve French <sfrench@samba.org> Cc: linux-cifs@vger.kernel.org Cc: Jeff Layton <jlayton@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: have cifsFileInfo hold a reference to a tlink rather than tcon pointerJeff Layton2010-10-061-1/+1
| | | | | | | | | | | cifsFileInfo needs a pointer to a tcon, but it doesn't currently hold a reference to it. Change it to keep a pointer to a tcon_link instead and hold a reference to it. That will keep the tcon from being freed until the file is closed. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: make various routines use the cifsFileInfo->tcon pointerJeff Layton2010-09-291-14/+3
| | | | | | | ...where it's available and appropriate. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* fs/cifs: Remove unnecessary casts of private_dataJoe Perches2010-08-021-2/+1
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Neaten cERROR and cFYI macros, reduce text spaceJoe Perches2010-04-211-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Neaten cERROR and cFYI macros, reduce text space ~2.5K Convert '__FILE__ ": " fmt' to '"%s: " fmt', __FILE__' to save text space Surround macros with do {} while Add parentheses to macros Make statement expression macro from macro with assign Remove now unnecessary parentheses from cFYI and cERROR uses defconfig with CIFS support old $ size fs/cifs/built-in.o text data bss dec hex filename 156012 1760 148 157920 268e0 fs/cifs/built-in.o defconfig with CIFS support old $ size fs/cifs/built-in.o text data bss dec hex filename 153508 1760 148 155416 25f18 fs/cifs/built-in.o allyesconfig old: $ size fs/cifs/built-in.o text data bss dec hex filename 309138 3864 74824 387826 5eaf2 fs/cifs/built-in.o allyesconfig new $ size fs/cifs/built-in.o text data bss dec hex filename 305655 3864 74824 384343 5dd57 fs/cifs/built-in.o Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CRED: Wrap task credential accesses in the CIFS filesystemDavid Howells2008-11-141-1/+1
| | | | | | | | | | | | | | | | | | Wrap access to task credentials so that they can be separated more easily from the task_struct during the introduction of COW creds. Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id(). Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more sense to use RCU directly rather than a convenient wrapper; these will be addressed by later patches. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Steve French <sfrench@samba.org> Cc: linux-cifs-client@lists.samba.org Signed-off-by: James Morris <jmorris@namei.org>
* [CIFS] BKL-removal: convert CIFS over to unlocked_ioctlSteve French2008-05-151-2/+2
| | | | | | | | | cifs_ioctl doesn't seem to need the BKL for anything, so convert it over to use unlocked_ioctl. Signed-off-by: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] reduce checkpatch warningsSteve French2008-02-071-1/+1
| | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] whitespace cleanupSteve French2007-07-101-2/+2
| | | | | | More than halfway there Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] whitespace cleanupSteve French2007-06-051-15/+14
| | | | | | | | | Various coding style problems found by running fs/cifs against the new checkpatch.pl script. Since there were too many to fit in one patch. Updated the first four files. Signed-off-by: Steve French <sfrench@us.ibm.com>
* [PATCH] BLOCK: Move common FS-specific ioctls to linux/fs.h [try #6]David Howells2006-09-301-4/+3
| | | | | | | | | | | Move common FS-specific ioctls from linux/ext2_fs.h to linux/fs.h as FS_IOC_* and FS_IOC32_* and have the users of them use those as a base. Also move the GETFLAGS/SETFLAGS flags to linux/fs.h as FS_*_FL macros, and then have the other users use them as a base. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* [PATCH] cifs: cleanup of ifdefs usage so it is more consistentSteve French2005-04-281-10/+11
| | | | | | | | And fix to not needlessly send new POSIX QFSInfo when server does not explicitly claim support for the new protocol extensions. Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cifs: CIFS ioctl needed by umount.cifs utilitySteve French2005-04-281-8/+23
| | | | | Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cifs: Enable ioctl support in POSIX extensions to handle lsattrSteve French2005-04-281-0/+1
| | | | | | | | remove sparse warnings, unnecessary pad in QueryFileInfo and redundant function define. Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cifs: add support for chattr/lsattr in new CIFS POSIX extensionsSteve French2005-04-281-3/+49
| | | | | Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+49
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!
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