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2012-10-09mm: kill vma flag VM_CAN_NONLINEARKonstantin Khlebnikov1-0/+1
Move actual pte filling for non-linear file mappings into the new special vma operation: ->remap_pages(). Filesystems must implement this method to get non-linear mapping support, if it uses filemap_fault() then generic_file_remap_pages() can be used. Now device drivers can implement this method and obtain nonlinear vma support. Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Carsten Otte <cotte@de.ibm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> #arch/tile Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Eric Paris <eparis@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Morris <james.l.morris@oracle.com> Cc: Jason Baron <jbaron@redhat.com> Cc: Kentaro Takeda <takedakn@nttdata.co.jp> Cc: Matt Helsley <matthltc@us.ibm.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Venkatesh Pallipadi <venki@google.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-02Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-0/+5
Pull vfs update from Al Viro: - big one - consolidation of descriptor-related logics; almost all of that is moved to fs/file.c (BTW, I'm seriously tempted to rename the result to fd.c. As it is, we have a situation when file_table.c is about handling of struct file and file.c is about handling of descriptor tables; the reasons are historical - file_table.c used to be about a static array of struct file we used to have way back). A lot of stray ends got cleaned up and converted to saner primitives, disgusting mess in android/binder.c is still disgusting, but at least doesn't poke so much in descriptor table guts anymore. A bunch of relatively minor races got fixed in process, plus an ext4 struct file leak. - related thing - fget_light() partially unuglified; see fdget() in there (and yes, it generates the code as good as we used to have). - also related - bits of Cyrill's procfs stuff that got entangled into that work; _not_ all of it, just the initial move to fs/proc/fd.c and switch of fdinfo to seq_file. - Alex's fs/coredump.c spiltoff - the same story, had been easier to take that commit than mess with conflicts. The rest is a separate pile, this was just a mechanical code movement. - a few misc patches all over the place. Not all for this cycle, there'll be more (and quite a few currently sit in akpm's tree)." Fix up trivial conflicts in the android binder driver, and some fairly simple conflicts due to two different changes to the sock_alloc_file() interface ("take descriptor handling from sock_alloc_file() to callers" vs "net: Providing protocol type via system.sockprotoname xattr of /proc/PID/fd entries" adding a dentry name to the socket) * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits) MAX_LFS_FILESIZE should be a loff_t compat: fs: Generic compat_sys_sendfile implementation fs: push rcu_barrier() from deactivate_locked_super() to filesystems btrfs: reada_extent doesn't need kref for refcount coredump: move core dump functionality into its own file coredump: prevent double-free on an error path in core dumper usb/gadget: fix misannotations fcntl: fix misannotations ceph: don't abuse d_delete() on failure exits hypfs: ->d_parent is never NULL or negative vfs: delete surplus inode NULL check switch simple cases of fget_light to fdget new helpers: fdget()/fdput() switch o2hb_region_dev_write() to fget_light() proc_map_files_readdir(): don't bother with grabbing files make get_file() return its argument vhost_set_vring(): turn pollstart/pollstop into bool switch prctl_set_mm_exe_file() to fget_light() switch xfs_find_handle() to fget_light() switch xfs_swapext() to fget_light() ...
2012-10-02fs: push rcu_barrier() from deactivate_locked_super() to filesystemsKirill A. Shutemov1-0/+5
There's no reason to call rcu_barrier() on every deactivate_locked_super(). We only need to make sure that all delayed rcu free inodes are flushed before we destroy related cache. Removing rcu_barrier() from deactivate_locked_super() affects some fast paths. E.g. on my machine exit_group() of a last process in IPC namespace takes 0.07538s. rcu_barrier() takes 0.05188s of that time. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-01[CIFS] Fix indentation of fs/cifs/Kconfig entriesSteve French1-18/+19
make menuconfig for cifs shows multiple entries toward the end of the list with the incorrect indentation (probably a bug in Kconfig parsing of items that are dependant on the module (cifs=m instead of just CONFIG_CIFS). This patch fixes the indentation of all but the last entry (CIFS_ACL) which I don't know how to fix. It also clarifies wording in two places Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-10-01[CIFS] Fix SMB2 negotiation support to select only one dialect (based on vers=)Steve French5-29/+56
Based on whether the user (on mount command) chooses: vers=3.0 (for smb3.0 support) vers=2.1 (for smb2.1 support) or (with subsequent patch, which will allow SMB2 support) vers=2.0 (for original smb2.02 dialect support) send only one dialect at a time during negotiate (we had been sending a list). Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-28cifs: obtain file access during backup intent lookup (resend)Shirish Pargaonkar5-41/+80
Rebased and resending the patch. Path based queries can fail for lack of access, especially during lookup during open. open itself would actually succeed becasue of back up intent bit but queries (either path or file handle based) do not have a means to specifiy backup intent bit. So query the file info during lookup using trans2 / findfirst / file_id_full_dir_info to obtain file info as well as file_id/inode value. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Acked-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-26CIFS: Fix possible freed pointer dereference in CIFS_SessSetupPavel Shilovsky1-1/+2
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-26CIFS: Fix possible freed pointer dereference in SMB2_sess_setupPavel Shilovsky1-32/+3
and remove redundant (rsp == NULL) checks after SendReceive2. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-26CIFS: Make ops->close return voidPavel Shilovsky4-8/+8
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-26cifs: change DOS/NT/POSIX mapping of ERRnoresourceJeff Layton2-4/+5
ERRnoresource is an ERRSRV level (aka server-side) error and means "No resources currently available for request". Currently that maps to POSIX -ENOBUFS. No NT errors map to it currently. NT_STATUS_INSUFFICIENT_RESOURCES and NT_STATUS_INSUFF_SERVER_RESOURCES are also similar in meaning. Currently the client maps those to ERRnomem, which maps to -ENOMEM in POSIX. All of these mappings seem to be quite wrong to me and are confusing for users. All of the above errors indicate problems on the server, not the client. Reporting -ENOMEM or -ENOBUFS implies that the client is running out of resources. This patch changes those mappings. The NT_* errors are changed to map to the SRV level ERRnoresource. That error is in turn changed to return -EREMOTEIO which is the only POSIX error I could find that conveys that something went wrong on the server. While we're at it, change the SMB2 equivalent error to return the same. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Suresh Jayaraman <sjayaraman@suse.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: remove support for deprecated "forcedirectio" and "strictcache" mount optionsJeff Layton1-33/+4
...and make the default cache=strict as promised for 3.7. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: remove support for CIFS_IOC_CHECKUMOUNT ioctlJeff Layton1-19/+0
...as promised for 3.7. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24CIFS: Fix possible memory leaks in SMB2 codePavel Shilovsky1-9/+14
and add missed increments of failed async read and write requests. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24CIFS: Fix endian conversion of IndexNumberPavel Shilovsky1-1/+1
by making it __le64 rather than __u64 in FILE_AL_INFO structure. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24Trivial endian fixesSteve French2-3/+4
Some trivial endian fixes for the SMB2 code. One warning remains which I asked Pavel to look at. Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24MARK SMB2 support EXPERIMENTALSteve French1-1/+1
Now that the merge of the remaining pieces needed for SMB2 (SMB2.1 dialect) are in, and most test cases pass, we can consider SMB2.1 EXPERIMENTAL rather than "BROKEN." Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24Update cifs version numberSteve French1-1/+1
With SMB2 support, update from version 1.79 to 2.0 to make it easier for users to recognize which version has SMB2 support. Signed-off-by: Steve French <sfrench@us.ibm.com> Reviewed-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: add FL_CLOSE to fl_flags mask in cifs_read_flockJeff Layton1-1/+2
FL_CLOSE is quite common when you close a file on which you hold a lock. The spurious "Unknown lock flags" message in cFYI is confusing in this case. Reported-by: Alexander Bokovoy <abokovoy@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24cifs: Mangle string used for unc in /proc/mountsSachin Prabhu1-1/+2
The string for "unc=" in /proc/mounts needs to be escaped. The current behaviour can create problems in cases when mounting a share starting with a number. example: >mount -t cifs -o username=test,password=x vm140-31:/17000-test /mnt >mount -o remount,password=x /mnt mount error: could not resolve address for vm140-31x00-test: Unknown error The sub-string "\170" which is part of the unc for the mount above in /proc/mounts is interpreted as character'x' in the case above. Escaping the string fixes the problem. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24cifs: cleanups for cifs_mkdir_qinfoJeff Layton1-27/+24
Rename inode pointers for better clarity. Move the d_instantiate call to the end of the function to prevent other tasks from seeing it before we've finished constructing it. Since we should have exclusive access to the inode at this point, remove the spinlock around i_nlink update. Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Fix fast lease break after open problemPavel Shilovsky7-10/+158
Now we walk though cifsFileInfo's list for every incoming lease break and look for an equivalent there. That approach misses lease breaks that come just after an open response - we don't have time to populate new cifsFileInfo structure to the list. Fix this by adding new list of pending opens and look for a lease there if we didn't find it in the list of cifsFileInfo structures. Signed-off-by: Pavel Shilovsky <pshilovsky@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Add SMB2.1 lease break supportPavel Shilovsky6-14/+157
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Fix cache coherency for read oplock casePavel Shilovsky1-4/+23
When we have a file opened with read oplock and we are writing a data to this file, we need to store the data in the cache and then send to the server to ensure that the next read operation will get a coherent data. Also mark it as CONFIG_CIFS_SMB2 because it's more suitable for SMB2 code but can fix some CIFS problems too (when server delays sending an oplock break after a write request). We can drop this ifdefs dependence in future. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Request SMB2.1 leasesPavel Shilovsky8-27/+256
if server supports them and we need oplocks. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Check for mandatory brlocks on read/writePavel Shilovsky2-23/+102
Currently CIFS code accept read/write ops on mandatory locked area when two processes use the same file descriptor - it's wrong. Fix this by serializing io and brlock operations on the inode. Signed-off-by: Pavel Shilovsky <pshilovsky@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Turn lock mutex into rw semaphorePavel Shilovsky4-38/+41
and allow several processes to walk through the lock list and read can_cache_brlcks value if they are not going to modify them. Signed-off-by: Pavel Shilovsky <pshilovsky@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Use brlock cache for SMB2Pavel Shilovsky3-1/+94
Signed-off-by: Pavel Shilovsky <pshilovsky@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24CIFS: Add brlock support for SMB2Pavel Shilovsky7-5/+210
Signed-off-by: Pavel Shilovsky <pshilovsky@etersoft.ru>
2012-09-24CIFS: Handle SMB2 lock flagsPavel Shilovsky2-0/+17
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-09-24CIFS: Move brlock code to ops structPavel Shilovsky4-25/+40
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
2012-09-24CIFS: Remove spinlock dependence in brlock processingPavel Shilovsky3-39/+53
Now we need to lock/unlock a spinlock while processing brlock ops on the inode. Move brlocks of a fid to a separate list and attach all such lists to the inode. This let us not hold a spinlock. Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
2012-09-24CIFS: Add NTLMSSP sec type to defaultsPavel Shilovsky1-1/+1
to let us negotiate SMB2 without specifying sec type explicitly. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
2012-09-24cifs: remove kmap lock and rsize limitJeff Layton4-49/+0
Now that we aren't abusing the kmap address space, there's no need for this lock or to impose a limit on the rsize. Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: replace kvec array in readdata with a single kvecJeff Layton4-32/+21
The array is no longer needed. We just need a single kvec to hold the header for signature checking. Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: convert async read code to use pages array without kmappingJeff Layton4-81/+80
Replace the "marshal_iov" function with a "read_into_pages" function. That function will copy the read data off the socket and into the pages array, kmapping and reading pages one at a time. Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: turn the pages list in cifs_readdata into an arrayJeff Layton2-38/+52
We'll need an array to put into a smb_rqst, so convert this into an array instead of (ab)using the lru list_head. Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: allocate kvec array for cifs_readdata as a separate allocationJeff Layton2-4/+13
Eventually, we're going to want to append a list of pages to cifs_readdata instead of a list of kvecs. To prepare for that, turn the kvec array allocation into a separate one and just keep a pointer to it in the readdata. Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: add deprecation warning to sockopt=TCP_NODELAY optionJeff Layton1-5/+6
Now that we're using TCP_CORK on the socket, there's no value in continuting to support this option. Schedule it for removal in 3.9. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-09-24cifs: remove the kmap size limit from wsizeJeff Layton2-6/+0
Now that we're not kmapping so much at once, there's no need to cap the wsize at the amount that can be simultaneously kmapped. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: convert async write code to pass in data via rq_pages arrayJeff Layton4-95/+33
Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: change cifs_call_async to use smb_rqst structsJeff Layton7-79/+85
For now, none of the callers populate rq_pages. That will be done for writes in a later patch. While we're at it, change the prototype of setup_async_request not to need a return pointer argument. Just return the pointer to the mid_q_entry or an ERR_PTR. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: teach signing routines how to deal with arrays of pages in a smb_rqstJeff Layton4-1/+25
Use the smb_send_rqst helper function to kmap each page in the array and update the hash for that chunk. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: teach smb_send_rqst how to handle arrays of pagesJeff Layton1-2/+54
Add code that allows smb_send_rqst to send an array of pages after the initial kvec array has been sent. For now, we simply kmap the page array and send it using the standard smb_send_kvec function. Eventually, we may want to convert this code to use kernel_sendpage under the hood and avoid the kmap altogether for the page data. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: cork the socket before a send and uncork it afterwardJeff Layton2-0/+16
We want to send SMBs as "atomically" as possible. Prior to sending any data on the socket, cork it to make sure that no non-full frames go out. Afterward, uncork it to make sure all of the data gets pushed out to the wire. Note that this more or less renders the socket=TCP_NODELAY mount option obsolete. When TCP_CORK and TCP_NODELAY are used on the same socket, TCP_NODELAY is essentially ignored. Acked-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: convert send code to use smb_rqst structsJeff Layton1-45/+90
Again, just a change in the arguments and some function renaming here. In later patches, we'll change this code to deal with page arrays. In this patch, we add a new smb_send_rqst wrapper and have smb_sendv call that. Then we move most of the existing smb_sendv code into a new function -- smb_send_kvec. This seems a little redundant, but later we'll flesh this out to deal with arrays of pages. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: change smb2 signing routines to use smb_rqst structsJeff Layton3-26/+27
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24cifs: change signing routines to deal with smb_rqst structsJeff Layton5-14/+44
We need a way to represent a call to be sent on the wire that does not require having all of the page data kmapped. Behold the smb_rqst struct. This new struct represents an array of kvecs immediately followed by an array of pages. Convert the signing routines to use these structs under the hood and turn the existing functions for this into wrappers around that. For now, we're just changing these functions to take different args. Later, we'll teach them how to deal with arrays of pages. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24CIFS: Add statfs support for SMB2Pavel Shilovsky5-0/+127
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24CIFS: Move statfs to ops structPavel Shilovsky3-25/+43
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24CIFS: Add oplock break support for SMB2Pavel Shilovsky5-2/+141
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
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