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| * pNFS: If we have to delay the layout callback, mark the layout for returnTrond Myklebust2015-12-281-0/+3
| | | | | | | | | | | | | | | | If the client needs to delay the layout callback, then speed up the recall process by marking the remaining layout segments to be actively returned by the client. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
| * NFSv4.1/pNFS: Add a helper to mark the layout as returnedTrond Myklebust2015-12-281-0/+13
| | | | | | | | | | | | | | This ensures that we don't reuse the stateid if a layout return or implied layout return means that we've returned all layout segments Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* | pNFS/flexfiles: Don't prevent flexfiles client from retrying LAYOUTGETTrond Myklebust2015-12-281-21/+0
|/ | | | | | | | | | | Fix a bug in which flexfiles clients are falling back to I/O through the MDS even when the FF_FLAGS_NO_IO_THRU_MDS flag is set. The flexfiles client will always report errors through the LAYOUTRETURN and/or LAYOUTERROR mechanisms, so it should normally be safe for it to retry the LAYOUTGET until it fails or succeeds. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFS41: make close wait for layoutreturnPeng Tao2015-09-231-0/+7
| | | | | | | | | | | If we send a layoutreturn asynchronously before close, the close might reach server first and layoutreturn would fail with BADSTATEID because there is nothing keeping the layout stateid alive. Also do not pretend sending layoutreturn if we are not. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.1/flexfiles: Allow coalescing of new layout segments and existing onesTrond Myklebust2015-08-251-0/+16
| | | | | | | | | | In order to ensure atomicity of updates, we merge the old layout segments into the new ones, and then invalidate the old ones. Also ensure that we order the list of layout segments so that RO segments are preferred over RW. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.1/pnfs: Allow pNFS device drivers to customise layout segment insertionTrond Myklebust2015-08-251-0/+11
| | | | | | | | This is needed in order to allow merging of contiguous layout segments, and also to correct the ordering of layouts for those device drivers that don't necessarily want to place the read-write layouts first. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.1/pnfs Improve the packing of struct pnfs_layout_hdrTrond Myklebust2015-08-251-3/+3
| | | | | | | Eliminate a couple of holes in the structure, and move the 2 atomics into the same cacheline. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.2/pnfs: Make the layoutstats timer configurableTrond Myklebust2015-08-251-0/+3
| | | | | | | Allow advanced users to set the layoutstats timer in order to lengthen or shorten the period between layoutstat transmissions to the server. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFS41: remove NFS_LAYOUT_ROC flagPeng Tao2015-08-251-1/+0
| | | | | | | | | | If we return delegation before closing, we fail to do roc check during close because NFS_LAYOUT_ROC is cleared by delegreturn and it causes layouts to be still hanging around after delegreturn + close, which is a voilation against protocol. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.1/pnfs: Fix a close/delegreturn hang when return-on-close is setTrond Myklebust2015-08-181-4/+3
| | | | | | | | | | | | | | | | | | | | | The helper pnfs_roc() has already verified that we have no delegations, and no further open files, hence no outstanding I/O and it has marked all the return-on-close lsegs as being invalid. Furthermore, it sets the NFS_LAYOUT_RETURN bit, thus serialising the close/delegreturn with all future layoutget calls on this inode. The checks in pnfs_roc_drain() for valid layout segments are therefore redundant: those cannot exist until another layoutget completes. The other check for whether or not NFS_LAYOUT_RETURN is set, actually causes a hang, since we already know that we hold that flag. To fix, we therefore strip out all the functionality in pnfs_roc_drain() except the retrieval of the barrier state, and then rename the function accordingly. Reported-by: Christoph Hellwig <hch@infradead.org> Fixes: 5c4a79fb2b1c ("Don't prevent layoutgets when doing return-on-close") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.2/pnfs: Use GFP_NOIO for layoutstat reporting in the writeback pathTrond Myklebust2015-08-121-2/+2
| | | | | | Prevent a potential deadlock. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* nfs: provide pnfs_report_layoutstat when NFS42 is disabledPeng Tao2015-06-261-2/+10
| | | | | | | | | | kbuild test robot reported: fs/built-in.o: In function `pnfs_report_layoutstat': >> (.text+0x151a1c): undefined reference to `nfs42_proc_layoutstats_generic' Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs: add pnfs_report_layoutstat helper functionPeng Tao2015-06-241-0/+3
| | | | | | Reviewed-by: Jeff Layton <jeff.layton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* Merge tag 'nfs-for-4.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds2015-04-261-2/+22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client updates from Trond Myklebust: "Another set of mainly bugfixes and a couple of cleanups. No new functionality in this round. Highlights include: Stable patches: - Fix a regression in /proc/self/mountstats - Fix the pNFS flexfiles O_DIRECT support - Fix high load average due to callback thread sleeping Bugfixes: - Various patches to fix the pNFS layoutcommit support - Do not cache pNFS deviceids unless server notifications are enabled - Fix a SUNRPC transport reconnection regression - make debugfs file creation failure non-fatal in SUNRPC - Another fix for circular directory warnings on NFSv4 "junctioned" mountpoints - Fix locking around NFSv4.2 fallocate() support - Truncating NFSv4 file opens should also sync O_DIRECT writes - Prevent infinite loop in rpcrdma_ep_create() Features: - Various improvements to the RDMA transport code's handling of memory registration - Various code cleanups" * tag 'nfs-for-4.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (55 commits) fs/nfs: fix new compiler warning about boolean in switch nfs: Remove unneeded casts in nfs NFS: Don't attempt to decode missing directory entries Revert "nfs: replace nfs_add_stats with nfs_inc_stats when add one" NFS: Rename idmap.c to nfs4idmap.c NFS: Move nfs_idmap.h into fs/nfs/ NFS: Remove CONFIG_NFS_V4 checks from nfs_idmap.h NFS: Add a stub for GETDEVICELIST nfs: remove WARN_ON_ONCE from nfs_direct_good_bytes nfs: fix DIO good bytes calculation nfs: Fetch MOUNTED_ON_FILEID when updating an inode sunrpc: make debugfs file creation failure non-fatal nfs: fix high load average due to callback thread sleeping NFS: Reduce time spent holding the i_mutex during fallocate() NFS: Don't zap caches on fallocate() xprtrdma: Make rpcrdma_{un}map_one() into inline functions xprtrdma: Handle non-SEND completions via a callout xprtrdma: Add "open" memreg op xprtrdma: Add "destroy MRs" memreg op xprtrdma: Add "reset MRs" memreg op ...
| * NFSv4.1/pnfs: Separate out metadata and data consistency for pNFSTrond Myklebust2015-03-271-0/+18
| | | | | | | | | | | | | | | | | | | | | | The LAYOUTCOMMIT operation means different things to different layout types. For blocks and objects, it is both a data and metadata consistency operation. For files and flexfiles, it is only a metadata consistency operation. This patch separates out the 2 cases, allowing the files/flexfiles layout drivers to optimise away the data consistency calls to layoutcommit. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
| * NFSv4.1/pnfs: Refactor pnfs_set_layoutcommit()Trond Myklebust2015-03-271-2/+1
| | | | | | | | | | | | | | pnfs_set_layoutcommit() and pnfs_commit_set_layoutcommit() are 100% identical except for the function arguments. Refactor to eliminate the difference. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
| * NFSv4.1: Don't cache deviceids that have no notificationsTrond Myklebust2015-03-271-0/+2
| | | | | | | | | | | | | | | | The spec says that once all layouts that reference a given deviceid have been returned, then we are only allowed to continue to cache the deviceid if the metadata server supports notifications. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
| * NFSv4.1: Convert pNFS deviceid to use kfree_rcu()Trond Myklebust2015-03-271-0/+1
| | | | | | | | | | | | | | | | Use of synchronize_rcu() when unmounting and potentially freeing a lot of deviceids is problematic. There really is no reason why we can't just use kfree_rcu() here. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* | VFS: normal filesystems (and lustre): d_inode() annotationsDavid Howells2015-04-151-2/+2
|/ | | | | | | that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* pnfs: Refactor the *_layout_mark_request_commit to use ↵Tom Haynes2015-02-181-0/+4
| | | | | | | | | | | pnfs_layout_mark_request_commit The File Layout's filelayout_mark_request_commit() is almost the Flex File Layout's ff_layout_mark_request_commit(). And that can be reduced by calling into nfs_request_add_commit_list(). Signed-off-by: Tom Haynes <loghyr@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* Merge branch 'flexfiles'Trond Myklebust2015-02-031-20/+105
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * flexfiles: (53 commits) pnfs: lookup new lseg at lseg boundary nfs41: .init_read and .init_write can be called with valid pg_lseg pnfs: Update documentation on the Layout Drivers pnfs/flexfiles: Add the FlexFile Layout Driver nfs: count DIO good bytes correctly with mirroring nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET nfs: add a helper to set NFS_ODIRECT_RESCHED_WRITES to direct writes nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags nfs/flexfiles: send layoutreturn before freeing lseg nfs41: introduce NFS_LAYOUT_RETURN_BEFORE_CLOSE nfs41: allow async version layoutreturn nfs41: add range to layoutreturn args pnfs: allow LD to ask to resend read through pnfs nfs: add nfs_pgio_current_mirror helper nfs: only reset desc->pg_mirror_idx when mirroring is supported nfs41: add a debug warning if we destroy an unempty layout pnfs: fail comparison when bucket verifier not set nfs: mirroring support for direct io nfs: add mirroring support to pgio layer pnfs: pass ds_commit_idx through the commit path ... Conflicts: fs/nfs/pnfs.c fs/nfs/pnfs.h
| * pnfs/flexfiles: Add the FlexFile Layout DriverTom Haynes2015-02-031-0/+1
| | | | | | | | | | | | | | | | | | | | The flexfile layout is a new layout that extends the file layout. It is currently being drafted as a specification at https://datatracker.ietf.org/doc/draft-ietf-nfsv4-layout-types/ Signed-off-by: Weston Andros Adamson <dros@primarydata.com> Signed-off-by: Tom Haynes <loghyr@primarydata.com> Signed-off-by: Tao Peng <bergwolf@primarydata.com>
| * nfs41: wait for LAYOUTRETURN before retrying LAYOUTGETPeng Tao2015-02-031-1/+4
| | | | | | | | | | | | Also take care to stop waiting if someone clears retry bit. Signed-off-by: Peng Tao <tao.peng@primarydata.com>
| * nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flagsPeng Tao2015-02-031-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | Use it to indicate that LD wants to retry layoutget. LD can set it whenever it wants the common pnfs code to return and retry pnfs path through a new layout. The bit gets cleared when client does a new layoutget, when client closes the file (ROC case), or when kernel needs to evict the inode (non-ROC case). Signed-off-by: Peng Tao <tao.peng@primarydata.com>
| * nfs41: introduce NFS_LAYOUT_RETURN_BEFORE_CLOSEPeng Tao2015-02-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When it is set, generic pnfs would try to send layoutreturn right before last close/delegation_return regard less NFS_LAYOUT_ROC is set or not. LD can then make sure layoutreturn is always sent rather than being omitted. The difference against NFS_LAYOUT_RETURN is that NFS_LAYOUT_RETURN_BEFORE_CLOSE does not block usage of the layout so LD can set it and expect generic layer to try pnfs path at the same time. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <loghyr@primarydata.com>
| * nfs41: allow async version layoutreturnPeng Tao2015-02-031-1/+1
| | | | | | | | | | Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <loghyr@primarydata.com>
| * pnfs: allow LD to ask to resend read through pnfsPeng Tao2015-02-031-0/+2
| | | | | | | | | | | | | | | | | | If current IO cannot be completed due to some transient errors, LD may want to ask generic layer to resend the request through pnfs again. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <loghyr@primarydata.com>
| * pnfs: pass ds_commit_idx through the commit pathWeston Andros Adamson2015-02-031-4/+5
| | | | | | | | | | | | | | | | | | | | Pass ds_commit_idx through the nfs commit path. It's used to select the commit bucket when using pnfs and is ignored when not using pnfs. Several functions had to be changed: nfs_retry_commit, nfs_mark_request_commit, pnfs_mark_request_commit and the pnfs layout driver .mark_request_commit functions. Signed-off-by: Tom Haynes <loghyr@primarydata.com>
| * pnfs: release lseg in pnfs_generic_pg_cleanupWeston Andros Adamson2015-02-031-0/+1
| | | | | | | | | | | | | | | | This is needed to support mirrored writes - the first write can't just trash the lseg, we need to keep it around until all mirrors have written. Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
| * nfs41: don't use a layout if it is marked for returningPeng Tao2015-02-031-0/+1
| | | | | | | | | | | | | | | | And if we are to return the same type of layouts, don't bother sending more layoutgets. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: add a helper to mark layout for returnPeng Tao2015-02-031-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | It marks all matching layout segments as NFS_LSEG_LAYOUTRETURN, which is an indicator for pnfs_put_lseg() to send layoutreturn, and also prevents pnfs_update_layout() from using the returning segments. Once it is set, it never gets cleared. It also sets proper io failure bit so that pnfs path can be retried after PNFS_LAYOUTGET_RETRY_TIMEOUT second. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: serialize first layoutget of a filePeng Tao2015-02-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Per RFC 5661 Errata 3208: | A client MAY always forget its layout state and associated | layout stateid at any time (See also section 12.5.5.1). | In such case, the client MUST use a non-layout stateid for the next | LAYOUTGET operation. This will signal the server that the client has | no more layouts on the file and its respective layout state can be | released before issuing a new layout in response to LAYOUTGET. In order to make such a signal unique to server, client needs to serialize all layoutgets using non-layout stateid. We implement this by serializing layoutgets when client has no layout segments at hand. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: create NFSv3 DS connection if specifiedPeng Tao2015-02-031-1/+6
| | | | | | | | | | Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: allow LD to choose DS connection version/minor_versionPeng Tao2015-02-031-1/+2
| | | | | | | | | | | | | | flexfile layout may need to set such when making DS connections. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: move file layout macros to generic pnfsPeng Tao2015-02-031-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | They can be reused by flexfile layout as well. Also add a code such that if read fails on one DS and there are other DSes available to use, don't resend through MDS but through pNFS so that client can read from other DSes. Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: allow LD to choose DS connection auth flavorPeng Tao2015-02-031-1/+1
| | | | | | | | | | | | | | | | flexfile layout may use different auth flavor as specified by MDS. Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: pull nfs4_ds_connect from file layout to generic pnfsPeng Tao2015-02-031-0/+3
| | | | | | | | | | | | | | | | It can be reused by flexfiles layout client. Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: pull decode_ds_addr from file layout to generic pnfsPeng Tao2015-02-031-0/+3
| | | | | | | | | | | | | | | | It can be reused by flexfile layout. Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * nfs41: pull data server cache from file layout to generic pnfsPeng Tao2015-02-031-0/+21
| | | | | | | | | | | | | | | | | | | | Also pull nfs4_pnfs_ds_addr and nfs4_pnfs_ds to generic pnfs. They can all be reused by flexfile layout as well. Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
| * pnfs: Do not grab the commit_info lock twice when rescheduling writesTom Haynes2015-02-031-15/+0
| | | | | | | | | | Acked-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Tom Haynes <loghyr@primarydata.com>
| * pnfs: Prepare for flexfiles by pulling out common codeTom Haynes2015-02-031-0/+23
| | | | | | | | | | | | | | | | The flexfilelayout driver will share some common code with the filelayout driver. This set of changes refactors that common code out to avoid any module depenencies. Signed-off-by: Tom Haynes <loghyr@primarydata.com>
* | NFSv4.1: Optimise layout return-on-closeTrond Myklebust2015-01-241-0/+10
|/ | | | | | | | | | Optimise the layout return on close code by ensuring that 1) Add a check for whether we hold a layout before taking any spinlocks 2) Only take the spin lock once 3) Use nfs_state->state to speed up open file checks Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4.1/pnfs: replace broken pnfs_put_lseg_asyncTrond Myklebust2014-10-081-5/+1
| | | | | | | | | | | | | You cannot call pnfs_put_lseg_async() more than once per lseg, so it is really an inappropriate way to deal with a refcount issue. Instead, replace it with a function that decrements the refcount, and puts the final 'free' operation (which is incompatible with locks) on the workqueue. Cc: Weston Andros Adamson <dros@primarydata.com> Fixes: e6cf82d1830f: pnfs: add pnfs_put_lseg_async Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* NFSv4: Remove dead prototype for nfs4_insert_deviceid_node()Tom Haynes2014-10-081-1/+0
| | | | | | | | nfs4_insert_deviceid_node() was removed in 661373b13d0490ff410a2133d4a7a117f2dd037e Signed-off-by: Tom Haynes <loghyr@primarydata.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* nfs41: change PNFS_LAYOUTRET_ON_SETATTR to only return on truncation to ↵Peng Tao2014-09-121-1/+2
| | | | | | | | | | | | | | | smaller size Both blocks layout and objects layout want to use it to avoid CB_LAYOUTRECALL but that should only happen if client is doing truncation to a smaller size. For other cases, we let server decide if it wants to recall client's layouts. Change PNFS_LAYOUTRET_ON_SETATTR to follow the logic and not to send layoutreturn unnecessarily. Cc: Christoph Hellwig <hch@lst.de> Cc: Boaz Harrosh <boaz@plexistor.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs: remove GETDEVICELIST implementationChristoph Hellwig2014-09-121-5/+0
| | | | | | | | | | | The current GETDEVICELIST implementation is buggy in that it doesn't handle cursors correctly, and in that it returns an error if the server returns NFSERR_NOTSUPP. Given that there is no actual need for GETDEVICELIST, it has various issues and might get removed for NFSv4.2 stop using it in the blocklayout driver, and thus the Linux NFS client as whole. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs: add a nfs4_get_deviceid helperChristoph Hellwig2014-09-101-0/+7
| | | | | | | This will be used by the block layout driver when splitting extents. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs: add a common GETDEVICELIST implementationChristoph Hellwig2014-09-101-0/+2
| | | | | | | | At a simple helper to issue a GETDEVICELIST operation and pre-load the device id cache based on the result. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs: factor GETDEVICEINFO implementationsChristoph Hellwig2014-09-101-4/+9
| | | | | | | | | | | | Add support to the common pNFS core to issue GETDEVICEINFO calls on a device ID cache miss. The code is taken from the well debugged file layout implementation and calls out to the layoutdriver through a new alloc_deviceid_node method. The calling conventions for nfs4_find_get_deviceid are changed so that all information needed to send a GETDEVICEINFO request is passed to the common code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
* pnfs: add return_range methodChristoph Hellwig2014-09-101-0/+3
| | | | | | | | | | | If a layout driver keeps per-inode state outside of the layout segments it needs to be notified of any layout returns or recalls on an inode, and not just about the freeing of layout segments. Add a method to acomplish this, which will allow the block layout driver to handle the case of truncated and re-expanded files properly. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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