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path: root/include/linux/nfs_page.h
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2011-10-19NFS: Don't rely on PageError in nfs_readpage_release_partialTrond Myklebust1-0/+1
Don't rely on the PageError flag to tell us if one of the partial reads of the page failed. Instead, replace that with a dedicated flag in the struct nfs_page. Then clean out redundant uses of the PageError flag: the VM no longer checks it for reads. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Move the pnfs write code into pnfs.cTrond Myklebust1-3/+0
...and ensure that we recoalese to take into account differences in differences in block sizes when falling back to write through the MDS. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Move the pnfs read code into pnfs.cTrond Myklebust1-1/+0
...and ensure that we recoalese to take into account differences in block sizes when falling back to read through the MDS. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Allow the nfs_pageio_descriptor to signal that a re-coalesce is neededTrond Myklebust1-1/+2
If an attempt to do pNFS fails, and we have to fall back to writing through the MDS, then we may want to re-coalesce the requests that we already have since the block size for the MDS read/writes may be different to that of the DS read/writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Cache rpc_ops in struct nfs_pageio_descriptorTrond Myklebust1-0/+1
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-12NFSv4.1: Add an initialisation callback for pNFSTrond Myklebust1-0/+1
Ensure that we always get a layout before setting up the i/o request. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-12NFS: Cleanup of the nfs_pageio code in preparation for a pnfs bugfixTrond Myklebust1-3/+11
We need to ensure that the layouts are set up before we can decide to coalesce requests. To do so, we want to further split up the struct nfs_pageio_descriptor operations into an initialisation callback, a coalescing test callback, and a 'do i/o' callback. This patch cleans up the existing callback methods before adding the 'initialisation' callback. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-20NFSv4.1: file layout must consider pg_bsize for coalescingBenny Halevy1-0/+3
Otherwise we end up overflowing the rpc buffer size on the receive end. Signed-off-by: Benny Halevy <benny@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-05-29NFSv4.1: change pg_test return type to boolBenny Halevy1-1/+1
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-03-27NFS: Fix a hang in the writeback pathTrond Myklebust1-1/+0
Now that the inode scalability patches have been merged, it is no longer safe to call igrab() under the inode->i_lock. Now that we no longer call nfs_clear_request() until the nfs_page is being freed, we know that we are always holding a reference to the nfs_open_context, which again holds a reference to the path, and so the inode cannot be freed until the last nfs_page has been removed from the radix tree and freed. We can therefore skip the igrab()/iput() altogether. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-23NFSv4.1: add generic layer hooks for pnfs COMMITFred Isaman1-1/+5
We create three major hooks for the pnfs code. pnfs_mark_request_commit() is called during writeback_done from nfs_mark_request_commit, which gives the driver an opportunity to claim it wants control over commiting a particular req. pnfs_choose_commit_list() is called from nfs_scan_list to choose which list a given req should be added to, based on where we intend to send it for COMMIT. It is up to the driver to have preallocated list headers for each destination it may need. pnfs_commit_list() is how the driver actually takes control, it is used instead of nfs_commit_list(). In order to pass information between the above functions, we create a union in nfs_page to hold a lseg (which is possible because the req is not on any list while in transition), and add some flags to indicate if we need to use the pnfs code. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-21FS: Use stable writes when not doing a bulk flushTrond Myklebust1-0/+1
If we're only doing a single write, and there are no other unstable writes being queued up, we might want to just flip to using a stable write RPC call. Reviewed-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-11NFSv4.1: rearrange ->doio argsFred Isaman1-2/+2
This will make it possible to clear the lseg pointer in the same function as it is put, instead of in the caller nfs_pageio_doio(). Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-11NFSv4.1: shift pnfs_update_layout locationsFred Isaman1-2/+2
Move the pnfs_update_layout call location to nfs_pageio_do_add_request(). Grab the lseg sent in the doio function to nfs_read_rpcsetup and attach it to each nfs_read_data so it can be sent to the layout driver. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-11NFSv4.1: coelesce across layout stripesFred Isaman1-0/+2
Add a pg_test layout driver hook which is used to avoid coelescing I/O across layout stripes. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-07nfs: remove extraneous and problematic calls to nfs_clear_requestTrond Myklebust1-0/+1
When a nfs_page is freed, nfs_free_request is called which also calls nfs_clear_request to clean out the lock and open contexts and free the pagecache page. However, a couple of places in the nfs code call nfs_clear_request themselves. What happens here if the refcount on the request is still high? We'll be releasing contexts and freeing pointers while the request is possibly still in use. Remove those bare calls to nfs_clear_context. That should only be done when the request is being freed. Note that when doing this, we need to watch out for tests of req->wb_page. Previously, nfs_set_page_tag_locked() and nfs_clear_page_tag_locked() would check the value of req->wb_page to figure out if the page is mapped into the nfsi->nfs_page_tree. We now indicate the page is mapped using the new bit PG_MAPPED in req->wb_flags . Reported-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-07-30NFSv4: Ensure that we track the NFSv4 lock state in read/write requests.Trond Myklebust1-0/+1
This patch fixes bugzilla entry 14501: https://bugzilla.kernel.org/show_bug.cgi?id=14501 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09NFS: Allow redirtying of a completed unstable write.Trond Myklebust1-3/+6
Currently, if an unstable write completes, we cannot redirty the page in order to reflect a new change in the page data until after we've sent a COMMIT request. This patch allows a page rewrite to proceed without the unnecessary COMMIT step, putting it immediately back onto the dirty page list, undoing the VM unstable write accounting, and removing the NFS_PAGE_TAG_COMMIT tag from the NFS radix tree. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Clean up the write request locking.Trond Myklebust1-12/+1
Ensure that we set/clear NFS_PAGE_TAG_LOCKED when the nfs_page is hashed. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-10-09NFS: Clean up write code...Trond Myklebust1-1/+0
The addition of nfs_page_mkwrite means that We should no longer need to create requests inside nfs_writepage() Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-07-10NFS: Remove the redundant 'dirty' and 'commit' lists from nfs_inodeTrond Myklebust1-4/+1
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-07-10NFS cleanup: speed up nfs_scan_commit using radix tree tagsTrond Myklebust1-2/+3
Add a tag for requests that are waiting for a COMMIT Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-07-10NFS cleanup: Rename NFS_PAGE_TAG_WRITEBACK to NFS_PAGE_TAG_LOCKEDTrond Myklebust1-3/+2
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-07-10NFS: Convert struct nfs_page to use krefsTrond Myklebust1-5/+5
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-05-24NFS: Avoid a deadlock situation on writeTrond Myklebust1-0/+1
When processes are allowed to attempt to lock a non-contiguous range of nfs write requests, it is possible for generic_writepages to 'wrap round' the address space, and call writepage() on a request that is already locked by the same process. We avoid the deadlock by checking if the page index is contiguous with the list of nfs write requests that is already held in our nfs_pageio_descriptor prior to attempting to lock a new request. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-30NFS: Use pgoff_t in structures and functions that pass page cache offsetsTrond Myklebust1-2/+2
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-30NFS: Fix a buffer overflow in the allocation of struct nfs_read/writedataTrond Myklebust1-2/+2
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-30NFS: Fix a race when doing NFS write coalescingTrond Myklebust1-7/+1
Currently we do write coalescing in a very inefficient manner: one pass in generic_writepages() in order to lock the pages for writing, then one pass in nfs_flush_mapping() and/or nfs_sync_mapping_wait() in order to gather the locked pages for coalescing into RPC requests of size "wsize". In fact, it turns out there is actually a deadlock possible here since we only start I/O on the second pass. If the user signals the process while we're in nfs_sync_mapping_wait(), for instance, then we may exit before starting I/O on all the requests that have been queued up. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-30NFS: Cleanup for nfs_readpages()Trond Myklebust1-0/+2
Do the coalescing of read requests into block sized requests at start of I/O as we scan through the pages instead of going through a second pass. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-30NFS: Another cleanup of the read/write request coalescing codeTrond Myklebust1-2/+12
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-30NFS: Cleanup the coalescing codeTrond Myklebust1-2/+11
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-04-20NFS: clean up the unstable write codeTrond Myklebust1-30/+0
Get rid of the inlined #ifdefs. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-14NFS: Ensure PG_writeback is cleared when writeback failsTrond Myklebust1-1/+0
If the writebacks are cancelled via nfs_cancel_dirty_list, or due to the memory allocation failing in nfs_flush_one/nfs_flush_multi, then we must ensure that the PG_writeback flag is cleared. Also ensure that we actually own the PG_writeback flag whenever we schedule a new writeback by making nfs_set_page_writeback() return the value of test_set_page_writeback(). The PG_writeback page flag ends up replacing the functionality of the PG_FLUSHING nfs_page flag, so we rip that out too. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-06NFS: Make nfs_updatepage() mark the page as dirty.Trond Myklebust1-0/+1
This will ensure that we can call set_page_writeback() from within nfs_writepage(), which is always called with the page lock set. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-12-06NFS: Add nfs_set_page_dirty()Trond Myklebust1-0/+1
We will want to allow nfs_writepage() to distinguish between pages that have been marked as dirty by the VM, and those that have been marked as dirty by nfs_updatepage(). In the former case, the entire page will want to be written out, and so any requests that were pending need to be flushed out first. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-12-06NFS: Clean up nfs_scan_dirty()Trond Myklebust1-2/+3
Pass down struct writeback control. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-06-09NFS: Store the file system "fsid" value in the NFS super block.Trond Myklebust1-1/+0
This should enable us to detect if we are crossing a mountpoint in the case where the server is exporting "nohide" mounts. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-06-09NFS: Flesh out nfs_invalidate_page()Trond Myklebust1-2/+2
In the case of a call to truncate_inode_pages(), we should really try to cancel any pending writes on the page. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-01-06NFS: simplify inlined bit ops in nfs_page.hChuck Lever1-9/+3
Minor cleanup: inlined bit ops in nfs_page.h can be simpler. Test plan: Write-intensive workload against a server that requires COMMITs. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22[PATCH] NFS: Replace nfs_page insertion sort with a radix sortTrond Myklebust1-2/+16
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22[PATCH] NFS: Make searching and waiting on busy writeback requests more ↵Trond Myklebust1-4/+8
efficient. Basically copies the VFS's method for tracking writebacks and applies it to the struct nfs_page. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-04-16Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds1-0/+151
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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