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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmwLinus Torvalds2011-03-1618-378/+351
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: GFS2: Don't use _raw version of RCU dereference GFS2: Adding missing unlock_page() GFS2: Update to AIL list locking GFS2: introduce AIL lock GFS2: fix block allocation check for fallocate GFS2: Optimize glock multiple-dequeue code GFS2: Remove potential race in flock code GFS2: Fix glock deallocation race GFS2: quota allows exceeding hard limit GFS2: deallocation performance patch GFS2: panics on quotacheck update GFS2: Improve cluster mmap scalability GFS2: Fix glock queue trace point GFS2: Post-VFS scale update for RCU path walk GFS2: Use RCU for glock hash table
| * GFS2: Don't use _raw version of RCU dereferenceSteven Whitehouse2011-03-151-1/+1
| | | | | | | | | | | | | | | | | | As per RCU glock patch review comments, don't use the _raw version of this function here. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| * GFS2: Adding missing unlock_page()Maxim2011-03-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gfs2_write_begin() calls grab_cache_page_write_begin() that returns *locked* page. Correspondent error-handling path lacks for unlock_page() call: > out: > if (error == 0) > return 0; > > page_cache_release(page); The whole system hangs if gfs2_unstuff_dinode() called from gfs2_write_begin() failed for some reason. Reported-by: Maxim <maxim.patlasov@gmail.com> Signed-off-by: Maxim <maxim.patlasov@gmail.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Update to AIL list lockingSteven Whitehouse2011-03-143-1/+5
| | | | | | | | | | | | | | | | | | The previous patch missed a couple of places where the AIL list needed locking, so this fixes up those places, plus a comment is corrected too. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Dave Chinner <dchinner@redhat.com>
| * GFS2: introduce AIL lockDave Chinner2011-03-115-18/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The log lock is currently used to protect the AIL lists and the movements of buffers into and out of them. The lists are self contained and no log specific items outside the lists are accessed when starting or emptying the AIL lists. Hence the operation of the AIL does not require the protection of the log lock so split them out into a new AIL specific lock to reduce the amount of traffic on the log lock. This will also reduce the amount of serialisation that occurs when the gfs2_logd pushes on the AIL to move it forward. This reduces the impact of log pushing on sequential write throughput. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: fix block allocation check for fallocateBenjamin Marzinski2011-03-111-25/+31
| | | | | | | | | | | | | | | | | | | | | | | | GFS2 fallocate wasn't properly checking if a blocks were already allocated. In write_empty_blocks(), if a page didn't have buffer_heads attached, GFS2 was always treating it as if there were no blocks allocated for that page. GFS2 now calls gfs2_block_map() to check if the blocks are allocated before writing them out. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Optimize glock multiple-dequeue codeBob Peterson2011-03-111-8/+4
| | | | | | | | | | | | | | | | | | | | | | This is a small patch that optimizes multiple glock dequeue operations. It changes the unlock order to be more efficient and makes it easier for lock debugging tools to unravel. It also eliminates the need for the temp variable x, although that would likely be optimized out. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Remove potential race in flock codeSteven Whitehouse2011-03-091-2/+4
| | | | | | | | | | | | | | | | | | This patch ensures that we always wait for glock demotion when dropping flocks on a file in order to prevent any race conditions associated with further flock calls or closing the file. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Fix glock deallocation raceSteven Whitehouse2011-03-094-11/+12
| | | | | | | | | | | | | | | | | | | | | | This patch fixes a race in deallocating glocks which was introduced in the RCU glock patch. We need to ensure that the glock count is kept correct even in the case that there is a race to add a new glock into the hash table. Also, to avoid having to wait for an RCU grace period, the glock counter can be decremented before call_rcu() is called. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: quota allows exceeding hard limitAbhijith Das2011-03-092-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Immediately after being synced to disk, cached quotas are zeroed out and a subsequent access of the cached quotas results in incorrect zero values. This meant that gfs2 assumed the actual usage to be the zero (or near-zero) usage values it found in the cached quotas and comparison against warn/limits never triggered a quota violation. This patch adds a new flag QDF_REFRESH that is set after a sync so that the cached quotas are forcefully refreshed from disk on a subsequent access on seeing this flag set. Resolves: rhbz#675944 Signed-off-by: Abhi Das <adas@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: deallocation performance patchBob Peterson2011-02-243-8/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is a performance improvement to GFS2's dealloc code. Rather than update the quota file and statfs file for every single block that's stripped off in unlink function do_strip, this patch keeps track and updates them once for every layer that's stripped. This is done entirely inside the existing transaction, so there should be no risk of corruption. The other functions that deallocate blocks will be unaffected because they are using wrapper functions that do the same thing that they do today. I tested this code on my roth cluster by creating 200 files in a directory, each of which is 100MB, then on four nodes, I simultaneously deleted the files, thus competing for GFS2 resources (but different files). The commands I used were: [root@roth-01]# time for i in `seq 1 4 200` ; do rm /mnt/gfs2/bigdir/gfs2.$i; done [root@roth-02]# time for i in `seq 2 4 200` ; do rm /mnt/gfs2/bigdir/gfs2.$i; done [root@roth-03]# time for i in `seq 3 4 200` ; do rm /mnt/gfs2/bigdir/gfs2.$i; done [root@roth-05]# time for i in `seq 4 4 200` ; do rm /mnt/gfs2/bigdir/gfs2.$i; done The performance increase was significant: roth-01 roth-02 roth-03 roth-05 --------- --------- --------- --------- old: real 0m34.027 0m25.021s 0m23.906s 0m35.646s new: real 0m22.379s 0m24.362s 0m24.133s 0m18.562s Total time spent deleting: old: 118.6s new: 89.4 For this particular case, this showed a 25% performance increase for GFS2 unlinks. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: panics on quotacheck updateAbhijith Das2011-02-071-1/+5
| | | | | | | | | | | | | | | | | | | | Handle block allocation for forceful unstuffing of quota dinode during quota update using quotactl(). Also fix block reservation for special cases when quotas cross over block boundaries and update 2 blocks instead of 1. Signed-off-by: Abhi Das <adas@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Improve cluster mmap scalabilitySteven Whitehouse2011-02-021-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mmap system call grabs a glock when an update to atime maybe required. It does this in order to ensure that the flags on the inode are uptodate, but since it will only mark atime for a future update, an exclusive lock is not required here (one will be taken later when the actual update is performed). Also, the lock can be skipped when the mount is marked noatime in addition to the original check which only looked at the noatime flag for the inode itself. This should increase the scalability of the mmap call when multiple nodes are all mmaping the same file. Reported-by: Scooter Morris <scooter@cgl.ucsf.edu> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Fix glock queue trace pointSteven Whitehouse2011-01-311-1/+1
| | | | | | | | | | | | | | Somehow this tracepoint landed up in the wrong place. This moves it to where it should be. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Post-VFS scale update for RCU path walkSteven Whitehouse2011-01-212-7/+10
| | | | | | | | | | | | | | | | | | | | We can allow a few more cases to use RCU path walking than originally allowed. It should be possible to also enable RCU path walking when the glock is already cached. Thats a bit more complicated though, so left for a future patch. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Nick Piggin <npiggin@gmail.com>
| * GFS2: Use RCU for glock hash tableSteven Whitehouse2011-01-218-297/+190
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This has a number of advantages: - Reduces contention on the hash table lock - Makes the code smaller and simpler - Should speed up glock dumps when under load - Removes ref count changing in examine_bucket - No longer need hash chain lock in glock_put() in common case There are some further changes which this enables and which we may do in the future. One is to look at using SLAB_RCU, and another is to look at using a per-cpu counter for the per-sb glock counter, since that is touched twice in the lifetime of each glock (but only used at umount time). Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2011-03-1624-561/+1660
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: (46 commits) fs/9p: Make the writeback_fid owned by root fs/9p: Writeback dirty data before setattr fs/9p: call vmtruncate before setattr 9p opeation fs/9p: Properly update inode attributes on link fs/9p: Prevent multiple inclusion of same header fs/9p: Workaround vfs rename rehash bug fs/9p: Mark directory inode invalid for many directory inode operations fs/9p: Add . and .. dentry revalidation flag fs/9p: mark inode attribute invalid on rename, unlink and setattr fs/9p: Add support for marking inode attribute invalid fs/9p: Initialize root inode number for dotl fs/9p: Update link count correctly on different file system operations fs/9p: Add drop_inode 9p callback fs/9p: Add direct IO support in cached mode fs/9p: Fix inode i_size update in file_write fs/9p: set default readahead pages in cached mode fs/9p: Move writeback fid to v9fs_inode fs/9p: Add v9fs_inode fs/9p: Don't set stat.st_blocks based on nrpages fs/9p: Add inode hashing ...
| * | fs/9p: Make the writeback_fid owned by rootAneesh Kumar K.V2011-03-151-36/+56
| | | | | | | | | | | | | | | | | | | | | | | | Changes to make sure writeback fid is owned by root Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Writeback dirty data before setattrAneesh Kumar K.V2011-03-152-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | change file attribute can result in making the file readonly. So flush the dirty pages before that. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: call vmtruncate before setattr 9p opeationAneesh Kumar K.V2011-03-152-11/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need to call vmtruncate before 9p setattr operation, otherwise we could write back some dirty pages between setattr with ATTR_SIZE and vmtruncate causing some truncated pages to be written back to server Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Properly update inode attributes on linkAneesh Kumar K.V2011-03-152-10/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With caching enabled, we need to make sure we don't update inode->i_size via stat2inode because we could have dirty data which is not yet written to the server Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Prevent multiple inclusion of same headerAneesh Kumar K.V2011-03-153-3/+11
| | | | | | | | | | | | | | | | | | | | | | | | Add necessary #ifndef #endif blocks to avoid mulitple inclusion of same headers Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Workaround vfs rename rehash bugAneesh Kumar K.V2011-03-151-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is similar to what ceph, ocfs2 and nfs does http://kerneltrap.org/mailarchive/linux-fsdevel/2008/4/18/1498534 May be we should get vfs fixed Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Mark directory inode invalid for many directory inode operationsAneesh Kumar K.V2011-03-152-16/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | One successfull directory operation we would have changed directory inode attribute. So mark them invalid Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add . and .. dentry revalidation flagAneesh Kumar K.V2011-03-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | We need to revalidate . and .. entries also Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: mark inode attribute invalid on rename, unlink and setattrAneesh Kumar K.V2011-03-152-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | rename, unlink and setattr can result in update of inode attribute. So mark the cached copy invalid Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add support for marking inode attribute invalidAneesh Kumar K.V2011-03-155-0/+104
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With cached mode some of the file system operation result in updating inode attributes (ctime). Add support for marking inode attribute invalid in such cases so that we fetch the updated inode attribute on dentry revalidation. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Initialize root inode number for dotlAneesh Kumar K.V2011-03-151-1/+1
| | | | | | | | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Update link count correctly on different file system operationsAneesh Kumar K.V2011-03-152-5/+29
| | | | | | | | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add drop_inode 9p callbackAneesh Kumar K.V2011-03-151-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | We want to immediately drop the inode in non cached mode Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add direct IO support in cached modeAneesh Kumar K.V2011-03-152-6/+116
| | | | | | | | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Fix inode i_size update in file_writeAneesh Kumar K.V2011-03-151-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | Only update inode i_size when we write towards end of file. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: set default readahead pages in cached modeAneesh Kumar K.V2011-03-151-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | We want to enable readahead in cached mode Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Move writeback fid to v9fs_inodeAneesh Kumar K.V2011-03-155-24/+41
| | | | | | | | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add v9fs_inodeAneesh Kumar K.V2011-03-158-220/+184
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switch to the fscache code to v9fs_inode. We will later use v9fs_inode in cache=loose mode to track the inode cache validity timeout. Ie if we find an inode in cache older that a specific jiffie range we will consider it stale Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Don't set stat.st_blocks based on nrpagesAneesh Kumar K.V2011-03-152-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | simple_getattr does set stat.st_blocks to a value derived from nrpages. That is not correct with 9p Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add inode hashingAneesh Kumar K.V2011-03-154-70/+124
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We didn't add the inode to inode hash in 9p. We need to do that to get sync to work, otherwise __mark_inode_dirty will not add the inode to super block's dirty list. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: We need not writeback dirty pages during closeAneesh Kumar K.V2011-03-151-1/+0
| | | | | | | | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Implement syncfs call back for 9PfsAneesh Kumar K.V2011-03-152-9/+25
| | | | | | | | | | | | | | | | | | | | | | | | FIXME!! what about dotu ? Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | net/9p: Implement syncfs 9P operationAneesh Kumar K.V2011-03-153-0/+24
| | | | | | | | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Mark file system with MS_SYNCHRONOUS only if it is not cached modeAneesh Kumar K.V2011-03-151-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | We should not mark file system synchronous if mounted cache=* option Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Clarify cached dentry delete operationAneesh Kumar K.V2011-03-151-9/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | Update the comment to indicate that we don't want to cache negative dentries. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add buffered write support for v9fs.Aneesh Kumar K.V2011-03-152-19/+218
| | | | | | | | | | | | | | | | | | | | | | | | | | | We can now support writeable mmaps. Based on the original patch from Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add fid to inode in cached modeAneesh Kumar K.V2011-03-155-3/+83
| | | | | | | | | | | | | | | | | | | | | | | | | | | The fid attached to inode will be opened O_RDWR mode and is used for dirty page writeback only. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: Add read write helper functionAneesh Kumar K.V2011-03-152-42/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | We add read write helper function here which will be used later by the mmap patch Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: [fscache] wait for page write in cached modeAneesh Kumar K.V2011-03-153-2/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | We need to call fscache_wait_on_page_write in launder_page for fscache Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: increment inode->i_count in cached mode.Aneesh Kumar K.V2011-03-151-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | We need to ihold even in cached mode Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: set fs cache cookie in create path alsoAneesh Kumar K.V2011-03-153-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | We need to call v9fs_cache_inode_set_cookie in create path also Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | fs/9p: set the cached file_operations struct during inode initAneesh Kumar K.V2011-03-153-16/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the old code we were not setting the file->f_op with cached file operations during creat. (format correction by jvrao@linux.vnet.ibm.com) Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * | [net/9p] Small non-IO PDUs for zero-copy supporting transports.Venkateswararao Jujjuri (JV)2011-03-152-7/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a transport prefers payload to be sent separate from the PDU (P9_TRANS_PREF_PAYLOAD_SEP), there is no need to allocate msize PDU buffers(struct p9_fcall). This patch allocates only upto 4k buffers for this kind of transports and there won't be any change to the legacy transports. Hence, this patch on top of zero copy changes allows user to specify higher msizes through the mount option without hogging the kernel heap. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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