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* cluster/ec: Minimize usage of EIO errorXavier Hernandez2015-08-081-137/+115
| | | | | | | | | | | | | | | | | | >Change-Id: I82e245615419c2006a2d1b5e94ff0908d2f5e891 >BUG: 1245276 >Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> >Reviewed-on: http://review.gluster.org/11741 >Tested-by: Gluster Build System <jenkins@build.gluster.com> >Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> >Tested-by: NetBSD Build System <jenkins@build.gluster.org> Change-Id: Ifd3d63f88a686a2963c5ba2e62110249f84f338d BUG: 1250864 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/11852 Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* cluster/ec: wind fops on good subvols for access/readdir[p]Pranith Kumar K2015-07-011-11/+1
| | | | | | | | | | | Backport of http://review.gluster.com/11246 BUG: 1234679 Change-Id: I2d774f62740c82e922efab50fc78fa74050ede93 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/11357 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* ec: Porting messages to new logging frameworkNandaja Varma2015-06-271-31/+45
| | | | | | | | | | | | | | | | | This is a backport of http://review.gluster.org/#/c/10465/ cherry-picked from commit b0b9eaea9dbb4e9a535f5e969defc4556a9e2204 >Change-Id: Ia05ae750a245a37d48978e5f37b52f4fb0507a8c >BUG: 1194640 >Signed-off-by: Nandaja Varma <nandaja.varma@gmail.com> Change-Id: Ia05ae750a245a37d48978e5f37b52f4fb0507a8c BUG: 1217722 Signed-off-by: Nandaja Varma <nandaja.varma@gmail.com> Reviewed-on: http://review.gluster.org/11429 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/dht: Fix dht_setxattr to follow files under migrationNithya Balachandran2015-06-041-0/+1
| | | | | | | | | | | | | | | | If a file is under migration, then any xattrs created on it are lost post migration of the file. This is because the xattrs are set only on the cached subvol of the source and as the source is under migration, it becomes a linkto file post migration. Change-Id: Ib8e233b519cf954e7723c6e26b38fa8f9b8c85c0 BUG: 1225839 Signed-off-by: Nithya Balachandran <nbalacha@redhat.com> Reviewed-on: http://review.gluster.org/10968 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com> Tested-by: Raghavendra G <rgowdapp@redhat.com>
* cluster/ec: Fix incorrect check for iatt differencesXavier Hernandez2015-06-031-5/+19
| | | | | | | | | | | | | | | | | | | | | Backport of http://review.gluster.org/11018 A previous patch (http://review.gluster.org/10974) introduced a bug that caused that some metadata differences could not be detected in some circumstances. This could cause that self-heal is not triggered and the file not repaired. We also need to consider all differences for lookup requests, even if there isn't any lock. Special handling of differences in lookup is already done in lookup specific code. Change-Id: I88e3678634d848a89f428a37209c31464e42cf8b BUG: 1225796 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/11027 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/ec: Ignore differences in non locked inodesXavier Hernandez2015-05-301-10/+65
| | | | | | | | | | | | | | | | | | | | | | | | | Backport of http://review.gluster.org/10974 When ec combines iatt structures from multiple bricks, it checks for equality in important fields. This is ok for iatt related to inodes involved in the operation that have been locked before starting execution. However some fops return iatt information from other inodes. For example a rename locks source and destination parent directories, but it also returns an iatt from the entry itself. In these cases we ignore differences in some fields to avoid false detection of inconsistencies and trigger unnecessary self-heals. Another issue is solved in this patch that caused that the real size of the file stored into the inode context was lost during self-heal. BUG: 1225796 Change-Id: I29f328a7b4895368ded859f3bae0359436c3588f Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/10983 Tested-by: Gluster Build System <jenkins@build.gluster.com>
* cluster/ec: Fix all EIO errors in ECPranith Kumar K2015-05-281-19/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Backport of http://review.gluster.org/10770 Backport of http://review.gluster.org/10806 Backport of http://review.gluster.org/10787 Backport of http://review.gluster.org/10868 Backport of http://review.gluster.com/10852 - When a blocking lock is requested, lock request is succeeded even when ec->fragment number of locks are acquired successfully in non-blocking locking phase. This will lead to fop succeeding only on the bricks where the locks are acquired, leading to the necessity of self-heals. To prevent these un-necessary self-heals, if the remaining locks fail with EAGAIN in non-blocking lock phase try blocking locking phase instead. - Handle lookup failures while op in progress - cluster/ec: Correctly cleanup delayed locks When a delayed lock is pending, a graph switch doesn't correctly terminate it. This means that the update of version and size xattrs is lost, causing EIO errors. This patch handles GF_EVENT_PARENT_DOWN event to correctly finish pending udpdates before completing the graph switch. - Fix use after free crash ec_heal creates ec_fop_data but doesn't run ec_manager. ec_fop_data_allocate adds this fop to ec->pending_fops, because ec_manager is not run on this heal fop it is never removed from ec->pending_fops. When it is accessed after free it leads to crash. It is better to not to add HEAL fops to ec->pending_fops because we don't want graph switch to hang the mount because of a BIG file/directory heal. - Forced unlock when lock contention is detected EC uses an eager lock mechanism to optimize multiple read/write requests on the same entry or inode. This increases performance but can have adverse results when other clients try to access the same entry/inode. To solve this, this patch adds a functionality to detect when this happens and force an earlier release to not block other clients. The method consists on requesting GF_GLUSTERFS_INODELK_COUNT and GF_GLUSTERFS_ENTRYLK_COUNT for all fops that take a lock. When this count is greater than one, the lock is marked to be released. All fops already waiting for this lock will be executed normally before releasing the lock, but new requests that also require it will be blocked and restarted after the lock has been released and reacquired again. Another problem was that some operations did correctly lock the parent of an entry when needed, but got the size and version xattrs from the entry instead of the parent. This patch solves this problem by binding all queries of size and version to each lock and replacing all entrylk calls by inodelk ones to remove concurrent updates on directory metadata. This also allows rename to correctly update source and destination directories. BUG: 1225279 Change-Id: I02a6084b138dd38e018a462347cd9ce38610c7ef Reviewed-on: http://review.gluster.org/10926 Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/ec: Fix dictionary compare functionPranith Kumar K2015-05-081-82/+26
| | | | | | | | | | | | | | | | | | | | | If both dicts are NULL then equal. If one of the dicts is NULL but the other has only ignorable keys then also they are equal. If both dicts are non-null then check if for each non-ignorable key, values are same or not. value_ignore function is used to skip comparing values for the keys which must be present in both the dictionaries but the value could be different. geo-rep's stime xattr doesn't need to be present in list xattr but when getxattr comes on stime xattr even if there aren't enough responses with the xattr we should still give out an answer which is maximum of the stimes available. Change-Id: I8de2ceaa2db785b797f302f585d88e73b154167d BUG: 1216303 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/10078 Reviewed-on: http://review.gluster.org/10690 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System
* quota/disperse: handle inode quotas in xattr aggregatevmallika2015-04-141-13/+22
| | | | | | | | | | | | | | | | | | | | with the inode quota feature, quota size is now increased from 64bit to 192bits which contains values of 'file size', 'file count' and 'dir count' This change in quota size xattr needs to be handled in disperse xattr aggregation Signed-off-by: vmallika <vmallika@redhat.com> Change-Id: I5fd28aa9f5b8b6cba83a98360236417a97ac16ee BUG: 1207967 Reviewed-on: http://review.gluster.org/10112 Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Sachin Pandit <spandit@redhat.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com> Tested-by: Raghavendra G <rgowdapp@redhat.com>
* cluster/ec: Ignore volume-mark key for comparing dictsPranith Kumar K2015-04-101-0/+1
| | | | | | | | | Change-Id: Id60107e9fb96588d24fa2f3be85c764b7f08e3d1 BUG: 1207712 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/10077 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
* cluster/ec: Refactor inode-writevPranith Kumar K2015-04-061-0/+54
| | | | | | | | | | | | | | All _cbk() functions in inode-write.c do same things, i.e. store op_ret/op_errno, stat structures if they are available and combine them. Moved this common operation into one function ec_inode_write_cbk() and made all the other _cbk() functions to use this instead. Change-Id: I2387b9f2d9598ced6299a26ea1900e9deb9fadc4 BUG: 1199767 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/9981 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com>
* Avoid conflict between contrib/uuid and system uuidEmmanuel Dreyfus2015-04-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | glusterfs relies on Linux uuid implementation, which API is incompatible with most other systems's uuid. As a result, libglusterfs has to embed contrib/uuid, which is the Linux implementation, on non Linux systems. This implementation is incompatible with systtem's built in, but the symbols have the same names. Usually this is not a problem because when we link with -lglusterfs, libc's symbols are trumped. However there is a problem when a program not linked with -lglusterfs will dlopen() glusterfs component. In such a case, libc's uuid implementation is already loaded in the calling program, and it will be used instead of libglusterfs's implementation, causing crashes. A possible workaround is to use pre-load libglusterfs in the calling program (using LD_PRELOAD on NetBSD for instance), but such a mechanism is not portable, nor is it flexible. A much better approach is to rename libglusterfs's uuid_* functions to gf_uuid_* to avoid any possible conflict. This is what this change attempts. BUG: 1206587 Change-Id: I9ccd3e13afed1c7fc18508e92c7beb0f5d49f31a Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org> Reviewed-on: http://review.gluster.org/10017 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* cluster/ec: Refactor ec-dir-writePranith Kumar K2015-03-241-43/+45
| | | | | | | | | | | | - Also fixed iatt_combine to go over all the valid iatts Change-Id: I1d52d705ed0437f602357acde3e479cedb748681 BUG: 1199767 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/9827 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Don't use inodelk on getxattr when clearing locksXavier Hernandez2015-01-181-1/+1
| | | | | | | | | | | | | | | | | | | | When command 'clear-locks' from cli is executed, a getxattr request is received by ec. This request was handled as usual, first locking the inode. Once this request was processed by the bricks, all locks were removed, including the lock used by ec. When ec tried to unlock the previously acquired lock (which was already released), caused a crash in glusterfsd. This fix executes the getxattr request without any lock acquired for the clear-locks command. Change-Id: I77e550d13c4673d2468a1e13fe6e2fed20e233c6 BUG: 1179050 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/9440 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* ec: Fix more mutex related coverity scan issuesXavier Hernandez2014-12-171-9/+5
| | | | | | | | | | | This patch solves CID 1257622. Change-Id: I95680c7de49cd84011d2ad38f02e5fad82e15c90 BUG: 1170254 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/9263 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com>
* ec: Change licenseXavier Hernandez2014-12-031-16/+6
| | | | | | | | | | Change-Id: Iae90ade2421898417b53dec0417a610cf306c44b BUG: 1168167 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/9201 Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Correctly handle quota xattrsXavier Hernandez2014-11-121-0/+53
| | | | | | | | | Change-Id: I35e11d83c318210d44b918e847cf13db35b01510 BUG: 1158008 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8990 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* ec: Correctly handle xtime extended attributeXavier Hernandez2014-10-281-2/+39
| | | | | | | | | | Change-Id: I2bd34f063d6bf1835d5ae57a8e9aa03f3ec3deb3 BUG: 1156404 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8972 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Fix rebalance issuesXavier Hernandez2014-10-271-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some issues in ec xlator made that rebalance didn't complete successfully and generated some warnings and errors in the log. The most critical error was a race condition that caused false corruption detection when two specific operations were executed sequentially and they shared the same lock. This explains the problem: 1. A setxattr is issued. 2. setxattr: ec locks the inode before updating the xattr. 3. setxattr: The xattr is updated. 4. setxattr: Upper xlator is notified that the operation completed. 5. setxattr: A background task is initiated to update the version of the file. 6. A stat is issued on the same file. 7. stat: Since the lock is already acquired, it's reused. 8. stat: A lookup is issued to determine version and size information of the file. At this point, operations 5 and 8 can interfere. This can make that lookup sees different information on each brick, determining that some bricks are corrupted and incorrectly excluding them from the operation and initiating a self-heal. In some cases this false detection combined with self-heal could lead to invalid updates of the trusted.ec.size xattr, leaving the file smaller than it should be. This only happens if the first operation does not perform a lookup, because chained operations reuse the information returned by the previous one, avoiding this kind of problems. To solve this, now the background update is executed atomically with the posterior unlock. This avoids some reuses of the lock while updating. However this reduces performance because the window in which new requests can reuse the lock is much smaller now. This has been alleviated by using the same technique implemented in AFR (i.e. waiting some time before releasing the lock). Some minor changes also introduced in this patch: * Bug in management of 'trusted.glusterfs.pathinfo' that was writing beyond the allocated space. * Uninitialized variable. * trusted.ec.config was not created for regular files created with mknod. * An invalid state was used in access fop. Change-Id: Idfaf69578ed04dbac97a62710326729715b9b395 BUG: 1152902 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8947 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Fix some size_t vars to 64 bits even on 32 bits machinesXavier Hernandez2014-09-191-4/+3
| | | | | | | | | | | | | | | | The 64 bits 'trusted.ec.size' extended attribute was incorrectly computed on 32 bits machines due to an overflow on negative numbers. Also changed some potentially dangerous uses of size_t in other places. Change-Id: Id76cfe49a2f350e564b5c71d8c8644fb9ce86662 BUG: 1125312 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8738 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Optimize read/write performanceXavier Hernandez2014-09-151-4/+4
| | | | | | | | | | | | | | | | | | This patch significantly improves performance of read/write operations on a dispersed volume by reusing previous inodelk/ entrylk operations on the same inode/entry. This reduces the latency of each individual operation considerably. Inode version and size are also updated when needed instead of on each request. This gives an additional boost. Change-Id: I4b98d5508c86b53032e16e295f72a3f83fd8fcac BUG: 1122586 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8369 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com>
* ec: Fixed coveriry scan issuesXavier Hernandez2014-07-211-3/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CID list: 1226163 Logically dead code 1226166 Missing break in switch 1226167 Missing break in switch 1226168 Missing break in switch 1226169 Missing break in switch 1226170 Missing break in switch 1226171 Missing break in switch 1226172 Missing break in switch 1226173 Missing break in switch 1226174 Missing break in switch 1226175 Missing break in switch 1226176 Missing break in switch 1226177 Missing break in switch 1226178 Data race condition 1226179 Data race condition 1226180 Data race condition 1226181 Thread deadlock 1226182 Uninitialized pointer read 1226183 Uninitialized pointer read 1226184 Read from pointer after free Change-Id: I4d33aa42289371927175c43bb29e018df64fb943 BUG: 789278 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8317 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* cluster/ec: Added erasure code translatorXavier Hernandez2014-07-111-0/+787
Change-Id: I293917501d5c2ca4cdc6303df30cf0b568cea361 BUG: 1118629 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/7749 Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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