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* cluster/ec: fix fd reopenXavi Hernandez2019-04-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently EC tries to reopen fd's that have been opened while a brick was down. This is done as part of regular write operations, just after having acquired the locks, and it's sent as a sub-fop of the main write fop. There were two problems: 1. The reopen was attempted on all UP bricks, even if a previous lock didn't succeed. This is incorrect because most probably the open will fail. 2. If reopen is sent and fails, the error is propagated to the main operation, causing it to fail when it shouldn't. To fix this, we only attempt reopens on bricks where the current fop owns a lock, and we prevent any error to be propagated to the main fop. To implement this behaviour an argument used to indicate the minimum number of required answers has overloaded to also include some flags. To make the change consistent, it has been necessary to rename the argument, which means that a lot of files have been changed. However there are no functional changes. This change has also uncovered a problem in discard code, which didn't correctely process requests of small sizes because no real discard fop was being processed, only a write of 0's on some region. In this case some fields of the fop remained uninitialized or with incorrect values. To fix this, a new function has been created to simulate success on a fop and it's used in the discard case. Thanks to Pranith for providing a test script that has also detected an issue in this patch. This patch includes a small modification of this script to force data to be written into bricks before stopping them. Change-Id: If272343873369186c2fb8f43c1d9c52c3ea304ec Fixes: bz#1699866 Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
* Land clang-format changesGluster Ant2018-09-121-13/+16
| | | | Change-Id: I6f5d8140a06f3c1b2d196849299f8d483028d33b
* cluster/ec: Add support for hardware accelerationXavier Hernandez2016-09-081-306/+3
| | | | | | | | | | | | | | | | | | | | | | | This patch implements functionalities for fast encoding/decoding using hardware support. Currently optimized x86_64, SSE and AVX is added. Additionally this patch implements a caching mecanism for inverse matrices to reduce computation time, as well as a new method for computing the inverse that takes quadratic time instead of cubic. Finally some unnecessary memory copies have been eliminated to further increase performance. Change-Id: I26c75f26fb4201bd22b51335448ea4357235065a BUG: 1289922 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/12837 Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Smoke: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/ec: Fix issues with eager lockingXavier Hernandez2016-05-021-7/+18
| | | | | | | | | | | | | | | | | | Due to a race in timer cancellation, in some cases it was possible to unlock the lock while another concurrent fop that needed it continues execution as if it were not released. This patch also fixes an issue that caused a lock to not be released if an error was found while preparing ec_update_size_version(). Change-Id: I1344a3f5ecfc333f05a09e62653838264c9c26b1 BUG: 1331254 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/14112 Smoke: Gluster Build System <jenkins@build.gluster.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Chen Chen <chenchen@smartquerier.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
* cluster/ec: add seek() FOPXavier Hernandez2016-02-051-0/+4
| | | | | | | | | | | | BUG: 1220173 Change-Id: Iaa23ba81df4ee78ddaab1f96b3d926a563b4bb3d Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/11494 Smoke: Gluster Build System <jenkins@build.gluster.com> Tested-by: Niels de Vos <ndevos@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
* cluster/ec: Mark internal fops appropriatelyXavier Hernandez2015-11-191-0/+3
| | | | | | | | | | | | | 1) Mark read fops in read-modify-write by EC as internal. 2) Handle uid/gid set/reset correctly BUG: 1282761 Change-Id: I5c1ce0cd6213367eaead5fed33aa2397c4e46df7 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/12599 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/ec: Fix bad management of lock ownersXavier Hernandez2015-11-051-1/+1
| | | | | | | | | | | | | | | | | | | | Since the addition of parallel reads patch for ec, a lock can have more than one owner at the same time. The list of owners was stored inside the 'owner_list' field of each fop. The problem was with fops that required more than one lock (like rename). In this case the same field was used to add the fop to more than one list, casing an overwrite of the previous list. This has been solved moving the 'owner_list' field from ec_fop_data_t to ec_lock_link_t structure. Change-Id: I6042129f09082497b80782b5704a52c35c78f44d BUG: 1276031 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/12445 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
* cluster/ec : Mark new entry changelog in entry self-healAshish Pandey2015-10-061-1/+1
| | | | | | | | | | | | | | | | | | | | Problem : When a new entry is created dirty mark xattrs are not created this will need full heal to be performed, even when there are partial failures. Solution : Marks new entry changelog in self-heal. PS: Also fixed erasing of dirty markers when no data heal is required. BUG: 1254121 Signed-off-by: Ashish Pandey <aspandey@redhat.com> Change-Id: I156e3d3201afa77efe118e1aaace1d91c90a9613 Reviewed-on: http://review.gluster.org/11938 Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
* cluster/ec: Allow read fops to be processed in parallelXavier Hernandez2015-08-291-1/+4
| | | | | | | | | | | | | | Currently ec only sends a single read request at a time for a given inode. Since reads do not interfere between them, this patch allows multiple concurrent read requests to be sent in parallel. Change-Id: If853430482a71767823f39ea70ff89797019d46b BUG: 1245689 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/11742 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* cluster/ec: Fix write size in self-healXavier Hernandez2015-08-141-0/+1
| | | | | | | | | | | | | | | | | | Self-heal was always using a fixed block size to heal a file. This was incorrect for dispersed volumes with a number of data bricks not being a power of 2. This patch adjusts the block size to a multiple of the stripe size of the volume. It also propagates errors detected during the data heal to stop healing the file and not mark it as healed. Change-Id: I9ee3fde98a9e5d6116fd096ceef88686fd1d28e2 BUG: 1251446 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/11862 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: Fix tracking of good bricksXavier Hernandez2015-08-061-3/+0
| | | | | | | | | | | | | | | | | | | The bitmask of good and bad bricks was kept in the context of the corresponding inode or fd. This was problematic when an external process (another client or the self-heal process) did heal the bricks but no one changed the bitmaks of other clients. This patch removes the bitmask stored in the context and calculates which bricks are healthy after locking them and doing the initial xattrop. After that, it's updated using the result of each fop. Change-Id: I225e31cd219a12af4ca58871d8a4bb6f742b223c BUG: 1236065 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/11844 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: wind readlink on good subvol(s)Pranith Kumar K2015-07-141-1/+2
| | | | | | | | | | BUG: 1232172 Change-Id: I3a56e487840d86147dd85bf5fbe79b165eae289f Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/11589 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* cluster/ec: Prevent data corruptionsPranith Kumar K2015-07-141-0/+1
| | | | | | | | | | | | | | - On lock reuse preserve 'healing' bits - Don't set ctx->size outside locks in healing code - Allow xattrop internal fops also on the fop->mask. Change-Id: I6b76da5d7ebe367d8f3552cbf9fd18e556f2a171 BUG: 1232678 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/11640 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
* cluster/ec: Add throttling in background healingPranith Kumar K2015-07-011-0/+1
| | | | | | | | | | | | | | - 8 parallel heals can happen. - 128 heals will wait for their turn - Heals will be rejected if 128 heals are already waiting. Change-Id: I2e99bf064db7bce71838ed9901a59ffd565ac390 BUG: 1237381 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/11471 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
* cluster/ec: wind fops on good subvols for access/readdir[p]Pranith Kumar K2015-06-261-0/+1
| | | | | | | | | Change-Id: I1e629a6adc803c4b7164a5a7a81ee5cb1d0e139c BUG: 1232172 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/11246 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
* cluster/ec: Don't handle EC_XATTR_DIRTY in responsePranith Kumar K2015-06-061-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Problem: ec_update_size_version expects all the keys it did xattrop with to come in response so that it can set the values again in ec_update_size_version_done. But EC_XATTR_DIRTY is not combined so the value won't be present in the response. So ctx->post/pre_dirty are not updated in ec_update_size_version_done. So these values are still non-zero. When ec_unlock_now is called as part of flush's unlock phase it again tries to perform same xattrop for EC_XATTR_DIRTY. But ec_update_size_version is not expected to be called in unlock phase of flush because ec_flush_size_version should have reset everything to zero and unlock is never invoked from ec_update_size_version_done for flush/fsync/fsyncdir. This leads to stale lock which leads to hang. Fix: EC_XATTR_DIRTY is removed in ex_xattrop_cbk and is never combined with other answers. So remove handling of this in the response. Change-Id: If0ea3efec3235a6e312465d8838585fbe752c7ea BUG: 1227654 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/11078 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* cluster/ec: Forced unlock when lock contention is detectedXavier Hernandez2015-05-271-21/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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. Change-Id: I2df0b22bc6f407d49f3cbf0733b0720015bacfbd BUG: 1165041 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/10852 Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/ec: Correctly cleanup delayed locksXavier Hernandez2015-05-201-15/+16
| | | | | | | | | | | | | | | | | 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. Change-Id: I394f3b8d41df8d83cdd36636aeb62330f30a66d5 BUG: 1188145 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/10787 Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/ec: Change meaning of trusted.ec.dirtyPranith Kumar K2015-05-081-2/+3
| | | | | | | | | | | | | | | | - With this change, the xattr will represent if the file needs to be healed or not. It will have different values for data/entry and metadata changes. - inode ref leaks and dict_set_dynstr related leaks fixed - Added support for trylock/lock based on heal-cmd execution or not in data heal. - Made fixes to pass regression runs Change-Id: I9d8def4c2badde18a76b7898816fecfac113737a BUG: 1215265 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/10385 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* cluster/ec: add separate versions for data/entry, metadataAshish Pandey2015-05-061-4/+4
| | | | | | | | | | | | | | | | | | | Adding 64 bits in "version" key of extended attributes. First 64 bits (Left) represents Data version. Last 64 bits (right) represents Meta Data version. Note: 3.7 and 3.6 version ec can't co-exist with this change because xattrop in 3.6 will fail with ERANGE as the buffer passed to it will be '8' bytes where as the value will be 16 bytes in 3.7. Where as 3.7 version clients can work with old version files. For upgrades we need to tell users to complete heals and then upgrade BUG: 1215265 Change-Id: Ib85114680cb7e75b8371c984d9f7b6401c1ffb93 Signed-off-by: Ashish Pandey <aspandey@redhat.com> Reviewed-on: http://review.gluster.org/10312 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* cluster/ec: Perform inode-write on healing subvolsPranith Kumar K2015-04-241-0/+3
| | | | | | | | | | | | | | | | | | If the version numbers do not match, then writes are performed only on at least N-R bricks which have same version. But if we want to do healing of files which are constantly modified we need to allow writes on subvols that are undergoing heal. Data healing will mark 62nd bit while the heal is going on. When the data transaction sees that this bit is set it needs to perform the fop on that subvol irrespective of whether the versions match or do not match. Fop is considered successful only if N-R non-healing bricks succeed. Change-Id: I69a17582df397aaf6e8ca4b5e746c7ca802cbbde BUG: 1215265 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/10372 Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* cluster/ec: Allow heal on name less locPranith Kumar K2015-03-051-0/+1
| | | | | | | | | | | | loc->parent may not always be populated. Even in those cases, self-heal should happen if it can be completed using nameless loc. Change-Id: I8871fc811bec8b881ae7fb09dcd202c6693b9877 BUG: 1177601 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/9717 Reviewed-by: Xavier Hernandez <xhernandez@datalab.es> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* ec: Add trusted.ec.dirty xattrXavier Hernandez2015-02-231-0/+2
| | | | | | | | | | | | | | | | | This xattr will be incremented before each data modifying operation and decremented after it. This will add the possibility to detect partially updated writes and refuse them on reads. It will also be useful for interacting with index xlator and have a way to heal dispersed files from the self-heal daemon. Change-Id: Ie644a8dd074ae0f254c809c5863bdb030be5486a BUG: 1190581 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/9607 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Fix self-healing issues.Xavier Hernandez2014-12-041-23/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three problems have been detected: 1. Self healing is executed in background, allowing the fop that detected the problem to continue without blocks nor delays. While this is quite interesting to avoid unnecessary delays, it can cause spurious failures of self-heal because it may try to recover a file inside a directory that a previous self-heal has not recovered yet, causing the file self-heal to fail. 2. When a partial self-heal is being executed on a directory, if a full self-heal is attempted, it won't be executed because another self-heal is already in process, so the directory won't be fully repaired. 3. Information contained in loc's of some fop's is not enough to do a complete self-heal. To solve these problems, I've made some changes: * Improved ec_loc_from_loc() to add all available information to a loc. * Before healing an entry, it's parent is checked and partially healed if necessary to avoid failures. * All heal requests received for the same inode while another self-heal is being processed are queued. When the first heal completes, all pending requests are answered using the results of the first heal (without full execution), unless the first heal was a partial heal. In this case all partial heals are answered, and the first full heal is processed normally. * An special virtual xattr (not physically stored on bricks) named 'trusted.ec.heal' has been created to allow synchronous self-heal of files. Now, the recommended way to heal an entire volume is this: find <mount> -d -exec getfattr -h -n trusted.ec.heal {} \; Some minor changes: * ec_loc_prepare() has been renamed to ec_loc_update(). * All loc management functions return 0 on success and -1 on error. * Do not delay fop unlocks if heal is needed. * Added basic ec xattrs initially on create, mkdir and mknod fops. * Some coding style changes Change-Id: I2a5fd9c57349a153710880d6ac4b1fa0c1475985 BUG: 1161588 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/9072 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: Fix rebalance issuesXavier Hernandez2014-10-271-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 self-heal issuesXavier Hernandez2014-10-211-23/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: Doing an 'ls' of a directory that has been modified while one of the bricks was down, sometimes returns the old directory contents. Cause: Directories are not marked when they are modified as files are. The ec xlator balances requests amongst available and healthy bricks. Since there is no way to detect that a directory is out of date in one of the bricks, it is used from time to time to return the directory contents. Solution: Basically the solution consists in use versioning information also for directories, however some additional changes have been necessary. Changes: * Use directory versioning: This required to lock full directory instead of a single entry for all requests that add or remove entries from it. This is needed to allow atomic version update. This affects the following fops: create, mkdir, mknod, link, symlink, rename, unlink, rmdir Another side effect is that opendir requires to do a previous lookup to get versioning information and discard out of date bricks for subsequent readdir(p) calls. * Restrict directory self-heal: Till now, when one discrepancy was found in lookup, a self-heal was automatically started. This caused the versioning information of a bad directory to be healed instantly, making the original problem to reapear again. To solve this, when a missing directory is detected in one or more bricks on lookup or opendir fops, only a partial self-heal is performed on it. A partial self-heal basically creates the directory but does not restore any additional information. This avoids that an 'ls' could repair the directory and cause the problem to happen again. With this change, output of 'ls' is always consistent. However, since the directory has been created in the brick, this allows any other operation on it (create new files, for example) to succeed on all bricks and not add additional work to the self-heal process. To force a self-heal of a directory, any other operation must be done on it. For example a getxattr. With these changes, the correct healing procedure that would avoid inconsistent directory browsing consists on a post-order traversal of directoriesi being healed. This way, the directory contents will be healed before healing the directory itslef. * Additional changes to fix self-heal errors - Don't use fop->fd to decide between fd/loc. open, opendir and create have an fd, but the correct data is in loc. - Fix incorrect management of bad bricks per inode/fd. - Fix incorrect selection of fop's target bricks when there are bad bricks involved. - Improved ec_loc_parent() to always return a parent loc as complete as possible. Change-Id: Iaf3df174d7857da57d4a87b4a8740a7048b366ad BUG: 1149726 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8916 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* ec: Fix 32 bits issues on file size calculationXavier Hernandez2014-10-201-2/+2
| | | | | | | | | | | | | | Some additional 32 bits issues have been added by a recent patch. This patch solves it. Change-Id: Ice81032fbe8e36e5ccad19a781b7876891993906 BUG: 1146903 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8882 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Emmanuel Dreyfus <manu@netbsd.org> Tested-by: Emmanuel Dreyfus <manu@netbsd.org> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Fix incorrect management of healed bricksXavier Hernandez2014-10-201-0/+1
| | | | | | | | | | | | | | | | | | The final lookup made to restore final file attributes after a self-heal did clear the mask of bad bricks, causing that the final setattr won't modify any brick at all. This caused that some attriutes, specially the modification time of the file didn't get updated properly. Now the mask of healed bricks is saved before doing the last lookup. It's also used to correctly report the repaired bricks. Change-Id: Ib94083c9e1b562515dfb54f9574120f1f031dccc BUG: 1149723 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8905 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* ec: Add config information in an xattrXavier Hernandez2014-09-231-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | To simplify backward compatibility of the ec xlator when some parameter or the implementation itself is changed, a new xattr is added to each file with the configuration needed to recover it. The new attribute is called 'trusted.ec.config', and it's a 64-bit value containing the following information: 8 bits: version of the config information (currently always 0) 8 bits: algorithm used to encode the file (currently always 0) 8 bits: size of the galois field (currently always 8) 8 bits: number of bricks 8 bits: redundancy 24 bits: chunk size (currently 512) This new xattr could allow, in a future version, to have different configurations per file. Change-Id: I8c12d40ff546cc201fc66caa367484be3d48aeb4 BUG: 1140861 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8770 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 some size_t vars to 64 bits even on 32 bits machinesXavier Hernandez2014-09-191-9/+9
| | | | | | | | | | | | | | | | 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 Hernandez2014-09-151-3/+28
| | | | | | | | | | | | | | | | | | 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>
* cluster/ec: Added erasure code translatorXavier Hernandez2014-07-111-0/+260
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>
generated by cgit (git 2.34.1) at 2024-04-30 22:58:50 +0000