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* bitrot/scrub: fix induced throttling in syncop_ftw_throttle()Venky Shankar2015-05-091-12/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Failing to reset scanning counter causes "incorrect" delay of around 50 seconds per directory entry. This causes scrubber to run extremely slowly. [ NOTE: This is a temporary fix. With the introduction of token bucket based throttling, inducing throttle via sleep() call would be unneeded. ] Also, fix logging messages in scrubber to log brick and full path of the object which is identified/marked as corrupted. > Change-Id: Id501bd15dcdbd8a09613f80f9d84050304740027 > BUG: 1170075 > Signed-off-by: Venky Shankar <vshankar@redhat.com> > Reviewed-on: http://review.gluster.org/10375 > Tested-by: NetBSD Build System > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> > Reviewed-by: Gaurav Kumar Garg <ggarg@redhat.com> Change-Id: I78f227f52f12549d62ecb35cbb70121424f7c2a7 BUG: 1220041 Reviewed-on: http://review.gluster.org/10714 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* Revert "bitrot: Scrubber log should report 'bad' file detection as ALERT in log"Raghavendra Bhat2015-05-071-3/+3
| | | | | | | | | This reverts commit 580759939dbcf835cb5293638060e8dbc41c7bea. Change-Id: Ie5018eaa6350279c488f12a933662e7aaadaa907 Reviewed-on: http://review.gluster.org/10643 Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Tested-by: Raghavendra Bhat <raghavendra@redhat.com>
* bitrot: Scrubber log should report 'bad' file detection as ALERT in logGaurav Kumar Garg2015-05-071-3/+3
| | | | | | | | | | | | If scrubber detect any bad object by mismatching of checksum of scrubber and signer then log messages shold come as a Alert instead of warning. Change-Id: I075d80700cbe6182e525a04419a80ab18419ff91 BUG: 1218033 Signed-off-by: Gaurav Kumar Garg <ggarg@redhat.com> Reviewed-on: http://review.gluster.org/10515 Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Tested-by: Raghavendra Bhat <raghavendra@redhat.com>
* features/bitrot: Per volume bitrot translatorGaurav Kumar Garg2015-05-061-0/+20
| | | | | | | | | | | | | | | | | | | | | | Currently whatever bitrot/scrubber tunable value user set for one volume that value is considering for all other volumes also. Each volume should act on their respective bitrot/scrubber tunable value. For handling bitrot/scrubber tunable value independently with respect to all the volume bitrot and scrubber translator should run seperatly for each volume. Change-Id: I1d9379508afe6cfd2f78e3ebf29c829c362d84a9 BUG: 1218048 Signed-off-by: Gaurav Kumar Garg <ggarg@redhat.com> Reviewed-on: http://review.gluster.org/10352 (cherry picked from commit f81deb95db417eeededf7442a30304a880cc8169) Reviewed-on: http://review.gluster.org/10516 Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Kaushal M <kaushal@redhat.com>
* features/bit-rot: Mark versioning fsetxattr as internal fopKotresh HR2015-04-111-5/+9
| | | | | | | | | | | | | | | | | Changelog xlator was capturing bitrot-stub's fsetxattr sent for versioning. Since it was using the same frame as of the create fop, there was inconsistency in fop number and gfid of capturing metadata. So fix is to mark fsetxattr used for versioning as internal and add internal fop filter in changelog_fsetxattr. Change-Id: I51ff468995139838b22bf293a59a0713a92ee7a5 BUG: 1170075 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10148 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/bitrot-stub: Packed format for version xattrVenky Shankar2015-04-091-1/+1
| | | | | | | | | | | | | Using __attribute__ ((__packed__)) for object signature xattr saves some bytes (7 bytes to be particular) occupied by the extended attribute on-disk as compared to the unpacked format. Change-Id: I91a6a0a54aa60e6fd8c357d72f7601b6ed213f2d BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/10161 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* libglusterfs/syncop: Add xdata to all syncop callsRaghavendra Talur2015-04-082-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for xdata in both the request and response path of syncops. Few calls like lookup already had the support; have renamed variables in few places to maintain uniformity. xdata passed downwards is known as xdata_in and xdata passed upwards is known as xdata_out. There is an old patch by Jeff Darcy at http://review.gluster.org/#/c/8769/3 which does the same for some selected calls. It also brings in xdata support at gfapi level. xdata support at gfapi level would be introduced in subsequent patches. Change-Id: I340e94ebaf2a38e160e65bc30732e8fe1c532dcc BUG: 1158621 Signed-off-by: Raghavendra Talur <rtalur@redhat.com> Reviewed-on: http://review.gluster.org/9859 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* features/bitrot-stub: header file update in noinst_HEADERSVenky Shankar2015-04-081-1/+2
| | | | | | | | | | | Missing "bit-rot-object-version.h" causing devrpm failures. Change-Id: I5af326c5871cc468a10dece4772b29eda06c4fa9 BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/10160 Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
* bitrot/scrub: Scrubber fixesVenky Shankar2015-04-085-82/+212
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a handful of problem with scrubber which are detailed below. Scrubber used to skip objects for verification due to missing fd iterface to fetch versioning extended attributes. Similar to the inode interface, an fd based interface in POSIX is now introduced. Moreover, this patch also fixes potential false reporting by scrubber due to: An object gets dirtied and signed when scrubber is busy calculatingobject checksum. This is fixed by caching the signed version when an object is first inspected for stalenes, i.e., during pre-compute stage. This version is used to verify checksum in the post-compute stage when the signatures are compared for possible corruption. Side effect of _not_ sending signature length during signing resulted in "truncated" signature to be set for an object. Now, at the time of signing, the signature length is sent and is used in place of invoking strlen() to get signature length (which could have possible 00s). The signature length itself is not persisted in the signature xattr, but is calculated on-the-fly by substracting the xattr length by the "structure" header size. Some of the log entries are made more meaningful (as and aid for debugging). Change-Id: I938bee5aea6688d5d99eb2640053613af86d6269 BUG: 1207624 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/10118 Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* tests/bitrot-stub: Object versioning test(s)Venky Shankar2015-04-082-16/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces basic object versioning test(s) which is required for bitrot detection to work correctly. Basic test(s) such as opening a file in read-only mode, single open, multiple open()s are covered on FUSE mount _only_ as stub does not support anonymous fds yet. For this reason, the test case disables open-behind. Actual verification is implemented as a C source which makes use of the same on-disk data structures as used by the stub code. The data structures are moved to separate header file which is included by the test script. Such modularization helps in future enhancements to keep the version "data type" opaque and provide handful of APIs version checking (equal/greater/etc..). [ This is just a start and should grow over time as stub is enhanced and codebase matures. ] Change-Id: Ibee20e65a15b56bbdd59fd2703f9305b115aec7a BUG: 1201724 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/10140 Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* features/bitrot-stub: Enhancement to versioning protocolVenky Shankar2015-04-082-57/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | .. and potential bug fixes / memleak. While assigning initial version to an object, both extended attributes (namely, ongoing version and the default signing version) were persisted. This is optimized to just persist the ongoing version along with safe handling of xattr request(s) in it's absence. This is better than the earlier approach as the two xattr sets were not atomic anyway (allowing a request to sneak in between between two set operations). This also allows to perform sanity checks on objects during lookup()/getxattr(): objects with missing ongoing version but presence of signature are possible candidates of tampering (and catching implementation bugs). There were couple of instances in the code where versioning xattrs were incorrectly removed before in-memory versions were initialized, which have been fixed with this patch. A memory leak in the IPC code path is also fixed. Change-Id: I01c690ccfe7156a883582275f40f79a7c10c0900 BUG: 1207054 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/10117 Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* Avoid conflict between contrib/uuid and system uuidEmmanuel Dreyfus2015-04-042-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* features/bit-rot: fix CID 1124725 - use after freeMichael Adam2015-04-021-4/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | Coverity fixes: CID 1124725 CID 1291742 The problem is that gf_tw_cleanup_timers() frees the handed in priv->timer_wheel but it can not set the pointer to NULL, so subsequent checks for priv->timer_wheel show it as not NULL and allow for access after free. The proper change might be to change gf_tw_cleanup_timers() to take a reference to the pointer and set it to NULL after free, but since it is under contrib/, I did not want to change that function. Instead this patch uses the function's return code which was not used previously. (Maybe this should even be done in a wrapper macro or function?) Change-Id: I31d80d3df2e4dc7503d62c7819429e1a388fdfdd BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10056 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/bit-rot: fix assignment instead of check (Coverity fix)Michael Adam2015-04-011-1/+1
| | | | | | | | | | | | | Fixes Coverity CIDs 1291728, 1291723, 1291732. Change-Id: I62f3d540cac0f555fe2839b8418e59691c3ff4fd BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10055 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra Talur <rtalur@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/bit-rot: filesystem scrubberVenky Shankar2015-03-246-61/+502
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Scrubber performs signature verification for objects that were signed by signer. This is done by recalculating the signature (using the hash algorithm the object was signed with) and verifying it aginst the objects persisted signature. Since the object could be undergoing IO opretaion at the time of hash calculation, the signature may not match objects persisted signature. Bitrot stub provides additional information about the stalesness of an objects signature (determinted by it's versioning mechanism). This additional bit of information is used by scrubber to determine the staleness of the signature, and in such cases the object is skipped verification (although signature staleness is performed twice: once before initiation of hash calculation and another after it (an object could be modified after staleness checks). The implmentation is a part of the bitrot xlator (signer) which acts as a signer or scrubber based on a translator option. As of now the scrub process is ever running (but has some form of weak throttling mechanism during filesystem scan). Going forward, there needs to be some form of scrub scheduling and IO throttling (during hash calculation) tunables (via CLI). Change-Id: I665ce90208f6074b98c5a1dd841ce776627cc6f9 BUG: 1170075 Original-Author: Raghavendra Bhat <rabhat@redhat.com> Original-Author: Venky Shankar <vshankar@redhat.com> Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9914 Tested-by: Vijay Bellur <vbellur@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* features/bit-rot: Implementation of bit-rot xlatorVenky Shankar2015-03-249-170/+1506
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the "Signer" -- responsible for signing files with their checksums upon last file descriptor close (last release()). The event notification facility provided by the changelog xlator is made use of. Moreover, checksums are as of now SHA256 hash of the object data and is the only available hash at this point of time. Therefore, there is no special "what hash to use" type check, although it's does not take much to add various hashing algorithms to sign objects with. Signatures are stored in extended attributes of the objects along with the the type of hashing used to calculate the signature. This makes thing future proof when other hash types are added. The signature infrastructure is provided by bitrot stub: a little piece of code that sits over the POSIX xlator providing interfaces to "get or set" objects signature and it's staleness. Since objects are signed upon receiving release() notification, pre-existing data which are "never" modified would never be signed. To counter this, an initial crawler thread is spawned The crawler scans the entire brick for objects that are unsigned or "missed" signing due to the server going offline (node reboots, crashes, etc..) and triggers an explicit sign. This would also sign objects when bit-rot is enabled for a volume and/or after upgrade. Change-Id: I1d9a98bee6cad1c39c35c53c8fb0fc4bad2bf67b BUG: 1170075 Original-Author: Raghavendra Bhat <raghavendra@redhat.com> Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9711 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* mgmt/glusterd: generate volfile for BitDVenky Shankar2015-03-244-0/+163
| | | | | | | | | | | | | | * Implement the skeleton of bit-rot xlator. Original-Author: Raghavendra Bhat <raghavendra@redhat.com> Signed-off-by: Venky Shankar <vshankar@redhat.com> Signed-off-by: Gaurav Kumar Garg <ggarg@redhat.com> Signed-off-by: Anand Nekkunti <anekkunt@redhat.com> Change-Id: If33218bdc694f5f09cb7b8097c4fdb74d7a23b2d BUG: 1170075 Reviewed-on: http://review.gluster.org/9710 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
* Bitrot StubVenky Shankar2015-03-247-0/+1905
Bitrot stub implements object versioning required for identifying signature freshness. More details about versioning is explained as a part of the "bitrot feature documentation" patch. Change-Id: I2ad70d9eb109ba4a12148ab8d81336afda529ad9 BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9709 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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