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* gfapi: glfs_subvol_done should NOT wait for graph migration.Rajesh Joseph2017-01-021-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In graph_setup function glfs_subvol_done is called which is executed in an epoll thread. glfs_lock waits on other thread to finish graph migration. This can lead to dead lock if we consume all the epoll threads. In general any call-back function executed in epoll thread should not call any blocking call which waits on a network reply either directly or indirectly, e.g. syncop functions should not be called in these threads. As a fix we should not wait for migration in the call-back path. > Reviewed-on: http://review.gluster.org/15913 > NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> > Smoke: Gluster Build System <jenkins@build.gluster.org> > Reviewed-by: Niels de Vos <ndevos@redhat.com> > CentOS-regression: Gluster Build System <jenkins@build.gluster.org> (cherry picked from commit 17d10b42fc4041442e6cd0bfda45944edea498c6) Change-Id: If96d0689fe1b4d74631e383048cdc30b01690dc2 BUG: 1399915 Signed-off-by: Rajesh Joseph <rjoseph@redhat.com> Reviewed-on: http://review.gluster.org/15977 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: Shyamsundar Ranganathan <srangana@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* gfapi: redesign the public interface for upcall consumersNiels de Vos2016-10-191-1/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The glfs_callback_arg and glfs_callback_inode_arg were allocated by gfapi, and expected to be free()'d by the application. However it is not reasonable to expect that applications use the same memory allocator to as the compiled libgfapi.so. For instance, it is possible that gfapi uses glibc malloc/free, and an application like NFS-Ganesha the versions from jemalloc. Mismatching of the malloc() and free() functions causes segmentation faults at best. In order to prevent problems like this in the future, the API for applications that consume upcalls has been remodeled. Any of the structures that gfapi allocates, should be free'd with glfs_free(). The members of the structures can not be accessed directly anymore, each has its own function to access now. Correcting the naming of the functions, structures and constants is a continuation of commit 2775dc64101ed37c8d9809bf9852dbf0746ee2b6. These new improvements not only have correct prefixes for the functions and structures, the naming also reflects more to the upcall framework and does not use "callback" anymore. Cherry picked from commit 4721188a154acd9a0a4c096d8d73e97f3bf1b2a9: > Change-Id: I2b8bd5a0a82036d2abea1a217f5e5975a1d4fe93 > BUG: 1344714 > Signed-off-by: Niels de Vos <ndevos@redhat.com> > Reviewed-on: http://review.gluster.org/14701 > 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: Kaleb KEITHLEY <kkeithle@redhat.com> > Reviewed-by: soumya k <skoduri@redhat.com> > Reviewed-by: jiffin tony Thottan <jthottan@redhat.com> For the ease of backporting, this patch also includes the (mostly overwritten) changes from commit 2775dc64. Change-Id: I2b8bd5a0a82036d2abea1a217f5e5975a1d4fe93 BUG: 1347717 Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/15640 Smoke: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
* gfapi: do not cache upcalls if the application is not interestedNiels de Vos2016-08-311-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the volume option 'features.cache-invalidation' is enabled, upcall events are sent from the brick process to the client. Even if the client is not interested in upcall events itself, md-cache or other xlators may benefit from them. By adding a new 'cache_upcalls' boolean in the 'struct glfs', we can enable the caching of upcalls when the application called glfs_h_poll_upcall(). NFS-Ganesha sets up a thread for handling upcalls in the initialization phase, and calls glfs_h_poll_upcall() before any NFS-client accesses the NFS-export. In the future there will be a more flexible registration API for enabling certain kind of upcall events. Until that is available, this should work just fine. Verificatio of this change is not trivial within our current regression test framework. The bug report contains a description on how to reliably reproduce the problem with the glusterfs-coreutils. Cherry picked from commit 218c9b033fa44eacbc27d87491abd830548b362e: > Change-Id: I818595c92db50e6e48f7bfe287ee05103a4a30a2 > BUG: 1368842 > Signed-off-by: Niels de Vos <ndevos@redhat.com> > Reviewed-on: http://review.gluster.org/15191 > Smoke: Gluster Build System <jenkins@build.gluster.org> > Reviewed-by: Poornima G <pgurusid@redhat.com> > NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> > CentOS-regression: Gluster Build System <jenkins@build.gluster.org> > Reviewed-by: soumya k <skoduri@redhat.com> > Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Change-Id: I818595c92db50e6e48f7bfe287ee05103a4a30a2 BUG: 1368841 Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/15346 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: soumya k <skoduri@redhat.com>
* gfapi: Fix IO error caused when there is consecutive graph switchesPoornima G2016-08-111-2/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Backport of http://review.gluster.org/#/c/14722/ This is part 2 of the fix, the part 1 can be found at: http://review.gluster.org/#/c/14656/ Problem: ======= Consider a race between, __glfs_active_subvol() and graph_setup(). Lets say @TIME T1: fs->active_subvol = A fs->next_subvol = B __glfs_active_subvol() //under lock fs->mutex { .... new_subvol = fs->next_subvol //which is B .... //Start migration from A to B __glfs_first_lookup(){ .... unlock fs->mutex //@TIME T2 network fop lock fs->mutex .... } .... //migration continue on B fs->active_subvol = fs->next_subvol //which is C (explained below) .... } @Time T2, lets say in another thread, graph_setup() is called with C, note that at T2, fs->mutex is unlocked. graph_stup(C...) { lock fs->mutex .... if (fs->next_subvol) // which is B destroy subvol (fs->next_subvol) .... fs->next_subvol = C .... unlock fs->mutex } Thus at the end of this, fs->old_subvol = A; fs->active_subvol = C; fs->next_subvol = NULL; which is wrong, as B completed migration, but was destroyed by graph_setup, and C never was migrated. Solution: ========= Any new graph can be in one of the 2 states: - Picked for migration, migration in progress (fs->mip_subvol) - Not picked so far for migration (fs->next_subvol) graph_setup() updates fs->next_subvol only, __glfs_active_subvol() moves fs->next_subvol to fs->mip_subvol and fs->next_subvol = NULL atomically, and then once the migration is complete, make that the fs->active_subvol Change-Id: Ib6ff0565105c5eedb912a43da4017cd413243612 BUG: 1365821 Signed-off-by: Poornima G <pgurusid@redhat.com> Reviewed-on: http://review.gluster.org/15134 Smoke: Gluster Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
* libgfapi: glfd close is not correctly handled for async fopRajesh Joseph2016-02-101-4/+14
| | | | | | | | | | | | | | | | | | | | | | | There is chance that before the async fop is complete client can send a close. libgfapi destroys glfd on close. Therefore it can lead to crash or unexpected behaviour when the pening fop reaches libgfapi layer. Currently we don't provide any api to cancel these outstanding fops neither we check if the glfd is already closed or not. Therefore as a fix provided refcount for glfd. Each fop (sync or async) will take a ref and once the fop is complete it will unref the refcount. We should not call the registered callback function if glfd is already closed. To achieve this we maintain state of glfd so that we can safely take a call if the fd is closed or not. Change-Id: Ibe71b2225312db3f1be66b244fcf8826c70c357d BUG: 1303995 Signed-off-by: Rajesh Joseph <rjoseph@redhat.com> Reviewed-on: http://review.gluster.org/13340 Smoke: Gluster Build System <jenkins@build.gluster.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
* api: Fix errno being set to EINVAL even on successPrashanth Pai2016-01-051-0/+2
| | | | | | | | | | | | BUG: 1289068 Change-Id: I7905ac70a537f23e1844c097a24eaa6cb762fb82 Signed-off-by: Prashanth Pai <ppai@redhat.com> Reviewed-on: http://review.gluster.org/12909 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: jiffin tony Thottan <jthottan@redhat.com> Reviewed-by: Kaushal M <kaushal@redhat.com> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
* libgfapi: non-default symbol version macros are incorrectKaleb S. KEITHLEY2015-08-191-2/+2
| | | | | | | | | | | | | | | default symbol versions are in form glfs_h_lookupat@@GFAPI_2.7.4, versus old, non-default versions are in the form glfs_h_lookup@GFAPI_2.4.2 I.e. "@@" versus "@" Change-Id: I88a6b129558c0b3a6064de7620b3b20425e80bc9 BUG: 1254863 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/11955 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* rpc: add owner xlator argument to rpc_clnt_newKrishnan Parthasarathi2015-08-121-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The @owner argument tells RPC layer the xlator that owns the connection and to which xlator THIS needs be set during network notifications like CONNECT and DISCONNECT. Code paths that originate from the head of a (volume) graph and use STACK_WIND ensure that the RPC local endpoint has the right xlator saved in the frame of the call (callback pair). This guarantees that the callback is executed in the right xlator context. The client handshake process which includes fetching of brick ports from glusterd, setting lk-version on the brick for the session, don't have the correct xlator set in their frames. The problem lies with RPC notifications. It doesn't have the provision to set THIS with the xlator that is registered with the corresponding RPC programs. e.g, RPC_CLNT_CONNECT event received by protocol/client doesn't have THIS set to its xlator. This implies, call(-callbacks) originating from this thread don't have the right xlator set too. The fix would be to save the xlator registered with the RPC connection during rpc_clnt_new. e.g, protocol/client's xlator would be saved with the RPC connection that it 'owns'. RPC notifications such as CONNECT, DISCONNECT, etc inherit THIS from the RPC connection's xlator. Change-Id: I9dea2c35378c511d800ef58f7fa2ea5552f2c409 BUG: 1235582 Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-on: http://review.gluster.org/11436 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
* libgfapi: Gracefully exit when glfd is invalidPrashanth Pai2015-07-071-2/+2
| | | | | | | | | | | | | | | When glfs_* methods operating on glfd are invoked after calling glfs_close(), the program segfaults inside __GLFS_ENTRY_VALIDATE_FD trying to deference glfd->fd->inode which is invalid. Also, returning EBADF seemed more specific than EINVAL. BUG: 1221008 Change-Id: I13a92dca52da9a300252b69e026581b3a9e931fd Signed-off-by: Prashanth Pai <ppai@redhat.com> Reviewed-on: http://review.gluster.org/10759 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
* build: Mac OS X build issues, gfapi symbol versionsKaleb S. KEITHLEY2015-07-041-1/+1
| | | | | | | | | | | | fix broken symbol versions Change-Id: I153b87d80895ddd4718d0a9e51b4c0712b178bd4 BUG: 1238791 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/11514 Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* Revert "Upcall/gfapi: Return ENOTSUP when upcall feature is disabled"Niels de Vos2015-06-281-1/+0
| | | | | | | | | | | | | | This reverts commit b68f671b2b8a0aafef8f98145aee7044edaa907d from http://review.gluster.org/11196 . The change depends on modifications to the cluster xlators, but these are still partially under review. Dropping this change now, it causes regression tests to fail. Change-Id: If5ae4a519c9c6312cdb2e2a31acce4b1901f9442 BUG: 1231132 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/11452
* gfapi : symlink resolution for glfs_objectJiffin Tony Thottan2015-06-281-0/+4
| | | | | | | | | | | | | | | Generally posix expects symlink should be resolved, before performing an acl related operation. This patch introduces a new api glfs_h_resolve_symlink() which will do the same. Change-Id: Ieee645154455a732edfb2c28834021bab4248810 BUG: 1209735 Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com> Reviewed-on: http://review.gluster.org/11410 Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Raghavendra Talur <rtalur@redhat.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* Upcall/gfapi: Return ENOTSUP when upcall feature is disabledSoumya Koduri2015-06-271-0/+1
| | | | | | | | | | | | | | Changes to detect the list of upcall events enabled using GF_FOP_IPC and return ENOTSUP to applications in case if they poll for any of the events disabled. Change-Id: Icc748054ef903598288119dbe99b1e337174662a BUG: 1231132 Signed-off-by: Niels de Vos <ndevos@redhat.com> Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/11196 Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Tested-by: Kaleb KEITHLEY <kkeithle@redhat.com>
* libgfapi: introduce bit flags for pthread mutex and cond variablesHumble Devassy Chirammal2015-05-281-0/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | At present stage, the initialization and destroy of conditional and mutex variables of glfs struct happen in different places and there is no uniform way of destroying these variables incase there is a failure when initializing these. The fs mutex and conditional variables are getting destroyed from glfs_free_from_ctx(). However this destroy is not done by a conditional check inside destroy function. By introducing bit flags in glfs object, we can make use of the same (if there is a failure in initialization) in glfs_fini() which is evolving as one and only function to free fs and ctx resources. This patch introduce the flags field and set the flags according to the initialization flow of the mutex and conditional variables of struct glfs members. Without this patch we are compelled to use the goto lables and other hacks in init functions to make sure the resources are freed if there is an error path. Change-Id: I86e2719fb7ce437419a05699b4f06c14b02d0e69 BUG: 1208482 Signed-off-by: Humble Devassy Chirammal <hchiramm@redhat.com> Signed-off-by: Poornima G <pgurusid@redhat.com> Reviewed-on: http://review.gluster.org/10120 Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
* libgfapi: Store and restore THIS in every API exposed by libgfapiPoornima G2015-05-081-12/+26
| | | | | | | | | | | | | | | | | | | | | | Storing and restoring THIS: When the APIs exposed by libgfapi are called by other xlators like snapview server etc. the THIS value is overwritten to contain the THIS of libgfapi(viz libgfapi master xlator). Hence using 'THIS' in any xlator after calling libgfapi API will lead to issues. One such issue was uncovered in snapview and the patch http://review.gluster.org/#/c/9469/ was sent to workaround this issue. Hence, storing and restoring THIS, at the entry and exit of every API exposed by libgfapi. Change-Id: I6f330dde25e7700fb26339d667a7ccd193ec6ba0 BUG: 1210934 Signed-off-by: Poornima G <pgurusid@redhat.com> Reviewed-on: http://review.gluster.org/9797 Reviewed-by: Raghavendra Talur <rtalur@redhat.com> Reviewed-by: soumya k <skoduri@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* libgfapi : anonymous fd supportJiffin Tony Thottan2015-05-051-0/+8
| | | | | | | | | | | | | | | | Anonymous fd's are floating fd assigned to a glusterfs client without a explicit file open. Here either it will create a new anonymous fd or existing anonymous fd in the client stack for requested file.The anonymous fd's are mainly used for IO's. This patch introduces two api's glfs_h_anonymous_read and glfs_h_anonymous_write which performs read and write respectively Change-Id: Id646f2220e8387b2f8bb244c848dc1db6761444f BUG: 1204651 Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/9971 Tested-by: Gluster Build System <jenkins@build.gluster.com>
* Upcall: Send stat as part of cache_invalidation notificationsSoumya Koduri2015-05-051-0/+6
| | | | | | | | | | | | | | | | Have added support to send attributes of both entries and its parent (include oldparent in case of RENAME fop) in the same notification request to avoid multiple rpc requests. Also, made changes in gfapi to send parent object and its attributes changed in a single upcall event. Change-Id: I92833da3bcec38d65216921c2ce4d10367c32ef1 BUG: 1200262 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/10460 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
* Upcall: Process each of the upcall events separatelySoumya Koduri2015-04-301-14/+4
| | | | | | | | | | | | | | | | As suggested during the code-review of Bug1200262, have modified GF_CBK_UPCALL to be exlusively GF_CBK_CACHE_INVALIDATION. Thus, for any new upcall event, a new CBK procedure will be added. Also made changes to store upcall data separately based on the upcall event type received. BUG: 1200262 Change-Id: I0f5e53d6f5ece16aecb514a0a426dca40fa1c755 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/10049 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@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>
* gfapi: APIs to store and process upcall notifications receivedSoumya Koduri2015-03-171-0/+27
| | | | | | | | | | | | | | | | | | | | | | | In case of any upcall cbk events received by the protocol/client, gfapi will be notified which queues them up in a list (<gfapi_cbk_upcall>). Applicatons are responsible to provide APIs to process & notify them in case of any such upcall events queued. Added a new API which will be used by Ganesha to repeatedly poll for any such upcall event notified (<glfs_h_poll_upcall>). A new test-file has been added to test the cache_invalidation upcall events. Below link has a writeup which explains the code changes done - URL: https://soumyakoduri.wordpress.com/2015/02/25/glusterfs-understanding-upcall-infrastructure-and-cache-invalidation-support/ Change-Id: Iafc6880000c865fd4da22d0cfc388ec135b5a1c5 BUG: 1200262 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/9536 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
* gfapi: improve source comments and error messages.Humble Devassy Chirammal2015-03-161-3/+3
| | | | | | | | | Change-Id: I0bfa44eb5b5f21e381af3e71c26ea863e4adc46f BUG:1202274 Signed-off-by: Humble Devassy Chirammal <hchiramm@redhat.com> Reviewed-on: http://review.gluster.org/9878 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* api: versioned symbols for glfs_resolve()Ravishankar N2015-01-151-1/+1
| | | | | | | | | | | | | | | A minor fix not addressed in http://review.gluster.org/#/c/9143/. Needed by http://review.gluster.org/#/c/9377/5/ to resolve a merge conflict and for a sucessful compile without warnings about implicit declarations. Change-Id: I4aeb3b53887687096b69516c42a0888c6e137bf6 BUG: 1160709 Signed-off-by: Ravishankar N <ravishankar@redhat.com> Reviewed-on: http://review.gluster.org/9439 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* api: versioned symbols in libgfapi.so for compatibilityKaleb S. KEITHLEY2015-01-121-17/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use versioned symbols to keep libgfapi at libgfapi.so.0.0.0 Revisited to address broken build on Mac OS X See http://review.gluster.org/9036 Rebased to include http://review.gluster.org/#/c/9376/ (glfs_resolve()) but note that gerrit's "Rebase Change" couldn't do it. N.B. noticed that glfs_get_volumeid() decl in glfs.h was missing the __THROW, added it. On systems using ELF and the GNU toolchain, symbol versions are created with a .symver asm operand in the .c source file. Clang is claimed to be compatible with gcc, so we'll pretend for now that this also works with clang. On Mac OS X, aliases are created with __asm "magic" in the .h header file. In the normal case, when both the decl and defn match, that's all that's needed. In our case though the decl and defn don't match --- we have, e.g. a defn such as 'int glfs_foo(...)' and the corresponding decl is 'int pub_glfs_foo(...)'. To make this work we create the necessary aliases in the library at link time with the -alias_list link option. Note that this results in there being pairs of symbols in the .dylib, e.g. _pub_glfs_foo and _glfs_foo$GFAPI_3.4.0. We could use another link option, -unexported_symbols_list to elide the _pub_glfs_* symbols. (And we probably should.) Linux symbol versioning was essentially copied from Solaris; in general I would expect this to "just work" on Solaris, but until someone tries we don't really know. Change-Id: Icb96a3c2d80be7b6d7a6849bb9168f03a947f47c BUG: 1160709 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/9143 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
* api: export glfs_resolve()Ravishankar N2015-01-061-2/+2
| | | | | | | | | | | | | | | | | glfs_resolve() is an internal function in libgfapi. Export it so that it can be used by glfs-heal.c. The change is done in line with the approach followed in commit 7e497871d11a3a527e2ce192e4274322631f27d0 (http://review.gluster.org/9036) This patch [2/3] is required as a part of afr automated split-brain resolution implementation. Change-Id: If9057f2a037fd25a0dfa231683bfbaa72d3cb1b2 BUG: 1136769 Signed-off-by: Ravishankar N <ravishankar@redhat.com> Reviewed-on: http://review.gluster.org/9376 Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Tested-by: Shyamsundar Ranganathan <srangana@redhat.com>
* libgfapi: Wait for GF_EVENT_CHILD_DOWN in glfs_fini()Anoop C S2014-12-081-0/+1
| | | | | | | | | | | | | | | | | | | | | | Whenever glfs_fini() is being called, currently no check is made inside the function to determine whether the child is already down or not. This patch will wait for GF_EVENT_CHILD_DOWN for the active subvol and then exits. TBD: Apart from the active subvol, wait for other CHILD_DOWN events generated through operations like volume set in future. Change-Id: I81c64ac07b463bfed48bf306f9e8f46ba0f0a76f BUG: 1153610 Signed-off-by: Anoop C S <achiraya@redhat.com> Reviewed-on: http://review.gluster.org/9060 Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* api: versioned symbols in libgfapi.so for compatibilityKaleb S. KEITHLEY2014-11-071-14/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use versioned symbols to keep libgfapi at libgfapi.so.0.0.0 Some nits uncovered: + there are a couple functions declared that do not have an associated definition, e.g. glfs_truncate(), glfs_caller_specific_init() + there are seven private/internal functions used by heal/src/glfsheal and the gfapi master xlator (glfs-master.c): glfs_loc_touchup(), glfs_active_subvol(), and glfs_subvol_done(), glfs_init_done(), glfs_resolve_at(), glfs_free_from_ctx(), and glfs_new_from_ctx(); which are not declared in glfs.h; + for this initial pass at versioned symbols, we use the earliest version of all public symbols, i.e. those for which there are declarations in glfs.h or glfs-handles.h. Further investigation as we do backports to 3.6, 3.4, and 3.4 will be required to determine if older implementations need to be preserved (forward ported) and their associated alias(es) and symbol version(s) defined. FWIW, we should consider linking all of our libraries with a map, it'll result in a cleaner ABI. Perhaps something for an intern to do or a Google Summer of Code project. Change-Id: I499456807a5cd26acb39843216ece4276f8e9b84 BUG: 1160709 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/9036 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* gNFS: Subdir mount does not work on UDP protoSantosh Kumar Pradhan2014-10-071-0/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After enabling nfs.mount-udp, mounting a subdir on a volume over NFS fails. Because mountudpproc3_mnt_3_svc() invokes nfs3_rootfh() which internally calls mnt3_mntpath_to_export() to resolve the mount path. mnt3_mntpath_to_export() just works if the mount path requested is volume itself. It is not able to resolve, if the path is a subdir inside the volume. MOUNT over TCP uses mnt3_find_export() to resolve subdir path but UDP can't use this routine because mnt3_find_export() needs the req data (of type rpcsvc_request_t) and it's available only for TCP version of RPC. FIX: (1) Use syncop_lookup() framework to resolve the MOUNT PATH by breaking it into components and resolve component-by-component. i.e. glfs_resolve_at () API from libgfapi shared object. (2) If MOUNT PATH is subdir, then make sure subdir export is not disabled. (3) Add auth mechanism to respect nfs.rpc-auth-allow/reject and subdir auth i.e. nfs.export-dir (4) Enhanced error handling for MOUNT over UDP Change-Id: I42ee69415d064b98af4f49773026562824f684d1 BUG: 1118311 Signed-off-by: Santosh Kumar Pradhan <spradhan@redhat.com> Reviewed-on: http://review.gluster.org/8346 Reviewed-by: soumya k <skoduri@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* libgfapi: Added support to fetch volume info from glusterd and store in ↵Soumya Koduri2014-05-111-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | glfs object. Defined new APIs in the libgfapi module, given a glfs object, * to send handshake RPC call to glusterd process to fetch UUID of the volume * store it in the glusterfs_context linked to the glfs object. * to parse UUID from its cannonical string format into 16-byte array before sending it to the libgfapi users. Defined a RPC call in glusterd which can be used to query volume related info by other processes using 'clnt_handshake_procs'. Note - Currently this RPC call to glusterd process is used only to fetch UUID. But it can be extended to get other volume related structures as well. In addition to the above, defined a new variable to keep track of such handshake RPCs still in progress to make sure all the corresponding RPC callbacks have been processed before libgfapi returns the glfs object initialized. Also bumping up the GFAPI current version number since there is a new API "glfs_get_volume_id" defined and exposed by libgfapi as part of these changes. Change-Id: I303f76d7177d32d25bdb301b1dbcf5cd73f42807 BUG: 1090363 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/7218 Reviewed-by: Anand Avati <avati@redhat.com> Reviewed-by: Harshavardhana <harsha@harshavardhana.net> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* logging: Introduce suppression of repetitive log messagesKrutika Dhananjay2014-04-301-0/+2
| | | | | | | | | Change-Id: I8efa08cc9832ad509fba65a88bb0cddbaf056404 BUG: 1075611 Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com> Reviewed-on: http://review.gluster.org/7475 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* Added Handle-based ops to get/set/remove extended attributes in the libgfapi.Soumya Koduri2014-04-181-0/+3
| | | | | | | | | Change-Id: I1a8e666018d7b93e0bba2d9882935681da909980 BUG: 1089414 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/7308 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
* syncop: Change return value of syncopPranith Kumar K2014-01-191-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: We found a day-1 bug when syncop_xxx() infra is used inside a synctask with compilation optimization (CFLAGS -O2). Detailed explanation of the Root cause: We found the bug in 'gf_defrag_migrate_data' in rebalance operation: Lets look at interesting parts of the function: int gf_defrag_migrate_data (xlator_t *this, gf_defrag_info_t *defrag, loc_t *loc, dict_t *migrate_data) { ..... code section - [ Loop ] while ((ret = syncop_readdirp (this, fd, 131072, offset, NULL, &entries)) != 0) { ..... code section - [ ERRNO-1 ] (errno of readdirp is stored in readdir_operrno by a thread) /* Need to keep track of ENOENT errno, that means, there is no need to send more readdirp() */ readdir_operrno = errno; ..... code section - [ SYNCOP-1 ] (syncop_getxattr is called by a thread) ret = syncop_getxattr (this, &entry_loc, &dict, GF_XATTR_LINKINFO_KEY); code section - [ ERRNO-2] (checking for failures of syncop_getxattr(). This may not always be executed in same thread which executed [SYNCOP-1]) if (ret < 0) { if (errno != ENODATA) { loglevel = GF_LOG_ERROR; defrag->total_failures += 1; ..... } the function above could be executed by thread(t1) till [SYNCOP-1] and code from [ERRNO-2] can be executed by a different thread(t2) because of the way syncop-infra schedules the tasks. when the code is compiled with -O2 optimization this is the assembly code that is generated: [ERRNO-1] 1165 readdir_operrno = errno; <<---- errno gets expanded as *(__errno_location()) 0x00007fd149d48b60 <+496>: callq 0x7fd149d410c0 <address@hidden> 0x00007fd149d48b72 <+514>: mov %rax,0x50(%rsp) <<------ Address returned by __errno_location() is stored in a special location in stack for later use. 0x00007fd149d48b77 <+519>: mov (%rax),%eax 0x00007fd149d48b79 <+521>: mov %eax,0x78(%rsp) .... [ERRNO-2] 1281 if (errno != ENODATA) { 0x00007fd149d492ae <+2366>: mov 0x50(%rsp),%rax <<----- Because it already stored the address returned by __errno_location(), it just dereferences the address to get the errno value. BUT THIS CODE NEED NOT BE EXECUTED BY SAME THREAD!!! 0x00007fd149d492b3 <+2371>: mov $0x9,%ebp 0x00007fd149d492b8 <+2376>: mov (%rax),%edi 0x00007fd149d492ba <+2378>: cmp $0x3d,%edi The problem is that __errno_location() value of t1 and t2 are different. So [ERRNO-2] ends up reading errno of t1 instead of errno of t2 even though t2 is executing [ERRNO-2] code section. When code is compiled without any optimization for [ERRNO-2]: 1281 if (errno != ENODATA) { 0x00007fd58e7a326f <+2237>: callq 0x7fd58e797300 <address@hidden><<--- As it is calling __errno_location() again it gets the location from t2 so it works as intended. 0x00007fd58e7a3274 <+2242>: mov (%rax),%eax 0x00007fd58e7a3276 <+2244>: cmp $0x3d,%eax 0x00007fd58e7a3279 <+2247>: je 0x7fd58e7a32a1 <gf_defrag_migrate_data+2287> Fix: Make syncop_xxx() return (-errno) value as the return value in case of errors and all the functions which make syncop_xxx() will need to use (-ret) to figure out the reason for failure in case of syncop_xxx() failures. Change-Id: I314d20dabe55d3e62ff66f3b4adb1cac2eaebb57 BUG: 1040356 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/6475 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
* gfapi: introduce glfs_readdir() and glfs_readdirplus() APIsAnand Avati2013-11-131-0/+1
| | | | | | | | | Change-Id: I6b233bf647585675f233898351bf593f251716cc BUG: 839950 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/6201 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
* gfapi: object handle based API extensionsR.Shyamsundar2013-10-111-0/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is an ongoing effort to integrate NFS Ganesha ( https://github.com/nfs-ganesha/nfs-ganesha/wiki ) with GlusterFS as one of the file system back ends. Towards this we need extensions to gfapi that can handle object based operations. Meaning, instead of using full paths or relative paths from cwd, it is required that we can work with APIs, like the *at POSIX variants, to be able to create, lookup, open etc. files and directories. Hence the objects are the files or directories themselves and we give out handles to these objects that can be used for further operations. This code drop is an initial implementation of the proposed APIs. The new APIs are implemented as glfs_h_XXX variants in the file glfs-handleops.c to mirror glfs-fops.c style. The code leverages holding onto inode references and doling these out as opaque/cookie type objects to the callers, to enable them to be used as handles in other operations. An fd based approach was considered, but due to the extra footprint that the fd structure and its counterparts would incur, this was dropped to take the approach of holding inode references themselves. Tested by extending glfsxmp.c to invoke and exercise the added APIs, and further tested with a reference integration of the same as an FSAL with NFS Ganesha. Change-Id: I23629c99e905b54070fa2e6565147812e5f3fa5d BUG: 1016000 Signed-off-by: R.Shyamsundar <srangana@redhat.com> Reviewed-on: http://review.gluster.org/5936 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
* gfapi: apply an upper bound on nested symlink resolutionAnand Avati2013-09-051-0/+2
| | | | | | | | | | | | | | | In case of nested symlink resolution, implement an upper bound on the number of such nested levels the resolver will descend. This limit is arbitrary, and set to 2048 nested levels. Change-Id: I264e5bd60d317eda97f4e6f49bd5d8694f8664a9 BUG: 1004100 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/5768 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra Talur <rtalur@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* gfapi: handle graph switch (cwd, fds, locks)Anand Avati2013-05-281-4/+53
| | | | | | | | | | | | | | - Migrate open fds to new graph - Migrate locks held in open fd to new fd - Refresh CWD, so resolution of relative paths happens on refreshed inode (on new graph). Change-Id: I4b18083b9b290107ebda1f917fc85b635ab72fb4 BUG: 953694 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/5059 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <raghavendra@gluster.com>
* gfapi: provide stable st_dev in stat structureAnand Avati2013-05-251-0/+2
| | | | | | | | | | | | | Samba depends on st_dev being unique and stable for different filesystems (it uses st_dev+st_ino as key to store metadata of a file). Change-Id: Ia022fabadfb5ef3fc9724c1b1ca86f1a20f98af9 BUG: 953694 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/5045 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* gfapi: optimistic resolution with ESTALE detectionAnand Avati2013-05-251-2/+2
| | | | | | | | | | | | | | | | | | | Enhance the path resolver to be optimistic. Instead of performing a wasteful ->lookup() fop for every component in every API call, build in speculation logic to consider the previous resolution result temporarily, and if it results in ESTALE either later in the path resolution or in the FOP, then retry resolution with ->lookup() at every level and retry the FOP. This is the same optimistic resolution/retry logic Linux kernel resolver is proposing to use. Change-Id: Iecbc25248754caf0915cd7205910563ff88ce5e7 BUG: 953694 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/4928 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* gfapi: support for chdir() and familyAnand Avati2013-04-191-0/+5
| | | | | | | | | | | | Add support for chdir, fchdir, getcwd, realpath equivalents in GFAPI. These are required for the Samba VFS plugin. Change-Id: I91d2db9146994403c98961c489c7640c51d5add2 BUG: 953694 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/4853 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* gfapi: added more API callsAnand Avati2012-10-081-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - stat - lstat - access - readlink - mknod - mkdir - rmdir - symlink - rename - link - opendir - closedir - seekdir - telldir - readdir_r - statvfs - chmod - fchmod - chown - lchown - fchown - utimens - lutimens - futimens - getxattr - lgetxattr - fgetxattr - setxattr - lsetxattr - fsetxattr - listxattr - llistxattr - flistxattr - removexattr - lremovexattr - fremovexattr Change-Id: Ic2467293ddfbcefaa9b41c82cec61a5602636833 BUG: 839950 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/4022 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>
* gfapi: add symlink (auto resolution) support in resolverAnand Avati2012-09-171-0/+2
| | | | | | | | | | | | - new internal API glfs_lresolve() for usage with APIs like glfs_lXXXX() (e.g. glfs_lstat()) Change-Id: I61c60af6bda3072f189684ad8ac9815d59f455fc BUG: 839950 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/3866 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>
* gfapi: set errno in glfs_init()Anand Avati2012-08-021-0/+1
| | | | | | | | | | | save errno from glfs_init_done and set it in glfs_init_wait() Change-Id: I1a2f43a7e7b0f07f279c175df987ff94d642b629 BUG: 839950 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.com/3771 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>
* gfapi: unglobalize oldvol{file,len}Anand Avati2012-07-271-0/+3
| | | | | | | | | | | Multiple initialization of volumes works fine now. Change-Id: Ibc16957b39325817bc6f9ab90ebac9cefdafabf8 BUG: 839950 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.com/3734 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>
* gfapi: API/library for accessing gluster volumesAnand Avati2012-07-181-0/+74
Change-Id: Ie4cbcf91b58218bebf23cf951c313aceeb29f311 BUG: 839950 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.com/3664 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Bharata B Rao <bharata.rao@gmail.com>
generated by cgit (git 2.34.1) at 2024-05-30 06:51:08 +0000