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BranchCommit messageAuthorAge
archive/unc-master-3.0P-FP: fix BUG_ON releated to priority inheritanceBjoern Brandenburg13 years
archived-2013.1uncachedev: mmap memory that is not cached by CPUsGlenn Elliott12 years
archived-private-masterMerge branch 'wip-2.6.34' into old-private-masterAndrea Bastoni15 years
archived-semi-partMerge branch 'wip-semi-part' of ssh://cvs/cvs/proj/litmus/repo/litmus2010 int...Andrea Bastoni15 years
demoFurther refinementsJonathan Herman14 years
ecrts-pgm-finalMerge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...Glenn Elliott12 years
ecrts14-pgm-finalMerge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...Glenn Elliott12 years
gpusync-rtss12Final GPUSync implementation.Glenn Elliott12 years
gpusync/stagingRename IKGLP R2DGLP.Glenn Elliott12 years
linux-tipMerge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/p...Linus Torvalds15 years
litmus2008-patch-seriesadd i386 feather-trace implementationBjoern B. Brandenburg16 years
masterPSN-EDF: use inferred_sporadic_job_release_atBjoern Brandenburg9 years
pgmmake it compileGlenn Elliott12 years
prop/litmus-signalsInfrastructure for Litmus signals.Glenn Elliott13 years
prop/robust-tie-breakFixed bug in edf_higher_prio().Glenn Elliott13 years
stagingFix tracepoint compilation errorFelipe Cerqueira13 years
test9/23/2016Namhoon Kim9 years
tracing-develTest kernel tracing events capabilitiesAndrea Bastoni16 years
v2.6.34-with-arm-patchessmsc911x: Add spinlocks around registers accessCatalin Marinas15 years
v2015.1Add ARM syscall def for get_current_budgetBjoern Brandenburg10 years
wip-2011.2-bbbLitmus core: simplify np-section protocolBjoern B. Brandenburg14 years
wip-2011.2-bbb-traceRefactor sched_trace_log_message() -> debug_trace_log_message()Andrea Bastoni14 years
wip-2012.3-gpuSOBLIV draining support for C-EDF.Glenn Elliott12 years
wip-2012.3-gpu-preportpick up last C-RM fileGlenn Elliott12 years
wip-2012.3-gpu-rtss13Fix critical bug in GPU tracker.Glenn Elliott12 years
wip-2012.3-gpu-sobliv-budget-w-ksharkProper sobliv draining and many bug fixes.Glenn Elliott12 years
wip-aedzl-finalMake it easier to compile AEDZL interfaces in liblitmus.Glenn Elliott15 years
wip-aedzl-revisedAdd sched_trace data for Apative EDZLGlenn Elliott15 years
wip-arbit-deadlineFix compilation bug.Glenn Elliott13 years
wip-aux-tasksDescription of refined aux task inheritance.Glenn Elliott13 years
wip-bbbGSN-EDF & Core: improve debug TRACE'ing for NP sectionsBjoern B. Brandenburg14 years
wip-bbb-prio-donuse correct timestampBjoern B. Brandenburg14 years
wip-better-breakImplement hash-based EDF tie-breaking.Glenn Elliott13 years
wip-binary-heapMake C-EDF work with simplified binheap_deleteGlenn Elliott13 years
wip-budgetAdded support for choices in budget policy enforcement.Glenn Elliott15 years
wip-colorSummarize schedulability with final recordJonathan Herman13 years
wip-color-jlhsched_color: Fixed two bugs causing crashing on experiment restart and a rare...Jonathan Herman13 years
wip-d10-hz1000Enable HZ=1000 on District 10Bjoern B. Brandenburg15 years
wip-default-clusteringFeature: Make default C-EDF clustering compile-time configurable.Glenn Elliott15 years
wip-dissipation-jericksoUpdate from 2.6.36 to 2.6.36.4Jeremy Erickson11 years
wip-dissipation2-jericksoUpdate 2.6.36 to 2.6.36.4Jeremy Erickson11 years
wip-ecrts14-pgmMerge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...Glenn Elliott12 years
wip-edf-hsblast tested versionJonathan Herman14 years
wip-edf-osLookup table EDF-osJeremy Erickson12 years
wip-edf-tie-breakMerge branch 'wip-edf-tie-break' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus...Glenn Elliott13 years
wip-edzl-critiqueUse hr_timer's active checks instead of having own flag.Glenn Elliott15 years
wip-edzl-finalImplementation of the EDZL scheduler.Glenn Elliott15 years
wip-edzl-revisedClean up comments.Glenn Elliott15 years
wip-eventsAdded support for tracing arbitrary actions.Jonathan Herman15 years
wip-extra-debugDBG: add additional tracingBjoern B. Brandenburg15 years
wip-fix-switch-jericksoAttempt to fix race condition with plugin switchingJeremy Erickson15 years
wip-fix3sched: show length of runqueue clock deactivation in /proc/sched_debugBjoern B. Brandenburg15 years
wip-fmlp-dequeueImprove FMLP queue management.Glenn Elliott14 years
wip-ft-irq-flagFeather-Trace: keep track of interrupt-related interference.Bjoern B. Brandenburg14 years
wip-gpu-cleanupEnable sched_trace log injection from userspaceGlenn Elliott13 years
wip-gpu-interruptsRemove option for threading of all softirqs.Glenn Elliott14 years
wip-gpu-rtas12Generalized GPU cost predictors + EWMA. (untested)Glenn Elliott13 years
wip-gpu-rtss12Final GPUSync implementation.Glenn Elliott13 years
wip-gpu-rtss12-srpexperimental changes to support GPUs under SRPGlenn Elliott13 years
wip-gpusync-mergeCleanup priority tracking for budget enforcement.Glenn Elliott11 years
wip-ikglpMove RSM and IKGLP imp. to own .c filesGlenn Elliott13 years
wip-k-fmlpMerge branch 'mpi-master' into wip-k-fmlpGlenn Elliott14 years
wip-kernel-coloringAdded recolor syscallNamhoon Kim7 years
wip-kernthreadsKludge work-queue processing into klitirqd.Glenn Elliott15 years
wip-klmirqd-to-auxAllow klmirqd threads to be given names.Glenn Elliott13 years
wip-ksharkMerge branch 'mpi-staging' into wip-ksharkJonathan Herman13 years
wip-litmus-3.2Merge commit 'v3.2' into litmus-stagingAndrea Bastoni13 years
wip-litmus2011.2Cleanup: Coding conformance for affinity stuff.Glenn Elliott14 years
wip-litmus3.0-2011.2Feather-Trace: keep track of interrupt-related interference.Bjoern B. Brandenburg14 years
wip-master-2.6.33-rtAvoid deadlock when switching task policy to BACKGROUND (ugly)Andrea Bastoni15 years
wip-mcRemoved ARM-specific hacks which disabled less common mixed-criticality featu...Jonathan Herman12 years
wip-mc-bipasaMC-EDF addedbipasa chattopadhyay13 years
wip-mc-jericksoSplit C/D queuesJeremy Erickson15 years
wip-mc2-cache-slackManually patched mc^2 related codeMing Yang10 years
wip-mcrit-maccosmeticMac Mollison15 years
wip-merge-3.0Prevent Linux to send IPI and queue tasks on remote CPUs.Andrea Bastoni14 years
wip-merge-v3.0Prevent Linux to send IPI and queue tasks on remote CPUs.Andrea Bastoni14 years
wip-migration-affinityNULL affinity dereference in C-EDF.Glenn Elliott14 years
wip-mmap-uncacheshare branch with othersGlenn Elliott13 years
wip-modechangeRTSS 2017 submissionNamhoon Kim8 years
wip-nested-lockingAppears to be working.Bryan Ward12 years
wip-omlp-gedfFirst implementation of G-OMLP.Glenn Elliott15 years
wip-paiSome cleanup of PAIGlenn Elliott14 years
wip-percore-lib9/21/2016Namhoon Kim9 years
wip-performanceCONFIG_DONT_PREEMPT_ON_TIE: Don't preeempt a scheduled task on priority tie.Glenn Elliott14 years
wip-pgmAdd PGM support to C-FLGlenn Elliott12 years
wip-pgm-splitFirst draft of C-FL-splitNamhoon Kim12 years
wip-pm-ovdAdd preemption-and-migration overhead tracing supportAndrea Bastoni15 years
wip-prio-inhP-EDF updated to use the generic pi framework.Glenn Elliott15 years
wip-prioq-dglBUG FIX: Support DGLs with PRIOQ_MUTEXGlenn Elliott13 years
wip-refactored-gedfGeneralizd architecture for GEDF-style scheduelrs to reduce code redundancy.Glenn Elliott15 years
wip-release-master-fixbugfix: release master CPU must signal task was pickedBjoern B. Brandenburg14 years
wip-robust-tie-breakEDF priority tie-breaks.Glenn Elliott13 years
wip-rt-ksharkMove task time accounting into the complete_job method.Jonathan Herman13 years
wip-rtas12-pgmScheduling of PGM jobs.Glenn Elliott13 years
wip-semi-partFix compile error with newer GCCJeremy Erickson12 years
wip-semi-part-edfos-jericksoUse initial CPU set by clientJeremy Erickson12 years
wip-shared-libTODO: Fix condition checks in replicate_page_move_mapping()Namhoon Kim9 years
wip-shared-lib2RTAS 2017 Submission ver.Namhoon Kim9 years
wip-shared-memInitial commit for shared libraryNamhoon Kim9 years
wip-splitting-jericksoFix release behaviorJeremy Erickson13 years
wip-splitting-omlp-jericksoBjoern's Dissertation Code with Priority DonationJeremy Erickson13 years
wip-stage-binheapAn efficient binary heap implementation.Glenn Elliott13 years
wip-sun-portDynamic memory allocation and clean exit for FeatherTraceChristopher Kenna15 years
wip-timer-tracebugfix: C-EDF, clear scheduled field of the correct CPU upon task_exitAndrea Bastoni15 years
wip-tracepointsAdd kernel-style events for sched_trace_XXX() functionsAndrea Bastoni14 years
 
TagDownloadAuthorAge
2015.1commit 8e51b37822...Bjoern Brandenburg10 years
2013.1commit bcaacec1ca...Glenn Elliott12 years
2012.3commit c158b5fbe4...Jonathan Herman13 years
2012.2commit b53c479a0f...Glenn Elliott13 years
2012.1commit 83b11ea1c6...Bjoern B. Brandenburg14 years
rtas12-mc-beta-expcommit 8e236ee20f...Christopher Kenna14 years
2011.1commit d11808b5c6...Christopher Kenna15 years
v2.6.37-rc4commit e8a7e48bb2...Linus Torvalds15 years
v2.6.37-rc3commit 3561d43fd2...Linus Torvalds15 years
v2.6.37-rc2commit e53beacd23...Linus Torvalds15 years
v2.6.37-rc1commit c8ddb2713c...Linus Torvalds15 years
v2.6.36commit f6f94e2ab1...Linus Torvalds15 years
2010.2commit 5c5456402d...Bjoern B. Brandenburg15 years
v2.6.36-rc8commit cd07202cc8...Linus Torvalds15 years
v2.6.36-rc7commit cb655d0f3d...Linus Torvalds15 years
v2.6.36-rc6commit 899611ee7d...Linus Torvalds15 years
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2010.1commit 7c1ff4c544...Andrea Bastoni15 years
v2.6.34commit e40152ee1e...Linus Torvalds15 years
v2.6.33.4commit 4640b4e7d9...Greg Kroah-Hartman15 years
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v2.6.15-rc3commit 624f54be20...Linus Torvalds20 years
v2.6.15-rc2commit 3bedff1d73...Linus Torvalds20 years
v2.6.15-rc1commit cd52d1ee9a...Linus Torvalds20 years
v2.6.14commit 741b2252a5...Linus Torvalds20 years
v2.6.14-rc5commit 93918e9afc...Linus Torvalds20 years
v2.6.14-rc4commit 907a426179...Linus Torvalds20 years
v2.6.14-rc3commit 1c9426e8a5...Linus Torvalds20 years
v2.6.14-rc2commit 676d55ae30...Linus Torvalds20 years
v2.6.14-rc1commit 2f4ba45a75...Linus Torvalds20 years
v2.6.13commit 02b3e4e2d7...Linus Torvalds20 years
v2.6.13-rc7commit 0572e3da3f...Linus Torvalds20 years
v2.6.13-rc6commit 6fc32179de...Linus Torvalds20 years
v2.6.13-rc5commit 9a351e30d7...Linus Torvalds20 years
v2.6.13-rc4commit 6395352334...Linus Torvalds20 years
v2.6.11tree c39ae07f39...
v2.6.11-treetree c39ae07f39...
v2.6.12commit 9ee1c939d1...
v2.6.12-rc2commit 1da177e4c3...
v2.6.12-rc3commit a2755a80f4...
v2.6.12-rc4commit 88d7bd8cb9...
v2.6.12-rc5commit 2a24ab628a...
v2.6.12-rc6commit 7cef5677ef...
v2.6.13-rc1commit 4c91aedb75...
v2.6.13-rc2commit a18bcb7450...
v2.6.13-rc3commit c32511e271...
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-11 11:37:51 -0400
XFS_DINODE_FMT_EXTENTS) xfs_attr_shortform_create(&args); /* * Try to add the attr to the attribute list in * the inode. */ error = xfs_attr_shortform_addname(&args); if (error != ENOSPC) { /* * Commit the shortform mods, and we're done. * NOTE: this is also the error path (EEXIST, etc). */ ASSERT(args.trans != NULL); /* * If this is a synchronous mount, make sure that * the transaction goes to disk before returning * to the user. */ if (mp->m_flags & XFS_MOUNT_WSYNC) { xfs_trans_set_sync(args.trans); } err2 = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); xfs_iunlock(dp, XFS_ILOCK_EXCL); /* * Hit the inode change time. */ if (!error && (flags & ATTR_KERNOTIME) == 0) { xfs_ichgtime(dp, XFS_ICHGTIME_CHG); } return(error == 0 ? err2 : error); } /* * It won't fit in the shortform, transform to a leaf block. * GROT: another possible req'mt for a double-split btree op. */ xfs_bmap_init(args.flist, args.firstblock); error = xfs_attr_shortform_to_leaf(&args); if (!error) { error = xfs_bmap_finish(&args.trans, args.flist, &committed); } if (error) { ASSERT(committed); args.trans = NULL; xfs_bmap_cancel(&flist); goto out; } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args.trans, dp); } /* * Commit the leaf transformation. We'll need another (linked) * transaction to add the new attribute to the leaf. */ error = xfs_trans_roll(&args.trans, dp); if (error) goto out; } if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { error = xfs_attr_leaf_addname(&args); } else { error = xfs_attr_node_addname(&args); } if (error) { goto out; } /* * If this is a synchronous mount, make sure that the * transaction goes to disk before returning to the user. */ if (mp->m_flags & XFS_MOUNT_WSYNC) { xfs_trans_set_sync(args.trans); } /* * Commit the last in the sequence of transactions. */ xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); xfs_iunlock(dp, XFS_ILOCK_EXCL); /* * Hit the inode change time. */ if (!error && (flags & ATTR_KERNOTIME) == 0) { xfs_ichgtime(dp, XFS_ICHGTIME_CHG); } return(error); out: if (args.trans) xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); xfs_iunlock(dp, XFS_ILOCK_EXCL); return(error); } int xfs_attr_set( xfs_inode_t *dp, const char *name, char *value, int valuelen, int flags) { int error; struct xfs_name xname; XFS_STATS_INC(xs_attr_set); if (XFS_FORCED_SHUTDOWN(dp->i_mount)) return (EIO); error = xfs_attr_name_to_xname(&xname, name); if (error) return error; return xfs_attr_set_int(dp, &xname, value, valuelen, flags); } /* * Generic handler routine to remove a name from an attribute list. * Transitions attribute list from Btree to shortform as necessary. */ STATIC int xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags) { xfs_da_args_t args; xfs_fsblock_t firstblock; xfs_bmap_free_t flist; int error; xfs_mount_t *mp = dp->i_mount; /* * Fill in the arg structure for this request. */ memset((char *)&args, 0, sizeof(args)); args.name = name->name; args.namelen = name->len; args.flags = flags; args.hashval = xfs_da_hashname(args.name, args.namelen); args.dp = dp; args.firstblock = &firstblock; args.flist = &flist; args.total = 0; args.whichfork = XFS_ATTR_FORK; /* * Attach the dquots to the inode. */ error = xfs_qm_dqattach(dp, 0); if (error) return error; /* * Start our first transaction of the day. * * All future transactions during this code must be "chained" off * this one via the trans_dup() call. All transactions will contain * the inode, and the inode will always be marked with trans_ihold(). * Since the inode will be locked in all transactions, we must log * the inode in every transaction to let it float upward through * the log. */ args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM); /* * Root fork attributes can use reserved data blocks for this * operation if necessary */ if (flags & ATTR_ROOT) args.trans->t_flags |= XFS_TRANS_RESERVE; if ((error = xfs_trans_reserve(args.trans, XFS_ATTRRM_SPACE_RES(mp), XFS_ATTRRM_LOG_RES(mp), 0, XFS_TRANS_PERM_LOG_RES, XFS_ATTRRM_LOG_COUNT))) { xfs_trans_cancel(args.trans, 0); return(error); } xfs_ilock(dp, XFS_ILOCK_EXCL); /* * No need to make quota reservations here. We expect to release some * blocks not allocate in the common case. */ xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args.trans, dp); /* * Decide on what work routines to call based on the inode size. */ if (!xfs_inode_hasattr(dp)) { error = XFS_ERROR(ENOATTR); goto out; } if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { ASSERT(dp->i_afp->if_flags & XFS_IFINLINE); error = xfs_attr_shortform_remove(&args); if (error) { goto out; } } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { error = xfs_attr_leaf_removename(&args); } else { error = xfs_attr_node_removename(&args); } if (error) { goto out; } /* * If this is a synchronous mount, make sure that the * transaction goes to disk before returning to the user. */ if (mp->m_flags & XFS_MOUNT_WSYNC) { xfs_trans_set_sync(args.trans); } /* * Commit the last in the sequence of transactions. */ xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); xfs_iunlock(dp, XFS_ILOCK_EXCL); /* * Hit the inode change time. */ if (!error && (flags & ATTR_KERNOTIME) == 0) { xfs_ichgtime(dp, XFS_ICHGTIME_CHG); } return(error); out: if (args.trans) xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); xfs_iunlock(dp, XFS_ILOCK_EXCL); return(error); } int xfs_attr_remove( xfs_inode_t *dp, const char *name, int flags) { int error; struct xfs_name xname; XFS_STATS_INC(xs_attr_remove); if (XFS_FORCED_SHUTDOWN(dp->i_mount)) return (EIO); error = xfs_attr_name_to_xname(&xname, name); if (error) return error; xfs_ilock(dp, XFS_ILOCK_SHARED); if (!xfs_inode_hasattr(dp)) { xfs_iunlock(dp, XFS_ILOCK_SHARED); return XFS_ERROR(ENOATTR); } xfs_iunlock(dp, XFS_ILOCK_SHARED); return xfs_attr_remove_int(dp, &xname, flags); } int xfs_attr_list_int(xfs_attr_list_context_t *context) { int error; xfs_inode_t *dp = context->dp; XFS_STATS_INC(xs_attr_list); if (XFS_FORCED_SHUTDOWN(dp->i_mount)) return EIO; xfs_ilock(dp, XFS_ILOCK_SHARED); xfs_attr_trace_l_c("syscall start", context); /* * Decide on what work routines to call based on the inode size. */ if (!xfs_inode_hasattr(dp)) { error = 0; } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { error = xfs_attr_shortform_list(context); } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { error = xfs_attr_leaf_list(context); } else { error = xfs_attr_node_list(context); } xfs_iunlock(dp, XFS_ILOCK_SHARED); xfs_attr_trace_l_c("syscall end", context); return error; } #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ (((struct attrlist_ent *) 0)->a_name - (char *) 0) #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \ & ~(sizeof(u_int32_t)-1)) /* * Format an attribute and copy it out to the user's buffer. * Take care to check values and protect against them changing later, * we may be reading them directly out of a user buffer. */ /*ARGSUSED*/ STATIC int xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags, char *name, int namelen, int valuelen, char *value) { struct attrlist *alist = (struct attrlist *)context->alist; attrlist_ent_t *aep; int arraytop; ASSERT(!(context->flags & ATTR_KERNOVAL)); ASSERT(context->count >= 0); ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); ASSERT(context->firstu >= sizeof(*alist)); ASSERT(context->firstu <= context->bufsize); /* * Only list entries in the right namespace. */ if (((context->flags & ATTR_SECURE) == 0) != ((flags & XFS_ATTR_SECURE) == 0)) return 0; if (((context->flags & ATTR_ROOT) == 0) != ((flags & XFS_ATTR_ROOT) == 0)) return 0; arraytop = sizeof(*alist) + context->count * sizeof(alist->al_offset[0]); context->firstu -= ATTR_ENTSIZE(namelen); if (context->firstu < arraytop) { xfs_attr_trace_l_c("buffer full", context); alist->al_more = 1; context->seen_enough = 1; return 1; } aep = (attrlist_ent_t *)&context->alist[context->firstu]; aep->a_valuelen = valuelen; memcpy(aep->a_name, name, namelen); aep->a_name[namelen] = 0; alist->al_offset[context->count++] = context->firstu; alist->al_count = context->count; xfs_attr_trace_l_c("add", context); return 0; } /* * Generate a list of extended attribute names and optionally * also value lengths. Positive return value follows the XFS * convention of being an error, zero or negative return code * is the length of the buffer returned (negated), indicating * success. */ int xfs_attr_list( xfs_inode_t *dp, char *buffer, int bufsize, int flags, attrlist_cursor_kern_t *cursor) { xfs_attr_list_context_t context; struct attrlist *alist; int error; /* * Validate the cursor. */ if (cursor->pad1 || cursor->pad2) return(XFS_ERROR(EINVAL)); if ((cursor->initted == 0) && (cursor->hashval || cursor->blkno || cursor->offset)) return XFS_ERROR(EINVAL); /* * Check for a properly aligned buffer. */ if (((long)buffer) & (sizeof(int)-1)) return XFS_ERROR(EFAULT); if (flags & ATTR_KERNOVAL) bufsize = 0; /* * Initialize the output buffer. */ memset(&context, 0, sizeof(context)); context.dp = dp; context.cursor = cursor; context.resynch = 1; context.flags = flags; context.alist = buffer; context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ context.firstu = context.bufsize; context.put_listent = xfs_attr_put_listent; alist = (struct attrlist *)context.alist; alist->al_count = 0; alist->al_more = 0; alist->al_offset[0] = context.bufsize; error = xfs_attr_list_int(&context); ASSERT(error >= 0); return error; } int /* error */ xfs_attr_inactive(xfs_inode_t *dp) { xfs_trans_t *trans; xfs_mount_t *mp; int error; mp = dp->i_mount; ASSERT(! XFS_NOT_DQATTACHED(mp, dp)); xfs_ilock(dp, XFS_ILOCK_SHARED); if (!xfs_inode_hasattr(dp) || dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { xfs_iunlock(dp, XFS_ILOCK_SHARED); return 0; } xfs_iunlock(dp, XFS_ILOCK_SHARED); /* * Start our first transaction of the day. * * All future transactions during this code must be "chained" off * this one via the trans_dup() call. All transactions will contain * the inode, and the inode will always be marked with trans_ihold(). * Since the inode will be locked in all transactions, we must log * the inode in every transaction to let it float upward through * the log. */ trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL); if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0, XFS_TRANS_PERM_LOG_RES, XFS_ATTRINVAL_LOG_COUNT))) { xfs_trans_cancel(trans, 0); return(error); } xfs_ilock(dp, XFS_ILOCK_EXCL); /* * No need to make quota reservations here. We expect to release some * blocks, not allocate, in the common case. */ xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(trans, dp); /* * Decide on what work routines to call based on the inode size. */ if (!xfs_inode_hasattr(dp) || dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { error = 0; goto out; } error = xfs_attr_root_inactive(&trans, dp); if (error) goto out; /* * signal synchronous inactive transactions unless this * is a synchronous mount filesystem in which case we * know that we're here because we've been called out of * xfs_inactive which means that the last reference is gone * and the unlink transaction has already hit the disk so * async inactive transactions are safe. */ if ((error = xfs_itruncate_finish(&trans, dp, 0LL, XFS_ATTR_FORK, (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)))) goto out; /* * Commit the last in the sequence of transactions. */ xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES); xfs_iunlock(dp, XFS_ILOCK_EXCL); return(error); out: xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); xfs_iunlock(dp, XFS_ILOCK_EXCL); return(error); } /*======================================================================== * External routines when attribute list is inside the inode *========================================================================*/ /* * Add a name to the shortform attribute list structure * This is the external routine. */ STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args) { int newsize, forkoff, retval; retval = xfs_attr_shortform_lookup(args); if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { return(retval); } else if (retval == EEXIST) { if (args->flags & ATTR_CREATE) return(retval); retval = xfs_attr_shortform_remove(args); ASSERT(retval == 0); } if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX || args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX) return(XFS_ERROR(ENOSPC)); newsize = XFS_ATTR_SF_TOTSIZE(args->dp); newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize); if (!forkoff) return(XFS_ERROR(ENOSPC)); xfs_attr_shortform_add(args, forkoff); return(0); } /*======================================================================== * External routines when attribute list is one block *========================================================================*/ /* * Add a name to the leaf attribute list structure * * This leaf block cannot have a "remote" value, we only call this routine * if bmap_one_block() says there is only one block (ie: no remote blks). */ STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args) { xfs_inode_t *dp; xfs_dabuf_t *bp; int retval, error, committed, forkoff; /* * Read the (only) block in the attribute list in. */ dp = args->dp; args->blkno = 0; error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, XFS_ATTR_FORK); if (error) return(error); ASSERT(bp != NULL); /* * Look up the given attribute in the leaf block. Figure out if * the given flags produce an error or call for an atomic rename. */ retval = xfs_attr_leaf_lookup_int(bp, args); if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { xfs_da_brelse(args->trans, bp); return(retval); } else if (retval == EEXIST) { if (args->flags & ATTR_CREATE) { /* pure create op */ xfs_da_brelse(args->trans, bp); return(retval); } args->op_flags |= XFS_DA_OP_RENAME; /* an atomic rename */ args->blkno2 = args->blkno; /* set 2nd entry info*/ args->index2 = args->index; args->rmtblkno2 = args->rmtblkno; args->rmtblkcnt2 = args->rmtblkcnt; } /* * Add the attribute to the leaf block, transitioning to a Btree * if required. */ retval = xfs_attr_leaf_add(bp, args); xfs_da_buf_done(bp); if (retval == ENOSPC) { /* * Promote the attribute list to the Btree format, then * Commit that transaction so that the node_addname() call * can manage its own transactions. */ xfs_bmap_init(args->flist, args->firstblock); error = xfs_attr_leaf_to_node(args); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); return(error); } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } /* * Commit the current trans (including the inode) and start * a new one. */ error = xfs_trans_roll(&args->trans, dp); if (error) return (error); /* * Fob the whole rest of the problem off on the Btree code. */ error = xfs_attr_node_addname(args); return(error); } /* * Commit the transaction that added the attr name so that * later routines can manage their own transactions. */ error = xfs_trans_roll(&args->trans, dp); if (error) return (error); /* * If there was an out-of-line value, allocate the blocks we * identified for its storage and copy the value. This is done * after we create the attribute so that we don't overflow the * maximum size of a transaction and/or hit a deadlock. */ if (args->rmtblkno > 0) { error = xfs_attr_rmtval_set(args); if (error) return(error); } /* * If this is an atomic rename operation, we must "flip" the * incomplete flags on the "new" and "old" attribute/value pairs * so that one disappears and one appears atomically. Then we * must remove the "old" attribute/value pair. */ if (args->op_flags & XFS_DA_OP_RENAME) { /* * In a separate transaction, set the incomplete flag on the * "old" attr and clear the incomplete flag on the "new" attr. */ error = xfs_attr_leaf_flipflags(args); if (error) return(error); /* * Dismantle the "old" attribute/value pair by removing * a "remote" value (if it exists). */ args->index = args->index2; args->blkno = args->blkno2; args->rmtblkno = args->rmtblkno2; args->rmtblkcnt = args->rmtblkcnt2; if (args->rmtblkno) { error = xfs_attr_rmtval_remove(args); if (error) return(error); } /* * Read in the block containing the "old" attr, then * remove the "old" attr from that block (neat, huh!) */ error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, XFS_ATTR_FORK); if (error) return(error); ASSERT(bp != NULL); (void)xfs_attr_leaf_remove(bp, args); /* * If the result is small enough, shrink it all into the inode. */ if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { xfs_bmap_init(args->flist, args->firstblock); error = xfs_attr_leaf_to_shortform(bp, args, forkoff); /* bp is gone due to xfs_da_shrink_inode */ if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); return(error); } /* * bmap_finish() may have committed the last trans * and started a new one. We need the inode to be * in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } } else xfs_da_buf_done(bp); /* * Commit the remove and start the next trans in series. */ error = xfs_trans_roll(&args->trans, dp); } else if (args->rmtblkno > 0) { /* * Added a "remote" value, just clear the incomplete flag. */ error = xfs_attr_leaf_clearflag(args); } return(error); } /* * Remove a name from the leaf attribute list structure * * This leaf block cannot have a "remote" value, we only call this routine * if bmap_one_block() says there is only one block (ie: no remote blks). */ STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args) { xfs_inode_t *dp; xfs_dabuf_t *bp; int error, committed, forkoff; /* * Remove the attribute. */ dp = args->dp; args->blkno = 0; error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, XFS_ATTR_FORK); if (error) { return(error); } ASSERT(bp != NULL); error = xfs_attr_leaf_lookup_int(bp, args); if (error == ENOATTR) { xfs_da_brelse(args->trans, bp); return(error); } (void)xfs_attr_leaf_remove(bp, args); /* * If the result is small enough, shrink it all into the inode. */ if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { xfs_bmap_init(args->flist, args->firstblock); error = xfs_attr_leaf_to_shortform(bp, args, forkoff); /* bp is gone due to xfs_da_shrink_inode */ if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); return(error); } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } } else xfs_da_buf_done(bp); return(0); } /* * Look up a name in a leaf attribute list structure. * * This leaf block cannot have a "remote" value, we only call this routine * if bmap_one_block() says there is only one block (ie: no remote blks). */ STATIC int xfs_attr_leaf_get(xfs_da_args_t *args) { xfs_dabuf_t *bp; int error; args->blkno = 0; error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, XFS_ATTR_FORK); if (error) return(error); ASSERT(bp != NULL); error = xfs_attr_leaf_lookup_int(bp, args); if (error != EEXIST) { xfs_da_brelse(args->trans, bp); return(error); } error = xfs_attr_leaf_getvalue(bp, args); xfs_da_brelse(args->trans, bp); if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) { error = xfs_attr_rmtval_get(args); } return(error); } /* * Copy out attribute entries for attr_list(), for leaf attribute lists. */ STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context) { xfs_attr_leafblock_t *leaf; int error; xfs_dabuf_t *bp; context->cursor->blkno = 0; error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK); if (error) return XFS_ERROR(error); ASSERT(bp != NULL); leaf = bp->data; if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_ATTR_LEAF_MAGIC)) { XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, context->dp->i_mount, leaf); xfs_da_brelse(NULL, bp); return XFS_ERROR(EFSCORRUPTED); } error = xfs_attr_leaf_list_int(bp, context); xfs_da_brelse(NULL, bp); return XFS_ERROR(error); } /*======================================================================== * External routines when attribute list size > XFS_LBSIZE(mp). *========================================================================*/ /* * Add a name to a Btree-format attribute list. * * This will involve walking down the Btree, and may involve splitting * leaf nodes and even splitting intermediate nodes up to and including * the root node (a special case of an intermediate node). * * "Remote" attribute values confuse the issue and atomic rename operations * add a whole extra layer of confusion on top of that. */ STATIC int xfs_attr_node_addname(xfs_da_args_t *args) { xfs_da_state_t *state; xfs_da_state_blk_t *blk; xfs_inode_t *dp; xfs_mount_t *mp; int committed, retval, error; /* * Fill in bucket of arguments/results/context to carry around. */ dp = args->dp; mp = dp->i_mount; restart: state = xfs_da_state_alloc(); state->args = args; state->mp = mp; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_attr_node_ents; /* * Search to see if name already exists, and get back a pointer * to where it should go. */ error = xfs_da_node_lookup_int(state, &retval); if (error) goto out; blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { goto out; } else if (retval == EEXIST) { if (args->flags & ATTR_CREATE) goto out; args->op_flags |= XFS_DA_OP_RENAME; /* atomic rename op */ args->blkno2 = args->blkno; /* set 2nd entry info*/ args->index2 = args->index; args->rmtblkno2 = args->rmtblkno; args->rmtblkcnt2 = args->rmtblkcnt; args->rmtblkno = 0; args->rmtblkcnt = 0; } retval = xfs_attr_leaf_add(blk->bp, state->args); if (retval == ENOSPC) { if (state->path.active == 1) { /* * Its really a single leaf node, but it had * out-of-line values so it looked like it *might* * have been a b-tree. */ xfs_da_state_free(state); xfs_bmap_init(args->flist, args->firstblock); error = xfs_attr_leaf_to_node(args); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); goto out; } /* * bmap_finish() may have committed the last trans * and started a new one. We need the inode to be * in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } /* * Commit the node conversion and start the next * trans in the chain. */ error = xfs_trans_roll(&args->trans, dp); if (error) goto out; goto restart; } /* * Split as many Btree elements as required. * This code tracks the new and old attr's location * in the index/blkno/rmtblkno/rmtblkcnt fields and * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields. */ xfs_bmap_init(args->flist, args->firstblock); error = xfs_da_split(state); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); goto out; } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } } else { /* * Addition succeeded, update Btree hashvals. */ xfs_da_fixhashpath(state, &state->path); } /* * Kill the state structure, we're done with it and need to * allow the buffers to come back later. */ xfs_da_state_free(state); state = NULL; /* * Commit the leaf addition or btree split and start the next * trans in the chain. */ error = xfs_trans_roll(&args->trans, dp); if (error) goto out; /* * If there was an out-of-line value, allocate the blocks we * identified for its storage and copy the value. This is done * after we create the attribute so that we don't overflow the * maximum size of a transaction and/or hit a deadlock. */ if (args->rmtblkno > 0) { error = xfs_attr_rmtval_set(args); if (error) return(error); } /* * If this is an atomic rename operation, we must "flip" the * incomplete flags on the "new" and "old" attribute/value pairs * so that one disappears and one appears atomically. Then we * must remove the "old" attribute/value pair. */ if (args->op_flags & XFS_DA_OP_RENAME) { /* * In a separate transaction, set the incomplete flag on the * "old" attr and clear the incomplete flag on the "new" attr. */ error = xfs_attr_leaf_flipflags(args); if (error) goto out; /* * Dismantle the "old" attribute/value pair by removing * a "remote" value (if it exists). */ args->index = args->index2; args->blkno = args->blkno2; args->rmtblkno = args->rmtblkno2; args->rmtblkcnt = args->rmtblkcnt2; if (args->rmtblkno) { error = xfs_attr_rmtval_remove(args); if (error) return(error); } /* * Re-find the "old" attribute entry after any split ops. * The INCOMPLETE flag means that we will find the "old" * attr, not the "new" one. */ args->flags |= XFS_ATTR_INCOMPLETE; state = xfs_da_state_alloc(); state->args = args; state->mp = mp; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_attr_node_ents; state->inleaf = 0; error = xfs_da_node_lookup_int(state, &retval); if (error) goto out; /* * Remove the name and update the hashvals in the tree. */ blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); error = xfs_attr_leaf_remove(blk->bp, args); xfs_da_fixhashpath(state, &state->path); /* * Check to see if the tree needs to be collapsed. */ if (retval && (state->path.active > 1)) { xfs_bmap_init(args->flist, args->firstblock); error = xfs_da_join(state); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); goto out; } /* * bmap_finish() may have committed the last trans * and started a new one. We need the inode to be * in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } } /* * Commit and start the next trans in the chain. */ error = xfs_trans_roll(&args->trans, dp); if (error) goto out; } else if (args->rmtblkno > 0) { /* * Added a "remote" value, just clear the incomplete flag. */ error = xfs_attr_leaf_clearflag(args); if (error) goto out; } retval = error = 0; out: if (state) xfs_da_state_free(state); if (error) return(error); return(retval); } /* * Remove a name from a B-tree attribute list. * * This will involve walking down the Btree, and may involve joining * leaf nodes and even joining intermediate nodes up to and including * the root node (a special case of an intermediate node). */ STATIC int xfs_attr_node_removename(xfs_da_args_t *args) { xfs_da_state_t *state; xfs_da_state_blk_t *blk; xfs_inode_t *dp; xfs_dabuf_t *bp; int retval, error, committed, forkoff; /* * Tie a string around our finger to remind us where we are. */ dp = args->dp; state = xfs_da_state_alloc(); state->args = args; state->mp = dp->i_mount; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_attr_node_ents; /* * Search to see if name exists, and get back a pointer to it. */ error = xfs_da_node_lookup_int(state, &retval); if (error || (retval != EEXIST)) { if (error == 0) error = retval; goto out; } /* * If there is an out-of-line value, de-allocate the blocks. * This is done before we remove the attribute so that we don't * overflow the maximum size of a transaction and/or hit a deadlock. */ blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->bp != NULL); ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); if (args->rmtblkno > 0) { /* * Fill in disk block numbers in the state structure * so that we can get the buffers back after we commit * several transactions in the following calls. */ error = xfs_attr_fillstate(state); if (error) goto out; /* * Mark the attribute as INCOMPLETE, then bunmapi() the * remote value. */ error = xfs_attr_leaf_setflag(args); if (error) goto out; error = xfs_attr_rmtval_remove(args); if (error) goto out; /* * Refill the state structure with buffers, the prior calls * released our buffers. */ error = xfs_attr_refillstate(state); if (error) goto out; } /* * Remove the name and update the hashvals in the tree. */ blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); retval = xfs_attr_leaf_remove(blk->bp, args); xfs_da_fixhashpath(state, &state->path); /* * Check to see if the tree needs to be collapsed. */ if (retval && (state->path.active > 1)) { xfs_bmap_init(args->flist, args->firstblock); error = xfs_da_join(state); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); goto out; } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } /* * Commit the Btree join operation and start a new trans. */ error = xfs_trans_roll(&args->trans, dp); if (error) goto out; } /* * If the result is small enough, push it all into the inode. */ if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { /* * Have to get rid of the copy of this dabuf in the state. */ ASSERT(state->path.active == 1); ASSERT(state->path.blk[0].bp); xfs_da_buf_done(state->path.blk[0].bp); state->path.blk[0].bp = NULL; error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, XFS_ATTR_FORK); if (error) goto out; ASSERT(be16_to_cpu(((xfs_attr_leafblock_t *) bp->data)->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { xfs_bmap_init(args->flist, args->firstblock); error = xfs_attr_leaf_to_shortform(bp, args, forkoff); /* bp is gone due to xfs_da_shrink_inode */ if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); goto out; } /* * bmap_finish() may have committed the last trans * and started a new one. We need the inode to be * in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } } else xfs_da_brelse(args->trans, bp); } error = 0; out: xfs_da_state_free(state); return(error); } /* * Fill in the disk block numbers in the state structure for the buffers * that are attached to the state structure. * This is done so that we can quickly reattach ourselves to those buffers * after some set of transaction commits have released these buffers. */ STATIC int xfs_attr_fillstate(xfs_da_state_t *state) { xfs_da_state_path_t *path; xfs_da_state_blk_t *blk; int level; /* * Roll down the "path" in the state structure, storing the on-disk * block number for those buffers in the "path". */ path = &state->path; ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->bp) { blk->disk_blkno = xfs_da_blkno(blk->bp); xfs_da_buf_done(blk->bp); blk->bp = NULL; } else { blk->disk_blkno = 0; } } /* * Roll down the "altpath" in the state structure, storing the on-disk * block number for those buffers in the "altpath". */ path = &state->altpath; ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->bp) { blk->disk_blkno = xfs_da_blkno(blk->bp); xfs_da_buf_done(blk->bp); blk->bp = NULL; } else { blk->disk_blkno = 0; } } return(0); } /* * Reattach the buffers to the state structure based on the disk block * numbers stored in the state structure. * This is done after some set of transaction commits have released those * buffers from our grip. */ STATIC int xfs_attr_refillstate(xfs_da_state_t *state) { xfs_da_state_path_t *path; xfs_da_state_blk_t *blk; int level, error; /* * Roll down the "path" in the state structure, storing the on-disk * block number for those buffers in the "path". */ path = &state->path; ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->disk_blkno) { error = xfs_da_read_buf(state->args->trans, state->args->dp, blk->blkno, blk->disk_blkno, &blk->bp, XFS_ATTR_FORK); if (error) return(error); } else { blk->bp = NULL; } } /* * Roll down the "altpath" in the state structure, storing the on-disk * block number for those buffers in the "altpath". */ path = &state->altpath; ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->disk_blkno) { error = xfs_da_read_buf(state->args->trans, state->args->dp, blk->blkno, blk->disk_blkno, &blk->bp, XFS_ATTR_FORK); if (error) return(error); } else { blk->bp = NULL; } } return(0); } /* * Look up a filename in a node attribute list. * * This routine gets called for any attribute fork that has more than one * block, ie: both true Btree attr lists and for single-leaf-blocks with * "remote" values taking up more blocks. */ STATIC int xfs_attr_node_get(xfs_da_args_t *args) { xfs_da_state_t *state; xfs_da_state_blk_t *blk; int error, retval; int i; state = xfs_da_state_alloc(); state->args = args; state->mp = args->dp->i_mount; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_attr_node_ents; /* * Search to see if name exists, and get back a pointer to it. */ error = xfs_da_node_lookup_int(state, &retval); if (error) { retval = error; } else if (retval == EEXIST) { blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->bp != NULL); ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); /* * Get the value, local or "remote" */ retval = xfs_attr_leaf_getvalue(blk->bp, args); if (!retval && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) { retval = xfs_attr_rmtval_get(args); } } /* * If not in a transaction, we have to release all the buffers. */ for (i = 0; i < state->path.active; i++) { xfs_da_brelse(args->trans, state->path.blk[i].bp); state->path.blk[i].bp = NULL; } xfs_da_state_free(state); return(retval); } STATIC int /* error */ xfs_attr_node_list(xfs_attr_list_context_t *context) { attrlist_cursor_kern_t *cursor; xfs_attr_leafblock_t *leaf; xfs_da_intnode_t *node; xfs_da_node_entry_t *btree; int error, i; xfs_dabuf_t *bp; cursor = context->cursor; cursor->initted = 1; /* * Do all sorts of validation on the passed-in cursor structure. * If anything is amiss, ignore the cursor and look up the hashval * starting from the btree root. */ bp = NULL; if (cursor->blkno > 0) { error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, &bp, XFS_ATTR_FORK); if ((error != 0) && (error != EFSCORRUPTED)) return(error); if (bp) { node = bp->data; switch (be16_to_cpu(node->hdr.info.magic)) { case XFS_DA_NODE_MAGIC: xfs_attr_trace_l_cn("wrong blk", context, node); xfs_da_brelse(NULL, bp); bp = NULL; break; case XFS_ATTR_LEAF_MAGIC: leaf = bp->data; if (cursor->hashval > be32_to_cpu(leaf->entries[ be16_to_cpu(leaf->hdr.count)-1].hashval)) { xfs_attr_trace_l_cl("wrong blk", context, leaf); xfs_da_brelse(NULL, bp); bp = NULL; } else if (cursor->hashval <= be32_to_cpu(leaf->entries[0].hashval)) { xfs_attr_trace_l_cl("maybe wrong blk", context, leaf); xfs_da_brelse(NULL, bp); bp = NULL; } break; default: xfs_attr_trace_l_c("wrong blk - ??", context); xfs_da_brelse(NULL, bp); bp = NULL; } } } /* * We did not find what we expected given the cursor's contents, * so we start from the top and work down based on the hash value. * Note that start of node block is same as start of leaf block. */ if (bp == NULL) { cursor->blkno = 0; for (;;) { error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, &bp, XFS_ATTR_FORK); if (error) return(error); if (unlikely(bp == NULL)) { XFS_ERROR_REPORT("xfs_attr_node_list(2)", XFS_ERRLEVEL_LOW, context->dp->i_mount); return(XFS_ERROR(EFSCORRUPTED)); } node = bp->data; if (be16_to_cpu(node->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC) break; if (unlikely(be16_to_cpu(node->hdr.info.magic) != XFS_DA_NODE_MAGIC)) { XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)", XFS_ERRLEVEL_LOW, context->dp->i_mount, node); xfs_da_brelse(NULL, bp); return(XFS_ERROR(EFSCORRUPTED)); } btree = node->btree; for (i = 0; i < be16_to_cpu(node->hdr.count); btree++, i++) { if (cursor->hashval <= be32_to_cpu(btree->hashval)) { cursor->blkno = be32_to_cpu(btree->before); xfs_attr_trace_l_cb("descending", context, btree); break; } } if (i == be16_to_cpu(node->hdr.count)) { xfs_da_brelse(NULL, bp); return(0); } xfs_da_brelse(NULL, bp); } } ASSERT(bp != NULL); /* * Roll upward through the blocks, processing each leaf block in * order. As long as there is space in the result buffer, keep * adding the information. */ for (;;) { leaf = bp->data; if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_ATTR_LEAF_MAGIC)) { XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", XFS_ERRLEVEL_LOW, context->dp->i_mount, leaf); xfs_da_brelse(NULL, bp); return(XFS_ERROR(EFSCORRUPTED)); } error = xfs_attr_leaf_list_int(bp, context); if (error) { xfs_da_brelse(NULL, bp); return error; } if (context->seen_enough || leaf->hdr.info.forw == 0) break; cursor->blkno = be32_to_cpu(leaf->hdr.info.forw); xfs_da_brelse(NULL, bp); error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, &bp, XFS_ATTR_FORK); if (error) return(error); if (unlikely((bp == NULL))) { XFS_ERROR_REPORT("xfs_attr_node_list(5)", XFS_ERRLEVEL_LOW, context->dp->i_mount); return(XFS_ERROR(EFSCORRUPTED)); } } xfs_da_brelse(NULL, bp); return(0); } /*======================================================================== * External routines for manipulating out-of-line attribute values. *========================================================================*/ /* * Read the value associated with an attribute from the out-of-line buffer * that we stored it in. */ int xfs_attr_rmtval_get(xfs_da_args_t *args) { xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE]; xfs_mount_t *mp; xfs_daddr_t dblkno; xfs_caddr_t dst; xfs_buf_t *bp; int nmap, error, tmp, valuelen, blkcnt, i; xfs_dablk_t lblkno; ASSERT(!(args->flags & ATTR_KERNOVAL)); mp = args->dp->i_mount; dst = args->value; valuelen = args->valuelen; lblkno = args->rmtblkno; while (valuelen > 0) { nmap = ATTR_RMTVALUE_MAPSIZE; error = xfs_bmapi(args->trans, args->dp, (xfs_fileoff_t)lblkno, args->rmtblkcnt, XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, NULL, 0, map, &nmap, NULL, NULL); if (error) return(error); ASSERT(nmap >= 1); for (i = 0; (i < nmap) && (valuelen > 0); i++) { ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && (map[i].br_startblock != HOLESTARTBLOCK)); dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno, blkcnt, XFS_BUF_LOCK, &bp); if (error) return(error); tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen : XFS_BUF_SIZE(bp); xfs_biomove(bp, 0, tmp, dst, XFS_B_READ); xfs_buf_relse(bp); dst += tmp; valuelen -= tmp; lblkno += map[i].br_blockcount; } } ASSERT(valuelen == 0); return(0); } /* * Write the value associated with an attribute into the out-of-line buffer * that we have defined for it. */ STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args) { xfs_mount_t *mp; xfs_fileoff_t lfileoff; xfs_inode_t *dp; xfs_bmbt_irec_t map; xfs_daddr_t dblkno; xfs_caddr_t src; xfs_buf_t *bp; xfs_dablk_t lblkno; int blkcnt, valuelen, nmap, error, tmp, committed; dp = args->dp; mp = dp->i_mount; src = args->value; /* * Find a "hole" in the attribute address space large enough for * us to drop the new attribute's value into. */ blkcnt = XFS_B_TO_FSB(mp, args->valuelen); lfileoff = 0; error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, XFS_ATTR_FORK); if (error) { return(error); } args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; args->rmtblkcnt = blkcnt; /* * Roll through the "value", allocating blocks on disk as required. */ while (blkcnt > 0) { /* * Allocate a single extent, up to the size of the value. */ xfs_bmap_init(args->flist, args->firstblock); nmap = 1; error = xfs_bmapi(args->trans, dp, (xfs_fileoff_t)lblkno, blkcnt, XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA | XFS_BMAPI_WRITE, args->firstblock, args->total, &map, &nmap, args->flist, NULL); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); return(error); } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, dp); } ASSERT(nmap == 1); ASSERT((map.br_startblock != DELAYSTARTBLOCK) && (map.br_startblock != HOLESTARTBLOCK)); lblkno += map.br_blockcount; blkcnt -= map.br_blockcount; /* * Start the next trans in the chain. */ error = xfs_trans_roll(&args->trans, dp); if (error) return (error); } /* * Roll through the "value", copying the attribute value to the * already-allocated blocks. Blocks are written synchronously * so that we can know they are all on disk before we turn off * the INCOMPLETE flag. */ lblkno = args->rmtblkno; valuelen = args->valuelen; while (valuelen > 0) { /* * Try to remember where we decided to put the value. */ xfs_bmap_init(args->flist, args->firstblock); nmap = 1; error = xfs_bmapi(NULL, dp, (xfs_fileoff_t)lblkno, args->rmtblkcnt, XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, args->firstblock, 0, &map, &nmap, NULL, NULL); if (error) { return(error); } ASSERT(nmap == 1); ASSERT((map.br_startblock != DELAYSTARTBLOCK) && (map.br_startblock != HOLESTARTBLOCK)); dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); bp = xfs_buf_get_flags(mp->m_ddev_targp, dblkno, blkcnt, XFS_BUF_LOCK); ASSERT(bp); ASSERT(!XFS_BUF_GETERROR(bp)); tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen : XFS_BUF_SIZE(bp); xfs_biomove(bp, 0, tmp, src, XFS_B_WRITE); if (tmp < XFS_BUF_SIZE(bp)) xfs_biozero(bp, tmp, XFS_BUF_SIZE(bp) - tmp); if ((error = xfs_bwrite(mp, bp))) {/* GROT: NOTE: synchronous write */ return (error); } src += tmp; valuelen -= tmp; lblkno += map.br_blockcount; } ASSERT(valuelen == 0); return(0); } /* * Remove the value associated with an attribute by deleting the * out-of-line buffer that it is stored on. */ STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args) { xfs_mount_t *mp; xfs_bmbt_irec_t map; xfs_buf_t *bp; xfs_daddr_t dblkno; xfs_dablk_t lblkno; int valuelen, blkcnt, nmap, error, done, committed; mp = args->dp->i_mount; /* * Roll through the "value", invalidating the attribute value's * blocks. */ lblkno = args->rmtblkno; valuelen = args->rmtblkcnt; while (valuelen > 0) { /* * Try to remember where we decided to put the value. */ xfs_bmap_init(args->flist, args->firstblock); nmap = 1; error = xfs_bmapi(NULL, args->dp, (xfs_fileoff_t)lblkno, args->rmtblkcnt, XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, args->firstblock, 0, &map, &nmap, args->flist, NULL); if (error) { return(error); } ASSERT(nmap == 1); ASSERT((map.br_startblock != DELAYSTARTBLOCK) && (map.br_startblock != HOLESTARTBLOCK)); dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); /* * If the "remote" value is in the cache, remove it. */ bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, XFS_INCORE_TRYLOCK); if (bp) { XFS_BUF_STALE(bp); XFS_BUF_UNDELAYWRITE(bp); xfs_buf_relse(bp); bp = NULL; } valuelen -= map.br_blockcount; lblkno += map.br_blockcount; } /* * Keep de-allocating extents until the remote-value region is gone. */ lblkno = args->rmtblkno; blkcnt = args->rmtblkcnt; done = 0; while (!done) { xfs_bmap_init(args->flist, args->firstblock); error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, 1, args->firstblock, args->flist, NULL, &done); if (!error) { error = xfs_bmap_finish(&args->trans, args->flist, &committed); } if (error) { ASSERT(committed); args->trans = NULL; xfs_bmap_cancel(args->flist); return(error); } /* * bmap_finish() may have committed the last trans and started * a new one. We need the inode to be in all transactions. */ if (committed) { xfs_trans_ijoin(args->trans, args->dp, XFS_ILOCK_EXCL); xfs_trans_ihold(args->trans, args->dp); } /* * Close out trans and start the next one in the chain. */ error = xfs_trans_roll(&args->trans, args->dp); if (error) return (error); } return(0); } #if defined(XFS_ATTR_TRACE) /* * Add a trace buffer entry for an attr_list context structure. */ void xfs_attr_trace_l_c(char *where, struct xfs_attr_list_context *context) { xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_C, where, context, (__psunsigned_t)NULL, (__psunsigned_t)NULL, (__psunsigned_t)NULL); } /* * Add a trace buffer entry for a context structure and a Btree node. */ void xfs_attr_trace_l_cn(char *where, struct xfs_attr_list_context *context, struct xfs_da_intnode *node) { xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CN, where, context, (__psunsigned_t)be16_to_cpu(node->hdr.count), (__psunsigned_t)be32_to_cpu(node->btree[0].hashval), (__psunsigned_t)be32_to_cpu(node->btree[ be16_to_cpu(node->hdr.count)-1].hashval)); } /* * Add a trace buffer entry for a context structure and a Btree element. */ void xfs_attr_trace_l_cb(char *where, struct xfs_attr_list_context *context, struct xfs_da_node_entry *btree) { xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CB, where, context, (__psunsigned_t)be32_to_cpu(btree->hashval), (__psunsigned_t)be32_to_cpu(btree->before), (__psunsigned_t)NULL); } /* * Add a trace buffer entry for a context structure and a leaf block. */ void xfs_attr_trace_l_cl(char *where, struct xfs_attr_list_context *context, struct xfs_attr_leafblock *leaf) { xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CL, where, context, (__psunsigned_t)be16_to_cpu(leaf->hdr.count), (__psunsigned_t)be32_to_cpu(leaf->entries[0].hashval), (__psunsigned_t)be32_to_cpu(leaf->entries[ be16_to_cpu(leaf->hdr.count)-1].hashval)); } /* * Add a trace buffer entry for the arguments given to the routine, * generic form. */ void xfs_attr_trace_enter(int type, char *where, struct xfs_attr_list_context *context, __psunsigned_t a13, __psunsigned_t a14, __psunsigned_t a15) { ASSERT(xfs_attr_trace_buf); ktrace_enter(xfs_attr_trace_buf, (void *)((__psunsigned_t)type), (void *)((__psunsigned_t)where), (void *)((__psunsigned_t)context->dp), (void *)((__psunsigned_t)context->cursor->hashval), (void *)((__psunsigned_t)context->cursor->blkno), (void *)((__psunsigned_t)context->cursor->offset), (void *)((__psunsigned_t)context->alist), (void *)((__psunsigned_t)context->bufsize), (void *)((__psunsigned_t)context->count), (void *)((__psunsigned_t)context->firstu), NULL, (void *)((__psunsigned_t)context->dupcnt), (void *)((__psunsigned_t)context->flags), (void *)a13, (void *)a14, (void *)a15); } #endif /* XFS_ATTR_TRACE */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-11 11:37:51 -0400