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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 2025-09-09 21:10:06 -0400
sh_wbuf(): Write failed with %d\n", ret); goto wfail; } else if (retlen != c->wbuf_pagesize) { printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n", retlen, c->wbuf_pagesize); ret = -EIO; goto wfail; } else if ((ret = jffs2_verify_write(c, c->wbuf, c->wbuf_ofs))) { wfail: jffs2_wbuf_recover(c); return ret; } /* Adjust free size of the block if we padded. */ if (pad) { uint32_t waste = c->wbuf_pagesize - c->wbuf_len; D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n", (wbuf_jeb==c->nextblock)?"next":"", wbuf_jeb->offset)); /* wbuf_pagesize - wbuf_len is the amount of space that's to be padded. If there is less free space in the block than that, something screwed up */ if (wbuf_jeb->free_size < waste) { printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n", c->wbuf_ofs, c->wbuf_len, waste); printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n", wbuf_jeb->offset, wbuf_jeb->free_size); BUG(); } spin_lock(&c->erase_completion_lock); jffs2_link_node_ref(c, wbuf_jeb, (c->wbuf_ofs + c->wbuf_len) | REF_OBSOLETE, waste, NULL); /* FIXME: that made it count as dirty. Convert to wasted */ wbuf_jeb->dirty_size -= waste; c->dirty_size -= waste; wbuf_jeb->wasted_size += waste; c->wasted_size += waste; } else spin_lock(&c->erase_completion_lock); /* Stick any now-obsoleted blocks on the erase_pending_list */ jffs2_refile_wbuf_blocks(c); jffs2_clear_wbuf_ino_list(c); spin_unlock(&c->erase_completion_lock); memset(c->wbuf,0xff,c->wbuf_pagesize); /* adjust write buffer offset, else we get a non contiguous write bug */ c->wbuf_ofs += c->wbuf_pagesize; c->wbuf_len = 0; return 0; } /* Trigger garbage collection to flush the write-buffer. If ino arg is zero, do it if _any_ real (i.e. not GC) writes are outstanding. If ino arg non-zero, do it only if a write for the given inode is outstanding. */ int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino) { uint32_t old_wbuf_ofs; uint32_t old_wbuf_len; int ret = 0; D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() called for ino #%u...\n", ino)); if (!c->wbuf) return 0; mutex_lock(&c->alloc_sem); if (!jffs2_wbuf_pending_for_ino(c, ino)) { D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino)); mutex_unlock(&c->alloc_sem); return 0; } old_wbuf_ofs = c->wbuf_ofs; old_wbuf_len = c->wbuf_len; if (c->unchecked_size) { /* GC won't make any progress for a while */ D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() padding. Not finished checking\n")); down_write(&c->wbuf_sem); ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); /* retry flushing wbuf in case jffs2_wbuf_recover left some data in the wbuf */ if (ret) ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); up_write(&c->wbuf_sem); } else while (old_wbuf_len && old_wbuf_ofs == c->wbuf_ofs) { mutex_unlock(&c->alloc_sem); D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n")); ret = jffs2_garbage_collect_pass(c); if (ret) { /* GC failed. Flush it with padding instead */ mutex_lock(&c->alloc_sem); down_write(&c->wbuf_sem); ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); /* retry flushing wbuf in case jffs2_wbuf_recover left some data in the wbuf */ if (ret) ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); up_write(&c->wbuf_sem); break; } mutex_lock(&c->alloc_sem); } D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n")); mutex_unlock(&c->alloc_sem); return ret; } /* Pad write-buffer to end and write it, wasting space. */ int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c) { int ret; if (!c->wbuf) return 0; down_write(&c->wbuf_sem); ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); /* retry - maybe wbuf recover left some data in wbuf. */ if (ret) ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); up_write(&c->wbuf_sem); return ret; } static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf, size_t len) { if (len && !c->wbuf_len && (len >= c->wbuf_pagesize)) return 0; if (len > (c->wbuf_pagesize - c->wbuf_len)) len = c->wbuf_pagesize - c->wbuf_len; memcpy(c->wbuf + c->wbuf_len, buf, len); c->wbuf_len += (uint32_t) len; return len; } int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino) { struct jffs2_eraseblock *jeb; size_t wbuf_retlen, donelen = 0; uint32_t outvec_to = to; int ret, invec; /* If not writebuffered flash, don't bother */ if (!jffs2_is_writebuffered(c)) return jffs2_flash_direct_writev(c, invecs, count, to, retlen); down_write(&c->wbuf_sem); /* If wbuf_ofs is not initialized, set it to target address */ if (c->wbuf_ofs == 0xFFFFFFFF) { c->wbuf_ofs = PAGE_DIV(to); c->wbuf_len = PAGE_MOD(to); memset(c->wbuf,0xff,c->wbuf_pagesize); } /* * Sanity checks on target address. It's permitted to write * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to * write at the beginning of a new erase block. Anything else, * and you die. New block starts at xxx000c (0-b = block * header) */ if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) { /* It's a write to a new block */ if (c->wbuf_len) { D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx " "causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs)); ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); if (ret) goto outerr; } /* set pointer to new block */ c->wbuf_ofs = PAGE_DIV(to); c->wbuf_len = PAGE_MOD(to); } if (to != PAD(c->wbuf_ofs + c->wbuf_len)) { /* We're not writing immediately after the writebuffer. Bad. */ printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write " "to %08lx\n", (unsigned long)to); if (c->wbuf_len) printk(KERN_CRIT "wbuf was previously %08x-%08x\n", c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); BUG(); } /* adjust alignment offset */ if (c->wbuf_len != PAGE_MOD(to)) { c->wbuf_len = PAGE_MOD(to); /* take care of alignment to next page */ if (!c->wbuf_len) { c->wbuf_len = c->wbuf_pagesize; ret = __jffs2_flush_wbuf(c, NOPAD); if (ret) goto outerr; } } for (invec = 0; invec < count; invec++) { int vlen = invecs[invec].iov_len; uint8_t *v = invecs[invec].iov_base; wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); if (c->wbuf_len == c->wbuf_pagesize) { ret = __jffs2_flush_wbuf(c, NOPAD); if (ret) goto outerr; } vlen -= wbuf_retlen; outvec_to += wbuf_retlen; donelen += wbuf_retlen; v += wbuf_retlen; if (vlen >= c->wbuf_pagesize) { ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen), &wbuf_retlen, v); if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen)) goto outfile; vlen -= wbuf_retlen; outvec_to += wbuf_retlen; c->wbuf_ofs = outvec_to; donelen += wbuf_retlen; v += wbuf_retlen; } wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); if (c->wbuf_len == c->wbuf_pagesize) { ret = __jffs2_flush_wbuf(c, NOPAD); if (ret) goto outerr; } outvec_to += wbuf_retlen; donelen += wbuf_retlen; } /* * If there's a remainder in the wbuf and it's a non-GC write, * remember that the wbuf affects this ino */ *retlen = donelen; if (jffs2_sum_active()) { int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to); if (res) return res; } if (c->wbuf_len && ino) jffs2_wbuf_dirties_inode(c, ino); ret = 0; up_write(&c->wbuf_sem); return ret; outfile: /* * At this point we have no problem, c->wbuf is empty. However * refile nextblock to avoid writing again to same address. */ spin_lock(&c->erase_completion_lock); jeb = &c->blocks[outvec_to / c->sector_size]; jffs2_block_refile(c, jeb, REFILE_ANYWAY); spin_unlock(&c->erase_completion_lock); outerr: *retlen = 0; up_write(&c->wbuf_sem); return ret; } /* * This is the entry for flash write. * Check, if we work on NAND FLASH, if so build an kvec and write it via vritev */ int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf) { struct kvec vecs[1]; if (!jffs2_is_writebuffered(c)) return jffs2_flash_direct_write(c, ofs, len, retlen, buf); vecs[0].iov_base = (unsigned char *) buf; vecs[0].iov_len = len; return jffs2_flash_writev(c, vecs, 1, ofs, retlen, 0); } /* Handle readback from writebuffer and ECC failure return */ int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf) { loff_t orbf = 0, owbf = 0, lwbf = 0; int ret; if (!jffs2_is_writebuffered(c)) return c->mtd->read(c->mtd, ofs, len, retlen, buf); /* Read flash */ down_read(&c->wbuf_sem); ret = c->mtd->read(c->mtd, ofs, len, retlen, buf); if ( (ret == -EBADMSG || ret == -EUCLEAN) && (*retlen == len) ) { if (ret == -EBADMSG) printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx)" " returned ECC error\n", len, ofs); /* * We have the raw data without ECC correction in the buffer, * maybe we are lucky and all data or parts are correct. We * check the node. If data are corrupted node check will sort * it out. We keep this block, it will fail on write or erase * and the we mark it bad. Or should we do that now? But we * should give him a chance. Maybe we had a system crash or * power loss before the ecc write or a erase was completed. * So we return success. :) */ ret = 0; } /* if no writebuffer available or write buffer empty, return */ if (!c->wbuf_pagesize || !c->wbuf_len) goto exit; /* if we read in a different block, return */ if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs)) goto exit; if (ofs >= c->wbuf_ofs) { owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */ if (owbf > c->wbuf_len) /* is read beyond write buffer ? */ goto exit; lwbf = c->wbuf_len - owbf; /* number of bytes to copy */ if (lwbf > len) lwbf = len; } else { orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */ if (orbf > len) /* is write beyond write buffer ? */ goto exit; lwbf = len - orbf; /* number of bytes to copy */ if (lwbf > c->wbuf_len) lwbf = c->wbuf_len; } if (lwbf > 0) memcpy(buf+orbf,c->wbuf+owbf,lwbf); exit: up_read(&c->wbuf_sem); return ret; } #define NR_OOB_SCAN_PAGES 4 /* For historical reasons we use only 8 bytes for OOB clean marker */ #define OOB_CM_SIZE 8 static const struct jffs2_unknown_node oob_cleanmarker = { .magic = constant_cpu_to_je16(JFFS2_MAGIC_BITMASK), .nodetype = constant_cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER), .totlen = constant_cpu_to_je32(8) }; /* * Check, if the out of band area is empty. This function knows about the clean * marker and if it is present in OOB, treats the OOB as empty anyway. */ int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int mode) { int i, ret; int cmlen = min_t(int, c->oobavail, OOB_CM_SIZE); struct mtd_oob_ops ops; ops.mode = MTD_OOB_AUTO; ops.ooblen = NR_OOB_SCAN_PAGES * c->oobavail; ops.oobbuf = c->oobbuf; ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0; ops.datbuf = NULL; ret = c->mtd->read_oob(c->mtd, jeb->offset, &ops); if (ret || ops.oobretlen != ops.ooblen) { printk(KERN_ERR "cannot read OOB for EB at %08x, requested %zd" " bytes, read %zd bytes, error %d\n", jeb->offset, ops.ooblen, ops.oobretlen, ret); if (!ret) ret = -EIO; return ret; } for(i = 0; i < ops.ooblen; i++) { if (mode && i < cmlen) /* Yeah, we know about the cleanmarker */ continue; if (ops.oobbuf[i] != 0xFF) { D2(printk(KERN_DEBUG "Found %02x at %x in OOB for " "%08x\n", ops.oobbuf[i], i, jeb->offset)); return 1; } } return 0; } /* * Check for a valid cleanmarker. * Returns: 0 if a valid cleanmarker was found * 1 if no cleanmarker was found * negative error code if an error occurred */ int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) { struct mtd_oob_ops ops; int ret, cmlen = min_t(int, c->oobavail, OOB_CM_SIZE); ops.mode = MTD_OOB_AUTO; ops.ooblen = cmlen; ops.oobbuf = c->oobbuf; ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0; ops.datbuf = NULL; ret = c->mtd->read_oob(c->mtd, jeb->offset, &ops); if (ret || ops.oobretlen != ops.ooblen) { printk(KERN_ERR "cannot read OOB for EB at %08x, requested %zd"