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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 2025-09-10 09:38:30 -0400
"hl opt">= loc & (PAGE_CACHE_SIZE - 1); unsigned blocksize, iblock, pos; struct buffer_head *bh, *dibh; struct page *page; void *kaddr, *ptr; struct gfs2_quota q, *qp; int err, nbytes; u64 size; if (gfs2_is_stuffed(ip)) gfs2_unstuff_dinode(ip, NULL); memset(&q, 0, sizeof(struct gfs2_quota)); err = gfs2_internal_read(ip, NULL, (char *)&q, &loc, sizeof(q)); if (err < 0) return err; err = -EIO; qp = &q; qp->qu_value = be64_to_cpu(qp->qu_value); qp->qu_value += change; qp->qu_value = cpu_to_be64(qp->qu_value); qd->qd_qb.qb_value = qp->qu_value; if (fdq) { if (fdq->d_fieldmask & FS_DQ_BSOFT) { qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit); qd->qd_qb.qb_warn = qp->qu_warn; } if (fdq->d_fieldmask & FS_DQ_BHARD) { qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit); qd->qd_qb.qb_limit = qp->qu_limit; } } /* Write the quota into the quota file on disk */ ptr = qp; nbytes = sizeof(struct gfs2_quota); get_a_page: page = grab_cache_page(mapping, index); if (!page) return -ENOMEM; blocksize = inode->i_sb->s_blocksize; iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); if (!page_has_buffers(page)) create_empty_buffers(page, blocksize, 0); bh = page_buffers(page); pos = blocksize; while (offset >= pos) { bh = bh->b_this_page; iblock++; pos += blocksize; } if (!buffer_mapped(bh)) { gfs2_block_map(inode, iblock, bh, 1); if (!buffer_mapped(bh)) goto unlock_out; /* If it's a newly allocated disk block for quota, zero it */ if (buffer_new(bh)) zero_user(page, pos - blocksize, bh->b_size); } if (PageUptodate(page)) set_buffer_uptodate(bh); if (!buffer_uptodate(bh)) { ll_rw_block(READ_META, 1, &bh); wait_on_buffer(bh); if (!buffer_uptodate(bh)) goto unlock_out; } gfs2_trans_add_bh(ip->i_gl, bh, 0); kaddr = kmap_atomic(page, KM_USER0); if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) nbytes = PAGE_CACHE_SIZE - offset; memcpy(kaddr + offset, ptr, nbytes); flush_dcache_page(page); kunmap_atomic(kaddr, KM_USER0); unlock_page(page); page_cache_release(page); /* If quota straddles page boundary, we need to update the rest of the * quota at the beginning of the next page */ if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { ptr = ptr + nbytes; nbytes = sizeof(struct gfs2_quota) - nbytes; offset = 0; index++; goto get_a_page; } /* Update the disk inode timestamp and size (if extended) */ err = gfs2_meta_inode_buffer(ip, &dibh); if (err) goto out; size = loc + sizeof(struct gfs2_quota); if (size > inode->i_size) { ip->i_disksize = size; i_size_write(inode, size); } inode->i_mtime = inode->i_atime = CURRENT_TIME; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); mark_inode_dirty(inode); out: return err; unlock_out: unlock_page(page); page_cache_release(page); return err; } static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) { struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); unsigned int data_blocks, ind_blocks; struct gfs2_holder *ghs, i_gh; unsigned int qx, x; struct gfs2_quota_data *qd; loff_t offset; unsigned int nalloc = 0, blocks; struct gfs2_alloc *al = NULL; int error; gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), &data_blocks, &ind_blocks); ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); if (!ghs) return -ENOMEM; sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); mutex_lock_nested(&ip->i_inode.i_mutex, I_MUTEX_QUOTA); for (qx = 0; qx < num_qd; qx++) { error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, &ghs[qx]); if (error) goto out; } error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); if (error) goto out; for (x = 0; x < num_qd; x++) { int alloc_required; offset = qd2offset(qda[x]); error = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota), &alloc_required); if (error) goto out_gunlock; if (alloc_required) nalloc++; } al = gfs2_alloc_get(ip); if (!al) { error = -ENOMEM; goto out_gunlock; } /* * 1 blk for unstuffing inode if stuffed. We add this extra * block to the reservation unconditionally. If the inode * doesn't need unstuffing, the block will be released to the * rgrp since it won't be allocated during the transaction */ al->al_requested = 1; /* +3 in the end for unstuffing block, inode size update block * and another block in case quota straddles page boundary and * two blocks need to be updated instead of 1 */ blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; if (nalloc) al->al_requested += nalloc * (data_blocks + ind_blocks); error = gfs2_inplace_reserve(ip); if (error) goto out_alloc; if (nalloc) blocks += al->al_rgd->rd_length + nalloc * ind_blocks + RES_STATFS; error = gfs2_trans_begin(sdp, blocks, 0); if (error) goto out_ipres; for (x = 0; x < num_qd; x++) { qd = qda[x]; offset = qd2offset(qd); error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); if (error) goto out_end_trans; do_qc(qd, -qd->qd_change_sync); } error = 0; out_end_trans: gfs2_trans_end(sdp); out_ipres: gfs2_inplace_release(ip); out_alloc: gfs2_alloc_put(ip); out_gunlock: gfs2_glock_dq_uninit(&i_gh); out: while (qx--) gfs2_glock_dq_uninit(&ghs[qx]); mutex_unlock(&ip->i_inode.i_mutex); kfree(ghs); gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); return error; } static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) { struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); struct gfs2_quota q; struct gfs2_quota_lvb *qlvb; loff_t pos; int error; memset(&q, 0, sizeof(struct gfs2_quota)); pos = qd2offset(qd); error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q)); if (error < 0) return error; qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); qlvb->__pad = 0; qlvb->qb_limit = q.qu_limit; qlvb->qb_warn = q.qu_warn; qlvb->qb_value = q.qu_value; qd->qd_qb = *qlvb; return 0; } static int do_glock(struct gfs2_quota_data *qd, int force_refresh, struct gfs2_holder *q_gh) { struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); struct gfs2_holder i_gh; int error; restart: error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); if (error) return error; qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { gfs2_glock_dq_uninit(q_gh); error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, q_gh); if (error) return error; error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); if (error) goto fail; error = update_qd(sdp, qd); if (error) goto fail_gunlock; gfs2_glock_dq_uninit(&i_gh); gfs2_glock_dq_uninit(q_gh); force_refresh = 0; goto restart; } return 0; fail_gunlock: gfs2_glock_dq_uninit(&i_gh); fail: gfs2_glock_dq_uninit(q_gh); return error; } int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_alloc *al = ip->i_alloc; unsigned int x; int error = 0; gfs2_quota_hold(ip, uid, gid); if (capable(CAP_SYS_RESOURCE) || sdp->sd_args.ar_quota != GFS2_QUOTA_ON) return 0; sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *), sort_qd, NULL); for (x = 0; x < al->al_qd_num; x++) { error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]); if (error) break; } if (!error) set_bit(GIF_QD_LOCKED, &ip->i_flags); else { while (x--) gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); gfs2_quota_unhold(ip); } return error; } static int need_sync(struct gfs2_quota_data *qd) { struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; struct gfs2_tune *gt = &sdp->sd_tune; s64 value; unsigned int num, den; int do_sync = 1; if (!qd->qd_qb.qb_limit) return 0; spin_lock(&qd_lru_lock); value = qd->qd_change; spin_unlock(&qd_lru_lock); spin_lock(&gt->gt_spin); num = gt->gt_quota_scale_num; den = gt->gt_quota_scale_den; spin_unlock(&gt->gt_spin); if (value < 0) do_sync = 0; else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= (s64)be64_to_cpu(qd->qd_qb.qb_limit)) do_sync = 0; else { value *= gfs2_jindex_size(sdp) * num; value = div_s64(value, den); value += (s64)be64_to_cpu(qd->qd_qb.qb_value); if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) do_sync = 0; } return do_sync; } void gfs2_quota_unlock(struct gfs2_inode *ip) { struct gfs2_alloc *al = ip->i_alloc; struct gfs2_quota_data *qda[4]; unsigned int count = 0; unsigned int x; if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) goto out; for (x = 0; x < al->al_qd_num; x++) { struct gfs2_quota_data *qd; int sync; qd = al->al_qd[x]; sync = need_sync(qd); gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); if (sync && qd_trylock(qd)) qda[count++] = qd; } if (count) { do_sync(count, qda); for (x = 0; x < count; x++) qd_unlock(qda[x]); } out: gfs2_quota_unhold(ip); } #define MAX_LINE 256 static int print_message(struct gfs2_quota_data *qd, char *type) { struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", sdp->sd_fsname, type, (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", qd->qd_id); return 0; } int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_alloc *al = ip->i_alloc; struct gfs2_quota_data *qd; s64 value; unsigned int x; int error = 0; if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) return 0; if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) return 0; for (x = 0; x < al->al_qd_num; x++) { qd = al->al_qd[x]; if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) continue; value = (s64)be64_to_cpu(qd->qd_qb.qb_value); spin_lock(&qd_lru_lock); value += qd->qd_change; spin_unlock(&qd_lru_lock); if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { print_message(qd, "exceeded"); quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ? USRQUOTA : GRPQUOTA, qd->qd_id, sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); error = -EDQUOT; break; } else if (be64_to_cpu(qd->qd_qb.qb_warn) && (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && time_after_eq(jiffies, qd->qd_last_warn + gfs2_tune_get(sdp, gt_quota_warn_period) * HZ)) { quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ? USRQUOTA : GRPQUOTA, qd->qd_id, sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); error = print_message(qd, "warning"); qd->qd_last_warn = jiffies; } } return error; } void gfs2_quota_change(struct gfs2_inode *ip, s64 change, u32 uid, u32 gid) { struct gfs2_alloc *al = ip->i_alloc; struct gfs2_quota_data *qd; unsigned int x; if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) return; if (ip->i_diskflags & GFS2_DIF_SYSTEM) return; for (x = 0; x < al->al_qd_num; x++) { qd = al->al_qd[x]; if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { do_qc(qd, change); } } } int gfs2_quota_sync(struct super_block *sb, int type, int wait) { struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_quota_data **qda; unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); unsigned int num_qd; unsigned int x; int error = 0; sdp->sd_quota_sync_gen++; qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); if (!qda) return -ENOMEM; do { num_qd = 0; for (;;) { error = qd_fish(sdp, qda + num_qd); if (error || !qda[num_qd]) break; if (++num_qd == max_qd) break; } if (num_qd) { if (!error) error = do_sync(num_qd, qda); if (!error) for (x = 0; x < num_qd; x++) qda[x]->qd_sync_gen = sdp->sd_quota_sync_gen; for (x = 0; x < num_qd; x++) qd_unlock(qda[x]); } } while (!error && num_qd == max_qd); kfree(qda); return error; } static int gfs2_quota_sync_timeo(struct super_block *sb, int type) { return gfs2_quota_sync(sb, type, 0); } int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) { struct gfs2_quota_data *qd; struct gfs2_holder q_gh; int error; error = qd_get(sdp, user, id, &qd); if (error) return error; error = do_glock(qd, FORCE, &q_gh); if (!error) gfs2_glock_dq_uninit(&q_gh); qd_put(qd); return error; } static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) { const struct gfs2_quota_change *str = buf; qc->qc_change = be64_to_cpu(str->qc_change); qc->qc_flags = be32_to_cpu(str->qc_flags); qc->qc_id = be32_to_cpu(str->qc_id); } int gfs2_quota_init(struct gfs2_sbd *sdp) { struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); unsigned int blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; unsigned int x, slot = 0; unsigned int found = 0; u64 dblock; u32 extlen = 0; int error; if (!ip->i_disksize || ip->i_disksize > (64 << 20) || ip->i_disksize & (sdp->sd_sb.sb_bsize - 1)) { gfs2_consist_inode(ip); return -EIO; } sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); error = -ENOMEM; sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, sizeof(unsigned char *), GFP_NOFS); if (!sdp->sd_quota_bitmap) return error; for (x = 0; x < sdp->sd_quota_chunks; x++) { sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); if (!sdp->sd_quota_bitmap[x]) goto fail; } for (x = 0; x < blocks; x++) { struct buffer_head *bh; unsigned int y; if (!extlen) { int new = 0; error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); if (error) goto fail; } error = -EIO; bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); if (!bh) goto fail; if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { brelse(bh); goto fail; } for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; y++, slot++) { struct gfs2_quota_change_host qc; struct gfs2_quota_data *qd; gfs2_quota_change_in(&qc, bh->b_data + sizeof(struct gfs2_meta_header) + y * sizeof(struct gfs2_quota_change)); if (!qc.qc_change) continue; error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), qc.qc_id, &qd); if (error) { brelse(bh); goto fail; } set_bit(QDF_CHANGE, &qd->qd_flags); qd->qd_change = qc.qc_change; qd->qd_slot = slot; qd->qd_slot_count = 1; spin_lock(&qd_lru_lock); gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); list_add(&qd->qd_list, &sdp->sd_quota_list); atomic_inc(&sdp->sd_quota_count); spin_unlock(&qd_lru_lock); found++; } brelse(bh); dblock++; extlen--; } if (found) fs_info(sdp, "found %u quota changes\n", found); return 0; fail: gfs2_quota_cleanup(sdp); return error; } void gfs2_quota_cleanup(struct gfs2_sbd *sdp) { struct list_head *head = &sdp->sd_quota_list; struct gfs2_quota_data *qd; unsigned int x; spin_lock(&qd_lru_lock); while (!list_empty(head)) { qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); if (atomic_read(&qd->qd_count) > 1 || (atomic_read(&qd->qd_count) && !test_bit(QDF_CHANGE, &qd->qd_flags))) { list_move(&qd->qd_list, head); spin_unlock(&qd_lru_lock); schedule(); spin_lock(&qd_lru_lock); continue; } list_del(&qd->qd_list); /* Also remove if this qd exists in the reclaim list */ if (!list_empty(&qd->qd_reclaim)) { list_del_init(&qd->qd_reclaim); atomic_dec(&qd_lru_count); } atomic_dec(&sdp->sd_quota_count); spin_unlock(&qd_lru_lock); if (!atomic_read(&qd->qd_count)) { gfs2_assert_warn(sdp, !qd->qd_change); gfs2_assert_warn(sdp, !qd->qd_slot_count); } else gfs2_assert_warn(sdp, qd->qd_slot_count == 1); gfs2_assert_warn(sdp, !qd->qd_bh_count); gfs2_glock_put(qd->qd_gl); kmem_cache_free(gfs2_quotad_cachep, qd); spin_lock(&qd_lru_lock); } spin_unlock(&qd_lru_lock); gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); if (sdp->sd_quota_bitmap) { for (x = 0; x < sdp->sd_quota_chunks; x++) kfree(sdp->sd_quota_bitmap[x]); kfree(sdp->sd_quota_bitmap); } } static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) { if (error == 0 || error == -EROFS) return; if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); } static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, int (*fxn)(struct super_block *sb, int type), unsigned long t, unsigned long *timeo, unsigned int *new_timeo) { if (t >= *timeo) { int error = fxn(sdp->sd_vfs, 0); quotad_error(sdp, msg, error); *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; } else { *timeo -= t; } } static void quotad_check_trunc_list(struct gfs2_sbd *sdp) { struct gfs2_inode *ip; while(1) { ip = NULL; spin_lock(&sdp->sd_trunc_lock); if (!list_empty(&sdp->sd_trunc_list)) { ip = list_entry(sdp->sd_trunc_list.next, struct gfs2_inode, i_trunc_list); list_del_init(&ip->i_trunc_list); } spin_unlock(&sdp->sd_trunc_lock); if (ip == NULL) return; gfs2_glock_finish_truncate(ip); } } void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { if (!sdp->sd_statfs_force_sync) { sdp->sd_statfs_force_sync = 1; wake_up(&sdp->sd_quota_wait); } } /** * gfs2_quotad - Write cached quota changes into the quota file * @sdp: Pointer to GFS2 superblock * */ int gfs2_quotad(void *data) { struct gfs2_sbd *sdp = data; struct gfs2_tune *tune = &sdp->sd_tune; unsigned long statfs_timeo = 0; unsigned long quotad_timeo = 0; unsigned long t = 0; DEFINE_WAIT(wait); int empty; while (!kthread_should_stop()) { /* Update the master statfs file */ if (sdp->sd_statfs_force_sync) { int error = gfs2_statfs_sync(sdp->sd_vfs, 0); quotad_error(sdp, "statfs", error); statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; } else quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, &statfs_timeo, &tune->gt_statfs_quantum); /* Update quota file */ quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t, &quotad_timeo, &tune->gt_quota_quantum); /* Check for & recover partially truncated inodes */ quotad_check_trunc_list(sdp); if (freezing(current)) refrigerator(); t = min(quotad_timeo, statfs_timeo); prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); spin_lock(&sdp->sd_trunc_lock); empty = list_empty(&sdp->sd_trunc_list); spin_unlock(&sdp->sd_trunc_lock); if (empty && !sdp->sd_statfs_force_sync) t -= schedule_timeout(t); else t = 0; finish_wait(&sdp->sd_quota_wait, &wait); } return 0; } static int gfs2_quota_get_xstate(struct super_block *sb, struct fs_quota_stat *fqs) { struct gfs2_sbd *sdp = sb->s_fs_info; memset(fqs, 0, sizeof(struct fs_quota_stat)); fqs->qs_version = FS_QSTAT_VERSION; switch (sdp->sd_args.ar_quota) { case GFS2_QUOTA_ON: fqs->qs_flags |= (XFS_QUOTA_UDQ_ENFD | XFS_QUOTA_GDQ_ENFD); /*FALLTHRU*/ case GFS2_QUOTA_ACCOUNT: fqs->qs_flags |= (XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_GDQ_ACCT); break; case GFS2_QUOTA_OFF: break; } if (sdp->sd_quota_inode) { fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; } fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ fqs->qs_incoredqs = atomic_read(&qd_lru_count); return 0; } static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id, struct fs_disk_quota *fdq) { struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_quota_lvb *qlvb; struct gfs2_quota_data *qd; struct gfs2_holder q_gh; int error; memset(fdq, 0, sizeof(struct fs_disk_quota)); if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) return -ESRCH; /* Crazy XFS error code */ if (type == USRQUOTA) type = QUOTA_USER; else if (type == GRPQUOTA) type = QUOTA_GROUP; else return -EINVAL; error = qd_get(sdp, type, id, &qd); if (error) return error; error = do_glock(qd, FORCE, &q_gh); if (error) goto out; qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; fdq->d_version = FS_DQUOT_VERSION; fdq->d_flags = (type == QUOTA_USER) ? XFS_USER_QUOTA : XFS_GROUP_QUOTA; fdq->d_id = id; fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit); fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn); fdq->d_bcount = be64_to_cpu(qlvb->qb_value); gfs2_glock_dq_uninit(&q_gh); out: qd_put(qd); return error; } /* GFS2 only supports a subset of the XFS fields */ #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD) static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, struct fs_disk_quota *fdq) { struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); struct gfs2_quota_data *qd; struct gfs2_holder q_gh, i_gh; unsigned int data_blocks, ind_blocks; unsigned int blocks = 0; int alloc_required; struct gfs2_alloc *al; loff_t offset; int error; if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) return -ESRCH; /* Crazy XFS error code */ switch(type) { case USRQUOTA: type = QUOTA_USER; if (fdq->d_flags != XFS_USER_QUOTA) return -EINVAL; break; case GRPQUOTA: type = QUOTA_GROUP; if (fdq->d_flags != XFS_GROUP_QUOTA) return -EINVAL; break; default: return -EINVAL; } if (fdq->d_fieldmask & ~GFS2_FIELDMASK) return -EINVAL; if (fdq->d_id != id) return -EINVAL; error = qd_get(sdp, type, id, &qd); if (error) return error; mutex_lock(&ip->i_inode.i_mutex); error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); if (error) goto out_put; error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); if (error) goto out_q; /* Check for existing entry, if none then alloc new blocks */ error = update_qd(sdp, qd); if (error) goto out_i; /* If nothing has changed, this is a no-op */ if ((fdq->d_fieldmask & FS_DQ_BSOFT) && (fdq->d_blk_softlimit == be64_to_cpu(qd->qd_qb.qb_warn))) fdq->d_fieldmask ^= FS_DQ_BSOFT; if ((fdq->d_fieldmask & FS_DQ_BHARD) && (fdq->d_blk_hardlimit == be64_to_cpu(qd->qd_qb.qb_limit))) fdq->d_fieldmask ^= FS_DQ_BHARD; if (fdq->d_fieldmask == 0) goto out_i; offset = qd2offset(qd); error = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota), &alloc_required); if (error) goto out_i; if (alloc_required) { al = gfs2_alloc_get(ip); if (al == NULL) goto out_i; gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), &data_blocks, &ind_blocks); blocks = al->al_requested = 1 + data_blocks + ind_blocks; error = gfs2_inplace_reserve(ip); if (error) goto out_alloc; } error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0); if (error) goto out_release; /* Apply changes */ error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); gfs2_trans_end(sdp); out_release: if (alloc_required) { gfs2_inplace_release(ip); out_alloc: gfs2_alloc_put(ip); } out_i: gfs2_glock_dq_uninit(&i_gh); out_q: gfs2_glock_dq_uninit(&q_gh); out_put: mutex_unlock(&ip->i_inode.i_mutex); qd_put(qd); return error; } const struct quotactl_ops gfs2_quotactl_ops = { .quota_sync = gfs2_quota_sync, .get_xstate = gfs2_quota_get_xstate, .get_dqblk = gfs2_get_dqblk, .set_dqblk = gfs2_set_dqblk, };
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-10 09:38:30 -0400