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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 2025-09-08 20:42:44 -0400
lass="hl opt">(sb, ERRORS_PANIC)) panic("EXT3-fs (device %s): panic forced after error\n", sb->s_id); } void ext3_error (struct super_block * sb, const char * function, const char * fmt, ...) { va_list args; va_start(args, fmt); printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); vprintk(fmt, args); printk("\n"); va_end(args); ext3_handle_error(sb); } static const char *ext3_decode_error(struct super_block * sb, int errno, char nbuf[16]) { char *errstr = NULL; switch (errno) { case -EIO: errstr = "IO failure"; break; case -ENOMEM: errstr = "Out of memory"; break; case -EROFS: if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) errstr = "Journal has aborted"; else errstr = "Readonly filesystem"; break; default: /* If the caller passed in an extra buffer for unknown * errors, textualise them now. Else we just return * NULL. */ if (nbuf) { /* Check for truncated error codes... */ if (snprintf(nbuf, 16, "error %d", -errno) >= 0) errstr = nbuf; } break; } return errstr; } /* __ext3_std_error decodes expected errors from journaling functions * automatically and invokes the appropriate error response. */ void __ext3_std_error (struct super_block * sb, const char * function, int errno) { char nbuf[16]; const char *errstr; /* Special case: if the error is EROFS, and we're not already * inside a transaction, then there's really no point in logging * an error. */ if (errno == -EROFS && journal_current_handle() == NULL && (sb->s_flags & MS_RDONLY)) return; errstr = ext3_decode_error(sb, errno, nbuf); printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n", sb->s_id, function, errstr); ext3_handle_error(sb); } /* * ext3_abort is a much stronger failure handler than ext3_error. The * abort function may be used to deal with unrecoverable failures such * as journal IO errors or ENOMEM at a critical moment in log management. * * We unconditionally force the filesystem into an ABORT|READONLY state, * unless the error response on the fs has been set to panic in which * case we take the easy way out and panic immediately. */ void ext3_abort (struct super_block * sb, const char * function, const char * fmt, ...) { va_list args; printk (KERN_CRIT "ext3_abort called.\n"); va_start(args, fmt); printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); vprintk(fmt, args); printk("\n"); va_end(args); if (test_opt(sb, ERRORS_PANIC)) panic("EXT3-fs panic from previous error\n"); if (sb->s_flags & MS_RDONLY) return; printk(KERN_CRIT "Remounting filesystem read-only\n"); EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; sb->s_flags |= MS_RDONLY; EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; journal_abort(EXT3_SB(sb)->s_journal, -EIO); } void ext3_warning (struct super_block * sb, const char * function, const char * fmt, ...) { va_list args; va_start(args, fmt); printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ", sb->s_id, function); vprintk(fmt, args); printk("\n"); va_end(args); } void ext3_update_dynamic_rev(struct super_block *sb) { struct ext3_super_block *es = EXT3_SB(sb)->s_es; if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) return; ext3_warning(sb, __FUNCTION__, "updating to rev %d because of new feature flag, " "running e2fsck is recommended", EXT3_DYNAMIC_REV); es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); /* leave es->s_feature_*compat flags alone */ /* es->s_uuid will be set by e2fsck if empty */ /* * The rest of the superblock fields should be zero, and if not it * means they are likely already in use, so leave them alone. We * can leave it up to e2fsck to clean up any inconsistencies there. */ } /* * Open the external journal device */ static struct block_device *ext3_blkdev_get(dev_t dev) { struct block_device *bdev; char b[BDEVNAME_SIZE]; bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); if (IS_ERR(bdev)) goto fail; return bdev; fail: printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n", __bdevname(dev, b), PTR_ERR(bdev)); return NULL; } /* * Release the journal device */ static int ext3_blkdev_put(struct block_device *bdev) { bd_release(bdev); return blkdev_put(bdev); } static int ext3_blkdev_remove(struct ext3_sb_info *sbi) { struct block_device *bdev; int ret = -ENODEV; bdev = sbi->journal_bdev; if (bdev) { ret = ext3_blkdev_put(bdev); sbi->journal_bdev = NULL; } return ret; } static inline struct inode *orphan_list_entry(struct list_head *l) { return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; } static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) { struct list_head *l; printk(KERN_ERR "sb orphan head is %d\n", le32_to_cpu(sbi->s_es->s_last_orphan)); printk(KERN_ERR "sb_info orphan list:\n"); list_for_each(l, &sbi->s_orphan) { struct inode *inode = orphan_list_entry(l); printk(KERN_ERR " " "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", inode->i_sb->s_id, inode->i_ino, inode, inode->i_mode, inode->i_nlink, NEXT_ORPHAN(inode)); } } static void ext3_put_super (struct super_block * sb) { struct ext3_sb_info *sbi = EXT3_SB(sb); struct ext3_super_block *es = sbi->s_es; int i; ext3_xattr_put_super(sb); journal_destroy(sbi->s_journal); if (!(sb->s_flags & MS_RDONLY)) { EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state); BUFFER_TRACE(sbi->s_sbh, "marking dirty"); mark_buffer_dirty(sbi->s_sbh); ext3_commit_super(sb, es, 1); } for (i = 0; i < sbi->s_gdb_count; i++) brelse(sbi->s_group_desc[i]); kfree(sbi->s_group_desc); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); brelse(sbi->s_sbh); #ifdef CONFIG_QUOTA for (i = 0; i < MAXQUOTAS; i++) kfree(sbi->s_qf_names[i]); #endif /* Debugging code just in case the in-memory inode orphan list * isn't empty. The on-disk one can be non-empty if we've * detected an error and taken the fs readonly, but the * in-memory list had better be clean by this point. */ if (!list_empty(&sbi->s_orphan)) dump_orphan_list(sb, sbi); J_ASSERT(list_empty(&sbi->s_orphan)); invalidate_bdev(sb->s_bdev, 0); if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { /* * Invalidate the journal device's buffers. We don't want them * floating about in memory - the physical journal device may * hotswapped, and it breaks the `ro-after' testing code. */ sync_blockdev(sbi->journal_bdev); invalidate_bdev(sbi->journal_bdev, 0); ext3_blkdev_remove(sbi); } sb->s_fs_info = NULL; kfree(sbi); return; } static kmem_cache_t *ext3_inode_cachep; /* * Called inside transaction, so use GFP_NOFS */ static struct inode *ext3_alloc_inode(struct super_block *sb) { struct ext3_inode_info *ei; ei = kmem_cache_alloc(ext3_inode_cachep, SLAB_NOFS); if (!ei) return NULL; #ifdef CONFIG_EXT3_FS_POSIX_ACL ei->i_acl = EXT3_ACL_NOT_CACHED; ei->i_default_acl = EXT3_ACL_NOT_CACHED; #endif ei->i_block_alloc_info = NULL; ei->vfs_inode.i_version = 1; return &ei->vfs_inode; } static void ext3_destroy_inode(struct inode *inode) { kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); } static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) { struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) { INIT_LIST_HEAD(&ei->i_orphan); #ifdef CONFIG_EXT3_FS_XATTR init_rwsem(&ei->xattr_sem); #endif mutex_init(&ei->truncate_mutex); inode_init_once(&ei->vfs_inode); } } static int init_inodecache(void) { ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", sizeof(struct ext3_inode_info), 0, (SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD), init_once, NULL); if (ext3_inode_cachep == NULL) return -ENOMEM; return 0; } static void destroy_inodecache(void) { kmem_cache_destroy(ext3_inode_cachep); } static void ext3_clear_inode(struct inode *inode) { struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info; #ifdef CONFIG_EXT3_FS_POSIX_ACL if (EXT3_I(inode)->i_acl && EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) { posix_acl_release(EXT3_I(inode)->i_acl); EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED; } if (EXT3_I(inode)->i_default_acl && EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) { posix_acl_release(EXT3_I(inode)->i_default_acl); EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED; } #endif ext3_discard_reservation(inode); EXT3_I(inode)->i_block_alloc_info = NULL; if (unlikely(rsv)) kfree(rsv); } static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) { #if defined(CONFIG_QUOTA) struct ext3_sb_info *sbi = EXT3_SB(sb); if (sbi->s_jquota_fmt) seq_printf(seq, ",jqfmt=%s", (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); if (sbi->s_qf_names[USRQUOTA]) seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); if (sbi->s_qf_names[GRPQUOTA]) seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) seq_puts(seq, ",usrquota"); if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) seq_puts(seq, ",grpquota"); #endif } static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) { struct super_block *sb = vfs->mnt_sb; if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) seq_puts(seq, ",data=journal"); else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) seq_puts(seq, ",data=ordered"); else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) seq_puts(seq, ",data=writeback"); ext3_show_quota_options(seq, sb); return 0; } static struct dentry *ext3_get_dentry(struct super_block *sb, void *vobjp) { __u32 *objp = vobjp; unsigned long ino = objp[0]; __u32 generation = objp[1]; struct inode *inode; struct dentry *result; if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) return ERR_PTR(-ESTALE); if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) return ERR_PTR(-ESTALE); /* iget isn't really right if the inode is currently unallocated!! * * ext3_read_inode will return a bad_inode if the inode had been * deleted, so we should be safe. * * Currently we don't know the generation for parent directory, so * a generation of 0 means "accept any" */ inode = iget(sb, ino); if (inode == NULL) return ERR_PTR(-ENOMEM); if (is_bad_inode(inode) || (generation && inode->i_generation != generation)) { iput(inode); return ERR_PTR(-ESTALE); } /* now to find a dentry. * If possible, get a well-connected one */ result = d_alloc_anon(inode); if (!result) { iput(inode); return ERR_PTR(-ENOMEM); } return result; } #ifdef CONFIG_QUOTA #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) static int ext3_dquot_initialize(struct inode *inode, int type); static int ext3_dquot_drop(struct inode *inode); static int ext3_write_dquot(struct dquot *dquot); static int ext3_acquire_dquot(struct dquot *dquot); static int ext3_release_dquot(struct dquot *dquot); static int ext3_mark_dquot_dirty(struct dquot *dquot); static int ext3_write_info(struct super_block *sb, int type); static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path); static int ext3_quota_on_mount(struct super_block *sb, int type); static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off); static ssize_t ext3_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); static struct dquot_operations ext3_quota_operations = { .initialize = ext3_dquot_initialize, .drop = ext3_dquot_drop, .alloc_space = dquot_alloc_space, .alloc_inode = dquot_alloc_inode, .free_space = dquot_free_space, .free_inode = dquot_free_inode, .transfer = dquot_transfer, .write_dquot = ext3_write_dquot, .acquire_dquot = ext3_acquire_dquot, .release_dquot = ext3_release_dquot, .mark_dirty = ext3_mark_dquot_dirty, .write_info = ext3_write_info }; static struct quotactl_ops ext3_qctl_operations = { .quota_on = ext3_quota_on, .quota_off = vfs_quota_off, .quota_sync = vfs_quota_sync, .get_info = vfs_get_dqinfo, .set_info = vfs_set_dqinfo, .get_dqblk = vfs_get_dqblk, .set_dqblk = vfs_set_dqblk }; #endif static struct super_operations ext3_sops = { .alloc_inode = ext3_alloc_inode, .destroy_inode = ext3_destroy_inode, .read_inode = ext3_read_inode, .write_inode = ext3_write_inode, .dirty_inode = ext3_dirty_inode, .delete_inode = ext3_delete_inode, .put_super = ext3_put_super, .write_super = ext3_write_super, .sync_fs = ext3_sync_fs, .write_super_lockfs = ext3_write_super_lockfs, .unlockfs = ext3_unlockfs, .statfs = ext3_statfs, .remount_fs = ext3_remount, .clear_inode = ext3_clear_inode, .show_options = ext3_show_options, #ifdef CONFIG_QUOTA .quota_read = ext3_quota_read, .quota_write = ext3_quota_write, #endif }; static struct export_operations ext3_export_ops = { .get_parent = ext3_get_parent, .get_dentry = ext3_get_dentry, }; enum { Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, Opt_grpquota }; static match_table_t tokens = { {Opt_bsd_df, "bsddf"}, {Opt_minix_df, "minixdf"}, {Opt_grpid, "grpid"}, {Opt_grpid, "bsdgroups"}, {Opt_nogrpid, "nogrpid"}, {Opt_nogrpid, "sysvgroups"}, {Opt_resgid, "resgid=%u"}, {Opt_resuid, "resuid=%u"}, {Opt_sb, "sb=%u"}, {Opt_err_cont, "errors=continue"}, {Opt_err_panic, "errors=panic"}, {Opt_err_ro, "errors=remount-ro"}, {Opt_nouid32, "nouid32"}, {Opt_nocheck, "nocheck"}, {Opt_nocheck, "check=none"}, {Opt_debug, "debug"}, {Opt_oldalloc, "oldalloc"}, {Opt_orlov, "orlov"}, {Opt_user_xattr, "user_xattr"}, {Opt_nouser_xattr, "nouser_xattr"}, {Opt_acl, "acl"}, {Opt_noacl, "noacl"}, {Opt_reservation, "reservation"}, {Opt_noreservation, "noreservation"}, {Opt_noload, "noload"}, {Opt_nobh, "nobh"}, {Opt_bh, "bh"}, {Opt_commit, "commit=%u"}, {Opt_journal_update, "journal=update"}, {Opt_journal_inum, "journal=%u"}, {Opt_journal_dev, "journal_dev=%u"}, {Opt_abort, "abort"}, {Opt_data_journal, "data=journal"}, {Opt_data_ordered, "data=ordered"}, {Opt_data_writeback, "data=writeback"}, {Opt_offusrjquota, "usrjquota="}, {Opt_usrjquota, "usrjquota=%s"}, {Opt_offgrpjquota, "grpjquota="}, {Opt_grpjquota, "grpjquota=%s"}, {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, {Opt_grpquota, "grpquota"}, {Opt_noquota, "noquota"}, {Opt_quota, "quota"}, {Opt_usrquota, "usrquota"}, {Opt_barrier, "barrier=%u"}, {Opt_err, NULL}, {Opt_resize, "resize"}, }; static ext3_fsblk_t get_sb_block(void **data) { ext3_fsblk_t sb_block; char *options = (char *) *data; if (!options || strncmp(options, "sb=", 3) != 0) return 1; /* Default location */ options += 3; /*todo: use simple_strtoll with >32bit ext3 */ sb_block = simple_strtoul(options, &options, 0); if (*options && *options != ',') { printk("EXT3-fs: Invalid sb specification: %s\n", (char *) *data); return 1; } if (*options == ',') options++; *data = (void *) options; return sb_block; } static int parse_options (char *options, struct super_block *sb, unsigned int *inum, unsigned long *journal_devnum, ext3_fsblk_t *n_blocks_count, int is_remount) { struct ext3_sb_info *sbi = EXT3_SB(sb); char * p; substring_t args[MAX_OPT_ARGS]; int data_opt = 0; int option; #ifdef CONFIG_QUOTA int qtype; char *qname; #endif if (!options) return 1; while ((p = strsep (&options, ",")) != NULL) { int token; if (!*p) continue; token = match_token(p, tokens, args); switch (token) { case Opt_bsd_df: clear_opt (sbi->s_mount_opt, MINIX_DF); break; case Opt_minix_df: set_opt (sbi->s_mount_opt, MINIX_DF); break; case Opt_grpid: set_opt (sbi->s_mount_opt, GRPID); break; case Opt_nogrpid: clear_opt (sbi->s_mount_opt, GRPID); break; case Opt_resuid: if (match_int(&args[0], &option)) return 0; sbi->s_resuid = option; break; case Opt_resgid: if (match_int(&args[0], &option)) return 0; sbi->s_resgid = option; break; case Opt_sb: /* handled by get_sb_block() instead of here */ /* *sb_block = match_int(&args[0]); */ break; case Opt_err_panic: clear_opt (sbi->s_mount_opt, ERRORS_CONT); clear_opt (sbi->s_mount_opt, ERRORS_RO); set_opt (sbi->s_mount_opt, ERRORS_PANIC); break; case Opt_err_ro: clear_opt (sbi->s_mount_opt, ERRORS_CONT); clear_opt (sbi->s_mount_opt, ERRORS_PANIC); set_opt (sbi->s_mount_opt, ERRORS_RO); break; case Opt_err_cont: clear_opt (sbi->s_mount_opt, ERRORS_RO); clear_opt (sbi->s_mount_opt, ERRORS_PANIC); set_opt (sbi->s_mount_opt, ERRORS_CONT); break; case Opt_nouid32: set_opt (sbi->s_mount_opt, NO_UID32); break; case Opt_nocheck: clear_opt (sbi->s_mount_opt, CHECK); break; case Opt_debug: set_opt (sbi->s_mount_opt, DEBUG); break; case Opt_oldalloc: set_opt (sbi->s_mount_opt, OLDALLOC); break; case Opt_orlov: clear_opt (sbi->s_mount_opt, OLDALLOC); break; #ifdef CONFIG_EXT3_FS_XATTR case Opt_user_xattr: set_opt (sbi->s_mount_opt, XATTR_USER); break; case Opt_nouser_xattr: clear_opt (sbi->s_mount_opt, XATTR_USER); break; #else case Opt_user_xattr: case Opt_nouser_xattr: printk("EXT3 (no)user_xattr options not supported\n"); break; #endif #ifdef CONFIG_EXT3_FS_POSIX_ACL case Opt_acl: set_opt(sbi->s_mount_opt, POSIX_ACL); break; case Opt_noacl: clear_opt(sbi->s_mount_opt, POSIX_ACL); break; #else case Opt_acl: case Opt_noacl: printk("EXT3 (no)acl options not supported\n"); break; #endif case Opt_reservation: set_opt(sbi->s_mount_opt, RESERVATION); break; case Opt_noreservation: clear_opt(sbi->s_mount_opt, RESERVATION); break; case Opt_journal_update: /* @@@ FIXME */ /* Eventually we will want to be able to create a journal file here. For now, only allow the user to specify an existing inode to be the journal file. */ if (is_remount) { printk(KERN_ERR "EXT3-fs: cannot specify " "journal on remount\n"); return 0; } set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); break; case Opt_journal_inum: if (is_remount) { printk(KERN_ERR "EXT3-fs: cannot specify " "journal on remount\n"); return 0; } if (match_int(&args[0], &option)) return 0; *inum = option; break; case Opt_journal_dev: if (is_remount) { printk(KERN_ERR "EXT3-fs: cannot specify " "journal on remount\n"); return 0; } if (match_int(&args[0], &option)) return 0; *journal_devnum = option; break; case Opt_noload: set_opt (sbi->s_mount_opt, NOLOAD); break; case Opt_commit: if (match_int(&args[0], &option)) return 0; if (option < 0) return 0; if (option == 0) option = JBD_DEFAULT_MAX_COMMIT_AGE; sbi->s_commit_interval = HZ * option; break; case Opt_data_journal: data_opt = EXT3_MOUNT_JOURNAL_DATA; goto datacheck; case Opt_data_ordered: data_opt = EXT3_MOUNT_ORDERED_DATA; goto datacheck; case Opt_data_writeback: data_opt = EXT3_MOUNT_WRITEBACK_DATA; datacheck: if (is_remount) { if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS) != data_opt) { printk(KERN_ERR "EXT3-fs: cannot change data " "mode on remount\n"); return 0; } } else { sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS; sbi->s_mount_opt |= data_opt; } break; #ifdef CONFIG_QUOTA case Opt_usrjquota: qtype = USRQUOTA; goto set_qf_name; case Opt_grpjquota: qtype = GRPQUOTA; set_qf_name: if (sb_any_quota_enabled(sb)) { printk(KERN_ERR "EXT3-fs: Cannot change journalled " "quota options when quota turned on.\n"); return 0; } qname = match_strdup(&args[0]); if (!qname) { printk(KERN_ERR "EXT3-fs: not enough memory for " "storing quotafile name.\n"); return 0; } if (sbi->s_qf_names[qtype] && strcmp(sbi->s_qf_names[qtype], qname)) { printk(KERN_ERR "EXT3-fs: %s quota file already " "specified.\n", QTYPE2NAME(qtype)); kfree(qname); return 0; } sbi->s_qf_names[qtype] = qname; if (strchr(sbi->s_qf_names[qtype], '/')) { printk(KERN_ERR "EXT3-fs: quotafile must be on " "filesystem root.\n"); kfree(sbi->s_qf_names[qtype]); sbi->s_qf_names[qtype] = NULL; return 0; } set_opt(sbi->s_mount_opt, QUOTA); break; case Opt_offusrjquota: qtype = USRQUOTA; goto clear_qf_name; case Opt_offgrpjquota: qtype = GRPQUOTA; clear_qf_name: if (sb_any_quota_enabled(sb)) { printk(KERN_ERR "EXT3-fs: Cannot change " "journalled quota options when " "quota turned on.\n"); return 0; } /* * The space will be released later when all options * are confirmed to be correct */ sbi->s_qf_names[qtype] = NULL; break; case Opt_jqfmt_vfsold: sbi->s_jquota_fmt = QFMT_VFS_OLD; break; case Opt_jqfmt_vfsv0: sbi->s_jquota_fmt = QFMT_VFS_V0; break; case Opt_quota: case Opt_usrquota: set_opt(sbi->s_mount_opt, QUOTA); set_opt(sbi->s_mount_opt, USRQUOTA); break; case Opt_grpquota: set_opt(sbi->s_mount_opt, QUOTA); set_opt(sbi->s_mount_opt, GRPQUOTA); break; case Opt_noquota: if (sb_any_quota_enabled(sb)) { printk(KERN_ERR "EXT3-fs: Cannot change quota " "options when quota turned on.\n"); return 0; } clear_opt(sbi->s_mount_opt, QUOTA); clear_opt(sbi->s_mount_opt, USRQUOTA); clear_opt(sbi->s_mount_opt, GRPQUOTA); break; #else case Opt_quota: case Opt_usrquota: case Opt_grpquota: case Opt_usrjquota: case Opt_grpjquota: case Opt_offusrjquota: case Opt_offgrpjquota: case Opt_jqfmt_vfsold: case Opt_jqfmt_vfsv0: printk(KERN_ERR "EXT3-fs: journalled quota options not " "supported.\n"); break; case Opt_noquota: break; #endif case Opt_abort: set_opt(sbi->s_mount_opt, ABORT); break; case Opt_barrier: if (match_int(&args[0], &option)) return 0; if (option) set_opt(sbi->s_mount_opt, BARRIER); else clear_opt(sbi->s_mount_opt, BARRIER); break; case Opt_ignore: break; case Opt_resize: if (!is_remount) { printk("EXT3-fs: resize option only available " "for remount\n"); return 0; } if (match_int(&args[0], &option) != 0) return 0; *n_blocks_count = option; break; case Opt_nobh: set_opt(sbi->s_mount_opt, NOBH); break; case Opt_bh: clear_opt(sbi->s_mount_opt, NOBH); break; default: printk (KERN_ERR "EXT3-fs: Unrecognized mount option \"%s\" " "or missing value\n", p); return 0; } } #ifdef CONFIG_QUOTA if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) && sbi->s_qf_names[USRQUOTA]) clear_opt(sbi->s_mount_opt, USRQUOTA); if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) clear_opt(sbi->s_mount_opt, GRPQUOTA); if ((sbi->s_qf_names[USRQUOTA] && (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) || (sbi->s_qf_names[GRPQUOTA] && (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) { printk(KERN_ERR "EXT3-fs: old and new quota " "format mixing.\n"); return 0; } if (!sbi->s_jquota_fmt) { printk(KERN_ERR "EXT3-fs: journalled quota format " "not specified.\n"); return 0; } } else { if (sbi->s_jquota_fmt) { printk(KERN_ERR "EXT3-fs: journalled quota format " "specified with no journalling " "enabled.\n"); return 0; } } #endif return 1; } static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, int read_only) { struct ext3_sb_info *sbi = EXT3_SB(sb); int res = 0; if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { printk (KERN_ERR "EXT3-fs warning: revision level too high, " "forcing read-only mode\n"); res = MS_RDONLY; } if (read_only) return res; if (!(sbi->s_mount_state & EXT3_VALID_FS)) printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, " "running e2fsck is recommended\n"); else if ((sbi->s_mount_state & EXT3_ERROR_FS)) printk (KERN_WARNING "EXT3-fs warning: mounting fs with errors, " "running e2fsck is recommended\n"); else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && le16_to_cpu(es->s_mnt_count) >= (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) printk (KERN_WARNING "EXT3-fs warning: maximal mount count reached, " "running e2fsck is recommended\n"); else if (le32_to_cpu(es->s_checkinterval) && (le32_to_cpu(es->s_lastcheck) + le32_to_cpu(es->s_checkinterval) <= get_seconds())) printk (KERN_WARNING "EXT3-fs warning: checktime reached, " "running e2fsck is recommended\n"); #if 0 /* @@@ We _will_ want to clear the valid bit if we find inconsistencies, to force a fsck at reboot. But for a plain journaled filesystem we can keep it set as valid forever! :) */ es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT3_VALID_FS); #endif if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); es->s_mtime = cpu_to_le32(get_seconds()); ext3_update_dynamic_rev(sb); EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); ext3_commit_super(sb, es, 1); if (test_opt(sb, DEBUG)) printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, " "bpg=%lu, ipg=%lu, mo=%04lx]\n", sb->s_blocksize, sbi->s_groups_count, EXT3_BLOCKS_PER_GROUP(sb), EXT3_INODES_PER_GROUP(sb), sbi->s_mount_opt); printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id); if (EXT3_SB(sb)->s_journal->j_inode == NULL) { char b[BDEVNAME_SIZE]; printk("external journal on %s\n", bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); } else { printk("internal journal\n"); } return res; } /* Called at mount-time, super-block is locked */ static int ext3_check_descriptors (struct super_block * sb) { struct ext3_sb_info *sbi = EXT3_SB(sb); ext3_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); ext3_fsblk_t last_block; struct ext3_group_desc * gdp = NULL; int desc_block = 0; int i; ext3_debug ("Checking group descriptors"); for (i = 0; i < sbi->s_groups_count; i++) { if (i == sbi->s_groups_count - 1) last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; else last_block = first_block + (EXT3_BLOCKS_PER_GROUP(sb) - 1); if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0) gdp = (struct ext3_group_desc *) sbi->s_group_desc[desc_block++]->b_data; if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || le32_to_cpu(gdp->bg_block_bitmap) > last_block) { ext3_error (sb, "ext3_check_descriptors", "Block bitmap for group %d" " not in group (block %lu)!", i, (unsigned long) le32_to_cpu(gdp->bg_block_bitmap)); return 0; } if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || le32_to_cpu(gdp->bg_inode_bitmap) > last_block) { ext3_error (sb, "ext3_check_descriptors", "Inode bitmap for group %d" " not in group (block %lu)!", i, (unsigned long) le32_to_cpu(gdp->bg_inode_bitmap)); return 0; } if (le32_to_cpu(gdp->bg_inode_table) < first_block || le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group > last_block) { ext3_error (sb, "ext3_check_descriptors", "Inode table for group %d" " not in group (block %lu)!", i, (unsigned long) le32_to_cpu(gdp->bg_inode_table)); return 0; } first_block += EXT3_BLOCKS_PER_GROUP(sb); gdp++; } sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); return 1; } /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at * the superblock) which were deleted from all directories, but held open by * a process at the time of a crash. We walk the list and try to delete these * inodes at recovery time (only with a read-write filesystem). * * In order to keep the orphan inode chain consistent during traversal (in * case of crash during recovery), we link each inode into the superblock * orphan list_head and handle it the same way as an inode deletion during * normal operation (which journals the operations for us). * * We only do an iget() and an iput() on each inode, which is very safe if we * accidentally point at an in-use or already deleted inode. The worst that * can happen in this case is that we get a "bit already cleared" message from * ext3_free_inode(). The only reason we would point at a wrong inode is if * e2fsck was run on this filesystem, and it must have already done the orphan * inode cleanup for us, so we can safely abort without any further action. */ static void ext3_orphan_cleanup (struct super_block * sb, struct ext3_super_block * es) { unsigned int s_flags = sb->s_flags; int nr_orphans = 0, nr_truncates = 0; #ifdef CONFIG_QUOTA int i; #endif if (!es->s_last_orphan) { jbd_debug(4, "no orphan inodes to clean up\n"); return; } if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { if (es->s_last_orphan) jbd_debug(1, "Errors on filesystem, " "clearing orphan list.\n"); es->s_last_orphan = 0; jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); return; } if (s_flags & MS_RDONLY) { printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n", sb->s_id); sb->s_flags &= ~MS_RDONLY; } #ifdef CONFIG_QUOTA /* Needed for iput() to work correctly and not trash data */ sb->s_flags |= MS_ACTIVE; /* Turn on quotas so that they are updated correctly */ for (i = 0; i < MAXQUOTAS; i++) { if (EXT3_SB(sb)->s_qf_names[i]) { int ret = ext3_quota_on_mount(sb, i); if (ret < 0) printk(KERN_ERR "EXT3-fs: Cannot turn on journalled " "quota: error %d\n", ret); } } #endif while (es->s_last_orphan) { struct inode *inode; if (!(inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { es->s_last_orphan = 0; break; } list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); DQUOT_INIT(inode); if (inode->i_nlink) { printk(KERN_DEBUG "%s: truncating inode %lu to %Ld bytes\n", __FUNCTION__, inode->i_ino, inode->i_size); jbd_debug(2, "truncating inode %lu to %Ld bytes\n", inode->i_ino, inode->i_size); ext3_truncate(inode); nr_truncates++; } else { printk(KERN_DEBUG "%s: deleting unreferenced inode %lu\n", __FUNCTION__, inode->i_ino); jbd_debug(2, "deleting unreferenced inode %lu\n", inode->i_ino); nr_orphans++; } iput(inode); /* The delete magic happens here! */ } #define PLURAL(x) (x), ((x)==1) ? "" : "s" if (nr_orphans) printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n", sb->s_id, PLURAL(nr_orphans)); if (nr_truncates) printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n", sb->s_id, PLURAL(nr_truncates)); #ifdef CONFIG_QUOTA /* Turn quotas off */ for (i = 0; i < MAXQUOTAS; i++) { if (sb_dqopt(sb)->files[i]) vfs_quota_off(sb, i); } #endif sb->s_flags = s_flags; /* Restore MS_RDONLY status */ } #define log2(n) ffz(~(n)) /* * Maximal file size. There is a direct, and {,double-,triple-}indirect * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. * We need to be 1 filesystem block less than the 2^32 sector limit. */ static loff_t ext3_max_size(int bits) { loff_t res = EXT3_NDIR_BLOCKS; /* This constant is calculated to be the largest file size for a * dense, 4k-blocksize file such that the total number of * sectors in the file, including data and all indirect blocks, * does not exceed 2^32. */ const loff_t upper_limit = 0x1ff7fffd000LL; res += 1LL << (bits-2); res += 1LL << (2*(bits-2)); res += 1LL << (3*(bits-2)); res <<= bits; if (res > upper_limit) res = upper_limit; return res; } static ext3_fsblk_t descriptor_loc(struct super_block *sb, ext3_fsblk_t logic_sb_block, int nr) { struct ext3_sb_info *sbi = EXT3_SB(sb); unsigned long bg, first_meta_bg; int has_super = 0; first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || nr < first_meta_bg) return (logic_sb_block + nr + 1); bg = sbi->s_desc_per_block * nr; if (ext3_bg_has_super(sb, bg)) has_super = 1; return (has_super + ext3_group_first_block_no(sb, bg)); } static int ext3_fill_super (struct super_block *sb, void *data, int silent) { struct buffer_head * bh; struct ext3_super_block *es = NULL; struct ext3_sb_info *sbi; ext3_fsblk_t block; ext3_fsblk_t sb_block = get_sb_block(&data); ext3_fsblk_t logic_sb_block; unsigned long offset = 0; unsigned int journal_inum = 0; unsigned long journal_devnum = 0; unsigned long def_mount_opts; struct inode *root; int blocksize; int hblock; int db_count; int i; int needs_recovery; __le32 features; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; sb->s_fs_info = sbi; sbi->s_mount_opt = 0; sbi->s_resuid = EXT3_DEF_RESUID; sbi->s_resgid = EXT3_DEF_RESGID; unlock_kernel(); blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); if (!blocksize) { printk(KERN_ERR "EXT3-fs: unable to set blocksize\n"); goto out_fail; } /* * The ext3 superblock will not be buffer aligned for other than 1kB * block sizes. We need to calculate the offset from buffer start. */ if (blocksize != EXT3_MIN_BLOCK_SIZE) { logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; } else { logic_sb_block = sb_block; } if (!(bh = sb_bread(sb, logic_sb_block))) { printk (KERN_ERR "EXT3-fs: unable to read superblock\n"); goto out_fail; } /* * Note: s_es must be initialized as soon as possible because * some ext3 macro-instructions depend on its value */ es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); sbi->s_es = es; sb->s_magic = le16_to_cpu(es->s_magic); if (sb->s_magic != EXT3_SUPER_MAGIC) goto cantfind_ext3; /* Set defaults before we parse the mount options */ def_mount_opts = le32_to_cpu(es->s_default_mount_opts); if (def_mount_opts & EXT3_DEFM_DEBUG) set_opt(sbi->s_mount_opt, DEBUG); if (def_mount_opts & EXT3_DEFM_BSDGROUPS) set_opt(sbi->s_mount_opt, GRPID); if (def_mount_opts & EXT3_DEFM_UID16) set_opt(sbi->s_mount_opt, NO_UID32); if (def_mount_opts & EXT3_DEFM_XATTR_USER) set_opt(sbi->s_mount_opt, XATTR_USER); if (def_mount_opts & EXT3_DEFM_ACL) set_opt(sbi->s_mount_opt, POSIX_ACL); if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA; else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA; else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA; if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) set_opt(sbi->s_mount_opt, ERRORS_PANIC); else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_RO) set_opt(sbi->s_mount_opt, ERRORS_RO); else set_opt(sbi->s_mount_opt, ERRORS_CONT); sbi->s_resuid = le16_to_cpu(es->s_def_resuid); sbi->s_resgid = le16_to_cpu(es->s_def_resgid); set_opt(sbi->s_mount_opt, RESERVATION); if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, NULL, 0)) goto failed_mount; sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) printk(KERN_WARNING "EXT3-fs warning: feature flags set on rev 0 fs, " "running e2fsck is recommended\n"); /* * Check feature flags regardless of the revision level, since we * previously didn't change the revision level when setting the flags, * so there is a chance incompat flags are set on a rev 0 filesystem. */ features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); if (features) { printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of " "unsupported optional features (%x).\n", sb->s_id, le32_to_cpu(features)); goto failed_mount; } features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); if (!(sb->s_flags & MS_RDONLY) && features) { printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of " "unsupported optional features (%x).\n", sb->s_id, le32_to_cpu(features)); goto failed_mount; } blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); if (blocksize < EXT3_MIN_BLOCK_SIZE || blocksize > EXT3_MAX_BLOCK_SIZE) { printk(KERN_ERR "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n", blocksize, sb->s_id); goto failed_mount; } hblock = bdev_hardsect_size(sb->s_bdev); if (sb->s_blocksize != blocksize) { /* * Make sure the blocksize for the filesystem is larger * than the hardware sectorsize for the machine. */ if (blocksize < hblock) { printk(KERN_ERR "EXT3-fs: blocksize %d too small for " "device blocksize %d.\n", blocksize, hblock); goto failed_mount; } brelse (bh); sb_set_blocksize(sb, blocksize); logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; bh = sb_bread(sb, logic_sb_block); if (!bh) { printk(KERN_ERR "EXT3-fs: Can't read superblock on 2nd try.\n"); goto failed_mount; } es = (struct ext3_super_block *)(((char *)bh->b_data) + offset); sbi->s_es = es; if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { printk (KERN_ERR "EXT3-fs: Magic mismatch, very weird !\n"); goto failed_mount; } } sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; } else { sbi->s_inode_size = le16_to_cpu(es->s_inode_size); sbi->s_first_ino = le32_to_cpu(es->s_first_ino); if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || (sbi->s_inode_size & (sbi->s_inode_size - 1)) || (sbi->s_inode_size > blocksize)) { printk (KERN_ERR "EXT3-fs: unsupported inode size: %d\n", sbi->s_inode_size); goto failed_mount; } } sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << le32_to_cpu(es->s_log_frag_size); if (blocksize != sbi->s_frag_size) { printk(KERN_ERR "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n", sbi->s_frag_size, blocksize); goto failed_mount; } sbi->s_frags_per_block = 1; sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); if (EXT3_INODE_SIZE(sb) == 0) goto cantfind_ext3; sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); if (sbi->s_inodes_per_block == 0) goto cantfind_ext3; sbi->s_itb_per_group = sbi->s_inodes_per_group / sbi->s_inodes_per_block; sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); sbi->s_sbh = bh; sbi->s_mount_state = le16_to_cpu(es->s_state); sbi->s_addr_per_block_bits = log2(EXT3_ADDR_PER_BLOCK(sb)); sbi->s_desc_per_block_bits = log2(EXT3_DESC_PER_BLOCK(sb)); for (i=0; i < 4; i++) sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); sbi->s_def_hash_version = es->s_def_hash_version; if (sbi->s_blocks_per_group > blocksize * 8) { printk (KERN_ERR "EXT3-fs: #blocks per group too big: %lu\n", sbi->s_blocks_per_group); goto failed_mount; } if (sbi->s_frags_per_group > blocksize * 8) { printk (KERN_ERR "EXT3-fs: #fragments per group too big: %lu\n", sbi->s_frags_per_group); goto failed_mount; } if (sbi->s_inodes_per_group > blocksize * 8) { printk (KERN_ERR "EXT3-fs: #inodes per group too big: %lu\n", sbi->s_inodes_per_group); goto failed_mount; } if (le32_to_cpu(es->s_blocks_count) > (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { printk(KERN_ERR "EXT3-fs: filesystem on %s:" " too large to mount safely\n", sb->s_id); if (sizeof(sector_t) < 8) printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not " "enabled\n"); goto failed_mount; } if (EXT3_BLOCKS_PER_GROUP(sb) == 0) goto cantfind_ext3; sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - le32_to_cpu(es->s_first_data_block) - 1) / EXT3_BLOCKS_PER_GROUP(sb)) + 1; db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) / EXT3_DESC_PER_BLOCK(sb); sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), GFP_KERNEL); if (sbi->s_group_desc == NULL) { printk (KERN_ERR "EXT3-fs: not enough memory\n"); goto failed_mount; } bgl_lock_init(&sbi->s_blockgroup_lock); for (i = 0; i < db_count; i++) { block = descriptor_loc(sb, logic_sb_block, i); sbi->s_group_desc[i] = sb_bread(sb, block); if (!sbi->s_group_desc[i]) { printk (KERN_ERR "EXT3-fs: " "can't read group descriptor %d\n", i); db_count = i; goto failed_mount2; } } if (!ext3_check_descriptors (sb)) { printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n"); goto failed_mount2; } sbi->s_gdb_count = db_count; get_random_bytes(&sbi->s_next_generation, sizeof(u32)); spin_lock_init(&sbi->s_next_gen_lock); percpu_counter_init(&sbi->s_freeblocks_counter, ext3_count_free_blocks(sb)); percpu_counter_init(&sbi->s_freeinodes_counter, ext3_count_free_inodes(sb)); percpu_counter_init(&sbi->s_dirs_counter, ext3_count_dirs(sb)); /* per fileystem reservation list head & lock */ spin_lock_init(&sbi->s_rsv_window_lock); sbi->s_rsv_window_root = RB_ROOT; /* Add a single, static dummy reservation to the start of the * reservation window list --- it gives us a placeholder for * append-at-start-of-list which makes the allocation logic * _much_ simpler. */ sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; sbi->s_rsv_window_head.rsv_alloc_hit = 0; sbi->s_rsv_window_head.rsv_goal_size = 0; ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); /* * set up enough so that it can read an inode */ sb->s_op = &ext3_sops; sb->s_export_op = &ext3_export_ops; sb->s_xattr = ext3_xattr_handlers; #ifdef CONFIG_QUOTA sb->s_qcop = &ext3_qctl_operations; sb->dq_op = &ext3_quota_operations; #endif INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ sb->s_root = NULL; needs_recovery = (es->s_last_orphan != 0 || EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)); /* * The first inode we look at is the journal inode. Don't try * root first: it may be modified in the journal! */ if (!test_opt(sb, NOLOAD) && EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { if (ext3_load_journal(sb, es, journal_devnum)) goto failed_mount3; } else if (journal_inum) { if (ext3_create_journal(sb, es, journal_inum)) goto failed_mount3; } else { if (!silent) printk (KERN_ERR "ext3: No journal on filesystem on %s\n", sb->s_id); goto failed_mount3; } /* We have now updated the journal if required, so we can * validate the data journaling mode. */ switch (test_opt(sb, DATA_FLAGS)) { case 0: /* No mode set, assume a default based on the journal capabilities: ORDERED_DATA if the journal can cope, else JOURNAL_DATA */ if (journal_check_available_features (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) set_opt(sbi->s_mount_opt, ORDERED_DATA); else set_opt(sbi->s_mount_opt, JOURNAL_DATA); break; case EXT3_MOUNT_ORDERED_DATA: case EXT3_MOUNT_WRITEBACK_DATA: if (!journal_check_available_features (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { printk(KERN_ERR "EXT3-fs: Journal does not support " "requested data journaling mode\n"); goto failed_mount4; } default: break; } if (test_opt(sb, NOBH)) { if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) { printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - " "its supported only with writeback mode\n"); clear_opt(sbi->s_mount_opt, NOBH); } } /* * The journal_load will have done any necessary log recovery, * so we can safely mount the rest of the filesystem now. */ root = iget(sb, EXT3_ROOT_INO); sb->s_root = d_alloc_root(root); if (!sb->s_root) { printk(KERN_ERR "EXT3-fs: get root inode failed\n"); iput(root); goto failed_mount4; } if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { dput(sb->s_root); sb->s_root = NULL; printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n"); goto failed_mount4; } ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); /* * akpm: core read_super() calls in here with the superblock locked. * That deadlocks, because orphan cleanup needs to lock the superblock * in numerous places. Here we just pop the lock - it's relatively * harmless, because we are now ready to accept write_super() requests, * and aviro says that's the only reason for hanging onto the * superblock lock. */ EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; ext3_orphan_cleanup(sb, es); EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; if (needs_recovery) printk (KERN_INFO "EXT3-fs: recovery complete.\n"); ext3_mark_recovery_complete(sb, es); printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n", test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": "writeback"); lock_kernel(); return 0; cantfind_ext3: if (!silent) printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n", sb->s_id); goto failed_mount; failed_mount4: journal_destroy(sbi->s_journal); failed_mount3: percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); failed_mount2: for (i = 0; i < db_count; i++) brelse(sbi->s_group_desc[i]); kfree(sbi->s_group_desc); failed_mount: #ifdef CONFIG_QUOTA for (i = 0; i < MAXQUOTAS; i++) kfree(sbi->s_qf_names[i]); #endif ext3_blkdev_remove(sbi); brelse(bh); out_fail: sb->s_fs_info = NULL; kfree(sbi); lock_kernel(); return -EINVAL; } /* * Setup any per-fs journal parameters now. We'll do this both on * initial mount, once the journal has been initialised but before we've * done any recovery; and again on any subsequent remount. */ static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) { struct ext3_sb_info *sbi = EXT3_SB(sb); if (sbi->s_commit_interval) journal->j_commit_interval = sbi->s_commit_interval; /* We could also set up an ext3-specific default for the commit * interval here, but for now we'll just fall back to the jbd * default. */ spin_lock(&journal->j_state_lock); if (test_opt(sb, BARRIER)) journal->j_flags |= JFS_BARRIER; else journal->j_flags &= ~JFS_BARRIER; spin_unlock(&journal->j_state_lock); } static journal_t *ext3_get_journal(struct super_block *sb, unsigned int journal_inum) { struct inode *journal_inode; journal_t *journal; /* First, test for the existence of a valid inode on disk. Bad * things happen if we iget() an unused inode, as the subsequent * iput() will try to delete it. */ journal_inode = iget(sb, journal_inum); if (!journal_inode) { printk(KERN_ERR "EXT3-fs: no journal found.\n"); return NULL; } if (!journal_inode->i_nlink) { make_bad_inode(journal_inode); iput(journal_inode); printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n"); return NULL; } jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", journal_inode, journal_inode->i_size); if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { printk(KERN_ERR "EXT3-fs: invalid journal inode.\n"); iput(journal_inode); return NULL; } journal = journal_init_inode(journal_inode); if (!journal) { printk(KERN_ERR "EXT3-fs: Could not load journal inode\n"); iput(journal_inode); return NULL; } journal->j_private = sb; ext3_init_journal_params(sb, journal); return journal; } static journal_t *ext3_get_dev_journal(struct super_block *sb, dev_t j_dev) { struct buffer_head * bh; journal_t *journal; ext3_fsblk_t start; ext3_fsblk_t len; int hblock, blocksize; ext3_fsblk_t sb_block; unsigned long offset; struct ext3_super_block * es; struct block_device *bdev; bdev = ext3_blkdev_get(j_dev); if (bdev == NULL) return NULL; if (bd_claim(bdev, sb)) { printk(KERN_ERR "EXT3: failed to claim external journal device.\n"); blkdev_put(bdev); return NULL; } blocksize = sb->s_blocksize; hblock = bdev_hardsect_size(bdev); if (blocksize < hblock) { printk(KERN_ERR "EXT3-fs: blocksize too small for journal device.\n"); goto out_bdev; } sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; offset = EXT3_MIN_BLOCK_SIZE % blocksize; set_blocksize(bdev, blocksize); if (!(bh = __bread(bdev, sb_block, blocksize))) { printk(KERN_ERR "EXT3-fs: couldn't read superblock of " "external journal\n"); goto out_bdev; } es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || !(le32_to_cpu(es->s_feature_incompat) & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { printk(KERN_ERR "EXT3-fs: external journal has " "bad superblock\n"); brelse(bh); goto out_bdev; } if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { printk(KERN_ERR "EXT3-fs: journal UUID does not match\n"); brelse(bh); goto out_bdev; } len = le32_to_cpu(es->s_blocks_count); start = sb_block + 1; brelse(bh); /* we're done with the superblock */ journal = journal_init_dev(bdev, sb->s_bdev, start, len, blocksize); if (!journal) { printk(KERN_ERR "EXT3-fs: failed to create device journal\n"); goto out_bdev; } journal->j_private = sb; ll_rw_block(READ, 1, &journal->j_sb_buffer); wait_on_buffer(journal->j_sb_buffer); if (!buffer_uptodate(journal->j_sb_buffer)) { printk(KERN_ERR "EXT3-fs: I/O error on journal device\n"); goto out_journal; } if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { printk(KERN_ERR "EXT3-fs: External journal has more than one " "user (unsupported) - %d\n", be32_to_cpu(journal->j_superblock->s_nr_users)); goto out_journal; } EXT3_SB(sb)->journal_bdev = bdev; ext3_init_journal_params(sb, journal); return journal; out_journal: journal_destroy(journal); out_bdev: ext3_blkdev_put(bdev); return NULL; } static int ext3_load_journal(struct super_block *sb, struct ext3_super_block *es, unsigned long journal_devnum) { journal_t *journal; unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); dev_t journal_dev; int err = 0; int really_read_only; if (journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { printk(KERN_INFO "EXT3-fs: external journal device major/minor " "numbers have changed\n"); journal_dev = new_decode_dev(journal_devnum); } else journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); really_read_only = bdev_read_only(sb->s_bdev); /* * Are we loading a blank journal or performing recovery after a * crash? For recovery, we need to check in advance whether we * can get read-write access to the device. */ if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { if (sb->s_flags & MS_RDONLY) { printk(KERN_INFO "EXT3-fs: INFO: recovery " "required on readonly filesystem.\n"); if (really_read_only) { printk(KERN_ERR "EXT3-fs: write access " "unavailable, cannot proceed.\n"); return -EROFS; } printk (KERN_INFO "EXT3-fs: write access will " "be enabled during recovery.\n"); } } if (journal_inum && journal_dev) { printk(KERN_ERR "EXT3-fs: filesystem has both journal " "and inode journals!\n"); return -EINVAL; } if (journal_inum) { if (!(journal = ext3_get_journal(sb, journal_inum))) return -EINVAL; } else { if (!(journal = ext3_get_dev_journal(sb, journal_dev))) return -EINVAL; } if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { err = journal_update_format(journal); if (err) { printk(KERN_ERR "EXT3-fs: error updating journal.\n"); journal_destroy(journal); return err; } } if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) err = journal_wipe(journal, !really_read_only); if (!err) err = journal_load(journal); if (err) { printk(KERN_ERR "EXT3-fs: error loading journal.\n"); journal_destroy(journal); return err; } EXT3_SB(sb)->s_journal = journal; ext3_clear_journal_err(sb, es); if (journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { es->s_journal_dev = cpu_to_le32(journal_devnum); sb->s_dirt = 1; /* Make sure we flush the recovery flag to disk. */ ext3_commit_super(sb, es, 1); } return 0; } static int ext3_create_journal(struct super_block * sb, struct ext3_super_block * es, unsigned int journal_inum) { journal_t *journal; if (sb->s_flags & MS_RDONLY) { printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to " "create journal.\n"); return -EROFS; } if (!(journal = ext3_get_journal(sb, journal_inum))) return -EINVAL; printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n", journal_inum); if (journal_create(journal)) { printk(KERN_ERR "EXT3-fs: error creating journal.\n"); journal_destroy(journal); return -EIO; } EXT3_SB(sb)->s_journal = journal; ext3_update_dynamic_rev(sb); EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); es->s_journal_inum = cpu_to_le32(journal_inum); sb->s_dirt = 1; /* Make sure we flush the recovery flag to disk. */ ext3_commit_super(sb, es, 1); return 0; } static void ext3_commit_super (struct super_block * sb, struct ext3_super_block * es, int sync) { struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; if (!sbh) return; es->s_wtime = cpu_to_le32(get_seconds()); es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); BUFFER_TRACE(sbh, "marking dirty"); mark_buffer_dirty(sbh); if (sync) sync_dirty_buffer(sbh); } /* * Have we just finished recovery? If so, and if we are mounting (or * remounting) the filesystem readonly, then we will end up with a * consistent fs on disk. Record that fact. */ static void ext3_mark_recovery_complete(struct super_block * sb, struct ext3_super_block * es) { journal_t *journal = EXT3_SB(sb)->s_journal; journal_lock_updates(journal); journal_flush(journal); if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && sb->s_flags & MS_RDONLY) { EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); sb->s_dirt = 0; ext3_commit_super(sb, es, 1); } journal_unlock_updates(journal); } /* * If we are mounting (or read-write remounting) a filesystem whose journal * has recorded an error from a previous lifetime, move that error to the * main filesystem now. */ static void ext3_clear_journal_err(struct super_block * sb, struct ext3_super_block * es) { journal_t *journal; int j_errno; const char *errstr; journal = EXT3_SB(sb)->s_journal; /* * Now check for any error status which may have been recorded in the * journal by a prior ext3_error() or ext3_abort() */ j_errno = journal_errno(journal); if (j_errno) { char nbuf[16]; errstr = ext3_decode_error(sb, j_errno, nbuf); ext3_warning(sb, __FUNCTION__, "Filesystem error recorded " "from previous mount: %s", errstr); ext3_warning(sb, __FUNCTION__, "Marking fs in need of " "filesystem check."); EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; es->s_state |= cpu_to_le16(EXT3_ERROR_FS); ext3_commit_super (sb, es, 1); journal_clear_err(journal); } } /* * Force the running and committing transactions to commit, * and wait on the commit. */ int ext3_force_commit(struct super_block *sb) { journal_t *journal; int ret; if (sb->s_flags & MS_RDONLY) return 0; journal = EXT3_SB(sb)->s_journal; sb->s_dirt = 0; ret = ext3_journal_force_commit(journal); return ret; } /* * Ext3 always journals updates to the superblock itself, so we don't * have to propagate any other updates to the superblock on disk at this * point. Just start an async writeback to get the buffers on their way * to the disk. * * This implicitly triggers the writebehind on sync(). */ static void ext3_write_super (struct super_block * sb) { if (mutex_trylock(&sb->s_lock) != 0) BUG(); sb->s_dirt = 0; } static int ext3_sync_fs(struct super_block *sb, int wait) { tid_t target; sb->s_dirt = 0; if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { if (wait) log_wait_commit(EXT3_SB(sb)->s_journal, target); } return 0; } /* * LVM calls this function before a (read-only) snapshot is created. This * gives us a chance to flush the journal completely and mark the fs clean.