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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...
span> goto err_out_put; netfs_trans_finish(t, POHMELFS_SB(inode->i_sb)); return 0; err_out_put: t->result = err; netfs_trans_put(t); err_out_exit: return err; } /* * Sync all not-yet-created children in given directory to the server. */ static int pohmelfs_write_inode_create_children(struct inode *inode) { struct pohmelfs_inode *parent = POHMELFS_I(inode); struct super_block *sb = inode->i_sb; struct pohmelfs_name *n; while (!list_empty(&parent->sync_create_list)) { n = NULL; mutex_lock(&parent->offset_lock); if (!list_empty(&parent->sync_create_list)) { n = list_first_entry(&parent->sync_create_list, struct pohmelfs_name, sync_create_entry); list_del_init(&n->sync_create_entry); } mutex_unlock(&parent->offset_lock); if (!n) break; inode = ilookup(sb, n->ino); dprintk("%s: parent: %llu, ino: %llu, inode: %p.\n", __func__, parent->ino, n->ino, inode); if (inode && (inode->i_state & I_DIRTY)) { struct pohmelfs_inode *pi = POHMELFS_I(inode); pohmelfs_write_create_inode(pi); //pohmelfs_meta_command(pi, NETFS_INODE_INFO, 0, NULL, NULL, 0); iput(inode); } } return 0; } /* * Removes given child from given inode on server. */ int pohmelfs_remove_child(struct pohmelfs_inode *pi, struct pohmelfs_name *n) { return pohmelfs_meta_command_data(pi, pi->ino, NETFS_REMOVE, NULL, 0, NULL, NULL, 0); } /* * Writeback for given inode. */ static int pohmelfs_write_inode(struct inode *inode, int sync) { struct pohmelfs_inode *pi = POHMELFS_I(inode); pohmelfs_write_create_inode(pi); pohmelfs_write_inode_create_children(inode); return 0; } /* * It is not exported, sorry... */ static inline wait_queue_head_t *page_waitqueue(struct page *page) { const struct zone *zone = page_zone(page); return &zone->wait_table[hash_ptr(page, zone->wait_table_bits)]; } static int pohmelfs_wait_on_page_locked(struct page *page) { struct pohmelfs_sb *psb = POHMELFS_SB(page->mapping->host->i_sb); long ret = psb->wait_on_page_timeout; DEFINE_WAIT_BIT(wait, &page->flags, PG_locked); int err = 0; if (!PageLocked(page)) return 0; for (;;) { prepare_to_wait(page_waitqueue(page), &wait.wait, TASK_INTERRUPTIBLE); dprintk("%s: page: %p, locked: %d, uptodate: %d, error: %d, flags: %lx.\n", __func__, page, PageLocked(page), PageUptodate(page), PageError(page), page->flags); if (!PageLocked(page)) break; if (!signal_pending(current)) { ret = schedule_timeout(ret); if (!ret) break; continue; } ret = -ERESTARTSYS; break; } finish_wait(page_waitqueue(page), &wait.wait); if (!ret) err = -ETIMEDOUT; if (!err) SetPageUptodate(page); if (err) printk("%s: page: %p, uptodate: %d, locked: %d, err: %d.\n", __func__, page, PageUptodate(page), PageLocked(page), err); return err; } static int pohmelfs_read_page_complete(struct page **pages, unsigned int page_num, void *private, int err) { struct page *page = private; if (PageChecked(page)) return err; if (err < 0) { dprintk("%s: page: %p, err: %d.\n", __func__, page, err); SetPageError(page); } unlock_page(page); return err; } /* * Read a page from remote server. * Function will wait until page is unlocked. */ static int pohmelfs_readpage(struct file *file, struct page *page) { struct inode *inode = page->mapping->host; struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); struct pohmelfs_inode *pi = POHMELFS_I(inode); struct netfs_trans *t; struct netfs_cmd *cmd; int err, path_len; void *data; u64 isize; err = pohmelfs_data_lock(pi, page->index << PAGE_CACHE_SHIFT, PAGE_SIZE, POHMELFS_READ_LOCK); if (err) goto err_out_exit; isize = i_size_read(inode); if (isize <= page->index << PAGE_CACHE_SHIFT) { SetPageUptodate(page); unlock_page(page); return 0; } path_len = pohmelfs_path_length(pi); if (path_len < 0) { err = path_len; goto err_out_exit; } t = netfs_trans_alloc(psb, path_len, NETFS_TRANS_SINGLE_DST, 0); if (!t) { err = -ENOMEM; goto err_out_exit; } t->complete = pohmelfs_read_page_complete; t->private = page; cmd = netfs_trans_current(t); data = (void *)(cmd + 1); err = pohmelfs_construct_path_string(pi, data, path_len); if (err < 0) goto err_out_free; path_len = err; cmd->id = pi->ino; cmd->start = page->index; cmd->start <<= PAGE_CACHE_SHIFT; cmd->size = PAGE_CACHE_SIZE + path_len; cmd->cmd = NETFS_READ_PAGE; cmd->ext = path_len; dprintk("%s: path: '%s', page: %p, ino: %llu, start: %llu, size: %lu.\n", __func__, (char *)data, page, pi->ino, cmd->start, PAGE_CACHE_SIZE); netfs_convert_cmd(cmd); netfs_trans_update(cmd, t, path_len); err = netfs_trans_finish(t, psb); if (err) goto err_out_return; return pohmelfs_wait_on_page_locked(page); err_out_free: t->result = err; netfs_trans_put(t); err_out_exit: SetPageError(page); if (PageLocked(page)) unlock_page(page); err_out_return: printk("%s: page: %p, start: %lu, size: %lu, err: %d.\n", __func__, page, page->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE, err); return err; } /* * Write begin/end magic. * Allocates a page and writes inode if it was not synced to server before. */ static int pohmelfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) { struct inode *inode = mapping->host; struct page *page; pgoff_t index; unsigned start, end; int err; *pagep = NULL; index = pos >> PAGE_CACHE_SHIFT; start = pos & (PAGE_CACHE_SIZE - 1); end = start + len; page = grab_cache_page(mapping, index); #if 0 dprintk("%s: page: %p pos: %llu, len: %u, index: %lu, start: %u, end: %u, uptodate: %d.\n", __func__, page, pos, len, index, start, end, PageUptodate(page)); #endif if (!page) { err = -ENOMEM; goto err_out_exit; } while (!PageUptodate(page)) { if (start && test_bit(NETFS_INODE_REMOTE_SYNCED, &POHMELFS_I(inode)->state)) { err = pohmelfs_readpage(file, page); if (err) goto err_out_exit; lock_page(page); continue; } if (len != PAGE_CACHE_SIZE) { void *kaddr = kmap_atomic(page, KM_USER0); memset(kaddr + start, 0, PAGE_CACHE_SIZE - start); flush_dcache_page(page); kunmap_atomic(kaddr, KM_USER0); } SetPageUptodate(page); } set_page_private(page, end); *pagep = page; return 0; err_out_exit: page_cache_release(page); *pagep = NULL; return err; } static int pohmelfs_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) { struct inode *inode = mapping->host; if (copied != len) { unsigned from = pos & (PAGE_CACHE_SIZE - 1); void *kaddr = kmap_atomic(page, KM_USER0); memset(kaddr + from + copied, 0, len - copied); flush_dcache_page(page); kunmap_atomic(kaddr, KM_USER0); } SetPageUptodate(page); set_page_dirty(page); #if 0 dprintk("%s: page: %p [U: %d, D: %d, L: %d], pos: %llu, len: %u, copied: %u.\n", __func__, page, PageUptodate(page), PageDirty(page), PageLocked(page), pos, len, copied); #endif flush_dcache_page(page); unlock_page(page); page_cache_release(page); if (pos + copied > inode->i_size) { struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); psb->avail_size -= pos + copied - inode->i_size; i_size_write(inode, pos + copied); } return copied; } static int pohmelfs_readpages_trans_complete(struct page **__pages, unsigned int page_num, void *private, int err) { struct pohmelfs_inode *pi = private; unsigned int i, num; struct page **pages, *page = (struct page *)__pages; loff_t index = page->index; pages = kzalloc(sizeof(void *) * page_num, GFP_NOIO); if (!pages) return -ENOMEM; num = find_get_pages_contig(pi->vfs_inode.i_mapping, index, page_num, pages); if (num <= 0) { err = num; goto err_out_free; } for (i=0; i<num; ++i) { page = pages[i]; if (err) printk("%s: %u/%u: page: %p, index: %lu, uptodate: %d, locked: %d, err: %d.\n", __func__, i, num, page, page->index, PageUptodate(page), PageLocked(page), err); if (!PageChecked(page)) { if (err < 0) SetPageError(page); unlock_page(page); } page_cache_release(page); page_cache_release(page); } err_out_free: kfree(pages); return err; } static int pohmelfs_send_readpages(struct pohmelfs_inode *pi, struct page *first, unsigned int num) { struct netfs_trans *t; struct netfs_cmd *cmd; struct pohmelfs_sb *psb = POHMELFS_SB(pi->vfs_inode.i_sb); int err, path_len; void *data; err = pohmelfs_data_lock(pi, first->index << PAGE_CACHE_SHIFT, num * PAGE_SIZE, POHMELFS_READ_LOCK); if (err) goto err_out_exit; path_len = pohmelfs_path_length(pi); if (path_len < 0) { err = path_len; goto err_out_exit; } t = netfs_trans_alloc(psb, path_len, NETFS_TRANS_SINGLE_DST, 0); if (!t) { err = -ENOMEM; goto err_out_exit; } cmd = netfs_trans_current(t); data = (void *)(cmd + 1); t->complete = pohmelfs_readpages_trans_complete; t->private = pi; t->page_num = num; t->pages = (struct page **)first; err = pohmelfs_construct_path_string(pi, data, path_len); if (err < 0) goto err_out_put; path_len = err; cmd->cmd = NETFS_READ_PAGES; cmd->start = first->index; cmd->start <<= PAGE_CACHE_SHIFT; cmd->size = (num << 8 | PAGE_CACHE_SHIFT); cmd->id = pi->ino; cmd->ext = path_len; dprintk("%s: t: %p, gen: %u, path: '%s', path_len: %u, " "start: %lu, num: %u.\n", __func__, t, t->gen, (char *)data, path_len, first->index, num); netfs_convert_cmd(cmd); netfs_trans_update(cmd, t, path_len); return netfs_trans_finish(t, psb); err_out_put: netfs_trans_free(t); err_out_exit: pohmelfs_readpages_trans_complete((struct page **)first, num, pi, err); return err; } #define list_to_page(head) (list_entry((head)->prev, struct page, lru)) static int pohmelfs_readpages(struct file *file, struct address_space *mapping, struct list_head *pages, unsigned nr_pages) { unsigned int page_idx, num = 0; struct page *page = NULL, *first = NULL; for (page_idx = 0; page_idx < nr_pages; page_idx++) { page = list_to_page(pages); prefetchw(&page->flags); list_del(&page->lru); if (!add_to_page_cache_lru(page, mapping, page->index, GFP_KERNEL)) { if (!num) { num = 1; first = page; continue; } dprintk("%s: added to lru page: %p, page_index: %lu, first_index: %lu.\n", __func__, page, page->index, first->index); if (unlikely(first->index + num != page->index) || (num > 500)) { pohmelfs_send_readpages(POHMELFS_I(mapping->host), first, num); first = page; num = 0; } num++; } } pohmelfs_send_readpages(POHMELFS_I(mapping->host), first, num); /* * This will be sync read, so when last page is processed, * all previous are alerady unlocked and ready to be used. */ return 0; } /* * Small addres space operations for POHMELFS. */ const struct address_space_operations pohmelfs_aops = { .readpage = pohmelfs_readpage, .readpages = pohmelfs_readpages, .writepages = pohmelfs_writepages, .write_begin = pohmelfs_write_begin, .write_end = pohmelfs_write_end, .set_page_dirty = __set_page_dirty_nobuffers, }; /* * ->detroy_inode() callback. Deletes inode from the caches * and frees private data. */ static void pohmelfs_destroy_inode(struct inode *inode) { struct super_block *sb = inode->i_sb; struct pohmelfs_sb *psb = POHMELFS_SB(sb); struct pohmelfs_inode *pi = POHMELFS_I(inode); //pohmelfs_data_unlock(pi, 0, inode->i_size, POHMELFS_READ_LOCK); pohmelfs_inode_del_inode(psb, pi); dprintk("%s: pi: %p, inode: %p, ino: %llu.\n", __func__, pi, &pi->vfs_inode, pi->ino); kmem_cache_free(pohmelfs_inode_cache, pi); atomic_long_dec(&psb->total_inodes); } /* * ->alloc_inode() callback. Allocates inode and initilizes private data. */ static struct inode *pohmelfs_alloc_inode(struct super_block *sb) { struct pohmelfs_inode *pi; pi = kmem_cache_alloc(pohmelfs_inode_cache, GFP_NOIO); if (!pi) return NULL; pi->hash_root = RB_ROOT; mutex_init(&pi->offset_lock); INIT_LIST_HEAD(&pi->sync_create_list); INIT_LIST_HEAD(&pi->inode_entry); pi->lock_type = 0; pi->state = 0; pi->total_len = 0; pi->drop_count = 0; dprintk("%s: pi: %p, inode: %p.\n", __func__, pi, &pi->vfs_inode); atomic_long_inc(&POHMELFS_SB(sb)->total_inodes); return &pi->vfs_inode; } /* * We want fsync() to work on POHMELFS. */ static int pohmelfs_fsync(struct file *file, struct dentry *dentry, int datasync) { struct inode *inode = file->f_mapping->host; struct writeback_control wbc = { .sync_mode = WB_SYNC_ALL, .nr_to_write = 0, /* sys_fsync did this */ }; return sync_inode(inode, &wbc); } ssize_t pohmelfs_write(struct file *file, const char __user *buf, size_t len, loff_t *ppos) { struct address_space *mapping = file->f_mapping; struct inode *inode = mapping->host; struct pohmelfs_inode *pi = POHMELFS_I(inode); struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len }; struct kiocb kiocb; ssize_t ret; loff_t pos = *ppos; init_sync_kiocb(&kiocb, file); kiocb.ki_pos = pos; kiocb.ki_left = len; dprintk("%s: len: %zu, pos: %llu.\n", __func__, len, pos); mutex_lock(&inode->i_mutex); ret = pohmelfs_data_lock(pi, pos, len, POHMELFS_WRITE_LOCK); if (ret) goto err_out_unlock; ret = generic_file_aio_write_nolock(&kiocb, &iov, 1, pos); *ppos = kiocb.ki_pos; mutex_unlock(&inode->i_mutex); WARN_ON(ret < 0); if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { ssize_t err; err = sync_page_range(inode, mapping, pos, ret); if (err < 0) ret = err; WARN_ON(ret < 0); } return ret; err_out_unlock: mutex_unlock(&inode->i_mutex); return ret; } const static struct file_operations pohmelfs_file_ops = { .open = generic_file_open, .fsync = pohmelfs_fsync, .llseek = generic_file_llseek, .read = do_sync_read, .aio_read = generic_file_aio_read, .mmap = generic_file_mmap, .splice_read = generic_file_splice_read, .splice_write = generic_file_splice_write, .write = pohmelfs_write, .aio_write = generic_file_aio_write, }; const struct inode_operations pohmelfs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, }; int pohmelfs_setattr_raw(struct inode *inode, struct iattr *attr) { int err; err = inode_change_ok(inode, attr); if (err) { dprintk("%s: ino: %llu, inode changes are not allowed.\n", __func__, POHMELFS_I(inode)->ino); goto err_out_exit; } if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { err = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0; if (err) goto err_out_exit; } err = inode_setattr(inode, attr); if (err) { dprintk("%s: ino: %llu, failed to set the attributes.\n", __func__, POHMELFS_I(inode)->ino); goto err_out_exit; } dprintk("%s: ino: %llu, mode: %o -> %o, uid: %u -> %u, gid: %u -> %u, size: %llu -> %llu.\n", __func__, POHMELFS_I(inode)->ino, inode->i_mode, attr->ia_mode, inode->i_uid, attr->ia_uid, inode->i_gid, attr->ia_gid, inode->i_size, attr->ia_size); return 0; err_out_exit: return err; } int pohmelfs_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; struct pohmelfs_inode *pi = POHMELFS_I(inode); int err; err = pohmelfs_data_lock(pi, 0, ~0, POHMELFS_WRITE_LOCK); if (err) goto err_out_exit; err = security_inode_setattr(dentry, attr); if (err) goto err_out_exit; err = pohmelfs_setattr_raw(inode, attr); if (err) goto err_out_exit; return 0; err_out_exit: return err; } static int pohmelfs_send_xattr_req(struct pohmelfs_inode *pi, u64 id, u64 start, const char *name, const void *value, size_t attrsize, int command) { struct pohmelfs_sb *psb = POHMELFS_SB(pi->vfs_inode.i_sb); int err, path_len, namelen = strlen(name) + 1; /* 0-byte */ struct netfs_trans *t; struct netfs_cmd *cmd; void *data; dprintk("%s: id: %llu, start: %llu, name: '%s', attrsize: %zu, cmd: %d.\n", __func__, id, start, name, attrsize, command); path_len = pohmelfs_path_length(pi); if (path_len < 0) { err = path_len; goto err_out_exit; } t = netfs_trans_alloc(psb, namelen + path_len + attrsize, 0, 0); if (!t) { err = -ENOMEM; goto err_out_exit; } cmd = netfs_trans_current(t); data = cmd + 1; path_len = pohmelfs_construct_path_string(pi, data, path_len); if (path_len < 0) { err = path_len; goto err_out_put; } data += path_len; /* * 'name' is a NUL-terminated string already and * 'namelen' includes 0-byte. */ memcpy(data, name, namelen); data += namelen; memcpy(data, value, attrsize); cmd->cmd = command; cmd->id = id; cmd->start = start; cmd->size = attrsize + namelen + path_len; cmd->ext = path_len; cmd->csize = 0; cmd->cpad = 0; netfs_convert_cmd(cmd); netfs_trans_update(cmd, t, namelen + path_len + attrsize); return netfs_trans_finish(t, psb); err_out_put: t->result = err; netfs_trans_put(t); err_out_exit: return err; } static int pohmelfs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t attrsize, int flags) { struct inode *inode = dentry->d_inode; struct pohmelfs_inode *pi = POHMELFS_I(inode); struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); if (!(psb->state_flags & POHMELFS_FLAGS_XATTR)) return -EOPNOTSUPP; return pohmelfs_send_xattr_req(pi, flags, attrsize, name, value, attrsize, NETFS_XATTR_SET); } static ssize_t pohmelfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t attrsize) { struct inode *inode = dentry->d_inode; struct pohmelfs_inode *pi = POHMELFS_I(inode); struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); struct pohmelfs_mcache *m; int err; long timeout = psb->mcache_timeout; if (!(psb->state_flags & POHMELFS_FLAGS_XATTR)) return -EOPNOTSUPP; m = pohmelfs_mcache_alloc(psb, 0, attrsize, value); if (IS_ERR(m)) return PTR_ERR(m); dprintk("%s: ino: %llu, name: '%s', size: %zu.\n", __func__, pi->ino, name, attrsize); err = pohmelfs_send_xattr_req(pi, m->gen, attrsize, name, value, 0, NETFS_XATTR_GET); if (err) goto err_out_put; do { err = wait_for_completion_timeout(&m->complete, timeout); if (err) { err = m->err; break; } /* * This loop is a bit ugly, since it waits until reference counter * hits 1 and then put object here. Main goal is to prevent race with * network thread, when it can start processing given request, i.e. * increase its reference counter but yet not complete it, while * we will exit from ->getxattr() with timeout, and although request * will not be freed (its reference counter was increased by network * thread), data pointer provided by user may be released, so we will * overwrite already freed area in network thread. * * Now after timeout we remove request from the cache, so it can not be * found by network thread, and wait for its reference counter to hit 1, * i.e. if network thread already started to process this request, we wait * it to finish, and then free object locally. If reference counter is * already 1, i.e. request is not used by anyone else, we can free it without * problem. */ err = -ETIMEDOUT; timeout = HZ; pohmelfs_mcache_remove_locked(psb, m); } while (atomic_read(&m->refcnt) != 1); pohmelfs_mcache_put(psb, m); dprintk("%s: ino: %llu, err: %d.\n", __func__, pi->ino, err); return err; err_out_put: pohmelfs_mcache_put(psb, m); return err; } static int pohmelfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { struct inode *inode = dentry->d_inode; struct pohmelfs_inode *pi = POHMELFS_I(inode); int err; #if 0 err = pohmelfs_data_lock(pi, 0, ~0, POHMELFS_READ_LOCK); if (err) return err; #endif dprintk("%s: ino: %llu, mode: %o, uid: %u, gid: %u, size: %llu.\n", __func__, pi->ino, inode->i_mode, inode->i_uid, inode->i_gid, inode->i_size); generic_fillattr(inode, stat); return 0; } const struct inode_operations pohmelfs_file_inode_operations = { .setattr = pohmelfs_setattr, .getattr = pohmelfs_getattr, .setxattr = pohmelfs_setxattr, .getxattr = pohmelfs_getxattr, }; /* * Fill inode data: mode, size, operation callbacks and so on... */ void pohmelfs_fill_inode(struct inode *inode, struct netfs_inode_info *info) { inode->i_mode = info->mode; inode->i_nlink = info->nlink; inode->i_uid = info->uid; inode->i_gid = info->gid; inode->i_blocks = info->blocks; inode->i_rdev = info->rdev; inode->i_size = info->size; inode->i_version = info->version; inode->i_blkbits = ffs(info->blocksize); dprintk("%s: inode: %p, num: %lu/%llu inode is regular: %d, dir: %d, link: %d, mode: %o, size: %llu.\n", __func__, inode, inode->i_ino, info->ino, S_ISREG(inode->i_mode), S_ISDIR(inode->i_mode), S_ISLNK(inode->i_mode), inode->i_mode, inode->i_size); inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; /* * i_mapping is a pointer to i_data during inode initialization. */ inode->i_data.a_ops = &pohmelfs_aops; if (S_ISREG(inode->i_mode)) { inode->i_fop = &pohmelfs_file_ops; inode->i_op = &pohmelfs_file_inode_operations; } else if (S_ISDIR(inode->i_mode)) { inode->i_fop = &pohmelfs_dir_fops; inode->i_op = &pohmelfs_dir_inode_ops; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &pohmelfs_symlink_inode_operations; inode->i_fop = &pohmelfs_file_ops; } else { inode->i_fop = &generic_ro_fops; } } static void pohmelfs_drop_inode(struct inode *inode) { struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); struct pohmelfs_inode *pi = POHMELFS_I(inode); spin_lock(&psb->ino_lock); list_del_init(&pi->inode_entry); spin_unlock(&psb->ino_lock); generic_drop_inode(inode); } static struct pohmelfs_inode *pohmelfs_get_inode_from_list(struct pohmelfs_sb *psb, struct list_head *head, unsigned int *count) { struct pohmelfs_inode *pi = NULL; spin_lock(&psb->ino_lock); if (!list_empty(head)) { pi = list_entry(head->next, struct pohmelfs_inode, inode_entry); list_del_init(&pi->inode_entry); *count = pi->drop_count; pi->drop_count = 0; } spin_unlock(&psb->ino_lock); return pi; } static void pohmelfs_flush_transactions(struct pohmelfs_sb *psb) { struct pohmelfs_config *c; mutex_lock(&psb->state_lock); list_for_each_entry(c, &psb->state_list, config_entry) { pohmelfs_state_flush_transactions(&c->state); } mutex_unlock(&psb->state_lock); } /* * ->put_super() callback. Invoked before superblock is destroyed, * so it has to clean all private data. */ static void pohmelfs_put_super(struct super_block *sb) { struct pohmelfs_sb *psb = POHMELFS_SB(sb); struct pohmelfs_inode *pi; unsigned int count; unsigned int in_drop_list = 0; struct inode *inode, *tmp; dprintk("%s.\n", __func__); /* * Kill pending transactions, which could affect inodes in-flight. */ pohmelfs_flush_transactions(psb); while ((pi = pohmelfs_get_inode_from_list(psb, &psb->drop_list, &count))) { inode = &pi->vfs_inode; dprintk("%s: ino: %llu, pi: %p, inode: %p, count: %u.\n", __func__, pi->ino, pi, inode, count); if (atomic_read(&inode->i_count) != count) { printk("%s: ino: %llu, pi: %p, inode: %p, count: %u, i_count: %d.\n", __func__, pi->ino, pi, inode, count, atomic_read(&inode->i_count)); count = atomic_read(&inode->i_count); in_drop_list++; } while (count--) iput(&pi->vfs_inode); } list_for_each_entry_safe(inode, tmp, &sb->s_inodes, i_sb_list) { pi = POHMELFS_I(inode); dprintk("%s: ino: %llu, pi: %p, inode: %p, i_count: %u.\n", __func__, pi->ino, pi, inode, atomic_read(&inode->i_count)); /* * These are special inodes, they were created during * directory reading or lookup, and were not bound to dentry, * so they live here with reference counter being 1 and prevent * umount from succeed since it believes that they are busy. */ count = atomic_read(&inode->i_count); if (count) { list_del_init(&inode->i_sb_list); while (count--) iput(&pi->vfs_inode); } } psb->trans_scan_timeout = psb->drop_scan_timeout = 0; cancel_rearming_delayed_work(&psb->dwork); cancel_rearming_delayed_work(&psb->drop_dwork); flush_scheduled_work(); dprintk("%s: stopped workqueues.\n", __func__); pohmelfs_crypto_exit(psb); pohmelfs_state_exit(psb); kfree(psb); sb->s_fs_info = NULL; pohmelfs_ftrans_exit(); } static int pohmelfs_remount(struct super_block *sb, int *flags, char *data) { *flags |= MS_RDONLY; return 0; } static int pohmelfs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct pohmelfs_sb *psb = POHMELFS_SB(sb); /* * There are no filesystem size limits yet. */ memset(buf, 0, sizeof(struct kstatfs)); buf->f_type = POHMELFS_MAGIC_NUM; /* 'POH.' */ buf->f_bsize = sb->s_blocksize; buf->f_files = psb->ino; buf->f_namelen = 255; buf->f_files = atomic_long_read(&psb->total_inodes); buf->f_bfree = buf->f_bavail = psb->avail_size >> PAGE_SHIFT; buf->f_blocks = psb->total_size >> PAGE_SHIFT; dprintk("%s: total: %llu, avail: %llu, inodes: %llu, bsize: %lu.\n", __func__, psb->total_size, psb->avail_size, buf->f_files, sb->s_blocksize); return 0; } static int pohmelfs_show_options(struct seq_file *seq, struct vfsmount *vfs) { struct pohmelfs_sb *psb = POHMELFS_SB(vfs->mnt_sb); seq_printf(seq, ",idx=%u", psb->idx); seq_printf(seq, ",trans_scan_timeout=%u", jiffies_to_msecs(psb->trans_scan_timeout)); seq_printf(seq, ",drop_scan_timeout=%u", jiffies_to_msecs(psb->drop_scan_timeout)); seq_printf(seq, ",wait_on_page_timeout=%u", jiffies_to_msecs(psb->wait_on_page_timeout)); seq_printf(seq, ",trans_retries=%u", psb->trans_retries); seq_printf(seq, ",crypto_thread_num=%u", psb->crypto_thread_num); seq_printf(seq, ",trans_max_pages=%u", psb->trans_max_pages); seq_printf(seq, ",mcache_timeout=%u", jiffies_to_msecs(psb->mcache_timeout)); if (psb->crypto_fail_unsupported) seq_printf(seq, ",crypto_fail_unsupported"); return 0; } static const struct super_operations pohmelfs_sb_ops = { .alloc_inode = pohmelfs_alloc_inode, .destroy_inode = pohmelfs_destroy_inode, .drop_inode = pohmelfs_drop_inode, .write_inode = pohmelfs_write_inode, .put_super = pohmelfs_put_super, .remount_fs = pohmelfs_remount, .statfs = pohmelfs_statfs, .show_options = pohmelfs_show_options, }; enum { pohmelfs_opt_idx, pohmelfs_opt_trans_scan_timeout, pohmelfs_opt_drop_scan_timeout, pohmelfs_opt_wait_on_page_timeout, pohmelfs_opt_trans_retries, pohmelfs_opt_crypto_thread_num, pohmelfs_opt_trans_max_pages, pohmelfs_opt_crypto_fail_unsupported, pohmelfs_opt_mcache_timeout, }; static struct match_token pohmelfs_tokens[] = { {pohmelfs_opt_idx, "idx=%u"}, {pohmelfs_opt_trans_scan_timeout, "trans_scan_timeout=%u"}, {pohmelfs_opt_drop_scan_timeout, "drop_scan_timeout=%u"}, {pohmelfs_opt_wait_on_page_timeout, "wait_on_page_timeout=%u"}, {pohmelfs_opt_trans_retries, "trans_retries=%u"}, {pohmelfs_opt_crypto_thread_num, "crypto_thread_num=%u"}, {pohmelfs_opt_trans_max_pages, "trans_max_pages=%u"}, {pohmelfs_opt_crypto_fail_unsupported, "crypto_fail_unsupported"}, {pohmelfs_opt_mcache_timeout, "mcache_timeout=%u"}, }; static int pohmelfs_parse_options(char *options, struct pohmelfs_sb *psb) { char *p; substring_t args[MAX_OPT_ARGS]; int option, err; if (!options) return 0; while ((p = strsep(&options, ",")) != NULL) { int token; if (!*p) continue; token = match_token(p, pohmelfs_tokens, args); err = match_int(&args[0], &option); if (err) return err; switch (token) { case pohmelfs_opt_idx: psb->idx = option; break; case pohmelfs_opt_trans_scan_timeout: psb->trans_scan_timeout = msecs_to_jiffies(option); break; case pohmelfs_opt_drop_scan_timeout: psb->drop_scan_timeout = msecs_to_jiffies(option); break; case pohmelfs_opt_wait_on_page_timeout: psb->wait_on_page_timeout = msecs_to_jiffies(option); break; case pohmelfs_opt_mcache_timeout: psb->mcache_timeout = msecs_to_jiffies(option); break; case pohmelfs_opt_trans_retries: psb->trans_retries = option; break; case pohmelfs_opt_crypto_thread_num: psb->crypto_thread_num = option; break; case pohmelfs_opt_trans_max_pages: psb->trans_max_pages = option; break; case pohmelfs_opt_crypto_fail_unsupported: psb->crypto_fail_unsupported = 1; break; default: return -EINVAL; } } return 0; } static void pohmelfs_flush_inode(struct pohmelfs_inode *pi, unsigned int count) { struct inode *inode = &pi->vfs_inode; dprintk("%s: %p: ino: %llu, owned: %d.\n", __func__, inode, pi->ino, test_bit(NETFS_INODE_OWNED, &pi->state)); mutex_lock(&inode->i_mutex); if (test_and_clear_bit(NETFS_INODE_OWNED, &pi->state)) { filemap_fdatawrite(inode->i_mapping); inode->i_sb->s_op->write_inode(inode, 0); } truncate_inode_pages(inode->i_mapping, 0); pohmelfs_data_unlock(pi, 0, ~0, POHMELFS_WRITE_LOCK); mutex_unlock(&inode->i_mutex); } static void pohmelfs_put_inode_count(struct pohmelfs_inode *pi, unsigned int count) { dprintk("%s: ino: %llu, pi: %p, inode: %p, count: %u.\n", __func__, pi->ino, pi, &pi->vfs_inode, count); if (test_and_clear_bit(NETFS_INODE_NEED_FLUSH, &pi->state)) pohmelfs_flush_inode(pi, count); while (count--) iput(&pi->vfs_inode); } static void pohmelfs_drop_scan(struct work_struct *work) { struct pohmelfs_sb *psb = container_of(work, struct pohmelfs_sb, drop_dwork.work); struct pohmelfs_inode *pi; unsigned int count = 0; while ((pi = pohmelfs_get_inode_from_list(psb, &psb->drop_list, &count))) { pohmelfs_put_inode_count(pi, count); } pohmelfs_check_states(psb); if (psb->drop_scan_timeout) schedule_delayed_work(&psb->drop_dwork, psb->drop_scan_timeout); } /* * Run through all transactions starting from the oldest, * drop transaction from current state and try to send it * to all remote nodes, which are currently installed. */ static void pohmelfs_trans_scan_state(struct netfs_state *st) { struct rb_node *rb_node; struct netfs_trans_dst *dst; struct pohmelfs_sb *psb = st->psb; unsigned int timeout = psb->trans_scan_timeout; struct netfs_trans *t; int err; mutex_lock(&st->trans_lock); for (rb_node = rb_first(&st->trans_root); rb_node; ) { dst = rb_entry(rb_node, struct netfs_trans_dst, state_entry); t = dst->trans; if (timeout && time_after(dst->send_time + timeout, jiffies) && dst->retries == 0) break; dprintk("%s: t: %p, gen: %u, st: %p, retries: %u, max: %u.\n", __func__, t, t->gen, st, dst->retries, psb->trans_retries); netfs_trans_get(t); rb_node = rb_next(rb_node); err = -ETIMEDOUT; if (timeout && (++dst->retries < psb->trans_retries)) { err = netfs_trans_resend(t, psb); } if (err || (t->flags & NETFS_TRANS_SINGLE_DST)) { if (netfs_trans_remove_nolock(dst, st)) netfs_trans_drop_dst_nostate(dst); } t->result = err; netfs_trans_put(t); } mutex_unlock(&st->trans_lock); } /* * Walk through all installed network states and resend all * transactions, which are old enough. */ static void pohmelfs_trans_scan(struct work_struct *work) { struct pohmelfs_sb *psb = container_of(work, struct pohmelfs_sb, dwork.work); struct netfs_state *st; struct pohmelfs_config *c; mutex_lock(&psb->state_lock); list_for_each_entry(c, &psb->state_list, config_entry) { st = &c->state; pohmelfs_trans_scan_state(st); } mutex_unlock(&psb->state_lock); /* * If no timeout specified then system is in the middle of umount process, * so no need to reschedule scanning process again. */ if (psb->trans_scan_timeout) schedule_delayed_work(&psb->dwork, psb->trans_scan_timeout); } int pohmelfs_meta_command_data(struct pohmelfs_inode *pi, u64 id, unsigned int cmd_op, char *addon, unsigned int flags, netfs_trans_complete_t complete, void *priv, u64 start) { struct inode *inode = &pi->vfs_inode; struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); int err = 0, sz; struct netfs_trans *t; int path_len, addon_len = 0; void *data; struct netfs_inode_info *info; struct netfs_cmd *cmd; dprintk("%s: ino: %llu, cmd: %u, addon: %p.\n", __func__, pi->ino, cmd_op, addon); path_len = pohmelfs_path_length(pi); if (path_len < 0) { err = path_len; goto err_out_exit; } if (addon) addon_len = strlen(addon) + 1; /* 0-byte */ sz = addon_len; if (cmd_op == NETFS_INODE_INFO) sz += sizeof(struct netfs_inode_info); t = netfs_trans_alloc(psb, sz + path_len, flags, 0); if (!t) { err = -ENOMEM; goto err_out_exit; } t->complete = complete; t->private = priv; cmd = netfs_trans_current(t); data = (void *)(cmd + 1); if (cmd_op == NETFS_INODE_INFO) { info = (struct netfs_inode_info *)(cmd + 1); data = (void *)(info + 1); /* * We are under i_mutex, can read and change whatever we want... */ info->mode = inode->i_mode; info->nlink = inode->i_nlink; info->uid = inode->i_uid; info->gid = inode->i_gid; info->blocks = inode->i_blocks; info->rdev = inode->i_rdev; info->size = inode->i_size; info->version = inode->i_version; netfs_convert_inode_info(info); } path_len = pohmelfs_construct_path_string(pi, data, path_len); if (path_len < 0) goto err_out_free; dprintk("%s: path_len: %d.\n", __func__, path_len); if (addon) { path_len--; /* Do not place null-byte before the addon */ path_len += sprintf(data + path_len, "/%s", addon) + 1; /* 0 - byte */ } sz += path_len; cmd->cmd = cmd_op; cmd->ext = path_len; cmd->size = sz; cmd->id = id; cmd->start = start; netfs_convert_cmd(cmd); netfs_trans_update(cmd, t, sz); /* * Note, that it is possible to leak error here: transaction callback will not * be invoked for allocation path failure. */ return netfs_trans_finish(t, psb); err_out_free: netfs_trans_free(t); err_out_exit: if (complete) complete(NULL, 0, priv, err); return err; } int pohmelfs_meta_command(struct pohmelfs_inode *pi, unsigned int cmd_op, unsigned int flags, netfs_trans_complete_t complete, void *priv, u64 start) { return pohmelfs_meta_command_data(pi, pi->ino, cmd_op, NULL, flags, complete, priv, start); } /* * Send request and wait for POHMELFS root capabilities response, * which will update server's informaion about size of the export, * permissions, number of objects, available size and so on. */ static int pohmelfs_root_handshake(struct pohmelfs_sb *psb) { struct netfs_trans *t; struct netfs_cmd *cmd; int err = -ENOMEM; t = netfs_trans_alloc(psb, 0, 0, 0); if (!t) goto err_out_exit; cmd = netfs_trans_current(t); cmd->cmd = NETFS_CAPABILITIES; cmd->id = POHMELFS_ROOT_CAPABILITIES; cmd->size = 0; cmd->start = 0; cmd->ext = 0; cmd->csize = 0; netfs_convert_cmd(cmd); netfs_trans_update(cmd, t, 0); err = netfs_trans_finish(t, psb); if (err) goto err_out_exit; psb->flags = ~0; err = wait_event_interruptible_timeout(psb->wait, (psb->flags != ~0), psb->wait_on_page_timeout); if (!err) { err = -ETIMEDOUT; } else { err = -psb->flags; } if (err) goto err_out_exit; return 0; err_out_exit: return err; } /* * Allocate private superblock and create root dir. */ static int pohmelfs_fill_super(struct super_block *sb, void *data, int silent) { struct pohmelfs_sb *psb; int err = -ENOMEM; struct inode *root; struct pohmelfs_inode *npi; struct qstr str; pohmelfs_ftrans_init(); psb = kzalloc(sizeof(struct pohmelfs_sb), GFP_KERNEL); if (!psb) goto err_out_exit; sb->s_fs_info = psb; sb->s_op = &pohmelfs_sb_ops; sb->s_magic = POHMELFS_MAGIC_NUM; sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = PAGE_SIZE; psb->sb = sb; psb->ino = 2; psb->idx = 0; psb->active_state = NULL; psb->trans_retries = 5; psb->trans_data_size = PAGE_SIZE; psb->drop_scan_timeout = msecs_to_jiffies(1000); psb->trans_scan_timeout = msecs_to_jiffies(5000); psb->wait_on_page_timeout = msecs_to_jiffies(5000); init_waitqueue_head(&psb->wait); spin_lock_init(&psb->ino_lock); INIT_LIST_HEAD(&psb->drop_list); mutex_init(&psb->mcache_lock); psb->mcache_root = RB_ROOT; psb->mcache_timeout = msecs_to_jiffies(5000); atomic_long_set(&psb->mcache_gen, 0); psb->trans_max_pages = 100; psb->crypto_align_size = 16; psb->crypto_attached_size = 0; psb->hash_strlen = 0; psb->cipher_strlen = 0; psb->perform_crypto = 0; psb->crypto_thread_num = 2; psb->crypto_fail_unsupported = 0; mutex_init(&psb->crypto_thread_lock); INIT_LIST_HEAD(&psb->crypto_ready_list); INIT_LIST_HEAD(&psb->crypto_active_list); atomic_set(&psb->trans_gen, 1); atomic_set(&psb->total_inodes, 0); mutex_init(&psb->state_lock); INIT_LIST_HEAD(&psb->state_list); err = pohmelfs_parse_options((char *) data, psb); if (err) goto err_out_free_sb; err = pohmelfs_copy_crypto(psb); if (err) goto err_out_free_sb; err = pohmelfs_state_init(psb); if (err) goto err_out_free_strings; err = pohmelfs_crypto_init(psb); if (err) goto err_out_state_exit; err = pohmelfs_root_handshake(psb); if (err) goto err_out_crypto_exit; str.name = "/"; str.hash = jhash("/", 1, 0); str.len = 1; npi = pohmelfs_create_entry_local(psb, NULL, &str, 0, 0755|S_IFDIR); if (IS_ERR(npi)) { err = PTR_ERR(npi); goto err_out_crypto_exit;