litmus-rt.git - The LITMUS^RT kernel.

Branch	Commit message	Author	Age
archive/unc-master-3.0	P-FP: fix BUG_ON releated to priority inheritance	Bjoern Brandenburg	13 years
archived-2013.1	uncachedev: mmap memory that is not cached by CPUs	Glenn Elliott	12 years
archived-private-master	Merge branch 'wip-2.6.34' into old-private-master	Andrea Bastoni	15 years
archived-semi-part	Merge branch 'wip-semi-part' of ssh://cvs/cvs/proj/litmus/repo/litmus2010 int...	Andrea Bastoni	15 years
demo	Further refinements	Jonathan Herman	14 years
ecrts-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
ecrts14-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
gpusync-rtss12	Final GPUSync implementation.	Glenn Elliott	12 years
gpusync/staging	Rename IKGLP R2DGLP.	Glenn Elliott	12 years
linux-tip	Merge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/p...	Linus Torvalds	15 years
litmus2008-patch-series	add i386 feather-trace implementation	Bjoern B. Brandenburg	16 years
master	PSN-EDF: use inferred_sporadic_job_release_at	Bjoern Brandenburg	9 years
pgm	make it compile	Glenn Elliott	12 years
prop/litmus-signals	Infrastructure for Litmus signals.	Glenn Elliott	13 years
prop/robust-tie-break	Fixed bug in edf_higher_prio().	Glenn Elliott	13 years
staging	Fix tracepoint compilation error	Felipe Cerqueira	13 years
test	9/23/2016	Namhoon Kim	9 years
tracing-devel	Test kernel tracing events capabilities	Andrea Bastoni	16 years
v2.6.34-with-arm-patches	smsc911x: Add spinlocks around registers access	Catalin Marinas	15 years
v2015.1	Add ARM syscall def for get_current_budget	Bjoern Brandenburg	10 years
wip-2011.2-bbb	Litmus core: simplify np-section protocol	Bjoern B. Brandenburg	14 years
wip-2011.2-bbb-trace	Refactor sched_trace_log_message() -> debug_trace_log_message()	Andrea Bastoni	14 years
wip-2012.3-gpu	SOBLIV draining support for C-EDF.	Glenn Elliott	12 years
wip-2012.3-gpu-preport	pick up last C-RM file	Glenn Elliott	12 years
wip-2012.3-gpu-rtss13	Fix critical bug in GPU tracker.	Glenn Elliott	12 years
wip-2012.3-gpu-sobliv-budget-w-kshark	Proper sobliv draining and many bug fixes.	Glenn Elliott	12 years
wip-aedzl-final	Make it easier to compile AEDZL interfaces in liblitmus.	Glenn Elliott	15 years
wip-aedzl-revised	Add sched_trace data for Apative EDZL	Glenn Elliott	15 years
wip-arbit-deadline	Fix compilation bug.	Glenn Elliott	13 years
wip-aux-tasks	Description of refined aux task inheritance.	Glenn Elliott	13 years
wip-bbb	GSN-EDF & Core: improve debug TRACE'ing for NP sections	Bjoern B. Brandenburg	14 years
wip-bbb-prio-don	use correct timestamp	Bjoern B. Brandenburg	14 years
wip-better-break	Implement hash-based EDF tie-breaking.	Glenn Elliott	13 years
wip-binary-heap	Make C-EDF work with simplified binheap_delete	Glenn Elliott	13 years
wip-budget	Added support for choices in budget policy enforcement.	Glenn Elliott	15 years
wip-color	Summarize schedulability with final record	Jonathan Herman	13 years
wip-color-jlh	sched_color: Fixed two bugs causing crashing on experiment restart and a rare...	Jonathan Herman	13 years
wip-d10-hz1000	Enable HZ=1000 on District 10	Bjoern B. Brandenburg	15 years
wip-default-clustering	Feature: Make default C-EDF clustering compile-time configurable.	Glenn Elliott	15 years
wip-dissipation-jerickso	Update from 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-dissipation2-jerickso	Update 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-ecrts14-pgm	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
wip-edf-hsb	last tested version	Jonathan Herman	14 years
wip-edf-os	Lookup table EDF-os	Jeremy Erickson	12 years
wip-edf-tie-break	Merge branch 'wip-edf-tie-break' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus...	Glenn Elliott	13 years
wip-edzl-critique	Use hr_timer's active checks instead of having own flag.	Glenn Elliott	15 years
wip-edzl-final	Implementation of the EDZL scheduler.	Glenn Elliott	15 years
wip-edzl-revised	Clean up comments.	Glenn Elliott	15 years
wip-events	Added support for tracing arbitrary actions.	Jonathan Herman	15 years
wip-extra-debug	DBG: add additional tracing	Bjoern B. Brandenburg	15 years
wip-fix-switch-jerickso	Attempt to fix race condition with plugin switching	Jeremy Erickson	15 years
wip-fix3	sched: show length of runqueue clock deactivation in /proc/sched_debug	Bjoern B. Brandenburg	15 years
wip-fmlp-dequeue	Improve FMLP queue management.	Glenn Elliott	14 years
wip-ft-irq-flag	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-gpu-cleanup	Enable sched_trace log injection from userspace	Glenn Elliott	13 years
wip-gpu-interrupts	Remove option for threading of all softirqs.	Glenn Elliott	14 years
wip-gpu-rtas12	Generalized GPU cost predictors + EWMA. (untested)	Glenn Elliott	13 years
wip-gpu-rtss12	Final GPUSync implementation.	Glenn Elliott	13 years
wip-gpu-rtss12-srp	experimental changes to support GPUs under SRP	Glenn Elliott	13 years
wip-gpusync-merge	Cleanup priority tracking for budget enforcement.	Glenn Elliott	11 years
wip-ikglp	Move RSM and IKGLP imp. to own .c files	Glenn Elliott	13 years
wip-k-fmlp	Merge branch 'mpi-master' into wip-k-fmlp	Glenn Elliott	14 years
wip-kernel-coloring	Added recolor syscall	Namhoon Kim	7 years
wip-kernthreads	Kludge work-queue processing into klitirqd.	Glenn Elliott	15 years
wip-klmirqd-to-aux	Allow klmirqd threads to be given names.	Glenn Elliott	13 years
wip-kshark	Merge branch 'mpi-staging' into wip-kshark	Jonathan Herman	13 years
wip-litmus-3.2	Merge commit 'v3.2' into litmus-staging	Andrea Bastoni	13 years
wip-litmus2011.2	Cleanup: Coding conformance for affinity stuff.	Glenn Elliott	14 years
wip-litmus3.0-2011.2	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-master-2.6.33-rt	Avoid deadlock when switching task policy to BACKGROUND (ugly)	Andrea Bastoni	15 years
wip-mc	Removed ARM-specific hacks which disabled less common mixed-criticality featu...	Jonathan Herman	12 years
wip-mc-bipasa	MC-EDF added	bipasa chattopadhyay	13 years
wip-mc-jerickso	Split C/D queues	Jeremy Erickson	15 years
wip-mc2-cache-slack	Manually patched mc^2 related code	Ming Yang	10 years
wip-mcrit-mac	cosmetic	Mac Mollison	15 years
wip-merge-3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-merge-v3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-migration-affinity	NULL affinity dereference in C-EDF.	Glenn Elliott	14 years
wip-mmap-uncache	share branch with others	Glenn Elliott	13 years
wip-modechange	RTSS 2017 submission	Namhoon Kim	8 years
wip-nested-locking	Appears to be working.	Bryan Ward	12 years
wip-omlp-gedf	First implementation of G-OMLP.	Glenn Elliott	15 years
wip-pai	Some cleanup of PAI	Glenn Elliott	14 years
wip-percore-lib	9/21/2016	Namhoon Kim	9 years
wip-performance	CONFIG_DONT_PREEMPT_ON_TIE: Don't preeempt a scheduled task on priority tie.	Glenn Elliott	14 years
wip-pgm	Add PGM support to C-FL	Glenn Elliott	12 years
wip-pgm-split	First draft of C-FL-split	Namhoon Kim	12 years
wip-pm-ovd	Add preemption-and-migration overhead tracing support	Andrea Bastoni	15 years
wip-prio-inh	P-EDF updated to use the generic pi framework.	Glenn Elliott	15 years
wip-prioq-dgl	BUG FIX: Support DGLs with PRIOQ_MUTEX	Glenn Elliott	13 years
wip-refactored-gedf	Generalizd architecture for GEDF-style scheduelrs to reduce code redundancy.	Glenn Elliott	15 years
wip-release-master-fix	bugfix: release master CPU must signal task was picked	Bjoern B. Brandenburg	14 years
wip-robust-tie-break	EDF priority tie-breaks.	Glenn Elliott	13 years
wip-rt-kshark	Move task time accounting into the complete_job method.	Jonathan Herman	13 years
wip-rtas12-pgm	Scheduling of PGM jobs.	Glenn Elliott	13 years
wip-semi-part	Fix compile error with newer GCC	Jeremy Erickson	12 years
wip-semi-part-edfos-jerickso	Use initial CPU set by client	Jeremy Erickson	12 years
wip-shared-lib	TODO: Fix condition checks in replicate_page_move_mapping()	Namhoon Kim	9 years
wip-shared-lib2	RTAS 2017 Submission ver.	Namhoon Kim	9 years
wip-shared-mem	Initial commit for shared library	Namhoon Kim	9 years
wip-splitting-jerickso	Fix release behavior	Jeremy Erickson	13 years
wip-splitting-omlp-jerickso	Bjoern's Dissertation Code with Priority Donation	Jeremy Erickson	13 years
wip-stage-binheap	An efficient binary heap implementation.	Glenn Elliott	13 years
wip-sun-port	Dynamic memory allocation and clean exit for FeatherTrace	Christopher Kenna	15 years
wip-timer-trace	bugfix: C-EDF, clear scheduled field of the correct CPU upon task_exit	Andrea Bastoni	15 years
wip-tracepoints	Add kernel-style events for sched_trace_XXX() functions	Andrea Bastoni	14 years

Tag	Download	Author	Age
2015.1	commit 8e51b37822...	Bjoern Brandenburg	10 years
2013.1	commit bcaacec1ca...	Glenn Elliott	12 years
2012.3	commit c158b5fbe4...	Jonathan Herman	13 years
2012.2	commit b53c479a0f...	Glenn Elliott	13 years
2012.1	commit 83b11ea1c6...	Bjoern B. Brandenburg	14 years
rtas12-mc-beta-exp	commit 8e236ee20f...	Christopher Kenna	14 years
2011.1	commit d11808b5c6...	Christopher Kenna	15 years
v2.6.37-rc4	commit e8a7e48bb2...	Linus Torvalds	15 years
v2.6.37-rc3	commit 3561d43fd2...	Linus Torvalds	15 years
v2.6.37-rc2	commit e53beacd23...	Linus Torvalds	15 years
v2.6.37-rc1	commit c8ddb2713c...	Linus Torvalds	15 years
v2.6.36	commit f6f94e2ab1...	Linus Torvalds	15 years
2010.2	commit 5c5456402d...	Bjoern B. Brandenburg	15 years
v2.6.36-rc8	commit cd07202cc8...	Linus Torvalds	15 years
v2.6.36-rc7	commit cb655d0f3d...	Linus Torvalds	15 years
v2.6.36-rc6	commit 899611ee7d...	Linus Torvalds	15 years
v2.6.36-rc5	commit b30a3f6257...	Linus Torvalds	15 years
v2.6.36-rc4	commit 49553c2ef8...	Linus Torvalds	15 years
v2.6.36-rc3	commit 2bfc96a127...	Linus Torvalds	15 years
v2.6.36-rc2	commit 76be97c1fc...	Linus Torvalds	15 years
v2.6.36-rc1	commit da5cabf80e...	Linus Torvalds	15 years
v2.6.35	commit 9fe6206f40...	Linus Torvalds	15 years
v2.6.35-rc6	commit b37fa16e78...	Linus Torvalds	15 years
v2.6.35-rc5	commit 1c5474a65b...	Linus Torvalds	15 years
v2.6.35-rc4	commit 815c4163b6...	Linus Torvalds	15 years
v2.6.35-rc3	commit 7e27d6e778...	Linus Torvalds	15 years
v2.6.35-rc2	commit e44a21b726...	Linus Torvalds	15 years
v2.6.35-rc1	commit 67a3e12b05...	Linus Torvalds	15 years
2010.1	commit 7c1ff4c544...	Andrea Bastoni	15 years
v2.6.34	commit e40152ee1e...	Linus Torvalds	15 years
v2.6.33.4	commit 4640b4e7d9...	Greg Kroah-Hartman	15 years
v2.6.34-rc7	commit b57f95a382...	Linus Torvalds	15 years
v2.6.34-rc6	commit 66f41d4c5c...	Linus Torvalds	15 years
v2.6.33.3	commit 3e7ad8ed97...	Greg Kroah-Hartman	15 years
v2.6.34-rc5	commit 01bf0b6457...	Linus Torvalds	15 years
v2.6.34-rc4	commit 0d0fb0f9c5...	Linus Torvalds	15 years
v2.6.33.2	commit 19f00f070c...	Greg Kroah-Hartman	15 years
v2.6.34-rc3	commit 2eaa9cfdf3...	Linus Torvalds	15 years
v2.6.34-rc2	commit 220bf991b0...	Linus Torvalds	15 years
v2.6.33.1	commit dbdafe5ccf...	Greg Kroah-Hartman	16 years
v2.6.34-rc1	commit 57d54889cd...	Linus Torvalds	16 years
v2.6.33	commit 60b341b778...	Linus Torvalds	16 years
v2.6.33-rc8	commit 724e6d3fe8...	Linus Torvalds	16 years
v2.6.33-rc7	commit 29275254ca...	Linus Torvalds	16 years
v2.6.33-rc6	commit abe94c756c...	Linus Torvalds	16 years
v2.6.33-rc5	commit 92dcffb916...	Linus Torvalds	16 years
v2.6.33-rc4	commit 7284ce6c9f...	Linus Torvalds	16 years
v2.6.33-rc3	commit 74d2e4f8d7...	Linus Torvalds	16 years
v2.6.33-rc2	commit 6b7b284958...	Linus Torvalds	16 years
v2.6.33-rc1	commit 55639353a0...	Linus Torvalds	16 years
v2.6.32	commit 22763c5cf3...	Linus Torvalds	16 years
v2.6.32-rc8	commit 648f4e3e50...	Linus Torvalds	16 years
v2.6.32-rc7	commit 156171c71a...	Linus Torvalds	16 years
v2.6.32-rc6	commit b419148e56...	Linus Torvalds	16 years
v2.6.32-rc5	commit 012abeea66...	Linus Torvalds	16 years
v2.6.32-rc4	commit 161291396e...	Linus Torvalds	16 years
v2.6.32-rc3	commit 374576a8b6...	Linus Torvalds	16 years
v2.6.32-rc1	commit 17d857be64...	Linus Torvalds	16 years
v2.6.32-rc2	commit 17d857be64...	Linus Torvalds	16 years
v2.6.31	commit 74fca6a428...	Linus Torvalds	16 years
v2.6.31-rc9	commit e07cccf404...	Linus Torvalds	16 years
v2.6.31-rc8	commit 326ba5010a...	Linus Torvalds	16 years
v2.6.31-rc7	commit 422bef879e...	Linus Torvalds	16 years
v2.6.31-rc6	commit 64f1607ffb...	Linus Torvalds	16 years
v2.6.31-rc5	commit ed680c4ad4...	Linus Torvalds	16 years
v2.6.31-rc4	commit 4be3bd7849...	Linus Torvalds	16 years
v2.6.31-rc3	commit 6847e154e3...	Linus Torvalds	16 years
v2.6.31-rc2	commit 8e4a718ff3...	Linus Torvalds	16 years
v2.6.31-rc1	commit 28d0325ce6...	Linus Torvalds	16 years
v2.6.30	commit 07a2039b8e...	Linus Torvalds	16 years
v2.6.30-rc8	commit 9fa7eb283c...	Linus Torvalds	16 years
v2.6.30-rc7	commit 59a3759d0f...	Linus Torvalds	16 years
v2.6.30-rc6	commit 1406de8e11...	Linus Torvalds	16 years
v2.6.30-rc5	commit 091bf7624d...	Linus Torvalds	16 years
v2.6.30-rc4	commit 091438dd56...	Linus Torvalds	16 years
v2.6.30-rc3	commit 0910697403...	Linus Torvalds	16 years
v2.6.30-rc2	commit 0882e8dd3a...	Linus Torvalds	16 years
v2.6.30-rc1	commit 577c9c456f...	Linus Torvalds	16 years
v2.6.29	commit 8e0ee43bc2...	Linus Torvalds	16 years
v2.6.29-rc8	commit 041b62374c...	Linus Torvalds	17 years
v2.6.29-rc7	commit fec6c6fec3...	Linus Torvalds	17 years
v2.6.29-rc6	commit 20f4d6c3a2...	Linus Torvalds	17 years
v2.6.29-rc5	commit d2f8d7ee1a...	Linus Torvalds	17 years
v2.6.29-rc4	commit 8e4921515c...	Linus Torvalds	17 years
v2.6.29-rc3	commit 18e352e4a7...	Linus Torvalds	17 years
v2.6.29-rc2	commit 1de9e8e70f...	Linus Torvalds	17 years
v2.6.29-rc1	commit c59765042f...	Linus Torvalds	17 years
v2.6.28	commit 4a6908a3a0...	Linus Torvalds	17 years
v2.6.28-rc9	commit 929096fe9f...	Linus Torvalds	17 years
v2.6.28-rc8	commit 8b1fae4e42...	Linus Torvalds	17 years
v2.6.28-rc7	commit 061e41fdb5...	Linus Torvalds	17 years
v2.6.28-rc6	commit 13d428afc0...	Linus Torvalds	17 years
v2.6.28-rc5	commit 9bf1a2445f...	Linus Torvalds	17 years
v2.6.28-rc4	commit f7160c7573...	Linus Torvalds	17 years
v2.6.28-rc3	commit 45beca08dd...	Linus Torvalds	17 years
v2.6.28-rc2	commit 0173a3265b...	Linus Torvalds	17 years
v2.6.28-rc1	commit 57f8f7b60d...	Linus Torvalds	17 years
v2.6.27	commit 3fa8749e58...	Linus Torvalds	17 years
v2.6.27-rc9	commit 4330ed8ed4...	Linus Torvalds	17 years
v2.6.27-rc8	commit 94aca1dac6...	Linus Torvalds	17 years
v2.6.27-rc7	commit 72d31053f6...	Linus Torvalds	17 years
v2.6.27-rc6	commit adee14b2e1...	Linus Torvalds	17 years
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v2.6.27-rc4	commit 6a55617ed5...	Linus Torvalds	17 years
v2.6.27-rc3	commit 30a2f3c60a...	Linus Torvalds	17 years
v2.6.27-rc2	commit 0967d61ea0...	Linus Torvalds	17 years
v2.6.27-rc1	commit 6e86841d05...	Linus Torvalds	17 years
v2.6.26	commit bce7f793da...	Linus Torvalds	17 years
v2.6.26-rc9	commit b7279469d6...	Linus Torvalds	17 years
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v2.6.26-rc3	commit b8291ad07a...	Linus Torvalds	17 years
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v2.6.25	commit 4b119e21d0...	Linus Torvalds	17 years
v2.6.25-rc9	commit 120dd64cac...	Linus Torvalds	17 years
v2.6.25-rc8	commit 0e81a8ae37...	Linus Torvalds	17 years
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v2.6.25-rc6	commit a978b30af3...	Linus Torvalds	17 years
v2.6.25-rc5	commit cdeeeae056...	Linus Torvalds	18 years
v2.6.25-rc4	commit 29e8c3c304...	Linus Torvalds	18 years
v2.6.25-rc3	commit bfa274e243...	Linus Torvalds	18 years
v2.6.25-rc2	commit 101142c37b...	Linus Torvalds	18 years
v2.6.25-rc1	commit 19af35546d...	Linus Torvalds	18 years
v2.6.24	commit 49914084e7...	Linus Torvalds	18 years
v2.6.24-rc8	commit cbd9c88369...	Linus Torvalds	18 years
v2.6.24-rc7	commit 3ce5445046...	Linus Torvalds	18 years
v2.6.24-rc6	commit ea67db4cdb...	Linus Torvalds	18 years
v2.6.24-rc5	commit 82d29bf6dc...	Linus Torvalds	18 years
v2.6.24-rc4	commit 09b56adc98...	Linus Torvalds	18 years
v2.6.24-rc3	commit d9f8bcbf67...	Linus Torvalds	18 years
v2.6.24-rc2	commit dbeeb816e8...	Linus Torvalds	18 years
v2.6.24-rc1	commit c9927c2bf4...	Linus Torvalds	18 years
v2.6.23	commit bbf25010f1...	Linus Torvalds	18 years
v2.6.23-rc9	commit 3146b39c18...	Linus Torvalds	18 years
v2.6.23-rc8	commit 4942de4a0e...	Linus Torvalds	18 years
v2.6.23-rc7	commit 81cfe79b9c...	Linus Torvalds	18 years
v2.6.23-rc6	commit 0d4cbb5e7f...	Linus Torvalds	18 years
v2.6.23-rc5	commit 40ffbfad6b...	Linus Torvalds	18 years
v2.6.23-rc4	commit b07d68b5ca...	Linus Torvalds	18 years
v2.6.23-rc3	commit 39d3520c92...	Linus Torvalds	18 years
v2.6.23-rc2	commit d4ac2477fa...	Linus Torvalds	18 years
v2.6.23-rc1	commit f695baf2df...	Linus Torvalds	18 years
v2.6.22	commit 7dcca30a32...	Linus Torvalds	18 years
v2.6.22-rc7	commit a38d6181ff...	Linus Torvalds	18 years
v2.6.22-rc6	commit 189548642c...	Linus Torvalds	18 years
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v2.6.22-rc4	commit 5ecd3100e6...	Linus Torvalds	18 years
v2.6.22-rc3	commit c420bc9f09...	Linus Torvalds	18 years
v2.6.22-rc2	commit 55b637c6a0...	Linus Torvalds	18 years
v2.6.22-rc1	commit 39403865d2...	Linus Torvalds	18 years
v2.6.21	commit de46c33745...	Linus Torvalds	18 years
v2.6.21-rc7	commit 94a05509a9...	Linus Torvalds	18 years
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v2.6.20	commit 62d0cfcb27...	Linus Torvalds	19 years
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v2.6.20-rc4	commit bf81b46482...	Linus Torvalds	19 years
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v2.6.19-rc6	commit 44597f65f6...	Linus Torvalds	19 years
v2.6.19-rc5	commit 80c2188127...	Linus Torvalds	19 years
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/* * IUCV network driver * * Copyright IBM Corp. 2001, 2009 * * Author(s): * Original netiucv driver: * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) * Sysfs integration and all bugs therein: * Cornelia Huck (cornelia.huck@de.ibm.com) * PM functions: * Ursula Braun (ursula.braun@de.ibm.com) * * Documentation used: * the source of the original IUCV driver by: * Stefan Hegewald <hegewald@de.ibm.com> * Hartmut Penner <hpenner@de.ibm.com> * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) * Martin Schwidefsky (schwidefsky@de.ibm.com) * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #define KMSG_COMPONENT "netiucv" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #undef DEBUG #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/timer.h> #include <linux/bitops.h> #include <linux/signal.h> #include <linux/string.h> #include <linux/device.h> #include <linux/ip.h> #include <linux/if_arp.h> #include <linux/tcp.h> #include <linux/skbuff.h> #include <linux/ctype.h> #include <net/dst.h> #include <asm/io.h> #include <asm/uaccess.h> #include <net/iucv/iucv.h> #include "fsm.h" MODULE_AUTHOR ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); /** * Debug Facility stuff */ #define IUCV_DBF_SETUP_NAME "iucv_setup" #define IUCV_DBF_SETUP_LEN 32 #define IUCV_DBF_SETUP_PAGES 2 #define IUCV_DBF_SETUP_NR_AREAS 1 #define IUCV_DBF_SETUP_LEVEL 3 #define IUCV_DBF_DATA_NAME "iucv_data" #define IUCV_DBF_DATA_LEN 128 #define IUCV_DBF_DATA_PAGES 2 #define IUCV_DBF_DATA_NR_AREAS 1 #define IUCV_DBF_DATA_LEVEL 2 #define IUCV_DBF_TRACE_NAME "iucv_trace" #define IUCV_DBF_TRACE_LEN 16 #define IUCV_DBF_TRACE_PAGES 4 #define IUCV_DBF_TRACE_NR_AREAS 1 #define IUCV_DBF_TRACE_LEVEL 3 #define IUCV_DBF_TEXT(name,level,text) \ do { \ debug_text_event(iucv_dbf_##name,level,text); \ } while (0) #define IUCV_DBF_HEX(name,level,addr,len) \ do { \ debug_event(iucv_dbf_##name,level,(void*)(addr),len); \ } while (0) DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf); /* Allow to sort out low debug levels early to avoid wasted sprints */ static inline int iucv_dbf_passes(debug_info_t *dbf_grp, int level) { return (level <= dbf_grp->level); } #define IUCV_DBF_TEXT_(name, level, text...) \ do { \ if (iucv_dbf_passes(iucv_dbf_##name, level)) { \ char* __buf = get_cpu_var(iucv_dbf_txt_buf); \ sprintf(__buf, text); \ debug_text_event(iucv_dbf_##name, level, __buf); \ put_cpu_var(iucv_dbf_txt_buf); \ } \ } while (0) #define IUCV_DBF_SPRINTF(name,level,text...) \ do { \ debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ debug_sprintf_event(iucv_dbf_trace, level, text ); \ } while (0) /** * some more debug stuff */ #define IUCV_HEXDUMP16(importance,header,ptr) \ PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ *(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \ *(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \ *(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \ *(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \ *(((char*)ptr)+12),*(((char*)ptr)+13), \ *(((char*)ptr)+14),*(((char*)ptr)+15)); \ PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ *(((char*)ptr)+16),*(((char*)ptr)+17), \ *(((char*)ptr)+18),*(((char*)ptr)+19), \ *(((char*)ptr)+20),*(((char*)ptr)+21), \ *(((char*)ptr)+22),*(((char*)ptr)+23), \ *(((char*)ptr)+24),*(((char*)ptr)+25), \ *(((char*)ptr)+26),*(((char*)ptr)+27), \ *(((char*)ptr)+28),*(((char*)ptr)+29), \ *(((char*)ptr)+30),*(((char*)ptr)+31)); #define PRINTK_HEADER " iucv: " /* for debugging */ /* dummy device to make sure netiucv_pm functions are called */ static struct device *netiucv_dev; static int netiucv_pm_prepare(struct device *); static void netiucv_pm_complete(struct device *); static int netiucv_pm_freeze(struct device *); static int netiucv_pm_restore_thaw(struct device *); static const struct dev_pm_ops netiucv_pm_ops = { .prepare = netiucv_pm_prepare, .complete = netiucv_pm_complete, .freeze = netiucv_pm_freeze, .thaw = netiucv_pm_restore_thaw, .restore = netiucv_pm_restore_thaw, }; static struct device_driver netiucv_driver = { .owner = THIS_MODULE, .name = "netiucv", .bus = &iucv_bus, .pm = &netiucv_pm_ops, }; static int netiucv_callback_connreq(struct iucv_path *, u8 ipvmid[8], u8 ipuser[16]); static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); static struct iucv_handler netiucv_handler = { .path_pending = netiucv_callback_connreq, .path_complete = netiucv_callback_connack, .path_severed = netiucv_callback_connrej, .path_quiesced = netiucv_callback_connsusp, .path_resumed = netiucv_callback_connres, .message_pending = netiucv_callback_rx, .message_complete = netiucv_callback_txdone }; /** * Per connection profiling data */ struct connection_profile { unsigned long maxmulti; unsigned long maxcqueue; unsigned long doios_single; unsigned long doios_multi; unsigned long txlen; unsigned long tx_time; struct timespec send_stamp; unsigned long tx_pending; unsigned long tx_max_pending; }; /** * Representation of one iucv connection */ struct iucv_connection { struct list_head list; struct iucv_path *path; struct sk_buff *rx_buff; struct sk_buff *tx_buff; struct sk_buff_head collect_queue; struct sk_buff_head commit_queue; spinlock_t collect_lock; int collect_len; int max_buffsize; fsm_timer timer; fsm_instance *fsm; struct net_device *netdev; struct connection_profile prof; char userid[9]; }; /** * Linked list of all connection structs. */ static LIST_HEAD(iucv_connection_list); static DEFINE_RWLOCK(iucv_connection_rwlock); /** * Representation of event-data for the * connection state machine. */ struct iucv_event { struct iucv_connection *conn; void *data; }; /** * Private part of the network device structure */ struct netiucv_priv { struct net_device_stats stats; unsigned long tbusy; fsm_instance *fsm; struct iucv_connection *conn; struct device *dev; int pm_state; }; /** * Link level header for a packet. */ struct ll_header { u16 next; }; #define NETIUCV_HDRLEN (sizeof(struct ll_header)) #define NETIUCV_BUFSIZE_MAX 32768 #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) #define NETIUCV_MTU_DEFAULT 9216 #define NETIUCV_QUEUELEN_DEFAULT 50 #define NETIUCV_TIMEOUT_5SEC 5000 /** * Compatibility macros for busy handling * of network devices. */ static inline void netiucv_clear_busy(struct net_device *dev) { struct netiucv_priv *priv = netdev_priv(dev); clear_bit(0, &priv->tbusy); netif_wake_queue(dev); } static inline int netiucv_test_and_set_busy(struct net_device *dev) { struct netiucv_priv *priv = netdev_priv(dev); netif_stop_queue(dev); return test_and_set_bit(0, &priv->tbusy); } static u8 iucvMagic[16] = { 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 }; /** * Convert an iucv userId to its printable * form (strip whitespace at end). * * @param An iucv userId * * @returns The printable string (static data!!) */ static char *netiucv_printname(char *name) { static char tmp[9]; char *p = tmp; memcpy(tmp, name, 8); tmp[8] = '\0'; while (*p && (!isspace(*p))) p++; *p = '\0'; return tmp; } /** * States of the interface statemachine. */ enum dev_states { DEV_STATE_STOPPED, DEV_STATE_STARTWAIT, DEV_STATE_STOPWAIT, DEV_STATE_RUNNING, /** * MUST be always the last element!! */ NR_DEV_STATES }; static const char *dev_state_names[] = { "Stopped", "StartWait", "StopWait", "Running", }; /** * Events of the interface statemachine. */ enum dev_events { DEV_EVENT_START, DEV_EVENT_STOP, DEV_EVENT_CONUP, DEV_EVENT_CONDOWN, /** * MUST be always the last element!! */ NR_DEV_EVENTS }; static const char *dev_event_names[] = { "Start", "Stop", "Connection up", "Connection down", }; /** * Events of the connection statemachine */ enum conn_events { /** * Events, representing callbacks from * lowlevel iucv layer) */ CONN_EVENT_CONN_REQ, CONN_EVENT_CONN_ACK, CONN_EVENT_CONN_REJ, CONN_EVENT_CONN_SUS, CONN_EVENT_CONN_RES, CONN_EVENT_RX, CONN_EVENT_TXDONE, /** * Events, representing errors return codes from * calls to lowlevel iucv layer */ /** * Event, representing timer expiry. */ CONN_EVENT_TIMER, /** * Events, representing commands from upper levels. */ CONN_EVENT_START, CONN_EVENT_STOP, /** * MUST be always the last element!! */ NR_CONN_EVENTS, }; static const char *conn_event_names[] = { "Remote connection request", "Remote connection acknowledge", "Remote connection reject", "Connection suspended", "Connection resumed", "Data received", "Data sent", "Timer", "Start", "Stop", }; /** * States of the connection statemachine. */ enum conn_states { /** * Connection not assigned to any device, * initial state, invalid */ CONN_STATE_INVALID, /** * Userid assigned but not operating */ CONN_STATE_STOPPED, /** * Connection registered, * no connection request sent yet, * no connection request received */ CONN_STATE_STARTWAIT, /** * Connection registered and connection request sent, * no acknowledge and no connection request received yet. */ CONN_STATE_SETUPWAIT, /** * Connection up and running idle */ CONN_STATE_IDLE, /** * Data sent, awaiting CONN_EVENT_TXDONE */ CONN_STATE_TX, /** * Error during registration. */ CONN_STATE_REGERR, /** * Error during registration. */ CONN_STATE_CONNERR, /** * MUST be always the last element!! */ NR_CONN_STATES, }; static const char *conn_state_names[] = { "Invalid", "Stopped", "StartWait", "SetupWait", "Idle", "TX", "Terminating", "Registration error", "Connect error", }; /** * Debug Facility Stuff */ static debug_info_t *iucv_dbf_setup = NULL; static debug_info_t *iucv_dbf_data = NULL; static debug_info_t *iucv_dbf_trace = NULL; DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); static void iucv_unregister_dbf_views(void) { if (iucv_dbf_setup) debug_unregister(iucv_dbf_setup); if (iucv_dbf_data) debug_unregister(iucv_dbf_data); if (iucv_dbf_trace) debug_unregister(iucv_dbf_trace); } static int iucv_register_dbf_views(void) { iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, IUCV_DBF_SETUP_PAGES, IUCV_DBF_SETUP_NR_AREAS, IUCV_DBF_SETUP_LEN); iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, IUCV_DBF_DATA_PAGES, IUCV_DBF_DATA_NR_AREAS, IUCV_DBF_DATA_LEN); iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, IUCV_DBF_TRACE_PAGES, IUCV_DBF_TRACE_NR_AREAS, IUCV_DBF_TRACE_LEN); if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || (iucv_dbf_trace == NULL)) { iucv_unregister_dbf_views(); return -ENOMEM; } debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); return 0; } /* * Callback-wrappers, called from lowlevel iucv layer. */ static void netiucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) { struct iucv_connection *conn = path->private; struct iucv_event ev; ev.conn = conn; ev.data = msg; fsm_event(conn->fsm, CONN_EVENT_RX, &ev); } static void netiucv_callback_txdone(struct iucv_path *path, struct iucv_message *msg) { struct iucv_connection *conn = path->private; struct iucv_event ev; ev.conn = conn; ev.data = msg; fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); } static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) { struct iucv_connection *conn = path->private; fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); } static int netiucv_callback_connreq(struct iucv_path *path, u8 ipvmid[8], u8 ipuser[16]) { struct iucv_connection *conn = path->private; struct iucv_event ev; int rc; if (memcmp(iucvMagic, ipuser, sizeof(ipuser))) /* ipuser must match iucvMagic. */ return -EINVAL; rc = -EINVAL; read_lock_bh(&iucv_connection_rwlock); list_for_each_entry(conn, &iucv_connection_list, list) { if (strncmp(ipvmid, conn->userid, 8)) continue; /* Found a matching connection for this path. */ conn->path = path; ev.conn = conn; ev.data = path; fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); rc = 0; } read_unlock_bh(&iucv_connection_rwlock); return rc; } static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) { struct iucv_connection *conn = path->private; fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); } static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) { struct iucv_connection *conn = path->private; fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); } static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) { struct iucv_connection *conn = path->private; fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); } /** * NOP action for statemachines */ static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) { } /* * Actions of the connection statemachine */ /** * netiucv_unpack_skb * @conn: The connection where this skb has been received. * @pskb: The received skb. * * Unpack a just received skb and hand it over to upper layers. * Helper function for conn_action_rx. */ static void netiucv_unpack_skb(struct iucv_connection *conn, struct sk_buff *pskb) { struct net_device *dev = conn->netdev; struct netiucv_priv *privptr = netdev_priv(dev); u16 offset = 0; skb_put(pskb, NETIUCV_HDRLEN); pskb->dev = dev; pskb->ip_summed = CHECKSUM_NONE; pskb->protocol = ntohs(ETH_P_IP); while (1) { struct sk_buff *skb; struct ll_header *header = (struct ll_header *) pskb->data; if (!header->next) break; skb_pull(pskb, NETIUCV_HDRLEN); header->next -= offset; offset += header->next; header->next -= NETIUCV_HDRLEN; if (skb_tailroom(pskb) < header->next) { IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", header->next, skb_tailroom(pskb)); return; } skb_put(pskb, header->next); skb_reset_mac_header(pskb); skb = dev_alloc_skb(pskb->len); if (!skb) { IUCV_DBF_TEXT(data, 2, "Out of memory in netiucv_unpack_skb\n"); privptr->stats.rx_dropped++; return; } skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), pskb->len); skb_reset_mac_header(skb); skb->dev = pskb->dev; skb->protocol = pskb->protocol; pskb->ip_summed = CHECKSUM_UNNECESSARY; privptr->stats.rx_packets++; privptr->stats.rx_bytes += skb->len; /* * Since receiving is always initiated from a tasklet (in iucv.c), * we must use netif_rx_ni() instead of netif_rx() */ netif_rx_ni(skb); skb_pull(pskb, header->next); skb_put(pskb, NETIUCV_HDRLEN); } } static void conn_action_rx(fsm_instance *fi, int event, void *arg) { struct iucv_event *ev = arg; struct iucv_connection *conn = ev->conn; struct iucv_message *msg = ev->data; struct netiucv_priv *privptr = netdev_priv(conn->netdev); int rc; IUCV_DBF_TEXT(trace, 4, __func__); if (!conn->netdev) { iucv_message_reject(conn->path, msg); IUCV_DBF_TEXT(data, 2, "Received data for unlinked connection\n"); return; } if (msg->length > conn->max_buffsize) { iucv_message_reject(conn->path, msg); privptr->stats.rx_dropped++; IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", msg->length, conn->max_buffsize); return; } conn->rx_buff->data = conn->rx_buff->head; skb_reset_tail_pointer(conn->rx_buff); conn->rx_buff->len = 0; rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, msg->length, NULL); if (rc || msg->length < 5) { privptr->stats.rx_errors++; IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); return; } netiucv_unpack_skb(conn, conn->rx_buff); } static void conn_action_txdone(fsm_instance *fi, int event, void *arg) { struct iucv_event *ev = arg; struct iucv_connection *conn = ev->conn; struct iucv_message *msg = ev->data; struct iucv_message txmsg; struct netiucv_priv *privptr = NULL; u32 single_flag = msg->tag; u32 txbytes = 0; u32 txpackets = 0; u32 stat_maxcq = 0; struct sk_buff *skb; unsigned long saveflags; struct ll_header header; int rc; IUCV_DBF_TEXT(trace, 4, __func__); if (conn && conn->netdev) privptr = netdev_priv(conn->netdev); conn->prof.tx_pending--; if (single_flag) { if ((skb = skb_dequeue(&conn->commit_queue))) { atomic_dec(&skb->users); if (privptr) { privptr->stats.tx_packets++; privptr->stats.tx_bytes += (skb->len - NETIUCV_HDRLEN - NETIUCV_HDRLEN); } dev_kfree_skb_any(skb); } } conn->tx_buff->data = conn->tx_buff->head; skb_reset_tail_pointer(conn->tx_buff); conn->tx_buff->len = 0; spin_lock_irqsave(&conn->collect_lock, saveflags); while ((skb = skb_dequeue(&conn->collect_queue))) { header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); skb_copy_from_linear_data(skb, skb_put(conn->tx_buff, skb->len), skb->len); txbytes += skb->len; txpackets++; stat_maxcq++; atomic_dec(&skb->users); dev_kfree_skb_any(skb); } if (conn->collect_len > conn->prof.maxmulti) conn->prof.maxmulti = conn->collect_len; conn->collect_len = 0; spin_unlock_irqrestore(&conn->collect_lock, saveflags); if (conn->tx_buff->len == 0) { fsm_newstate(fi, CONN_STATE_IDLE); return; } header.next = 0; memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); conn->prof.send_stamp = current_kernel_time(); txmsg.class = 0; txmsg.tag = 0; rc = iucv_message_send(conn->path, &txmsg, 0, 0, conn->tx_buff->data, conn->tx_buff->len); conn->prof.doios_multi++; conn->prof.txlen += conn->tx_buff->len; conn->prof.tx_pending++; if (conn->prof.tx_pending > conn->prof.tx_max_pending) conn->prof.tx_max_pending = conn->prof.tx_pending; if (rc) { conn->prof.tx_pending--; fsm_newstate(fi, CONN_STATE_IDLE); if (privptr) privptr->stats.tx_errors += txpackets; IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); } else { if (privptr) { privptr->stats.tx_packets += txpackets; privptr->stats.tx_bytes += txbytes; } if (stat_maxcq > conn->prof.maxcqueue) conn->prof.maxcqueue = stat_maxcq; } } static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) { struct iucv_event *ev = arg; struct iucv_connection *conn = ev->conn; struct iucv_path *path = ev->data; struct net_device *netdev = conn->netdev; struct netiucv_priv *privptr = netdev_priv(netdev); int rc; IUCV_DBF_TEXT(trace, 3, __func__); conn->path = path; path->msglim = NETIUCV_QUEUELEN_DEFAULT; path->flags = 0; rc = iucv_path_accept(path, &netiucv_handler, NULL, conn); if (rc) { IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); return; } fsm_newstate(fi, CONN_STATE_IDLE); netdev->tx_queue_len = conn->path->msglim; fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); } static void conn_action_connreject(fsm_instance *fi, int event, void *arg) { struct iucv_event *ev = arg; struct iucv_path *path = ev->data; IUCV_DBF_TEXT(trace, 3, __func__); iucv_path_sever(path, NULL); } static void conn_action_connack(fsm_instance *fi, int event, void *arg) { struct iucv_connection *conn = arg; struct net_device *netdev = conn->netdev; struct netiucv_priv *privptr = netdev_priv(netdev); IUCV_DBF_TEXT(trace, 3, __func__); fsm_deltimer(&conn->timer); fsm_newstate(fi, CONN_STATE_IDLE); netdev->tx_queue_len = conn->path->msglim; fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); } static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) { struct iucv_connection *conn = arg; IUCV_DBF_TEXT(trace, 3, __func__); fsm_deltimer(&conn->timer); iucv_path_sever(conn->path, NULL); fsm_newstate(fi, CONN_STATE_STARTWAIT); } static void conn_action_connsever(fsm_instance *fi, int event, void *arg) { struct iucv_connection *conn = arg; struct net_device *netdev = conn->netdev; struct netiucv_priv *privptr = netdev_priv(netdev); IUCV_DBF_TEXT(trace, 3, __func__); fsm_deltimer(&conn->timer); iucv_path_sever(conn->path, NULL); dev_info(privptr->dev, "The peer interface of the IUCV device" " has closed the connection\n"); IUCV_DBF_TEXT(data, 2, "conn_action_connsever: Remote dropped connection\n"); fsm_newstate(fi, CONN_STATE_STARTWAIT); fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); } static void conn_action_start(fsm_instance *fi, int event, void *arg) { struct iucv_connection *conn = arg; struct net_device *netdev = conn->netdev; struct netiucv_priv *privptr = netdev_priv(netdev); int rc; IUCV_DBF_TEXT(trace, 3, __func__); fsm_newstate(fi, CONN_STATE_STARTWAIT); IUCV_DBF_TEXT_(setup, 2, "%s('%s'): connecting ...\n", netdev->name, conn->userid); /* * We must set the state before calling iucv_connect because the * callback handler could be called at any point after the connection * request is sent */ fsm_newstate(fi, CONN_STATE_SETUPWAIT); conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, NULL, iucvMagic, conn); switch (rc) { case 0: netdev->tx_queue_len = conn->path->msglim; fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, CONN_EVENT_TIMER, conn); return; case 11: dev_warn(privptr->dev, "The IUCV device failed to connect to z/VM guest %s\n", netiucv_printname(conn->userid)); fsm_newstate(fi, CONN_STATE_STARTWAIT); break; case 12: dev_warn(privptr->dev, "The IUCV device failed to connect to the peer on z/VM" " guest %s\n", netiucv_printname(conn->userid)); fsm_newstate(fi, CONN_STATE_STARTWAIT); break; case 13: dev_err(privptr->dev, "Connecting the IUCV device would exceed the maximum" " number of IUCV connections\n"); fsm_newstate(fi, CONN_STATE_CONNERR); break; case 14: dev_err(privptr->dev, "z/VM guest %s has too many IUCV connections" " to connect with the IUCV device\n", netiucv_printname(conn->userid)); fsm_newstate(fi, CONN_STATE_CONNERR); break; case 15: dev_err(privptr->dev, "The IUCV device cannot connect to a z/VM guest with no" " IUCV authorization\n"); fsm_newstate(fi, CONN_STATE_CONNERR); break; default: dev_err(privptr->dev, "Connecting the IUCV device failed with error %d\n", rc); fsm_newstate(fi, CONN_STATE_CONNERR); break; } IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); kfree(conn->path); conn->path = NULL; } static void netiucv_purge_skb_queue(struct sk_buff_head *q) { struct sk_buff *skb; while ((skb = skb_dequeue(q))) { atomic_dec(&skb->users); dev_kfree_skb_any(skb); } } static void conn_action_stop(fsm_instance *fi, int event, void *arg) { struct iucv_event *ev = arg; struct iucv_connection *conn = ev->conn; struct net_device *netdev = conn->netdev; struct netiucv_priv *privptr = netdev_priv(netdev); IUCV_DBF_TEXT(trace, 3, __func__); fsm_deltimer(&conn->timer); fsm_newstate(fi, CONN_STATE_STOPPED); netiucv_purge_skb_queue(&conn->collect_queue); if (conn->path) { IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); iucv_path_sever(conn->path, iucvMagic); kfree(conn->path); conn->path = NULL; } netiucv_purge_skb_queue(&conn->commit_queue); fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); } static void conn_action_inval(fsm_instance *fi, int event, void *arg) { struct iucv_connection *conn = arg; struct net_device *netdev = conn->netdev; IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", netdev->name, conn->userid); } static const fsm_node conn_fsm[] = { { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, }; static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); /* * Actions for interface - statemachine. */ /** * dev_action_start * @fi: An instance of an interface statemachine. * @event: The event, just happened. * @arg: Generic pointer, casted from struct net_device * upon call. * * Startup connection by sending CONN_EVENT_START to it. */ static void dev_action_start(fsm_instance *fi, int event, void *arg) { struct net_device *dev = arg; struct netiucv_priv *privptr = netdev_priv(dev); IUCV_DBF_TEXT(trace, 3, __func__); fsm_newstate(fi, DEV_STATE_STARTWAIT); fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); } /** * Shutdown connection by sending CONN_EVENT_STOP to it. * * @param fi An instance of an interface statemachine. * @param event The event, just happened. * @param arg Generic pointer, casted from struct net_device * upon call. */ static void dev_action_stop(fsm_instance *fi, int event, void *arg) { struct net_device *dev = arg; struct netiucv_priv *privptr = netdev_priv(dev); struct iucv_event ev; IUCV_DBF_TEXT(trace, 3, __func__); ev.conn = privptr->conn; fsm_newstate(fi, DEV_STATE_STOPWAIT); fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); } /** * Called from connection statemachine * when a connection is up and running. * * @param fi An instance of an interface statemachine. * @param event The event, just happened. * @param arg Generic pointer, casted from struct net_device * upon call. */ static void dev_action_connup(fsm_instance *fi, int event, void *arg) { struct net_device *dev = arg; struct netiucv_priv *privptr = netdev_priv(dev); IUCV_DBF_TEXT(trace, 3, __func__); switch (fsm_getstate(fi)) { case DEV_STATE_STARTWAIT: fsm_newstate(fi, DEV_STATE_RUNNING); dev_info(privptr->dev, "The IUCV device has been connected" " successfully to %s\n", privptr->conn->userid); IUCV_DBF_TEXT(setup, 3, "connection is up and running\n"); break; case DEV_STATE_STOPWAIT: IUCV_DBF_TEXT(data, 2, "dev_action_connup: in DEV_STATE_STOPWAIT\n"); break; } } /** * Called from connection statemachine * when a connection has been shutdown. * * @param fi An instance of an interface statemachine. * @param event The event, just happened. * @param arg Generic pointer, casted from struct net_device * upon call. */ static void dev_action_conndown(fsm_instance *fi, int event, void *arg) { IUCV_DBF_TEXT(trace, 3, __func__); switch (fsm_getstate(fi)) { case DEV_STATE_RUNNING: fsm_newstate(fi, DEV_STATE_STARTWAIT); break; case DEV_STATE_STOPWAIT: fsm_newstate(fi, DEV_STATE_STOPPED); IUCV_DBF_TEXT(setup, 3, "connection is down\n"); break; } } static const fsm_node dev_fsm[] = { { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, }; static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); /** * Transmit a packet. * This is a helper function for netiucv_tx(). * * @param conn Connection to be used for sending. * @param skb Pointer to struct sk_buff of packet to send. * The linklevel header has already been set up * by netiucv_tx(). * * @return 0 on success, -ERRNO on failure. (Never fails.) */ static int netiucv_transmit_skb(struct iucv_connection *conn, struct sk_buff *skb) { struct iucv_message msg; unsigned long saveflags; struct ll_header header; int rc; if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { int l = skb->len + NETIUCV_HDRLEN; spin_lock_irqsave(&conn->collect_lock, saveflags); if (conn->collect_len + l > (conn->max_buffsize - NETIUCV_HDRLEN)) { rc = -EBUSY; IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_transmit_skb\n"); } else { atomic_inc(&skb->users); skb_queue_tail(&conn->collect_queue, skb); conn->collect_len += l; rc = 0; } spin_unlock_irqrestore(&conn->collect_lock, saveflags); } else { struct sk_buff *nskb = skb; /** * Copy the skb to a new allocated skb in lowmem only if the * data is located above 2G in memory or tailroom is < 2. */ unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + NETIUCV_HDRLEN)) >> 31; int copied = 0; if (hi || (skb_tailroom(skb) < 2)) { nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); if (!nskb) { IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); rc = -ENOMEM; return rc; } else { skb_reserve(nskb, NETIUCV_HDRLEN); memcpy(skb_put(nskb, skb->len), skb->data, skb->len); } copied = 1; } /** * skb now is below 2G and has enough room. Add headers. */ header.next = nskb->len + NETIUCV_HDRLEN; memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); header.next = 0; memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); fsm_newstate(conn->fsm, CONN_STATE_TX); conn->prof.send_stamp = current_kernel_time(); msg.tag = 1; msg.class = 0; rc = iucv_message_send(conn->path, &msg, 0, 0, nskb->data, nskb->len); conn->prof.doios_single++; conn->prof.txlen += skb->len; conn->prof.tx_pending++; if (conn->prof.tx_pending > conn->prof.tx_max_pending) conn->prof.tx_max_pending = conn->prof.tx_pending; if (rc) { struct netiucv_priv *privptr; fsm_newstate(conn->fsm, CONN_STATE_IDLE); conn->prof.tx_pending--; privptr = netdev_priv(conn->netdev); if (privptr) privptr->stats.tx_errors++; if (copied) dev_kfree_skb(nskb); else { /** * Remove our headers. They get added * again on retransmit. */ skb_pull(skb, NETIUCV_HDRLEN); skb_trim(skb, skb->len - NETIUCV_HDRLEN); } IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); } else { if (copied) dev_kfree_skb(skb); atomic_inc(&nskb->users); skb_queue_tail(&conn->commit_queue, nskb); } } return rc; } /* * Interface API for upper network layers */ /** * Open an interface. * Called from generic network layer when ifconfig up is run. * * @param dev Pointer to interface struct. * * @return 0 on success, -ERRNO on failure. (Never fails.) */ static int netiucv_open(struct net_device *dev) { struct netiucv_priv *priv = netdev_priv(dev); fsm_event(priv->fsm, DEV_EVENT_START, dev); return 0; } /** * Close an interface. * Called from generic network layer when ifconfig down is run. * * @param dev Pointer to interface struct. * * @return 0 on success, -ERRNO on failure. (Never fails.) */ static int netiucv_close(struct net_device *dev) { struct netiucv_priv *priv = netdev_priv(dev); fsm_event(priv->fsm, DEV_EVENT_STOP, dev); return 0; } static int netiucv_pm_prepare(struct device *dev) { IUCV_DBF_TEXT(trace, 3, __func__); return 0; } static void netiucv_pm_complete(struct device *dev) { IUCV_DBF_TEXT(trace, 3, __func__); return; } /** * netiucv_pm_freeze() - Freeze PM callback * @dev: netiucv device * * close open netiucv interfaces */ static int netiucv_pm_freeze(struct device *dev) { struct netiucv_priv *priv = dev_get_drvdata(dev); struct net_device *ndev = NULL; int rc = 0; IUCV_DBF_TEXT(trace, 3, __func__); if (priv && priv->conn) ndev = priv->conn->netdev; if (!ndev) goto out; netif_device_detach(ndev); priv->pm_state = fsm_getstate(priv->fsm); rc = netiucv_close(ndev); out: return rc; } /** * netiucv_pm_restore_thaw() - Thaw and restore PM callback * @dev: netiucv device * * re-open netiucv interfaces closed during freeze */ static int netiucv_pm_restore_thaw(struct device *dev) { struct netiucv_priv *priv = dev_get_drvdata(dev); struct net_device *ndev = NULL; int rc = 0; IUCV_DBF_TEXT(trace, 3, __func__); if (priv && priv->conn) ndev = priv->conn->netdev; if (!ndev) goto out; switch (priv->pm_state) { case DEV_STATE_RUNNING: case DEV_STATE_STARTWAIT: rc = netiucv_open(ndev); break; default: break; } netif_device_attach(ndev); out: return rc; } /** * Start transmission of a packet. * Called from generic network device layer. * * @param skb Pointer to buffer containing the packet. * @param dev Pointer to interface struct. * * @return 0 if packet consumed, !0 if packet rejected. * Note: If we return !0, then the packet is free'd by * the generic network layer. */ static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) { struct netiucv_priv *privptr = netdev_priv(dev); int rc; IUCV_DBF_TEXT(trace, 4, __func__); /** * Some sanity checks ... */ if (skb == NULL) { IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); privptr->stats.tx_dropped++; return NETDEV_TX_OK; } if (skb_headroom(skb) < NETIUCV_HDRLEN) { IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); dev_kfree_skb(skb); privptr->stats.tx_dropped++; return NETDEV_TX_OK; } /** * If connection is not running, try to restart it * and throw away packet. */ if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { dev_kfree_skb(skb); privptr->stats.tx_dropped++; privptr->stats.tx_errors++; privptr->stats.tx_carrier_errors++; return NETDEV_TX_OK; } if (netiucv_test_and_set_busy(dev)) { IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); return NETDEV_TX_BUSY; } dev->trans_start = jiffies; rc = netiucv_transmit_skb(privptr->conn, skb); netiucv_clear_busy(dev); return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; } /** * netiucv_stats * @dev: Pointer to interface struct. * * Returns interface statistics of a device. * * Returns pointer to stats struct of this interface. */ static struct net_device_stats *netiucv_stats (struct net_device * dev) { struct netiucv_priv *priv = netdev_priv(dev); IUCV_DBF_TEXT(trace, 5, __func__); return &priv->stats; } /** * netiucv_change_mtu * @dev: Pointer to interface struct. * @new_mtu: The new MTU to use for this interface. * * Sets MTU of an interface. * * Returns 0 on success, -EINVAL if MTU is out of valid range. * (valid range is 576 .. NETIUCV_MTU_MAX). */ static int netiucv_change_mtu(struct net_device * dev, int new_mtu) { IUCV_DBF_TEXT(trace, 3, __func__); if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); return -EINVAL; } dev->mtu = new_mtu; return 0; } /* * attributes in sysfs */ static ssize_t user_show(struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); } static ssize_t user_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); struct net_device *ndev = priv->conn->netdev; char *p; char *tmp; char username[9]; int i; struct iucv_connection *cp; IUCV_DBF_TEXT(trace, 3, __func__); if (count > 9) { IUCV_DBF_TEXT_(setup, 2, "%d is length of username\n", (int) count); return -EINVAL; } tmp = strsep((char **) &buf, "\n"); for (i = 0, p = tmp; i < 8 && *p; i++, p++) { if (isalnum(*p) || (*p == '$')) { username[i]= toupper(*p); continue; } if (*p == '\n') { /* trailing lf, grr */ break; } IUCV_DBF_TEXT_(setup, 2, "username: invalid character %c\n", *p); return -EINVAL; } while (i < 8) username[i++] = ' '; username[8] = '\0'; if (memcmp(username, priv->conn->userid, 9) && (ndev->flags & (IFF_UP | IFF_RUNNING))) { /* username changed while the interface is active. */ IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); return -EPERM; } read_lock_bh(&iucv_connection_rwlock); list_for_each_entry(cp, &iucv_connection_list, list) { if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) { read_unlock_bh(&iucv_connection_rwlock); IUCV_DBF_TEXT_(setup, 2, "user_write: Connection " "to %s already exists\n", username); return -EEXIST; } } read_unlock_bh(&iucv_connection_rwlock); memcpy(priv->conn->userid, username, 9); return count; } static DEVICE_ATTR(user, 0644, user_show, user_write); static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%d\n", priv->conn->max_buffsize); } static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); struct net_device *ndev = priv->conn->netdev; char *e; int bs1; IUCV_DBF_TEXT(trace, 3, __func__); if (count >= 39) return -EINVAL; bs1 = simple_strtoul(buf, &e, 0); if (e && (!isspace(*e))) { IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); return -EINVAL; } if (bs1 > NETIUCV_BUFSIZE_MAX) { IUCV_DBF_TEXT_(setup, 2, "buffer_write: buffer size %d too large\n", bs1); return -EINVAL; } if ((ndev->flags & IFF_RUNNING) && (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { IUCV_DBF_TEXT_(setup, 2, "buffer_write: buffer size %d too small\n", bs1); return -EINVAL; } if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { IUCV_DBF_TEXT_(setup, 2, "buffer_write: buffer size %d too small\n", bs1); return -EINVAL; } priv->conn->max_buffsize = bs1; if (!(ndev->flags & IFF_RUNNING)) ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; return count; } static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); } static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); static ssize_t conn_fsm_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); } static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); static ssize_t maxmulti_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); } static ssize_t maxmulti_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.maxmulti = 0; return count; } static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); } static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.maxcqueue = 0; return count; } static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); } static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.doios_single = 0; return count; } static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); } static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); priv->conn->prof.doios_multi = 0; return count; } static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.txlen); } static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.txlen = 0; return count; } static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); } static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.tx_time = 0; return count; } static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); } static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.tx_pending = 0; return count; } static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, char *buf) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 5, __func__); return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); } static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct netiucv_priv *priv = dev_get_drvdata(dev); IUCV_DBF_TEXT(trace, 4, __func__); priv->conn->prof.tx_max_pending = 0; return count; } static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); static struct attribute *netiucv_attrs[] = { &dev_attr_buffer.attr, &dev_attr_user.attr, NULL, }; static struct attribute_group netiucv_attr_group = { .attrs = netiucv_attrs, }; static struct attribute *netiucv_stat_attrs[] = { &dev_attr_device_fsm_state.attr, &dev_attr_connection_fsm_state.attr, &dev_attr_max_tx_buffer_used.attr, &dev_attr_max_chained_skbs.attr, &dev_attr_tx_single_write_ops.attr, &dev_attr_tx_multi_write_ops.attr, &dev_attr_netto_bytes.attr, &dev_attr_max_tx_io_time.attr, &dev_attr_tx_pending.attr, &dev_attr_tx_max_pending.attr, NULL, }; static struct attribute_group netiucv_stat_attr_group = { .name = "stats", .attrs = netiucv_stat_attrs, }; static int netiucv_add_files(struct device *dev) { int ret; IUCV_DBF_TEXT(trace, 3, __func__); ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); if (ret) return ret; ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); if (ret) sysfs_remove_group(&dev->kobj, &netiucv_attr_group); return ret; } static void netiucv_remove_files(struct device *dev) { IUCV_DBF_TEXT(trace, 3, __func__); sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); sysfs_remove_group(&dev->kobj, &netiucv_attr_group); } static int netiucv_register_device(struct net_device *ndev) { struct netiucv_priv *priv = netdev_priv(ndev); struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); int ret; IUCV_DBF_TEXT(trace, 3, __func__); if (dev) { dev_set_name(dev, "net%s", ndev->name); dev->bus = &iucv_bus; dev->parent = iucv_root; /* * The release function could be called after the * module has been unloaded. It's _only_ task is to * free the struct. Therefore, we specify kfree() * directly here. (Probably a little bit obfuscating * but legitime ...). */ dev->release = (void (*)(struct device *))kfree; dev->driver = &netiucv_driver; } else return -ENOMEM; ret = device_register(dev); if (ret) { put_device(dev); return ret; } ret = netiucv_add_files(dev); if (ret) goto out_unreg; priv->dev = dev; dev_set_drvdata(dev, priv); return 0; out_unreg: device_unregister(dev); return ret; } static void netiucv_unregister_device(struct device *dev) { IUCV_DBF_TEXT(trace, 3, __func__); netiucv_remove_files(dev); device_unregister(dev); } /** * Allocate and initialize a new connection structure. * Add it to the list of netiucv connections; */ static struct iucv_connection *netiucv_new_connection(struct net_device *dev, char *username) { struct iucv_connection *conn; conn = kzalloc(sizeof(*conn), GFP_KERNEL); if (!conn) goto out; skb_queue_head_init(&conn->collect_queue); skb_queue_head_init(&conn->commit_queue); spin_lock_init(&conn->collect_lock); conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; conn->netdev = dev; conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); if (!conn->rx_buff) goto out_conn; conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); if (!conn->tx_buff) goto out_rx; conn->fsm = init_fsm("netiucvconn", conn_state_names, conn_event_names, NR_CONN_STATES, NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, GFP_KERNEL); if (!conn->fsm) goto out_tx; fsm_settimer(conn->fsm, &conn->timer); fsm_newstate(conn->fsm, CONN_STATE_INVALID); if (username) { memcpy(conn->userid, username, 9); fsm_newstate(conn->fsm, CONN_STATE_STOPPED); } write_lock_bh(&iucv_connection_rwlock); list_add_tail(&conn->list, &iucv_connection_list); write_unlock_bh(&iucv_connection_rwlock); return conn; out_tx: kfree_skb(conn->tx_buff); out_rx: kfree_skb(conn->rx_buff); out_conn: kfree(conn); out: return NULL; } /** * Release a connection structure and remove it from the * list of netiucv connections. */ static void netiucv_remove_connection(struct iucv_connection *conn) { IUCV_DBF_TEXT(trace, 3, __func__); write_lock_bh(&iucv_connection_rwlock); list_del_init(&conn->list); write_unlock_bh(&iucv_connection_rwlock); fsm_deltimer(&conn->timer); netiucv_purge_skb_queue(&conn->collect_queue); if (conn->path) { iucv_path_sever(conn->path, iucvMagic); kfree(conn->path); conn->path = NULL; } netiucv_purge_skb_queue(&conn->commit_queue); kfree_fsm(conn->fsm); kfree_skb(conn->rx_buff); kfree_skb(conn->tx_buff); } /** * Release everything of a net device. */ static void netiucv_free_netdevice(struct net_device *dev) { struct netiucv_priv *privptr = netdev_priv(dev); IUCV_DBF_TEXT(trace, 3, __func__); if (!dev) return; if (privptr) { if (privptr->conn) netiucv_remove_connection(privptr->conn); if (privptr->fsm) kfree_fsm(privptr->fsm); privptr->conn = NULL; privptr->fsm = NULL; /* privptr gets freed by free_netdev() */ } free_netdev(dev); } /** * Initialize a net device. (Called from kernel in alloc_netdev()) */ static const struct net_device_ops netiucv_netdev_ops = { .ndo_open = netiucv_open, .ndo_stop = netiucv_close, .ndo_get_stats = netiucv_stats, .ndo_start_xmit = netiucv_tx, .ndo_change_mtu = netiucv_change_mtu, }; static void netiucv_setup_netdevice(struct net_device *dev) { dev->mtu = NETIUCV_MTU_DEFAULT; dev->destructor = netiucv_free_netdevice; dev->hard_header_len = NETIUCV_HDRLEN; dev->addr_len = 0; dev->type = ARPHRD_SLIP; dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; dev->flags = IFF_POINTOPOINT | IFF_NOARP; dev->netdev_ops = &netiucv_netdev_ops; } /** * Allocate and initialize everything of a net device. */ static struct net_device *netiucv_init_netdevice(char *username) { struct netiucv_priv *privptr; struct net_device *dev; dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", netiucv_setup_netdevice); if (!dev) return NULL; if (dev_alloc_name(dev, dev->name) < 0) goto out_netdev; privptr = netdev_priv(dev); privptr->fsm = init_fsm("netiucvdev", dev_state_names, dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, dev_fsm, DEV_FSM_LEN, GFP_KERNEL); if (!privptr->fsm) goto out_netdev; privptr->conn = netiucv_new_connection(dev, username); if (!privptr->conn) { IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); goto out_fsm; } fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); return dev; out_fsm: kfree_fsm(privptr->fsm); out_netdev: free_netdev(dev); return NULL; } static ssize_t conn_write(struct device_driver *drv, const char *buf, size_t count) { const char *p; char username[9]; int i, rc; struct net_device *dev; struct netiucv_priv *priv; struct iucv_connection *cp; IUCV_DBF_TEXT(trace, 3, __func__); if (count>9) { IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); return -EINVAL; } for (i = 0, p = buf; i < 8 && *p; i++, p++) { if (isalnum(*p) || *p == '$') { username[i] = toupper(*p); continue; } if (*p == '\n') /* trailing lf, grr */ break; IUCV_DBF_TEXT_(setup, 2, "conn_write: invalid character %c\n", *p); return -EINVAL; } while (i < 8) username[i++] = ' '; username[8] = '\0'; read_lock_bh(&iucv_connection_rwlock); list_for_each_entry(cp, &iucv_connection_list, list) { if (!strncmp(username, cp->userid, 9)) { read_unlock_bh(&iucv_connection_rwlock); IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection " "to %s already exists\n", username); return -EEXIST; } } read_unlock_bh(&iucv_connection_rwlock); dev = netiucv_init_netdevice(username); if (!dev) { IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); return -ENODEV; } rc = netiucv_register_device(dev); if (rc) { IUCV_DBF_TEXT_(setup, 2, "ret %d from netiucv_register_device\n", rc); goto out_free_ndev; } /* sysfs magic */ priv = netdev_priv(dev); SET_NETDEV_DEV(dev, priv->dev); rc = register_netdev(dev); if (rc) goto out_unreg; dev_info(priv->dev, "The IUCV interface to %s has been" " established successfully\n", netiucv_printname(username)); return count; out_unreg: netiucv_unregister_device(priv->dev); out_free_ndev: netiucv_free_netdevice(dev); return rc; } static DRIVER_ATTR(connection, 0200, NULL, conn_write); static ssize_t remove_write (struct device_driver *drv, const char *buf, size_t count) { struct iucv_connection *cp; struct net_device *ndev; struct netiucv_priv *priv; struct device *dev; char name[IFNAMSIZ]; const char *p; int i; IUCV_DBF_TEXT(trace, 3, __func__); if (count >= IFNAMSIZ) count = IFNAMSIZ - 1; for (i = 0, p = buf; i < count && *p; i++, p++) { if (*p == '\n' || *p == ' ') /* trailing lf, grr */ break; name[i] = *p; } name[i] = '\0'; read_lock_bh(&iucv_connection_rwlock); list_for_each_entry(cp, &iucv_connection_list, list) { ndev = cp->netdev; priv = netdev_priv(ndev); dev = priv->dev; if (strncmp(name, ndev->name, count)) continue; read_unlock_bh(&iucv_connection_rwlock); if (ndev->flags & (IFF_UP | IFF_RUNNING)) { dev_warn(dev, "The IUCV device is connected" " to %s and cannot be removed\n", priv->conn->userid); IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); return -EPERM; } unregister_netdev(ndev); netiucv_unregister_device(dev); return count; } read_unlock_bh(&iucv_connection_rwlock); IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); return -EINVAL; } static DRIVER_ATTR(remove, 0200, NULL, remove_write); static struct attribute * netiucv_drv_attrs[] = { &driver_attr_connection.attr, &driver_attr_remove.attr, NULL, }; static struct attribute_group netiucv_drv_attr_group = { .attrs = netiucv_drv_attrs, }; static const struct attribute_group *netiucv_drv_attr_groups[] = { &netiucv_drv_attr_group, NULL, }; static void netiucv_banner(void) { pr_info("driver initialized\n");