1b59618ce4
https://source.android.com/docs/security/bulletin/2023-09-01 * tag 'ASB-2023-09-05_4.19-stable' of https://android.googlesource.com/kernel/common: Linux 4.19.294 Revert "ARM: ep93xx: fix missing-prototype warnings" Revert "MIPS: Alchemy: fix dbdma2" Linux 4.19.293 dma-buf/sw_sync: Avoid recursive lock during fence signal clk: Fix undefined reference to `clk_rate_exclusive_{get,put}' scsi: core: raid_class: Remove raid_component_add() scsi: snic: Fix double free in snic_tgt_create() irqchip/mips-gic: Don't touch vl_map if a local interrupt is not routable rtnetlink: Reject negative ifindexes in RTM_NEWLINK netfilter: nf_queue: fix socket leak sched/rt: pick_next_rt_entity(): check list_entry mmc: block: Fix in_flight[issue_type] value error x86/fpu: Set X86_FEATURE_OSXSAVE feature after enabling OSXSAVE in CR4 PCI: acpiphp: Use pci_assign_unassigned_bridge_resources() only for non-root bus media: vcodec: Fix potential array out-of-bounds in encoder queue_setup lib/clz_ctz.c: Fix __clzdi2() and __ctzdi2() for 32-bit kernels batman-adv: Fix batadv_v_ogm_aggr_send memory leak batman-adv: Fix TT global entry leak when client roamed back batman-adv: Do not get eth header before batadv_check_management_packet batman-adv: Don't increase MTU when set by user batman-adv: Trigger events for auto adjusted MTU nfsd: Fix race to FREE_STATEID and cl_revoked ibmveth: Use dcbf rather than dcbfl ipvs: fix racy memcpy in proc_do_sync_threshold ipvs: Improve robustness to the ipvs sysctl bonding: fix macvlan over alb bond support net: remove bond_slave_has_mac_rcu() net/sched: fix a qdisc modification with ambiguous command request igb: Avoid starting unnecessary workqueues dccp: annotate data-races in dccp_poll() sock: annotate data-races around prot->memory_pressure tracing: Fix memleak due to race between current_tracer and trace drm/amd/display: check TG is non-null before checking if enabled drm/amd/display: do not wait for mpc idle if tg is disabled regmap: Account for register length in SMBus I/O limits dm integrity: reduce vmalloc space footprint on 32-bit architectures dm integrity: increase RECALC_SECTORS to improve recalculate speed powerpc: Fail build if using recordmcount with binutils v2.37 powerpc: remove leftover code of old GCC version checks powerpc/32: add stack protector support fbdev: fix potential OOB read in fast_imageblit() fbdev: Fix sys_imageblit() for arbitrary image widths fbdev: Improve performance of sys_imageblit() tty: serial: fsl_lpuart: add earlycon for imx8ulp platform Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP" MIPS: cpu-features: Use boot_cpu_type for CPU type based features MIPS: cpu-features: Enable octeon_cache by cpu_type fs: dlm: fix mismatch of plock results from userspace fs: dlm: use dlm_plock_info for do_unlock_close fs: dlm: change plock interrupted message to debug again fs: dlm: add pid to debug log dlm: replace usage of found with dedicated list iterator variable dlm: improve plock logging if interrupted PCI: acpiphp: Reassign resources on bridge if necessary net: phy: broadcom: stub c45 read/write for 54810 net: xfrm: Amend XFRMA_SEC_CTX nla_policy structure net: fix the RTO timer retransmitting skb every 1ms if linear option is enabled virtio-net: set queues after driver_ok af_unix: Fix null-ptr-deref in unix_stream_sendpage(). netfilter: set default timeout to 3 secs for sctp shutdown send and recv state test_firmware: prevent race conditions by a correct implementation of locking mmc: wbsd: fix double mmc_free_host() in wbsd_init() cifs: Release folio lock on fscache read hit. ALSA: usb-audio: Add support for Mythware XA001AU capture and playback interfaces. serial: 8250: Fix oops for port->pm on uart_change_pm() ASoC: meson: axg-tdm-formatter: fix channel slot allocation ASoC: rt5665: add missed regulator_bulk_disable net: do not allow gso_size to be set to GSO_BY_FRAGS sock: Fix misuse of sk_under_memory_pressure() i40e: fix misleading debug logs team: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves netfilter: nft_dynset: disallow object maps selftests: mirror_gre_changes: Tighten up the TTL test match xfrm: add NULL check in xfrm_update_ae_params ip_vti: fix potential slab-use-after-free in decode_session6 ip6_vti: fix slab-use-after-free in decode_session6 xfrm: fix slab-use-after-free in decode_session6 xfrm: interface: rename xfrm_interface.c to xfrm_interface_core.c net: af_key: fix sadb_x_filter validation net: xfrm: Fix xfrm_address_filter OOB read btrfs: fix BUG_ON condition in btrfs_cancel_balance powerpc/rtas_flash: allow user copy to flash block cache objects fbdev: mmp: fix value check in mmphw_probe() virtio-mmio: don't break lifecycle of vm_dev virtio-mmio: Use to_virtio_mmio_device() to simply code virtio-mmio: convert to devm_platform_ioremap_resource nfsd: Remove incorrect check in nfsd4_validate_stateid nfsd4: kill warnings on testing stateids with mismatched clientids block: fix signed int overflow in Amiga partition support mmc: sunxi: fix deferred probing mmc: bcm2835: fix deferred probing mmc: Remove dev_err() usage after platform_get_irq() mmc: tmio: move tmio_mmc_set_clock() to platform hook mmc: tmio: replace tmio_mmc_clk_stop() calls with tmio_mmc_set_clock() mmc: meson-gx: remove redundant mmc_request_done() call from irq context mmc: meson-gx: remove useless lock USB: dwc3: qcom: fix NULL-deref on suspend usb: dwc3: qcom: Add helper functions to enable,disable wake irqs irqchip/mips-gic: Use raw spinlock for gic_lock irqchip/mips-gic: Get rid of the reliance on irq_cpu_online() x86/topology: Fix erroneous smp_num_siblings on Intel Hybrid platforms powerpc/64s/radix: Fix soft dirty tracking powerpc: Move page table dump files in a dedicated subdirectory powerpc/mm: dump block address translation on book3s/32 powerpc/mm: dump segment registers on book3s/32 powerpc/mm: Move pgtable_t into platform headers powerpc/mm: move platform specific mmu-xxx.h in platform directories iio: addac: stx104: Fix race condition when converting analog-to-digital iio: addac: stx104: Fix race condition for stx104_write_raw() iio: adc: stx104: Implement and utilize register structures iio: adc: stx104: Utilize iomap interface iio: add addac subdirectory IMA: allow/fix UML builds drm/amdgpu: Fix potential fence use-after-free v2 Bluetooth: L2CAP: Fix use-after-free pcmcia: rsrc_nonstatic: Fix memory leak in nonstatic_release_resource_db() gfs2: Fix possible data races in gfs2_show_options() media: platform: mediatek: vpu: fix NULL ptr dereference media: v4l2-mem2mem: add lock to protect parameter num_rdy FS: JFS: Check for read-only mounted filesystem in txBegin FS: JFS: Fix null-ptr-deref Read in txBegin MIPS: dec: prom: Address -Warray-bounds warning fs: jfs: Fix UBSAN: array-index-out-of-bounds in dbAllocDmapLev udf: Fix uninitialized array access for some pathnames HID: add quirk for 03f0:464a HP Elite Presenter Mouse quota: fix warning in dqgrab() quota: Properly disable quotas when add_dquot_ref() fails ALSA: emu10k1: roll up loops in DSP setup code for Audigy drm/radeon: Fix integer overflow in radeon_cs_parser_init selftests: forwarding: tc_flower: Relax success criterion lib/mpi: Eliminate unused umul_ppmm definitions for MIPS Revert "posix-timers: Ensure timer ID search-loop limit is valid" UPSTREAM: media: usb: siano: Fix warning due to null work_func_t function pointer UPSTREAM: Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb UPSTREAM: net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free UPSTREAM: net/sched: cls_u32: No longer copy tcf_result on update to avoid use-after-free Linux 4.19.292 sch_netem: fix issues in netem_change() vs get_dist_table() alpha: remove __init annotation from exported page_is_ram() scsi: core: Fix possible memory leak if device_add() fails scsi: snic: Fix possible memory leak if device_add() fails scsi: 53c700: Check that command slot is not NULL scsi: storvsc: Fix handling of virtual Fibre Channel timeouts scsi: core: Fix legacy /proc parsing buffer overflow netfilter: nf_tables: report use refcount overflow netfilter: nf_tables: bogus EBUSY when deleting flowtable after flush btrfs: don't stop integrity writeback too early ibmvnic: Handle DMA unmapping of login buffs in release functions wifi: cfg80211: fix sband iftype data lookup for AP_VLAN IB/hfi1: Fix possible panic during hotplug remove drivers: net: prevent tun_build_skb() to exceed the packet size limit dccp: fix data-race around dp->dccps_mss_cache bonding: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves net/packet: annotate data-races around tp->status mISDN: Update parameter type of dsp_cmx_send() drm/nouveau/disp: Revert a NULL check inside nouveau_connector_get_modes x86: Move gds_ucode_mitigated() declaration to header x86/mm: Fix VDSO and VVAR placement on 5-level paging machines x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405 usb: dwc3: Properly handle processing of pending events usb-storage: alauda: Fix uninit-value in alauda_check_media() binder: fix memory leak in binder_init() iio: cros_ec: Fix the allocation size for cros_ec_command nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput radix tree test suite: fix incorrect allocation size for pthreads drm/nouveau/gr: enable memory loads on helper invocation on all channels dmaengine: pl330: Return DMA_PAUSED when transaction is paused ipv6: adjust ndisc_is_useropt() to also return true for PIO mmc: moxart: read scr register without changing byte order sparc: fix up arch_cpu_finalize_init() build breakage. UPSTREAM: net/sched: cls_fw: Fix improper refcount update leads to use-after-free Linux 4.19.291 drm/edid: fix objtool warning in drm_cvt_modes() arm64: dts: stratix10: fix incorrect I2C property for SCL signal drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions ARM: dts: nxp/imx6sll: fix wrong property name in usbphy node ARM: dts: imx6sll: fixup of operating points ARM: dts: imx: add usb alias ARM: dts: imx6sll: Make ssi node name same as other platforms PM: sleep: wakeirq: fix wake irq arming PM / wakeirq: support enabling wake-up irq after runtime_suspend called powerpc/mm/altmap: Fix altmap boundary check mtd: rawnand: omap_elm: Fix incorrect type in assignment test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation test_firmware: fix a memory leak with reqs buffer ext2: Drop fragment support net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb fs/sysv: Null check to prevent null-ptr-deref bug USB: zaurus: Add ID for A-300/B-500/C-700 libceph: fix potential hang in ceph_osdc_notify() scsi: zfcp: Defer fc_rport blocking until after ADISC response tcp_metrics: fix data-race in tcpm_suck_dst() vs fastopen tcp_metrics: annotate data-races around tm->tcpm_net tcp_metrics: annotate data-races around tm->tcpm_vals[] tcp_metrics: annotate data-races around tm->tcpm_lock tcp_metrics: annotate data-races around tm->tcpm_stamp tcp_metrics: fix addr_same() helper ip6mr: Fix skb_under_panic in ip6mr_cache_report() net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free net/sched: cls_u32: No longer copy tcf_result on update to avoid use-after-free net: add missing data-race annotation for sk_ll_usec net: add missing data-race annotations around sk->sk_peek_off net: sched: cls_u32: Fix match key mis-addressing perf test uprobe_from_different_cu: Skip if there is no gcc net/mlx5e: fix return value check in mlx5e_ipsec_remove_trailer() KVM: s390: fix sthyi error handling word-at-a-time: use the same return type for has_zero regardless of endianness loop: Select I/O scheduler 'none' from inside add_disk() perf: Fix function pointer case net/sched: cls_u32: Fix reference counter leak leading to overflow ASoC: cs42l51: fix driver to properly autoload with automatic module loading net/sched: sch_qfq: account for stab overhead in qfq_enqueue net/sched: cls_fw: Fix improper refcount update leads to use-after-free drm/client: Fix memory leak in drm_client_target_cloned dm cache policy smq: ensure IO doesn't prevent cleaner policy progress ASoC: wm8904: Fill the cache for WM8904_ADC_TEST_0 register s390/dasd: fix hanging device after quiesce/resume virtio-net: fix race between set queues and probe serial: 8250_dw: Preserve original value of DLF register serial: 8250_dw: split Synopsys DesignWare 8250 common functions irq-bcm6345-l1: Do not assume a fixed block to cpu mapping tpm_tis: Explicitly check for error code btrfs: check for commit error at btrfs_attach_transaction_barrier() hwmon: (nct7802) Fix for temp6 (PECI1) processed even if PECI1 disabled staging: ks7010: potential buffer overflow in ks_wlan_set_encode_ext() Documentation: security-bugs.rst: clarify CVE handling Documentation: security-bugs.rst: update preferences when dealing with the linux-distros group usb: xhci-mtk: set the dma max_seg_size USB: quirks: add quirk for Focusrite Scarlett usb: ohci-at91: Fix the unhandle interrupt when resume usb: dwc3: don't reset device side if dwc3 was configured as host-only usb: dwc3: pci: skip BYT GPIO lookup table for hardwired phy Revert "usb: dwc3: core: Enable AutoRetry feature in the controller" can: gs_usb: gs_can_close(): add missing set of CAN state to CAN_STATE_STOPPED USB: serial: simple: sort driver entries USB: serial: simple: add Kaufmann RKS+CAN VCP USB: serial: option: add Quectel EC200A module support USB: serial: option: support Quectel EM060K_128 tracing: Fix warning in trace_buffered_event_disable() ring-buffer: Fix wrong stat of cpu_buffer->read ata: pata_ns87415: mark ns87560_tf_read static dm raid: fix missing reconfig_mutex unlock in raid_ctr() error paths block: Fix a source code comment in include/uapi/linux/blkzoned.h ASoC: fsl_spdif: Silence output on stop drm/msm: Fix IS_ERR_OR_NULL() vs NULL check in a5xx_submit_in_rb() RDMA/mlx4: Make check for invalid flags stricter benet: fix return value check in be_lancer_xmit_workarounds() net/sched: mqprio: Add length check for TCA_MQPRIO_{MAX/MIN}_RATE64 net/sched: mqprio: add extack to mqprio_parse_nlattr() net/sched: mqprio: refactor nlattr parsing to a separate function platform/x86: msi-laptop: Fix rfkill out-of-sync on MSI Wind U100 team: reset team's flags when down link is P2P device bonding: reset bond's flags when down link is P2P device tcp: Reduce chance of collisions in inet6_hashfn(). ipv6 addrconf: fix bug where deleting a mngtmpaddr can create a new temporary address ethernet: atheros: fix return value check in atl1e_tso_csum() phy: hisilicon: Fix an out of bounds check in hisi_inno_phy_probe() i40e: Fix an NULL vs IS_ERR() bug for debugfs_create_dir() ext4: fix to check return value of freeze_bdev() in ext4_shutdown() scsi: qla2xxx: Array index may go out of bound scsi: qla2xxx: Fix inconsistent format argument type in qla_os.c ftrace: Fix possible warning on checking all pages used in ftrace_process_locs() ftrace: Store the order of pages allocated in ftrace_page ftrace: Check if pages were allocated before calling free_pages() ftrace: Add information on number of page groups allocated fs: dlm: interrupt posix locks only when process is killed dlm: rearrange async condition return dlm: cleanup plock_op vs plock_xop PCI/ASPM: Avoid link retraining race PCI/ASPM: Factor out pcie_wait_for_retrain() PCI/ASPM: Return 0 or -ETIMEDOUT from pcie_retrain_link() PCI: Rework pcie_retrain_link() wait loop ext4: Fix reusing stale buffer heads from last failed mounting ext4: rename journal_dev to s_journal_dev inside ext4_sb_info btrfs: fix extent buffer leak after tree mod log failure at split_node() bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent bcache: remove 'int n' from parameter list of bch_bucket_alloc_set() bcache: use MAX_CACHES_PER_SET instead of magic number 8 in __bch_bucket_alloc_set gpio: tps68470: Make tps68470_gpio_output() always set the initial value tracing/histograms: Return an error if we fail to add histogram to hist_vars list tcp: annotate data-races around fastopenq.max_qlen tcp: annotate data-races around tp->notsent_lowat tcp: annotate data-races around rskq_defer_accept tcp: annotate data-races around tp->linger2 net: Replace the limit of TCP_LINGER2 with TCP_FIN_TIMEOUT_MAX netfilter: nf_tables: can't schedule in nft_chain_validate netfilter: nf_tables: fix spurious set element insertion failure llc: Don't drop packet from non-root netns. fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe Revert "tcp: avoid the lookup process failing to get sk in ehash table" net:ipv6: check return value of pskb_trim() net: ethernet: ti: cpsw_ale: Fix cpsw_ale_get_field()/cpsw_ale_set_field() pinctrl: amd: Use amd_pinconf_set() for all config options fbdev: imxfb: warn about invalid left/right margin spi: bcm63xx: fix max prepend length igb: Fix igb_down hung on surprise removal wifi: iwlwifi: mvm: avoid baid size integer overflow wifi: wext-core: Fix -Wstringop-overflow warning in ioctl_standard_iw_point() bpf: Address KCSAN report on bpf_lru_list sched/fair: Don't balance task to its current running CPU posix-timers: Ensure timer ID search-loop limit is valid md/raid10: prevent soft lockup while flush writes md: fix data corruption for raid456 when reshape restart while grow up nbd: Add the maximum limit of allocated index in nbd_dev_add debugobjects: Recheck debug_objects_enabled before reporting ext4: correct inline offset when handling xattrs in inode body can: bcm: Fix UAF in bcm_proc_show() fuse: revalidate: don't invalidate if interrupted perf probe: Add test for regression introduced by switch to die_get_decl_file() tracing/histograms: Add histograms to hist_vars if they have referenced variables drm/atomic: Fix potential use-after-free in nonblocking commits scsi: qla2xxx: Pointer may be dereferenced scsi: qla2xxx: Check valid rport returned by fc_bsg_to_rport() scsi: qla2xxx: Fix potential NULL pointer dereference scsi: qla2xxx: Wait for io return on terminate rport xtensa: ISS: fix call to split_if_spec ring-buffer: Fix deadloop issue on reading trace_pipe tty: serial: samsung_tty: Fix a memory leak in s3c24xx_serial_getclk() when iterating clk tty: serial: samsung_tty: Fix a memory leak in s3c24xx_serial_getclk() in case of error Revert "8250: add support for ASIX devices with a FIFO bug" meson saradc: fix clock divider mask length ceph: don't let check_caps skip sending responses for revoke msgs hwrng: imx-rngc - fix the timeout for init and self check serial: atmel: don't enable IRQs prematurely fs: dlm: return positive pid value for F_GETLK md/raid0: add discard support for the 'original' layout misc: pci_endpoint_test: Re-init completion for every test misc: pci_endpoint_test: Free IRQs before removing the device PCI: rockchip: Use u32 variable to access 32-bit registers PCI: rockchip: Fix legacy IRQ generation for RK3399 PCIe endpoint core PCI: rockchip: Add poll and timeout to wait for PHY PLLs to be locked PCI: rockchip: Write PCI Device ID to correct register PCI: rockchip: Assert PCI Configuration Enable bit after probe PCI: qcom: Disable write access to read only registers for IP v2.3.3 PCI: Add function 1 DMA alias quirk for Marvell 88SE9235 PCI/PM: Avoid putting EloPOS E2/S2/H2 PCIe Ports in D3cold jfs: jfs_dmap: Validate db_l2nbperpage while mounting ext4: only update i_reserved_data_blocks on successful block allocation ext4: fix wrong unit use in ext4_mb_clear_bb perf intel-pt: Fix CYC timestamps after standalone CBR SUNRPC: Fix UAF in svc_tcp_listen_data_ready() net: bcmgenet: Ensure MDIO unregistration has clocks enabled tpm: tpm_vtpm_proxy: fix a race condition in /dev/vtpmx creation pinctrl: amd: Only use special debounce behavior for GPIO 0 pinctrl: amd: Detect internal GPIO0 debounce handling pinctrl: amd: Fix mistake in handling clearing pins at startup net/sched: make psched_mtu() RTNL-less safe wifi: airo: avoid uninitialized warning in airo_get_rate() ipv6/addrconf: fix a potential refcount underflow for idev NTB: ntb_tool: Add check for devm_kcalloc NTB: ntb_transport: fix possible memory leak while device_register() fails ntb: intel: Fix error handling in intel_ntb_pci_driver_init() NTB: amd: Fix error handling in amd_ntb_pci_driver_init() ntb: idt: Fix error handling in idt_pci_driver_init() udp6: fix udp6_ehashfn() typo icmp6: Fix null-ptr-deref of ip6_null_entry->rt6i_idev in icmp6_dev(). vrf: Increment Icmp6InMsgs on the original netdev net: mvneta: fix txq_map in case of txq_number==1 workqueue: clean up WORK_* constant types, clarify masking net: lan743x: Don't sleep in atomic context netfilter: nf_tables: prevent OOB access in nft_byteorder_eval netfilter: conntrack: Avoid nf_ct_helper_hash uses after free netfilter: nf_tables: fix scheduling-while-atomic splat netfilter: nf_tables: unbind non-anonymous set if rule construction fails netfilter: nf_tables: reject unbound anonymous set before commit phase netfilter: nf_tables: add NFT_TRANS_PREPARE_ERROR to deal with bound set/chain netfilter: nf_tables: incorrect error path handling with NFT_MSG_NEWRULE netfilter: nf_tables: use net_generic infra for transaction data netfilter: add helper function to set up the nfnetlink header and use it netfilter: nftables: add helper function to set the base sequence number netfilter: nf_tables: add rescheduling points during loop detection walks netfilter: nf_tables: fix nat hook table deletion spi: spi-fsl-spi: allow changing bits_per_word while CS is still active spi: spi-fsl-spi: relax message sanity checking a little spi: spi-fsl-spi: remove always-true conditional in fsl_spi_do_one_msg ARM: orion5x: fix d2net gpio initialization btrfs: fix race when deleting quota root from the dirty cow roots list jffs2: reduce stack usage in jffs2_build_xattr_subsystem() integrity: Fix possible multiple allocation in integrity_inode_get() bcache: Remove unnecessary NULL point check in node allocations mmc: core: disable TRIM on Micron MTFC4GACAJCN-1M mmc: core: disable TRIM on Kingston EMMC04G-M627 NFSD: add encoding of op_recall flag for write delegation ALSA: jack: Fix mutex call in snd_jack_report() i2c: xiic: Don't try to handle more interrupt events after error i2c: xiic: Defer xiic_wakeup() and __xiic_start_xfer() in xiic_process() sh: dma: Fix DMA channel offset calculation net/sched: act_pedit: Add size check for TCA_PEDIT_PARMS_EX tcp: annotate data races in __tcp_oow_rate_limited() net: bridge: keep ports without IFF_UNICAST_FLT in BR_PROMISC mode powerpc: allow PPC_EARLY_DEBUG_CPM only when SERIAL_CPM=y f2fs: fix error path handling in truncate_dnode() mailbox: ti-msgmgr: Fill non-message tx data fields with 0x0 spi: bcm-qspi: return error if neither hif_mspi nor mspi is available Add MODULE_FIRMWARE() for FIRMWARE_TG357766. sctp: fix potential deadlock on &net->sctp.addr_wq_lock rtc: st-lpc: Release some resources in st_rtc_probe() in case of error mfd: stmpe: Only disable the regulators if they are enabled mfd: intel-lpss: Add missing check for platform_get_resource KVM: s390: fix KVM_S390_GET_CMMA_BITS for GFNs in memslot holes mfd: rt5033: Drop rt5033-battery sub-device usb: phy: phy-tahvo: fix memory leak in tahvo_usb_probe() extcon: Fix kernel doc of property capability fields to avoid warnings extcon: Fix kernel doc of property fields to avoid warnings media: usb: siano: Fix warning due to null work_func_t function pointer media: videodev2.h: Fix struct v4l2_input tuner index comment media: usb: Check az6007_read() return value sh: j2: Use ioremap() to translate device tree address into kernel memory w1: fix loop in w1_fini() block: change all __u32 annotations to __be32 in affs_hardblocks.h USB: serial: option: add LARA-R6 01B PIDs ARC: define ASM_NL and __ALIGN(_STR) outside #ifdef __ASSEMBLY__ guard ARCv2: entry: rewrite to enable use of double load/stores LDD/STD ARCv2: entry: avoid a branch ARCv2: entry: push out the Z flag unclobber from common EXCEPTION_PROLOGUE ARCv2: entry: comments about hardware auto-save on taken interrupts modpost: fix section mismatch message for R_ARM_{PC24,CALL,JUMP24} modpost: fix section mismatch message for R_ARM_ABS32 crypto: nx - fix build warnings when DEBUG_FS is not enabled hwrng: virtio - Fix race on data_avail and actual data hwrng: virtio - always add a pending request hwrng: virtio - don't waste entropy hwrng: virtio - don't wait on cleanup hwrng: virtio - add an internal buffer pinctrl: at91-pio4: check return value of devm_kasprintf() perf dwarf-aux: Fix off-by-one in die_get_varname() pinctrl: cherryview: Return correct value if pin in push-pull mode PCI: Add pci_clear_master() stub for non-CONFIG_PCI scsi: 3w-xxxx: Add error handling for initialization failure in tw_probe() ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer drm/radeon: fix possible division-by-zero errors fbdev: omapfb: lcd_mipid: Fix an error handling path in mipid_spi_probe() arm64: dts: renesas: ulcb-kf: Remove flow control for SCIF1 IB/hfi1: Fix sdma.h tx->num_descs off-by-one errors soc/fsl/qe: fix usb.c build errors ASoC: es8316: Increment max value for ALC Capture Target Volume control ARM: ep93xx: fix missing-prototype warnings drm/panel: simple: fix active size for Ampire AM-480272H3TMQW-T01H Input: adxl34x - do not hardcode interrupt trigger type ARM: dts: BCM5301X: Drop "clock-names" from the SPI node Input: drv260x - sleep between polling GO bit radeon: avoid double free in ci_dpm_init() netlink: Add __sock_i_ino() for __netlink_diag_dump(). ipvlan: Fix return value of ipvlan_queue_xmit() netfilter: nf_conntrack_sip: fix the ct_sip_parse_numerical_param() return value. lib/ts_bm: reset initial match offset for every block of text gtp: Fix use-after-free in __gtp_encap_destroy(). netlink: do not hard code device address lenth in fdb dumps netlink: fix potential deadlock in netlink_set_err() wifi: ath9k: convert msecs to jiffies where needed wifi: ath9k: Fix possible stall on ath9k_txq_list_has_key() memstick r592: make memstick_debug_get_tpc_name() static kexec: fix a memory leak in crash_shrink_memory() watchdog/perf: more properly prevent false positives with turbo modes watchdog/perf: define dummy watchdog_update_hrtimer_threshold() on correct config wifi: rsi: Do not set MMC_PM_KEEP_POWER in shutdown wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes wifi: ray_cs: Fix an error handling path in ray_probe() wifi: ray_cs: Drop useless status variable in parse_addr() wifi: ray_cs: Utilize strnlen() in parse_addr() wifi: wl3501_cs: Fix an error handling path in wl3501_probe() wl3501_cs: use eth_hw_addr_set() net: create netdev->dev_addr assignment helpers wl3501_cs: Fix misspelling and provide missing documentation wl3501_cs: Remove unnecessary NULL check wl3501_cs: Fix a bunch of formatting issues related to function docs wifi: atmel: Fix an error handling path in atmel_probe() wifi: orinoco: Fix an error handling path in orinoco_cs_probe() wifi: orinoco: Fix an error handling path in spectrum_cs_probe() nfc: llcp: fix possible use of uninitialized variable in nfc_llcp_send_connect() nfc: constify several pointers to u8, char and sk_buff wifi: mwifiex: Fix the size of a memory allocation in mwifiex_ret_802_11_scan() samples/bpf: Fix buffer overflow in tcp_basertt wifi: ath9k: avoid referencing uninit memory in ath9k_wmi_ctrl_rx wifi: ath9k: fix AR9003 mac hardware hang check register offset calculation evm: Complete description of evm_inode_setattr() ARM: 9303/1: kprobes: avoid missing-declaration warnings PM: domains: fix integer overflow issues in genpd_parse_state() clocksource/drivers/cadence-ttc: Fix memory leak in ttc_timer_probe clocksource/drivers/cadence-ttc: Use ttc driver as platform driver clocksource/drivers: Unify the names to timer-* format irqchip/jcore-aic: Fix missing allocation of IRQ descriptors irqchip/jcore-aic: Kill use of irq_create_strict_mappings() md/raid10: fix io loss while replacement replace rdev md/raid10: fix wrong setting of max_corr_read_errors md/raid10: fix overflow of md/safe_mode_delay md/raid10: check slab-out-of-bounds in md_bitmap_get_counter treewide: Remove uninitialized_var() usage drm/amdgpu: Validate VM ioctl flags. scripts/tags.sh: Resolve gtags empty index generation drm/edid: Fix uninitialized variable in drm_cvt_modes() fbdev: imsttfb: Fix use after free bug in imsttfb_probe video: imsttfb: check for ioremap() failures x86/smp: Use dedicated cache-line for mwait_play_dead() gfs2: Don't deref jdesc in evict Linux 4.19.290 x86: fix backwards merge of GDS/SRSO bit xen/netback: Fix buffer overrun triggered by unusual packet Documentation/x86: Fix backwards on/off logic about YMM support x86/xen: Fix secondary processors' FPU initialization KVM: Add GDS_NO support to KVM x86/speculation: Add Kconfig option for GDS x86/speculation: Add force option to GDS mitigation x86/speculation: Add Gather Data Sampling mitigation x86/fpu: Move FPU initialization into arch_cpu_finalize_init() x86/fpu: Mark init functions __init x86/fpu: Remove cpuinfo argument from init functions init, x86: Move mem_encrypt_init() into arch_cpu_finalize_init() init: Invoke arch_cpu_finalize_init() earlier init: Remove check_bugs() leftovers um/cpu: Switch to arch_cpu_finalize_init() sparc/cpu: Switch to arch_cpu_finalize_init() sh/cpu: Switch to arch_cpu_finalize_init() mips/cpu: Switch to arch_cpu_finalize_init() m68k/cpu: Switch to arch_cpu_finalize_init() ia64/cpu: Switch to arch_cpu_finalize_init() ARM: cpu: Switch to arch_cpu_finalize_init() x86/cpu: Switch to arch_cpu_finalize_init() init: Provide arch_cpu_finalize_init() Conflicts: drivers/mmc/core/block.c drivers/mmc/host/sdhci-msm.c drivers/usb/dwc3/core.c drivers/usb/dwc3/gadget.c Change-Id: Id2f4d5c8067f8e5eda39c0eaa5e59d54a394b4c7
1954 lines
60 KiB
C
1954 lines
60 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#ifndef _LINUX_KERNEL_TRACE_H
|
|
#define _LINUX_KERNEL_TRACE_H
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/ring_buffer.h>
|
|
#include <linux/mmiotrace.h>
|
|
#include <linux/tracepoint.h>
|
|
#include <linux/ftrace.h>
|
|
#include <linux/hw_breakpoint.h>
|
|
#include <linux/trace_seq.h>
|
|
#include <linux/trace_events.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/trace_seq.h>
|
|
#include <linux/glob.h>
|
|
|
|
#ifdef CONFIG_FTRACE_SYSCALLS
|
|
#include <asm/unistd.h> /* For NR_SYSCALLS */
|
|
#include <asm/syscall.h> /* some archs define it here */
|
|
#endif
|
|
|
|
enum trace_type {
|
|
__TRACE_FIRST_TYPE = 0,
|
|
|
|
TRACE_FN,
|
|
TRACE_CTX,
|
|
TRACE_WAKE,
|
|
TRACE_STACK,
|
|
TRACE_PRINT,
|
|
TRACE_BPRINT,
|
|
TRACE_MMIO_RW,
|
|
TRACE_MMIO_MAP,
|
|
TRACE_BRANCH,
|
|
TRACE_GRAPH_RET,
|
|
TRACE_GRAPH_ENT,
|
|
TRACE_USER_STACK,
|
|
TRACE_BLK,
|
|
TRACE_BPUTS,
|
|
TRACE_HWLAT,
|
|
TRACE_RAW_DATA,
|
|
|
|
__TRACE_LAST_TYPE,
|
|
};
|
|
|
|
|
|
#undef __field
|
|
#define __field(type, item) type item;
|
|
|
|
#undef __field_struct
|
|
#define __field_struct(type, item) __field(type, item)
|
|
|
|
#undef __field_desc
|
|
#define __field_desc(type, container, item)
|
|
|
|
#undef __array
|
|
#define __array(type, item, size) type item[size];
|
|
|
|
#undef __array_desc
|
|
#define __array_desc(type, container, item, size)
|
|
|
|
#undef __dynamic_array
|
|
#define __dynamic_array(type, item) type item[];
|
|
|
|
#undef F_STRUCT
|
|
#define F_STRUCT(args...) args
|
|
|
|
#undef FTRACE_ENTRY
|
|
#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
|
|
struct struct_name { \
|
|
struct trace_entry ent; \
|
|
tstruct \
|
|
}
|
|
|
|
#undef FTRACE_ENTRY_DUP
|
|
#define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk, filter)
|
|
|
|
#undef FTRACE_ENTRY_REG
|
|
#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \
|
|
filter, regfn) \
|
|
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
|
|
filter)
|
|
|
|
#undef FTRACE_ENTRY_PACKED
|
|
#define FTRACE_ENTRY_PACKED(name, struct_name, id, tstruct, print, \
|
|
filter) \
|
|
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
|
|
filter) __packed
|
|
|
|
#include "trace_entries.h"
|
|
|
|
/*
|
|
* syscalls are special, and need special handling, this is why
|
|
* they are not included in trace_entries.h
|
|
*/
|
|
struct syscall_trace_enter {
|
|
struct trace_entry ent;
|
|
int nr;
|
|
unsigned long args[];
|
|
};
|
|
|
|
struct syscall_trace_exit {
|
|
struct trace_entry ent;
|
|
int nr;
|
|
long ret;
|
|
};
|
|
|
|
struct kprobe_trace_entry_head {
|
|
struct trace_entry ent;
|
|
unsigned long ip;
|
|
};
|
|
|
|
struct kretprobe_trace_entry_head {
|
|
struct trace_entry ent;
|
|
unsigned long func;
|
|
unsigned long ret_ip;
|
|
};
|
|
|
|
/*
|
|
* trace_flag_type is an enumeration that holds different
|
|
* states when a trace occurs. These are:
|
|
* IRQS_OFF - interrupts were disabled
|
|
* IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
|
|
* NEED_RESCHED - reschedule is requested
|
|
* HARDIRQ - inside an interrupt handler
|
|
* SOFTIRQ - inside a softirq handler
|
|
*/
|
|
enum trace_flag_type {
|
|
TRACE_FLAG_IRQS_OFF = 0x01,
|
|
TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
|
|
TRACE_FLAG_NEED_RESCHED = 0x04,
|
|
TRACE_FLAG_HARDIRQ = 0x08,
|
|
TRACE_FLAG_SOFTIRQ = 0x10,
|
|
TRACE_FLAG_PREEMPT_RESCHED = 0x20,
|
|
TRACE_FLAG_NMI = 0x40,
|
|
};
|
|
|
|
#define TRACE_BUF_SIZE 1024
|
|
|
|
struct trace_array;
|
|
|
|
/*
|
|
* The CPU trace array - it consists of thousands of trace entries
|
|
* plus some other descriptor data: (for example which task started
|
|
* the trace, etc.)
|
|
*/
|
|
struct trace_array_cpu {
|
|
atomic_t disabled;
|
|
void *buffer_page; /* ring buffer spare */
|
|
|
|
unsigned long entries;
|
|
unsigned long saved_latency;
|
|
unsigned long critical_start;
|
|
unsigned long critical_end;
|
|
unsigned long critical_sequence;
|
|
unsigned long nice;
|
|
unsigned long policy;
|
|
unsigned long rt_priority;
|
|
unsigned long skipped_entries;
|
|
u64 preempt_timestamp;
|
|
pid_t pid;
|
|
kuid_t uid;
|
|
char comm[TASK_COMM_LEN];
|
|
|
|
bool ignore_pid;
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
bool ftrace_ignore_pid;
|
|
#endif
|
|
};
|
|
|
|
struct tracer;
|
|
struct trace_option_dentry;
|
|
|
|
struct trace_buffer {
|
|
struct trace_array *tr;
|
|
struct ring_buffer *buffer;
|
|
struct trace_array_cpu __percpu *data;
|
|
u64 time_start;
|
|
int cpu;
|
|
};
|
|
|
|
#define TRACE_FLAGS_MAX_SIZE 32
|
|
|
|
struct trace_options {
|
|
struct tracer *tracer;
|
|
struct trace_option_dentry *topts;
|
|
};
|
|
|
|
struct trace_pid_list {
|
|
int pid_max;
|
|
unsigned long *pids;
|
|
};
|
|
|
|
/*
|
|
* The trace array - an array of per-CPU trace arrays. This is the
|
|
* highest level data structure that individual tracers deal with.
|
|
* They have on/off state as well:
|
|
*/
|
|
struct trace_array {
|
|
struct list_head list;
|
|
char *name;
|
|
struct trace_buffer trace_buffer;
|
|
#ifdef CONFIG_TRACER_MAX_TRACE
|
|
/*
|
|
* The max_buffer is used to snapshot the trace when a maximum
|
|
* latency is reached, or when the user initiates a snapshot.
|
|
* Some tracers will use this to store a maximum trace while
|
|
* it continues examining live traces.
|
|
*
|
|
* The buffers for the max_buffer are set up the same as the trace_buffer
|
|
* When a snapshot is taken, the buffer of the max_buffer is swapped
|
|
* with the buffer of the trace_buffer and the buffers are reset for
|
|
* the trace_buffer so the tracing can continue.
|
|
*/
|
|
struct trace_buffer max_buffer;
|
|
bool allocated_snapshot;
|
|
#endif
|
|
#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER)
|
|
unsigned long max_latency;
|
|
#endif
|
|
struct trace_pid_list __rcu *filtered_pids;
|
|
/*
|
|
* max_lock is used to protect the swapping of buffers
|
|
* when taking a max snapshot. The buffers themselves are
|
|
* protected by per_cpu spinlocks. But the action of the swap
|
|
* needs its own lock.
|
|
*
|
|
* This is defined as a arch_spinlock_t in order to help
|
|
* with performance when lockdep debugging is enabled.
|
|
*
|
|
* It is also used in other places outside the update_max_tr
|
|
* so it needs to be defined outside of the
|
|
* CONFIG_TRACER_MAX_TRACE.
|
|
*/
|
|
arch_spinlock_t max_lock;
|
|
int buffer_disabled;
|
|
#ifdef CONFIG_FTRACE_SYSCALLS
|
|
int sys_refcount_enter;
|
|
int sys_refcount_exit;
|
|
struct trace_event_file __rcu *enter_syscall_files[NR_syscalls];
|
|
struct trace_event_file __rcu *exit_syscall_files[NR_syscalls];
|
|
#endif
|
|
int stop_count;
|
|
int clock_id;
|
|
int nr_topts;
|
|
bool clear_trace;
|
|
struct tracer *current_trace;
|
|
unsigned int trace_flags;
|
|
unsigned char trace_flags_index[TRACE_FLAGS_MAX_SIZE];
|
|
unsigned int flags;
|
|
raw_spinlock_t start_lock;
|
|
struct dentry *dir;
|
|
struct dentry *options;
|
|
struct dentry *percpu_dir;
|
|
struct dentry *event_dir;
|
|
struct trace_options *topts;
|
|
struct list_head systems;
|
|
struct list_head events;
|
|
struct trace_event_file *trace_marker_file;
|
|
cpumask_var_t tracing_cpumask; /* only trace on set CPUs */
|
|
int ref;
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
struct ftrace_ops *ops;
|
|
struct trace_pid_list __rcu *function_pids;
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
/* All of these are protected by the ftrace_lock */
|
|
struct list_head func_probes;
|
|
struct list_head mod_trace;
|
|
struct list_head mod_notrace;
|
|
#endif
|
|
/* function tracing enabled */
|
|
int function_enabled;
|
|
#endif
|
|
int time_stamp_abs_ref;
|
|
struct list_head hist_vars;
|
|
};
|
|
|
|
enum {
|
|
TRACE_ARRAY_FL_GLOBAL = (1 << 0)
|
|
};
|
|
|
|
extern struct list_head ftrace_trace_arrays;
|
|
|
|
extern struct mutex trace_types_lock;
|
|
|
|
extern int trace_array_get(struct trace_array *tr);
|
|
extern void trace_array_put(struct trace_array *tr);
|
|
|
|
extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs);
|
|
extern int tracing_set_clock(struct trace_array *tr, const char *clockstr);
|
|
|
|
extern bool trace_clock_in_ns(struct trace_array *tr);
|
|
|
|
/*
|
|
* The global tracer (top) should be the first trace array added,
|
|
* but we check the flag anyway.
|
|
*/
|
|
static inline struct trace_array *top_trace_array(void)
|
|
{
|
|
struct trace_array *tr;
|
|
|
|
if (list_empty(&ftrace_trace_arrays))
|
|
return NULL;
|
|
|
|
tr = list_entry(ftrace_trace_arrays.prev,
|
|
typeof(*tr), list);
|
|
WARN_ON(!(tr->flags & TRACE_ARRAY_FL_GLOBAL));
|
|
return tr;
|
|
}
|
|
|
|
#define FTRACE_CMP_TYPE(var, type) \
|
|
__builtin_types_compatible_p(typeof(var), type *)
|
|
|
|
#undef IF_ASSIGN
|
|
#define IF_ASSIGN(var, entry, etype, id) \
|
|
if (FTRACE_CMP_TYPE(var, etype)) { \
|
|
var = (typeof(var))(entry); \
|
|
WARN_ON(id && (entry)->type != id); \
|
|
break; \
|
|
}
|
|
|
|
/* Will cause compile errors if type is not found. */
|
|
extern void __ftrace_bad_type(void);
|
|
|
|
/*
|
|
* The trace_assign_type is a verifier that the entry type is
|
|
* the same as the type being assigned. To add new types simply
|
|
* add a line with the following format:
|
|
*
|
|
* IF_ASSIGN(var, ent, type, id);
|
|
*
|
|
* Where "type" is the trace type that includes the trace_entry
|
|
* as the "ent" item. And "id" is the trace identifier that is
|
|
* used in the trace_type enum.
|
|
*
|
|
* If the type can have more than one id, then use zero.
|
|
*/
|
|
#define trace_assign_type(var, ent) \
|
|
do { \
|
|
IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \
|
|
IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \
|
|
IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \
|
|
IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
|
|
IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \
|
|
IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
|
|
IF_ASSIGN(var, ent, struct bputs_entry, TRACE_BPUTS); \
|
|
IF_ASSIGN(var, ent, struct hwlat_entry, TRACE_HWLAT); \
|
|
IF_ASSIGN(var, ent, struct raw_data_entry, TRACE_RAW_DATA);\
|
|
IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
|
|
TRACE_MMIO_RW); \
|
|
IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
|
|
TRACE_MMIO_MAP); \
|
|
IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
|
|
IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
|
|
TRACE_GRAPH_ENT); \
|
|
IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
|
|
TRACE_GRAPH_RET); \
|
|
__ftrace_bad_type(); \
|
|
} while (0)
|
|
|
|
/*
|
|
* An option specific to a tracer. This is a boolean value.
|
|
* The bit is the bit index that sets its value on the
|
|
* flags value in struct tracer_flags.
|
|
*/
|
|
struct tracer_opt {
|
|
const char *name; /* Will appear on the trace_options file */
|
|
u32 bit; /* Mask assigned in val field in tracer_flags */
|
|
};
|
|
|
|
/*
|
|
* The set of specific options for a tracer. Your tracer
|
|
* have to set the initial value of the flags val.
|
|
*/
|
|
struct tracer_flags {
|
|
u32 val;
|
|
struct tracer_opt *opts;
|
|
struct tracer *trace;
|
|
};
|
|
|
|
/* Makes more easy to define a tracer opt */
|
|
#define TRACER_OPT(s, b) .name = #s, .bit = b
|
|
|
|
|
|
struct trace_option_dentry {
|
|
struct tracer_opt *opt;
|
|
struct tracer_flags *flags;
|
|
struct trace_array *tr;
|
|
struct dentry *entry;
|
|
};
|
|
|
|
/**
|
|
* struct tracer - a specific tracer and its callbacks to interact with tracefs
|
|
* @name: the name chosen to select it on the available_tracers file
|
|
* @init: called when one switches to this tracer (echo name > current_tracer)
|
|
* @reset: called when one switches to another tracer
|
|
* @start: called when tracing is unpaused (echo 1 > tracing_on)
|
|
* @stop: called when tracing is paused (echo 0 > tracing_on)
|
|
* @update_thresh: called when tracing_thresh is updated
|
|
* @open: called when the trace file is opened
|
|
* @pipe_open: called when the trace_pipe file is opened
|
|
* @close: called when the trace file is released
|
|
* @pipe_close: called when the trace_pipe file is released
|
|
* @read: override the default read callback on trace_pipe
|
|
* @splice_read: override the default splice_read callback on trace_pipe
|
|
* @selftest: selftest to run on boot (see trace_selftest.c)
|
|
* @print_headers: override the first lines that describe your columns
|
|
* @print_line: callback that prints a trace
|
|
* @set_flag: signals one of your private flags changed (trace_options file)
|
|
* @flags: your private flags
|
|
*/
|
|
struct tracer {
|
|
const char *name;
|
|
int (*init)(struct trace_array *tr);
|
|
void (*reset)(struct trace_array *tr);
|
|
void (*start)(struct trace_array *tr);
|
|
void (*stop)(struct trace_array *tr);
|
|
int (*update_thresh)(struct trace_array *tr);
|
|
void (*open)(struct trace_iterator *iter);
|
|
void (*pipe_open)(struct trace_iterator *iter);
|
|
void (*close)(struct trace_iterator *iter);
|
|
void (*pipe_close)(struct trace_iterator *iter);
|
|
ssize_t (*read)(struct trace_iterator *iter,
|
|
struct file *filp, char __user *ubuf,
|
|
size_t cnt, loff_t *ppos);
|
|
ssize_t (*splice_read)(struct trace_iterator *iter,
|
|
struct file *filp,
|
|
loff_t *ppos,
|
|
struct pipe_inode_info *pipe,
|
|
size_t len,
|
|
unsigned int flags);
|
|
#ifdef CONFIG_FTRACE_STARTUP_TEST
|
|
int (*selftest)(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
#endif
|
|
void (*print_header)(struct seq_file *m);
|
|
enum print_line_t (*print_line)(struct trace_iterator *iter);
|
|
/* If you handled the flag setting, return 0 */
|
|
int (*set_flag)(struct trace_array *tr,
|
|
u32 old_flags, u32 bit, int set);
|
|
/* Return 0 if OK with change, else return non-zero */
|
|
int (*flag_changed)(struct trace_array *tr,
|
|
u32 mask, int set);
|
|
struct tracer *next;
|
|
struct tracer_flags *flags;
|
|
int enabled;
|
|
int ref;
|
|
bool print_max;
|
|
bool allow_instances;
|
|
#ifdef CONFIG_TRACER_MAX_TRACE
|
|
bool use_max_tr;
|
|
#endif
|
|
/* True if tracer cannot be enabled in kernel param */
|
|
bool noboot;
|
|
};
|
|
|
|
|
|
/* Only current can touch trace_recursion */
|
|
|
|
/*
|
|
* For function tracing recursion:
|
|
* The order of these bits are important.
|
|
*
|
|
* When function tracing occurs, the following steps are made:
|
|
* If arch does not support a ftrace feature:
|
|
* call internal function (uses INTERNAL bits) which calls...
|
|
* The function callback, which can use the FTRACE bits to
|
|
* check for recursion.
|
|
*/
|
|
enum {
|
|
TRACE_BUFFER_BIT,
|
|
TRACE_BUFFER_NMI_BIT,
|
|
TRACE_BUFFER_IRQ_BIT,
|
|
TRACE_BUFFER_SIRQ_BIT,
|
|
|
|
/* Start of function recursion bits */
|
|
TRACE_FTRACE_BIT,
|
|
TRACE_FTRACE_NMI_BIT,
|
|
TRACE_FTRACE_IRQ_BIT,
|
|
TRACE_FTRACE_SIRQ_BIT,
|
|
TRACE_FTRACE_TRANSITION_BIT,
|
|
|
|
/* Internal use recursion bits */
|
|
TRACE_INTERNAL_BIT,
|
|
TRACE_INTERNAL_NMI_BIT,
|
|
TRACE_INTERNAL_IRQ_BIT,
|
|
TRACE_INTERNAL_SIRQ_BIT,
|
|
TRACE_INTERNAL_TRANSITION_BIT,
|
|
|
|
TRACE_BRANCH_BIT,
|
|
/*
|
|
* Abuse of the trace_recursion.
|
|
* As we need a way to maintain state if we are tracing the function
|
|
* graph in irq because we want to trace a particular function that
|
|
* was called in irq context but we have irq tracing off. Since this
|
|
* can only be modified by current, we can reuse trace_recursion.
|
|
*/
|
|
TRACE_IRQ_BIT,
|
|
|
|
/* Set if the function is in the set_graph_function file */
|
|
TRACE_GRAPH_BIT,
|
|
|
|
/*
|
|
* In the very unlikely case that an interrupt came in
|
|
* at a start of graph tracing, and we want to trace
|
|
* the function in that interrupt, the depth can be greater
|
|
* than zero, because of the preempted start of a previous
|
|
* trace. In an even more unlikely case, depth could be 2
|
|
* if a softirq interrupted the start of graph tracing,
|
|
* followed by an interrupt preempting a start of graph
|
|
* tracing in the softirq, and depth can even be 3
|
|
* if an NMI came in at the start of an interrupt function
|
|
* that preempted a softirq start of a function that
|
|
* preempted normal context!!!! Luckily, it can't be
|
|
* greater than 3, so the next two bits are a mask
|
|
* of what the depth is when we set TRACE_GRAPH_BIT
|
|
*/
|
|
|
|
TRACE_GRAPH_DEPTH_START_BIT,
|
|
TRACE_GRAPH_DEPTH_END_BIT,
|
|
};
|
|
|
|
#define trace_recursion_set(bit) do { (current)->trace_recursion |= (1<<(bit)); } while (0)
|
|
#define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(1<<(bit)); } while (0)
|
|
#define trace_recursion_test(bit) ((current)->trace_recursion & (1<<(bit)))
|
|
|
|
#define trace_recursion_depth() \
|
|
(((current)->trace_recursion >> TRACE_GRAPH_DEPTH_START_BIT) & 3)
|
|
#define trace_recursion_set_depth(depth) \
|
|
do { \
|
|
current->trace_recursion &= \
|
|
~(3 << TRACE_GRAPH_DEPTH_START_BIT); \
|
|
current->trace_recursion |= \
|
|
((depth) & 3) << TRACE_GRAPH_DEPTH_START_BIT; \
|
|
} while (0)
|
|
|
|
#define TRACE_CONTEXT_BITS 4
|
|
|
|
#define TRACE_FTRACE_START TRACE_FTRACE_BIT
|
|
|
|
#define TRACE_LIST_START TRACE_INTERNAL_BIT
|
|
|
|
#define TRACE_CONTEXT_MASK ((1 << (TRACE_LIST_START + TRACE_CONTEXT_BITS)) - 1)
|
|
|
|
enum {
|
|
TRACE_CTX_NMI,
|
|
TRACE_CTX_IRQ,
|
|
TRACE_CTX_SOFTIRQ,
|
|
TRACE_CTX_NORMAL,
|
|
TRACE_CTX_TRANSITION,
|
|
};
|
|
|
|
static __always_inline int trace_get_context_bit(void)
|
|
{
|
|
int bit;
|
|
|
|
if (in_interrupt()) {
|
|
if (in_nmi())
|
|
bit = TRACE_CTX_NMI;
|
|
|
|
else if (in_irq())
|
|
bit = TRACE_CTX_IRQ;
|
|
else
|
|
bit = TRACE_CTX_SOFTIRQ;
|
|
} else
|
|
bit = TRACE_CTX_NORMAL;
|
|
|
|
return bit;
|
|
}
|
|
|
|
static __always_inline int trace_test_and_set_recursion(int start)
|
|
{
|
|
unsigned int val = current->trace_recursion;
|
|
int bit;
|
|
|
|
bit = trace_get_context_bit() + start;
|
|
if (unlikely(val & (1 << bit))) {
|
|
/*
|
|
* It could be that preempt_count has not been updated during
|
|
* a switch between contexts. Allow for a single recursion.
|
|
*/
|
|
bit = start + TRACE_CTX_TRANSITION;
|
|
if (trace_recursion_test(bit))
|
|
return -1;
|
|
trace_recursion_set(bit);
|
|
barrier();
|
|
return bit;
|
|
}
|
|
|
|
val |= 1 << bit;
|
|
current->trace_recursion = val;
|
|
barrier();
|
|
|
|
return bit;
|
|
}
|
|
|
|
static __always_inline void trace_clear_recursion(int bit)
|
|
{
|
|
unsigned int val = current->trace_recursion;
|
|
|
|
bit = 1 << bit;
|
|
val &= ~bit;
|
|
|
|
barrier();
|
|
current->trace_recursion = val;
|
|
}
|
|
|
|
static inline struct ring_buffer_iter *
|
|
trace_buffer_iter(struct trace_iterator *iter, int cpu)
|
|
{
|
|
return iter->buffer_iter ? iter->buffer_iter[cpu] : NULL;
|
|
}
|
|
|
|
int tracer_init(struct tracer *t, struct trace_array *tr);
|
|
int tracing_is_enabled(void);
|
|
void tracing_reset(struct trace_buffer *buf, int cpu);
|
|
void tracing_reset_online_cpus(struct trace_buffer *buf);
|
|
void tracing_reset_current(int cpu);
|
|
void tracing_reset_all_online_cpus(void);
|
|
int tracing_open_generic(struct inode *inode, struct file *filp);
|
|
bool tracing_is_disabled(void);
|
|
bool tracer_tracing_is_on(struct trace_array *tr);
|
|
void tracer_tracing_on(struct trace_array *tr);
|
|
void tracer_tracing_off(struct trace_array *tr);
|
|
struct dentry *trace_create_file(const char *name,
|
|
umode_t mode,
|
|
struct dentry *parent,
|
|
void *data,
|
|
const struct file_operations *fops);
|
|
|
|
struct dentry *tracing_init_dentry(void);
|
|
|
|
struct ring_buffer_event;
|
|
|
|
struct ring_buffer_event *
|
|
trace_buffer_lock_reserve(struct ring_buffer *buffer,
|
|
int type,
|
|
unsigned long len,
|
|
unsigned long flags,
|
|
int pc);
|
|
|
|
struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
|
|
struct trace_array_cpu *data);
|
|
|
|
struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
|
|
int *ent_cpu, u64 *ent_ts);
|
|
|
|
void trace_buffer_unlock_commit_nostack(struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event);
|
|
|
|
int trace_empty(struct trace_iterator *iter);
|
|
|
|
void *trace_find_next_entry_inc(struct trace_iterator *iter);
|
|
|
|
void trace_init_global_iter(struct trace_iterator *iter);
|
|
|
|
void tracing_iter_reset(struct trace_iterator *iter, int cpu);
|
|
|
|
void trace_function(struct trace_array *tr,
|
|
unsigned long ip,
|
|
unsigned long parent_ip,
|
|
unsigned long flags, int pc);
|
|
void trace_graph_function(struct trace_array *tr,
|
|
unsigned long ip,
|
|
unsigned long parent_ip,
|
|
unsigned long flags, int pc);
|
|
void trace_latency_header(struct seq_file *m);
|
|
void trace_default_header(struct seq_file *m);
|
|
void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
|
|
int trace_empty(struct trace_iterator *iter);
|
|
|
|
void trace_graph_return(struct ftrace_graph_ret *trace);
|
|
int trace_graph_entry(struct ftrace_graph_ent *trace);
|
|
void set_graph_array(struct trace_array *tr);
|
|
|
|
void tracing_start_cmdline_record(void);
|
|
void tracing_stop_cmdline_record(void);
|
|
void tracing_start_tgid_record(void);
|
|
void tracing_stop_tgid_record(void);
|
|
|
|
int register_tracer(struct tracer *type);
|
|
int is_tracing_stopped(void);
|
|
|
|
loff_t tracing_lseek(struct file *file, loff_t offset, int whence);
|
|
|
|
extern cpumask_var_t __read_mostly tracing_buffer_mask;
|
|
|
|
#define for_each_tracing_cpu(cpu) \
|
|
for_each_cpu(cpu, tracing_buffer_mask)
|
|
|
|
extern unsigned long nsecs_to_usecs(unsigned long nsecs);
|
|
|
|
extern unsigned long tracing_thresh;
|
|
|
|
/* PID filtering */
|
|
|
|
extern int pid_max;
|
|
|
|
bool trace_find_filtered_pid(struct trace_pid_list *filtered_pids,
|
|
pid_t search_pid);
|
|
bool trace_ignore_this_task(struct trace_pid_list *filtered_pids,
|
|
struct task_struct *task);
|
|
void trace_filter_add_remove_task(struct trace_pid_list *pid_list,
|
|
struct task_struct *self,
|
|
struct task_struct *task);
|
|
void *trace_pid_next(struct trace_pid_list *pid_list, void *v, loff_t *pos);
|
|
void *trace_pid_start(struct trace_pid_list *pid_list, loff_t *pos);
|
|
int trace_pid_show(struct seq_file *m, void *v);
|
|
void trace_free_pid_list(struct trace_pid_list *pid_list);
|
|
int trace_pid_write(struct trace_pid_list *filtered_pids,
|
|
struct trace_pid_list **new_pid_list,
|
|
const char __user *ubuf, size_t cnt);
|
|
|
|
#ifdef CONFIG_TRACER_MAX_TRACE
|
|
void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
|
|
void update_max_tr_single(struct trace_array *tr,
|
|
struct task_struct *tsk, int cpu);
|
|
#endif /* CONFIG_TRACER_MAX_TRACE */
|
|
|
|
#ifdef CONFIG_STACKTRACE
|
|
void ftrace_trace_userstack(struct trace_array *tr,
|
|
struct ring_buffer *buffer, unsigned long flags,
|
|
int pc);
|
|
|
|
void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
|
|
int pc);
|
|
#else
|
|
static inline void ftrace_trace_userstack(struct trace_array *tr,
|
|
struct ring_buffer *buffer,
|
|
unsigned long flags, int pc)
|
|
{
|
|
}
|
|
|
|
static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
|
|
int skip, int pc)
|
|
{
|
|
}
|
|
#endif /* CONFIG_STACKTRACE */
|
|
|
|
extern u64 ftrace_now(int cpu);
|
|
|
|
extern void trace_find_cmdline(int pid, char comm[]);
|
|
extern int trace_find_tgid(int pid);
|
|
extern void trace_event_follow_fork(struct trace_array *tr, bool enable);
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
extern unsigned long ftrace_update_tot_cnt;
|
|
extern unsigned long ftrace_number_of_pages;
|
|
extern unsigned long ftrace_number_of_groups;
|
|
void ftrace_init_trace_array(struct trace_array *tr);
|
|
#else
|
|
static inline void ftrace_init_trace_array(struct trace_array *tr) { }
|
|
#endif
|
|
#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
|
|
extern int DYN_FTRACE_TEST_NAME(void);
|
|
#define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2
|
|
extern int DYN_FTRACE_TEST_NAME2(void);
|
|
|
|
extern bool ring_buffer_expanded;
|
|
extern bool tracing_selftest_disabled;
|
|
|
|
#ifdef CONFIG_FTRACE_STARTUP_TEST
|
|
extern int trace_selftest_startup_function(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_function_graph(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_irqsoff(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_preemptoff(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_wakeup(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_nop(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
extern int trace_selftest_startup_branch(struct tracer *trace,
|
|
struct trace_array *tr);
|
|
/*
|
|
* Tracer data references selftest functions that only occur
|
|
* on boot up. These can be __init functions. Thus, when selftests
|
|
* are enabled, then the tracers need to reference __init functions.
|
|
*/
|
|
#define __tracer_data __refdata
|
|
#else
|
|
/* Tracers are seldom changed. Optimize when selftests are disabled. */
|
|
#define __tracer_data __read_mostly
|
|
#endif /* CONFIG_FTRACE_STARTUP_TEST */
|
|
|
|
extern void *head_page(struct trace_array_cpu *data);
|
|
extern unsigned long long ns2usecs(u64 nsec);
|
|
extern int
|
|
trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
|
|
extern int
|
|
trace_vprintk(unsigned long ip, const char *fmt, va_list args);
|
|
extern int
|
|
trace_array_vprintk(struct trace_array *tr,
|
|
unsigned long ip, const char *fmt, va_list args);
|
|
int trace_array_printk(struct trace_array *tr,
|
|
unsigned long ip, const char *fmt, ...);
|
|
int trace_array_printk_buf(struct ring_buffer *buffer,
|
|
unsigned long ip, const char *fmt, ...);
|
|
void trace_printk_seq(struct trace_seq *s);
|
|
enum print_line_t print_trace_line(struct trace_iterator *iter);
|
|
|
|
extern char trace_find_mark(unsigned long long duration);
|
|
|
|
struct ftrace_hash;
|
|
|
|
struct ftrace_mod_load {
|
|
struct list_head list;
|
|
char *func;
|
|
char *module;
|
|
int enable;
|
|
};
|
|
|
|
enum {
|
|
FTRACE_HASH_FL_MOD = (1 << 0),
|
|
};
|
|
|
|
struct ftrace_hash {
|
|
unsigned long size_bits;
|
|
struct hlist_head *buckets;
|
|
unsigned long count;
|
|
unsigned long flags;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
struct ftrace_func_entry *
|
|
ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
|
|
|
|
static __always_inline bool ftrace_hash_empty(struct ftrace_hash *hash)
|
|
{
|
|
return !hash || !(hash->count || (hash->flags & FTRACE_HASH_FL_MOD));
|
|
}
|
|
|
|
/* Standard output formatting function used for function return traces */
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
|
|
/* Flag options */
|
|
#define TRACE_GRAPH_PRINT_OVERRUN 0x1
|
|
#define TRACE_GRAPH_PRINT_CPU 0x2
|
|
#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
|
|
#define TRACE_GRAPH_PRINT_PROC 0x8
|
|
#define TRACE_GRAPH_PRINT_DURATION 0x10
|
|
#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
|
|
#define TRACE_GRAPH_PRINT_IRQS 0x40
|
|
#define TRACE_GRAPH_PRINT_TAIL 0x80
|
|
#define TRACE_GRAPH_SLEEP_TIME 0x100
|
|
#define TRACE_GRAPH_GRAPH_TIME 0x200
|
|
#define TRACE_GRAPH_PRINT_FILL_SHIFT 28
|
|
#define TRACE_GRAPH_PRINT_FILL_MASK (0x3 << TRACE_GRAPH_PRINT_FILL_SHIFT)
|
|
|
|
extern void ftrace_graph_sleep_time_control(bool enable);
|
|
extern void ftrace_graph_graph_time_control(bool enable);
|
|
|
|
extern enum print_line_t
|
|
print_graph_function_flags(struct trace_iterator *iter, u32 flags);
|
|
extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
|
|
extern void
|
|
trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
|
|
extern void graph_trace_open(struct trace_iterator *iter);
|
|
extern void graph_trace_close(struct trace_iterator *iter);
|
|
extern int __trace_graph_entry(struct trace_array *tr,
|
|
struct ftrace_graph_ent *trace,
|
|
unsigned long flags, int pc);
|
|
extern void __trace_graph_return(struct trace_array *tr,
|
|
struct ftrace_graph_ret *trace,
|
|
unsigned long flags, int pc);
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
extern struct ftrace_hash __rcu *ftrace_graph_hash;
|
|
extern struct ftrace_hash __rcu *ftrace_graph_notrace_hash;
|
|
|
|
static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
|
|
{
|
|
unsigned long addr = trace->func;
|
|
int ret = 0;
|
|
struct ftrace_hash *hash;
|
|
|
|
preempt_disable_notrace();
|
|
|
|
/*
|
|
* Have to open code "rcu_dereference_sched()" because the
|
|
* function graph tracer can be called when RCU is not
|
|
* "watching".
|
|
* Protected with schedule_on_each_cpu(ftrace_sync)
|
|
*/
|
|
hash = rcu_dereference_protected(ftrace_graph_hash, !preemptible());
|
|
|
|
if (ftrace_hash_empty(hash)) {
|
|
ret = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (ftrace_lookup_ip(hash, addr)) {
|
|
|
|
/*
|
|
* This needs to be cleared on the return functions
|
|
* when the depth is zero.
|
|
*/
|
|
trace_recursion_set(TRACE_GRAPH_BIT);
|
|
trace_recursion_set_depth(trace->depth);
|
|
|
|
/*
|
|
* If no irqs are to be traced, but a set_graph_function
|
|
* is set, and called by an interrupt handler, we still
|
|
* want to trace it.
|
|
*/
|
|
if (in_irq())
|
|
trace_recursion_set(TRACE_IRQ_BIT);
|
|
else
|
|
trace_recursion_clear(TRACE_IRQ_BIT);
|
|
ret = 1;
|
|
}
|
|
|
|
out:
|
|
preempt_enable_notrace();
|
|
return ret;
|
|
}
|
|
|
|
static inline void ftrace_graph_addr_finish(struct ftrace_graph_ret *trace)
|
|
{
|
|
if (trace_recursion_test(TRACE_GRAPH_BIT) &&
|
|
trace->depth == trace_recursion_depth())
|
|
trace_recursion_clear(TRACE_GRAPH_BIT);
|
|
}
|
|
|
|
static inline int ftrace_graph_notrace_addr(unsigned long addr)
|
|
{
|
|
int ret = 0;
|
|
struct ftrace_hash *notrace_hash;
|
|
|
|
preempt_disable_notrace();
|
|
|
|
/*
|
|
* Have to open code "rcu_dereference_sched()" because the
|
|
* function graph tracer can be called when RCU is not
|
|
* "watching".
|
|
* Protected with schedule_on_each_cpu(ftrace_sync)
|
|
*/
|
|
notrace_hash = rcu_dereference_protected(ftrace_graph_notrace_hash,
|
|
!preemptible());
|
|
|
|
if (ftrace_lookup_ip(notrace_hash, addr))
|
|
ret = 1;
|
|
|
|
preempt_enable_notrace();
|
|
return ret;
|
|
}
|
|
#else
|
|
static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline int ftrace_graph_notrace_addr(unsigned long addr)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ftrace_graph_addr_finish(struct ftrace_graph_ret *trace)
|
|
{ }
|
|
#endif /* CONFIG_DYNAMIC_FTRACE */
|
|
|
|
extern unsigned int fgraph_max_depth;
|
|
|
|
static inline bool ftrace_graph_ignore_func(struct ftrace_graph_ent *trace)
|
|
{
|
|
/* trace it when it is-nested-in or is a function enabled. */
|
|
return !(trace_recursion_test(TRACE_GRAPH_BIT) ||
|
|
ftrace_graph_addr(trace)) ||
|
|
(trace->depth < 0) ||
|
|
(fgraph_max_depth && trace->depth >= fgraph_max_depth);
|
|
}
|
|
|
|
#else /* CONFIG_FUNCTION_GRAPH_TRACER */
|
|
static inline enum print_line_t
|
|
print_graph_function_flags(struct trace_iterator *iter, u32 flags)
|
|
{
|
|
return TRACE_TYPE_UNHANDLED;
|
|
}
|
|
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
|
|
|
|
extern struct list_head ftrace_pids;
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
struct ftrace_func_command {
|
|
struct list_head list;
|
|
char *name;
|
|
int (*func)(struct trace_array *tr,
|
|
struct ftrace_hash *hash,
|
|
char *func, char *cmd,
|
|
char *params, int enable);
|
|
};
|
|
extern bool ftrace_filter_param __initdata;
|
|
static inline int ftrace_trace_task(struct trace_array *tr)
|
|
{
|
|
return !this_cpu_read(tr->trace_buffer.data->ftrace_ignore_pid);
|
|
}
|
|
extern int ftrace_is_dead(void);
|
|
int ftrace_create_function_files(struct trace_array *tr,
|
|
struct dentry *parent);
|
|
void ftrace_destroy_function_files(struct trace_array *tr);
|
|
void ftrace_init_global_array_ops(struct trace_array *tr);
|
|
void ftrace_init_array_ops(struct trace_array *tr, ftrace_func_t func);
|
|
void ftrace_reset_array_ops(struct trace_array *tr);
|
|
void ftrace_init_tracefs(struct trace_array *tr, struct dentry *d_tracer);
|
|
void ftrace_init_tracefs_toplevel(struct trace_array *tr,
|
|
struct dentry *d_tracer);
|
|
void ftrace_clear_pids(struct trace_array *tr);
|
|
int init_function_trace(void);
|
|
void ftrace_pid_follow_fork(struct trace_array *tr, bool enable);
|
|
#else
|
|
static inline int ftrace_trace_task(struct trace_array *tr)
|
|
{
|
|
return 1;
|
|
}
|
|
static inline int ftrace_is_dead(void) { return 0; }
|
|
static inline int
|
|
ftrace_create_function_files(struct trace_array *tr,
|
|
struct dentry *parent)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ftrace_destroy_function_files(struct trace_array *tr) { }
|
|
static inline __init void
|
|
ftrace_init_global_array_ops(struct trace_array *tr) { }
|
|
static inline void ftrace_reset_array_ops(struct trace_array *tr) { }
|
|
static inline void ftrace_init_tracefs(struct trace_array *tr, struct dentry *d) { }
|
|
static inline void ftrace_init_tracefs_toplevel(struct trace_array *tr, struct dentry *d) { }
|
|
static inline void ftrace_clear_pids(struct trace_array *tr) { }
|
|
static inline int init_function_trace(void) { return 0; }
|
|
static inline void ftrace_pid_follow_fork(struct trace_array *tr, bool enable) { }
|
|
/* ftace_func_t type is not defined, use macro instead of static inline */
|
|
#define ftrace_init_array_ops(tr, func) do { } while (0)
|
|
#endif /* CONFIG_FUNCTION_TRACER */
|
|
|
|
#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE)
|
|
|
|
struct ftrace_probe_ops {
|
|
void (*func)(unsigned long ip,
|
|
unsigned long parent_ip,
|
|
struct trace_array *tr,
|
|
struct ftrace_probe_ops *ops,
|
|
void *data);
|
|
int (*init)(struct ftrace_probe_ops *ops,
|
|
struct trace_array *tr,
|
|
unsigned long ip, void *init_data,
|
|
void **data);
|
|
void (*free)(struct ftrace_probe_ops *ops,
|
|
struct trace_array *tr,
|
|
unsigned long ip, void *data);
|
|
int (*print)(struct seq_file *m,
|
|
unsigned long ip,
|
|
struct ftrace_probe_ops *ops,
|
|
void *data);
|
|
};
|
|
|
|
struct ftrace_func_mapper;
|
|
typedef int (*ftrace_mapper_func)(void *data);
|
|
|
|
struct ftrace_func_mapper *allocate_ftrace_func_mapper(void);
|
|
void **ftrace_func_mapper_find_ip(struct ftrace_func_mapper *mapper,
|
|
unsigned long ip);
|
|
int ftrace_func_mapper_add_ip(struct ftrace_func_mapper *mapper,
|
|
unsigned long ip, void *data);
|
|
void *ftrace_func_mapper_remove_ip(struct ftrace_func_mapper *mapper,
|
|
unsigned long ip);
|
|
void free_ftrace_func_mapper(struct ftrace_func_mapper *mapper,
|
|
ftrace_mapper_func free_func);
|
|
|
|
extern int
|
|
register_ftrace_function_probe(char *glob, struct trace_array *tr,
|
|
struct ftrace_probe_ops *ops, void *data);
|
|
extern int
|
|
unregister_ftrace_function_probe_func(char *glob, struct trace_array *tr,
|
|
struct ftrace_probe_ops *ops);
|
|
extern void clear_ftrace_function_probes(struct trace_array *tr);
|
|
|
|
int register_ftrace_command(struct ftrace_func_command *cmd);
|
|
int unregister_ftrace_command(struct ftrace_func_command *cmd);
|
|
|
|
void ftrace_create_filter_files(struct ftrace_ops *ops,
|
|
struct dentry *parent);
|
|
void ftrace_destroy_filter_files(struct ftrace_ops *ops);
|
|
#else
|
|
struct ftrace_func_command;
|
|
|
|
static inline __init int register_ftrace_command(struct ftrace_func_command *cmd)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline __init int unregister_ftrace_command(char *cmd_name)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline void clear_ftrace_function_probes(struct trace_array *tr)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* The ops parameter passed in is usually undefined.
|
|
* This must be a macro.
|
|
*/
|
|
#define ftrace_create_filter_files(ops, parent) do { } while (0)
|
|
#define ftrace_destroy_filter_files(ops) do { } while (0)
|
|
#endif /* CONFIG_FUNCTION_TRACER && CONFIG_DYNAMIC_FTRACE */
|
|
|
|
bool ftrace_event_is_function(struct trace_event_call *call);
|
|
|
|
/*
|
|
* struct trace_parser - servers for reading the user input separated by spaces
|
|
* @cont: set if the input is not complete - no final space char was found
|
|
* @buffer: holds the parsed user input
|
|
* @idx: user input length
|
|
* @size: buffer size
|
|
*/
|
|
struct trace_parser {
|
|
bool cont;
|
|
char *buffer;
|
|
unsigned idx;
|
|
unsigned size;
|
|
};
|
|
|
|
static inline bool trace_parser_loaded(struct trace_parser *parser)
|
|
{
|
|
return (parser->idx != 0);
|
|
}
|
|
|
|
static inline bool trace_parser_cont(struct trace_parser *parser)
|
|
{
|
|
return parser->cont;
|
|
}
|
|
|
|
static inline void trace_parser_clear(struct trace_parser *parser)
|
|
{
|
|
parser->cont = false;
|
|
parser->idx = 0;
|
|
}
|
|
|
|
extern int trace_parser_get_init(struct trace_parser *parser, int size);
|
|
extern void trace_parser_put(struct trace_parser *parser);
|
|
extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
|
|
size_t cnt, loff_t *ppos);
|
|
|
|
/*
|
|
* Only create function graph options if function graph is configured.
|
|
*/
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
# define FGRAPH_FLAGS \
|
|
C(DISPLAY_GRAPH, "display-graph"),
|
|
#else
|
|
# define FGRAPH_FLAGS
|
|
#endif
|
|
|
|
#ifdef CONFIG_BRANCH_TRACER
|
|
# define BRANCH_FLAGS \
|
|
C(BRANCH, "branch"),
|
|
#else
|
|
# define BRANCH_FLAGS
|
|
#endif
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
# define FUNCTION_FLAGS \
|
|
C(FUNCTION, "function-trace"), \
|
|
C(FUNC_FORK, "function-fork"),
|
|
# define FUNCTION_DEFAULT_FLAGS TRACE_ITER_FUNCTION
|
|
#else
|
|
# define FUNCTION_FLAGS
|
|
# define FUNCTION_DEFAULT_FLAGS 0UL
|
|
# define TRACE_ITER_FUNC_FORK 0UL
|
|
#endif
|
|
|
|
#ifdef CONFIG_STACKTRACE
|
|
# define STACK_FLAGS \
|
|
C(STACKTRACE, "stacktrace"),
|
|
#else
|
|
# define STACK_FLAGS
|
|
#endif
|
|
|
|
/*
|
|
* trace_iterator_flags is an enumeration that defines bit
|
|
* positions into trace_flags that controls the output.
|
|
*
|
|
* NOTE: These bits must match the trace_options array in
|
|
* trace.c (this macro guarantees it).
|
|
*/
|
|
#define TRACE_FLAGS \
|
|
C(PRINT_PARENT, "print-parent"), \
|
|
C(SYM_OFFSET, "sym-offset"), \
|
|
C(SYM_ADDR, "sym-addr"), \
|
|
C(VERBOSE, "verbose"), \
|
|
C(RAW, "raw"), \
|
|
C(HEX, "hex"), \
|
|
C(BIN, "bin"), \
|
|
C(BLOCK, "block"), \
|
|
C(PRINTK, "trace_printk"), \
|
|
C(ANNOTATE, "annotate"), \
|
|
C(USERSTACKTRACE, "userstacktrace"), \
|
|
C(SYM_USEROBJ, "sym-userobj"), \
|
|
C(PRINTK_MSGONLY, "printk-msg-only"), \
|
|
C(CONTEXT_INFO, "context-info"), /* Print pid/cpu/time */ \
|
|
C(LATENCY_FMT, "latency-format"), \
|
|
C(RECORD_CMD, "record-cmd"), \
|
|
C(RECORD_TGID, "record-tgid"), \
|
|
C(OVERWRITE, "overwrite"), \
|
|
C(STOP_ON_FREE, "disable_on_free"), \
|
|
C(IRQ_INFO, "irq-info"), \
|
|
C(MARKERS, "markers"), \
|
|
C(EVENT_FORK, "event-fork"), \
|
|
FUNCTION_FLAGS \
|
|
FGRAPH_FLAGS \
|
|
STACK_FLAGS \
|
|
BRANCH_FLAGS
|
|
|
|
/*
|
|
* By defining C, we can make TRACE_FLAGS a list of bit names
|
|
* that will define the bits for the flag masks.
|
|
*/
|
|
#undef C
|
|
#define C(a, b) TRACE_ITER_##a##_BIT
|
|
|
|
enum trace_iterator_bits {
|
|
TRACE_FLAGS
|
|
/* Make sure we don't go more than we have bits for */
|
|
TRACE_ITER_LAST_BIT
|
|
};
|
|
|
|
/*
|
|
* By redefining C, we can make TRACE_FLAGS a list of masks that
|
|
* use the bits as defined above.
|
|
*/
|
|
#undef C
|
|
#define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
|
|
|
|
enum trace_iterator_flags { TRACE_FLAGS };
|
|
|
|
/*
|
|
* TRACE_ITER_SYM_MASK masks the options in trace_flags that
|
|
* control the output of kernel symbols.
|
|
*/
|
|
#define TRACE_ITER_SYM_MASK \
|
|
(TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
|
|
|
|
extern struct tracer nop_trace;
|
|
|
|
#ifdef CONFIG_BRANCH_TRACER
|
|
extern int enable_branch_tracing(struct trace_array *tr);
|
|
extern void disable_branch_tracing(void);
|
|
static inline int trace_branch_enable(struct trace_array *tr)
|
|
{
|
|
if (tr->trace_flags & TRACE_ITER_BRANCH)
|
|
return enable_branch_tracing(tr);
|
|
return 0;
|
|
}
|
|
static inline void trace_branch_disable(void)
|
|
{
|
|
/* due to races, always disable */
|
|
disable_branch_tracing();
|
|
}
|
|
#else
|
|
static inline int trace_branch_enable(struct trace_array *tr)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void trace_branch_disable(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_BRANCH_TRACER */
|
|
|
|
/* set ring buffers to default size if not already done so */
|
|
int tracing_update_buffers(void);
|
|
|
|
struct ftrace_event_field {
|
|
struct list_head link;
|
|
const char *name;
|
|
const char *type;
|
|
int filter_type;
|
|
int offset;
|
|
int size;
|
|
int is_signed;
|
|
};
|
|
|
|
struct prog_entry;
|
|
|
|
struct event_filter {
|
|
struct prog_entry __rcu *prog;
|
|
char *filter_string;
|
|
};
|
|
|
|
struct event_subsystem {
|
|
struct list_head list;
|
|
const char *name;
|
|
struct event_filter *filter;
|
|
int ref_count;
|
|
};
|
|
|
|
struct trace_subsystem_dir {
|
|
struct list_head list;
|
|
struct event_subsystem *subsystem;
|
|
struct trace_array *tr;
|
|
struct dentry *entry;
|
|
int ref_count;
|
|
int nr_events;
|
|
};
|
|
|
|
extern int call_filter_check_discard(struct trace_event_call *call, void *rec,
|
|
struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event);
|
|
|
|
void trace_buffer_unlock_commit_regs(struct trace_array *tr,
|
|
struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event,
|
|
unsigned long flags, int pc,
|
|
struct pt_regs *regs);
|
|
|
|
static inline void trace_buffer_unlock_commit(struct trace_array *tr,
|
|
struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event,
|
|
unsigned long flags, int pc)
|
|
{
|
|
trace_buffer_unlock_commit_regs(tr, buffer, event, flags, pc, NULL);
|
|
}
|
|
|
|
DECLARE_PER_CPU(struct ring_buffer_event *, trace_buffered_event);
|
|
DECLARE_PER_CPU(int, trace_buffered_event_cnt);
|
|
void trace_buffered_event_disable(void);
|
|
void trace_buffered_event_enable(void);
|
|
|
|
static inline void
|
|
__trace_event_discard_commit(struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event)
|
|
{
|
|
if (this_cpu_read(trace_buffered_event) == event) {
|
|
/* Simply release the temp buffer */
|
|
this_cpu_dec(trace_buffered_event_cnt);
|
|
return;
|
|
}
|
|
ring_buffer_discard_commit(buffer, event);
|
|
}
|
|
|
|
/*
|
|
* Helper function for event_trigger_unlock_commit{_regs}().
|
|
* If there are event triggers attached to this event that requires
|
|
* filtering against its fields, then they wil be called as the
|
|
* entry already holds the field information of the current event.
|
|
*
|
|
* It also checks if the event should be discarded or not.
|
|
* It is to be discarded if the event is soft disabled and the
|
|
* event was only recorded to process triggers, or if the event
|
|
* filter is active and this event did not match the filters.
|
|
*
|
|
* Returns true if the event is discarded, false otherwise.
|
|
*/
|
|
static inline bool
|
|
__event_trigger_test_discard(struct trace_event_file *file,
|
|
struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event,
|
|
void *entry,
|
|
enum event_trigger_type *tt)
|
|
{
|
|
unsigned long eflags = file->flags;
|
|
|
|
if (eflags & EVENT_FILE_FL_TRIGGER_COND)
|
|
*tt = event_triggers_call(file, entry, event);
|
|
|
|
if (likely(!(file->flags & (EVENT_FILE_FL_SOFT_DISABLED |
|
|
EVENT_FILE_FL_FILTERED |
|
|
EVENT_FILE_FL_PID_FILTER))))
|
|
return false;
|
|
|
|
if (file->flags & EVENT_FILE_FL_SOFT_DISABLED)
|
|
goto discard;
|
|
|
|
if (file->flags & EVENT_FILE_FL_FILTERED &&
|
|
!filter_match_preds(file->filter, entry))
|
|
goto discard;
|
|
|
|
if ((file->flags & EVENT_FILE_FL_PID_FILTER) &&
|
|
trace_event_ignore_this_pid(file))
|
|
goto discard;
|
|
|
|
return false;
|
|
discard:
|
|
__trace_event_discard_commit(buffer, event);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* event_trigger_unlock_commit - handle triggers and finish event commit
|
|
* @file: The file pointer assoctiated to the event
|
|
* @buffer: The ring buffer that the event is being written to
|
|
* @event: The event meta data in the ring buffer
|
|
* @entry: The event itself
|
|
* @irq_flags: The state of the interrupts at the start of the event
|
|
* @pc: The state of the preempt count at the start of the event.
|
|
* @len: The length of the payload data required for stm logging.
|
|
*
|
|
* This is a helper function to handle triggers that require data
|
|
* from the event itself. It also tests the event against filters and
|
|
* if the event is soft disabled and should be discarded.
|
|
*/
|
|
static inline void
|
|
event_trigger_unlock_commit(struct trace_event_file *file,
|
|
struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event,
|
|
void *entry, unsigned long irq_flags, int pc,
|
|
unsigned long len)
|
|
{
|
|
enum event_trigger_type tt = ETT_NONE;
|
|
|
|
if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) {
|
|
if (len)
|
|
stm_log(OST_ENTITY_FTRACE_EVENTS, entry, len);
|
|
|
|
trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc);
|
|
}
|
|
|
|
if (tt)
|
|
event_triggers_post_call(file, tt);
|
|
}
|
|
|
|
/**
|
|
* event_trigger_unlock_commit_regs - handle triggers and finish event commit
|
|
* @file: The file pointer assoctiated to the event
|
|
* @buffer: The ring buffer that the event is being written to
|
|
* @event: The event meta data in the ring buffer
|
|
* @entry: The event itself
|
|
* @irq_flags: The state of the interrupts at the start of the event
|
|
* @pc: The state of the preempt count at the start of the event.
|
|
*
|
|
* This is a helper function to handle triggers that require data
|
|
* from the event itself. It also tests the event against filters and
|
|
* if the event is soft disabled and should be discarded.
|
|
*
|
|
* Same as event_trigger_unlock_commit() but calls
|
|
* trace_buffer_unlock_commit_regs() instead of trace_buffer_unlock_commit().
|
|
*/
|
|
static inline void
|
|
event_trigger_unlock_commit_regs(struct trace_event_file *file,
|
|
struct ring_buffer *buffer,
|
|
struct ring_buffer_event *event,
|
|
void *entry, unsigned long irq_flags, int pc,
|
|
struct pt_regs *regs)
|
|
{
|
|
enum event_trigger_type tt = ETT_NONE;
|
|
|
|
if (!__event_trigger_test_discard(file, buffer, event, entry, &tt))
|
|
trace_buffer_unlock_commit_regs(file->tr, buffer, event,
|
|
irq_flags, pc, regs);
|
|
|
|
if (tt)
|
|
event_triggers_post_call(file, tt);
|
|
}
|
|
|
|
#define FILTER_PRED_INVALID ((unsigned short)-1)
|
|
#define FILTER_PRED_IS_RIGHT (1 << 15)
|
|
#define FILTER_PRED_FOLD (1 << 15)
|
|
|
|
/*
|
|
* The max preds is the size of unsigned short with
|
|
* two flags at the MSBs. One bit is used for both the IS_RIGHT
|
|
* and FOLD flags. The other is reserved.
|
|
*
|
|
* 2^14 preds is way more than enough.
|
|
*/
|
|
#define MAX_FILTER_PRED 16384
|
|
|
|
struct filter_pred;
|
|
struct regex;
|
|
|
|
typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event);
|
|
|
|
typedef int (*regex_match_func)(char *str, struct regex *r, int len);
|
|
|
|
enum regex_type {
|
|
MATCH_FULL = 0,
|
|
MATCH_FRONT_ONLY,
|
|
MATCH_MIDDLE_ONLY,
|
|
MATCH_END_ONLY,
|
|
MATCH_GLOB,
|
|
};
|
|
|
|
struct regex {
|
|
char pattern[MAX_FILTER_STR_VAL];
|
|
int len;
|
|
int field_len;
|
|
regex_match_func match;
|
|
};
|
|
|
|
struct filter_pred {
|
|
filter_pred_fn_t fn;
|
|
u64 val;
|
|
struct regex regex;
|
|
unsigned short *ops;
|
|
struct ftrace_event_field *field;
|
|
int offset;
|
|
int not;
|
|
int op;
|
|
};
|
|
|
|
static inline bool is_string_field(struct ftrace_event_field *field)
|
|
{
|
|
return field->filter_type == FILTER_DYN_STRING ||
|
|
field->filter_type == FILTER_STATIC_STRING ||
|
|
field->filter_type == FILTER_PTR_STRING ||
|
|
field->filter_type == FILTER_COMM;
|
|
}
|
|
|
|
static inline bool is_function_field(struct ftrace_event_field *field)
|
|
{
|
|
return field->filter_type == FILTER_TRACE_FN;
|
|
}
|
|
|
|
extern enum regex_type
|
|
filter_parse_regex(char *buff, int len, char **search, int *not);
|
|
extern void print_event_filter(struct trace_event_file *file,
|
|
struct trace_seq *s);
|
|
extern int apply_event_filter(struct trace_event_file *file,
|
|
char *filter_string);
|
|
extern int apply_subsystem_event_filter(struct trace_subsystem_dir *dir,
|
|
char *filter_string);
|
|
extern void print_subsystem_event_filter(struct event_subsystem *system,
|
|
struct trace_seq *s);
|
|
extern int filter_assign_type(const char *type);
|
|
extern int create_event_filter(struct trace_event_call *call,
|
|
char *filter_str, bool set_str,
|
|
struct event_filter **filterp);
|
|
extern void free_event_filter(struct event_filter *filter);
|
|
|
|
struct ftrace_event_field *
|
|
trace_find_event_field(struct trace_event_call *call, char *name);
|
|
|
|
extern void trace_event_enable_cmd_record(bool enable);
|
|
extern void trace_event_enable_tgid_record(bool enable);
|
|
|
|
extern int event_trace_init(void);
|
|
extern int init_events(void);
|
|
extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr);
|
|
extern int event_trace_del_tracer(struct trace_array *tr);
|
|
|
|
extern struct trace_event_file *__find_event_file(struct trace_array *tr,
|
|
const char *system,
|
|
const char *event);
|
|
extern struct trace_event_file *find_event_file(struct trace_array *tr,
|
|
const char *system,
|
|
const char *event);
|
|
|
|
static inline void *event_file_data(struct file *filp)
|
|
{
|
|
return READ_ONCE(file_inode(filp)->i_private);
|
|
}
|
|
|
|
extern struct mutex event_mutex;
|
|
extern struct list_head ftrace_events;
|
|
|
|
extern const struct file_operations event_trigger_fops;
|
|
extern const struct file_operations event_hist_fops;
|
|
|
|
#ifdef CONFIG_HIST_TRIGGERS
|
|
extern int register_trigger_hist_cmd(void);
|
|
extern int register_trigger_hist_enable_disable_cmds(void);
|
|
#else
|
|
static inline int register_trigger_hist_cmd(void) { return 0; }
|
|
static inline int register_trigger_hist_enable_disable_cmds(void) { return 0; }
|
|
#endif
|
|
|
|
extern int register_trigger_cmds(void);
|
|
extern void clear_event_triggers(struct trace_array *tr);
|
|
|
|
struct event_trigger_data {
|
|
unsigned long count;
|
|
int ref;
|
|
struct event_trigger_ops *ops;
|
|
struct event_command *cmd_ops;
|
|
struct event_filter __rcu *filter;
|
|
char *filter_str;
|
|
void *private_data;
|
|
bool paused;
|
|
bool paused_tmp;
|
|
struct list_head list;
|
|
char *name;
|
|
struct list_head named_list;
|
|
struct event_trigger_data *named_data;
|
|
};
|
|
|
|
/* Avoid typos */
|
|
#define ENABLE_EVENT_STR "enable_event"
|
|
#define DISABLE_EVENT_STR "disable_event"
|
|
#define ENABLE_HIST_STR "enable_hist"
|
|
#define DISABLE_HIST_STR "disable_hist"
|
|
|
|
struct enable_trigger_data {
|
|
struct trace_event_file *file;
|
|
bool enable;
|
|
bool hist;
|
|
};
|
|
|
|
extern int event_enable_trigger_print(struct seq_file *m,
|
|
struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data);
|
|
extern void event_enable_trigger_free(struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data);
|
|
extern int event_enable_trigger_func(struct event_command *cmd_ops,
|
|
struct trace_event_file *file,
|
|
char *glob, char *cmd, char *param);
|
|
extern int event_enable_register_trigger(char *glob,
|
|
struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data,
|
|
struct trace_event_file *file);
|
|
extern void event_enable_unregister_trigger(char *glob,
|
|
struct event_trigger_ops *ops,
|
|
struct event_trigger_data *test,
|
|
struct trace_event_file *file);
|
|
extern void trigger_data_free(struct event_trigger_data *data);
|
|
extern int event_trigger_init(struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data);
|
|
extern int trace_event_trigger_enable_disable(struct trace_event_file *file,
|
|
int trigger_enable);
|
|
extern void update_cond_flag(struct trace_event_file *file);
|
|
extern int set_trigger_filter(char *filter_str,
|
|
struct event_trigger_data *trigger_data,
|
|
struct trace_event_file *file);
|
|
extern struct event_trigger_data *find_named_trigger(const char *name);
|
|
extern bool is_named_trigger(struct event_trigger_data *test);
|
|
extern int save_named_trigger(const char *name,
|
|
struct event_trigger_data *data);
|
|
extern void del_named_trigger(struct event_trigger_data *data);
|
|
extern void pause_named_trigger(struct event_trigger_data *data);
|
|
extern void unpause_named_trigger(struct event_trigger_data *data);
|
|
extern void set_named_trigger_data(struct event_trigger_data *data,
|
|
struct event_trigger_data *named_data);
|
|
extern struct event_trigger_data *
|
|
get_named_trigger_data(struct event_trigger_data *data);
|
|
extern int register_event_command(struct event_command *cmd);
|
|
extern int unregister_event_command(struct event_command *cmd);
|
|
extern int register_trigger_hist_enable_disable_cmds(void);
|
|
|
|
/**
|
|
* struct event_trigger_ops - callbacks for trace event triggers
|
|
*
|
|
* The methods in this structure provide per-event trigger hooks for
|
|
* various trigger operations.
|
|
*
|
|
* All the methods below, except for @init() and @free(), must be
|
|
* implemented.
|
|
*
|
|
* @func: The trigger 'probe' function called when the triggering
|
|
* event occurs. The data passed into this callback is the data
|
|
* that was supplied to the event_command @reg() function that
|
|
* registered the trigger (see struct event_command) along with
|
|
* the trace record, rec.
|
|
*
|
|
* @init: An optional initialization function called for the trigger
|
|
* when the trigger is registered (via the event_command reg()
|
|
* function). This can be used to perform per-trigger
|
|
* initialization such as incrementing a per-trigger reference
|
|
* count, for instance. This is usually implemented by the
|
|
* generic utility function @event_trigger_init() (see
|
|
* trace_event_triggers.c).
|
|
*
|
|
* @free: An optional de-initialization function called for the
|
|
* trigger when the trigger is unregistered (via the
|
|
* event_command @reg() function). This can be used to perform
|
|
* per-trigger de-initialization such as decrementing a
|
|
* per-trigger reference count and freeing corresponding trigger
|
|
* data, for instance. This is usually implemented by the
|
|
* generic utility function @event_trigger_free() (see
|
|
* trace_event_triggers.c).
|
|
*
|
|
* @print: The callback function invoked to have the trigger print
|
|
* itself. This is usually implemented by a wrapper function
|
|
* that calls the generic utility function @event_trigger_print()
|
|
* (see trace_event_triggers.c).
|
|
*/
|
|
struct event_trigger_ops {
|
|
void (*func)(struct event_trigger_data *data,
|
|
void *rec,
|
|
struct ring_buffer_event *rbe);
|
|
int (*init)(struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data);
|
|
void (*free)(struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data);
|
|
int (*print)(struct seq_file *m,
|
|
struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data);
|
|
};
|
|
|
|
/**
|
|
* struct event_command - callbacks and data members for event commands
|
|
*
|
|
* Event commands are invoked by users by writing the command name
|
|
* into the 'trigger' file associated with a trace event. The
|
|
* parameters associated with a specific invocation of an event
|
|
* command are used to create an event trigger instance, which is
|
|
* added to the list of trigger instances associated with that trace
|
|
* event. When the event is hit, the set of triggers associated with
|
|
* that event is invoked.
|
|
*
|
|
* The data members in this structure provide per-event command data
|
|
* for various event commands.
|
|
*
|
|
* All the data members below, except for @post_trigger, must be set
|
|
* for each event command.
|
|
*
|
|
* @name: The unique name that identifies the event command. This is
|
|
* the name used when setting triggers via trigger files.
|
|
*
|
|
* @trigger_type: A unique id that identifies the event command
|
|
* 'type'. This value has two purposes, the first to ensure that
|
|
* only one trigger of the same type can be set at a given time
|
|
* for a particular event e.g. it doesn't make sense to have both
|
|
* a traceon and traceoff trigger attached to a single event at
|
|
* the same time, so traceon and traceoff have the same type
|
|
* though they have different names. The @trigger_type value is
|
|
* also used as a bit value for deferring the actual trigger
|
|
* action until after the current event is finished. Some
|
|
* commands need to do this if they themselves log to the trace
|
|
* buffer (see the @post_trigger() member below). @trigger_type
|
|
* values are defined by adding new values to the trigger_type
|
|
* enum in include/linux/trace_events.h.
|
|
*
|
|
* @flags: See the enum event_command_flags below.
|
|
*
|
|
* All the methods below, except for @set_filter() and @unreg_all(),
|
|
* must be implemented.
|
|
*
|
|
* @func: The callback function responsible for parsing and
|
|
* registering the trigger written to the 'trigger' file by the
|
|
* user. It allocates the trigger instance and registers it with
|
|
* the appropriate trace event. It makes use of the other
|
|
* event_command callback functions to orchestrate this, and is
|
|
* usually implemented by the generic utility function
|
|
* @event_trigger_callback() (see trace_event_triggers.c).
|
|
*
|
|
* @reg: Adds the trigger to the list of triggers associated with the
|
|
* event, and enables the event trigger itself, after
|
|
* initializing it (via the event_trigger_ops @init() function).
|
|
* This is also where commands can use the @trigger_type value to
|
|
* make the decision as to whether or not multiple instances of
|
|
* the trigger should be allowed. This is usually implemented by
|
|
* the generic utility function @register_trigger() (see
|
|
* trace_event_triggers.c).
|
|
*
|
|
* @unreg: Removes the trigger from the list of triggers associated
|
|
* with the event, and disables the event trigger itself, after
|
|
* initializing it (via the event_trigger_ops @free() function).
|
|
* This is usually implemented by the generic utility function
|
|
* @unregister_trigger() (see trace_event_triggers.c).
|
|
*
|
|
* @unreg_all: An optional function called to remove all the triggers
|
|
* from the list of triggers associated with the event. Called
|
|
* when a trigger file is opened in truncate mode.
|
|
*
|
|
* @set_filter: An optional function called to parse and set a filter
|
|
* for the trigger. If no @set_filter() method is set for the
|
|
* event command, filters set by the user for the command will be
|
|
* ignored. This is usually implemented by the generic utility
|
|
* function @set_trigger_filter() (see trace_event_triggers.c).
|
|
*
|
|
* @get_trigger_ops: The callback function invoked to retrieve the
|
|
* event_trigger_ops implementation associated with the command.
|
|
*/
|
|
struct event_command {
|
|
struct list_head list;
|
|
char *name;
|
|
enum event_trigger_type trigger_type;
|
|
int flags;
|
|
int (*func)(struct event_command *cmd_ops,
|
|
struct trace_event_file *file,
|
|
char *glob, char *cmd, char *params);
|
|
int (*reg)(char *glob,
|
|
struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data,
|
|
struct trace_event_file *file);
|
|
void (*unreg)(char *glob,
|
|
struct event_trigger_ops *ops,
|
|
struct event_trigger_data *data,
|
|
struct trace_event_file *file);
|
|
void (*unreg_all)(struct trace_event_file *file);
|
|
int (*set_filter)(char *filter_str,
|
|
struct event_trigger_data *data,
|
|
struct trace_event_file *file);
|
|
struct event_trigger_ops *(*get_trigger_ops)(char *cmd, char *param);
|
|
};
|
|
|
|
/**
|
|
* enum event_command_flags - flags for struct event_command
|
|
*
|
|
* @POST_TRIGGER: A flag that says whether or not this command needs
|
|
* to have its action delayed until after the current event has
|
|
* been closed. Some triggers need to avoid being invoked while
|
|
* an event is currently in the process of being logged, since
|
|
* the trigger may itself log data into the trace buffer. Thus
|
|
* we make sure the current event is committed before invoking
|
|
* those triggers. To do that, the trigger invocation is split
|
|
* in two - the first part checks the filter using the current
|
|
* trace record; if a command has the @post_trigger flag set, it
|
|
* sets a bit for itself in the return value, otherwise it
|
|
* directly invokes the trigger. Once all commands have been
|
|
* either invoked or set their return flag, the current record is
|
|
* either committed or discarded. At that point, if any commands
|
|
* have deferred their triggers, those commands are finally
|
|
* invoked following the close of the current event. In other
|
|
* words, if the event_trigger_ops @func() probe implementation
|
|
* itself logs to the trace buffer, this flag should be set,
|
|
* otherwise it can be left unspecified.
|
|
*
|
|
* @NEEDS_REC: A flag that says whether or not this command needs
|
|
* access to the trace record in order to perform its function,
|
|
* regardless of whether or not it has a filter associated with
|
|
* it (filters make a trigger require access to the trace record
|
|
* but are not always present).
|
|
*/
|
|
enum event_command_flags {
|
|
EVENT_CMD_FL_POST_TRIGGER = 1,
|
|
EVENT_CMD_FL_NEEDS_REC = 2,
|
|
};
|
|
|
|
static inline bool event_command_post_trigger(struct event_command *cmd_ops)
|
|
{
|
|
return cmd_ops->flags & EVENT_CMD_FL_POST_TRIGGER;
|
|
}
|
|
|
|
static inline bool event_command_needs_rec(struct event_command *cmd_ops)
|
|
{
|
|
return cmd_ops->flags & EVENT_CMD_FL_NEEDS_REC;
|
|
}
|
|
|
|
extern int trace_event_enable_disable(struct trace_event_file *file,
|
|
int enable, int soft_disable);
|
|
extern int tracing_alloc_snapshot(void);
|
|
|
|
extern const char *__start___trace_bprintk_fmt[];
|
|
extern const char *__stop___trace_bprintk_fmt[];
|
|
|
|
extern const char *__start___tracepoint_str[];
|
|
extern const char *__stop___tracepoint_str[];
|
|
|
|
void trace_printk_control(bool enabled);
|
|
void trace_printk_init_buffers(void);
|
|
void trace_printk_start_comm(void);
|
|
int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
|
|
int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled);
|
|
|
|
#define MAX_EVENT_NAME_LEN 64
|
|
|
|
extern int trace_run_command(const char *buf, int (*createfn)(int, char**));
|
|
extern ssize_t trace_parse_run_command(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos,
|
|
int (*createfn)(int, char**));
|
|
|
|
/*
|
|
* Normal trace_printk() and friends allocates special buffers
|
|
* to do the manipulation, as well as saves the print formats
|
|
* into sections to display. But the trace infrastructure wants
|
|
* to use these without the added overhead at the price of being
|
|
* a bit slower (used mainly for warnings, where we don't care
|
|
* about performance). The internal_trace_puts() is for such
|
|
* a purpose.
|
|
*/
|
|
#define internal_trace_puts(str) __trace_puts(_THIS_IP_, str, strlen(str))
|
|
|
|
#undef FTRACE_ENTRY
|
|
#define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \
|
|
extern struct trace_event_call \
|
|
__aligned(4) event_##call;
|
|
#undef FTRACE_ENTRY_DUP
|
|
#define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \
|
|
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \
|
|
filter)
|
|
#undef FTRACE_ENTRY_PACKED
|
|
#define FTRACE_ENTRY_PACKED(call, struct_name, id, tstruct, print, filter) \
|
|
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \
|
|
filter)
|
|
|
|
#include "trace_entries.h"
|
|
|
|
#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER)
|
|
int perf_ftrace_event_register(struct trace_event_call *call,
|
|
enum trace_reg type, void *data);
|
|
#else
|
|
#define perf_ftrace_event_register NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_FTRACE_SYSCALLS
|
|
void init_ftrace_syscalls(void);
|
|
const char *get_syscall_name(int syscall);
|
|
#else
|
|
static inline void init_ftrace_syscalls(void) { }
|
|
static inline const char *get_syscall_name(int syscall)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_EVENT_TRACING
|
|
void trace_event_init(void);
|
|
void trace_event_eval_update(struct trace_eval_map **map, int len);
|
|
#else
|
|
static inline void __init trace_event_init(void) { }
|
|
static inline void trace_event_eval_update(struct trace_eval_map **map, int len) { }
|
|
#endif
|
|
|
|
#ifdef CONFIG_TRACER_SNAPSHOT
|
|
void tracing_snapshot_instance(struct trace_array *tr);
|
|
int tracing_alloc_snapshot_instance(struct trace_array *tr);
|
|
#else
|
|
static inline void tracing_snapshot_instance(struct trace_array *tr) { }
|
|
static inline int tracing_alloc_snapshot_instance(struct trace_array *tr)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PREEMPT_TRACER
|
|
void tracer_preempt_on(unsigned long a0, unsigned long a1);
|
|
void tracer_preempt_off(unsigned long a0, unsigned long a1);
|
|
#else
|
|
static inline void tracer_preempt_on(unsigned long a0, unsigned long a1) { }
|
|
static inline void tracer_preempt_off(unsigned long a0, unsigned long a1) { }
|
|
#endif
|
|
#ifdef CONFIG_IRQSOFF_TRACER
|
|
void tracer_hardirqs_on(unsigned long a0, unsigned long a1);
|
|
void tracer_hardirqs_off(unsigned long a0, unsigned long a1);
|
|
#else
|
|
static inline void tracer_hardirqs_on(unsigned long a0, unsigned long a1) { }
|
|
static inline void tracer_hardirqs_off(unsigned long a0, unsigned long a1) { }
|
|
#endif
|
|
|
|
extern struct trace_iterator *tracepoint_print_iter;
|
|
|
|
/*
|
|
* Reset the state of the trace_iterator so that it can read consumed data.
|
|
* Normally, the trace_iterator is used for reading the data when it is not
|
|
* consumed, and must retain state.
|
|
*/
|
|
static __always_inline void trace_iterator_reset(struct trace_iterator *iter)
|
|
{
|
|
const size_t offset = offsetof(struct trace_iterator, seq);
|
|
|
|
/*
|
|
* Keep gcc from complaining about overwriting more than just one
|
|
* member in the structure.
|
|
*/
|
|
memset((char *)iter + offset, 0, sizeof(struct trace_iterator) - offset);
|
|
|
|
iter->pos = -1;
|
|
}
|
|
|
|
#endif /* _LINUX_KERNEL_TRACE_H */
|