Changes in 4.9.229 power: supply: bq24257_charger: Replace depends on REGMAP_I2C with select clk: sunxi: Fix incorrect usage of round_down() i2c: piix4: Detect secondary SMBus controller on AMD AM4 chipsets iio: pressure: bmp280: Tolerate IRQ before registering clk: qcom: msm8916: Fix the address location of pll->config_reg backlight: lp855x: Ensure regulators are disabled on probe failure ARM: integrator: Add some Kconfig selections ALSA: isa/wavefront: prevent out of bounds write in ioctl scsi: qla2xxx: Fix issue with adapter's stopping state iio: bmp280: fix compensation of humidity i2c: pxa: clear all master action bits in i2c_pxa_stop_message() usblp: poison URBs upon disconnect PCI: aardvark: Don't blindly enable ASPM L0s and don't write to read-only register ps3disk: use the default segment boundary vfio/pci: fix memory leaks in alloc_perm_bits() mfd: wm8994: Fix driver operation if loaded as modules scsi: lpfc: Fix lpfc_nodelist leak when processing unsolicited event clk: clk-flexgen: fix clock-critical handling powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple hv-24x7 events run nfsd: Fix svc_xprt refcnt leak when setup callback client failed powerpc/crashkernel: Take "mem=" option into account yam: fix possible memory leak in yam_init_driver mksysmap: Fix the mismatch of '.L' symbols in System.map scsi: sr: Fix sr_probe() missing deallocate of device minor scsi: ibmvscsi: Don't send host info in adapter info MAD after LPM ALSA: usb-audio: Improve frames size computation s390/qdio: put thinint indicator after early error tty: hvc: Fix data abort due to race in hvc_open staging: sm750fb: add missing case while setting FB_VISUAL i2c: pxa: fix i2c_pxa_scream_blue_murder() debug output serial: amba-pl011: Make sure we initialize the port.lock spinlock drivers: base: Fix NULL pointer exception in __platform_driver_probe() if a driver developer is foolish PCI: rcar: Fix incorrect programming of OB windows PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges power: supply: lp8788: Fix an error handling path in 'lp8788_charger_probe()' power: supply: smb347-charger: IRQSTAT_D is volatile scsi: mpt3sas: Fix double free warnings dlm: remove BUG() before panic() clk: ti: composite: fix memory leak tty: n_gsm: Fix SOF skipping tty: n_gsm: Fix waking up upper tty layer when room available powerpc/pseries/ras: Fix FWNMI_VALID off by one powerpc/ps3: Fix kexec shutdown hang vfio-pci: Mask cap zero usb/ohci-platform: Fix a warning when hibernating drm/msm/mdp5: Fix mdp5_init error path for failed mdp5_kms allocation USB: host: ehci-mxc: Add error handling in ehci_mxc_drv_probe() tty: n_gsm: Fix bogus i++ in gsm_data_kick clk: samsung: exynos5433: Add IGNORE_UNUSED flag to sclk_i2s1 powerpc/64s/pgtable: fix an undefined behaviour PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port IB/cma: Fix ports memory leak in cma_configfs watchdog: da9062: No need to ping manually before setting timeout usb: dwc2: gadget: move gadget resume after the core is in L0 state USB: gadget: udc: s3c2410_udc: Remove pointless NULL check in s3c2410_udc_nuke usb: gadget: lpc32xx_udc: don't dereference ep pointer before null check usb: gadget: fix potential double-free in m66592_probe. usb: gadget: Fix issue with config_ep_by_speed function clk: bcm2835: Fix return type of bcm2835_register_gate net: sunrpc: Fix off-by-one issues in 'rpc_ntop6' NFSv4.1 fix rpc_call_done assignment for BIND_CONN_TO_SESSION extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()' ASoC: fsl_asrc_dma: Fix dma_chan leak when config DMA channel failed openrisc: Fix issue with argument clobbering for clone/fork gfs2: Allow lock_nolock mount to specify jid=X scsi: iscsi: Fix reference count leak in iscsi_boot_create_kobj pinctrl: imxl: Fix an error handling path in 'imx1_pinctrl_core_probe()' crypto: omap-sham - add proper load balancing support for multicore lib/zlib: remove outdated and incorrect pre-increment optimization include/linux/bitops.h: avoid clang shift-count-overflow warnings elfnote: mark all .note sections SHF_ALLOC selftests/vm/pkeys: fix alloc_random_pkey() to make it really random selftests/net: in timestamping, strncpy needs to preserve null byte scsi: acornscsi: Fix an error handling path in acornscsi_probe() usb/xhci-plat: Set PM runtime as active on resume usb/ehci-platform: Set PM runtime as active on resume perf report: Fix NULL pointer dereference in hists__fprintf_nr_sample_events() bcache: fix potential deadlock problem in btree_gc_coalesce block: Fix use-after-free in blkdev_get() libata: Use per port sync for detach drm: encoder_slave: fix refcouting error for modules drm/dp_mst: Reformat drm_dp_check_act_status() a bit drm/qxl: Use correct notify port address when creating cursor ring selinux: fix double free ext4: fix partial cluster initialization when splitting extent drm/dp_mst: Increase ACT retry timeout to 3s x86/boot/compressed: Relax sed symbol type regex for LLVM ld.lld block: nr_sects_write(): Disable preemption on seqcount write s390: fix syscall_get_error for compat processes drm/i915: Whitelist context-local timestamp in the gen9 cmdparser crypto: algboss - don't wait during notifier callback kprobes: Fix to protect kick_kprobe_optimizer() by kprobe_mutex powerpc/kprobes: Fixes for kprobe_lookup_name() on BE x86/kprobes: Avoid kretprobe recursion bug kretprobe: Prevent triggering kretprobe from within kprobe_flush_task e1000e: Do not wake up the system via WOL if device wakeup is disabled sched/rt, net: Use CONFIG_PREEMPTION.patch net: core: device_rename: Use rwsem instead of a seqcount media: dvb_frontend: initialize variable s with FE_NONE instead of 0 media: dvb/frontend.h: move out a private internal structure media: dvb/frontend.h: document the uAPI file media: dvb_frontend: get rid of get_property() callback media: stv0288: get rid of set_property boilerplate media: stv6110: get rid of a srate dead code media: friio-fe: get rid of set_property() media: dvb_frontend: get rid of set_property() callback media: dvb_frontend: cleanup dvb_frontend_ioctl_properties() media: dvb_frontend: cleanup ioctl handling logic media: dvb_frontend: get rid of property cache's state media: dvb_frontend: better document the -EPERM condition media: dvb_frontend: fix return values for FE_SET_PROPERTY media: dvb_frontend: dtv_property_process_set() cleanups media: dvb_frontend: be sure to init dvb_frontend_handle_ioctl() return code media: dvb_frontend: Add unlocked_ioctl in dvb_frontend.c media: dvb_frontend: Add compat_ioctl callback media: dvb_frontend: Add commands implementation for compat ioct media: dvb_frontend: fix wrong cast in compat_ioctl media: dvb_frontend: fix return error code mtd: rawnand: Pass a nand_chip object to nand_release() mtd: rawnand: diskonchip: Fix the probe error path mtd: rawnand: sharpsl: Fix the probe error path mtd: rawnand: xway: Fix the probe error path mtd: rawnand: orion: Fix the probe error path mtd: rawnand: socrates: Fix the probe error path mtd: rawnand: plat_nand: Fix the probe error path mtd: rawnand: mtk: Fix the probe error path mtd: rawnand: tmio: Fix the probe error path scsi: scsi_devinfo: handle non-terminated strings l2tp: Allow duplicate session creation with UDP net: sched: export __netdev_watchdog_up() fix a braino in "sparc32: fix register window handling in genregs32_[gs]et()" mld: fix memory leak in ipv6_mc_destroy_dev() net: fix memleak in register_netdevice() net: usb: ax88179_178a: fix packet alignment padding rocker: fix incorrect error handling in dma_rings_init rxrpc: Fix notification call on completion of discarded calls tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes ip_tunnel: fix use-after-free in ip_tunnel_lookup() tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT ip6_gre: fix use-after-free in ip6gre_tunnel_lookup() tcp: grow window for OOO packets only for SACK flows sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket net: Fix the arp error in some cases net: Do not clear the sock TX queue in sk_set_socket() net: core: reduce recursion limit value USB: ohci-sm501: Add missed iounmap() in remove usb: dwc2: Postponed gadget registration to the udc class driver usb: add USB_QUIRK_DELAY_INIT for Logitech C922 USB: ehci: reopen solution for Synopsys HC bug usb: host: ehci-exynos: Fix error check in exynos_ehci_probe() ALSA: usb-audio: add quirk for Denon DCD-1500RE xhci: Fix incorrect EP_STATE_MASK xhci: Fix enumeration issue when setting max packet size for FS devices. cdc-acm: Add DISABLE_ECHO quirk for Microchip/SMSC chip ALSA: usb-audio: uac1: Invalidate ctl on interrupt ALSA: usb-audio: Clean up mixer element list traverse ALSA: usb-audio: Fix OOB access of mixer element list xhci: Poll for U0 after disabling USB2 LPM cifs/smb3: Fix data inconsistent when punch hole cifs/smb3: Fix data inconsistent when zero file range efi/esrt: Fix reference count leak in esre_create_sysfs_entry. RDMA/mad: Fix possible memory leak in ib_mad_post_receive_mads() net: qed: fix left elements count calculation net: qed: fix NVMe login fails over VFs net: qed: fix excessive QM ILT lines consumption ARM: imx5: add missing put_device() call in imx_suspend_alloc_ocram() usb: gadget: udc: Potential Oops in error handling code netfilter: ipset: fix unaligned atomic access sched/core: Fix PI boosting between RT and DEADLINE tasks ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function net: alx: fix race condition in alx_remove s390/ptrace: fix setting syscall number kbuild: improve cc-option to clean up all temporary files blktrace: break out of blktrace setup on concurrent calls ALSA: hda: Add NVIDIA codec IDs 9a & 9d through a0 to patch table ACPI: sysfs: Fix pm_profile_attr type KVM: X86: Fix MSR range of APIC registers in X2APIC mode mm/slab: use memzero_explicit() in kzfree() ocfs2: load global_inode_alloc ocfs2: fix value of OCFS2_INVALID_SLOT ocfs2: fix panic on nfs server over ocfs2 arm64: perf: Report the PC value in REGS_ABI_32 mode tracing: Fix event trigger to accept redundant spaces drm/radeon: fix fb_div check in ni_init_smc_spll_table() sunrpc: fixed rollback in rpc_gssd_dummy_populate() SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment() pNFS/flexfiles: Fix list corruption if the mirror count changes NFSv4 fix CLOSE not waiting for direct IO compeletion xfs: add agf freeblocks verify in xfs_agf_verify Revert "tty: hvc: Fix data abort due to race in hvc_open" Linux 4.9.229 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I0ce84c8f4c2c437fee36399c358c3dcc19fdfc1d
758 lines
23 KiB
C
758 lines
23 KiB
C
#ifndef _LINUX_GENHD_H
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#define _LINUX_GENHD_H
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/*
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* genhd.h Copyright (C) 1992 Drew Eckhardt
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* Generic hard disk header file by
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* Drew Eckhardt
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*
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* <drew@colorado.edu>
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*/
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#include <linux/types.h>
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#include <linux/kdev_t.h>
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#include <linux/rcupdate.h>
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#include <linux/slab.h>
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#include <linux/percpu-refcount.h>
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#include <linux/uuid.h>
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#ifdef CONFIG_BLOCK
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#define dev_to_disk(device) container_of((device), struct gendisk, part0.__dev)
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#define dev_to_part(device) container_of((device), struct hd_struct, __dev)
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#define disk_to_dev(disk) (&(disk)->part0.__dev)
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#define part_to_dev(part) (&((part)->__dev))
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extern struct device_type part_type;
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extern struct kobject *block_depr;
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extern struct class block_class;
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enum {
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/* These three have identical behaviour; use the second one if DOS FDISK gets
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confused about extended/logical partitions starting past cylinder 1023. */
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DOS_EXTENDED_PARTITION = 5,
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LINUX_EXTENDED_PARTITION = 0x85,
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WIN98_EXTENDED_PARTITION = 0x0f,
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SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION,
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LINUX_SWAP_PARTITION = 0x82,
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LINUX_DATA_PARTITION = 0x83,
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LINUX_LVM_PARTITION = 0x8e,
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LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
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SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION,
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NEW_SOLARIS_X86_PARTITION = 0xbf,
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DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */
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DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */
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DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */
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EZD_PARTITION = 0x55, /* EZ-DRIVE */
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FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */
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OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */
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NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */
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BSDI_PARTITION = 0xb7, /* BSDI Partition ID */
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MINIX_PARTITION = 0x81, /* Minix Partition ID */
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UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */
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};
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#define DISK_MAX_PARTS 256
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#define DISK_NAME_LEN 32
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#include <linux/major.h>
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#include <linux/device.h>
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#include <linux/smp.h>
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#include <linux/string.h>
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#include <linux/fs.h>
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#include <linux/workqueue.h>
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struct partition {
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unsigned char boot_ind; /* 0x80 - active */
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unsigned char head; /* starting head */
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unsigned char sector; /* starting sector */
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unsigned char cyl; /* starting cylinder */
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unsigned char sys_ind; /* What partition type */
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unsigned char end_head; /* end head */
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unsigned char end_sector; /* end sector */
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unsigned char end_cyl; /* end cylinder */
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__le32 start_sect; /* starting sector counting from 0 */
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__le32 nr_sects; /* nr of sectors in partition */
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} __attribute__((packed));
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struct disk_stats {
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unsigned long sectors[2]; /* READs and WRITEs */
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unsigned long ios[2];
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unsigned long merges[2];
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unsigned long ticks[2];
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unsigned long io_ticks;
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unsigned long time_in_queue;
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};
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#define PARTITION_META_INFO_VOLNAMELTH 64
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/*
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* Enough for the string representation of any kind of UUID plus NULL.
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* EFI UUID is 36 characters. MSDOS UUID is 11 characters.
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*/
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#define PARTITION_META_INFO_UUIDLTH (UUID_STRING_LEN + 1)
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struct partition_meta_info {
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char uuid[PARTITION_META_INFO_UUIDLTH];
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u8 volname[PARTITION_META_INFO_VOLNAMELTH];
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};
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struct hd_struct {
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sector_t start_sect;
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/*
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* nr_sects is protected by sequence counter. One might extend a
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* partition while IO is happening to it and update of nr_sects
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* can be non-atomic on 32bit machines with 64bit sector_t.
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*/
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sector_t nr_sects;
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seqcount_t nr_sects_seq;
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sector_t alignment_offset;
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unsigned int discard_alignment;
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struct device __dev;
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struct kobject *holder_dir;
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int policy, partno;
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struct partition_meta_info *info;
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#ifdef CONFIG_FAIL_MAKE_REQUEST
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int make_it_fail;
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#endif
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unsigned long stamp;
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atomic_t in_flight[2];
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#ifdef CONFIG_SMP
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struct disk_stats __percpu *dkstats;
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#else
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struct disk_stats dkstats;
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#endif
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struct percpu_ref ref;
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struct rcu_head rcu_head;
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};
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#define GENHD_FL_REMOVABLE 1
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/* 2 is unused */
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#define GENHD_FL_MEDIA_CHANGE_NOTIFY 4
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#define GENHD_FL_CD 8
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#define GENHD_FL_UP 16
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#define GENHD_FL_SUPPRESS_PARTITION_INFO 32
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#define GENHD_FL_EXT_DEVT 64 /* allow extended devt */
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#define GENHD_FL_NATIVE_CAPACITY 128
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#define GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE 256
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#define GENHD_FL_NO_PART_SCAN 512
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enum {
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DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */
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DISK_EVENT_EJECT_REQUEST = 1 << 1, /* eject requested */
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};
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#define BLK_SCSI_MAX_CMDS (256)
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#define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
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struct blk_scsi_cmd_filter {
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unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
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unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
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struct kobject kobj;
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};
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struct disk_part_tbl {
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struct rcu_head rcu_head;
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int len;
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struct hd_struct __rcu *last_lookup;
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struct hd_struct __rcu *part[];
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};
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struct disk_events;
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struct badblocks;
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#if defined(CONFIG_BLK_DEV_INTEGRITY)
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struct blk_integrity {
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struct blk_integrity_profile *profile;
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unsigned char flags;
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unsigned char tuple_size;
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unsigned char interval_exp;
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unsigned char tag_size;
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};
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#endif /* CONFIG_BLK_DEV_INTEGRITY */
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struct gendisk {
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/* major, first_minor and minors are input parameters only,
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* don't use directly. Use disk_devt() and disk_max_parts().
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*/
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int major; /* major number of driver */
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int first_minor;
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int minors; /* maximum number of minors, =1 for
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* disks that can't be partitioned. */
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char disk_name[DISK_NAME_LEN]; /* name of major driver */
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char *(*devnode)(struct gendisk *gd, umode_t *mode);
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unsigned int events; /* supported events */
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unsigned int async_events; /* async events, subset of all */
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/* Array of pointers to partitions indexed by partno.
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* Protected with matching bdev lock but stat and other
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* non-critical accesses use RCU. Always access through
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* helpers.
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*/
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struct disk_part_tbl __rcu *part_tbl;
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struct hd_struct part0;
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const struct block_device_operations *fops;
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struct request_queue *queue;
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void *private_data;
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int flags;
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struct kobject *slave_dir;
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struct timer_rand_state *random;
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atomic_t sync_io; /* RAID */
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struct disk_events *ev;
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#ifdef CONFIG_BLK_DEV_INTEGRITY
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struct kobject integrity_kobj;
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#endif /* CONFIG_BLK_DEV_INTEGRITY */
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int node_id;
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struct badblocks *bb;
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};
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static inline struct gendisk *part_to_disk(struct hd_struct *part)
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{
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if (likely(part)) {
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if (part->partno)
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return dev_to_disk(part_to_dev(part)->parent);
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else
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return dev_to_disk(part_to_dev(part));
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}
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return NULL;
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}
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static inline int blk_part_pack_uuid(const u8 *uuid_str, u8 *to)
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{
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uuid_be_to_bin(uuid_str, (uuid_be *)to);
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return 0;
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}
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static inline int disk_max_parts(struct gendisk *disk)
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{
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if (disk->flags & GENHD_FL_EXT_DEVT)
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return DISK_MAX_PARTS;
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return disk->minors;
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}
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static inline bool disk_part_scan_enabled(struct gendisk *disk)
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{
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return disk_max_parts(disk) > 1 &&
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!(disk->flags & GENHD_FL_NO_PART_SCAN);
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}
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static inline dev_t disk_devt(struct gendisk *disk)
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{
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return disk_to_dev(disk)->devt;
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}
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static inline dev_t part_devt(struct hd_struct *part)
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{
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return part_to_dev(part)->devt;
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}
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extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno);
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static inline void disk_put_part(struct hd_struct *part)
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{
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if (likely(part))
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put_device(part_to_dev(part));
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}
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/*
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* Smarter partition iterator without context limits.
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*/
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#define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */
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#define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */
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#define DISK_PITER_INCL_PART0 (1 << 2) /* include partition 0 */
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#define DISK_PITER_INCL_EMPTY_PART0 (1 << 3) /* include empty partition 0 */
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struct disk_part_iter {
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struct gendisk *disk;
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struct hd_struct *part;
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int idx;
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unsigned int flags;
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};
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extern void disk_part_iter_init(struct disk_part_iter *piter,
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struct gendisk *disk, unsigned int flags);
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extern struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter);
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extern void disk_part_iter_exit(struct disk_part_iter *piter);
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extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk,
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sector_t sector);
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/*
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* Macros to operate on percpu disk statistics:
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*
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* {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters
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* and should be called between disk_stat_lock() and
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* disk_stat_unlock().
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*
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* part_stat_read() can be called at any time.
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*
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* part_stat_{add|set_all}() and {init|free}_part_stats are for
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* internal use only.
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*/
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#ifdef CONFIG_SMP
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#define part_stat_lock() ({ rcu_read_lock(); get_cpu(); })
|
|
#define part_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0)
|
|
|
|
#define __part_stat_add(cpu, part, field, addnd) \
|
|
(per_cpu_ptr((part)->dkstats, (cpu))->field += (addnd))
|
|
|
|
#define part_stat_read(part, field) \
|
|
({ \
|
|
typeof((part)->dkstats->field) res = 0; \
|
|
unsigned int _cpu; \
|
|
for_each_possible_cpu(_cpu) \
|
|
res += per_cpu_ptr((part)->dkstats, _cpu)->field; \
|
|
res; \
|
|
})
|
|
|
|
static inline void part_stat_set_all(struct hd_struct *part, int value)
|
|
{
|
|
int i;
|
|
|
|
for_each_possible_cpu(i)
|
|
memset(per_cpu_ptr(part->dkstats, i), value,
|
|
sizeof(struct disk_stats));
|
|
}
|
|
|
|
static inline int init_part_stats(struct hd_struct *part)
|
|
{
|
|
part->dkstats = alloc_percpu(struct disk_stats);
|
|
if (!part->dkstats)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static inline void free_part_stats(struct hd_struct *part)
|
|
{
|
|
free_percpu(part->dkstats);
|
|
}
|
|
|
|
#else /* !CONFIG_SMP */
|
|
#define part_stat_lock() ({ rcu_read_lock(); 0; })
|
|
#define part_stat_unlock() rcu_read_unlock()
|
|
|
|
#define __part_stat_add(cpu, part, field, addnd) \
|
|
((part)->dkstats.field += addnd)
|
|
|
|
#define part_stat_read(part, field) ((part)->dkstats.field)
|
|
|
|
static inline void part_stat_set_all(struct hd_struct *part, int value)
|
|
{
|
|
memset(&part->dkstats, value, sizeof(struct disk_stats));
|
|
}
|
|
|
|
static inline int init_part_stats(struct hd_struct *part)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline void free_part_stats(struct hd_struct *part)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
#define part_stat_add(cpu, part, field, addnd) do { \
|
|
__part_stat_add((cpu), (part), field, addnd); \
|
|
if ((part)->partno) \
|
|
__part_stat_add((cpu), &part_to_disk((part))->part0, \
|
|
field, addnd); \
|
|
} while (0)
|
|
|
|
#define part_stat_dec(cpu, gendiskp, field) \
|
|
part_stat_add(cpu, gendiskp, field, -1)
|
|
#define part_stat_inc(cpu, gendiskp, field) \
|
|
part_stat_add(cpu, gendiskp, field, 1)
|
|
#define part_stat_sub(cpu, gendiskp, field, subnd) \
|
|
part_stat_add(cpu, gendiskp, field, -subnd)
|
|
|
|
static inline void part_inc_in_flight(struct hd_struct *part, int rw)
|
|
{
|
|
atomic_inc(&part->in_flight[rw]);
|
|
if (part->partno)
|
|
atomic_inc(&part_to_disk(part)->part0.in_flight[rw]);
|
|
}
|
|
|
|
static inline void part_dec_in_flight(struct hd_struct *part, int rw)
|
|
{
|
|
atomic_dec(&part->in_flight[rw]);
|
|
if (part->partno)
|
|
atomic_dec(&part_to_disk(part)->part0.in_flight[rw]);
|
|
}
|
|
|
|
static inline int part_in_flight(struct hd_struct *part)
|
|
{
|
|
return atomic_read(&part->in_flight[0]) + atomic_read(&part->in_flight[1]);
|
|
}
|
|
|
|
static inline struct partition_meta_info *alloc_part_info(struct gendisk *disk)
|
|
{
|
|
if (disk)
|
|
return kzalloc_node(sizeof(struct partition_meta_info),
|
|
GFP_KERNEL, disk->node_id);
|
|
return kzalloc(sizeof(struct partition_meta_info), GFP_KERNEL);
|
|
}
|
|
|
|
static inline void free_part_info(struct hd_struct *part)
|
|
{
|
|
kfree(part->info);
|
|
}
|
|
|
|
/* block/blk-core.c */
|
|
extern void part_round_stats(int cpu, struct hd_struct *part);
|
|
|
|
/* block/genhd.c */
|
|
extern void device_add_disk(struct device *parent, struct gendisk *disk);
|
|
static inline void add_disk(struct gendisk *disk)
|
|
{
|
|
device_add_disk(NULL, disk);
|
|
}
|
|
|
|
extern void del_gendisk(struct gendisk *gp);
|
|
extern struct gendisk *get_gendisk(dev_t dev, int *partno);
|
|
extern struct block_device *bdget_disk(struct gendisk *disk, int partno);
|
|
|
|
extern void set_device_ro(struct block_device *bdev, int flag);
|
|
extern void set_disk_ro(struct gendisk *disk, int flag);
|
|
|
|
static inline int get_disk_ro(struct gendisk *disk)
|
|
{
|
|
return disk->part0.policy;
|
|
}
|
|
|
|
extern void disk_block_events(struct gendisk *disk);
|
|
extern void disk_unblock_events(struct gendisk *disk);
|
|
extern void disk_flush_events(struct gendisk *disk, unsigned int mask);
|
|
extern unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask);
|
|
|
|
/* drivers/char/random.c */
|
|
extern void add_disk_randomness(struct gendisk *disk) __latent_entropy;
|
|
extern void rand_initialize_disk(struct gendisk *disk);
|
|
|
|
static inline sector_t get_start_sect(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_part->start_sect;
|
|
}
|
|
static inline sector_t get_capacity(struct gendisk *disk)
|
|
{
|
|
return disk->part0.nr_sects;
|
|
}
|
|
static inline void set_capacity(struct gendisk *disk, sector_t size)
|
|
{
|
|
disk->part0.nr_sects = size;
|
|
}
|
|
|
|
#ifdef CONFIG_SOLARIS_X86_PARTITION
|
|
|
|
#define SOLARIS_X86_NUMSLICE 16
|
|
#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
|
|
|
|
struct solaris_x86_slice {
|
|
__le16 s_tag; /* ID tag of partition */
|
|
__le16 s_flag; /* permission flags */
|
|
__le32 s_start; /* start sector no of partition */
|
|
__le32 s_size; /* # of blocks in partition */
|
|
};
|
|
|
|
struct solaris_x86_vtoc {
|
|
unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */
|
|
__le32 v_sanity; /* to verify vtoc sanity */
|
|
__le32 v_version; /* layout version */
|
|
char v_volume[8]; /* volume name */
|
|
__le16 v_sectorsz; /* sector size in bytes */
|
|
__le16 v_nparts; /* number of partitions */
|
|
unsigned int v_reserved[10]; /* free space */
|
|
struct solaris_x86_slice
|
|
v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
|
|
unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */
|
|
char v_asciilabel[128]; /* for compatibility */
|
|
};
|
|
|
|
#endif /* CONFIG_SOLARIS_X86_PARTITION */
|
|
|
|
#ifdef CONFIG_BSD_DISKLABEL
|
|
/*
|
|
* BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>
|
|
* updated by Marc Espie <Marc.Espie@openbsd.org>
|
|
*/
|
|
|
|
/* check against BSD src/sys/sys/disklabel.h for consistency */
|
|
|
|
#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
|
|
#define BSD_MAXPARTITIONS 16
|
|
#define OPENBSD_MAXPARTITIONS 16
|
|
#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */
|
|
struct bsd_disklabel {
|
|
__le32 d_magic; /* the magic number */
|
|
__s16 d_type; /* drive type */
|
|
__s16 d_subtype; /* controller/d_type specific */
|
|
char d_typename[16]; /* type name, e.g. "eagle" */
|
|
char d_packname[16]; /* pack identifier */
|
|
__u32 d_secsize; /* # of bytes per sector */
|
|
__u32 d_nsectors; /* # of data sectors per track */
|
|
__u32 d_ntracks; /* # of tracks per cylinder */
|
|
__u32 d_ncylinders; /* # of data cylinders per unit */
|
|
__u32 d_secpercyl; /* # of data sectors per cylinder */
|
|
__u32 d_secperunit; /* # of data sectors per unit */
|
|
__u16 d_sparespertrack; /* # of spare sectors per track */
|
|
__u16 d_sparespercyl; /* # of spare sectors per cylinder */
|
|
__u32 d_acylinders; /* # of alt. cylinders per unit */
|
|
__u16 d_rpm; /* rotational speed */
|
|
__u16 d_interleave; /* hardware sector interleave */
|
|
__u16 d_trackskew; /* sector 0 skew, per track */
|
|
__u16 d_cylskew; /* sector 0 skew, per cylinder */
|
|
__u32 d_headswitch; /* head switch time, usec */
|
|
__u32 d_trkseek; /* track-to-track seek, usec */
|
|
__u32 d_flags; /* generic flags */
|
|
#define NDDATA 5
|
|
__u32 d_drivedata[NDDATA]; /* drive-type specific information */
|
|
#define NSPARE 5
|
|
__u32 d_spare[NSPARE]; /* reserved for future use */
|
|
__le32 d_magic2; /* the magic number (again) */
|
|
__le16 d_checksum; /* xor of data incl. partitions */
|
|
|
|
/* filesystem and partition information: */
|
|
__le16 d_npartitions; /* number of partitions in following */
|
|
__le32 d_bbsize; /* size of boot area at sn0, bytes */
|
|
__le32 d_sbsize; /* max size of fs superblock, bytes */
|
|
struct bsd_partition { /* the partition table */
|
|
__le32 p_size; /* number of sectors in partition */
|
|
__le32 p_offset; /* starting sector */
|
|
__le32 p_fsize; /* filesystem basic fragment size */
|
|
__u8 p_fstype; /* filesystem type, see below */
|
|
__u8 p_frag; /* filesystem fragments per block */
|
|
__le16 p_cpg; /* filesystem cylinders per group */
|
|
} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
|
|
};
|
|
|
|
#endif /* CONFIG_BSD_DISKLABEL */
|
|
|
|
#ifdef CONFIG_UNIXWARE_DISKLABEL
|
|
/*
|
|
* Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>
|
|
* and Krzysztof G. Baranowski <kgb@knm.org.pl>
|
|
*/
|
|
|
|
#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */
|
|
#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */
|
|
#define UNIXWARE_NUMSLICE 16
|
|
#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */
|
|
|
|
struct unixware_slice {
|
|
__le16 s_label; /* label */
|
|
__le16 s_flags; /* permission flags */
|
|
__le32 start_sect; /* starting sector */
|
|
__le32 nr_sects; /* number of sectors in slice */
|
|
};
|
|
|
|
struct unixware_disklabel {
|
|
__le32 d_type; /* drive type */
|
|
__le32 d_magic; /* the magic number */
|
|
__le32 d_version; /* version number */
|
|
char d_serial[12]; /* serial number of the device */
|
|
__le32 d_ncylinders; /* # of data cylinders per device */
|
|
__le32 d_ntracks; /* # of tracks per cylinder */
|
|
__le32 d_nsectors; /* # of data sectors per track */
|
|
__le32 d_secsize; /* # of bytes per sector */
|
|
__le32 d_part_start; /* # of first sector of this partition */
|
|
__le32 d_unknown1[12]; /* ? */
|
|
__le32 d_alt_tbl; /* byte offset of alternate table */
|
|
__le32 d_alt_len; /* byte length of alternate table */
|
|
__le32 d_phys_cyl; /* # of physical cylinders per device */
|
|
__le32 d_phys_trk; /* # of physical tracks per cylinder */
|
|
__le32 d_phys_sec; /* # of physical sectors per track */
|
|
__le32 d_phys_bytes; /* # of physical bytes per sector */
|
|
__le32 d_unknown2; /* ? */
|
|
__le32 d_unknown3; /* ? */
|
|
__le32 d_pad[8]; /* pad */
|
|
|
|
struct unixware_vtoc {
|
|
__le32 v_magic; /* the magic number */
|
|
__le32 v_version; /* version number */
|
|
char v_name[8]; /* volume name */
|
|
__le16 v_nslices; /* # of slices */
|
|
__le16 v_unknown1; /* ? */
|
|
__le32 v_reserved[10]; /* reserved */
|
|
struct unixware_slice
|
|
v_slice[UNIXWARE_NUMSLICE]; /* slice headers */
|
|
} vtoc;
|
|
|
|
}; /* 408 */
|
|
|
|
#endif /* CONFIG_UNIXWARE_DISKLABEL */
|
|
|
|
#ifdef CONFIG_MINIX_SUBPARTITION
|
|
# define MINIX_NR_SUBPARTITIONS 4
|
|
#endif /* CONFIG_MINIX_SUBPARTITION */
|
|
|
|
#define ADDPART_FLAG_NONE 0
|
|
#define ADDPART_FLAG_RAID 1
|
|
#define ADDPART_FLAG_WHOLEDISK 2
|
|
|
|
extern int blk_alloc_devt(struct hd_struct *part, dev_t *devt);
|
|
extern void blk_free_devt(dev_t devt);
|
|
extern dev_t blk_lookup_devt(const char *name, int partno);
|
|
extern char *disk_name (struct gendisk *hd, int partno, char *buf);
|
|
|
|
extern int disk_expand_part_tbl(struct gendisk *disk, int target);
|
|
extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
|
|
extern int invalidate_partitions(struct gendisk *disk, struct block_device *bdev);
|
|
extern struct hd_struct * __must_check add_partition(struct gendisk *disk,
|
|
int partno, sector_t start,
|
|
sector_t len, int flags,
|
|
struct partition_meta_info
|
|
*info);
|
|
extern void __delete_partition(struct percpu_ref *);
|
|
extern void delete_partition(struct gendisk *, int);
|
|
extern void printk_all_partitions(void);
|
|
|
|
extern struct gendisk *alloc_disk_node(int minors, int node_id);
|
|
extern struct gendisk *alloc_disk(int minors);
|
|
extern struct kobject *get_disk(struct gendisk *disk);
|
|
extern void put_disk(struct gendisk *disk);
|
|
extern void blk_register_region(dev_t devt, unsigned long range,
|
|
struct module *module,
|
|
struct kobject *(*probe)(dev_t, int *, void *),
|
|
int (*lock)(dev_t, void *),
|
|
void *data);
|
|
extern void blk_unregister_region(dev_t devt, unsigned long range);
|
|
|
|
extern ssize_t part_size_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf);
|
|
extern ssize_t part_stat_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf);
|
|
extern ssize_t part_inflight_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf);
|
|
#ifdef CONFIG_FAIL_MAKE_REQUEST
|
|
extern ssize_t part_fail_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf);
|
|
extern ssize_t part_fail_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count);
|
|
#endif /* CONFIG_FAIL_MAKE_REQUEST */
|
|
|
|
static inline int hd_ref_init(struct hd_struct *part)
|
|
{
|
|
if (percpu_ref_init(&part->ref, __delete_partition, 0,
|
|
GFP_KERNEL))
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
static inline void hd_struct_get(struct hd_struct *part)
|
|
{
|
|
percpu_ref_get(&part->ref);
|
|
}
|
|
|
|
static inline int hd_struct_try_get(struct hd_struct *part)
|
|
{
|
|
return percpu_ref_tryget_live(&part->ref);
|
|
}
|
|
|
|
static inline void hd_struct_put(struct hd_struct *part)
|
|
{
|
|
percpu_ref_put(&part->ref);
|
|
}
|
|
|
|
static inline void hd_struct_kill(struct hd_struct *part)
|
|
{
|
|
percpu_ref_kill(&part->ref);
|
|
}
|
|
|
|
static inline void hd_free_part(struct hd_struct *part)
|
|
{
|
|
free_part_stats(part);
|
|
free_part_info(part);
|
|
percpu_ref_exit(&part->ref);
|
|
}
|
|
|
|
/*
|
|
* Any access of part->nr_sects which is not protected by partition
|
|
* bd_mutex or gendisk bdev bd_mutex, should be done using this
|
|
* accessor function.
|
|
*
|
|
* Code written along the lines of i_size_read() and i_size_write().
|
|
* CONFIG_PREEMPT case optimizes the case of UP kernel with preemption
|
|
* on.
|
|
*/
|
|
static inline sector_t part_nr_sects_read(struct hd_struct *part)
|
|
{
|
|
#if BITS_PER_LONG==32 && defined(CONFIG_LBDAF) && defined(CONFIG_SMP)
|
|
sector_t nr_sects;
|
|
unsigned seq;
|
|
do {
|
|
seq = read_seqcount_begin(&part->nr_sects_seq);
|
|
nr_sects = part->nr_sects;
|
|
} while (read_seqcount_retry(&part->nr_sects_seq, seq));
|
|
return nr_sects;
|
|
#elif BITS_PER_LONG==32 && defined(CONFIG_LBDAF) && defined(CONFIG_PREEMPT)
|
|
sector_t nr_sects;
|
|
|
|
preempt_disable();
|
|
nr_sects = part->nr_sects;
|
|
preempt_enable();
|
|
return nr_sects;
|
|
#else
|
|
return part->nr_sects;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Should be called with mutex lock held (typically bd_mutex) of partition
|
|
* to provide mutual exlusion among writers otherwise seqcount might be
|
|
* left in wrong state leaving the readers spinning infinitely.
|
|
*/
|
|
static inline void part_nr_sects_write(struct hd_struct *part, sector_t size)
|
|
{
|
|
#if BITS_PER_LONG==32 && defined(CONFIG_LBDAF) && defined(CONFIG_SMP)
|
|
preempt_disable();
|
|
write_seqcount_begin(&part->nr_sects_seq);
|
|
part->nr_sects = size;
|
|
write_seqcount_end(&part->nr_sects_seq);
|
|
preempt_enable();
|
|
#elif BITS_PER_LONG==32 && defined(CONFIG_LBDAF) && defined(CONFIG_PREEMPT)
|
|
preempt_disable();
|
|
part->nr_sects = size;
|
|
preempt_enable();
|
|
#else
|
|
part->nr_sects = size;
|
|
#endif
|
|
}
|
|
|
|
#if defined(CONFIG_BLK_DEV_INTEGRITY)
|
|
extern void blk_integrity_add(struct gendisk *);
|
|
extern void blk_integrity_del(struct gendisk *);
|
|
#else /* CONFIG_BLK_DEV_INTEGRITY */
|
|
static inline void blk_integrity_add(struct gendisk *disk) { }
|
|
static inline void blk_integrity_del(struct gendisk *disk) { }
|
|
#endif /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
#else /* CONFIG_BLOCK */
|
|
|
|
static inline void printk_all_partitions(void) { }
|
|
|
|
static inline dev_t blk_lookup_devt(const char *name, int partno)
|
|
{
|
|
dev_t devt = MKDEV(0, 0);
|
|
return devt;
|
|
}
|
|
|
|
static inline int blk_part_pack_uuid(const u8 *uuid_str, u8 *to)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif /* CONFIG_BLOCK */
|
|
|
|
#endif /* _LINUX_GENHD_H */
|