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[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
Make it possible to disable the block layer. Not all embedded devices require
it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require
the block layer to be present.
This patch does the following:
(*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev
support.
(*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls
an item that uses the block layer. This includes:
(*) Block I/O tracing.
(*) Disk partition code.
(*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS.
(*) The SCSI layer. As far as I can tell, even SCSI chardevs use the
block layer to do scheduling. Some drivers that use SCSI facilities -
such as USB storage - end up disabled indirectly from this.
(*) Various block-based device drivers, such as IDE and the old CDROM
drivers.
(*) MTD blockdev handling and FTL.
(*) JFFS - which uses set_bdev_super(), something it could avoid doing by
taking a leaf out of JFFS2's book.
(*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and
linux/elevator.h contingent on CONFIG_BLOCK being set. sector_div() is,
however, still used in places, and so is still available.
(*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and
parts of linux/fs.h.
(*) Makes a number of files in fs/ contingent on CONFIG_BLOCK.
(*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK.
(*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK
is not enabled.
(*) fs/no-block.c is created to hold out-of-line stubs and things that are
required when CONFIG_BLOCK is not set:
(*) Default blockdev file operations (to give error ENODEV on opening).
(*) Makes some /proc changes:
(*) /proc/devices does not list any blockdevs.
(*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK.
(*) Makes some compat ioctl handling contingent on CONFIG_BLOCK.
(*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if
given command other than Q_SYNC or if a special device is specified.
(*) In init/do_mounts.c, no reference is made to the blockdev routines if
CONFIG_BLOCK is not defined. This does not prohibit NFS roots or JFFS2.
(*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return
error ENOSYS by way of cond_syscall if so).
(*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if
CONFIG_BLOCK is not set, since they can't then happen.
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
David Howells
Jens Axboe
parent
d366e40a1c
commit
9361401eb7
@ -1,6 +1,24 @@
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#
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# Block layer core configuration
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#
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config BLOCK
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bool "Enable the block layer"
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default y
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help
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This permits the block layer to be removed from the kernel if it's not
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needed (on some embedded devices for example). If this option is
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disabled, then blockdev files will become unusable and some
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filesystems (such as ext3) will become unavailable.
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This option will also disable SCSI character devices and USB storage
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since they make use of various block layer definitions and
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facilities.
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Say Y here unless you know you really don't want to mount disks and
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suchlike.
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if BLOCK
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#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
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#for instance.
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config LBD
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@ -33,4 +51,6 @@ config LSF
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If unsure, say Y.
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endif
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source block/Kconfig.iosched
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@ -1,3 +1,4 @@
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if BLOCK
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menu "IO Schedulers"
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@ -67,3 +68,5 @@ config DEFAULT_IOSCHED
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default "noop" if DEFAULT_NOOP
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endmenu
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endif
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@ -2,7 +2,7 @@
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# Makefile for the kernel block layer
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#
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obj-y := elevator.o ll_rw_blk.o ioctl.o genhd.o scsi_ioctl.o
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obj-$(CONFIG_BLOCK) := elevator.o ll_rw_blk.o ioctl.o genhd.o scsi_ioctl.o
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obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o
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obj-$(CONFIG_IOSCHED_AS) += as-iosched.o
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@ -2,6 +2,8 @@
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# Block device driver configuration
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#
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if BLOCK
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menu "Block devices"
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config BLK_DEV_FD
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@ -468,3 +470,5 @@ config ATA_OVER_ETH
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devices like the Coraid EtherDrive (R) Storage Blade.
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endmenu
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endif
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@ -3,7 +3,7 @@
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#
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menu "Old CD-ROM drivers (not SCSI, not IDE)"
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depends on ISA
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depends on ISA && BLOCK
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config CD_NO_IDESCSI
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bool "Support non-SCSI/IDE/ATAPI CDROM drives"
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@ -1006,6 +1006,7 @@ config GPIO_VR41XX
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config RAW_DRIVER
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tristate "RAW driver (/dev/raw/rawN) (OBSOLETE)"
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depends on BLOCK
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help
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The raw driver permits block devices to be bound to /dev/raw/rawN.
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Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.
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@ -655,6 +655,7 @@ void add_interrupt_randomness(int irq)
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add_timer_randomness(irq_timer_state[irq], 0x100 + irq);
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}
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#ifdef CONFIG_BLOCK
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void add_disk_randomness(struct gendisk *disk)
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{
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if (!disk || !disk->random)
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@ -667,6 +668,7 @@ void add_disk_randomness(struct gendisk *disk)
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}
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EXPORT_SYMBOL(add_disk_randomness);
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#endif
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#define EXTRACT_SIZE 10
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@ -918,6 +920,7 @@ void rand_initialize_irq(int irq)
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}
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}
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#ifdef CONFIG_BLOCK
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void rand_initialize_disk(struct gendisk *disk)
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{
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struct timer_rand_state *state;
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@ -932,6 +935,7 @@ void rand_initialize_disk(struct gendisk *disk)
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disk->random = state;
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}
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}
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#endif
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static ssize_t
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random_read(struct file * file, char __user * buf, size_t nbytes, loff_t *ppos)
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@ -4,6 +4,8 @@
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# Andre Hedrick <andre@linux-ide.org>
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#
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if BLOCK
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menu "ATA/ATAPI/MFM/RLL support"
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config IDE
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@ -1082,3 +1084,5 @@ config BLK_DEV_HD
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endif
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endmenu
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endif
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@ -2,6 +2,8 @@
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# Block device driver configuration
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#
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if BLOCK
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menu "Multi-device support (RAID and LVM)"
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config MD
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@ -251,3 +253,4 @@ config DM_MULTIPATH_EMC
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endmenu
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endif
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@ -88,7 +88,7 @@ config I2O_BUS
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config I2O_BLOCK
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tristate "I2O Block OSM"
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depends on I2O
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depends on I2O && BLOCK
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---help---
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Include support for the I2O Block OSM. The Block OSM presents disk
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and other structured block devices to the operating system. If you
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@ -21,7 +21,7 @@ config MMC_DEBUG
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config MMC_BLOCK
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tristate "MMC block device driver"
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depends on MMC
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depends on MMC && BLOCK
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default y
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help
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Say Y here to enable the MMC block device driver support.
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@ -24,7 +24,8 @@ obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
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obj-$(CONFIG_MMC_OMAP) += omap.o
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obj-$(CONFIG_MMC_AT91RM9200) += at91_mci.o
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mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
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mmc_core-y := mmc.o mmc_sysfs.o
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mmc_core-$(CONFIG_BLOCK) += mmc_queue.o
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ifeq ($(CONFIG_MMC_DEBUG),y)
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EXTRA_CFLAGS += -DDEBUG
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@ -166,7 +166,7 @@ config MTD_CHAR
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config MTD_BLOCK
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tristate "Caching block device access to MTD devices"
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depends on MTD
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depends on MTD && BLOCK
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---help---
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Although most flash chips have an erase size too large to be useful
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as block devices, it is possible to use MTD devices which are based
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@ -188,7 +188,7 @@ config MTD_BLOCK
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config MTD_BLOCK_RO
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tristate "Readonly block device access to MTD devices"
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depends on MTD_BLOCK!=y && MTD
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depends on MTD_BLOCK!=y && MTD && BLOCK
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help
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This allows you to mount read-only file systems (such as cramfs)
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from an MTD device, without the overhead (and danger) of the caching
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@ -199,7 +199,7 @@ config MTD_BLOCK_RO
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config FTL
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tristate "FTL (Flash Translation Layer) support"
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depends on MTD
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depends on MTD && BLOCK
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---help---
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This provides support for the original Flash Translation Layer which
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is part of the PCMCIA specification. It uses a kind of pseudo-
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@ -215,7 +215,7 @@ config FTL
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config NFTL
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tristate "NFTL (NAND Flash Translation Layer) support"
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depends on MTD
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depends on MTD && BLOCK
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---help---
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This provides support for the NAND Flash Translation Layer which is
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used on M-Systems' DiskOnChip devices. It uses a kind of pseudo-
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@ -238,7 +238,7 @@ config NFTL_RW
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config INFTL
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tristate "INFTL (Inverse NAND Flash Translation Layer) support"
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depends on MTD
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depends on MTD && BLOCK
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---help---
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This provides support for the Inverse NAND Flash Translation
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Layer which is used on M-Systems' newer DiskOnChip devices. It
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@ -255,7 +255,7 @@ config INFTL
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config RFD_FTL
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tristate "Resident Flash Disk (Flash Translation Layer) support"
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depends on MTD
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depends on MTD && BLOCK
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---help---
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This provides support for the flash translation layer known
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as the Resident Flash Disk (RFD), as used by the Embedded BIOS
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@ -136,7 +136,7 @@ config MTDRAM_ABS_POS
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config MTD_BLOCK2MTD
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tristate "MTD using block device"
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depends on MTD
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depends on MTD && BLOCK
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help
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This driver allows a block device to appear as an MTD. It would
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generally be used in the following cases:
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@ -1,4 +1,4 @@
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if S390
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if S390 && BLOCK
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comment "S/390 block device drivers"
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depends on S390
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@ -3,11 +3,13 @@ menu "SCSI device support"
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config RAID_ATTRS
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tristate "RAID Transport Class"
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default n
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depends on BLOCK
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---help---
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Provides RAID
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config SCSI
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tristate "SCSI device support"
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depends on BLOCK
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---help---
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If you want to use a SCSI hard disk, SCSI tape drive, SCSI CD-ROM or
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any other SCSI device under Linux, say Y and make sure that you know
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31
fs/Kconfig
31
fs/Kconfig
@ -4,6 +4,8 @@
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menu "File systems"
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if BLOCK
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config EXT2_FS
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tristate "Second extended fs support"
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help
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@ -399,6 +401,8 @@ config ROMFS_FS
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If you don't know whether you need it, then you don't need it:
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answer N.
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endif
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config INOTIFY
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bool "Inotify file change notification support"
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default y
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@ -530,6 +534,7 @@ config FUSE_FS
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If you want to develop a userspace FS, or if you want to use
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a filesystem based on FUSE, answer Y or M.
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if BLOCK
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menu "CD-ROM/DVD Filesystems"
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config ISO9660_FS
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@ -597,7 +602,9 @@ config UDF_NLS
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depends on (UDF_FS=m && NLS) || (UDF_FS=y && NLS=y)
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endmenu
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endif
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if BLOCK
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menu "DOS/FAT/NT Filesystems"
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config FAT_FS
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@ -782,6 +789,7 @@ config NTFS_RW
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It is perfectly safe to say N here.
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endmenu
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endif
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menu "Pseudo filesystems"
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@ -939,7 +947,7 @@ menu "Miscellaneous filesystems"
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config ADFS_FS
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tristate "ADFS file system support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on BLOCK && EXPERIMENTAL
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help
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The Acorn Disc Filing System is the standard file system of the
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RiscOS operating system which runs on Acorn's ARM-based Risc PC
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@ -967,7 +975,7 @@ config ADFS_FS_RW
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config AFFS_FS
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tristate "Amiga FFS file system support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on BLOCK && EXPERIMENTAL
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help
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The Fast File System (FFS) is the common file system used on hard
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disks by Amiga(tm) systems since AmigaOS Version 1.3 (34.20). Say Y
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@ -989,7 +997,7 @@ config AFFS_FS
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config HFS_FS
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tristate "Apple Macintosh file system support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on BLOCK && EXPERIMENTAL
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select NLS
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help
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If you say Y here, you will be able to mount Macintosh-formatted
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@ -1002,6 +1010,7 @@ config HFS_FS
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config HFSPLUS_FS
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tristate "Apple Extended HFS file system support"
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depends on BLOCK
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select NLS
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select NLS_UTF8
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help
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@ -1015,7 +1024,7 @@ config HFSPLUS_FS
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config BEFS_FS
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tristate "BeOS file system (BeFS) support (read only) (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on BLOCK && EXPERIMENTAL
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select NLS
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help
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The BeOS File System (BeFS) is the native file system of Be, Inc's
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@ -1042,7 +1051,7 @@ config BEFS_DEBUG
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config BFS_FS
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tristate "BFS file system support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on BLOCK && EXPERIMENTAL
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help
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Boot File System (BFS) is a file system used under SCO UnixWare to
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allow the bootloader access to the kernel image and other important
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@ -1064,7 +1073,7 @@ config BFS_FS
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config EFS_FS
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tristate "EFS file system support (read only) (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on BLOCK && EXPERIMENTAL
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help
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EFS is an older file system used for non-ISO9660 CD-ROMs and hard
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disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer
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@ -1079,7 +1088,7 @@ config EFS_FS
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config JFFS_FS
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tristate "Journalling Flash File System (JFFS) support"
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depends on MTD
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depends on MTD && BLOCK
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help
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JFFS is the Journaling Flash File System developed by Axis
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Communications in Sweden, aimed at providing a crash/powerdown-safe
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@ -1264,6 +1273,7 @@ endchoice
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config CRAMFS
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tristate "Compressed ROM file system support (cramfs)"
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depends on BLOCK
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select ZLIB_INFLATE
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help
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Saying Y here includes support for CramFs (Compressed ROM File
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@ -1283,6 +1293,7 @@ config CRAMFS
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config VXFS_FS
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tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
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depends on BLOCK
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help
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FreeVxFS is a file system driver that support the VERITAS VxFS(TM)
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file system format. VERITAS VxFS(TM) is the standard file system
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@ -1300,6 +1311,7 @@ config VXFS_FS
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config HPFS_FS
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tristate "OS/2 HPFS file system support"
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depends on BLOCK
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help
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OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS
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is the file system used for organizing files on OS/2 hard disk
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@ -1316,6 +1328,7 @@ config HPFS_FS
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config QNX4FS_FS
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tristate "QNX4 file system support (read only)"
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depends on BLOCK
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help
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This is the file system used by the real-time operating systems
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QNX 4 and QNX 6 (the latter is also called QNX RTP).
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@ -1343,6 +1356,7 @@ config QNX4FS_RW
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config SYSV_FS
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tristate "System V/Xenix/V7/Coherent file system support"
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depends on BLOCK
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help
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SCO, Xenix and Coherent are commercial Unix systems for Intel
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machines, and Version 7 was used on the DEC PDP-11. Saying Y
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@ -1381,6 +1395,7 @@ config SYSV_FS
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config UFS_FS
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tristate "UFS file system support (read only)"
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depends on BLOCK
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help
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BSD and derivate versions of Unix (such as SunOS, FreeBSD, NetBSD,
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OpenBSD and NeXTstep) use a file system called UFS. Some System V
|
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@ -1959,11 +1974,13 @@ config GENERIC_ACL
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endmenu
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if BLOCK
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menu "Partition Types"
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source "fs/partitions/Kconfig"
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endmenu
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endif
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source "fs/nls/Kconfig"
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14
fs/Makefile
14
fs/Makefile
@ -5,12 +5,18 @@
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# Rewritten to use lists instead of if-statements.
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#
|
||||
|
||||
obj-y := open.o read_write.o file_table.o buffer.o bio.o super.o \
|
||||
block_dev.o char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
|
||||
obj-y := open.o read_write.o file_table.o super.o \
|
||||
char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
|
||||
ioctl.o readdir.o select.o fifo.o locks.o dcache.o inode.o \
|
||||
attr.o bad_inode.o file.o filesystems.o namespace.o aio.o \
|
||||
seq_file.o xattr.o libfs.o fs-writeback.o mpage.o direct-io.o \
|
||||
ioprio.o pnode.o drop_caches.o splice.o sync.o
|
||||
seq_file.o xattr.o libfs.o fs-writeback.o \
|
||||
pnode.o drop_caches.o splice.o sync.o
|
||||
|
||||
ifeq ($(CONFIG_BLOCK),y)
|
||||
obj-y += buffer.o bio.o block_dev.o direct-io.o mpage.o ioprio.o
|
||||
else
|
||||
obj-y += no-block.o
|
||||
endif
|
||||
|
||||
obj-$(CONFIG_INOTIFY) += inotify.o
|
||||
obj-$(CONFIG_INOTIFY_USER) += inotify_user.o
|
||||
|
||||
@ -645,6 +645,7 @@ static int routing_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct hd_geometry32 {
|
||||
unsigned char heads;
|
||||
unsigned char sectors;
|
||||
@ -869,6 +870,7 @@ static int sg_grt_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
}
|
||||
return err;
|
||||
}
|
||||
#endif /* CONFIG_BLOCK */
|
||||
|
||||
struct sock_fprog32 {
|
||||
unsigned short len;
|
||||
@ -992,6 +994,7 @@ static int ppp_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
}
|
||||
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct mtget32 {
|
||||
compat_long_t mt_type;
|
||||
compat_long_t mt_resid;
|
||||
@ -1164,6 +1167,7 @@ static int cdrom_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long ar
|
||||
|
||||
return err;
|
||||
}
|
||||
#endif /* CONFIG_BLOCK */
|
||||
|
||||
#ifdef CONFIG_VT
|
||||
|
||||
@ -1491,6 +1495,7 @@ ret_einval(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
static int broken_blkgetsize(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
/* The mkswap binary hard codes it to Intel value :-((( */
|
||||
@ -1525,12 +1530,14 @@ static int blkpg_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long ar
|
||||
|
||||
return sys_ioctl(fd, cmd, (unsigned long)a);
|
||||
}
|
||||
#endif
|
||||
|
||||
static int ioc_settimeout(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return rw_long(fd, AUTOFS_IOC_SETTIMEOUT, arg);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
/* Fix sizeof(sizeof()) breakage */
|
||||
#define BLKBSZGET_32 _IOR(0x12,112,int)
|
||||
#define BLKBSZSET_32 _IOW(0x12,113,int)
|
||||
@ -1551,6 +1558,7 @@ static int do_blkgetsize64(unsigned int fd, unsigned int cmd,
|
||||
{
|
||||
return sys_ioctl(fd, BLKGETSIZE64, (unsigned long)compat_ptr(arg));
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Bluetooth ioctls */
|
||||
#define HCIUARTSETPROTO _IOW('U', 200, int)
|
||||
@ -1571,6 +1579,7 @@ static int do_blkgetsize64(unsigned int fd, unsigned int cmd,
|
||||
#define HIDPGETCONNLIST _IOR('H', 210, int)
|
||||
#define HIDPGETCONNINFO _IOR('H', 211, int)
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct floppy_struct32 {
|
||||
compat_uint_t size;
|
||||
compat_uint_t sect;
|
||||
@ -1895,6 +1904,7 @@ static int fd_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
kfree(karg);
|
||||
return err;
|
||||
}
|
||||
#endif
|
||||
|
||||
struct mtd_oob_buf32 {
|
||||
u_int32_t start;
|
||||
@ -1936,6 +1946,7 @@ static int mtd_rw_oob(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
return err;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct raw32_config_request
|
||||
{
|
||||
compat_int_t raw_minor;
|
||||
@ -2000,6 +2011,7 @@ static int raw_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
#endif /* CONFIG_BLOCK */
|
||||
|
||||
struct serial_struct32 {
|
||||
compat_int_t type;
|
||||
@ -2606,6 +2618,7 @@ HANDLE_IOCTL(SIOCBRDELIF, dev_ifsioc)
|
||||
HANDLE_IOCTL(SIOCRTMSG, ret_einval)
|
||||
HANDLE_IOCTL(SIOCGSTAMP, do_siocgstamp)
|
||||
#endif
|
||||
#ifdef CONFIG_BLOCK
|
||||
HANDLE_IOCTL(HDIO_GETGEO, hdio_getgeo)
|
||||
HANDLE_IOCTL(BLKRAGET, w_long)
|
||||
HANDLE_IOCTL(BLKGETSIZE, w_long)
|
||||
@ -2631,14 +2644,17 @@ HANDLE_IOCTL(FDGETFDCSTAT32, fd_ioctl_trans)
|
||||
HANDLE_IOCTL(FDWERRORGET32, fd_ioctl_trans)
|
||||
HANDLE_IOCTL(SG_IO,sg_ioctl_trans)
|
||||
HANDLE_IOCTL(SG_GET_REQUEST_TABLE, sg_grt_trans)
|
||||
#endif
|
||||
HANDLE_IOCTL(PPPIOCGIDLE32, ppp_ioctl_trans)
|
||||
HANDLE_IOCTL(PPPIOCSCOMPRESS32, ppp_ioctl_trans)
|
||||
HANDLE_IOCTL(PPPIOCSPASS32, ppp_sock_fprog_ioctl_trans)
|
||||
HANDLE_IOCTL(PPPIOCSACTIVE32, ppp_sock_fprog_ioctl_trans)
|
||||
#ifdef CONFIG_BLOCK
|
||||
HANDLE_IOCTL(MTIOCGET32, mt_ioctl_trans)
|
||||
HANDLE_IOCTL(MTIOCPOS32, mt_ioctl_trans)
|
||||
HANDLE_IOCTL(CDROMREADAUDIO, cdrom_ioctl_trans)
|
||||
HANDLE_IOCTL(CDROM_SEND_PACKET, cdrom_ioctl_trans)
|
||||
#endif
|
||||
#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,unsigned int)
|
||||
HANDLE_IOCTL(AUTOFS_IOC_SETTIMEOUT32, ioc_settimeout)
|
||||
#ifdef CONFIG_VT
|
||||
@ -2677,12 +2693,14 @@ HANDLE_IOCTL(SONET_SETFRAMING, do_atm_ioctl)
|
||||
HANDLE_IOCTL(SONET_GETFRAMING, do_atm_ioctl)
|
||||
HANDLE_IOCTL(SONET_GETFRSENSE, do_atm_ioctl)
|
||||
/* block stuff */
|
||||
#ifdef CONFIG_BLOCK
|
||||
HANDLE_IOCTL(BLKBSZGET_32, do_blkbszget)
|
||||
HANDLE_IOCTL(BLKBSZSET_32, do_blkbszset)
|
||||
HANDLE_IOCTL(BLKGETSIZE64_32, do_blkgetsize64)
|
||||
/* Raw devices */
|
||||
HANDLE_IOCTL(RAW_SETBIND, raw_ioctl)
|
||||
HANDLE_IOCTL(RAW_GETBIND, raw_ioctl)
|
||||
#endif
|
||||
/* Serial */
|
||||
HANDLE_IOCTL(TIOCGSERIAL, serial_struct_ioctl)
|
||||
HANDLE_IOCTL(TIOCSSERIAL, serial_struct_ioctl)
|
||||
|
||||
@ -14,10 +14,16 @@
|
||||
/*
|
||||
* block_dev.c
|
||||
*/
|
||||
#ifdef CONFIG_BLOCK
|
||||
extern struct super_block *blockdev_superblock;
|
||||
extern void __init bdev_cache_init(void);
|
||||
|
||||
#define sb_is_blkdev_sb(sb) ((sb) == blockdev_superblock)
|
||||
#else
|
||||
static inline void bdev_cache_init(void) {}
|
||||
|
||||
#define sb_is_blkdev_sb(sb) 0
|
||||
#endif
|
||||
|
||||
/*
|
||||
* char_dev.c
|
||||
|
||||
22
fs/no-block.c
Normal file
22
fs/no-block.c
Normal file
@ -0,0 +1,22 @@
|
||||
/* no-block.c: implementation of routines required for non-BLOCK configuration
|
||||
*
|
||||
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
|
||||
* Written by David Howells (dhowells@redhat.com)
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version
|
||||
* 2 of the License, or (at your option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/fs.h>
|
||||
|
||||
static int no_blkdev_open(struct inode * inode, struct file * filp)
|
||||
{
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
const struct file_operations def_blk_fops = {
|
||||
.open = no_blkdev_open,
|
||||
};
|
||||
@ -2,7 +2,7 @@
|
||||
# Makefile for the linux kernel.
|
||||
#
|
||||
|
||||
obj-y := check.o
|
||||
obj-$(CONFIG_BLOCK) := check.o
|
||||
|
||||
obj-$(CONFIG_ACORN_PARTITION) += acorn.o
|
||||
obj-$(CONFIG_AMIGA_PARTITION) += amiga.o
|
||||
|
||||
@ -277,12 +277,15 @@ static int devinfo_show(struct seq_file *f, void *v)
|
||||
if (i == 0)
|
||||
seq_printf(f, "Character devices:\n");
|
||||
chrdev_show(f, i);
|
||||
} else {
|
||||
}
|
||||
#ifdef CONFIG_BLOCK
|
||||
else {
|
||||
i -= CHRDEV_MAJOR_HASH_SIZE;
|
||||
if (i == 0)
|
||||
seq_printf(f, "\nBlock devices:\n");
|
||||
blkdev_show(f, i);
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -355,6 +358,7 @@ static int stram_read_proc(char *page, char **start, off_t off,
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
extern struct seq_operations partitions_op;
|
||||
static int partitions_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
@ -378,6 +382,7 @@ static struct file_operations proc_diskstats_operations = {
|
||||
.llseek = seq_lseek,
|
||||
.release = seq_release,
|
||||
};
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_MODULES
|
||||
extern struct seq_operations modules_op;
|
||||
@ -695,7 +700,9 @@ void __init proc_misc_init(void)
|
||||
entry->proc_fops = &proc_kmsg_operations;
|
||||
create_seq_entry("devices", 0, &proc_devinfo_operations);
|
||||
create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
|
||||
#ifdef CONFIG_BLOCK
|
||||
create_seq_entry("partitions", 0, &proc_partitions_operations);
|
||||
#endif
|
||||
create_seq_entry("stat", 0, &proc_stat_operations);
|
||||
create_seq_entry("interrupts", 0, &proc_interrupts_operations);
|
||||
#ifdef CONFIG_SLAB
|
||||
@ -707,7 +714,9 @@ void __init proc_misc_init(void)
|
||||
create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
|
||||
create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
|
||||
create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
|
||||
#ifdef CONFIG_BLOCK
|
||||
create_seq_entry("diskstats", 0, &proc_diskstats_operations);
|
||||
#endif
|
||||
#ifdef CONFIG_MODULES
|
||||
create_seq_entry("modules", 0, &proc_modules_operations);
|
||||
#endif
|
||||
|
||||
44
fs/quota.c
44
fs/quota.c
@ -337,6 +337,34 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, void
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* look up a superblock on which quota ops will be performed
|
||||
* - use the name of a block device to find the superblock thereon
|
||||
*/
|
||||
static inline struct super_block *quotactl_block(const char __user *special)
|
||||
{
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct block_device *bdev;
|
||||
struct super_block *sb;
|
||||
char *tmp = getname(special);
|
||||
|
||||
if (IS_ERR(tmp))
|
||||
return ERR_PTR(PTR_ERR(tmp));
|
||||
bdev = lookup_bdev(tmp);
|
||||
putname(tmp);
|
||||
if (IS_ERR(bdev))
|
||||
return ERR_PTR(PTR_ERR(bdev));
|
||||
sb = get_super(bdev);
|
||||
bdput(bdev);
|
||||
if (!sb)
|
||||
return ERR_PTR(-ENODEV);
|
||||
|
||||
return sb;
|
||||
#else
|
||||
return ERR_PTR(-ENODEV);
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* This is the system call interface. This communicates with
|
||||
* the user-level programs. Currently this only supports diskquota
|
||||
@ -347,25 +375,15 @@ asmlinkage long sys_quotactl(unsigned int cmd, const char __user *special, qid_t
|
||||
{
|
||||
uint cmds, type;
|
||||
struct super_block *sb = NULL;
|
||||
struct block_device *bdev;
|
||||
char *tmp;
|
||||
int ret;
|
||||
|
||||
cmds = cmd >> SUBCMDSHIFT;
|
||||
type = cmd & SUBCMDMASK;
|
||||
|
||||
if (cmds != Q_SYNC || special) {
|
||||
tmp = getname(special);
|
||||
if (IS_ERR(tmp))
|
||||
return PTR_ERR(tmp);
|
||||
bdev = lookup_bdev(tmp);
|
||||
putname(tmp);
|
||||
if (IS_ERR(bdev))
|
||||
return PTR_ERR(bdev);
|
||||
sb = get_super(bdev);
|
||||
bdput(bdev);
|
||||
if (!sb)
|
||||
return -ENODEV;
|
||||
sb = quotactl_block(special);
|
||||
if (IS_ERR(sb))
|
||||
return PTR_ERR(sb);
|
||||
}
|
||||
|
||||
ret = check_quotactl_valid(sb, type, cmds, id);
|
||||
|
||||
@ -571,8 +571,10 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
|
||||
{
|
||||
int retval;
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
if (!(flags & MS_RDONLY) && bdev_read_only(sb->s_bdev))
|
||||
return -EACCES;
|
||||
#endif
|
||||
if (flags & MS_RDONLY)
|
||||
acct_auto_close(sb);
|
||||
shrink_dcache_sb(sb);
|
||||
@ -692,6 +694,7 @@ void kill_litter_super(struct super_block *sb)
|
||||
|
||||
EXPORT_SYMBOL(kill_litter_super);
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
static int set_bdev_super(struct super_block *s, void *data)
|
||||
{
|
||||
s->s_bdev = data;
|
||||
@ -787,6 +790,7 @@ void kill_block_super(struct super_block *sb)
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(kill_block_super);
|
||||
#endif
|
||||
|
||||
int get_sb_nodev(struct file_system_type *fs_type,
|
||||
int flags, void *data,
|
||||
|
||||
@ -1,5 +1,6 @@
|
||||
config XFS_FS
|
||||
tristate "XFS filesystem support"
|
||||
depends on BLOCK
|
||||
help
|
||||
XFS is a high performance journaling filesystem which originated
|
||||
on the SGI IRIX platform. It is completely multi-threaded, can
|
||||
|
||||
@ -16,6 +16,22 @@
|
||||
|
||||
#include <asm/scatterlist.h>
|
||||
|
||||
#ifdef CONFIG_LBD
|
||||
# include <asm/div64.h>
|
||||
# define sector_div(a, b) do_div(a, b)
|
||||
#else
|
||||
# define sector_div(n, b)( \
|
||||
{ \
|
||||
int _res; \
|
||||
_res = (n) % (b); \
|
||||
(n) /= (b); \
|
||||
_res; \
|
||||
} \
|
||||
)
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
struct scsi_ioctl_command;
|
||||
|
||||
struct request_queue;
|
||||
@ -818,24 +834,30 @@ struct work_struct;
|
||||
int kblockd_schedule_work(struct work_struct *work);
|
||||
void kblockd_flush(void);
|
||||
|
||||
#ifdef CONFIG_LBD
|
||||
# include <asm/div64.h>
|
||||
# define sector_div(a, b) do_div(a, b)
|
||||
#else
|
||||
# define sector_div(n, b)( \
|
||||
{ \
|
||||
int _res; \
|
||||
_res = (n) % (b); \
|
||||
(n) /= (b); \
|
||||
_res; \
|
||||
} \
|
||||
)
|
||||
#endif
|
||||
|
||||
#define MODULE_ALIAS_BLOCKDEV(major,minor) \
|
||||
MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))
|
||||
#define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
|
||||
MODULE_ALIAS("block-major-" __stringify(major) "-*")
|
||||
|
||||
|
||||
#else /* CONFIG_BLOCK */
|
||||
/*
|
||||
* stubs for when the block layer is configured out
|
||||
*/
|
||||
#define buffer_heads_over_limit 0
|
||||
|
||||
static inline long blk_congestion_wait(int rw, long timeout)
|
||||
{
|
||||
return timeout;
|
||||
}
|
||||
|
||||
static inline long nr_blockdev_pages(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void exit_io_context(void) {}
|
||||
|
||||
#endif /* CONFIG_BLOCK */
|
||||
|
||||
#endif
|
||||
|
||||
@ -14,6 +14,8 @@
|
||||
#include <linux/wait.h>
|
||||
#include <asm/atomic.h>
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
enum bh_state_bits {
|
||||
BH_Uptodate, /* Contains valid data */
|
||||
BH_Dirty, /* Is dirty */
|
||||
@ -301,4 +303,18 @@ static inline void lock_buffer(struct buffer_head *bh)
|
||||
}
|
||||
|
||||
extern int __set_page_dirty_buffers(struct page *page);
|
||||
|
||||
#else /* CONFIG_BLOCK */
|
||||
|
||||
static inline void buffer_init(void) {}
|
||||
static inline int try_to_free_buffers(struct page *page) { return 1; }
|
||||
static inline int sync_blockdev(struct block_device *bdev) { return 0; }
|
||||
static inline int inode_has_buffers(struct inode *inode) { return 0; }
|
||||
static inline void invalidate_inode_buffers(struct inode *inode) {}
|
||||
static inline int remove_inode_buffers(struct inode *inode) { return 1; }
|
||||
static inline int sync_mapping_buffers(struct address_space *mapping) { return 0; }
|
||||
static inline void invalidate_bdev(struct block_device *bdev, int destroy_dirty_buffers) {}
|
||||
|
||||
|
||||
#endif /* CONFIG_BLOCK */
|
||||
#endif /* _LINUX_BUFFER_HEAD_H */
|
||||
|
||||
@ -90,6 +90,7 @@ COMPATIBLE_IOCTL(FDTWADDLE)
|
||||
COMPATIBLE_IOCTL(FDFMTTRK)
|
||||
COMPATIBLE_IOCTL(FDRAWCMD)
|
||||
/* 0x12 */
|
||||
#ifdef CONFIG_BLOCK
|
||||
COMPATIBLE_IOCTL(BLKRASET)
|
||||
COMPATIBLE_IOCTL(BLKROSET)
|
||||
COMPATIBLE_IOCTL(BLKROGET)
|
||||
@ -103,6 +104,7 @@ COMPATIBLE_IOCTL(BLKTRACESETUP)
|
||||
COMPATIBLE_IOCTL(BLKTRACETEARDOWN)
|
||||
ULONG_IOCTL(BLKRASET)
|
||||
ULONG_IOCTL(BLKFRASET)
|
||||
#endif
|
||||
/* RAID */
|
||||
COMPATIBLE_IOCTL(RAID_VERSION)
|
||||
COMPATIBLE_IOCTL(GET_ARRAY_INFO)
|
||||
|
||||
@ -3,6 +3,8 @@
|
||||
|
||||
#include <linux/percpu.h>
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
typedef int (elevator_merge_fn) (request_queue_t *, struct request **,
|
||||
struct bio *);
|
||||
|
||||
@ -203,4 +205,5 @@ enum {
|
||||
__val; \
|
||||
})
|
||||
|
||||
#endif /* CONFIG_BLOCK */
|
||||
#endif
|
||||
|
||||
@ -1482,6 +1482,7 @@ extern void __init vfs_caches_init(unsigned long);
|
||||
extern void putname(const char *name);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
extern int register_blkdev(unsigned int, const char *);
|
||||
extern int unregister_blkdev(unsigned int, const char *);
|
||||
extern struct block_device *bdget(dev_t);
|
||||
@ -1490,11 +1491,15 @@ extern void bd_forget(struct inode *inode);
|
||||
extern void bdput(struct block_device *);
|
||||
extern struct block_device *open_by_devnum(dev_t, unsigned);
|
||||
extern struct block_device *open_partition_by_devnum(dev_t, unsigned);
|
||||
extern const struct file_operations def_blk_fops;
|
||||
extern const struct address_space_operations def_blk_aops;
|
||||
#else
|
||||
static inline void bd_forget(struct inode *inode) {}
|
||||
#endif
|
||||
extern const struct file_operations def_blk_fops;
|
||||
extern const struct file_operations def_chr_fops;
|
||||
extern const struct file_operations bad_sock_fops;
|
||||
extern const struct file_operations def_fifo_fops;
|
||||
#ifdef CONFIG_BLOCK
|
||||
extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
|
||||
extern int blkdev_ioctl(struct inode *, struct file *, unsigned, unsigned long);
|
||||
extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
|
||||
@ -1510,6 +1515,7 @@ extern void bd_release_from_disk(struct block_device *, struct gendisk *);
|
||||
#define bd_claim_by_disk(bdev, holder, disk) bd_claim(bdev, holder)
|
||||
#define bd_release_from_disk(bdev, disk) bd_release(bdev)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* fs/char_dev.c */
|
||||
#define CHRDEV_MAJOR_HASH_SIZE 255
|
||||
@ -1523,14 +1529,19 @@ extern int chrdev_open(struct inode *, struct file *);
|
||||
extern void chrdev_show(struct seq_file *,off_t);
|
||||
|
||||
/* fs/block_dev.c */
|
||||
#define BLKDEV_MAJOR_HASH_SIZE 255
|
||||
#define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
#define BLKDEV_MAJOR_HASH_SIZE 255
|
||||
extern const char *__bdevname(dev_t, char *buffer);
|
||||
extern const char *bdevname(struct block_device *bdev, char *buffer);
|
||||
extern struct block_device *lookup_bdev(const char *);
|
||||
extern struct block_device *open_bdev_excl(const char *, int, void *);
|
||||
extern void close_bdev_excl(struct block_device *);
|
||||
extern void blkdev_show(struct seq_file *,off_t);
|
||||
#else
|
||||
#define BLKDEV_MAJOR_HASH_SIZE 0
|
||||
#endif
|
||||
|
||||
extern void init_special_inode(struct inode *, umode_t, dev_t);
|
||||
|
||||
@ -1544,6 +1555,7 @@ extern const struct file_operations rdwr_fifo_fops;
|
||||
|
||||
extern int fs_may_remount_ro(struct super_block *);
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
/*
|
||||
* return READ, READA, or WRITE
|
||||
*/
|
||||
@ -1555,9 +1567,10 @@ extern int fs_may_remount_ro(struct super_block *);
|
||||
#define bio_data_dir(bio) ((bio)->bi_rw & 1)
|
||||
|
||||
extern int check_disk_change(struct block_device *);
|
||||
extern int invalidate_inodes(struct super_block *);
|
||||
extern int __invalidate_device(struct block_device *);
|
||||
extern int invalidate_partition(struct gendisk *, int);
|
||||
#endif
|
||||
extern int invalidate_inodes(struct super_block *);
|
||||
unsigned long invalidate_mapping_pages(struct address_space *mapping,
|
||||
pgoff_t start, pgoff_t end);
|
||||
unsigned long invalidate_inode_pages(struct address_space *mapping);
|
||||
@ -1590,7 +1603,9 @@ extern void emergency_sync(void);
|
||||
extern void emergency_remount(void);
|
||||
extern int do_remount_sb(struct super_block *sb, int flags,
|
||||
void *data, int force);
|
||||
#ifdef CONFIG_BLOCK
|
||||
extern sector_t bmap(struct inode *, sector_t);
|
||||
#endif
|
||||
extern int notify_change(struct dentry *, struct iattr *);
|
||||
extern int permission(struct inode *, int, struct nameidata *);
|
||||
extern int generic_permission(struct inode *, int,
|
||||
@ -1673,9 +1688,11 @@ static inline void insert_inode_hash(struct inode *inode) {
|
||||
extern struct file * get_empty_filp(void);
|
||||
extern void file_move(struct file *f, struct list_head *list);
|
||||
extern void file_kill(struct file *f);
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct bio;
|
||||
extern void submit_bio(int, struct bio *);
|
||||
extern int bdev_read_only(struct block_device *);
|
||||
#endif
|
||||
extern int set_blocksize(struct block_device *, int);
|
||||
extern int sb_set_blocksize(struct super_block *, int);
|
||||
extern int sb_min_blocksize(struct super_block *, int);
|
||||
@ -1756,6 +1773,7 @@ static inline void do_generic_file_read(struct file * filp, loff_t *ppos,
|
||||
actor);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
|
||||
struct block_device *bdev, const struct iovec *iov, loff_t offset,
|
||||
unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
|
||||
@ -1793,6 +1811,7 @@ static inline ssize_t blockdev_direct_IO_own_locking(int rw, struct kiocb *iocb,
|
||||
return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
|
||||
nr_segs, get_block, end_io, DIO_OWN_LOCKING);
|
||||
}
|
||||
#endif
|
||||
|
||||
extern const struct file_operations generic_ro_fops;
|
||||
|
||||
|
||||
@ -11,6 +11,8 @@
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
enum {
|
||||
/* These three have identical behaviour; use the second one if DOS FDISK gets
|
||||
confused about extended/logical partitions starting past cylinder 1023. */
|
||||
@ -420,3 +422,5 @@ static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
@ -9,6 +9,7 @@
|
||||
* (And no, it doesn't do the #ifdef __MPAGE_H thing, and it doesn't do
|
||||
* nested includes. Get it right in the .c file).
|
||||
*/
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
struct writeback_control;
|
||||
typedef int (writepage_t)(struct page *page, struct writeback_control *wbc);
|
||||
@ -20,3 +21,5 @@ int mpage_writepages(struct address_space *mapping,
|
||||
struct writeback_control *wbc, get_block_t get_block);
|
||||
int mpage_writepage(struct page *page, get_block_t *get_block,
|
||||
struct writeback_control *wbc);
|
||||
|
||||
#endif
|
||||
|
||||
@ -53,6 +53,8 @@
|
||||
#include <linux/raid/md_u.h>
|
||||
#include <linux/raid/md_k.h>
|
||||
|
||||
#ifdef CONFIG_MD
|
||||
|
||||
/*
|
||||
* Different major versions are not compatible.
|
||||
* Different minor versions are only downward compatible.
|
||||
@ -95,5 +97,6 @@ extern void md_new_event(mddev_t *mddev);
|
||||
|
||||
extern void md_update_sb(mddev_t * mddev);
|
||||
|
||||
#endif /* CONFIG_MD */
|
||||
#endif
|
||||
|
||||
|
||||
@ -18,6 +18,8 @@
|
||||
/* and dm-bio-list.h is not under include/linux because.... ??? */
|
||||
#include "../../../drivers/md/dm-bio-list.h"
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
#define LEVEL_MULTIPATH (-4)
|
||||
#define LEVEL_LINEAR (-1)
|
||||
#define LEVEL_FAULTY (-5)
|
||||
@ -362,5 +364,6 @@ static inline void safe_put_page(struct page *p)
|
||||
if (p) put_page(p);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_BLOCK */
|
||||
#endif
|
||||
|
||||
|
||||
@ -6,7 +6,6 @@
|
||||
#include <scsi/scsi_device.h>
|
||||
#include <scsi/scsi_host.h>
|
||||
|
||||
|
||||
#define MSG_SIMPLE_TAG 0x20
|
||||
#define MSG_HEAD_TAG 0x21
|
||||
#define MSG_ORDERED_TAG 0x22
|
||||
@ -14,6 +13,7 @@
|
||||
#define SCSI_NO_TAG (-1) /* identify no tag in use */
|
||||
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
/**
|
||||
* scsi_get_tag_type - get the type of tag the device supports
|
||||
@ -144,4 +144,5 @@ static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth)
|
||||
return shost->bqt ? 0 : -ENOMEM;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_BLOCK */
|
||||
#endif /* _SCSI_SCSI_TCQ_H */
|
||||
|
||||
@ -92,7 +92,7 @@ config LOCALVERSION_AUTO
|
||||
|
||||
config SWAP
|
||||
bool "Support for paging of anonymous memory (swap)"
|
||||
depends on MMU
|
||||
depends on MMU && BLOCK
|
||||
default y
|
||||
help
|
||||
This option allows you to choose whether you want to have support
|
||||
|
||||
@ -285,7 +285,11 @@ void __init mount_block_root(char *name, int flags)
|
||||
{
|
||||
char *fs_names = __getname();
|
||||
char *p;
|
||||
#ifdef CONFIG_BLOCK
|
||||
char b[BDEVNAME_SIZE];
|
||||
#else
|
||||
const char *b = name;
|
||||
#endif
|
||||
|
||||
get_fs_names(fs_names);
|
||||
retry:
|
||||
@ -304,7 +308,9 @@ void __init mount_block_root(char *name, int flags)
|
||||
* Allow the user to distinguish between failed sys_open
|
||||
* and bad superblock on root device.
|
||||
*/
|
||||
#ifdef CONFIG_BLOCK
|
||||
__bdevname(ROOT_DEV, b);
|
||||
#endif
|
||||
printk("VFS: Cannot open root device \"%s\" or %s\n",
|
||||
root_device_name, b);
|
||||
printk("Please append a correct \"root=\" boot option\n");
|
||||
@ -316,7 +322,10 @@ void __init mount_block_root(char *name, int flags)
|
||||
for (p = fs_names; *p; p += strlen(p)+1)
|
||||
printk(" %s", p);
|
||||
printk("\n");
|
||||
panic("VFS: Unable to mount root fs on %s", __bdevname(ROOT_DEV, b));
|
||||
#ifdef CONFIG_BLOCK
|
||||
__bdevname(ROOT_DEV, b);
|
||||
#endif
|
||||
panic("VFS: Unable to mount root fs on %s", b);
|
||||
out:
|
||||
putname(fs_names);
|
||||
}
|
||||
@ -387,8 +396,10 @@ void __init mount_root(void)
|
||||
change_floppy("root floppy");
|
||||
}
|
||||
#endif
|
||||
#ifdef CONFIG_BLOCK
|
||||
create_dev("/dev/root", ROOT_DEV);
|
||||
mount_block_root("/dev/root", root_mountflags);
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
@ -134,3 +134,8 @@ cond_syscall(sys_madvise);
|
||||
cond_syscall(sys_mremap);
|
||||
cond_syscall(sys_remap_file_pages);
|
||||
cond_syscall(compat_sys_move_pages);
|
||||
|
||||
/* block-layer dependent */
|
||||
cond_syscall(sys_bdflush);
|
||||
cond_syscall(sys_ioprio_set);
|
||||
cond_syscall(sys_ioprio_get);
|
||||
|
||||
@ -12,7 +12,7 @@ obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
|
||||
readahead.o swap.o truncate.o vmscan.o \
|
||||
prio_tree.o util.o mmzone.o vmstat.o $(mmu-y)
|
||||
|
||||
ifeq ($(CONFIG_MMU),y)
|
||||
ifeq ($(CONFIG_MMU)$(CONFIG_BLOCK),yy)
|
||||
obj-y += bounce.o
|
||||
endif
|
||||
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o thrash.o
|
||||
|
||||
@ -2020,6 +2020,7 @@ inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count, i
|
||||
if (unlikely(*pos + *count > inode->i_sb->s_maxbytes))
|
||||
*count = inode->i_sb->s_maxbytes - *pos;
|
||||
} else {
|
||||
#ifdef CONFIG_BLOCK
|
||||
loff_t isize;
|
||||
if (bdev_read_only(I_BDEV(inode)))
|
||||
return -EPERM;
|
||||
@ -2031,6 +2032,9 @@ inline int generic_write_checks(struct file *file, loff_t *pos, size_t *count, i
|
||||
|
||||
if (*pos + *count > isize)
|
||||
*count = isize - *pos;
|
||||
#else
|
||||
return -EPERM;
|
||||
#endif
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -409,6 +409,7 @@ int migrate_page(struct address_space *mapping,
|
||||
}
|
||||
EXPORT_SYMBOL(migrate_page);
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
/*
|
||||
* Migration function for pages with buffers. This function can only be used
|
||||
* if the underlying filesystem guarantees that no other references to "page"
|
||||
@ -466,6 +467,7 @@ int buffer_migrate_page(struct address_space *mapping,
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(buffer_migrate_page);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Writeback a page to clean the dirty state
|
||||
|
||||
@ -807,9 +807,11 @@ int fastcall set_page_dirty(struct page *page)
|
||||
|
||||
if (likely(mapping)) {
|
||||
int (*spd)(struct page *) = mapping->a_ops->set_page_dirty;
|
||||
if (spd)
|
||||
return (*spd)(page);
|
||||
return __set_page_dirty_buffers(page);
|
||||
#ifdef CONFIG_BLOCK
|
||||
if (!spd)
|
||||
spd = __set_page_dirty_buffers;
|
||||
#endif
|
||||
return (*spd)(page);
|
||||
}
|
||||
if (!PageDirty(page)) {
|
||||
if (!TestSetPageDirty(page))
|
||||
|
||||
@ -35,8 +35,10 @@ void do_invalidatepage(struct page *page, unsigned long offset)
|
||||
{
|
||||
void (*invalidatepage)(struct page *, unsigned long);
|
||||
invalidatepage = page->mapping->a_ops->invalidatepage;
|
||||
#ifdef CONFIG_BLOCK
|
||||
if (!invalidatepage)
|
||||
invalidatepage = block_invalidatepage;
|
||||
#endif
|
||||
if (invalidatepage)
|
||||
(*invalidatepage)(page, offset);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user