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2009-04-01loop: add ioctl to resize a loop deviceJ. R. Okajima
Add the ability to 'resize' the loop device on the fly. One practical application is a loop file with XFS filesystem, already mounted: You can easily enlarge the file (append some bytes) and then call ioctl(fd, LOOP_SET_CAPACITY, new); The loop driver will learn about the new size and you can use xfs_growfs later on, which will allow you to use full capacity of the loop file without the need to unmount. Test app: #include <linux/fs.h> #include <linux/loop.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <sys/types.h> #include <assert.h> #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #define _GNU_SOURCE #include <getopt.h> char *me; void usage(FILE *f) { fprintf(f, "%s [options] loop_dev [backend_file]\n" "-s, --set new_size_in_bytes\n" "\twhen backend_file is given, " "it will be expanded too while keeping the original contents\n", me); } struct option opts[] = { { .name = "set", .has_arg = 1, .flag = NULL, .val = 's' }, { .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' } }; void err_size(char *name, __u64 old) { fprintf(stderr, "size must be larger than current %s (%llu)\n", name, old); } int main(int argc, char *argv[]) { int fd, err, c, i, bfd; ssize_t ssz; size_t sz; __u64 old, new, append; char a[BUFSIZ]; struct stat st; FILE *out; char *backend, *dev; err = EINVAL; out = stderr; me = argv[0]; new = 0; while ((c = getopt_long(argc, argv, "s:h", opts, &i)) != -1) { switch (c) { case 's': errno = 0; new = strtoull(optarg, NULL, 0); if (errno) { err = errno; perror(argv[i]); goto out; } break; case 'h': err = 0; out = stdout; goto err; default: perror(argv[i]); goto err; } } if (optind < argc) dev = argv[optind++]; else goto err; fd = open(dev, O_RDONLY); if (fd < 0) { err = errno; perror(dev); goto out; } err = ioctl(fd, BLKGETSIZE64, &old); if (err) { err = errno; perror("ioctl BLKGETSIZE64"); goto out; } if (!new) { printf("%llu\n", old); goto out; } if (new < old) { err = EINVAL; err_size(dev, old); goto out; } if (optind < argc) { backend = argv[optind++]; bfd = open(backend, O_WRONLY|O_APPEND); if (bfd < 0) { err = errno; perror(backend); goto out; } err = fstat(bfd, &st); if (err) { err = errno; perror(backend); goto out; } if (new < st.st_size) { err = EINVAL; err_size(backend, st.st_size); goto out; } append = new - st.st_size; sz = sizeof(a); while (append > 0) { if (append < sz) sz = append; ssz = write(bfd, a, sz); if (ssz != sz) { err = errno; perror(backend); goto out; } append -= sz; } err = fsync(bfd); if (err) { err = errno; perror(backend); goto out; } } err = ioctl(fd, LOOP_SET_CAPACITY, new); if (err) { err = errno; perror("ioctl LOOP_SET_CAPACITY"); } goto out; err: usage(out); out: return err; } Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp> Signed-off-by: Tomas Matejicek <tomas@slax.org> Cc: <util-linux-ng@vger.kernel.org> Cc: Karel Zak <kzak@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: <linux-api@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-31proc 2/2: remove struct proc_dir_entry::ownerAlexey Dobriyan
Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy as correctly noted at bug #12454. Someone can lookup entry with NULL ->owner, thus not pinning enything, and release it later resulting in module refcount underflow. We can keep ->owner and supply it at registration time like ->proc_fops and ->data. But this leaves ->owner as easy-manipulative field (just one C assignment) and somebody will forget to unpin previous/pin current module when switching ->owner. ->proc_fops is declared as "const" which should give some thoughts. ->read_proc/->write_proc were just fixed to not require ->owner for protection. rmmod'ed directories will be empty and return "." and ".." -- no harm. And directories with tricky enough readdir and lookup shouldn't be modular. We definitely don't want such modular code. Removing ->owner will also make PDE smaller. So, let's nuke it. Kudos to Jeff Layton for reminding about this, let's say, oversight. http://bugzilla.kernel.org/show_bug.cgi?id=12454 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-03-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: irq_node.handler() should return irqreturn_t m68k: section mismatch fixes: Atari SCSI m68k: section mismatch fixes: DMAsound for Atari MAINTAINERS: Replace dead link to m68k CVS repository by link to new git repository m68k: mac - Add SWIM floppy support m68k: mac - Add a new entry in mac_model to identify the floppy controller type. m68k: Add install target
2009-03-26Merge branch 'for-2.6.30' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-2.6.30' of git://git.kernel.dk/linux-2.6-block: Get rid of pdflush_operation() in emergency sync and remount btrfs: get rid of current_is_pdflush() in btrfs_btree_balance_dirty Move the default_backing_dev_info out of readahead.c and into backing-dev.c block: Repeated lines in switching-sched.txt bsg: Remove bogus check against request_queue->max_sectors block: WARN in __blk_put_request() for potential bio leak loop: fix circular locking in loop_clr_fd() loop: support barrier writes bsg: add support for tail queuing cpqarray: enable bus mastering block: genhd.h cleanup patch block: add private bio_set for bio integrity allocations block: genhd.h comment needs updating block: get rid of unused blkdev_free_rq() define block: remove various blk_queue_*() setting functions in blk_init_queue_node() cciss: add BUILD_BUG_ON() for catching bad CommandList_struct alignment block: don't create bio_vec slabs of less than the inline number block: cleanup bio_alloc_bioset()
2009-03-26Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
Conflicts: drivers/net/wimax/i2400m/usb-notif.c
2009-03-26m68k: mac - Add SWIM floppy supportLaurent Vivier
It allows to read data from a floppy, but not to write to, and to eject the floppy (useful on our Mac without eject button). Signed-off-by: Laurent Vivier <Laurent@lvivier.info> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-03-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (97 commits) USB: qcserial: add device id for HP devices USB: isp1760: Add a delay before reading the SKIPMAP registers in isp1760-hcd.c USB: allow malformed LANGID descriptors USB: pxa27x_udc: typo fixes and code cleanups USB: gadget: gadget zero uses new suspend/resume hooks USB: gadget: composite device-level suspend/resume hooks USB: r8a66597-hcd: suspend/resume support USB: more u32 conversion after transfer_buffer_length and actual_length USB: Fix cp2101 USB serial device driver termios functions for console use USB: CP2101 New Device ID USB: ipaq: handle 4 endpoint devices USB: S3C: Move usb-control.h to platform include USB: ohci-hcd: Add ARCH_S3C24XX to the ohci-s3c2410.c glue USB: pedantic: spelling correction in comment for ch9.h USB: host: fix sparse warning: Using plain integer as NULL pointer USB: ohci-s3c2410: fix name of bus clock USB: ohci-s3c2410: remove <mach/hardware.h> include USB: serial: rename cp2101 driver to cp210x USB: CP2101 Reduce Error Logging USB: CP2101 Support AN205 baud rates ...
2009-03-26loop: fix circular locking in loop_clr_fd()Nikanth Karthikesan
With CONFIG_PROVE_LOCKING enabled $ losetup /dev/loop0 file $ losetup -o 32256 /dev/loop1 /dev/loop0 $ losetup -d /dev/loop1 $ losetup -d /dev/loop0 triggers a [ INFO: possible circular locking dependency detected ] I think this warning is a false positive. Open/close on a loop device acquires bd_mutex of the device before acquiring lo_ctl_mutex of the same device. For ioctl(LOOP_CLR_FD) after acquiring lo_ctl_mutex, fput on the backing_file might acquire the bd_mutex of a device, if backing file is a device and this is the last reference to the file being dropped . But it is guaranteed that it is impossible to have a circular list of backing devices.(say loop2->loop1->loop0->loop2 is not possible), which guarantees that this can never deadlock. So this warning should be suppressed. It is very difficult to annotate lockdep not to warn here in the correct way. A simple way to silence lockdep could be to mark the lo_ctl_mutex in ioctl to be a sub class, but this might mask some other real bugs. @@ -1164,7 +1164,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode, struct loop_device *lo = bdev->bd_disk->private_data; int err; - mutex_lock(&lo->lo_ctl_mutex); + mutex_lock_nested(&lo->lo_ctl_mutex, 1); switch (cmd) { case LOOP_SET_FD: err = loop_set_fd(lo, mode, bdev, arg); Or actually marking the bd_mutex after lo_ctl_mutex as a sub class could be a better solution. Luckily it is easy to avoid calling fput on backing file with lo_ctl_mutex held, so no lockdep annotation is required. If you do not like the special handling of the lo_ctl_mutex just for the LOOP_CLR_FD ioctl in lo_ioctl(), the mutex handling could be moved inside each of the individual ioctl handlers and I could send you another patch. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-24platform: make better use of to_platform_{device,driver}() macrosEric Miao
This helps the code look more consistent and cleaner. Signed-off-by: Eric Miao <eric.miao@marvell.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24usb-storage: prepare for subdriver separationAlan Stern
This patch (as1206) is the first step in converting usb-storage's subdrivers into separate modules. It makes the following large-scale changes: Remove a bunch of unnecessary #ifdef's from usb_usual.h. Not truly necessary, but it does clean things up. Move the USB device-ID table (which is duplicated between libusual and usb-storage) into its own source file, usual-tables.c, and arrange for this to be linked with either libusual or usb-storage according to whether USB_LIBUSUAL is configured. Add to usual-tables.c a new usb_usual_ignore_device() function to detect whether a particular device needs to be managed by a subdriver and not by the standard handlers in usb-storage. Export a whole bunch of functions in usb-storage, renaming some of them because their names don't already begin with "usb_stor_". These functions will be needed by the new subdriver modules. Split usb-storage's probe routine into two functions. The subdrivers will call the probe1 routine, then fill in their transport and protocol settings, and then call the probe2 routine. Take the default cases and error checking out of get_transport() and get_protocol(), which run during probe1, and instead put a check for invalid transport or protocol values into the probe2 function. Add a new probe routine to be used for standard devices, i.e., those that don't need a subdriver. This new routine checks whether the device should be ignored (because it should be handled by ub or by a subdriver), and if not, calls the probe1 and probe2 functions. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24USB: ub: use USB API functions rather than constantsJulia Lawall
This set of patches introduces calls to the following set of functions: usb_endpoint_dir_in(epd) usb_endpoint_dir_out(epd) usb_endpoint_is_bulk_in(epd) usb_endpoint_is_bulk_out(epd) usb_endpoint_is_int_in(epd) usb_endpoint_is_int_out(epd) usb_endpoint_num(epd) usb_endpoint_type(epd) usb_endpoint_xfer_bulk(epd) usb_endpoint_xfer_control(epd) usb_endpoint_xfer_int(epd) usb_endpoint_xfer_isoc(epd) In some cases, introducing one of these functions is not possible, and it just replaces an explicit integer value by one of the following constants: USB_ENDPOINT_XFER_BULK USB_ENDPOINT_XFER_CONTROL USB_ENDPOINT_XFER_INT USB_ENDPOINT_XFER_ISOC An extract of the semantic patch that makes these changes is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r1@ struct usb_endpoint_descriptor *epd; @@ - ((epd->bmAttributes & \(USB_ENDPOINT_XFERTYPE_MASK\|3\)) == - \(USB_ENDPOINT_XFER_CONTROL\|0\)) + usb_endpoint_xfer_control(epd) @r5@ struct usb_endpoint_descriptor *epd; @@ - ((epd->bEndpointAddress & \(USB_ENDPOINT_DIR_MASK\|0x80\)) == - \(USB_DIR_IN\|0x80\)) + usb_endpoint_dir_in(epd) @inc@ @@ #include <linux/usb.h> @depends on !inc && (r1||r5)@ @@ + #include <linux/usb.h> #include <linux/usb/...> // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24loop: support barrier writesNikanth Karthikesan
Honour barrier requests in the loop back block device driver. In case of barrier bios, flush the backing file once before processing the barrier and once after to guarantee ordering. In case of filesystems that does not support fsync, barrier bios would be failed with -EOPNOTSUPP. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-24cpqarray: enable bus masteringDave Jones
We've been carrying this patch for the last 3 years in Fedora, long past time we got it upstream... Call pci_set_master to enable bus-mastering if the BIOS hasn't done it already. Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-24cciss: add BUILD_BUG_ON() for catching bad CommandList_struct alignmentJens Axboe
The hardware requires 64-bit alignment of commands, so add a build bug check for that. The recent commit 8a3173de4ab4cdacc43675dc5c077f9a5bf17f5f didn't change the size of the command, but other additions/changes may and thus break badly at runtime. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-18Merge commit 'gcl/merge' into mergeBenjamin Herrenschmidt
2009-03-14Fix Xilinx SystemACE driver to handle empty CF slotGrant Likely
The SystemACE driver does not handle an empty CF slot gracefully. An empty CF slot ends up hanging the system. This patch adds a check for the CF state and stops trying to process requests if the slot is empty. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-13ps3/block: Replace mtd/ps3vram by block/ps3vramGeert Uytterhoeven
Convert the PS3 Video RAM Storage Driver from an MTD driver to a plain block device driver. The ps3vram driver exposes unused video RAM on the PS3 as a block device suitable for storage or swap. Fast data transfer is achieved using a local cache in system RAM and DMA transfers via the GPU. The new driver is ca. 50% faster for reading, and ca. 10% for writing. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-03-10net: convert usage of packet_type to read_mostlyStephen Hemminger
Protocols that use packet_type can be __read_mostly section for better locality. Elminate any unnecessary initializations of NULL. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (29 commits) p54: fix race condition in memory management cfg80211: test before subtraction on unsigned iwlwifi: fix error flow in iwl*_pci_probe rt2x00 : more devices to rt73usb.c rt2x00 : more devices to rt2500usb.c bonding: Fix device passed into ->ndo_neigh_setup(). vlan: Fix vlan-in-vlan crashes. net: Fix missing dev->neigh_setup in register_netdevice(). tmspci: fix request_irq race pkt_sched: act_police: Fix a rate estimator test. tg3: Fix 5906 link problems SCTP: change sctp_ctl_sock_init() to try IPv4 if IPv6 fails IPv6: add "disable" module parameter support to ipv6.ko sungem: another error printed one too early aoe: error printed 1 too early net pcmcia: worklimit reaches -1 net: more timeouts that reach -1 net: fix tokenring license dm9601: new vendor/product IDs netlink: invert error code in netlink_set_err() ...
2009-03-05loop: don't increment p->offset with (size_t) -EINVALRoel Kluin
Upon a 'transfer error block' size is set to -EINVAL, but this becomes positive since size is unsigned: p->offset still gets incremented. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-05cciss: remove 30 second initial timeout on controller resetJens Axboe
Commit 5e4c91c84b194b26cf592779e451f4b5be777cba forgot to remove the initial sleep, get rid of it. Thanks to Randy Dunlap <randy.dunlap@oracle.com> for spotting this error. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-03-05Fix kernel NULL pointer dereference in xen-blkfrontKris Shannon
When booting Xen Dom0 on a pre-release 3.2.1 hypervisor the system Oopses on a "Unable to handle kernel NULL pointer dereference" in xenwatch. From the backtrace it looks like backend_changed is calling bdget_disk with a NULL pointer. Checking for NULL and returning ENODEV instead allows the kernel to boot.
2009-03-04aoe: error printed 1 too earlyRoel Kluin
with while (i-- > 0); i reaches -1 after the loop, so the test below is printed one too early: 0 still means success. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-26xen/blkfront: use blk_rq_map_sg to generate ring entriesJens Axboe
On occasion, the request will apparently have more segments than we fit into the ring. Jens says: > The second problem is that the block layer then appears to create one > too many segments, but from the dump it has rq->nr_phys_segments == > BLKIF_MAX_SEGMENTS_PER_REQUEST. I suspect the latter is due to > xen-blkfront not handling the merging on its own. It should check that > the new page doesn't form part of the previous page. The > rq_for_each_segment() iterates all single bits in the request, not dma > segments. The "easiest" way to do this is to call blk_rq_map_sg() and > then iterate the mapped sg list. That will give you what you are > looking for. > Here's a test patch, compiles but otherwise untested. I spent more > time figuring out how to enable XEN than to code it up, so YMMV! > Probably the sg list wants to be put inside the ring and only > initialized on allocation, then you can get rid of the sg on stack and > sg_init_table() loop call in the function. I'll leave that, and the > testing, to you. [Moved sg array into info structure, and initialize once. -J] Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-02-26cciss: shorten 30s timeout on controller resetJens Axboe
If reset_devices is set for kexec, then cciss will delay 30 seconds since the old 5i controller _may_ need that long to recover. Replace the long sleep with incremental sleep and tests to reduce the 30 seconds to worst case for 5i, so that other controllers will proceed quickly. Reviewed-by: Mike Miller <mike.miller@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-02-22m68k: atari - Rename "mfp" to "st_mfp"Geert Uytterhoeven
http://kisskb.ellerman.id.au/kisskb/buildresult/72115/: | net/mac80211/ieee80211_i.h:327: error: syntax error before 'volatile' | net/mac80211/ieee80211_i.h:350: error: syntax error before '}' token | net/mac80211/ieee80211_i.h:455: error: field 'sta' has incomplete type | distcc[19430] ERROR: compile net/mac80211/main.c on sprygo/32 failed This is caused by | # define mfp ((*(volatile struct MFP*)MFP_BAS)) in arch/m68k/include/asm/atarihw.h, which conflicts with the new "mfp" enum in net/mac80211/ieee80211_i.h. Rename "mfp" to "st_mfp", as it's a way too generic name for a global #define. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-02-18Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: fix deadlock in blk_abort_queue() for drivers that readd to timeout list block: fix booting from partitioned md array block: revert part of 18ce3751ccd488c78d3827e9f6bf54e6322676fb cciss: PCI power management reset for kexec paride/pg.c: xs(): &&/|| confusion fs/bio: bio_alloc_bioset: pass right object ptr to mempool_free block: fix bad definition of BIO_RW_SYNC bsg: Fix sense buffer bug in SG_IO
2009-02-18floppy: request and release only the ports we actually usePhilippe De Muyter
The floppy driver requests an I/O port it doesn't need, and sometimes this causes a conflict with a motherboard device reported by PNPBIOS. This patch makes the floppy driver request and release only the ports it actually uses. It also factors out the request/release stuff and the io-ports list so they're all in one place now. The current floppy driver uses only these ports: 0x3f2 (FD_DOR) 0x3f4 (FD_STATUS) 0x3f5 (FD_DATA) 0x3f7 (FD_DCR/FD_DIR) but it requests 0x3f2-0x3f5 and 0x3f7, which includes the unused port 0x3f3. Some BIOSes report 0x3f3 as a motherboard resource. The PNP system driver reserves that, which causes a conflict when the floppy driver requests 0x3f2-0x3f5 later. Philippe reported that this conflict broke the floppy driver between 2.6.11 and 2.6.22. His PNPBIOS reports these devices: $ cat 00:07/id 00:07/resources # motherboard device PNP0c02 state = active io 0x80-0x80 io 0x10-0x1f io 0x22-0x3f io 0x44-0x5f io 0x90-0x9f io 0xa2-0xbf io 0x3f0-0x3f1 io 0x3f3-0x3f3 $ cat 00:03/id 00:03/resources # floppy device PNP0700 state = active io 0x3f4-0x3f5 io 0x3f2-0x3f2 Reference: http://lkml.org/lkml/2009/1/31/162 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Philippe De Muyter <phdm@macqel.be> Reported-by: Philippe De Muyter <phdm@macqel.be> Tested-by: Philippe De Muyter <phdm@macqel.be> Cc: Adam M Belay <abelay@mit.edu> Cc: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-02-18aoe: ignore vendor extension AoE responsesEd Cashin
The Welland ME-747K-SI AoE target generates unsolicited AoE responses that are marked as vendor extensions. Instead of ignoring these packets, the aoe driver was generating kernel messages for each unrecognized response received. This patch corrects the behavior. Signed-off-by: Ed Cashin <ecashin@coraid.com> Reported-by: <karaluh@karaluh.pl> Tested-by: <karaluh@karaluh.pl> Cc: <stable@kernel.org> Cc: Alex Buell <alex.buell@munted.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-02-18cciss: PCI power management reset for kexecChip Coldwell
The kexec kernel resets the CCISS hardware in three steps: 1. Use PCI power management states to reset the controller in the kexec kernel. 2. Clear the MSI/MSI-X bits in PCI configuration space so that MSI initialization in the kexec kernel doesn't fail. 3. Use the CCISS "No-op" message to determine when the controller firmware has recovered from the PCI PM reset. [akpm@linux-foundation.org: cleanups] Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-02-18paride/pg.c: xs(): &&/|| confusionRoel Kluin
&&/|| confusion Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-02-11nbd: fix I/O hang on disconnected nbdsPaul Clements
Fix a problem that causes I/O to a disconnected (or partially initialized) nbd device to hang indefinitely. To reproduce: # ioctl NBD_SET_SIZE_BLOCKS /dev/nbd23 514048 # dd if=/dev/nbd23 of=/dev/null bs=4096 count=1 ...hangs... This can also occur when an nbd device loses its nbd-client/server connection. Although we clear the queue of any outstanding I/Os after the client/server connection fails, any additional I/Os that get queued later will hang. This bug may also be the problem reported in this bug report: http://bugzilla.kernel.org/show_bug.cgi?id=12277 Testing would need to be performed to determine if the two issues are the same. This problem was introduced by the new request handling thread code ("NBD: allow nbd to be used locally", 3/2008), which entered into mainline around 2.6.25. The fix, which is fairly simple, is to restore the check for lo->sock being NULL in do_nbd_request. This causes I/O to an uninitialized nbd to immediately fail with an I/O error, as it did prior to the introduction of this bug. Signed-off-by: Paul Clements <paul.clements@steeleye.com> Reported-by: Jon Nelson <jnelson-kernel-bugzilla@jamponi.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: <stable@kernel.org> [2.6.26.x, 2.6.27.x, 2.6.28.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-16powerpc/ps3: Printing fixups for l64 to ll64 conversion drivers/blockStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-01-15nbd: do not allow two clients at the same timePavel Machek
Two nbd-clients at same time are bad idea, and cause WARN_ON from nbd in 2.6.28-rc7 from sysfs_add_one. This simply prevents that from happening. To reproduce: cat /dev/zero | head -c 10000000 > /tmp/delme.fstest.fs nbd-server 9100 -l /anyone.can.connect > /tmp/delme.fstest.fs & sleep 1 nbd-client localhost 9100 /dev/nd0 & nbd-client localhost 9100 /dev/nd0 & Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Paul Clements <paul.clements@steeleye.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-13Merge commit 'gcl/gcl-next' into nextBenjamin Herrenschmidt
2009-01-12m68k: amiflop - Get rid of sleep_on callsAndreas Bombe
Apart from sleep_on() calls that could be easily converted to wait_event() and completion calls amiflop also used a flag in ms_delay() and ms_isr() as a custom mutex for ms_delay() without a need for explicit unlocking. I converted that to a standard mutex. The replacement for the unconditional sleep_on() in fd_motor_on() is a complete_all() together with a INIT_COMPLETION() before the mod_timer() call. It appears to me that fd_motor_on() might be called concurrently and fd_select() does not guarantee mutual exclusivity in the case the same drive gets selected again. Signed-off-by: Andreas Bombe <aeb@debian.org> Acked-by: Jörg Dorchain <joerg@dorchain.net> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-01-09powerpc/xsysace: add compatible string for non-ipcore instanceYuri Tikhonov
Add "xlnx,sysace" compatible string to the of_platform binding table. Platforms which have the SysACE chip on board (e.g. Katmai) instead of via a Xilinx generated IP core will use this value in their device tree. Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-01-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Work around branch tracer warning. sparc64: Fix unsigned long long warnings in drivers. sparc64: Use unsigned long long for u64. sparc: refactor code in fault_32.c sparc64: refactor code in init_64.c sparc64: refactor code in viohs.c sparc: make proces_ver_nack a bit more readable
2009-01-07USB: change interface to usb_lock_device_for_reset()Alan Stern
This patch (as1161) changes the interface to usb_lock_device_for_reset(). The existing interface is apparently not very clear, judging from the fact that several of its callers don't use it correctly. The new interface always returns 0 for success and it always requires the caller to unlock the device afterward. The new routine will not return immediately if it is called while the driver's probe method is running. Instead it will wait until the probe is over and the device has been unlocked. This shouldn't cause any problems; I don't know of any cases where drivers call usb_lock_device_for_reset() during probe. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-06sparc64: Fix unsigned long long warnings in drivers.Sam Ravnborg
Fix warnings caused by the unsigned long long usage in sparc specific drivers. The drivers were considered sparc specific more or less from the filename alone. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: lguest: struct device - replace bus_id with dev_name() lguest: move the initial guest page table creation code to the host kvm-s390: implement config_changed for virtio on s390 virtio_console: support console resizing virtio: add PCI device release() function virtio_blk: fix type warning virtio: block: dynamic maximum segments virtio: set max_segment_size and max_sectors to infinite. virtio: avoid implicit use of Linux page size in balloon interface virtio: hand virtio ring alignment as argument to vring_new_virtqueue virtio: use KVM_S390_VIRTIO_RING_ALIGN instead of relying on pagesize virtio: use LGUEST_VRING_ALIGN instead of relying on pagesize virtio: Don't use PAGE_SIZE for vring alignment in virtio_pci. virtio: rename 'pagesize' arg to vring_init/vring_size virtio: Don't use PAGE_SIZE in virtio_pci.c virtio: struct device - replace bus_id with dev_name(), dev_set_name() virtio-pci queue allocation not page-aligned
2008-12-30virtio_blk: fix type warningRandy Dunlap
Fix parameter type warning: linux-next-20081126/drivers/block/virtio_blk.c:307: warning: large integer implicitly truncated to unsigned type Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-12-30virtio: block: dynamic maximum segmentsRusty Russell
Enhance the driver to handle whatever maximum segment number the host tells us to handle. Do to this, we need to allocate the scatterlist dynamically. We set max_phys_segments and max_hw_segments to the same value (1 if the host doesn't tell us, since that's safest and all known hosts do tell us). Note that kmalloc'ing the structure for large sg_elems might be problematic: the fix for this is sg_table, but that requires more work. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-12-30virtio: set max_segment_size and max_sectors to infinite.Rusty Russell
Setting max_segment_size allows more than 64k per sg element, unless the host specified a limit. Setting max_sectors indicates that our max_hw_segments is the only limit. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-12-29cciss: simplify parameters to deregister_disk functionStephen M. Cameron
Simplify parameters to deregister_disk function. Signed-off-by: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29loop: Do not call loop_unplug for not configured loop device.Milan Broz
In loop_unplug() function is expected that mapping is set and lo->lo_backing_file is not NULL. Unfortunately loop_set_fd() set the request queue unplug function, but loop_clr_fd() doesn't clear that. Loop device allows open of non-configured loop in some situations. If the unplug on request queue is called, loop module oopses because of missing lo_backing_file. Simple reproducer: losetup /dev/loop0 /xxx losetup -d /dev/loop0 dmsetup create x --table "0 1 linear /dev/loop0 0" EIP is at loop_unplug+0x1d/0x3b ... Call Trace: blk_unplug+0x57/0x5e dm_table_unplug_all+0x34/0x77 [dm_mod] destroy_inode+0x27/0x38 generic_delete_inode+0xd5/0xd9 iput+0x4b/0x4e dm_resume+0xca/0xfe [dm_mod] dev_suspend+0x143/0x165 [dm_mod] dm_ctl_ioctl+0x18e/0x1cf [dm_mod] dev_suspend+0x0/0x165 [dm_mod] dm_ctl_ioctl+0x0/0x1cf [dm_mod] vfs_ioctl+0x22/0x69 do_vfs_ioctl+0x39d/0x3c7 trace_hardirqs_on+0xb/0xd remove_vma+0x50/0x56 do_munmap+0x21c/0x237 sys_ioctl+0x2c/0x45 sysenter_do_call+0x12/0x31 Several reports here http://www.kerneloops.org/search.php?search=loop_unplug Fix it by simply clear unplug function together with removing of backing file. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29loop: Flush possible running bios when loop device is released.Milan Broz
When there are still queued bios and reference count drops to zero, loop device must flush all queued bios. Otherwise it can lead to situation that caller closes the device, but some bios are still running and endio() function call later OOpses when uses unallocated mempool. This happens for example when running dm-crypt over loop, here is typical oops backtrace: Oops: 0000 [#1] PREEMPT SMP EIP is at mempool_free+0x12/0x6b ... crypt_dec_pending+0x50/0x54 [dm_crypt] crypt_endio+0x9f/0xa7 [dm_crypt] crypt_endio+0x0/0xa7 [dm_crypt] bio_endio+0x2b/0x2e loop_thread+0x37a/0x3b1 do_lo_send_aops+0x0/0x165 autoremove_wake_function+0x0/0x33 loop_thread+0x0/0x3b1 kthread+0x3b/0x61 kthread+0x0/0x61 kernel_thread_helper+0x7/0x10 (But crash is reproducible with different dm targets running over loop device too.) Patch fixes it by flushing the bios in release call, reusing the flush mechanism for switching backing store. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29nbd: tell the block layer that it is not a rotational deviceJens Axboe
Then we can get rid of that manual elevator type fiddling. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29block: get rid of elevator_t typedefJens Axboe
Just use struct elevator_queue everywhere instead. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29cciss: switch to using hlist for command list managementJens Axboe
This both cleans up the code and also helps detect the spurious case of a command attempted being removed from a queue it doesn't belong to. Acked-by: Mike Miller <mike.miller@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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