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* mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIMMel Gorman2015-11-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | __GFP_WAIT was used to signal that the caller was in atomic context and could not sleep. Now it is possible to distinguish between true atomic context and callers that are not willing to sleep. The latter should clear __GFP_DIRECT_RECLAIM so kswapd will still wake. As clearing __GFP_WAIT behaves differently, there is a risk that people will clear the wrong flags. This patch renames __GFP_WAIT to __GFP_RECLAIM to clearly indicate what it does -- setting it allows all reclaim activity, clearing them prevents it. [akpm@linux-foundation.org: fix build] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Christoph Lameter <cl@linux.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Vitaly Wool <vitalywool@gmail.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* block: move REQ_TYPE_SENSE to the ide driverChristoph Hellwig2015-05-051-1/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
* block: rename REQ_TYPE_SPECIAL to REQ_TYPE_DRV_PRIVChristoph Hellwig2015-05-051-2/+2
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
* ide_tape: convert jiffies with jiffies_to_msecsNicholas Mc Guire2015-03-191-2/+2
| | | | | | | | | Use jiffies_to_msecs for converting jiffies as it handles all of the corner cases reliably and also helps readability. The printk format is fixed up as jiffies_to_msecs returns unsigned int not unsigned long. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers: avoid format string in dev_set_nameKees Cook2013-07-041-1/+1
| | | | | | | | | | | Calling dev_set_name with a single paramter causes it to be handled as a format string. Many callers are passing potentially dynamic string content, so use "%s" in those cases to avoid any potential accidents, including wrappers like device_create*() and bdi_register(). Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* block_device_operations->release() should return voidAl Viro2013-05-071-3/+1
| | | | | | | | | The value passed is 0 in all but "it can never happen" cases (and those only in a couple of drivers) *and* it would've been lost on the way out anyway, even if something tried to pass something meaningful. Just don't bother. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* procfs: new helper - PDE_DATA(inode)Al Viro2013-04-091-1/+1
| | | | | | | | | | The only part of proc_dir_entry the code outside of fs/proc really cares about is PDE(inode)->data. Provide a helper for that; static inline for now, eventually will be moved to fs/proc, along with the knowledge of struct proc_dir_entry layout. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ide-{cd,floppy,tape}: Do not include <linux/irq.h>Geert Uytterhoeven2011-11-081-1/+0
| | | | | | | | | | | | | | | | | | | | | The top of <linux/irq.h> has this comment: * Please do not include this file in generic code. There is currently * no requirement for any architecture to implement anything held * within this file. * * Thanks. --rmk Remove inclusion of <linux/irq.h>, to prevent the following compile error from happening soon: | include/linux/irq.h:132: error: redefinition of ‘struct irq_data’ | include/linux/irq.h:286: error: redefinition of ‘struct irq_chip’ Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Borislav Petkov <bp@alien8.de> Cc: linux-ide@vger.kernel.org
* Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bklLinus Torvalds2010-10-221-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: vfs: make no_llseek the default vfs: don't use BKL in default_llseek llseek: automatically add .llseek fop libfs: use generic_file_llseek for simple_attr mac80211: disallow seeks in minstrel debug code lirc: make chardev nonseekable viotape: use noop_llseek raw: use explicit llseek file operations ibmasmfs: use generic_file_llseek spufs: use llseek in all file operations arm/omap: use generic_file_llseek in iommu_debug lkdtm: use generic_file_llseek in debugfs net/wireless: use generic_file_llseek in debugfs drm: use noop_llseek
| * llseek: automatically add .llseek fopArnd Bergmann2010-10-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All file_operations should get a .llseek operation so we can make nonseekable_open the default for future file operations without a .llseek pointer. The three cases that we can automatically detect are no_llseek, seq_lseek and default_llseek. For cases where we can we can automatically prove that the file offset is always ignored, we use noop_llseek, which maintains the current behavior of not returning an error from a seek. New drivers should normally not use noop_llseek but instead use no_llseek and call nonseekable_open at open time. Existing drivers can be converted to do the same when the maintainer knows for certain that no user code relies on calling seek on the device file. The generated code is often incorrectly indented and right now contains comments that clarify for each added line why a specific variant was chosen. In the version that gets submitted upstream, the comments will be gone and I will manually fix the indentation, because there does not seem to be a way to do that using coccinelle. Some amount of new code is currently sitting in linux-next that should get the same modifications, which I will do at the end of the merge window. Many thanks to Julia Lawall for helping me learn to write a semantic patch that does all this. ===== begin semantic patch ===== // This adds an llseek= method to all file operations, // as a preparation for making no_llseek the default. // // The rules are // - use no_llseek explicitly if we do nonseekable_open // - use seq_lseek for sequential files // - use default_llseek if we know we access f_pos // - use noop_llseek if we know we don't access f_pos, // but we still want to allow users to call lseek // @ open1 exists @ identifier nested_open; @@ nested_open(...) { <+... nonseekable_open(...) ...+> } @ open exists@ identifier open_f; identifier i, f; identifier open1.nested_open; @@ int open_f(struct inode *i, struct file *f) { <+... ( nonseekable_open(...) | nested_open(...) ) ...+> } @ read disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ read_no_fpos disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { ... when != off } @ write @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ write_no_fpos @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { ... when != off } @ fops0 @ identifier fops; @@ struct file_operations fops = { ... }; @ has_llseek depends on fops0 @ identifier fops0.fops; identifier llseek_f; @@ struct file_operations fops = { ... .llseek = llseek_f, ... }; @ has_read depends on fops0 @ identifier fops0.fops; identifier read_f; @@ struct file_operations fops = { ... .read = read_f, ... }; @ has_write depends on fops0 @ identifier fops0.fops; identifier write_f; @@ struct file_operations fops = { ... .write = write_f, ... }; @ has_open depends on fops0 @ identifier fops0.fops; identifier open_f; @@ struct file_operations fops = { ... .open = open_f, ... }; // use no_llseek if we call nonseekable_open //////////////////////////////////////////// @ nonseekable1 depends on !has_llseek && has_open @ identifier fops0.fops; identifier nso ~= "nonseekable_open"; @@ struct file_operations fops = { ... .open = nso, ... +.llseek = no_llseek, /* nonseekable */ }; @ nonseekable2 depends on !has_llseek @ identifier fops0.fops; identifier open.open_f; @@ struct file_operations fops = { ... .open = open_f, ... +.llseek = no_llseek, /* open uses nonseekable */ }; // use seq_lseek for sequential files ///////////////////////////////////// @ seq depends on !has_llseek @ identifier fops0.fops; identifier sr ~= "seq_read"; @@ struct file_operations fops = { ... .read = sr, ... +.llseek = seq_lseek, /* we have seq_read */ }; // use default_llseek if there is a readdir /////////////////////////////////////////// @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier readdir_e; @@ // any other fop is used that changes pos struct file_operations fops = { ... .readdir = readdir_e, ... +.llseek = default_llseek, /* readdir is present */ }; // use default_llseek if at least one of read/write touches f_pos ///////////////////////////////////////////////////////////////// @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read.read_f; @@ // read fops use offset struct file_operations fops = { ... .read = read_f, ... +.llseek = default_llseek, /* read accesses f_pos */ }; @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, ... + .llseek = default_llseek, /* write accesses f_pos */ }; // Use noop_llseek if neither read nor write accesses f_pos /////////////////////////////////////////////////////////// @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; identifier write_no_fpos.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, .read = read_f, ... +.llseek = noop_llseek, /* read and write both use no f_pos */ }; @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write_no_fpos.write_f; @@ struct file_operations fops = { ... .write = write_f, ... +.llseek = noop_llseek, /* write uses no f_pos */ }; @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; @@ struct file_operations fops = { ... .read = read_f, ... +.llseek = noop_llseek, /* read uses no f_pos */ }; @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; @@ struct file_operations fops = { ... +.llseek = noop_llseek, /* no read or write fn */ }; ===== End semantic patch ===== Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Julia Lawall <julia@diku.dk> Cc: Christoph Hellwig <hch@infradead.org>
* | block: autoconvert trivial BKL users to private mutexArnd Bergmann2010-10-051-10/+9
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The block device drivers have all gained new lock_kernel calls from a recent pushdown, and some of the drivers were already using the BKL before. This turns the BKL into a set of per-driver mutexes. Still need to check whether this is safe to do. file=$1 name=$2 if grep -q lock_kernel ${file} ; then if grep -q 'include.*linux.mutex.h' ${file} ; then sed -i '/include.*<linux\/smp_lock.h>/d' ${file} else sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file} fi sed -i ${file} \ -e "/^#include.*linux.mutex.h/,$ { 1,/^\(static\|int\|long\)/ { /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex); } }" \ -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \ -e '/[ ]*cycle_kernel_lock();/d' else sed -i -e '/include.*\<smp_lock.h\>/d' ${file} \ -e '/cycle_kernel_lock()/d' fi Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* block: push down BKL into .open and .releaseArnd Bergmann2010-08-071-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | The open and release block_device_operations are currently called with the BKL held. In order to change that, we must first make sure that all drivers that currently rely on this have no regressions. This blindly pushes the BKL into all .open and .release operations for all block drivers to prepare for the next step. The drivers can subsequently replace the BKL with their own locks or remove it completely when it can be shown that it is not needed. The functions blkdev_get and blkdev_put are the only remaining users of the big kernel lock in the block layer, besides a few uses in the ioctl code, none of which need to serialize with blkdev_{get,put}. Most of these two functions is also under the protection of bdev->bd_mutex, including the actual calls to ->open and ->release, and the common code does not access any global data structures that need the BKL. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* block: push down BKL into .locked_ioctlArnd Bergmann2010-08-071-2/+8
| | | | | | | | | | | As a preparation for the removal of the big kernel lock in the block layer, this removes the BKL from the common ioctl handling code, moving it into every single driver still using it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* block: remove wrappers for request type/flagsChristoph Hellwig2010-08-071-1/+2
| | | | | | | | | Remove all the trivial wrappers for the cmd_type and cmd_flags fields in struct requests. This allows much easier grepping for different request types instead of unwinding through macros. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* ide_tape: kill off use of the ->ioctl operationAlan Cox2010-01-121-2/+12
| | | | | | | | | Ready to get everything using unlocked_ioctl() For ide_tape we just push down as this is legacy code anyway Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ide-tape: remove the BKLBorislav Petkov2009-10-291-6/+15
| | | | | | | | Replace the BKL calls in the chrdev_{open,release} interfaces with a simple sleeping mutex. Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* const: make block_device_operations constAlexey Dobriyan2009-09-221-1/+1
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ide: convert to ->proc_fopsAlexey Dobriyan2009-09-021-10/+21
| | | | | | | | | | | | ->read_proc, ->write_proc are going away, ->proc_fops should be used instead. The only tricky place is IDENTIFY handling: if for some reason taskfile_lib_get_identify() fails, buffer _is_ changed and at least first byte is overwritten. Emulate old behaviour with returning that first byte to userspace and reporting length=1 despite overall -E. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ide-tape: fix handling of postponed rqsBorislav Petkov2009-08-071-22/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ide-tape used to hit [ 58.614854] ide-tape: ht0: BUG: Two DSC requests queued! due to the fact that another rq was being issued while the driver was waiting for DSC to get set for the device executing ATAPI commands which set the DSC to 1 to indicate completion. Here's a sample output of that case: issue REZERO_UNIT [ 143.088505] ide-tape: ide_tape_issue_pc: retry #0, cmd: 0x01 [ 143.095122] ide: Enter ide_pc_intr - interrupt handler [ 143.096118] ide: Packet command completed, 0 bytes transferred [ 143.106319] ide-tape: ide_tape_callback: cmd: 0x1, dsc: 1, err: 0 [ 143.112601] ide-tape: idetape_postpone_request: cmd: 0x1, dsc_poll_freq: 2000 we stall the ide-tape queue here waiting for DSC [ 143.119936] ide-tape: ide_tape_read_position: enter [ 145.119019] ide-tape: idetape_do_request: sector: 4294967295, nr_sectors: 0 and issue the new READ_POSITION rq and hit the check. [ 145.126247] ide-tape: ht0: BUG: Two DSC requests queued! [ 145.131748] ide-tape: ide_tape_read_position: BOP - No [ 145.137059] ide-tape: ide_tape_read_position: EOP - No Also, ->postponed_rq used to point to that postponed request. To make things worse, in certain circumstances the rq it was pointing to got replaced unterneath it by swiftly reusing the same rq from the mempool of the block layer practically confusing stuff even more. However, we don't need to keep a pointer to that rq but simply wait for DSC to be set first before issuing the follow-up request in the drive's queue. In order to do that, we make idetape_do_request() first check the DSC and if not set, we stall the drive queue giving the other device on that IDE channel a chance. Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ide-tape: convert to ide_debug_log macroBorislav Petkov2009-08-071-53/+49
| | | | | | | | | Remove tape->debug_mask and use drive->debug_mask instead. There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ide-tape: fix debug callMark de Wever2009-08-071-1/+1
| | | | | | | This error only occurs when IDETAPE_DEBUG_LOG is enabled. Signed-off-by: Mark de Wever <koraq@xs4all.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
* ide-tape: Don't leak kernel stack informationMichael Buesch2009-07-221-0/+1
| | | | | | | | Don't leak kernel stack information through uninitialized structure members. Signed-off-by: Michael Buesch <mb@bu3sch.de> Acked-by: Borislav Petkov <petkovbb@gmail.com>. Signed-off-by: David S. Miller <davem@davemloft.net>
* ide: BUG() on unknown requestsBartlomiej Zolnierkiewicz2009-06-151-9/+1
| | | | | | | | Unsupported requests should be never handed down to device drivers and the best thing we can do upon discovering such request inside driver's ->do_request method is to just BUG(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide-tape: fix build issueBorislav Petkov2009-06-151-1/+1
| | | | | | | | | | | This fixes drivers/ide/ide-tape.c: In function `idetape_chrdev_open': drivers/ide/ide-tape.c:1515: error: implicit declaration of function `idetape_read_position' make[1]: *** [drivers/ide/ide-tape.o] Error 1 Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* Merge branch 'bp-remove-pc-buf' into for-nextBartlomiej Zolnierkiewicz2009-06-131-91/+83
|\ | | | | | | | | Conflicts: drivers/ide/ide-tape.c
| * ide-atapi: remove pc->bufBorislav Petkov2009-05-151-5/+2
| | | | | | | | | | | | | | | | | | Now after all users of pc->buf have been converted, remove the 64B buffer embedded in each packet command. There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-tape: fix READ POSITION cmd handlingBorislav Petkov2009-05-151-53/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ide-tape used to issue READ POSITION in several places and the evaluation of the returned READ POSITION data was done in the ->pc_callback. Convert it to use local buffer and move that evaluation chunk in the idetape_read_position(). Additionally, fold idetape_create_read_position_cmd() into it, too, thus concentrating READ POSITION handling in one method only and making all places call that. Finally, mv {idetape,ide_tape}_read_position. There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-tape/ide_tape_get_bsize_from_bdesc: use local bufferBorislav Petkov2009-05-151-5/+6
| | | | | | | | | | | | There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-atapi: use local sense bufferBorislav Petkov2009-05-151-2/+3
| | | | | | | | | | | | | | | | | | Access the sense buffer through the bio in ->pc_callback method thus alleviating the need for the pc->buf pointer. There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-atapi: add a buffer-arg to ide_queue_pc_tailBorislav Petkov2009-05-151-19/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This is in preparation of removing ide_atapi_pc. Expose the buffer as an argument to ide_queue_pc_tail with later replacing it with local buffer or even kmalloc'ed one if needed due to stack usage constraints. Also, add the possibility of passing a NULL-ptr buffer for cmds which don't transfer data besides the cdb. While at it, switch to local buffer in idetape_get_mode_sense_results(). There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-atapi: add a len-parameter to ide_queue_pc_tailBorislav Petkov2009-05-151-13/+13
| | | | | | | | | | | | | | | | This is in preparation for removing ide_atapi_pc. There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-atapi: switch to rq->resid_lenBorislav Petkov2009-05-151-7/+5
| | | | | | | | | | | | | | | | | | | | Now that we have rq->resid_len, use it to account partial completion amount during the lifetime of an rq, decrementing it on each successful transfer. As a result, get rid of now unused pc->xferred. While at it, remove noisy debug call in ide_prep_sense. Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-atapi: switch to blk_rq_bytes() on do_request() pathBorislav Petkov2009-05-151-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After the recent struct request cleanups, blk_rq_bytes() is guaranteed to be valid and is the current total length of the rq's bio. Use that instead of pc->req_xfer in the do_request() path after the command has been queued The remaining usage of pc->req_xfer now is only until we map the rq to a bio. While at it: - remove local caching of rq completion length in ide_tape_issue_pc() Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
| * ide-tape: fix potential fs requests bugBorislav Petkov2009-05-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | ide-tape had a potential bug for fs requests when preparing the command packet: it was writing the transfer length as a number of fixed blocks. However, the block layer implies 512 byte blocks and ide-tape can have other block sizes so account for that too. ide-floppy does this calculation properly with the block size factor (floppy->bs_factor). Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
* | Merge branch 'for-2.6.31' of ↵Linus Torvalds2009-06-121-44/+46
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 * 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (29 commits) ide: re-implement ide_pci_init_one() on top of ide_pci_init_two() ide: unexport ide_find_dma_mode() ide: fix PowerMac bootup oops ide: skip probe if there are no devices on the port (v2) sl82c105: add printk() logging facility ide-tape: fix proc warning ide: add IDE_DFLAG_NIEN_QUIRK device flag ide: respect quirk_drives[] list on all controllers hpt366: enable all quirks for devices on quirk_drives[] list hpt366: sync quirk_drives[] list with pdc202xx_{new,old}.c ide: remove superfluous SELECT_MASK() call from do_rw_taskfile() ide: remove superfluous SELECT_MASK() call from ide_driveid_update() icside: remove superfluous ->maskproc method ide-tape: fix IDE_AFLAG_* atomic accesses ide-tape: change IDE_AFLAG_IGNORE_DSC non-atomically pdc202xx_old: kill resetproc() method pdc202xx_old: don't call pdc202xx_reset() on IRQ timeout pdc202xx_old: use ide_dma_test_irq() ide: preserve Host Protected Area by default (v2) ide-gd: implement block device ->set_capacity method (v2) ...
| * | ide-tape: fix proc warningBorislav Petkov2009-06-081-22/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ide_tape_chrdev_get() was missing an ide_device_get() refcount increment which lead to the following warning: [ 278.147906] ------------[ cut here ]------------ [ 278.152685] WARNING: at fs/proc/generic.c:847 remove_proc_entry+0x199/0x1b8() [ 278.160070] Hardware name: P4I45PE 1.00 [ 278.160076] remove_proc_entry: removing non-empty directory 'ide0/hdb', leaking at least 'name' [ 278.160080] Modules linked in: rtc intel_agp pcspkr thermal processor thermal_sys parport_pc parport agpgart button [ 278.160100] Pid: 2312, comm: mt Not tainted 2.6.30-rc2 #3 [ 278.160105] Call Trace: [ 278.160117] [<c012141d>] warn_slowpath+0x71/0xa0 [ 278.160126] [<c035f219>] ? _spin_unlock_irqrestore+0x29/0x2c [ 278.160132] [<c011c686>] ? try_to_wake_up+0x1b6/0x1c0 [ 278.160141] [<c011c69b>] ? default_wake_function+0xb/0xd [ 278.160149] [<c0177ead>] ? pollwake+0x4a/0x55 [ 278.160156] [<c035f240>] ? _spin_unlock+0x24/0x26 [ 278.160163] [<c0165d38>] ? add_partial+0x44/0x49 [ 278.160169] [<c01669e8>] ? __slab_free+0xba/0x29c [ 278.160177] [<c01a13d8>] ? sysfs_delete_inode+0x0/0x3c [ 278.160184] [<c019ca92>] remove_proc_entry+0x199/0x1b8 [ 278.160191] [<c01a297e>] ? remove_dir+0x27/0x2e [ 278.160199] [<c025f3ab>] ide_proc_unregister_device+0x40/0x4c [ 278.160207] [<c02599cd>] drive_release_dev+0x14/0x47 [ 278.160214] [<c0250538>] device_release+0x35/0x5a [ 278.160221] [<c01f8bed>] kobject_release+0x40/0x50 [ 278.160226] [<c01f8bad>] ? kobject_release+0x0/0x50 [ 278.160232] [<c01f96ac>] kref_put+0x3c/0x4a [ 278.160238] [<c01f8b29>] kobject_put+0x37/0x3c [ 278.160243] [<c025020c>] put_device+0xf/0x11 [ 278.160249] [<c025789f>] ide_device_put+0x2d/0x30 [ 278.160255] [<c02658da>] ide_tape_put+0x24/0x32 [ 278.160261] [<c0266e0c>] idetape_chrdev_release+0x17f/0x18e [ 278.160269] [<c016c4f5>] __fput+0xca/0x175 [ 278.160275] [<c016c5b9>] fput+0x19/0x1b [ 278.160280] [<c0169d19>] filp_close+0x51/0x5b [ 278.160286] [<c0169d96>] sys_close+0x73/0xad [ 278.160293] [<c0102a61>] syscall_call+0x7/0xb [ 278.160298] ---[ end trace f16d907ea1f89336 ]--- Instead of trivially fixing it by adding the missing call, ide_tape_chrdev_get() and ide_tape_get() were merged into one function since both were almost identical. The only difference was that ide_tape_chrdev_get() was accessing the ide-tape reference through the idetape_devs[] array of minors instead of through the gendisk. Accomodate that by adding two additional parameters to ide_tape_get() to annotate the call site and invoke the proper behavior. As a result, remove ide_tape_chrdev_get(). Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide-tape: fix IDE_AFLAG_* atomic accessesBorislav Petkov2009-06-071-17/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | These flags used to be bit numbers and now are single bits in the ->atapi_flags vector. Use them properly. Spotted-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide-tape: change IDE_AFLAG_IGNORE_DSC non-atomicallyBorislav Petkov2009-06-071-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are two sites where the flag is being changed: ide_retry_pc and idetape_do_request. Both codepaths are protected by hwif->busy (ide_lock_port) and therefore we shouldn't need the atomic accesses. Spotted-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | | Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2009-06-111-6/+6
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block: (153 commits) block: add request clone interface (v2) floppy: fix hibernation ramdisk: remove long-deprecated "ramdisk=" boot-time parameter fs/bio.c: add missing __user annotation block: prevent possible io_context->refcount overflow Add serial number support for virtio_blk, V4a block: Add missing bounce_pfn stacking and fix comments Revert "block: Fix bounce limit setting in DM" cciss: decode unit attention in SCSI error handling code cciss: Remove no longer needed sendcmd reject processing code cciss: change SCSI error handling routines to work with interrupts enabled. cciss: separate error processing and command retrying code in sendcmd_withirq_core() cciss: factor out fix target status processing code from sendcmd functions cciss: simplify interface of sendcmd() and sendcmd_withirq() cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code cciss: Use schedule_timeout_uninterruptible in SCSI error handling code block: needs to set the residual length of a bidi request Revert "block: implement blkdev_readpages" block: Fix bounce limit setting in DM Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt ... Manually fix conflicts with tracing updates in: block/blk-sysfs.c drivers/ide/ide-atapi.c drivers/ide/ide-cd.c drivers/ide/ide-floppy.c drivers/ide/ide-tape.c include/trace/events/block.h kernel/trace/blktrace.c
| * | block: set rq->resid_len to blk_rq_bytes() on issueTejun Heo2009-05-191-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit c3a4d78c580de4edc9ef0f7c59812fb02ceb037f, while introducing rq->resid_len, the default value of residue count was changed from full count to zero. The conversion was done under the assumption that when a request fails residue count wasn't defined. However, Boaz and James pointed out that this wasn't true and the residue count should be preserved for failed requests too. This patchset restores the original behavior by setting rq->resid_len to blk_rq_bytes(rq) on request start and restoring explicit clearing in affected drivers. While at it, take advantage of the fact that rq->resid_len is set to full count where applicable. * ide-cd: rq->resid_len cleared on pc success * mptsas: req->resid_len cleared on success * sas_expander: rsp/req->resid_len cleared on success * mpt2sas_transport: req->resid_len cleared on success * ide-cd, ide-tape, mptsas, sas_host_smp, mpt2sas_transport, ub: take advantage of initial full count to simplify code Boaz Harrosh spotted bug in resid_len initialization. Fixed as suggested. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Borislav Petkov <petkovbb@googlemail.com> Cc: Boaz Harrosh <bharrosh@panasas.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Pete Zaitcev <zaitcev@redhat.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Eric Moore <Eric.Moore@lsi.com> Cc: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * ide: cleanup rq->data_len usagesTejun Heo2009-05-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | With recent unification of fields, it's now guaranteed that rq->data_len always equals blk_rq_bytes(). Convert all direct users to accessors. [ Impact: convert direct rq->data_len usages to blk_rq_bytes() ] Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Borislav Petkov <petkovbb@googlemail.com> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * ide: convert to rq pos and nr_sectors accessorsTejun Heo2009-05-111-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | ide doesn't manipulate request fields anymore and thus all hard and their soft equivalents are always equal. Convert all references to accessors. [ Impact: use pos and nr_sectors accessors ] Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Borislav Petkov <petkovbb@googlemail.com> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: add rq->resid_lenTejun Heo2009-05-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rq->data_len served two purposes - the length of data buffer on issue and the residual count on completion. This duality creates some headaches. First of all, block layer and low level drivers can't really determine what rq->data_len contains while a request is executing. It could be the total request length or it coulde be anything else one of the lower layers is using to keep track of residual count. This complicates things because blk_rq_bytes() and thus [__]blk_end_request_all() relies on rq->data_len for PC commands. Drivers which want to report residual count should first cache the total request length, update rq->data_len and then complete the request with the cached data length. Secondly, it makes requests default to reporting full residual count, ie. reporting that no data transfer occurred. The residual count is an exception not the norm; however, the driver should clear rq->data_len to zero to signify the normal cases while leaving it alone means no data transfer occurred at all. This reverse default behavior complicates code unnecessarily and renders block PC on some drivers (ide-tape/floppy) unuseable. This patch adds rq->resid_len which is used only for residual count. While at it, remove now unnecessasry blk_rq_bytes() caching in ide_pc_intr() as rq->data_len is not changed anymore. Boaz : spotted missing conversion in osd Sergei : spotted too early conversion to blk_rq_bytes() in ide-tape [ Impact: cleanup residual count handling, report 0 resid by default ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Borislav Petkov <petkovbb@googlemail.com> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Mike Miller <mike.miller@hp.com> Cc: Eric Moore <Eric.Moore@lsi.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: Mike Miller <mike.miller@hp.com> Cc: Eric Moore <Eric.Moore@lsi.com> Cc: Darrick J. Wong <djwong@us.ibm.com> Cc: Pete Zaitcev <zaitcev@redhat.com> Cc: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * ide-tape: don't initialize rq->sector for rw requestsTejun Heo2009-05-111-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | rq->sector is set to the tape->first_frame but it's never actually used and not even in the correct unit (512 byte sectors). Don't set it. [ Impact: cleanup ] Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Borislav Petkov <petkovbb@gmail.com> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * ide-atapi: kill unused fields and callbacksTejun Heo2009-04-281-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | Impact: remove fields and code paths which are no longer necessary Now that ide-tape uses standard mechanisms to transfer data, special case handling for bh handling can be dropped from ide-atapi. Drop the followings. * pc->cur_pos, b_count, bh and b_data * drive->pc_update_buffers() and pc_io_buffers(). Signed-off-by: Tejun Heo <tj@kernel.org>
| * ide-tape: simplify read/write functionsTejun Heo2009-04-281-99/+50
| | | | | | | | | | | | | | | | | | | | | | Impact: cleanup idetape_chrdev_read/write() functions are unnecessarily complex when everything can be handled in a single loop. Collapse idetape_add_chrdev_read/write_request() into the rw functions and simplify the implementation. Signed-off-by: Tejun Heo <tj@kernel.org>
| * ide-tape: use byte size instead of sectors on rw issue functionsTejun Heo2009-04-281-25/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Byte size is what most issue functions deal with, make idetape_queue_rw_tail() and its wrappers take byte size instead of sector counts. idetape_chrdev_read() and write() functions are converted to use tape->buffer_size instead of ctl from tape->cap. This cleans up code a little bit and will ease the next r/w reimplementation. Signed-off-by: Tejun Heo <tj@kernel.org>
| * ide-tape: unify r/w init pathsTejun Heo2009-04-281-64/+46
| | | | | | | | | | | | | | | | | | Impact: cleanup Read and write init paths are almost identical. Unify them into idetape_init_rw(). Signed-off-by: Tejun Heo <tj@kernel.org>
| * ide-tape: kill idetape_bhTejun Heo2009-04-281-221/+84
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: kill now unnecessary idetape_bh With everything using standard mechanisms, there is no need for idetape_bh anymore. Kill it and use tape->buf, cur and valid to describe data buffer instead. Changes worth mentioning are... * idetape_queue_rq_tail() now always queue tape->buf and and adjusts buffer state properly before completion. * idetape_pad_zeros() clears the buffer only once. Signed-off-by: Tejun Heo <tj@kernel.org>
| * ide-tape: use standard data transfer mechanismTejun Heo2009-04-281-89/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use standard way to transfer data ide-tape uses rq in an interesting way. For r/w requests, rq->special is used to carry a private buffer management structure idetape_bh and rq->nr_sectors and current_nr_sectors are initialized to the number of idetape blocks which isn't necessary 512 bytes. Also, rq->current_nr_sectors is used to report back the residual count in units of idetape blocks. This peculiarity taxes both block layer and ide. ide-atapi has different paths and hooks to accomodate it and what a rq means becomes quite confusing and making changes at the block layer becomes quite difficult and error-prone. This patch makes ide-tape use bio instead. With the previous patch, ide-tape currently is using single contiguos buffer so replacing it isn't difficult. Data buffer is mapped into bio using blk_rq_map_kern() in idetape_queue_rw_tail(). idetape_io_buffers() and idetape_update_buffers() are dropped and pc->bh is set to null to tell ide-atapi to use standard data transfer mechanism and idetape_bh byte counts are updated by the issuer on completion using the residual count. This change also nicely removes the FIXME in ide_pc_intr() where ide-tape rqs need to be completed using ide_rq_bytes() instead of blk_rq_bytes() (although this didn't really matter as the request didn't have bio). Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <jens.axboe@oracle.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 17:46:16 +0100