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author | Jens Axboe <jens.axboe@oracle.com> | 2007-07-18 13:27:58 +0200 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2007-10-16 11:03:55 +0200 |
commit | c07e2b41291853b19fff11ceee3657df252a4e42 (patch) | |
tree | 3d21930b1ea62615b5b1312edf6bdc5d1ef616e1 /block | |
parent | block: add end_queued_request() and end_dequeued_request() helpers (diff) | |
download | linux-c07e2b41291853b19fff11ceee3657df252a4e42.tar.xz linux-c07e2b41291853b19fff11ceee3657df252a4e42.zip |
block: factor our bio_check_eod()
End of device check is done twice in __generic_make_request() and it's
fully inlined each time. Factor out bio_check_eod().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r-- | block/ll_rw_blk.c | 63 |
1 files changed, 33 insertions, 30 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 8904f8b1f417..548f0d826679 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -3120,6 +3120,35 @@ static inline int should_fail_request(struct bio *bio) #endif /* CONFIG_FAIL_MAKE_REQUEST */ +/* + * Check whether this bio extends beyond the end of the device. + */ +static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors) +{ + sector_t maxsector; + + if (!nr_sectors) + return 0; + + /* Test device or partition size, when known. */ + maxsector = bio->bi_bdev->bd_inode->i_size >> 9; + if (maxsector) { + sector_t sector = bio->bi_sector; + + if (maxsector < nr_sectors || maxsector - nr_sectors < sector) { + /* + * This may well happen - the kernel calls bread() + * without checking the size of the device, e.g., when + * mounting a device. + */ + handle_bad_sector(bio); + return 1; + } + } + + return 0; +} + /** * generic_make_request: hand a buffer to its device driver for I/O * @bio: The bio describing the location in memory and on the device. @@ -3147,27 +3176,14 @@ static inline int should_fail_request(struct bio *bio) static inline void __generic_make_request(struct bio *bio) { struct request_queue *q; - sector_t maxsector; sector_t old_sector; int ret, nr_sectors = bio_sectors(bio); dev_t old_dev; might_sleep(); - /* Test device or partition size, when known. */ - maxsector = bio->bi_bdev->bd_inode->i_size >> 9; - if (maxsector) { - sector_t sector = bio->bi_sector; - if (maxsector < nr_sectors || maxsector - nr_sectors < sector) { - /* - * This may well happen - the kernel calls bread() - * without checking the size of the device, e.g., when - * mounting a device. - */ - handle_bad_sector(bio); - goto end_io; - } - } + if (bio_check_eod(bio, nr_sectors)) + goto end_io; /* * Resolve the mapping until finished. (drivers are @@ -3223,21 +3239,8 @@ end_io: old_sector = bio->bi_sector; old_dev = bio->bi_bdev->bd_dev; - maxsector = bio->bi_bdev->bd_inode->i_size >> 9; - if (maxsector) { - sector_t sector = bio->bi_sector; - - if (maxsector < nr_sectors || - maxsector - nr_sectors < sector) { - /* - * This may well happen - partitions are not - * checked to make sure they are within the size - * of the whole device. - */ - handle_bad_sector(bio); - goto end_io; - } - } + if (bio_check_eod(bio, nr_sectors)) + goto end_io; ret = q->make_request_fn(q, bio); } while (ret); |