diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-18 14:43:40 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-18 14:43:40 -0400 |
commit | 020b3023762fdf6cc816ed154e3b1f8eafaf0836 (patch) | |
tree | a45c77db6c2e6ad300125bf54943d9df16b87b6e /fs/direct-io.c | |
parent | 3e0cc09a3a2c40ec1ffb6b4e12da86e98feccb11 (diff) | |
parent | ffe51f0142a291a957eebb9687cafb15f2b3fc14 (diff) |
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Three small fixes:
- A fix for skd, it was using kfree() to free a structure allocate
with kmem_cache_alloc().
- Stable fix for nbd, fixing a regression using the normal ioctl
based tools.
- Fix for a previous fix in this series, that fixed up
inconsistencies between buffered and direct IO"
* 'for-linus' of git://git.kernel.dk/linux-block:
fs: Avoid invalidation in interrupt context in dio_complete()
nbd: don't set the device size until we're connected
skd: Use kmem_cache_free
Diffstat (limited to 'fs/direct-io.c')
-rw-r--r-- | fs/direct-io.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index 96415c65bbdc..563254869e2f 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -45,6 +45,12 @@ #define DIO_PAGES 64 /* + * Flags for dio_complete() + */ +#define DIO_COMPLETE_ASYNC 0x01 /* This is async IO */ +#define DIO_COMPLETE_INVALIDATE 0x02 /* Can invalidate pages */ + +/* * This code generally works in units of "dio_blocks". A dio_block is * somewhere between the hard sector size and the filesystem block size. it * is determined on a per-invocation basis. When talking to the filesystem @@ -225,7 +231,7 @@ static inline struct page *dio_get_page(struct dio *dio, * filesystems can use it to hold additional state between get_block calls and * dio_complete. */ -static ssize_t dio_complete(struct dio *dio, ssize_t ret, bool is_async) +static ssize_t dio_complete(struct dio *dio, ssize_t ret, unsigned int flags) { loff_t offset = dio->iocb->ki_pos; ssize_t transferred = 0; @@ -266,7 +272,8 @@ static ssize_t dio_complete(struct dio *dio, ssize_t ret, bool is_async) * one is a pretty crazy thing to do, so we don't support it 100%. If * this invalidation fails, tough, the write still worked... */ - if (ret > 0 && dio->op == REQ_OP_WRITE && + if (flags & DIO_COMPLETE_INVALIDATE && + ret > 0 && dio->op == REQ_OP_WRITE && dio->inode->i_mapping->nrpages) { err = invalidate_inode_pages2_range(dio->inode->i_mapping, offset >> PAGE_SHIFT, @@ -285,7 +292,7 @@ static ssize_t dio_complete(struct dio *dio, ssize_t ret, bool is_async) if (!(dio->flags & DIO_SKIP_DIO_COUNT)) inode_dio_end(dio->inode); - if (is_async) { + if (flags & DIO_COMPLETE_ASYNC) { /* * generic_write_sync expects ki_pos to have been updated * already, but the submission path only does this for @@ -306,7 +313,7 @@ static void dio_aio_complete_work(struct work_struct *work) { struct dio *dio = container_of(work, struct dio, complete_work); - dio_complete(dio, 0, true); + dio_complete(dio, 0, DIO_COMPLETE_ASYNC | DIO_COMPLETE_INVALIDATE); } static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio); @@ -348,7 +355,7 @@ static void dio_bio_end_aio(struct bio *bio) queue_work(dio->inode->i_sb->s_dio_done_wq, &dio->complete_work); } else { - dio_complete(dio, 0, true); + dio_complete(dio, 0, DIO_COMPLETE_ASYNC); } } } @@ -1360,7 +1367,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, dio_await_completion(dio); if (drop_refcount(dio) == 0) { - retval = dio_complete(dio, retval, false); + retval = dio_complete(dio, retval, DIO_COMPLETE_INVALIDATE); } else BUG_ON(retval != -EIOCBQUEUED); |