search for: submit_io

V1->V2: -Changed dio_end_io to EXPORT_SYMBOL_GPL -Removed the own_submit blockdev dio helper -Removed the boundary change V2->V3 -Made it so we keep track of what the current logical offset in the file we have a BIO setup for so we can pass it into the submit_io hook. Because BTRFS can do RAID and such, we need our own submit hook so we can setup the bio''s in the correct fashion, and handle checksum errors properly. So there are a few changes here 1) The submit_io hook. This is straightforward, just call this instead of submit_bio. 2) Allow t...

V1->V2: Check to see if our current ppos is >= i_size after a short DIO read, just in case it was actually a short read and we need to just return. This is similar to what already happens in the write case. If we have a short read while doing O_DIRECT, instead of just returning, fallthrough and try to read the rest via buffered IO. BTRFS needs this because if we encounter a compressed or

...amp;& (end > i_size_read(inode))); + /* + * some filesystems e.g. btrfs need to separate metadata read + */ + dio->separate_meta_reads = kiocb_needs_separate_meta_reads(iocb); + retval = direct_io_worker(rw, iocb, inode, iov, offset, nr_segs, blkbits, get_block, end_io, submit_io, dio); diff --git a/include/linux/aio.h b/include/linux/aio.h index 7a8db41..9ee9c6e 100644 --- a/include/linux/aio.h +++ b/include/linux/aio.h @@ -34,6 +34,8 @@ struct kioctx; /* #define KIF_LOCKED 0 */ #define KIF_KICKED 1 #define KIF_CANCELLED 2 +/* to separate meta reads */ +#define KIF_S...

i_alloc_sem has always been a bit of an odd "lock". It''s the only remaining rw_semaphore that can be released by a different thread than the one that locked it, and it''s use case in the core direct I/O code is more like a counter given that the writers already have external serialization. This series removes it in favour of a simpler counter scheme, thus getting rid