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2014-05-06new helper: copy_page_from_iter()Al Viro
parallel to copy_page_to_iter(). pipe_write() switched to it (and became ->write_iter()). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06fuse: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06btrfs: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ocfs2: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06xfs: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06afs: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06gfs2: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06nfs: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ubifs: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06bury __generic_file_aio_write()Al Viro
all users converted to __generic_file_write_iter() now Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06cifs: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06udf: switch to ->write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06convert ext4 to ->write_iter()Al Viro
unfortunately, Ted's changes to ext4_file_write() are *still* an incomplete fix - playing with rlimits can let you smuggle an unaligned request past the checks. So there almost certainly will be more merge PITA around that place... [fix from Peter Ujfalusi <peter.ujfalusi@ti.com> folded] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06Merge ext4 changes in ext4_file_write() into for-nextAl Viro
From ext4.git#dev, needed for switch of ext4 to ->write_iter() ;-/
2014-05-06blkdev_aio_write() - turn into blkdev_write_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06write_iter variants of {__,}generic_file_aio_write()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ceph: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06nfs: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06fs/block_dev.c: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06shmem: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06pipe: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06cifs: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06fuse_file_aio_read(): convert to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ocfs2: switch to ->read_iter()Al Viro
tracepoints are evil, exhibit #6969... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ecryptfs: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06xfs: switch to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06switch simple generic_file_aio_read() users to ->read_iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06new methods: ->read_iter() and ->write_iter()Al Viro
Beginning to introduce those. Just the callers for now, and it's clumsier than it'll eventually become; once we finish converting aio_read and aio_write instances, the things will get nicer. For now, these guys are in parallel to ->aio_read() and ->aio_write(); they take iocb and iov_iter, with everything in iov_iter already validated. File offset is passed in iocb->ki_pos, iov/nr_segs - in iov_iter. Main concerns in that series are stack footprint and ability to split the damn thing cleanly. [fix from Peter Ujfalusi <peter.ujfalusi@ti.com> folded] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06replace checking for ->read/->aio_read presence with check in ->f_modeAl Viro
Since we are about to introduce new methods (read_iter/write_iter), the tests in a bunch of places would have to grow inconveniently. Check once (at open() time) and store results in ->f_mode as FMODE_CAN_READ and FMODE_CAN_WRITE resp. It might end up being a temporary measure - once everything switches from ->aio_{read,write} to ->{read,write}_iter it might make sense to return to open-coded checks. We'll see... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06xfs: trim the argument lists of xfs_file_{dio,buffered}_aio_write()Al Viro
pos is redundant (it's iocb->ki_pos), and iov/nr_segs/count are taken care of by lifting iov_iter into the caller. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06blkdev_aio_read(): switch to generic_file_read_iter(), get rid of iov_shorten()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06iov_iter_truncate()Al Viro
Now It Can Be Done(tm) - we don't need to do iov_shorten() in generic_file_direct_write() anymore, now that all ->direct_IO() instances are converted to proper iov_iter methods and honour iter->count and iter->iov_offset properly. Get rid of count/ocount arguments of generic_file_direct_write(), while we are at it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06btrfs: switch check_direct_IO() to iov_iterAl Viro
... and don't open-code iov_iter_alignment() there Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06new helper: iov_iter_get_pages_alloc()Al Viro
same as iov_iter_get_pages(), except that pages array is allocated (kmalloc if possible, vmalloc if that fails) and left for caller to free. Lustre and NFS ->direct_IO() switched to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06new helper: iov_iter_npages()Al Viro
counts the pages covered by iov_iter, up to given limit. do_block_direct_io() and fuse_iter_npages() switched to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06f2fs: switch to iov_iter_alignment()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06fuse: switch to iov_iter_get_pages()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06fuse: pull iov_iter initializations upAl Viro
... to fuse_direct_{read,write}(). ->direct_IO() path uses the iov_iter passed by the caller instead. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06new helper: iov_iter_get_pages()Al Viro
iov_iter_get_pages(iter, pages, maxsize, &start) grabs references pinning the pages of up to maxsize of (contiguous) data from iter. Returns the amount of memory grabbed or -error. In case of success, the requested area begins at offset start in pages[0] and runs through pages[1], etc. Less than requested amount might be returned - either because the contiguous area in the beginning of iterator is smaller than requested, or because the kernel failed to pin that many pages. direct-io.c switched to using iov_iter_get_pages() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06dio: take updating ->result into do_direct_IO()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06start adding the tag to iov_iterAl Viro
For now, just use the same thing we pass to ->direct_IO() - it's all iovec-based at the moment. Pass it explicitly to iov_iter_init() and account for kvec vs. iovec in there, by the same kludge NFS ->direct_IO() uses. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06new helper: generic_file_read_iter()Al Viro
iov_iter-using variant of generic_file_aio_read(). Some callers converted. Note that it's still not quite there for use as ->read_iter() - we depend on having zero iter->iov_offset in O_DIRECT case. Fortunately, that's true for all converted callers (and for generic_file_aio_read() itself). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06fuse_file_aio_write(): merge initializations of iov_iterAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ceph_aio_read(): keep iov_iter across retriesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06new primitive: iov_iter_alignment()Al Viro
returns the value aligned as badly as the worst remaining segment in iov_iter is. Use instead of open-coded equivalents. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06give ->direct_IO() a copy of iov_iterAl Viro
the thing is, we want to advance what's given to ->direct_IO() as we are forming the request; however, the callers care about the amount of data actually transferred, not the amount we tried to transfer. It's more convenient to allow ->direct_IO() instances do use iov_iter_advance() on the copy of iov_iter, leaving the actual advancing of the original to caller. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06switch {__,}blockdev_direct_IO() to iov_iterAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06get rid of pointless iov_length() in ->direct_IO()Al Viro
all callers have iov_length(iter->iov, iter->nr_segs) == iov_iter_count(iter) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06ext4: switch the guts of ->direct_IO() to iov_iterAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06convert the guts of nfs_direct_IO() to iov_iterAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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