From: Al Viro Date: Thu, 6 Mar 2014 00:28:09 +0000 (-0500) Subject: start adding the tag to iov_iter X-Git-Tag: firefly_0821_release~176^2~3774^2~56 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=71d8e532b1549a478e6a6a8a44f309d050294d00;p=firefly-linux-kernel-4.4.55.git start adding the tag to iov_iter 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 --- diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index a0a94a30d85a..f8cee205618a 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1740,7 +1740,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, goto out; } - iov_iter_init(&i, iov, nr_segs, count, 0); + iov_iter_init(&i, WRITE, iov, nr_segs, count); err = file_remove_suid(file); if (err) { diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 910a3022eb27..5b93cadedfbe 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -582,7 +582,7 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov, CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE; - iov_iter_init(&i, iov, nr_segs, count, 0); + iov_iter_init(&i, WRITE, iov, nr_segs, count); while (iov_iter_count(&i) > 0) { void __user *data = i.iov->iov_base + i.iov_offset; @@ -703,7 +703,7 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ACK; - iov_iter_init(&i, iov, nr_segs, count, 0); + iov_iter_init(&i, WRITE, iov, nr_segs, count); while ((len = iov_iter_count(&i)) > 0) { size_t left; @@ -808,7 +808,7 @@ static ssize_t ceph_aio_read(struct kiocb *iocb, const struct iovec *iov, int checkeof = 0, read = 0; struct iov_iter i; - iov_iter_init(&i, iov, nr_segs, len, 0); + iov_iter_init(&i, READ, iov, nr_segs, len); again: dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", @@ -961,7 +961,7 @@ retry_snap: * are pending vmtruncate. So write and vmtruncate * can not run at the same time */ - iov_iter_init(&from, iov, nr_segs, count, 0); + iov_iter_init(&from, WRITE, iov, nr_segs, count); written = generic_perform_write(file, &from, pos); if (likely(written >= 0)) iocb->ki_pos = pos + written; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index a4ccc39e6c11..15201c21ac88 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2424,7 +2424,7 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, else pid = current->tgid; - iov_iter_init(&it, iov, nr_segs, len, 0); + iov_iter_init(&it, WRITE, iov, nr_segs, len); do { size_t save_len; @@ -2854,7 +2854,7 @@ ssize_t cifs_user_readv(struct kiocb *iocb, const struct iovec *iov, if (!len) return 0; - iov_iter_init(&to, iov, nr_segs, len, 0); + iov_iter_init(&to, READ, iov, nr_segs, len); INIT_LIST_HEAD(&rdata_list); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); diff --git a/fs/fuse/file.c b/fs/fuse/file.c index fc54d04a41e2..4a5519ca253f 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1217,7 +1217,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov, err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); if (err) goto out; - iov_iter_init(&i, iov, nr_segs, count, 0); + iov_iter_init(&i, WRITE, iov, nr_segs, count); if (count == 0) goto out; @@ -1386,7 +1386,7 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov, struct fuse_req *req; struct iov_iter ii; - iov_iter_init(&ii, iov, nr_segs, count, 0); + iov_iter_init(&ii, write ? WRITE : READ, iov, nr_segs, count); if (io->async) req = fuse_get_req_for_background(fc, fuse_iter_npages(&ii)); @@ -2367,7 +2367,7 @@ static int fuse_ioctl_copy_user(struct page **pages, struct iovec *iov, if (!bytes) return 0; - iov_iter_init(&ii, iov, nr_segs, bytes, 0); + iov_iter_init(&ii, to_user ? READ : WRITE, iov, nr_segs, bytes); while (iov_iter_count(&ii)) { struct page *page = pages[page_idx++]; diff --git a/fs/nfs/file.c b/fs/nfs/file.c index a352bc6d613f..ead8f44f7973 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -173,7 +173,7 @@ nfs_file_read(struct kiocb *iocb, const struct iovec *iov, ssize_t result; struct iov_iter to; - iov_iter_init(&to, iov, nr_segs, count, 0); + iov_iter_init(&to, READ, iov, nr_segs, count); if (iocb->ki_filp->f_flags & O_DIRECT) return nfs_file_direct_read(iocb, &to, pos, true); @@ -648,7 +648,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, ssize_t result; size_t count = iov_length(iov, nr_segs); struct iov_iter from; - iov_iter_init(&from, iov, nr_segs, count, 0); + iov_iter_init(&from, WRITE, iov, nr_segs, count); result = nfs_key_timeout_notify(file, inode); if (result) diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index d33c4ced0baf..9ce9ed7615c1 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -2361,7 +2361,7 @@ relock: if (ret) goto out_dio; - iov_iter_init(&from, iov, nr_segs, count, 0); + iov_iter_init(&from, WRITE, iov, nr_segs, count); if (direct_io) { written = generic_file_direct_write(iocb, &from, *ppos, count, ocount); diff --git a/fs/pipe.c b/fs/pipe.c index 034bffac3f97..cd4ccf07e772 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -287,7 +287,7 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov, if (unlikely(total_len == 0)) return 0; - iov_iter_init(&iter, iov, nr_segs, total_len, 0); + iov_iter_init(&iter, READ, iov, nr_segs, total_len); do_wakeup = 0; ret = 0; diff --git a/fs/splice.c b/fs/splice.c index 9bc07d2b53cf..f99e420744c7 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1548,7 +1548,7 @@ static long vmsplice_to_user(struct file *file, const struct iovec __user *uiov, if (ret <= 0) return ret; - iov_iter_init(&iter, iov, nr_segs, count, 0); + iov_iter_init(&iter, READ, iov, nr_segs, count); sd.len = 0; sd.total_len = count; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index f0f8084a67be..762bb3e148a6 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -697,7 +697,7 @@ xfs_file_dio_aio_write( } trace_xfs_file_direct_write(ip, count, iocb->ki_pos, 0); - iov_iter_init(&from, iovp, nr_segs, count, 0); + iov_iter_init(&from, WRITE, iovp, nr_segs, count); ret = generic_file_direct_write(iocb, &from, pos, count, ocount); out: @@ -731,7 +731,7 @@ xfs_file_buffered_aio_write( if (ret) goto out; - iov_iter_init(&from, iovp, nr_segs, count, 0); + iov_iter_init(&from, WRITE, iovp, nr_segs, count); /* We can write back this queue in page reclaim */ current->backing_dev_info = mapping->backing_dev_info; diff --git a/include/linux/uio.h b/include/linux/uio.h index 4ee17413fe1b..b80bbe197d13 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -20,6 +20,7 @@ struct kvec { }; struct iov_iter { + int type; const struct iovec *iov; unsigned long nr_segs; size_t iov_offset; @@ -68,18 +69,8 @@ size_t iov_iter_single_seg_count(const struct iov_iter *i); size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes, struct iov_iter *i); unsigned long iov_iter_alignment(const struct iov_iter *i); - -static inline void iov_iter_init(struct iov_iter *i, - const struct iovec *iov, unsigned long nr_segs, - size_t count, size_t written) -{ - i->iov = iov; - i->nr_segs = nr_segs; - i->iov_offset = 0; - i->count = count + written; - - iov_iter_advance(i, written); -} +void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov, + unsigned long nr_segs, size_t count); static inline size_t iov_iter_count(struct iov_iter *i) { diff --git a/mm/filemap.c b/mm/filemap.c index a7f79e90209c..3aeaf2df4135 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1730,7 +1730,7 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov, size_t count = iov_length(iov, nr_segs); struct iov_iter i; - iov_iter_init(&i, iov, nr_segs, count, 0); + iov_iter_init(&i, READ, iov, nr_segs, count); return generic_file_read_iter(iocb, &i); } EXPORT_SYMBOL(generic_file_aio_read); @@ -2596,7 +2596,7 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov, if (err) goto out; - iov_iter_init(&from, iov, nr_segs, count, 0); + iov_iter_init(&from, WRITE, iov, nr_segs, count); /* coalesce the iovecs and go direct-to-BIO for O_DIRECT */ if (unlikely(file->f_flags & O_DIRECT)) { diff --git a/mm/iov_iter.c b/mm/iov_iter.c index 2f762cc21080..e2c9a2db4350 100644 --- a/mm/iov_iter.c +++ b/mm/iov_iter.c @@ -220,3 +220,18 @@ unsigned long iov_iter_alignment(const struct iov_iter *i) return res; } EXPORT_SYMBOL(iov_iter_alignment); + +void iov_iter_init(struct iov_iter *i, int direction, + const struct iovec *iov, unsigned long nr_segs, + size_t count) +{ + /* It will get better. Eventually... */ + if (segment_eq(get_fs(), KERNEL_DS)) + direction |= REQ_KERNEL; + i->type = direction; + i->iov = iov; + i->nr_segs = nr_segs; + i->iov_offset = 0; + i->count = count; +} +EXPORT_SYMBOL(iov_iter_init); diff --git a/mm/page_io.c b/mm/page_io.c index 0ed0644c73db..313bfedb75d1 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -268,7 +268,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc, init_sync_kiocb(&kiocb, swap_file); kiocb.ki_pos = page_file_offset(page); kiocb.ki_nbytes = PAGE_SIZE; - iov_iter_init(&from, &iov, 1, PAGE_SIZE, 0); + iov_iter_init(&from, KERNEL_WRITE, &iov, 1, PAGE_SIZE); set_page_writeback(page); unlock_page(page); diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index f32b1fbbfe69..5077afcd9e11 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -274,7 +274,7 @@ static ssize_t process_vm_rw(pid_t pid, if (rc <= 0) goto free_iovecs; - iov_iter_init(&iter, iov_l, liovcnt, rc, 0); + iov_iter_init(&iter, vm_write ? WRITE : READ, iov_l, liovcnt, rc); rc = rw_copy_check_uvector(CHECK_IOVEC_ONLY, rvec, riovcnt, UIO_FASTIOV, iovstack_r, &iov_r); @@ -337,7 +337,7 @@ compat_process_vm_rw(compat_pid_t pid, &iov_l); if (rc <= 0) goto free_iovecs; - iov_iter_init(&iter, iov_l, liovcnt, rc, 0); + iov_iter_init(&iter, vm_write ? WRITE : READ, iov_l, liovcnt, rc); rc = compat_rw_copy_check_uvector(CHECK_IOVEC_ONLY, rvec, riovcnt, UIO_FASTIOV, iovstack_r, &iov_r); diff --git a/mm/shmem.c b/mm/shmem.c index 2a93e625adaf..e0b76696c3f9 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1417,7 +1417,7 @@ static ssize_t shmem_file_aio_read(struct kiocb *iocb, loff_t *ppos = &iocb->ki_pos; struct iov_iter iter; - iov_iter_init(&iter, iov, nr_segs, count, 0); + iov_iter_init(&iter, READ, iov, nr_segs, count); /* * Might this read be for a stacking filesystem? Then when reading