From 0050e98011348cbe4ce93c62d2e52370a0093762 Mon Sep 17 00:00:00 2001 From: Dave Kleikamp Date: Fri, 14 Jun 2013 15:54:26 -0500 Subject: [PATCH] xfs: add support for read_iter and write_iter Signed-off-by: Dave Kleikamp Acked-by: Dave Chinner Cc: Ben Myers Cc: Alex Elder Cc: xfs@oss.sgi.com --- fs/xfs/xfs_file.c | 51 +++++++++++++++++++---------------------------- 1 file changed, 20 insertions(+), 31 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 4c749ab543d0..818c6230bb35 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -227,10 +227,9 @@ xfs_file_fsync( } STATIC ssize_t -xfs_file_aio_read( +xfs_file_read_iter( struct kiocb *iocb, - const struct iovec *iovp, - unsigned long nr_segs, + struct iov_iter *iter, loff_t pos) { struct file *file = iocb->ki_filp; @@ -251,9 +250,7 @@ xfs_file_aio_read( if (file->f_mode & FMODE_NOCMTIME) ioflags |= IO_INVIS; - ret = generic_segment_checks(iovp, &nr_segs, &size, VERIFY_WRITE); - if (ret < 0) - return ret; + size = iov_iter_count(iter); if (unlikely(ioflags & IO_ISDIRECT)) { xfs_buftarg_t *target = @@ -306,7 +303,7 @@ xfs_file_aio_read( trace_xfs_file_read(ip, size, pos, ioflags); - ret = generic_file_aio_read(iocb, iovp, nr_segs, pos); + ret = generic_file_read_iter(iocb, iter, pos); if (ret > 0) XFS_STATS_ADD(xs_read_bytes, ret); @@ -622,10 +619,9 @@ restart: STATIC ssize_t xfs_file_dio_aio_write( struct kiocb *iocb, - const struct iovec *iovp, - unsigned long nr_segs, + struct iov_iter *iter, loff_t pos, - size_t ocount) + size_t count) { struct file *file = iocb->ki_filp; struct address_space *mapping = file->f_mapping; @@ -633,7 +629,6 @@ xfs_file_dio_aio_write( struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; ssize_t ret = 0; - size_t count = ocount; int unaligned_io = 0; int iolock; struct xfs_buftarg *target = XFS_IS_REALTIME_INODE(ip) ? @@ -693,8 +688,8 @@ xfs_file_dio_aio_write( } trace_xfs_file_direct_write(ip, count, iocb->ki_pos, 0); - ret = generic_file_direct_write(iocb, iovp, - &nr_segs, pos, &iocb->ki_pos, count, ocount); + ret = generic_file_direct_write_iter(iocb, iter, + pos, &iocb->ki_pos, count); out: xfs_rw_iunlock(ip, iolock); @@ -707,10 +702,9 @@ out: STATIC ssize_t xfs_file_buffered_aio_write( struct kiocb *iocb, - const struct iovec *iovp, - unsigned long nr_segs, + struct iov_iter *iter, loff_t pos, - size_t ocount) + size_t count) { struct file *file = iocb->ki_filp; struct address_space *mapping = file->f_mapping; @@ -719,7 +713,6 @@ xfs_file_buffered_aio_write( ssize_t ret; int enospc = 0; int iolock = XFS_IOLOCK_EXCL; - size_t count = ocount; xfs_rw_ilock(ip, iolock); @@ -732,7 +725,7 @@ xfs_file_buffered_aio_write( write_retry: trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0); - ret = generic_file_buffered_write(iocb, iovp, nr_segs, + ret = generic_file_buffered_write_iter(iocb, iter, pos, &iocb->ki_pos, count, 0); /* @@ -753,10 +746,9 @@ out: } STATIC ssize_t -xfs_file_aio_write( +xfs_file_write_iter( struct kiocb *iocb, - const struct iovec *iovp, - unsigned long nr_segs, + struct iov_iter *iter, loff_t pos) { struct file *file = iocb->ki_filp; @@ -764,17 +756,15 @@ xfs_file_aio_write( struct inode *inode = mapping->host; struct xfs_inode *ip = XFS_I(inode); ssize_t ret; - size_t ocount = 0; + size_t count = 0; XFS_STATS_INC(xs_write_calls); BUG_ON(iocb->ki_pos != pos); - ret = generic_segment_checks(iovp, &nr_segs, &ocount, VERIFY_READ); - if (ret) - return ret; + count = iov_iter_count(iter); - if (ocount == 0) + if (count == 0) return 0; if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { @@ -783,10 +773,9 @@ xfs_file_aio_write( } if (unlikely(file->f_flags & O_DIRECT)) - ret = xfs_file_dio_aio_write(iocb, iovp, nr_segs, pos, ocount); + ret = xfs_file_dio_aio_write(iocb, iter, pos, count); else - ret = xfs_file_buffered_aio_write(iocb, iovp, nr_segs, pos, - ocount); + ret = xfs_file_buffered_aio_write(iocb, iter, pos, count); if (ret > 0) { ssize_t err; @@ -1411,8 +1400,8 @@ const struct file_operations xfs_file_operations = { .llseek = xfs_file_llseek, .read = do_sync_read, .write = do_sync_write, - .aio_read = xfs_file_aio_read, - .aio_write = xfs_file_aio_write, + .read_iter = xfs_file_read_iter, + .write_iter = xfs_file_write_iter, .splice_read = xfs_file_splice_read, .splice_write = xfs_file_splice_write, .unlocked_ioctl = xfs_file_ioctl, -- 2.39.5