From abbb65899aecfc97bda64b6816d1e501754cfe1f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 27 May 2017 11:16:52 +0300 Subject: [PATCH] fs: implement vfs_iter_write using do_iter_write De-dupliate some code and allow for passing the flags argument to vfs_iter_write. Additionally it now properly updates timestamps. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- drivers/block/loop.c | 2 +- drivers/target/target_core_file.c | 4 ++-- fs/coda/file.c | 2 +- fs/read_write.c | 29 +++++++++-------------------- fs/splice.c | 2 +- include/linux/fs.h | 3 ++- 6 files changed, 16 insertions(+), 26 deletions(-) diff --git a/drivers/block/loop.c b/drivers/block/loop.c index b64649bec64e..2a0d997efda4 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -266,7 +266,7 @@ static int lo_write_bvec(struct file *file, struct bio_vec *bvec, loff_t *ppos) iov_iter_bvec(&i, ITER_BVEC, bvec, 1, bvec->bv_len); file_start_write(file); - bw = vfs_iter_write(file, &i, ppos); + bw = vfs_iter_write(file, &i, ppos, 0); file_end_write(file); if (likely(bw == bvec->bv_len)) diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c index 2befc0d7fdb1..e921948415c7 100644 --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -273,7 +273,7 @@ static int fd_do_rw(struct se_cmd *cmd, struct file *fd, iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); if (is_write) - ret = vfs_iter_write(fd, &iter, &pos); + ret = vfs_iter_write(fd, &iter, &pos, 0); else ret = vfs_iter_read(fd, &iter, &pos, 0); @@ -409,7 +409,7 @@ fd_execute_write_same(struct se_cmd *cmd) } iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); - ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos); + ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos, 0); kfree(bvec); if (ret < 0 || ret != len) { diff --git a/fs/coda/file.c b/fs/coda/file.c index f1102822bcfd..363402fcb3ed 100644 --- a/fs/coda/file.c +++ b/fs/coda/file.c @@ -51,7 +51,7 @@ coda_file_write_iter(struct kiocb *iocb, struct iov_iter *to) host_file = cfi->cfi_container; file_start_write(host_file); inode_lock(coda_inode); - ret = vfs_iter_write(cfi->cfi_container, to, &iocb->ki_pos); + ret = vfs_iter_write(cfi->cfi_container, to, &iocb->ki_pos, 0); coda_inode->i_size = file_inode(host_file)->i_size; coda_inode->i_blocks = (coda_inode->i_size + 511) >> 9; coda_inode->i_mtime = coda_inode->i_ctime = current_time(coda_inode); diff --git a/fs/read_write.c b/fs/read_write.c index 4dab30b62f0e..acfd3dc63d57 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -356,26 +356,6 @@ out_putf: } #endif -ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos) -{ - struct kiocb kiocb; - ssize_t ret; - - if (!file->f_op->write_iter) - return -EINVAL; - - init_sync_kiocb(&kiocb, file); - kiocb.ki_pos = *ppos; - - iter->type |= WRITE; - ret = call_write_iter(file, &kiocb, iter); - BUG_ON(ret == -EIOCBQUEUED); - if (ret > 0) - *ppos = kiocb.ki_pos; - return ret; -} -EXPORT_SYMBOL(vfs_iter_write); - int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t count) { struct inode *inode; @@ -962,6 +942,15 @@ static ssize_t do_iter_write(struct file *file, struct iov_iter *iter, return ret; } +ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos, + int flags) +{ + if (!file->f_op->write_iter) + return -EINVAL; + return do_iter_write(file, iter, ppos, flags); +} +EXPORT_SYMBOL(vfs_iter_write); + ssize_t vfs_readv(struct file *file, const struct iovec __user *vec, unsigned long vlen, loff_t *pos, int flags) { diff --git a/fs/splice.c b/fs/splice.c index 540c4a44756c..ae41201d0325 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -762,7 +762,7 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out, iov_iter_bvec(&from, ITER_BVEC | WRITE, array, n, sd.total_len - left); - ret = vfs_iter_write(out, &from, &sd.pos); + ret = vfs_iter_write(out, &from, &sd.pos, 0); if (ret <= 0) break; diff --git a/include/linux/fs.h b/include/linux/fs.h index 3f6a4f4efb32..c67f1f8ee789 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2791,7 +2791,8 @@ extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t); ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos, int flags); -ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos); +ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos, + int flags); /* fs/block_dev.c */ extern ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to); -- 2.20.1