From 3dae8750c368f8ac11c3c8c2a28f56dcee865c01 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 3 Apr 2014 12:05:17 -0400 Subject: [PATCH] cifs: switch to ->write_iter() Signed-off-by: Al Viro --- fs/cifs/cifsfs.c | 31 +++++++++++++++---------------- fs/cifs/cifsfs.h | 6 ++---- fs/cifs/file.c | 40 ++++++++++++++++++---------------------- 3 files changed, 35 insertions(+), 42 deletions(-) diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index f0a567a344cf..496b520934e0 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -733,8 +733,7 @@ out_nls: goto out; } -static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) { struct inode *inode = file_inode(iocb->ki_filp); struct cifsInodeInfo *cinode = CIFS_I(inode); @@ -745,14 +744,14 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, if (written) return written; - written = generic_file_aio_write(iocb, iov, nr_segs, pos); + written = generic_file_write_iter(iocb, from); if (CIFS_CACHE_WRITE(CIFS_I(inode))) goto out; rc = filemap_fdatawrite(inode->i_mapping); if (rc) - cifs_dbg(FYI, "cifs_file_aio_write: %d rc on %p inode\n", + cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n", rc, inode); out: @@ -889,9 +888,9 @@ const struct inode_operations cifs_symlink_inode_ops = { const struct file_operations cifs_file_ops = { .read = new_sync_read, - .write = do_sync_write, + .write = new_sync_write, .read_iter = generic_file_read_iter, - .aio_write = cifs_file_aio_write, + .write_iter = cifs_file_write_iter, .open = cifs_open, .release = cifs_close, .lock = cifs_lock, @@ -908,9 +907,9 @@ const struct file_operations cifs_file_ops = { const struct file_operations cifs_file_strict_ops = { .read = new_sync_read, - .write = do_sync_write, + .write = new_sync_write, .read_iter = cifs_strict_readv, - .aio_write = cifs_strict_writev, + .write_iter = cifs_strict_writev, .open = cifs_open, .release = cifs_close, .lock = cifs_lock, @@ -928,9 +927,9 @@ const struct file_operations cifs_file_strict_ops = { const struct file_operations cifs_file_direct_ops = { /* BB reevaluate whether they can be done with directio, no cache */ .read = new_sync_read, - .write = do_sync_write, + .write = new_sync_write, .read_iter = cifs_user_readv, - .aio_write = cifs_user_writev, + .write_iter = cifs_user_writev, .open = cifs_open, .release = cifs_close, .lock = cifs_lock, @@ -947,9 +946,9 @@ const struct file_operations cifs_file_direct_ops = { const struct file_operations cifs_file_nobrl_ops = { .read = new_sync_read, - .write = do_sync_write, + .write = new_sync_write, .read_iter = generic_file_read_iter, - .aio_write = cifs_file_aio_write, + .write_iter = cifs_file_write_iter, .open = cifs_open, .release = cifs_close, .fsync = cifs_fsync, @@ -965,9 +964,9 @@ const struct file_operations cifs_file_nobrl_ops = { const struct file_operations cifs_file_strict_nobrl_ops = { .read = new_sync_read, - .write = do_sync_write, + .write = new_sync_write, .read_iter = cifs_strict_readv, - .aio_write = cifs_strict_writev, + .write_iter = cifs_strict_writev, .open = cifs_open, .release = cifs_close, .fsync = cifs_strict_fsync, @@ -984,9 +983,9 @@ const struct file_operations cifs_file_strict_nobrl_ops = { const struct file_operations cifs_file_direct_nobrl_ops = { /* BB reevaluate whether they can be done with directio, no cache */ .read = new_sync_read, - .write = do_sync_write, + .write = new_sync_write, .read_iter = cifs_user_readv, - .aio_write = cifs_user_writev, + .write_iter = cifs_user_writev, .open = cifs_open, .release = cifs_close, .fsync = cifs_fsync, diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index d1ef0415c645..c9e91886f0cf 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -87,10 +87,8 @@ extern int cifs_close(struct inode *inode, struct file *file); extern int cifs_closedir(struct inode *inode, struct file *file); extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to); extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to); -extern ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos); -extern ssize_t cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos); +extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from); +extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from); extern int cifs_lock(struct file *, int, struct file_lock *); extern int cifs_fsync(struct file *, loff_t, loff_t, int); extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 2ec7fce6d350..60e9b5fa2212 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2385,14 +2385,12 @@ cifs_uncached_retry_writev(struct cifs_writedata *wdata) } static ssize_t -cifs_iovec_write(struct file *file, const struct iovec *iov, - unsigned long nr_segs, loff_t *poffset) +cifs_iovec_write(struct file *file, struct iov_iter *from, loff_t *poffset) { unsigned long nr_pages, i; size_t bytes, copied, len, cur_len; ssize_t total_written = 0; loff_t offset; - struct iov_iter it; struct cifsFileInfo *open_file; struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb; @@ -2401,14 +2399,16 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, int rc; pid_t pid; - len = iov_length(iov, nr_segs); - if (!len) - return 0; - + len = iov_iter_count(from); rc = generic_write_checks(file, poffset, &len, 0); if (rc) return rc; + if (!len) + return 0; + + iov_iter_truncate(from, len); + INIT_LIST_HEAD(&wdata_list); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); open_file = file->private_data; @@ -2424,7 +2424,6 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, else pid = current->tgid; - iov_iter_init(&it, WRITE, iov, nr_segs, len); do { size_t save_len; @@ -2446,7 +2445,7 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, for (i = 0; i < nr_pages; i++) { bytes = min_t(size_t, cur_len, PAGE_SIZE); copied = copy_page_from_iter(wdata->pages[i], 0, bytes, - &it); + from); cur_len -= copied; /* * If we didn't copy as much as we expected, then that @@ -2545,11 +2544,11 @@ restart_loop: return total_written ? total_written : (ssize_t)rc; } -ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from) { ssize_t written; struct inode *inode; + loff_t pos = iocb->ki_pos; inode = file_inode(iocb->ki_filp); @@ -2559,7 +2558,7 @@ ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, * write request. */ - written = cifs_iovec_write(iocb->ki_filp, iov, nr_segs, &pos); + written = cifs_iovec_write(iocb->ki_filp, from, &pos); if (written > 0) { CIFS_I(inode)->invalid_mapping = true; iocb->ki_pos = pos; @@ -2569,8 +2568,7 @@ ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, } static ssize_t -cifs_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +cifs_writev(struct kiocb *iocb, struct iov_iter *from) { struct file *file = iocb->ki_filp; struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; @@ -2588,10 +2586,10 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov, mutex_lock(&inode->i_mutex); if (file->f_flags & O_APPEND) lock_pos = i_size_read(inode); - if (!cifs_find_lock_conflict(cfile, lock_pos, iov_length(iov, nr_segs), + if (!cifs_find_lock_conflict(cfile, lock_pos, iov_iter_count(from), server->vals->exclusive_lock_type, NULL, CIFS_WRITE_OP)) { - rc = __generic_file_aio_write(iocb, iov, nr_segs); + rc = __generic_file_write_iter(iocb, from); mutex_unlock(&inode->i_mutex); if (rc > 0) { @@ -2609,8 +2607,7 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov, } ssize_t -cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from) { struct inode *inode = file_inode(iocb->ki_filp); struct cifsInodeInfo *cinode = CIFS_I(inode); @@ -2628,11 +2625,10 @@ cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, if (cap_unix(tcon->ses) && (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) { - written = generic_file_aio_write( - iocb, iov, nr_segs, pos); + written = generic_file_write_iter(iocb, from); goto out; } - written = cifs_writev(iocb, iov, nr_segs, pos); + written = cifs_writev(iocb, from); goto out; } /* @@ -2641,7 +2637,7 @@ cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, * affected pages because it may cause a error with mandatory locks on * these pages but not on the region from pos to ppos+len-1. */ - written = cifs_user_writev(iocb, iov, nr_segs, pos); + written = cifs_user_writev(iocb, from); if (written > 0 && CIFS_CACHE_READ(cinode)) { /* * Windows 7 server can delay breaking level2 oplock if a write -- 2.20.1