diff options
Diffstat (limited to 'fs/ocfs2')
-rw-r--r-- | fs/ocfs2/file.c | 94 |
1 files changed, 74 insertions, 20 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 8672b9536039..c2a87c885b73 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1912,6 +1912,22 @@ out_sems: return written ? written : ret; } +static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, + struct file *out, + struct splice_desc *sd) +{ + int ret; + + ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, &sd->pos, + sd->total_len, 0, NULL); + if (ret < 0) { + mlog_errno(ret); + return ret; + } + + return splice_from_pipe_feed(pipe, sd, pipe_to_file); +} + static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, struct file *out, loff_t *ppos, @@ -1919,38 +1935,76 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, unsigned int flags) { int ret; - struct inode *inode = out->f_path.dentry->d_inode; + struct address_space *mapping = out->f_mapping; + struct inode *inode = mapping->host; + struct splice_desc sd = { + .total_len = len, + .flags = flags, + .pos = *ppos, + .u.file = out, + }; mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, (unsigned int)len, out->f_path.dentry->d_name.len, out->f_path.dentry->d_name.name); - mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT); + if (pipe->inode) + mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); - ret = ocfs2_rw_lock(inode, 1); - if (ret < 0) { - mlog_errno(ret); - goto out; - } + splice_from_pipe_begin(&sd); + do { + ret = splice_from_pipe_next(pipe, &sd); + if (ret <= 0) + break; - ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0, - NULL); - if (ret < 0) { - mlog_errno(ret); - goto out_unlock; - } + mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); + ret = ocfs2_rw_lock(inode, 1); + if (ret < 0) + mlog_errno(ret); + else { + ret = ocfs2_splice_to_file(pipe, out, &sd); + ocfs2_rw_unlock(inode, 1); + } + mutex_unlock(&inode->i_mutex); + } while (ret > 0); + splice_from_pipe_end(pipe, &sd); if (pipe->inode) - mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_CHILD); - ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags); - if (pipe->inode) mutex_unlock(&pipe->inode->i_mutex); -out_unlock: - ocfs2_rw_unlock(inode, 1); -out: - mutex_unlock(&inode->i_mutex); + if (sd.num_spliced) + ret = sd.num_spliced; + + if (ret > 0) { + unsigned long nr_pages; + + *ppos += ret; + nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + + /* + * If file or inode is SYNC and we actually wrote some data, + * sync it. + */ + if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) { + int err; + + mutex_lock(&inode->i_mutex); + err = ocfs2_rw_lock(inode, 1); + if (err < 0) { + mlog_errno(err); + } else { + err = generic_osync_inode(inode, mapping, + OSYNC_METADATA|OSYNC_DATA); + ocfs2_rw_unlock(inode, 1); + } + mutex_unlock(&inode->i_mutex); + + if (err) + ret = err; + } + balance_dirty_pages_ratelimited_nr(mapping, nr_pages); + } mlog_exit(ret); return ret; |