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author | Jens Axboe <axboe@suse.de> | 2006-04-19 15:57:05 +0200 |
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committer | Jens Axboe <axboe@suse.de> | 2006-04-19 15:57:05 +0200 |
commit | a4514ebd8e12c63c09ab02be518db545bd1d24af (patch) | |
tree | ec7bcaed8d4594bd9d763659686e9318158da3aa /fs | |
parent | [PATCH] tee: link_pipe() must be careful when dropping one of the pipe locks (diff) | |
download | linux-a4514ebd8e12c63c09ab02be518db545bd1d24af.tar.xz linux-a4514ebd8e12c63c09ab02be518db545bd1d24af.zip |
[PATCH] splice: offset fixes
- We need to adjust *ppos for writes as well.
- Copy back modified offset value if one was passed in, similar to
what sendfile does.
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/splice.c | 45 |
1 files changed, 30 insertions, 15 deletions
diff --git a/fs/splice.c b/fs/splice.c index 4f5e6b09fb26..27d6408ff490 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -720,22 +720,26 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out, ssize_t ret; ret = move_from_pipe(pipe, out, ppos, len, flags, pipe_to_file); - - /* - * If file or inode is SYNC and we actually wrote some data, sync it. - */ - if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(mapping->host)) - && ret > 0) { + if (ret > 0) { struct inode *inode = mapping->host; - int err; - mutex_lock(&inode->i_mutex); - err = generic_osync_inode(mapping->host, mapping, - OSYNC_METADATA|OSYNC_DATA); - mutex_unlock(&inode->i_mutex); + *ppos += ret; + + /* + * 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 = generic_osync_inode(inode, mapping, + OSYNC_METADATA|OSYNC_DATA); + mutex_unlock(&inode->i_mutex); - if (err) - ret = err; + if (err) + ret = err; + } } return ret; @@ -937,6 +941,7 @@ static long do_splice(struct file *in, loff_t __user *off_in, { struct pipe_inode_info *pipe; loff_t offset, *off; + long ret; pipe = in->f_dentry->d_inode->i_pipe; if (pipe) { @@ -951,7 +956,12 @@ static long do_splice(struct file *in, loff_t __user *off_in, } else off = &out->f_pos; - return do_splice_from(pipe, out, off, len, flags); + ret = do_splice_from(pipe, out, off, len, flags); + + if (off_out && copy_to_user(off_out, off, sizeof(loff_t))) + ret = -EFAULT; + + return ret; } pipe = out->f_dentry->d_inode->i_pipe; @@ -967,7 +977,12 @@ static long do_splice(struct file *in, loff_t __user *off_in, } else off = &in->f_pos; - return do_splice_to(in, off, pipe, len, flags); + ret = do_splice_to(in, off, pipe, len, flags); + + if (off_in && copy_to_user(off_in, off, sizeof(loff_t))) + ret = -EFAULT; + + return ret; } return -EINVAL; |