diff options
| author | Tom Zanussi <zanussi@comcast.net> | 2008-05-09 15:28:36 +0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-05-28 16:49:27 +0400 |
| commit | a82c53a0e3f57f02782330372b7adad67b417645 (patch) | |
| tree | 3a4e65ab1a2420f8fc5d0091a6992d6f7e430ad8 | |
| parent | 1ec7d99c16e69a9ed8ffeaa6c1846025b84bebad (diff) | |
| download | linux-a82c53a0e3f57f02782330372b7adad67b417645.tar.xz | |
splice: fix sendfile() issue with relay
Splice isn't always incrementing the ppos correctly, which broke
relay splice.
Signed-off-by: Tom Zanussi <zanussi@comcast.net>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| -rw-r--r-- | fs/splice.c | 12 | ||||
| -rw-r--r-- | kernel/relay.c | 2 |
2 files changed, 9 insertions, 5 deletions
diff --git a/fs/splice.c b/fs/splice.c index 78150038b584..a048ad2130c3 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -983,7 +983,7 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd, while (len) { size_t read_len; - loff_t pos = sd->pos; + loff_t pos = sd->pos, prev_pos = pos; ret = do_splice_to(in, &pos, pipe, len, flags); if (unlikely(ret <= 0)) @@ -998,15 +998,19 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd, * could get stuck data in the internal pipe: */ ret = actor(pipe, sd); - if (unlikely(ret <= 0)) + if (unlikely(ret <= 0)) { + sd->pos = prev_pos; goto out_release; + } bytes += ret; len -= ret; sd->pos = pos; - if (ret < read_len) + if (ret < read_len) { + sd->pos = prev_pos + ret; goto out_release; + } } done: @@ -1072,7 +1076,7 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, ret = splice_direct_to_actor(in, &sd, direct_splice_actor); if (ret > 0) - *ppos += ret; + *ppos = sd.pos; return ret; } diff --git a/kernel/relay.c b/kernel/relay.c index bc24dcdc570f..7de644cdec43 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -1191,7 +1191,7 @@ static ssize_t relay_file_splice_read(struct file *in, ret = 0; spliced = 0; - while (len) { + while (len && !spliced) { ret = subbuf_splice_actor(in, ppos, pipe, len, flags, &nonpad_ret); if (ret < 0) break; |