Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

[linux.git] / fs / splice.c

diff --git a/fs/splice.c b/fs/splice.c
index 41cbb16299e0949984eb284887c22f77fff0390f..bfe62ae40f40920e6b95fa8ce16cc3130b8b0972 100644 (file)
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -523,6 +523,9 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
        loff_t isize, left;
        int ret;
 
+       if (IS_DAX(in->f_mapping->host))
+               return default_file_splice_read(in, ppos, pipe, len, flags);
+
        isize = i_size_read(in->f_mapping->host);
        if (unlikely(*ppos >= isize))
                return 0;
@@ -1158,7 +1161,7 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd,
        long ret, bytes;
        umode_t i_mode;
        size_t len;
-       int i, flags;
+       int i, flags, more;
 
        /*
         * We require the input being a regular file, as we don't want to
@@ -1201,6 +1204,7 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd,
         * Don't block on output, we have to drain the direct pipe.
         */
        sd->flags &= ~SPLICE_F_NONBLOCK;
+       more = sd->flags & SPLICE_F_MORE;
 
        while (len) {
                size_t read_len;
@@ -1213,6 +1217,15 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd,
                read_len = ret;
                sd->total_len = read_len;
 
+               /*
+                * If more data is pending, set SPLICE_F_MORE
+                * If this is the last data and SPLICE_F_MORE was not set
+                * initially, clears it.
+                */
+               if (read_len < len)
+                       sd->flags |= SPLICE_F_MORE;
+               else if (!more)
+                       sd->flags &= ~SPLICE_F_MORE;
                /*
                 * NOTE: nonblocking mode only applies to the input. We
                 * must not do the output in nonblocking mode as then we