diff options
| author | Lennart Poettering <lennart@poettering.net> | 2014-12-12 03:20:53 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2014-12-12 13:35:32 +0100 |
| commit | 0254b455e9730691e9f90d53afe860a0f3229f6d (patch) | |
| tree | 24a0db68b4816f5538b705eca11b7e8ada3bee7c | |
| parent | f9ac15442e4132f00eca5495d53c17062aae13e0 (diff) | |
copy: teach copy_bytes() btrfs reflink magic
| -rw-r--r-- | src/shared/copy.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/shared/copy.c b/src/shared/copy.c index f22a940991..4c41f2fdd4 100644 --- a/src/shared/copy.c +++ b/src/shared/copy.c @@ -27,10 +27,18 @@ int copy_bytes(int fdf, int fdt, off_t max_bytes) { bool try_sendfile = true; + int r; assert(fdf >= 0); assert(fdt >= 0); + /* Try btrfs reflinks first. */ + if (max_bytes == (off_t) -1) { + r = btrfs_reflink(fdf, fdt); + if (r >= 0) + return 0; + } + for (;;) { size_t m = PIPE_BUF; ssize_t n; @@ -64,7 +72,6 @@ int copy_bytes(int fdf, int fdt, off_t max_bytes) { /* As a fallback just copy bits by hand */ { char buf[m]; - int r; n = read(fdf, buf, m); if (n < 0) @@ -72,7 +79,7 @@ int copy_bytes(int fdf, int fdt, off_t max_bytes) { if (n == 0) /* EOF */ break; - r = loop_write(fdt, buf, n, false); + r = loop_write(fdt, buf, (size_t) n, false); if (r < 0) return r; |