diff options
Diffstat (limited to 'src/basic/copy.c')
| -rw-r--r-- | src/basic/copy.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/basic/copy.c b/src/basic/copy.c index b8cbe644d4..b20c178727 100644 --- a/src/basic/copy.c +++ b/src/basic/copy.c @@ -37,10 +37,14 @@ int copy_bytes(int fdf, int fdt, uint64_t max_bytes, bool try_reflink) { assert(fdt >= 0); /* Try btrfs reflinks first. */ - if (try_reflink && max_bytes == (uint64_t) -1) { + if (try_reflink && + max_bytes == (uint64_t) -1 && + lseek(fdf, 0, SEEK_CUR) == 0 && + lseek(fdt, 0, SEEK_CUR) == 0) { + r = btrfs_reflink(fdf, fdt); if (r >= 0) - return r; + return 0; /* we copied the whole thing, hence hit EOF, return 0 */ } for (;;) { @@ -50,7 +54,7 @@ int copy_bytes(int fdf, int fdt, uint64_t max_bytes, bool try_reflink) { if (max_bytes != (uint64_t) -1) { if (max_bytes <= 0) - return -EFBIG; + return 1; /* return > 0 if we hit the max_bytes limit */ if ((uint64_t) m > max_bytes) m = (size_t) max_bytes; @@ -75,7 +79,7 @@ int copy_bytes(int fdf, int fdt, uint64_t max_bytes, bool try_reflink) { /* The try splice, unless we already tried */ if (try_splice) { - n = splice(fdf, NULL, fdt, NULL, m, 0); + n = splice(fdf, NULL, fdt, NULL, m, 0); if (n < 0) { if (errno != EINVAL && errno != ENOSYS) return -errno; @@ -91,7 +95,7 @@ int copy_bytes(int fdf, int fdt, uint64_t max_bytes, bool try_reflink) { /* As a fallback just copy bits by hand */ { - char buf[m]; + uint8_t buf[m]; n = read(fdf, buf, m); if (n < 0) @@ -111,7 +115,7 @@ int copy_bytes(int fdf, int fdt, uint64_t max_bytes, bool try_reflink) { } } - return 0; + return 0; /* return 0 if we hit EOF earlier than the size limit */ } static int fd_copy_symlink(int df, const char *from, const struct stat *st, int dt, const char *to) { |