diff options
Diffstat (limited to 'source3/lib')
| -rw-r--r-- | source3/lib/sendfile.c | 77 |
1 files changed, 55 insertions, 22 deletions
diff --git a/source3/lib/sendfile.c b/source3/lib/sendfile.c index 23d1154718..6e093c31ff 100644 --- a/source3/lib/sendfile.c +++ b/source3/lib/sendfile.c @@ -34,7 +34,7 @@ #define MSG_MORE 0x8000 #endif -ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) +ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) { size_t total=0; ssize_t ret; @@ -48,7 +48,7 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off if (header) { hdr_len = header->length; while (total < hd_len) { - ret = sys_send(outfd, header->data + total,hdr_len - total, MSG_MORE); + ret = sys_send(tofd, header->data + total,hdr_len - total, MSG_MORE); if (ret == -1) return -1; total += ret; @@ -60,9 +60,9 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off ssize_t nwritten; do { #if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(SENDFILE64) - nwritten = sendfile64(outfd, infd, &offset, total); + nwritten = sendfile64(tofd, fromfd, &offset, total); #else - nwritten = sendfile(outfd, infd, &offset, total); + nwritten = sendfile(tofd, fromfd, &offset, total); #endif } while (nwritten == -1 && errno == EINTR); if (nwritten == -1) @@ -76,7 +76,7 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off #elif defined(SOLARIS_SENDFILE_API) -ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) +ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) { } @@ -85,7 +85,7 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off #include <sys/socket.h> #include <sys/uio.h> -ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) +ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) { size_t total=0; struct iovec hdtrl[2]; @@ -115,9 +115,9 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off do { #if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(SENDFILE64) - nwritten = sendfile64(outfd, infd, offset, total, &hdtrl[0], 0); + nwritten = sendfile64(tofd, fromfd, offset, total, &hdtrl[0], 0); #else - nwritten = sendfile(outfd, infd, offset, total, &hdtrl[0], 0); + nwritten = sendfile(tofd, fromfd, offset, total, &hdtrl[0], 0); #endif } while (nwritten == -1 && errno == EINTR); if (nwritten == -1) @@ -155,11 +155,12 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off #include <sys/socket.h> #include <sys/uio.h> -ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) +ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) { size_t total=0; struct sf_hdtr hdr; struct iovec hdtrl; + size_t hdr_len = 0; hdr->headers = &hdtrl; hdr->hdr_cnt = 1; @@ -167,29 +168,61 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off hdr->trl_cnt = 0; /* Set up the header iovec. */ - hdtrl.iov_base = header->data; - hdtrl.iov_len = header->length; + if (header) { + hdtrl.iov_base = header->data; + hdtrl.iov_len = hdr_len = header->length; + } else { + hdtrl.iov_base = NULL; + hdtrl.iov_len = 0; + } total = count; - while (total) { - ssize_t nwritten; + while (total + hdtrl.iov_len) { + SMB_OFF_T nwritten; + int ret; + + /* + * FreeBSD sendfile returns 0 on success, -1 on error. + * Remember, the tofd and fromfd are reversed..... :-). + * nwritten includes the header data sent. + */ + do { -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(SENDFILE64) - nwritten = sendfile64(outfd, infd, &offset, total, &hdr, NULL, 0); -#else - nwritten = sendfile(outfd, infd, &offset, total, &hdr, NULL, 0); -#endif - } while (nwritten == -1 && errno == EINTR); - if (nwritten == -1) + ret = sendfile(fromfd, tofd, offset, total, &hdr, &nwritten, 0); + } while (ret == -1 && errno == EINTR); + if (ret == -1) return -1; + + if (nwritten == 0) + return -1; /* I think we're at EOF here... */ + + /* + * If this was a short (signal interrupted) write we may need + * to subtract it from the header data, or null out the header + * data altogether if we wrote more than hdtrl.iov_len bytes. + * We change nwritten to be the number of file bytes written. + */ + + if (hdtrl[0].iov_base && hdtrl.iov_len) { + if (nwritten >= hdtrl.iov_len) { + nwritten -= hdtrl.iov_len; + hdtrl.iov_base = NULL; + hdtrl.iov_len = 0; + } else { + nwritten = 0; + hdtrl.iov_base += nwritten; + hdtrl.iov_len -= nwritten; + } + } total -= nwritten; + offset += nwritten; } - return count + header->length; + return count + hdr_len; } #else /* No sendfile implementation. Return error. */ -ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) +ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count) { /* No sendfile syscall. */ errno = ENOSYS; |