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author | Lukas Larsson <[email protected]> | 2011-12-02 15:08:47 +0100 |
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committer | Lukas Larsson <[email protected]> | 2011-12-02 15:08:47 +0100 |
commit | f30ac8e5a84c550734b79a6d66639c4d3489c6fd (patch) | |
tree | 331a81551b21d75c41b5edc25b9077bfe2a8cf70 /erts/emulator/drivers/unix/unix_efile.c | |
parent | 7bd9c1f9a68a024958040fe5b77dacc73bb6c5ab (diff) | |
parent | 62fffa75e2003b3f19eb7614307942028a400fd1 (diff) | |
download | otp-f30ac8e5a84c550734b79a6d66639c4d3489c6fd.tar.gz otp-f30ac8e5a84c550734b79a6d66639c4d3489c6fd.tar.bz2 otp-f30ac8e5a84c550734b79a6d66639c4d3489c6fd.zip |
Merge branch 'ta/sendfile/OTP-9240'
* ta/sendfile/OTP-9240: (31 commits)
Add sendfile server printouts
Skip recv/send during tests for fallback platforms
Remove header/trailer support
Remove windows implementation
Expand sendfile documentation
Only allow tcp sockets as target for sendfile
Move sendfile api to file module
Preliminary work on header/trailer
Use free_sendfile explicitly for non-async
Remove debug printouts
Add tests for send/recv/sendfile interactions
Remove tests for file_server sendfile
sendfile caller now has to be the controlling_process
Remove support for file_server, sendfile has to be raw
Set chunk size to 3 GB
Change type of fd to be ErlDrvEvent
Add ifdef's for HAVE_SENDFILE
Fix freebsd support for sendfile
Change nbytes to 64 bit
Implement ignorefd for TCP
...
Diffstat (limited to 'erts/emulator/drivers/unix/unix_efile.c')
-rw-r--r-- | erts/emulator/drivers/unix/unix_efile.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c index 4b3934657c..72911641d3 100644 --- a/erts/emulator/drivers/unix/unix_efile.c +++ b/erts/emulator/drivers/unix/unix_efile.c @@ -33,6 +33,9 @@ #include <sys/types.h> #include <sys/uio.h> #endif +#if defined(HAVE_SENDFILE) && (defined(__linux__) || (defined(__sun) && defined(__SVR4))) +#include <sys/sendfile.h> +#endif #if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__) #define DARWIN 1 @@ -1464,3 +1467,77 @@ efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset, return check_error(0, errInfo); #endif } + +#ifdef HAVE_SENDFILE +#define SENDFILE_CHUNK_SIZE ((1 << 30) -1) + +/* + * sendfile: The implementation of the sendfile system call varies + * a lot on different *nix platforms so to make the api similar in all + * we have to emulate some things in linux and play with variables on + * bsd/darwin. + * + * It could be possible to implement header/trailer in sendfile, though + * you would have to emulate it in linux and on BSD/Darwin some complex + * calculations have to be made when using a non blocking socket to figure + * out how much of the header/file/trailer was sent in each command. + */ + +int +efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd, + off_t *offset, Uint64 *nbytes, struct t_sendfile_hdtl* hdtl) +{ + Uint64 written = 0; +#if defined(__linux__) || (defined(__sun) && defined(__SVR4)) + ssize_t retval; + do { + // check if *nbytes is 0 or greater than the largest size_t + if (*nbytes == 0 || *nbytes > SENDFILE_CHUNK_SIZE) + retval = sendfile(out_fd, in_fd, offset, SENDFILE_CHUNK_SIZE); + else + retval = sendfile(out_fd, in_fd, offset, *nbytes); + if (retval > 0) { + written += retval; + *nbytes -= retval; + } + } while (retval != -1 && retval == SENDFILE_CHUNK_SIZE); + *nbytes = written; + return check_error(retval == -1 ? -1 : 0, errInfo); +#elif defined(DARWIN) + int retval; + off_t len; + do { + // check if *nbytes is 0 or greater than the largest off_t + if(*nbytes > SENDFILE_CHUNK_SIZE) + len = SENDFILE_CHUNK_SIZE; + else + len = *nbytes; + retval = sendfile(in_fd, out_fd, *offset, &len, NULL, 0); + if (retval != -1 || errno == EAGAIN || errno == EINTR) { + *offset += len; + *nbytes -= len; + written += len; + } + } while (len == SENDFILE_CHUNK_SIZE); + *nbytes = written; + return check_error(retval, errInfo); +#elif defined(__FreeBSD__) || defined(__DragonFly__) + off_t len; + int retval; + do { + if (*nbytes > SENDFILE_CHUNK_SIZE) + retval = sendfile(in_fd, out_fd, *offset, SENDFILE_CHUNK_SIZE, + NULL, &len, 0); + else + retval = sendfile(in_fd, out_fd, *offset, *nbytes, NULL, &len, 0); + if (retval != -1 || errno == EAGAIN || errno == EINTR) { + *offset += len; + *nbytes -= len; + written += len; + } + } while(len == SENDFILE_CHUNK_SIZE); + *nbytes = written; + return check_error(retval, errInfo); +#endif +} +#endif /* HAVE_SENDFILE */ |