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root |
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include <inttypes.h> |
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#include <unistd.h> |
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#include <endian.h> |
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#include <sys/ioctl.h> |
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#include <netinet/in.h> |
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#include <byteswap.h> |
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typedef uint32_t u32; |
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typedef uint64_t u64; |
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#include <linux/nbd.h> |
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#if __BYTE_ORDER == __BIG_ENDIAN |
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#define ntohll(netlong) (netlong) |
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#elif __BYTE_ORDER == __LITTLE_ENDIAN |
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#define ntohll(netlong) __bswap_64(netlong) |
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#else |
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error, you should not exist |
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#endif |
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MODULE = Linux::NBD PACKAGE = Linux::NBD::Client |
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void |
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_set_sock (int dev, int fd) |
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CODE: |
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ioctl (dev, NBD_SET_SOCK, (unsigned long)fd); |
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void |
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_doit (int dev, int doexit = 0) |
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CODE: |
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ioctl (dev, NBD_DO_IT); |
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if (doexit) |
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_exit (0); |
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void |
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_disconnect (int dev) |
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CODE: |
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ioctl (dev, NBD_DISCONNECT); |
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void |
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_clear_sock (int dev) |
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CODE: |
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ioctl (dev, NBD_CLEAR_SOCK); |
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void |
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_clear_que (int dev) |
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CODE: |
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ioctl (dev, NBD_CLEAR_QUE); |
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void |
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_set_blksize (int dev, unsigned long blocksize) |
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CODE: |
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ioctl (dev, NBD_SET_BLKSIZE, blocksize); |
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void |
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_set_size (int dev, unsigned long size) |
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CODE: |
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ioctl (dev, NBD_SET_BLKSIZE, size); |
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void |
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_set_size_blocks (int dev, unsigned long nblocks) |
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CODE: |
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ioctl (dev, NBD_SET_SIZE_BLOCKS, nblocks); |
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MODULE = Linux::NBD PACKAGE = Linux::NBD::Server |
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void |
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_one_request (SV *obj, int fd) |
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CODE: |
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struct nbd_request req; |
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if (read (fd, &req, sizeof (req)) == sizeof (req)) |
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{ |
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if (req.magic == htonl (NBD_REQUEST_MAGIC)) |
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{ |
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if (req.type < 2) |
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{ |
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u64 from = ntohll (req.from); |
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PUSHMARK (SP); |
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EXTEND (SP, 3); |
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PUSHs (obj); |
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PUSHs (sv_2mortal (newSVpvn (req.handle, sizeof (req.handle)))); |
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PUSHs (sv_2mortal (sizeof (UV) < 8 && from > (0xffffffffUL) |
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? newSVnv (from) |
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: newSVuv (from))); |
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PUSHs (sv_2mortal (newSVuv (ntohl (req.len)))); |
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PUTBACK; |
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call_method (req.type ? "req_write" : "req_read", G_DISCARD); |
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SPAGAIN; |
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XSRETURN_NO; |
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} |
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} |
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} |
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XSRETURN_YES; |
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SV * |
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_format_reply (SV *handle, unsigned int error = 0, SV *data = 0) |
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CODE: |
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struct nbd_reply rep; |
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STRLEN len; |
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char *h = SvPV (handle, len); |
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if (len != sizeof (rep.handle)) |
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croak ("format_reply: illegal handle (length %d, should be %d)", len, sizeof (rep.handle)); |
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rep.magic = htonl (NBD_REPLY_MAGIC); |
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rep.error = htonl (error); |
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memcpy (rep.handle, h, sizeof (rep.handle)); |
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RETVAL = newSVpvn ((char *)&rep, sizeof (rep)); |
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if (data && !error) |
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sv_catsv (RETVAL, data); |
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OUTPUT: |
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RETVAL |
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