Revision 1d45f8b5 block/nbd.c
| b/block/nbd.c | ||
|---|---|---|
| 33 | 33 |
#include <sys/types.h> |
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#include <unistd.h> |
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#define EN_OPTSTR ":exportname=" |
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|
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typedef struct BDRVNBDState {
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int sock; |
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off_t size; |
| ... | ... | |
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static int nbd_open(BlockDriverState *bs, const char* filename, int flags) |
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{
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BDRVNBDState *s = bs->opaque; |
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uint32_t nbdflags; |
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|
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char *file; |
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char *name; |
|
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const char *host; |
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const char *unixpath; |
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int sock; |
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off_t size; |
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size_t blocksize; |
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int ret; |
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int err = -EINVAL; |
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|
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file = qemu_strdup(filename); |
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if (!strstart(filename, "nbd:", &host)) |
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return -EINVAL; |
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name = strstr(file, EN_OPTSTR); |
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if (name) {
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if (name[strlen(EN_OPTSTR)] == 0) {
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goto out; |
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} |
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name[0] = 0; |
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name += strlen(EN_OPTSTR); |
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} |
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|
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if (!strstart(file, "nbd:", &host)) {
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goto out; |
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} |
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|
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if (strstart(host, "unix:", &unixpath)) {
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if (unixpath[0] != '/') |
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return -EINVAL; |
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if (unixpath[0] != '/') {
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goto out; |
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} |
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| 59 | 79 |
|
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sock = unix_socket_outgoing(unixpath); |
| 61 | 81 |
|
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} else {
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uint16_t port; |
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uint16_t port = NBD_DEFAULT_PORT;
|
|
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char *p, *r; |
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char hostname[128]; |
| 66 | 86 |
|
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pstrcpy(hostname, 128, host); |
| 68 | 88 |
|
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p = strchr(hostname, ':'); |
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if (p == NULL) |
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return -EINVAL; |
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if (p != NULL) {
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*p = '\0'; |
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p++; |
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|
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port = strtol(p, &r, 0); |
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if (r == p) {
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goto out; |
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} |
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} else if (name == NULL) {
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goto out; |
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} |
|
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*p = '\0'; |
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p++; |
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|
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port = strtol(p, &r, 0); |
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if (r == p) |
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return -EINVAL; |
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sock = tcp_socket_outgoing(hostname, port); |
| 80 | 103 |
} |
| 81 | 104 |
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if (sock == -1) |
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return -errno; |
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if (sock == -1) {
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err = -errno; |
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goto out; |
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} |
|
| 84 | 109 |
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ret = nbd_receive_negotiate(sock, &size, &blocksize); |
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if (ret == -1) |
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return -errno; |
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ret = nbd_receive_negotiate(sock, name, &nbdflags, &size, &blocksize); |
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if (ret == -1) {
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err = -errno; |
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goto out; |
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} |
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| 88 | 115 |
|
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s->sock = sock; |
| 90 | 117 |
s->size = size; |
| 91 | 118 |
s->blocksize = blocksize; |
| 119 |
err = 0; |
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| 92 | 120 |
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return 0; |
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out: |
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qemu_free(file); |
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return err; |
|
| 94 | 124 |
} |
| 95 | 125 |
|
| 96 | 126 |
static int nbd_read(BlockDriverState *bs, int64_t sector_num, |
Also available in: Unified diff