diff options
Diffstat (limited to 'qemu-io.c')
| -rw-r--r-- | qemu-io.c | 31 |
1 files changed, 26 insertions, 5 deletions
@@ -1172,7 +1172,7 @@ static const cmdinfo_t close_cmd = { .oneline = "close the current open file", }; -static int openfile(char *name, int flags) +static int openfile(char *name, int flags, int growable) { if (bs) { fprintf(stderr, "file open already, try 'help close'\n"); @@ -1189,6 +1189,17 @@ static int openfile(char *name, int flags) return 1; } + + if (growable) { + if (!bs->drv || !bs->drv->protocol_name) { + fprintf(stderr, + "%s: only protocols can be opened growable\n", + progname); + return 1; + } + bs->growable = 1; + } + return 0; } @@ -1207,6 +1218,7 @@ open_help(void) " -r, -- open file read-only\n" " -s, -- use snapshot file\n" " -n, -- disable host cache\n" +" -g, -- allow file to grow (only applies to protocols)" "\n"); } @@ -1217,9 +1229,10 @@ open_f(int argc, char **argv) { int flags = 0; int readonly = 0; + int growable = 0; int c; - while ((c = getopt(argc, argv, "snCr")) != EOF) { + while ((c = getopt(argc, argv, "snCrg")) != EOF) { switch (c) { case 's': flags |= BDRV_O_SNAPSHOT; @@ -1233,6 +1246,9 @@ open_f(int argc, char **argv) case 'r': readonly = 1; break; + case 'g': + growable = 1; + break; default: return command_usage(&open_cmd); } @@ -1246,7 +1262,7 @@ open_f(int argc, char **argv) if (optind != argc - 1) return command_usage(&open_cmd); - return openfile(argv[optind], flags); + return openfile(argv[optind], flags, growable); } static const cmdinfo_t open_cmd = { @@ -1306,7 +1322,8 @@ static void usage(const char *name) int main(int argc, char **argv) { int readonly = 0; - const char *sopt = "hVc:Crsnm"; + int growable = 0; + const char *sopt = "hVc:Crsnmg"; struct option lopt[] = { { "help", 0, 0, 'h' }, { "version", 0, 0, 'V' }, @@ -1317,6 +1334,7 @@ int main(int argc, char **argv) { "snapshot", 0, 0, 's' }, { "nocache", 0, 0, 'n' }, { "misalign", 0, 0, 'm' }, + { "growable", 0, 0, 'g' }, { NULL, 0, 0, 0 } }; int c; @@ -1345,6 +1363,9 @@ int main(int argc, char **argv) case 'm': misalign = 1; break; + case 'g': + growable = 1; + break; case 'V': printf("%s version %s\n", progname, VERSION); exit(0); @@ -1392,7 +1413,7 @@ int main(int argc, char **argv) flags |= BDRV_O_RDWR; if ((argc - optind) == 1) - openfile(argv[optind], flags); + openfile(argv[optind], flags, growable); command_loop(); /* |