diff options
| -rw-r--r-- | qemu-io.c | 23 |
1 files changed, 21 insertions, 2 deletions
@@ -265,6 +265,18 @@ static int do_co_write_zeroes(int64_t offset, int count, int *total) } } +static int do_write_compressed(char *buf, int64_t offset, int count, int *total) +{ + int ret; + + ret = bdrv_write_compressed(bs, offset >> 9, (uint8_t *)buf, count >> 9); + if (ret < 0) { + return ret; + } + *total = count; + return 1; +} + static int do_load_vmstate(char *buf, int64_t offset, int count, int *total) { *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count); @@ -687,6 +699,7 @@ static void write_help(void) " Writes into a segment of the currently open file, using a buffer\n" " filled with a set pattern (0xcdcdcdcd).\n" " -b, -- write to the VM state rather than the virtual disk\n" +" -c, -- write compressed data with bdrv_write_compressed\n" " -p, -- use bdrv_pwrite to write the file\n" " -P, -- use different pattern to fill file\n" " -C, -- report statistics in a machine parsable format\n" @@ -703,7 +716,7 @@ static const cmdinfo_t write_cmd = { .cfunc = write_f, .argmin = 2, .argmax = -1, - .args = "[-bCpqz] [-P pattern ] off len", + .args = "[-bcCpqz] [-P pattern ] off len", .oneline = "writes a number of bytes at a specified offset", .help = write_help, }; @@ -712,6 +725,7 @@ static int write_f(int argc, char **argv) { struct timeval t1, t2; int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0; + int cflag = 0; int c, cnt; char *buf = NULL; int64_t offset; @@ -720,11 +734,14 @@ static int write_f(int argc, char **argv) int total = 0; int pattern = 0xcd; - while ((c = getopt(argc, argv, "bCpP:qz")) != EOF) { + while ((c = getopt(argc, argv, "bcCpP:qz")) != EOF) { switch (c) { case 'b': bflag = 1; break; + case 'c': + cflag = 1; + break; case 'C': Cflag = 1; break; @@ -801,6 +818,8 @@ static int write_f(int argc, char **argv) cnt = do_save_vmstate(buf, offset, count, &total); } else if (zflag) { cnt = do_co_write_zeroes(offset, count, &total); + } else if (cflag) { + cnt = do_write_compressed(buf, offset, count, &total); } else { cnt = do_write(buf, offset, count, &total); } |