diff options
Diffstat (limited to 'cmds-balance.c')
| -rw-r--r-- | cmds-balance.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/cmds-balance.c b/cmds-balance.c index 374e9817..e9e388e8 100644 --- a/cmds-balance.c +++ b/cmds-balance.c @@ -20,6 +20,9 @@ #include <unistd.h> #include <getopt.h> #include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> #include <errno.h> #include "kerncompat.h" @@ -507,6 +510,7 @@ static const char * const cmd_balance_start_usage[] = { "-v be verbose", "-f force reducing of metadata integrity", "--full-balance do not print warning and do not delay start", + "--background run the balance as a background process", NULL }; @@ -517,13 +521,15 @@ static int cmd_balance_start(int argc, char **argv) &args.meta, NULL }; int force = 0; int verbose = 0; + int background = 0; unsigned start_flags = 0; int i; memset(&args, 0, sizeof(args)); while (1) { - enum { GETOPT_VAL_FULL_BALANCE = 256 }; + enum { GETOPT_VAL_FULL_BALANCE = 256, + GETOPT_VAL_BACKGROUND = 257 }; static const struct option longopts[] = { { "data", optional_argument, NULL, 'd'}, { "metadata", optional_argument, NULL, 'm' }, @@ -532,6 +538,8 @@ static int cmd_balance_start(int argc, char **argv) { "verbose", no_argument, NULL, 'v' }, { "full-balance", no_argument, NULL, GETOPT_VAL_FULL_BALANCE }, + { "background", no_argument, NULL, + GETOPT_VAL_BACKGROUND }, { NULL, 0, NULL, 0 } }; @@ -570,6 +578,9 @@ static int cmd_balance_start(int argc, char **argv) case GETOPT_VAL_FULL_BALANCE: start_flags |= BALANCE_START_NOWARN; break; + case GETOPT_VAL_BACKGROUND: + background = 1; + break; default: usage(cmd_balance_start_usage); } @@ -622,6 +633,35 @@ static int cmd_balance_start(int argc, char **argv) args.flags |= BTRFS_BALANCE_FORCE; if (verbose) dump_ioctl_balance_args(&args); + if (background) { + switch (fork()) { + case (-1): + error("unable to fork to run balance in background"); + return 1; + case (0): + setsid(); + switch(fork()) { + case (-1): + error( + "unable to fork to run balance in background"); + exit(1); + case (0): + chdir("/"); + close(0); + close(1); + close(2); + open("/dev/null", O_RDONLY); + open("/dev/null", O_WRONLY); + open("/dev/null", O_WRONLY); + break; + default: + exit(0); + } + break; + default: + exit(0); + } + } return do_balance(argv[optind], &args, start_flags); } |