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qa/btrfs/create_async_snap.c

 

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#include <stdlib.h>

 

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#include <unistd.h>

 

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#include <sys/types.h>

 

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#include <sys/stat.h>

 

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#include <fcntl.h>

 

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#include <errno.h>

 

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#include <stdio.h>

 

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#include <sys/ioctl.h>

 

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#include <string.h>

 

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#include <linux/ioctl.h>

 

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#include <linux/types.h>

 

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#include "../../src/os/btrfs_ioctl.h"

 

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struct btrfs_ioctl_vol_args_v2 va;

 

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int main(int argc, char **argv)

 

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{

 

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        int fd;

 

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        int r;

 

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        if (argc != 3) {

 

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                printf("usage: %s <source subvol> <name>\n", argv[0]);

 

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                return 1;

 

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        }

 

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        printf("creating snap ./%s from %s\n", argv[2], argv[1]);

 

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        fd = open(".", O_RDONLY);

 

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        va.fd = open(argv[1], O_RDONLY);

 

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        va.flags = BTRFS_SUBVOL_CREATE_ASYNC;

 

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        strcpy(va.name, argv[2]);

 

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        r = ioctl(fd, BTRFS_IOC_SNAP_CREATE_V2, (unsigned long long)&va);

 

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        printf("result %d\n", r ? -errno:0);

 

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        return r;

 

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}

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