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btrfs-progs: mkfs: fix regression preventing --rootdir to create file 

Commit 460e93f257 ("btrfs-progs: mkfs: check the status of file at mkfs")
will try to check the file state before creating fs on it.

The check is mostly fine for normal mkfs case, while for --rootdir
option, it's allowed to create a new file if the destination file
doesn't exist.

Fix it by allowing non-existent file if --rootdir is specified.

Fixes: 460e93f257 ("btrfs-progs: mkfs: check the status of file at mkfs")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2017-11-29 16:07:34 +08:00 committed by David Sterba
parent 1c9c5f7fb3
commit 0855a8cd43
3 changed files with 20 additions and 2 deletions
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6
mkfs/main.c
View File

@ -720,7 +720,7 @@ int main(int argc, char **argv)
u32 stripesize = 4096;
int zero_end = 1;
int fd = -1;
int ret;
int ret = 0;
int close_ret;
int i;
int mixed = 0;
@ -888,7 +888,9 @@ int main(int argc, char **argv)
while (dev_cnt-- > 0) {
file = argv[optind++];
if (is_block_device(file) == 1)
if (source_dir_set && is_path_exist(file) == 0)
ret = 0;
else if (is_block_device(file) == 1)
ret = test_dev_for_mkfs(file, force_overwrite);
else
ret = test_status_for_mkfs(file, force_overwrite);

15
utils.c
View File

@ -456,6 +456,21 @@ static int is_reg_file(const char *path)
return S_ISREG(statbuf.st_mode);
}
int is_path_exist(const char *path)
{
struct stat statbuf;
int ret;
ret = stat(path, &statbuf);
if (ret < 0) {
if (errno == ENOENT)
return 0;
else
return -errno;
}
return 1;
}
/*
* This function checks if the given input parameter is
* an uuid or a path

1
utils.h
View File

@ -122,6 +122,7 @@ int set_label(const char *btrfs_dev, const char *label);
char *__strncpy_null(char *dest, const char *src, size_t n);
int is_block_device(const char *file);
int is_mount_point(const char *file);
int is_path_exist(const char *file);
int check_arg_type(const char *input);
int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only);