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btrfs-progs: btrfs_scan_block_devices is unused function delete it 

After Patch:
 remove BTRFS_SCAN_PROC scan method
There isn't any consumer for btrfs_scan_block_devices() so delete it.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Anand Jain 2014-10-07 08:08:31 +08:00 committed by David Sterba
parent f4fac5d46e
commit e9b5ff23ea
2 changed files with 0 additions and 89 deletions
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88
utils.c
View File

@ -1709,94 +1709,6 @@ int set_label(const char *btrfs_dev, const char *label)
return ret;
}
int btrfs_scan_block_devices(int run_ioctl)
{
struct stat st;
int ret;
int fd;
struct btrfs_fs_devices *tmp_devices;
u64 num_devices;
FILE *proc_partitions;
int i;
char buf[1024];
char fullpath[110];
int scans = 0;
int special;
scan_again:
proc_partitions = fopen("/proc/partitions","r");
if (!proc_partitions) {
fprintf(stderr, "Unable to open '/proc/partitions' for scanning\n");
return -ENOENT;
}
/* skip the header */
for (i = 0; i < 2; i++)
if (!fgets(buf, 1023, proc_partitions)) {
fprintf(stderr,
"Unable to read '/proc/partitions' for scanning\n");
fclose(proc_partitions);
return -ENOENT;
}
strcpy(fullpath,"/dev/");
while(fgets(buf, 1023, proc_partitions)) {
ret = sscanf(buf," %*d %*d %*d %99s", fullpath + 5);
if (ret != 1) {
fprintf(stderr,
"failed to scan device name from /proc/partitions\n");
break;
}
/*
* multipath and MD devices may register as a btrfs filesystem
* both through the original block device and through
* the special (/dev/mapper or /dev/mdX) entry.
* This scans the special entries last
*/
special = strncmp(fullpath, "/dev/dm-", strlen("/dev/dm-")) == 0;
if (!special)
special = strncmp(fullpath, "/dev/md", strlen("/dev/md")) == 0;
if (scans == 0 && special)
continue;
if (scans > 0 && !special)
continue;
ret = lstat(fullpath, &st);
if (ret < 0) {
fprintf(stderr, "failed to stat %s\n", fullpath);
continue;
}
if (!S_ISBLK(st.st_mode)) {
continue;
}
fd = open(fullpath, O_RDONLY);
if (fd < 0) {
if (errno != ENOMEDIUM)
fprintf(stderr, "failed to open %s: %s\n",
fullpath, strerror(errno));
continue;
}
ret = btrfs_scan_one_device(fd, fullpath, &tmp_devices,
&num_devices,
BTRFS_SUPER_INFO_OFFSET, 0);
if (ret == 0 && run_ioctl > 0) {
btrfs_register_one_device(fullpath);
}
close(fd);
}
fclose(proc_partitions);
if (scans == 0) {
scans++;
goto scan_again;
}
return 0;
}
/*
* Unsafe subvolume check.
*

1
utils.h
View File

@ -121,7 +121,6 @@ int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mo
})
int get_mountpt(char *dev, char *mntpt, size_t size);
int btrfs_scan_block_devices(int run_ioctl);
u64 parse_size(char *s);
u64 parse_qgroupid(const char *p);
u64 arg_strtou64(const char *str);