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btrfs-progs: introduce test_issubvolname() for simplicity

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There are many duplicated codes to check if the given string is
correct subvolume name. Introduce test_issubvolname() for this
purpose for simplicity.

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: David Sterba <dsterba@suse.cz>
Cc: Mike Fleetwood <mike.fleetwood@googlemail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Satoru Takeuchi 2014-08-01 11:44:21 +09:00 committed by David Sterba
parent f0884b5dc3
commit 91b3334057
3 changed files with 16 additions and 6 deletions
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9
cmds-subvolume.c
View File

@ -126,8 +126,7 @@ static int cmd_subvol_create(int argc, char **argv)
dupdir = strdup(dst);
dstdir = dirname(dupdir);
if (!strcmp(newname, ".") || !strcmp(newname, "..") ||
strchr(newname, '/') ){
if (!test_issubvolname(newname)) {
fprintf(stderr, "ERROR: incorrect subvolume name '%s'\n",
newname);
goto out;
@ -301,8 +300,7 @@ again:
vname = basename(dupvname);
free(cpath);
if (!strcmp(vname, ".") || !strcmp(vname, "..") ||
strchr(vname, '/')) {
if (!test_issubvolname(vname)) {
fprintf(stderr, "ERROR: incorrect subvolume name '%s'\n",
vname);
ret = 1;
@ -672,8 +670,7 @@ static int cmd_snapshot(int argc, char **argv)
dstdir = dirname(dupdir);
}
if (!strcmp(newname, ".") || !strcmp(newname, "..") ||
strchr(newname, '/') ){
if (!test_issubvolname(newname)) {
fprintf(stderr, "ERROR: incorrect snapshot name '%s'\n",
newname);
goto out;

12
utils.c
View File

@ -2405,3 +2405,15 @@ int test_minimum_size(const char *file, u32 leafsize)
close(fd);
return 0;
}
/*
* test if name is a correct subvolume name
* this function return
* 0-> name is not a correct subvolume name
* 1-> name is a correct subvolume name
*/
int test_issubvolname(const char *name)
{
return name[0] != '\0' && !strchr(name, '/') &&
strcmp(name, ".") && strcmp(name, "..");
}

1
utils.h
View File

@ -116,6 +116,7 @@ int get_device_info(int fd, u64 devid,
int test_uuid_unique(char *fs_uuid);
int test_minimum_size(const char *file, u32 leafsize);
int test_issubvolname(const char *name);
/*
* Btrfs minimum size calculation is complicated, it should include at least: