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btrfs-progs
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btrfs-progs: move feature parsing from mkfs to utils 

We'll use them in convert as well. Move defines and the interface
functions to utils.*.

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba 2015-03-23 19:20:37 +01:00
parent a297698edc
commit 7ea86ad282
3 changed files with 101 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
mkfs.c
View File

@ -44,9 +44,6 @@
static u64 index_cnt = 2;
#define DEFAULT_MKFS_FEATURES (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
struct directory_name_entry {
char *dir_name;
char *path;
@ -1103,97 +1100,6 @@ static int is_ssd(const char *file)
return !atoi((const char *)&rotational);
}
#define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
static const struct btrfs_fs_feature {
const char *name;
u64 flag;
const char *desc;
} mkfs_features[] = {
{ "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
"mixed data and metadata block groups" },
{ "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
"increased hardlink limit per file to 65536" },
{ "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
"raid56 extended format" },
{ "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
"reduced-size metadata extent refs" },
{ "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
"no explicit hole extents for files" },
/* Keep this one last */
{ "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
};
static void list_all_fs_features(void)
{
int i;
fprintf(stderr, "Filesystem features available at mkfs time:\n");
for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
char *is_default = "";
if (mkfs_features[i].flag & DEFAULT_MKFS_FEATURES)
is_default = ", default";
fprintf(stderr, "%-20s- %s (0x%llx%s)\n",
mkfs_features[i].name,
mkfs_features[i].desc,
mkfs_features[i].flag,
is_default);
}
}
static int parse_one_fs_feature(const char *name, u64 *flags)
{
int i;
int found = 0;
for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
if (name[0] == '^' &&
!strcmp(mkfs_features[i].name, name + 1)) {
*flags &= ~ mkfs_features[i].flag;
found = 1;
} else if (!strcmp(mkfs_features[i].name, name)) {
*flags |= mkfs_features[i].flag;
found = 1;
}
}
return !found;
}
static void process_fs_features(u64 flags)
{
int i;
for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
if (flags & mkfs_features[i].flag) {
printf("Turning ON incompat feature '%s': %s\n",
mkfs_features[i].name,
mkfs_features[i].desc);
}
}
}
/*
* Return NULL if all features were parsed fine, otherwise return the name of
* the first unparsed.
*/
static char* parse_fs_features(char *namelist, u64 *flags)
{
char *this_char;
char *save_ptr = NULL; /* Satisfy static checkers */
for (this_char = strtok_r(namelist, ",", &save_ptr);
this_char != NULL;
this_char = strtok_r(NULL, ",", &save_ptr)) {
if (parse_one_fs_feature(this_char, flags))
return this_char;
}
return NULL;
}
int main(int ac, char **av)
{
char *file;
@ -1232,7 +1138,7 @@ int main(int ac, char **av)
int saved_optind;
char estr[100];
char *fs_uuid = NULL;
u64 features = DEFAULT_MKFS_FEATURES;
u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
while(1) {
int c;
@ -1292,7 +1198,7 @@ int main(int ac, char **av)
char *orig = strdup(optarg);
char *tmp = orig;
tmp = parse_fs_features(tmp, &features);
tmp = btrfs_parse_fs_features(tmp, &features);
if (tmp) {
fprintf(stderr,
"Unrecognized filesystem feature '%s'\n",
@ -1302,7 +1208,7 @@ int main(int ac, char **av)
}
free(orig);
if (features & BTRFS_FEATURE_LIST_ALL) {
list_all_fs_features();
btrfs_list_all_fs_features();
exit(0);
}
break;
@ -1536,7 +1442,7 @@ int main(int ac, char **av)
features |= BTRFS_FEATURE_INCOMPAT_RAID56;
}
process_fs_features(features);
btrfs_process_fs_features(features);
ret = make_btrfs(fd, file, label, fs_uuid, blocks, dev_block_count,
nodesize, sectorsize, stripesize, features);

88
utils.c
View File

@ -555,6 +555,94 @@ out:
return ret;
}
static const struct btrfs_fs_feature {
const char *name;
u64 flag;
const char *desc;
} mkfs_features[] = {
{ "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
"mixed data and metadata block groups" },
{ "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
"increased hardlink limit per file to 65536" },
{ "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
"raid56 extended format" },
{ "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
"reduced-size metadata extent refs" },
{ "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
"no explicit hole extents for files" },
/* Keep this one last */
{ "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
};
static int parse_one_fs_feature(const char *name, u64 *flags)
{
int i;
int found = 0;
for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
if (name[0] == '^' &&
!strcmp(mkfs_features[i].name, name + 1)) {
*flags &= ~ mkfs_features[i].flag;
found = 1;
} else if (!strcmp(mkfs_features[i].name, name)) {
*flags |= mkfs_features[i].flag;
found = 1;
}
}
return !found;
}
void btrfs_process_fs_features(u64 flags)
{
int i;
for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
if (flags & mkfs_features[i].flag) {
printf("Turning ON incompat feature '%s': %s\n",
mkfs_features[i].name,
mkfs_features[i].desc);
}
}
}
void btrfs_list_all_fs_features(void)
{
int i;
fprintf(stderr, "Filesystem features available at mkfs time:\n");
for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
char *is_default = "";
if (mkfs_features[i].flag & BTRFS_MKFS_DEFAULT_FEATURES)
is_default = ", default";
fprintf(stderr, "%-20s- %s (0x%llx%s)\n",
mkfs_features[i].name,
mkfs_features[i].desc,
mkfs_features[i].flag,
is_default);
}
}
/*
* Return NULL if all features were parsed fine, otherwise return the name of
* the first unparsed.
*/
char* btrfs_parse_fs_features(char *namelist, u64 *flags)
{
char *this_char;
char *save_ptr = NULL; /* Satisfy static checkers */
for (this_char = strtok_r(namelist, ",", &save_ptr);
this_char != NULL;
this_char = strtok_r(NULL, ",", &save_ptr)) {
if (parse_one_fs_feature(this_char, flags))
return this_char;
}
return NULL;
}
u64 btrfs_device_size(int fd, struct stat *st)
{
u64 size;

9
utils.h
View File

@ -26,6 +26,11 @@
#define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
#define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024)
#define BTRFS_MKFS_DEFAULT_NODE_SIZE 16384
#define BTRFS_MKFS_DEFAULT_FEATURES \
(BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
#define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
#define BTRFS_SCAN_MOUNTED (1ULL << 0)
#define BTRFS_SCAN_LBLKID (1ULL << 1)
@ -80,6 +85,10 @@ void set_argv0(char **argv);
void units_set_mode(unsigned *units, unsigned mode);
void units_set_base(unsigned *units, unsigned base);
void btrfs_list_all_fs_features(void);
char* btrfs_parse_fs_features(char *namelist, u64 *flags);
void btrfs_process_fs_features(u64 flags);
int make_btrfs(int fd, const char *device, const char *label,
char *fs_uuid, u64 blocks[6], u64 num_bytes, u32 nodesize,
u32 sectorsize, u32 stripesize, u64 features);