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btrfs-progs: sb-mod: add preliminary support for non-u64 types 

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-04-06 18:36:32 +02:00
parent 23df5de0d0
commit b5e0ca64a4
1 changed files with 26 additions and 7 deletions
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33
btrfs-sb-mod.c
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@ -110,6 +110,7 @@ struct fspec {
enum field_type {
TYPE_UNKNOWN,
TYPE_U64,
TYPE_U16,
};
struct sb_field {
@ -125,19 +126,37 @@ struct sb_field {
{ .name = "uuid_tree_generation", .type = TYPE_U64 },
};
#define MOD_FIELD(fname, set, val) \
#define MOD_FIELD_XX(fname, set, val, bits, f_dec, f_hex, f_type) \
else if (strcmp(name, #fname) == 0) { \
if (set) { \
printf("SET: %s %llu (0x%llx)\n", #fname, \
(unsigned long long)*val, (unsigned long long)*val); \
sb->fname = cpu_to_le64(*val); \
printf("SET: "#fname" "f_dec" (0x"f_hex")\n", \
(f_type)*val, (f_type)*val); \
sb->fname = cpu_to_le##bits(*val); \
} else { \
*val = le64_to_cpu(sb->fname); \
printf("GET: %s %llu (0x%llx)\n", #fname, \
(unsigned long long)*val, (unsigned long long)*val); \
*val = le##bits##_to_cpu(sb->fname); \
printf("GET: "#fname" "f_dec" (0x"f_hex")\n", \
(f_type)*val, (f_type)*val); \
} \
}
#define MOD_FIELD64(fname, set, val) \
MOD_FIELD_XX(fname, set, val, 64, "%llu", "%llx", unsigned long long)
/* Alias for u64 */
#define MOD_FIELD(fname, set, val) MOD_FIELD64(fname, set, val)
/*
* Support only GET and SET properly, ADD and SUB may work
*/
#define MOD_FIELD32(fname, set, val) \
MOD_FIELD_XX(fname, set, val, 32, "%u", "%x", unsigned int)
#define MOD_FIELD16(fname, set, val) \
MOD_FIELD_XX(fname, set, val, 16, "%hu", "%hx", unsigned short int)
#define MOD_FIELD8(fname, set, val) \
MOD_FIELD_XX(fname, set, val, 8, "%hhu", "%hhx", unsigned char)
static void mod_field_by_name(struct btrfs_super_block *sb, int set, const char *name,
u64 *val)
{