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-rw-r--r--btrfs-list.c148
-rw-r--r--cmds-subvolume.c14
2 files changed, 124 insertions, 38 deletions
diff --git a/btrfs-list.c b/btrfs-list.c
index edd12a4e..514cac7e 100644
--- a/btrfs-list.c
+++ b/btrfs-list.c
@@ -34,6 +34,7 @@
#include "ctree.h"
#include "transaction.h"
#include "utils.h"
+#include <uuid/uuid.h>
/* we store all the roots we find in an rbtree so that we can
* search for them later.
@@ -63,6 +64,8 @@ struct root_info {
/* creation time of this root in sec*/
time_t otime;
+ u8 uuid[BTRFS_UUID_SIZE];
+
/* path from the subvol we live in to this root, including the
* root's name. This is null until we do the extra lookup ioctl.
*/
@@ -188,7 +191,7 @@ static struct root_info *tree_search(struct rb_root *root, u64 root_id)
*/
static int add_root(struct root_lookup *root_lookup,
u64 root_id, u64 ref_tree, u64 dir_id, char *name,
- int name_len, u64 *gen, time_t ot)
+ int name_len, u64 *gen, time_t ot, void *uuid)
{
struct root_info *ri;
struct rb_node *ret;
@@ -210,6 +213,11 @@ static int add_root(struct root_lookup *root_lookup,
ri->gen = *gen;
ri->otime = ot;
+ if (uuid)
+ memcpy(&ri->uuid, uuid, BTRFS_UUID_SIZE);
+ else
+ memset(&ri->uuid, 0, BTRFS_UUID_SIZE);
+
ret = tree_insert(&root_lookup->root, root_id, ref_tree, gen,
&ri->rb_node);
if (ret) {
@@ -220,7 +228,7 @@ static int add_root(struct root_lookup *root_lookup,
}
static int update_root(struct root_lookup *root_lookup, u64 root_id, u64 gen,
- time_t ot)
+ time_t ot, void *uuid)
{
struct root_info *ri;
@@ -231,6 +239,11 @@ static int update_root(struct root_lookup *root_lookup, u64 root_id, u64 gen,
}
ri->gen = gen;
ri->otime = ot;
+ if (uuid)
+ memcpy(&ri->uuid, uuid, BTRFS_UUID_SIZE);
+ else
+ memset(&ri->uuid, 0, BTRFS_UUID_SIZE);
+
return 0;
}
@@ -665,6 +678,7 @@ static int __list_subvol_search(int fd, struct root_lookup *root_lookup)
int i;
int get_gen = 0;
time_t t;
+ u8 uuid[BTRFS_UUID_SIZE];
root_lookup_init(root_lookup);
memset(&args, 0, sizeof(args));
@@ -718,16 +732,20 @@ again:
dir_id = btrfs_stack_root_ref_dirid(ref);
add_root(root_lookup, sh->objectid, sh->offset,
- dir_id, name, name_len, NULL, 0);
+ dir_id, name, name_len, NULL, 0, NULL);
} else if (get_gen && sh->type == BTRFS_ROOT_ITEM_KEY) {
ri = (struct btrfs_root_item *)(args.buf + off);
gen = btrfs_root_generation(ri);
- if(ri->generation == ri->generation_v2)
+ if(ri->generation == ri->generation_v2) {
t = ri->otime.sec;
- else
+ memcpy(uuid, ri->uuid, BTRFS_UUID_SIZE);
+ } else {
t = 0;
+ memset(uuid, 0, BTRFS_UUID_SIZE);
+ }
- update_root(root_lookup, sh->objectid, gen, t);
+ update_root(root_lookup, sh->objectid, gen, t,
+ uuid);
}
off += sh->len;
@@ -818,19 +836,24 @@ static int __list_snapshot_search(int fd, struct root_lookup *root_lookup)
for (i = 0; i < sk->nr_items; i++) {
struct btrfs_root_item *item;
time_t t;
+ u8 uuid[BTRFS_UUID_SIZE];
+
sh = (struct btrfs_ioctl_search_header *)(args.buf +
off);
off += sizeof(*sh);
if (sh->type == BTRFS_ROOT_ITEM_KEY && sh->offset) {
item = (struct btrfs_root_item *)(args.buf + off);
- if(item->generation == item->generation_v2)
+ if(item->generation == item->generation_v2) {
t = item->otime.sec;
- else
+ memcpy(uuid, item->uuid, BTRFS_UUID_SIZE);
+ } else {
t = 0;
+ memset(uuid, 0, BTRFS_UUID_SIZE);
+ }
gen = sh->offset;
add_root(root_lookup, sh->objectid, 0,
- 0, NULL, 0, &gen, t);
+ 0, NULL, 0, &gen, t, uuid);
}
off += sh->len;
@@ -877,12 +900,13 @@ static int __list_subvol_fill_paths(int fd, struct root_lookup *root_lookup)
return 0;
}
-int list_subvols(int fd, int print_parent, int get_default)
+int list_subvols(int fd, int print_parent, int get_default, int print_uuid)
{
struct root_lookup root_lookup;
struct rb_node *n;
u64 default_id;
int ret;
+ char uuidparse[37];
if (get_default) {
ret = get_default_subvolid(fd, &default_id);
@@ -937,16 +961,44 @@ int list_subvols(int fd, int print_parent, int get_default)
resolve_root(&root_lookup, entry, &parent_id, &level, &path);
if (print_parent) {
- printf("ID %llu gen %llu parent %llu top level %llu path %s\n",
- (unsigned long long)entry->root_id,
- (unsigned long long)entry->gen,
- (unsigned long long)parent_id,
- (unsigned long long)level, path);
+ if (print_uuid) {
+ if (uuid_is_null(entry->uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(entry->uuid, uuidparse);
+ printf("ID %llu gen %llu parent %llu top level %llu"
+ " uuid %s path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)parent_id,
+ (unsigned long long)level,
+ uuidparse, path);
+ } else {
+ printf("ID %llu gen %llu parent %llu top level"
+ " %llu path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)parent_id,
+ (unsigned long long)level, path);
+ }
} else {
- printf("ID %llu gen %llu top level %llu path %s\n",
- (unsigned long long)entry->root_id,
- (unsigned long long)entry->gen,
- (unsigned long long)level, path);
+ if (print_uuid) {
+ if (uuid_is_null(entry->uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(entry->uuid, uuidparse);
+ printf("ID %llu gen %llu top level %llu"
+ " uuid %s path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)level,
+ uuidparse, path);
+ } else {
+ printf("ID %llu gen %llu top level %llu path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)level, path);
+ }
}
free(path);
@@ -956,7 +1008,7 @@ int list_subvols(int fd, int print_parent, int get_default)
return ret;
}
-int list_snapshots(int fd, int print_parent, int order)
+int list_snapshots(int fd, int print_parent, int order, int print_uuid)
{
struct root_lookup root_lookup;
struct root_lookup root_lookup_snap;
@@ -1001,6 +1053,7 @@ int list_snapshots(int fd, int print_parent, int order)
char *path;
time_t t;
char tstr[256];
+ char uuidparse[37];
entry_snap = rb_entry(n, struct root_info, rb_node);
entry = tree_search(&root_lookup.root, entry_snap->root_id);
@@ -1012,20 +1065,49 @@ int list_snapshots(int fd, int print_parent, int order)
else
strcpy(tstr,"-");
if (print_parent) {
- printf("ID %llu gen %llu cgen %llu parent %llu top level %llu "
- "otime %s path %s\n",
- (unsigned long long)entry->root_id,
- (unsigned long long)entry->gen,
- (unsigned long long)entry_snap->gen,
- (unsigned long long)parent_id,
- (unsigned long long)level, tstr, path);
+ if (print_uuid) {
+ if (uuid_is_null(entry->uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(entry->uuid, uuidparse);
+ printf("ID %llu gen %llu cgen %llu parent %llu"
+ " top level %llu otime %s uuid %s path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)entry_snap->gen,
+ (unsigned long long)parent_id,
+ (unsigned long long)level,
+ tstr, uuidparse, path);
+ } else {
+ printf("ID %llu gen %llu cgen %llu parent %llu"
+ " top level %llu otime %s path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)entry_snap->gen,
+ (unsigned long long)parent_id,
+ (unsigned long long)level, tstr, path);
+ }
} else {
- printf("ID %llu gen %llu cgen %llu top level %llu "
- "otime %s path %s\n",
- (unsigned long long)entry->root_id,
- (unsigned long long)entry->gen,
- (unsigned long long)entry_snap->gen,
- (unsigned long long)level, tstr, path);
+ if (print_uuid) {
+ if (uuid_is_null(entry->uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(entry->uuid, uuidparse);
+ printf("ID %llu gen %llu cgen %llu top level %llu "
+ "otime %s uuid %s path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)entry_snap->gen,
+ (unsigned long long)level,
+ tstr, uuidparse, path);
+ } else {
+ printf("ID %llu gen %llu cgen %llu top level %llu "
+ "otime %s path %s\n",
+ (unsigned long long)entry->root_id,
+ (unsigned long long)entry->gen,
+ (unsigned long long)entry_snap->gen,
+ (unsigned long long)level, tstr, path);
+ }
}
free(path);
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 8a81d36e..aaf5dde5 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -31,7 +31,7 @@
#include "commands.h"
/* btrfs-list.c */
-int list_subvols(int fd, int print_parent, int get_default);
+int list_subvols(int fd, int print_parent, int print_uuid, int get_default);
int find_updated_files(int fd, u64 root_id, u64 oldest_gen);
static const char * const subvolume_cmd_group_usage[] = {
@@ -278,10 +278,11 @@ static int cmd_subvol_list(int argc, char **argv)
int print_snap_only = 0;
int order = 0;
char *subvol;
+ int print_uuid = 0;
optind = 1;
while(1) {
- int c = getopt(argc, argv, "ps:");
+ int c = getopt(argc, argv, "ps:u");
if (c < 0)
break;
@@ -293,6 +294,9 @@ static int cmd_subvol_list(int argc, char **argv)
print_snap_only = 1;
order = atoi(optarg);
break;
+ case 'u':
+ print_uuid =1;
+ break;
default:
usage(cmd_subvol_list_usage);
}
@@ -319,9 +323,9 @@ static int cmd_subvol_list(int argc, char **argv)
return 12;
}
if (!print_snap_only)
- ret = list_subvols(fd, print_parent, 0);
+ ret = list_subvols(fd, print_parent, 0, print_uuid);
else
- ret = list_snapshots(fd, print_parent, order);
+ ret = list_snapshots(fd, print_parent, order, print_uuid);
if (ret)
return 19;
return 0;
@@ -502,7 +506,7 @@ static int cmd_subvol_get_default(int argc, char **argv)
fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
return 12;
}
- ret = list_subvols(fd, 0, 1);
+ ret = list_subvols(fd, 0, 1, 0);
if (ret)
return 19;
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 09:40:35 +0000