#include <sys/statfs.h>
#include <linux/magic.h>
#include <getopt.h>
+#include <sys/utsname.h>
+#include <linux/version.h>
#include "kerncompat.h"
#include "radix-tree.h"
crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
- btrfs_csum_final(crc, (char *)&sb->csum[0]);
+ btrfs_csum_final(crc, &sb->csum[0]);
ret = pwrite(fd, sb, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
if (ret < BTRFS_SUPER_INFO_SIZE)
ret = (ret < 0 ? -errno : -EIO);
}
} else {
uuid_generate(super.fsid);
- if (cfg->fs_uuid)
- uuid_unparse(super.fsid, cfg->fs_uuid);
+ uuid_unparse(super.fsid, cfg->fs_uuid);
}
uuid_generate(super.dev_item.uuid);
uuid_generate(chunk_tree_uuid);
return ret;
}
+#define VERSION_TO_STRING3(a,b,c) #a "." #b "." #c, KERNEL_VERSION(a,b,c)
+#define VERSION_TO_STRING2(a,b) #a "." #b, KERNEL_VERSION(a,b,0)
+
+/*
+ * Feature stability status and versions: compat <= safe <= default
+ */
static const struct btrfs_fs_feature {
const char *name;
u64 flag;
+ const char *sysfs_name;
+ /*
+ * Compatibility with kernel of given version. Filesystem can be
+ * mounted.
+ */
+ const char *compat_str;
+ u32 compat_ver;
+ /*
+ * Considered safe for use, but is not on by default, even if the
+ * kernel supports the feature.
+ */
+ const char *safe_str;
+ u32 safe_ver;
+ /*
+ * Considered safe for use and will be turned on by default if
+ * supported by the running kernel.
+ */
+ const char *default_str;
+ u32 default_ver;
const char *desc;
} mkfs_features[] = {
{ "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
+ "mixed_groups",
+ VERSION_TO_STRING3(2,6,37),
+ VERSION_TO_STRING3(2,6,37),
+ NULL, 0,
"mixed data and metadata block groups" },
{ "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
+ "extended_iref",
+ VERSION_TO_STRING2(3,7),
+ VERSION_TO_STRING2(3,12),
+ VERSION_TO_STRING2(3,12),
"increased hardlink limit per file to 65536" },
{ "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
+ "raid56",
+ VERSION_TO_STRING2(3,9),
+ NULL, 0,
+ NULL, 0,
"raid56 extended format" },
{ "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
+ "skinny_metadata",
+ VERSION_TO_STRING2(3,10),
+ VERSION_TO_STRING2(3,18),
+ VERSION_TO_STRING2(3,18),
"reduced-size metadata extent refs" },
{ "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
+ "no_holes",
+ VERSION_TO_STRING2(3,14),
+ VERSION_TO_STRING2(4,0),
+ NULL, 0,
"no explicit hole extents for files" },
/* Keep this one last */
{ "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
fprintf(stderr, "Filesystem features available:\n");
for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
- char *is_default = "";
+ const struct btrfs_fs_feature *feat = &mkfs_features[i];
- if (mkfs_features[i].flag & mask_disallowed)
+ if (feat->flag & mask_disallowed)
continue;
- 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);
+ fprintf(stderr, "%-20s- %s (0x%llx", feat->name, feat->desc,
+ feat->flag);
+ if (feat->compat_ver)
+ fprintf(stderr, ", compat=%s", feat->compat_str);
+ if (feat->safe_ver)
+ fprintf(stderr, ", safe=%s", feat->safe_str);
+ if (feat->default_ver)
+ fprintf(stderr, ", default=%s", feat->default_str);
+ fprintf(stderr, ")\n");
}
}
return NULL;
}
+void print_kernel_version(FILE *stream, u32 version)
+{
+ u32 v[3];
+
+ v[0] = version & 0xFF;
+ v[1] = (version >> 8) & 0xFF;
+ v[2] = version >> 16;
+ fprintf(stream, "%u.%u", v[2], v[1]);
+ if (v[0])
+ fprintf(stream, ".%u", v[0]);
+}
+
+u32 get_running_kernel_version(void)
+{
+ struct utsname utsbuf;
+ char *tmp;
+ char *saveptr = NULL;
+ u32 version;
+
+ uname(&utsbuf);
+ if (strcmp(utsbuf.sysname, "Linux") != 0) {
+ error("unsupported system: %s", utsbuf.sysname);
+ exit(1);
+ }
+ /* 1.2.3-4-name */
+ tmp = strchr(utsbuf.release, '-');
+ if (tmp)
+ *tmp = 0;
+
+ tmp = strtok_r(utsbuf.release, ".", &saveptr);
+ if (!string_is_numerical(tmp))
+ return (u32)-1;
+ version = atoi(tmp) << 16;
+ tmp = strtok_r(NULL, ".", &saveptr);
+ if (!string_is_numerical(tmp))
+ return (u32)-1;
+ version |= atoi(tmp) << 8;
+ tmp = strtok_r(NULL, ".", &saveptr);
+ if (tmp) {
+ if (!string_is_numerical(tmp))
+ return (u32)-1;
+ version |= atoi(tmp);
+ }
+
+ return version;
+}
+
u64 btrfs_device_size(int fd, struct stat *st)
{
u64 size;
}
int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, int fd, char *path,
+ struct btrfs_root *root, int fd, const char *path,
u64 device_total_bytes, u32 io_width, u32 io_align,
u32 sectorsize)
{
btrfs_set_stack_timespec_nsec(&inode_item.ctime, 0);
btrfs_set_stack_timespec_sec(&inode_item.mtime, now);
btrfs_set_stack_timespec_nsec(&inode_item.mtime, 0);
- btrfs_set_stack_timespec_sec(&inode_item.otime, 0);
+ btrfs_set_stack_timespec_sec(&inode_item.otime, now);
btrfs_set_stack_timespec_nsec(&inode_item.otime, 0);
if (root->fs_info->tree_root == root)
/* scan other devices */
if (is_btrfs && total_devs > 1) {
- ret = btrfs_scan_lblkid();
+ ret = btrfs_scan_devices();
if (ret)
return ret;
}
/*
* Register all devices in the fs_uuid list created in the user
- * space. Ensure btrfs_scan_lblkid() is called before this func.
+ * space. Ensure btrfs_scan_devices() is called before this func.
*/
int btrfs_register_all_devices(void)
{
fd = open(p, O_RDONLY);
if (fd < 0)
goto err;
- ret = lookup_ino_rootid(fd, &id);
+ ret = lookup_path_rootid(fd, &id);
if (ret)
error("failed to lookup root id: %s", strerror(-ret));
close(fd);
*
* Returns 0 on success, or a negative errno.
*/
-int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
+int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
struct btrfs_ioctl_dev_info_args **di_ret)
{
int fd = -1;
int ret = 0;
int ndevs = 0;
- int i = 0;
+ u64 last_devid = 0;
int replacing = 0;
struct btrfs_fs_devices *fs_devices_mnt = NULL;
struct btrfs_ioctl_dev_info_args *di_args;
if (is_block_device(path) == 1) {
struct btrfs_super_block *disk_super;
char buf[BTRFS_SUPER_INFO_SIZE];
- u64 devid;
/* Ensure it's mounted, then set path to the mountpoint */
fd = open(path, O_RDONLY);
ret = -EIO;
goto out;
}
- devid = btrfs_stack_device_id(&disk_super->dev_item);
-
- fi_args->max_id = devid;
- i = devid;
+ last_devid = btrfs_stack_device_id(&disk_super->dev_item);
+ fi_args->max_id = last_devid;
memcpy(fi_args->fsid, fs_devices_mnt->fsid, BTRFS_FSID_SIZE);
close(fd);
fi_args->num_devices++;
ndevs++;
replacing = 1;
- if (i == 0)
- i++;
+ if (last_devid == 0)
+ last_devid++;
}
}
if (replacing)
memcpy(di_args, &tmp, sizeof(tmp));
- for (; i <= fi_args->max_id; ++i) {
- ret = get_device_info(fd, i, &di_args[ndevs]);
+ for (; last_devid <= fi_args->max_id; last_devid++) {
+ ret = get_device_info(fd, last_devid, &di_args[ndevs]);
if (ret == -ENODEV)
continue;
if (ret)
return 0;
}
-int btrfs_scan_lblkid(void)
+int btrfs_scan_devices(void)
{
int fd = -1;
int ret;
* - BTRFS_EMPTY_SUBVOL_DIR_OBJECTID (directory with ino == 2) the result is
* undefined and function returns -1
*/
-int lookup_ino_rootid(int fd, u64 *rootid)
+int lookup_path_rootid(int fd, u64 *rootid)
{
struct btrfs_ioctl_ino_lookup_args args;
int ret;
return result;
}
+/*
+ * Check if the BTRFS_IOC_TREE_SEARCH_V2 ioctl is supported on a given
+ * filesystem, opened at fd
+ */
int btrfs_tree_search2_ioctl_supported(int fd)
{
struct btrfs_ioctl_search_args_v2 *args2;
int args2_size = 1024;
char args2_buf[args2_size];
int ret;
- static int v2_supported = -1;
-
- if (v2_supported != -1)
- return v2_supported;
args2 = (struct btrfs_ioctl_search_args_v2 *)args2_buf;
sk = &(args2->key);
args2->buf_size = args2_size - sizeof(struct btrfs_ioctl_search_args_v2);
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH_V2, args2);
if (ret == -EOPNOTSUPP)
- v2_supported = 0;
+ return 0;
else if (ret == 0)
- v2_supported = 1;
- else
- return ret;
-
- return v2_supported;
+ return 1;
+ return ret;
}
int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features)
int string_is_numerical(const char *str)
{
+ if (!str)
+ return 0;
if (!(*str >= '0' && *str <= '9'))
return 0;
while (*str >= '0' && *str <= '9')
goto out;
ret = btrfs_list_get_path_rootid(fd, &sv_id);
- if (ret) {
- error("can't get rootid for '%s'", fullpath);
+ if (ret)
goto out;
- }
mntfd = btrfs_open_dir(mnt, &dirstream2, 1);
if (mntfd < 0)
goto out;
- if (sv_id == BTRFS_FS_TREE_OBJECTID) {
- ret = 2;
- /*
- * So that caller may decide if thats an error or just fine.
- */
- goto out;
- }
-
memset(get_ri, 0, sizeof(*get_ri));
get_ri->root_id = sv_id;
- ret = btrfs_get_subvol(mntfd, get_ri);
+ if (sv_id == BTRFS_FS_TREE_OBJECTID)
+ ret = btrfs_get_toplevel_subvol(mntfd, get_ri);
+ else
+ ret = btrfs_get_subvol(mntfd, get_ri);
if (ret)
error("can't find '%s': %d", svpath, ret);
projects / platform / upstream / btrfs-progs.git / blobdiff