#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"
static int rand_seed_initlized = 0;
static unsigned short rand_seed[3];
+struct btrfs_config bconf;
+
const char *get_argv0_buf(void)
{
return argv0_buf;
struct cache_extent *cache;
int found = 0;
- BUG_ON(!ret_start);
+ ASSERT(ret_start != NULL);
cache = first_cache_extent(free_tree);
while (cache) {
if (cache->size > len) {
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);
*
* For now sys chunk array will be empty and dev_item is empty too.
* They will be re-initialized at temp chunk tree setup.
+ *
+ * The superblock signature is not valid, denotes a partially created
+ * filesystem, needs to be finalized.
*/
static int setup_temp_super(int fd, struct btrfs_mkfs_config *cfg,
u64 root_bytenr, u64 chunk_bytenr)
struct btrfs_super_block *super = (struct btrfs_super_block *)super_buf;
int ret;
- /*
- * We rely on cfg->chunk_uuid and cfg->fs_uuid to pass uuid
- * for other functions.
- * Caller must allocate space for them
- */
- BUG_ON(!cfg->chunk_uuid || !cfg->fs_uuid);
memset(super_buf, 0, BTRFS_SUPER_INFO_SIZE);
cfg->num_bytes = round_down(cfg->num_bytes, cfg->sectorsize);
- if (cfg->fs_uuid && *cfg->fs_uuid) {
+ if (*cfg->fs_uuid) {
if (uuid_parse(cfg->fs_uuid, super->fsid) != 0) {
error("cound not parse UUID: %s", cfg->fs_uuid);
ret = -EINVAL;
btrfs_set_super_bytenr(super, cfg->super_bytenr);
btrfs_set_super_num_devices(super, 1);
- btrfs_set_super_magic(super, BTRFS_MAGIC);
+ btrfs_set_super_magic(super, BTRFS_MAGIC_PARTIAL);
btrfs_set_super_generation(super, 1);
btrfs_set_super_root(super, root_bytenr);
btrfs_set_super_chunk_root(super, chunk_bytenr);
unsigned char chunk_uuid[BTRFS_UUID_SIZE];
int ret;
- /* We rely on cfg->fs_uuid and chunk_uuid to fsid and chunk uuid */
- BUG_ON(!cfg->fs_uuid || !cfg->chunk_uuid);
ret = uuid_parse(cfg->fs_uuid, fsid);
if (ret)
return -EINVAL;
* Provided bytenr must in ascending order, or tree root will have a
* bad key order.
*/
- BUG_ON(!(root_bytenr < extent_bytenr && extent_bytenr < dev_bytenr &&
- dev_bytenr < fs_bytenr && fs_bytenr < csum_bytenr));
+ if (!(root_bytenr < extent_bytenr && extent_bytenr < dev_bytenr &&
+ dev_bytenr < fs_bytenr && fs_bytenr < csum_bytenr)) {
+ error("bad tree bytenr order: "
+ "root < extent %llu < %llu, "
+ "extent < dev %llu < %llu, "
+ "dev < fs %llu < %llu, "
+ "fs < csum %llu < %llu",
+ (unsigned long long)root_bytenr,
+ (unsigned long long)extent_bytenr,
+ (unsigned long long)extent_bytenr,
+ (unsigned long long)dev_bytenr,
+ (unsigned long long)dev_bytenr,
+ (unsigned long long)fs_bytenr,
+ (unsigned long long)fs_bytenr,
+ (unsigned long long)csum_bytenr);
+ return -EINVAL;
+ }
buf = malloc(sizeof(*buf) + cfg->nodesize);
if (!buf)
return -ENOMEM;
*/
if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
char *cur;
+ u32 array_size;
- cur = (char *)sb->sys_chunk_array + sb->sys_chunk_array_size;
+ cur = (char *)sb->sys_chunk_array
+ + btrfs_super_sys_array_size(sb);
memcpy(cur, &disk_key, sizeof(disk_key));
cur += sizeof(disk_key);
read_extent_buffer(buf, cur, (unsigned long int)chunk,
btrfs_chunk_item_size(1));
- sb->sys_chunk_array_size += btrfs_chunk_item_size(1) +
+ array_size = btrfs_super_sys_array_size(sb);
+ array_size += btrfs_chunk_item_size(1) +
sizeof(disk_key);
+ btrfs_set_super_sys_array_size(sb, array_size);
ret = write_temp_super(fd, sb, cfg->super_bytenr);
}
int ret;
/* Must ensure SYS chunk starts before META chunk */
- BUG_ON(meta_chunk_start < sys_chunk_start);
+ if (meta_chunk_start < sys_chunk_start) {
+ error("wrong chunk order: meta < system %llu < %llu",
+ (unsigned long long)meta_chunk_start,
+ (unsigned long long)sys_chunk_start);
+ return -EINVAL;
+ }
buf = malloc(sizeof(*buf) + cfg->nodesize);
if (!buf)
return -ENOMEM;
int ret;
/* Must ensure SYS chunk starts before META chunk */
- BUG_ON(meta_chunk_start < sys_chunk_start);
+ if (meta_chunk_start < sys_chunk_start) {
+ error("wrong chunk order: meta < system %llu < %llu",
+ (unsigned long long)meta_chunk_start,
+ (unsigned long long)sys_chunk_start);
+ return -EINVAL;
+ }
buf = malloc(sizeof(*buf) + cfg->nodesize);
if (!buf)
return -ENOMEM;
* We must ensure provided bytenr are in ascending order,
* or extent tree key order will be broken.
*/
- BUG_ON(!(chunk_bytenr < root_bytenr && root_bytenr < extent_bytenr &&
- extent_bytenr < dev_bytenr && dev_bytenr < fs_bytenr &&
- fs_bytenr < csum_bytenr));
+ if (!(chunk_bytenr < root_bytenr && root_bytenr < extent_bytenr &&
+ extent_bytenr < dev_bytenr && dev_bytenr < fs_bytenr &&
+ fs_bytenr < csum_bytenr)) {
+ error("bad tree bytenr order: "
+ "chunk < root %llu < %llu, "
+ "root < extent %llu < %llu, "
+ "extent < dev %llu < %llu, "
+ "dev < fs %llu < %llu, "
+ "fs < csum %llu < %llu",
+ (unsigned long long)chunk_bytenr,
+ (unsigned long long)root_bytenr,
+ (unsigned long long)root_bytenr,
+ (unsigned long long)extent_bytenr,
+ (unsigned long long)extent_bytenr,
+ (unsigned long long)dev_bytenr,
+ (unsigned long long)dev_bytenr,
+ (unsigned long long)fs_bytenr,
+ (unsigned long long)fs_bytenr,
+ (unsigned long long)csum_bytenr);
+ return -EINVAL;
+ }
buf = malloc(sizeof(*buf) + cfg->nodesize);
if (!buf)
return -ENOMEM;
* Split into small blocks and reuse codes.
* TODO: Reuse tree operation facilities by introducing new flags
*/
-static int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
+int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
struct btrfs_convert_context *cctx)
{
struct cache_tree *free = &cctx->free;
/*
* @fs_uuid - if NULL, generates a UUID, returns back the new filesystem UUID
+ *
+ * The superblock signature is not valid, denotes a partially created
+ * filesystem, needs to be finalized.
*/
-int make_btrfs(int fd, struct btrfs_mkfs_config *cfg,
- struct btrfs_convert_context *cctx)
+int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
{
struct btrfs_super_block super;
struct extent_buffer *buf;
BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
u64 num_bytes;
- if (cctx)
- return make_convert_btrfs(fd, cfg, cctx);
buf = malloc(sizeof(*buf) + max(cfg->sectorsize, cfg->nodesize));
if (!buf)
return -ENOMEM;
memset(&super, 0, sizeof(super));
num_bytes = (cfg->num_bytes / cfg->sectorsize) * cfg->sectorsize;
- if (cfg->fs_uuid && *cfg->fs_uuid) {
+ if (*cfg->fs_uuid) {
if (uuid_parse(cfg->fs_uuid, super.fsid) != 0) {
error("cannot not parse UUID: %s", cfg->fs_uuid);
ret = -EINVAL;
}
} 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);
btrfs_set_super_bytenr(&super, cfg->blocks[0]);
btrfs_set_super_num_devices(&super, 1);
- btrfs_set_super_magic(&super, BTRFS_MAGIC);
+ btrfs_set_super_magic(&super, BTRFS_MAGIC_PARTIAL);
btrfs_set_super_generation(&super, 1);
btrfs_set_super_root(&super, cfg->blocks[1]);
btrfs_set_super_chunk_root(&super, cfg->blocks[3]);
if (!skinny_metadata)
item_size += sizeof(struct btrfs_tree_block_info);
- BUG_ON(cfg->blocks[i] < first_free);
- BUG_ON(cfg->blocks[i] < cfg->blocks[i - 1]);
+ if (cfg->blocks[i] < first_free) {
+ error("block[%d] below first free: %llu < %llu",
+ i, (unsigned long long)cfg->blocks[i],
+ (unsigned long long)first_free);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (cfg->blocks[i] < cfg->blocks[i - 1]) {
+ error("blocks %d and %d in reverse order: %llu < %llu",
+ i, i - 1,
+ (unsigned long long)cfg->blocks[i],
+ (unsigned long long)cfg->blocks[i - 1]);
+ ret = -EINVAL;
+ goto out;
+ }
/* create extent item */
itemoff -= item_size;
}
/* and write out the super block */
- BUG_ON(sizeof(super) > cfg->sectorsize);
memset(buf->data, 0, BTRFS_SUPER_INFO_SIZE);
memcpy(buf->data, &super, sizeof(super));
buf->len = BTRFS_SUPER_INFO_SIZE;
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)
{
device_total_bytes = (device_total_bytes / sectorsize) * sectorsize;
- device = kzalloc(sizeof(*device), GFP_NOFS);
- if (!device)
- goto err_nomem;
- buf = kzalloc(sectorsize, GFP_NOFS);
- if (!buf)
- goto err_nomem;
- BUG_ON(sizeof(*disk_super) > sectorsize);
+ device = calloc(1, sizeof(*device));
+ if (!device) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ buf = calloc(1, sectorsize);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
disk_super = (struct btrfs_super_block *)buf;
dev_item = &disk_super->dev_item;
device->total_ios = 0;
device->dev_root = root->fs_info->dev_root;
device->name = strdup(path);
- if (!device->name)
- goto err_nomem;
+ if (!device->name) {
+ ret = -ENOMEM;
+ goto out;
+ }
INIT_LIST_HEAD(&device->dev_list);
ret = btrfs_add_device(trans, root, device);
- BUG_ON(ret);
+ if (ret)
+ goto out;
fs_total_bytes = btrfs_super_total_bytes(super) + device_total_bytes;
btrfs_set_super_total_bytes(super, fs_total_bytes);
ret = pwrite(fd, buf, sectorsize, BTRFS_SUPER_INFO_OFFSET);
BUG_ON(ret != sectorsize);
- kfree(buf);
+ free(buf);
list_add(&device->dev_list, &root->fs_info->fs_devices->devices);
device->fs_devices = root->fs_info->fs_devices;
return 0;
-err_nomem:
- kfree(device);
- kfree(buf);
- return -ENOMEM;
+out:
+ free(device);
+ free(buf);
+ return ret;
}
static int btrfs_wipe_existing_sb(int fd)
*/
if (discard_range(fd, 0, 0) == 0) {
if (opflags & PREP_DEVICE_VERBOSE)
- printf("Performing full device TRIM (%s) ...\n",
- pretty_size(block_count));
+ printf("Performing full device TRIM %s (%s) ...\n",
+ file, pretty_size(block_count));
discard_blocks(fd, 0, block_count);
}
}
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)
{
int mult = 0;
const char** suffix = NULL;
u64 last_size;
+ int negative;
if (str_size == 0)
return 0;
+ negative = !!(unit_mode & UNITS_NEGATIVE);
+ unit_mode &= ~UNITS_NEGATIVE;
+
if ((unit_mode & ~UNITS_MODE_MASK) == UNITS_RAW) {
- snprintf(str, str_size, "%llu", size);
+ if (negative)
+ snprintf(str, str_size, "%lld", size);
+ else
+ snprintf(str, str_size, "%llu", size);
return 0;
}
num_divs = 0;
break;
default:
- while (size >= mult) {
- last_size = size;
- size /= mult;
- num_divs++;
+ if (negative) {
+ s64 ssize = (s64)size;
+ s64 last_ssize = ssize;
+
+ while ((ssize < 0 ? -ssize : ssize) >= mult) {
+ last_ssize = ssize;
+ ssize /= mult;
+ num_divs++;
+ }
+ last_size = (u64)last_ssize;
+ } else {
+ while (size >= mult) {
+ last_size = size;
+ size /= mult;
+ num_divs++;
+ }
}
/*
* If the value is smaller than base, we didn't do any
assert(0);
return -1;
}
- fraction = (float)last_size / base;
+
+ if (negative) {
+ fraction = (float)(s64)last_size / base;
+ } else {
+ fraction = (float)last_size / base;
+ }
return snprintf(str, str_size, "%.2f%s", fraction, suffix[num_divs]);
}
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)
u64 dev_cnt, int mixed, int ssd)
{
u64 allowed = 0;
+ u64 profile = metadata_profile | data_profile;
switch (dev_cnt) {
default:
allowed |= BTRFS_BLOCK_GROUP_DUP;
}
- if (dev_cnt > 1 &&
- ((metadata_profile | data_profile) & BTRFS_BLOCK_GROUP_DUP)) {
+ if (dev_cnt > 1 && profile & BTRFS_BLOCK_GROUP_DUP) {
warning("DUP is not recommended on filesystem with multiple devices");
}
if (metadata_profile & ~allowed) {
return 1;
}
+ if (dev_cnt == 3 && profile & BTRFS_BLOCK_GROUP_RAID6) {
+ warning("RAID6 is not recommended on filesystem with 3 devices only");
+ }
+ if (dev_cnt == 2 && profile & BTRFS_BLOCK_GROUP_RAID5) {
+ warning("RAID5 is not recommended on filesystem with 2 devices only");
+ }
warning_on(!mixed && (data_profile & BTRFS_BLOCK_GROUP_DUP) && ssd,
"DUP may not actually lead to 2 copies on the device, see manual page");
return 0;
}
-int btrfs_scan_lblkid(void)
+int btrfs_scan_devices(void)
{
int fd = -1;
int ret;
}
/*
- * For a given:
- * - file or directory return the containing tree root id
- * - subvolume return its own tree id
- * - 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)
-{
- struct btrfs_ioctl_ino_lookup_args args;
- int ret;
-
- memset(&args, 0, sizeof(args));
- args.treeid = 0;
- args.objectid = BTRFS_FIRST_FREE_OBJECTID;
-
- ret = ioctl(fd, BTRFS_IOC_INO_LOOKUP, &args);
- if (ret < 0)
- return -errno;
-
- *rootid = args.treeid;
-
- return 0;
-}
-
-/*
* return 0 if a btrfs mount point is found
* return 1 if a mount point is found but not btrfs
* return <0 if something goes wrong
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);
*/
return (unsigned int)(jrand48(rand_seed) % upper);
}
+
+void btrfs_config_init(void)
+{
+}
projects / platform / upstream / btrfs-progs.git / blobdiff