#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/sysinfo.h>
#include <uuid/uuid.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/magic.h>
#include <getopt.h>
+#include <btrfsutil.h>
+
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
memset(buf, 0, len);
ret = pwrite(fd, buf, len, offset);
if (ret < 0) {
- error("cannot wipe existing superblock: %s", strerror(errno));
+ error("cannot wipe existing superblock: %m");
ret = -1;
} else if (ret != len) {
error("cannot wipe existing superblock: wrote %d of %zd", ret, len);
ret = fstat(fd, &st);
if (ret < 0) {
- error("unable to stat %s: %s", file, strerror(errno));
+ error("unable to stat %s: %m", file);
return 1;
}
return ret;
}
-static int is_reg_file(const char *path)
+int is_reg_file(const char *path)
{
struct stat statbuf;
return S_ISREG(statbuf.st_mode);
}
+int is_path_exist(const char *path)
+{
+ struct stat statbuf;
+ int ret;
+
+ ret = stat(path, &statbuf);
+ if (ret < 0) {
+ if (errno == ENOENT)
+ return 0;
+ else
+ return -errno;
+ }
+ return 1;
+}
+
/*
* This function checks if the given input parameter is
* an uuid or a path
fd = open(dev, O_RDONLY);
if (fd < 0) {
ret = -errno;
- error("cannot open %s: %s", dev, strerror(errno));
+ error("cannot open %s: %m", dev);
goto out;
}
return -1;
}
ret = open_file_or_dir(mp, dirstream);
- error_on(verbose && ret < 0, "can't access '%s': %s",
- path, strerror(errno));
+ error_on(verbose && ret < 0, "can't access '%s': %m",
+ path);
} else {
ret = btrfs_open_dir(path, dirstream, 1);
}
/*
* Do the following checks before calling open_file_or_dir():
* 1: path is in a btrfs filesystem
- * 2: path is a directory
+ * 2: path is a directory if dir_only is 1
*/
-int btrfs_open_dir(const char *path, DIR **dirstream, int verbose)
+int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only)
{
struct statfs stfs;
struct stat st;
int ret;
if (statfs(path, &stfs) != 0) {
- error_on(verbose, "cannot access '%s': %s", path,
- strerror(errno));
+ error_on(verbose, "cannot access '%s': %m", path);
return -1;
}
}
if (stat(path, &st) != 0) {
- error_on(verbose, "cannot access '%s': %s", path,
- strerror(errno));
+ error_on(verbose, "cannot access '%s': %m", path);
return -1;
}
- if (!S_ISDIR(st.st_mode)) {
+ if (dir_only && !S_ISDIR(st.st_mode)) {
error_on(verbose, "not a directory: %s", path);
return -3;
}
ret = open_file_or_dir(path, dirstream);
if (ret < 0) {
- error_on(verbose, "cannot access '%s': %s", path,
- strerror(errno));
+ error_on(verbose, "cannot access '%s': %m", path);
}
return ret;
}
+int btrfs_open_dir(const char *path, DIR **dirstream, int verbose)
+{
+ return btrfs_open(path, dirstream, verbose, 1);
+}
+
+int btrfs_open_file_or_dir(const char *path, DIR **dirstream, int verbose)
+{
+ return btrfs_open(path, dirstream, verbose, 0);
+}
+
/* checks if a device is a loop device */
static int is_loop_device (const char* device) {
struct stat statbuf;
const char* file)
{
int ret;
- struct list_head *head;
- struct list_head *cur;
struct btrfs_device *device;
- head = &fs_devices->devices;
- list_for_each(cur, head) {
- device = list_entry(cur, struct btrfs_device, dev_list);
-
+ list_for_each_entry(device, &fs_devices->devices, dev_list) {
if((ret = is_same_loop_file(device->name, file)))
return ret;
}
fd = open(file, O_RDONLY);
if (fd < 0) {
- error("mount check: cannot open %s: %s", file,
- strerror(errno));
+ error("mount check: cannot open %s: %m", file);
return -errno;
}
fd = open("/dev/btrfs-control", O_RDWR);
if (fd < 0) {
warning(
- "failed to open /dev/btrfs-control, skipping device registration: %s",
- strerror(errno));
+ "failed to open /dev/btrfs-control, skipping device registration: %m");
return -errno;
}
memset(&args, 0, sizeof(args));
strncpy_null(args.name, fname);
ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
if (ret < 0) {
- error("device scan failed on '%s': %s", fname,
- strerror(errno));
+ error("device scan failed on '%s': %m", fname);
ret = -errno;
}
close(fd);
return -1;
trans = btrfs_start_transaction(root, 1);
+ BUG_ON(IS_ERR(trans));
__strncpy_null(root->fs_info->super_copy->label, label, BTRFS_LABEL_SIZE - 1);
btrfs_commit_transaction(trans, root);
fd = open(mount_path, O_RDONLY | O_NOATIME);
if (fd < 0) {
- error("unable to access %s: %s", mount_path, strerror(errno));
+ error("unable to access %s: %m", mount_path);
return -1;
}
memset(label, 0, sizeof(label));
__strncpy_null(label, labelp, BTRFS_LABEL_SIZE - 1);
if (ioctl(fd, BTRFS_IOC_SET_FSLABEL, label) < 0) {
- error("unable to set label of %s: %s", mount_path,
- strerror(errno));
+ error("unable to set label of %s: %m", mount_path);
close(fd);
return -1;
}
fd = open(mount_path, O_RDONLY | O_NOATIME);
if (fd < 0) {
- error("unable to access %s: %s", mount_path, strerror(errno));
+ error("unable to access %s: %m", mount_path);
return -1;
}
ret = ioctl(fd, BTRFS_IOC_GET_FSLABEL, label);
if (ret < 0) {
if (errno != ENOTTY)
- error("unable to get label of %s: %s", mount_path,
- strerror(errno));
+ error("unable to get label of %s: %m", mount_path);
ret = -errno;
close(fd);
return ret;
char *s = strchr(p, '/');
const char *ptr_src_end = p + strlen(p);
char *ptr_parse_end = NULL;
+ enum btrfs_util_error err;
u64 level;
u64 id;
int fd;
path:
/* Path format like subv at 'my_subvol' is the fallback case */
- ret = test_issubvolume(p);
- if (ret < 0 || !ret)
+ err = btrfs_util_is_subvolume(p);
+ if (err)
goto err;
fd = open(p, O_RDONLY);
if (fd < 0)
void close_file_or_dir(int fd, DIR *dirstream)
{
- if (dirstream)
+ int old_errno;
+
+ old_errno = errno;
+ if (dirstream) {
closedir(dirstream);
- else if (fd >= 0)
+ } else if (fd >= 0) {
close(fd);
+ }
+
+ errno = old_errno;
}
int get_device_info(int fd, u64 devid,
fd = open(path, O_RDONLY);
if (fd < 0) {
ret = -errno;
- error("cannot open %s: %s", path, strerror(errno));
+ error("cannot open %s: %m", path);
goto out;
}
ret = check_mounted_where(fd, path, mp, sizeof(mp),
return ret;
}
+int get_fsid(const char *path, u8 *fsid, int silent)
+{
+ int ret;
+ int fd;
+ struct btrfs_ioctl_fs_info_args args;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ ret = -errno;
+ if (!silent)
+ error("failed to open %s: %s", path,
+ strerror(-ret));
+ goto out;
+ }
+
+ ret = ioctl(fd, BTRFS_IOC_FS_INFO, &args);
+ if (ret < 0) {
+ ret = -errno;
+ goto out;
+ }
+
+ memcpy(fsid, args.fsid, BTRFS_FSID_SIZE);
+ ret = 0;
+
+out:
+ if (fd != -1)
+ close(fd);
+ return ret;
+}
+
+int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[])
+{
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+
+ while (seen) {
+ if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
+ return 1;
+
+ seen = seen->next;
+ }
+
+ return 0;
+}
+
+int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
+ int fd, DIR *dirstream)
+{
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+ struct seen_fsid *alloc;
+
+ if (!seen)
+ goto insert;
+
+ while (1) {
+ if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
+ return -EEXIST;
+
+ if (!seen->next)
+ break;
+
+ seen = seen->next;
+ }
+
+insert:
+ alloc = malloc(sizeof(*alloc));
+ if (!alloc)
+ return -ENOMEM;
+
+ alloc->next = NULL;
+ memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
+ alloc->fd = fd;
+ alloc->dirstream = dirstream;
+
+ if (seen)
+ seen->next = alloc;
+ else
+ seen_fsid_hash[slot] = alloc;
+
+ return 0;
+}
+
+void free_seen_fsid(struct seen_fsid *seen_fsid_hash[])
+{
+ int slot;
+ struct seen_fsid *seen;
+ struct seen_fsid *next;
+
+ for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
+ seen = seen_fsid_hash[slot];
+ while (seen) {
+ next = seen->next;
+ close_file_or_dir(seen->fd, seen->dirstream);
+ free(seen);
+ seen = next;
+ }
+ seen_fsid_hash[slot] = NULL;
+ }
+}
+
static int group_profile_devs_min(u64 flag)
{
switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
fd = open(path, O_RDONLY);
if (fd < 0) {
- error("cannot open %s: %s", path, strerror(errno));
+ error("cannot open %s: %m", path);
continue;
}
ret = btrfs_scan_one_device(fd, path, &tmp_devices,
strcmp(name, ".") && strcmp(name, "..");
}
-/*
- * Test if path is a subvolume
- * Returns:
- * 0 - path exists but it is not a subvolume
- * 1 - path exists and it is a subvolume
- * < 0 - error
- */
-int test_issubvolume(const char *path)
-{
- struct stat st;
- struct statfs stfs;
- int res;
-
- res = stat(path, &st);
- if (res < 0)
- return -errno;
-
- if (st.st_ino != BTRFS_FIRST_FREE_OBJECTID || !S_ISDIR(st.st_mode))
- return 0;
-
- res = statfs(path, &stfs);
- if (res < 0)
- return -errno;
-
- return (int)stfs.f_type == BTRFS_SUPER_MAGIC;
-}
-
const char *subvol_strip_mountpoint(const char *mnt, const char *full_path)
{
int len = strlen(mnt);
if (!len)
return full_path;
+ if ((strncmp(mnt, full_path, len) != 0) || (full_path[len] != '/')) {
+ error("not on mount point: %s", mnt);
+ exit(1);
+ }
+
if (mnt[len - 1] != '/')
len += 1;
return full_path + len;
}
-/*
- * Returns
- * <0: Std error
- * 0: All fine
- * 1: Error; and error info printed to the terminal. Fixme.
- * 2: If the fullpath is root tree instead of subvol tree
- */
-int get_subvol_info(const char *fullpath, struct root_info *get_ri)
-{
- u64 sv_id;
- int ret = 1;
- int fd = -1;
- int mntfd = -1;
- char *mnt = NULL;
- const char *svpath = NULL;
- DIR *dirstream1 = NULL;
- DIR *dirstream2 = NULL;
-
- ret = test_issubvolume(fullpath);
- if (ret < 0)
- return ret;
- if (!ret) {
- error("not a subvolume: %s", fullpath);
- return 1;
- }
-
- ret = find_mount_root(fullpath, &mnt);
- if (ret < 0)
- return ret;
- if (ret > 0) {
- error("%s doesn't belong to btrfs mount point", fullpath);
- return 1;
- }
- ret = 1;
- svpath = subvol_strip_mountpoint(mnt, fullpath);
-
- fd = btrfs_open_dir(fullpath, &dirstream1, 1);
- if (fd < 0)
- goto out;
-
- ret = btrfs_list_get_path_rootid(fd, &sv_id);
- if (ret)
- goto out;
-
- mntfd = btrfs_open_dir(mnt, &dirstream2, 1);
- if (mntfd < 0)
- goto out;
-
- memset(get_ri, 0, sizeof(*get_ri));
- get_ri->root_id = sv_id;
-
- 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);
-
-out:
- close_file_or_dir(mntfd, dirstream2);
- close_file_or_dir(fd, dirstream1);
- free(mnt);
-
- return ret;
-}
-
/* Set the seed manually */
void init_rand_seed(u64 seed)
{
void btrfs_config_init(void)
{
}
+
+/* Returns total size of main memory in bytes, -1UL if error. */
+unsigned long total_memory(void)
+{
+ struct sysinfo si;
+
+ if (sysinfo(&si) < 0) {
+ error("can't determine memory size");
+ return -1UL;
+ }
+ return si.totalram * si.mem_unit; /* bytes */
+}
+
+void print_device_info(struct btrfs_device *device, char *prefix)
+{
+ if (prefix)
+ printf("%s", prefix);
+ printf("Device: id = %llu, name = %s\n",
+ device->devid, device->name);
+}
+
+void print_all_devices(struct list_head *devices)
+{
+ struct btrfs_device *dev;
+
+ printf("All Devices:\n");
+ list_for_each_entry(dev, devices, dev_list)
+ print_device_info(dev, "\t");
+ printf("\n");
+}
projects / platform / upstream / btrfs-progs.git / blobdiff