X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=utils.c;h=715bab0ebfb56e91b92338385bd5838add274235;hb=6af3cc08ddb5c0165d357ffa36422c2716ebd2a0;hp=524f463d31406b1005a250ef7d31264d556fcdb0;hpb=a5ce5d2198226db6e4ed8f99c6f34ef74e8567bf;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/utils.c b/utils.c index 524f463..715bab0 100644 --- a/utils.c +++ b/utils.c @@ -40,6 +40,8 @@ #include #include +#include + #include "kerncompat.h" #include "radix-tree.h" #include "ctree.h" @@ -298,7 +300,7 @@ static int btrfs_wipe_existing_sb(int fd) 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); @@ -320,7 +322,7 @@ int btrfs_prepare_device(int fd, const char *file, u64 *block_count_ret, 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; } @@ -447,7 +449,7 @@ int is_mount_point(const char *path) return ret; } -static int is_reg_file(const char *path) +int is_reg_file(const char *path) { struct stat statbuf; @@ -456,6 +458,21 @@ static int is_reg_file(const char *path) 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 @@ -519,7 +536,7 @@ int get_btrfs_mount(const char *dev, char *mp, size_t mp_size) 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; } @@ -557,8 +574,8 @@ int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose) 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); } @@ -578,8 +595,7 @@ int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only) 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; } @@ -589,8 +605,7 @@ int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only) } 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; } @@ -601,8 +616,7 @@ int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only) 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; @@ -804,14 +818,9 @@ static int blk_file_in_dev_list(struct btrfs_fs_devices* fs_devices, 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; } @@ -888,8 +897,7 @@ int check_mounted(const char* file) 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; } @@ -978,16 +986,14 @@ int btrfs_register_one_device(const char *fname) 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); @@ -1257,15 +1263,14 @@ static int set_label_mounted(const char *mount_path, const char *labelp) 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; } @@ -1313,7 +1318,7 @@ int get_label_mounted(const char *mount_path, char *labelp) 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; } @@ -1321,8 +1326,7 @@ int get_label_mounted(const char *mount_path, char *labelp) 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; @@ -1451,6 +1455,7 @@ u64 parse_qgroupid(const char *p) 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; @@ -1478,8 +1483,8 @@ u64 parse_qgroupid(const char *p) 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) @@ -1539,10 +1544,16 @@ int open_file_or_dir(const char *fname, DIR **dirstream) 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, @@ -1660,7 +1671,7 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args, 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), @@ -1980,7 +1991,7 @@ int btrfs_scan_devices(void) 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, @@ -2443,163 +2454,23 @@ int test_issubvolname(const char *name) 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; -} - -int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri, u64 r_id) -{ - int fd; - int ret; - DIR *dirstream = NULL; - - fd = btrfs_open_dir(mnt, &dirstream, 1); - if (fd < 0) - return -EINVAL; - - memset(get_ri, 0, sizeof(*get_ri)); - get_ri->root_id = r_id; - - if (r_id == BTRFS_FS_TREE_OBJECTID) - ret = btrfs_get_toplevel_subvol(fd, get_ri); - else - ret = btrfs_get_subvol(fd, get_ri); - - if (ret) - error("can't find rootid '%llu' on '%s': %d", r_id, mnt, ret); - - close_file_or_dir(fd, dirstream); - - return ret; -} - -int get_subvol_info_by_uuid(const char *mnt, struct root_info *get_ri, u8 *uuid_arg) -{ - int fd; - int ret; - DIR *dirstream = NULL; - - fd = btrfs_open_dir(mnt, &dirstream, 1); - if (fd < 0) - return -EINVAL; - - memset(get_ri, 0, sizeof(*get_ri)); - uuid_copy(get_ri->uuid, uuid_arg); - - ret = btrfs_get_subvol(fd, get_ri); - if (ret) { - char uuid_parsed[BTRFS_UUID_UNPARSED_SIZE]; - uuid_unparse(uuid_arg, uuid_parsed); - error("can't find uuid '%s' on '%s': %d", - uuid_parsed, mnt, ret); - } - - close_file_or_dir(fd, dirstream); - - return ret; -} - /* Set the seed manually */ void init_rand_seed(u64 seed) { @@ -2701,3 +2572,21 @@ unsigned long total_memory(void) } 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"); +}