projects / thirdparty / systemd.git / blame
| Commit | Line | Data |
|---|---|---|
| 28937bcc LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
| 2 | ||
| 3 | #include <linux/btrfs.h> | |
| 4 | #include <linux/magic.h> | |
| 5 | #include <sys/ioctl.h> | |
| 6 | #include <sys/vfs.h> | |
| 7 | ||
| 8 | #include "blockdev-util.h" | |
| 9 | #include "fs-util.h" | |
| 10 | #include "missing_fs.h" | |
| 11 | #include "missing_magic.h" | |
| 12 | #include "missing_xfs.h" | |
| 13 | #include "resize-fs.h" | |
| 14 | #include "stat-util.h" | |
| 15 | ||
| d6f1e660 | 16 | int resize_fs(int fd, uint64_t sz, uint64_t *ret_size) { |
| 28937bcc | 17 | struct statfs sfs; |
| 28937bcc LP |
18 | |
| 19 | assert(fd >= 0); | |
| 20 | ||
| 21 | /* Rounds down to next block size */ | |
| 22 | ||
| 23 | if (sz <= 0 || sz == UINT64_MAX) | |
| 24 | return -ERANGE; | |
| 25 | ||
| 26 | if (fstatfs(fd, &sfs) < 0) | |
| 27 | return -errno; | |
| 28 | ||
| 29 | if (is_fs_type(&sfs, EXT4_SUPER_MAGIC)) { | |
| 30 | uint64_t u; | |
| 31 | ||
| 32 | if (sz < EXT4_MINIMAL_SIZE) | |
| 33 | return -ERANGE; | |
| 34 | ||
| 35 | u = sz / sfs.f_bsize; | |
| 36 | ||
| 37 | if (ioctl(fd, EXT4_IOC_RESIZE_FS, &u) < 0) | |
| 38 | return -errno; | |
| 39 | ||
| d6f1e660 ZJS |
40 | if (ret_size) |
| 41 | *ret_size = u * sfs.f_bsize; | |
| 42 | ||
| 28937bcc LP |
43 | } else if (is_fs_type(&sfs, BTRFS_SUPER_MAGIC)) { |
| 44 | struct btrfs_ioctl_vol_args args = {}; | |
| 45 | ||
| 46 | /* 256M is the minimize size enforced by the btrfs kernel code when resizing (which is | |
| 47 | * strange btw, as mkfs.btrfs is fine creating file systems > 109M). It will return EINVAL in | |
| 48 | * that case, let's catch this error beforehand though, and report a more explanatory | |
| 49 | * error. */ | |
| 50 | ||
| 51 | if (sz < BTRFS_MINIMAL_SIZE) | |
| 52 | return -ERANGE; | |
| 53 | ||
| d6f1e660 ZJS |
54 | sz -= sz % sfs.f_bsize; |
| 55 | ||
| 683d0bc0 | 56 | xsprintf(args.name, "%" PRIu64, sz); |
| 28937bcc LP |
57 | |
| 58 | if (ioctl(fd, BTRFS_IOC_RESIZE, &args) < 0) | |
| 59 | return -errno; | |
| 60 | ||
| d6f1e660 ZJS |
61 | if (ret_size) |
| 62 | *ret_size = sz; | |
| 63 | ||
| 28937bcc LP |
64 | } else if (is_fs_type(&sfs, XFS_SB_MAGIC)) { |
| 65 | xfs_fsop_geom_t geo; | |
| 66 | xfs_growfs_data_t d; | |
| 67 | ||
| 68 | if (sz < XFS_MINIMAL_SIZE) | |
| 69 | return -ERANGE; | |
| 70 | ||
| 71 | if (ioctl(fd, XFS_IOC_FSGEOMETRY, &geo) < 0) | |
| 72 | return -errno; | |
| 73 | ||
| 74 | d = (xfs_growfs_data_t) { | |
| 75 | .imaxpct = geo.imaxpct, | |
| 76 | .newblocks = sz / geo.blocksize, | |
| 77 | }; | |
| 78 | ||
| 79 | if (ioctl(fd, XFS_IOC_FSGROWFSDATA, &d) < 0) | |
| 80 | return -errno; | |
| 81 | ||
| d6f1e660 ZJS |
82 | if (ret_size) |
| 83 | *ret_size = d.newblocks * geo.blocksize; | |
| 84 | ||
| 28937bcc LP |
85 | } else |
| 86 | return -EOPNOTSUPP; | |
| 87 | ||
| 88 | return 0; | |
| 89 | } | |
| 90 | ||
| 91 | uint64_t minimal_size_by_fs_magic(statfs_f_type_t magic) { | |
| 92 | ||
| 93 | switch (magic) { | |
| 94 | ||
| 95 | case (statfs_f_type_t) EXT4_SUPER_MAGIC: | |
| 96 | return EXT4_MINIMAL_SIZE; | |
| 97 | ||
| 98 | case (statfs_f_type_t) XFS_SB_MAGIC: | |
| 99 | return XFS_MINIMAL_SIZE; | |
| 100 | ||
| 101 | case (statfs_f_type_t) BTRFS_SUPER_MAGIC: | |
| 102 | return BTRFS_MINIMAL_SIZE; | |
| 103 | ||
| 104 | default: | |
| 105 | return UINT64_MAX; | |
| 106 | } | |
| 107 | } | |
| 108 | ||
| 109 | uint64_t minimal_size_by_fs_name(const char *name) { | |
| 110 | ||
| 111 | if (streq_ptr(name, "ext4")) | |
| 112 | return EXT4_MINIMAL_SIZE; | |
| 113 | ||
| 114 | if (streq_ptr(name, "xfs")) | |
| 115 | return XFS_MINIMAL_SIZE; | |
| 116 | ||
| 117 | if (streq_ptr(name, "btrfs")) | |
| 118 | return BTRFS_MINIMAL_SIZE; | |
| 119 | ||
| 120 | return UINT64_MAX; | |
| 121 | } |