/*
* Get file system statistics.
*/
int
ext2fs_statvfs(struct mount *mp, struct statvfs *sbp)
{
struct ufsmount *ump;
struct m_ext2fs *fs;
uint32_t overhead, overhead_per_group, ngdb;
int i, ngroups;
ump = VFSTOUFS(mp);
fs = ump->um_e2fs;
if (fs->e2fs.e2fs_magic != E2FS_MAGIC)
panic("ext2fs_statvfs");
/*
* Compute the overhead (FS structures)
*/
overhead_per_group =
1 /* block bitmap */ +
1 /* inode bitmap */ +
fs->e2fs_itpg;
overhead = fs->e2fs.e2fs_first_dblock +
fs->e2fs_ncg * overhead_per_group;
if (EXT2F_HAS_COMPAT_FEATURE(fs, EXT2F_COMPAT_SPARSESUPER2)) {
/*
* Superblock and group descriptions is in group zero,
* then optionally 0, 1 or 2 extra copies.
*/
ngroups = 1
+ (fs->e2fs.e4fs_backup_bgs[0] ? 1 : 0)
+ (fs->e2fs.e4fs_backup_bgs[1] ? 1 : 0);
} else if (EXT2F_HAS_ROCOMPAT_FEATURE(fs, EXT2F_ROCOMPAT_SPARSESUPER)) {
for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) {
if (cg_has_sb(i))
ngroups++;
}
} else {
ngroups = fs->e2fs_ncg;
}
ngdb = fs->e2fs_ngdb;
if (EXT2F_HAS_COMPAT_FEATURE(fs, EXT2F_COMPAT_RESIZE))
ngdb += fs->e2fs.e2fs_reserved_ngdb;
overhead += ngroups * (1 /* superblock */ + ngdb);
sbp->f_bsize = fs->e2fs_bsize;
sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize;
sbp->f_iosize = fs->e2fs_bsize;
sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead;
sbp->f_bfree = fs->e2fs.e2fs_fbcount;
sbp->f_bresvd = fs->e2fs.e2fs_rbcount;
if (sbp->f_bfree > sbp->f_bresvd)
sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd;
else
sbp->f_bavail = 0;
sbp->f_files = fs->e2fs.e2fs_icount;
sbp->f_ffree = fs->e2fs.e2fs_ficount;
sbp->f_favail = fs->e2fs.e2fs_ficount;
sbp->f_fresvd = 0;
copy_statvfs_info(sbp, mp);
return 0;
}
int
ext2fs_setsize(struct inode *ip, uint64_t size)
{
if ((ip->i_e2fs_mode & IFMT) == IFREG ||
ip->i_e2fs_mode == 0) {
ip->i_din.e2fs_din->e2di_size_high = size >> 32;
if (size >= 0x80000000U) {
struct m_ext2fs *fs = ip->i_e2fs;
if (fs->e2fs.e2fs_rev <= E2FS_REV0) {
/* Linux automagically upgrades to REV1 here! */
return EFBIG;
}
if (!EXT2F_HAS_ROCOMPAT_FEATURE(fs,
EXT2F_ROCOMPAT_LARGEFILE)) {
fs->e2fs.e2fs_features_rocompat |=
EXT2F_ROCOMPAT_LARGEFILE;
fs->e2fs_fmod = 1;
}
}
} else if (size >= 0x80000000U)
