/* ARGSUSED */ int ext2fs_getattr(void *v) { struct vop_getattr_args /* { struct vnode *a_vp; struct vattr *a_vap; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct vattr *vap = ap->a_vap; EXT2FS_ITIMES(ip, NULL, NULL, NULL); /* * Copy from inode table */ vap->va_fsid = ip->i_dev; vap->va_fileid = ip->i_number; vap->va_mode = ip->i_e2fs_mode & ALLPERMS; vap->va_nlink = ip->i_e2fs_nlink; vap->va_uid = ip->i_uid; vap->va_gid = ip->i_gid; vap->va_rdev = (dev_t)fs2h32(ip->i_din.e2fs_din->e2di_rdev); vap->va_size = vp->v_size; vap->va_atime.tv_sec = ip->i_e2fs_atime; vap->va_atime.tv_nsec = 0; vap->va_mtime.tv_sec = ip->i_e2fs_mtime; vap->va_mtime.tv_nsec = 0; vap->va_ctime.tv_sec = ip->i_e2fs_ctime; vap->va_ctime.tv_nsec = 0; #ifdef EXT2FS_SYSTEM_FLAGS vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? SF_APPEND : 0; vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; #else vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? UF_APPEND : 0; vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? UF_IMMUTABLE : 0; #endif vap->va_gen = ip->i_e2fs_gen; /* this doesn't belong here */ if (vp->v_type == VBLK) vap->va_blocksize = BLKDEV_IOSIZE; else if (vp->v_type == VCHR) vap->va_blocksize = MAXBSIZE; else vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; vap->va_bytes = dbtob(ext2fs_nblock(ip)); vap->va_type = vp->v_type; vap->va_filerev = ip->i_modrev; return (0); }
/* * Balloc defines the structure of file system storage * by allocating the physical blocks on a device given * the inode and the logical block number in a file. */ int ext2fs_balloc(struct inode *ip, daddr_t bn, int size, kauth_cred_t cred, struct buf **bpp, int flags) { struct m_ext2fs *fs; daddr_t nb; struct buf *bp, *nbp; struct vnode *vp = ITOV(ip); struct indir indirs[EXT2FS_NIADDR + 2]; daddr_t newb, lbn, pref; int32_t *bap; /* XXX ondisk32 */ int num, i, error; u_int deallocated; daddr_t *blkp, *allocblk, allociblk[EXT2FS_NIADDR + 1]; int32_t *allocib; /* XXX ondisk32 */ int unwindidx = -1; UVMHIST_FUNC("ext2fs_balloc"); UVMHIST_CALLED(ubchist); UVMHIST_LOG(ubchist, "bn 0x%x", bn,0,0,0); if (bpp != NULL) { *bpp = NULL; } if (bn < 0) return (EFBIG); fs = ip->i_e2fs; lbn = bn; /* * The first EXT2FS_NDADDR blocks are direct blocks */ if (bn < EXT2FS_NDADDR) { /* XXX ondisk32 */ nb = fs2h32(ip->i_e2fs_blocks[bn]); if (nb != 0) { /* * the block is already allocated, just read it. */ if (bpp != NULL) { error = bread(vp, bn, fs->e2fs_bsize, NOCRED, B_MODIFY, &bp); if (error) { return (error); } *bpp = bp; } return (0); } /* * allocate a new direct block. */ error = ext2fs_alloc(ip, bn, ext2fs_blkpref(ip, bn, bn, &ip->i_e2fs_blocks[0]), cred, &newb); if (error) return (error); ip->i_e2fs_last_lblk = lbn; ip->i_e2fs_last_blk = newb; /* XXX ondisk32 */ ip->i_e2fs_blocks[bn] = h2fs32((int32_t)newb); ip->i_flag |= IN_CHANGE | IN_UPDATE; if (bpp != NULL) { bp = getblk(vp, bn, fs->e2fs_bsize, 0, 0); bp->b_blkno = EXT2_FSBTODB(fs, newb); if (flags & B_CLRBUF) clrbuf(bp); *bpp = bp; } return (0); } /* * Determine the number of levels of indirection. */ pref = 0; if ((error = ufs_getlbns(vp, bn, indirs, &num)) != 0) return(error); #ifdef DIAGNOSTIC if (num < 1) panic ("ext2fs_balloc: ufs_getlbns returned indirect block\n"); #endif /* * Fetch the first indirect block allocating if necessary. */ --num; /* XXX ondisk32 */ nb = fs2h32(ip->i_e2fs_blocks[EXT2FS_NDADDR + indirs[0].in_off]); allocib = NULL; allocblk = allociblk; if (nb == 0) { pref = ext2fs_blkpref(ip, lbn, 0, (int32_t *)0); error = ext2fs_alloc(ip, lbn, pref, cred, &newb); if (error) return (error); nb = newb; *allocblk++ = nb; ip->i_e2fs_last_blk = newb; bp = getblk(vp, indirs[1].in_lbn, fs->e2fs_bsize, 0, 0); bp->b_blkno = EXT2_FSBTODB(fs, newb); clrbuf(bp); /* * Write synchronously so that indirect blocks * never point at garbage. */ if ((error = bwrite(bp)) != 0) goto fail; unwindidx = 0; allocib = &ip->i_e2fs_blocks[EXT2FS_NDADDR + indirs[0].in_off]; /* XXX ondisk32 */ *allocib = h2fs32((int32_t)newb); ip->i_flag |= IN_CHANGE | IN_UPDATE; } /* * Fetch through the indirect blocks, allocating as necessary. */ for (i = 1;;) { error = bread(vp, indirs[i].in_lbn, (int)fs->e2fs_bsize, NOCRED, 0, &bp); if (error) { goto fail; } bap = (int32_t *)bp->b_data; /* XXX ondisk32 */ nb = fs2h32(bap[indirs[i].in_off]); if (i == num) break; i++; if (nb != 0) { brelse(bp, 0); continue; } pref = ext2fs_blkpref(ip, lbn, 0, (int32_t *)0); error = ext2fs_alloc(ip, lbn, pref, cred, &newb); if (error) { brelse(bp, 0); goto fail; } nb = newb; *allocblk++ = nb; ip->i_e2fs_last_blk = newb; nbp = getblk(vp, indirs[i].in_lbn, fs->e2fs_bsize, 0, 0); nbp->b_blkno = EXT2_FSBTODB(fs, nb); clrbuf(nbp); /* * Write synchronously so that indirect blocks * never point at garbage. */ if ((error = bwrite(nbp)) != 0) { brelse(bp, 0); goto fail; } if (unwindidx < 0) unwindidx = i - 1; /* XXX ondisk32 */ bap[indirs[i - 1].in_off] = h2fs32((int32_t)nb); /* * If required, write synchronously, otherwise use * delayed write. */ if (flags & B_SYNC) { bwrite(bp); } else { bdwrite(bp); } } /* * Get the data block, allocating if necessary. */ if (nb == 0) { pref = ext2fs_blkpref(ip, lbn, indirs[num].in_off, &bap[0]); error = ext2fs_alloc(ip, lbn, pref, cred, &newb); if (error) { brelse(bp, 0); goto fail; } nb = newb; *allocblk++ = nb; ip->i_e2fs_last_lblk = lbn; ip->i_e2fs_last_blk = newb; /* XXX ondisk32 */ bap[indirs[num].in_off] = h2fs32((int32_t)nb); /* * If required, write synchronously, otherwise use * delayed write. */ if (flags & B_SYNC) { bwrite(bp); } else { bdwrite(bp); } if (bpp != NULL) { nbp = getblk(vp, lbn, fs->e2fs_bsize, 0, 0); nbp->b_blkno = EXT2_FSBTODB(fs, nb); if (flags & B_CLRBUF) clrbuf(nbp); *bpp = nbp; } return (0); } brelse(bp, 0); if (bpp != NULL) { if (flags & B_CLRBUF) { error = bread(vp, lbn, (int)fs->e2fs_bsize, NOCRED, B_MODIFY, &nbp); if (error) { goto fail; } } else { nbp = getblk(vp, lbn, fs->e2fs_bsize, 0, 0); nbp->b_blkno = EXT2_FSBTODB(fs, nb); } *bpp = nbp; } return (0); fail: /* * If we have failed part way through block allocation, we * have to deallocate any indirect blocks that we have allocated. */ for (deallocated = 0, blkp = allociblk; blkp < allocblk; blkp++) { ext2fs_blkfree(ip, *blkp); deallocated += fs->e2fs_bsize; } if (unwindidx >= 0) { if (unwindidx == 0) { *allocib = 0; } else { int r; r = bread(vp, indirs[unwindidx].in_lbn, (int)fs->e2fs_bsize, NOCRED, B_MODIFY, &bp); if (r) { panic("Could not unwind indirect block, error %d", r); } else { bap = (int32_t *)bp->b_data; /* XXX ondisk32 */ bap[indirs[unwindidx].in_off] = 0; if (flags & B_SYNC) bwrite(bp); else bdwrite(bp); } } for (i = unwindidx + 1; i <= num; i++) { bp = getblk(vp, indirs[i].in_lbn, (int)fs->e2fs_bsize, 0, 0); brelse(bp, BC_INVAL); } } if (deallocated) { ext2fs_setnblock(ip, ext2fs_nblock(ip) - btodb(deallocated)); ip->i_e2fs_flags |= IN_CHANGE | IN_UPDATE; } return error; }