do { if (!bg)
blkno = le64_to_cpu(rec->c_blkno); else
blkno = le64_to_cpu(bg->bg_next_group);
if (bh) {
brelse(bh);
bh = NULL;
}
if (o2info_coherent(&ffg->iff_req))
status = ocfs2_read_group_descriptor(gb_inode,
gb_dinode,
blkno, &bh); else
status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
if (status < 0) {
mlog(ML_ERROR, "Can't read the group descriptor # " "%llu from device.", (unsignedlonglong)blkno);
status = -EIO; goto bail;
}
bg = (struct ocfs2_group_desc *)bh->b_data;
if (!le16_to_cpu(bg->bg_free_bits_count)) continue;
for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) {
rec = &(cl->cl_recs[i]);
status = ocfs2_info_freefrag_scan_chain(osb, gb_inode,
gb_dinode,
rec, ffg,
chunks_in_group); if (status) goto bail;
}
if (ffg->iff_ffs.ffs_free_chunks_real)
ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg /
ffg->iff_ffs.ffs_free_chunks_real);
bail: if (unlock)
ocfs2_inode_unlock(gb_inode, 0);
if (gb_inode)
inode_unlock(gb_inode);
iput(gb_inode);
brelse(bh);
return status;
}
staticint ocfs2_info_handle_freefrag(struct inode *inode, struct ocfs2_info_request __user *req)
{
u64 blkno = -1; char namebuf[40]; int status, type = GLOBAL_BITMAP_SYSTEM_INODE;
status = -EINVAL; if (oir.ir_magic != OCFS2_INFO_MAGIC) goto bail;
switch (oir.ir_code) { case OCFS2_INFO_BLOCKSIZE: if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
status = ocfs2_info_handle_blocksize(inode, req); break; case OCFS2_INFO_CLUSTERSIZE: if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
status = ocfs2_info_handle_clustersize(inode, req); break; case OCFS2_INFO_MAXSLOTS: if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
status = ocfs2_info_handle_maxslots(inode, req); break; case OCFS2_INFO_LABEL: if (oir.ir_size == sizeof(struct ocfs2_info_label))
status = ocfs2_info_handle_label(inode, req); break; case OCFS2_INFO_UUID: if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
status = ocfs2_info_handle_uuid(inode, req); break; case OCFS2_INFO_FS_FEATURES: if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
status = ocfs2_info_handle_fs_features(inode, req); break; case OCFS2_INFO_JOURNAL_SIZE: if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
status = ocfs2_info_handle_journal_size(inode, req); break; case OCFS2_INFO_FREEINODE: if (oir.ir_size == sizeof(struct ocfs2_info_freeinode))
status = ocfs2_info_handle_freeinode(inode, req); break; case OCFS2_INFO_FREEFRAG: if (oir.ir_size == sizeof(struct ocfs2_info_freefrag))
status = ocfs2_info_handle_freefrag(inode, req); break; default:
status = ocfs2_info_handle_unknown(inode, req); break;
}
bail: return status;
}
staticint ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
u64 *req_addr, int compat_flag)
{ int status = -EFAULT;
u64 __user *bp = NULL;
if (compat_flag) { #ifdef CONFIG_COMPAT /* *pointerbpstoresthebaseaddressofapointersarray, *whichcollectsalladdressesofseparaterequest.
*/
bp = (u64 __user *)(unsignedlong)compat_ptr(info->oi_requests); #else
BUG(); #endif
} else
bp = (u64 __user *)(unsignedlong)(info->oi_requests);
if (o2info_from_user(*req_addr, bp + idx)) goto bail;
status = 0;
bail: return status;
}
/* *OCFS2_IOC_INFOhandlesanarrayofrequestspassedfromuserspace. * *ocfs2_info_handle()receivesalargeinfoaggregation,graband *validatetherequestcountfromheader,thenbreakitintosmall *pieces,laterspecifichandlerscanhandlethemonebyone. * *Ideahereistomakeeachseparaterequestsmallenoughtoensure *abetterbackward&forwardcompatibility,sinceasmallpieceof *requestwillbelesslikelytobebrokenifdisklayoutgetchanged.
*/ static noinline_for_stack int
ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, int compat_flag)
{ int i, status = 0;
u64 req_addr; struct ocfs2_info_request __user *reqp;
if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
(!info->oi_requests)) {
status = -EINVAL; goto bail;
}
for (i = 0; i < info->oi_count; i++) {
status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); if (status) break;
reqp = (struct ocfs2_info_request __user *)(unsignedlong)req_addr; if (!reqp) {
status = -EINVAL; goto bail;
}
status = ocfs2_info_handle_request(inode, reqp); if (status) break;
}
switch (cmd) { case OCFS2_IOC_RESVSP: case OCFS2_IOC_RESVSP64: case OCFS2_IOC_UNRESVSP: case OCFS2_IOC_UNRESVSP64:
{ struct ocfs2_space_resv sr;
if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) return -EFAULT;
return ocfs2_change_file_space(filp, cmd, &sr);
} case OCFS2_IOC_GROUP_EXTEND:
{ int new_clusters;
if (!capable(CAP_SYS_RESOURCE)) return -EPERM;
if (get_user(new_clusters, (int __user *)arg)) return -EFAULT;
status = mnt_want_write_file(filp); if (status) return status;
status = ocfs2_group_extend(inode, new_clusters);
mnt_drop_write_file(filp); return status;
} case OCFS2_IOC_GROUP_ADD: case OCFS2_IOC_GROUP_ADD64:
{ struct ocfs2_new_group_input input;
if (!capable(CAP_SYS_RESOURCE)) return -EPERM;
if (copy_from_user(&input, (int __user *) arg, sizeof(input))) return -EFAULT;
status = mnt_want_write_file(filp); if (status) return status;
status = ocfs2_group_add(inode, &input);
mnt_drop_write_file(filp); return status;
} case OCFS2_IOC_REFLINK:
{ struct reflink_arguments args; constchar __user *old_path; constchar __user *new_path; bool preserve;
switch (cmd) { case OCFS2_IOC_RESVSP: case OCFS2_IOC_RESVSP64: case OCFS2_IOC_UNRESVSP: case OCFS2_IOC_UNRESVSP64: case OCFS2_IOC_GROUP_EXTEND: case OCFS2_IOC_GROUP_ADD: case OCFS2_IOC_GROUP_ADD64: break; case OCFS2_IOC_REFLINK: if (copy_from_user(&args, argp, sizeof(args))) return -EFAULT;
preserve = (args.preserve != 0);
return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
compat_ptr(args.new_path), preserve); case OCFS2_IOC_INFO: if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) return -EFAULT;
return ocfs2_info_handle(inode, &info, 1); case FITRIM: case OCFS2_IOC_MOVE_EXT: break; default: return -ENOIOCTLCMD;
}
return ocfs2_ioctl(file, cmd, arg);
} #endif
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-09-28)
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