/* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License v.2. */ #include #include #include #include #include #include #include "gfs2.h" #include "bmap.h" #include "dir.h" #include "glock.h" #include "inode.h" #include "jdata.h" #include "meta_io.h" #include "quota.h" #include "resize.h" #include "rgrp.h" #include "super.h" #include "trans.h" /* A single transaction needs to add the structs to rindex and make the statfs change. */ int gfs2_resize_add_rgrps(struct gfs2_sbd *sdp, char __user *buf, unsigned int size) { unsigned int num = size / sizeof(struct gfs2_rindex); struct gfs2_inode *ip = sdp->sd_rindex; struct gfs2_alloc *al = NULL; struct gfs2_holder i_gh; unsigned int data_blocks, ind_blocks; int alloc_required; unsigned int x; int error; gfs2_write_calc_reserv(ip, size, &data_blocks, &ind_blocks); error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_PRIORITY | GL_SYNC, &i_gh); if (error) return error; if (!gfs2_is_jdata(ip)) { gfs2_consist_inode(ip); error = -EIO; goto out; } error = gfs2_write_alloc_required(ip, ip->i_di.di_size, size, &alloc_required); if (error) goto out; if (alloc_required) { al = gfs2_alloc_get(ip); al->al_requested = data_blocks + ind_blocks; error = gfs2_inplace_reserve(ip); if (error) goto out_alloc; error = gfs2_trans_begin(sdp, al->al_rgd->rd_ri.ri_length + data_blocks + ind_blocks + RES_DINODE + RES_STATFS, 0); if (error) goto out_relse; } else { error = gfs2_trans_begin(sdp, data_blocks + RES_DINODE + RES_STATFS, 0); if (error) goto out; } for (x = 0; x < num; x++) { struct gfs2_rindex ri; char ri_buf[sizeof(struct gfs2_rindex)]; error = copy_from_user(&ri, buf, sizeof(struct gfs2_rindex)); if (error) { error = -EFAULT; goto out_trans; } gfs2_rindex_out(&ri, ri_buf); error = gfs2_jdata_write_mem(ip, ri_buf, ip->i_di.di_size, sizeof(struct gfs2_rindex)); if (error < 0) goto out_trans; gfs2_assert_withdraw(sdp, error == sizeof(struct gfs2_rindex)); error = 0; gfs2_statfs_change(sdp, ri.ri_data, ri.ri_data, 0); buf += sizeof(struct gfs2_rindex); } out_trans: gfs2_trans_end(sdp); out_relse: if (alloc_required) gfs2_inplace_release(ip); out_alloc: if (alloc_required) gfs2_alloc_put(ip); out: ip->i_gl->gl_vn++; gfs2_glock_dq_uninit(&i_gh); return error; } static void drop_dentries(struct gfs2_inode *ip) { struct inode *inode; struct dentry *d; inode = gfs2_ip2v_lookup(ip); if (!inode) return; restart: spin_lock(&dcache_lock); list_for_each_entry(d, &inode->i_dentry, d_alias) { if (d_unhashed(d)) continue; dget_locked(d); __d_drop(d); spin_unlock(&dcache_lock); dput(d); goto restart; } spin_unlock(&dcache_lock); iput(inode); } /* This is called by an ioctl to rename an ordinary file that's represented in the vfs to a hidden system file that isn't represented in the vfs. It's used to add journals, along with the associated system files, to a fs. */ int gfs2_rename2system(struct gfs2_inode *ip, struct gfs2_inode *old_dip, char *old_name, struct gfs2_inode *new_dip, char *new_name) { struct gfs2_sbd *sdp = ip->i_sbd; struct gfs2_holder ghs[3]; struct qstr old_qstr, new_qstr; struct gfs2_inum inum; int alloc_required; struct buffer_head *dibh; int error; gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, ghs); gfs2_holder_init(old_dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); gfs2_holder_init(new_dip->i_gl, LM_ST_EXCLUSIVE, GL_SYNC, ghs + 2); error = gfs2_glock_nq_m(3, ghs); if (error) goto out; error = -EMLINK; if (ip->i_di.di_nlink != 1) goto out_gunlock; error = -EINVAL; if (!S_ISREG(ip->i_di.di_mode)) goto out_gunlock; old_qstr.name = old_name; old_qstr.len = strlen(old_name); error = gfs2_dir_search(old_dip, &old_qstr, &inum, NULL); switch (error) { case 0: break; default: goto out_gunlock; } error = -EINVAL; if (!gfs2_inum_equal(&inum, &ip->i_num)) goto out_gunlock; new_qstr.name = new_name; new_qstr.len = strlen(new_name); error = gfs2_dir_search(new_dip, &new_qstr, NULL, NULL); switch (error) { case -ENOENT: break; case 0: error = -EEXIST; default: goto out_gunlock; } gfs2_alloc_get(ip); error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); if (error) goto out_alloc; error = gfs2_diradd_alloc_required(new_dip, &new_qstr, &alloc_required); if (error) goto out_unhold; if (alloc_required) { struct gfs2_alloc *al = gfs2_alloc_get(new_dip); al->al_requested = sdp->sd_max_dirres; error = gfs2_inplace_reserve(new_dip); if (error) goto out_alloc2; error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + al->al_rgd->rd_ri.ri_length + 3 * RES_DINODE + RES_LEAF + RES_STATFS + RES_QUOTA, 0); if (error) goto out_ipreserv; } else { error = gfs2_trans_begin(sdp, 3 * RES_DINODE + 2 * RES_LEAF + RES_QUOTA, 0); if (error) goto out_unhold; } error = gfs2_dir_del(old_dip, &old_qstr); if (error) goto out_trans; error = gfs2_dir_add(new_dip, &new_qstr, &ip->i_num, IF2DT(ip->i_di.di_mode)); if (error) goto out_trans; gfs2_quota_change(ip, -ip->i_di.di_blocks, ip->i_di.di_uid, ip->i_di.di_gid); error = gfs2_meta_inode_buffer(ip, &dibh); if (error) goto out_trans; ip->i_di.di_flags |= GFS2_DIF_SYSTEM; gfs2_trans_add_bh(ip->i_gl, dibh); gfs2_dinode_out(&ip->i_di, dibh->b_data); brelse(dibh); drop_dentries(ip); out_trans: gfs2_trans_end(sdp); out_ipreserv: if (alloc_required) gfs2_inplace_release(new_dip); out_alloc2: if (alloc_required) gfs2_alloc_put(new_dip); out_unhold: gfs2_quota_unhold(ip); out_alloc: gfs2_alloc_put(ip); out_gunlock: gfs2_glock_dq_m(3, ghs); out: gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); gfs2_holder_uninit(ghs + 2); return error; }