+++ /dev/null
-/*
- * 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 <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <asm/semaphore.h>
-
-#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, 1);
- 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;
-}
-
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff