d4e9c4c3bf
This adds an extra argument to gfs2_trans_add_bh() to indicate whether the bh being added to the transaction is metadata or data. Its currently unused since all existing callers set it to 1 (metadata) but following patches will make use of it. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
292 lines
6.2 KiB
C
292 lines
6.2 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <asm/semaphore.h>
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#include "gfs2.h"
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#include "bmap.h"
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#include "dir.h"
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#include "glock.h"
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#include "inode.h"
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#include "jdata.h"
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#include "meta_io.h"
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#include "quota.h"
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#include "resize.h"
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#include "rgrp.h"
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#include "super.h"
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#include "trans.h"
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/* A single transaction needs to add the structs to rindex and make the
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statfs change. */
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int gfs2_resize_add_rgrps(struct gfs2_sbd *sdp, char __user *buf,
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unsigned int size)
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{
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unsigned int num = size / sizeof(struct gfs2_rindex);
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struct gfs2_inode *ip = sdp->sd_rindex;
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struct gfs2_alloc *al = NULL;
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struct gfs2_holder i_gh;
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unsigned int data_blocks, ind_blocks;
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int alloc_required;
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unsigned int x;
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int error;
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gfs2_write_calc_reserv(ip, size, &data_blocks, &ind_blocks);
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error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
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LM_FLAG_PRIORITY | GL_SYNC, &i_gh);
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if (error)
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return error;
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if (!gfs2_is_jdata(ip)) {
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gfs2_consist_inode(ip);
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error = -EIO;
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goto out;
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}
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error = gfs2_write_alloc_required(ip, ip->i_di.di_size, size,
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&alloc_required);
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if (error)
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goto out;
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if (alloc_required) {
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al = gfs2_alloc_get(ip);
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al->al_requested = data_blocks + ind_blocks;
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error = gfs2_inplace_reserve(ip);
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if (error)
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goto out_alloc;
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error = gfs2_trans_begin(sdp,
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al->al_rgd->rd_ri.ri_length +
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data_blocks + ind_blocks +
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RES_DINODE + RES_STATFS, 0);
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if (error)
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goto out_relse;
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} else {
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error = gfs2_trans_begin(sdp, data_blocks +
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RES_DINODE + RES_STATFS, 0);
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if (error)
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goto out;
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}
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for (x = 0; x < num; x++) {
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struct gfs2_rindex ri;
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char ri_buf[sizeof(struct gfs2_rindex)];
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error = copy_from_user(&ri, buf, sizeof(struct gfs2_rindex));
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if (error) {
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error = -EFAULT;
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goto out_trans;
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}
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gfs2_rindex_out(&ri, ri_buf);
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error = gfs2_jdata_write_mem(ip, ri_buf, ip->i_di.di_size,
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sizeof(struct gfs2_rindex));
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if (error < 0)
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goto out_trans;
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gfs2_assert_withdraw(sdp, error == sizeof(struct gfs2_rindex));
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error = 0;
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gfs2_statfs_change(sdp, ri.ri_data, ri.ri_data, 0);
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buf += sizeof(struct gfs2_rindex);
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}
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out_trans:
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gfs2_trans_end(sdp);
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out_relse:
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if (alloc_required)
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gfs2_inplace_release(ip);
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out_alloc:
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if (alloc_required)
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gfs2_alloc_put(ip);
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out:
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ip->i_gl->gl_vn++;
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gfs2_glock_dq_uninit(&i_gh);
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return error;
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}
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static void drop_dentries(struct gfs2_inode *ip)
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{
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struct inode *inode;
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struct dentry *d;
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inode = gfs2_ip2v_lookup(ip);
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if (!inode)
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return;
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restart:
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spin_lock(&dcache_lock);
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list_for_each_entry(d, &inode->i_dentry, d_alias) {
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if (d_unhashed(d))
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continue;
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dget_locked(d);
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__d_drop(d);
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spin_unlock(&dcache_lock);
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dput(d);
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goto restart;
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}
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spin_unlock(&dcache_lock);
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iput(inode);
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}
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/* This is called by an ioctl to rename an ordinary file that's represented
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in the vfs to a hidden system file that isn't represented in the vfs. It's
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used to add journals, along with the associated system files, to a fs. */
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int gfs2_rename2system(struct gfs2_inode *ip,
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struct gfs2_inode *old_dip, char *old_name,
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struct gfs2_inode *new_dip, char *new_name)
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{
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struct gfs2_sbd *sdp = ip->i_sbd;
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struct gfs2_holder ghs[3];
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struct qstr old_qstr, new_qstr;
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struct gfs2_inum inum;
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int alloc_required;
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struct buffer_head *dibh;
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int error;
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gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, ghs);
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gfs2_holder_init(old_dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
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gfs2_holder_init(new_dip->i_gl, LM_ST_EXCLUSIVE, GL_SYNC, ghs + 2);
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error = gfs2_glock_nq_m(3, ghs);
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if (error)
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goto out;
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error = -EMLINK;
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if (ip->i_di.di_nlink != 1)
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goto out_gunlock;
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error = -EINVAL;
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if (!S_ISREG(ip->i_di.di_mode))
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goto out_gunlock;
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old_qstr.name = old_name;
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old_qstr.len = strlen(old_name);
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error = gfs2_dir_search(old_dip, &old_qstr, &inum, NULL);
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switch (error) {
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case 0:
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break;
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default:
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goto out_gunlock;
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}
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error = -EINVAL;
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if (!gfs2_inum_equal(&inum, &ip->i_num))
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goto out_gunlock;
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new_qstr.name = new_name;
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new_qstr.len = strlen(new_name);
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error = gfs2_dir_search(new_dip, &new_qstr, NULL, NULL);
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switch (error) {
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case -ENOENT:
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break;
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case 0:
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error = -EEXIST;
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default:
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goto out_gunlock;
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}
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gfs2_alloc_get(ip);
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error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
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if (error)
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goto out_alloc;
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error = gfs2_diradd_alloc_required(new_dip, &new_qstr, &alloc_required);
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if (error)
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goto out_unhold;
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if (alloc_required) {
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struct gfs2_alloc *al = gfs2_alloc_get(new_dip);
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al->al_requested = sdp->sd_max_dirres;
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error = gfs2_inplace_reserve(new_dip);
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if (error)
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goto out_alloc2;
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error = gfs2_trans_begin(sdp,
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sdp->sd_max_dirres +
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al->al_rgd->rd_ri.ri_length +
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3 * RES_DINODE + RES_LEAF +
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RES_STATFS + RES_QUOTA, 0);
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if (error)
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goto out_ipreserv;
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} else {
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error = gfs2_trans_begin(sdp,
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3 * RES_DINODE + 2 * RES_LEAF +
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RES_QUOTA, 0);
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if (error)
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goto out_unhold;
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}
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error = gfs2_dir_del(old_dip, &old_qstr);
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if (error)
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goto out_trans;
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error = gfs2_dir_add(new_dip, &new_qstr, &ip->i_num,
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IF2DT(ip->i_di.di_mode));
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if (error)
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goto out_trans;
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gfs2_quota_change(ip, -ip->i_di.di_blocks, ip->i_di.di_uid,
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ip->i_di.di_gid);
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error = gfs2_meta_inode_buffer(ip, &dibh);
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if (error)
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goto out_trans;
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ip->i_di.di_flags |= GFS2_DIF_SYSTEM;
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gfs2_trans_add_bh(ip->i_gl, dibh, 1);
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gfs2_dinode_out(&ip->i_di, dibh->b_data);
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brelse(dibh);
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drop_dentries(ip);
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out_trans:
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gfs2_trans_end(sdp);
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out_ipreserv:
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if (alloc_required)
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gfs2_inplace_release(new_dip);
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out_alloc2:
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if (alloc_required)
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gfs2_alloc_put(new_dip);
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out_unhold:
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gfs2_quota_unhold(ip);
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out_alloc:
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gfs2_alloc_put(ip);
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out_gunlock:
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gfs2_glock_dq_m(3, ghs);
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out:
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gfs2_holder_uninit(ghs);
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gfs2_holder_uninit(ghs + 1);
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gfs2_holder_uninit(ghs + 2);
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return error;
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}
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