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GFS2: Add set_xquota support
This patch adds the ability to set GFS2 quota limit and warning levels via the XFS quota API. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
parent
113d6b3c99
commit
e285c10036
198
fs/gfs2/quota.c
198
fs/gfs2/quota.c
@ -615,8 +615,9 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change)
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* gfs2_adjust_quota - adjust record of current block usage
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* @ip: The quota inode
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* @loc: Offset of the entry in the quota file
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* @change: The amount of change to record
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* @change: The amount of usage change to record
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* @qd: The quota data
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* @fdq: The updated limits to record
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*
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* This function was mostly borrowed from gfs2_block_truncate_page which was
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* in turn mostly borrowed from ext3
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@ -625,19 +626,21 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change)
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*/
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static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
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s64 change, struct gfs2_quota_data *qd)
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s64 change, struct gfs2_quota_data *qd,
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struct fs_disk_quota *fdq)
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{
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struct inode *inode = &ip->i_inode;
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struct address_space *mapping = inode->i_mapping;
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unsigned long index = loc >> PAGE_CACHE_SHIFT;
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unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
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unsigned blocksize, iblock, pos;
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struct buffer_head *bh;
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struct buffer_head *bh, *dibh;
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struct page *page;
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void *kaddr;
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struct gfs2_quota *qp;
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s64 value;
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int err = -EIO;
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u64 size;
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if (gfs2_is_stuffed(ip))
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gfs2_unstuff_dinode(ip, NULL);
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@ -683,9 +686,34 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
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value = (s64)be64_to_cpu(qp->qu_value) + change;
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qp->qu_value = cpu_to_be64(value);
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qd->qd_qb.qb_value = qp->qu_value;
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if (fdq) {
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if (fdq->d_fieldmask & FS_DQ_BSOFT) {
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qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit);
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qd->qd_qb.qb_warn = qp->qu_warn;
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}
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if (fdq->d_fieldmask & FS_DQ_BHARD) {
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qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit);
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qd->qd_qb.qb_limit = qp->qu_limit;
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}
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}
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flush_dcache_page(page);
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kunmap_atomic(kaddr, KM_USER0);
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err = 0;
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err = gfs2_meta_inode_buffer(ip, &dibh);
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if (err)
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goto unlock;
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size = loc + sizeof(struct gfs2_quota);
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if (size > inode->i_size) {
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ip->i_disksize = size;
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i_size_write(inode, size);
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}
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inode->i_mtime = inode->i_atime = CURRENT_TIME;
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gfs2_trans_add_bh(ip->i_gl, dibh, 1);
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gfs2_dinode_out(ip, dibh->b_data);
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brelse(dibh);
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mark_inode_dirty(inode);
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unlock:
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unlock_page(page);
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page_cache_release(page);
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@ -713,6 +741,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
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return -ENOMEM;
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sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
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mutex_lock_nested(&ip->i_inode.i_mutex, I_MUTEX_QUOTA);
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for (qx = 0; qx < num_qd; qx++) {
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error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
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GL_NOCACHE, &ghs[qx]);
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@ -768,8 +797,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
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for (x = 0; x < num_qd; x++) {
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qd = qda[x];
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offset = qd2offset(qd);
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error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync,
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(struct gfs2_quota_data *)qd);
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error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
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if (error)
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goto out_end_trans;
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@ -789,20 +817,44 @@ out_gunlock:
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out:
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while (qx--)
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gfs2_glock_dq_uninit(&ghs[qx]);
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mutex_unlock(&ip->i_inode.i_mutex);
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kfree(ghs);
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gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
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return error;
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}
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static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
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{
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struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
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struct gfs2_quota q;
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struct gfs2_quota_lvb *qlvb;
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loff_t pos;
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int error;
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memset(&q, 0, sizeof(struct gfs2_quota));
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pos = qd2offset(qd);
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error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q));
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if (error < 0)
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return error;
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qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
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qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
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qlvb->__pad = 0;
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qlvb->qb_limit = q.qu_limit;
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qlvb->qb_warn = q.qu_warn;
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qlvb->qb_value = q.qu_value;
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qd->qd_qb = *qlvb;
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return 0;
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}
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static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
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struct gfs2_holder *q_gh)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
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struct gfs2_holder i_gh;
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struct gfs2_quota q;
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int error;
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struct gfs2_quota_lvb *qlvb;
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restart:
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error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
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@ -812,7 +864,6 @@ restart:
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qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
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if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
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loff_t pos;
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gfs2_glock_dq_uninit(q_gh);
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error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
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GL_NOCACHE, q_gh);
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@ -823,25 +874,11 @@ restart:
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if (error)
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goto fail;
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memset(&q, 0, sizeof(struct gfs2_quota));
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pos = qd2offset(qd);
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error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q));
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if (error < 0)
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error = update_qd(sdp, qd);
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if (error)
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goto fail_gunlock;
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if ((error < sizeof(q)) && force_refresh) {
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error = -ENOENT;
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goto fail_gunlock;
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}
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gfs2_glock_dq_uninit(&i_gh);
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qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
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qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
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qlvb->__pad = 0;
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qlvb->qb_limit = q.qu_limit;
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qlvb->qb_warn = q.qu_warn;
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qlvb->qb_value = q.qu_value;
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qd->qd_qb = *qlvb;
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gfs2_glock_dq_uninit(q_gh);
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force_refresh = 0;
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goto restart;
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@ -1409,9 +1446,118 @@ out:
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return error;
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}
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/* GFS2 only supports a subset of the XFS fields */
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#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD)
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static int gfs2_xquota_set(struct super_block *sb, int type, qid_t id,
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struct fs_disk_quota *fdq)
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{
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struct gfs2_sbd *sdp = sb->s_fs_info;
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struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
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struct gfs2_quota_data *qd;
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struct gfs2_holder q_gh, i_gh;
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unsigned int data_blocks, ind_blocks;
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unsigned int blocks = 0;
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int alloc_required;
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struct gfs2_alloc *al;
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loff_t offset;
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int error;
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if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
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return -ESRCH; /* Crazy XFS error code */
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switch(type) {
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case USRQUOTA:
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type = QUOTA_USER;
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if (fdq->d_flags != XFS_USER_QUOTA)
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return -EINVAL;
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break;
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case GRPQUOTA:
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type = QUOTA_GROUP;
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if (fdq->d_flags != XFS_GROUP_QUOTA)
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return -EINVAL;
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break;
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default:
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return -EINVAL;
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}
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if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
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return -EINVAL;
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if (fdq->d_id != id)
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return -EINVAL;
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error = qd_get(sdp, type, id, &qd);
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if (error)
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return error;
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mutex_lock(&ip->i_inode.i_mutex);
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error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
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if (error)
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goto out_put;
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error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
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if (error)
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goto out_q;
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/* Check for existing entry, if none then alloc new blocks */
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error = update_qd(sdp, qd);
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if (error)
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goto out_i;
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/* If nothing has changed, this is a no-op */
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if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
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(fdq->d_blk_softlimit == be64_to_cpu(qd->qd_qb.qb_warn)))
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fdq->d_fieldmask ^= FS_DQ_BSOFT;
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if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
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(fdq->d_blk_hardlimit == be64_to_cpu(qd->qd_qb.qb_limit)))
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fdq->d_fieldmask ^= FS_DQ_BHARD;
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if (fdq->d_fieldmask == 0)
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goto out_i;
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offset = qd2offset(qd);
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error = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota),
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&alloc_required);
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if (error)
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goto out_i;
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if (alloc_required) {
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al = gfs2_alloc_get(ip);
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if (al == NULL)
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goto out_i;
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gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
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&data_blocks, &ind_blocks);
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blocks = al->al_requested = 1 + 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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}
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error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0);
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if (error)
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goto out_release;
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/* Apply changes */
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error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
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gfs2_trans_end(sdp);
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out_release:
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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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gfs2_alloc_put(ip);
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}
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out_i:
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gfs2_glock_dq_uninit(&i_gh);
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out_q:
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gfs2_glock_dq_uninit(&q_gh);
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out_put:
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mutex_unlock(&ip->i_inode.i_mutex);
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qd_put(qd);
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return error;
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}
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const struct quotactl_ops gfs2_quotactl_ops = {
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.quota_sync = gfs2_quota_sync,
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.get_xstate = gfs2_quota_get_xstate,
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.get_xquota = gfs2_xquota_get,
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.set_xquota = gfs2_xquota_set,
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};
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