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Diffstat (limited to 'fs/gfs2/quota.c')
-rw-r--r--fs/gfs2/quota.c114
1 files changed, 81 insertions, 33 deletions
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 69e8f4e92e5..138fdf559a9 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -43,20 +43,22 @@
#include <linux/buffer_head.h>
#include <linux/tty.h>
#include <linux/sort.h>
+#include <linux/fs.h>
#include <asm/semaphore.h>
#include "gfs2.h"
#include "bmap.h"
#include "glock.h"
#include "glops.h"
-#include "jdata.h"
#include "log.h"
#include "meta_io.h"
#include "quota.h"
#include "rgrp.h"
#include "super.h"
#include "trans.h"
+#include "inode.h"
#include "ops_file.h"
+#include "ops_address.h"
#define QUOTA_USER 1
#define QUOTA_GROUP 0
@@ -561,6 +563,81 @@ static void do_qc(struct gfs2_quota_data *qd, int64_t change)
up(&sdp->sd_quota_mutex);
}
+/**
+ * gfs2_adjust_quota
+ *
+ * This function was mostly borrowed from gfs2_block_truncate_page which was
+ * in turn mostly borrowed from ext3
+ */
+static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
+ int64_t change, struct gfs2_quota_data *qd)
+{
+ struct inode *inode = gfs2_ip2v(ip);
+ struct address_space *mapping = inode->i_mapping;
+ unsigned long index = loc >> PAGE_CACHE_SHIFT;
+ unsigned offset = loc & (PAGE_CACHE_SHIFT - 1);
+ unsigned blocksize, iblock, pos;
+ struct buffer_head *bh;
+ struct page *page;
+ void *kaddr;
+ __be64 *ptr;
+ u64 value;
+ int err = -EIO;
+
+ page = grab_cache_page(mapping, index);
+ if (!page)
+ return -ENOMEM;
+
+ blocksize = inode->i_sb->s_blocksize;
+ iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
+
+ if (!page_has_buffers(page))
+ create_empty_buffers(page, blocksize, 0);
+
+ bh = page_buffers(page);
+ pos = blocksize;
+ while (offset >= pos) {
+ bh = bh->b_this_page;
+ iblock++;
+ pos += blocksize;
+ }
+
+ if (!buffer_mapped(bh)) {
+ gfs2_get_block(inode, iblock, bh, 1);
+ if (!buffer_mapped(bh))
+ goto unlock;
+ }
+
+ if (PageUptodate(page))
+ set_buffer_uptodate(bh);
+
+ if (!buffer_uptodate(bh)) {
+ ll_rw_block(READ, 1, &bh);
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh))
+ goto unlock;
+ }
+
+ gfs2_trans_add_bh(ip->i_gl, bh, 0);
+
+ kaddr = kmap_atomic(page, KM_USER0);
+ ptr = (__be64 *)(kaddr + offset);
+ value = *ptr = cpu_to_be64(be64_to_cpu(*ptr) + change);
+ flush_dcache_page(page);
+ kunmap_atomic(kaddr, KM_USER0);
+ err = 0;
+ qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC);
+#if 0
+ qd->qd_qb.qb_limit = cpu_to_be64(q.qu_limit);
+ qd->qd_qb.qb_warn = cpu_to_be64(q.qu_warn);
+#endif
+ qd->qd_qb.qb_value = cpu_to_be64(value);
+unlock:
+ unlock_page(page);
+ page_cache_release(page);
+ return err;
+}
+
static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
{
struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
@@ -635,43 +712,14 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
file_ra_state_init(&ra_state, ip->i_vnode->i_mapping);
for (x = 0; x < num_qd; x++) {
- char buf[sizeof(struct gfs2_quota)];
- struct gfs2_quota q;
-
qd = qda[x];
offset = qd2offset(qd);
-
- /* The quota file may not be a multiple of
- sizeof(struct gfs2_quota) bytes. */
- memset(buf, 0, sizeof(struct gfs2_quota));
-
- error = gfs2_internal_read(ip, &ra_state, buf, &offset,
- sizeof(struct gfs2_quota));
- if (error < 0)
+ error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync,
+ (struct gfs2_quota_data *)qd->qd_gl->gl_lvb);
+ if (error)
goto out_end_trans;
- gfs2_quota_in(&q, buf);
- q.qu_value += qda[x]->qd_change_sync;
- gfs2_quota_out(&q, buf);
-
- error = gfs2_jdata_write_mem(ip, buf, offset,
- sizeof(struct gfs2_quota));
- if (error < 0)
- goto out_end_trans;
- else if (error != sizeof(struct gfs2_quota)) {
- error = -EIO;
- goto out_end_trans;
- }
-
do_qc(qd, -qd->qd_change_sync);
-
- memset(&qd->qd_qb, 0, sizeof(struct gfs2_quota_lvb));
- qd->qd_qb.qb_magic = GFS2_MAGIC;
- qd->qd_qb.qb_limit = q.qu_limit;
- qd->qd_qb.qb_warn = q.qu_warn;
- qd->qd_qb.qb_value = q.qu_value;
-
- gfs2_quota_lvb_out(&qd->qd_qb, qd->qd_gl->gl_lvb);
}
error = 0;