Merge commit 'origin/master' into next

Conflicts:
	include/linux/kvm.h

1 files changed, 300 insertions, 93 deletions

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 2e9b9326bfc9..e3bf6eab8750 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -15,7 +15,7 @@
  * fuzziness in the current usage value of IDs that are being used on different
  * nodes in the cluster simultaneously.  So, it is possible for a user on
  * multiple nodes to overrun their quota, but that overrun is controlable.
- * Since quota tags are part of transactions, there is no need to a quota check
+ * Since quota tags are part of transactions, there is no need for a quota check
  * program to be run on node crashes or anything like that.
  *
  * There are couple of knobs that let the administrator manage the quota
@@ -47,6 +47,8 @@
 #include <linux/gfs2_ondisk.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/quota.h>
+#include <linux/dqblk_xfs.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -65,13 +67,6 @@
 #define QUOTA_USER 1
 #define QUOTA_GROUP 0
 
-struct gfs2_quota_host {
-        u64 qu_limit;
-        u64 qu_warn;
-        s64 qu_value;
-        u32 qu_ll_next;
-};
-
 struct gfs2_quota_change_host {
         u64 qc_change;
         u32 qc_flags; /* GFS2_QCF_... */
@@ -164,7 +159,7 @@ fail:
         return error;
 }
 
-static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
+static int qd_get(struct gfs2_sbd *sdp, int user, u32 id,
                   struct gfs2_quota_data **qdp)
 {
         struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
@@ -202,7 +197,7 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
 
                 spin_unlock(&qd_lru_lock);
 
-                if (qd || !create) {
+                if (qd) {
                         if (new_qd) {
                                 gfs2_glock_put(new_qd->qd_gl);
                                 kmem_cache_free(gfs2_quotad_cachep, new_qd);
@@ -461,12 +456,12 @@ static void qd_unlock(struct gfs2_quota_data *qd)
         qd_put(qd);
 }
 
-static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
+static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id,
                     struct gfs2_quota_data **qdp)
 {
         int error;
 
-        error = qd_get(sdp, user, id, create, qdp);
+        error = qd_get(sdp, user, id, qdp);
         if (error)
                 return error;
 
@@ -508,20 +503,20 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
                 return 0;
 
-        error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, CREATE, qd);
+        error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd);
         if (error)
                 goto out;
         al->al_qd_num++;
         qd++;
 
-        error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, CREATE, qd);
+        error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd);
         if (error)
                 goto out;
         al->al_qd_num++;
         qd++;
 
         if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) {
-                error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd);
+                error = qdsb_get(sdp, QUOTA_USER, uid, qd);
                 if (error)
                         goto out;
                 al->al_qd_num++;
@@ -529,7 +524,7 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
         }
 
         if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) {
-                error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd);
+                error = qdsb_get(sdp, QUOTA_GROUP, gid, qd);
                 if (error)
                         goto out;
                 al->al_qd_num++;
@@ -617,48 +612,36 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change)
         mutex_unlock(&sdp->sd_quota_mutex);
 }
 
-static void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf)
-{
-        const struct gfs2_quota *str = buf;
-
-        qu->qu_limit = be64_to_cpu(str->qu_limit);
-        qu->qu_warn = be64_to_cpu(str->qu_warn);
-        qu->qu_value = be64_to_cpu(str->qu_value);
-        qu->qu_ll_next = be32_to_cpu(str->qu_ll_next);
-}
-
-static void gfs2_quota_out(const struct gfs2_quota_host *qu, void *buf)
-{
-        struct gfs2_quota *str = buf;
-
-        str->qu_limit = cpu_to_be64(qu->qu_limit);
-        str->qu_warn = cpu_to_be64(qu->qu_warn);
-        str->qu_value = cpu_to_be64(qu->qu_value);
-        str->qu_ll_next = cpu_to_be32(qu->qu_ll_next);
-        memset(&str->qu_reserved, 0, sizeof(str->qu_reserved));
-}
-
 /**
- * gfs2_adjust_quota
+ * gfs2_adjust_quota - adjust record of current block usage
+ * @ip: The quota inode
+ * @loc: Offset of the entry in the quota file
+ * @change: The amount of usage change to record
+ * @qd: The quota data
+ * @fdq: The updated limits to record
  *
  * This function was mostly borrowed from gfs2_block_truncate_page which was
  * in turn mostly borrowed from ext3
+ *
+ * Returns: 0 or -ve on error
  */
+
 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
-                             s64 change, struct gfs2_quota_data *qd)
+                             s64 change, struct gfs2_quota_data *qd,
+                             struct fs_disk_quota *fdq)
 {
         struct inode *inode = &ip->i_inode;
         struct address_space *mapping = inode->i_mapping;
         unsigned long index = loc >> PAGE_CACHE_SHIFT;
         unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
         unsigned blocksize, iblock, pos;
-        struct buffer_head *bh;
+        struct buffer_head *bh, *dibh;
         struct page *page;
         void *kaddr;
-        char *ptr;
-        struct gfs2_quota_host qp;
+        struct gfs2_quota *qp;
         s64 value;
         int err = -EIO;
+        u64 size;
 
         if (gfs2_is_stuffed(ip))
                 gfs2_unstuff_dinode(ip, NULL);
@@ -700,18 +683,38 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
         gfs2_trans_add_bh(ip->i_gl, bh, 0);
 
         kaddr = kmap_atomic(page, KM_USER0);
-        ptr = kaddr + offset;
-        gfs2_quota_in(&qp, ptr);
-        qp.qu_value += change;
-        value = qp.qu_value;
-        gfs2_quota_out(&qp, ptr);
+        qp = kaddr + offset;
+        value = (s64)be64_to_cpu(qp->qu_value) + change;
+        qp->qu_value = cpu_to_be64(value);
+        qd->qd_qb.qb_value = qp->qu_value;
+        if (fdq) {
+                if (fdq->d_fieldmask & FS_DQ_BSOFT) {
+                        qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit);
+                        qd->qd_qb.qb_warn = qp->qu_warn;
+                }
+                if (fdq->d_fieldmask & FS_DQ_BHARD) {
+                        qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit);
+                        qd->qd_qb.qb_limit = qp->qu_limit;
+                }
+        }
         flush_dcache_page(page);
         kunmap_atomic(kaddr, KM_USER0);
-        err = 0;
-        qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC);
-        qd->qd_qb.qb_value = cpu_to_be64(value);
-        ((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_magic = cpu_to_be32(GFS2_MAGIC);
-        ((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_value = cpu_to_be64(value);
+
+        err = gfs2_meta_inode_buffer(ip, &dibh);
+        if (err)
+                goto unlock;
+
+        size = loc + sizeof(struct gfs2_quota);
+        if (size > inode->i_size) {
+                ip->i_disksize = size;
+                i_size_write(inode, size);
+        }
+        inode->i_mtime = inode->i_atime = CURRENT_TIME;
+        gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+        gfs2_dinode_out(ip, dibh->b_data);
+        brelse(dibh);
+        mark_inode_dirty(inode);
+
 unlock:
         unlock_page(page);
         page_cache_release(page);
@@ -739,9 +742,9 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
                 return -ENOMEM;
 
         sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
+        mutex_lock_nested(&ip->i_inode.i_mutex, I_MUTEX_QUOTA);
         for (qx = 0; qx < num_qd; qx++) {
-                error = gfs2_glock_nq_init(qda[qx]->qd_gl,
-                                           LM_ST_EXCLUSIVE,
+                error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
                                            GL_NOCACHE, &ghs[qx]);
                 if (error)
                         goto out;
@@ -795,9 +798,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
         for (x = 0; x < num_qd; x++) {
                 qd = qda[x];
                 offset = qd2offset(qd);
-                error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync,
-                                          (struct gfs2_quota_data *)
-                                          qd);
+                error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
                 if (error)
                         goto out_end_trans;
 
@@ -817,21 +818,44 @@ out_gunlock:
 out:
         while (qx--)
                 gfs2_glock_dq_uninit(&ghs[qx]);
+        mutex_unlock(&ip->i_inode.i_mutex);
         kfree(ghs);
         gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
         return error;
 }
 
+static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
+{
+        struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
+        struct gfs2_quota q;
+        struct gfs2_quota_lvb *qlvb;
+        loff_t pos;
+        int error;
+
+        memset(&q, 0, sizeof(struct gfs2_quota));
+        pos = qd2offset(qd);
+        error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q));
+        if (error < 0)
+                return error;
+
+        qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+        qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
+        qlvb->__pad = 0;
+        qlvb->qb_limit = q.qu_limit;
+        qlvb->qb_warn = q.qu_warn;
+        qlvb->qb_value = q.qu_value;
+        qd->qd_qb = *qlvb;
+
+        return 0;
+}
+
 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
                     struct gfs2_holder *q_gh)
 {
         struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
         struct gfs2_holder i_gh;
-        struct gfs2_quota_host q;
-        char buf[sizeof(struct gfs2_quota)];
         int error;
-        struct gfs2_quota_lvb *qlvb;
 
 restart:
         error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
@@ -841,11 +865,9 @@ restart:
         qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
 
         if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
-                loff_t pos;
                 gfs2_glock_dq_uninit(q_gh);
-                error = gfs2_glock_nq_init(qd->qd_gl,
-                                           LM_ST_EXCLUSIVE, GL_NOCACHE,
-                                           q_gh);
+                error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
+                                           GL_NOCACHE, q_gh);
                 if (error)
                         return error;
 
@@ -853,29 +875,14 @@ restart:
                 if (error)
                         goto fail;
 
-                memset(buf, 0, sizeof(struct gfs2_quota));
-                pos = qd2offset(qd);
-                error = gfs2_internal_read(ip, NULL, buf, &pos,
-                                           sizeof(struct gfs2_quota));
-                if (error < 0)
+                error = update_qd(sdp, qd);
+                if (error)
                         goto fail_gunlock;
 
                 gfs2_glock_dq_uninit(&i_gh);
-
-                gfs2_quota_in(&q, buf);
-                qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
-                qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
-                qlvb->__pad = 0;
-                qlvb->qb_limit = cpu_to_be64(q.qu_limit);
-                qlvb->qb_warn = cpu_to_be64(q.qu_warn);
-                qlvb->qb_value = cpu_to_be64(q.qu_value);
-                qd->qd_qb = *qlvb;
-
-                if (gfs2_glock_is_blocking(qd->qd_gl)) {
-                        gfs2_glock_dq_uninit(q_gh);
-                        force_refresh = 0;
-                        goto restart;
-                }
+                gfs2_glock_dq_uninit(q_gh);
+                force_refresh = 0;
+                goto restart;
         }
 
         return 0;
@@ -995,7 +1002,7 @@ static int print_message(struct gfs2_quota_data *qd, char *type)
 {
         struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
 
-        printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\r\n",
+        printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n",
                sdp->sd_fsname, type,
                (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group",
                qd->qd_id);
@@ -1032,6 +1039,10 @@ int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
 
                 if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
                         print_message(qd, "exceeded");
+                        quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ?
+                                           USRQUOTA : GRPQUOTA, qd->qd_id,
+                                           sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
+
                         error = -EDQUOT;
                         break;
                 } else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
@@ -1039,6 +1050,9 @@ int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
                            time_after_eq(jiffies, qd->qd_last_warn +
                                          gfs2_tune_get(sdp,
                                                 gt_quota_warn_period) * HZ)) {
+                        quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ?
+                                           USRQUOTA : GRPQUOTA, qd->qd_id,
+                                           sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
                         error = print_message(qd, "warning");
                         qd->qd_last_warn = jiffies;
                 }
@@ -1069,8 +1083,9 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
         }
 }
 
-int gfs2_quota_sync(struct gfs2_sbd *sdp)
+int gfs2_quota_sync(struct super_block *sb, int type)
 {
+        struct gfs2_sbd *sdp = sb->s_fs_info;
         struct gfs2_quota_data **qda;
         unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
         unsigned int num_qd;
@@ -1118,7 +1133,7 @@ int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
         struct gfs2_holder q_gh;
         int error;
 
-        error = qd_get(sdp, user, id, CREATE, &qd);
+        error = qd_get(sdp, user, id, &qd);
         if (error)
                 return error;
 
@@ -1127,7 +1142,6 @@ int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
                 gfs2_glock_dq_uninit(&q_gh);
 
         qd_put(qd);
-
         return error;
 }
 
@@ -1298,12 +1312,12 @@ static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
 }
 
 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
-                               int (*fxn)(struct gfs2_sbd *sdp),
+                               int (*fxn)(struct super_block *sb, int type),
                                unsigned long t, unsigned long *timeo,
                                unsigned int *new_timeo)
 {
         if (t >= *timeo) {
-                int error = fxn(sdp);
+                int error = fxn(sdp->sd_vfs, 0);
                 quotad_error(sdp, msg, error);
                 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
         } else {
@@ -1330,6 +1344,14 @@ static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
         }
 }
 
+void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
+        if (!sdp->sd_statfs_force_sync) {
+                sdp->sd_statfs_force_sync = 1;
+                wake_up(&sdp->sd_quota_wait);
+        }
+}
+
+
 /**
  * gfs2_quotad - Write cached quota changes into the quota file
  * @sdp: Pointer to GFS2 superblock
@@ -1349,8 +1371,15 @@ int gfs2_quotad(void *data)
         while (!kthread_should_stop()) {
 
                 /* Update the master statfs file */
-                quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
-                                   &statfs_timeo, &tune->gt_statfs_quantum);
+                if (sdp->sd_statfs_force_sync) {
+                        int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
+                        quotad_error(sdp, "statfs", error);
+                        statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
+                }
+                else
+                        quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
+                                           &statfs_timeo,
+                                           &tune->gt_statfs_quantum);
 
                 /* Update quota file */
                 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
@@ -1367,7 +1396,7 @@ int gfs2_quotad(void *data)
                 spin_lock(&sdp->sd_trunc_lock);
                 empty = list_empty(&sdp->sd_trunc_list);
                 spin_unlock(&sdp->sd_trunc_lock);
-                if (empty)
+                if (empty && !sdp->sd_statfs_force_sync)
                         t -= schedule_timeout(t);
                 else
                         t = 0;
@@ -1377,3 +1406,181 @@ int gfs2_quotad(void *data)
         return 0;
 }
 
+static int gfs2_quota_get_xstate(struct super_block *sb,
+                                 struct fs_quota_stat *fqs)
+{
+        struct gfs2_sbd *sdp = sb->s_fs_info;
+
+        memset(fqs, 0, sizeof(struct fs_quota_stat));
+        fqs->qs_version = FS_QSTAT_VERSION;
+        if (sdp->sd_args.ar_quota == GFS2_QUOTA_ON)
+                fqs->qs_flags = (XFS_QUOTA_UDQ_ENFD | XFS_QUOTA_GDQ_ENFD);
+        else if (sdp->sd_args.ar_quota == GFS2_QUOTA_ACCOUNT)
+                fqs->qs_flags = (XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_GDQ_ACCT);
+        if (sdp->sd_quota_inode) {
+                fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
+                fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
+        }
+        fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
+        fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
+        fqs->qs_incoredqs = atomic_read(&qd_lru_count);
+        return 0;
+}
+
+static int gfs2_xquota_get(struct super_block *sb, int type, qid_t id,
+                           struct fs_disk_quota *fdq)
+{
+        struct gfs2_sbd *sdp = sb->s_fs_info;
+        struct gfs2_quota_lvb *qlvb;
+        struct gfs2_quota_data *qd;
+        struct gfs2_holder q_gh;
+        int error;
+
+        memset(fdq, 0, sizeof(struct fs_disk_quota));
+
+        if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
+                return -ESRCH; /* Crazy XFS error code */
+
+        if (type == USRQUOTA)
+                type = QUOTA_USER;
+        else if (type == GRPQUOTA)
+                type = QUOTA_GROUP;
+        else
+                return -EINVAL;
+
+        error = qd_get(sdp, type, id, &qd);
+        if (error)
+                return error;
+        error = do_glock(qd, FORCE, &q_gh);
+        if (error)
+                goto out;
+
+        qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+        fdq->d_version = FS_DQUOT_VERSION;
+        fdq->d_flags = (type == QUOTA_USER) ? XFS_USER_QUOTA : XFS_GROUP_QUOTA;
+        fdq->d_id = id;
+        fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit);
+        fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn);
+        fdq->d_bcount = be64_to_cpu(qlvb->qb_value);
+
+        gfs2_glock_dq_uninit(&q_gh);
+out:
+        qd_put(qd);
+        return error;
+}
+
+/* GFS2 only supports a subset of the XFS fields */
+#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD)
+
+static int gfs2_xquota_set(struct super_block *sb, int type, qid_t id,
+                           struct fs_disk_quota *fdq)
+{
+        struct gfs2_sbd *sdp = sb->s_fs_info;
+        struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
+        struct gfs2_quota_data *qd;
+        struct gfs2_holder q_gh, i_gh;
+        unsigned int data_blocks, ind_blocks;
+        unsigned int blocks = 0;
+        int alloc_required;
+        struct gfs2_alloc *al;
+        loff_t offset;
+        int error;
+
+        if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
+                return -ESRCH; /* Crazy XFS error code */
+
+        switch(type) {
+        case USRQUOTA:
+                type = QUOTA_USER;
+                if (fdq->d_flags != XFS_USER_QUOTA)
+                        return -EINVAL;
+                break;
+        case GRPQUOTA:
+                type = QUOTA_GROUP;
+                if (fdq->d_flags != XFS_GROUP_QUOTA)
+                        return -EINVAL;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
+                return -EINVAL;
+        if (fdq->d_id != id)
+                return -EINVAL;
+
+        error = qd_get(sdp, type, id, &qd);
+        if (error)
+                return error;
+
+        mutex_lock(&ip->i_inode.i_mutex);
+        error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
+        if (error)
+                goto out_put;
+        error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+        if (error)
+                goto out_q;
+
+        /* Check for existing entry, if none then alloc new blocks */
+        error = update_qd(sdp, qd);
+        if (error)
+                goto out_i;
+
+        /* If nothing has changed, this is a no-op */
+        if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
+            (fdq->d_blk_softlimit == be64_to_cpu(qd->qd_qb.qb_warn)))
+                fdq->d_fieldmask ^= FS_DQ_BSOFT;
+        if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
+            (fdq->d_blk_hardlimit == be64_to_cpu(qd->qd_qb.qb_limit)))
+                fdq->d_fieldmask ^= FS_DQ_BHARD;
+        if (fdq->d_fieldmask == 0)
+                goto out_i;
+
+        offset = qd2offset(qd);
+        error = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota),
+                                          &alloc_required);
+        if (error)
+                goto out_i;
+        if (alloc_required) {
+                al = gfs2_alloc_get(ip);
+                if (al == NULL)
+                        goto out_i;
+                gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
+                                       &data_blocks, &ind_blocks);
+                blocks = al->al_requested = 1 + data_blocks + ind_blocks;
+                error = gfs2_inplace_reserve(ip);
+                if (error)
+                        goto out_alloc;
+        }
+
+        error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0);
+        if (error)
+                goto out_release;
+
+        /* Apply changes */
+        error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
+
+        gfs2_trans_end(sdp);
+out_release:
+        if (alloc_required) {
+                gfs2_inplace_release(ip);
+out_alloc:
+                gfs2_alloc_put(ip);
+        }
+out_i:
+        gfs2_glock_dq_uninit(&i_gh);
+out_q:
+        gfs2_glock_dq_uninit(&q_gh);
+out_put:
+        mutex_unlock(&ip->i_inode.i_mutex);
+        qd_put(qd);
+        return error;
+}
+
+const struct quotactl_ops gfs2_quotactl_ops = {
+        .quota_sync     = gfs2_quota_sync,
+        .get_xstate     = gfs2_quota_get_xstate,
+        .get_xquota     = gfs2_xquota_get,
+        .set_xquota     = gfs2_xquota_set,
+};
+