Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw

Pull GFS2 updates from Steven Whitehouse.

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
  GFS2: Eliminate 64-bit divides
  GFS2: Reduce file fragmentation
  GFS2: kernel panic with small gfs2 filesystems - 1 RG
  GFS2: Fixing double brelse'ing bh allocated in gfs2_meta_read when EIO occurs
  GFS2: Combine functions get_local_rgrp and gfs2_inplace_reserve
  GFS2: Add kobject release method
  GFS2: Size seq_file buffer more carefully
  GFS2: Use seq_vprintf for glocks debugfs file
  seq_file: Add seq_vprintf function and export it
  GFS2: Use lvbs for storing rgrp information with mount option
  GFS2: Cache last hash bucket for glock seq_files
  GFS2: Increase buffer size for glocks and glstats debugfs files
  GFS2: Fix error handling when reading an invalid block from the journal
  GFS2: Add "top dir" flag support
  GFS2: Fold quota data into the reservations struct
  GFS2: Extend the life of the reservations

23 files changed, 1121 insertions, 371 deletions

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index e80a464850c8..d6526347d386 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -614,7 +614,6 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
         unsigned int data_blocks = 0, ind_blocks = 0, rblocks;
         int alloc_required;
         int error = 0;
-        struct gfs2_qadata *qa = NULL;
         pgoff_t index = pos >> PAGE_CACHE_SHIFT;
         unsigned from = pos & (PAGE_CACHE_SIZE - 1);
         struct page *page;
@@ -638,15 +637,9 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
                 gfs2_write_calc_reserv(ip, len, &data_blocks, &ind_blocks);
 
         if (alloc_required) {
-                qa = gfs2_qadata_get(ip);
-                if (!qa) {
-                        error = -ENOMEM;
-                        goto out_unlock;
-                }
-
                 error = gfs2_quota_lock_check(ip);
                 if (error)
-                        goto out_alloc_put;
+                        goto out_unlock;
 
                 error = gfs2_inplace_reserve(ip, data_blocks + ind_blocks);
                 if (error)
@@ -708,8 +701,6 @@ out_trans_fail:
                 gfs2_inplace_release(ip);
 out_qunlock:
                 gfs2_quota_unlock(ip);
-out_alloc_put:
-                gfs2_qadata_put(ip);
         }
 out_unlock:
         if (&ip->i_inode == sdp->sd_rindex) {
@@ -846,7 +837,6 @@ static int gfs2_write_end(struct file *file, struct address_space *mapping,
         struct gfs2_sbd *sdp = GFS2_SB(inode);
         struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
         struct buffer_head *dibh;
-        struct gfs2_qadata *qa = ip->i_qadata;
         unsigned int from = pos & (PAGE_CACHE_SIZE - 1);
         unsigned int to = from + len;
         int ret;
@@ -878,12 +868,10 @@ static int gfs2_write_end(struct file *file, struct address_space *mapping,
         brelse(dibh);
 failed:
         gfs2_trans_end(sdp);
-        if (ip->i_res)
+        if (gfs2_mb_reserved(ip))
                 gfs2_inplace_release(ip);
-        if (qa) {
+        if (ip->i_res->rs_qa_qd_num)
                 gfs2_quota_unlock(ip);
-                gfs2_qadata_put(ip);
-        }
         if (inode == sdp->sd_rindex) {
                 gfs2_glock_dq(&m_ip->i_gh);
                 gfs2_holder_uninit(&m_ip->i_gh);
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index dab54099dd98..49cd7dd4a9fa 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -785,6 +785,9 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
         if (error)
                 goto out_rlist;
 
+        if (gfs2_rs_active(ip->i_res)) /* needs to be done with the rgrp glock held */
+                gfs2_rs_deltree(ip->i_res);
+
         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
                                  RES_INDIRECT + RES_STATFS + RES_QUOTA,
                                  revokes);
@@ -1045,12 +1048,13 @@ static int trunc_dealloc(struct gfs2_inode *ip, u64 size)
                 lblock = (size - 1) >> sdp->sd_sb.sb_bsize_shift;
 
         find_metapath(sdp, lblock, &mp, ip->i_height);
-        if (!gfs2_qadata_get(ip))
-                return -ENOMEM;
+        error = gfs2_rindex_update(sdp);
+        if (error)
+                return error;
 
         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
-                goto out;
+                return error;
 
         while (height--) {
                 struct strip_mine sm;
@@ -1064,8 +1068,6 @@ static int trunc_dealloc(struct gfs2_inode *ip, u64 size)
 
         gfs2_quota_unhold(ip);
 
-out:
-        gfs2_qadata_put(ip);
         return error;
 }
 
@@ -1167,19 +1169,14 @@ static int do_grow(struct inode *inode, u64 size)
         struct gfs2_inode *ip = GFS2_I(inode);
         struct gfs2_sbd *sdp = GFS2_SB(inode);
         struct buffer_head *dibh;
-        struct gfs2_qadata *qa = NULL;
         int error;
         int unstuff = 0;
 
         if (gfs2_is_stuffed(ip) &&
             (size > (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)))) {
-                qa = gfs2_qadata_get(ip);
-                if (qa == NULL)
-                        return -ENOMEM;
-
                 error = gfs2_quota_lock_check(ip);
                 if (error)
-                        goto do_grow_alloc_put;
+                        return error;
 
                 error = gfs2_inplace_reserve(ip, 1);
                 if (error)
@@ -1214,8 +1211,6 @@ do_grow_release:
                 gfs2_inplace_release(ip);
 do_grow_qunlock:
                 gfs2_quota_unlock(ip);
-do_grow_alloc_put:
-                gfs2_qadata_put(ip);
         }
         return error;
 }
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 8aaeb07a07b5..259b088cfc4c 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1854,14 +1854,9 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
         if (!ht)
                 return -ENOMEM;
 
-        if (!gfs2_qadata_get(dip)) {
-                error = -ENOMEM;
-                goto out;
-        }
-
         error = gfs2_quota_hold(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
-                goto out_put;
+                goto out;
 
         /*  Count the number of leaves  */
         bh = leaf_bh;
@@ -1942,8 +1937,6 @@ out_rg_gunlock:
 out_rlist:
         gfs2_rlist_free(&rlist);
         gfs2_quota_unhold(dip);
-out_put:
-        gfs2_qadata_put(dip);
 out:
         kfree(ht);
         return error;
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 31b199f6efc1..9aa6af13823c 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -142,6 +142,7 @@ static const u32 fsflags_to_gfs2[32] = {
         [7] = GFS2_DIF_NOATIME,
         [12] = GFS2_DIF_EXHASH,
         [14] = GFS2_DIF_INHERIT_JDATA,
+        [17] = GFS2_DIF_TOPDIR,
 };
 
 static const u32 gfs2_to_fsflags[32] = {
@@ -150,6 +151,7 @@ static const u32 gfs2_to_fsflags[32] = {
         [gfs2fl_AppendOnly] = FS_APPEND_FL,
         [gfs2fl_NoAtime] = FS_NOATIME_FL,
         [gfs2fl_ExHash] = FS_INDEX_FL,
+        [gfs2fl_TopLevel] = FS_TOPDIR_FL,
         [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
 };
 
@@ -203,6 +205,7 @@ void gfs2_set_inode_flags(struct inode *inode)
                              GFS2_DIF_NOATIME|                  \
                              GFS2_DIF_SYNC|                     \
                              GFS2_DIF_SYSTEM|                   \
+                             GFS2_DIF_TOPDIR|                   \
                              GFS2_DIF_INHERIT_JDATA)
 
 /**
@@ -298,6 +301,7 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
 
         gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
         if (!S_ISDIR(inode->i_mode)) {
+                gfsflags &= ~GFS2_DIF_TOPDIR;
                 if (gfsflags & GFS2_DIF_INHERIT_JDATA)
                         gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
                 return do_gfs2_set_flags(filp, gfsflags, ~0);
@@ -366,7 +370,6 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
         u64 pos = page->index << PAGE_CACHE_SHIFT;
         unsigned int data_blocks, ind_blocks, rblocks;
         struct gfs2_holder gh;
-        struct gfs2_qadata *qa;
         loff_t size;
         int ret;
 
@@ -376,6 +379,13 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
          */
         vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
 
+        ret = gfs2_rs_alloc(ip);
+        if (ret)
+                return ret;
+
+        atomic_set(&ip->i_res->rs_sizehint,
+                   PAGE_CACHE_SIZE >> sdp->sd_sb.sb_bsize_shift);
+
         gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
         ret = gfs2_glock_nq(&gh);
         if (ret)
@@ -393,14 +403,13 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
                 goto out_unlock;
         }
 
-        ret = -ENOMEM;
-        qa = gfs2_qadata_get(ip);
-        if (qa == NULL)
+        ret = gfs2_rindex_update(sdp);
+        if (ret)
                 goto out_unlock;
 
         ret = gfs2_quota_lock_check(ip);
         if (ret)
-                goto out_alloc_put;
+                goto out_unlock;
         gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks);
         ret = gfs2_inplace_reserve(ip, data_blocks + ind_blocks);
         if (ret)
@@ -447,8 +456,6 @@ out_trans_fail:
         gfs2_inplace_release(ip);
 out_quota_unlock:
         gfs2_quota_unlock(ip);
-out_alloc_put:
-        gfs2_qadata_put(ip);
 out_unlock:
         gfs2_glock_dq(&gh);
 out:
@@ -567,16 +574,14 @@ fail:
 
 static int gfs2_release(struct inode *inode, struct file *file)
 {
-        struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
-        struct gfs2_file *fp;
+        struct gfs2_inode *ip = GFS2_I(inode);
 
-        fp = file->private_data;
+        kfree(file->private_data);
         file->private_data = NULL;
 
-        if (gfs2_assert_warn(sdp, fp))
-                return -EIO;
-
-        kfree(fp);
+        if ((file->f_mode & FMODE_WRITE) &&
+            (atomic_read(&inode->i_writecount) == 1))
+                gfs2_rs_delete(ip);
 
         return 0;
 }
@@ -653,12 +658,20 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
                                    unsigned long nr_segs, loff_t pos)
 {
         struct file *file = iocb->ki_filp;
+        size_t writesize = iov_length(iov, nr_segs);
+        struct dentry *dentry = file->f_dentry;
+        struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
+        struct gfs2_sbd *sdp;
+        int ret;
 
+        sdp = GFS2_SB(file->f_mapping->host);
+        ret = gfs2_rs_alloc(ip);
+        if (ret)
+                return ret;
+
+        atomic_set(&ip->i_res->rs_sizehint, writesize >> sdp->sd_sb.sb_bsize_shift);
         if (file->f_flags & O_APPEND) {
-                struct dentry *dentry = file->f_dentry;
-                struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
                 struct gfs2_holder gh;
-                int ret;
 
                 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
                 if (ret)
@@ -751,7 +764,6 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
         struct gfs2_inode *ip = GFS2_I(inode);
         unsigned int data_blocks = 0, ind_blocks = 0, rblocks;
         loff_t bytes, max_bytes;
-        struct gfs2_qadata *qa;
         int error;
         const loff_t pos = offset;
         const loff_t count = len;
@@ -774,11 +786,17 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
         if (bytes == 0)
                 bytes = sdp->sd_sb.sb_bsize;
 
+        error = gfs2_rs_alloc(ip);
+        if (error)
+                return error;
+
         gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);
         error = gfs2_glock_nq(&ip->i_gh);
         if (unlikely(error))
                 goto out_uninit;
 
+        atomic_set(&ip->i_res->rs_sizehint, len >> sdp->sd_sb.sb_bsize_shift);
+
         while (len > 0) {
                 if (len < bytes)
                         bytes = len;
@@ -787,15 +805,9 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
                         offset += bytes;
                         continue;
                 }
-                qa = gfs2_qadata_get(ip);
-                if (!qa) {
-                        error = -ENOMEM;
-                        goto out_unlock;
-                }
-
                 error = gfs2_quota_lock_check(ip);
                 if (error)
-                        goto out_alloc_put;
+                        goto out_unlock;
 
 retry:
                 gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
@@ -835,7 +847,6 @@ retry:
                 offset += max_bytes;
                 gfs2_inplace_release(ip);
                 gfs2_quota_unlock(ip);
-                gfs2_qadata_put(ip);
         }
 
         if (error == 0)
@@ -846,8 +857,6 @@ out_trans_fail:
         gfs2_inplace_release(ip);
 out_qunlock:
         gfs2_quota_unlock(ip);
-out_alloc_put:
-        gfs2_qadata_put(ip);
 out_unlock:
         gfs2_glock_dq(&ip->i_gh);
 out_uninit:
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index dab2526071cc..1ed81f40da0d 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -46,10 +46,11 @@
 #include "trace_gfs2.h"
 
 struct gfs2_glock_iter {
-        int hash;                       /* hash bucket index         */
-        struct gfs2_sbd *sdp;           /* incore superblock         */
-        struct gfs2_glock *gl;          /* current glock struct      */
-        char string[512];               /* scratch space             */
+        int hash;                       /* hash bucket index           */
+        unsigned nhash;                 /* Index within current bucket */
+        struct gfs2_sbd *sdp;           /* incore superblock           */
+        struct gfs2_glock *gl;          /* current glock struct        */
+        loff_t last_pos;                /* last position               */
 };
 
 typedef void (*glock_examiner) (struct gfs2_glock * gl);
@@ -767,6 +768,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
         gl->gl_stats.stats[GFS2_LKS_DCOUNT] = 0;
         gl->gl_stats.stats[GFS2_LKS_QCOUNT] = 0;
         memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb));
+        memset(gl->gl_lvb, 0, 32 * sizeof(char));
         gl->gl_lksb.sb_lvbptr = gl->gl_lvb;
         gl->gl_tchange = jiffies;
         gl->gl_object = NULL;
@@ -948,9 +950,7 @@ void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...)
         va_start(args, fmt);
 
         if (seq) {
-                struct gfs2_glock_iter *gi = seq->private;
-                vsprintf(gi->string, fmt, args);
-                seq_printf(seq, gi->string);
+                seq_vprintf(seq, fmt, args);
         } else {
                 vaf.fmt = fmt;
                 vaf.va = &args;
@@ -1854,8 +1854,14 @@ static int gfs2_glock_iter_next(struct gfs2_glock_iter *gi)
                 gl = gi->gl;
                 if (gl) {
                         gi->gl = glock_hash_next(gl);
+                        gi->nhash++;
                 } else {
+                        if (gi->hash >= GFS2_GL_HASH_SIZE) {
+                                rcu_read_unlock();
+                                return 1;
+                        }
                         gi->gl = glock_hash_chain(gi->hash);
+                        gi->nhash = 0;
                 }
                 while (gi->gl == NULL) {
                         gi->hash++;
@@ -1864,6 +1870,7 @@ static int gfs2_glock_iter_next(struct gfs2_glock_iter *gi)
                                 return 1;
                         }
                         gi->gl = glock_hash_chain(gi->hash);
+                        gi->nhash = 0;
                 }
         /* Skip entries for other sb and dead entries */
         } while (gi->sdp != gi->gl->gl_sbd || atomic_read(&gi->gl->gl_ref) == 0);
@@ -1876,7 +1883,12 @@ static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
         struct gfs2_glock_iter *gi = seq->private;
         loff_t n = *pos;
 
-        gi->hash = 0;
+        if (gi->last_pos <= *pos)
+                n = gi->nhash + (*pos - gi->last_pos);
+        else
+                gi->hash = 0;
+
+        gi->nhash = 0;
         rcu_read_lock();
 
         do {
@@ -1884,6 +1896,7 @@ static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
                         return NULL;
         } while (n--);
 
+        gi->last_pos = *pos;
         return gi->gl;
 }
 
@@ -1893,7 +1906,7 @@ static void *gfs2_glock_seq_next(struct seq_file *seq, void *iter_ptr,
         struct gfs2_glock_iter *gi = seq->private;
 
         (*pos)++;
-
+        gi->last_pos = *pos;
         if (gfs2_glock_iter_next(gi))
                 return NULL;
 
@@ -1964,6 +1977,8 @@ static const struct seq_operations gfs2_sbstats_seq_ops = {
         .show  = gfs2_sbstats_seq_show,
 };
 
+#define GFS2_SEQ_GOODSIZE min(PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER, 65536UL)
+
 static int gfs2_glocks_open(struct inode *inode, struct file *file)
 {
         int ret = seq_open_private(file, &gfs2_glock_seq_ops,
@@ -1972,6 +1987,9 @@ static int gfs2_glocks_open(struct inode *inode, struct file *file)
                 struct seq_file *seq = file->private_data;
                 struct gfs2_glock_iter *gi = seq->private;
                 gi->sdp = inode->i_private;
+                seq->buf = kmalloc(GFS2_SEQ_GOODSIZE, GFP_KERNEL | __GFP_NOWARN);
+                if (seq->buf)
+                        seq->size = GFS2_SEQ_GOODSIZE;
         }
         return ret;
 }
@@ -1984,6 +2002,9 @@ static int gfs2_glstats_open(struct inode *inode, struct file *file)
                 struct seq_file *seq = file->private_data;
                 struct gfs2_glock_iter *gi = seq->private;
                 gi->sdp = inode->i_private;
+                seq->buf = kmalloc(GFS2_SEQ_GOODSIZE, GFP_KERNEL | __GFP_NOWARN);
+                if (seq->buf)
+                        seq->size = GFS2_SEQ_GOODSIZE;
         }
         return ret;
 }
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 67fd6beffece..aaecc8085fc5 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -84,17 +84,22 @@ struct gfs2_rgrpd {
         u32 rd_data;                    /* num of data blocks in rgrp */
         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
         u32 rd_free;
+        u32 rd_reserved;                /* number of blocks reserved */
         u32 rd_free_clone;
         u32 rd_dinodes;
         u64 rd_igeneration;
         struct gfs2_bitmap *rd_bits;
         struct gfs2_sbd *rd_sbd;
+        struct gfs2_rgrp_lvb *rd_rgl;
         u32 rd_last_alloc;
         u32 rd_flags;
 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
+        spinlock_t rd_rsspin;           /* protects reservation related vars */
+        struct rb_root rd_rstree;       /* multi-block reservation tree */
+        u32 rd_rs_cnt;                  /* count of current reservations */
 };
 
 enum gfs2_state_bits {
@@ -232,6 +237,38 @@ struct gfs2_holder {
         unsigned long gh_ip;
 };
 
+/* Resource group multi-block reservation, in order of appearance:
+
+   Step 1. Function prepares to write, allocates a mb, sets the size hint.
+   Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
+   Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
+   Step 4. Bits are assigned from the rgrp based on either the reservation
+           or wherever it can.
+*/
+
+struct gfs2_blkreserv {
+        /* components used during write (step 1): */
+        atomic_t rs_sizehint;         /* hint of the write size */
+
+        /* components used during inplace_reserve (step 2): */
+        u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
+
+        /* components used during get_local_rgrp (step 3): */
+        struct gfs2_rgrpd *rs_rgd;    /* pointer to the gfs2_rgrpd */
+        struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
+        struct rb_node rs_node;       /* link to other block reservations */
+
+        /* components used during block searches and assignments (step 4): */
+        struct gfs2_bitmap *rs_bi;    /* bitmap for the current allocation */
+        u32 rs_biblk;                 /* start block relative to the bi */
+        u32 rs_free;                  /* how many blocks are still free */
+
+        /* ancillary quota stuff */
+        struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
+        struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
+        unsigned int rs_qa_qd_num;
+};
+
 enum {
         GLF_LOCK                        = 1,
         GLF_DEMOTE                      = 3,
@@ -289,18 +326,6 @@ struct gfs2_glock {
 
 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 
-struct gfs2_qadata { /* quota allocation data */
-        /* Quota stuff */
-        struct gfs2_quota_data *qa_qd[2*MAXQUOTAS];
-        struct gfs2_holder qa_qd_ghs[2*MAXQUOTAS];
-        unsigned int qa_qd_num;
-};
-
-struct gfs2_blkreserv {
-        u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
-        struct gfs2_holder rs_rgd_gh; /* Filled in by gfs2_inplace_reserve() */
-};
-
 enum {
         GIF_INVALID             = 0,
         GIF_QD_LOCKED           = 1,
@@ -308,7 +333,6 @@ enum {
         GIF_SW_PAGED            = 3,
 };
 
-
 struct gfs2_inode {
         struct inode i_inode;
         u64 i_no_addr;
@@ -319,8 +343,7 @@ struct gfs2_inode {
         struct gfs2_glock *i_gl; /* Move into i_gh? */
         struct gfs2_holder i_iopen_gh;
         struct gfs2_holder i_gh; /* for prepare/commit_write only */
-        struct gfs2_qadata *i_qadata; /* quota allocation data */
-        struct gfs2_blkreserv *i_res; /* resource group block reservation */
+        struct gfs2_blkreserv *i_res; /* rgrp multi-block reservation */
         struct gfs2_rgrpd *i_rgd;
         u64 i_goal;     /* goal block for allocations */
         struct rw_semaphore i_rw_mutex;
@@ -473,6 +496,7 @@ struct gfs2_args {
         unsigned int ar_discard:1;              /* discard requests */
         unsigned int ar_errors:2;               /* errors=withdraw | panic */
         unsigned int ar_nobarrier:1;            /* do not send barriers */
+        unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
         int ar_commit;                          /* Commit interval */
         int ar_statfs_quantum;                  /* The fast statfs interval */
         int ar_quota_quantum;                   /* The quota interval */
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 867674785fcf..4ce22e547308 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -521,12 +521,13 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
         int error;
 
         munge_mode_uid_gid(dip, &mode, &uid, &gid);
-        if (!gfs2_qadata_get(dip))
-                return -ENOMEM;
+        error = gfs2_rindex_update(sdp);
+        if (error)
+                return error;
 
         error = gfs2_quota_lock(dip, uid, gid);
         if (error)
-                goto out;
+                return error;
 
         error = gfs2_quota_check(dip, uid, gid);
         if (error)
@@ -542,8 +543,6 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 
 out_quota:
         gfs2_quota_unlock(dip);
-out:
-        gfs2_qadata_put(dip);
         return error;
 }
 
@@ -551,14 +550,13 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
                        struct gfs2_inode *ip)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
-        struct gfs2_qadata *qa;
         int alloc_required;
         struct buffer_head *dibh;
         int error;
 
-        qa = gfs2_qadata_get(dip);
-        if (!qa)
-                return -ENOMEM;
+        error = gfs2_rindex_update(sdp);
+        if (error)
+                return error;
 
         error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
@@ -605,13 +603,13 @@ fail_end_trans:
         gfs2_trans_end(sdp);
 
 fail_ipreserv:
-        gfs2_inplace_release(dip);
+        if (alloc_required)
+                gfs2_inplace_release(dip);
 
 fail_quota_locks:
         gfs2_quota_unlock(dip);
 
 fail:
-        gfs2_qadata_put(dip);
         return error;
 }
 
@@ -657,7 +655,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
         const struct qstr *name = &dentry->d_name;
         struct gfs2_holder ghs[2];
         struct inode *inode = NULL;
-        struct gfs2_inode *dip = GFS2_I(dir);
+        struct gfs2_inode *dip = GFS2_I(dir), *ip;
         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
         struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
         int error;
@@ -667,6 +665,15 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
         if (!name->len || name->len > GFS2_FNAMESIZE)
                 return -ENAMETOOLONG;
 
+        /* We need a reservation to allocate the new dinode block. The
+           directory ip temporarily points to the reservation, but this is
+           being done to get a set of contiguous blocks for the new dinode.
+           Since this is a create, we don't have a sizehint yet, so it will
+           have to use the minimum reservation size. */
+        error = gfs2_rs_alloc(dip);
+        if (error)
+                return error;
+
         error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
         if (error)
                 goto fail;
@@ -700,19 +707,29 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto fail_gunlock2;
 
-        error = gfs2_inode_refresh(GFS2_I(inode));
+        ip = GFS2_I(inode);
+        error = gfs2_inode_refresh(ip);
         if (error)
                 goto fail_gunlock2;
 
+        /* The newly created inode needs a reservation so it can allocate
+           xattrs. At the same time, we want new blocks allocated to the new
+           dinode to be as contiguous as possible. Since we allocated the
+           dinode block under the directory's reservation, we transfer
+           ownership of that reservation to the new inode. The directory
+           doesn't need a reservation unless it needs a new allocation. */
+        ip->i_res = dip->i_res;
+        dip->i_res = NULL;
+
         error = gfs2_acl_create(dip, inode);
         if (error)
                 goto fail_gunlock2;
 
-        error = gfs2_security_init(dip, GFS2_I(inode), name);
+        error = gfs2_security_init(dip, ip, name);
         if (error)
                 goto fail_gunlock2;
 
-        error = link_dinode(dip, name, GFS2_I(inode));
+        error = link_dinode(dip, name, ip);
         if (error)
                 goto fail_gunlock2;
 
@@ -722,10 +739,9 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
         gfs2_trans_end(sdp);
         /* Check if we reserved space in the rgrp. Function link_dinode may
            not, depending on whether alloc is required. */
-        if (dip->i_res)
+        if (gfs2_mb_reserved(dip))
                 gfs2_inplace_release(dip);
         gfs2_quota_unlock(dip);
-        gfs2_qadata_put(dip);
         mark_inode_dirty(inode);
         gfs2_glock_dq_uninit_m(2, ghs);
         d_instantiate(dentry, inode);
@@ -740,6 +756,7 @@ fail_gunlock:
                 iput(inode);
         }
 fail:
+        gfs2_rs_delete(dip);
         if (bh)
                 brelse(bh);
         return error;
@@ -816,6 +833,10 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
         if (S_ISDIR(inode->i_mode))
                 return -EPERM;
 
+        error = gfs2_rs_alloc(dip);
+        if (error)
+                return error;
+
         gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
         gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
 
@@ -867,16 +888,9 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
         error = 0;
 
         if (alloc_required) {
-                struct gfs2_qadata *qa = gfs2_qadata_get(dip);
-
-                if (!qa) {
-                        error = -ENOMEM;
-                        goto out_gunlock;
-                }
-
                 error = gfs2_quota_lock_check(dip);
                 if (error)
-                        goto out_alloc;
+                        goto out_gunlock;
 
                 error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres);
                 if (error)
@@ -919,9 +933,6 @@ out_ipres:
 out_gunlock_q:
         if (alloc_required)
                 gfs2_quota_unlock(dip);
-out_alloc:
-        if (alloc_required)
-                gfs2_qadata_put(dip);
 out_gunlock:
         gfs2_glock_dq(ghs + 1);
 out_child:
@@ -1231,6 +1242,10 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
         if (error)
                 return error;
 
+        error = gfs2_rs_alloc(ndip);
+        if (error)
+                return error;
+
         if (odip != ndip) {
                 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
                                            0, &r_gh);
@@ -1354,16 +1369,9 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                 goto out_gunlock;
 
         if (alloc_required) {
-                struct gfs2_qadata *qa = gfs2_qadata_get(ndip);
-
-                if (!qa) {
-                        error = -ENOMEM;
-                        goto out_gunlock;
-                }
-
                 error = gfs2_quota_lock_check(ndip);
                 if (error)
-                        goto out_alloc;
+                        goto out_gunlock;
 
                 error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres);
                 if (error)
@@ -1424,9 +1432,6 @@ out_ipreserv:
 out_gunlock_q:
         if (alloc_required)
                 gfs2_quota_unlock(ndip);
-out_alloc:
-        if (alloc_required)
-                gfs2_qadata_put(ndip);
 out_gunlock:
         while (x--) {
                 gfs2_glock_dq(ghs + x);
@@ -1587,12 +1592,9 @@ static int setattr_chown(struct inode *inode, struct iattr *attr)
         if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
                 ogid = ngid = NO_QUOTA_CHANGE;
 
-        if (!gfs2_qadata_get(ip))
-                return -ENOMEM;
-
         error = gfs2_quota_lock(ip, nuid, ngid);
         if (error)
-                goto out_alloc;
+                return error;
 
         if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
                 error = gfs2_quota_check(ip, nuid, ngid);
@@ -1618,8 +1620,6 @@ out_end_trans:
         gfs2_trans_end(sdp);
 out_gunlock_q:
         gfs2_quota_unlock(ip);
-out_alloc:
-        gfs2_qadata_put(ip);
         return error;
 }
 
@@ -1641,6 +1641,10 @@ static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
         struct gfs2_holder i_gh;
         int error;
 
+        error = gfs2_rs_alloc(ip);
+        if (error)
+                return error;
+
         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
         if (error)
                 return error;
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 852c1be1dd3b..8ff95a2d54ee 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -401,9 +401,14 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
                 goto out;
         set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
         set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
-        gfs2_meta_check(sdp, bd->bd_bh);
-        gfs2_pin(sdp, bd->bd_bh);
         mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
+        if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
+                printk(KERN_ERR
+                       "Attempting to add uninitialised block to journal (inplace block=%lld)\n",
+                       (unsigned long long)bd->bd_bh->b_blocknr);
+                BUG();
+        }
+        gfs2_pin(sdp, bd->bd_bh);
         mh->__pad0 = cpu_to_be64(0);
         mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
         sdp->sd_log_num_buf++;
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 6cdb0f2a1b09..e04d0e09ee7b 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -43,7 +43,6 @@ static void gfs2_init_inode_once(void *foo)
         inode_init_once(&ip->i_inode);
         init_rwsem(&ip->i_rw_mutex);
         INIT_LIST_HEAD(&ip->i_trunc_list);
-        ip->i_qadata = NULL;
         ip->i_res = NULL;
         ip->i_hash_cache = NULL;
 }
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 6c1e5d1c404a..3a56c8d94de0 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -213,8 +213,10 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
         struct gfs2_sbd *sdp = gl->gl_sbd;
         struct buffer_head *bh;
 
-        if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+        if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) {
+                *bhp = NULL;
                 return -EIO;
+        }
 
         *bhp = bh = gfs2_getbuf(gl, blkno, CREATE);
 
@@ -235,6 +237,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
                 if (tr && tr->tr_touched)
                         gfs2_io_error_bh(sdp, bh);
                 brelse(bh);
+                *bhp = NULL;
                 return -EIO;
         }
 
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 6c906078f657..e5af9dc420ef 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1118,20 +1118,33 @@ static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent
         }
 
         error = init_names(sdp, silent);
-        if (error)
-                goto fail;
+        if (error) {
+                /* In this case, we haven't initialized sysfs, so we have to
+                   manually free the sdp. */
+                free_percpu(sdp->sd_lkstats);
+                kfree(sdp);
+                sb->s_fs_info = NULL;
+                return error;
+        }
 
         snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s", sdp->sd_table_name);
 
-        gfs2_create_debugfs_file(sdp);
-
         error = gfs2_sys_fs_add(sdp);
+        /*
+         * If we hit an error here, gfs2_sys_fs_add will have called function
+         * kobject_put which causes the sysfs usage count to go to zero, which
+         * causes sysfs to call function gfs2_sbd_release, which frees sdp.
+         * Subsequent error paths here will call gfs2_sys_fs_del, which also
+         * kobject_put to free sdp.
+         */
         if (error)
-                goto fail;
+                return error;
+
+        gfs2_create_debugfs_file(sdp);
 
         error = gfs2_lm_mount(sdp, silent);
         if (error)
-                goto fail_sys;
+                goto fail_debug;
 
         error = init_locking(sdp, &mount_gh, DO);
         if (error)
@@ -1215,12 +1228,12 @@ fail_locking:
 fail_lm:
         gfs2_gl_hash_clear(sdp);
         gfs2_lm_unmount(sdp);
-fail_sys:
-        gfs2_sys_fs_del(sdp);
-fail:
+fail_debug:
         gfs2_delete_debugfs_file(sdp);
         free_percpu(sdp->sd_lkstats);
-        kfree(sdp);
+        /* gfs2_sys_fs_del must be the last thing we do, since it causes
+         * sysfs to call function gfs2_sbd_release, which frees sdp. */
+        gfs2_sys_fs_del(sdp);
         sb->s_fs_info = NULL;
         return error;
 }
@@ -1389,10 +1402,9 @@ static void gfs2_kill_sb(struct super_block *sb)
         sdp->sd_root_dir = NULL;
         sdp->sd_master_dir = NULL;
         shrink_dcache_sb(sb);
-        kill_block_super(sb);
         gfs2_delete_debugfs_file(sdp);
         free_percpu(sdp->sd_lkstats);
-        kfree(sdp);
+        kill_block_super(sb);
 }
 
 struct file_system_type gfs2_fs_type = {
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 27b5cc7d6881..a3bde91645c2 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -494,11 +494,15 @@ static void qdsb_put(struct gfs2_quota_data *qd)
 int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_qadata *qa = ip->i_qadata;
-        struct gfs2_quota_data **qd = qa->qa_qd;
+        struct gfs2_quota_data **qd;
         int error;
 
-        if (gfs2_assert_warn(sdp, !qa->qa_qd_num) ||
+        if (ip->i_res == NULL)
+                gfs2_rs_alloc(ip);
+
+        qd = ip->i_res->rs_qa_qd;
+
+        if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
             gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
                 return -EIO;
 
@@ -508,20 +512,20 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
         error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd);
         if (error)
                 goto out;
-        qa->qa_qd_num++;
+        ip->i_res->rs_qa_qd_num++;
         qd++;
 
         error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd);
         if (error)
                 goto out;
-        qa->qa_qd_num++;
+        ip->i_res->rs_qa_qd_num++;
         qd++;
 
         if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) {
                 error = qdsb_get(sdp, QUOTA_USER, uid, qd);
                 if (error)
                         goto out;
-                qa->qa_qd_num++;
+                ip->i_res->rs_qa_qd_num++;
                 qd++;
         }
 
@@ -529,7 +533,7 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
                 error = qdsb_get(sdp, QUOTA_GROUP, gid, qd);
                 if (error)
                         goto out;
-                qa->qa_qd_num++;
+                ip->i_res->rs_qa_qd_num++;
                 qd++;
         }
 
@@ -542,16 +546,17 @@ out:
 void gfs2_quota_unhold(struct gfs2_inode *ip)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_qadata *qa = ip->i_qadata;
         unsigned int x;
 
+        if (ip->i_res == NULL)
+                return;
         gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
 
-        for (x = 0; x < qa->qa_qd_num; x++) {
-                qdsb_put(qa->qa_qd[x]);
-                qa->qa_qd[x] = NULL;
+        for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
+                qdsb_put(ip->i_res->rs_qa_qd[x]);
+                ip->i_res->rs_qa_qd[x] = NULL;
         }
-        qa->qa_qd_num = 0;
+        ip->i_res->rs_qa_qd_num = 0;
 }
 
 static int sort_qd(const void *a, const void *b)
@@ -764,6 +769,10 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
         unsigned int nalloc = 0, blocks;
         int error;
 
+        error = gfs2_rs_alloc(ip);
+        if (error)
+                return error;
+
         gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
                               &data_blocks, &ind_blocks);
 
@@ -915,7 +924,6 @@ fail:
 int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_qadata *qa = ip->i_qadata;
         struct gfs2_quota_data *qd;
         unsigned int x;
         int error = 0;
@@ -928,15 +936,15 @@ int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
             sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
                 return 0;
 
-        sort(qa->qa_qd, qa->qa_qd_num, sizeof(struct gfs2_quota_data *),
-             sort_qd, NULL);
+        sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
+             sizeof(struct gfs2_quota_data *), sort_qd, NULL);
 
-        for (x = 0; x < qa->qa_qd_num; x++) {
+        for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
                 int force = NO_FORCE;
-                qd = qa->qa_qd[x];
+                qd = ip->i_res->rs_qa_qd[x];
                 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
                         force = FORCE;
-                error = do_glock(qd, force, &qa->qa_qd_ghs[x]);
+                error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
                 if (error)
                         break;
         }
@@ -945,7 +953,7 @@ int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
                 set_bit(GIF_QD_LOCKED, &ip->i_flags);
         else {
                 while (x--)
-                        gfs2_glock_dq_uninit(&qa->qa_qd_ghs[x]);
+                        gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
                 gfs2_quota_unhold(ip);
         }
 
@@ -990,7 +998,6 @@ static int need_sync(struct gfs2_quota_data *qd)
 
 void gfs2_quota_unlock(struct gfs2_inode *ip)
 {
-        struct gfs2_qadata *qa = ip->i_qadata;
         struct gfs2_quota_data *qda[4];
         unsigned int count = 0;
         unsigned int x;
@@ -998,14 +1005,14 @@ void gfs2_quota_unlock(struct gfs2_inode *ip)
         if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
                 goto out;
 
-        for (x = 0; x < qa->qa_qd_num; x++) {
+        for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
                 struct gfs2_quota_data *qd;
                 int sync;
 
-                qd = qa->qa_qd[x];
+                qd = ip->i_res->rs_qa_qd[x];
                 sync = need_sync(qd);
 
-                gfs2_glock_dq_uninit(&qa->qa_qd_ghs[x]);
+                gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
 
                 if (sync && qd_trylock(qd))
                         qda[count++] = qd;
@@ -1038,7 +1045,6 @@ static int print_message(struct gfs2_quota_data *qd, char *type)
 int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_qadata *qa = ip->i_qadata;
         struct gfs2_quota_data *qd;
         s64 value;
         unsigned int x;
@@ -1050,8 +1056,8 @@ int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
         if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
                 return 0;
 
-        for (x = 0; x < qa->qa_qd_num; x++) {
-                qd = qa->qa_qd[x];
+        for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
+                qd = ip->i_res->rs_qa_qd[x];
 
                 if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) ||
                       (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))))
@@ -1089,7 +1095,6 @@ int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
                        u32 uid, u32 gid)
 {
-        struct gfs2_qadata *qa = ip->i_qadata;
         struct gfs2_quota_data *qd;
         unsigned int x;
 
@@ -1098,8 +1103,8 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
         if (ip->i_diskflags & GFS2_DIF_SYSTEM)
                 return;
 
-        for (x = 0; x < qa->qa_qd_num; x++) {
-                qd = qa->qa_qd[x];
+        for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
+                qd = ip->i_res->rs_qa_qd[x];
 
                 if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) ||
                     (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) {
@@ -1549,10 +1554,14 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
         if (error)
                 return error;
 
+        error = gfs2_rs_alloc(ip);
+        if (error)
+                goto out_put;
+
         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;
+                goto out_unlockput;
         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
         if (error)
                 goto out_q;
@@ -1609,8 +1618,9 @@ out_i:
         gfs2_glock_dq_uninit(&i_gh);
 out_q:
         gfs2_glock_dq_uninit(&q_gh);
-out_put:
+out_unlockput:
         mutex_unlock(&ip->i_inode.i_mutex);
+out_put:
         qd_put(qd);
         return error;
 }
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index f74fb9bd1973..4d34887a601d 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -35,6 +35,9 @@
 #define BFITNOENT ((u32)~0)
 #define NO_BLOCK ((u64)~0)
 
+#define RSRV_CONTENTION_FACTOR 4
+#define RGRP_RSRV_MAX_CONTENDERS 2
+
 #if BITS_PER_LONG == 32
 #define LBITMASK   (0x55555555UL)
 #define LBITSKIP55 (0x55555555UL)
@@ -178,6 +181,57 @@ static inline u64 gfs2_bit_search(const __le64 *ptr, u64 mask, u8 state)
 }
 
 /**
+ * rs_cmp - multi-block reservation range compare
+ * @blk: absolute file system block number of the new reservation
+ * @len: number of blocks in the new reservation
+ * @rs: existing reservation to compare against
+ *
+ * returns: 1 if the block range is beyond the reach of the reservation
+ *         -1 if the block range is before the start of the reservation
+ *          0 if the block range overlaps with the reservation
+ */
+static inline int rs_cmp(u64 blk, u32 len, struct gfs2_blkreserv *rs)
+{
+        u64 startblk = gfs2_rs_startblk(rs);
+
+        if (blk >= startblk + rs->rs_free)
+                return 1;
+        if (blk + len - 1 < startblk)
+                return -1;
+        return 0;
+}
+
+/**
+ * rs_find - Find a rgrp multi-block reservation that contains a given block
+ * @rgd: The rgrp
+ * @rgblk: The block we're looking for, relative to the rgrp
+ */
+static struct gfs2_blkreserv *rs_find(struct gfs2_rgrpd *rgd, u32 rgblk)
+{
+        struct rb_node **newn;
+        int rc;
+        u64 fsblk = rgblk + rgd->rd_data0;
+
+        spin_lock(&rgd->rd_rsspin);
+        newn = &rgd->rd_rstree.rb_node;
+        while (*newn) {
+                struct gfs2_blkreserv *cur =
+                        rb_entry(*newn, struct gfs2_blkreserv, rs_node);
+                rc = rs_cmp(fsblk, 1, cur);
+                if (rc < 0)
+                        newn = &((*newn)->rb_left);
+                else if (rc > 0)
+                        newn = &((*newn)->rb_right);
+                else {
+                        spin_unlock(&rgd->rd_rsspin);
+                        return cur;
+                }
+        }
+        spin_unlock(&rgd->rd_rsspin);
+        return NULL;
+}
+
+/**
  * gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing
  *       a block in a given allocation state.
  * @buf: the buffer that holds the bitmaps
@@ -417,6 +471,137 @@ void gfs2_free_clones(struct gfs2_rgrpd *rgd)
         }
 }
 
+/**
+ * gfs2_rs_alloc - make sure we have a reservation assigned to the inode
+ * @ip: the inode for this reservation
+ */
+int gfs2_rs_alloc(struct gfs2_inode *ip)
+{
+        int error = 0;
+        struct gfs2_blkreserv *res;
+
+        if (ip->i_res)
+                return 0;
+
+        res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS);
+        if (!res)
+                error = -ENOMEM;
+
+        down_write(&ip->i_rw_mutex);
+        if (ip->i_res)
+                kmem_cache_free(gfs2_rsrv_cachep, res);
+        else
+                ip->i_res = res;
+        up_write(&ip->i_rw_mutex);
+        return error;
+}
+
+static void dump_rs(struct seq_file *seq, struct gfs2_blkreserv *rs)
+{
+        gfs2_print_dbg(seq, "  r: %llu s:%llu b:%u f:%u\n",
+                       rs->rs_rgd->rd_addr, gfs2_rs_startblk(rs), rs->rs_biblk,
+                       rs->rs_free);
+}
+
+/**
+ * __rs_deltree - remove a multi-block reservation from the rgd tree
+ * @rs: The reservation to remove
+ *
+ */
+static void __rs_deltree(struct gfs2_blkreserv *rs)
+{
+        struct gfs2_rgrpd *rgd;
+
+        if (!gfs2_rs_active(rs))
+                return;
+
+        rgd = rs->rs_rgd;
+        /* We can't do this: The reason is that when the rgrp is invalidated,
+           it's in the "middle" of acquiring the glock, but the HOLDER bit
+           isn't set yet:
+           BUG_ON(!gfs2_glock_is_locked_by_me(rs->rs_rgd->rd_gl));*/
+        trace_gfs2_rs(NULL, rs, TRACE_RS_TREEDEL);
+
+        if (!RB_EMPTY_ROOT(&rgd->rd_rstree))
+                rb_erase(&rs->rs_node, &rgd->rd_rstree);
+        BUG_ON(!rgd->rd_rs_cnt);
+        rgd->rd_rs_cnt--;
+
+        if (rs->rs_free) {
+                /* return reserved blocks to the rgrp and the ip */
+                BUG_ON(rs->rs_rgd->rd_reserved < rs->rs_free);
+                rs->rs_rgd->rd_reserved -= rs->rs_free;
+                rs->rs_free = 0;
+                clear_bit(GBF_FULL, &rs->rs_bi->bi_flags);
+                smp_mb__after_clear_bit();
+        }
+        /* We can't change any of the step 1 or step 2 components of the rs.
+           E.g. We can't set rs_rgd to NULL because the rgd glock is held and
+           dequeued through this pointer.
+           Can't: atomic_set(&rs->rs_sizehint, 0);
+           Can't: rs->rs_requested = 0;
+           Can't: rs->rs_rgd = NULL;*/
+        rs->rs_bi = NULL;
+        rs->rs_biblk = 0;
+}
+
+/**
+ * gfs2_rs_deltree - remove a multi-block reservation from the rgd tree
+ * @rs: The reservation to remove
+ *
+ */
+void gfs2_rs_deltree(struct gfs2_blkreserv *rs)
+{
+        struct gfs2_rgrpd *rgd;
+
+        if (!gfs2_rs_active(rs))
+                return;
+
+        rgd = rs->rs_rgd;
+        spin_lock(&rgd->rd_rsspin);
+        __rs_deltree(rs);
+        spin_unlock(&rgd->rd_rsspin);
+}
+
+/**
+ * gfs2_rs_delete - delete a multi-block reservation
+ * @ip: The inode for this reservation
+ *
+ */
+void gfs2_rs_delete(struct gfs2_inode *ip)
+{
+        down_write(&ip->i_rw_mutex);
+        if (ip->i_res) {
+                gfs2_rs_deltree(ip->i_res);
+                trace_gfs2_rs(ip, ip->i_res, TRACE_RS_DELETE);
+                BUG_ON(ip->i_res->rs_free);
+                kmem_cache_free(gfs2_rsrv_cachep, ip->i_res);
+                ip->i_res = NULL;
+        }
+        up_write(&ip->i_rw_mutex);
+}
+
+/**
+ * return_all_reservations - return all reserved blocks back to the rgrp.
+ * @rgd: the rgrp that needs its space back
+ *
+ * We previously reserved a bunch of blocks for allocation. Now we need to
+ * give them back. This leave the reservation structures in tact, but removes
+ * all of their corresponding "no-fly zones".
+ */
+static void return_all_reservations(struct gfs2_rgrpd *rgd)
+{
+        struct rb_node *n;
+        struct gfs2_blkreserv *rs;
+
+        spin_lock(&rgd->rd_rsspin);
+        while ((n = rb_first(&rgd->rd_rstree))) {
+                rs = rb_entry(n, struct gfs2_blkreserv, rs_node);
+                __rs_deltree(rs);
+        }
+        spin_unlock(&rgd->rd_rsspin);
+}
+
 void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
 {
         struct rb_node *n;
@@ -439,6 +624,7 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
 
                 gfs2_free_clones(rgd);
                 kfree(rgd->rd_bits);
+                return_all_reservations(rgd);
                 kmem_cache_free(gfs2_rgrpd_cachep, rgd);
         }
 }
@@ -616,6 +802,7 @@ static int read_rindex_entry(struct gfs2_inode *ip)
         rgd->rd_data0 = be64_to_cpu(buf.ri_data0);
         rgd->rd_data = be32_to_cpu(buf.ri_data);
         rgd->rd_bitbytes = be32_to_cpu(buf.ri_bitbytes);
+        spin_lock_init(&rgd->rd_rsspin);
 
         error = compute_bitstructs(rgd);
         if (error)
@@ -627,6 +814,7 @@ static int read_rindex_entry(struct gfs2_inode *ip)
                 goto fail;
 
         rgd->rd_gl->gl_object = rgd;
+        rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lvb;
         rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
         if (rgd->rd_data > sdp->sd_max_rg_data)
                 sdp->sd_max_rg_data = rgd->rd_data;
@@ -736,9 +924,65 @@ static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf)
         memset(&str->rg_reserved, 0, sizeof(str->rg_reserved));
 }
 
+static int gfs2_rgrp_lvb_valid(struct gfs2_rgrpd *rgd)
+{
+        struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl;
+        struct gfs2_rgrp *str = (struct gfs2_rgrp *)rgd->rd_bits[0].bi_bh->b_data;
+
+        if (rgl->rl_flags != str->rg_flags || rgl->rl_free != str->rg_free ||
+            rgl->rl_dinodes != str->rg_dinodes ||
+            rgl->rl_igeneration != str->rg_igeneration)
+                return 0;
+        return 1;
+}
+
+static void gfs2_rgrp_ondisk2lvb(struct gfs2_rgrp_lvb *rgl, const void *buf)
+{
+        const struct gfs2_rgrp *str = buf;
+
+        rgl->rl_magic = cpu_to_be32(GFS2_MAGIC);
+        rgl->rl_flags = str->rg_flags;
+        rgl->rl_free = str->rg_free;
+        rgl->rl_dinodes = str->rg_dinodes;
+        rgl->rl_igeneration = str->rg_igeneration;
+        rgl->__pad = 0UL;
+}
+
+static void update_rgrp_lvb_unlinked(struct gfs2_rgrpd *rgd, u32 change)
+{
+        struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl;
+        u32 unlinked = be32_to_cpu(rgl->rl_unlinked) + change;
+        rgl->rl_unlinked = cpu_to_be32(unlinked);
+}
+
+static u32 count_unlinked(struct gfs2_rgrpd *rgd)
+{
+        struct gfs2_bitmap *bi;
+        const u32 length = rgd->rd_length;
+        const u8 *buffer = NULL;
+        u32 i, goal, count = 0;
+
+        for (i = 0, bi = rgd->rd_bits; i < length; i++, bi++) {
+                goal = 0;
+                buffer = bi->bi_bh->b_data + bi->bi_offset;
+                WARN_ON(!buffer_uptodate(bi->bi_bh));
+                while (goal < bi->bi_len * GFS2_NBBY) {
+                        goal = gfs2_bitfit(buffer, bi->bi_len, goal,
+                                           GFS2_BLKST_UNLINKED);
+                        if (goal == BFITNOENT)
+                                break;
+                        count++;
+                        goal++;
+                }
+        }
+
+        return count;
+}
+
+
 /**
- * gfs2_rgrp_go_lock - Read in a RG's header and bitmaps
- * @gh: The glock holder for the resource group
+ * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps
+ * @rgd: the struct gfs2_rgrpd describing the RG to read in
  *
  * Read in all of a Resource Group's header and bitmap blocks.
  * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps.
@@ -746,9 +990,8 @@ static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf)
  * Returns: errno
  */
 
-int gfs2_rgrp_go_lock(struct gfs2_holder *gh)
+int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
 {
-        struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object;
         struct gfs2_sbd *sdp = rgd->rd_sbd;
         struct gfs2_glock *gl = rgd->rd_gl;
         unsigned int length = rgd->rd_length;
@@ -756,6 +999,9 @@ int gfs2_rgrp_go_lock(struct gfs2_holder *gh)
         unsigned int x, y;
         int error;
 
+        if (rgd->rd_bits[0].bi_bh != NULL)
+                return 0;
+
         for (x = 0; x < length; x++) {
                 bi = rgd->rd_bits + x;
                 error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh);
@@ -782,7 +1028,20 @@ int gfs2_rgrp_go_lock(struct gfs2_holder *gh)
                 rgd->rd_flags |= (GFS2_RDF_UPTODATE | GFS2_RDF_CHECK);
                 rgd->rd_free_clone = rgd->rd_free;
         }
-
+        if (be32_to_cpu(GFS2_MAGIC) != rgd->rd_rgl->rl_magic) {
+                rgd->rd_rgl->rl_unlinked = cpu_to_be32(count_unlinked(rgd));
+                gfs2_rgrp_ondisk2lvb(rgd->rd_rgl,
+                                     rgd->rd_bits[0].bi_bh->b_data);
+        }
+        else if (sdp->sd_args.ar_rgrplvb) {
+                if (!gfs2_rgrp_lvb_valid(rgd)){
+                        gfs2_consist_rgrpd(rgd);
+                        error = -EIO;
+                        goto fail;
+                }
+                if (rgd->rd_rgl->rl_unlinked == 0)
+                        rgd->rd_flags &= ~GFS2_RDF_CHECK;
+        }
         return 0;
 
 fail:
@@ -796,6 +1055,39 @@ fail:
         return error;
 }
 
+int update_rgrp_lvb(struct gfs2_rgrpd *rgd)
+{
+        u32 rl_flags;
+
+        if (rgd->rd_flags & GFS2_RDF_UPTODATE)
+                return 0;
+
+        if (be32_to_cpu(GFS2_MAGIC) != rgd->rd_rgl->rl_magic)
+                return gfs2_rgrp_bh_get(rgd);
+
+        rl_flags = be32_to_cpu(rgd->rd_rgl->rl_flags);
+        rl_flags &= ~GFS2_RDF_MASK;
+        rgd->rd_flags &= GFS2_RDF_MASK;
+        rgd->rd_flags |= (rl_flags | GFS2_RDF_UPTODATE | GFS2_RDF_CHECK);
+        if (rgd->rd_rgl->rl_unlinked == 0)
+                rgd->rd_flags &= ~GFS2_RDF_CHECK;
+        rgd->rd_free = be32_to_cpu(rgd->rd_rgl->rl_free);
+        rgd->rd_free_clone = rgd->rd_free;
+        rgd->rd_dinodes = be32_to_cpu(rgd->rd_rgl->rl_dinodes);
+        rgd->rd_igeneration = be64_to_cpu(rgd->rd_rgl->rl_igeneration);
+        return 0;
+}
+
+int gfs2_rgrp_go_lock(struct gfs2_holder *gh)
+{
+        struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object;
+        struct gfs2_sbd *sdp = rgd->rd_sbd;
+
+        if (gh->gh_flags & GL_SKIP && sdp->sd_args.ar_rgrplvb)
+                return 0;
+        return gfs2_rgrp_bh_get((struct gfs2_rgrpd *)gh->gh_gl->gl_object);
+}
+
 /**
  * gfs2_rgrp_go_unlock - Release RG bitmaps read in with gfs2_rgrp_bh_get()
  * @gh: The glock holder for the resource group
@@ -809,8 +1101,10 @@ void gfs2_rgrp_go_unlock(struct gfs2_holder *gh)
 
         for (x = 0; x < length; x++) {
                 struct gfs2_bitmap *bi = rgd->rd_bits + x;
-                brelse(bi->bi_bh);
-                bi->bi_bh = NULL;
+                if (bi->bi_bh) {
+                        brelse(bi->bi_bh);
+                        bi->bi_bh = NULL;
+                }
         }
 
 }
@@ -954,6 +1248,7 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
                                 rgd->rd_flags |= GFS2_RGF_TRIMMED;
                                 gfs2_trans_add_bh(rgd->rd_gl, bh, 1);
                                 gfs2_rgrp_out(rgd, bh->b_data);
+                                gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, bh->b_data);
                                 gfs2_trans_end(sdp);
                         }
                 }
@@ -974,38 +1269,184 @@ out:
 }
 
 /**
- * gfs2_qadata_get - get the struct gfs2_qadata structure for an inode
- * @ip: the incore GFS2 inode structure
+ * rs_insert - insert a new multi-block reservation into the rgrp's rb_tree
+ * @bi: the bitmap with the blocks
+ * @ip: the inode structure
+ * @biblk: the 32-bit block number relative to the start of the bitmap
+ * @amount: the number of blocks to reserve
  *
- * Returns: the struct gfs2_qadata
+ * Returns: NULL - reservation was already taken, so not inserted
+ *          pointer to the inserted reservation
  */
+static struct gfs2_blkreserv *rs_insert(struct gfs2_bitmap *bi,
+                                       struct gfs2_inode *ip, u32 biblk,
+                                       int amount)
+{
+        struct rb_node **newn, *parent = NULL;
+        int rc;
+        struct gfs2_blkreserv *rs = ip->i_res;
+        struct gfs2_rgrpd *rgd = rs->rs_rgd;
+        u64 fsblock = gfs2_bi2rgd_blk(bi, biblk) + rgd->rd_data0;
 
-struct gfs2_qadata *gfs2_qadata_get(struct gfs2_inode *ip)
+        spin_lock(&rgd->rd_rsspin);
+        newn = &rgd->rd_rstree.rb_node;
+        BUG_ON(!ip->i_res);
+        BUG_ON(gfs2_rs_active(rs));
+        /* Figure out where to put new node */
+        /*BUG_ON(!gfs2_glock_is_locked_by_me(rgd->rd_gl));*/
+        while (*newn) {
+                struct gfs2_blkreserv *cur =
+                        rb_entry(*newn, struct gfs2_blkreserv, rs_node);
+
+                parent = *newn;
+                rc = rs_cmp(fsblock, amount, cur);
+                if (rc > 0)
+                        newn = &((*newn)->rb_right);
+                else if (rc < 0)
+                        newn = &((*newn)->rb_left);
+                else {
+                        spin_unlock(&rgd->rd_rsspin);
+                        return NULL; /* reservation already in use */
+                }
+        }
+
+        /* Do our reservation work */
+        rs = ip->i_res;
+        rs->rs_free = amount;
+        rs->rs_biblk = biblk;
+        rs->rs_bi = bi;
+        rb_link_node(&rs->rs_node, parent, newn);
+        rb_insert_color(&rs->rs_node, &rgd->rd_rstree);
+
+        /* Do our inode accounting for the reservation */
+        /*BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));*/
+
+        /* Do our rgrp accounting for the reservation */
+        rgd->rd_reserved += amount; /* blocks reserved */
+        rgd->rd_rs_cnt++; /* number of in-tree reservations */
+        spin_unlock(&rgd->rd_rsspin);
+        trace_gfs2_rs(ip, rs, TRACE_RS_INSERT);
+        return rs;
+}
+
+/**
+ * unclaimed_blocks - return number of blocks that aren't spoken for
+ */
+static u32 unclaimed_blocks(struct gfs2_rgrpd *rgd)
 {
-        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        int error;
-        BUG_ON(ip->i_qadata != NULL);
-        ip->i_qadata = kzalloc(sizeof(struct gfs2_qadata), GFP_NOFS);
-        error = gfs2_rindex_update(sdp);
-        if (error)
-                fs_warn(sdp, "rindex update returns %d\n", error);
-        return ip->i_qadata;
+        return rgd->rd_free_clone - rgd->rd_reserved;
 }
 
 /**
- * gfs2_blkrsv_get - get the struct gfs2_blkreserv structure for an inode
- * @ip: the incore GFS2 inode structure
+ * rg_mblk_search - find a group of multiple free blocks
+ * @rgd: the resource group descriptor
+ * @rs: the block reservation
+ * @ip: pointer to the inode for which we're reserving blocks
  *
- * Returns: the struct gfs2_qadata
+ * This is very similar to rgblk_search, except we're looking for whole
+ * 64-bit words that represent a chunk of 32 free blocks. I'm only focusing
+ * on aligned dwords for speed's sake.
+ *
+ * Returns: 0 if successful or BFITNOENT if there isn't enough free space
  */
 
-static int gfs2_blkrsv_get(struct gfs2_inode *ip)
+static int rg_mblk_search(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
 {
-        BUG_ON(ip->i_res != NULL);
-        ip->i_res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS);
-        if (!ip->i_res)
-                return -ENOMEM;
-        return 0;
+        struct gfs2_bitmap *bi = rgd->rd_bits;
+        const u32 length = rgd->rd_length;
+        u32 blk;
+        unsigned int buf, x, search_bytes;
+        u8 *buffer = NULL;
+        u8 *ptr, *end, *nonzero;
+        u32 goal, rsv_bytes;
+        struct gfs2_blkreserv *rs;
+        u32 best_rs_bytes, unclaimed;
+        int best_rs_blocks;
+
+        /* Find bitmap block that contains bits for goal block */
+        if (rgrp_contains_block(rgd, ip->i_goal))
+                goal = ip->i_goal - rgd->rd_data0;
+        else
+                goal = rgd->rd_last_alloc;
+        for (buf = 0; buf < length; buf++) {
+                bi = rgd->rd_bits + buf;
+                /* Convert scope of "goal" from rgrp-wide to within
+                   found bit block */
+                if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY) {
+                        goal -= bi->bi_start * GFS2_NBBY;
+                        goto do_search;
+                }
+        }
+        buf = 0;
+        goal = 0;
+
+do_search:
+        best_rs_blocks = max_t(int, atomic_read(&ip->i_res->rs_sizehint),
+                               (RGRP_RSRV_MINBLKS * rgd->rd_length));
+        best_rs_bytes = (best_rs_blocks *
+                         (1 + (RSRV_CONTENTION_FACTOR * rgd->rd_rs_cnt))) /
+                GFS2_NBBY; /* 1 + is for our not-yet-created reservation */
+        best_rs_bytes = ALIGN(best_rs_bytes, sizeof(u64));
+        unclaimed = unclaimed_blocks(rgd);
+        if (best_rs_bytes * GFS2_NBBY > unclaimed)
+                best_rs_bytes = unclaimed >> GFS2_BIT_SIZE;
+
+        for (x = 0; x <= length; x++) {
+                bi = rgd->rd_bits + buf;
+
+                if (test_bit(GBF_FULL, &bi->bi_flags))
+                        goto skip;
+
+                WARN_ON(!buffer_uptodate(bi->bi_bh));
+                if (bi->bi_clone)
+                        buffer = bi->bi_clone + bi->bi_offset;
+                else
+                        buffer = bi->bi_bh->b_data + bi->bi_offset;
+
+                /* We have to keep the reservations aligned on u64 boundaries
+                   otherwise we could get situations where a byte can't be
+                   used because it's after a reservation, but a free bit still
+                   is within the reservation's area. */
+                ptr = buffer + ALIGN(goal >> GFS2_BIT_SIZE, sizeof(u64));
+                end = (buffer + bi->bi_len);
+                while (ptr < end) {
+                        rsv_bytes = 0;
+                        if ((ptr + best_rs_bytes) <= end)
+                                search_bytes = best_rs_bytes;
+                        else
+                                search_bytes = end - ptr;
+                        BUG_ON(!search_bytes);
+                        nonzero = memchr_inv(ptr, 0, search_bytes);
+                        /* If the lot is all zeroes, reserve the whole size. If
+                           there's enough zeroes to satisfy the request, use
+                           what we can. If there's not enough, keep looking. */
+                        if (nonzero == NULL)
+                                rsv_bytes = search_bytes;
+                        else if ((nonzero - ptr) * GFS2_NBBY >=
+                                 ip->i_res->rs_requested)
+                                rsv_bytes = (nonzero - ptr);
+
+                        if (rsv_bytes) {
+                                blk = ((ptr - buffer) * GFS2_NBBY);
+                                BUG_ON(blk >= bi->bi_len * GFS2_NBBY);
+                                rs = rs_insert(bi, ip, blk,
+                                               rsv_bytes * GFS2_NBBY);
+                                if (IS_ERR(rs))
+                                        return PTR_ERR(rs);
+                                if (rs)
+                                        return 0;
+                        }
+                        ptr += ALIGN(search_bytes, sizeof(u64));
+                }
+skip:
+                /* Try next bitmap block (wrap back to rgrp header
+                   if at end) */
+                buf++;
+                buf %= length;
+                goal = 0;
+        }
+
+        return BFITNOENT;
 }
 
 /**
@@ -1014,24 +1455,26 @@ static int gfs2_blkrsv_get(struct gfs2_inode *ip)
  * @ip: the inode
  *
  * If there's room for the requested blocks to be allocated from the RG:
+ * This will try to get a multi-block reservation first, and if that doesn't
+ * fit, it will take what it can.
  *
  * Returns: 1 on success (it fits), 0 on failure (it doesn't fit)
  */
 
-static int try_rgrp_fit(const struct gfs2_rgrpd *rgd, const struct gfs2_inode *ip)
+static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
 {
-        const struct gfs2_blkreserv *rs = ip->i_res;
+        struct gfs2_blkreserv *rs = ip->i_res;
 
         if (rgd->rd_flags & (GFS2_RGF_NOALLOC | GFS2_RDF_ERROR))
                 return 0;
-        if (rgd->rd_free_clone >= rs->rs_requested)
+        /* Look for a multi-block reservation. */
+        if (unclaimed_blocks(rgd) >= RGRP_RSRV_MINBLKS &&
+            rg_mblk_search(rgd, ip) != BFITNOENT)
+                return 1;
+        if (unclaimed_blocks(rgd) >= rs->rs_requested)
                 return 1;
-        return 0;
-}
 
-static inline u32 gfs2_bi2rgd_blk(struct gfs2_bitmap *bi, u32 blk)
-{
-        return (bi->bi_start * GFS2_NBBY) + blk;
+        return 0;
 }
 
 /**
@@ -1101,119 +1544,120 @@ static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip
 }
 
 /**
- * get_local_rgrp - Choose and lock a rgrp for allocation
+ * gfs2_inplace_reserve - Reserve space in the filesystem
  * @ip: the inode to reserve space for
- * @last_unlinked: the last unlinked block
- *
- * Try to acquire rgrp in way which avoids contending with others.
+ * @requested: the number of blocks to be reserved
  *
  * Returns: errno
  */
 
-static int get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked)
+int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_rgrpd *rgd, *begin = NULL;
+        struct gfs2_rgrpd *begin = NULL;
         struct gfs2_blkreserv *rs = ip->i_res;
-        int error, rg_locked, flags = LM_FLAG_TRY;
+        int error = 0, rg_locked, flags = LM_FLAG_TRY;
+        u64 last_unlinked = NO_BLOCK;
         int loops = 0;
 
-        if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal))
-                rgd = begin = ip->i_rgd;
-        else
-                rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1);
-
-        if (rgd == NULL)
+        if (sdp->sd_args.ar_rgrplvb)
+                flags |= GL_SKIP;
+        rs->rs_requested = requested;
+        if (gfs2_assert_warn(sdp, requested)) {
+                error = -EINVAL;
+                goto out;
+        }
+        if (gfs2_rs_active(rs)) {
+                begin = rs->rs_rgd;
+                flags = 0; /* Yoda: Do or do not. There is no try */
+        } else if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal)) {
+                rs->rs_rgd = begin = ip->i_rgd;
+        } else {
+                rs->rs_rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1);
+        }
+        if (rs->rs_rgd == NULL)
                 return -EBADSLT;
 
         while (loops < 3) {
                 rg_locked = 0;
 
-                if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) {
+                if (gfs2_glock_is_locked_by_me(rs->rs_rgd->rd_gl)) {
                         rg_locked = 1;
                         error = 0;
+                } else if (!loops && !gfs2_rs_active(rs) &&
+                           rs->rs_rgd->rd_rs_cnt > RGRP_RSRV_MAX_CONTENDERS) {
+                        /* If the rgrp already is maxed out for contenders,
+                           we can eliminate it as a "first pass" without even
+                           requesting the rgrp glock. */
+                        error = GLR_TRYFAILED;
                 } else {
-                        error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
-                                                   flags, &rs->rs_rgd_gh);
+                        error = gfs2_glock_nq_init(rs->rs_rgd->rd_gl,
+                                                   LM_ST_EXCLUSIVE, flags,
+                                                   &rs->rs_rgd_gh);
+                        if (!error && sdp->sd_args.ar_rgrplvb) {
+                                error = update_rgrp_lvb(rs->rs_rgd);
+                                if (error) {
+                                        gfs2_glock_dq_uninit(&rs->rs_rgd_gh);
+                                        return error;
+                                }
+                        }
                 }
                 switch (error) {
                 case 0:
-                        if (try_rgrp_fit(rgd, ip)) {
-                                ip->i_rgd = rgd;
+                        if (gfs2_rs_active(rs)) {
+                                if (unclaimed_blocks(rs->rs_rgd) +
+                                    rs->rs_free >= rs->rs_requested) {
+                                        ip->i_rgd = rs->rs_rgd;
+                                        return 0;
+                                }
+                                /* We have a multi-block reservation, but the
+                                   rgrp doesn't have enough free blocks to
+                                   satisfy the request. Free the reservation
+                                   and look for a suitable rgrp. */
+                                gfs2_rs_deltree(rs);
+                        }
+                        if (try_rgrp_fit(rs->rs_rgd, ip)) {
+                                if (sdp->sd_args.ar_rgrplvb)
+                                        gfs2_rgrp_bh_get(rs->rs_rgd);
+                                ip->i_rgd = rs->rs_rgd;
                                 return 0;
                         }
-                        if (rgd->rd_flags & GFS2_RDF_CHECK)
-                                try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr);
+                        if (rs->rs_rgd->rd_flags & GFS2_RDF_CHECK) {
+                                if (sdp->sd_args.ar_rgrplvb)
+                                        gfs2_rgrp_bh_get(rs->rs_rgd);
+                                try_rgrp_unlink(rs->rs_rgd, &last_unlinked,
+                                                ip->i_no_addr);
+                        }
                         if (!rg_locked)
                                 gfs2_glock_dq_uninit(&rs->rs_rgd_gh);
                         /* fall through */
                 case GLR_TRYFAILED:
-                        rgd = gfs2_rgrpd_get_next(rgd);
-                        if (rgd == begin) {
-                                flags = 0;
-                                loops++;
-                        }
+                        rs->rs_rgd = gfs2_rgrpd_get_next(rs->rs_rgd);
+                        rs->rs_rgd = rs->rs_rgd ? : begin; /* if NULL, wrap */
+                        if (rs->rs_rgd != begin) /* If we didn't wrap */
+                                break;
+
+                        flags &= ~LM_FLAG_TRY;
+                        loops++;
+                        /* Check that fs hasn't grown if writing to rindex */
+                        if (ip == GFS2_I(sdp->sd_rindex) &&
+                            !sdp->sd_rindex_uptodate) {
+                                error = gfs2_ri_update(ip);
+                                if (error)
+                                        goto out;
+                        } else if (loops == 2)
+                                /* Flushing the log may release space */
+                                gfs2_log_flush(sdp, NULL);
                         break;
                 default:
-                        return error;
+                        goto out;
                 }
         }
-
-        return -ENOSPC;
-}
-
-static void gfs2_blkrsv_put(struct gfs2_inode *ip)
-{
-        BUG_ON(ip->i_res == NULL);
-        kmem_cache_free(gfs2_rsrv_cachep, ip->i_res);
-        ip->i_res = NULL;
-}
-
-/**
- * gfs2_inplace_reserve - Reserve space in the filesystem
- * @ip: the inode to reserve space for
- * @requested: the number of blocks to be reserved
- *
- * Returns: errno
- */
-
-int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested)
-{
-        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_blkreserv *rs;
-        int error;
-        u64 last_unlinked = NO_BLOCK;
-        int tries = 0;
-
-        error = gfs2_blkrsv_get(ip);
-        if (error)
-                return error;
-
-        rs = ip->i_res;
-        rs->rs_requested = requested;
-        if (gfs2_assert_warn(sdp, requested)) {
-                error = -EINVAL;
-                goto out;
-        }
-
-        do {
-                error = get_local_rgrp(ip, &last_unlinked);
-                if (error != -ENOSPC)
-                        break;
-                /* Check that fs hasn't grown if writing to rindex */
-                if (ip == GFS2_I(sdp->sd_rindex) && !sdp->sd_rindex_uptodate) {
-                        error = gfs2_ri_update(ip);
-                        if (error)
-                                break;
-                        continue;
-                }
-                /* Flushing the log may release space */
-                gfs2_log_flush(sdp, NULL);
-        } while (tries++ < 3);
+        error = -ENOSPC;
 
 out:
         if (error)
-                gfs2_blkrsv_put(ip);
+                rs->rs_requested = 0;
         return error;
 }
 
@@ -1228,9 +1672,15 @@ void gfs2_inplace_release(struct gfs2_inode *ip)
 {
         struct gfs2_blkreserv *rs = ip->i_res;
 
+        if (!rs)
+                return;
+
+        if (!rs->rs_free)
+                gfs2_rs_deltree(rs);
+
         if (rs->rs_rgd_gh.gh_gl)
                 gfs2_glock_dq_uninit(&rs->rs_rgd_gh);
-        gfs2_blkrsv_put(ip);
+        rs->rs_requested = 0;
 }
 
 /**
@@ -1326,7 +1776,27 @@ do_search:
                 if (state != GFS2_BLKST_UNLINKED && bi->bi_clone)
                         buffer = bi->bi_clone + bi->bi_offset;
 
-                biblk = gfs2_bitfit(buffer, bi->bi_len, goal, state);
+                while (1) {
+                        struct gfs2_blkreserv *rs;
+                        u32 rgblk;
+
+                        biblk = gfs2_bitfit(buffer, bi->bi_len, goal, state);
+                        if (biblk == BFITNOENT)
+                                break;
+                        /* Check if this block is reserved() */
+                        rgblk = gfs2_bi2rgd_blk(bi, biblk);
+                        rs = rs_find(rgd, rgblk);
+                        if (rs == NULL)
+                                break;
+
+                        BUG_ON(rs->rs_bi != bi);
+                        biblk = BFITNOENT;
+                        /* This should jump to the first block after the
+                           reservation. */
+                        goal = rs->rs_biblk + rs->rs_free;
+                        if (goal >= bi->bi_len * GFS2_NBBY)
+                                break;
+                }
                 if (biblk != BFITNOENT)
                         break;
 
@@ -1362,8 +1832,9 @@ static u64 gfs2_alloc_extent(struct gfs2_rgrpd *rgd, struct gfs2_bitmap *bi,
                              u32 blk, bool dinode, unsigned int *n)
 {
         const unsigned int elen = *n;
-        u32 goal;
+        u32 goal, rgblk;
         const u8 *buffer = NULL;
+        struct gfs2_blkreserv *rs;
 
         *n = 0;
         buffer = bi->bi_bh->b_data + bi->bi_offset;
@@ -1376,6 +1847,10 @@ static u64 gfs2_alloc_extent(struct gfs2_rgrpd *rgd, struct gfs2_bitmap *bi,
                 goal++;
                 if (goal >= (bi->bi_len * GFS2_NBBY))
                         break;
+                rgblk = gfs2_bi2rgd_blk(bi, goal);
+                rs = rs_find(rgd, rgblk);
+                if (rs) /* Oops, we bumped into someone's reservation */
+                        break;
                 if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) !=
                     GFS2_BLKST_FREE)
                         break;
@@ -1451,12 +1926,22 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
 
 int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 {
-        const struct gfs2_rgrpd *rgd = gl->gl_object;
+        struct gfs2_rgrpd *rgd = gl->gl_object;
+        struct gfs2_blkreserv *trs;
+        const struct rb_node *n;
+
         if (rgd == NULL)
                 return 0;
-        gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n",
+        gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u r:%u\n",
                        (unsigned long long)rgd->rd_addr, rgd->rd_flags,
-                       rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes);
+                       rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes,
+                       rgd->rd_reserved);
+        spin_lock(&rgd->rd_rsspin);
+        for (n = rb_first(&rgd->rd_rstree); n; n = rb_next(&trs->rs_node)) {
+                trs = rb_entry(n, struct gfs2_blkreserv, rs_node);
+                dump_rs(seq, trs);
+        }
+        spin_unlock(&rgd->rd_rsspin);
         return 0;
 }
 
@@ -1471,10 +1956,63 @@ static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd)
 }
 
 /**
+ * claim_reserved_blks - Claim previously reserved blocks
+ * @ip: the inode that's claiming the reservation
+ * @dinode: 1 if this block is a dinode block, otherwise data block
+ * @nblocks: desired extent length
+ *
+ * Lay claim to previously allocated block reservation blocks.
+ * Returns: Starting block number of the blocks claimed.
+ * Sets *nblocks to the actual extent length allocated.
+ */
+static u64 claim_reserved_blks(struct gfs2_inode *ip, bool dinode,
+                               unsigned int *nblocks)
+{
+        struct gfs2_blkreserv *rs = ip->i_res;
+        struct gfs2_rgrpd *rgd = rs->rs_rgd;
+        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+        struct gfs2_bitmap *bi;
+        u64 start_block = gfs2_rs_startblk(rs);
+        const unsigned int elen = *nblocks;
+
+        /*BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));*/
+        gfs2_assert_withdraw(sdp, rgd);
+        /*BUG_ON(!gfs2_glock_is_locked_by_me(rgd->rd_gl));*/
+        bi = rs->rs_bi;
+        gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
+
+        for (*nblocks = 0; *nblocks < elen && rs->rs_free; (*nblocks)++) {
+                /* Make sure the bitmap hasn't changed */
+                gfs2_setbit(rgd, bi->bi_clone, bi, rs->rs_biblk,
+                            dinode ? GFS2_BLKST_DINODE : GFS2_BLKST_USED);
+                rs->rs_biblk++;
+                rs->rs_free--;
+
+                BUG_ON(!rgd->rd_reserved);
+                rgd->rd_reserved--;
+                dinode = false;
+                trace_gfs2_rs(ip, rs, TRACE_RS_CLAIM);
+        }
+
+        if (!rs->rs_free) {
+                struct gfs2_rgrpd *rgd = ip->i_res->rs_rgd;
+
+                gfs2_rs_deltree(rs);
+                /* -nblocks because we haven't returned to do the math yet.
+                   I'm doing the math backwards to prevent negative numbers,
+                   but think of it as:
+                   if (unclaimed_blocks(rgd) - *nblocks >= RGRP_RSRV_MINBLKS */
+                if (unclaimed_blocks(rgd) >= RGRP_RSRV_MINBLKS + *nblocks)
+                        rg_mblk_search(rgd, ip);
+        }
+        return start_block;
+}
+
+/**
  * gfs2_alloc_blocks - Allocate one or more blocks of data and/or a dinode
  * @ip: the inode to allocate the block for
  * @bn: Used to return the starting block number
- * @ndata: requested number of blocks/extent length (value/result)
+ * @nblocks: requested number of blocks/extent length (value/result)
  * @dinode: 1 if we're allocating a dinode block, else 0
  * @generation: the generation number of the inode
  *
@@ -1496,23 +2034,37 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
         /* Only happens if there is a bug in gfs2, return something distinctive
          * to ensure that it is noticed.
          */
-        if (ip->i_res == NULL)
+        if (ip->i_res->rs_requested == 0)
                 return -ECANCELED;
 
-        rgd = ip->i_rgd;
-
-        if (!dinode && rgrp_contains_block(rgd, ip->i_goal))
-                goal = ip->i_goal - rgd->rd_data0;
-        else
-                goal = rgd->rd_last_alloc;
-
-        blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, &bi);
+        /* Check if we have a multi-block reservation, and if so, claim the
+           next free block from it. */
+        if (gfs2_rs_active(ip->i_res)) {
+                BUG_ON(!ip->i_res->rs_free);
+                rgd = ip->i_res->rs_rgd;
+                block = claim_reserved_blks(ip, dinode, nblocks);
+        } else {
+                rgd = ip->i_rgd;
 
-        /* Since all blocks are reserved in advance, this shouldn't happen */
-        if (blk == BFITNOENT)
-                goto rgrp_error;
+                if (!dinode && rgrp_contains_block(rgd, ip->i_goal))
+                        goal = ip->i_goal - rgd->rd_data0;
+                else
+                        goal = rgd->rd_last_alloc;
+
+                blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, &bi);
+
+                /* Since all blocks are reserved in advance, this shouldn't
+                   happen */
+                if (blk == BFITNOENT) {
+                        printk(KERN_WARNING "BFITNOENT, nblocks=%u\n",
+                               *nblocks);
+                        printk(KERN_WARNING "FULL=%d\n",
+                               test_bit(GBF_FULL, &rgd->rd_bits->bi_flags));
+                        goto rgrp_error;
+                }
 
-        block = gfs2_alloc_extent(rgd, bi, blk, dinode, nblocks);
+                block = gfs2_alloc_extent(rgd, bi, blk, dinode, nblocks);
+        }
         ndata = *nblocks;
         if (dinode)
                 ndata--;
@@ -1529,8 +2081,10 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
                         brelse(dibh);
                 }
         }
-        if (rgd->rd_free < *nblocks)
+        if (rgd->rd_free < *nblocks) {
+                printk(KERN_WARNING "nblocks=%u\n", *nblocks);
                 goto rgrp_error;
+        }
 
         rgd->rd_free -= *nblocks;
         if (dinode) {
@@ -1542,6 +2096,7 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
 
         gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
         gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
+        gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data);
 
         gfs2_statfs_change(sdp, 0, -(s64)*nblocks, dinode ? 1 : 0);
         if (dinode)
@@ -1588,6 +2143,7 @@ void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta)
         rgd->rd_flags &= ~GFS2_RGF_TRIMMED;
         gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
         gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
+        gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data);
 
         /* Directories keep their data in the metadata address space */
         if (meta || ip->i_depth)
@@ -1624,6 +2180,8 @@ void gfs2_unlink_di(struct inode *inode)
         trace_gfs2_block_alloc(ip, rgd, blkno, 1, GFS2_BLKST_UNLINKED);
         gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
         gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
+        gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data);
+        update_rgrp_lvb_unlinked(rgd, 1);
 }
 
 static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno)
@@ -1643,6 +2201,8 @@ static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno)
 
         gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
         gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
+        gfs2_rgrp_ondisk2lvb(rgd->rd_rgl, rgd->rd_bits[0].bi_bh->b_data);
+        update_rgrp_lvb_unlinked(rgd, -1);
 
         gfs2_statfs_change(sdp, 0, +1, -1);
 }
@@ -1784,6 +2344,7 @@ void gfs2_rlist_free(struct gfs2_rgrp_list *rlist)
                 for (x = 0; x < rlist->rl_rgrps; x++)
                         gfs2_holder_uninit(&rlist->rl_ghs[x]);
                 kfree(rlist->rl_ghs);
+                rlist->rl_ghs = NULL;
         }
 }
 
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index b4b10f4de25f..ca6e26729b86 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -13,6 +13,14 @@
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 
+/* Since each block in the file system is represented by two bits in the
+ * bitmap, one 64-bit word in the bitmap will represent 32 blocks.
+ * By reserving 32 blocks at a time, we can optimize / shortcut how we search
+ * through the bitmaps by looking a word at a time.
+ */
+#define RGRP_RSRV_MINBYTES 8
+#define RGRP_RSRV_MINBLKS ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY))
+
 struct gfs2_rgrpd;
 struct gfs2_sbd;
 struct gfs2_holder;
@@ -29,13 +37,7 @@ extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
 extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
 extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
 
-extern struct gfs2_qadata *gfs2_qadata_get(struct gfs2_inode *ip);
-static inline void gfs2_qadata_put(struct gfs2_inode *ip)
-{
-        BUG_ON(ip->i_qadata == NULL);
-        kfree(ip->i_qadata);
-        ip->i_qadata = NULL;
-}
+extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
 
 extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested);
 extern void gfs2_inplace_release(struct gfs2_inode *ip);
@@ -43,6 +45,9 @@ extern void gfs2_inplace_release(struct gfs2_inode *ip);
 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
                              bool dinode, u64 *generation);
 
+extern int gfs2_rs_alloc(struct gfs2_inode *ip);
+extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
+extern void gfs2_rs_delete(struct gfs2_inode *ip);
 extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
 extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
@@ -68,4 +73,30 @@ extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
                                    const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
 extern int gfs2_fitrim(struct file *filp, void __user *argp);
 
+/* This is how to tell if a multi-block reservation is "inplace" reserved: */
+static inline int gfs2_mb_reserved(struct gfs2_inode *ip)
+{
+        if (ip->i_res && ip->i_res->rs_requested)
+                return 1;
+        return 0;
+}
+
+/* This is how to tell if a multi-block reservation is in the rgrp tree: */
+static inline int gfs2_rs_active(struct gfs2_blkreserv *rs)
+{
+        if (rs && rs->rs_bi)
+                return 1;
+        return 0;
+}
+
+static inline u32 gfs2_bi2rgd_blk(const struct gfs2_bitmap *bi, u32 blk)
+{
+        return (bi->bi_start * GFS2_NBBY) + blk;
+}
+
+static inline u64 gfs2_rs_startblk(const struct gfs2_blkreserv *rs)
+{
+        return gfs2_bi2rgd_blk(rs->rs_bi, rs->rs_biblk) + rs->rs_rgd->rd_data0;
+}
+
 #endif /* __RGRP_DOT_H__ */
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index f3d6bbfb32c5..fc3168f47a14 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -78,6 +78,8 @@ enum {
         Opt_quota_quantum,
         Opt_barrier,
         Opt_nobarrier,
+        Opt_rgrplvb,
+        Opt_norgrplvb,
         Opt_error,
 };
 
@@ -115,6 +117,8 @@ static const match_table_t tokens = {
         {Opt_quota_quantum, "quota_quantum=%d"},
         {Opt_barrier, "barrier"},
         {Opt_nobarrier, "nobarrier"},
+        {Opt_rgrplvb, "rgrplvb"},
+        {Opt_norgrplvb, "norgrplvb"},
         {Opt_error, NULL}
 };
 
@@ -267,6 +271,12 @@ int gfs2_mount_args(struct gfs2_args *args, char *options)
                 case Opt_nobarrier:
                         args->ar_nobarrier = 1;
                         break;
+                case Opt_rgrplvb:
+                        args->ar_rgrplvb = 1;
+                        break;
+                case Opt_norgrplvb:
+                        args->ar_rgrplvb = 0;
+                        break;
                 case Opt_error:
                 default:
                         printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o);
@@ -1381,6 +1391,8 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
                 seq_printf(s, ",nobarrier");
         if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
                 seq_printf(s, ",demote_interface_used");
+        if (args->ar_rgrplvb)
+                seq_printf(s, ",rgrplvb");
         return 0;
 }
 
@@ -1401,7 +1413,6 @@ static void gfs2_final_release_pages(struct gfs2_inode *ip)
 static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-        struct gfs2_qadata *qa;
         struct gfs2_rgrpd *rgd;
         struct gfs2_holder gh;
         int error;
@@ -1411,13 +1422,13 @@ static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
                 return -EIO;
         }
 
-        qa = gfs2_qadata_get(ip);
-        if (!qa)
-                return -ENOMEM;
+        error = gfs2_rindex_update(sdp);
+        if (error)
+                return error;
 
         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
-                goto out;
+                return error;
 
         rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
         if (!rgd) {
@@ -1445,8 +1456,6 @@ out_rg_gunlock:
         gfs2_glock_dq_uninit(&gh);
 out_qs:
         gfs2_quota_unhold(ip);
-out:
-        gfs2_qadata_put(ip);
         return error;
 }
 
@@ -1547,6 +1556,9 @@ out_truncate:
 
 out_unlock:
         /* Error path for case 1 */
+        if (gfs2_rs_active(ip->i_res))
+                gfs2_rs_deltree(ip->i_res);
+
         if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags))
                 gfs2_glock_dq(&ip->i_iopen_gh);
         gfs2_holder_uninit(&ip->i_iopen_gh);
@@ -1556,6 +1568,7 @@ out_unlock:
 out:
         /* Case 3 starts here */
         truncate_inode_pages(&inode->i_data, 0);
+        gfs2_rs_delete(ip);
         clear_inode(inode);
         gfs2_dir_hash_inval(ip);
         ip->i_gl->gl_object = NULL;
@@ -1578,6 +1591,7 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
                 ip->i_flags = 0;
                 ip->i_gl = NULL;
                 ip->i_rgd = NULL;
+                ip->i_res = NULL;
         }
         return &ip->i_inode;
 }
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 73ecc34c4342..8056b7b7238e 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -276,7 +276,15 @@ static struct attribute *gfs2_attrs[] = {
         NULL,
 };
 
+static void gfs2_sbd_release(struct kobject *kobj)
+{
+        struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+
+        kfree(sdp);
+}
+
 static struct kobj_type gfs2_ktype = {
+        .release = gfs2_sbd_release,
         .default_attrs = gfs2_attrs,
         .sysfs_ops     = &gfs2_attr_ops,
 };
@@ -583,6 +591,7 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
         char ro[20];
         char spectator[20];
         char *envp[] = { ro, spectator, NULL };
+        int sysfs_frees_sdp = 0;
 
         sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
         sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
@@ -591,8 +600,10 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
         error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
                                      "%s", sdp->sd_table_name);
         if (error)
-                goto fail;
+                goto fail_reg;
 
+        sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
+                                function gfs2_sbd_release. */
         error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
         if (error)
                 goto fail_reg;
@@ -615,9 +626,13 @@ fail_lock_module:
 fail_tune:
         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 fail_reg:
-        kobject_put(&sdp->sd_kobj);
-fail:
+        free_percpu(sdp->sd_lkstats);
         fs_err(sdp, "error %d adding sysfs files", error);
+        if (sysfs_frees_sdp)
+                kobject_put(&sdp->sd_kobj);
+        else
+                kfree(sdp);
+        sb->s_fs_info = NULL;
         return error;
 }
 
diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h
index 1b8b81588199..a25c252fe412 100644
--- a/fs/gfs2/trace_gfs2.h
+++ b/fs/gfs2/trace_gfs2.h
@@ -14,6 +14,7 @@
 #include <linux/ktime.h>
 #include "incore.h"
 #include "glock.h"
+#include "rgrp.h"
 
 #define dlm_state_name(nn) { DLM_LOCK_##nn, #nn }
 #define glock_trace_name(x) __print_symbolic(x,         \
@@ -31,6 +32,17 @@
                             { GFS2_BLKST_DINODE, "dinode" },    \
                             { GFS2_BLKST_UNLINKED, "unlinked" })
 
+#define TRACE_RS_DELETE  0
+#define TRACE_RS_TREEDEL 1
+#define TRACE_RS_INSERT  2
+#define TRACE_RS_CLAIM   3
+
+#define rs_func_name(x) __print_symbolic(x,     \
+                                         { 0, "del " }, \
+                                         { 1, "tdel" }, \
+                                         { 2, "ins " }, \
+                                         { 3, "clm " })
+
 #define show_glock_flags(flags) __print_flags(flags, "",        \
         {(1UL << GLF_LOCK),                     "l" },          \
         {(1UL << GLF_DEMOTE),                   "D" },          \
@@ -470,6 +482,7 @@ TRACE_EVENT(gfs2_block_alloc,
                 __field(        u8,     block_state             )
                 __field(        u64,    rd_addr                 )
                 __field(        u32,    rd_free_clone           )
+                __field(        u32,    rd_reserved             )
         ),
 
         TP_fast_assign(
@@ -480,16 +493,58 @@ TRACE_EVENT(gfs2_block_alloc,
                 __entry->block_state    = block_state;
                 __entry->rd_addr        = rgd->rd_addr;
                 __entry->rd_free_clone  = rgd->rd_free_clone;
+                __entry->rd_reserved    = rgd->rd_reserved;
         ),
 
-        TP_printk("%u,%u bmap %llu alloc %llu/%lu %s rg:%llu rf:%u",
+        TP_printk("%u,%u bmap %llu alloc %llu/%lu %s rg:%llu rf:%u rr:%lu",
                   MAJOR(__entry->dev), MINOR(__entry->dev),
                   (unsigned long long)__entry->inum,
                   (unsigned long long)__entry->start,
                   (unsigned long)__entry->len,
                   block_state_name(__entry->block_state),
                   (unsigned long long)__entry->rd_addr,
-                  __entry->rd_free_clone)
+                  __entry->rd_free_clone, (unsigned long)__entry->rd_reserved)
+);
+
+/* Keep track of multi-block reservations as they are allocated/freed */
+TRACE_EVENT(gfs2_rs,
+
+        TP_PROTO(const struct gfs2_inode *ip, const struct gfs2_blkreserv *rs,
+                 u8 func),
+
+        TP_ARGS(ip, rs, func),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        u64,    rd_addr                 )
+                __field(        u32,    rd_free_clone           )
+                __field(        u32,    rd_reserved             )
+                __field(        u64,    inum                    )
+                __field(        u64,    start                   )
+                __field(        u32,    free                    )
+                __field(        u8,     func                    )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = rs->rs_rgd ? rs->rs_rgd->rd_sbd->sd_vfs->s_dev : 0;
+                __entry->rd_addr        = rs->rs_rgd ? rs->rs_rgd->rd_addr : 0;
+                __entry->rd_free_clone  = rs->rs_rgd ? rs->rs_rgd->rd_free_clone : 0;
+                __entry->rd_reserved    = rs->rs_rgd ? rs->rs_rgd->rd_reserved : 0;
+                __entry->inum           = ip ? ip->i_no_addr : 0;
+                __entry->start          = gfs2_rs_startblk(rs);
+                __entry->free           = rs->rs_free;
+                __entry->func           = func;
+        ),
+
+        TP_printk("%u,%u bmap %llu resrv %llu rg:%llu rf:%lu rr:%lu %s "
+                  "f:%lu",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  (unsigned long long)__entry->inum,
+                  (unsigned long long)__entry->start,
+                  (unsigned long long)__entry->rd_addr,
+                  (unsigned long)__entry->rd_free_clone,
+                  (unsigned long)__entry->rd_reserved,
+                  rs_func_name(__entry->func), (unsigned long)__entry->free)
 );
 
 #endif /* _TRACE_GFS2_H */
diff --git a/fs/gfs2/trans.h b/fs/gfs2/trans.h
index 125d4572e1c0..41f42cdccbb8 100644
--- a/fs/gfs2/trans.h
+++ b/fs/gfs2/trans.h
@@ -31,7 +31,7 @@ struct gfs2_glock;
 static inline unsigned int gfs2_rg_blocks(const struct gfs2_inode *ip)
 {
         const struct gfs2_blkreserv *rs = ip->i_res;
-        if (rs->rs_requested < ip->i_rgd->rd_length)
+        if (rs && rs->rs_requested < ip->i_rgd->rd_length)
                 return rs->rs_requested + 1;
         return ip->i_rgd->rd_length;
 }
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
index 3586b0dd6aa7..80535739ac7b 100644
--- a/fs/gfs2/util.h
+++ b/fs/gfs2/util.h
@@ -79,23 +79,19 @@ int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
                        const char *type, const char *function,
                        char *file, unsigned int line);
 
-static inline int gfs2_meta_check_i(struct gfs2_sbd *sdp,
-                                    struct buffer_head *bh,
-                                    const char *function,
-                                    char *file, unsigned int line)
+static inline int gfs2_meta_check(struct gfs2_sbd *sdp,
+                                    struct buffer_head *bh)
 {
         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
         u32 magic = be32_to_cpu(mh->mh_magic);
-        if (unlikely(magic != GFS2_MAGIC))
-                return gfs2_meta_check_ii(sdp, bh, "magic number", function,
-                                          file, line);
+        if (unlikely(magic != GFS2_MAGIC)) {
+                printk(KERN_ERR "GFS2: Magic number missing at %llu\n",
+                       (unsigned long long)bh->b_blocknr);
+                return -EIO;
+        }
         return 0;
 }
 
-#define gfs2_meta_check(sdp, bh) \
-gfs2_meta_check_i((sdp), (bh), __func__, __FILE__, __LINE__)
-
-
 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
                            u16 type, u16 t,
                            const char *function,
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 927f4df874ae..27a0b4a901f5 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -325,12 +325,11 @@ static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
                                struct gfs2_ea_header *ea,
                                struct gfs2_ea_header *prev, int leave)
 {
-        struct gfs2_qadata *qa;
         int error;
 
-        qa = gfs2_qadata_get(ip);
-        if (!qa)
-                return -ENOMEM;
+        error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
+        if (error)
+                return error;
 
         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
@@ -340,7 +339,6 @@ static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 
         gfs2_quota_unhold(ip);
 out_alloc:
-        gfs2_qadata_put(ip);
         return error;
 }
 
@@ -713,17 +711,16 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
                              unsigned int blks,
                              ea_skeleton_call_t skeleton_call, void *private)
 {
-        struct gfs2_qadata *qa;
         struct buffer_head *dibh;
         int error;
 
-        qa = gfs2_qadata_get(ip);
-        if (!qa)
-                return -ENOMEM;
+        error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
+        if (error)
+                return error;
 
         error = gfs2_quota_lock_check(ip);
         if (error)
-                goto out;
+                return error;
 
         error = gfs2_inplace_reserve(ip, blks);
         if (error)
@@ -753,8 +750,6 @@ out_ipres:
         gfs2_inplace_release(ip);
 out_gunlock_q:
         gfs2_quota_unlock(ip);
-out:
-        gfs2_qadata_put(ip);
         return error;
 }
 
@@ -1494,16 +1489,15 @@ out_gunlock:
 
 int gfs2_ea_dealloc(struct gfs2_inode *ip)
 {
-        struct gfs2_qadata *qa;
         int error;
 
-        qa = gfs2_qadata_get(ip);
-        if (!qa)
-                return -ENOMEM;
+        error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
+        if (error)
+                return error;
 
         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
-                goto out_alloc;
+                return error;
 
         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
         if (error)
@@ -1519,8 +1513,6 @@ int gfs2_ea_dealloc(struct gfs2_inode *ip)
 
 out_quota:
         gfs2_quota_unhold(ip);
-out_alloc:
-        gfs2_qadata_put(ip);
         return error;
 }
 
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 0cbd0494b79e..14cf9de1dbe1 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -385,15 +385,12 @@ int seq_escape(struct seq_file *m, const char *s, const char *esc)
 }
 EXPORT_SYMBOL(seq_escape);
 
-int seq_printf(struct seq_file *m, const char *f, ...)
+int seq_vprintf(struct seq_file *m, const char *f, va_list args)
 {
-        va_list args;
         int len;
 
         if (m->count < m->size) {
-                va_start(args, f);
                 len = vsnprintf(m->buf + m->count, m->size - m->count, f, args);
-                va_end(args);
                 if (m->count + len < m->size) {
                         m->count += len;
                         return 0;
@@ -402,6 +399,19 @@ int seq_printf(struct seq_file *m, const char *f, ...)
         seq_set_overflow(m);
         return -1;
 }
+EXPORT_SYMBOL(seq_vprintf);
+
+int seq_printf(struct seq_file *m, const char *f, ...)
+{
+        int ret;
+        va_list args;
+
+        va_start(args, f);
+        ret = seq_vprintf(m, f, args);
+        va_end(args);
+
+        return ret;
+}
 EXPORT_SYMBOL(seq_printf);
 
 /**
diff --git a/include/linux/gfs2_ondisk.h b/include/linux/gfs2_ondisk.h
index fa98bdb073b9..b2de1f9a88d6 100644
--- a/include/linux/gfs2_ondisk.h
+++ b/include/linux/gfs2_ondisk.h
@@ -170,6 +170,16 @@ struct gfs2_rindex {
 #define GFS2_RGF_NOALLOC        0x00000008
 #define GFS2_RGF_TRIMMED        0x00000010
 
+struct gfs2_rgrp_lvb {
+        __be32 rl_magic;
+        __be32 rl_flags;
+        __be32 rl_free;
+        __be32 rl_dinodes;
+        __be64 rl_igeneration;
+        __be32 rl_unlinked;
+        __be32 __pad;
+};
+
 struct gfs2_rgrp {
         struct gfs2_meta_header rg_header;
 
@@ -214,6 +224,7 @@ enum {
         gfs2fl_NoAtime          = 7,
         gfs2fl_Sync             = 8,
         gfs2fl_System           = 9,
+        gfs2fl_TopLevel         = 10,
         gfs2fl_TruncInProg      = 29,
         gfs2fl_InheritDirectio  = 30,
         gfs2fl_InheritJdata     = 31,
@@ -230,8 +241,9 @@ enum {
 #define GFS2_DIF_NOATIME                0x00000080
 #define GFS2_DIF_SYNC                   0x00000100
 #define GFS2_DIF_SYSTEM                 0x00000200 /* New in gfs2 */
+#define GFS2_DIF_TOPDIR                 0x00000400 /* New in gfs2 */
 #define GFS2_DIF_TRUNC_IN_PROG          0x20000000 /* New in gfs2 */
-#define GFS2_DIF_INHERIT_DIRECTIO       0x40000000
+#define GFS2_DIF_INHERIT_DIRECTIO       0x40000000 /* only in gfs1 */
 #define GFS2_DIF_INHERIT_JDATA          0x80000000
 
 struct gfs2_dinode {
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index fc61854f6224..83c44eefe698 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -86,6 +86,7 @@ int seq_puts(struct seq_file *m, const char *s);
 int seq_write(struct seq_file *seq, const void *data, size_t len);
 
 __printf(2, 3) int seq_printf(struct seq_file *, const char *, ...);
+__printf(2, 0) int seq_vprintf(struct seq_file *, const char *, va_list args);
 
 int seq_path(struct seq_file *, const struct path *, const char *);
 int seq_dentry(struct seq_file *, struct dentry *, const char *);