[GFS2] Clean up inode number handling

This patch cleans up the inode number handling code. The main difference
is that instead of looking up the inodes using a struct gfs2_inum_host
we now use just the no_addr member of this structure. The tests relating
to no_formal_ino can then be done by the calling code. This has
advantages in that we want to do different things in different code
paths if the no_formal_ino doesn't match. In the NFS patch we want to
return -ESTALE, but in the ->lookup() path, its a bug in the fs if the
no_formal_ino doesn't match and thus we can withdraw in this case.

In order to later fix bz #201012, we need to be able to look up an inode
without knowing no_formal_ino, as the only information that is known to
us is the on-disk location of the inode in question.

This patch will also help us to fix bz #236099 at a later date by
cleaning up a lot of the code in that area.

There are no user visible changes as a result of this patch and there
are no changes to the on-disk format either.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

18 files changed, 160 insertions, 161 deletions

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 1c40c4bbf379..e76a887a89b2 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1040,7 +1040,7 @@ static int trunc_end(struct gfs2_inode *ip)
                 ip->i_di.di_height = 0;
                 ip->i_di.di_goal_meta =
                         ip->i_di.di_goal_data =
-                        ip->i_num.no_addr;
+                        ip->i_no_addr;
                 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
         }
         ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index a96fa07b3f3b..9cdd71cef59c 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1456,7 +1456,7 @@ int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
                 if (dip->i_di.di_entries != g.offset) {
                         fs_warn(sdp, "Number of entries corrupt in dir %llu, "
                                 "ip->i_di.di_entries (%u) != g.offset (%u)\n",
-                                (unsigned long long)dip->i_num.no_addr,
+                                (unsigned long long)dip->i_no_addr,
                                 dip->i_di.di_entries,
                                 g.offset);
                         error = -EIO;
@@ -1488,24 +1488,54 @@ out:
  * Returns: errno
  */
 
-int gfs2_dir_search(struct inode *dir, const struct qstr *name,
-                    struct gfs2_inum_host *inum, unsigned int *type)
+struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name)
 {
         struct buffer_head *bh;
         struct gfs2_dirent *dent;
+        struct inode *inode;
+
+        dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
+        if (dent) {
+                if (IS_ERR(dent))
+                        return ERR_PTR(PTR_ERR(dent));
+                inode = gfs2_inode_lookup(dir->i_sb,
+                                          be64_to_cpu(dent->de_inum.no_addr),
+                                          be16_to_cpu(dent->de_type));
+                brelse(bh);
+                return inode;
+        }
+        return ERR_PTR(-ENOENT);
+}
+
+int gfs2_dir_check(struct inode *dir, const struct qstr *name,
+                   const struct gfs2_inode *ip)
+{
+        struct buffer_head *bh;
+        struct gfs2_dirent *dent;
+        int ret = -ENOENT;
 
         dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
         if (dent) {
                 if (IS_ERR(dent))
                         return PTR_ERR(dent);
-                if (inum)
-                        gfs2_inum_in(inum, (char *)&dent->de_inum);
-                if (type)
-                        *type = be16_to_cpu(dent->de_type);
+                if (ip) {
+                        if (be64_to_cpu(dent->de_inum.no_addr) != ip->i_no_addr)
+                                goto out;
+                        if (be64_to_cpu(dent->de_inum.no_formal_ino) !=
+                            ip->i_no_formal_ino)
+                                goto out;
+                        if (unlikely(IF2DT(ip->i_inode.i_mode) !=
+                            be16_to_cpu(dent->de_type))) {
+                                gfs2_consist_inode(GFS2_I(dir));
+                                ret = -EIO;
+                                goto out;
+                        }
+                }
+                ret = 0;
+out:
                 brelse(bh);
-                return 0;
         }
-        return -ENOENT;
+        return ret;
 }
 
 static int dir_new_leaf(struct inode *inode, const struct qstr *name)
@@ -1565,7 +1595,7 @@ static int dir_new_leaf(struct inode *inode, const struct qstr *name)
  */
 
 int gfs2_dir_add(struct inode *inode, const struct qstr *name,
-                 const struct gfs2_inum_host *inum, unsigned type)
+                 const struct gfs2_inode *nip, unsigned type)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
         struct buffer_head *bh;
@@ -1580,7 +1610,7 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name,
                         if (IS_ERR(dent))
                                 return PTR_ERR(dent);
                         dent = gfs2_init_dirent(inode, dent, name, bh);
-                        gfs2_inum_out(inum, (char *)&dent->de_inum);
+                        gfs2_inum_out(nip, dent);
                         dent->de_type = cpu_to_be16(type);
                         if (ip->i_di.di_flags & GFS2_DIF_EXHASH) {
                                 leaf = (struct gfs2_leaf *)bh->b_data;
@@ -1700,7 +1730,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
  */
 
 int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
-                   struct gfs2_inum_host *inum, unsigned int new_type)
+                   const struct gfs2_inode *nip, unsigned int new_type)
 {
         struct buffer_head *bh;
         struct gfs2_dirent *dent;
@@ -1715,7 +1745,7 @@ int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
                 return PTR_ERR(dent);
 
         gfs2_trans_add_bh(dip->i_gl, bh, 1);
-        gfs2_inum_out(inum, (char *)&dent->de_inum);
+        gfs2_inum_out(nip, dent);
         dent->de_type = cpu_to_be16(new_type);
 
         if (dip->i_di.di_flags & GFS2_DIF_EXHASH) {
diff --git a/fs/gfs2/dir.h b/fs/gfs2/dir.h
index 48fe89046bba..8a468cac9328 100644
--- a/fs/gfs2/dir.h
+++ b/fs/gfs2/dir.h
@@ -16,15 +16,16 @@ struct inode;
 struct gfs2_inode;
 struct gfs2_inum;
 
-int gfs2_dir_search(struct inode *dir, const struct qstr *filename,
-                    struct gfs2_inum_host *inum, unsigned int *type);
+struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *filename);
+int gfs2_dir_check(struct inode *dir, const struct qstr *filename,
+                   const struct gfs2_inode *ip);
 int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
-                 const struct gfs2_inum_host *inum, unsigned int type);
+                 const struct gfs2_inode *ip, unsigned int type);
 int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
 int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
                   filldir_t filldir);
 int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
-                   struct gfs2_inum_host *new_inum, unsigned int new_type);
+                   const struct gfs2_inode *nip, unsigned int new_type);
 
 int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
 
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index c66c718013ef..b3ed58551e74 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1823,8 +1823,8 @@ static int dump_inode(struct glock_iter *gi, struct gfs2_inode *ip)
 
         print_dbg(gi, "  Inode:\n");
         print_dbg(gi, "    num = %llu/%llu\n",
-                  (unsigned long long)ip->i_num.no_formal_ino,
-                  (unsigned long long)ip->i_num.no_addr);
+                  (unsigned long long)ip->i_no_formal_ino,
+                  (unsigned long long)ip->i_no_addr);
         print_dbg(gi, "    type = %u\n", IF2DT(ip->i_inode.i_mode));
         print_dbg(gi, "    i_flags =");
         for (x = 0; x < 32; x++)
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index d995441373ab..00c3004a4c22 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -213,8 +213,8 @@ enum {
 
 struct gfs2_inode {
         struct inode i_inode;
-        struct gfs2_inum_host i_num;
-
+        u64 i_no_addr;
+        u64 i_no_formal_ino;
         unsigned long i_flags;          /* GIF_... */
 
         struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index df0b8b3018b9..58f5a67e1c35 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -41,9 +41,9 @@
 static int iget_test(struct inode *inode, void *opaque)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
-        struct gfs2_inum_host *inum = opaque;
+        u64 *no_addr = opaque;
 
-        if (ip->i_num.no_addr == inum->no_addr &&
+        if (ip->i_no_addr == *no_addr &&
             inode->i_private != NULL)
                 return 1;
 
@@ -53,37 +53,37 @@ static int iget_test(struct inode *inode, void *opaque)
 static int iget_set(struct inode *inode, void *opaque)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
-        struct gfs2_inum_host *inum = opaque;
+        u64 *no_addr = opaque;
 
-        ip->i_num = *inum;
-        inode->i_ino = inum->no_addr;
+        inode->i_ino = (unsigned long)*no_addr;
+        ip->i_no_addr = *no_addr;
         return 0;
 }
 
-struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum)
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
 {
-        return ilookup5(sb, (unsigned long)inum->no_addr,
-                        iget_test, inum);
+        unsigned long hash = (unsigned long)no_addr;
+        return ilookup5(sb, hash, iget_test, &no_addr);
 }
 
-static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum_host *inum)
+static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
 {
-        return iget5_locked(sb, (unsigned long)inum->no_addr,
-                     iget_test, iget_set, inum);
+        unsigned long hash = (unsigned long)no_addr;
+        return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
 }
 
 /**
  * gfs2_inode_lookup - Lookup an inode
  * @sb: The super block
- * @inum: The inode number
+ * @no_addr: The inode number
  * @type: The type of the inode
  *
  * Returns: A VFS inode, or an error
  */
 
-struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *inum, unsigned int type)
+struct inode *gfs2_inode_lookup(struct super_block *sb, u64 no_addr, unsigned int type)
 {
-        struct inode *inode = gfs2_iget(sb, inum);
+        struct inode *inode = gfs2_iget(sb, no_addr);
         struct gfs2_inode *ip = GFS2_I(inode);
         struct gfs2_glock *io_gl;
         int error;
@@ -110,12 +110,12 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *i
                         inode->i_op = &gfs2_dev_iops;
                 }
 
-                error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
+                error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
                 if (unlikely(error))
                         goto fail;
                 ip->i_gl->gl_object = ip;
 
-                error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
+                error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
                 if (unlikely(error))
                         goto fail_put;
 
@@ -144,14 +144,12 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
         struct gfs2_dinode_host *di = &ip->i_di;
         const struct gfs2_dinode *str = buf;
 
-        if (ip->i_num.no_addr != be64_to_cpu(str->di_num.no_addr)) {
+        if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) {
                 if (gfs2_consist_inode(ip))
                         gfs2_dinode_print(ip);
                 return -EIO;
         }
-        if (ip->i_num.no_formal_ino != be64_to_cpu(str->di_num.no_formal_ino))
-                return -ESTALE;
-
+        ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
         ip->i_inode.i_rdev = 0;
         switch (ip->i_inode.i_mode & S_IFMT) {
@@ -247,7 +245,7 @@ int gfs2_dinode_dealloc(struct gfs2_inode *ip)
         if (error)
                 goto out_qs;
 
-        rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+        rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
         if (!rgd) {
                 gfs2_consist_inode(ip);
                 error = -EIO;
@@ -366,8 +364,6 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
         struct super_block *sb = dir->i_sb;
         struct gfs2_inode *dip = GFS2_I(dir);
         struct gfs2_holder d_gh;
-        struct gfs2_inum_host inum;
-        unsigned int type;
         int error;
         struct inode *inode = NULL;
         int unlock = 0;
@@ -395,12 +391,9 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
                         goto out;
         }
 
-        error = gfs2_dir_search(dir, name, &inum, &type);
-        if (error)
-                goto out;
-
-        inode = gfs2_inode_lookup(sb, &inum, type);
-
+        inode = gfs2_dir_search(dir, name);
+        if (IS_ERR(inode))
+                error = PTR_ERR(inode);
 out:
         if (unlock)
                 gfs2_glock_dq_uninit(&d_gh);
@@ -548,7 +541,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
         if (!dip->i_inode.i_nlink)
                 return -EPERM;
 
-        error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL);
+        error = gfs2_dir_check(&dip->i_inode, name, NULL);
         switch (error) {
         case -ENOENT:
                 error = 0;
@@ -588,8 +581,7 @@ static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
                 *gid = current->fsgid;
 }
 
-static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum,
-                        u64 *generation)
+static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
 {
         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
         int error;
@@ -605,7 +597,7 @@ static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum,
         if (error)
                 goto out_ipreserv;
 
-        inum->no_addr = gfs2_alloc_di(dip, generation);
+        *no_addr = gfs2_alloc_di(dip, generation);
 
         gfs2_trans_end(sdp);
 
@@ -760,7 +752,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
                         goto fail_quota_locks;
         }
 
-        error = gfs2_dir_add(&dip->i_inode, name, &ip->i_num, IF2DT(ip->i_inode.i_mode));
+        error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
         if (error)
                 goto fail_end_trans;
 
@@ -844,7 +836,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
         struct gfs2_inode *dip = ghs->gh_gl->gl_object;
         struct inode *dir = &dip->i_inode;
         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
-        struct gfs2_inum_host inum;
+        struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
         int error;
         u64 generation;
 
@@ -864,7 +856,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
         if (error)
                 goto fail_gunlock;
 
-        error = alloc_dinode(dip, &inum, &generation);
+        error = alloc_dinode(dip, &inum.no_addr, &generation);
         if (error)
                 goto fail_gunlock;
 
@@ -877,7 +869,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
         if (error)
                 goto fail_gunlock2;
 
-        inode = gfs2_inode_lookup(dir->i_sb, &inum, IF2DT(mode));
+        inode = gfs2_inode_lookup(dir->i_sb, inum.no_addr, IF2DT(mode));
         if (IS_ERR(inode))
                 goto fail_gunlock2;
 
@@ -976,10 +968,8 @@ int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
  */
 
 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
-                   struct gfs2_inode *ip)
+                   const struct gfs2_inode *ip)
 {
-        struct gfs2_inum_host inum;
-        unsigned int type;
         int error;
 
         if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
@@ -997,18 +987,10 @@ int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
         if (error)
                 return error;
 
-        error = gfs2_dir_search(&dip->i_inode, name, &inum, &type);
+        error = gfs2_dir_check(&dip->i_inode, name, ip);
         if (error)
                 return error;
 
-        if (!gfs2_inum_equal(&inum, &ip->i_num))
-                return -ENOENT;
-
-        if (IF2DT(ip->i_inode.i_mode) != type) {
-                gfs2_consist_inode(dip);
-                return -EIO;
-        }
-
         return 0;
 }
 
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index b57f448b15bc..05fc095d8540 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -10,17 +10,17 @@
 #ifndef __INODE_DOT_H__
 #define __INODE_DOT_H__
 
-static inline int gfs2_is_stuffed(struct gfs2_inode *ip)
+static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
 {
         return !ip->i_di.di_height;
 }
 
-static inline int gfs2_is_jdata(struct gfs2_inode *ip)
+static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
 {
         return ip->i_di.di_flags & GFS2_DIF_JDATA;
 }
 
-static inline int gfs2_is_dir(struct gfs2_inode *ip)
+static inline int gfs2_is_dir(const struct gfs2_inode *ip)
 {
         return S_ISDIR(ip->i_inode.i_mode);
 }
@@ -32,9 +32,15 @@ static inline void gfs2_set_inode_blocks(struct inode *inode)
                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
 }
 
+static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
+                                  u64 no_formal_ino)
+{
+        return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
+}
+
 void gfs2_inode_attr_in(struct gfs2_inode *ip);
-struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *inum, unsigned type);
-struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum);
+struct inode *gfs2_inode_lookup(struct super_block *sb, u64 no_addr, unsigned type);
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
 
 int gfs2_inode_refresh(struct gfs2_inode *ip);
 
@@ -47,7 +53,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
                 struct gfs2_inode *ip);
 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
-                   struct gfs2_inode *ip);
+                   const struct gfs2_inode *ip);
 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to);
 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
 int gfs2_glock_nq_atime(struct gfs2_holder *gh);
diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
index e037425bc042..527bf19d9690 100644
--- a/fs/gfs2/meta_io.h
+++ b/fs/gfs2/meta_io.h
@@ -63,7 +63,7 @@ int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
 static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
                                          struct buffer_head **bhp)
 {
-        return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
+        return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, 0, bhp);
 }
 
 struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
diff --git a/fs/gfs2/ondisk.c b/fs/gfs2/ondisk.c
index d9ecfd23a49e..cd4cf055c37d 100644
--- a/fs/gfs2/ondisk.c
+++ b/fs/gfs2/ondisk.c
@@ -33,26 +33,10 @@
  * first arg: the cpu-order structure
  */
 
-void gfs2_inum_in(struct gfs2_inum_host *no, const void *buf)
+void gfs2_inum_out(const struct gfs2_inode *ip, struct gfs2_dirent *dent)
 {
-        const struct gfs2_inum *str = buf;
-
-        no->no_formal_ino = be64_to_cpu(str->no_formal_ino);
-        no->no_addr = be64_to_cpu(str->no_addr);
-}
-
-void gfs2_inum_out(const struct gfs2_inum_host *no, void *buf)
-{
-        struct gfs2_inum *str = buf;
-
-        str->no_formal_ino = cpu_to_be64(no->no_formal_ino);
-        str->no_addr = cpu_to_be64(no->no_addr);
-}
-
-static void gfs2_inum_print(const struct gfs2_inum_host *no)
-{
-        printk(KERN_INFO "  no_formal_ino = %llu\n", (unsigned long long)no->no_formal_ino);
-        printk(KERN_INFO "  no_addr = %llu\n", (unsigned long long)no->no_addr);
+        dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
+        dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
 }
 
 static void gfs2_meta_header_in(struct gfs2_meta_header_host *mh, const void *buf)
@@ -74,9 +58,10 @@ void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
         sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
         sb->sb_bsize = be32_to_cpu(str->sb_bsize);
         sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
-
-        gfs2_inum_in(&sb->sb_master_dir, (char *)&str->sb_master_dir);
-        gfs2_inum_in(&sb->sb_root_dir, (char *)&str->sb_root_dir);
+        sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
+        sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
+        sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
+        sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
 
         memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
         memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
@@ -146,9 +131,8 @@ void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
         str->di_header.__pad0 = 0;
         str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
         str->di_header.__pad1 = 0;
-
-        gfs2_inum_out(&ip->i_num, &str->di_num);
-
+        str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
+        str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
         str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
         str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
         str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
@@ -178,7 +162,8 @@ void gfs2_dinode_print(const struct gfs2_inode *ip)
 {
         const struct gfs2_dinode_host *di = &ip->i_di;
 
-        gfs2_inum_print(&ip->i_num);
+        printk(KERN_INFO "  no_formal_ino = %llu\n", (unsigned long long)ip->i_no_formal_ino);
+        printk(KERN_INFO "  no_addr = %llu\n", (unsigned long long)ip->i_no_addr);
 
         printk(KERN_INFO "  di_size = %llu\n", (unsigned long long)di->di_size);
         printk(KERN_INFO "  di_blocks = %llu\n", (unsigned long long)di->di_blocks);
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 4913ef57b095..fb84478e1df6 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -757,8 +757,8 @@ static unsigned limit = 0;
                         return;
 
                 fs_warn(sdp, "ip = %llu %llu\n",
-                        (unsigned long long)ip->i_num.no_formal_ino,
-                        (unsigned long long)ip->i_num.no_addr);
+                        (unsigned long long)ip->i_no_formal_ino,
+                        (unsigned long long)ip->i_no_addr);
 
                 for (x = 0; x < GFS2_MAX_META_HEIGHT; x++)
                         fs_warn(sdp, "ip->i_cache[%u] = %s\n",
diff --git a/fs/gfs2/ops_dentry.c b/fs/gfs2/ops_dentry.c
index a6fdc52f554a..793e334d098e 100644
--- a/fs/gfs2/ops_dentry.c
+++ b/fs/gfs2/ops_dentry.c
@@ -21,6 +21,7 @@
 #include "glock.h"
 #include "ops_dentry.h"
 #include "util.h"
+#include "inode.h"
 
 /**
  * gfs2_drevalidate - Check directory lookup consistency
@@ -40,14 +41,15 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
         struct gfs2_inode *dip = GFS2_I(parent->d_inode);
         struct inode *inode = dentry->d_inode;
         struct gfs2_holder d_gh;
-        struct gfs2_inode *ip;
-        struct gfs2_inum_host inum;
-        unsigned int type;
+        struct gfs2_inode *ip = NULL;
         int error;
         int had_lock=0;
 
-        if (inode && is_bad_inode(inode))
-                goto invalid;
+        if (inode) {
+                if (is_bad_inode(inode))
+                        goto invalid;
+                ip = GFS2_I(inode);
+        }
 
         if (sdp->sd_args.ar_localcaching)
                 goto valid;
@@ -59,7 +61,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
                         goto fail;
         } 
 
-        error = gfs2_dir_search(parent->d_inode, &dentry->d_name, &inum, &type);
+        error = gfs2_dir_check(parent->d_inode, &dentry->d_name, ip);
         switch (error) {
         case 0:
                 if (!inode)
@@ -73,16 +75,6 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
                 goto fail_gunlock;
         }
 
-        ip = GFS2_I(inode);
-
-        if (!gfs2_inum_equal(&ip->i_num, &inum))
-                goto invalid_gunlock;
-
-        if (IF2DT(ip->i_inode.i_mode) != type) {
-                gfs2_consist_inode(dip);
-                goto fail_gunlock;
-        }
-
 valid_gunlock:
         if (!had_lock)
                 gfs2_glock_dq_uninit(&d_gh);
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index aad918337a46..51a8a14deb29 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -75,10 +75,10 @@ static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
             (connectable && *len < GFS2_LARGE_FH_SIZE))
                 return 255;
 
-        fh[0] = cpu_to_be32(ip->i_num.no_formal_ino >> 32);
-        fh[1] = cpu_to_be32(ip->i_num.no_formal_ino & 0xFFFFFFFF);
-        fh[2] = cpu_to_be32(ip->i_num.no_addr >> 32);
-        fh[3] = cpu_to_be32(ip->i_num.no_addr & 0xFFFFFFFF);
+        fh[0] = cpu_to_be32(ip->i_no_formal_ino >> 32);
+        fh[1] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF);
+        fh[2] = cpu_to_be32(ip->i_no_addr >> 32);
+        fh[3] = cpu_to_be32(ip->i_no_addr & 0xFFFFFFFF);
         *len = GFS2_SMALL_FH_SIZE;
 
         if (!connectable || inode == sb->s_root->d_inode)
@@ -90,10 +90,10 @@ static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
         igrab(inode);
         spin_unlock(&dentry->d_lock);
 
-        fh[4] = cpu_to_be32(ip->i_num.no_formal_ino >> 32);
-        fh[5] = cpu_to_be32(ip->i_num.no_formal_ino & 0xFFFFFFFF);
-        fh[6] = cpu_to_be32(ip->i_num.no_addr >> 32);
-        fh[7] = cpu_to_be32(ip->i_num.no_addr & 0xFFFFFFFF);
+        fh[4] = cpu_to_be32(ip->i_no_formal_ino >> 32);
+        fh[5] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF);
+        fh[6] = cpu_to_be32(ip->i_no_addr >> 32);
+        fh[7] = cpu_to_be32(ip->i_no_addr & 0xFFFFFFFF);
 
         fh[8]  = cpu_to_be32(inode->i_mode);
         fh[9]  = 0;     /* pad to double word */
@@ -144,7 +144,8 @@ static int gfs2_get_name(struct dentry *parent, char *name,
         ip = GFS2_I(inode);
 
         *name = 0;
-        gnfd.inum = ip->i_num;
+        gnfd.inum.no_addr = ip->i_no_addr;
+        gnfd.inum.no_formal_ino = ip->i_no_formal_ino;
         gnfd.name = name;
 
         error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &gh);
@@ -202,9 +203,9 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
 
         /* System files? */
 
-        inode = gfs2_ilookup(sb, inum);
+        inode = gfs2_ilookup(sb, inum->no_addr);
         if (inode) {
-                if (GFS2_I(inode)->i_num.no_formal_ino != inum->no_formal_ino) {
+                if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) {
                         iput(inode);
                         return ERR_PTR(-ESTALE);
                 }
@@ -236,7 +237,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
         gfs2_glock_dq_uninit(&rgd_gh);
         gfs2_glock_dq_uninit(&ri_gh);
 
-        inode = gfs2_inode_lookup(sb, inum, fh_obj->imode);
+        inode = gfs2_inode_lookup(sb, inum->no_addr, fh_obj->imode);
         if (!inode)
                 goto fail;
         if (IS_ERR(inode)) {
@@ -249,6 +250,10 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
                 iput(inode);
                 goto fail;
         }
+        if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) {
+                iput(inode);
+                goto fail;
+        }
 
         error = -EIO;
         if (GFS2_I(inode)->i_di.di_flags & GFS2_DIF_SYSTEM) {
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 064df8804582..550032c3b5f7 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -502,7 +502,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
         struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
         struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
         struct lm_lockname name =
-                { .ln_number = ip->i_num.no_addr,
+                { .ln_number = ip->i_no_addr,
                   .ln_type = LM_TYPE_PLOCK };
 
         if (!(fl->fl_flags & FL_POSIX))
@@ -557,7 +557,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
                 gfs2_glock_dq_uninit(fl_gh);
         } else {
                 error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
-                                      ip->i_num.no_addr, &gfs2_flock_glops,
+                                      ip->i_no_addr, &gfs2_flock_glops,
                                       CREATE, &gl);
                 if (error)
                         goto out;
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 2c5f8e7def0d..c682371717ff 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -236,17 +236,17 @@ fail:
         return error;
 }
 
-static struct inode *gfs2_lookup_root(struct super_block *sb,
-                                      struct gfs2_inum_host *inum)
+static inline struct inode *gfs2_lookup_root(struct super_block *sb,
+                                             u64 no_addr)
 {
-        return gfs2_inode_lookup(sb, inum, DT_DIR);
+        return gfs2_inode_lookup(sb, no_addr, DT_DIR);
 }
 
 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 {
         struct super_block *sb = sdp->sd_vfs;
         struct gfs2_holder sb_gh;
-        struct gfs2_inum_host *inum;
+        u64 no_addr;
         struct inode *inode;
         int error = 0;
 
@@ -289,10 +289,10 @@ static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 
         /* Get the root inode */
-        inum = &sdp->sd_sb.sb_root_dir;
+        no_addr = sdp->sd_sb.sb_root_dir.no_addr;
         if (sb->s_type == &gfs2meta_fs_type)
-                inum = &sdp->sd_sb.sb_master_dir;
-        inode = gfs2_lookup_root(sb, inum);
+                no_addr = sdp->sd_sb.sb_master_dir.no_addr;
+        inode = gfs2_lookup_root(sb, no_addr);
         if (IS_ERR(inode)) {
                 error = PTR_ERR(inode);
                 fs_err(sdp, "can't read in root inode: %d\n", error);
@@ -449,7 +449,7 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
         if (undo)
                 goto fail_qinode;
 
-        inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
+        inode = gfs2_lookup_root(sdp->sd_vfs, sdp->sd_sb.sb_master_dir.no_addr);
         if (IS_ERR(inode)) {
                 error = PTR_ERR(inode);
                 fs_err(sdp, "can't read in master directory: %d\n", error);
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index d85f6e05cb95..f8ecfec4064b 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -157,7 +157,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
         if (error)
                 goto out_gunlock;
 
-        error = gfs2_dir_search(dir, &dentry->d_name, NULL, NULL);
+        error = gfs2_dir_check(dir, &dentry->d_name, NULL);
         switch (error) {
         case -ENOENT:
                 break;
@@ -217,8 +217,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
                         goto out_ipres;
         }
 
-        error = gfs2_dir_add(dir, &dentry->d_name, &ip->i_num,
-                             IF2DT(inode->i_mode));
+        error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode));
         if (error)
                 goto out_end_trans;
 
@@ -275,7 +274,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
         gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
         gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, ghs + 1);
 
-        rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+        rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
         gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 
 
@@ -420,7 +419,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
                 dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
                 gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
 
-                gfs2_inum_out(&dip->i_num, &dent->de_inum);
+                gfs2_inum_out(dip, dent);
                 dent->de_type = cpu_to_be16(DT_DIR);
 
                 gfs2_dinode_out(ip, di);
@@ -472,7 +471,7 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
         gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
         gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
 
-        rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+        rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
         gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 
         error = gfs2_glock_nq_m(3, ghs);
@@ -614,7 +613,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                  * this is the case of the target file already existing
                  * so we unlink before doing the rename
                  */
-                nrgd = gfs2_blk2rgrpd(sdp, nip->i_num.no_addr);
+                nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
                 if (nrgd)
                         gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
         }
@@ -653,7 +652,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                 if (error)
                         goto out_gunlock;
 
-                error = gfs2_dir_search(ndir, &ndentry->d_name, NULL, NULL);
+                error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
                 switch (error) {
                 case -ENOENT:
                         error = 0;
@@ -750,7 +749,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                 if (error)
                         goto out_end_trans;
 
-                error = gfs2_dir_mvino(ip, &name, &ndip->i_num, DT_DIR);
+                error = gfs2_dir_mvino(ip, &name, nip, DT_DIR);
                 if (error)
                         goto out_end_trans;
         } else {
@@ -768,8 +767,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
         if (error)
                 goto out_end_trans;
 
-        error = gfs2_dir_add(ndir, &ndentry->d_name, &ip->i_num,
-                             IF2DT(ip->i_inode.i_mode));
+        error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
         if (error)
                 goto out_end_trans;
 
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index a62c0f2d26d3..30eb428065c5 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1470,7 +1470,7 @@ void gfs2_unlink_di(struct inode *inode)
         struct gfs2_inode *ip = GFS2_I(inode);
         struct gfs2_sbd *sdp = GFS2_SB(inode);
         struct gfs2_rgrpd *rgd;
-        u64 blkno = ip->i_num.no_addr;
+        u64 blkno = ip->i_no_addr;
 
         rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED);
         if (!rgd)
@@ -1505,9 +1505,9 @@ static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno)
 
 void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
 {
-        gfs2_free_uninit_di(rgd, ip->i_num.no_addr);
+        gfs2_free_uninit_di(rgd, ip->i_no_addr);
         gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid);
-        gfs2_meta_wipe(ip, ip->i_num.no_addr, 1);
+        gfs2_meta_wipe(ip, ip->i_no_addr, 1);
 }
 
 /**
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 4fdda974dc83..faccffd19907 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -360,7 +360,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
                 name.len = sprintf(buf, "journal%u", sdp->sd_journals);
                 name.hash = gfs2_disk_hash(name.name, name.len);
 
-                error = gfs2_dir_search(sdp->sd_jindex, &name, NULL, NULL);
+                error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
                 if (error == -ENOENT) {
                         error = 0;
                         break;
diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
index 601eaa1b9ed6..3f5edc54e80a 100644
--- a/fs/gfs2/util.c
+++ b/fs/gfs2/util.c
@@ -115,8 +115,8 @@ int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
                 "GFS2: fsid=%s:   inode = %llu %llu\n"
                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
                 sdp->sd_fsname,
-                sdp->sd_fsname, (unsigned long long)ip->i_num.no_formal_ino,
-                (unsigned long long)ip->i_num.no_addr,
+                sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
+                (unsigned long long)ip->i_no_addr,
                 sdp->sd_fsname, function, file, line);
         return rv;
 }