[XFS] sanitize xfs_initialize_vnode

Sanitize setting up the Linux indode.

Setting up the xfs_inode <-> inode link is opencoded in xfs_iget_core now
because that's the only place it needs to be done, xfs_initialize_vnode is
renamed to xfs_setup_inode and loses all superflous paramaters. The check
for I_NEW is removed because it always is true and the di_mode check moves
into xfs_iget_core because it's only needed there.

xfs_set_inodeops and xfs_revalidate_inode are merged into xfs_setup_inode
and the whole things is moved into xfs_iops.c where it belongs.

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31782a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

6 files changed, 111 insertions, 126 deletions

diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index cc0f21af48fe..ace56bd3a5fb 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -710,7 +710,7 @@ out_error:
         return error;
 }
 
-const struct inode_operations xfs_inode_operations = {
+static const struct inode_operations xfs_inode_operations = {
         .permission             = xfs_vn_permission,
         .truncate               = xfs_vn_truncate,
         .getattr                = xfs_vn_getattr,
@@ -722,7 +722,7 @@ const struct inode_operations xfs_inode_operations = {
         .fallocate              = xfs_vn_fallocate,
 };
 
-const struct inode_operations xfs_dir_inode_operations = {
+static const struct inode_operations xfs_dir_inode_operations = {
         .create                 = xfs_vn_create,
         .lookup                 = xfs_vn_lookup,
         .link                   = xfs_vn_link,
@@ -747,7 +747,7 @@ const struct inode_operations xfs_dir_inode_operations = {
         .listxattr              = xfs_vn_listxattr,
 };
 
-const struct inode_operations xfs_dir_ci_inode_operations = {
+static const struct inode_operations xfs_dir_ci_inode_operations = {
         .create                 = xfs_vn_create,
         .lookup                 = xfs_vn_ci_lookup,
         .link                   = xfs_vn_link,
@@ -772,7 +772,7 @@ const struct inode_operations xfs_dir_ci_inode_operations = {
         .listxattr              = xfs_vn_listxattr,
 };
 
-const struct inode_operations xfs_symlink_inode_operations = {
+static const struct inode_operations xfs_symlink_inode_operations = {
         .readlink               = generic_readlink,
         .follow_link            = xfs_vn_follow_link,
         .put_link               = xfs_vn_put_link,
@@ -784,3 +784,98 @@ const struct inode_operations xfs_symlink_inode_operations = {
         .removexattr            = generic_removexattr,
         .listxattr              = xfs_vn_listxattr,
 };
+
+STATIC void
+xfs_diflags_to_iflags(
+        struct inode            *inode,
+        struct xfs_inode        *ip)
+{
+        if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
+                inode->i_flags |= S_IMMUTABLE;
+        else
+                inode->i_flags &= ~S_IMMUTABLE;
+        if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
+                inode->i_flags |= S_APPEND;
+        else
+                inode->i_flags &= ~S_APPEND;
+        if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
+                inode->i_flags |= S_SYNC;
+        else
+                inode->i_flags &= ~S_SYNC;
+        if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
+                inode->i_flags |= S_NOATIME;
+        else
+                inode->i_flags &= ~S_NOATIME;
+}
+
+/*
+ * Initialize the Linux inode, set up the operation vectors and
+ * unlock the inode.
+ *
+ * When reading existing inodes from disk this is called directly
+ * from xfs_iget, when creating a new inode it is called from
+ * xfs_ialloc after setting up the inode.
+ */
+void
+xfs_setup_inode(
+        struct xfs_inode        *ip)
+{
+        struct inode            *inode = ip->i_vnode;
+
+        inode->i_mode   = ip->i_d.di_mode;
+        inode->i_nlink  = ip->i_d.di_nlink;
+        inode->i_uid    = ip->i_d.di_uid;
+        inode->i_gid    = ip->i_d.di_gid;
+
+        switch (inode->i_mode & S_IFMT) {
+        case S_IFBLK:
+        case S_IFCHR:
+                inode->i_rdev =
+                        MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
+                              sysv_minor(ip->i_df.if_u2.if_rdev));
+                break;
+        default:
+                inode->i_rdev = 0;
+                break;
+        }
+
+        inode->i_generation = ip->i_d.di_gen;
+        i_size_write(inode, ip->i_d.di_size);
+        inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
+        inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
+        inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
+        inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
+        inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
+        inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
+        xfs_diflags_to_iflags(inode, ip);
+        xfs_iflags_clear(ip, XFS_IMODIFIED);
+
+        switch (inode->i_mode & S_IFMT) {
+        case S_IFREG:
+                inode->i_op = &xfs_inode_operations;
+                inode->i_fop = &xfs_file_operations;
+                inode->i_mapping->a_ops = &xfs_address_space_operations;
+                break;
+        case S_IFDIR:
+                if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
+                        inode->i_op = &xfs_dir_ci_inode_operations;
+                else
+                        inode->i_op = &xfs_dir_inode_operations;
+                inode->i_fop = &xfs_dir_file_operations;
+                break;
+        case S_IFLNK:
+                inode->i_op = &xfs_symlink_inode_operations;
+                if (!(ip->i_df.if_flags & XFS_IFINLINE))
+                        inode->i_mapping->a_ops = &xfs_address_space_operations;
+                break;
+        default:
+                inode->i_op = &xfs_inode_operations;
+                init_special_inode(inode, inode->i_mode, inode->i_rdev);
+                break;
+        }
+
+        xfs_iflags_clear(ip, XFS_INEW);
+        barrier();
+
+        unlock_new_inode(inode);
+}
diff --git a/fs/xfs/linux-2.6/xfs_iops.h b/fs/xfs/linux-2.6/xfs_iops.h
index fdda404bc343..2204f466dee0 100644
--- a/fs/xfs/linux-2.6/xfs_iops.h
+++ b/fs/xfs/linux-2.6/xfs_iops.h
@@ -18,10 +18,7 @@
 #ifndef __XFS_IOPS_H__
 #define __XFS_IOPS_H__
 
-extern const struct inode_operations xfs_inode_operations;
-extern const struct inode_operations xfs_dir_inode_operations;
-extern const struct inode_operations xfs_dir_ci_inode_operations;
-extern const struct inode_operations xfs_symlink_inode_operations;
+struct xfs_inode;
 
 extern const struct file_operations xfs_file_operations;
 extern const struct file_operations xfs_dir_file_operations;
@@ -29,8 +26,9 @@ extern const struct file_operations xfs_invis_file_operations;
 
 extern ssize_t xfs_vn_listxattr(struct dentry *, char *data, size_t size);
 
-struct xfs_inode;
 extern void xfs_ichgtime(struct xfs_inode *, int);
 extern void xfs_ichgtime_fast(struct xfs_inode *, struct inode *, int);
 
+extern void xfs_setup_inode(struct xfs_inode *);
+
 #endif /* __XFS_IOPS_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 7605b071dc88..0eaad84a6803 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -581,116 +581,6 @@ xfs_max_file_offset(
         return (((__uint64_t)pagefactor) << bitshift) - 1;
 }
 
-STATIC_INLINE void
-xfs_set_inodeops(
-        struct inode            *inode)
-{
-        switch (inode->i_mode & S_IFMT) {
-        case S_IFREG:
-                inode->i_op = &xfs_inode_operations;
-                inode->i_fop = &xfs_file_operations;
-                inode->i_mapping->a_ops = &xfs_address_space_operations;
-                break;
-        case S_IFDIR:
-                if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
-                        inode->i_op = &xfs_dir_ci_inode_operations;
-                else
-                        inode->i_op = &xfs_dir_inode_operations;
-                inode->i_fop = &xfs_dir_file_operations;
-                break;
-        case S_IFLNK:
-                inode->i_op = &xfs_symlink_inode_operations;
-                if (!(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE))
-                        inode->i_mapping->a_ops = &xfs_address_space_operations;
-                break;
-        default:
-                inode->i_op = &xfs_inode_operations;
-                init_special_inode(inode, inode->i_mode, inode->i_rdev);
-                break;
-        }
-}
-
-STATIC_INLINE void
-xfs_revalidate_inode(
-        xfs_mount_t             *mp,
-        struct inode            *inode,
-        xfs_inode_t             *ip)
-{
-
-        inode->i_mode   = ip->i_d.di_mode;
-        inode->i_nlink  = ip->i_d.di_nlink;
-        inode->i_uid    = ip->i_d.di_uid;
-        inode->i_gid    = ip->i_d.di_gid;
-
-        switch (inode->i_mode & S_IFMT) {
-        case S_IFBLK:
-        case S_IFCHR:
-                inode->i_rdev =
-                        MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
-                              sysv_minor(ip->i_df.if_u2.if_rdev));
-                break;
-        default:
-                inode->i_rdev = 0;
-                break;
-        }
-
-        inode->i_generation = ip->i_d.di_gen;
-        i_size_write(inode, ip->i_d.di_size);
-        inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
-        inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
-        inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
-        inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
-        inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
-        inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
-        if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
-                inode->i_flags |= S_IMMUTABLE;
-        else
-                inode->i_flags &= ~S_IMMUTABLE;
-        if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
-                inode->i_flags |= S_APPEND;
-        else
-                inode->i_flags &= ~S_APPEND;
-        if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
-                inode->i_flags |= S_SYNC;
-        else
-                inode->i_flags &= ~S_SYNC;
-        if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
-                inode->i_flags |= S_NOATIME;
-        else
-                inode->i_flags &= ~S_NOATIME;
-        xfs_iflags_clear(ip, XFS_IMODIFIED);
-}
-
-void
-xfs_initialize_vnode(
-        struct xfs_mount        *mp,
-        struct inode            *inode,
-        struct xfs_inode        *ip)
-{
-
-        if (!ip->i_vnode) {
-                ip->i_vnode = inode;
-                inode->i_private = ip;
-        }
-
-        /*
-         * We need to set the ops vectors, and unlock the inode, but if
-         * we have been called during the new inode create process, it is
-         * too early to fill in the Linux inode.  We will get called a
-         * second time once the inode is properly set up, and then we can
-         * finish our work.
-         */
-        if (ip->i_d.di_mode != 0 && (inode->i_state & I_NEW)) {
-                xfs_revalidate_inode(mp, inode, ip);
-                xfs_set_inodeops(inode);
-
-                xfs_iflags_clear(ip, XFS_INEW);
-                barrier();
-
-                unlock_new_inode(inode);
-        }
-}
-
 int
 xfs_blkdev_get(
         xfs_mount_t             *mp,
diff --git a/fs/xfs/linux-2.6/xfs_super.h b/fs/xfs/linux-2.6/xfs_super.h
index 57145fff3850..fe2ef4e6a0f9 100644
--- a/fs/xfs/linux-2.6/xfs_super.h
+++ b/fs/xfs/linux-2.6/xfs_super.h
@@ -101,9 +101,6 @@ struct block_device;
 
 extern __uint64_t xfs_max_file_offset(unsigned int);
 
-extern void xfs_initialize_vnode(struct xfs_mount *mp, struct inode *vp,
-                struct xfs_inode *ip);
-
 extern void xfs_flush_inode(struct xfs_inode *);
 extern void xfs_flush_device(struct xfs_inode *);
 
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index d44342640ca3..539c2dd8eae8 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -288,10 +288,17 @@ finish_inode:
         *ipp = ip;
 
         /*
+         * Set up the Linux with the Linux inode.
+         */
+        ip->i_vnode = inode;
+        inode->i_private = ip;
+
+        /*
          * If we have a real type for an on-disk inode, we can set ops(&unlock)
          * now.  If it's a new inode being created, xfs_ialloc will handle it.
          */
-        xfs_initialize_vnode(mp, inode, ip);
+        if (ip->i_d.di_mode != 0)
+                xfs_setup_inode(ip);
         return 0;
 }
 
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 19e7a7b82703..5bb638b445e8 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1046,7 +1046,6 @@ xfs_ialloc(
 {
         xfs_ino_t       ino;
         xfs_inode_t     *ip;
-        struct inode    *vp;
         uint            flags;
         int             error;
 
@@ -1077,7 +1076,6 @@ xfs_ialloc(
         }
         ASSERT(ip != NULL);
 
-        vp = VFS_I(ip);
         ip->i_d.di_mode = (__uint16_t)mode;
         ip->i_d.di_onlink = 0;
         ip->i_d.di_nlink = nlink;
@@ -1220,7 +1218,7 @@ xfs_ialloc(
         xfs_trans_log_inode(tp, ip, flags);
 
         /* now that we have an i_mode we can setup inode ops and unlock */
-        xfs_initialize_vnode(tp->t_mountp, vp, ip);
+        xfs_setup_inode(ip);
 
         *ipp = ip;
         return 0;