[XFS] Remove vn_revalidate calls in xfs.

These days most of the attributes in struct inode are properly kept in
sync by XFS. This patch removes the need for vn_revalidate completely by:

- keeping inode.i_flags uptodate after any flags are updated in

xfs_ioctl_setattr

- keeping i_mode, i_uid and i_gid uptodate in xfs_setattr

SGI-PV: 984566

SGI-Modid: xfs-linux-melb:xfs-kern:31679a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

6 files changed, 39 insertions, 73 deletions

diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index d1b0da6bcdca..acb978d9d085 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -923,6 +923,30 @@ xfs_set_diflags(
         ip->i_d.di_flags = di_flags;
 }
 
+STATIC void
+xfs_diflags_to_linux(
+        struct xfs_inode        *ip)
+{
+        struct inode            *inode = XFS_ITOV(ip);
+        unsigned int            xflags = xfs_ip2xflags(ip);
+
+        if (xflags & XFS_XFLAG_IMMUTABLE)
+                inode->i_flags |= S_IMMUTABLE;
+        else
+                inode->i_flags &= ~S_IMMUTABLE;
+        if (xflags & XFS_XFLAG_APPEND)
+                inode->i_flags |= S_APPEND;
+        else
+                inode->i_flags &= ~S_APPEND;
+        if (xflags & XFS_XFLAG_SYNC)
+                inode->i_flags |= S_SYNC;
+        else
+                inode->i_flags &= ~S_SYNC;
+        if (xflags & XFS_XFLAG_NOATIME)
+                inode->i_flags |= S_NOATIME;
+        else
+                inode->i_flags &= ~S_NOATIME;
+}
 
 #define FSX_PROJID      1
 #define FSX_EXTSIZE     2
@@ -1121,8 +1145,10 @@ xfs_ioctl_setattr(
 
         if (mask & FSX_EXTSIZE)
                 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
-        if (mask & FSX_XFLAGS)
+        if (mask & FSX_XFLAGS) {
                 xfs_set_diflags(ip, fa->fsx_xflags);
+                xfs_diflags_to_linux(ip);
+        }
 
         xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
         xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
@@ -1160,7 +1186,6 @@ xfs_ioctl_setattr(
                                 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
         }
 
-        vn_revalidate(XFS_ITOV(ip));    /* update flags */
         return 0;
 
  error_return:
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 669bbdc20857..e88f51028086 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -650,21 +650,7 @@ xfs_vn_setattr(
         struct dentry   *dentry,
         struct iattr    *iattr)
 {
-        struct inode    *inode = dentry->d_inode;
-        int             error;
-
-        if (iattr->ia_valid & ATTR_ATIME)
-                inode->i_atime = iattr->ia_atime;
-
-        if (iattr->ia_valid & ATTR_MODE) {
-                if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
-                        inode->i_mode &= ~S_ISGID;
-        }
-
-        error = xfs_setattr(XFS_I(inode), iattr, 0, NULL);
-        if (likely(!error))
-                vn_revalidate(vn_from_inode(inode));
-        return -error;
+        return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0, NULL);
 }
 
 /*
diff --git a/fs/xfs/linux-2.6/xfs_vnode.c b/fs/xfs/linux-2.6/xfs_vnode.c
index bc7afe007338..25488b6d9881 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.c
+++ b/fs/xfs/linux-2.6/xfs_vnode.c
@@ -82,56 +82,6 @@ vn_ioerror(
                 xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, f, l);
 }
 
-/*
- * Revalidate the Linux inode from the XFS inode.
- * Note: i_size _not_ updated; we must hold the inode
- * semaphore when doing that - callers responsibility.
- */
-int
-vn_revalidate(
-        bhv_vnode_t             *vp)
-{
-        struct inode            *inode = vn_to_inode(vp);
-        struct xfs_inode        *ip = XFS_I(inode);
-        struct xfs_mount        *mp = ip->i_mount;
-        unsigned long           xflags;
-
-        xfs_itrace_entry(ip);
-
-        if (XFS_FORCED_SHUTDOWN(mp))
-                return -EIO;
-
-        xfs_ilock(ip, XFS_ILOCK_SHARED);
-        inode->i_mode       = ip->i_d.di_mode;
-        inode->i_uid        = ip->i_d.di_uid;
-        inode->i_gid        = ip->i_d.di_gid;
-        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;
-
-        xflags = xfs_ip2xflags(ip);
-        if (xflags & XFS_XFLAG_IMMUTABLE)
-                inode->i_flags |= S_IMMUTABLE;
-        else
-                inode->i_flags &= ~S_IMMUTABLE;
-        if (xflags & XFS_XFLAG_APPEND)
-                inode->i_flags |= S_APPEND;
-        else
-                inode->i_flags &= ~S_APPEND;
-        if (xflags & XFS_XFLAG_SYNC)
-                inode->i_flags |= S_SYNC;
-        else
-                inode->i_flags &= ~S_SYNC;
-        if (xflags & XFS_XFLAG_NOATIME)
-                inode->i_flags |= S_NOATIME;
-        else
-                inode->i_flags &= ~S_NOATIME;
-        xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
-        xfs_iflags_clear(ip, XFS_IMODIFIED);
-        return 0;
-}
 
 /*
  * Add a reference to a referenced vnode.
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index 96e4a7b5391c..41ca2cec5d31 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -67,7 +67,6 @@ static inline struct inode *vn_to_inode(bhv_vnode_t *vnode)
 
 
 extern void     vn_init(void);
-extern int      vn_revalidate(bhv_vnode_t *);
 
 /*
  * Yeah, these don't take vnode anymore at all, all this should be
diff --git a/fs/xfs/linux-2.6/xfs_xattr.c b/fs/xfs/linux-2.6/xfs_xattr.c
index b4acb68fc9f7..964621fde6ed 100644
--- a/fs/xfs/linux-2.6/xfs_xattr.c
+++ b/fs/xfs/linux-2.6/xfs_xattr.c
@@ -64,7 +64,7 @@ static int
 xfs_xattr_system_set(struct inode *inode, const char *name,
                 const void *value, size_t size, int flags)
 {
-        int error, acl;
+        int acl;
 
         acl = xfs_decode_acl(name);
         if (acl < 0)
@@ -75,10 +75,7 @@ xfs_xattr_system_set(struct inode *inode, const char *name,
         if (!value)
                 return xfs_acl_vremove(inode, acl);
 
-        error = xfs_acl_vset(inode, (void *)value, size, acl);
-        if (!error)
-                vn_revalidate(inode);
-        return error;
+        return xfs_acl_vset(inode, (void *)value, size, acl);
 }
 
 static struct xattr_handler xfs_xattr_system_handler = {
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index b792a121b1a7..76a1166af822 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -83,6 +83,7 @@ xfs_setattr(
         cred_t                  *credp)
 {
         xfs_mount_t             *mp = ip->i_mount;
+        struct inode            *inode = XFS_ITOV(ip);
         int                     mask = iattr->ia_valid;
         xfs_trans_t             *tp;
         int                     code;
@@ -446,6 +447,9 @@ xfs_setattr(
                 ip->i_d.di_mode &= S_IFMT;
                 ip->i_d.di_mode |= iattr->ia_mode & ~S_IFMT;
 
+                inode->i_mode &= S_IFMT;
+                inode->i_mode |= iattr->ia_mode & ~S_IFMT;
+
                 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
                 timeflags |= XFS_ICHGTIME_CHG;
         }
@@ -481,6 +485,7 @@ xfs_setattr(
                                                         &ip->i_udquot, udqp);
                         }
                         ip->i_d.di_uid = uid;
+                        inode->i_uid = uid;
                 }
                 if (igid != gid) {
                         if (XFS_IS_GQUOTA_ON(mp)) {
@@ -491,6 +496,7 @@ xfs_setattr(
                                                         &ip->i_gdquot, gdqp);
                         }
                         ip->i_d.di_gid = gid;
+                        inode->i_gid = gid;
                 }
 
                 xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE);
@@ -503,12 +509,14 @@ xfs_setattr(
          */
         if (mask & (ATTR_ATIME|ATTR_MTIME)) {
                 if (mask & ATTR_ATIME) {
+                        inode->i_atime = iattr->ia_atime;
                         ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
                         ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
                         ip->i_update_core = 1;
                         timeflags &= ~XFS_ICHGTIME_ACC;
                 }
                 if (mask & ATTR_MTIME) {
+                        inode->i_mtime = iattr->ia_mtime;
                         ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
                         ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
                         timeflags &= ~XFS_ICHGTIME_MOD;
@@ -524,6 +532,7 @@ xfs_setattr(
          */
 
         if ((flags & XFS_ATTR_DMI) && (mask & ATTR_CTIME)) {
+                inode->i_ctime = iattr->ia_ctime;
                 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
                 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
                 ip->i_update_core = 1;