[GFS2] Remove support for unused and pointless flag
Steven Whitehouse [Thu, 10 Jul 2008 15:09:29 +0000 (16:09 +0100)]
The ability to mark files for direct i/o access when opened
normally is both unused and pointless, so this patch removes
support for that feature.

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

fs/gfs2/incore.h
fs/gfs2/inode.c
fs/gfs2/ops_file.c
fs/gfs2/super.c
fs/gfs2/sys.c

index 4ab3c3a..448697a 100644 (file)
@@ -421,7 +421,6 @@ struct gfs2_tune {
        unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
        unsigned int gt_atime_quantum; /* Min secs between atime updates */
        unsigned int gt_new_files_jdata;
-       unsigned int gt_new_files_directio;
        unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
        unsigned int gt_stall_secs; /* Detects trouble! */
        unsigned int gt_complain_secs;
index caf4090..6da0ab3 100644 (file)
@@ -789,13 +789,8 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
                if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
                    gfs2_tune_get(sdp, gt_new_files_jdata))
                        di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
-               if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
-                   gfs2_tune_get(sdp, gt_new_files_directio))
-                       di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
        } else if (S_ISDIR(mode)) {
                di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
-                                           GFS2_DIF_INHERIT_DIRECTIO);
-               di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
                                            GFS2_DIF_INHERIT_JDATA);
        }
 
index 1737af9..21b397d 100644 (file)
@@ -134,7 +134,6 @@ static const u32 fsflags_to_gfs2[32] = {
        [7] = GFS2_DIF_NOATIME,
        [12] = GFS2_DIF_EXHASH,
        [14] = GFS2_DIF_INHERIT_JDATA,
-       [20] = GFS2_DIF_INHERIT_DIRECTIO,
 };
 
 static const u32 gfs2_to_fsflags[32] = {
@@ -143,7 +142,6 @@ static const u32 gfs2_to_fsflags[32] = {
        [gfs2fl_AppendOnly] = FS_APPEND_FL,
        [gfs2fl_NoAtime] = FS_NOATIME_FL,
        [gfs2fl_ExHash] = FS_INDEX_FL,
-       [gfs2fl_InheritDirectio] = FS_DIRECTIO_FL,
        [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
 };
 
@@ -161,12 +159,8 @@ static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
                return error;
 
        fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags);
-       if (!S_ISDIR(inode->i_mode)) {
-               if (ip->i_di.di_flags & GFS2_DIF_JDATA)
-                       fsflags |= FS_JOURNAL_DATA_FL;
-               if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
-                       fsflags |= FS_DIRECTIO_FL;
-       }
+       if (!S_ISDIR(inode->i_mode) && ip->i_di.di_flags & GFS2_DIF_JDATA)
+               fsflags |= FS_JOURNAL_DATA_FL;
        if (put_user(fsflags, ptr))
                error = -EFAULT;
 
@@ -195,13 +189,11 @@ void gfs2_set_inode_flags(struct inode *inode)
 
 /* Flags that can be set by user space */
 #define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA|                   \
-                            GFS2_DIF_DIRECTIO|                 \
                             GFS2_DIF_IMMUTABLE|                \
                             GFS2_DIF_APPENDONLY|               \
                             GFS2_DIF_NOATIME|                  \
                             GFS2_DIF_SYNC|                     \
                             GFS2_DIF_SYSTEM|                   \
-                            GFS2_DIF_INHERIT_DIRECTIO|         \
                             GFS2_DIF_INHERIT_JDATA)
 
 /**
@@ -292,8 +284,6 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
        if (!S_ISDIR(inode->i_mode)) {
                if (gfsflags & GFS2_DIF_INHERIT_JDATA)
                        gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
-               if (gfsflags & GFS2_DIF_INHERIT_DIRECTIO)
-                       gfsflags ^= (GFS2_DIF_DIRECTIO | GFS2_DIF_INHERIT_DIRECTIO);
                return do_gfs2_set_flags(filp, gfsflags, ~0);
        }
        return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA);
@@ -494,11 +484,6 @@ static int gfs2_open(struct inode *inode, struct file *file)
                        goto fail_gunlock;
                }
 
-               /* Listen to the Direct I/O flag */
-
-               if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
-                       file->f_flags |= O_DIRECT;
-
                gfs2_glock_dq_uninit(&i_gh);
        }
 
index 12fe38f..63a8a90 100644 (file)
@@ -65,7 +65,6 @@ void gfs2_tune_init(struct gfs2_tune *gt)
        gt->gt_quota_quantum = 60;
        gt->gt_atime_quantum = 3600;
        gt->gt_new_files_jdata = 0;
-       gt->gt_new_files_directio = 0;
        gt->gt_max_readahead = 1 << 18;
        gt->gt_stall_secs = 600;
        gt->gt_complain_secs = 10;
index 6f7e2e5..7484655 100644 (file)
@@ -412,7 +412,6 @@ TUNE_ATTR(max_readahead, 0);
 TUNE_ATTR(complain_secs, 0);
 TUNE_ATTR(statfs_slow, 0);
 TUNE_ATTR(new_files_jdata, 0);
-TUNE_ATTR(new_files_directio, 0);
 TUNE_ATTR(quota_simul_sync, 1);
 TUNE_ATTR(quota_cache_secs, 1);
 TUNE_ATTR(stall_secs, 1);
@@ -441,7 +440,6 @@ static struct attribute *tune_attrs[] = {
        &tune_attr_quotad_secs.attr,
        &tune_attr_quota_scale.attr,
        &tune_attr_new_files_jdata.attr,
-       &tune_attr_new_files_directio.attr,
        NULL,
 };