[XFS] Add degframentation exclusion support

SGI-PV: 953061
SGI-Modid: xfs-linux-melb:xfs-kern:25986a

Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

8 files changed, 20 insertions, 1 deletions

diff --git a/fs/xfs/linux-2.6/xfs_globals.c b/fs/xfs/linux-2.6/xfs_globals.c
index 6e8085f34635..6c162c3dde7e 100644
--- a/fs/xfs/linux-2.6/xfs_globals.c
+++ b/fs/xfs/linux-2.6/xfs_globals.c
@@ -45,6 +45,7 @@ xfs_param_t xfs_params = {
         .xfs_buf_age    = {     1*100,          15*100,         7200*100},
         .inherit_nosym  = {     0,              0,              1       },
         .rotorstep      = {     1,              1,              255     },
+        .inherit_nodfrg = {     0,              1,              1       },
 };
 
 /*
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index e9fe43d74768..7d15cb910275 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -134,6 +134,7 @@ BUFFER_FNS(PrivateStart, unwritten);
 #define xfs_buf_age_centisecs   xfs_params.xfs_buf_age.val
 #define xfs_inherit_nosymlinks  xfs_params.inherit_nosym.val
 #define xfs_rotorstep           xfs_params.rotorstep.val
+#define xfs_inherit_nodefrag    xfs_params.inherit_nodfrg.val
 
 #ifndef raw_smp_processor_id
 #define raw_smp_processor_id()  smp_processor_id()
diff --git a/fs/xfs/linux-2.6/xfs_sysctl.c b/fs/xfs/linux-2.6/xfs_sysctl.c
index 7079cc837210..4af97682bec8 100644
--- a/fs/xfs/linux-2.6/xfs_sysctl.c
+++ b/fs/xfs/linux-2.6/xfs_sysctl.c
@@ -120,6 +120,11 @@ STATIC ctl_table xfs_table[] = {
         &sysctl_intvec, NULL,
         &xfs_params.rotorstep.min, &xfs_params.rotorstep.max},
 
+        {XFS_INHERIT_NODFRG, "inherit_nodefrag", &xfs_params.inherit_nodfrg.val,
+        sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+        &sysctl_intvec, NULL,
+        &xfs_params.inherit_nodfrg.min, &xfs_params.inherit_nodfrg.max},
+
         /* please keep this the last entry */
 #ifdef CONFIG_PROC_FS
         {XFS_STATS_CLEAR, "stats_clear", &xfs_params.stats_clear.val,
diff --git a/fs/xfs/linux-2.6/xfs_sysctl.h b/fs/xfs/linux-2.6/xfs_sysctl.h
index bc8c11f13722..a631fb8cc5ac 100644
--- a/fs/xfs/linux-2.6/xfs_sysctl.h
+++ b/fs/xfs/linux-2.6/xfs_sysctl.h
@@ -46,6 +46,7 @@ typedef struct xfs_param {
         xfs_sysctl_val_t xfs_buf_age;   /* Metadata buffer age before flush. */
         xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
         xfs_sysctl_val_t rotorstep;     /* inode32 AG rotoring control knob */
+        xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
 } xfs_param_t;
 
 /*
@@ -84,6 +85,7 @@ enum {
         /* XFS_IO_BYPASS = 18 */
         XFS_INHERIT_NOSYM = 19,
         XFS_ROTORSTEP = 20,
+        XFS_INHERIT_NODFRG = 21,
 };
 
 extern xfs_param_t      xfs_params;
diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h
index 79d0d9e1fbab..77d537782586 100644
--- a/fs/xfs/xfs_dinode.h
+++ b/fs/xfs/xfs_dinode.h
@@ -257,6 +257,7 @@ typedef enum xfs_dinode_fmt
 #define XFS_DIFLAG_NOSYMLINKS_BIT   10  /* disallow symlink creation */
 #define XFS_DIFLAG_EXTSIZE_BIT      11  /* inode extent size allocator hint */
 #define XFS_DIFLAG_EXTSZINHERIT_BIT 12  /* inherit inode extent size */
+#define XFS_DIFLAG_NODEFRAG_BIT     13  /* do not reorganize/defragment */
 #define XFS_DIFLAG_REALTIME      (1 << XFS_DIFLAG_REALTIME_BIT)
 #define XFS_DIFLAG_PREALLOC      (1 << XFS_DIFLAG_PREALLOC_BIT)
 #define XFS_DIFLAG_NEWRTBM       (1 << XFS_DIFLAG_NEWRTBM_BIT)
@@ -270,12 +271,13 @@ typedef enum xfs_dinode_fmt
 #define XFS_DIFLAG_NOSYMLINKS    (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
 #define XFS_DIFLAG_EXTSIZE       (1 << XFS_DIFLAG_EXTSIZE_BIT)
 #define XFS_DIFLAG_EXTSZINHERIT  (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
+#define XFS_DIFLAG_NODEFRAG      (1 << XFS_DIFLAG_NODEFRAG_BIT)
 
 #define XFS_DIFLAG_ANY \
         (XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
          XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
          XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
          XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
-         XFS_DIFLAG_EXTSZINHERIT)
+         XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG)
 
 #endif  /* __XFS_DINODE_H__ */
diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index df66f3a59fac..0f0ad1535951 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -67,6 +67,7 @@ struct fsxattr {
 #define XFS_XFLAG_NOSYMLINKS    0x00000400      /* disallow symlink creation */
 #define XFS_XFLAG_EXTSIZE       0x00000800      /* extent size allocator hint */
 #define XFS_XFLAG_EXTSZINHERIT  0x00001000      /* inherit inode extent size */
+#define XFS_XFLAG_NODEFRAG      0x00002000      /* do not defragment */
 #define XFS_XFLAG_HASATTR       0x80000000      /* no DIFLAG for this   */
 
 /*
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index f5284453441b..083fc0479e69 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -812,6 +812,8 @@ _xfs_dic2xflags(
                         flags |= XFS_XFLAG_EXTSIZE;
                 if (di_flags & XFS_DIFLAG_EXTSZINHERIT)
                         flags |= XFS_XFLAG_EXTSZINHERIT;
+                if (di_flags & XFS_DIFLAG_NODEFRAG)
+                        flags |= XFS_XFLAG_NODEFRAG;
         }
 
         return flags;
@@ -1221,6 +1223,9 @@ xfs_ialloc(
                                 di_flags |= XFS_DIFLAG_NOSYMLINKS;
                         if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
                                 di_flags |= XFS_DIFLAG_PROJINHERIT;
+                        if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) &&
+                            xfs_inherit_nodefrag)
+                                di_flags |= XFS_DIFLAG_NODEFRAG;
                         ip->i_d.di_flags |= di_flags;
                 }
                 /* FALLTHROUGH */
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 2b814f04176d..d1c6349e4018 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -799,6 +799,8 @@ xfs_setattr(
                                 di_flags |= XFS_DIFLAG_NODUMP;
                         if (vap->va_xflags & XFS_XFLAG_PROJINHERIT)
                                 di_flags |= XFS_DIFLAG_PROJINHERIT;
+                        if (vap->va_xflags & XFS_XFLAG_NODEFRAG)
+                                di_flags |= XFS_DIFLAG_NODEFRAG;
                         if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
                                 if (vap->va_xflags & XFS_XFLAG_RTINHERIT)
                                         di_flags |= XFS_DIFLAG_RTINHERIT;