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Go Back   Linux Archive > Redhat > Cluster Development

 
 
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Old 05-28-2012, 02:26 PM
Steven Whitehouse
 
Default GFS2: Add "top dir" flag support

This patch adds support for the "top dir" flag. Currently this is unused
but a subsequent patch is planned which will add support for the
Orlov allocation policy when allocating subdirectories in a parent
with this flag set.

In order to ensure backward compatible behaviour, mkfs.gfs2 does
not currently tag the root directory with this flag, it must always be
set manually.

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

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 31b199f..228e70e 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -142,6 +142,7 @@ static const u32 fsflags_to_gfs2[32] = {
[7] = GFS2_DIF_NOATIME,
[12] = GFS2_DIF_EXHASH,
[14] = GFS2_DIF_INHERIT_JDATA,
+ [17] = GFS2_DIF_TOPDIR,
};

static const u32 gfs2_to_fsflags[32] = {
@@ -150,6 +151,7 @@ static const u32 gfs2_to_fsflags[32] = {
[gfs2fl_AppendOnly] = FS_APPEND_FL,
[gfs2fl_NoAtime] = FS_NOATIME_FL,
[gfs2fl_ExHash] = FS_INDEX_FL,
+ [gfs2fl_TopLevel] = FS_TOPDIR_FL,
[gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
};

@@ -203,6 +205,7 @@ void gfs2_set_inode_flags(struct inode *inode)
GFS2_DIF_NOATIME|
GFS2_DIF_SYNC|
GFS2_DIF_SYSTEM|
+ GFS2_DIF_TOPDIR|
GFS2_DIF_INHERIT_JDATA)

/**
@@ -298,6 +301,7 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)

gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
if (!S_ISDIR(inode->i_mode)) {
+ gfsflags &= ~GFS2_DIF_TOPDIR;
if (gfsflags & GFS2_DIF_INHERIT_JDATA)
gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
return do_gfs2_set_flags(filp, gfsflags, ~0);
diff --git a/include/linux/gfs2_ondisk.h b/include/linux/gfs2_ondisk.h
index fa98bdb..e8ccf6f 100644
--- a/include/linux/gfs2_ondisk.h
+++ b/include/linux/gfs2_ondisk.h
@@ -214,6 +214,7 @@ enum {
gfs2fl_NoAtime = 7,
gfs2fl_Sync = 8,
gfs2fl_System = 9,
+ gfs2fl_TopLevel = 10,
gfs2fl_TruncInProg = 29,
gfs2fl_InheritDirectio = 30,
gfs2fl_InheritJdata = 31,
@@ -230,8 +231,9 @@ enum {
#define GFS2_DIF_NOATIME 0x00000080
#define GFS2_DIF_SYNC 0x00000100
#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
+#define GFS2_DIF_TOPDIR 0x00000400 /* New in gfs2 */
#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
-#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
+#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 /* only in gfs1 */
#define GFS2_DIF_INHERIT_JDATA 0x80000000

struct gfs2_dinode {
 
Old 07-23-2012, 08:00 AM
Steven Whitehouse
 
Default GFS2: Add "top dir" flag support

From: Steven Whitehouse <steve@chygwyn.com>

This patch adds support for the "top dir" flag. Currently this is unused
but a subsequent patch is planned which will add support for the
Orlov allocation policy when allocating subdirectories in a parent
with this flag set.

In order to ensure backward compatible behaviour, mkfs.gfs2 does
not currently tag the root directory with this flag, it must always be
set manually.

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

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 26e2905..6fbf3cb 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -142,6 +142,7 @@ static const u32 fsflags_to_gfs2[32] = {
[7] = GFS2_DIF_NOATIME,
[12] = GFS2_DIF_EXHASH,
[14] = GFS2_DIF_INHERIT_JDATA,
+ [17] = GFS2_DIF_TOPDIR,
};

static const u32 gfs2_to_fsflags[32] = {
@@ -150,6 +151,7 @@ static const u32 gfs2_to_fsflags[32] = {
[gfs2fl_AppendOnly] = FS_APPEND_FL,
[gfs2fl_NoAtime] = FS_NOATIME_FL,
[gfs2fl_ExHash] = FS_INDEX_FL,
+ [gfs2fl_TopLevel] = FS_TOPDIR_FL,
[gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
};

@@ -203,6 +205,7 @@ void gfs2_set_inode_flags(struct inode *inode)
GFS2_DIF_NOATIME|
GFS2_DIF_SYNC|
GFS2_DIF_SYSTEM|
+ GFS2_DIF_TOPDIR|
GFS2_DIF_INHERIT_JDATA)

/**
@@ -298,6 +301,7 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)

gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
if (!S_ISDIR(inode->i_mode)) {
+ gfsflags &= ~GFS2_DIF_TOPDIR;
if (gfsflags & GFS2_DIF_INHERIT_JDATA)
gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
return do_gfs2_set_flags(filp, gfsflags, ~0);
diff --git a/include/linux/gfs2_ondisk.h b/include/linux/gfs2_ondisk.h
index fa98bdb..e8ccf6f 100644
--- a/include/linux/gfs2_ondisk.h
+++ b/include/linux/gfs2_ondisk.h
@@ -214,6 +214,7 @@ enum {
gfs2fl_NoAtime = 7,
gfs2fl_Sync = 8,
gfs2fl_System = 9,
+ gfs2fl_TopLevel = 10,
gfs2fl_TruncInProg = 29,
gfs2fl_InheritDirectio = 30,
gfs2fl_InheritJdata = 31,
@@ -230,8 +231,9 @@ enum {
#define GFS2_DIF_NOATIME 0x00000080
#define GFS2_DIF_SYNC 0x00000100
#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
+#define GFS2_DIF_TOPDIR 0x00000400 /* New in gfs2 */
#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
-#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
+#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 /* only in gfs1 */
#define GFS2_DIF_INHERIT_JDATA 0x80000000

struct gfs2_dinode {
--
1.7.4
 

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