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[JFFS2][XATTR] rid unnecessary writing of delete marker.

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In the followinf situation, an explicit delete marker is not
necessary, because we can certainlly detect those obsolete
xattr_datum or xattr_ref on next mounting.

- When to delete xattr_datum node.
- When to delete xattr_ref node on removing inode.
- When to delete xattr_ref node on updating xattr.

This patch rids writing delete marker in those situations.

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
KaiGai Kohei
2006-06-24 09:14:13 +09:00
committed by David Woodhouse
parent a1ae76e96a
commit 8a13695cbe
3 changed files with 105 additions and 227 deletions
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fs/jffs2/xattr.h
+1 -22
View File
@@ -16,6 +16,7 @@
#define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */
#define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */
#define JFFS2_XFLAGS_DEAD (0x40) /* This datum is already dead */
#define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */
struct jffs2_xattr_datum
@@ -60,34 +61,12 @@ struct jffs2_xattr_ref
struct jffs2_xattr_ref *next; /* chained from ic->xref_list */
};
#define XDATUM_DELETE_MARKER (0xffffffff)
#define XREF_DELETE_MARKER (0x00000001)
static inline int is_xattr_datum_dead(struct jffs2_xattr_datum *xd)
{
return (xd->version == XDATUM_DELETE_MARKER);
}
static inline void set_xattr_datum_dead(struct jffs2_xattr_datum *xd)
{
xd->version = XDATUM_DELETE_MARKER;
}
static inline int is_xattr_ref_dead(struct jffs2_xattr_ref *ref)
{
return ((ref->xseqno & XREF_DELETE_MARKER) != 0);
}
static inline void set_xattr_ref_dead(struct jffs2_xattr_ref *ref)
{
ref->xseqno |= XREF_DELETE_MARKER;
}
static inline void clr_xattr_ref_dead(struct jffs2_xattr_ref *ref)
{
ref->xseqno &= ~XREF_DELETE_MARKER;
}
#ifdef CONFIG_JFFS2_FS_XATTR
extern void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c);