[JFFS2] Prevent ino cache removal for inodes in use
Don't remove inocache for inodes which are in read_inode() or
clear_inode() until they're done.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index a3c6cc1..d1ae565 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: erase.c,v 1.71 2005/02/09 09:17:40 pavlov Exp $
+ * $Id: erase.c,v 1.72 2005/02/27 23:01:32 dwmw2 Exp $
*
*/
@@ -277,11 +277,8 @@
printk("\n");
});
- if (ic->nodes == (void *)ic) {
- D1(printk(KERN_DEBUG "inocache for ino #%u is all gone now. Freeing\n", ic->ino));
+ if (ic->nodes == (void *)ic)
jffs2_del_ino_cache(c, ic);
- jffs2_free_inode_cache(ic);
- }
}
static void jffs2_free_all_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index 3c6d93c..b835a86 100644
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodelist.c,v 1.92 2005/01/19 19:22:00 tpoynor Exp $
+ * $Id: nodelist.c,v 1.93 2005/02/27 23:01:32 dwmw2 Exp $
*
*/
@@ -506,7 +506,7 @@
void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old)
{
struct jffs2_inode_cache **prev;
- D2(printk(KERN_DEBUG "jffs2_del_ino_cache: Del %p (ino #%u)\n", old, old->ino));
+ D1(printk(KERN_DEBUG "jffs2_del_ino_cache: Del %p (ino #%u)\n", old, old->ino));
spin_lock(&c->inocache_lock);
prev = &c->inocache_list[old->ino % INOCACHE_HASHSIZE];
@@ -518,6 +518,14 @@
*prev = old->next;
}
+ /* Free it now unless it's in READING or CLEARING state, which
+ are the transitions upon read_inode() and clear_inode(). The
+ rest of the time we know nobody else is looking at it, and
+ if it's held by read_inode() or clear_inode() they'll free it
+ for themselves. */
+ if (old->state != INO_STATE_READING && old->state != INO_STATE_CLEARING)
+ jffs2_free_inode_cache(old);
+
spin_unlock(&c->inocache_lock);
}
@@ -530,7 +538,6 @@
this = c->inocache_list[i];
while (this) {
next = this->next;
- D2(printk(KERN_DEBUG "jffs2_free_ino_caches: Freeing ino #%u at %p\n", this->ino, this));
jffs2_free_inode_cache(this);
this = next;
}
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 8c12283..57f675c 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodelist.h,v 1.127 2005/02/09 09:23:53 pavlov Exp $
+ * $Id: nodelist.h,v 1.128 2005/02/27 23:01:32 dwmw2 Exp $
*
*/
@@ -135,6 +135,7 @@
#define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */
#define INO_STATE_GC 4 /* GCing a 'pristine' node */
#define INO_STATE_READING 5 /* In read_inode() */
+#define INO_STATE_CLEARING 6 /* In clear_inode() */
#define INOCACHE_HASHSIZE 128
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index 5e1e8ca..f9dcac1 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodemgmt.c,v 1.117 2005/01/25 20:11:11 hammache Exp $
+ * $Id: nodemgmt.c,v 1.118 2005/02/27 23:01:32 dwmw2 Exp $
*
*/
@@ -593,11 +593,8 @@
*p = ref->next_in_ino;
ref->next_in_ino = NULL;
- if (ic->nodes == (void *)ic) {
- D1(printk(KERN_DEBUG "inocache for ino #%u is all gone now. Freeing\n", ic->ino));
+ if (ic->nodes == (void *)ic)
jffs2_del_ino_cache(c, ic);
- jffs2_free_inode_cache(ic);
- }
spin_unlock(&c->erase_completion_lock);
}
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index aca4a0b..a1980a9 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: readinode.c,v 1.117 2004/11/20 18:06:54 dwmw2 Exp $
+ * $Id: readinode.c,v 1.118 2005/02/27 23:01:33 dwmw2 Exp $
*
*/
@@ -672,6 +672,9 @@
down(&f->sem);
deleted = f->inocache && !f->inocache->nlink;
+ if (f->inocache && f->inocache->state != INO_STATE_CHECKING)
+ jffs2_set_inocache_state(c, f->inocache, INO_STATE_CLEARING);
+
if (f->metadata) {
if (deleted)
jffs2_mark_node_obsolete(c, f->metadata->raw);
@@ -688,8 +691,11 @@
jffs2_free_full_dirent(fd);
}
- if (f->inocache && f->inocache->state != INO_STATE_CHECKING)
+ if (f->inocache && f->inocache->state != INO_STATE_CHECKING) {
jffs2_set_inocache_state(c, f->inocache, INO_STATE_CHECKEDABSENT);
+ if (f->inocache->nodes == (void *)f->inocache)
+ jffs2_del_ino_cache(c, f->inocache);
+ }
up(&f->sem);
}
