/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
- * Copyright (C) 2006 NEC Corporation
+ * Copyright © 2006 NEC Corporation
*
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
*/
+
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fs.h>
* is used to release xattr name/value pair and detach from c->xattrindex.
* reclaim_xattr_datum(c)
* is used to reclaim xattr name/value pairs on the xattr name/value pair cache when
- * memory usage by cache is over c->xdatum_mem_threshold. Currentry, this threshold
+ * memory usage by cache is over c->xdatum_mem_threshold. Currently, this threshold
* is hard coded as 32KiB.
* do_verify_xattr_datum(c, xd)
* is used to load the xdatum informations without name/value pair from the medium.
* is used to write xdatum to medium. xd->version will be incremented.
* create_xattr_datum(c, xprefix, xname, xvalue, xsize)
* is used to create new xdatum and write to medium.
- * delete_xattr_datum(c, xd)
- * is used to delete a xdatum. It marks xd JFFS2_XFLAGS_DEAD, and allows
- * GC to reclaim those physical nodes.
+ * unrefer_xattr_datum(c, xd)
+ * is used to delete a xdatum. When nobody refers this xdatum, JFFS2_XFLAGS_DEAD
+ * is set on xd->flags and chained xattr_dead_list or release it immediately.
+ * In the first case, the garbage collector release it later.
* -------------------------------------------------- */
static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize)
{
static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
{
/* must be called under down_write(xattr_sem) */
- D1(dbg_xattr("%s: xid=%u, version=%u\n", __FUNCTION__, xd->xid, xd->version));
+ D1(dbg_xattr("%s: xid=%u, version=%u\n", __func__, xd->xid, xd->version));
if (xd->xname) {
c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len);
kfree(xd->xname);
return xd;
}
-static void delete_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
+static void unrefer_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
{
/* must be called under down_write(xattr_sem) */
- BUG_ON(atomic_read(&xd->refcnt));
+ if (atomic_dec_and_lock(&xd->refcnt, &c->erase_completion_lock)) {
+ unload_xattr_datum(c, xd);
+ xd->flags |= JFFS2_XFLAGS_DEAD;
+ if (xd->node == (void *)xd) {
+ BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID));
+ jffs2_free_xattr_datum(xd);
+ } else {
+ list_add(&xd->xindex, &c->xattr_dead_list);
+ }
+ spin_unlock(&c->erase_completion_lock);
- unload_xattr_datum(c, xd);
- xd->flags |= JFFS2_XFLAGS_DEAD;
- spin_lock(&c->erase_completion_lock);
- if (xd->node == (void *)xd) {
- BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID));
- jffs2_free_xattr_datum(xd);
- } else {
- list_add(&xd->xindex, &c->xattr_dead_list);
+ dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n",
+ xd->xid, xd->version);
}
- spin_unlock(&c->erase_completion_lock);
- dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n", xd->xid, xd->version);
}
/* -------- xref related functions ------------------
dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) was removed.\n",
ref->ino, ref->xid, ref->xseqno);
- if (atomic_dec_and_test(&xd->refcnt))
- delete_xattr_datum(c, xd);
+ unrefer_xattr_datum(c, xd);
}
void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)
When an inode with XATTR is removed, those XATTRs must be removed. */
struct jffs2_xattr_ref *ref, *_ref;
- if (!ic || ic->nlink > 0)
+ if (!ic || ic->pino_nlink > 0)
return;
down_write(&c->xattr_sem);
list_del(&xd->xindex);
jffs2_free_xattr_datum(xd);
}
+ list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) {
+ list_del(&xd->xindex);
+ jffs2_free_xattr_datum(xd);
+ }
}
#define XREF_TMPHASH_SIZE (128)
ref->xd and ref->ic are not valid yet. */
xd = jffs2_find_xattr_datum(c, ref->xid);
ic = jffs2_get_ino_cache(c, ref->ino);
- if (!xd || !ic) {
+ if (!xd || !ic || !ic->pino_nlink) {
dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan.\n",
ref->ino, ref->xid, ref->xseqno);
ref->xseqno |= XREF_DELETE_MARKER;
* do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags)
* is an implementation of setxattr handler on jffs2.
* -------------------------------------------------- */
-struct xattr_handler *jffs2_xattr_handlers[] = {
+const struct xattr_handler *jffs2_xattr_handlers[] = {
&jffs2_user_xattr_handler,
#ifdef CONFIG_JFFS2_FS_SECURITY
&jffs2_security_xattr_handler,
NULL
};
-static struct xattr_handler *xprefix_to_handler(int xprefix) {
- struct xattr_handler *ret;
+static const struct xattr_handler *xprefix_to_handler(int xprefix) {
+ const struct xattr_handler *ret;
switch (xprefix) {
case JFFS2_XPREFIX_USER:
struct jffs2_inode_cache *ic = f->inocache;
struct jffs2_xattr_ref *ref, **pref;
struct jffs2_xattr_datum *xd;
- struct xattr_handler *xhandle;
+ const struct xattr_handler *xhandle;
ssize_t len, rc;
int retry = 0;
if (!xhandle)
continue;
if (buffer) {
- rc = xhandle->list(inode, buffer+len, size-len, xd->xname, xd->name_len);
+ rc = xhandle->list(dentry, buffer+len, size-len,
+ xd->xname, xd->name_len, xd->flags);
} else {
- rc = xhandle->list(inode, NULL, 0, xd->xname, xd->name_len);
+ rc = xhandle->list(dentry, NULL, 0, xd->xname,
+ xd->name_len, xd->flags);
}
if (rc < 0)
goto out;
ref->next = c->xref_dead_list;
c->xref_dead_list = ref;
spin_unlock(&c->erase_completion_lock);
- if (atomic_dec_and_test(&xd->refcnt))
- delete_xattr_datum(c, xd);
+ unrefer_xattr_datum(c, xd);
} else {
ref->ic = ic;
ref->xd = xd;
down_write(&c->xattr_sem);
if (rc) {
JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request);
- if (atomic_dec_and_test(&xd->refcnt))
- delete_xattr_datum(c, xd);
+ unrefer_xattr_datum(c, xd);
up_write(&c->xattr_sem);
return rc;
}
ic->xref = ref;
}
rc = PTR_ERR(newref);
- if (atomic_dec_and_test(&xd->refcnt))
- delete_xattr_datum(c, xd);
+ unrefer_xattr_datum(c, xd);
} else if (ref) {
delete_xattr_ref(c, ref);
}
rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE);
if (rc) {
JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u\n", rc, totlen);
- rc = rc ? rc : -EBADFD;
goto out;
}
rc = save_xattr_datum(c, xd);
rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE);
if (rc) {
JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u\n",
- __FUNCTION__, rc, totlen);
+ __func__, rc, totlen);
rc = rc ? rc : -EBADFD;
goto out;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff