[JFFS2][XATTR] using 'delete marker' for xdatum/xref deletion
Linux-MTD Mailing List
linux-mtd at lists.infradead.org
Tue Jun 27 11:59:01 EDT 2006
Commit: c9f700f840bd481b3e01fcad1ba8da01794a6726
Parent: 6d4f8224d4ee065e0e3186cc554468d735e6015d
commit c9f700f840bd481b3e01fcad1ba8da01794a6726
Author: KaiGai Kohei <kaigai at ak.jp.nec.com>
AuthorDate: Sun Jun 11 10:35:15 2006 +0900
Commit: David Woodhouse <dwmw2 at infradead.org>
CommitDate: Tue Jun 27 16:16:26 2006 +0100
[JFFS2][XATTR] using 'delete marker' for xdatum/xref deletion
- When xdatum is removed, a new xdatum with 'delete marker' is
written. (version==0xffffffff means 'delete marker')
- When xref is removed, a new xref with 'delete marker' is written.
(odd-numbered xseqno means 'delete marker')
- delete_xattr_(datum/xref)_delay() are new deletion functions
are added. We can only use them if we can detect the target
obsolete xdatum/xref as a orphan or errir one.
(e.g when inode deletion, or detecting crc error)
[1/3] jffs2-xattr-v6-01-delete_marker.patch
Signed-off-by: KaiGai Kohei <kaigai at ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2 at infradead.org>
---
fs/jffs2/erase.c | 19 +
fs/jffs2/gc.c | 5
fs/jffs2/jffs2_fs_sb.h | 3
fs/jffs2/malloc.c | 2
fs/jffs2/nodemgmt.c | 21 +
fs/jffs2/scan.c | 57 ++--
fs/jffs2/summary.c | 39 +--
fs/jffs2/xattr.c | 736 ++++++++++++++++++++++++++++++------------------
fs/jffs2/xattr.h | 40 ++-
include/linux/jffs2.h | 1
10 files changed, 584 insertions(+), 339 deletions(-)
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index 1862e8b..1644e34 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -230,7 +230,6 @@ static inline void jffs2_remove_node_ref
at the end of the linked list. Stash it and continue
from the beginning of the list */
ic = (struct jffs2_inode_cache *)(*prev);
- BUG_ON(ic->class != RAWNODE_CLASS_INODE_CACHE);
prev = &ic->nodes;
continue;
}
@@ -254,7 +253,8 @@ static inline void jffs2_remove_node_ref
/* PARANOIA */
if (!ic) {
- printk(KERN_WARNING "inode_cache not found in remove_node_refs()!!\n");
+ JFFS2_WARNING("inode_cache/xattr_datum/xattr_ref"
+ " not found in remove_node_refs()!!\n");
return;
}
@@ -279,8 +279,19 @@ static inline void jffs2_remove_node_ref
printk("\n");
});
- if (ic->nodes == (void *)ic && ic->nlink == 0)
- jffs2_del_ino_cache(c, ic);
+ switch (ic->class) {
+#ifdef CONFIG_JFFS2_FS_XATTR
+ case RAWNODE_CLASS_XATTR_DATUM:
+ jffs2_release_xattr_datum(c, (struct jffs2_xattr_datum *)ic);
+ break;
+ case RAWNODE_CLASS_XATTR_REF:
+ jffs2_release_xattr_ref(c, (struct jffs2_xattr_ref *)ic);
+ break;
+#endif
+ default:
+ if (ic->nodes == (void *)ic && ic->nlink == 0)
+ jffs2_del_ino_cache(c, ic);
+ }
}
void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 477c526..f59b147 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -275,13 +275,12 @@ #ifdef CONFIG_JFFS2_FS_XATTR
* We can decide whether this node is inode or xattr by ic->class. */
if (ic->class == RAWNODE_CLASS_XATTR_DATUM
|| ic->class == RAWNODE_CLASS_XATTR_REF) {
- BUG_ON(raw->next_in_ino != (void *)ic);
spin_unlock(&c->erase_completion_lock);
if (ic->class == RAWNODE_CLASS_XATTR_DATUM) {
- ret = jffs2_garbage_collect_xattr_datum(c, (struct jffs2_xattr_datum *)ic);
+ ret = jffs2_garbage_collect_xattr_datum(c, (struct jffs2_xattr_datum *)ic, raw);
} else {
- ret = jffs2_garbage_collect_xattr_ref(c, (struct jffs2_xattr_ref *)ic);
+ ret = jffs2_garbage_collect_xattr_ref(c, (struct jffs2_xattr_ref *)ic, raw);
}
goto release_sem;
}
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index 935fec1..b985949 100644
--- a/fs/jffs2/jffs2_fs_sb.h
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -119,8 +119,11 @@ #endif
#ifdef CONFIG_JFFS2_FS_XATTR
#define XATTRINDEX_HASHSIZE (57)
uint32_t highest_xid;
+ uint32_t highest_xseqno;
struct list_head xattrindex[XATTRINDEX_HASHSIZE];
struct list_head xattr_unchecked;
+ struct list_head xattr_dead_list;
+ struct jffs2_xattr_ref *xref_dead_list;
struct jffs2_xattr_ref *xref_temp;
struct rw_semaphore xattr_sem;
uint32_t xdatum_mem_usage;
diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c
index 4889d07..8310c95 100644
--- a/fs/jffs2/malloc.c
+++ b/fs/jffs2/malloc.c
@@ -291,6 +291,7 @@ struct jffs2_xattr_datum *jffs2_alloc_xa
memset(xd, 0, sizeof(struct jffs2_xattr_datum));
xd->class = RAWNODE_CLASS_XATTR_DATUM;
+ xd->node = (void *)xd;
INIT_LIST_HEAD(&xd->xindex);
return xd;
}
@@ -309,6 +310,7 @@ struct jffs2_xattr_ref *jffs2_alloc_xatt
memset(ref, 0, sizeof(struct jffs2_xattr_ref));
ref->class = RAWNODE_CLASS_XATTR_REF;
+ ref->node = (void *)ref;
return ref;
}
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index 8bedfd2..01594a2 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -684,19 +684,26 @@ void jffs2_mark_node_obsolete(struct jff
spin_lock(&c->erase_completion_lock);
ic = jffs2_raw_ref_to_ic(ref);
- /* It seems we should never call jffs2_mark_node_obsolete() for
- XATTR nodes.... yet. Make sure we notice if/when we change
- that :) */
- BUG_ON(ic->class != RAWNODE_CLASS_INODE_CACHE);
for (p = &ic->nodes; (*p) != ref; p = &((*p)->next_in_ino))
;
*p = ref->next_in_ino;
ref->next_in_ino = NULL;
- if (ic->nodes == (void *)ic && ic->nlink == 0)
- jffs2_del_ino_cache(c, ic);
-
+ switch (ic->class) {
+#ifdef CONFIG_JFFS2_FS_XATTR
+ case RAWNODE_CLASS_XATTR_DATUM:
+ jffs2_release_xattr_datum(c, (struct jffs2_xattr_datum *)ic);
+ break;
+ case RAWNODE_CLASS_XATTR_REF:
+ jffs2_release_xattr_ref(c, (struct jffs2_xattr_ref *)ic);
+ break;
+#endif
+ default:
+ if (ic->nodes == (void *)ic && ic->nlink == 0)
+ jffs2_del_ino_cache(c, ic);
+ break;
+ }
spin_unlock(&c->erase_completion_lock);
}
diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 6161808..79638f5 100644
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -317,20 +317,25 @@ static int jffs2_scan_xattr_node(struct
struct jffs2_summary *s)
{
struct jffs2_xattr_datum *xd;
- uint32_t totlen, crc;
+ uint32_t xid, version, totlen, crc;
int err;
crc = crc32(0, rx, sizeof(struct jffs2_raw_xattr) - 4);
if (crc != je32_to_cpu(rx->node_crc)) {
- if (je32_to_cpu(rx->node_crc) != 0xffffffff)
- JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
- ofs, je32_to_cpu(rx->node_crc), crc);
+ JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ ofs, je32_to_cpu(rx->node_crc), crc);
if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rx->totlen))))
return err;
return 0;
}
- totlen = PAD(sizeof(*rx) + rx->name_len + 1 + je16_to_cpu(rx->value_len));
+ xid = je32_to_cpu(rx->xid);
+ version = je32_to_cpu(rx->version);
+
+ totlen = sizeof(struct jffs2_raw_xattr);
+ if (version != XDATUM_DELETE_MARKER)
+ totlen += rx->name_len + 1 + je16_to_cpu(rx->value_len);
+ totlen = PAD(totlen);
if (totlen != je32_to_cpu(rx->totlen)) {
JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%u\n",
ofs, je32_to_cpu(rx->totlen), totlen);
@@ -339,22 +344,24 @@ static int jffs2_scan_xattr_node(struct
return 0;
}
- xd = jffs2_setup_xattr_datum(c, je32_to_cpu(rx->xid), je32_to_cpu(rx->version));
- if (IS_ERR(xd)) {
- if (PTR_ERR(xd) == -EEXIST) {
- if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rx->totlen)))))
- return err;
- return 0;
- }
+ xd = jffs2_setup_xattr_datum(c, xid, version);
+ if (IS_ERR(xd))
return PTR_ERR(xd);
- }
- xd->xprefix = rx->xprefix;
- xd->name_len = rx->name_len;
- xd->value_len = je16_to_cpu(rx->value_len);
- xd->data_crc = je32_to_cpu(rx->data_crc);
- xd->node = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, NULL);
- /* FIXME */ xd->node->next_in_ino = (void *)xd;
+ if (xd->version > version) {
+ struct jffs2_raw_node_ref *raw
+ = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, NULL);
+ raw->next_in_ino = xd->node->next_in_ino;
+ xd->node->next_in_ino = raw;
+ } else {
+ xd->version = version;
+ xd->xprefix = rx->xprefix;
+ xd->name_len = rx->name_len;
+ xd->value_len = je16_to_cpu(rx->value_len);
+ xd->data_crc = je32_to_cpu(rx->data_crc);
+
+ jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, (void *)xd);
+ }
if (jffs2_sum_active())
jffs2_sum_add_xattr_mem(s, rx, ofs - jeb->offset);
@@ -373,9 +380,8 @@ static int jffs2_scan_xref_node(struct j
crc = crc32(0, rr, sizeof(*rr) - 4);
if (crc != je32_to_cpu(rr->node_crc)) {
- if (je32_to_cpu(rr->node_crc) != 0xffffffff)
- JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
- ofs, je32_to_cpu(rr->node_crc), crc);
+ JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ ofs, je32_to_cpu(rr->node_crc), crc);
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rr->totlen)))))
return err;
return 0;
@@ -395,6 +401,7 @@ static int jffs2_scan_xref_node(struct j
return -ENOMEM;
/* BEFORE jffs2_build_xattr_subsystem() called,
+ * and AFTER xattr_ref is marked as a dead xref,
* ref->xid is used to store 32bit xid, xd is not used
* ref->ino is used to store 32bit inode-number, ic is not used
* Thoes variables are declared as union, thus using those
@@ -404,11 +411,13 @@ static int jffs2_scan_xref_node(struct j
*/
ref->ino = je32_to_cpu(rr->ino);
ref->xid = je32_to_cpu(rr->xid);
+ ref->xseqno = je32_to_cpu(rr->xseqno);
+ if (ref->xseqno > c->highest_xseqno)
+ c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER);
ref->next = c->xref_temp;
c->xref_temp = ref;
- ref->node = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(rr->totlen)), NULL);
- /* FIXME */ ref->node->next_in_ino = (void *)ref;
+ jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(rr->totlen)), (void *)ref);
if (jffs2_sum_active())
jffs2_sum_add_xref_mem(s, rr, ofs - jeb->offset);
diff --git a/fs/jffs2/summary.c b/fs/jffs2/summary.c
index 0b02fc7..c430f1d 100644
--- a/fs/jffs2/summary.c
+++ b/fs/jffs2/summary.c
@@ -310,8 +310,6 @@ int jffs2_sum_add_kvec(struct jffs2_sb_i
#ifdef CONFIG_JFFS2_FS_XATTR
case JFFS2_NODETYPE_XATTR: {
struct jffs2_sum_xattr_mem *temp;
- if (je32_to_cpu(node->x.version) == 0xffffffff)
- return 0;
temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
if (!temp)
goto no_mem;
@@ -327,10 +325,6 @@ #ifdef CONFIG_JFFS2_FS_XATTR
}
case JFFS2_NODETYPE_XREF: {
struct jffs2_sum_xref_mem *temp;
-
- if (je32_to_cpu(node->r.ino) == 0xffffffff
- && je32_to_cpu(node->r.xid) == 0xffffffff)
- return 0;
temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
if (!temp)
goto no_mem;
@@ -483,22 +477,20 @@ #ifdef CONFIG_JFFS2_FS_XATTR
xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
je32_to_cpu(spx->version));
- if (IS_ERR(xd)) {
- if (PTR_ERR(xd) == -EEXIST) {
- /* a newer version of xd exists */
- if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(spx->totlen))))
- return err;
- sp += JFFS2_SUMMARY_XATTR_SIZE;
- break;
- }
- JFFS2_NOTICE("allocation of xattr_datum failed\n");
+ if (IS_ERR(xd))
return PTR_ERR(xd);
+ if (xd->version > je32_to_cpu(spx->version)) {
+ /* node is not the newest one */
+ struct jffs2_raw_node_ref *raw
+ = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
+ PAD(je32_to_cpu(spx->totlen)), NULL);
+ raw->next_in_ino = xd->node->next_in_ino;
+ xd->node->next_in_ino = raw;
+ } else {
+ xd->version = je32_to_cpu(spx->version);
+ sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
+ PAD(je32_to_cpu(spx->totlen)), (void *)xd);
}
-
- xd->node = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
- PAD(je32_to_cpu(spx->totlen)), NULL);
- /* FIXME */ xd->node->next_in_ino = (void *)xd;
-
*pseudo_random += je32_to_cpu(spx->xid);
sp += JFFS2_SUMMARY_XATTR_SIZE;
@@ -519,14 +511,11 @@ #ifdef CONFIG_JFFS2_FS_XATTR
JFFS2_NOTICE("allocation of xattr_datum failed\n");
return -ENOMEM;
}
- ref->ino = 0xfffffffe;
- ref->xid = 0xfffffffd;
ref->next = c->xref_temp;
c->xref_temp = ref;
- ref->node = sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
- PAD(sizeof(struct jffs2_raw_xref)), NULL);
- /* FIXME */ ref->node->next_in_ino = (void *)ref;
+ sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
+ PAD(sizeof(struct jffs2_raw_xref)), (void *)ref);
*pseudo_random += ref->node->flash_offset;
sp += JFFS2_SUMMARY_XREF_SIZE;
diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index 2d82e25..03871ab 100644
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -23,18 +23,15 @@ #include "nodelist.h"
* xattr_datum_hashkey(xprefix, xname, xvalue, xsize)
* is used to calcurate xdatum hashkey. The reminder of hashkey into XATTRINDEX_HASHSIZE is
* the index of the xattr name/value pair cache (c->xattrindex).
+ * is_xattr_datum_unchecked(c, xd)
+ * returns 1, if xdatum contains any unchecked raw nodes. if all raw nodes are not
+ * unchecked, it returns 0.
* unload_xattr_datum(c, xd)
* 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
* is hard coded as 32KiB.
- * delete_xattr_datum_node(c, xd)
- * is used to delete a jffs2 node is dominated by xdatum. When EBS(Erase Block Summary) is
- * enabled, it overwrites the obsolete node by myself.
- * delete_xattr_datum(c, xd)
- * is used to delete jffs2_xattr_datum object. It must be called with 0-value of reference
- * counter. (It means how many jffs2_xattr_ref object refers this xdatum.)
* do_verify_xattr_datum(c, xd)
* is used to load the xdatum informations without name/value pair from the medium.
* It's necessary once, because those informations are not collected during mounting
@@ -53,8 +50,13 @@ #include "nodelist.h"
* 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_delay(c, xd)
+ * is used to delete a xdatum without 'delete marker'. It has a possibility to detect
+ * orphan xdatum on next mounting.
+ * delete_xattr_datum(c, xd)
+ * is used to delete a xdatum with 'delete marker'. Calling jffs2_reserve_space() is
+ * necessary before this function.
* -------------------------------------------------- */
-
static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize)
{
int name_len = strlen(xname);
@@ -62,6 +64,22 @@ static uint32_t xattr_datum_hashkey(int
return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize);
}
+static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
+{
+ struct jffs2_raw_node_ref *raw;
+ int rc = 0;
+
+ spin_lock(&c->erase_completion_lock);
+ for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) {
+ if (ref_flags(raw) == REF_UNCHECKED) {
+ rc = 1;
+ break;
+ }
+ }
+ spin_unlock(&c->erase_completion_lock);
+ return rc;
+}
+
static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
{
/* must be called under down_write(xattr_sem) */
@@ -107,80 +125,39 @@ static void reclaim_xattr_datum(struct j
before, c->xdatum_mem_usage, before - c->xdatum_mem_usage);
}
-static void delete_xattr_datum_node(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
-{
- /* must be called under down_write(xattr_sem) */
- struct jffs2_raw_xattr rx;
- size_t length;
- int rc;
-
- if (!xd->node) {
- JFFS2_WARNING("xdatum (xid=%u) is removed twice.\n", xd->xid);
- return;
- }
- if (jffs2_sum_active()) {
- memset(&rx, 0xff, sizeof(struct jffs2_raw_xattr));
- rc = jffs2_flash_read(c, ref_offset(xd->node),
- sizeof(struct jffs2_unknown_node),
- &length, (char *)&rx);
- if (rc || length != sizeof(struct jffs2_unknown_node)) {
- JFFS2_ERROR("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n",
- rc, sizeof(struct jffs2_unknown_node),
- length, ref_offset(xd->node));
- }
- rc = jffs2_flash_write(c, ref_offset(xd->node), sizeof(rx),
- &length, (char *)&rx);
- if (rc || length != sizeof(struct jffs2_raw_xattr)) {
- JFFS2_ERROR("jffs2_flash_write()=%d, req=%zu, wrote=%zu ar %#08x\n",
- rc, sizeof(rx), length, ref_offset(xd->node));
- }
- }
- spin_lock(&c->erase_completion_lock);
- xd->node->next_in_ino = NULL;
- spin_unlock(&c->erase_completion_lock);
- jffs2_mark_node_obsolete(c, xd->node);
- xd->node = NULL;
-}
-
-static void delete_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
-{
- /* must be called under down_write(xattr_sem) */
- BUG_ON(xd->refcnt);
-
- unload_xattr_datum(c, xd);
- if (xd->node) {
- delete_xattr_datum_node(c, xd);
- xd->node = NULL;
- }
- jffs2_free_xattr_datum(xd);
-}
-
static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
{
/* must be called under down_write(xattr_sem) */
struct jffs2_eraseblock *jeb;
+ struct jffs2_raw_node_ref *raw;
struct jffs2_raw_xattr rx;
size_t readlen;
- uint32_t crc, totlen;
+ uint32_t crc, offset, totlen;
int rc;
- BUG_ON(!xd->node);
- BUG_ON(ref_flags(xd->node) != REF_UNCHECKED);
+ spin_lock(&c->erase_completion_lock);
+ offset = ref_offset(xd->node);
+ if (ref_flags(xd->node) == REF_PRISTINE)
+ goto complete;
+ spin_unlock(&c->erase_completion_lock);
- rc = jffs2_flash_read(c, ref_offset(xd->node), sizeof(rx), &readlen, (char *)&rx);
+ rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx);
if (rc || readlen != sizeof(rx)) {
JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n",
- rc, sizeof(rx), readlen, ref_offset(xd->node));
+ rc, sizeof(rx), readlen, offset);
return rc ? rc : -EIO;
}
crc = crc32(0, &rx, sizeof(rx) - 4);
if (crc != je32_to_cpu(rx.node_crc)) {
- if (je32_to_cpu(rx.node_crc) != 0xffffffff)
- JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
- ref_offset(xd->node), je32_to_cpu(rx.hdr_crc), crc);
+ JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ offset, je32_to_cpu(rx.hdr_crc), crc);
+ xd->flags |= JFFS2_XFLAGS_INVALID;
return EIO;
}
- totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len));
+ totlen = sizeof(rx);
+ if (xd->version != XDATUM_DELETE_MARKER)
+ totlen += rx.name_len + 1 + je16_to_cpu(rx.value_len);
+ totlen = PAD(totlen);
if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK
|| je16_to_cpu(rx.nodetype) != JFFS2_NODETYPE_XATTR
|| je32_to_cpu(rx.totlen) != totlen
@@ -188,11 +165,12 @@ static int do_verify_xattr_datum(struct
|| je32_to_cpu(rx.version) != xd->version) {
JFFS2_ERROR("inconsistent xdatum at %#08x, magic=%#04x/%#04x, "
"nodetype=%#04x/%#04x, totlen=%u/%u, xid=%u/%u, version=%u/%u\n",
- ref_offset(xd->node), je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK,
+ offset, je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK,
je16_to_cpu(rx.nodetype), JFFS2_NODETYPE_XATTR,
je32_to_cpu(rx.totlen), totlen,
je32_to_cpu(rx.xid), xd->xid,
je32_to_cpu(rx.version), xd->version);
+ xd->flags |= JFFS2_XFLAGS_INVALID;
return EIO;
}
xd->xprefix = rx.xprefix;
@@ -200,14 +178,17 @@ static int do_verify_xattr_datum(struct
xd->value_len = je16_to_cpu(rx.value_len);
xd->data_crc = je32_to_cpu(rx.data_crc);
- /* This JFFS2_NODETYPE_XATTR node is checked */
- jeb = &c->blocks[ref_offset(xd->node) / c->sector_size];
- totlen = PAD(je32_to_cpu(rx.totlen));
-
spin_lock(&c->erase_completion_lock);
- c->unchecked_size -= totlen; c->used_size += totlen;
- jeb->unchecked_size -= totlen; jeb->used_size += totlen;
- xd->node->flash_offset = ref_offset(xd->node) | REF_PRISTINE;
+ complete:
+ for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) {
+ jeb = &c->blocks[ref_offset(raw) / c->sector_size];
+ totlen = PAD(ref_totlen(c, jeb, raw));
+ if (ref_flags(raw) == REF_UNCHECKED) {
+ c->unchecked_size -= totlen; c->used_size += totlen;
+ jeb->unchecked_size -= totlen; jeb->used_size += totlen;
+ }
+ raw->flash_offset = ref_offset(raw) | ((xd->node==raw) ? REF_PRISTINE : REF_NORMAL);
+ }
spin_unlock(&c->erase_completion_lock);
/* unchecked xdatum is chained with c->xattr_unchecked */
@@ -227,7 +208,6 @@ static int do_load_xattr_datum(struct jf
uint32_t crc, length;
int i, ret, retry = 0;
- BUG_ON(!xd->node);
BUG_ON(ref_flags(xd->node) != REF_PRISTINE);
BUG_ON(!list_empty(&xd->xindex));
retry:
@@ -253,6 +233,7 @@ static int do_load_xattr_datum(struct jf
" at %#08x, read: 0x%08x calculated: 0x%08x\n",
ref_offset(xd->node), xd->data_crc, crc);
kfree(data);
+ xd->flags |= JFFS2_XFLAGS_INVALID;
return EIO;
}
@@ -286,16 +267,13 @@ static int load_xattr_datum(struct jffs2
* rc > 0 : Unrecoverable error, this node should be deleted.
*/
int rc = 0;
- BUG_ON(xd->xname);
- if (!xd->node)
+
+ if (xd->xname)
+ return 0;
+ if (xd->flags & JFFS2_XFLAGS_INVALID)
return EIO;
- if (unlikely(ref_flags(xd->node) != REF_PRISTINE)) {
+ if (unlikely(is_xattr_datum_unchecked(c, xd)))
rc = do_verify_xattr_datum(c, xd);
- if (rc > 0) {
- list_del_init(&xd->xindex);
- delete_xattr_datum_node(c, xd);
- }
- }
if (!rc)
rc = do_load_xattr_datum(c, xd);
return rc;
@@ -304,36 +282,43 @@ static int load_xattr_datum(struct jffs2
static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
{
/* must be called under down_write(xattr_sem) */
- struct jffs2_raw_node_ref *raw;
struct jffs2_raw_xattr rx;
struct kvec vecs[2];
size_t length;
- int rc, totlen;
+ int rc, totlen, nvecs = 1;
uint32_t phys_ofs = write_ofs(c);
- BUG_ON(!xd->xname);
+ BUG_ON(is_xattr_datum_dead(xd) || (xd->flags & JFFS2_XFLAGS_INVALID)
+ ? !!xd->xname : !xd->xname);
vecs[0].iov_base = ℞
- vecs[0].iov_len = PAD(sizeof(rx));
- vecs[1].iov_base = xd->xname;
- vecs[1].iov_len = xd->name_len + 1 + xd->value_len;
- totlen = vecs[0].iov_len + vecs[1].iov_len;
-
+ vecs[0].iov_len = totlen = sizeof(rx);
+ if (!is_xattr_datum_dead(xd) && !(xd->flags & JFFS2_XFLAGS_INVALID)) {
+ nvecs++;
+ vecs[1].iov_base = xd->xname;
+ vecs[1].iov_len = xd->name_len + 1 + xd->value_len;
+ totlen += vecs[1].iov_len;
+ }
/* Setup raw-xattr */
+ memset(&rx, 0, sizeof(rx));
rx.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rx.nodetype = cpu_to_je16(JFFS2_NODETYPE_XATTR);
rx.totlen = cpu_to_je32(PAD(totlen));
rx.hdr_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_unknown_node) - 4));
rx.xid = cpu_to_je32(xd->xid);
- rx.version = cpu_to_je32(++xd->version);
- rx.xprefix = xd->xprefix;
- rx.name_len = xd->name_len;
- rx.value_len = cpu_to_je16(xd->value_len);
- rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len));
+ if (!is_xattr_datum_dead(xd) && !(xd->flags & JFFS2_XFLAGS_INVALID)) {
+ rx.version = cpu_to_je32(++xd->version);
+ rx.xprefix = xd->xprefix;
+ rx.name_len = xd->name_len;
+ rx.value_len = cpu_to_je16(xd->value_len);
+ rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len));
+ } else {
+ rx.version = cpu_to_je32(XDATUM_DELETE_MARKER);
+ }
rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4));
- rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0);
+ rc = jffs2_flash_writev(c, vecs, nvecs, phys_ofs, &length, 0);
if (rc || totlen != length) {
JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%zu, at %#08x\n",
rc, totlen, length, phys_ofs);
@@ -343,14 +328,8 @@ static int save_xattr_datum(struct jffs2
return rc;
}
-
/* success */
- raw = jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), NULL);
- /* FIXME */ raw->next_in_ino = (void *)xd;
-
- if (xd->node)
- delete_xattr_datum_node(c, xd);
- xd->node = raw;
+ jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd);
dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s')\n",
xd->xid, xd->version, xd->xprefix, xd->xname);
@@ -426,6 +405,39 @@ static struct jffs2_xattr_datum *create_
return xd;
}
+static void delete_xattr_datum_delay(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
+{
+ /* must be called under down_write(xattr_sem) */
+ BUG_ON(xd->refcnt);
+
+ unload_xattr_datum(c, xd);
+ set_xattr_datum_dead(xd);
+ spin_lock(&c->erase_completion_lock);
+ list_add(&xd->xindex, &c->xattr_dead_list);
+ spin_unlock(&c->erase_completion_lock);
+ JFFS2_NOTICE("xdatum(xid=%u) was removed without delete marker. "
+ "An orphan xdatum may be detected on next mounting.\n", xd->xid);
+}
+
+static void delete_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
+{
+ /* must be called under jffs2_reserve_space() and down_write(xattr_sem) */
+ int rc;
+ BUG_ON(xd->refcnt);
+
+ unload_xattr_datum(c, xd);
+ set_xattr_datum_dead(xd);
+ rc = save_xattr_datum(c, xd);
+ if (rc) {
+ JFFS2_NOTICE("xdatum(xid=%u) was removed without delete marker. "
+ "An orphan xdatum may be detected on next mounting.\n",
+ xd->xid);
+ }
+ spin_lock(&c->erase_completion_lock);
+ list_add(&xd->xindex, &c->xattr_dead_list);
+ spin_unlock(&c->erase_completion_lock);
+}
+
/* -------- xref related functions ------------------
* verify_xattr_ref(c, ref)
* is used to load xref information from medium. Because summary data does not
@@ -450,25 +462,29 @@ static struct jffs2_xattr_datum *create_
static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
{
struct jffs2_eraseblock *jeb;
+ struct jffs2_raw_node_ref *raw;
struct jffs2_raw_xref rr;
size_t readlen;
- uint32_t crc, totlen;
+ uint32_t crc, offset, totlen;
int rc;
- BUG_ON(ref_flags(ref->node) != REF_UNCHECKED);
+ spin_lock(&c->erase_completion_lock);
+ if (ref_flags(ref->node) != REF_UNCHECKED)
+ goto complete;
+ offset = ref_offset(ref->node);
+ spin_unlock(&c->erase_completion_lock);
- rc = jffs2_flash_read(c, ref_offset(ref->node), sizeof(rr), &readlen, (char *)&rr);
+ rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr);
if (rc || sizeof(rr) != readlen) {
JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu, at %#08x\n",
- rc, sizeof(rr), readlen, ref_offset(ref->node));
+ rc, sizeof(rr), readlen, offset);
return rc ? rc : -EIO;
}
/* obsolete node */
crc = crc32(0, &rr, sizeof(rr) - 4);
if (crc != je32_to_cpu(rr.node_crc)) {
- if (je32_to_cpu(rr.node_crc) != 0xffffffff)
- JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
- ref_offset(ref->node), je32_to_cpu(rr.node_crc), crc);
+ JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
+ offset, je32_to_cpu(rr.node_crc), crc);
return EIO;
}
if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK
@@ -476,22 +492,28 @@ static int verify_xattr_ref(struct jffs2
|| je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) {
JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, "
"nodetype=%#04x/%#04x, totlen=%u/%zu\n",
- ref_offset(ref->node), je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK,
+ offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK,
je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF,
je32_to_cpu(rr.totlen), PAD(sizeof(rr)));
return EIO;
}
ref->ino = je32_to_cpu(rr.ino);
ref->xid = je32_to_cpu(rr.xid);
-
- /* fixup superblock/eraseblock info */
- jeb = &c->blocks[ref_offset(ref->node) / c->sector_size];
- totlen = PAD(sizeof(rr));
+ ref->xseqno = je32_to_cpu(rr.xseqno);
+ if (ref->xseqno > c->highest_xseqno)
+ c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER);
spin_lock(&c->erase_completion_lock);
- c->unchecked_size -= totlen; c->used_size += totlen;
- jeb->unchecked_size -= totlen; jeb->used_size += totlen;
- ref->node->flash_offset = ref_offset(ref->node) | REF_PRISTINE;
+ complete:
+ for (raw=ref->node; raw != (void *)ref; raw=raw->next_in_ino) {
+ jeb = &c->blocks[ref_offset(raw) / c->sector_size];
+ totlen = PAD(ref_totlen(c, jeb, raw));
+ if (ref_flags(raw) == REF_UNCHECKED) {
+ c->unchecked_size -= totlen; c->used_size += totlen;
+ jeb->unchecked_size -= totlen; jeb->used_size += totlen;
+ }
+ raw->flash_offset = ref_offset(raw) | ((ref->node==raw) ? REF_PRISTINE : REF_NORMAL);
+ }
spin_unlock(&c->erase_completion_lock);
dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x\n",
@@ -499,58 +521,12 @@ static int verify_xattr_ref(struct jffs2
return 0;
}
-static void delete_xattr_ref_node(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
-{
- struct jffs2_raw_xref rr;
- size_t length;
- int rc;
-
- if (jffs2_sum_active()) {
- memset(&rr, 0xff, sizeof(rr));
- rc = jffs2_flash_read(c, ref_offset(ref->node),
- sizeof(struct jffs2_unknown_node),
- &length, (char *)&rr);
- if (rc || length != sizeof(struct jffs2_unknown_node)) {
- JFFS2_ERROR("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n",
- rc, sizeof(struct jffs2_unknown_node),
- length, ref_offset(ref->node));
- }
- rc = jffs2_flash_write(c, ref_offset(ref->node), sizeof(rr),
- &length, (char *)&rr);
- if (rc || length != sizeof(struct jffs2_raw_xref)) {
- JFFS2_ERROR("jffs2_flash_write()=%d, req=%zu, wrote=%zu at %#08x\n",
- rc, sizeof(rr), length, ref_offset(ref->node));
- }
- }
- spin_lock(&c->erase_completion_lock);
- ref->node->next_in_ino = NULL;
- spin_unlock(&c->erase_completion_lock);
- jffs2_mark_node_obsolete(c, ref->node);
- ref->node = NULL;
-}
-
-static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
-{
- /* must be called under down_write(xattr_sem) */
- struct jffs2_xattr_datum *xd;
-
- BUG_ON(!ref->node);
- delete_xattr_ref_node(c, ref);
-
- xd = ref->xd;
- xd->refcnt--;
- if (!xd->refcnt)
- delete_xattr_datum(c, xd);
- jffs2_free_xattr_ref(ref);
-}
-
static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
{
/* must be called under down_write(xattr_sem) */
- struct jffs2_raw_node_ref *raw;
struct jffs2_raw_xref rr;
size_t length;
- uint32_t phys_ofs = write_ofs(c);
+ uint32_t xseqno, phys_ofs = write_ofs(c);
int ret;
rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -558,8 +534,16 @@ static int save_xattr_ref(struct jffs2_s
rr.totlen = cpu_to_je32(PAD(sizeof(rr)));
rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4));
- rr.ino = cpu_to_je32(ref->ic->ino);
- rr.xid = cpu_to_je32(ref->xd->xid);
+ xseqno = (c->highest_xseqno += 2);
+ if (is_xattr_ref_dead(ref)) {
+ xseqno |= XREF_DELETE_MARKER;
+ rr.ino = cpu_to_je32(ref->ino);
+ rr.xid = cpu_to_je32(ref->xid);
+ } else {
+ rr.ino = cpu_to_je32(ref->ic->ino);
+ rr.xid = cpu_to_je32(ref->xd->xid);
+ }
+ rr.xseqno = cpu_to_je32(xseqno);
rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4));
ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr);
@@ -572,12 +556,9 @@ static int save_xattr_ref(struct jffs2_s
return ret;
}
-
- raw = jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), NULL);
- /* FIXME */ raw->next_in_ino = (void *)ref;
- if (ref->node)
- delete_xattr_ref_node(c, ref);
- ref->node = raw;
+ /* success */
+ ref->xseqno = xseqno;
+ jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref);
dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid);
@@ -610,22 +591,116 @@ static struct jffs2_xattr_ref *create_xa
return ref; /* success */
}
+static void delete_xattr_ref_delay(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
+{
+ /* must be called under down_write(xattr_sem) */
+ struct jffs2_xattr_datum *xd;
+
+ set_xattr_ref_dead(ref);
+ xd = ref->xd;
+ ref->ino = ref->ic->ino;
+ ref->xid = ref->xd->xid;
+ spin_lock(&c->erase_completion_lock);
+ ref->next = c->xref_dead_list;
+ c->xref_dead_list = ref;
+ spin_unlock(&c->erase_completion_lock);
+
+ JFFS2_NOTICE("xref(ino=%u, xid=%u) was removed without delete marker. "
+ "An orphan xref may be detected on next mounting.\n",
+ ref->ino, ref->xid);
+
+ if (!--xd->refcnt)
+ delete_xattr_datum_delay(c, xd);
+}
+
+static int delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, int enforce)
+{
+ /* must be called under jffs2_reserve_space() and down_write(xattr_sem) */
+ struct jffs2_inode_cache *ic;
+ struct jffs2_xattr_datum *xd;
+ uint32_t length;
+ int rc;
+
+ set_xattr_ref_dead(ref);
+ ic = ref->ic;
+ xd = ref->xd;
+ ref->ino = ic->ino;
+ ref->xid = xd->xid;
+ rc = save_xattr_ref(c, ref);
+ if (rc) {
+ if (!enforce) {
+ clr_xattr_ref_dead(ref);
+ ref->ic = ic;
+ ref->xd = xd;
+ return rc;
+ }
+ JFFS2_WARNING("could not write delete marker of xref(ino=%u, xid=%u). "
+ "An orphan xref may be detected on next mounting.\n",
+ ref->ic->ino, ref->xd->xid);
+ }
+ spin_lock(&c->erase_completion_lock);
+ ref->next = c->xref_dead_list;
+ c->xref_dead_list = ref;
+ spin_unlock(&c->erase_completion_lock);
+
+ xd->refcnt--;
+ if (xd->refcnt)
+ return 0;
+
+ /* delete xdatum */
+ unload_xattr_datum(c, xd);
+ up_write(&c->xattr_sem);
+ jffs2_complete_reservation(c);
+
+ rc = jffs2_reserve_space(c, PAD(sizeof(struct jffs2_raw_xattr)), &length,
+ ALLOC_DELETION, JFFS2_SUMMARY_XATTR_SIZE);
+ if (rc) {
+ down(&c->alloc_sem);
+ down_write(&c->xattr_sem);
+ delete_xattr_datum_delay(c, xd);
+ } else {
+ down_write(&c->xattr_sem);
+ delete_xattr_datum(c, xd);
+ }
+ return 0;
+}
+
void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)
{
/* It's called from jffs2_clear_inode() on inode removing.
When an inode with XATTR is removed, those XATTRs must be removed. */
- struct jffs2_xattr_ref *ref, *_ref;
+ struct jffs2_xattr_ref *ref;
+ uint32_t length;
+ int rc, retry;
if (!ic || ic->nlink > 0)
return;
+ down_read(&c->xattr_sem);
+ if (!ic->xref) {
+ up_read(&c->xattr_sem);
+ return;
+ }
+ up_read(&c->xattr_sem);
+ retry:
+ rc = jffs2_reserve_space(c, PAD(sizeof(struct jffs2_raw_xref)), &length,
+ ALLOC_DELETION, JFFS2_SUMMARY_XREF_SIZE);
down_write(&c->xattr_sem);
- for (ref = ic->xref; ref; ref = _ref) {
- _ref = ref->next;
- delete_xattr_ref(c, ref);
+ if (ic->xref) {
+ ref = ic->xref;
+ ic->xref = ref->next;
+ if (rc) {
+ delete_xattr_ref_delay(c, ref);
+ } else {
+ delete_xattr_ref(c, ref, 1);
+ }
}
- ic->xref = NULL;
+ retry = ic->xref ? 1 : 0;
up_write(&c->xattr_sem);
+ if (!rc)
+ jffs2_complete_reservation(c);
+ if (retry)
+ goto retry;
}
void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)
@@ -655,7 +730,7 @@ static int check_xattr_ref_inode(struct
* duplicate name/value pairs. If duplicate name/value pair would be found,
* one will be removed.
*/
- struct jffs2_xattr_ref *ref, *cmp, **pref;
+ struct jffs2_xattr_ref *ref, *cmp, **pref, **pcmp;
int rc = 0;
if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED))
@@ -668,27 +743,32 @@ static int check_xattr_ref_inode(struct
rc = load_xattr_datum(c, ref->xd);
if (unlikely(rc > 0)) {
*pref = ref->next;
- delete_xattr_ref(c, ref);
+ delete_xattr_ref_delay(c, ref);
goto retry;
} else if (unlikely(rc < 0))
goto out;
}
- for (cmp=ref->next, pref=&ref->next; cmp; pref=&cmp->next, cmp=cmp->next) {
+ for (cmp=ref->next, pcmp=&ref->next; cmp; pcmp=&cmp->next, cmp=cmp->next) {
if (!cmp->xd->xname) {
ref->xd->flags |= JFFS2_XFLAGS_BIND;
rc = load_xattr_datum(c, cmp->xd);
ref->xd->flags &= ~JFFS2_XFLAGS_BIND;
if (unlikely(rc > 0)) {
- *pref = cmp->next;
- delete_xattr_ref(c, cmp);
+ *pcmp = cmp->next;
+ delete_xattr_ref_delay(c, cmp);
goto retry;
} else if (unlikely(rc < 0))
goto out;
}
if (ref->xd->xprefix == cmp->xd->xprefix
&& !strcmp(ref->xd->xname, cmp->xd->xname)) {
- *pref = cmp->next;
- delete_xattr_ref(c, cmp);
+ if (ref->xseqno > cmp->xseqno) {
+ *pcmp = cmp->next;
+ delete_xattr_ref_delay(c, cmp);
+ } else {
+ *pref = ref->next;
+ delete_xattr_ref_delay(c, ref);
+ }
goto retry;
}
}
@@ -719,9 +799,13 @@ void jffs2_init_xattr_subsystem(struct j
for (i=0; i < XATTRINDEX_HASHSIZE; i++)
INIT_LIST_HEAD(&c->xattrindex[i]);
INIT_LIST_HEAD(&c->xattr_unchecked);
+ INIT_LIST_HEAD(&c->xattr_dead_list);
+ c->xref_dead_list = NULL;
c->xref_temp = NULL;
init_rwsem(&c->xattr_sem);
+ c->highest_xid = 0;
+ c->highest_xseqno = 0;
c->xdatum_mem_usage = 0;
c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */
}
@@ -751,7 +835,11 @@ void jffs2_clear_xattr_subsystem(struct
_ref = ref->next;
jffs2_free_xattr_ref(ref);
}
- c->xref_temp = NULL;
+
+ for (ref=c->xref_dead_list; ref; ref = _ref) {
+ _ref = ref->next;
+ jffs2_free_xattr_ref(ref);
+ }
for (i=0; i < XATTRINDEX_HASHSIZE; i++) {
list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {
@@ -761,64 +849,120 @@ void jffs2_clear_xattr_subsystem(struct
jffs2_free_xattr_datum(xd);
}
}
+
+ list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) {
+ list_del(&xd->xindex);
+ jffs2_free_xattr_datum(xd);
+ }
}
+#define XREF_TMPHASH_SIZE (128)
void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c)
{
struct jffs2_xattr_ref *ref, *_ref;
+ struct jffs2_xattr_ref *xref_tmphash[XREF_TMPHASH_SIZE];
struct jffs2_xattr_datum *xd, *_xd;
struct jffs2_inode_cache *ic;
- int i, xdatum_count =0, xdatum_unchecked_count = 0, xref_count = 0;
+ struct jffs2_raw_node_ref *raw;
+ int i, xdatum_count = 0, xdatum_unchecked_count = 0, xref_count = 0;
BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING));
+ /* Phase.1 : Drop dead xdatum */
+ for (i=0; i < XATTRINDEX_HASHSIZE; i++) {
+ list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {
+ BUG_ON(xd->node == (void *)xd);
+ if (is_xattr_datum_dead(xd)) {
+ list_del_init(&xd->xindex);
+ list_add(&xd->xindex, &c->xattr_unchecked);
+ }
+ }
+ }
- /* Phase.1 */
+ /* Phase.2 : Merge same xref */
+ for (i=0; i < XREF_TMPHASH_SIZE; i++)
+ xref_tmphash[i] = NULL;
for (ref=c->xref_temp; ref; ref=_ref) {
+ struct jffs2_xattr_ref *tmp;
+
_ref = ref->next;
- /* checking REF_UNCHECKED nodes */
if (ref_flags(ref->node) != REF_PRISTINE) {
if (verify_xattr_ref(c, ref)) {
- delete_xattr_ref_node(c, ref);
+ BUG_ON(ref->node->next_in_ino != (void *)ref);
+ ref->node->next_in_ino = NULL;
+ jffs2_mark_node_obsolete(c, ref->node);
jffs2_free_xattr_ref(ref);
continue;
}
}
- /* At this point, ref->xid and ref->ino contain XID and inode number.
- 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 (ref_flags(ref->node) != REF_UNCHECKED)
- JFFS2_WARNING("xref(ino=%u, xid=%u) is orphan. \n",
- ref->ino, ref->xid);
- delete_xattr_ref_node(c, ref);
+
+ i = (ref->ino ^ ref->xid) % XREF_TMPHASH_SIZE;
+ for (tmp=xref_tmphash[i]; tmp; tmp=tmp->next) {
+ if (tmp->ino == ref->ino && tmp->xid == ref->xid)
+ break;
+ }
+ if (tmp) {
+ raw = ref->node;
+ if (ref->xseqno > tmp->xseqno) {
+ tmp->xseqno = ref->xseqno;
+ raw->next_in_ino = tmp->node;
+ tmp->node = raw;
+ } else {
+ raw->next_in_ino = tmp->node->next_in_ino;
+ tmp->node->next_in_ino = raw;
+ }
jffs2_free_xattr_ref(ref);
continue;
+ } else {
+ ref->next = xref_tmphash[i];
+ xref_tmphash[i] = ref;
}
- ref->xd = xd;
- ref->ic = ic;
- xd->refcnt++;
- ref->next = ic->xref;
- ic->xref = ref;
- xref_count++;
}
c->xref_temp = NULL;
- /* After this, ref->xid/ino are NEVER used. */
- /* Phase.2 */
+ /* Phase.3 : Bind xref with inode_cache and xattr_datum */
+ for (i=0; i < XREF_TMPHASH_SIZE; i++) {
+ for (ref=xref_tmphash[i]; ref; ref=_ref) {
+ _ref = ref->next;
+ if (is_xattr_ref_dead(ref)) {
+ ref->next = c->xref_dead_list;
+ c->xref_dead_list = ref;
+ continue;
+ }
+ /* At this point, ref->xid and ref->ino contain XID and inode number.
+ 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) {
+ JFFS2_WARNING("xref(ino=%u, xid=%u, xseqno=%u) is orphan. \n",
+ ref->ino, ref->xid, ref->xseqno);
+ set_xattr_ref_dead(ref);
+ ref->next = c->xref_dead_list;
+ c->xref_dead_list = ref;
+ continue;
+ }
+ ref->xd = xd;
+ ref->ic = ic;
+ xd->refcnt++;
+ ref->next = ic->xref;
+ ic->xref = ref;
+ xref_count++;
+ }
+ }
+
+ /* Phase.4 : Link unchecked xdatum to xattr_unchecked list */
for (i=0; i < XATTRINDEX_HASHSIZE; i++) {
list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {
list_del_init(&xd->xindex);
if (!xd->refcnt) {
- if (ref_flags(xd->node) != REF_UNCHECKED)
- JFFS2_WARNING("orphan xdatum(xid=%u, version=%u) at %#08x\n",
- xd->xid, xd->version, ref_offset(xd->node));
- delete_xattr_datum(c, xd);
+ JFFS2_WARNING("orphan xdatum(xid=%u, version=%u)\n",
+ xd->xid, xd->version);
+ set_xattr_datum_dead(xd);
+ list_add(&xd->xindex, &c->xattr_unchecked);
continue;
}
- if (ref_flags(xd->node) != REF_PRISTINE) {
- dbg_xattr("unchecked xdatum(xid=%u) at %#08x\n",
- xd->xid, ref_offset(xd->node));
+ if (is_xattr_datum_unchecked(c, xd)) {
+ dbg_xattr("unchecked xdatum(xid=%u, version=%u)\n",
+ xd->xid, xd->version);
list_add(&xd->xindex, &c->xattr_unchecked);
xdatum_unchecked_count++;
}
@@ -833,28 +977,18 @@ void jffs2_build_xattr_subsystem(struct
struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
uint32_t xid, uint32_t version)
{
- struct jffs2_xattr_datum *xd, *_xd;
+ struct jffs2_xattr_datum *xd;
- _xd = jffs2_find_xattr_datum(c, xid);
- if (_xd) {
- dbg_xattr("duplicate xdatum (xid=%u, version=%u/%u) at %#08x\n",
- xid, version, _xd->version, ref_offset(_xd->node));
- if (version < _xd->version)
- return ERR_PTR(-EEXIST);
- }
- xd = jffs2_alloc_xattr_datum();
- if (!xd)
- return ERR_PTR(-ENOMEM);
- xd->xid = xid;
- xd->version = version;
- if (xd->xid > c->highest_xid)
- c->highest_xid = xd->xid;
- list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]);
-
- if (_xd) {
- list_del_init(&_xd->xindex);
- delete_xattr_datum_node(c, _xd);
- jffs2_free_xattr_datum(_xd);
+ xd = jffs2_find_xattr_datum(c, xid);
+ if (!xd) {
+ xd = jffs2_alloc_xattr_datum();
+ if (!xd)
+ return ERR_PTR(-ENOMEM);
+ xd->xid = xid;
+ xd->version = version;
+ if (xd->xid > c->highest_xid)
+ c->highest_xid = xd->xid;
+ list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]);
}
return xd;
}
@@ -945,7 +1079,7 @@ ssize_t jffs2_listxattr(struct dentry *d
rc = load_xattr_datum(c, xd);
if (unlikely(rc > 0)) {
*pref = ref->next;
- delete_xattr_ref(c, ref);
+ delete_xattr_ref_delay(c, ref);
goto retry;
} else if (unlikely(rc < 0))
goto out;
@@ -1006,7 +1140,7 @@ int do_jffs2_getxattr(struct inode *inod
rc = load_xattr_datum(c, xd);
if (unlikely(rc > 0)) {
*pref = ref->next;
- delete_xattr_ref(c, ref);
+ delete_xattr_ref_delay(c, ref);
goto retry;
} else if (unlikely(rc < 0)) {
goto out;
@@ -1069,7 +1203,7 @@ int do_jffs2_setxattr(struct inode *inod
rc = load_xattr_datum(c, xd);
if (unlikely(rc > 0)) {
*pref = ref->next;
- delete_xattr_ref(c, ref);
+ delete_xattr_ref_delay(c, ref);
goto retry;
} else if (unlikely(rc < 0))
goto out;
@@ -1081,8 +1215,7 @@ int do_jffs2_setxattr(struct inode *inod
}
if (!buffer) {
*pref = ref->next;
- delete_xattr_ref(c, ref);
- rc = 0;
+ rc = delete_xattr_ref(c, ref, 0);
goto out;
}
goto found;
@@ -1094,7 +1227,7 @@ int do_jffs2_setxattr(struct inode *inod
goto out;
}
if (!buffer) {
- rc = -EINVAL;
+ rc = -ENODATA;
goto out;
}
found:
@@ -1110,16 +1243,15 @@ int do_jffs2_setxattr(struct inode *inod
request = PAD(sizeof(struct jffs2_raw_xref));
rc = jffs2_reserve_space(c, request, &length,
ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE);
+ down_write(&c->xattr_sem);
if (rc) {
JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request);
- down_write(&c->xattr_sem);
xd->refcnt--;
if (!xd->refcnt)
- delete_xattr_datum(c, xd);
+ delete_xattr_datum_delay(c, xd);
up_write(&c->xattr_sem);
return rc;
}
- down_write(&c->xattr_sem);
if (ref)
*pref = ref->next;
newref = create_xattr_ref(c, ic, xd);
@@ -1131,9 +1263,21 @@ int do_jffs2_setxattr(struct inode *inod
rc = PTR_ERR(newref);
xd->refcnt--;
if (!xd->refcnt)
- delete_xattr_datum(c, xd);
+ delete_xattr_datum_delay(c, xd);
} else if (ref) {
- delete_xattr_ref(c, ref);
+ up_write(&c->xattr_sem);
+ jffs2_complete_reservation(c);
+
+ rc = jffs2_reserve_space(c, request, &length,
+ ALLOC_DELETION, JFFS2_SUMMARY_XREF_SIZE);
+ down_write(&c->xattr_sem);
+ if (rc) {
+ JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request);
+ delete_xattr_ref_delay(c, ref);
+ up_write(&c->xattr_sem);
+ return 0;
+ }
+ delete_xattr_ref(c, ref, 1);
}
out:
up_write(&c->xattr_sem);
@@ -1142,38 +1286,37 @@ int do_jffs2_setxattr(struct inode *inod
}
/* -------- garbage collector functions -------------
- * jffs2_garbage_collect_xattr_datum(c, xd)
+ * jffs2_garbage_collect_xattr_datum(c, xd, raw)
* is used to move xdatum into new node.
- * jffs2_garbage_collect_xattr_ref(c, ref)
+ * jffs2_garbage_collect_xattr_ref(c, ref, raw)
* is used to move xref into new node.
* jffs2_verify_xattr(c)
* is used to call do_verify_xattr_datum() before garbage collecting.
* -------------------------------------------------- */
-int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
+int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,
+ struct jffs2_raw_node_ref *raw)
{
uint32_t totlen, length, old_ofs;
- int rc = -EINVAL;
+ int rc = 0;
down_write(&c->xattr_sem);
- BUG_ON(!xd->node);
+ if (xd->node != raw)
+ goto out;
+ if (is_xattr_datum_dead(xd) && (raw->next_in_ino == (void *)xd))
+ goto out;
old_ofs = ref_offset(xd->node);
totlen = ref_totlen(c, c->gcblock, xd->node);
- if (totlen < sizeof(struct jffs2_raw_xattr))
- goto out;
- if (!xd->xname) {
+ if (!is_xattr_datum_dead(xd)) {
rc = load_xattr_datum(c, xd);
- if (unlikely(rc > 0)) {
- delete_xattr_datum_node(c, xd);
- rc = 0;
- goto out;
- } else if (unlikely(rc < 0))
+ if (unlikely(rc < 0))
goto out;
}
+
rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE);
- if (rc || length < totlen) {
- JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, totlen);
+ if (rc) {
+ JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u\n", rc, totlen);
rc = rc ? rc : -EBADFD;
goto out;
}
@@ -1182,27 +1325,33 @@ int jffs2_garbage_collect_xattr_datum(st
dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x\n",
xd->xid, xd->version, old_ofs, ref_offset(xd->node));
out:
+ if (!rc)
+ jffs2_mark_node_obsolete(c, raw);
up_write(&c->xattr_sem);
return rc;
}
-int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
+int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,
+ struct jffs2_raw_node_ref *raw)
{
uint32_t totlen, length, old_ofs;
- int rc = -EINVAL;
+ int rc = 0;
down_write(&c->xattr_sem);
BUG_ON(!ref->node);
+ if (ref->node != raw)
+ goto out;
+ if (is_xattr_ref_dead(ref) && (raw->next_in_ino == (void *)ref))
+ goto out;
+
old_ofs = ref_offset(ref->node);
totlen = ref_totlen(c, c->gcblock, ref->node);
- if (totlen != sizeof(struct jffs2_raw_xref))
- goto out;
rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE);
- if (rc || length < totlen) {
- JFFS2_WARNING("%s: jffs2_reserve_space() = %d, request = %u\n",
+ if (rc) {
+ JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u\n",
__FUNCTION__, rc, totlen);
rc = rc ? rc : -EBADFD;
goto out;
@@ -1212,6 +1361,8 @@ int jffs2_garbage_collect_xattr_ref(stru
dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x\n",
ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node));
out:
+ if (!rc)
+ jffs2_mark_node_obsolete(c, raw);
up_write(&c->xattr_sem);
return rc;
}
@@ -1219,20 +1370,59 @@ int jffs2_garbage_collect_xattr_ref(stru
int jffs2_verify_xattr(struct jffs2_sb_info *c)
{
struct jffs2_xattr_datum *xd, *_xd;
+ struct jffs2_eraseblock *jeb;
+ struct jffs2_raw_node_ref *raw;
+ uint32_t totlen;
int rc;
down_write(&c->xattr_sem);
list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) {
rc = do_verify_xattr_datum(c, xd);
- if (rc == 0) {
- list_del_init(&xd->xindex);
- break;
- } else if (rc > 0) {
- list_del_init(&xd->xindex);
- delete_xattr_datum_node(c, xd);
+ if (rc < 0)
+ continue;
+ list_del_init(&xd->xindex);
+ spin_lock(&c->erase_completion_lock);
+ for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) {
+ if (ref_flags(raw) != REF_UNCHECKED)
+ continue;
+ jeb = &c->blocks[ref_offset(raw) / c->sector_size];
+ totlen = PAD(ref_totlen(c, jeb, raw));
+ c->unchecked_size -= totlen; c->used_size += totlen;
+ jeb->unchecked_size -= totlen; jeb->used_size += totlen;
+ raw->flash_offset = ref_offset(raw)
+ | ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL);
}
+ if (is_xattr_datum_dead(xd))
+ list_add(&xd->xindex, &c->xattr_dead_list);
+ spin_unlock(&c->erase_completion_lock);
}
up_write(&c->xattr_sem);
-
return list_empty(&c->xattr_unchecked) ? 1 : 0;
}
+
+void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)
+{
+ /* must be called under spin_lock(&c->erase_completion_lock) */
+ if (xd->node != (void *)xd)
+ return;
+
+ list_del(&xd->xindex);
+ jffs2_free_xattr_datum(xd);
+}
+
+void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
+{
+ /* must be called under spin_lock(&c->erase_completion_lock) */
+ struct jffs2_xattr_ref *tmp, **ptmp;
+
+ if (ref->node != (void *)ref)
+ return;
+
+ for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) {
+ if (ref == tmp) {
+ *ptmp = tmp->next;
+ jffs2_free_xattr_ref(ref);
+ break;
+ }
+ }
+}
diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
index 2c19985..06ab7b8 100644
--- a/fs/jffs2/xattr.h
+++ b/fs/jffs2/xattr.h
@@ -16,6 +16,7 @@ #include <linux/list.h>
#define JFFS2_XFLAGS_HOT (0x01) /* This datum is HOT */
#define JFFS2_XFLAGS_BIND (0x02) /* This datum is not reclaimed */
+#define JFFS2_XFLAGS_INVALID (0x80) /* This datum contains crc error */
struct jffs2_xattr_datum
{
@@ -23,7 +24,7 @@ struct jffs2_xattr_datum
struct jffs2_raw_node_ref *node;
uint8_t class;
uint8_t flags;
- uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */
+ uint16_t xprefix; /* see JFFS2_XATTR_PREFIX_* */
struct list_head xindex; /* chained from c->xattrindex[n] */
uint32_t refcnt; /* # of xattr_ref refers this */
@@ -47,6 +48,7 @@ struct jffs2_xattr_ref
uint8_t flags; /* Currently unused */
u16 unused;
+ uint32_t xseqno;
union {
struct jffs2_inode_cache *ic; /* reference to jffs2_inode_cache */
uint32_t ino; /* only used in scanning/building */
@@ -58,6 +60,34 @@ 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);
@@ -70,9 +100,13 @@ extern struct jffs2_xattr_datum *jffs2_s
extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
-extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
-extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
+extern int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,
+ struct jffs2_raw_node_ref *raw);
+extern int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,
+ struct jffs2_raw_node_ref *raw);
extern int jffs2_verify_xattr(struct jffs2_sb_info *c);
+extern void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd);
+extern void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref);
extern int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname,
char *buffer, size_t size);
diff --git a/include/linux/jffs2.h b/include/linux/jffs2.h
index c6f7066..c9c7607 100644
--- a/include/linux/jffs2.h
+++ b/include/linux/jffs2.h
@@ -186,6 +186,7 @@ struct jffs2_raw_xref
jint32_t hdr_crc;
jint32_t ino; /* inode number */
jint32_t xid; /* XATTR identifier number */
+ jint32_t xseqno; /* xref sequencial number */
jint32_t node_crc;
} __attribute__((packed));
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