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authorDavid Woodhouse <dwmw2@infradead.org>2006-05-24 02:04:45 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2006-05-24 02:04:45 +0100
commit2f785402f39b96a077b6e62bf26164bfb8e0c980 (patch)
tree3f3a38b484ef2dabda1599d4d8f08b121bd03a76 /fs/jffs2/scan.c
parent4cbb9b80e171107c6c34116283fe38e5a396c68b (diff)
downloadlinux-linaro-2f785402f39b96a077b6e62bf26164bfb8e0c980.tar.gz
[JFFS2] Reduce visibility of raw_node_ref to upper layers of JFFS2 code.
As the first step towards eliminating the ref->next_phys member and saving memory by using an _array_ of struct jffs2_raw_node_ref per eraseblock, stop the write functions from allocating their own refs; have them just _reserve_ the appropriate number instead. Then jffs2_link_node_ref() can just fill them in. Use a linked list of pre-allocated refs in the superblock, for now. Once we switch to an array, it'll just be a case of extending that array. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2/scan.c')
-rw-r--r--fs/jffs2/scan.c77
1 files changed, 14 insertions, 63 deletions
diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 6fce703c054..87b0a416b6a 100644
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -317,7 +317,6 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
struct jffs2_summary *s)
{
struct jffs2_xattr_datum *xd;
- struct jffs2_raw_node_ref *raw;
uint32_t totlen, crc;
int err;
@@ -340,13 +339,8 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
return 0;
}
- raw = jffs2_alloc_raw_node_ref();
- if (!raw)
- return -ENOMEM;
-
xd = jffs2_setup_xattr_datum(c, je32_to_cpu(rx->xid), je32_to_cpu(rx->version));
if (IS_ERR(xd)) {
- jffs2_free_raw_node_ref(raw);
if (PTR_ERR(xd) == -EEXIST) {
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rx->totlen)))))
return err;
@@ -358,12 +352,9 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
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 = raw;
-
- raw->flash_offset = ofs | REF_PRISTINE;
- jffs2_link_node_ref(c, jeb, raw, totlen, NULL);
- /* FIXME */ raw->next_in_ino = (void *)xd;
+ xd->node = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, NULL);
+ /* FIXME */ xd->node->next_in_ino = (void *)xd;
if (jffs2_sum_active())
jffs2_sum_add_xattr_mem(s, rx, ofs - jeb->offset);
@@ -377,7 +368,6 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
struct jffs2_summary *s)
{
struct jffs2_xattr_ref *ref;
- struct jffs2_raw_node_ref *raw;
uint32_t crc;
int err;
@@ -404,12 +394,6 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
if (!ref)
return -ENOMEM;
- raw = jffs2_alloc_raw_node_ref();
- if (!raw) {
- jffs2_free_xattr_ref(ref);
- return -ENOMEM;
- }
-
/* BEFORE jffs2_build_xattr_subsystem() called,
* 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
@@ -418,16 +402,13 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
* used to chain all xattr_ref object. It's re-chained to
* jffs2_inode_cache in jffs2_build_xattr_subsystem() correctly.
*/
- ref->node = raw;
ref->ino = je32_to_cpu(rr->ino);
ref->xid = je32_to_cpu(rr->xid);
ref->next = c->xref_temp;
c->xref_temp = ref;
- raw->flash_offset = ofs | REF_PRISTINE;
-
- jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(rr->totlen)), NULL);
- /* FIXME */ raw->next_in_ino = (void *)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;
if (jffs2_sum_active())
jffs2_sum_add_xref_mem(s, rr, ofs - jeb->offset);
@@ -597,6 +578,11 @@ scan_more:
jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
+ /* Make sure there are node refs available for use */
+ err = jffs2_prealloc_raw_node_refs(c, 2);
+ if (err)
+ return err;
+
cond_resched();
if (ofs & 3) {
@@ -839,14 +825,7 @@ scan_more:
return err;
ofs += PAD(sizeof(struct jffs2_unknown_node));
} else {
- struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
- if (!marker_ref) {
- printk(KERN_NOTICE "Failed to allocate node ref for clean marker\n");
- return -ENOMEM;
- }
- marker_ref->flash_offset = ofs | REF_NORMAL;
-
- jffs2_link_node_ref(c, jeb, marker_ref, c->cleanmarker_size, NULL);
+ jffs2_link_node_ref(c, jeb, ofs | REF_NORMAL, c->cleanmarker_size, NULL);
ofs += PAD(c->cleanmarker_size);
}
@@ -884,14 +863,9 @@ scan_more:
break;
case JFFS2_FEATURE_RWCOMPAT_COPY: {
- struct jffs2_raw_node_ref *ref;
D1(printk(KERN_NOTICE "Unknown but compatible feature node (0x%04x) found at offset 0x%08x\n", je16_to_cpu(node->nodetype), ofs));
- ref = jffs2_alloc_raw_node_ref();
- if (!ref)
- return -ENOMEM;
- ref->flash_offset = ofs | REF_PRISTINE;
- jffs2_link_node_ref(c, jeb, ref, PAD(je32_to_cpu(node->totlen)), NULL);
+ jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(node->totlen)), NULL);
/* We can't summarise nodes we don't grok */
jffs2_sum_disable_collecting(s);
@@ -953,7 +927,6 @@ struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uin
static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_inode *ri, uint32_t ofs, struct jffs2_summary *s)
{
- struct jffs2_raw_node_ref *raw;
struct jffs2_inode_cache *ic;
uint32_t ino = je32_to_cpu(ri->ino);
int err;
@@ -969,12 +942,6 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
Which means that the _full_ amount of time to get to proper write mode with GC
operational may actually be _longer_ than before. Sucks to be me. */
- raw = jffs2_alloc_raw_node_ref();
- if (!raw) {
- printk(KERN_NOTICE "jffs2_scan_inode_node(): allocation of node reference failed\n");
- return -ENOMEM;
- }
-
ic = jffs2_get_ino_cache(c, ino);
if (!ic) {
/* Inocache get failed. Either we read a bogus ino# or it's just genuinely the
@@ -988,21 +955,15 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
/* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(ri->totlen)))))
return err;
- jffs2_free_raw_node_ref(raw);
return 0;
}
ic = jffs2_scan_make_ino_cache(c, ino);
- if (!ic) {
- jffs2_free_raw_node_ref(raw);
+ if (!ic)
return -ENOMEM;
- }
}
/* Wheee. It worked */
-
- raw->flash_offset = ofs | REF_UNCHECKED;
-
- jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(ri->totlen)), ic);
+ jffs2_link_node_ref(c, jeb, ofs | REF_UNCHECKED, PAD(je32_to_cpu(ri->totlen)), ic);
D1(printk(KERN_DEBUG "Node is ino #%u, version %d. Range 0x%x-0x%x\n",
je32_to_cpu(ri->ino), je32_to_cpu(ri->version),
@@ -1021,7 +982,6 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs, struct jffs2_summary *s)
{
- struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
uint32_t crc;
@@ -1063,23 +1023,14 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
return err;
return 0;
}
- raw = jffs2_alloc_raw_node_ref();
- if (!raw) {
- jffs2_free_full_dirent(fd);
- printk(KERN_NOTICE "jffs2_scan_dirent_node(): allocation of node reference failed\n");
- return -ENOMEM;
- }
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(rd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
- jffs2_free_raw_node_ref(raw);
return -ENOMEM;
}
- raw->flash_offset = ofs | REF_PRISTINE;
- jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(rd->totlen)), ic);
+ fd->raw = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(rd->totlen)), ic);
- fd->raw = raw;
fd->next = NULL;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);