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Diffstat (limited to 'fs/ubifs/lpt_commit.c')
-rw-r--r--fs/ubifs/lpt_commit.c210
1 files changed, 173 insertions, 37 deletions
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index a41434b4278..96ca9570717 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -320,6 +320,8 @@ no_space:
dbg_err("LPT out of space at LEB %d:%d needing %d, done_ltab %d, "
"done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
dbg_dump_lpt_info(c);
+ dbg_dump_lpt_lebs(c);
+ dump_stack();
return err;
}
@@ -546,8 +548,10 @@ static int write_cnodes(struct ubifs_info *c)
no_space:
ubifs_err("LPT out of space mismatch");
dbg_err("LPT out of space mismatch at LEB %d:%d needing %d, done_ltab "
- "%d, done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
+ "%d, done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
dbg_dump_lpt_info(c);
+ dbg_dump_lpt_lebs(c);
+ dump_stack();
return err;
}
@@ -749,7 +753,7 @@ static void lpt_tgc_start(struct ubifs_info *c)
* LPT trivial garbage collection is where a LPT LEB contains only dirty and
* free space and so may be reused as soon as the next commit is completed.
* This function is called after the commit is completed (master node has been
- * written) and unmaps LPT LEBs that were marked for trivial GC.
+ * written) and un-maps LPT LEBs that were marked for trivial GC.
*/
static int lpt_tgc_end(struct ubifs_info *c)
{
@@ -1025,7 +1029,7 @@ static int make_node_dirty(struct ubifs_info *c, int node_type, int node_num,
* @c: UBIFS file-system description object
* @node_type: LPT node type
*/
-static int get_lpt_node_len(struct ubifs_info *c, int node_type)
+static int get_lpt_node_len(const struct ubifs_info *c, int node_type)
{
switch (node_type) {
case UBIFS_LPT_NNODE:
@@ -1046,7 +1050,7 @@ static int get_lpt_node_len(struct ubifs_info *c, int node_type)
* @buf: buffer
* @len: length of buffer
*/
-static int get_pad_len(struct ubifs_info *c, uint8_t *buf, int len)
+static int get_pad_len(const struct ubifs_info *c, uint8_t *buf, int len)
{
int offs, pad_len;
@@ -1063,7 +1067,8 @@ static int get_pad_len(struct ubifs_info *c, uint8_t *buf, int len)
* @buf: buffer
* @node_num: node number is returned here
*/
-static int get_lpt_node_type(struct ubifs_info *c, uint8_t *buf, int *node_num)
+static int get_lpt_node_type(const struct ubifs_info *c, uint8_t *buf,
+ int *node_num)
{
uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
int pos = 0, node_type;
@@ -1081,7 +1086,7 @@ static int get_lpt_node_type(struct ubifs_info *c, uint8_t *buf, int *node_num)
*
* This function returns %1 if the buffer contains a node or %0 if it does not.
*/
-static int is_a_node(struct ubifs_info *c, uint8_t *buf, int len)
+static int is_a_node(const struct ubifs_info *c, uint8_t *buf, int len)
{
uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
int pos = 0, node_type, node_len;
@@ -1105,7 +1110,6 @@ static int is_a_node(struct ubifs_info *c, uint8_t *buf, int len)
return 1;
}
-
/**
* lpt_gc_lnum - garbage collect a LPT LEB.
* @c: UBIFS file-system description object
@@ -1463,7 +1467,7 @@ void ubifs_lpt_free(struct ubifs_info *c, int wr_only)
#ifdef CONFIG_UBIFS_FS_DEBUG
/**
- * dbg_is_all_ff - determine if a buffer contains only 0xff bytes.
+ * dbg_is_all_ff - determine if a buffer contains only 0xFF bytes.
* @buf: buffer
* @len: buffer length
*/
@@ -1488,7 +1492,7 @@ static int dbg_is_nnode_dirty(struct ubifs_info *c, int lnum, int offs)
struct ubifs_nnode *nnode;
int hght;
- /* Entire tree is in memory so first_nnode / next_nnode are ok */
+ /* Entire tree is in memory so first_nnode / next_nnode are OK */
nnode = first_nnode(c, &hght);
for (; nnode; nnode = next_nnode(c, nnode, &hght)) {
struct ubifs_nbranch *branch;
@@ -1602,7 +1606,10 @@ static int dbg_check_ltab_lnum(struct ubifs_info *c, int lnum)
{
int err, len = c->leb_size, dirty = 0, node_type, node_num, node_len;
int ret;
- void *buf = c->dbg_buf;
+ void *buf = c->dbg->buf;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_LPROPS))
+ return 0;
dbg_lp("LEB %d", lnum);
err = ubi_read(c->ubi, lnum, buf, 0, c->leb_size);
@@ -1704,6 +1711,9 @@ int dbg_chk_lpt_free_spc(struct ubifs_info *c)
long long free = 0;
int i;
+ if (!(ubifs_chk_flags & UBIFS_CHK_LPROPS))
+ return 0;
+
for (i = 0; i < c->lpt_lebs; i++) {
if (c->ltab[i].tgc || c->ltab[i].cmt)
continue;
@@ -1716,6 +1726,8 @@ int dbg_chk_lpt_free_spc(struct ubifs_info *c)
dbg_err("LPT space error: free %lld lpt_sz %lld",
free, c->lpt_sz);
dbg_dump_lpt_info(c);
+ dbg_dump_lpt_lebs(c);
+ dump_stack();
return -EINVAL;
}
return 0;
@@ -1731,15 +1743,19 @@ int dbg_chk_lpt_free_spc(struct ubifs_info *c)
*/
int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len)
{
+ struct ubifs_debug_info *d = c->dbg;
long long chk_lpt_sz, lpt_sz;
int err = 0;
+ if (!(ubifs_chk_flags & UBIFS_CHK_LPROPS))
+ return 0;
+
switch (action) {
case 0:
- c->chk_lpt_sz = 0;
- c->chk_lpt_sz2 = 0;
- c->chk_lpt_lebs = 0;
- c->chk_lpt_wastage = 0;
+ d->chk_lpt_sz = 0;
+ d->chk_lpt_sz2 = 0;
+ d->chk_lpt_lebs = 0;
+ d->chk_lpt_wastage = 0;
if (c->dirty_pn_cnt > c->pnode_cnt) {
dbg_err("dirty pnodes %d exceed max %d",
c->dirty_pn_cnt, c->pnode_cnt);
@@ -1752,35 +1768,35 @@ int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len)
}
return err;
case 1:
- c->chk_lpt_sz += len;
+ d->chk_lpt_sz += len;
return 0;
case 2:
- c->chk_lpt_sz += len;
- c->chk_lpt_wastage += len;
- c->chk_lpt_lebs += 1;
+ d->chk_lpt_sz += len;
+ d->chk_lpt_wastage += len;
+ d->chk_lpt_lebs += 1;
return 0;
case 3:
chk_lpt_sz = c->leb_size;
- chk_lpt_sz *= c->chk_lpt_lebs;
+ chk_lpt_sz *= d->chk_lpt_lebs;
chk_lpt_sz += len - c->nhead_offs;
- if (c->chk_lpt_sz != chk_lpt_sz) {
+ if (d->chk_lpt_sz != chk_lpt_sz) {
dbg_err("LPT wrote %lld but space used was %lld",
- c->chk_lpt_sz, chk_lpt_sz);
+ d->chk_lpt_sz, chk_lpt_sz);
err = -EINVAL;
}
- if (c->chk_lpt_sz > c->lpt_sz) {
+ if (d->chk_lpt_sz > c->lpt_sz) {
dbg_err("LPT wrote %lld but lpt_sz is %lld",
- c->chk_lpt_sz, c->lpt_sz);
+ d->chk_lpt_sz, c->lpt_sz);
err = -EINVAL;
}
- if (c->chk_lpt_sz2 && c->chk_lpt_sz != c->chk_lpt_sz2) {
+ if (d->chk_lpt_sz2 && d->chk_lpt_sz != d->chk_lpt_sz2) {
dbg_err("LPT layout size %lld but wrote %lld",
- c->chk_lpt_sz, c->chk_lpt_sz2);
+ d->chk_lpt_sz, d->chk_lpt_sz2);
err = -EINVAL;
}
- if (c->chk_lpt_sz2 && c->new_nhead_offs != len) {
+ if (d->chk_lpt_sz2 && d->new_nhead_offs != len) {
dbg_err("LPT new nhead offs: expected %d was %d",
- c->new_nhead_offs, len);
+ d->new_nhead_offs, len);
err = -EINVAL;
}
lpt_sz = (long long)c->pnode_cnt * c->pnode_sz;
@@ -1788,26 +1804,146 @@ int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len)
lpt_sz += c->ltab_sz;
if (c->big_lpt)
lpt_sz += c->lsave_sz;
- if (c->chk_lpt_sz - c->chk_lpt_wastage > lpt_sz) {
+ if (d->chk_lpt_sz - d->chk_lpt_wastage > lpt_sz) {
dbg_err("LPT chk_lpt_sz %lld + waste %lld exceeds %lld",
- c->chk_lpt_sz, c->chk_lpt_wastage, lpt_sz);
+ d->chk_lpt_sz, d->chk_lpt_wastage, lpt_sz);
err = -EINVAL;
}
- if (err)
+ if (err) {
dbg_dump_lpt_info(c);
- c->chk_lpt_sz2 = c->chk_lpt_sz;
- c->chk_lpt_sz = 0;
- c->chk_lpt_wastage = 0;
- c->chk_lpt_lebs = 0;
- c->new_nhead_offs = len;
+ dbg_dump_lpt_lebs(c);
+ dump_stack();
+ }
+ d->chk_lpt_sz2 = d->chk_lpt_sz;
+ d->chk_lpt_sz = 0;
+ d->chk_lpt_wastage = 0;
+ d->chk_lpt_lebs = 0;
+ d->new_nhead_offs = len;
return err;
case 4:
- c->chk_lpt_sz += len;
- c->chk_lpt_wastage += len;
+ d->chk_lpt_sz += len;
+ d->chk_lpt_wastage += len;
return 0;
default:
return -EINVAL;
}
}
+/**
+ * dbg_dump_lpt_leb - dump an LPT LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to dump
+ *
+ * This function dumps an LEB from LPT area. Nodes in this area are very
+ * different to nodes in the main area (e.g., they do not have common headers,
+ * they do not have 8-byte alignments, etc), so we have a separate function to
+ * dump LPT area LEBs. Note, LPT has to be locked by the caller.
+ */
+static void dump_lpt_leb(const struct ubifs_info *c, int lnum)
+{
+ int err, len = c->leb_size, node_type, node_num, node_len, offs;
+ void *buf = c->dbg->buf;
+
+ printk(KERN_DEBUG "(pid %d) start dumping LEB %d\n",
+ current->pid, lnum);
+ err = ubi_read(c->ubi, lnum, buf, 0, c->leb_size);
+ if (err) {
+ ubifs_err("cannot read LEB %d, error %d", lnum, err);
+ return;
+ }
+ while (1) {
+ offs = c->leb_size - len;
+ if (!is_a_node(c, buf, len)) {
+ int pad_len;
+
+ pad_len = get_pad_len(c, buf, len);
+ if (pad_len) {
+ printk(KERN_DEBUG "LEB %d:%d, pad %d bytes\n",
+ lnum, offs, pad_len);
+ buf += pad_len;
+ len -= pad_len;
+ continue;
+ }
+ if (len)
+ printk(KERN_DEBUG "LEB %d:%d, free %d bytes\n",
+ lnum, offs, len);
+ break;
+ }
+
+ node_type = get_lpt_node_type(c, buf, &node_num);
+ switch (node_type) {
+ case UBIFS_LPT_PNODE:
+ {
+ node_len = c->pnode_sz;
+ if (c->big_lpt)
+ printk(KERN_DEBUG "LEB %d:%d, pnode num %d\n",
+ lnum, offs, node_num);
+ else
+ printk(KERN_DEBUG "LEB %d:%d, pnode\n",
+ lnum, offs);
+ break;
+ }
+ case UBIFS_LPT_NNODE:
+ {
+ int i;
+ struct ubifs_nnode nnode;
+
+ node_len = c->nnode_sz;
+ if (c->big_lpt)
+ printk(KERN_DEBUG "LEB %d:%d, nnode num %d, ",
+ lnum, offs, node_num);
+ else
+ printk(KERN_DEBUG "LEB %d:%d, nnode, ",
+ lnum, offs);
+ err = ubifs_unpack_nnode(c, buf, &nnode);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ printk("%d:%d", nnode.nbranch[i].lnum,
+ nnode.nbranch[i].offs);
+ if (i != UBIFS_LPT_FANOUT - 1)
+ printk(", ");
+ }
+ printk("\n");
+ break;
+ }
+ case UBIFS_LPT_LTAB:
+ node_len = c->ltab_sz;
+ printk(KERN_DEBUG "LEB %d:%d, ltab\n",
+ lnum, offs);
+ break;
+ case UBIFS_LPT_LSAVE:
+ node_len = c->lsave_sz;
+ printk(KERN_DEBUG "LEB %d:%d, lsave len\n", lnum, offs);
+ break;
+ default:
+ ubifs_err("LPT node type %d not recognized", node_type);
+ return;
+ }
+
+ buf += node_len;
+ len -= node_len;
+ }
+
+ printk(KERN_DEBUG "(pid %d) finish dumping LEB %d\n",
+ current->pid, lnum);
+}
+
+/**
+ * dbg_dump_lpt_lebs - dump LPT lebs.
+ * @c: UBIFS file-system description object
+ *
+ * This function dumps all LPT LEBs. The caller has to make sure the LPT is
+ * locked.
+ */
+void dbg_dump_lpt_lebs(const struct ubifs_info *c)
+{
+ int i;
+
+ printk(KERN_DEBUG "(pid %d) start dumping all LPT LEBs\n",
+ current->pid);
+ for (i = 0; i < c->lpt_lebs; i++)
+ dump_lpt_leb(c, i + c->lpt_first);
+ printk(KERN_DEBUG "(pid %d) finish dumping all LPT LEBs\n",
+ current->pid);
+}
+
#endif /* CONFIG_UBIFS_FS_DEBUG */