summaryrefslogtreecommitdiffstats
path: root/fs/ubifs/lprops.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ubifs/lprops.c')
-rw-r--r--fs/ubifs/lprops.c43
1 files changed, 20 insertions, 23 deletions
diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
index 4cdd284..4d4ca38 100644
--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -281,7 +281,7 @@ void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
case LPROPS_FREE:
if (add_to_lpt_heap(c, lprops, cat))
break;
- /* No more room on heap so make it uncategorized */
+ /* No more room on heap so make it un-categorized */
cat = LPROPS_UNCAT;
/* Fall through */
case LPROPS_UNCAT:
@@ -375,8 +375,8 @@ void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops,
* @lprops: LEB properties
*
* A LEB may have fallen off of the bottom of a heap, and ended up as
- * uncategorized even though it has enough space for us now. If that is the case
- * this function will put the LEB back onto a heap.
+ * un-categorized even though it has enough space for us now. If that is the
+ * case this function will put the LEB back onto a heap.
*/
void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops)
{
@@ -436,10 +436,10 @@ int ubifs_categorize_lprops(const struct ubifs_info *c,
/**
* change_category - change LEB properties category.
* @c: UBIFS file-system description object
- * @lprops: LEB properties to recategorize
+ * @lprops: LEB properties to re-categorize
*
* LEB properties are categorized to enable fast find operations. When the LEB
- * properties change they must be recategorized.
+ * properties change they must be re-categorized.
*/
static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops)
{
@@ -461,21 +461,18 @@ static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops)
}
/**
- * calc_dark - calculate LEB dark space size.
+ * ubifs_calc_dark - calculate LEB dark space size.
* @c: the UBIFS file-system description object
* @spc: amount of free and dirty space in the LEB
*
- * This function calculates amount of dark space in an LEB which has @spc bytes
- * of free and dirty space. Returns the calculations result.
+ * This function calculates and returns amount of dark space in an LEB which
+ * has @spc bytes of free and dirty space.
*
- * Dark space is the space which is not always usable - it depends on which
- * nodes are written in which order. E.g., if an LEB has only 512 free bytes,
- * it is dark space, because it cannot fit a large data node. So UBIFS cannot
- * count on this LEB and treat these 512 bytes as usable because it is not true
- * if, for example, only big chunks of uncompressible data will be written to
- * the FS.
+ * UBIFS is trying to account the space which might not be usable, and this
+ * space is called "dark space". For example, if an LEB has only %512 free
+ * bytes, it is dark space, because it cannot fit a large data node.
*/
-static int calc_dark(struct ubifs_info *c, int spc)
+int ubifs_calc_dark(const struct ubifs_info *c, int spc)
{
ubifs_assert(!(spc & 7));
@@ -518,7 +515,7 @@ static int is_lprops_dirty(struct ubifs_info *c, struct ubifs_lprops *lprops)
* @free: new free space amount
* @dirty: new dirty space amount
* @flags: new flags
- * @idx_gc_cnt: change to the count of idx_gc list
+ * @idx_gc_cnt: change to the count of @idx_gc list
*
* This function changes LEB properties (@free, @dirty or @flag). However, the
* property which has the %LPROPS_NC value is not changed. Returns a pointer to
@@ -535,7 +532,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
{
/*
* This is the only function that is allowed to change lprops, so we
- * discard the const qualifier.
+ * discard the "const" qualifier.
*/
struct ubifs_lprops *lprops = (struct ubifs_lprops *)lp;
@@ -575,7 +572,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
if (old_spc < c->dead_wm)
c->lst.total_dead -= old_spc;
else
- c->lst.total_dark -= calc_dark(c, old_spc);
+ c->lst.total_dark -= ubifs_calc_dark(c, old_spc);
c->lst.total_used -= c->leb_size - old_spc;
}
@@ -616,7 +613,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
if (new_spc < c->dead_wm)
c->lst.total_dead += new_spc;
else
- c->lst.total_dark += calc_dark(c, new_spc);
+ c->lst.total_dark += ubifs_calc_dark(c, new_spc);
c->lst.total_used += c->leb_size - new_spc;
}
@@ -1096,7 +1093,7 @@ static int scan_check_cb(struct ubifs_info *c,
}
}
- sleb = ubifs_scan(c, lnum, 0, c->dbg->buf);
+ sleb = ubifs_scan(c, lnum, 0, c->dbg->buf, 0);
if (IS_ERR(sleb)) {
/*
* After an unclean unmount, empty and freeable LEBs
@@ -1107,7 +1104,7 @@ static int scan_check_cb(struct ubifs_info *c,
"- continuing checking");
lst->empty_lebs += 1;
lst->total_free += c->leb_size;
- lst->total_dark += calc_dark(c, c->leb_size);
+ lst->total_dark += ubifs_calc_dark(c, c->leb_size);
return LPT_SCAN_CONTINUE;
}
@@ -1117,7 +1114,7 @@ static int scan_check_cb(struct ubifs_info *c,
"- continuing checking");
lst->total_free += lp->free;
lst->total_dirty += lp->dirty;
- lst->total_dark += calc_dark(c, c->leb_size);
+ lst->total_dark += ubifs_calc_dark(c, c->leb_size);
return LPT_SCAN_CONTINUE;
}
data->err = PTR_ERR(sleb);
@@ -1235,7 +1232,7 @@ static int scan_check_cb(struct ubifs_info *c,
if (spc < c->dead_wm)
lst->total_dead += spc;
else
- lst->total_dark += calc_dark(c, spc);
+ lst->total_dark += ubifs_calc_dark(c, spc);
}
ubifs_scan_destroy(sleb);
OpenPOWER on IntegriCloud