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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-06 17:52:32 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-16 14:12:12 +0300
commite11602ea3e43392904db7a579dc990062ebb7151 (patch)
tree3930553264a369773cc1f66aa33b790d17589a40 /fs/ubifs
parent91c66083fca36cdf496e927ef8bea19e6b1bbdce (diff)
downloadblackbird-op-linux-e11602ea3e43392904db7a579dc990062ebb7151.tar.gz
blackbird-op-linux-e11602ea3e43392904db7a579dc990062ebb7151.zip
UBIFS: share the next_log_lnum helper
We'll need to use the 'next_log_lnum()' helper function from log.c in the fixup code, so let's move it to misc.h. IOW, this is a preparation to the following free space fixup changes. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/log.c28
-rw-r--r--fs/ubifs/misc.h17
2 files changed, 24 insertions, 21 deletions
diff --git a/fs/ubifs/log.c b/fs/ubifs/log.c
index 40fa780ebea7..affea9494ae2 100644
--- a/fs/ubifs/log.c
+++ b/fs/ubifs/log.c
@@ -100,20 +100,6 @@ struct ubifs_wbuf *ubifs_get_wbuf(struct ubifs_info *c, int lnum)
}
/**
- * next_log_lnum - switch to the next log LEB.
- * @c: UBIFS file-system description object
- * @lnum: current log LEB
- */
-static inline int next_log_lnum(const struct ubifs_info *c, int lnum)
-{
- lnum += 1;
- if (lnum > c->log_last)
- lnum = UBIFS_LOG_LNUM;
-
- return lnum;
-}
-
-/**
* empty_log_bytes - calculate amount of empty space in the log.
* @c: UBIFS file-system description object
*/
@@ -257,7 +243,7 @@ int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs)
ref->jhead = cpu_to_le32(jhead);
if (c->lhead_offs > c->leb_size - c->ref_node_alsz) {
- c->lhead_lnum = next_log_lnum(c, c->lhead_lnum);
+ c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
c->lhead_offs = 0;
}
@@ -425,7 +411,7 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
/* Switch to the next log LEB */
if (c->lhead_offs) {
- c->lhead_lnum = next_log_lnum(c, c->lhead_lnum);
+ c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
c->lhead_offs = 0;
}
@@ -446,7 +432,7 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
c->lhead_offs += len;
if (c->lhead_offs == c->leb_size) {
- c->lhead_lnum = next_log_lnum(c, c->lhead_lnum);
+ c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
c->lhead_offs = 0;
}
@@ -533,7 +519,7 @@ int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum)
}
mutex_lock(&c->log_mutex);
for (lnum = old_ltail_lnum; lnum != c->ltail_lnum;
- lnum = next_log_lnum(c, lnum)) {
+ lnum = ubifs_next_log_lnum(c, lnum)) {
dbg_log("unmap log LEB %d", lnum);
err = ubifs_leb_unmap(c, lnum);
if (err)
@@ -642,7 +628,7 @@ static int add_node(struct ubifs_info *c, void *buf, int *lnum, int *offs,
err = ubifs_leb_change(c, *lnum, buf, sz, UBI_SHORTTERM);
if (err)
return err;
- *lnum = next_log_lnum(c, *lnum);
+ *lnum = ubifs_next_log_lnum(c, *lnum);
*offs = 0;
}
memcpy(buf + *offs, node, len);
@@ -712,7 +698,7 @@ int ubifs_consolidate_log(struct ubifs_info *c)
ubifs_scan_destroy(sleb);
if (lnum == c->lhead_lnum)
break;
- lnum = next_log_lnum(c, lnum);
+ lnum = ubifs_next_log_lnum(c, lnum);
}
if (offs) {
int sz = ALIGN(offs, c->min_io_size);
@@ -732,7 +718,7 @@ int ubifs_consolidate_log(struct ubifs_info *c)
/* Unmap remaining LEBs */
lnum = write_lnum;
do {
- lnum = next_log_lnum(c, lnum);
+ lnum = ubifs_next_log_lnum(c, lnum);
err = ubifs_leb_unmap(c, lnum);
if (err)
return err;
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index c3de04dc952a..0b5296a9a4c5 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -340,4 +340,21 @@ static inline void ubifs_release_lprops(struct ubifs_info *c)
mutex_unlock(&c->lp_mutex);
}
+/**
+ * ubifs_next_log_lnum - switch to the next log LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: current log LEB
+ *
+ * This helper function returns the log LEB number which goes next after LEB
+ * 'lnum'.
+ */
+static inline int ubifs_next_log_lnum(const struct ubifs_info *c, int lnum)
+{
+ lnum += 1;
+ if (lnum > c->log_last)
+ lnum = UBIFS_LOG_LNUM;
+
+ return lnum;
+}
+
#endif /* __UBIFS_MISC_H__ */
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