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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-30 13:45:30 +0200
committerArtem Bityutskiy <dedekind1@gmail.com>2011-07-04 09:54:27 +0200
commitf42eed7cba7f83197b0ffbb023e7d89a0b2fd71d (patch)
treeb5590faffe190cd1401945e13c66684bec2f5b48
parentUBIFS: remove dead code (diff)
downloadlinux-f42eed7cba7f83197b0ffbb023e7d89a0b2fd71d.tar.xz
linux-f42eed7cba7f83197b0ffbb023e7d89a0b2fd71d.zip
UBIFS: harmonize znode flag helpers
We have 3 znode flags: cow, obsolete, dirty. For the last flag we have a 'ubifs_zn_dirty()' helper function, but for the other 2 flags we use 'test_bit()' directly. This patch makes the situation more consistent and introduces helpers for the other 2 flags: 'ubifs_zn_cow()' and 'ubifs_zn_obsolete()'. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
-rw-r--r--fs/ubifs/commit.c2
-rw-r--r--fs/ubifs/misc.h23
-rw-r--r--fs/ubifs/tnc.c13
-rw-r--r--fs/ubifs/tnc_commit.c8
4 files changed, 34 insertions, 12 deletions
diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index 8ab03d12d5c0..637e07673c3a 100644
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -78,7 +78,7 @@ static int nothing_to_commit(struct ubifs_info *c)
* If the root TNC node is dirty, we definitely have something to
* commit.
*/
- if (c->zroot.znode && test_bit(DIRTY_ZNODE, &c->zroot.znode->flags))
+ if (c->zroot.znode && ubifs_zn_dirty(c->zroot.znode))
return 0;
/*
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index 0b5296a9a4c5..160cd909e957 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -39,6 +39,29 @@ static inline int ubifs_zn_dirty(const struct ubifs_znode *znode)
}
/**
+ * ubifs_zn_obsolete - check if znode is obsolete.
+ * @znode: znode to check
+ *
+ * This helper function returns %1 if @znode is obsolete and %0 otherwise.
+ */
+static inline int ubifs_zn_obsolete(const struct ubifs_znode *znode)
+{
+ return !!test_bit(OBSOLETE_ZNODE, &znode->flags);
+}
+
+/**
+ * ubifs_zn_cow - check if znode has to be copied on write.
+ * @znode: znode to check
+ *
+ * This helper function returns %1 if @znode is has COW flag set and %0
+ * otherwise.
+ */
+static inline int ubifs_zn_cow(const struct ubifs_znode *znode)
+{
+ return !!test_bit(COW_ZNODE, &znode->flags);
+}
+
+/**
* ubifs_wake_up_bgt - wake up background thread.
* @c: UBIFS file-system description object
*/
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index 48b6ee6fa848..b32a5376b7b4 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -223,7 +223,7 @@ static struct ubifs_znode *copy_znode(struct ubifs_info *c,
__set_bit(DIRTY_ZNODE, &zn->flags);
__clear_bit(COW_ZNODE, &zn->flags);
- ubifs_assert(!test_bit(OBSOLETE_ZNODE, &znode->flags));
+ ubifs_assert(!ubifs_zn_obsolete(znode));
__set_bit(OBSOLETE_ZNODE, &znode->flags);
if (znode->level != 0) {
@@ -271,7 +271,7 @@ static struct ubifs_znode *dirty_cow_znode(struct ubifs_info *c,
struct ubifs_znode *zn;
int err;
- if (!test_bit(COW_ZNODE, &znode->flags)) {
+ if (!ubifs_zn_cow(znode)) {
/* znode is not being committed */
if (!test_and_set_bit(DIRTY_ZNODE, &znode->flags)) {
atomic_long_inc(&c->dirty_zn_cnt);
@@ -2423,7 +2423,7 @@ static int tnc_delete(struct ubifs_info *c, struct ubifs_znode *znode, int n)
*/
do {
- ubifs_assert(!test_bit(OBSOLETE_ZNODE, &znode->flags));
+ ubifs_assert(!ubifs_zn_obsolete(znode));
ubifs_assert(ubifs_zn_dirty(znode));
zp = znode->parent;
@@ -2479,9 +2479,8 @@ static int tnc_delete(struct ubifs_info *c, struct ubifs_znode *znode, int n)
c->zroot.offs = zbr->offs;
c->zroot.len = zbr->len;
c->zroot.znode = znode;
- ubifs_assert(!test_bit(OBSOLETE_ZNODE,
- &zp->flags));
- ubifs_assert(test_bit(DIRTY_ZNODE, &zp->flags));
+ ubifs_assert(!ubifs_zn_obsolete(zp));
+ ubifs_assert(ubifs_zn_dirty(zp));
atomic_long_dec(&c->dirty_zn_cnt);
if (zp->cnext) {
@@ -2865,7 +2864,7 @@ static void tnc_destroy_cnext(struct ubifs_info *c)
struct ubifs_znode *znode = cnext;
cnext = cnext->cnext;
- if (test_bit(OBSOLETE_ZNODE, &znode->flags))
+ if (ubifs_zn_obsolete(znode))
kfree(znode);
} while (cnext && cnext != c->cnext);
}
diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c
index 8315387be3fd..f50c3e5da263 100644
--- a/fs/ubifs/tnc_commit.c
+++ b/fs/ubifs/tnc_commit.c
@@ -87,7 +87,7 @@ static int make_idx_node(struct ubifs_info *c, struct ubifs_idx_node *idx,
atomic_long_dec(&c->dirty_zn_cnt);
ubifs_assert(ubifs_zn_dirty(znode));
- ubifs_assert(test_bit(COW_ZNODE, &znode->flags));
+ ubifs_assert(ubifs_zn_cow(znode));
__clear_bit(DIRTY_ZNODE, &znode->flags);
__clear_bit(COW_ZNODE, &znode->flags);
@@ -639,7 +639,7 @@ static int get_znodes_to_commit(struct ubifs_info *c)
}
cnt += 1;
while (1) {
- ubifs_assert(!test_bit(COW_ZNODE, &znode->flags));
+ ubifs_assert(!ubifs_zn_cow(znode));
__set_bit(COW_ZNODE, &znode->flags);
znode->alt = 0;
cnext = find_next_dirty(znode);
@@ -888,7 +888,7 @@ static int write_index(struct ubifs_info *c)
cnext = znode->cnext;
ubifs_assert(ubifs_zn_dirty(znode));
- ubifs_assert(test_bit(COW_ZNODE, &znode->flags));
+ ubifs_assert(ubifs_zn_cow(znode));
/*
* It is important that other threads should see %DIRTY_ZNODE
@@ -983,7 +983,7 @@ static void free_obsolete_znodes(struct ubifs_info *c)
do {
znode = cnext;
cnext = znode->cnext;
- if (test_bit(OBSOLETE_ZNODE, &znode->flags))
+ if (ubifs_zn_obsolete(znode))
kfree(znode);
else {
znode->cnext = NULL;