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authorDavid Woodhouse <dwmw2@infradead.org>2006-05-22 16:32:05 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2006-05-22 16:32:05 +0100
commit987d47b71a85bd83dc40c870abee3b64f2002163 (patch)
treeecb840640cb1f7309b26d2c9a332bee5d0db6df9 /fs/jffs2/nodelist.h
parent0eac940b8a087576c66ecf8e0f294f2ceb3b607b (diff)
downloadop-kernel-dev-987d47b71a85bd83dc40c870abee3b64f2002163.zip
op-kernel-dev-987d47b71a85bd83dc40c870abee3b64f2002163.tar.gz
[JFFS2] Put list of nodes in common part of ic/x_ref/x_datum structure
We'll be using a proper list of nodes in the jffs2_xattr_datum and jffs2_xattr_ref structures, because the existing code to overwrite them is just broken. Put it in the common part at the front of the structure which is shared with the jffs2_inode_cache, so that the jffs2_link_node_ref() function can do the right thing. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2/nodelist.h')
-rw-r--r--fs/jffs2/nodelist.h44
1 files changed, 27 insertions, 17 deletions
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index ee5aedc..1e1c39d 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -77,9 +77,9 @@
struct jffs2_raw_node_ref
{
struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref
- for this inode. If this is the last, it points to the inode_cache
- for this inode instead. The inode_cache will have NULL in the first
- word so you know when you've got there :) */
+ for this object. If this _is_ the last, it points to the inode_cache,
+ xattr_ref or xattr_datum instead. The common part of those structures
+ has NULL in the first word. See jffs2_raw_ref_to_ic() below */
struct jffs2_raw_node_ref *next_phys;
uint32_t flash_offset;
#define TEST_TOTLEN
@@ -88,6 +88,18 @@ struct jffs2_raw_node_ref
#endif
};
+static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
+{
+ while(raw->next_in_ino) {
+ raw = raw->next_in_ino;
+ }
+
+ /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and
+ not actually a jffs2_inode_cache. Check ->class */
+ return ((struct jffs2_inode_cache *)raw);
+}
+
+
/* flash_offset & 3 always has to be zero, because nodes are
always aligned at 4 bytes. So we have a couple of extra bits
to play with, which indicate the node's status; see below: */
@@ -113,20 +125,27 @@ struct jffs2_raw_node_ref
a pointer to the first physical node which is part of this inode, too.
*/
struct jffs2_inode_cache {
+ /* First part of structure is shared with other objects which
+ can terminate the raw node refs' next_in_ino list -- which
+ currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */
+
struct jffs2_full_dirent *scan_dents; /* Used during scan to hold
temporary lists of dirents, and later must be set to
NULL to mark the end of the raw_node_ref->next_in_ino
chain. */
- u8 class; /* It's used for identification */
- u8 flags;
- uint16_t state;
- struct jffs2_inode_cache *next;
struct jffs2_raw_node_ref *nodes;
+ uint8_t class; /* It's used for identification */
+
+ /* end of shared structure */
+
+ uint8_t flags;
+ uint16_t state;
uint32_t ino;
- int nlink;
+ struct jffs2_inode_cache *next;
#ifdef CONFIG_JFFS2_FS_XATTR
struct jffs2_xattr_ref *xref;
#endif
+ int nlink;
};
/* Inode states for 'state' above. We need the 'GC' state to prevent
@@ -250,15 +269,6 @@ static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
}
}
-static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
-{
- while(raw->next_in_ino) {
- raw = raw->next_in_ino;
- }
-
- return ((struct jffs2_inode_cache *)raw);
-}
-
static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
{
struct rb_node *node = root->rb_node;
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