1 files changed, 115 insertions, 75 deletions

diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 23a67bb3052f..b16c60bbcf6e 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -18,8 +18,10 @@
 #include <linux/fs.h>
 #include <linux/types.h>
 #include <linux/jffs2.h>
-#include <linux/jffs2_fs_sb.h>
-#include <linux/jffs2_fs_i.h>
+#include "jffs2_fs_sb.h"
+#include "jffs2_fs_i.h"
+#include "xattr.h"
+#include "acl.h"
 #include "summary.h"
 
 #ifdef __ECOS
@@ -75,14 +77,50 @@
 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 :) */
-        struct jffs2_raw_node_ref *next_phys;
+                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 */
         uint32_t flash_offset;
+#define TEST_TOTLEN
+#ifdef TEST_TOTLEN
         uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */
+#endif
 };
 
+#define REF_LINK_NODE ((int32_t)-1)
+#define REF_EMPTY_NODE ((int32_t)-2)
+
+/* Use blocks of about 256 bytes */
+#define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1)
+
+static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref)
+{
+        ref++;
+
+        /* Link to another block of refs */
+        if (ref->flash_offset == REF_LINK_NODE) {
+                ref = ref->next_in_ino;
+                if (!ref)
+                        return ref;
+        }
+
+        /* End of chain */
+        if (ref->flash_offset == REF_EMPTY_NODE)
+                return NULL;
+
+        return ref;
+}
+
+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: */
@@ -95,6 +133,11 @@ struct jffs2_raw_node_ref
 #define ref_obsolete(ref)       (((ref)->flash_offset & 3) == REF_OBSOLETE)
 #define mark_ref_normal(ref)    do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
 
+/* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates
+   it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get
+   copied. If you need to do anything different to GC inode-less nodes, then
+   you need to modify gc.c accordingly. */
+
 /* For each inode in the filesystem, we need to keep a record of
    nlink, because it would be a PITA to scan the whole directory tree
    at read_inode() time to calculate it, and to keep sufficient information
@@ -103,15 +146,27 @@ 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. */
-        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;
+        struct jffs2_inode_cache *next;
+#ifdef CONFIG_JFFS2_FS_XATTR
+        struct jffs2_xattr_ref *xref;
+#endif
         int nlink;
-        int state;
 };
 
 /* Inode states for 'state' above. We need the 'GC' state to prevent
@@ -125,8 +180,16 @@ struct jffs2_inode_cache {
 #define INO_STATE_READING       5       /* In read_inode() */
 #define INO_STATE_CLEARING      6       /* In clear_inode() */
 
+#define INO_FLAGS_XATTR_CHECKED 0x01    /* has no duplicate xattr_ref */
+
+#define RAWNODE_CLASS_INODE_CACHE       0
+#define RAWNODE_CLASS_XATTR_DATUM       1
+#define RAWNODE_CLASS_XATTR_REF         2
+
 #define INOCACHE_HASHSIZE 128
 
+#define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
+
 /*
   Larger representation of a raw node, kept in-core only when the
   struct inode for this particular ino is instantiated.
@@ -192,6 +255,7 @@ struct jffs2_eraseblock
         uint32_t wasted_size;
         uint32_t free_size;     /* Note that sector_size - free_size
                                    is the address of the first free space */
+        uint32_t allocated_refs;
         struct jffs2_raw_node_ref *first_node;
         struct jffs2_raw_node_ref *last_node;
 
@@ -203,57 +267,7 @@ static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
         return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
 }
 
-/* Calculate totlen from surrounding nodes or eraseblock */
-static inline uint32_t __ref_totlen(struct jffs2_sb_info *c,
-                                    struct jffs2_eraseblock *jeb,
-                                    struct jffs2_raw_node_ref *ref)
-{
-        uint32_t ref_end;
-
-        if (ref->next_phys)
-                ref_end = ref_offset(ref->next_phys);
-        else {
-                if (!jeb)
-                        jeb = &c->blocks[ref->flash_offset / c->sector_size];
-
-                /* Last node in block. Use free_space */
-                BUG_ON(ref != jeb->last_node);
-                ref_end = jeb->offset + c->sector_size - jeb->free_size;
-        }
-        return ref_end - ref_offset(ref);
-}
-
-static inline uint32_t ref_totlen(struct jffs2_sb_info *c,
-                                  struct jffs2_eraseblock *jeb,
-                                  struct jffs2_raw_node_ref *ref)
-{
-        uint32_t ret;
-
-#if CONFIG_JFFS2_FS_DEBUG > 0
-        if (jeb && jeb != &c->blocks[ref->flash_offset / c->sector_size]) {
-                printk(KERN_CRIT "ref_totlen called with wrong block -- at 0x%08x instead of 0x%08x; ref 0x%08x\n",
-                       jeb->offset, c->blocks[ref->flash_offset / c->sector_size].offset, ref_offset(ref));
-                BUG();
-        }
-#endif
-
-#if 1
-        ret = ref->__totlen;
-#else
-        /* This doesn't actually work yet */
-        ret = __ref_totlen(c, jeb, ref);
-        if (ret != ref->__totlen) {
-                printk(KERN_CRIT "Totlen for ref at %p (0x%08x-0x%08x) miscalculated as 0x%x instead of %x\n",
-                       ref, ref_offset(ref), ref_offset(ref)+ref->__totlen,
-                       ret, ref->__totlen);
-                if (!jeb)
-                        jeb = &c->blocks[ref->flash_offset / c->sector_size];
-                jffs2_dbg_dump_node_refs_nolock(c, jeb);
-                BUG();
-        }
-#endif
-        return ret;
-}
+#define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
 
 #define ALLOC_NORMAL    0       /* Normal allocation */
 #define ALLOC_DELETION  1       /* Deletion node. Best to allow it */
@@ -268,13 +282,15 @@ static inline uint32_t ref_totlen(struct jffs2_sb_info *c,
 
 #define PAD(x) (((x)+3)&~3)
 
-static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
+static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
 {
-        while(raw->next_in_ino) {
-                raw = raw->next_in_ino;
+        if (old_valid_dev(rdev)) {
+                jdev->old = cpu_to_je16(old_encode_dev(rdev));
+                return sizeof(jdev->old);
+        } else {
+                jdev->new = cpu_to_je32(new_encode_dev(rdev));
+                return sizeof(jdev->new);
         }
-
-        return ((struct jffs2_inode_cache *)raw);
 }
 
 static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
@@ -299,7 +315,6 @@ static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
         return rb_entry(node, struct jffs2_node_frag, rb);
 }
 
-#define rb_parent(rb) ((rb)->rb_parent)
 #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
 #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
 #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)
@@ -324,28 +339,44 @@ void jffs2_obsolete_node_frag(struct jffs2_sb_info *c, struct jffs2_node_frag *t
 int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
 void jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
 int jffs2_add_older_frag_to_fragtree(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_tmp_dnode_info *tn);
+struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
+                                               struct jffs2_eraseblock *jeb,
+                                               uint32_t ofs, uint32_t len,
+                                               struct jffs2_inode_cache *ic);
+extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
+                                   struct jffs2_eraseblock *jeb,
+                                   struct jffs2_raw_node_ref *ref);
 
 /* nodemgmt.c */
 int jffs2_thread_should_wake(struct jffs2_sb_info *c);
-int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs,
+int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
                         uint32_t *len, int prio, uint32_t sumsize);
-int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs,
+int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
                         uint32_t *len, uint32_t sumsize);
-int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new);
+struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c, 
+                                                       uint32_t ofs, uint32_t len,
+                                                       struct jffs2_inode_cache *ic);
 void jffs2_complete_reservation(struct jffs2_sb_info *c);
 void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
 
 /* write.c */
 int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri);
 
-struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const unsigned char *data, uint32_t datalen, uint32_t flash_ofs, int alloc_mode);
-struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_dirent *rd, const unsigned char *name, uint32_t namelen, uint32_t flash_ofs, int alloc_mode);
+struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
+                                           struct jffs2_raw_inode *ri, const unsigned char *data,
+                                           uint32_t datalen, int alloc_mode);
+struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
+                                             struct jffs2_raw_dirent *rd, const unsigned char *name,
+                                             uint32_t namelen, int alloc_mode);
 int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                             struct jffs2_raw_inode *ri, unsigned char *buf,
                             uint32_t offset, uint32_t writelen, uint32_t *retlen);
-int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const char *name, int namelen);
-int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
-int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, uint8_t type, const char *name, int namelen, uint32_t time);
+int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f,
+                    struct jffs2_raw_inode *ri, const char *name, int namelen);
+int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name,
+                    int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
+int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino,
+                   uint8_t type, const char *name, int namelen, uint32_t time);
 
 
 /* readinode.c */
@@ -368,12 +399,19 @@ struct jffs2_raw_inode *jffs2_alloc_raw_inode(void);
 void jffs2_free_raw_inode(struct jffs2_raw_inode *);
 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void);
 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *);
-struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void);
-void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *);
+int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
+                                 struct jffs2_eraseblock *jeb, int nr);
+void jffs2_free_refblock(struct jffs2_raw_node_ref *);
 struct jffs2_node_frag *jffs2_alloc_node_frag(void);
 void jffs2_free_node_frag(struct jffs2_node_frag *);
 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
 void jffs2_free_inode_cache(struct jffs2_inode_cache *);
+#ifdef CONFIG_JFFS2_FS_XATTR
+struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
+void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
+struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
+void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
+#endif
 
 /* gc.c */
 int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
@@ -393,12 +431,14 @@ int jffs2_fill_scan_buf(struct jffs2_sb_info *c, void *buf,
                                 uint32_t ofs, uint32_t len);
 struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
 int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
+int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
 
 /* build.c */
 int jffs2_do_mount_fs(struct jffs2_sb_info *c);
 
 /* erase.c */
 void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
+void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 
 #ifdef CONFIG_JFFS2_FS_WRITEBUFFER
 /* wbuf.c */