[JFFS2] Introduce jffs2_scan_dirty_space() function.

To eliminate the __totlen field from struct jffs2_raw_node_ref, we need
to allocate nodes for dirty space instead of just tweaking the accounting
data. Introduce jffs2_scan_dirty_space() in preparation for that.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index 1fc8aed..0050685 100644 (file)
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -1080,3 +1080,14 @@ void jffs2_link_node_ref(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
        ref->__totlen = len;
        ref->next_phys = NULL;
 }
+
+int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+                          uint32_t size)
+{
+       c->dirty_size += size;
+       c->free_size -= size;
+       jeb->dirty_size += size;
+       jeb->free_size -= size;
+
+       return 0;
+}

diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 194cff7..ca15b3c 100644 (file)
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -430,6 +430,7 @@ 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);

diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 192b0bd..b3fc9fd 100644 (file)
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -314,13 +314,15 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
        struct jffs2_xattr_datum *xd;
        struct jffs2_raw_node_ref *raw;
        uint32_t totlen, crc;
+       int err;
 
        crc = crc32(0, rx, sizeof(struct jffs2_raw_xattr) - 4);
        if (crc != je32_to_cpu(rx->node_crc)) {
                if (je32_to_cpu(rx->node_crc) != 0xffffffff)
                        JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
                                      ofs, je32_to_cpu(rx->node_crc), crc);
-               DIRTY_SPACE(je32_to_cpu(rx->totlen));
+               if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rx->totlen))))
+                       return err;
                return 0;
        }
 
@@ -328,7 +330,8 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
        if (totlen != je32_to_cpu(rx->totlen)) {
                JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%u\n",
                              ofs, je32_to_cpu(rx->totlen), totlen);
-               DIRTY_SPACE(je32_to_cpu(rx->totlen));
+               if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rx->totlen))))
+                       return err;
                return 0;
        }
 
@@ -340,7 +343,8 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
        if (IS_ERR(xd)) {
                jffs2_free_raw_node_ref(raw);
                if (PTR_ERR(xd) == -EEXIST) {
-                       DIRTY_SPACE(PAD(je32_to_cpu(rx->totlen)));
+                       if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rx->totlen)))))
+                               return err;
                        return 0;
                }
                return PTR_ERR(xd);
@@ -370,13 +374,15 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
        struct jffs2_xattr_ref *ref;
        struct jffs2_raw_node_ref *raw;
        uint32_t crc;
+       int err;
 
        crc = crc32(0, rr, sizeof(*rr) - 4);
        if (crc != je32_to_cpu(rr->node_crc)) {
                if (je32_to_cpu(rr->node_crc) != 0xffffffff)
                        JFFS2_WARNING("node CRC failed at %#08x, read=%#08x, calc=%#08x\n",
                                      ofs, je32_to_cpu(rr->node_crc), crc);
-               DIRTY_SPACE(PAD(je32_to_cpu(rr->totlen)));
+               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rr->totlen)))))
+                       return err;
                return 0;
        }
 
@@ -384,7 +390,8 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
                JFFS2_WARNING("node length mismatch at %#08x, read=%u, calc=%u\n",
                              ofs, je32_to_cpu(rr->totlen),
                              PAD(sizeof(struct jffs2_raw_xref)));
-               DIRTY_SPACE(je32_to_cpu(rr->totlen));
+               if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(rr->totlen))))
+                       return err;
                return 0;
        }
 
@@ -569,7 +576,8 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
        if (ofs) {
                D1(printk(KERN_DEBUG "Free space at %08x ends at %08x\n", jeb->offset,
                          jeb->offset + ofs));
-               DIRTY_SPACE(ofs);
+               if ((err = jffs2_scan_dirty_space(c, jeb, ofs)))
+                       return err;
        }
 
        /* Now ofs is a complete physical flash offset as it always was... */
@@ -593,7 +601,8 @@ scan_more:
                }
                if (ofs == prevofs) {
                        printk(KERN_WARNING "ofs 0x%08x has already been seen. Skipping\n", ofs);
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
@@ -602,7 +611,8 @@ scan_more:
                if (jeb->offset + c->sector_size < ofs + sizeof(*node)) {
                        D1(printk(KERN_DEBUG "Fewer than %zd bytes left to end of block. (%x+%x<%x+%zx) Not reading\n", sizeof(struct jffs2_unknown_node),
                                  jeb->offset, c->sector_size, ofs, sizeof(*node)));
-                       DIRTY_SPACE((jeb->offset + c->sector_size)-ofs);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, (jeb->offset + c->sector_size)-ofs)))
+                               return err;
                        break;
                }
 
@@ -632,7 +642,8 @@ scan_more:
                                if (*(uint32_t *)(&buf[inbuf_ofs]) != 0xffffffff) {
                                        printk(KERN_WARNING "Empty flash at 0x%08x ends at 0x%08x\n",
                                               empty_start, ofs);
-                                       DIRTY_SPACE(ofs-empty_start);
+                                       if ((err = jffs2_scan_dirty_space(c, jeb, ofs-empty_start)))
+                                               return err;
                                        goto scan_more;
                                }
 
@@ -669,20 +680,23 @@ scan_more:
 
                if (ofs == jeb->offset && je16_to_cpu(node->magic) == KSAMTIB_CIGAM_2SFFJ) {
                        printk(KERN_WARNING "Magic bitmask is backwards at offset 0x%08x. Wrong endian filesystem?\n", ofs);
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
                if (je16_to_cpu(node->magic) == JFFS2_DIRTY_BITMASK) {
                        D1(printk(KERN_DEBUG "Dirty bitmask at 0x%08x\n", ofs));
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
                if (je16_to_cpu(node->magic) == JFFS2_OLD_MAGIC_BITMASK) {
                        printk(KERN_WARNING "Old JFFS2 bitmask found at 0x%08x\n", ofs);
                        printk(KERN_WARNING "You cannot use older JFFS2 filesystems with newer kernels\n");
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
@@ -691,7 +705,8 @@ scan_more:
                        noisy_printk(&noise, "jffs2_scan_eraseblock(): Magic bitmask 0x%04x not found at 0x%08x: 0x%04x instead\n",
                                     JFFS2_MAGIC_BITMASK, ofs,
                                     je16_to_cpu(node->magic));
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
@@ -708,7 +723,8 @@ scan_more:
                                     je32_to_cpu(node->totlen),
                                     je32_to_cpu(node->hdr_crc),
                                     hdr_crc);
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
@@ -719,7 +735,8 @@ scan_more:
                        printk(KERN_WARNING "Node at 0x%08x with length 0x%08x would run over the end of the erase block\n",
                               ofs, je32_to_cpu(node->totlen));
                        printk(KERN_WARNING "Perhaps the file system was created with the wrong erase size?\n");
-                       DIRTY_SPACE(4);
+                       if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+                               return err;
                        ofs += 4;
                        continue;
                }
@@ -727,7 +744,8 @@ scan_more:
                if (!(je16_to_cpu(node->nodetype) & JFFS2_NODE_ACCURATE)) {
                        /* Wheee. This is an obsoleted node */
                        D2(printk(KERN_DEBUG "Node at 0x%08x is obsolete. Skipping\n", ofs));
-                       DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+                       if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+                               return err;
                        ofs += PAD(je32_to_cpu(node->totlen));
                        continue;
                }
@@ -807,11 +825,13 @@ scan_more:
                        if (je32_to_cpu(node->totlen) != c->cleanmarker_size) {
                                printk(KERN_NOTICE "CLEANMARKER node found at 0x%08x has totlen 0x%x != normal 0x%x\n",
                                       ofs, je32_to_cpu(node->totlen), c->cleanmarker_size);
-                               DIRTY_SPACE(PAD(sizeof(struct jffs2_unknown_node)));
+                               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(sizeof(struct jffs2_unknown_node)))))
+                                       return err;
                                ofs += PAD(sizeof(struct jffs2_unknown_node));
                        } else if (jeb->first_node) {
                                printk(KERN_NOTICE "CLEANMARKER node found at 0x%08x, not first node in block (0x%08x)\n", ofs, jeb->offset);
-                               DIRTY_SPACE(PAD(sizeof(struct jffs2_unknown_node)));
+                               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(sizeof(struct jffs2_unknown_node)))))
+                                       return err;
                                ofs += PAD(sizeof(struct jffs2_unknown_node));
                        } else {
                                struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
@@ -831,7 +851,8 @@ scan_more:
                case JFFS2_NODETYPE_PADDING:
                        if (jffs2_sum_active())
                                jffs2_sum_add_padding_mem(s, je32_to_cpu(node->totlen));
-                       DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+                       if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+                               return err;
                        ofs += PAD(je32_to_cpu(node->totlen));
                        break;
 
@@ -842,7 +863,8 @@ scan_more:
                                c->flags |= JFFS2_SB_FLAG_RO;
                                if (!(jffs2_is_readonly(c)))
                                        return -EROFS;
-                               DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+                               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+                                       return err;
                                ofs += PAD(je32_to_cpu(node->totlen));
                                break;
 
@@ -852,7 +874,8 @@ scan_more:
 
                        case JFFS2_FEATURE_RWCOMPAT_DELETE:
                                D1(printk(KERN_NOTICE "Unknown but compatible feature node (0x%04x) found at offset 0x%08x\n", je16_to_cpu(node->nodetype), ofs));
-                               DIRTY_SPACE(PAD(je32_to_cpu(node->totlen)));
+                               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(node->totlen)))))
+                                       return err;
                                ofs += PAD(je32_to_cpu(node->totlen));
                                break;
 
@@ -930,6 +953,7 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
        struct jffs2_raw_node_ref *raw;
        struct jffs2_inode_cache *ic;
        uint32_t ino = je32_to_cpu(ri->ino);
+       int err;
 
        D1(printk(KERN_DEBUG "jffs2_scan_inode_node(): Node at 0x%08x\n", ofs));
 
@@ -959,7 +983,8 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
                        printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
                               ofs, je32_to_cpu(ri->node_crc), crc);
                        /* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
-                       DIRTY_SPACE(PAD(je32_to_cpu(ri->totlen)));
+                       if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(ri->totlen)))))
+                               return err;
                        jffs2_free_raw_node_ref(raw);
                        return 0;
                }
@@ -1000,6 +1025,7 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
        struct jffs2_full_dirent *fd;
        struct jffs2_inode_cache *ic;
        uint32_t crc;
+       int err;
 
        D1(printk(KERN_DEBUG "jffs2_scan_dirent_node(): Node at 0x%08x\n", ofs));
 
@@ -1011,7 +1037,8 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
                printk(KERN_NOTICE "jffs2_scan_dirent_node(): Node CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
                       ofs, je32_to_cpu(rd->node_crc), crc);
                /* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
-               DIRTY_SPACE(PAD(je32_to_cpu(rd->totlen)));
+               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
+                       return err;
                return 0;
        }
 
@@ -1032,7 +1059,8 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
                jffs2_free_full_dirent(fd);
                /* FIXME: Why do we believe totlen? */
                /* We believe totlen because the CRC on the node _header_ was OK, just the name failed. */
-               DIRTY_SPACE(PAD(je32_to_cpu(rd->totlen)));
+               if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rd->totlen)))))
+                       return err;
                return 0;
        }
        raw = jffs2_alloc_raw_node_ref();

diff --git a/fs/jffs2/summary.c b/fs/jffs2/summary.c
index 9ced3aa..11ea54c 100644 (file)
--- a/fs/jffs2/summary.c
+++ b/fs/jffs2/summary.c
@@ -380,6 +380,7 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
        struct jffs2_full_dirent *fd;
        void *sp;
        int i, ino;
+       int err;
 
        sp = summary->sum;
 
@@ -494,7 +495,8 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
                                        jffs2_free_raw_node_ref(raw);
                                        if (PTR_ERR(xd) == -EEXIST) {
                                                /* a newer version of xd exists */
-                                               DIRTY_SPACE(je32_to_cpu(spx->totlen));
+                                               if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(spx->totlen))))
+                                                       return err;
                                                sp += JFFS2_SUMMARY_XATTR_SIZE;
                                                break;
                                        }
@@ -585,6 +587,7 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
        struct jffs2_raw_node_ref *cache_ref;
        int ret, ofs;
        uint32_t crc;
+       int err;
 
        ofs = jeb->offset + c->sector_size - sumsize;
 
@@ -629,11 +632,13 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
                if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
                        dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
                                je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
-                       DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
+                       if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
+                               return err;
                } else if (jeb->first_node) {
                        dbg_summary("CLEANMARKER node not first node in block "
                                        "(0x%08x)\n", jeb->offset);
-                       DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
+                       if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
+                               return err;
                } else {
                        struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
 
@@ -650,7 +655,8 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
        }
 
        if (je32_to_cpu(summary->padded)) {
-               DIRTY_SPACE(je32_to_cpu(summary->padded));
+               if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(summary->padded))))
+                       return err;
        }
 
        ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
@@ -823,7 +829,7 @@ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock
                        infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen);
 
                c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
-               DIRTY_SPACE(infosize);
+               jffs2_scan_dirty_space(c, jeb, infosize);
 
                return 1;
        }

diff --git a/fs/jffs2/summary.h b/fs/jffs2/summary.h
index ce892d5..e7eb0c5 100644 (file)
--- a/fs/jffs2/summary.h
+++ b/fs/jffs2/summary.h
@@ -18,23 +18,6 @@
 #include <linux/uio.h>
 #include <linux/jffs2.h>
 
-#define DIRTY_SPACE(x) do { typeof(x) _x = (x); \
-               c->free_size -= _x; c->dirty_size += _x; \
-               jeb->free_size -= _x ; jeb->dirty_size += _x; \
-               }while(0)
-#define USED_SPACE(x) do { typeof(x) _x = (x); \
-               c->free_size -= _x; c->used_size += _x; \
-               jeb->free_size -= _x ; jeb->used_size += _x; \
-               }while(0)
-#define WASTED_SPACE(x) do { typeof(x) _x = (x); \
-               c->free_size -= _x; c->wasted_size += _x; \
-               jeb->free_size -= _x ; jeb->wasted_size += _x; \
-               }while(0)
-#define UNCHECKED_SPACE(x) do { typeof(x) _x = (x); \
-               c->free_size -= _x; c->unchecked_size += _x; \
-               jeb->free_size -= _x ; jeb->unchecked_size += _x; \
-               }while(0)
-
 #define BLK_STATE_ALLFF                0
 #define BLK_STATE_CLEAN                1
 #define BLK_STATE_PARTDIRTY    2