update readme

[lunaix-os.git] / lunaix-os / kernel / fs / pcache.c

diff --git a/lunaix-os/kernel/fs/pcache.c b/lunaix-os/kernel/fs/pcache.c
index 8ef8fc8aa4359a95a15d8653d0d361f6a8bc0ff3..317e491a336284268a6f827ae82d7aec1841e4ae 100644 (file)
--- a/lunaix-os/kernel/fs/pcache.c
+++ b/lunaix-os/kernel/fs/pcache.c
@@ -76,7 +76,7 @@ pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg)
     }
 }
 
     }
 }
 

-struct pcache_pg*
+int

 pcache_get_page(struct pcache* pcache,
                 uint32_t index,
                 uint32_t* offset,
 pcache_get_page(struct pcache* pcache,
                 uint32_t index,
                 uint32_t* offset,


@@ -84,9 +84,10 @@ pcache_get_page(struct pcache* pcache,
 {
     struct pcache_pg* pg = btrie_get(&pcache->tree, index);
     int is_new = 0;
 {
     struct pcache_pg* pg = btrie_get(&pcache->tree, index);
     int is_new = 0;

-    *offset = index & ((1 << pcache->tree.truncated) - 1);
+    u32_t mask = ((1 << pcache->tree.truncated) - 1);
+    *offset = index & mask;

     if (!pg && (pg = pcache_new_page(pcache, index))) {
     if (!pg && (pg = pcache_new_page(pcache, index))) {

-        pg->fpos = index - *offset;
+        pg->fpos = index & ~mask;

         pcache->n_pages++;
         is_new = 1;
     }
         pcache->n_pages++;
         is_new = 1;
     }


@@ -137,10 +138,11 @@ pcache_read(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos)
             }
 
             // Filling up the page
             }
 
             // Filling up the page

-            errno = inode->default_fops.read(inode, pg->pg, PG_SIZE, pg->fpos);
+            errno =
+              inode->default_fops->read_page(inode, pg->pg, PG_SIZE, pg->fpos);

             if (errno >= 0 && errno < PG_SIZE) {
                 // EOF
             if (errno >= 0 && errno < PG_SIZE) {
                 // EOF

-                len = buf_off + errno;
+                len = MIN(len, buf_off + errno);

             } else if (errno < 0) {
                 break;
             }
             } else if (errno < 0) {
                 break;
             }


@@ -175,7 +177,8 @@ pcache_commit(struct v_inode* inode, struct pcache_pg* page)
         return;
     }
 
         return;
     }
 

-    int errno = inode->default_fops.write(inode, page->pg, PG_SIZE, page->fpos);
+    int errno =
+      inode->default_fops->write_page(inode, page->pg, PG_SIZE, page->fpos);

 
     if (!errno) {
         page->flags &= ~PCACHE_DIRTY;
 
     if (!errno) {
         page->flags &= ~PCACHE_DIRTY;