Add large file support changes to yaffs_vfs_single.c

[yaffs2.git] / yaffs_vfs_multi.c

diff --git a/yaffs_vfs_multi.c b/yaffs_vfs_multi.c
index 70ddce9bc5f770faa0f638912352a9e29be6be28..ce41d6c81d8150a0ad59a70fec185c2645d167c7 100644 (file)
--- a/yaffs_vfs_multi.c
+++ b/yaffs_vfs_multi.c
@@ -148,6 +148,12 @@
 #define YAFFS_USE_WRITE_BEGIN_END 0
 #endif
 
+
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
+#define set_nlink(inode, count)  do { (inode)->i_nlink = (count); } while(0)
+#endif
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
 static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
 {
@@ -970,13 +976,13 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
        struct yaffs_obj *obj;
        unsigned char *pg_buf;
        int ret;
-
+       loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
        struct yaffs_dev *dev;
 
        yaffs_trace(YAFFS_TRACE_OS,
-               "yaffs_readpage_nolock at %08x, size %08x",
-               (unsigned)(pg->index << PAGE_CACHE_SHIFT),
-               (unsigned)PAGE_CACHE_SIZE);
+               "yaffs_readpage_nolock at %lld, size %08x",
+               (long long)pos,
+               (unsigned)PAGE_CACHE_SIZE);
 
        obj = yaffs_dentry_to_obj(f->f_dentry);
 
@@ -994,8 +1000,7 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 
        yaffs_gross_lock(dev);
 
-       ret = yaffs_file_rd(obj, pg_buf,
-                           pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
+       ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
 
        yaffs_gross_unlock(dev);
 
@@ -1101,7 +1106,7 @@ static int yaffs_writepage(struct page *page)
                obj->variant.file_variant.file_size, inode->i_size);
 
        n_written = yaffs_wr_file(obj, buffer,
-                                 page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
+                                 ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
 
        yaffs_touch_super(dev);
 
@@ -1325,7 +1330,7 @@ static void yaffs_fill_inode_from_obj(struct inode *inode,
                inode->i_size = yaffs_get_obj_length(obj);
                inode->i_blocks = (inode->i_size + 511) >> 9;
 
-               inode->i_nlink = yaffs_get_obj_link_count(obj);
+               set_nlink(inode, yaffs_get_obj_link_count(obj));
 
                yaffs_trace(YAFFS_TRACE_OS,
                        "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
@@ -1740,10 +1745,9 @@ static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
        ret_val = yaffs_unlinker(obj, dentry->d_name.name);
 
        if (ret_val == YAFFS_OK) {
-               dentry->d_inode->i_nlink--;
+               inode_dec_link_count(dentry->d_inode);
                dir->i_version++;
                yaffs_gross_unlock(dev);
-               mark_inode_dirty(dentry->d_inode);
                update_dir_time(dir);
                return 0;
        }
@@ -1775,7 +1779,7 @@ static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
                                   obj);
 
        if (link) {
-               old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj);
+               set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
                d_instantiate(dentry, old_dentry->d_inode);
                atomic_inc(&old_dentry->d_inode->i_count);
                yaffs_trace(YAFFS_TRACE_OS,
@@ -1805,6 +1809,14 @@ static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
 
        yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
 
+       if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
+                               YAFFS_MAX_NAME_LENGTH)
+               return -ENAMETOOLONG;
+
+       if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
+                               YAFFS_MAX_ALIAS_LENGTH)
+               return -ENAMETOOLONG;
+
        dev = yaffs_inode_to_obj(dir)->my_dev;
        yaffs_gross_lock(dev);
        obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
@@ -1893,10 +1905,8 @@ static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
        yaffs_gross_unlock(dev);
 
        if (ret_val == YAFFS_OK) {
-               if (target) {
-                       new_dentry->d_inode->i_nlink--;
-                       mark_inode_dirty(new_dentry->d_inode);
-               }
+               if (target)
+                       inode_dec_link_count(new_dentry->d_inode);
 
                update_dir_time(old_dir);
                if (old_dir != new_dir)
@@ -2815,7 +2825,6 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
        sb->u.generic_sbp = dev;
 #endif
 
-       sb->s_maxbytes = 35000000000LL;
 
        dev->driver_context = mtd;
        param->name = mtd->name;
@@ -2938,6 +2947,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
        if (!context->bg_thread)
                param->defered_dir_update = 0;
 
+       sb->s_maxbytes = yaffs_max_file_size(dev);
+
        /* Release lock before yaffs_get_inode() */
        yaffs_gross_unlock(dev);
 
@@ -3114,6 +3125,8 @@ static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
 
 static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
 {
+       buf += sprintf(buf, "max file size....... %lld\n",
+                               (long long) yaffs_max_file_size(dev));
        buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
                                dev->data_bytes_per_chunk);
        buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);