Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd

[pandora-kernel.git] / fs / exofs / inode.c

diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index a755523..0c713cf 100644 (file)
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -43,6 +43,17 @@ enum { BIO_MAX_PAGES_KMALLOC =
                PAGE_SIZE / sizeof(struct page *),
 };
 
+unsigned exofs_max_io_pages(struct exofs_layout *layout,
+                           unsigned expected_pages)
+{
+       unsigned pages = min_t(unsigned, expected_pages, MAX_PAGES_KMALLOC);
+
+       /* TODO: easily support bio chaining */
+       pages =  min_t(unsigned, pages,
+                      layout->group_width * BIO_MAX_PAGES_KMALLOC);
+       return pages;
+}
+
 struct page_collect {
        struct exofs_sb_info *sbi;
        struct inode *inode;
@@ -97,8 +108,7 @@ static void _pcol_reset(struct page_collect *pcol)
 
 static int pcol_try_alloc(struct page_collect *pcol)
 {
-       unsigned pages = min_t(unsigned, pcol->expected_pages,
-                         MAX_PAGES_KMALLOC);
+       unsigned pages;
 
        if (!pcol->ios) { /* First time allocate io_state */
                int ret = exofs_get_io_state(&pcol->sbi->layout, &pcol->ios);
@@ -108,8 +118,7 @@ static int pcol_try_alloc(struct page_collect *pcol)
        }
 
        /* TODO: easily support bio chaining */
-       pages =  min_t(unsigned, pages,
-                      pcol->sbi->layout.group_width * BIO_MAX_PAGES_KMALLOC);
+       pages =  exofs_max_io_pages(&pcol->sbi->layout, pcol->expected_pages);
 
        for (; pages; pages >>= 1) {
                pcol->pages = kmalloc(pages * sizeof(struct page *),
@@ -350,8 +359,10 @@ static int readpage_strip(void *data, struct page *page)
 
                if (!pcol->read_4_write)
                        unlock_page(page);
-               EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page,"
-                            " splitting\n", inode->i_ino, page->index);
+               EXOFS_DBGMSG("readpage_strip(0x%lx) empty page len=%zx "
+                            "read_4_write=%d index=0x%lx end_index=0x%lx "
+                            "splitting\n", inode->i_ino, len,
+                            pcol->read_4_write, page->index, end_index);
 
                return read_exec(pcol);
        }
@@ -722,11 +733,28 @@ int exofs_write_begin(struct file *file, struct address_space *mapping,
 
         /* read modify write */
        if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) {
+               loff_t i_size = i_size_read(mapping->host);
+               pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
+               size_t rlen;
+
+               if (page->index < end_index)
+                       rlen = PAGE_CACHE_SIZE;
+               else if (page->index == end_index)
+                       rlen = i_size & ~PAGE_CACHE_MASK;
+               else
+                       rlen = 0;
+
+               if (!rlen) {
+                       clear_highpage(page);
+                       SetPageUptodate(page);
+                       goto out;
+               }
+
                ret = _readpage(page, true);
                if (ret) {
                        /*SetPageError was done by _readpage. Is it ok?*/
                        unlock_page(page);
-                       EXOFS_DBGMSG("__readpage_filler failed\n");
+                       EXOFS_DBGMSG("__readpage failed\n");
                }
        }
 out:
@@ -1030,6 +1058,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
                memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
        }
 
+       inode->i_mapping->backing_dev_info = sb->s_bdi;
        if (S_ISREG(inode->i_mode)) {
                inode->i_op = &exofs_file_inode_operations;
                inode->i_fop = &exofs_file_operations;
@@ -1073,6 +1102,7 @@ int __exofs_wait_obj_created(struct exofs_i_info *oi)
        }
        return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0;
 }
+
 /*
  * Callback function from exofs_new_inode().  The important thing is that we
  * set the obj_created flag so that other methods know that the object exists on
@@ -1130,7 +1160,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
 
        sbi = sb->s_fs_info;
 
-       sb->s_dirt = 1;
+       inode->i_mapping->backing_dev_info = sb->s_bdi;
        inode_init_owner(inode, dir, mode);
        inode->i_ino = sbi->s_nextid++;
        inode->i_blkbits = EXOFS_BLKSHIFT;
@@ -1141,6 +1171,8 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
        spin_unlock(&sbi->s_next_gen_lock);
        insert_inode_hash(inode);
 
+       exofs_sbi_write_stats(sbi); /* Make sure new sbi->s_nextid is on disk */
+
        mark_inode_dirty(inode);
 
        ret = exofs_get_io_state(&sbi->layout, &ios);
@@ -1271,7 +1303,8 @@ out:
 
 int exofs_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
-       return exofs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
+       /* FIXME: fix fsync and use wbc->sync_mode == WB_SYNC_ALL */
+       return exofs_update_inode(inode, 1);
 }
 
 /*