Merge remote-tracking branches 'regmap/topic/patch' and 'regmap/topic/sync' into...

[karo-tx-linux.git] / fs / logfs / readwrite.c

diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index 2ac4217b7901cb60b726986fc964f29b3e09168f..4153e65b01488b55d6a5646cee01689b26afc6a3 100644 (file)
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -244,8 +244,7 @@ static void preunlock_page(struct super_block *sb, struct page *page, int lock)
  * is waiting for s_write_mutex.  We annotate this fact by setting PG_pre_locked
  * in addition to PG_locked.
  */
-static void logfs_get_wblocks(struct super_block *sb, struct page *page,
-               int lock)
+void logfs_get_wblocks(struct super_block *sb, struct page *page, int lock)
 {
        struct logfs_super *super = logfs_super(sb);
 
@@ -260,8 +259,7 @@ static void logfs_get_wblocks(struct super_block *sb, struct page *page,
        }
 }
 
-static void logfs_put_wblocks(struct super_block *sb, struct page *page,
-               int lock)
+void logfs_put_wblocks(struct super_block *sb, struct page *page, int lock)
 {
        struct logfs_super *super = logfs_super(sb);
 
@@ -424,7 +422,7 @@ static void inode_write_block(struct logfs_block *block)
        if (inode->i_ino == LOGFS_INO_MASTER)
                logfs_write_anchor(inode->i_sb);
        else {
-               ret = __logfs_write_inode(inode, 0);
+               ret = __logfs_write_inode(inode, NULL, 0);
                /* see indirect_write_block comment */
                BUG_ON(ret);
        }
@@ -560,8 +558,13 @@ static void inode_free_block(struct super_block *sb, struct logfs_block *block)
 static void indirect_free_block(struct super_block *sb,
                struct logfs_block *block)
 {
-       ClearPagePrivate(block->page);
-       block->page->private = 0;
+       struct page *page = block->page;
+
+       if (PagePrivate(page)) {
+               ClearPagePrivate(page);
+               page_cache_release(page);
+               set_page_private(page, 0);
+       }
        __free_block(sb, block);
 }
 
@@ -650,8 +653,11 @@ static void alloc_data_block(struct inode *inode, struct page *page)
        logfs_unpack_index(page->index, &bix, &level);
        block = __alloc_block(inode->i_sb, inode->i_ino, bix, level);
        block->page = page;
+
        SetPagePrivate(page);
-       page->private = (unsigned long)block;
+       page_cache_get(page);
+       set_page_private(page, (unsigned long) block);
+
        block->ops = &indirect_block_ops;
 }
 
@@ -1570,11 +1576,15 @@ int logfs_write_buf(struct inode *inode, struct page *page, long flags)
 static int __logfs_delete(struct inode *inode, struct page *page)
 {
        long flags = WF_DELETE;
+       int err;
 
        inode->i_ctime = inode->i_mtime = CURRENT_TIME;
 
        if (page->index < I0_BLOCKS)
                return logfs_write_direct(inode, page, flags);
+       err = grow_inode(inode, page->index, 0);
+       if (err)
+               return err;
        return logfs_write_rec(inode, page, page->index, 0, flags);
 }
 
@@ -1623,7 +1633,7 @@ int logfs_rewrite_block(struct inode *inode, u64 bix, u64 ofs,
                        if (inode->i_ino == LOGFS_INO_MASTER)
                                logfs_write_anchor(inode->i_sb);
                        else {
-                               err = __logfs_write_inode(inode, flags);
+                               err = __logfs_write_inode(inode, page, flags);
                        }
                }
        }
@@ -1873,7 +1883,7 @@ int logfs_truncate(struct inode *inode, u64 target)
                logfs_get_wblocks(sb, NULL, 1);
                err = __logfs_truncate(inode, size);
                if (!err)
-                       err = __logfs_write_inode(inode, 0);
+                       err = __logfs_write_inode(inode, NULL, 0);
                logfs_put_wblocks(sb, NULL, 1);
        }
 
@@ -1901,8 +1911,11 @@ static void move_page_to_inode(struct inode *inode, struct page *page)
        li->li_block = block;
 
        block->page = NULL;
-       page->private = 0;
-       ClearPagePrivate(page);
+       if (PagePrivate(page)) {
+               ClearPagePrivate(page);
+               page_cache_release(page);
+               set_page_private(page, 0);
+       }
 }
 
 static void move_inode_to_page(struct page *page, struct inode *inode)
@@ -1918,8 +1931,12 @@ static void move_inode_to_page(struct page *page, struct inode *inode)
        BUG_ON(PagePrivate(page));
        block->ops = &indirect_block_ops;
        block->page = page;
-       page->private = (unsigned long)block;
-       SetPagePrivate(page);
+
+       if (!PagePrivate(page)) {
+               SetPagePrivate(page);
+               page_cache_get(page);
+               set_page_private(page, (unsigned long) block);
+       }
 
        block->inode = NULL;
        li->li_block = NULL;
@@ -2106,14 +2123,14 @@ void logfs_set_segment_unreserved(struct super_block *sb, u32 segno, u32 ec)
                        ec_level);
 }
 
-int __logfs_write_inode(struct inode *inode, long flags)
+int __logfs_write_inode(struct inode *inode, struct page *page, long flags)
 {
        struct super_block *sb = inode->i_sb;
        int ret;
 
-       logfs_get_wblocks(sb, NULL, flags & WF_LOCK);
+       logfs_get_wblocks(sb, page, flags & WF_LOCK);
        ret = do_write_inode(inode);
-       logfs_put_wblocks(sb, NULL, flags & WF_LOCK);
+       logfs_put_wblocks(sb, page, flags & WF_LOCK);
        return ret;
 }