X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fntfs%2Fcompress.c;h=d1619d05eb23bce83bea2d9f005e663625fa1f2e;hb=4c5cdb1e1f2a502069f57a60b5c6b97b8106c73c;hp=25d24106f893a691cbc7cc5010cf4b181dbdfc8a;hpb=38a9a621aba953ddb8051547e98c10ec3c741312;p=linux-2.6

diff --git a/fs/ntfs/compress.c b/fs/ntfs/compress.c
index 25d24106f8..d1619d05eb 100644
--- a/fs/ntfs/compress.c
+++ b/fs/ntfs/compress.c
@@ -67,7 +67,7 @@ static DEFINE_SPINLOCK(ntfs_cb_lock);
 /**
  * allocate_compression_buffers - allocate the decompression buffers
  *
- * Caller has to hold the ntfs_lock semaphore.
+ * Caller has to hold the ntfs_lock mutex.
  *
  * Return 0 on success or -ENOMEM if the allocations failed.
  */
@@ -84,7 +84,7 @@ int allocate_compression_buffers(void)
 /**
  * free_compression_buffers - free the decompression buffers
  *
- * Caller has to hold the ntfs_lock semaphore.
+ * Caller has to hold the ntfs_lock mutex.
  */
 void free_compression_buffers(void)
 {
@@ -561,6 +561,16 @@ int ntfs_read_compressed_block(struct page *page)
 	read_unlock_irqrestore(&ni->size_lock, flags);
 	max_page = ((i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
 			offset;
+	/* Is the page fully outside i_size? (truncate in progress) */
+	if (xpage >= max_page) {
+		kfree(bhs);
+		kfree(pages);
+		zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+		ntfs_debug("Compressed read outside i_size - truncated?");
+		SetPageUptodate(page);
+		unlock_page(page);
+		return 0;
+	}
 	if (nr_pages < max_page)
 		max_page = nr_pages;
 	for (i = 0; i < max_page; i++, offset++) {
@@ -600,7 +610,7 @@ do_next_cb:
 	rl = NULL;
 	for (vcn = start_vcn, start_vcn += cb_clusters; vcn < start_vcn;
 			vcn++) {
-		BOOL is_retry = FALSE;
+		bool is_retry = false;
 
 		if (!rl) {
 lock_retry_remap:
@@ -626,7 +636,7 @@ lock_retry_remap:
 				break;
 			if (is_retry || lcn != LCN_RL_NOT_MAPPED)
 				goto rl_err;
-			is_retry = TRUE;
+			is_retry = true;
 			/*
 			 * Attempt to map runlist, dropping lock for the
 			 * duration.