diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/inode.c | 3 | ||||
| -rw-r--r-- | fs/jbd2/transaction.c | 24 | ||||
| -rw-r--r-- | fs/ocfs2/aops.c | 3 |
3 files changed, 21 insertions, 9 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 19d6ca27c879..694645e51fe0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3015,7 +3015,8 @@ static int __ext4_journalled_invalidatepage(struct page *page, if (offset == 0) ClearPageChecked(page); - return jbd2_journal_invalidatepage(journal, page, offset); + return jbd2_journal_invalidatepage(journal, page, offset, + PAGE_CACHE_SIZE - offset); } /* Wrapper for aops... */ diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 10f524c59ea8..5d8268ad364a 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2034,18 +2034,23 @@ zap_buffer_unlocked: * void jbd2_journal_invalidatepage() * @journal: journal to use for flush... * @page: page to flush - * @offset: length of page to invalidate. + * @offset: start of the range to invalidate + * @length: length of the range to invalidate * - * Reap page buffers containing data after offset in page. Can return -EBUSY - * if buffers are part of the committing transaction and the page is straddling - * i_size. Caller then has to wait for current commit and try again. + * Reap page buffers containing data after in the specified range in page. + * Can return -EBUSY if buffers are part of the committing transaction and + * the page is straddling i_size. Caller then has to wait for current commit + * and try again. */ int jbd2_journal_invalidatepage(journal_t *journal, struct page *page, - unsigned long offset) + unsigned int offset, + unsigned int length) { struct buffer_head *head, *bh, *next; + unsigned int stop = offset + length; unsigned int curr_off = 0; + int partial_page = (offset || length < PAGE_CACHE_SIZE); int may_free = 1; int ret = 0; @@ -2054,6 +2059,8 @@ int jbd2_journal_invalidatepage(journal_t *journal, if (!page_has_buffers(page)) return 0; + BUG_ON(stop > PAGE_CACHE_SIZE || stop < length); + /* We will potentially be playing with lists other than just the * data lists (especially for journaled data mode), so be * cautious in our locking. */ @@ -2063,10 +2070,13 @@ int jbd2_journal_invalidatepage(journal_t *journal, unsigned int next_off = curr_off + bh->b_size; next = bh->b_this_page; + if (next_off > stop) + return 0; + if (offset <= curr_off) { /* This block is wholly outside the truncation point */ lock_buffer(bh); - ret = journal_unmap_buffer(journal, bh, offset > 0); + ret = journal_unmap_buffer(journal, bh, partial_page); unlock_buffer(bh); if (ret < 0) return ret; @@ -2077,7 +2087,7 @@ int jbd2_journal_invalidatepage(journal_t *journal, } while (bh != head); - if (!offset) { + if (!partial_page) { if (may_free && try_to_free_buffers(page)) J_ASSERT(!page_has_buffers(page)); } diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index ecb86ca8b1f1..7c477559f38e 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -608,7 +608,8 @@ static void ocfs2_invalidatepage(struct page *page, unsigned int offset, { journal_t *journal = OCFS2_SB(page->mapping->host->i_sb)->journal->j_journal; - jbd2_journal_invalidatepage(journal, page, offset); + jbd2_journal_invalidatepage(journal, page, offset, + PAGE_CACHE_SIZE - offset); } static int ocfs2_releasepage(struct page *page, gfp_t wait) |