X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Focfs2%2Faops.c;h=93628b02ef5d8899658834e093195e9a702a8693;hb=d7c103d0bd29c94f78155a4538faf314e49d9713;hp=f1d1c342ce010a63cabbced4eac868bc134f08f9;hpb=ae3e0218621db0590163b2d5c424ef1f340e3cc6;p=powerpc.git diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index f1d1c342ce..93628b02ef 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -200,7 +200,7 @@ static int ocfs2_readpage(struct file *file, struct page *page) mlog_entry("(0x%p, %lu)\n", file, (page ? page->index : 0)); - ret = ocfs2_meta_lock_with_page(inode, NULL, NULL, 0, page); + ret = ocfs2_meta_lock_with_page(inode, NULL, 0, page); if (ret != 0) { if (ret == AOP_TRUNCATED_PAGE) unlock = 0; @@ -305,7 +305,7 @@ static int ocfs2_prepare_write(struct file *file, struct page *page, mlog_entry("(0x%p, 0x%p, %u, %u)\n", file, page, from, to); - ret = ocfs2_meta_lock_with_page(inode, NULL, NULL, 0, page); + ret = ocfs2_meta_lock_with_page(inode, NULL, 0, page); if (ret != 0) { mlog_errno(ret); goto out; @@ -355,16 +355,16 @@ static int walk_page_buffers( handle_t *handle, return ret; } -struct ocfs2_journal_handle *ocfs2_start_walk_page_trans(struct inode *inode, +handle_t *ocfs2_start_walk_page_trans(struct inode *inode, struct page *page, unsigned from, unsigned to) { struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - struct ocfs2_journal_handle *handle = NULL; + handle_t *handle = NULL; int ret = 0; - handle = ocfs2_start_trans(osb, NULL, OCFS2_INODE_UPDATE_CREDITS); + handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); if (!handle) { ret = -ENOMEM; mlog_errno(ret); @@ -372,7 +372,7 @@ struct ocfs2_journal_handle *ocfs2_start_walk_page_trans(struct inode *inode, } if (ocfs2_should_order_data(inode)) { - ret = walk_page_buffers(handle->k_handle, + ret = walk_page_buffers(handle, page_buffers(page), from, to, NULL, ocfs2_journal_dirty_data); @@ -382,7 +382,7 @@ struct ocfs2_journal_handle *ocfs2_start_walk_page_trans(struct inode *inode, out: if (ret) { if (handle) - ocfs2_commit_trans(handle); + ocfs2_commit_trans(osb, handle); handle = ERR_PTR(ret); } return handle; @@ -391,31 +391,28 @@ out: static int ocfs2_commit_write(struct file *file, struct page *page, unsigned from, unsigned to) { - int ret, extending = 0, locklevel = 0; - loff_t new_i_size; + int ret; struct buffer_head *di_bh = NULL; struct inode *inode = page->mapping->host; - struct ocfs2_journal_handle *handle = NULL; + handle_t *handle = NULL; + struct ocfs2_dinode *di; mlog_entry("(0x%p, 0x%p, %u, %u)\n", file, page, from, to); /* NOTE: ocfs2_file_aio_write has ensured that it's safe for - * us to sample inode->i_size here without the metadata lock: + * us to continue here without rechecking the I/O against + * changed inode values. * * 1) We're currently holding the inode alloc lock, so no * nodes can change it underneath us. * * 2) We've had to take the metadata lock at least once - * already to check for extending writes, hence insuring - * that our current copy is also up to date. + * already to check for extending writes, suid removal, etc. + * The meta data update code then ensures that we don't get a + * stale inode allocation image (i_size, i_clusters, etc). */ - new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; - if (new_i_size > i_size_read(inode)) { - extending = 1; - locklevel = 1; - } - ret = ocfs2_meta_lock_with_page(inode, NULL, &di_bh, locklevel, page); + ret = ocfs2_meta_lock_with_page(inode, &di_bh, 1, page); if (ret != 0) { mlog_errno(ret); goto out; @@ -427,23 +424,20 @@ static int ocfs2_commit_write(struct file *file, struct page *page, goto out_unlock_meta; } - if (extending) { - handle = ocfs2_start_walk_page_trans(inode, page, from, to); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - handle = NULL; - goto out_unlock_data; - } + handle = ocfs2_start_walk_page_trans(inode, page, from, to); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + goto out_unlock_data; + } - /* Mark our buffer early. We'd rather catch this error up here - * as opposed to after a successful commit_write which would - * require us to set back inode->i_size. */ - ret = ocfs2_journal_access(handle, inode, di_bh, - OCFS2_JOURNAL_ACCESS_WRITE); - if (ret < 0) { - mlog_errno(ret); - goto out_commit; - } + /* Mark our buffer early. We'd rather catch this error up here + * as opposed to after a successful commit_write which would + * require us to set back inode->i_size. */ + ret = ocfs2_journal_access(handle, inode, di_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret < 0) { + mlog_errno(ret); + goto out_commit; } /* might update i_size */ @@ -453,37 +447,28 @@ static int ocfs2_commit_write(struct file *file, struct page *page, goto out_commit; } - if (extending) { - loff_t size = (u64) i_size_read(inode); - struct ocfs2_dinode *di = - (struct ocfs2_dinode *)di_bh->b_data; + di = (struct ocfs2_dinode *)di_bh->b_data; - /* ocfs2_mark_inode_dirty is too heavy to use here. */ - inode->i_blocks = ocfs2_align_bytes_to_sectors(size); - inode->i_ctime = inode->i_mtime = CURRENT_TIME; + /* ocfs2_mark_inode_dirty() is too heavy to use here. */ + inode->i_mtime = inode->i_ctime = CURRENT_TIME; + di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec); + di->i_mtime_nsec = di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); - di->i_size = cpu_to_le64(size); - di->i_ctime = di->i_mtime = - cpu_to_le64(inode->i_mtime.tv_sec); - di->i_ctime_nsec = di->i_mtime_nsec = - cpu_to_le32(inode->i_mtime.tv_nsec); + inode->i_blocks = ocfs2_align_bytes_to_sectors((u64)(i_size_read(inode))); + di->i_size = cpu_to_le64((u64)i_size_read(inode)); - ret = ocfs2_journal_dirty(handle, di_bh); - if (ret < 0) { - mlog_errno(ret); - goto out_commit; - } + ret = ocfs2_journal_dirty(handle, di_bh); + if (ret < 0) { + mlog_errno(ret); + goto out_commit; } - BUG_ON(extending && (i_size_read(inode) != new_i_size)); - out_commit: - if (handle) - ocfs2_commit_trans(handle); + ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); out_unlock_data: ocfs2_data_unlock(inode, 1); out_unlock_meta: - ocfs2_meta_unlock(inode, locklevel); + ocfs2_meta_unlock(inode, 1); out: if (di_bh) brelse(di_bh); @@ -505,7 +490,7 @@ static sector_t ocfs2_bmap(struct address_space *mapping, sector_t block) * accessed concurrently from multiple nodes. */ if (!INODE_JOURNAL(inode)) { - err = ocfs2_meta_lock(inode, NULL, NULL, 0); + err = ocfs2_meta_lock(inode, NULL, 0); if (err) { if (err != -ENOENT) mlog_errno(err); @@ -555,8 +540,7 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { int ret; - u64 vbo_max; /* file offset, max_blocks from iblock */ - u64 p_blkno; + u64 p_blkno, inode_blocks; int contig_blocks; unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits; @@ -565,12 +549,23 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock, * nicely aligned and of the right size, so there's no need * for us to check any of that. */ - vbo_max = ((u64)iblock + max_blocks) << blocksize_bits; - spin_lock(&OCFS2_I(inode)->ip_lock); - if ((iblock + max_blocks) > - ocfs2_clusters_to_blocks(inode->i_sb, - OCFS2_I(inode)->ip_clusters)) { + inode_blocks = ocfs2_clusters_to_blocks(inode->i_sb, + OCFS2_I(inode)->ip_clusters); + + /* + * For a read which begins past the end of file, we return a hole. + */ + if (!create && (iblock >= inode_blocks)) { + spin_unlock(&OCFS2_I(inode)->ip_lock); + ret = 0; + goto bail; + } + + /* + * Any write past EOF is not allowed because we'd be extending. + */ + if (create && (iblock + max_blocks) > inode_blocks) { spin_unlock(&OCFS2_I(inode)->ip_lock); ret = -EIO; goto bail; @@ -610,7 +605,7 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, ssize_t bytes, void *private) { - struct inode *inode = iocb->ki_filp->f_dentry->d_inode; + struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; /* this io's submitter should not have unlocked this before we could */ BUG_ON(!ocfs2_iocb_is_rw_locked(iocb)); @@ -626,7 +621,7 @@ static ssize_t ocfs2_direct_IO(int rw, unsigned long nr_segs) { struct file *file = iocb->ki_filp; - struct inode *inode = file->f_dentry->d_inode->i_mapping->host; + struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host; int ret; mlog_entry_void();