diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/block_dev.c | 29 | ||||
| -rw-r--r-- | fs/ext2/inode.c | 2 | ||||
| -rw-r--r-- | fs/ext3/file.c | 61 | ||||
| -rw-r--r-- | fs/ext4/file.c | 53 | ||||
| -rw-r--r-- | fs/fat/file.c | 22 | ||||
| -rw-r--r-- | fs/fat/misc.c | 4 | ||||
| -rw-r--r-- | fs/fs-writeback.c | 54 | ||||
| -rw-r--r-- | fs/ntfs/file.c | 16 | ||||
| -rw-r--r-- | fs/ntfs/mft.c | 13 | ||||
| -rw-r--r-- | fs/ocfs2/file.c | 49 | ||||
| -rw-r--r-- | fs/splice.c | 22 | ||||
| -rw-r--r-- | fs/sync.c | 56 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_lrw.c | 3 |
13 files changed, 137 insertions, 247 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 94dfda24c06..3581a4e5394 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1405,6 +1405,33 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg) } /* + * Write data to the block device. Only intended for the block device itself + * and the raw driver which basically is a fake block device. + * + * Does not take i_mutex for the write and thus is not for general purpose + * use. + */ +ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) +{ + struct file *file = iocb->ki_filp; + ssize_t ret; + + BUG_ON(iocb->ki_pos != pos); + + ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos); + if (ret > 0 || ret == -EIOCBQUEUED) { + ssize_t err; + + err = generic_write_sync(file, pos, ret); + if (err < 0 && ret > 0) + ret = err; + } + return ret; +} +EXPORT_SYMBOL_GPL(blkdev_aio_write); + +/* * Try to release a page associated with block device when the system * is under memory pressure. */ @@ -1436,7 +1463,7 @@ const struct file_operations def_blk_fops = { .read = do_sync_read, .write = do_sync_write, .aio_read = generic_file_aio_read, - .aio_write = generic_file_aio_write_nolock, + .aio_write = blkdev_aio_write, .mmap = generic_file_mmap, .fsync = block_fsync, .unlocked_ioctl = block_ioctl, diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index e27130341d4..1c1638f873a 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -482,7 +482,7 @@ static int ext2_alloc_branch(struct inode *inode, unlock_buffer(bh); mark_buffer_dirty_inode(bh, inode); /* We used to sync bh here if IS_SYNC(inode). - * But we now rely upon generic_osync_inode() + * But we now rely upon generic_write_sync() * and b_inode_buffers. But not for directories. */ if (S_ISDIR(inode->i_mode) && IS_DIRSYNC(inode)) diff --git a/fs/ext3/file.c b/fs/ext3/file.c index 29925321478..388bbdfa0b4 100644 --- a/fs/ext3/file.c +++ b/fs/ext3/file.c @@ -51,71 +51,12 @@ static int ext3_release_file (struct inode * inode, struct file * filp) return 0; } -static ssize_t -ext3_file_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - struct file *file = iocb->ki_filp; - struct inode *inode = file->f_path.dentry->d_inode; - ssize_t ret; - int err; - - ret = generic_file_aio_write(iocb, iov, nr_segs, pos); - - /* - * Skip flushing if there was an error, or if nothing was written. - */ - if (ret <= 0) - return ret; - - /* - * If the inode is IS_SYNC, or is O_SYNC and we are doing data - * journalling then we need to make sure that we force the transaction - * to disk to keep all metadata uptodate synchronously. - */ - if (file->f_flags & O_SYNC) { - /* - * If we are non-data-journaled, then the dirty data has - * already been flushed to backing store by generic_osync_inode, - * and the inode has been flushed too if there have been any - * modifications other than mere timestamp updates. - * - * Open question --- do we care about flushing timestamps too - * if the inode is IS_SYNC? - */ - if (!ext3_should_journal_data(inode)) - return ret; - - goto force_commit; - } - - /* - * So we know that there has been no forced data flush. If the inode - * is marked IS_SYNC, we need to force one ourselves. - */ - if (!IS_SYNC(inode)) - return ret; - - /* - * Open question #2 --- should we force data to disk here too? If we - * don't, the only impact is that data=writeback filesystems won't - * flush data to disk automatically on IS_SYNC, only metadata (but - * historically, that is what ext2 has done.) - */ - -force_commit: - err = ext3_force_commit(inode->i_sb); - if (err) - return err; - return ret; -} - const struct file_operations ext3_file_operations = { .llseek = generic_file_llseek, .read = do_sync_read, .write = do_sync_write, .aio_read = generic_file_aio_read, - .aio_write = ext3_file_write, + .aio_write = generic_file_aio_write, .unlocked_ioctl = ext3_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = ext3_compat_ioctl, diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 27f3c5354c0..5ca3eca70a1 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -58,10 +58,7 @@ static ssize_t ext4_file_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { - struct file *file = iocb->ki_filp; - struct inode *inode = file->f_path.dentry->d_inode; - ssize_t ret; - int err; + struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; /* * If we have encountered a bitmap-format file, the size limit @@ -81,53 +78,7 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov, } } - ret = generic_file_aio_write(iocb, iov, nr_segs, pos); - /* - * Skip flushing if there was an error, or if nothing was written. - */ - if (ret <= 0) - return ret; - - /* - * If the inode is IS_SYNC, or is O_SYNC and we are doing data - * journalling then we need to make sure that we force the transaction - * to disk to keep all metadata uptodate synchronously. - */ - if (file->f_flags & O_SYNC) { - /* - * If we are non-data-journaled, then the dirty data has - * already been flushed to backing store by generic_osync_inode, - * and the inode has been flushed too if there have been any - * modifications other than mere timestamp updates. - * - * Open question --- do we care about flushing timestamps too - * if the inode is IS_SYNC? - */ - if (!ext4_should_journal_data(inode)) - return ret; - - goto force_commit; - } - - /* - * So we know that there has been no forced data flush. If the inode - * is marked IS_SYNC, we need to force one ourselves. - */ - if (!IS_SYNC(inode)) - return ret; - - /* - * Open question #2 --- should we force data to disk here too? If we - * don't, the only impact is that data=writeback filesystems won't - * flush data to disk automatically on IS_SYNC, only metadata (but - * historically, that is what ext2 has done.) - */ - -force_commit: - err = ext4_force_commit(inode->i_sb); - if (err) - return err; - return ret; + return generic_file_aio_write(iocb, iov, nr_segs, pos); } static struct vm_operations_struct ext4_file_vm_ops = { diff --git a/fs/fat/file.c b/fs/fat/file.c index f042b965c95..e8c159de236 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -176,8 +176,26 @@ static int fat_cont_expand(struct inode *inode, loff_t size) inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC; mark_inode_dirty(inode); - if (IS_SYNC(inode)) - err = sync_page_range_nolock(inode, mapping, start, count); + if (IS_SYNC(inode)) { + int err2; + + /* + * Opencode syncing since we don't have a file open to use + * standard fsync path. + */ + err = filemap_fdatawrite_range(mapping, start, + start + count - 1); + err2 = sync_mapping_buffers(mapping); + if (!err) + err = err2; + err2 = write_inode_now(inode, 1); + if (!err) + err = err2; + if (!err) { + err = filemap_fdatawait_range(mapping, start, + start + count - 1); + } + } out: return err; } diff --git a/fs/fat/misc.c b/fs/fat/misc.c index a6c20473dfd..4e35be873e0 100644 --- a/fs/fat/misc.c +++ b/fs/fat/misc.c @@ -119,8 +119,8 @@ int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster) MSDOS_I(inode)->i_start = new_dclus; MSDOS_I(inode)->i_logstart = new_dclus; /* - * Since generic_osync_inode() synchronize later if - * this is not directory, we don't here. + * Since generic_write_sync() synchronizes regular files later, + * we sync here only directories. */ if (S_ISDIR(inode->i_mode) && IS_DIRSYNC(inode)) { ret = fat_sync_inode(inode); diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index da86ef58e42..628235cf44b 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -1242,57 +1242,3 @@ int sync_inode(struct inode *inode, struct writeback_control *wbc) return ret; } EXPORT_SYMBOL(sync_inode); - -/** - * generic_osync_inode - flush all dirty data for a given inode to disk - * @inode: inode to write - * @mapping: the address_space that should be flushed - * @what: what to write and wait upon - * - * This can be called by file_write functions for files which have the - * O_SYNC flag set, to flush dirty writes to disk. - * - * @what is a bitmask, specifying which part of the inode's data should be - * written and waited upon. - * - * OSYNC_DATA: i_mapping's dirty data - * OSYNC_METADATA: the buffers at i_mapping->private_list - * OSYNC_INODE: the inode itself - */ - -int generic_osync_inode(struct inode *inode, struct address_space *mapping, int what) -{ - int err = 0; - int need_write_inode_now = 0; - int err2; - - if (what & OSYNC_DATA) - err = filemap_fdatawrite(mapping); - if (what & (OSYNC_METADATA|OSYNC_DATA)) { - err2 = sync_mapping_buffers(mapping); - if (!err) - err = err2; - } - if (what & OSYNC_DATA) { - err2 = filemap_fdatawait(mapping); - if (!err) - err = err2; - } - - spin_lock(&inode_lock); - if ((inode->i_state & I_DIRTY) && - ((what & OSYNC_INODE) || (inode->i_state & I_DIRTY_DATASYNC))) - need_write_inode_now = 1; - spin_unlock(&inode_lock); - - if (need_write_inode_now) { - err2 = write_inode_now(inode, 1); - if (!err) - err = err2; - } - else - inode_sync_wait(inode); - - return err; -} -EXPORT_SYMBOL(generic_osync_inode); diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index 3140a4429af..4350d4993b1 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -2076,14 +2076,6 @@ err_out: *ppos = pos; if (cached_page) page_cache_release(cached_page); - /* For now, when the user asks for O_SYNC, we actually give O_DSYNC. */ - if (likely(!status)) { - if (unlikely((file->f_flags & O_SYNC) || IS_SYNC(vi))) { - if (!mapping->a_ops->writepage || !is_sync_kiocb(iocb)) - status = generic_osync_inode(vi, mapping, - OSYNC_METADATA|OSYNC_DATA); - } - } pagevec_lru_add_file(&lru_pvec); ntfs_debug("Done. Returning %s (written 0x%lx, status %li).", written ? "written" : "status", (unsigned long)written, @@ -2145,8 +2137,8 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, mutex_lock(&inode->i_mutex); ret = ntfs_file_aio_write_nolock(iocb, iov, nr_segs, &iocb->ki_pos); mutex_unlock(&inode->i_mutex); - if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { - int err = sync_page_range(inode, mapping, pos, ret); + if (ret > 0) { + int err = generic_write_sync(file, pos, ret); if (err < 0) ret = err; } @@ -2173,8 +2165,8 @@ static ssize_t ntfs_file_writev(struct file *file, const struct iovec *iov, if (ret == -EIOCBQUEUED) ret = wait_on_sync_kiocb(&kiocb); mutex_unlock(&inode->i_mutex); - if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { - int err = sync_page_range(inode, mapping, *ppos - ret, ret); + if (ret > 0) { + int err = generic_write_sync(file, *ppos - ret, ret); if (err < 0) ret = err; } diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c index 23bf68453d7..1caa0ef0b2b 100644 --- a/fs/ntfs/mft.c +++ b/fs/ntfs/mft.c @@ -384,13 +384,12 @@ unm_err_out: * it is dirty in the inode meta data rather than the data page cache of the * inode, and thus there are no data pages that need writing out. Therefore, a * full mark_inode_dirty() is overkill. A mark_inode_dirty_sync(), on the - * other hand, is not sufficient, because I_DIRTY_DATASYNC needs to be set to - * ensure ->write_inode is called from generic_osync_inode() and this needs to - * happen or the file data would not necessarily hit the device synchronously, - * even though the vfs inode has the O_SYNC flag set. Also, I_DIRTY_DATASYNC - * simply "feels" better than just I_DIRTY_SYNC, since the file data has not - * actually hit the block device yet, which is not what I_DIRTY_SYNC on its own - * would suggest. + * other hand, is not sufficient, because ->write_inode needs to be called even + * in case of fdatasync. This needs to happen or the file data would not + * necessarily hit the device synchronously, even though the vfs inode has the + * O_SYNC flag set. Also, I_DIRTY_DATASYNC simply "feels" better than just + * I_DIRTY_SYNC, since the file data has not actually hit the block device yet, + * which is not what I_DIRTY_SYNC on its own would suggest. */ void __mark_mft_record_dirty(ntfs_inode *ni) { diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index aa501d3f93f..221c5e98957 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1871,8 +1871,7 @@ relock: goto out_dio; } } else { - written = generic_file_aio_write_nolock(iocb, iov, nr_segs, - *ppos); + written = __generic_file_aio_write(iocb, iov, nr_segs, ppos); } out_dio: @@ -1880,18 +1879,21 @@ out_dio: BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) { - /* - * The generic write paths have handled getting data - * to disk, but since we don't make use of the dirty - * inode list, a manual journal commit is necessary - * here. - */ - if (old_size != i_size_read(inode) || - old_clusters != OCFS2_I(inode)->ip_clusters) { + ret = filemap_fdatawrite_range(file->f_mapping, pos, + pos + count - 1); + if (ret < 0) + written = ret; + + if (!ret && (old_size != i_size_read(inode) || + old_clusters != OCFS2_I(inode)->ip_clusters)) { ret = jbd2_journal_force_commit(osb->journal->j_journal); if (ret < 0) written = ret; } + + if (!ret) + ret = filemap_fdatawait_range(file->f_mapping, pos, + pos + count - 1); } /* @@ -1991,31 +1993,16 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, if (ret > 0) { unsigned long nr_pages; + int err; - *ppos += ret; nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - /* - * If file or inode is SYNC and we actually wrote some data, - * sync it. - */ - if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) { - int err; - - mutex_lock(&inode->i_mutex); - err = ocfs2_rw_lock(inode, 1); - if (err < 0) { - mlog_errno(err); - } else { - err = generic_osync_inode(inode, mapping, - OSYNC_METADATA|OSYNC_DATA); - ocfs2_rw_unlock(inode, 1); - } - mutex_unlock(&inode->i_mutex); + err = generic_write_sync(out, *ppos, ret); + if (err) + ret = err; + else + *ppos += ret; - if (err) - ret = err; - } balance_dirty_pages_ratelimited_nr(mapping, nr_pages); } diff --git a/fs/splice.c b/fs/splice.c index 73766d24f97..819023733f8 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -976,25 +976,15 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out, if (ret > 0) { unsigned long nr_pages; + int err; - *ppos += ret; nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - /* - * If file or inode is SYNC and we actually wrote some data, - * sync it. - */ - if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) { - int err; - - mutex_lock(&inode->i_mutex); - err = generic_osync_inode(inode, mapping, - OSYNC_METADATA|OSYNC_DATA); - mutex_unlock(&inode->i_mutex); - - if (err) - ret = err; - } + err = generic_write_sync(out, *ppos, ret); + if (err) + ret = err; + else + *ppos += ret; balance_dirty_pages_ratelimited_nr(mapping, nr_pages); } diff --git a/fs/sync.c b/fs/sync.c index 103cc7fdd3d..192340930bb 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -178,19 +178,23 @@ int file_fsync(struct file *filp, struct dentry *dentry, int datasync) } /** - * vfs_fsync - perform a fsync or fdatasync on a file + * vfs_fsync_range - helper to sync a range of data & metadata to disk * @file: file to sync * @dentry: dentry of @file - * @data: only perform a fdatasync operation + * @start: offset in bytes of the beginning of data range to sync + * @end: offset in bytes of the end of data range (inclusive) + * @datasync: perform only datasync * - * Write back data and metadata for @file to disk. If @datasync is - * set only metadata needed to access modified file data is written. + * Write back data in range @start..@end and metadata for @file to disk. If + * @datasync is set only metadata needed to access modified file data is + * written. * * In case this function is called from nfsd @file may be %NULL and * only @dentry is set. This can only happen when the filesystem * implements the export_operations API. */ -int vfs_fsync(struct file *file, struct dentry *dentry, int datasync) +int vfs_fsync_range(struct file *file, struct dentry *dentry, loff_t start, + loff_t end, int datasync) { const struct file_operations *fop; struct address_space *mapping; @@ -214,7 +218,7 @@ int vfs_fsync(struct file *file, struct dentry *dentry, int datasync) goto out; } - ret = filemap_fdatawrite(mapping); + ret = filemap_write_and_wait_range(mapping, start, end); /* * We need to protect against concurrent writers, which could cause @@ -225,12 +229,29 @@ int vfs_fsync(struct file *file, struct dentry *dentry, int datasync) if (!ret) ret = err; mutex_unlock(&mapping->host->i_mutex); - err = filemap_fdatawait(mapping); - if (!ret) - ret = err; + out: return ret; } +EXPORT_SYMBOL(vfs_fsync_range); + +/** + * vfs_fsync - perform a fsync or fdatasync on a file + * @file: file to sync + * @dentry: dentry of @file + * @datasync: only perform a fdatasync operation + * + * Write back data and metadata for @file to disk. If @datasync is + * set only metadata needed to access modified file data is written. + * + * In case this function is called from nfsd @file may be %NULL and + * only @dentry is set. This can only happen when the filesystem + * implements the export_operations API. + */ +int vfs_fsync(struct file *file, struct dentry *dentry, int datasync) +{ + return vfs_fsync_range(file, dentry, 0, LLONG_MAX, datasync); +} EXPORT_SYMBOL(vfs_fsync); static int do_fsync(unsigned int fd, int datasync) @@ -256,6 +277,23 @@ SYSCALL_DEFINE1(fdatasync, unsigned int, fd) return do_fsync(fd, 1); } +/** + * generic_write_sync - perform syncing after a write if file / inode is sync + * @file: file to which the write happened + * @pos: offset where the write started + * @count: length of the write + * + * This is just a simple wrapper about our general syncing function. + */ +int generic_write_sync(struct file *file, loff_t pos, loff_t count) +{ + if (!(file->f_flags & O_SYNC) && !IS_SYNC(file->f_mapping->host)) + return 0; + return vfs_fsync_range(file, file->f_path.dentry, pos, + pos + count - 1, 1); +} +EXPORT_SYMBOL(generic_write_sync); + /* * sys_sync_file_range() permits finely controlled syncing over a segment of * a file in the range offset .. (offset+nbytes-1) inclusive. If nbytes is diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index 7078974a6ee..fde63a3c4ec 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -817,7 +817,8 @@ write_retry: xfs_iunlock(xip, iolock); if (need_i_mutex) mutex_unlock(&inode->i_mutex); - error2 = sync_page_range(inode, mapping, pos, ret); + error2 = filemap_write_and_wait_range(mapping, pos, + pos + ret - 1); if (!error) error = error2; if (need_i_mutex) |