diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nilfs2/file.c | 27 | ||||
| -rw-r--r-- | fs/nilfs2/inode.c | 16 | ||||
| -rw-r--r-- | fs/nilfs2/segment.c | 120 | ||||
| -rw-r--r-- | fs/nilfs2/segment.h | 11 |
4 files changed, 93 insertions, 81 deletions
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 8031086db8d..cd38124372f 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -44,35 +44,14 @@ int nilfs_sync_file(struct file *file, struct dentry *dentry, int datasync) return 0; if (datasync) - err = nilfs_construct_dsync_segment(inode->i_sb, inode); + err = nilfs_construct_dsync_segment(inode->i_sb, inode, 0, + LLONG_MAX); else err = nilfs_construct_segment(inode->i_sb); return err; } -static ssize_t -nilfs_file_aio_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_dentry->d_inode; - ssize_t ret; - - ret = generic_file_aio_write(iocb, iov, nr_segs, pos); - if (ret <= 0) - return ret; - - if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) { - int err; - - err = nilfs_construct_dsync_segment(inode->i_sb, inode); - if (unlikely(err)) - return err; - } - return ret; -} - static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { struct page *page = vmf->page; @@ -160,7 +139,7 @@ struct file_operations nilfs_file_operations = { .read = do_sync_read, .write = do_sync_write, .aio_read = generic_file_aio_read, - .aio_write = nilfs_file_aio_write, + .aio_write = generic_file_aio_write, .ioctl = nilfs_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = nilfs_compat_ioctl, diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index b4697d9d7e5..289d1798dec 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -24,6 +24,7 @@ #include <linux/buffer_head.h> #include <linux/mpage.h> #include <linux/writeback.h> +#include <linux/uio.h> #include "nilfs.h" #include "segment.h" #include "page.h" @@ -145,8 +146,14 @@ static int nilfs_readpages(struct file *file, struct address_space *mapping, static int nilfs_writepages(struct address_space *mapping, struct writeback_control *wbc) { - /* This empty method is required not to call generic_writepages() */ - return 0; + struct inode *inode = mapping->host; + int err = 0; + + if (wbc->sync_mode == WB_SYNC_ALL) + err = nilfs_construct_dsync_segment(inode->i_sb, inode, + wbc->range_start, + wbc->range_end); + return err; } static int nilfs_writepage(struct page *page, struct writeback_control *wbc) @@ -225,11 +232,6 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, struct file *file = iocb->ki_filp; struct inode *inode = file->f_mapping->host; ssize_t size; - int err; - - err = nilfs_construct_dsync_segment(inode->i_sb, inode); - if (unlikely(err)) - return err; if (rw == WRITE) return 0; diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 2c4c088059f..ad65a737aff 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -654,29 +654,41 @@ struct nilfs_sc_operations nilfs_sc_dsync_ops = { .write_node_binfo = NULL, }; -static int nilfs_lookup_dirty_data_buffers(struct inode *inode, - struct list_head *listp, - struct nilfs_sc_info *sci) +static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, + struct list_head *listp, + size_t nlimit, + loff_t start, loff_t end) { - struct nilfs_segment_buffer *segbuf = sci->sc_curseg; struct address_space *mapping = inode->i_mapping; struct pagevec pvec; - unsigned i, ndirties = 0, nlimit; - pgoff_t index = 0; - int err = 0; + pgoff_t index = 0, last = ULONG_MAX; + size_t ndirties = 0; + int i; - nlimit = sci->sc_segbuf_nblocks - - (sci->sc_nblk_this_inc + segbuf->sb_sum.nblocks); + if (unlikely(start != 0 || end != LLONG_MAX)) { + /* + * A valid range is given for sync-ing data pages. The + * range is rounded to per-page; extra dirty buffers + * may be included if blocksize < pagesize. + */ + index = start >> PAGE_SHIFT; + last = end >> PAGE_SHIFT; + } pagevec_init(&pvec, 0); repeat: - if (!pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, - PAGEVEC_SIZE)) - return 0; + if (unlikely(index > last) || + !pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, + min_t(pgoff_t, last - index, + PAGEVEC_SIZE - 1) + 1)) + return ndirties; for (i = 0; i < pagevec_count(&pvec); i++) { struct buffer_head *bh, *head; struct page *page = pvec.pages[i]; + if (unlikely(page->index > last)) + break; + if (mapping->host) { lock_page(page); if (!page_has_buffers(page)) @@ -687,24 +699,21 @@ static int nilfs_lookup_dirty_data_buffers(struct inode *inode, bh = head = page_buffers(page); do { - if (buffer_dirty(bh)) { - if (ndirties > nlimit) { - err = -E2BIG; - break; - } - get_bh(bh); - list_add_tail(&bh->b_assoc_buffers, listp); - ndirties++; + if (!buffer_dirty(bh)) + continue; + get_bh(bh); + list_add_tail(&bh->b_assoc_buffers, listp); + ndirties++; + if (unlikely(ndirties >= nlimit)) { + pagevec_release(&pvec); + cond_resched(); + return ndirties; } - bh = bh->b_this_page; - } while (bh != head); + } while (bh = bh->b_this_page, bh != head); } pagevec_release(&pvec); cond_resched(); - - if (!err) - goto repeat; - return err; + goto repeat; } static void nilfs_lookup_dirty_node_buffers(struct inode *inode, @@ -1058,23 +1067,31 @@ static int nilfs_segctor_apply_buffers(struct nilfs_sc_info *sci, return err; } +static size_t nilfs_segctor_buffer_rest(struct nilfs_sc_info *sci) +{ + /* Remaining number of blocks within segment buffer */ + return sci->sc_segbuf_nblocks - + (sci->sc_nblk_this_inc + sci->sc_curseg->sb_sum.nblocks); +} + static int nilfs_segctor_scan_file(struct nilfs_sc_info *sci, struct inode *inode, struct nilfs_sc_operations *sc_ops) { LIST_HEAD(data_buffers); LIST_HEAD(node_buffers); - int err, err2; + int err; if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { - err = nilfs_lookup_dirty_data_buffers(inode, &data_buffers, - sci); - if (err) { - err2 = nilfs_segctor_apply_buffers( + size_t n, rest = nilfs_segctor_buffer_rest(sci); + + n = nilfs_lookup_dirty_data_buffers( + inode, &data_buffers, rest + 1, 0, LLONG_MAX); + if (n > rest) { + err = nilfs_segctor_apply_buffers( sci, inode, &data_buffers, - err == -E2BIG ? sc_ops->collect_data : NULL); - if (err == -E2BIG) - err = err2; + sc_ops->collect_data); + BUG_ON(!err); /* always receive -E2BIG or true error */ goto break_or_fail; } } @@ -1114,16 +1131,20 @@ static int nilfs_segctor_scan_file_dsync(struct nilfs_sc_info *sci, struct inode *inode) { LIST_HEAD(data_buffers); - int err, err2; + size_t n, rest = nilfs_segctor_buffer_rest(sci); + int err; - err = nilfs_lookup_dirty_data_buffers(inode, &data_buffers, sci); - err2 = nilfs_segctor_apply_buffers(sci, inode, &data_buffers, - (!err || err == -E2BIG) ? - nilfs_collect_file_data : NULL); - if (err == -E2BIG) - err = err2; - if (!err) + n = nilfs_lookup_dirty_data_buffers(inode, &data_buffers, rest + 1, + sci->sc_dsync_start, + sci->sc_dsync_end); + + err = nilfs_segctor_apply_buffers(sci, inode, &data_buffers, + nilfs_collect_file_data); + if (!err) { nilfs_segctor_end_finfo(sci, inode); + BUG_ON(n > rest); + /* always receive -E2BIG or true error if n > rest */ + } return err; } @@ -1276,14 +1297,13 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode) case NILFS_ST_DSYNC: dsync_mode: sci->sc_curseg->sb_sum.flags |= NILFS_SS_SYNDT; - ii = sci->sc_stage.dirty_file_ptr; + ii = sci->sc_dsync_inode; if (!test_bit(NILFS_I_BUSY, &ii->i_state)) break; err = nilfs_segctor_scan_file_dsync(sci, &ii->vfs_inode); if (unlikely(err)) break; - sci->sc_stage.dirty_file_ptr = NULL; sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; sci->sc_stage.scnt = NILFS_ST_DONE; return 0; @@ -2624,7 +2644,9 @@ int nilfs_construct_segment(struct super_block *sb) /** * nilfs_construct_dsync_segment - construct a data-only logical segment * @sb: super block - * @inode: the inode whose data blocks should be written out + * @inode: inode whose data blocks should be written out + * @start: start byte offset + * @end: end byte offset (inclusive) * * Return Value: On success, 0 is retured. On errors, one of the following * negative error code is returned. @@ -2639,8 +2661,8 @@ int nilfs_construct_segment(struct super_block *sb) * * %-ENOMEM - Insufficient memory available. */ -int nilfs_construct_dsync_segment(struct super_block *sb, - struct inode *inode) +int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode, + loff_t start, loff_t end) { struct nilfs_sb_info *sbi = NILFS_SB(sb); struct nilfs_sc_info *sci = NILFS_SC(sbi); @@ -2671,7 +2693,9 @@ int nilfs_construct_dsync_segment(struct super_block *sb, return 0; } spin_unlock(&sbi->s_inode_lock); - sci->sc_stage.dirty_file_ptr = ii; + sci->sc_dsync_inode = ii; + sci->sc_dsync_start = start; + sci->sc_dsync_end = end; err = nilfs_segctor_do_construct(sci, SC_LSEG_DSYNC); diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h index 615654b8c32..2dd39da9f38 100644 --- a/fs/nilfs2/segment.h +++ b/fs/nilfs2/segment.h @@ -93,6 +93,9 @@ struct nilfs_segsum_pointer { * @sc_active_segments: List of active segments that were already written out * @sc_cleaning_segments: List of segments to be freed through construction * @sc_copied_buffers: List of copied buffers (buffer heads) to freeze data + * @sc_dsync_inode: inode whose data pages are written for a sync operation + * @sc_dsync_start: start byte offset of data pages + * @sc_dsync_end: end byte offset of data pages (inclusive) * @sc_segbufs: List of segment buffers * @sc_segbuf_nblocks: Number of available blocks in segment buffers. * @sc_curseg: Current segment buffer @@ -134,6 +137,10 @@ struct nilfs_sc_info { struct list_head sc_cleaning_segments; struct list_head sc_copied_buffers; + struct nilfs_inode_info *sc_dsync_inode; + loff_t sc_dsync_start; + loff_t sc_dsync_end; + /* Segment buffers */ struct list_head sc_segbufs; unsigned long sc_segbuf_nblocks; @@ -221,8 +228,8 @@ extern void nilfs_destroy_transaction_cache(void); extern void nilfs_relax_pressure_in_lock(struct super_block *); extern int nilfs_construct_segment(struct super_block *); -extern int nilfs_construct_dsync_segment(struct super_block *, - struct inode *); +extern int nilfs_construct_dsync_segment(struct super_block *, struct inode *, + loff_t, loff_t); extern void nilfs_flush_segment(struct super_block *, ino_t); extern int nilfs_clean_segments(struct super_block *, void __user *); |