From 9284ad2a9016ad631460caf8fd01fc21d84f118c Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Wed, 25 Nov 2009 01:04:21 +0900 Subject: nilfs2: relocate io status variables to segment buffer This moves io status variables in nilfs_write_info struct to nilfs_segment_buffer struct. This is a preparation to hide nilfs_write_info in segment buffer code. Signed-off-by: Ryusuke Konishi --- fs/nilfs2/segbuf.c | 59 +++++++++++++++++++++++++++--------------------------- 1 file changed, 29 insertions(+), 30 deletions(-) (limited to 'fs/nilfs2/segbuf.c') diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c index c71b689bdbce..d86056ca9a27 100644 --- a/fs/nilfs2/segbuf.c +++ b/fs/nilfs2/segbuf.c @@ -63,6 +63,11 @@ struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *sb) INIT_LIST_HEAD(&segbuf->sb_list); INIT_LIST_HEAD(&segbuf->sb_segsum_buffers); INIT_LIST_HEAD(&segbuf->sb_payload_buffers); + + init_completion(&segbuf->sb_bio_event); + atomic_set(&segbuf->sb_err, 0); + segbuf->sb_nbio = 0; + return segbuf; } @@ -132,8 +137,6 @@ int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags, segbuf->sb_sum.sumbytes = sizeof(struct nilfs_segment_summary); segbuf->sb_sum.nfinfo = segbuf->sb_sum.nfileblk = 0; segbuf->sb_sum.ctime = ctime; - - segbuf->sb_io_error = 0; return 0; } @@ -247,7 +250,7 @@ void nilfs_release_buffers(struct list_head *list) static void nilfs_end_bio_write(struct bio *bio, int err) { const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); - struct nilfs_write_info *wi = bio->bi_private; + struct nilfs_segment_buffer *segbuf = bio->bi_private; if (err == -EOPNOTSUPP) { set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); @@ -256,21 +259,22 @@ static void nilfs_end_bio_write(struct bio *bio, int err) } if (!uptodate) - atomic_inc(&wi->err); + atomic_inc(&segbuf->sb_err); bio_put(bio); - complete(&wi->bio_event); + complete(&segbuf->sb_bio_event); } -static int nilfs_submit_seg_bio(struct nilfs_write_info *wi, int mode) +static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf, + struct nilfs_write_info *wi, int mode) { struct bio *bio = wi->bio; int err; - if (wi->nbio > 0 && bdi_write_congested(wi->bdi)) { - wait_for_completion(&wi->bio_event); - wi->nbio--; - if (unlikely(atomic_read(&wi->err))) { + if (segbuf->sb_nbio > 0 && bdi_write_congested(wi->bdi)) { + wait_for_completion(&segbuf->sb_bio_event); + segbuf->sb_nbio--; + if (unlikely(atomic_read(&segbuf->sb_err))) { bio_put(bio); err = -EIO; goto failed; @@ -278,7 +282,7 @@ static int nilfs_submit_seg_bio(struct nilfs_write_info *wi, int mode) } bio->bi_end_io = nilfs_end_bio_write; - bio->bi_private = wi; + bio->bi_private = segbuf; bio_get(bio); submit_bio(mode, bio); if (bio_flagged(bio, BIO_EOPNOTSUPP)) { @@ -286,7 +290,7 @@ static int nilfs_submit_seg_bio(struct nilfs_write_info *wi, int mode) err = -EOPNOTSUPP; goto failed; } - wi->nbio++; + segbuf->sb_nbio++; bio_put(bio); wi->bio = NULL; @@ -336,15 +340,12 @@ void nilfs_segbuf_prepare_write(struct nilfs_segment_buffer *segbuf, wi->max_pages = bio_get_nr_vecs(wi->sb->s_bdev); wi->nr_vecs = min(wi->max_pages, wi->rest_blocks); wi->start = wi->end = 0; - wi->nbio = 0; wi->blocknr = segbuf->sb_pseg_start; - - atomic_set(&wi->err, 0); - init_completion(&wi->bio_event); } -static int nilfs_submit_bh(struct nilfs_write_info *wi, struct buffer_head *bh, - int mode) +static int nilfs_segbuf_submit_bh(struct nilfs_segment_buffer *segbuf, + struct nilfs_write_info *wi, + struct buffer_head *bh, int mode) { int len, err; @@ -363,7 +364,7 @@ static int nilfs_submit_bh(struct nilfs_write_info *wi, struct buffer_head *bh, return 0; } /* bio is FULL */ - err = nilfs_submit_seg_bio(wi, mode); + err = nilfs_segbuf_submit_bio(segbuf, wi, mode); /* never submit current bh */ if (likely(!err)) goto repeat; @@ -377,13 +378,13 @@ int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf, int res = 0, rw = WRITE; list_for_each_entry(bh, &segbuf->sb_segsum_buffers, b_assoc_buffers) { - res = nilfs_submit_bh(wi, bh, rw); + res = nilfs_segbuf_submit_bh(segbuf, wi, bh, rw); if (unlikely(res)) goto failed_bio; } list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { - res = nilfs_submit_bh(wi, bh, rw); + res = nilfs_segbuf_submit_bh(segbuf, wi, bh, rw); if (unlikely(res)) goto failed_bio; } @@ -394,7 +395,7 @@ int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf, * submission. */ rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG); - res = nilfs_submit_seg_bio(wi, rw); + res = nilfs_segbuf_submit_bio(segbuf, wi, rw); } failed_bio: @@ -403,29 +404,27 @@ int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf, /** * nilfs_segbuf_wait - wait for completion of requested BIOs - * @wi: nilfs_write_info + * @segbuf: segment buffer * * Return Value: On Success, 0 is returned. On Error, one of the following * negative error code is returned. * * %-EIO - I/O error */ -int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf, - struct nilfs_write_info *wi) +int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf) { int err = 0; - if (!wi->nbio) + if (!segbuf->sb_nbio) return 0; do { - wait_for_completion(&wi->bio_event); - } while (--wi->nbio > 0); + wait_for_completion(&segbuf->sb_bio_event); + } while (--segbuf->sb_nbio > 0); - if (unlikely(atomic_read(&wi->err) > 0)) { + if (unlikely(atomic_read(&segbuf->sb_err) > 0)) { printk(KERN_ERR "NILFS: IO error writing segment\n"); err = -EIO; - segbuf->sb_io_error = 1; } return err; } -- cgit v1.2.3-58-ga151