diff options
| -rw-r--r-- | fs/gfs2/lops.c | 175 |
1 files changed, 59 insertions, 116 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 872d3e6..7882671 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -372,7 +372,8 @@ void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) gfs2_log_write(sdp, page, sb->s_blocksize, 0); } -static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) +static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type, + u32 ld_length, u32 ld_data1) { void *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); struct gfs2_log_descriptor *ld = page_address(page); @@ -381,8 +382,8 @@ static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); ld->ld_type = cpu_to_be32(ld_type); - ld->ld_length = 0; - ld->ld_data1 = 0; + ld->ld_length = cpu_to_be32(ld_length); + ld->ld_data1 = cpu_to_be32(ld_data1); ld->ld_data2 = 0; return page; } @@ -418,39 +419,49 @@ out: unlock_buffer(bd->bd_bh); } -static void buf_lo_before_commit(struct gfs2_sbd *sdp) +static void gfs2_check_magic(struct buffer_head *bh) +{ + void *kaddr; + __be32 *ptr; + + clear_buffer_escaped(bh); + kaddr = kmap_atomic(bh->b_page); + ptr = kaddr + bh_offset(bh); + if (*ptr == cpu_to_be32(GFS2_MAGIC)) + set_buffer_escaped(bh); + kunmap_atomic(kaddr); +} + +static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, + unsigned int total, struct list_head *blist, + bool is_databuf) { struct gfs2_log_descriptor *ld; struct gfs2_bufdata *bd1 = NULL, *bd2; struct page *page; - unsigned int total; - unsigned int limit; unsigned int num; unsigned n; __be64 *ptr; - limit = buf_limit(sdp); - /* for 4k blocks, limit = 503 */ - gfs2_log_lock(sdp); - total = sdp->sd_log_num_buf; - bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); + bd1 = bd2 = list_prepare_entry(bd1, blist, bd_le.le_list); while(total) { num = total; if (total > limit) num = limit; gfs2_log_unlock(sdp); - page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA); + page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA, num + 1, num); ld = page_address(page); gfs2_log_lock(sdp); ptr = (__be64 *)(ld + 1); - ld->ld_length = cpu_to_be32(num + 1); - ld->ld_data1 = cpu_to_be32(num); n = 0; - list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, - bd_le.le_list) { + list_for_each_entry_continue(bd1, blist, bd_le.le_list) { *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); + if (is_databuf) { + gfs2_check_magic(bd1->bd_bh); + *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); + } if (++n >= num) break; } @@ -460,12 +471,27 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp) gfs2_log_lock(sdp); n = 0; - list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, - bd_le.le_list) { + list_for_each_entry_continue(bd2, blist, bd_le.le_list) { get_bh(bd2->bd_bh); gfs2_log_unlock(sdp); lock_buffer(bd2->bd_bh); - gfs2_log_write_bh(sdp, bd2->bd_bh); + + if (buffer_escaped(bd2->bd_bh)) { + void *kaddr; + page = mempool_alloc(gfs2_page_pool, GFP_NOIO); + ptr = page_address(page); + kaddr = kmap_atomic(bd2->bd_bh->b_page); + memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), + bd2->bd_bh->b_size); + kunmap_atomic(kaddr); + *(__be32 *)ptr = 0; + clear_buffer_escaped(bd2->bd_bh); + unlock_buffer(bd2->bd_bh); + brelse(bd2->bd_bh); + gfs2_log_write_page(sdp, page); + } else { + gfs2_log_write_bh(sdp, bd2->bd_bh); + } gfs2_log_lock(sdp); if (++n >= num) break; @@ -477,6 +503,14 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp) gfs2_log_unlock(sdp); } +static void buf_lo_before_commit(struct gfs2_sbd *sdp) +{ + unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ + + gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf, + &sdp->sd_log_le_buf, 0); +} + static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) { struct list_head *head = &sdp->sd_log_le_buf; @@ -594,15 +628,14 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp) struct list_head *head = &sdp->sd_log_le_revoke; struct gfs2_bufdata *bd; struct page *page; + unsigned int length; if (!sdp->sd_log_num_revoke) return; - page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE); + length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); + page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); ld = page_address(page); - ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, - sizeof(u64))); - ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); offset = sizeof(struct gfs2_log_descriptor); list_for_each_entry(bd, head, bd_le.le_list) { @@ -775,66 +808,6 @@ out: unlock_buffer(bd->bd_bh); } -static void gfs2_check_magic(struct buffer_head *bh) -{ - void *kaddr; - __be32 *ptr; - - clear_buffer_escaped(bh); - kaddr = kmap_atomic(bh->b_page); - ptr = kaddr + bh_offset(bh); - if (*ptr == cpu_to_be32(GFS2_MAGIC)) - set_buffer_escaped(bh); - kunmap_atomic(kaddr); -} - -static void gfs2_write_blocks(struct gfs2_sbd *sdp, - struct gfs2_log_descriptor *ld, - struct page *page, - struct list_head *list, struct list_head *done, - unsigned int n) -{ - struct gfs2_bufdata *bd; - __be64 *ptr; - - if (!ld) - return; - - ld->ld_length = cpu_to_be32(n + 1); - ld->ld_data1 = cpu_to_be32(n); - ptr = (__force __be64 *)(ld + 1); - - gfs2_log_write_page(sdp, page); - gfs2_log_lock(sdp); - while (!list_empty(list)) { - bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list); - list_move_tail(&bd->bd_le.le_list, done); - get_bh(bd->bd_bh); - gfs2_log_unlock(sdp); - lock_buffer(bd->bd_bh); - if (buffer_escaped(bd->bd_bh)) { - void *kaddr; - page = mempool_alloc(gfs2_page_pool, GFP_NOIO); - ptr = page_address(page); - kaddr = kmap_atomic(bd->bd_bh->b_page); - memcpy(ptr, kaddr + bh_offset(bd->bd_bh), - bd->bd_bh->b_size); - kunmap_atomic(kaddr); - *(__be32 *)ptr = 0; - clear_buffer_escaped(bd->bd_bh); - unlock_buffer(bd->bd_bh); - brelse(bd->bd_bh); - gfs2_log_write_page(sdp, page); - } else { - gfs2_log_write_bh(sdp, bd->bd_bh); - } - n--; - gfs2_log_lock(sdp); - } - gfs2_log_unlock(sdp); - BUG_ON(n != 0); -} - /** * databuf_lo_before_commit - Scan the data buffers, writing as we go * @@ -842,40 +815,10 @@ static void gfs2_write_blocks(struct gfs2_sbd *sdp, static void databuf_lo_before_commit(struct gfs2_sbd *sdp) { - struct gfs2_bufdata *bd = NULL; - struct gfs2_log_descriptor *ld = NULL; - struct page *page = NULL; - unsigned int n = 0; - __be64 *ptr = NULL, *end = NULL; - LIST_HEAD(processed); - LIST_HEAD(in_progress); + unsigned int limit = buf_limit(sdp) / 2; - gfs2_log_lock(sdp); - while (!list_empty(&sdp->sd_log_le_databuf)) { - if (ptr == end) { - gfs2_log_unlock(sdp); - gfs2_write_blocks(sdp, ld, page, &in_progress, &processed, n); - n = 0; - page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA); - ld = page_address(page); - ptr = (__force __be64 *)(ld + 1); - end = (__force __be64 *)(page_address(page) + sdp->sd_vfs->s_blocksize); - end--; - gfs2_log_lock(sdp); - continue; - } - bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list); - list_move_tail(&bd->bd_le.le_list, &in_progress); - gfs2_check_magic(bd->bd_bh); - *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr); - *ptr++ = cpu_to_be64(buffer_escaped(bd->bd_bh) ? 1 : 0); - n++; - } - gfs2_log_unlock(sdp); - gfs2_write_blocks(sdp, ld, page, &in_progress, &processed, n); - gfs2_log_lock(sdp); - list_splice(&processed, &sdp->sd_log_le_databuf); - gfs2_log_unlock(sdp); + gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf, + &sdp->sd_log_le_databuf, 1); } static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, |
