diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/lops.c | 117 | ||||
| -rw-r--r-- | fs/gfs2/meta_io.c | 70 | ||||
| -rw-r--r-- | fs/gfs2/meta_io.h | 3 |
3 files changed, 89 insertions, 101 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 7ef3356..3ec5871 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -27,7 +27,71 @@ #include "trans.h" #include "util.h" -static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) +/** + * gfs2_pin - Pin a buffer in memory + * @sdp: The superblock + * @bh: The buffer to be pinned + * + * The log lock must be held when calling this function + */ +static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) +{ + struct gfs2_bufdata *bd; + + gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); + + clear_buffer_dirty(bh); + if (test_set_buffer_pinned(bh)) + gfs2_assert_withdraw(sdp, 0); + if (!buffer_uptodate(bh)) + gfs2_io_error_bh(sdp, bh); + bd = bh->b_private; + /* If this buffer is in the AIL and it has already been written + * to in-place disk block, remove it from the AIL. + */ + if (bd->bd_ail) + list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); + get_bh(bh); +} + +/** + * gfs2_unpin - Unpin a buffer + * @sdp: the filesystem the buffer belongs to + * @bh: The buffer to unpin + * @ai: + * + */ + +static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, + struct gfs2_ail *ai) +{ + struct gfs2_bufdata *bd = bh->b_private; + + gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); + + if (!buffer_pinned(bh)) + gfs2_assert_withdraw(sdp, 0); + + lock_buffer(bh); + mark_buffer_dirty(bh); + clear_buffer_pinned(bh); + + gfs2_log_lock(sdp); + if (bd->bd_ail) { + list_del(&bd->bd_ail_st_list); + brelse(bh); + } else { + struct gfs2_glock *gl = bd->bd_gl; + list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); + atomic_inc(&gl->gl_ail_count); + } + bd->bd_ail = ai; + list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); + gfs2_log_unlock(sdp); + unlock_buffer(bh); +} + +static void __glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) { struct gfs2_glock *gl; struct gfs2_trans *tr = current->journal_info; @@ -38,15 +102,19 @@ static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) return; - gfs2_log_lock(sdp); - if (!list_empty(&le->le_list)){ - gfs2_log_unlock(sdp); + if (!list_empty(&le->le_list)) return; - } + gfs2_glock_hold(gl); set_bit(GLF_DIRTY, &gl->gl_flags); sdp->sd_log_num_gl++; list_add(&le->le_list, &sdp->sd_log_le_gl); +} + +static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) +{ + gfs2_log_lock(sdp); + __glock_lo_add(sdp, le); gfs2_log_unlock(sdp); } @@ -71,30 +139,25 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); struct gfs2_trans *tr; + lock_buffer(bd->bd_bh); gfs2_log_lock(sdp); - if (!list_empty(&bd->bd_list_tr)) { - gfs2_log_unlock(sdp); - return; - } + if (!list_empty(&bd->bd_list_tr)) + goto out; tr = current->journal_info; tr->tr_touched = 1; tr->tr_num_buf++; list_add(&bd->bd_list_tr, &tr->tr_list_buf); - gfs2_log_unlock(sdp); - if (!list_empty(&le->le_list)) - return; - - gfs2_trans_add_gl(bd->bd_gl); - + goto out; + __glock_lo_add(sdp, &bd->bd_gl->gl_le); gfs2_meta_check(sdp, bd->bd_bh); gfs2_pin(sdp, bd->bd_bh); - gfs2_log_lock(sdp); sdp->sd_log_num_buf++; list_add(&le->le_list, &sdp->sd_log_le_buf); - gfs2_log_unlock(sdp); - tr->tr_num_buf_new++; +out: + gfs2_log_unlock(sdp); + unlock_buffer(bd->bd_bh); } static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) @@ -476,31 +539,29 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) struct address_space *mapping = bd->bd_bh->b_page->mapping; struct gfs2_inode *ip = GFS2_I(mapping->host); + lock_buffer(bd->bd_bh); gfs2_log_lock(sdp); - if (!list_empty(&bd->bd_list_tr)) { - gfs2_log_unlock(sdp); - return; - } + if (!list_empty(&bd->bd_list_tr)) + goto out; tr->tr_touched = 1; if (gfs2_is_jdata(ip)) { tr->tr_num_buf++; list_add(&bd->bd_list_tr, &tr->tr_list_buf); } - gfs2_log_unlock(sdp); if (!list_empty(&le->le_list)) - return; + goto out; - gfs2_trans_add_gl(bd->bd_gl); + __glock_lo_add(sdp, &bd->bd_gl->gl_le); if (gfs2_is_jdata(ip)) { gfs2_pin(sdp, bd->bd_bh); tr->tr_num_databuf_new++; - } - gfs2_log_lock(sdp); - if (gfs2_is_jdata(ip)) sdp->sd_log_num_jdata++; + } sdp->sd_log_num_databuf++; list_add(&le->le_list, &sdp->sd_log_le_databuf); +out: gfs2_log_unlock(sdp); + unlock_buffer(bd->bd_bh); } static int gfs2_check_magic(struct buffer_head *bh) diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c index 8da343b..d762e4f7 100644 --- a/fs/gfs2/meta_io.c +++ b/fs/gfs2/meta_io.c @@ -298,76 +298,6 @@ void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, } /** - * gfs2_pin - Pin a buffer in memory - * @sdp: the filesystem the buffer belongs to - * @bh: The buffer to be pinned - * - */ - -void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) -{ - struct gfs2_bufdata *bd = bh->b_private; - - gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); - - if (test_set_buffer_pinned(bh)) - gfs2_assert_withdraw(sdp, 0); - - wait_on_buffer(bh); - - /* If this buffer is in the AIL and it has already been written - to in-place disk block, remove it from the AIL. */ - - gfs2_log_lock(sdp); - if (bd->bd_ail && !buffer_in_io(bh)) - list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); - gfs2_log_unlock(sdp); - - clear_buffer_dirty(bh); - wait_on_buffer(bh); - - if (!buffer_uptodate(bh)) - gfs2_io_error_bh(sdp, bh); - - get_bh(bh); -} - -/** - * gfs2_unpin - Unpin a buffer - * @sdp: the filesystem the buffer belongs to - * @bh: The buffer to unpin - * @ai: - * - */ - -void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, - struct gfs2_ail *ai) -{ - struct gfs2_bufdata *bd = bh->b_private; - - gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); - - if (!buffer_pinned(bh)) - gfs2_assert_withdraw(sdp, 0); - - mark_buffer_dirty(bh); - clear_buffer_pinned(bh); - - gfs2_log_lock(sdp); - if (bd->bd_ail) { - list_del(&bd->bd_ail_st_list); - brelse(bh); - } else { - struct gfs2_glock *gl = bd->bd_gl; - list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); - atomic_inc(&gl->gl_ail_count); - } - bd->bd_ail = ai; - list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); - gfs2_log_unlock(sdp); -} - -/** * gfs2_meta_wipe - make inode's buffers so they aren't dirty/pinned anymore * @ip: the inode who owns the buffers * @bstart: the first buffer in the run diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h index 527bf19..fd67f07 100644 --- a/fs/gfs2/meta_io.h +++ b/fs/gfs2/meta_io.h @@ -50,9 +50,6 @@ int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh); void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, int meta); -void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); -void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, - struct gfs2_ail *ai); void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen); |
