diff options
Diffstat (limited to 'fs/gfs2/trans.c')
-rw-r--r-- | fs/gfs2/trans.c | 124 |
1 files changed, 112 insertions, 12 deletions
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c index 4136270..88162fa 100644 --- a/fs/gfs2/trans.c +++ b/fs/gfs2/trans.c @@ -18,6 +18,7 @@ #include "gfs2.h" #include "incore.h" #include "glock.h" +#include "inode.h" #include "log.h" #include "lops.h" #include "meta_io.h" @@ -142,44 +143,143 @@ void gfs2_trans_end(struct gfs2_sbd *sdp) sb_end_intwrite(sdp->sd_vfs); } +static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl, + struct buffer_head *bh, + const struct gfs2_log_operations *lops) +{ + struct gfs2_bufdata *bd; + + bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL); + bd->bd_bh = bh; + bd->bd_gl = gl; + bd->bd_ops = lops; + INIT_LIST_HEAD(&bd->bd_list); + bh->b_private = bd; + return bd; +} + /** - * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction - * @gl: the glock the buffer belongs to + * gfs2_trans_add_data - Add a databuf to the transaction. + * @gl: The inode glock associated with the buffer * @bh: The buffer to add - * @meta: True in the case of adding metadata * + * This is used in two distinct cases: + * i) In ordered write mode + * We put the data buffer on a list so that we can ensure that its + * synced to disk at the right time + * ii) In journaled data mode + * We need to journal the data block in the same way as metadata in + * the functions above. The difference is that here we have a tag + * which is two __be64's being the block number (as per meta data) + * and a flag which says whether the data block needs escaping or + * not. This means we need a new log entry for each 251 or so data + * blocks, which isn't an enormous overhead but twice as much as + * for normal metadata blocks. */ +void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh) +{ + struct gfs2_trans *tr = current->journal_info; + struct gfs2_sbd *sdp = gl->gl_sbd; + struct address_space *mapping = bh->b_page->mapping; + struct gfs2_inode *ip = GFS2_I(mapping->host); + struct gfs2_bufdata *bd; -void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) + if (!gfs2_is_jdata(ip)) { + gfs2_ordered_add_inode(ip); + return; + } + + lock_buffer(bh); + gfs2_log_lock(sdp); + bd = bh->b_private; + if (bd == NULL) { + gfs2_log_unlock(sdp); + unlock_buffer(bh); + if (bh->b_private == NULL) + bd = gfs2_alloc_bufdata(gl, bh, &gfs2_databuf_lops); + lock_buffer(bh); + gfs2_log_lock(sdp); + } + gfs2_assert(sdp, bd->bd_gl == gl); + tr->tr_touched = 1; + if (list_empty(&bd->bd_list)) { + set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); + set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); + gfs2_pin(sdp, bd->bd_bh); + tr->tr_num_databuf_new++; + sdp->sd_log_num_databuf++; + list_add_tail(&bd->bd_list, &sdp->sd_log_le_databuf); + } + gfs2_log_unlock(sdp); + unlock_buffer(bh); +} + +static void meta_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) { + struct gfs2_meta_header *mh; + struct gfs2_trans *tr; + + tr = current->journal_info; + tr->tr_touched = 1; + if (!list_empty(&bd->bd_list)) + return; + set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); + set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); + mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; + if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) { + printk(KERN_ERR + "Attempting to add uninitialised block to journal (inplace block=%lld)\n", + (unsigned long long)bd->bd_bh->b_blocknr); + BUG(); + } + gfs2_pin(sdp, bd->bd_bh); + mh->__pad0 = cpu_to_be64(0); + mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); + sdp->sd_log_num_buf++; + list_add(&bd->bd_list, &sdp->sd_log_le_buf); + tr->tr_num_buf_new++; +} + +void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh) +{ + struct gfs2_sbd *sdp = gl->gl_sbd; struct gfs2_bufdata *bd; lock_buffer(bh); gfs2_log_lock(sdp); bd = bh->b_private; - if (bd) - gfs2_assert(sdp, bd->bd_gl == gl); - else { + if (bd == NULL) { gfs2_log_unlock(sdp); unlock_buffer(bh); - gfs2_attach_bufdata(gl, bh, meta); - bd = bh->b_private; + lock_page(bh->b_page); + if (bh->b_private == NULL) + bd = gfs2_alloc_bufdata(gl, bh, &gfs2_buf_lops); + unlock_page(bh->b_page); lock_buffer(bh); gfs2_log_lock(sdp); } - lops_add(sdp, bd); + gfs2_assert(sdp, bd->bd_gl == gl); + meta_lo_add(sdp, bd); gfs2_log_unlock(sdp); unlock_buffer(bh); } void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) { + struct gfs2_glock *gl = bd->bd_gl; + struct gfs2_trans *tr = current->journal_info; + BUG_ON(!list_empty(&bd->bd_list)); BUG_ON(!list_empty(&bd->bd_ail_st_list)); BUG_ON(!list_empty(&bd->bd_ail_gl_list)); - lops_init_le(bd, &gfs2_revoke_lops); - lops_add(sdp, bd); + bd->bd_ops = &gfs2_revoke_lops; + tr->tr_touched = 1; + tr->tr_num_revoke++; + sdp->sd_log_num_revoke++; + atomic_inc(&gl->gl_revokes); + set_bit(GLF_LFLUSH, &gl->gl_flags); + list_add(&bd->bd_list, &sdp->sd_log_le_revoke); } void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len) |