1b3b94faaSDavid Teigland /* 2b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 33a8a9a10SSteven Whitehouse * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4b3b94faaSDavid Teigland * 5b3b94faaSDavid Teigland * This copyrighted material is made available to anyone wishing to use, 6b3b94faaSDavid Teigland * modify, copy, or redistribute it subject to the terms and conditions 7e9fc2aa0SSteven Whitehouse * of the GNU General Public License version 2. 8b3b94faaSDavid Teigland */ 9b3b94faaSDavid Teigland 10b3b94faaSDavid Teigland #include <linux/sched.h> 11b3b94faaSDavid Teigland #include <linux/slab.h> 12b3b94faaSDavid Teigland #include <linux/spinlock.h> 13b3b94faaSDavid Teigland #include <linux/completion.h> 14b3b94faaSDavid Teigland #include <linux/buffer_head.h> 155c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 16d0dc80dbSSteven Whitehouse #include <linux/kallsyms.h> 177d308590SFabio Massimo Di Nitto #include <linux/lm_interface.h> 18b3b94faaSDavid Teigland 19b3b94faaSDavid Teigland #include "gfs2.h" 205c676f6dSSteven Whitehouse #include "incore.h" 21b3b94faaSDavid Teigland #include "glock.h" 22b3b94faaSDavid Teigland #include "log.h" 23b3b94faaSDavid Teigland #include "lops.h" 24b3b94faaSDavid Teigland #include "meta_io.h" 25b3b94faaSDavid Teigland #include "trans.h" 265c676f6dSSteven Whitehouse #include "util.h" 27b3b94faaSDavid Teigland 28d0dc80dbSSteven Whitehouse int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks, 29d0dc80dbSSteven Whitehouse unsigned int revokes) 30b3b94faaSDavid Teigland { 31b3b94faaSDavid Teigland struct gfs2_trans *tr; 32b3b94faaSDavid Teigland int error; 33b3b94faaSDavid Teigland 34d0dc80dbSSteven Whitehouse BUG_ON(current->journal_info); 35d0dc80dbSSteven Whitehouse BUG_ON(blocks == 0 && revokes == 0); 36b3b94faaSDavid Teigland 37f55ab26aSSteven Whitehouse tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); 38b3b94faaSDavid Teigland if (!tr) 39b3b94faaSDavid Teigland return -ENOMEM; 40b3b94faaSDavid Teigland 41d0dc80dbSSteven Whitehouse tr->tr_ip = (unsigned long)__builtin_return_address(0); 42b3b94faaSDavid Teigland tr->tr_blocks = blocks; 43b3b94faaSDavid Teigland tr->tr_revokes = revokes; 44b3b94faaSDavid Teigland tr->tr_reserved = 1; 45b3b94faaSDavid Teigland if (blocks) 46f4154ea0SSteven Whitehouse tr->tr_reserved += 6 + blocks; 47b3b94faaSDavid Teigland if (revokes) 48b3b94faaSDavid Teigland tr->tr_reserved += gfs2_struct2blk(sdp, revokes, 49cd915493SSteven Whitehouse sizeof(u64)); 50b3b94faaSDavid Teigland INIT_LIST_HEAD(&tr->tr_list_buf); 51b3b94faaSDavid Teigland 52579b78a4SSteven Whitehouse gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh); 53b3b94faaSDavid Teigland 54e317ffcbSSteven Whitehouse error = gfs2_glock_nq(&tr->tr_t_gh); 55b3b94faaSDavid Teigland if (error) 56e317ffcbSSteven Whitehouse goto fail_holder_uninit; 57b3b94faaSDavid Teigland 58b3b94faaSDavid Teigland if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { 59e317ffcbSSteven Whitehouse tr->tr_t_gh.gh_flags |= GL_NOCACHE; 60b3b94faaSDavid Teigland error = -EROFS; 61b3b94faaSDavid Teigland goto fail_gunlock; 62b3b94faaSDavid Teigland } 63b3b94faaSDavid Teigland 64b3b94faaSDavid Teigland error = gfs2_log_reserve(sdp, tr->tr_reserved); 65b3b94faaSDavid Teigland if (error) 66b3b94faaSDavid Teigland goto fail_gunlock; 67b3b94faaSDavid Teigland 685c676f6dSSteven Whitehouse current->journal_info = tr; 69b3b94faaSDavid Teigland 70b3b94faaSDavid Teigland return 0; 71b3b94faaSDavid Teigland 72b3b94faaSDavid Teigland fail_gunlock: 73e317ffcbSSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 74b3b94faaSDavid Teigland 75e317ffcbSSteven Whitehouse fail_holder_uninit: 76e317ffcbSSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 77b3b94faaSDavid Teigland kfree(tr); 78b3b94faaSDavid Teigland 79b3b94faaSDavid Teigland return error; 80b3b94faaSDavid Teigland } 81b3b94faaSDavid Teigland 82b3b94faaSDavid Teigland void gfs2_trans_end(struct gfs2_sbd *sdp) 83b3b94faaSDavid Teigland { 84f4154ea0SSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 85b3b94faaSDavid Teigland 86f4154ea0SSteven Whitehouse BUG_ON(!tr); 875c676f6dSSteven Whitehouse current->journal_info = NULL; 88b3b94faaSDavid Teigland 89b3b94faaSDavid Teigland if (!tr->tr_touched) { 90b3b94faaSDavid Teigland gfs2_log_release(sdp, tr->tr_reserved); 91b4dc7291SSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 92b4dc7291SSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 93e317ffcbSSteven Whitehouse kfree(tr); 94b3b94faaSDavid Teigland return; 95b3b94faaSDavid Teigland } 96b3b94faaSDavid Teigland 97d0dc80dbSSteven Whitehouse if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) { 98d0dc80dbSSteven Whitehouse fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ", 99d0dc80dbSSteven Whitehouse tr->tr_num_buf, tr->tr_blocks); 100d0dc80dbSSteven Whitehouse print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); 101d0dc80dbSSteven Whitehouse } 102cd45697fSSteven Whitehouse if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) { 103d0dc80dbSSteven Whitehouse fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ", 104d0dc80dbSSteven Whitehouse tr->tr_num_revoke, tr->tr_revokes); 105d0dc80dbSSteven Whitehouse print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); 106cd45697fSSteven Whitehouse } 107b3b94faaSDavid Teigland 108b3b94faaSDavid Teigland gfs2_log_commit(sdp, tr); 109b4dc7291SSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 110b4dc7291SSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 111b4dc7291SSteven Whitehouse kfree(tr); 112b3b94faaSDavid Teigland 113b3b94faaSDavid Teigland if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) 114b09e593dSSteven Whitehouse gfs2_log_flush(sdp, NULL); 115b3b94faaSDavid Teigland } 116b3b94faaSDavid Teigland 117b3b94faaSDavid Teigland void gfs2_trans_add_gl(struct gfs2_glock *gl) 118b3b94faaSDavid Teigland { 119b3b94faaSDavid Teigland lops_add(gl->gl_sbd, &gl->gl_le); 120b3b94faaSDavid Teigland } 121b3b94faaSDavid Teigland 122b3b94faaSDavid Teigland /** 123b3b94faaSDavid Teigland * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction 124b3b94faaSDavid Teigland * @gl: the glock the buffer belongs to 125b3b94faaSDavid Teigland * @bh: The buffer to add 126d4e9c4c3SSteven Whitehouse * @meta: True in the case of adding metadata 127b3b94faaSDavid Teigland * 128b3b94faaSDavid Teigland */ 129b3b94faaSDavid Teigland 130d4e9c4c3SSteven Whitehouse void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) 131b3b94faaSDavid Teigland { 132b3b94faaSDavid Teigland struct gfs2_sbd *sdp = gl->gl_sbd; 133b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 134b3b94faaSDavid Teigland 1355c676f6dSSteven Whitehouse bd = bh->b_private; 136b3b94faaSDavid Teigland if (bd) 137b3b94faaSDavid Teigland gfs2_assert(sdp, bd->bd_gl == gl); 138b3b94faaSDavid Teigland else { 139586dfdaaSSteven Whitehouse gfs2_attach_bufdata(gl, bh, meta); 1405c676f6dSSteven Whitehouse bd = bh->b_private; 141b3b94faaSDavid Teigland } 142b3b94faaSDavid Teigland lops_add(sdp, &bd->bd_le); 143b3b94faaSDavid Teigland } 144b3b94faaSDavid Teigland 145*1ad38c43SSteven Whitehouse void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) 146b3b94faaSDavid Teigland { 147*1ad38c43SSteven Whitehouse BUG_ON(!list_empty(&bd->bd_le.le_list)); 148*1ad38c43SSteven Whitehouse BUG_ON(!list_empty(&bd->bd_ail_st_list)); 149*1ad38c43SSteven Whitehouse BUG_ON(!list_empty(&bd->bd_ail_gl_list)); 15082e86087SSteven Whitehouse lops_init_le(&bd->bd_le, &gfs2_revoke_lops); 15182e86087SSteven Whitehouse lops_add(sdp, &bd->bd_le); 152b3b94faaSDavid Teigland } 153b3b94faaSDavid Teigland 154cd915493SSteven Whitehouse void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno) 155b3b94faaSDavid Teigland { 15682e86087SSteven Whitehouse struct gfs2_bufdata *bd; 157b3b94faaSDavid Teigland int found = 0; 158b3b94faaSDavid Teigland 159b3b94faaSDavid Teigland gfs2_log_lock(sdp); 160b3b94faaSDavid Teigland 16182e86087SSteven Whitehouse list_for_each_entry(bd, &sdp->sd_log_le_revoke, bd_le.le_list) { 16282e86087SSteven Whitehouse if (bd->bd_blkno == blkno) { 163*1ad38c43SSteven Whitehouse list_del_init(&bd->bd_le.le_list); 164b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); 165b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 166b3b94faaSDavid Teigland found = 1; 167b3b94faaSDavid Teigland break; 168b3b94faaSDavid Teigland } 169b3b94faaSDavid Teigland } 170b3b94faaSDavid Teigland 171b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 172b3b94faaSDavid Teigland 173b3b94faaSDavid Teigland if (found) { 1745c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 1750820ab51SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 1765c676f6dSSteven Whitehouse tr->tr_num_revoke_rm++; 177b3b94faaSDavid Teigland } 178b3b94faaSDavid Teigland } 179b3b94faaSDavid Teigland 180b3b94faaSDavid Teigland void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) 181b3b94faaSDavid Teigland { 182b3b94faaSDavid Teigland lops_add(rgd->rd_sbd, &rgd->rd_le); 183b3b94faaSDavid Teigland } 184b3b94faaSDavid Teigland 185