1b3b94faaSDavid Teigland /* 2b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3b3b94faaSDavid Teigland * Copyright (C) 2004-2005 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 7b3b94faaSDavid Teigland * of the GNU General Public License v.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> 17b3b94faaSDavid Teigland #include <asm/semaphore.h> 18b3b94faaSDavid Teigland 19b3b94faaSDavid Teigland #include "gfs2.h" 205c676f6dSSteven Whitehouse #include "lm_interface.h" 215c676f6dSSteven Whitehouse #include "incore.h" 22b3b94faaSDavid Teigland #include "glock.h" 23b3b94faaSDavid Teigland #include "log.h" 24b3b94faaSDavid Teigland #include "lops.h" 25b3b94faaSDavid Teigland #include "meta_io.h" 26b3b94faaSDavid Teigland #include "trans.h" 275c676f6dSSteven Whitehouse #include "util.h" 28b3b94faaSDavid Teigland 29d0dc80dbSSteven Whitehouse int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks, 30d0dc80dbSSteven Whitehouse unsigned int revokes) 31b3b94faaSDavid Teigland { 32b3b94faaSDavid Teigland struct gfs2_trans *tr; 33b3b94faaSDavid Teigland int error; 34b3b94faaSDavid Teigland 35d0dc80dbSSteven Whitehouse BUG_ON(current->journal_info); 36d0dc80dbSSteven Whitehouse BUG_ON(blocks == 0 && revokes == 0); 37b3b94faaSDavid Teigland 38f55ab26aSSteven Whitehouse tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); 39b3b94faaSDavid Teigland if (!tr) 40b3b94faaSDavid Teigland return -ENOMEM; 41b3b94faaSDavid Teigland 42d0dc80dbSSteven Whitehouse tr->tr_ip = (unsigned long)__builtin_return_address(0); 43b3b94faaSDavid Teigland tr->tr_blocks = blocks; 44b3b94faaSDavid Teigland tr->tr_revokes = revokes; 45b3b94faaSDavid Teigland tr->tr_reserved = 1; 46b3b94faaSDavid Teigland if (blocks) 47b3b94faaSDavid Teigland tr->tr_reserved += 1 + blocks; 48b3b94faaSDavid Teigland if (revokes) 49b3b94faaSDavid Teigland tr->tr_reserved += gfs2_struct2blk(sdp, revokes, 50b3b94faaSDavid Teigland sizeof(uint64_t)); 51b3b94faaSDavid Teigland INIT_LIST_HEAD(&tr->tr_list_buf); 52b3b94faaSDavid Teigland 53e317ffcbSSteven Whitehouse gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 54e317ffcbSSteven Whitehouse GL_NEVER_RECURSE, &tr->tr_t_gh); 55b3b94faaSDavid Teigland 56e317ffcbSSteven Whitehouse error = gfs2_glock_nq(&tr->tr_t_gh); 57b3b94faaSDavid Teigland if (error) 58e317ffcbSSteven Whitehouse goto fail_holder_uninit; 59b3b94faaSDavid Teigland 60b3b94faaSDavid Teigland if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { 61e317ffcbSSteven Whitehouse tr->tr_t_gh.gh_flags |= GL_NOCACHE; 62b3b94faaSDavid Teigland error = -EROFS; 63b3b94faaSDavid Teigland goto fail_gunlock; 64b3b94faaSDavid Teigland } 65b3b94faaSDavid Teigland 66b3b94faaSDavid Teigland error = gfs2_log_reserve(sdp, tr->tr_reserved); 67b3b94faaSDavid Teigland if (error) 68b3b94faaSDavid Teigland goto fail_gunlock; 69b3b94faaSDavid Teigland 705c676f6dSSteven Whitehouse current->journal_info = tr; 71b3b94faaSDavid Teigland 72b3b94faaSDavid Teigland return 0; 73b3b94faaSDavid Teigland 74b3b94faaSDavid Teigland fail_gunlock: 75e317ffcbSSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 76b3b94faaSDavid Teigland 77e317ffcbSSteven Whitehouse fail_holder_uninit: 78e317ffcbSSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 79b3b94faaSDavid Teigland kfree(tr); 80b3b94faaSDavid Teigland 81b3b94faaSDavid Teigland return error; 82b3b94faaSDavid Teigland } 83b3b94faaSDavid Teigland 84b3b94faaSDavid Teigland void gfs2_trans_end(struct gfs2_sbd *sdp) 85b3b94faaSDavid Teigland { 86b3b94faaSDavid Teigland struct gfs2_trans *tr; 87b3b94faaSDavid Teigland 885c676f6dSSteven Whitehouse tr = current->journal_info; 895c676f6dSSteven Whitehouse current->journal_info = NULL; 90b3b94faaSDavid Teigland 91b3b94faaSDavid Teigland if (gfs2_assert_warn(sdp, tr)) 92b3b94faaSDavid Teigland return; 93b3b94faaSDavid Teigland 94b3b94faaSDavid Teigland if (!tr->tr_touched) { 95b3b94faaSDavid Teigland gfs2_log_release(sdp, tr->tr_reserved); 96b3b94faaSDavid Teigland 97b4dc7291SSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 98b4dc7291SSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 99b3b94faaSDavid Teigland 100e317ffcbSSteven Whitehouse kfree(tr); 101b3b94faaSDavid Teigland return; 102b3b94faaSDavid Teigland } 103b3b94faaSDavid Teigland 104d0dc80dbSSteven Whitehouse if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) { 105d0dc80dbSSteven Whitehouse fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ", 106d0dc80dbSSteven Whitehouse tr->tr_num_buf, tr->tr_blocks); 107d0dc80dbSSteven Whitehouse print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); 108d0dc80dbSSteven Whitehouse } 109cd45697fSSteven Whitehouse if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) { 110d0dc80dbSSteven Whitehouse fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ", 111d0dc80dbSSteven Whitehouse tr->tr_num_revoke, tr->tr_revokes); 112d0dc80dbSSteven Whitehouse print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); 113cd45697fSSteven Whitehouse } 114b3b94faaSDavid Teigland 115b3b94faaSDavid Teigland gfs2_log_commit(sdp, tr); 116b3b94faaSDavid Teigland 117b4dc7291SSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 118b4dc7291SSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 119b4dc7291SSteven Whitehouse 120b4dc7291SSteven Whitehouse kfree(tr); 121b3b94faaSDavid Teigland 122b3b94faaSDavid Teigland if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) 123b3b94faaSDavid Teigland gfs2_log_flush(sdp); 124b3b94faaSDavid Teigland } 125b3b94faaSDavid Teigland 126b3b94faaSDavid Teigland void gfs2_trans_add_gl(struct gfs2_glock *gl) 127b3b94faaSDavid Teigland { 128b3b94faaSDavid Teigland lops_add(gl->gl_sbd, &gl->gl_le); 129b3b94faaSDavid Teigland } 130b3b94faaSDavid Teigland 131b3b94faaSDavid Teigland /** 132b3b94faaSDavid Teigland * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction 133b3b94faaSDavid Teigland * @gl: the glock the buffer belongs to 134b3b94faaSDavid Teigland * @bh: The buffer to add 135d4e9c4c3SSteven Whitehouse * @meta: True in the case of adding metadata 136b3b94faaSDavid Teigland * 137b3b94faaSDavid Teigland */ 138b3b94faaSDavid Teigland 139d4e9c4c3SSteven Whitehouse void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) 140b3b94faaSDavid Teigland { 141b3b94faaSDavid Teigland struct gfs2_sbd *sdp = gl->gl_sbd; 142b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 143b3b94faaSDavid Teigland 1445c676f6dSSteven Whitehouse bd = bh->b_private; 145b3b94faaSDavid Teigland if (bd) 146b3b94faaSDavid Teigland gfs2_assert(sdp, bd->bd_gl == gl); 147b3b94faaSDavid Teigland else { 148586dfdaaSSteven Whitehouse gfs2_attach_bufdata(gl, bh, meta); 1495c676f6dSSteven Whitehouse bd = bh->b_private; 150b3b94faaSDavid Teigland } 151b3b94faaSDavid Teigland lops_add(sdp, &bd->bd_le); 152b3b94faaSDavid Teigland } 153b3b94faaSDavid Teigland 154b3b94faaSDavid Teigland void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno) 155b3b94faaSDavid Teigland { 156b3b94faaSDavid Teigland struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke), 15718ec7d5cSSteven Whitehouse GFP_NOFS | __GFP_NOFAIL); 158b3b94faaSDavid Teigland lops_init_le(&rv->rv_le, &gfs2_revoke_lops); 159b3b94faaSDavid Teigland rv->rv_blkno = blkno; 160b3b94faaSDavid Teigland lops_add(sdp, &rv->rv_le); 161b3b94faaSDavid Teigland } 162b3b94faaSDavid Teigland 163b3b94faaSDavid Teigland void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno) 164b3b94faaSDavid Teigland { 165b3b94faaSDavid Teigland struct gfs2_revoke *rv; 166b3b94faaSDavid Teigland int found = 0; 167b3b94faaSDavid Teigland 168b3b94faaSDavid Teigland gfs2_log_lock(sdp); 169b3b94faaSDavid Teigland 170b3b94faaSDavid Teigland list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) { 171b3b94faaSDavid Teigland if (rv->rv_blkno == blkno) { 172b3b94faaSDavid Teigland list_del(&rv->rv_le.le_list); 173b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); 174b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 175b3b94faaSDavid Teigland found = 1; 176b3b94faaSDavid Teigland break; 177b3b94faaSDavid Teigland } 178b3b94faaSDavid Teigland } 179b3b94faaSDavid Teigland 180b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 181b3b94faaSDavid Teigland 182b3b94faaSDavid Teigland if (found) { 1835c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 184b3b94faaSDavid Teigland kfree(rv); 1855c676f6dSSteven Whitehouse tr->tr_num_revoke_rm++; 186b3b94faaSDavid Teigland } 187b3b94faaSDavid Teigland } 188b3b94faaSDavid Teigland 189b3b94faaSDavid Teigland void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) 190b3b94faaSDavid Teigland { 191b3b94faaSDavid Teigland lops_add(rgd->rd_sbd, &rgd->rd_le); 192b3b94faaSDavid Teigland } 193b3b94faaSDavid Teigland 194