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) 47f4154ea0SSteven Whitehouse tr->tr_reserved += 6 + 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 53579b78a4SSteven Whitehouse gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh); 54b3b94faaSDavid Teigland 55e317ffcbSSteven Whitehouse error = gfs2_glock_nq(&tr->tr_t_gh); 56b3b94faaSDavid Teigland if (error) 57e317ffcbSSteven Whitehouse goto fail_holder_uninit; 58b3b94faaSDavid Teigland 59b3b94faaSDavid Teigland if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { 60e317ffcbSSteven Whitehouse tr->tr_t_gh.gh_flags |= GL_NOCACHE; 61b3b94faaSDavid Teigland error = -EROFS; 62b3b94faaSDavid Teigland goto fail_gunlock; 63b3b94faaSDavid Teigland } 64b3b94faaSDavid Teigland 65b3b94faaSDavid Teigland error = gfs2_log_reserve(sdp, tr->tr_reserved); 66b3b94faaSDavid Teigland if (error) 67b3b94faaSDavid Teigland goto fail_gunlock; 68b3b94faaSDavid Teigland 695c676f6dSSteven Whitehouse current->journal_info = tr; 70b3b94faaSDavid Teigland 71b3b94faaSDavid Teigland return 0; 72b3b94faaSDavid Teigland 73b3b94faaSDavid Teigland fail_gunlock: 74e317ffcbSSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 75b3b94faaSDavid Teigland 76e317ffcbSSteven Whitehouse fail_holder_uninit: 77e317ffcbSSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 78b3b94faaSDavid Teigland kfree(tr); 79b3b94faaSDavid Teigland 80b3b94faaSDavid Teigland return error; 81b3b94faaSDavid Teigland } 82b3b94faaSDavid Teigland 83b3b94faaSDavid Teigland void gfs2_trans_end(struct gfs2_sbd *sdp) 84b3b94faaSDavid Teigland { 85f4154ea0SSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 86b3b94faaSDavid Teigland 87f4154ea0SSteven Whitehouse BUG_ON(!tr); 885c676f6dSSteven Whitehouse current->journal_info = NULL; 89b3b94faaSDavid Teigland 90b3b94faaSDavid Teigland if (!tr->tr_touched) { 91b3b94faaSDavid Teigland gfs2_log_release(sdp, tr->tr_reserved); 92b4dc7291SSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 93b4dc7291SSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 94e317ffcbSSteven Whitehouse kfree(tr); 95b3b94faaSDavid Teigland return; 96b3b94faaSDavid Teigland } 97b3b94faaSDavid Teigland 98d0dc80dbSSteven Whitehouse if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) { 99d0dc80dbSSteven Whitehouse fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ", 100d0dc80dbSSteven Whitehouse tr->tr_num_buf, tr->tr_blocks); 101d0dc80dbSSteven Whitehouse print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); 102d0dc80dbSSteven Whitehouse } 103cd45697fSSteven Whitehouse if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) { 104d0dc80dbSSteven Whitehouse fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ", 105d0dc80dbSSteven Whitehouse tr->tr_num_revoke, tr->tr_revokes); 106d0dc80dbSSteven Whitehouse print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); 107cd45697fSSteven Whitehouse } 108b3b94faaSDavid Teigland 109b3b94faaSDavid Teigland gfs2_log_commit(sdp, tr); 110b4dc7291SSteven Whitehouse gfs2_glock_dq(&tr->tr_t_gh); 111b4dc7291SSteven Whitehouse gfs2_holder_uninit(&tr->tr_t_gh); 112b4dc7291SSteven Whitehouse kfree(tr); 113b3b94faaSDavid Teigland 114b3b94faaSDavid Teigland if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) 115b09e593dSSteven Whitehouse gfs2_log_flush(sdp, NULL); 116b3b94faaSDavid Teigland } 117b3b94faaSDavid Teigland 118b3b94faaSDavid Teigland void gfs2_trans_add_gl(struct gfs2_glock *gl) 119b3b94faaSDavid Teigland { 120b3b94faaSDavid Teigland lops_add(gl->gl_sbd, &gl->gl_le); 121b3b94faaSDavid Teigland } 122b3b94faaSDavid Teigland 123b3b94faaSDavid Teigland /** 124b3b94faaSDavid Teigland * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction 125b3b94faaSDavid Teigland * @gl: the glock the buffer belongs to 126b3b94faaSDavid Teigland * @bh: The buffer to add 127d4e9c4c3SSteven Whitehouse * @meta: True in the case of adding metadata 128b3b94faaSDavid Teigland * 129b3b94faaSDavid Teigland */ 130b3b94faaSDavid Teigland 131d4e9c4c3SSteven Whitehouse void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) 132b3b94faaSDavid Teigland { 133b3b94faaSDavid Teigland struct gfs2_sbd *sdp = gl->gl_sbd; 134b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 135b3b94faaSDavid Teigland 1365c676f6dSSteven Whitehouse bd = bh->b_private; 137b3b94faaSDavid Teigland if (bd) 138b3b94faaSDavid Teigland gfs2_assert(sdp, bd->bd_gl == gl); 139b3b94faaSDavid Teigland else { 140586dfdaaSSteven Whitehouse gfs2_attach_bufdata(gl, bh, meta); 1415c676f6dSSteven Whitehouse bd = bh->b_private; 142b3b94faaSDavid Teigland } 143b3b94faaSDavid Teigland lops_add(sdp, &bd->bd_le); 144b3b94faaSDavid Teigland } 145b3b94faaSDavid Teigland 146b3b94faaSDavid Teigland void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno) 147b3b94faaSDavid Teigland { 148b3b94faaSDavid Teigland struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke), 14918ec7d5cSSteven Whitehouse GFP_NOFS | __GFP_NOFAIL); 150b3b94faaSDavid Teigland lops_init_le(&rv->rv_le, &gfs2_revoke_lops); 151b3b94faaSDavid Teigland rv->rv_blkno = blkno; 152b3b94faaSDavid Teigland lops_add(sdp, &rv->rv_le); 153b3b94faaSDavid Teigland } 154b3b94faaSDavid Teigland 155b3b94faaSDavid Teigland void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno) 156b3b94faaSDavid Teigland { 157b3b94faaSDavid Teigland struct gfs2_revoke *rv; 158b3b94faaSDavid Teigland int found = 0; 159b3b94faaSDavid Teigland 160b3b94faaSDavid Teigland gfs2_log_lock(sdp); 161b3b94faaSDavid Teigland 162b3b94faaSDavid Teigland list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) { 163b3b94faaSDavid Teigland if (rv->rv_blkno == blkno) { 164b3b94faaSDavid Teigland list_del(&rv->rv_le.le_list); 165b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); 166b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 167b3b94faaSDavid Teigland found = 1; 168b3b94faaSDavid Teigland break; 169b3b94faaSDavid Teigland } 170b3b94faaSDavid Teigland } 171b3b94faaSDavid Teigland 172b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 173b3b94faaSDavid Teigland 174b3b94faaSDavid Teigland if (found) { 1755c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 176b3b94faaSDavid Teigland kfree(rv); 1775c676f6dSSteven Whitehouse tr->tr_num_revoke_rm++; 178b3b94faaSDavid Teigland } 179b3b94faaSDavid Teigland } 180b3b94faaSDavid Teigland 181b3b94faaSDavid Teigland void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) 182b3b94faaSDavid Teigland { 183b3b94faaSDavid Teigland lops_add(rgd->rd_sbd, &rgd->rd_le); 184b3b94faaSDavid Teigland } 185b3b94faaSDavid Teigland 186