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> 15b3b94faaSDavid Teigland #include <asm/semaphore.h> 16b3b94faaSDavid Teigland 17b3b94faaSDavid Teigland #include "gfs2.h" 18b3b94faaSDavid Teigland #include "glock.h" 19b3b94faaSDavid Teigland #include "log.h" 20b3b94faaSDavid Teigland #include "lops.h" 21b3b94faaSDavid Teigland #include "meta_io.h" 22b3b94faaSDavid Teigland #include "trans.h" 23b3b94faaSDavid Teigland 24b3b94faaSDavid Teigland int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks, 25b3b94faaSDavid Teigland unsigned int revokes, char *file, unsigned int line) 26b3b94faaSDavid Teigland { 27b3b94faaSDavid Teigland struct gfs2_trans *tr; 28b3b94faaSDavid Teigland int error; 29b3b94faaSDavid Teigland 30b3b94faaSDavid Teigland if (gfs2_assert_warn(sdp, !get_transaction) || 31b3b94faaSDavid Teigland gfs2_assert_warn(sdp, blocks || revokes)) { 32b3b94faaSDavid Teigland fs_warn(sdp, "(%s, %u)\n", file, line); 33b3b94faaSDavid Teigland return -EINVAL; 34b3b94faaSDavid Teigland } 35b3b94faaSDavid Teigland 36b3b94faaSDavid Teigland tr = kzalloc(sizeof(struct gfs2_trans), GFP_KERNEL); 37b3b94faaSDavid Teigland if (!tr) 38b3b94faaSDavid Teigland return -ENOMEM; 39b3b94faaSDavid Teigland 40b3b94faaSDavid Teigland tr->tr_file = file; 41b3b94faaSDavid Teigland tr->tr_line = line; 42b3b94faaSDavid Teigland tr->tr_blocks = blocks; 43b3b94faaSDavid Teigland tr->tr_revokes = revokes; 44b3b94faaSDavid Teigland tr->tr_reserved = 1; 45b3b94faaSDavid Teigland if (blocks) 46b3b94faaSDavid Teigland tr->tr_reserved += 1 + blocks; 47b3b94faaSDavid Teigland if (revokes) 48b3b94faaSDavid Teigland tr->tr_reserved += gfs2_struct2blk(sdp, revokes, 49b3b94faaSDavid Teigland sizeof(uint64_t)); 50b3b94faaSDavid Teigland INIT_LIST_HEAD(&tr->tr_list_buf); 51b3b94faaSDavid Teigland 52b3b94faaSDavid Teigland error = -ENOMEM; 53b3b94faaSDavid Teigland tr->tr_t_gh = gfs2_holder_get(sdp->sd_trans_gl, LM_ST_SHARED, 54b3b94faaSDavid Teigland GL_NEVER_RECURSE, GFP_KERNEL); 55b3b94faaSDavid Teigland if (!tr->tr_t_gh) 56b3b94faaSDavid Teigland goto fail; 57b3b94faaSDavid Teigland 58b3b94faaSDavid Teigland error = gfs2_glock_nq(tr->tr_t_gh); 59b3b94faaSDavid Teigland if (error) 60b3b94faaSDavid Teigland goto fail_holder_put; 61b3b94faaSDavid Teigland 62b3b94faaSDavid Teigland if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { 63b3b94faaSDavid Teigland tr->tr_t_gh->gh_flags |= GL_NOCACHE; 64b3b94faaSDavid Teigland error = -EROFS; 65b3b94faaSDavid Teigland goto fail_gunlock; 66b3b94faaSDavid Teigland } 67b3b94faaSDavid Teigland 68b3b94faaSDavid Teigland error = gfs2_log_reserve(sdp, tr->tr_reserved); 69b3b94faaSDavid Teigland if (error) 70b3b94faaSDavid Teigland goto fail_gunlock; 71b3b94faaSDavid Teigland 72b3b94faaSDavid Teigland set_transaction(tr); 73b3b94faaSDavid Teigland 74b3b94faaSDavid Teigland return 0; 75b3b94faaSDavid Teigland 76b3b94faaSDavid Teigland fail_gunlock: 77b3b94faaSDavid Teigland gfs2_glock_dq(tr->tr_t_gh); 78b3b94faaSDavid Teigland 79b3b94faaSDavid Teigland fail_holder_put: 80b3b94faaSDavid Teigland gfs2_holder_put(tr->tr_t_gh); 81b3b94faaSDavid Teigland 82b3b94faaSDavid Teigland fail: 83b3b94faaSDavid Teigland kfree(tr); 84b3b94faaSDavid Teigland 85b3b94faaSDavid Teigland return error; 86b3b94faaSDavid Teigland } 87b3b94faaSDavid Teigland 88b3b94faaSDavid Teigland void gfs2_trans_end(struct gfs2_sbd *sdp) 89b3b94faaSDavid Teigland { 90b3b94faaSDavid Teigland struct gfs2_trans *tr; 91b3b94faaSDavid Teigland struct gfs2_holder *t_gh; 92b3b94faaSDavid Teigland 93b3b94faaSDavid Teigland tr = get_transaction; 94b3b94faaSDavid Teigland set_transaction(NULL); 95b3b94faaSDavid Teigland 96b3b94faaSDavid Teigland if (gfs2_assert_warn(sdp, tr)) 97b3b94faaSDavid Teigland return; 98b3b94faaSDavid Teigland 99b3b94faaSDavid Teigland t_gh = tr->tr_t_gh; 100b3b94faaSDavid Teigland tr->tr_t_gh = NULL; 101b3b94faaSDavid Teigland 102b3b94faaSDavid Teigland if (!tr->tr_touched) { 103b3b94faaSDavid Teigland gfs2_log_release(sdp, tr->tr_reserved); 104b3b94faaSDavid Teigland kfree(tr); 105b3b94faaSDavid Teigland 106b3b94faaSDavid Teigland gfs2_glock_dq(t_gh); 107b3b94faaSDavid Teigland gfs2_holder_put(t_gh); 108b3b94faaSDavid Teigland 109b3b94faaSDavid Teigland return; 110b3b94faaSDavid Teigland } 111b3b94faaSDavid Teigland 112b3b94faaSDavid Teigland if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) 113b3b94faaSDavid Teigland fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u " 114b3b94faaSDavid Teigland "tr_file = %s, tr_line = %u\n", 115b3b94faaSDavid Teigland tr->tr_num_buf, tr->tr_blocks, 116b3b94faaSDavid Teigland tr->tr_file, tr->tr_line); 117b3b94faaSDavid Teigland if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) 118b3b94faaSDavid Teigland fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u " 119b3b94faaSDavid Teigland "tr_file = %s, tr_line = %u\n", 120b3b94faaSDavid Teigland tr->tr_num_revoke, tr->tr_revokes, 121b3b94faaSDavid Teigland tr->tr_file, tr->tr_line); 122b3b94faaSDavid Teigland 123b3b94faaSDavid Teigland gfs2_log_commit(sdp, tr); 124b3b94faaSDavid Teigland 125b3b94faaSDavid Teigland gfs2_glock_dq(t_gh); 126b3b94faaSDavid Teigland gfs2_holder_put(t_gh); 127b3b94faaSDavid Teigland 128b3b94faaSDavid Teigland if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) 129b3b94faaSDavid Teigland gfs2_log_flush(sdp); 130b3b94faaSDavid Teigland } 131b3b94faaSDavid Teigland 132b3b94faaSDavid Teigland void gfs2_trans_add_gl(struct gfs2_glock *gl) 133b3b94faaSDavid Teigland { 134b3b94faaSDavid Teigland lops_add(gl->gl_sbd, &gl->gl_le); 135b3b94faaSDavid Teigland } 136b3b94faaSDavid Teigland 137b3b94faaSDavid Teigland /** 138b3b94faaSDavid Teigland * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction 139b3b94faaSDavid Teigland * @gl: the glock the buffer belongs to 140b3b94faaSDavid Teigland * @bh: The buffer to add 141d4e9c4c3SSteven Whitehouse * @meta: True in the case of adding metadata 142b3b94faaSDavid Teigland * 143b3b94faaSDavid Teigland */ 144b3b94faaSDavid Teigland 145d4e9c4c3SSteven Whitehouse void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) 146b3b94faaSDavid Teigland { 147b3b94faaSDavid Teigland struct gfs2_sbd *sdp = gl->gl_sbd; 148b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 149b3b94faaSDavid Teigland 150b3b94faaSDavid Teigland bd = get_v2bd(bh); 151b3b94faaSDavid Teigland if (bd) 152b3b94faaSDavid Teigland gfs2_assert(sdp, bd->bd_gl == gl); 153b3b94faaSDavid Teigland else { 154586dfdaaSSteven Whitehouse gfs2_attach_bufdata(gl, bh, meta); 155b3b94faaSDavid Teigland bd = get_v2bd(bh); 156b3b94faaSDavid Teigland } 157b3b94faaSDavid Teigland 158b3b94faaSDavid Teigland lops_add(sdp, &bd->bd_le); 159b3b94faaSDavid Teigland } 160b3b94faaSDavid Teigland 161b3b94faaSDavid Teigland void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno) 162b3b94faaSDavid Teigland { 163b3b94faaSDavid Teigland struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke), 164b3b94faaSDavid Teigland GFP_KERNEL | __GFP_NOFAIL); 165b3b94faaSDavid Teigland lops_init_le(&rv->rv_le, &gfs2_revoke_lops); 166b3b94faaSDavid Teigland rv->rv_blkno = blkno; 167b3b94faaSDavid Teigland lops_add(sdp, &rv->rv_le); 168b3b94faaSDavid Teigland } 169b3b94faaSDavid Teigland 170b3b94faaSDavid Teigland void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno) 171b3b94faaSDavid Teigland { 172b3b94faaSDavid Teigland struct gfs2_revoke *rv; 173b3b94faaSDavid Teigland int found = 0; 174b3b94faaSDavid Teigland 175b3b94faaSDavid Teigland gfs2_log_lock(sdp); 176b3b94faaSDavid Teigland 177b3b94faaSDavid Teigland list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) { 178b3b94faaSDavid Teigland if (rv->rv_blkno == blkno) { 179b3b94faaSDavid Teigland list_del(&rv->rv_le.le_list); 180b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); 181b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 182b3b94faaSDavid Teigland found = 1; 183b3b94faaSDavid Teigland break; 184b3b94faaSDavid Teigland } 185b3b94faaSDavid Teigland } 186b3b94faaSDavid Teigland 187b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 188b3b94faaSDavid Teigland 189b3b94faaSDavid Teigland if (found) { 190b3b94faaSDavid Teigland kfree(rv); 191b3b94faaSDavid Teigland get_transaction->tr_num_revoke_rm++; 192b3b94faaSDavid Teigland } 193b3b94faaSDavid Teigland } 194b3b94faaSDavid Teigland 195b3b94faaSDavid Teigland void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) 196b3b94faaSDavid Teigland { 197b3b94faaSDavid Teigland lops_add(rgd->rd_sbd, &rgd->rd_le); 198b3b94faaSDavid Teigland } 199b3b94faaSDavid Teigland 200b3b94faaSDavid Teigland void gfs2_trans_add_databuf(struct gfs2_sbd *sdp, struct buffer_head *bh) 201b3b94faaSDavid Teigland { 202b3b94faaSDavid Teigland struct gfs2_databuf *db; 203b3b94faaSDavid Teigland 204b3b94faaSDavid Teigland db = get_v2db(bh); 205b3b94faaSDavid Teigland if (!db) { 206b3b94faaSDavid Teigland db = kmalloc(sizeof(struct gfs2_databuf), 207b3b94faaSDavid Teigland GFP_KERNEL | __GFP_NOFAIL); 208b3b94faaSDavid Teigland lops_init_le(&db->db_le, &gfs2_databuf_lops); 209b3b94faaSDavid Teigland get_bh(bh); 210b3b94faaSDavid Teigland db->db_bh = bh; 211b3b94faaSDavid Teigland set_v2db(bh, db); 212b3b94faaSDavid Teigland lops_add(sdp, &db->db_le); 213b3b94faaSDavid Teigland } 214b3b94faaSDavid Teigland } 215b3b94faaSDavid Teigland 216