David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| 3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. |
| 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
| 7 | * of the GNU General Public License v.2. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/spinlock.h> |
| 13 | #include <linux/completion.h> |
| 14 | #include <linux/buffer_head.h> |
| 15 | #include <asm/semaphore.h> |
| 16 | |
| 17 | #include "gfs2.h" |
| 18 | #include "glock.h" |
| 19 | #include "log.h" |
| 20 | #include "lops.h" |
| 21 | #include "meta_io.h" |
| 22 | #include "trans.h" |
| 23 | |
| 24 | int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks, |
| 25 | unsigned int revokes, char *file, unsigned int line) |
| 26 | { |
| 27 | struct gfs2_trans *tr; |
| 28 | int error; |
| 29 | |
| 30 | if (gfs2_assert_warn(sdp, !get_transaction) || |
| 31 | gfs2_assert_warn(sdp, blocks || revokes)) { |
| 32 | fs_warn(sdp, "(%s, %u)\n", file, line); |
| 33 | return -EINVAL; |
| 34 | } |
| 35 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame^] | 36 | tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 37 | if (!tr) |
| 38 | return -ENOMEM; |
| 39 | |
| 40 | tr->tr_file = file; |
| 41 | tr->tr_line = line; |
| 42 | tr->tr_blocks = blocks; |
| 43 | tr->tr_revokes = revokes; |
| 44 | tr->tr_reserved = 1; |
| 45 | if (blocks) |
| 46 | tr->tr_reserved += 1 + blocks; |
| 47 | if (revokes) |
| 48 | tr->tr_reserved += gfs2_struct2blk(sdp, revokes, |
| 49 | sizeof(uint64_t)); |
| 50 | INIT_LIST_HEAD(&tr->tr_list_buf); |
| 51 | |
| 52 | error = -ENOMEM; |
| 53 | tr->tr_t_gh = gfs2_holder_get(sdp->sd_trans_gl, LM_ST_SHARED, |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame^] | 54 | GL_NEVER_RECURSE, GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 55 | if (!tr->tr_t_gh) |
| 56 | goto fail; |
| 57 | |
| 58 | error = gfs2_glock_nq(tr->tr_t_gh); |
| 59 | if (error) |
| 60 | goto fail_holder_put; |
| 61 | |
| 62 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { |
| 63 | tr->tr_t_gh->gh_flags |= GL_NOCACHE; |
| 64 | error = -EROFS; |
| 65 | goto fail_gunlock; |
| 66 | } |
| 67 | |
| 68 | error = gfs2_log_reserve(sdp, tr->tr_reserved); |
| 69 | if (error) |
| 70 | goto fail_gunlock; |
| 71 | |
| 72 | set_transaction(tr); |
| 73 | |
| 74 | return 0; |
| 75 | |
| 76 | fail_gunlock: |
| 77 | gfs2_glock_dq(tr->tr_t_gh); |
| 78 | |
| 79 | fail_holder_put: |
| 80 | gfs2_holder_put(tr->tr_t_gh); |
| 81 | |
| 82 | fail: |
| 83 | kfree(tr); |
| 84 | |
| 85 | return error; |
| 86 | } |
| 87 | |
| 88 | void gfs2_trans_end(struct gfs2_sbd *sdp) |
| 89 | { |
| 90 | struct gfs2_trans *tr; |
| 91 | struct gfs2_holder *t_gh; |
| 92 | |
| 93 | tr = get_transaction; |
| 94 | set_transaction(NULL); |
| 95 | |
| 96 | if (gfs2_assert_warn(sdp, tr)) |
| 97 | return; |
| 98 | |
| 99 | t_gh = tr->tr_t_gh; |
| 100 | tr->tr_t_gh = NULL; |
| 101 | |
| 102 | if (!tr->tr_touched) { |
| 103 | gfs2_log_release(sdp, tr->tr_reserved); |
| 104 | kfree(tr); |
| 105 | |
| 106 | gfs2_glock_dq(t_gh); |
| 107 | gfs2_holder_put(t_gh); |
| 108 | |
| 109 | return; |
| 110 | } |
| 111 | |
| 112 | if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) |
| 113 | fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u " |
| 114 | "tr_file = %s, tr_line = %u\n", |
| 115 | tr->tr_num_buf, tr->tr_blocks, |
| 116 | tr->tr_file, tr->tr_line); |
| 117 | if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) |
| 118 | fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u " |
| 119 | "tr_file = %s, tr_line = %u\n", |
| 120 | tr->tr_num_revoke, tr->tr_revokes, |
| 121 | tr->tr_file, tr->tr_line); |
| 122 | |
| 123 | gfs2_log_commit(sdp, tr); |
| 124 | |
| 125 | gfs2_glock_dq(t_gh); |
| 126 | gfs2_holder_put(t_gh); |
| 127 | |
| 128 | if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) |
| 129 | gfs2_log_flush(sdp); |
| 130 | } |
| 131 | |
| 132 | void gfs2_trans_add_gl(struct gfs2_glock *gl) |
| 133 | { |
| 134 | lops_add(gl->gl_sbd, &gl->gl_le); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction |
| 139 | * @gl: the glock the buffer belongs to |
| 140 | * @bh: The buffer to add |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 141 | * @meta: True in the case of adding metadata |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 142 | * |
| 143 | */ |
| 144 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 145 | void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 146 | { |
| 147 | struct gfs2_sbd *sdp = gl->gl_sbd; |
| 148 | struct gfs2_bufdata *bd; |
| 149 | |
| 150 | bd = get_v2bd(bh); |
| 151 | if (bd) |
| 152 | gfs2_assert(sdp, bd->bd_gl == gl); |
| 153 | else { |
Steven Whitehouse | 586dfda | 2006-01-18 11:32:00 +0000 | [diff] [blame] | 154 | gfs2_attach_bufdata(gl, bh, meta); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 155 | bd = get_v2bd(bh); |
| 156 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 157 | lops_add(sdp, &bd->bd_le); |
| 158 | } |
| 159 | |
| 160 | void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno) |
| 161 | { |
| 162 | struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke), |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 163 | GFP_NOFS | __GFP_NOFAIL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 164 | lops_init_le(&rv->rv_le, &gfs2_revoke_lops); |
| 165 | rv->rv_blkno = blkno; |
| 166 | lops_add(sdp, &rv->rv_le); |
| 167 | } |
| 168 | |
| 169 | void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno) |
| 170 | { |
| 171 | struct gfs2_revoke *rv; |
| 172 | int found = 0; |
| 173 | |
| 174 | gfs2_log_lock(sdp); |
| 175 | |
| 176 | list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) { |
| 177 | if (rv->rv_blkno == blkno) { |
| 178 | list_del(&rv->rv_le.le_list); |
| 179 | gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); |
| 180 | sdp->sd_log_num_revoke--; |
| 181 | found = 1; |
| 182 | break; |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | gfs2_log_unlock(sdp); |
| 187 | |
| 188 | if (found) { |
| 189 | kfree(rv); |
| 190 | get_transaction->tr_num_revoke_rm++; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) |
| 195 | { |
| 196 | lops_add(rgd->rd_sbd, &rgd->rd_le); |
| 197 | } |
| 198 | |