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> 1575ca61c1SSteven Whitehouse #include <linux/mempool.h> 165c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 17c969f58cSSteven Whitehouse #include <linux/bio.h> 18c969f58cSSteven Whitehouse #include <linux/fs.h> 19b3b94faaSDavid Teigland 20b3b94faaSDavid Teigland #include "gfs2.h" 215c676f6dSSteven Whitehouse #include "incore.h" 222332c443SRobert Peterson #include "inode.h" 23b3b94faaSDavid Teigland #include "glock.h" 24b3b94faaSDavid Teigland #include "log.h" 25b3b94faaSDavid Teigland #include "lops.h" 26b3b94faaSDavid Teigland #include "meta_io.h" 27b3b94faaSDavid Teigland #include "recovery.h" 28b3b94faaSDavid Teigland #include "rgrp.h" 29b3b94faaSDavid Teigland #include "trans.h" 305c676f6dSSteven Whitehouse #include "util.h" 3163997775SSteven Whitehouse #include "trace_gfs2.h" 32b3b94faaSDavid Teigland 339b9107a5SSteven Whitehouse /** 349b9107a5SSteven Whitehouse * gfs2_pin - Pin a buffer in memory 359b9107a5SSteven Whitehouse * @sdp: The superblock 369b9107a5SSteven Whitehouse * @bh: The buffer to be pinned 379b9107a5SSteven Whitehouse * 389b9107a5SSteven Whitehouse * The log lock must be held when calling this function 399b9107a5SSteven Whitehouse */ 409b9107a5SSteven Whitehouse static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) 419b9107a5SSteven Whitehouse { 429b9107a5SSteven Whitehouse struct gfs2_bufdata *bd; 439b9107a5SSteven Whitehouse 4429687a2aSSteven Whitehouse BUG_ON(!current->journal_info); 459b9107a5SSteven Whitehouse 469b9107a5SSteven Whitehouse clear_buffer_dirty(bh); 479b9107a5SSteven Whitehouse if (test_set_buffer_pinned(bh)) 489b9107a5SSteven Whitehouse gfs2_assert_withdraw(sdp, 0); 499b9107a5SSteven Whitehouse if (!buffer_uptodate(bh)) 509b9107a5SSteven Whitehouse gfs2_io_error_bh(sdp, bh); 519b9107a5SSteven Whitehouse bd = bh->b_private; 529b9107a5SSteven Whitehouse /* If this buffer is in the AIL and it has already been written 539b9107a5SSteven Whitehouse * to in-place disk block, remove it from the AIL. 549b9107a5SSteven Whitehouse */ 55c618e87aSSteven Whitehouse spin_lock(&sdp->sd_ail_lock); 569b9107a5SSteven Whitehouse if (bd->bd_ail) 579b9107a5SSteven Whitehouse list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); 58c618e87aSSteven Whitehouse spin_unlock(&sdp->sd_ail_lock); 599b9107a5SSteven Whitehouse get_bh(bh); 605e687eacSBenjamin Marzinski atomic_inc(&sdp->sd_log_pinned); 6163997775SSteven Whitehouse trace_gfs2_pin(bd, 1); 629b9107a5SSteven Whitehouse } 639b9107a5SSteven Whitehouse 647c9ca621SBob Peterson static bool buffer_is_rgrp(const struct gfs2_bufdata *bd) 657c9ca621SBob Peterson { 667c9ca621SBob Peterson return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP; 677c9ca621SBob Peterson } 687c9ca621SBob Peterson 697c9ca621SBob Peterson static void maybe_release_space(struct gfs2_bufdata *bd) 707c9ca621SBob Peterson { 717c9ca621SBob Peterson struct gfs2_glock *gl = bd->bd_gl; 727c9ca621SBob Peterson struct gfs2_sbd *sdp = gl->gl_sbd; 737c9ca621SBob Peterson struct gfs2_rgrpd *rgd = gl->gl_object; 747c9ca621SBob Peterson unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number; 757c9ca621SBob Peterson struct gfs2_bitmap *bi = rgd->rd_bits + index; 767c9ca621SBob Peterson 777c9ca621SBob Peterson if (bi->bi_clone == 0) 787c9ca621SBob Peterson return; 797c9ca621SBob Peterson if (sdp->sd_args.ar_discard) 8066fc061bSSteven Whitehouse gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL); 817c9ca621SBob Peterson memcpy(bi->bi_clone + bi->bi_offset, 827c9ca621SBob Peterson bd->bd_bh->b_data + bi->bi_offset, bi->bi_len); 837c9ca621SBob Peterson clear_bit(GBF_FULL, &bi->bi_flags); 847c9ca621SBob Peterson rgd->rd_free_clone = rgd->rd_free; 857c9ca621SBob Peterson } 867c9ca621SBob Peterson 879b9107a5SSteven Whitehouse /** 889b9107a5SSteven Whitehouse * gfs2_unpin - Unpin a buffer 899b9107a5SSteven Whitehouse * @sdp: the filesystem the buffer belongs to 909b9107a5SSteven Whitehouse * @bh: The buffer to unpin 919b9107a5SSteven Whitehouse * @ai: 9229687a2aSSteven Whitehouse * @flags: The inode dirty flags 939b9107a5SSteven Whitehouse * 949b9107a5SSteven Whitehouse */ 959b9107a5SSteven Whitehouse 969b9107a5SSteven Whitehouse static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 979b9107a5SSteven Whitehouse struct gfs2_ail *ai) 989b9107a5SSteven Whitehouse { 999b9107a5SSteven Whitehouse struct gfs2_bufdata *bd = bh->b_private; 1009b9107a5SSteven Whitehouse 10129687a2aSSteven Whitehouse BUG_ON(!buffer_uptodate(bh)); 10229687a2aSSteven Whitehouse BUG_ON(!buffer_pinned(bh)); 1039b9107a5SSteven Whitehouse 1049b9107a5SSteven Whitehouse lock_buffer(bh); 1059b9107a5SSteven Whitehouse mark_buffer_dirty(bh); 1069b9107a5SSteven Whitehouse clear_buffer_pinned(bh); 1079b9107a5SSteven Whitehouse 1087c9ca621SBob Peterson if (buffer_is_rgrp(bd)) 1097c9ca621SBob Peterson maybe_release_space(bd); 1107c9ca621SBob Peterson 111d6a079e8SDave Chinner spin_lock(&sdp->sd_ail_lock); 1129b9107a5SSteven Whitehouse if (bd->bd_ail) { 1139b9107a5SSteven Whitehouse list_del(&bd->bd_ail_st_list); 1149b9107a5SSteven Whitehouse brelse(bh); 1159b9107a5SSteven Whitehouse } else { 1169b9107a5SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 1179b9107a5SSteven Whitehouse list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); 1189b9107a5SSteven Whitehouse atomic_inc(&gl->gl_ail_count); 1199b9107a5SSteven Whitehouse } 1209b9107a5SSteven Whitehouse bd->bd_ail = ai; 1219b9107a5SSteven Whitehouse list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); 122d6a079e8SDave Chinner spin_unlock(&sdp->sd_ail_lock); 123d6a079e8SDave Chinner 12429687a2aSSteven Whitehouse clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 12563997775SSteven Whitehouse trace_gfs2_pin(bd, 0); 1269b9107a5SSteven Whitehouse unlock_buffer(bh); 1275e687eacSBenjamin Marzinski atomic_dec(&sdp->sd_log_pinned); 1289b9107a5SSteven Whitehouse } 1299b9107a5SSteven Whitehouse 130e8c92ed7SSteven Whitehouse static void gfs2_log_incr_head(struct gfs2_sbd *sdp) 13116615be1SSteven Whitehouse { 132e8c92ed7SSteven Whitehouse BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) && 133e8c92ed7SSteven Whitehouse (sdp->sd_log_flush_head != sdp->sd_log_head)); 134e8c92ed7SSteven Whitehouse 135e8c92ed7SSteven Whitehouse if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) { 136e8c92ed7SSteven Whitehouse sdp->sd_log_flush_head = 0; 137e8c92ed7SSteven Whitehouse sdp->sd_log_flush_wrapped = 1; 138e8c92ed7SSteven Whitehouse } 13916615be1SSteven Whitehouse } 14016615be1SSteven Whitehouse 141e8c92ed7SSteven Whitehouse static u64 gfs2_log_bmap(struct gfs2_sbd *sdp) 14216615be1SSteven Whitehouse { 143e8c92ed7SSteven Whitehouse unsigned int lbn = sdp->sd_log_flush_head; 144e8c92ed7SSteven Whitehouse struct gfs2_journal_extent *je; 145e8c92ed7SSteven Whitehouse u64 block; 14616615be1SSteven Whitehouse 147e8c92ed7SSteven Whitehouse list_for_each_entry(je, &sdp->sd_jdesc->extent_list, extent_list) { 148e8c92ed7SSteven Whitehouse if (lbn >= je->lblock && lbn < je->lblock + je->blocks) { 149e8c92ed7SSteven Whitehouse block = je->dblock + lbn - je->lblock; 15047ac5537SSteven Whitehouse gfs2_log_incr_head(sdp); 151e8c92ed7SSteven Whitehouse return block; 152e8c92ed7SSteven Whitehouse } 153e8c92ed7SSteven Whitehouse } 15447ac5537SSteven Whitehouse 155e8c92ed7SSteven Whitehouse return -1; 15647ac5537SSteven Whitehouse } 15747ac5537SSteven Whitehouse 15847ac5537SSteven Whitehouse /** 159e8c92ed7SSteven Whitehouse * gfs2_end_log_write_bh - end log write of pagecache data with buffers 160e8c92ed7SSteven Whitehouse * @sdp: The superblock 161e8c92ed7SSteven Whitehouse * @bvec: The bio_vec 162e8c92ed7SSteven Whitehouse * @error: The i/o status 163e8c92ed7SSteven Whitehouse * 164e8c92ed7SSteven Whitehouse * This finds the relavent buffers and unlocks then and sets the 165e8c92ed7SSteven Whitehouse * error flag according to the status of the i/o request. This is 166e8c92ed7SSteven Whitehouse * used when the log is writing data which has an in-place version 167e8c92ed7SSteven Whitehouse * that is pinned in the pagecache. 168e8c92ed7SSteven Whitehouse */ 169e8c92ed7SSteven Whitehouse 170e8c92ed7SSteven Whitehouse static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec, 171e8c92ed7SSteven Whitehouse int error) 172e8c92ed7SSteven Whitehouse { 173e8c92ed7SSteven Whitehouse struct buffer_head *bh, *next; 174e8c92ed7SSteven Whitehouse struct page *page = bvec->bv_page; 175e8c92ed7SSteven Whitehouse unsigned size; 176e8c92ed7SSteven Whitehouse 177e8c92ed7SSteven Whitehouse bh = page_buffers(page); 178e8c92ed7SSteven Whitehouse size = bvec->bv_len; 179e8c92ed7SSteven Whitehouse while (bh_offset(bh) < bvec->bv_offset) 180e8c92ed7SSteven Whitehouse bh = bh->b_this_page; 181e8c92ed7SSteven Whitehouse do { 182e8c92ed7SSteven Whitehouse if (error) 183e8c92ed7SSteven Whitehouse set_buffer_write_io_error(bh); 184e8c92ed7SSteven Whitehouse unlock_buffer(bh); 185e8c92ed7SSteven Whitehouse next = bh->b_this_page; 186e8c92ed7SSteven Whitehouse size -= bh->b_size; 187e8c92ed7SSteven Whitehouse brelse(bh); 188e8c92ed7SSteven Whitehouse bh = next; 189e8c92ed7SSteven Whitehouse } while(bh && size); 190e8c92ed7SSteven Whitehouse } 191e8c92ed7SSteven Whitehouse 192e8c92ed7SSteven Whitehouse /** 193e8c92ed7SSteven Whitehouse * gfs2_end_log_write - end of i/o to the log 194e8c92ed7SSteven Whitehouse * @bio: The bio 195e8c92ed7SSteven Whitehouse * @error: Status of i/o request 196e8c92ed7SSteven Whitehouse * 197e8c92ed7SSteven Whitehouse * Each bio_vec contains either data from the pagecache or data 198e8c92ed7SSteven Whitehouse * relating to the log itself. Here we iterate over the bio_vec 199e8c92ed7SSteven Whitehouse * array, processing both kinds of data. 20047ac5537SSteven Whitehouse * 20147ac5537SSteven Whitehouse */ 20247ac5537SSteven Whitehouse 203e8c92ed7SSteven Whitehouse static void gfs2_end_log_write(struct bio *bio, int error) 20447ac5537SSteven Whitehouse { 205e8c92ed7SSteven Whitehouse struct gfs2_sbd *sdp = bio->bi_private; 206e8c92ed7SSteven Whitehouse struct bio_vec *bvec; 207e8c92ed7SSteven Whitehouse struct page *page; 208e8c92ed7SSteven Whitehouse int i; 20947ac5537SSteven Whitehouse 210e8c92ed7SSteven Whitehouse if (error) { 211e8c92ed7SSteven Whitehouse sdp->sd_log_error = error; 212e8c92ed7SSteven Whitehouse fs_err(sdp, "Error %d writing to log\n", error); 213e8c92ed7SSteven Whitehouse } 214e8c92ed7SSteven Whitehouse 215e8c92ed7SSteven Whitehouse bio_for_each_segment(bvec, bio, i) { 216e8c92ed7SSteven Whitehouse page = bvec->bv_page; 217e8c92ed7SSteven Whitehouse if (page_has_buffers(page)) 218e8c92ed7SSteven Whitehouse gfs2_end_log_write_bh(sdp, bvec, error); 219e8c92ed7SSteven Whitehouse else 220e8c92ed7SSteven Whitehouse mempool_free(page, gfs2_page_pool); 221e8c92ed7SSteven Whitehouse } 222e8c92ed7SSteven Whitehouse 223e8c92ed7SSteven Whitehouse bio_put(bio); 22447ac5537SSteven Whitehouse if (atomic_dec_and_test(&sdp->sd_log_in_flight)) 22547ac5537SSteven Whitehouse wake_up(&sdp->sd_log_flush_wait); 22647ac5537SSteven Whitehouse } 22747ac5537SSteven Whitehouse 22847ac5537SSteven Whitehouse /** 229e8c92ed7SSteven Whitehouse * gfs2_log_flush_bio - Submit any pending log bio 230e8c92ed7SSteven Whitehouse * @sdp: The superblock 231e8c92ed7SSteven Whitehouse * @rw: The rw flags 232e8c92ed7SSteven Whitehouse * 233e8c92ed7SSteven Whitehouse * Submit any pending part-built or full bio to the block device. If 234e8c92ed7SSteven Whitehouse * there is no pending bio, then this is a no-op. 235e8c92ed7SSteven Whitehouse */ 236e8c92ed7SSteven Whitehouse 237e8c92ed7SSteven Whitehouse void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw) 238e8c92ed7SSteven Whitehouse { 239e8c92ed7SSteven Whitehouse if (sdp->sd_log_bio) { 240e8c92ed7SSteven Whitehouse atomic_inc(&sdp->sd_log_in_flight); 241e8c92ed7SSteven Whitehouse submit_bio(rw, sdp->sd_log_bio); 242e8c92ed7SSteven Whitehouse sdp->sd_log_bio = NULL; 243e8c92ed7SSteven Whitehouse } 244e8c92ed7SSteven Whitehouse } 245e8c92ed7SSteven Whitehouse 246e8c92ed7SSteven Whitehouse /** 247e8c92ed7SSteven Whitehouse * gfs2_log_alloc_bio - Allocate a new bio for log writing 248e8c92ed7SSteven Whitehouse * @sdp: The superblock 249e8c92ed7SSteven Whitehouse * @blkno: The next device block number we want to write to 250e8c92ed7SSteven Whitehouse * 251e8c92ed7SSteven Whitehouse * This should never be called when there is a cached bio in the 252e8c92ed7SSteven Whitehouse * super block. When it returns, there will be a cached bio in the 253e8c92ed7SSteven Whitehouse * super block which will have as many bio_vecs as the device is 254e8c92ed7SSteven Whitehouse * happy to handle. 255e8c92ed7SSteven Whitehouse * 256e8c92ed7SSteven Whitehouse * Returns: Newly allocated bio 257e8c92ed7SSteven Whitehouse */ 258e8c92ed7SSteven Whitehouse 259e8c92ed7SSteven Whitehouse static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno) 260e8c92ed7SSteven Whitehouse { 261e8c92ed7SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 262e8c92ed7SSteven Whitehouse unsigned nrvecs = bio_get_nr_vecs(sb->s_bdev); 263e8c92ed7SSteven Whitehouse struct bio *bio; 264e8c92ed7SSteven Whitehouse 265e8c92ed7SSteven Whitehouse BUG_ON(sdp->sd_log_bio); 266e8c92ed7SSteven Whitehouse 267e8c92ed7SSteven Whitehouse while (1) { 268e8c92ed7SSteven Whitehouse bio = bio_alloc(GFP_NOIO, nrvecs); 269e8c92ed7SSteven Whitehouse if (likely(bio)) 270e8c92ed7SSteven Whitehouse break; 271e8c92ed7SSteven Whitehouse nrvecs = max(nrvecs/2, 1U); 272e8c92ed7SSteven Whitehouse } 273e8c92ed7SSteven Whitehouse 274e8c92ed7SSteven Whitehouse bio->bi_sector = blkno * (sb->s_blocksize >> 9); 275e8c92ed7SSteven Whitehouse bio->bi_bdev = sb->s_bdev; 276e8c92ed7SSteven Whitehouse bio->bi_end_io = gfs2_end_log_write; 277e8c92ed7SSteven Whitehouse bio->bi_private = sdp; 278e8c92ed7SSteven Whitehouse 279e8c92ed7SSteven Whitehouse sdp->sd_log_bio = bio; 280e8c92ed7SSteven Whitehouse 281e8c92ed7SSteven Whitehouse return bio; 282e8c92ed7SSteven Whitehouse } 283e8c92ed7SSteven Whitehouse 284e8c92ed7SSteven Whitehouse /** 285e8c92ed7SSteven Whitehouse * gfs2_log_get_bio - Get cached log bio, or allocate a new one 286e8c92ed7SSteven Whitehouse * @sdp: The superblock 287e8c92ed7SSteven Whitehouse * @blkno: The device block number we want to write to 288e8c92ed7SSteven Whitehouse * 289e8c92ed7SSteven Whitehouse * If there is a cached bio, then if the next block number is sequential 290e8c92ed7SSteven Whitehouse * with the previous one, return it, otherwise flush the bio to the 291e8c92ed7SSteven Whitehouse * device. If there is not a cached bio, or we just flushed it, then 292e8c92ed7SSteven Whitehouse * allocate a new one. 293e8c92ed7SSteven Whitehouse * 294e8c92ed7SSteven Whitehouse * Returns: The bio to use for log writes 295e8c92ed7SSteven Whitehouse */ 296e8c92ed7SSteven Whitehouse 297e8c92ed7SSteven Whitehouse static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno) 298e8c92ed7SSteven Whitehouse { 299e8c92ed7SSteven Whitehouse struct bio *bio = sdp->sd_log_bio; 300e8c92ed7SSteven Whitehouse u64 nblk; 301e8c92ed7SSteven Whitehouse 302e8c92ed7SSteven Whitehouse if (bio) { 303e8c92ed7SSteven Whitehouse nblk = bio->bi_sector + bio_sectors(bio); 304e8c92ed7SSteven Whitehouse nblk >>= sdp->sd_fsb2bb_shift; 305e8c92ed7SSteven Whitehouse if (blkno == nblk) 306e8c92ed7SSteven Whitehouse return bio; 307e8c92ed7SSteven Whitehouse gfs2_log_flush_bio(sdp, WRITE); 308e8c92ed7SSteven Whitehouse } 309e8c92ed7SSteven Whitehouse 310e8c92ed7SSteven Whitehouse return gfs2_log_alloc_bio(sdp, blkno); 311e8c92ed7SSteven Whitehouse } 312e8c92ed7SSteven Whitehouse 313e8c92ed7SSteven Whitehouse 314e8c92ed7SSteven Whitehouse /** 315e8c92ed7SSteven Whitehouse * gfs2_log_write - write to log 31647ac5537SSteven Whitehouse * @sdp: the filesystem 317e8c92ed7SSteven Whitehouse * @page: the page to write 318e8c92ed7SSteven Whitehouse * @size: the size of the data to write 319e8c92ed7SSteven Whitehouse * @offset: the offset within the page 32047ac5537SSteven Whitehouse * 321e8c92ed7SSteven Whitehouse * Try and add the page segment to the current bio. If that fails, 322e8c92ed7SSteven Whitehouse * submit the current bio to the device and create a new one, and 323e8c92ed7SSteven Whitehouse * then add the page segment to that. 32447ac5537SSteven Whitehouse */ 32547ac5537SSteven Whitehouse 326e8c92ed7SSteven Whitehouse static void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page, 327e8c92ed7SSteven Whitehouse unsigned size, unsigned offset) 32847ac5537SSteven Whitehouse { 329e8c92ed7SSteven Whitehouse u64 blkno = gfs2_log_bmap(sdp); 330e8c92ed7SSteven Whitehouse struct bio *bio; 331e8c92ed7SSteven Whitehouse int ret; 33247ac5537SSteven Whitehouse 333e8c92ed7SSteven Whitehouse bio = gfs2_log_get_bio(sdp, blkno); 334e8c92ed7SSteven Whitehouse ret = bio_add_page(bio, page, size, offset); 335e8c92ed7SSteven Whitehouse if (ret == 0) { 336e8c92ed7SSteven Whitehouse gfs2_log_flush_bio(sdp, WRITE); 337e8c92ed7SSteven Whitehouse bio = gfs2_log_alloc_bio(sdp, blkno); 338e8c92ed7SSteven Whitehouse ret = bio_add_page(bio, page, size, offset); 339e8c92ed7SSteven Whitehouse WARN_ON(ret == 0); 340e8c92ed7SSteven Whitehouse } 34147ac5537SSteven Whitehouse } 34216615be1SSteven Whitehouse 343e8c92ed7SSteven Whitehouse /** 344e8c92ed7SSteven Whitehouse * gfs2_log_write_bh - write a buffer's content to the log 345e8c92ed7SSteven Whitehouse * @sdp: The super block 346e8c92ed7SSteven Whitehouse * @bh: The buffer pointing to the in-place location 347e8c92ed7SSteven Whitehouse * 348e8c92ed7SSteven Whitehouse * This writes the content of the buffer to the next available location 349e8c92ed7SSteven Whitehouse * in the log. The buffer will be unlocked once the i/o to the log has 350e8c92ed7SSteven Whitehouse * completed. 351e8c92ed7SSteven Whitehouse */ 352e8c92ed7SSteven Whitehouse 353e8c92ed7SSteven Whitehouse static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) 35416615be1SSteven Whitehouse { 355e8c92ed7SSteven Whitehouse gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh)); 356e8c92ed7SSteven Whitehouse } 357e8c92ed7SSteven Whitehouse 358e8c92ed7SSteven Whitehouse /** 359e8c92ed7SSteven Whitehouse * gfs2_log_write_page - write one block stored in a page, into the log 360e8c92ed7SSteven Whitehouse * @sdp: The superblock 361e8c92ed7SSteven Whitehouse * @page: The struct page 362e8c92ed7SSteven Whitehouse * 363e8c92ed7SSteven Whitehouse * This writes the first block-sized part of the page into the log. Note 364e8c92ed7SSteven Whitehouse * that the page must have been allocated from the gfs2_page_pool mempool 365e8c92ed7SSteven Whitehouse * and that after this has been called, ownership has been transferred and 366e8c92ed7SSteven Whitehouse * the page may be freed at any time. 367e8c92ed7SSteven Whitehouse */ 368e8c92ed7SSteven Whitehouse 369e8c92ed7SSteven Whitehouse void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) 370e8c92ed7SSteven Whitehouse { 371e8c92ed7SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 372e8c92ed7SSteven Whitehouse gfs2_log_write(sdp, page, sb->s_blocksize, 0); 373e8c92ed7SSteven Whitehouse } 374e8c92ed7SSteven Whitehouse 375dad30e90SSteven Whitehouse static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type, 376dad30e90SSteven Whitehouse u32 ld_length, u32 ld_data1) 377e8c92ed7SSteven Whitehouse { 378e8c92ed7SSteven Whitehouse void *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 379e8c92ed7SSteven Whitehouse struct gfs2_log_descriptor *ld = page_address(page); 380e8c92ed7SSteven Whitehouse clear_page(ld); 38116615be1SSteven Whitehouse ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 38216615be1SSteven Whitehouse ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 38316615be1SSteven Whitehouse ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 38416615be1SSteven Whitehouse ld->ld_type = cpu_to_be32(ld_type); 385dad30e90SSteven Whitehouse ld->ld_length = cpu_to_be32(ld_length); 386dad30e90SSteven Whitehouse ld->ld_data1 = cpu_to_be32(ld_data1); 38716615be1SSteven Whitehouse ld->ld_data2 = 0; 388e8c92ed7SSteven Whitehouse return page; 38916615be1SSteven Whitehouse } 39016615be1SSteven Whitehouse 391b3b94faaSDavid Teigland static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 392b3b94faaSDavid Teigland { 393b3b94faaSDavid Teigland struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 3940ab7d13fSSteven Whitehouse struct gfs2_meta_header *mh; 395b3b94faaSDavid Teigland struct gfs2_trans *tr; 396b3b94faaSDavid Teigland 3979b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 3988bd95727SSteven Whitehouse gfs2_log_lock(sdp); 3999b9107a5SSteven Whitehouse if (!list_empty(&bd->bd_list_tr)) 4009b9107a5SSteven Whitehouse goto out; 4015c676f6dSSteven Whitehouse tr = current->journal_info; 402b3b94faaSDavid Teigland tr->tr_touched = 1; 403b3b94faaSDavid Teigland tr->tr_num_buf++; 404b3b94faaSDavid Teigland list_add(&bd->bd_list_tr, &tr->tr_list_buf); 405b3b94faaSDavid Teigland if (!list_empty(&le->le_list)) 4069b9107a5SSteven Whitehouse goto out; 4072bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 4082bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 409b3b94faaSDavid Teigland gfs2_meta_check(sdp, bd->bd_bh); 410a98ab220SSteven Whitehouse gfs2_pin(sdp, bd->bd_bh); 4110ab7d13fSSteven Whitehouse mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; 4120ab7d13fSSteven Whitehouse mh->__pad0 = cpu_to_be64(0); 4130ab7d13fSSteven Whitehouse mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); 414b3b94faaSDavid Teigland sdp->sd_log_num_buf++; 415b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_buf); 416b3b94faaSDavid Teigland tr->tr_num_buf_new++; 4179b9107a5SSteven Whitehouse out: 4189b9107a5SSteven Whitehouse gfs2_log_unlock(sdp); 4199b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 420b3b94faaSDavid Teigland } 421b3b94faaSDavid Teigland 422dad30e90SSteven Whitehouse static void gfs2_check_magic(struct buffer_head *bh) 423dad30e90SSteven Whitehouse { 424dad30e90SSteven Whitehouse void *kaddr; 425dad30e90SSteven Whitehouse __be32 *ptr; 426dad30e90SSteven Whitehouse 427dad30e90SSteven Whitehouse clear_buffer_escaped(bh); 428dad30e90SSteven Whitehouse kaddr = kmap_atomic(bh->b_page); 429dad30e90SSteven Whitehouse ptr = kaddr + bh_offset(bh); 430dad30e90SSteven Whitehouse if (*ptr == cpu_to_be32(GFS2_MAGIC)) 431dad30e90SSteven Whitehouse set_buffer_escaped(bh); 432dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 433dad30e90SSteven Whitehouse } 434dad30e90SSteven Whitehouse 435dad30e90SSteven Whitehouse static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, 436dad30e90SSteven Whitehouse unsigned int total, struct list_head *blist, 437dad30e90SSteven Whitehouse bool is_databuf) 438b3b94faaSDavid Teigland { 439b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 440b3b94faaSDavid Teigland struct gfs2_bufdata *bd1 = NULL, *bd2; 441e8c92ed7SSteven Whitehouse struct page *page; 442b3b94faaSDavid Teigland unsigned int num; 443b3b94faaSDavid Teigland unsigned n; 444b3b94faaSDavid Teigland __be64 *ptr; 445b3b94faaSDavid Teigland 446905d2aefSBob Peterson gfs2_log_lock(sdp); 447dad30e90SSteven Whitehouse bd1 = bd2 = list_prepare_entry(bd1, blist, bd_le.le_list); 448b3b94faaSDavid Teigland while(total) { 449b3b94faaSDavid Teigland num = total; 450b3b94faaSDavid Teigland if (total > limit) 451b3b94faaSDavid Teigland num = limit; 452905d2aefSBob Peterson gfs2_log_unlock(sdp); 453dad30e90SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA, num + 1, num); 454e8c92ed7SSteven Whitehouse ld = page_address(page); 455905d2aefSBob Peterson gfs2_log_lock(sdp); 456e8c92ed7SSteven Whitehouse ptr = (__be64 *)(ld + 1); 457b3b94faaSDavid Teigland 458b3b94faaSDavid Teigland n = 0; 459dad30e90SSteven Whitehouse list_for_each_entry_continue(bd1, blist, bd_le.le_list) { 460b3b94faaSDavid Teigland *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 461dad30e90SSteven Whitehouse if (is_databuf) { 462dad30e90SSteven Whitehouse gfs2_check_magic(bd1->bd_bh); 463dad30e90SSteven Whitehouse *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); 464dad30e90SSteven Whitehouse } 465b3b94faaSDavid Teigland if (++n >= num) 466b3b94faaSDavid Teigland break; 467b3b94faaSDavid Teigland } 468b3b94faaSDavid Teigland 469905d2aefSBob Peterson gfs2_log_unlock(sdp); 470e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 471905d2aefSBob Peterson gfs2_log_lock(sdp); 472b3b94faaSDavid Teigland 473b3b94faaSDavid Teigland n = 0; 474dad30e90SSteven Whitehouse list_for_each_entry_continue(bd2, blist, bd_le.le_list) { 47516615be1SSteven Whitehouse get_bh(bd2->bd_bh); 476905d2aefSBob Peterson gfs2_log_unlock(sdp); 47716615be1SSteven Whitehouse lock_buffer(bd2->bd_bh); 478dad30e90SSteven Whitehouse 479dad30e90SSteven Whitehouse if (buffer_escaped(bd2->bd_bh)) { 480dad30e90SSteven Whitehouse void *kaddr; 481dad30e90SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 482dad30e90SSteven Whitehouse ptr = page_address(page); 483dad30e90SSteven Whitehouse kaddr = kmap_atomic(bd2->bd_bh->b_page); 484dad30e90SSteven Whitehouse memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), 485dad30e90SSteven Whitehouse bd2->bd_bh->b_size); 486dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 487dad30e90SSteven Whitehouse *(__be32 *)ptr = 0; 488dad30e90SSteven Whitehouse clear_buffer_escaped(bd2->bd_bh); 489dad30e90SSteven Whitehouse unlock_buffer(bd2->bd_bh); 490dad30e90SSteven Whitehouse brelse(bd2->bd_bh); 491dad30e90SSteven Whitehouse gfs2_log_write_page(sdp, page); 492dad30e90SSteven Whitehouse } else { 493e8c92ed7SSteven Whitehouse gfs2_log_write_bh(sdp, bd2->bd_bh); 494dad30e90SSteven Whitehouse } 495905d2aefSBob Peterson gfs2_log_lock(sdp); 496b3b94faaSDavid Teigland if (++n >= num) 497b3b94faaSDavid Teigland break; 498b3b94faaSDavid Teigland } 499b3b94faaSDavid Teigland 500905d2aefSBob Peterson BUG_ON(total < num); 501b3b94faaSDavid Teigland total -= num; 502b3b94faaSDavid Teigland } 503905d2aefSBob Peterson gfs2_log_unlock(sdp); 504b3b94faaSDavid Teigland } 505b3b94faaSDavid Teigland 506dad30e90SSteven Whitehouse static void buf_lo_before_commit(struct gfs2_sbd *sdp) 507dad30e90SSteven Whitehouse { 508dad30e90SSteven Whitehouse unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ 509dad30e90SSteven Whitehouse 510dad30e90SSteven Whitehouse gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf, 511dad30e90SSteven Whitehouse &sdp->sd_log_le_buf, 0); 512dad30e90SSteven Whitehouse } 513dad30e90SSteven Whitehouse 514b3b94faaSDavid Teigland static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 515b3b94faaSDavid Teigland { 516b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_buf; 517b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 518b3b94faaSDavid Teigland 519b3b94faaSDavid Teigland while (!list_empty(head)) { 520b3b94faaSDavid Teigland bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 521b3b94faaSDavid Teigland list_del_init(&bd->bd_le.le_list); 522b3b94faaSDavid Teigland sdp->sd_log_num_buf--; 523b3b94faaSDavid Teigland 524a98ab220SSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 525b3b94faaSDavid Teigland } 526b3b94faaSDavid Teigland gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); 527b3b94faaSDavid Teigland } 528b3b94faaSDavid Teigland 529b3b94faaSDavid Teigland static void buf_lo_before_scan(struct gfs2_jdesc *jd, 53055167622SAl Viro struct gfs2_log_header_host *head, int pass) 531b3b94faaSDavid Teigland { 532feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 533b3b94faaSDavid Teigland 534b3b94faaSDavid Teigland if (pass != 0) 535b3b94faaSDavid Teigland return; 536b3b94faaSDavid Teigland 537b3b94faaSDavid Teigland sdp->sd_found_blocks = 0; 538b3b94faaSDavid Teigland sdp->sd_replayed_blocks = 0; 539b3b94faaSDavid Teigland } 540b3b94faaSDavid Teigland 541b3b94faaSDavid Teigland static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 542b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 543b3b94faaSDavid Teigland int pass) 544b3b94faaSDavid Teigland { 545feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 546feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 5475c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 548b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_data1); 549b3b94faaSDavid Teigland struct buffer_head *bh_log, *bh_ip; 550cd915493SSteven Whitehouse u64 blkno; 551b3b94faaSDavid Teigland int error = 0; 552b3b94faaSDavid Teigland 553b3b94faaSDavid Teigland if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 554b3b94faaSDavid Teigland return 0; 555b3b94faaSDavid Teigland 556b3b94faaSDavid Teigland gfs2_replay_incr_blk(sdp, &start); 557b3b94faaSDavid Teigland 558b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 559b3b94faaSDavid Teigland blkno = be64_to_cpu(*ptr++); 560b3b94faaSDavid Teigland 561b3b94faaSDavid Teigland sdp->sd_found_blocks++; 562b3b94faaSDavid Teigland 563b3b94faaSDavid Teigland if (gfs2_revoke_check(sdp, blkno, start)) 564b3b94faaSDavid Teigland continue; 565b3b94faaSDavid Teigland 566b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh_log); 567b3b94faaSDavid Teigland if (error) 568b3b94faaSDavid Teigland return error; 569b3b94faaSDavid Teigland 570b3b94faaSDavid Teigland bh_ip = gfs2_meta_new(gl, blkno); 571b3b94faaSDavid Teigland memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 572b3b94faaSDavid Teigland 573b3b94faaSDavid Teigland if (gfs2_meta_check(sdp, bh_ip)) 574b3b94faaSDavid Teigland error = -EIO; 575b3b94faaSDavid Teigland else 576b3b94faaSDavid Teigland mark_buffer_dirty(bh_ip); 577b3b94faaSDavid Teigland 578b3b94faaSDavid Teigland brelse(bh_log); 579b3b94faaSDavid Teigland brelse(bh_ip); 580b3b94faaSDavid Teigland 581b3b94faaSDavid Teigland if (error) 582b3b94faaSDavid Teigland break; 583b3b94faaSDavid Teigland 584b3b94faaSDavid Teigland sdp->sd_replayed_blocks++; 585b3b94faaSDavid Teigland } 586b3b94faaSDavid Teigland 587b3b94faaSDavid Teigland return error; 588b3b94faaSDavid Teigland } 589b3b94faaSDavid Teigland 590b3b94faaSDavid Teigland static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 591b3b94faaSDavid Teigland { 592feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 593feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 594b3b94faaSDavid Teigland 595b3b94faaSDavid Teigland if (error) { 5967276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 597b3b94faaSDavid Teigland return; 598b3b94faaSDavid Teigland } 599b3b94faaSDavid Teigland if (pass != 1) 600b3b94faaSDavid Teigland return; 601b3b94faaSDavid Teigland 6027276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 603b3b94faaSDavid Teigland 604b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 605b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 606b3b94faaSDavid Teigland } 607b3b94faaSDavid Teigland 608b3b94faaSDavid Teigland static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 609b3b94faaSDavid Teigland { 610f42ab085SSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 611f42ab085SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 612b3b94faaSDavid Teigland struct gfs2_trans *tr; 613b3b94faaSDavid Teigland 6145c676f6dSSteven Whitehouse tr = current->journal_info; 615b3b94faaSDavid Teigland tr->tr_touched = 1; 616b3b94faaSDavid Teigland tr->tr_num_revoke++; 617b3b94faaSDavid Teigland sdp->sd_log_num_revoke++; 618f42ab085SSteven Whitehouse atomic_inc(&gl->gl_revokes); 619f42ab085SSteven Whitehouse set_bit(GLF_LFLUSH, &gl->gl_flags); 620b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_revoke); 621b3b94faaSDavid Teigland } 622b3b94faaSDavid Teigland 623b3b94faaSDavid Teigland static void revoke_lo_before_commit(struct gfs2_sbd *sdp) 624b3b94faaSDavid Teigland { 625b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 626b3b94faaSDavid Teigland struct gfs2_meta_header *mh; 627b3b94faaSDavid Teigland unsigned int offset; 628b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_revoke; 62982e86087SSteven Whitehouse struct gfs2_bufdata *bd; 630e8c92ed7SSteven Whitehouse struct page *page; 631dad30e90SSteven Whitehouse unsigned int length; 632b3b94faaSDavid Teigland 633b3b94faaSDavid Teigland if (!sdp->sd_log_num_revoke) 634b3b94faaSDavid Teigland return; 635b3b94faaSDavid Teigland 636dad30e90SSteven Whitehouse length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); 637dad30e90SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); 638e8c92ed7SSteven Whitehouse ld = page_address(page); 639b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 640b3b94faaSDavid Teigland 641f42ab085SSteven Whitehouse list_for_each_entry(bd, head, bd_le.le_list) { 642b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 643b3b94faaSDavid Teigland 644cd915493SSteven Whitehouse if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 645b3b94faaSDavid Teigland 646e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 647e8c92ed7SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 648e8c92ed7SSteven Whitehouse mh = page_address(page); 649e8c92ed7SSteven Whitehouse clear_page(mh); 650b3b94faaSDavid Teigland mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 651e3167dedSSteven Whitehouse mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 652e3167dedSSteven Whitehouse mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 653b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 654b3b94faaSDavid Teigland } 655b3b94faaSDavid Teigland 656e8c92ed7SSteven Whitehouse *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 657cd915493SSteven Whitehouse offset += sizeof(u64); 658b3b94faaSDavid Teigland } 659b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 660b3b94faaSDavid Teigland 661e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 662b3b94faaSDavid Teigland } 663b3b94faaSDavid Teigland 664f42ab085SSteven Whitehouse static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 665f42ab085SSteven Whitehouse { 666f42ab085SSteven Whitehouse struct list_head *head = &sdp->sd_log_le_revoke; 667f42ab085SSteven Whitehouse struct gfs2_bufdata *bd; 668f42ab085SSteven Whitehouse struct gfs2_glock *gl; 669f42ab085SSteven Whitehouse 670f42ab085SSteven Whitehouse while (!list_empty(head)) { 671f42ab085SSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 672f42ab085SSteven Whitehouse list_del_init(&bd->bd_le.le_list); 673f42ab085SSteven Whitehouse gl = bd->bd_gl; 674f42ab085SSteven Whitehouse atomic_dec(&gl->gl_revokes); 675f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 676f42ab085SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 677f42ab085SSteven Whitehouse } 678f42ab085SSteven Whitehouse } 679f42ab085SSteven Whitehouse 680b3b94faaSDavid Teigland static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 68155167622SAl Viro struct gfs2_log_header_host *head, int pass) 682b3b94faaSDavid Teigland { 683feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 684b3b94faaSDavid Teigland 685b3b94faaSDavid Teigland if (pass != 0) 686b3b94faaSDavid Teigland return; 687b3b94faaSDavid Teigland 688b3b94faaSDavid Teigland sdp->sd_found_revokes = 0; 689b3b94faaSDavid Teigland sdp->sd_replay_tail = head->lh_tail; 690b3b94faaSDavid Teigland } 691b3b94faaSDavid Teigland 692b3b94faaSDavid Teigland static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 693b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 694b3b94faaSDavid Teigland int pass) 695b3b94faaSDavid Teigland { 696feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 697b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_length); 698b3b94faaSDavid Teigland unsigned int revokes = be32_to_cpu(ld->ld_data1); 699b3b94faaSDavid Teigland struct buffer_head *bh; 700b3b94faaSDavid Teigland unsigned int offset; 701cd915493SSteven Whitehouse u64 blkno; 702b3b94faaSDavid Teigland int first = 1; 703b3b94faaSDavid Teigland int error; 704b3b94faaSDavid Teigland 705b3b94faaSDavid Teigland if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 706b3b94faaSDavid Teigland return 0; 707b3b94faaSDavid Teigland 708b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 709b3b94faaSDavid Teigland 710b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 711b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh); 712b3b94faaSDavid Teigland if (error) 713b3b94faaSDavid Teigland return error; 714b3b94faaSDavid Teigland 715b3b94faaSDavid Teigland if (!first) 716b3b94faaSDavid Teigland gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 717b3b94faaSDavid Teigland 718cd915493SSteven Whitehouse while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 719b3b94faaSDavid Teigland blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 720b3b94faaSDavid Teigland 721b3b94faaSDavid Teigland error = gfs2_revoke_add(sdp, blkno, start); 7223ad62e87SBob Peterson if (error < 0) { 7233ad62e87SBob Peterson brelse(bh); 724b3b94faaSDavid Teigland return error; 7253ad62e87SBob Peterson } 726b3b94faaSDavid Teigland else if (error) 727b3b94faaSDavid Teigland sdp->sd_found_revokes++; 728b3b94faaSDavid Teigland 729b3b94faaSDavid Teigland if (!--revokes) 730b3b94faaSDavid Teigland break; 731cd915493SSteven Whitehouse offset += sizeof(u64); 732b3b94faaSDavid Teigland } 733b3b94faaSDavid Teigland 734b3b94faaSDavid Teigland brelse(bh); 735b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 736b3b94faaSDavid Teigland first = 0; 737b3b94faaSDavid Teigland } 738b3b94faaSDavid Teigland 739b3b94faaSDavid Teigland return 0; 740b3b94faaSDavid Teigland } 741b3b94faaSDavid Teigland 742b3b94faaSDavid Teigland static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 743b3b94faaSDavid Teigland { 744feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 745b3b94faaSDavid Teigland 746b3b94faaSDavid Teigland if (error) { 747b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 748b3b94faaSDavid Teigland return; 749b3b94faaSDavid Teigland } 750b3b94faaSDavid Teigland if (pass != 1) 751b3b94faaSDavid Teigland return; 752b3b94faaSDavid Teigland 753b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Found %u revoke tags\n", 754b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_found_revokes); 755b3b94faaSDavid Teigland 756b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 757b3b94faaSDavid Teigland } 758b3b94faaSDavid Teigland 75918ec7d5cSSteven Whitehouse /** 76018ec7d5cSSteven Whitehouse * databuf_lo_add - Add a databuf to the transaction. 76118ec7d5cSSteven Whitehouse * 76218ec7d5cSSteven Whitehouse * This is used in two distinct cases: 76318ec7d5cSSteven Whitehouse * i) In ordered write mode 76418ec7d5cSSteven Whitehouse * We put the data buffer on a list so that we can ensure that its 76518ec7d5cSSteven Whitehouse * synced to disk at the right time 76618ec7d5cSSteven Whitehouse * ii) In journaled data mode 76718ec7d5cSSteven Whitehouse * We need to journal the data block in the same way as metadata in 76818ec7d5cSSteven Whitehouse * the functions above. The difference is that here we have a tag 76918ec7d5cSSteven Whitehouse * which is two __be64's being the block number (as per meta data) 77018ec7d5cSSteven Whitehouse * and a flag which says whether the data block needs escaping or 77118ec7d5cSSteven Whitehouse * not. This means we need a new log entry for each 251 or so data 77218ec7d5cSSteven Whitehouse * blocks, which isn't an enormous overhead but twice as much as 77318ec7d5cSSteven Whitehouse * for normal metadata blocks. 77418ec7d5cSSteven Whitehouse */ 775b3b94faaSDavid Teigland static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 776b3b94faaSDavid Teigland { 77718ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 7785c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 77918ec7d5cSSteven Whitehouse struct address_space *mapping = bd->bd_bh->b_page->mapping; 780feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 781b3b94faaSDavid Teigland 7829b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 7838bd95727SSteven Whitehouse gfs2_log_lock(sdp); 7849ff8ec32SSteven Whitehouse if (tr) { 7859b9107a5SSteven Whitehouse if (!list_empty(&bd->bd_list_tr)) 7869b9107a5SSteven Whitehouse goto out; 78718ec7d5cSSteven Whitehouse tr->tr_touched = 1; 788773ed1a0SRobert Peterson if (gfs2_is_jdata(ip)) { 78918ec7d5cSSteven Whitehouse tr->tr_num_buf++; 79018ec7d5cSSteven Whitehouse list_add(&bd->bd_list_tr, &tr->tr_list_buf); 791773ed1a0SRobert Peterson } 7929ff8ec32SSteven Whitehouse } 793ddf4b426SBenjamin Marzinski if (!list_empty(&le->le_list)) 7949b9107a5SSteven Whitehouse goto out; 7952332c443SRobert Peterson 7962bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 7972bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 7982332c443SRobert Peterson if (gfs2_is_jdata(ip)) { 7992332c443SRobert Peterson gfs2_pin(sdp, bd->bd_bh); 8002332c443SRobert Peterson tr->tr_num_databuf_new++; 801bdcb8856SBob Peterson sdp->sd_log_num_databuf++; 802e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_databuf); 803d7b616e2SSteven Whitehouse } else { 804e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_ordered); 805d7b616e2SSteven Whitehouse } 8069b9107a5SSteven Whitehouse out: 807b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 8089b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 809b3b94faaSDavid Teigland } 810b3b94faaSDavid Teigland 81118ec7d5cSSteven Whitehouse /** 81218ec7d5cSSteven Whitehouse * databuf_lo_before_commit - Scan the data buffers, writing as we go 81318ec7d5cSSteven Whitehouse * 81418ec7d5cSSteven Whitehouse */ 815d7b616e2SSteven Whitehouse 816b3b94faaSDavid Teigland static void databuf_lo_before_commit(struct gfs2_sbd *sdp) 817b3b94faaSDavid Teigland { 818dad30e90SSteven Whitehouse unsigned int limit = buf_limit(sdp) / 2; 819b3b94faaSDavid Teigland 820dad30e90SSteven Whitehouse gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf, 821dad30e90SSteven Whitehouse &sdp->sd_log_le_databuf, 1); 822b3b94faaSDavid Teigland } 823b3b94faaSDavid Teigland 82418ec7d5cSSteven Whitehouse static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 82518ec7d5cSSteven Whitehouse struct gfs2_log_descriptor *ld, 82618ec7d5cSSteven Whitehouse __be64 *ptr, int pass) 82718ec7d5cSSteven Whitehouse { 828feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 829feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 8305c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 83118ec7d5cSSteven Whitehouse unsigned int blks = be32_to_cpu(ld->ld_data1); 83218ec7d5cSSteven Whitehouse struct buffer_head *bh_log, *bh_ip; 833cd915493SSteven Whitehouse u64 blkno; 834cd915493SSteven Whitehouse u64 esc; 83518ec7d5cSSteven Whitehouse int error = 0; 83618ec7d5cSSteven Whitehouse 83718ec7d5cSSteven Whitehouse if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 83818ec7d5cSSteven Whitehouse return 0; 83918ec7d5cSSteven Whitehouse 84018ec7d5cSSteven Whitehouse gfs2_replay_incr_blk(sdp, &start); 84118ec7d5cSSteven Whitehouse for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 84218ec7d5cSSteven Whitehouse blkno = be64_to_cpu(*ptr++); 84318ec7d5cSSteven Whitehouse esc = be64_to_cpu(*ptr++); 84418ec7d5cSSteven Whitehouse 84518ec7d5cSSteven Whitehouse sdp->sd_found_blocks++; 84618ec7d5cSSteven Whitehouse 84718ec7d5cSSteven Whitehouse if (gfs2_revoke_check(sdp, blkno, start)) 84818ec7d5cSSteven Whitehouse continue; 84918ec7d5cSSteven Whitehouse 85018ec7d5cSSteven Whitehouse error = gfs2_replay_read_block(jd, start, &bh_log); 85118ec7d5cSSteven Whitehouse if (error) 85218ec7d5cSSteven Whitehouse return error; 85318ec7d5cSSteven Whitehouse 85418ec7d5cSSteven Whitehouse bh_ip = gfs2_meta_new(gl, blkno); 85518ec7d5cSSteven Whitehouse memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 85618ec7d5cSSteven Whitehouse 85718ec7d5cSSteven Whitehouse /* Unescape */ 85818ec7d5cSSteven Whitehouse if (esc) { 85918ec7d5cSSteven Whitehouse __be32 *eptr = (__be32 *)bh_ip->b_data; 86018ec7d5cSSteven Whitehouse *eptr = cpu_to_be32(GFS2_MAGIC); 86118ec7d5cSSteven Whitehouse } 86218ec7d5cSSteven Whitehouse mark_buffer_dirty(bh_ip); 86318ec7d5cSSteven Whitehouse 86418ec7d5cSSteven Whitehouse brelse(bh_log); 86518ec7d5cSSteven Whitehouse brelse(bh_ip); 86618ec7d5cSSteven Whitehouse 86718ec7d5cSSteven Whitehouse sdp->sd_replayed_blocks++; 86818ec7d5cSSteven Whitehouse } 86918ec7d5cSSteven Whitehouse 87018ec7d5cSSteven Whitehouse return error; 87118ec7d5cSSteven Whitehouse } 87218ec7d5cSSteven Whitehouse 87318ec7d5cSSteven Whitehouse /* FIXME: sort out accounting for log blocks etc. */ 87418ec7d5cSSteven Whitehouse 87518ec7d5cSSteven Whitehouse static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 87618ec7d5cSSteven Whitehouse { 877feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 878feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 87918ec7d5cSSteven Whitehouse 88018ec7d5cSSteven Whitehouse if (error) { 8817276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 88218ec7d5cSSteven Whitehouse return; 88318ec7d5cSSteven Whitehouse } 88418ec7d5cSSteven Whitehouse if (pass != 1) 88518ec7d5cSSteven Whitehouse return; 88618ec7d5cSSteven Whitehouse 88718ec7d5cSSteven Whitehouse /* data sync? */ 8887276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 88918ec7d5cSSteven Whitehouse 89018ec7d5cSSteven Whitehouse fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 89118ec7d5cSSteven Whitehouse jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 89218ec7d5cSSteven Whitehouse } 89318ec7d5cSSteven Whitehouse 89418ec7d5cSSteven Whitehouse static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 89518ec7d5cSSteven Whitehouse { 89618ec7d5cSSteven Whitehouse struct list_head *head = &sdp->sd_log_le_databuf; 89718ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd; 89818ec7d5cSSteven Whitehouse 89918ec7d5cSSteven Whitehouse while (!list_empty(head)) { 90018ec7d5cSSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 901b8e1aabfSSteven Whitehouse list_del_init(&bd->bd_le.le_list); 90218ec7d5cSSteven Whitehouse sdp->sd_log_num_databuf--; 90318ec7d5cSSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 90418ec7d5cSSteven Whitehouse } 90518ec7d5cSSteven Whitehouse gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); 90618ec7d5cSSteven Whitehouse } 90718ec7d5cSSteven Whitehouse 90818ec7d5cSSteven Whitehouse 909b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_buf_lops = { 910b3b94faaSDavid Teigland .lo_add = buf_lo_add, 911b3b94faaSDavid Teigland .lo_before_commit = buf_lo_before_commit, 912b3b94faaSDavid Teigland .lo_after_commit = buf_lo_after_commit, 913b3b94faaSDavid Teigland .lo_before_scan = buf_lo_before_scan, 914b3b94faaSDavid Teigland .lo_scan_elements = buf_lo_scan_elements, 915b3b94faaSDavid Teigland .lo_after_scan = buf_lo_after_scan, 916ea67eedbSSteven Whitehouse .lo_name = "buf", 917b3b94faaSDavid Teigland }; 918b3b94faaSDavid Teigland 919b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_revoke_lops = { 920b3b94faaSDavid Teigland .lo_add = revoke_lo_add, 921b3b94faaSDavid Teigland .lo_before_commit = revoke_lo_before_commit, 922f42ab085SSteven Whitehouse .lo_after_commit = revoke_lo_after_commit, 923b3b94faaSDavid Teigland .lo_before_scan = revoke_lo_before_scan, 924b3b94faaSDavid Teigland .lo_scan_elements = revoke_lo_scan_elements, 925b3b94faaSDavid Teigland .lo_after_scan = revoke_lo_after_scan, 926ea67eedbSSteven Whitehouse .lo_name = "revoke", 927b3b94faaSDavid Teigland }; 928b3b94faaSDavid Teigland 929b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_rg_lops = { 930ea67eedbSSteven Whitehouse .lo_name = "rg", 931b3b94faaSDavid Teigland }; 932b3b94faaSDavid Teigland 933b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_databuf_lops = { 934b3b94faaSDavid Teigland .lo_add = databuf_lo_add, 935b3b94faaSDavid Teigland .lo_before_commit = databuf_lo_before_commit, 93618ec7d5cSSteven Whitehouse .lo_after_commit = databuf_lo_after_commit, 93718ec7d5cSSteven Whitehouse .lo_scan_elements = databuf_lo_scan_elements, 93818ec7d5cSSteven Whitehouse .lo_after_scan = databuf_lo_after_scan, 939ea67eedbSSteven Whitehouse .lo_name = "databuf", 940b3b94faaSDavid Teigland }; 941b3b94faaSDavid Teigland 942b09e593dSSteven Whitehouse const struct gfs2_log_operations *gfs2_log_ops[] = { 943b3b94faaSDavid Teigland &gfs2_databuf_lops, 94416615be1SSteven Whitehouse &gfs2_buf_lops, 94516615be1SSteven Whitehouse &gfs2_rg_lops, 94616615be1SSteven Whitehouse &gfs2_revoke_lops, 947ea67eedbSSteven Whitehouse NULL, 948b3b94faaSDavid Teigland }; 949b3b94faaSDavid Teigland 950