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 { 378144a4c2fSSteven Whitehouse struct page *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); 3995c676f6dSSteven Whitehouse tr = current->journal_info; 400b3b94faaSDavid Teigland tr->tr_touched = 1; 401b3b94faaSDavid Teigland if (!list_empty(&le->le_list)) 4029b9107a5SSteven Whitehouse goto out; 4032bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 4042bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 405b3b94faaSDavid Teigland gfs2_meta_check(sdp, bd->bd_bh); 406a98ab220SSteven Whitehouse gfs2_pin(sdp, bd->bd_bh); 4070ab7d13fSSteven Whitehouse mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; 4080ab7d13fSSteven Whitehouse mh->__pad0 = cpu_to_be64(0); 4090ab7d13fSSteven Whitehouse mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); 410b3b94faaSDavid Teigland sdp->sd_log_num_buf++; 411b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_buf); 412b3b94faaSDavid Teigland tr->tr_num_buf_new++; 4139b9107a5SSteven Whitehouse out: 4149b9107a5SSteven Whitehouse gfs2_log_unlock(sdp); 4159b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 416b3b94faaSDavid Teigland } 417b3b94faaSDavid Teigland 418dad30e90SSteven Whitehouse static void gfs2_check_magic(struct buffer_head *bh) 419dad30e90SSteven Whitehouse { 420dad30e90SSteven Whitehouse void *kaddr; 421dad30e90SSteven Whitehouse __be32 *ptr; 422dad30e90SSteven Whitehouse 423dad30e90SSteven Whitehouse clear_buffer_escaped(bh); 424dad30e90SSteven Whitehouse kaddr = kmap_atomic(bh->b_page); 425dad30e90SSteven Whitehouse ptr = kaddr + bh_offset(bh); 426dad30e90SSteven Whitehouse if (*ptr == cpu_to_be32(GFS2_MAGIC)) 427dad30e90SSteven Whitehouse set_buffer_escaped(bh); 428dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 429dad30e90SSteven Whitehouse } 430dad30e90SSteven Whitehouse 431dad30e90SSteven Whitehouse static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, 432dad30e90SSteven Whitehouse unsigned int total, struct list_head *blist, 433dad30e90SSteven Whitehouse bool is_databuf) 434b3b94faaSDavid Teigland { 435b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 436b3b94faaSDavid Teigland struct gfs2_bufdata *bd1 = NULL, *bd2; 437e8c92ed7SSteven Whitehouse struct page *page; 438b3b94faaSDavid Teigland unsigned int num; 439b3b94faaSDavid Teigland unsigned n; 440b3b94faaSDavid Teigland __be64 *ptr; 441b3b94faaSDavid Teigland 442905d2aefSBob Peterson gfs2_log_lock(sdp); 443dad30e90SSteven Whitehouse bd1 = bd2 = list_prepare_entry(bd1, blist, bd_le.le_list); 444b3b94faaSDavid Teigland while(total) { 445b3b94faaSDavid Teigland num = total; 446b3b94faaSDavid Teigland if (total > limit) 447b3b94faaSDavid Teigland num = limit; 448905d2aefSBob Peterson gfs2_log_unlock(sdp); 449dad30e90SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA, num + 1, num); 450e8c92ed7SSteven Whitehouse ld = page_address(page); 451905d2aefSBob Peterson gfs2_log_lock(sdp); 452e8c92ed7SSteven Whitehouse ptr = (__be64 *)(ld + 1); 453b3b94faaSDavid Teigland 454b3b94faaSDavid Teigland n = 0; 455dad30e90SSteven Whitehouse list_for_each_entry_continue(bd1, blist, bd_le.le_list) { 456b3b94faaSDavid Teigland *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 457dad30e90SSteven Whitehouse if (is_databuf) { 458dad30e90SSteven Whitehouse gfs2_check_magic(bd1->bd_bh); 459dad30e90SSteven Whitehouse *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); 460dad30e90SSteven Whitehouse } 461b3b94faaSDavid Teigland if (++n >= num) 462b3b94faaSDavid Teigland break; 463b3b94faaSDavid Teigland } 464b3b94faaSDavid Teigland 465905d2aefSBob Peterson gfs2_log_unlock(sdp); 466e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 467905d2aefSBob Peterson gfs2_log_lock(sdp); 468b3b94faaSDavid Teigland 469b3b94faaSDavid Teigland n = 0; 470dad30e90SSteven Whitehouse list_for_each_entry_continue(bd2, blist, bd_le.le_list) { 47116615be1SSteven Whitehouse get_bh(bd2->bd_bh); 472905d2aefSBob Peterson gfs2_log_unlock(sdp); 47316615be1SSteven Whitehouse lock_buffer(bd2->bd_bh); 474dad30e90SSteven Whitehouse 475dad30e90SSteven Whitehouse if (buffer_escaped(bd2->bd_bh)) { 476dad30e90SSteven Whitehouse void *kaddr; 477dad30e90SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 478dad30e90SSteven Whitehouse ptr = page_address(page); 479dad30e90SSteven Whitehouse kaddr = kmap_atomic(bd2->bd_bh->b_page); 480dad30e90SSteven Whitehouse memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), 481dad30e90SSteven Whitehouse bd2->bd_bh->b_size); 482dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 483dad30e90SSteven Whitehouse *(__be32 *)ptr = 0; 484dad30e90SSteven Whitehouse clear_buffer_escaped(bd2->bd_bh); 485dad30e90SSteven Whitehouse unlock_buffer(bd2->bd_bh); 486dad30e90SSteven Whitehouse brelse(bd2->bd_bh); 487dad30e90SSteven Whitehouse gfs2_log_write_page(sdp, page); 488dad30e90SSteven Whitehouse } else { 489e8c92ed7SSteven Whitehouse gfs2_log_write_bh(sdp, bd2->bd_bh); 490dad30e90SSteven Whitehouse } 491905d2aefSBob Peterson gfs2_log_lock(sdp); 492b3b94faaSDavid Teigland if (++n >= num) 493b3b94faaSDavid Teigland break; 494b3b94faaSDavid Teigland } 495b3b94faaSDavid Teigland 496905d2aefSBob Peterson BUG_ON(total < num); 497b3b94faaSDavid Teigland total -= num; 498b3b94faaSDavid Teigland } 499905d2aefSBob Peterson gfs2_log_unlock(sdp); 500b3b94faaSDavid Teigland } 501b3b94faaSDavid Teigland 502dad30e90SSteven Whitehouse static void buf_lo_before_commit(struct gfs2_sbd *sdp) 503dad30e90SSteven Whitehouse { 504dad30e90SSteven Whitehouse unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ 505dad30e90SSteven Whitehouse 506dad30e90SSteven Whitehouse gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf, 507dad30e90SSteven Whitehouse &sdp->sd_log_le_buf, 0); 508dad30e90SSteven Whitehouse } 509dad30e90SSteven Whitehouse 510b3b94faaSDavid Teigland static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 511b3b94faaSDavid Teigland { 512b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_buf; 513b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 514b3b94faaSDavid Teigland 515b3b94faaSDavid Teigland while (!list_empty(head)) { 516b3b94faaSDavid Teigland bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 517b3b94faaSDavid Teigland list_del_init(&bd->bd_le.le_list); 518b3b94faaSDavid Teigland sdp->sd_log_num_buf--; 519b3b94faaSDavid Teigland 520a98ab220SSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 521b3b94faaSDavid Teigland } 522b3b94faaSDavid Teigland gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); 523b3b94faaSDavid Teigland } 524b3b94faaSDavid Teigland 525b3b94faaSDavid Teigland static void buf_lo_before_scan(struct gfs2_jdesc *jd, 52655167622SAl Viro struct gfs2_log_header_host *head, int pass) 527b3b94faaSDavid Teigland { 528feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 529b3b94faaSDavid Teigland 530b3b94faaSDavid Teigland if (pass != 0) 531b3b94faaSDavid Teigland return; 532b3b94faaSDavid Teigland 533b3b94faaSDavid Teigland sdp->sd_found_blocks = 0; 534b3b94faaSDavid Teigland sdp->sd_replayed_blocks = 0; 535b3b94faaSDavid Teigland } 536b3b94faaSDavid Teigland 537b3b94faaSDavid Teigland static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 538b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 539b3b94faaSDavid Teigland int pass) 540b3b94faaSDavid Teigland { 541feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 542feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 5435c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 544b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_data1); 545b3b94faaSDavid Teigland struct buffer_head *bh_log, *bh_ip; 546cd915493SSteven Whitehouse u64 blkno; 547b3b94faaSDavid Teigland int error = 0; 548b3b94faaSDavid Teigland 549b3b94faaSDavid Teigland if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 550b3b94faaSDavid Teigland return 0; 551b3b94faaSDavid Teigland 552b3b94faaSDavid Teigland gfs2_replay_incr_blk(sdp, &start); 553b3b94faaSDavid Teigland 554b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 555b3b94faaSDavid Teigland blkno = be64_to_cpu(*ptr++); 556b3b94faaSDavid Teigland 557b3b94faaSDavid Teigland sdp->sd_found_blocks++; 558b3b94faaSDavid Teigland 559b3b94faaSDavid Teigland if (gfs2_revoke_check(sdp, blkno, start)) 560b3b94faaSDavid Teigland continue; 561b3b94faaSDavid Teigland 562b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh_log); 563b3b94faaSDavid Teigland if (error) 564b3b94faaSDavid Teigland return error; 565b3b94faaSDavid Teigland 566b3b94faaSDavid Teigland bh_ip = gfs2_meta_new(gl, blkno); 567b3b94faaSDavid Teigland memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 568b3b94faaSDavid Teigland 569b3b94faaSDavid Teigland if (gfs2_meta_check(sdp, bh_ip)) 570b3b94faaSDavid Teigland error = -EIO; 571b3b94faaSDavid Teigland else 572b3b94faaSDavid Teigland mark_buffer_dirty(bh_ip); 573b3b94faaSDavid Teigland 574b3b94faaSDavid Teigland brelse(bh_log); 575b3b94faaSDavid Teigland brelse(bh_ip); 576b3b94faaSDavid Teigland 577b3b94faaSDavid Teigland if (error) 578b3b94faaSDavid Teigland break; 579b3b94faaSDavid Teigland 580b3b94faaSDavid Teigland sdp->sd_replayed_blocks++; 581b3b94faaSDavid Teigland } 582b3b94faaSDavid Teigland 583b3b94faaSDavid Teigland return error; 584b3b94faaSDavid Teigland } 585b3b94faaSDavid Teigland 586b3b94faaSDavid Teigland static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 587b3b94faaSDavid Teigland { 588feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 589feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 590b3b94faaSDavid Teigland 591b3b94faaSDavid Teigland if (error) { 5927276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 593b3b94faaSDavid Teigland return; 594b3b94faaSDavid Teigland } 595b3b94faaSDavid Teigland if (pass != 1) 596b3b94faaSDavid Teigland return; 597b3b94faaSDavid Teigland 5987276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 599b3b94faaSDavid Teigland 600b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 601b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 602b3b94faaSDavid Teigland } 603b3b94faaSDavid Teigland 604b3b94faaSDavid Teigland static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 605b3b94faaSDavid Teigland { 606f42ab085SSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 607f42ab085SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 608b3b94faaSDavid Teigland struct gfs2_trans *tr; 609b3b94faaSDavid Teigland 6105c676f6dSSteven Whitehouse tr = current->journal_info; 611b3b94faaSDavid Teigland tr->tr_touched = 1; 612b3b94faaSDavid Teigland tr->tr_num_revoke++; 613b3b94faaSDavid Teigland sdp->sd_log_num_revoke++; 614f42ab085SSteven Whitehouse atomic_inc(&gl->gl_revokes); 615f42ab085SSteven Whitehouse set_bit(GLF_LFLUSH, &gl->gl_flags); 616b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_revoke); 617b3b94faaSDavid Teigland } 618b3b94faaSDavid Teigland 619b3b94faaSDavid Teigland static void revoke_lo_before_commit(struct gfs2_sbd *sdp) 620b3b94faaSDavid Teigland { 621b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 622b3b94faaSDavid Teigland struct gfs2_meta_header *mh; 623b3b94faaSDavid Teigland unsigned int offset; 624b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_revoke; 62582e86087SSteven Whitehouse struct gfs2_bufdata *bd; 626e8c92ed7SSteven Whitehouse struct page *page; 627dad30e90SSteven Whitehouse unsigned int length; 628b3b94faaSDavid Teigland 629b3b94faaSDavid Teigland if (!sdp->sd_log_num_revoke) 630b3b94faaSDavid Teigland return; 631b3b94faaSDavid Teigland 632dad30e90SSteven Whitehouse length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); 633dad30e90SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); 634e8c92ed7SSteven Whitehouse ld = page_address(page); 635b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 636b3b94faaSDavid Teigland 637f42ab085SSteven Whitehouse list_for_each_entry(bd, head, bd_le.le_list) { 638b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 639b3b94faaSDavid Teigland 640cd915493SSteven Whitehouse if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 641b3b94faaSDavid Teigland 642e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 643e8c92ed7SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 644e8c92ed7SSteven Whitehouse mh = page_address(page); 645e8c92ed7SSteven Whitehouse clear_page(mh); 646b3b94faaSDavid Teigland mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 647e3167dedSSteven Whitehouse mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 648e3167dedSSteven Whitehouse mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 649b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 650b3b94faaSDavid Teigland } 651b3b94faaSDavid Teigland 652e8c92ed7SSteven Whitehouse *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 653cd915493SSteven Whitehouse offset += sizeof(u64); 654b3b94faaSDavid Teigland } 655b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 656b3b94faaSDavid Teigland 657e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 658b3b94faaSDavid Teigland } 659b3b94faaSDavid Teigland 660f42ab085SSteven Whitehouse static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 661f42ab085SSteven Whitehouse { 662f42ab085SSteven Whitehouse struct list_head *head = &sdp->sd_log_le_revoke; 663f42ab085SSteven Whitehouse struct gfs2_bufdata *bd; 664f42ab085SSteven Whitehouse struct gfs2_glock *gl; 665f42ab085SSteven Whitehouse 666f42ab085SSteven Whitehouse while (!list_empty(head)) { 667f42ab085SSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 668f42ab085SSteven Whitehouse list_del_init(&bd->bd_le.le_list); 669f42ab085SSteven Whitehouse gl = bd->bd_gl; 670f42ab085SSteven Whitehouse atomic_dec(&gl->gl_revokes); 671f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 672f42ab085SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 673f42ab085SSteven Whitehouse } 674f42ab085SSteven Whitehouse } 675f42ab085SSteven Whitehouse 676b3b94faaSDavid Teigland static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 67755167622SAl Viro struct gfs2_log_header_host *head, int pass) 678b3b94faaSDavid Teigland { 679feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 680b3b94faaSDavid Teigland 681b3b94faaSDavid Teigland if (pass != 0) 682b3b94faaSDavid Teigland return; 683b3b94faaSDavid Teigland 684b3b94faaSDavid Teigland sdp->sd_found_revokes = 0; 685b3b94faaSDavid Teigland sdp->sd_replay_tail = head->lh_tail; 686b3b94faaSDavid Teigland } 687b3b94faaSDavid Teigland 688b3b94faaSDavid Teigland static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 689b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 690b3b94faaSDavid Teigland int pass) 691b3b94faaSDavid Teigland { 692feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 693b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_length); 694b3b94faaSDavid Teigland unsigned int revokes = be32_to_cpu(ld->ld_data1); 695b3b94faaSDavid Teigland struct buffer_head *bh; 696b3b94faaSDavid Teigland unsigned int offset; 697cd915493SSteven Whitehouse u64 blkno; 698b3b94faaSDavid Teigland int first = 1; 699b3b94faaSDavid Teigland int error; 700b3b94faaSDavid Teigland 701b3b94faaSDavid Teigland if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 702b3b94faaSDavid Teigland return 0; 703b3b94faaSDavid Teigland 704b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 705b3b94faaSDavid Teigland 706b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 707b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh); 708b3b94faaSDavid Teigland if (error) 709b3b94faaSDavid Teigland return error; 710b3b94faaSDavid Teigland 711b3b94faaSDavid Teigland if (!first) 712b3b94faaSDavid Teigland gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 713b3b94faaSDavid Teigland 714cd915493SSteven Whitehouse while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 715b3b94faaSDavid Teigland blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 716b3b94faaSDavid Teigland 717b3b94faaSDavid Teigland error = gfs2_revoke_add(sdp, blkno, start); 7183ad62e87SBob Peterson if (error < 0) { 7193ad62e87SBob Peterson brelse(bh); 720b3b94faaSDavid Teigland return error; 7213ad62e87SBob Peterson } 722b3b94faaSDavid Teigland else if (error) 723b3b94faaSDavid Teigland sdp->sd_found_revokes++; 724b3b94faaSDavid Teigland 725b3b94faaSDavid Teigland if (!--revokes) 726b3b94faaSDavid Teigland break; 727cd915493SSteven Whitehouse offset += sizeof(u64); 728b3b94faaSDavid Teigland } 729b3b94faaSDavid Teigland 730b3b94faaSDavid Teigland brelse(bh); 731b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 732b3b94faaSDavid Teigland first = 0; 733b3b94faaSDavid Teigland } 734b3b94faaSDavid Teigland 735b3b94faaSDavid Teigland return 0; 736b3b94faaSDavid Teigland } 737b3b94faaSDavid Teigland 738b3b94faaSDavid Teigland static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 739b3b94faaSDavid Teigland { 740feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 741b3b94faaSDavid Teigland 742b3b94faaSDavid Teigland if (error) { 743b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 744b3b94faaSDavid Teigland return; 745b3b94faaSDavid Teigland } 746b3b94faaSDavid Teigland if (pass != 1) 747b3b94faaSDavid Teigland return; 748b3b94faaSDavid Teigland 749b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Found %u revoke tags\n", 750b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_found_revokes); 751b3b94faaSDavid Teigland 752b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 753b3b94faaSDavid Teigland } 754b3b94faaSDavid Teigland 75518ec7d5cSSteven Whitehouse /** 75618ec7d5cSSteven Whitehouse * databuf_lo_add - Add a databuf to the transaction. 75718ec7d5cSSteven Whitehouse * 75818ec7d5cSSteven Whitehouse * This is used in two distinct cases: 75918ec7d5cSSteven Whitehouse * i) In ordered write mode 76018ec7d5cSSteven Whitehouse * We put the data buffer on a list so that we can ensure that its 76118ec7d5cSSteven Whitehouse * synced to disk at the right time 76218ec7d5cSSteven Whitehouse * ii) In journaled data mode 76318ec7d5cSSteven Whitehouse * We need to journal the data block in the same way as metadata in 76418ec7d5cSSteven Whitehouse * the functions above. The difference is that here we have a tag 76518ec7d5cSSteven Whitehouse * which is two __be64's being the block number (as per meta data) 76618ec7d5cSSteven Whitehouse * and a flag which says whether the data block needs escaping or 76718ec7d5cSSteven Whitehouse * not. This means we need a new log entry for each 251 or so data 76818ec7d5cSSteven Whitehouse * blocks, which isn't an enormous overhead but twice as much as 76918ec7d5cSSteven Whitehouse * for normal metadata blocks. 77018ec7d5cSSteven Whitehouse */ 771b3b94faaSDavid Teigland static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 772b3b94faaSDavid Teigland { 77318ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 7745c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 77518ec7d5cSSteven Whitehouse struct address_space *mapping = bd->bd_bh->b_page->mapping; 776feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 777b3b94faaSDavid Teigland 7789b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 7798bd95727SSteven Whitehouse gfs2_log_lock(sdp); 780c50b91c4SSteven Whitehouse if (tr) 78118ec7d5cSSteven Whitehouse tr->tr_touched = 1; 782ddf4b426SBenjamin Marzinski if (!list_empty(&le->le_list)) 7839b9107a5SSteven Whitehouse goto out; 7842bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 7852bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 7862332c443SRobert Peterson if (gfs2_is_jdata(ip)) { 7872332c443SRobert Peterson gfs2_pin(sdp, bd->bd_bh); 7882332c443SRobert Peterson tr->tr_num_databuf_new++; 789bdcb8856SBob Peterson sdp->sd_log_num_databuf++; 790e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_databuf); 791d7b616e2SSteven Whitehouse } else { 792e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_ordered); 793d7b616e2SSteven Whitehouse } 7949b9107a5SSteven Whitehouse out: 795b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 7969b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 797b3b94faaSDavid Teigland } 798b3b94faaSDavid Teigland 79918ec7d5cSSteven Whitehouse /** 80018ec7d5cSSteven Whitehouse * databuf_lo_before_commit - Scan the data buffers, writing as we go 80118ec7d5cSSteven Whitehouse * 80218ec7d5cSSteven Whitehouse */ 803d7b616e2SSteven Whitehouse 804b3b94faaSDavid Teigland static void databuf_lo_before_commit(struct gfs2_sbd *sdp) 805b3b94faaSDavid Teigland { 806dad30e90SSteven Whitehouse unsigned int limit = buf_limit(sdp) / 2; 807b3b94faaSDavid Teigland 808dad30e90SSteven Whitehouse gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf, 809dad30e90SSteven Whitehouse &sdp->sd_log_le_databuf, 1); 810b3b94faaSDavid Teigland } 811b3b94faaSDavid Teigland 81218ec7d5cSSteven Whitehouse static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 81318ec7d5cSSteven Whitehouse struct gfs2_log_descriptor *ld, 81418ec7d5cSSteven Whitehouse __be64 *ptr, int pass) 81518ec7d5cSSteven Whitehouse { 816feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 817feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 8185c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 81918ec7d5cSSteven Whitehouse unsigned int blks = be32_to_cpu(ld->ld_data1); 82018ec7d5cSSteven Whitehouse struct buffer_head *bh_log, *bh_ip; 821cd915493SSteven Whitehouse u64 blkno; 822cd915493SSteven Whitehouse u64 esc; 82318ec7d5cSSteven Whitehouse int error = 0; 82418ec7d5cSSteven Whitehouse 82518ec7d5cSSteven Whitehouse if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 82618ec7d5cSSteven Whitehouse return 0; 82718ec7d5cSSteven Whitehouse 82818ec7d5cSSteven Whitehouse gfs2_replay_incr_blk(sdp, &start); 82918ec7d5cSSteven Whitehouse for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 83018ec7d5cSSteven Whitehouse blkno = be64_to_cpu(*ptr++); 83118ec7d5cSSteven Whitehouse esc = be64_to_cpu(*ptr++); 83218ec7d5cSSteven Whitehouse 83318ec7d5cSSteven Whitehouse sdp->sd_found_blocks++; 83418ec7d5cSSteven Whitehouse 83518ec7d5cSSteven Whitehouse if (gfs2_revoke_check(sdp, blkno, start)) 83618ec7d5cSSteven Whitehouse continue; 83718ec7d5cSSteven Whitehouse 83818ec7d5cSSteven Whitehouse error = gfs2_replay_read_block(jd, start, &bh_log); 83918ec7d5cSSteven Whitehouse if (error) 84018ec7d5cSSteven Whitehouse return error; 84118ec7d5cSSteven Whitehouse 84218ec7d5cSSteven Whitehouse bh_ip = gfs2_meta_new(gl, blkno); 84318ec7d5cSSteven Whitehouse memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 84418ec7d5cSSteven Whitehouse 84518ec7d5cSSteven Whitehouse /* Unescape */ 84618ec7d5cSSteven Whitehouse if (esc) { 84718ec7d5cSSteven Whitehouse __be32 *eptr = (__be32 *)bh_ip->b_data; 84818ec7d5cSSteven Whitehouse *eptr = cpu_to_be32(GFS2_MAGIC); 84918ec7d5cSSteven Whitehouse } 85018ec7d5cSSteven Whitehouse mark_buffer_dirty(bh_ip); 85118ec7d5cSSteven Whitehouse 85218ec7d5cSSteven Whitehouse brelse(bh_log); 85318ec7d5cSSteven Whitehouse brelse(bh_ip); 85418ec7d5cSSteven Whitehouse 85518ec7d5cSSteven Whitehouse sdp->sd_replayed_blocks++; 85618ec7d5cSSteven Whitehouse } 85718ec7d5cSSteven Whitehouse 85818ec7d5cSSteven Whitehouse return error; 85918ec7d5cSSteven Whitehouse } 86018ec7d5cSSteven Whitehouse 86118ec7d5cSSteven Whitehouse /* FIXME: sort out accounting for log blocks etc. */ 86218ec7d5cSSteven Whitehouse 86318ec7d5cSSteven Whitehouse static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 86418ec7d5cSSteven Whitehouse { 865feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 866feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 86718ec7d5cSSteven Whitehouse 86818ec7d5cSSteven Whitehouse if (error) { 8697276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 87018ec7d5cSSteven Whitehouse return; 87118ec7d5cSSteven Whitehouse } 87218ec7d5cSSteven Whitehouse if (pass != 1) 87318ec7d5cSSteven Whitehouse return; 87418ec7d5cSSteven Whitehouse 87518ec7d5cSSteven Whitehouse /* data sync? */ 8767276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 87718ec7d5cSSteven Whitehouse 87818ec7d5cSSteven Whitehouse fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 87918ec7d5cSSteven Whitehouse jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 88018ec7d5cSSteven Whitehouse } 88118ec7d5cSSteven Whitehouse 88218ec7d5cSSteven Whitehouse static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 88318ec7d5cSSteven Whitehouse { 88418ec7d5cSSteven Whitehouse struct list_head *head = &sdp->sd_log_le_databuf; 88518ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd; 88618ec7d5cSSteven Whitehouse 88718ec7d5cSSteven Whitehouse while (!list_empty(head)) { 88818ec7d5cSSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 889b8e1aabfSSteven Whitehouse list_del_init(&bd->bd_le.le_list); 89018ec7d5cSSteven Whitehouse sdp->sd_log_num_databuf--; 89118ec7d5cSSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 89218ec7d5cSSteven Whitehouse } 89318ec7d5cSSteven Whitehouse gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); 89418ec7d5cSSteven Whitehouse } 89518ec7d5cSSteven Whitehouse 89618ec7d5cSSteven Whitehouse 897b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_buf_lops = { 898b3b94faaSDavid Teigland .lo_add = buf_lo_add, 899b3b94faaSDavid Teigland .lo_before_commit = buf_lo_before_commit, 900b3b94faaSDavid Teigland .lo_after_commit = buf_lo_after_commit, 901b3b94faaSDavid Teigland .lo_before_scan = buf_lo_before_scan, 902b3b94faaSDavid Teigland .lo_scan_elements = buf_lo_scan_elements, 903b3b94faaSDavid Teigland .lo_after_scan = buf_lo_after_scan, 904ea67eedbSSteven Whitehouse .lo_name = "buf", 905b3b94faaSDavid Teigland }; 906b3b94faaSDavid Teigland 907b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_revoke_lops = { 908b3b94faaSDavid Teigland .lo_add = revoke_lo_add, 909b3b94faaSDavid Teigland .lo_before_commit = revoke_lo_before_commit, 910f42ab085SSteven Whitehouse .lo_after_commit = revoke_lo_after_commit, 911b3b94faaSDavid Teigland .lo_before_scan = revoke_lo_before_scan, 912b3b94faaSDavid Teigland .lo_scan_elements = revoke_lo_scan_elements, 913b3b94faaSDavid Teigland .lo_after_scan = revoke_lo_after_scan, 914ea67eedbSSteven Whitehouse .lo_name = "revoke", 915b3b94faaSDavid Teigland }; 916b3b94faaSDavid Teigland 917b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_rg_lops = { 918ea67eedbSSteven Whitehouse .lo_name = "rg", 919b3b94faaSDavid Teigland }; 920b3b94faaSDavid Teigland 921b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_databuf_lops = { 922b3b94faaSDavid Teigland .lo_add = databuf_lo_add, 923b3b94faaSDavid Teigland .lo_before_commit = databuf_lo_before_commit, 92418ec7d5cSSteven Whitehouse .lo_after_commit = databuf_lo_after_commit, 92518ec7d5cSSteven Whitehouse .lo_scan_elements = databuf_lo_scan_elements, 92618ec7d5cSSteven Whitehouse .lo_after_scan = databuf_lo_after_scan, 927ea67eedbSSteven Whitehouse .lo_name = "databuf", 928b3b94faaSDavid Teigland }; 929b3b94faaSDavid Teigland 930b09e593dSSteven Whitehouse const struct gfs2_log_operations *gfs2_log_ops[] = { 931b3b94faaSDavid Teigland &gfs2_databuf_lops, 93216615be1SSteven Whitehouse &gfs2_buf_lops, 93316615be1SSteven Whitehouse &gfs2_rg_lops, 93416615be1SSteven Whitehouse &gfs2_revoke_lops, 935ea67eedbSSteven Whitehouse NULL, 936b3b94faaSDavid Teigland }; 937b3b94faaSDavid Teigland 938