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 375e8c92ed7SSteven Whitehouse static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) 376e8c92ed7SSteven Whitehouse { 377e8c92ed7SSteven Whitehouse void *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 378e8c92ed7SSteven Whitehouse struct gfs2_log_descriptor *ld = page_address(page); 379e8c92ed7SSteven Whitehouse clear_page(ld); 38016615be1SSteven Whitehouse ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 38116615be1SSteven Whitehouse ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 38216615be1SSteven Whitehouse ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 38316615be1SSteven Whitehouse ld->ld_type = cpu_to_be32(ld_type); 38416615be1SSteven Whitehouse ld->ld_length = 0; 38516615be1SSteven Whitehouse ld->ld_data1 = 0; 38616615be1SSteven Whitehouse ld->ld_data2 = 0; 387e8c92ed7SSteven Whitehouse return page; 38816615be1SSteven Whitehouse } 38916615be1SSteven Whitehouse 390b3b94faaSDavid Teigland static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 391b3b94faaSDavid Teigland { 392b3b94faaSDavid Teigland struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 3930ab7d13fSSteven Whitehouse struct gfs2_meta_header *mh; 394b3b94faaSDavid Teigland struct gfs2_trans *tr; 395b3b94faaSDavid Teigland 3969b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 3978bd95727SSteven Whitehouse gfs2_log_lock(sdp); 3989b9107a5SSteven Whitehouse if (!list_empty(&bd->bd_list_tr)) 3999b9107a5SSteven Whitehouse goto out; 4005c676f6dSSteven Whitehouse tr = current->journal_info; 401b3b94faaSDavid Teigland tr->tr_touched = 1; 402b3b94faaSDavid Teigland tr->tr_num_buf++; 403b3b94faaSDavid Teigland list_add(&bd->bd_list_tr, &tr->tr_list_buf); 404b3b94faaSDavid Teigland if (!list_empty(&le->le_list)) 4059b9107a5SSteven Whitehouse goto out; 4062bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 4072bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 408b3b94faaSDavid Teigland gfs2_meta_check(sdp, bd->bd_bh); 409a98ab220SSteven Whitehouse gfs2_pin(sdp, bd->bd_bh); 4100ab7d13fSSteven Whitehouse mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; 4110ab7d13fSSteven Whitehouse mh->__pad0 = cpu_to_be64(0); 4120ab7d13fSSteven Whitehouse mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); 413b3b94faaSDavid Teigland sdp->sd_log_num_buf++; 414b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_buf); 415b3b94faaSDavid Teigland tr->tr_num_buf_new++; 4169b9107a5SSteven Whitehouse out: 4179b9107a5SSteven Whitehouse gfs2_log_unlock(sdp); 4189b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 419b3b94faaSDavid Teigland } 420b3b94faaSDavid Teigland 421b3b94faaSDavid Teigland static void buf_lo_before_commit(struct gfs2_sbd *sdp) 422b3b94faaSDavid Teigland { 423b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 424b3b94faaSDavid Teigland struct gfs2_bufdata *bd1 = NULL, *bd2; 425e8c92ed7SSteven Whitehouse struct page *page; 426905d2aefSBob Peterson unsigned int total; 427b3b94faaSDavid Teigland unsigned int limit; 428b3b94faaSDavid Teigland unsigned int num; 429b3b94faaSDavid Teigland unsigned n; 430b3b94faaSDavid Teigland __be64 *ptr; 431b3b94faaSDavid Teigland 4322332c443SRobert Peterson limit = buf_limit(sdp); 433b3b94faaSDavid Teigland /* for 4k blocks, limit = 503 */ 434b3b94faaSDavid Teigland 435905d2aefSBob Peterson gfs2_log_lock(sdp); 436905d2aefSBob Peterson total = sdp->sd_log_num_buf; 437b3b94faaSDavid Teigland bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); 438b3b94faaSDavid Teigland while(total) { 439b3b94faaSDavid Teigland num = total; 440b3b94faaSDavid Teigland if (total > limit) 441b3b94faaSDavid Teigland num = limit; 442905d2aefSBob Peterson gfs2_log_unlock(sdp); 443e8c92ed7SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA); 444e8c92ed7SSteven Whitehouse ld = page_address(page); 445905d2aefSBob Peterson gfs2_log_lock(sdp); 446e8c92ed7SSteven Whitehouse ptr = (__be64 *)(ld + 1); 447b3b94faaSDavid Teigland ld->ld_length = cpu_to_be32(num + 1); 448b3b94faaSDavid Teigland ld->ld_data1 = cpu_to_be32(num); 449b3b94faaSDavid Teigland 450b3b94faaSDavid Teigland n = 0; 451568f4c96SSteven Whitehouse list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, 452568f4c96SSteven Whitehouse bd_le.le_list) { 453b3b94faaSDavid Teigland *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 454b3b94faaSDavid Teigland if (++n >= num) 455b3b94faaSDavid Teigland break; 456b3b94faaSDavid Teigland } 457b3b94faaSDavid Teigland 458905d2aefSBob Peterson gfs2_log_unlock(sdp); 459e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 460905d2aefSBob Peterson gfs2_log_lock(sdp); 461b3b94faaSDavid Teigland 462b3b94faaSDavid Teigland n = 0; 463568f4c96SSteven Whitehouse list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, 464568f4c96SSteven Whitehouse bd_le.le_list) { 46516615be1SSteven Whitehouse get_bh(bd2->bd_bh); 466905d2aefSBob Peterson gfs2_log_unlock(sdp); 46716615be1SSteven Whitehouse lock_buffer(bd2->bd_bh); 468e8c92ed7SSteven Whitehouse gfs2_log_write_bh(sdp, bd2->bd_bh); 469905d2aefSBob Peterson gfs2_log_lock(sdp); 470b3b94faaSDavid Teigland if (++n >= num) 471b3b94faaSDavid Teigland break; 472b3b94faaSDavid Teigland } 473b3b94faaSDavid Teigland 474905d2aefSBob Peterson BUG_ON(total < num); 475b3b94faaSDavid Teigland total -= num; 476b3b94faaSDavid Teigland } 477905d2aefSBob Peterson gfs2_log_unlock(sdp); 478b3b94faaSDavid Teigland } 479b3b94faaSDavid Teigland 480b3b94faaSDavid Teigland static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 481b3b94faaSDavid Teigland { 482b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_buf; 483b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 484b3b94faaSDavid Teigland 485b3b94faaSDavid Teigland while (!list_empty(head)) { 486b3b94faaSDavid Teigland bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 487b3b94faaSDavid Teigland list_del_init(&bd->bd_le.le_list); 488b3b94faaSDavid Teigland sdp->sd_log_num_buf--; 489b3b94faaSDavid Teigland 490a98ab220SSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 491b3b94faaSDavid Teigland } 492b3b94faaSDavid Teigland gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); 493b3b94faaSDavid Teigland } 494b3b94faaSDavid Teigland 495b3b94faaSDavid Teigland static void buf_lo_before_scan(struct gfs2_jdesc *jd, 49655167622SAl Viro struct gfs2_log_header_host *head, int pass) 497b3b94faaSDavid Teigland { 498feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 499b3b94faaSDavid Teigland 500b3b94faaSDavid Teigland if (pass != 0) 501b3b94faaSDavid Teigland return; 502b3b94faaSDavid Teigland 503b3b94faaSDavid Teigland sdp->sd_found_blocks = 0; 504b3b94faaSDavid Teigland sdp->sd_replayed_blocks = 0; 505b3b94faaSDavid Teigland } 506b3b94faaSDavid Teigland 507b3b94faaSDavid Teigland static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 508b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 509b3b94faaSDavid Teigland int pass) 510b3b94faaSDavid Teigland { 511feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 512feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 5135c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 514b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_data1); 515b3b94faaSDavid Teigland struct buffer_head *bh_log, *bh_ip; 516cd915493SSteven Whitehouse u64 blkno; 517b3b94faaSDavid Teigland int error = 0; 518b3b94faaSDavid Teigland 519b3b94faaSDavid Teigland if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 520b3b94faaSDavid Teigland return 0; 521b3b94faaSDavid Teigland 522b3b94faaSDavid Teigland gfs2_replay_incr_blk(sdp, &start); 523b3b94faaSDavid Teigland 524b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 525b3b94faaSDavid Teigland blkno = be64_to_cpu(*ptr++); 526b3b94faaSDavid Teigland 527b3b94faaSDavid Teigland sdp->sd_found_blocks++; 528b3b94faaSDavid Teigland 529b3b94faaSDavid Teigland if (gfs2_revoke_check(sdp, blkno, start)) 530b3b94faaSDavid Teigland continue; 531b3b94faaSDavid Teigland 532b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh_log); 533b3b94faaSDavid Teigland if (error) 534b3b94faaSDavid Teigland return error; 535b3b94faaSDavid Teigland 536b3b94faaSDavid Teigland bh_ip = gfs2_meta_new(gl, blkno); 537b3b94faaSDavid Teigland memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 538b3b94faaSDavid Teigland 539b3b94faaSDavid Teigland if (gfs2_meta_check(sdp, bh_ip)) 540b3b94faaSDavid Teigland error = -EIO; 541b3b94faaSDavid Teigland else 542b3b94faaSDavid Teigland mark_buffer_dirty(bh_ip); 543b3b94faaSDavid Teigland 544b3b94faaSDavid Teigland brelse(bh_log); 545b3b94faaSDavid Teigland brelse(bh_ip); 546b3b94faaSDavid Teigland 547b3b94faaSDavid Teigland if (error) 548b3b94faaSDavid Teigland break; 549b3b94faaSDavid Teigland 550b3b94faaSDavid Teigland sdp->sd_replayed_blocks++; 551b3b94faaSDavid Teigland } 552b3b94faaSDavid Teigland 553b3b94faaSDavid Teigland return error; 554b3b94faaSDavid Teigland } 555b3b94faaSDavid Teigland 556b3b94faaSDavid Teigland static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 557b3b94faaSDavid Teigland { 558feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 559feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 560b3b94faaSDavid Teigland 561b3b94faaSDavid Teigland if (error) { 5627276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 563b3b94faaSDavid Teigland return; 564b3b94faaSDavid Teigland } 565b3b94faaSDavid Teigland if (pass != 1) 566b3b94faaSDavid Teigland return; 567b3b94faaSDavid Teigland 5687276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 569b3b94faaSDavid Teigland 570b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 571b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 572b3b94faaSDavid Teigland } 573b3b94faaSDavid Teigland 574b3b94faaSDavid Teigland static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 575b3b94faaSDavid Teigland { 576f42ab085SSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 577f42ab085SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 578b3b94faaSDavid Teigland struct gfs2_trans *tr; 579b3b94faaSDavid Teigland 5805c676f6dSSteven Whitehouse tr = current->journal_info; 581b3b94faaSDavid Teigland tr->tr_touched = 1; 582b3b94faaSDavid Teigland tr->tr_num_revoke++; 583b3b94faaSDavid Teigland sdp->sd_log_num_revoke++; 584f42ab085SSteven Whitehouse atomic_inc(&gl->gl_revokes); 585f42ab085SSteven Whitehouse set_bit(GLF_LFLUSH, &gl->gl_flags); 586b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_revoke); 587b3b94faaSDavid Teigland } 588b3b94faaSDavid Teigland 589b3b94faaSDavid Teigland static void revoke_lo_before_commit(struct gfs2_sbd *sdp) 590b3b94faaSDavid Teigland { 591b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 592b3b94faaSDavid Teigland struct gfs2_meta_header *mh; 593b3b94faaSDavid Teigland unsigned int offset; 594b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_revoke; 59582e86087SSteven Whitehouse struct gfs2_bufdata *bd; 596e8c92ed7SSteven Whitehouse struct page *page; 597b3b94faaSDavid Teigland 598b3b94faaSDavid Teigland if (!sdp->sd_log_num_revoke) 599b3b94faaSDavid Teigland return; 600b3b94faaSDavid Teigland 601e8c92ed7SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE); 602e8c92ed7SSteven Whitehouse ld = page_address(page); 603568f4c96SSteven Whitehouse ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, 604cd915493SSteven Whitehouse sizeof(u64))); 605b3b94faaSDavid Teigland ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); 606b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 607b3b94faaSDavid Teigland 608f42ab085SSteven Whitehouse list_for_each_entry(bd, head, bd_le.le_list) { 609b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 610b3b94faaSDavid Teigland 611cd915493SSteven Whitehouse if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 612b3b94faaSDavid Teigland 613e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 614e8c92ed7SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 615e8c92ed7SSteven Whitehouse mh = page_address(page); 616e8c92ed7SSteven Whitehouse clear_page(mh); 617b3b94faaSDavid Teigland mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 618e3167dedSSteven Whitehouse mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 619e3167dedSSteven Whitehouse mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 620b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 621b3b94faaSDavid Teigland } 622b3b94faaSDavid Teigland 623e8c92ed7SSteven Whitehouse *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 624cd915493SSteven Whitehouse offset += sizeof(u64); 625b3b94faaSDavid Teigland } 626b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 627b3b94faaSDavid Teigland 628e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 629b3b94faaSDavid Teigland } 630b3b94faaSDavid Teigland 631f42ab085SSteven Whitehouse static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 632f42ab085SSteven Whitehouse { 633f42ab085SSteven Whitehouse struct list_head *head = &sdp->sd_log_le_revoke; 634f42ab085SSteven Whitehouse struct gfs2_bufdata *bd; 635f42ab085SSteven Whitehouse struct gfs2_glock *gl; 636f42ab085SSteven Whitehouse 637f42ab085SSteven Whitehouse while (!list_empty(head)) { 638f42ab085SSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 639f42ab085SSteven Whitehouse list_del_init(&bd->bd_le.le_list); 640f42ab085SSteven Whitehouse gl = bd->bd_gl; 641f42ab085SSteven Whitehouse atomic_dec(&gl->gl_revokes); 642f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 643f42ab085SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 644f42ab085SSteven Whitehouse } 645f42ab085SSteven Whitehouse } 646f42ab085SSteven Whitehouse 647b3b94faaSDavid Teigland static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 64855167622SAl Viro struct gfs2_log_header_host *head, int pass) 649b3b94faaSDavid Teigland { 650feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 651b3b94faaSDavid Teigland 652b3b94faaSDavid Teigland if (pass != 0) 653b3b94faaSDavid Teigland return; 654b3b94faaSDavid Teigland 655b3b94faaSDavid Teigland sdp->sd_found_revokes = 0; 656b3b94faaSDavid Teigland sdp->sd_replay_tail = head->lh_tail; 657b3b94faaSDavid Teigland } 658b3b94faaSDavid Teigland 659b3b94faaSDavid Teigland static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 660b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 661b3b94faaSDavid Teigland int pass) 662b3b94faaSDavid Teigland { 663feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 664b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_length); 665b3b94faaSDavid Teigland unsigned int revokes = be32_to_cpu(ld->ld_data1); 666b3b94faaSDavid Teigland struct buffer_head *bh; 667b3b94faaSDavid Teigland unsigned int offset; 668cd915493SSteven Whitehouse u64 blkno; 669b3b94faaSDavid Teigland int first = 1; 670b3b94faaSDavid Teigland int error; 671b3b94faaSDavid Teigland 672b3b94faaSDavid Teigland if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 673b3b94faaSDavid Teigland return 0; 674b3b94faaSDavid Teigland 675b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 676b3b94faaSDavid Teigland 677b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 678b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh); 679b3b94faaSDavid Teigland if (error) 680b3b94faaSDavid Teigland return error; 681b3b94faaSDavid Teigland 682b3b94faaSDavid Teigland if (!first) 683b3b94faaSDavid Teigland gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 684b3b94faaSDavid Teigland 685cd915493SSteven Whitehouse while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 686b3b94faaSDavid Teigland blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 687b3b94faaSDavid Teigland 688b3b94faaSDavid Teigland error = gfs2_revoke_add(sdp, blkno, start); 6893ad62e87SBob Peterson if (error < 0) { 6903ad62e87SBob Peterson brelse(bh); 691b3b94faaSDavid Teigland return error; 6923ad62e87SBob Peterson } 693b3b94faaSDavid Teigland else if (error) 694b3b94faaSDavid Teigland sdp->sd_found_revokes++; 695b3b94faaSDavid Teigland 696b3b94faaSDavid Teigland if (!--revokes) 697b3b94faaSDavid Teigland break; 698cd915493SSteven Whitehouse offset += sizeof(u64); 699b3b94faaSDavid Teigland } 700b3b94faaSDavid Teigland 701b3b94faaSDavid Teigland brelse(bh); 702b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 703b3b94faaSDavid Teigland first = 0; 704b3b94faaSDavid Teigland } 705b3b94faaSDavid Teigland 706b3b94faaSDavid Teigland return 0; 707b3b94faaSDavid Teigland } 708b3b94faaSDavid Teigland 709b3b94faaSDavid Teigland static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 710b3b94faaSDavid Teigland { 711feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 712b3b94faaSDavid Teigland 713b3b94faaSDavid Teigland if (error) { 714b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 715b3b94faaSDavid Teigland return; 716b3b94faaSDavid Teigland } 717b3b94faaSDavid Teigland if (pass != 1) 718b3b94faaSDavid Teigland return; 719b3b94faaSDavid Teigland 720b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Found %u revoke tags\n", 721b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_found_revokes); 722b3b94faaSDavid Teigland 723b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 724b3b94faaSDavid Teigland } 725b3b94faaSDavid Teigland 72618ec7d5cSSteven Whitehouse /** 72718ec7d5cSSteven Whitehouse * databuf_lo_add - Add a databuf to the transaction. 72818ec7d5cSSteven Whitehouse * 72918ec7d5cSSteven Whitehouse * This is used in two distinct cases: 73018ec7d5cSSteven Whitehouse * i) In ordered write mode 73118ec7d5cSSteven Whitehouse * We put the data buffer on a list so that we can ensure that its 73218ec7d5cSSteven Whitehouse * synced to disk at the right time 73318ec7d5cSSteven Whitehouse * ii) In journaled data mode 73418ec7d5cSSteven Whitehouse * We need to journal the data block in the same way as metadata in 73518ec7d5cSSteven Whitehouse * the functions above. The difference is that here we have a tag 73618ec7d5cSSteven Whitehouse * which is two __be64's being the block number (as per meta data) 73718ec7d5cSSteven Whitehouse * and a flag which says whether the data block needs escaping or 73818ec7d5cSSteven Whitehouse * not. This means we need a new log entry for each 251 or so data 73918ec7d5cSSteven Whitehouse * blocks, which isn't an enormous overhead but twice as much as 74018ec7d5cSSteven Whitehouse * for normal metadata blocks. 74118ec7d5cSSteven Whitehouse */ 742b3b94faaSDavid Teigland static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 743b3b94faaSDavid Teigland { 74418ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 7455c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 74618ec7d5cSSteven Whitehouse struct address_space *mapping = bd->bd_bh->b_page->mapping; 747feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 748b3b94faaSDavid Teigland 7499b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 7508bd95727SSteven Whitehouse gfs2_log_lock(sdp); 7519ff8ec32SSteven Whitehouse if (tr) { 7529b9107a5SSteven Whitehouse if (!list_empty(&bd->bd_list_tr)) 7539b9107a5SSteven Whitehouse goto out; 75418ec7d5cSSteven Whitehouse tr->tr_touched = 1; 755773ed1a0SRobert Peterson if (gfs2_is_jdata(ip)) { 75618ec7d5cSSteven Whitehouse tr->tr_num_buf++; 75718ec7d5cSSteven Whitehouse list_add(&bd->bd_list_tr, &tr->tr_list_buf); 758773ed1a0SRobert Peterson } 7599ff8ec32SSteven Whitehouse } 760ddf4b426SBenjamin Marzinski if (!list_empty(&le->le_list)) 7619b9107a5SSteven Whitehouse goto out; 7622332c443SRobert Peterson 7632bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 7642bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 7652332c443SRobert Peterson if (gfs2_is_jdata(ip)) { 7662332c443SRobert Peterson gfs2_pin(sdp, bd->bd_bh); 7672332c443SRobert Peterson tr->tr_num_databuf_new++; 768bdcb8856SBob Peterson sdp->sd_log_num_databuf++; 769e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_databuf); 770d7b616e2SSteven Whitehouse } else { 771e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_ordered); 772d7b616e2SSteven Whitehouse } 7739b9107a5SSteven Whitehouse out: 774b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 7759b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 776b3b94faaSDavid Teigland } 777b3b94faaSDavid Teigland 77816615be1SSteven Whitehouse static void gfs2_check_magic(struct buffer_head *bh) 77918ec7d5cSSteven Whitehouse { 78018ec7d5cSSteven Whitehouse void *kaddr; 78118ec7d5cSSteven Whitehouse __be32 *ptr; 78218ec7d5cSSteven Whitehouse 78316615be1SSteven Whitehouse clear_buffer_escaped(bh); 784d9349285SCong Wang kaddr = kmap_atomic(bh->b_page); 78518ec7d5cSSteven Whitehouse ptr = kaddr + bh_offset(bh); 78618ec7d5cSSteven Whitehouse if (*ptr == cpu_to_be32(GFS2_MAGIC)) 78716615be1SSteven Whitehouse set_buffer_escaped(bh); 788d9349285SCong Wang kunmap_atomic(kaddr); 78916615be1SSteven Whitehouse } 79018ec7d5cSSteven Whitehouse 791e8c92ed7SSteven Whitehouse static void gfs2_write_blocks(struct gfs2_sbd *sdp, 792e8c92ed7SSteven Whitehouse struct gfs2_log_descriptor *ld, 793e8c92ed7SSteven Whitehouse struct page *page, 79416615be1SSteven Whitehouse struct list_head *list, struct list_head *done, 79516615be1SSteven Whitehouse unsigned int n) 79616615be1SSteven Whitehouse { 79716615be1SSteven Whitehouse struct gfs2_bufdata *bd; 79816615be1SSteven Whitehouse __be64 *ptr; 79916615be1SSteven Whitehouse 800e8c92ed7SSteven Whitehouse if (!ld) 80116615be1SSteven Whitehouse return; 80216615be1SSteven Whitehouse 80316615be1SSteven Whitehouse ld->ld_length = cpu_to_be32(n + 1); 80416615be1SSteven Whitehouse ld->ld_data1 = cpu_to_be32(n); 805e8c92ed7SSteven Whitehouse ptr = (__force __be64 *)(ld + 1); 80616615be1SSteven Whitehouse 807e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 80816615be1SSteven Whitehouse gfs2_log_lock(sdp); 80916615be1SSteven Whitehouse while (!list_empty(list)) { 81016615be1SSteven Whitehouse bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list); 81116615be1SSteven Whitehouse list_move_tail(&bd->bd_le.le_list, done); 81216615be1SSteven Whitehouse get_bh(bd->bd_bh); 81316615be1SSteven Whitehouse gfs2_log_unlock(sdp); 81416615be1SSteven Whitehouse lock_buffer(bd->bd_bh); 81516615be1SSteven Whitehouse if (buffer_escaped(bd->bd_bh)) { 81616615be1SSteven Whitehouse void *kaddr; 817e8c92ed7SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 818e8c92ed7SSteven Whitehouse ptr = page_address(page); 819d9349285SCong Wang kaddr = kmap_atomic(bd->bd_bh->b_page); 820e8c92ed7SSteven Whitehouse memcpy(ptr, kaddr + bh_offset(bd->bd_bh), 821e8c92ed7SSteven Whitehouse bd->bd_bh->b_size); 822d9349285SCong Wang kunmap_atomic(kaddr); 823e8c92ed7SSteven Whitehouse *(__be32 *)ptr = 0; 82416615be1SSteven Whitehouse clear_buffer_escaped(bd->bd_bh); 82516615be1SSteven Whitehouse unlock_buffer(bd->bd_bh); 82616615be1SSteven Whitehouse brelse(bd->bd_bh); 827e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 82816615be1SSteven Whitehouse } else { 829e8c92ed7SSteven Whitehouse gfs2_log_write_bh(sdp, bd->bd_bh); 83016615be1SSteven Whitehouse } 831e8c92ed7SSteven Whitehouse n--; 83216615be1SSteven Whitehouse gfs2_log_lock(sdp); 83316615be1SSteven Whitehouse } 83416615be1SSteven Whitehouse gfs2_log_unlock(sdp); 835e8c92ed7SSteven Whitehouse BUG_ON(n != 0); 83618ec7d5cSSteven Whitehouse } 83718ec7d5cSSteven Whitehouse 83818ec7d5cSSteven Whitehouse /** 83918ec7d5cSSteven Whitehouse * databuf_lo_before_commit - Scan the data buffers, writing as we go 84018ec7d5cSSteven Whitehouse * 84118ec7d5cSSteven Whitehouse */ 842d7b616e2SSteven Whitehouse 843b3b94faaSDavid Teigland static void databuf_lo_before_commit(struct gfs2_sbd *sdp) 844b3b94faaSDavid Teigland { 84516615be1SSteven Whitehouse struct gfs2_bufdata *bd = NULL; 846e8c92ed7SSteven Whitehouse struct gfs2_log_descriptor *ld = NULL; 847e8c92ed7SSteven Whitehouse struct page *page = NULL; 84816615be1SSteven Whitehouse unsigned int n = 0; 84916615be1SSteven Whitehouse __be64 *ptr = NULL, *end = NULL; 85016615be1SSteven Whitehouse LIST_HEAD(processed); 85116615be1SSteven Whitehouse LIST_HEAD(in_progress); 852b3b94faaSDavid Teigland 853f55ab26aSSteven Whitehouse gfs2_log_lock(sdp); 85416615be1SSteven Whitehouse while (!list_empty(&sdp->sd_log_le_databuf)) { 85516615be1SSteven Whitehouse if (ptr == end) { 856f55ab26aSSteven Whitehouse gfs2_log_unlock(sdp); 857e8c92ed7SSteven Whitehouse gfs2_write_blocks(sdp, ld, page, &in_progress, &processed, n); 858d7b616e2SSteven Whitehouse n = 0; 859e8c92ed7SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA); 860e8c92ed7SSteven Whitehouse ld = page_address(page); 861e8c92ed7SSteven Whitehouse ptr = (__force __be64 *)(ld + 1); 862e8c92ed7SSteven Whitehouse end = (__force __be64 *)(page_address(page) + sdp->sd_vfs->s_blocksize); 863e8c92ed7SSteven Whitehouse end--; 864f55ab26aSSteven Whitehouse gfs2_log_lock(sdp); 86518ec7d5cSSteven Whitehouse continue; 86616615be1SSteven Whitehouse } 86716615be1SSteven Whitehouse bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list); 86816615be1SSteven Whitehouse list_move_tail(&bd->bd_le.le_list, &in_progress); 86916615be1SSteven Whitehouse gfs2_check_magic(bd->bd_bh); 87016615be1SSteven Whitehouse *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr); 871e8c92ed7SSteven Whitehouse *ptr++ = cpu_to_be64(buffer_escaped(bd->bd_bh) ? 1 : 0); 87216615be1SSteven Whitehouse n++; 87316615be1SSteven Whitehouse } 874f55ab26aSSteven Whitehouse gfs2_log_unlock(sdp); 875e8c92ed7SSteven Whitehouse gfs2_write_blocks(sdp, ld, page, &in_progress, &processed, n); 876f55ab26aSSteven Whitehouse gfs2_log_lock(sdp); 87716615be1SSteven Whitehouse list_splice(&processed, &sdp->sd_log_le_databuf); 878f55ab26aSSteven Whitehouse gfs2_log_unlock(sdp); 879b3b94faaSDavid Teigland } 880b3b94faaSDavid Teigland 88118ec7d5cSSteven Whitehouse static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 88218ec7d5cSSteven Whitehouse struct gfs2_log_descriptor *ld, 88318ec7d5cSSteven Whitehouse __be64 *ptr, int pass) 88418ec7d5cSSteven Whitehouse { 885feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 886feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 8875c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 88818ec7d5cSSteven Whitehouse unsigned int blks = be32_to_cpu(ld->ld_data1); 88918ec7d5cSSteven Whitehouse struct buffer_head *bh_log, *bh_ip; 890cd915493SSteven Whitehouse u64 blkno; 891cd915493SSteven Whitehouse u64 esc; 89218ec7d5cSSteven Whitehouse int error = 0; 89318ec7d5cSSteven Whitehouse 89418ec7d5cSSteven Whitehouse if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 89518ec7d5cSSteven Whitehouse return 0; 89618ec7d5cSSteven Whitehouse 89718ec7d5cSSteven Whitehouse gfs2_replay_incr_blk(sdp, &start); 89818ec7d5cSSteven Whitehouse for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 89918ec7d5cSSteven Whitehouse blkno = be64_to_cpu(*ptr++); 90018ec7d5cSSteven Whitehouse esc = be64_to_cpu(*ptr++); 90118ec7d5cSSteven Whitehouse 90218ec7d5cSSteven Whitehouse sdp->sd_found_blocks++; 90318ec7d5cSSteven Whitehouse 90418ec7d5cSSteven Whitehouse if (gfs2_revoke_check(sdp, blkno, start)) 90518ec7d5cSSteven Whitehouse continue; 90618ec7d5cSSteven Whitehouse 90718ec7d5cSSteven Whitehouse error = gfs2_replay_read_block(jd, start, &bh_log); 90818ec7d5cSSteven Whitehouse if (error) 90918ec7d5cSSteven Whitehouse return error; 91018ec7d5cSSteven Whitehouse 91118ec7d5cSSteven Whitehouse bh_ip = gfs2_meta_new(gl, blkno); 91218ec7d5cSSteven Whitehouse memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 91318ec7d5cSSteven Whitehouse 91418ec7d5cSSteven Whitehouse /* Unescape */ 91518ec7d5cSSteven Whitehouse if (esc) { 91618ec7d5cSSteven Whitehouse __be32 *eptr = (__be32 *)bh_ip->b_data; 91718ec7d5cSSteven Whitehouse *eptr = cpu_to_be32(GFS2_MAGIC); 91818ec7d5cSSteven Whitehouse } 91918ec7d5cSSteven Whitehouse mark_buffer_dirty(bh_ip); 92018ec7d5cSSteven Whitehouse 92118ec7d5cSSteven Whitehouse brelse(bh_log); 92218ec7d5cSSteven Whitehouse brelse(bh_ip); 92318ec7d5cSSteven Whitehouse 92418ec7d5cSSteven Whitehouse sdp->sd_replayed_blocks++; 92518ec7d5cSSteven Whitehouse } 92618ec7d5cSSteven Whitehouse 92718ec7d5cSSteven Whitehouse return error; 92818ec7d5cSSteven Whitehouse } 92918ec7d5cSSteven Whitehouse 93018ec7d5cSSteven Whitehouse /* FIXME: sort out accounting for log blocks etc. */ 93118ec7d5cSSteven Whitehouse 93218ec7d5cSSteven Whitehouse static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 93318ec7d5cSSteven Whitehouse { 934feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 935feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 93618ec7d5cSSteven Whitehouse 93718ec7d5cSSteven Whitehouse if (error) { 9387276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 93918ec7d5cSSteven Whitehouse return; 94018ec7d5cSSteven Whitehouse } 94118ec7d5cSSteven Whitehouse if (pass != 1) 94218ec7d5cSSteven Whitehouse return; 94318ec7d5cSSteven Whitehouse 94418ec7d5cSSteven Whitehouse /* data sync? */ 9457276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 94618ec7d5cSSteven Whitehouse 94718ec7d5cSSteven Whitehouse fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 94818ec7d5cSSteven Whitehouse jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 94918ec7d5cSSteven Whitehouse } 95018ec7d5cSSteven Whitehouse 95118ec7d5cSSteven Whitehouse static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 95218ec7d5cSSteven Whitehouse { 95318ec7d5cSSteven Whitehouse struct list_head *head = &sdp->sd_log_le_databuf; 95418ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd; 95518ec7d5cSSteven Whitehouse 95618ec7d5cSSteven Whitehouse while (!list_empty(head)) { 95718ec7d5cSSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 958b8e1aabfSSteven Whitehouse list_del_init(&bd->bd_le.le_list); 95918ec7d5cSSteven Whitehouse sdp->sd_log_num_databuf--; 96018ec7d5cSSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 96118ec7d5cSSteven Whitehouse } 96218ec7d5cSSteven Whitehouse gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); 96318ec7d5cSSteven Whitehouse } 96418ec7d5cSSteven Whitehouse 96518ec7d5cSSteven Whitehouse 966b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_buf_lops = { 967b3b94faaSDavid Teigland .lo_add = buf_lo_add, 968b3b94faaSDavid Teigland .lo_before_commit = buf_lo_before_commit, 969b3b94faaSDavid Teigland .lo_after_commit = buf_lo_after_commit, 970b3b94faaSDavid Teigland .lo_before_scan = buf_lo_before_scan, 971b3b94faaSDavid Teigland .lo_scan_elements = buf_lo_scan_elements, 972b3b94faaSDavid Teigland .lo_after_scan = buf_lo_after_scan, 973ea67eedbSSteven Whitehouse .lo_name = "buf", 974b3b94faaSDavid Teigland }; 975b3b94faaSDavid Teigland 976b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_revoke_lops = { 977b3b94faaSDavid Teigland .lo_add = revoke_lo_add, 978b3b94faaSDavid Teigland .lo_before_commit = revoke_lo_before_commit, 979f42ab085SSteven Whitehouse .lo_after_commit = revoke_lo_after_commit, 980b3b94faaSDavid Teigland .lo_before_scan = revoke_lo_before_scan, 981b3b94faaSDavid Teigland .lo_scan_elements = revoke_lo_scan_elements, 982b3b94faaSDavid Teigland .lo_after_scan = revoke_lo_after_scan, 983ea67eedbSSteven Whitehouse .lo_name = "revoke", 984b3b94faaSDavid Teigland }; 985b3b94faaSDavid Teigland 986b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_rg_lops = { 987ea67eedbSSteven Whitehouse .lo_name = "rg", 988b3b94faaSDavid Teigland }; 989b3b94faaSDavid Teigland 990b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_databuf_lops = { 991b3b94faaSDavid Teigland .lo_add = databuf_lo_add, 992b3b94faaSDavid Teigland .lo_before_commit = databuf_lo_before_commit, 99318ec7d5cSSteven Whitehouse .lo_after_commit = databuf_lo_after_commit, 99418ec7d5cSSteven Whitehouse .lo_scan_elements = databuf_lo_scan_elements, 99518ec7d5cSSteven Whitehouse .lo_after_scan = databuf_lo_after_scan, 996ea67eedbSSteven Whitehouse .lo_name = "databuf", 997b3b94faaSDavid Teigland }; 998b3b94faaSDavid Teigland 999b09e593dSSteven Whitehouse const struct gfs2_log_operations *gfs2_log_ops[] = { 1000b3b94faaSDavid Teigland &gfs2_databuf_lops, 100116615be1SSteven Whitehouse &gfs2_buf_lops, 100216615be1SSteven Whitehouse &gfs2_rg_lops, 100316615be1SSteven Whitehouse &gfs2_revoke_lops, 1004ea67eedbSSteven Whitehouse NULL, 1005b3b94faaSDavid Teigland }; 1006b3b94faaSDavid Teigland 1007