Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
David Teigland | 611 | 34.60% | 1 | 1.30% |
Steven Whitehouse | 567 | 32.11% | 34 | 44.16% |
Robert S Peterson | 308 | 17.44% | 16 | 20.78% |
Andreas Gruenbacher | 208 | 11.78% | 14 | 18.18% |
Benjamin Marzinski | 29 | 1.64% | 5 | 6.49% |
Jan Kara | 25 | 1.42% | 1 | 1.30% |
Joe Perches | 13 | 0.74% | 2 | 2.60% |
Thomas Gleixner | 2 | 0.11% | 1 | 1.30% |
Linus Torvalds | 1 | 0.06% | 1 | 1.30% |
David Chinner | 1 | 0.06% | 1 | 1.30% |
Fabio Massimo Di Nitto | 1 | 0.06% | 1 | 1.30% |
Total | 1766 | 77 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/sched.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/completion.h> #include <linux/buffer_head.h> #include <linux/kallsyms.h> #include <linux/gfs2_ondisk.h> #include "gfs2.h" #include "incore.h" #include "glock.h" #include "inode.h" #include "log.h" #include "lops.h" #include "meta_io.h" #include "trans.h" #include "util.h" #include "trace_gfs2.h" static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr) { fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip); fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n", tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, test_bit(TR_TOUCHED, &tr->tr_flags)); fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u\n", tr->tr_num_buf_new, tr->tr_num_buf_rm, tr->tr_num_databuf_new, tr->tr_num_databuf_rm, tr->tr_num_revoke); } int __gfs2_trans_begin(struct gfs2_trans *tr, struct gfs2_sbd *sdp, unsigned int blocks, unsigned int revokes, unsigned long ip) { unsigned int extra_revokes; if (current->journal_info) { gfs2_print_trans(sdp, current->journal_info); BUG(); } BUG_ON(blocks == 0 && revokes == 0); if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) return -EROFS; tr->tr_ip = ip; tr->tr_blocks = blocks; tr->tr_revokes = revokes; tr->tr_reserved = GFS2_LOG_FLUSH_MIN_BLOCKS; if (blocks) { /* * The reserved blocks are either used for data or metadata. * We can have mixed data and metadata, each with its own log * descriptor block; see calc_reserved(). */ tr->tr_reserved += blocks + 1 + DIV_ROUND_UP(blocks - 1, databuf_limit(sdp)); } INIT_LIST_HEAD(&tr->tr_databuf); INIT_LIST_HEAD(&tr->tr_buf); INIT_LIST_HEAD(&tr->tr_list); INIT_LIST_HEAD(&tr->tr_ail1_list); INIT_LIST_HEAD(&tr->tr_ail2_list); if (gfs2_assert_warn(sdp, tr->tr_reserved <= sdp->sd_jdesc->jd_blocks)) return -EINVAL; sb_start_intwrite(sdp->sd_vfs); /* * Try the reservations under sd_log_flush_lock to prevent log flushes * from creating inconsistencies between the number of allocated and * reserved revokes. If that fails, do a full-block allocation outside * of the lock to avoid stalling log flushes. Then, allot the * appropriate number of blocks to revokes, use as many revokes locally * as needed, and "release" the surplus into the revokes pool. */ down_read(&sdp->sd_log_flush_lock); if (gfs2_log_try_reserve(sdp, tr, &extra_revokes)) goto reserved; up_read(&sdp->sd_log_flush_lock); gfs2_log_reserve(sdp, tr, &extra_revokes); down_read(&sdp->sd_log_flush_lock); reserved: gfs2_log_release_revokes(sdp, extra_revokes); if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) { gfs2_log_release_revokes(sdp, tr->tr_revokes); up_read(&sdp->sd_log_flush_lock); gfs2_log_release(sdp, tr->tr_reserved); sb_end_intwrite(sdp->sd_vfs); return -EROFS; } current->journal_info = tr; return 0; } int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks, unsigned int revokes) { struct gfs2_trans *tr; int error; tr = kmem_cache_zalloc(gfs2_trans_cachep, GFP_NOFS); if (!tr) return -ENOMEM; error = __gfs2_trans_begin(tr, sdp, blocks, revokes, _RET_IP_); if (error) kmem_cache_free(gfs2_trans_cachep, tr); return error; } void gfs2_trans_end(struct gfs2_sbd *sdp) { struct gfs2_trans *tr = current->journal_info; s64 nbuf; current->journal_info = NULL; if (!test_bit(TR_TOUCHED, &tr->tr_flags)) { gfs2_log_release_revokes(sdp, tr->tr_revokes); up_read(&sdp->sd_log_flush_lock); gfs2_log_release(sdp, tr->tr_reserved); if (!test_bit(TR_ONSTACK, &tr->tr_flags)) gfs2_trans_free(sdp, tr); sb_end_intwrite(sdp->sd_vfs); return; } gfs2_log_release_revokes(sdp, tr->tr_revokes - tr->tr_num_revoke); nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new; nbuf -= tr->tr_num_buf_rm; nbuf -= tr->tr_num_databuf_rm; if (gfs2_assert_withdraw(sdp, nbuf <= tr->tr_blocks) || gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) gfs2_print_trans(sdp, tr); gfs2_log_commit(sdp, tr); if (!test_bit(TR_ONSTACK, &tr->tr_flags) && !test_bit(TR_ATTACHED, &tr->tr_flags)) gfs2_trans_free(sdp, tr); up_read(&sdp->sd_log_flush_lock); if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS) gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_TRANS_END); sb_end_intwrite(sdp->sd_vfs); } static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl, struct buffer_head *bh) { struct gfs2_bufdata *bd; bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL); bd->bd_bh = bh; bd->bd_gl = gl; INIT_LIST_HEAD(&bd->bd_list); INIT_LIST_HEAD(&bd->bd_ail_st_list); INIT_LIST_HEAD(&bd->bd_ail_gl_list); bh->b_private = bd; return bd; } /** * gfs2_trans_add_data - Add a databuf to the transaction. * @gl: The inode glock associated with the buffer * @bh: The buffer to add * * This is used in journaled data mode. * We need to journal the data block in the same way as metadata in * the functions above. The difference is that here we have a tag * which is two __be64's being the block number (as per meta data) * and a flag which says whether the data block needs escaping or * not. This means we need a new log entry for each 251 or so data * blocks, which isn't an enormous overhead but twice as much as * for normal metadata blocks. */ void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh) { struct gfs2_trans *tr = current->journal_info; struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; struct gfs2_bufdata *bd; lock_buffer(bh); if (buffer_pinned(bh)) { set_bit(TR_TOUCHED, &tr->tr_flags); goto out; } gfs2_log_lock(sdp); bd = bh->b_private; if (bd == NULL) { gfs2_log_unlock(sdp); unlock_buffer(bh); if (bh->b_private == NULL) bd = gfs2_alloc_bufdata(gl, bh); else bd = bh->b_private; lock_buffer(bh); gfs2_log_lock(sdp); } gfs2_assert(sdp, bd->bd_gl == gl); set_bit(TR_TOUCHED, &tr->tr_flags); if (list_empty(&bd->bd_list)) { set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); gfs2_pin(sdp, bd->bd_bh); tr->tr_num_databuf_new++; list_add_tail(&bd->bd_list, &tr->tr_databuf); } gfs2_log_unlock(sdp); out: unlock_buffer(bh); } void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh) { struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; struct super_block *sb = sdp->sd_vfs; struct gfs2_bufdata *bd; struct gfs2_meta_header *mh; struct gfs2_trans *tr = current->journal_info; bool withdraw = false; lock_buffer(bh); if (buffer_pinned(bh)) { set_bit(TR_TOUCHED, &tr->tr_flags); goto out; } gfs2_log_lock(sdp); bd = bh->b_private; if (bd == NULL) { gfs2_log_unlock(sdp); unlock_buffer(bh); lock_page(bh->b_page); if (bh->b_private == NULL) bd = gfs2_alloc_bufdata(gl, bh); else bd = bh->b_private; unlock_page(bh->b_page); lock_buffer(bh); gfs2_log_lock(sdp); } gfs2_assert(sdp, bd->bd_gl == gl); set_bit(TR_TOUCHED, &tr->tr_flags); if (!list_empty(&bd->bd_list)) goto out_unlock; set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) { fs_err(sdp, "Attempting to add uninitialised block to " "journal (inplace block=%lld)\n", (unsigned long long)bd->bd_bh->b_blocknr); BUG(); } if (gfs2_withdrawing_or_withdrawn(sdp)) { fs_info(sdp, "GFS2:adding buf while withdrawn! 0x%llx\n", (unsigned long long)bd->bd_bh->b_blocknr); goto out_unlock; } if (unlikely(sb->s_writers.frozen == SB_FREEZE_COMPLETE)) { fs_info(sdp, "GFS2:adding buf while frozen\n"); withdraw = true; goto out_unlock; } gfs2_pin(sdp, bd->bd_bh); mh->__pad0 = cpu_to_be64(0); mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); list_add(&bd->bd_list, &tr->tr_buf); tr->tr_num_buf_new++; out_unlock: gfs2_log_unlock(sdp); if (withdraw) gfs2_assert_withdraw(sdp, 0); out: unlock_buffer(bh); } void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) { struct gfs2_trans *tr = current->journal_info; BUG_ON(!list_empty(&bd->bd_list)); gfs2_add_revoke(sdp, bd); set_bit(TR_TOUCHED, &tr->tr_flags); tr->tr_num_revoke++; } void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len) { struct gfs2_bufdata *bd, *tmp; unsigned int n = len; gfs2_log_lock(sdp); list_for_each_entry_safe(bd, tmp, &sdp->sd_log_revokes, bd_list) { if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) { list_del_init(&bd->bd_list); gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); sdp->sd_log_num_revoke--; if (bd->bd_gl) gfs2_glock_remove_revoke(bd->bd_gl); kmem_cache_free(gfs2_bufdata_cachep, bd); gfs2_log_release_revokes(sdp, 1); if (--n == 0) break; } } gfs2_log_unlock(sdp); } void gfs2_trans_free(struct gfs2_sbd *sdp, struct gfs2_trans *tr) { if (tr == NULL) return; gfs2_assert_warn(sdp, list_empty(&tr->tr_ail1_list)); gfs2_assert_warn(sdp, list_empty(&tr->tr_ail2_list)); gfs2_assert_warn(sdp, list_empty(&tr->tr_databuf)); gfs2_assert_warn(sdp, list_empty(&tr->tr_buf)); kmem_cache_free(gfs2_trans_cachep, tr); }
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