From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/fs/gfs2/recovery.c | 334 ++++++++++++++++++++++++++++---------------------------
1 files changed, 172 insertions(+), 162 deletions(-)
diff --git a/kernel/fs/gfs2/recovery.c b/kernel/fs/gfs2/recovery.c
index 0f501f9..8f9c648 100644
--- a/kernel/fs/gfs2/recovery.c
+++ b/kernel/fs/gfs2/recovery.c
@@ -1,10 +1,7 @@
+// 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.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
*/
#include <linux/module.h>
@@ -114,12 +111,45 @@
struct gfs2_revoke_replay *rr;
while (!list_empty(head)) {
- rr = list_entry(head->next, struct gfs2_revoke_replay, rr_list);
+ rr = list_first_entry(head, struct gfs2_revoke_replay, rr_list);
list_del(&rr->rr_list);
kfree(rr);
}
}
+int __get_log_header(struct gfs2_sbd *sdp, const struct gfs2_log_header *lh,
+ unsigned int blkno, struct gfs2_log_header_host *head)
+{
+ u32 hash, crc;
+
+ if (lh->lh_header.mh_magic != cpu_to_be32(GFS2_MAGIC) ||
+ lh->lh_header.mh_type != cpu_to_be32(GFS2_METATYPE_LH) ||
+ (blkno && be32_to_cpu(lh->lh_blkno) != blkno))
+ return 1;
+
+ hash = crc32(~0, lh, LH_V1_SIZE - 4);
+ hash = ~crc32_le_shift(hash, 4); /* assume lh_hash is zero */
+
+ if (be32_to_cpu(lh->lh_hash) != hash)
+ return 1;
+
+ crc = crc32c(~0, (void *)lh + LH_V1_SIZE + 4,
+ sdp->sd_sb.sb_bsize - LH_V1_SIZE - 4);
+
+ if ((lh->lh_crc != 0 && be32_to_cpu(lh->lh_crc) != crc))
+ return 1;
+
+ head->lh_sequence = be64_to_cpu(lh->lh_sequence);
+ head->lh_flags = be32_to_cpu(lh->lh_flags);
+ head->lh_tail = be32_to_cpu(lh->lh_tail);
+ head->lh_blkno = be32_to_cpu(lh->lh_blkno);
+
+ head->lh_local_total = be64_to_cpu(lh->lh_local_total);
+ head->lh_local_free = be64_to_cpu(lh->lh_local_free);
+ head->lh_local_dinodes = be64_to_cpu(lh->lh_local_dinodes);
+
+ return 0;
+}
/**
* get_log_header - read the log header for a given segment
* @jd: the journal
@@ -137,158 +167,17 @@
static int get_log_header(struct gfs2_jdesc *jd, unsigned int blk,
struct gfs2_log_header_host *head)
{
- struct gfs2_log_header *lh;
+ struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
struct buffer_head *bh;
- u32 hash, crc;
int error;
error = gfs2_replay_read_block(jd, blk, &bh);
if (error)
return error;
- lh = (void *)bh->b_data;
- hash = crc32(~0, lh, LH_V1_SIZE - 4);
- hash = ~crc32_le_shift(hash, 4); /* assume lh_hash is zero */
-
- crc = crc32c(~0, (void *)lh + LH_V1_SIZE + 4,
- bh->b_size - LH_V1_SIZE - 4);
-
- error = lh->lh_header.mh_magic != cpu_to_be32(GFS2_MAGIC) ||
- lh->lh_header.mh_type != cpu_to_be32(GFS2_METATYPE_LH) ||
- be32_to_cpu(lh->lh_blkno) != blk ||
- be32_to_cpu(lh->lh_hash) != hash ||
- (lh->lh_crc != 0 && be32_to_cpu(lh->lh_crc) != crc);
-
+ error = __get_log_header(sdp, (const struct gfs2_log_header *)bh->b_data,
+ blk, head);
brelse(bh);
-
- if (!error) {
- head->lh_sequence = be64_to_cpu(lh->lh_sequence);
- head->lh_flags = be32_to_cpu(lh->lh_flags);
- head->lh_tail = be32_to_cpu(lh->lh_tail);
- head->lh_blkno = be32_to_cpu(lh->lh_blkno);
- }
- return error;
-}
-
-/**
- * find_good_lh - find a good log header
- * @jd: the journal
- * @blk: the segment to start searching from
- * @lh: the log header to fill in
- * @forward: if true search forward in the log, else search backward
- *
- * Call get_log_header() to get a log header for a segment, but if the
- * segment is bad, either scan forward or backward until we find a good one.
- *
- * Returns: errno
- */
-
-static int find_good_lh(struct gfs2_jdesc *jd, unsigned int *blk,
- struct gfs2_log_header_host *head)
-{
- unsigned int orig_blk = *blk;
- int error;
-
- for (;;) {
- error = get_log_header(jd, *blk, head);
- if (error <= 0)
- return error;
-
- if (++*blk == jd->jd_blocks)
- *blk = 0;
-
- if (*blk == orig_blk) {
- gfs2_consist_inode(GFS2_I(jd->jd_inode));
- return -EIO;
- }
- }
-}
-
-/**
- * jhead_scan - make sure we've found the head of the log
- * @jd: the journal
- * @head: this is filled in with the log descriptor of the head
- *
- * At this point, seg and lh should be either the head of the log or just
- * before. Scan forward until we find the head.
- *
- * Returns: errno
- */
-
-static int jhead_scan(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head)
-{
- unsigned int blk = head->lh_blkno;
- struct gfs2_log_header_host lh;
- int error;
-
- for (;;) {
- if (++blk == jd->jd_blocks)
- blk = 0;
-
- error = get_log_header(jd, blk, &lh);
- if (error < 0)
- return error;
- if (error == 1)
- continue;
-
- if (lh.lh_sequence == head->lh_sequence) {
- gfs2_consist_inode(GFS2_I(jd->jd_inode));
- return -EIO;
- }
- if (lh.lh_sequence < head->lh_sequence)
- break;
-
- *head = lh;
- }
-
- return 0;
-}
-
-/**
- * gfs2_find_jhead - find the head of a log
- * @jd: the journal
- * @head: the log descriptor for the head of the log is returned here
- *
- * Do a binary search of a journal and find the valid log entry with the
- * highest sequence number. (i.e. the log head)
- *
- * Returns: errno
- */
-
-int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head)
-{
- struct gfs2_log_header_host lh_1, lh_m;
- u32 blk_1, blk_2, blk_m;
- int error;
-
- blk_1 = 0;
- blk_2 = jd->jd_blocks - 1;
-
- for (;;) {
- blk_m = (blk_1 + blk_2) / 2;
-
- error = find_good_lh(jd, &blk_1, &lh_1);
- if (error)
- return error;
-
- error = find_good_lh(jd, &blk_m, &lh_m);
- if (error)
- return error;
-
- if (blk_1 == blk_m || blk_m == blk_2)
- break;
-
- if (lh_1.lh_sequence <= lh_m.lh_sequence)
- blk_1 = blk_m;
- else
- blk_2 = blk_m;
- }
-
- error = jhead_scan(jd, &lh_1);
- if (error)
- return error;
-
- *head = lh_1;
return error;
}
@@ -305,7 +194,7 @@
* Returns: errno
*/
-static int foreach_descriptor(struct gfs2_jdesc *jd, unsigned int start,
+static int foreach_descriptor(struct gfs2_jdesc *jd, u32 start,
unsigned int end, int pass)
{
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
@@ -375,12 +264,16 @@
struct gfs2_log_header_host *head)
{
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+ u32 lblock = head->lh_blkno;
- sdp->sd_log_flush_head = head->lh_blkno;
- gfs2_replay_incr_blk(jd, &sdp->sd_log_flush_head);
- gfs2_write_log_header(sdp, jd, head->lh_sequence + 1, 0,
+ gfs2_replay_incr_blk(jd, &lblock);
+ gfs2_write_log_header(sdp, jd, head->lh_sequence + 1, 0, lblock,
GFS2_LOG_HEAD_UNMOUNT | GFS2_LOG_HEAD_RECOVERY,
REQ_PREFLUSH | REQ_FUA | REQ_META | REQ_SYNC);
+ if (jd->jd_jid == sdp->sd_lockstruct.ls_jid) {
+ sdp->sd_log_flush_head = lblock;
+ gfs2_log_incr_head(sdp);
+ }
}
@@ -403,6 +296,109 @@
sdp->sd_lockstruct.ls_ops->lm_recovery_result(sdp, jid, message);
}
+/**
+ * update_statfs_inode - Update the master statfs inode or zero out the local
+ * statfs inode for a given journal.
+ * @jd: The journal
+ * @head: If NULL, @inode is the local statfs inode and we need to zero it out.
+ * Otherwise, it @head contains the statfs change info that needs to be
+ * synced to the master statfs inode (pointed to by @inode).
+ * @inode: statfs inode to update.
+ */
+static int update_statfs_inode(struct gfs2_jdesc *jd,
+ struct gfs2_log_header_host *head,
+ struct inode *inode)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+ struct gfs2_inode *ip;
+ struct buffer_head *bh;
+ struct gfs2_statfs_change_host sc;
+ int error = 0;
+
+ BUG_ON(!inode);
+ ip = GFS2_I(inode);
+
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ goto out;
+
+ spin_lock(&sdp->sd_statfs_spin);
+
+ if (head) { /* Update the master statfs inode */
+ gfs2_statfs_change_in(&sc, bh->b_data + sizeof(struct gfs2_dinode));
+ sc.sc_total += head->lh_local_total;
+ sc.sc_free += head->lh_local_free;
+ sc.sc_dinodes += head->lh_local_dinodes;
+ gfs2_statfs_change_out(&sc, bh->b_data + sizeof(struct gfs2_dinode));
+
+ fs_info(sdp, "jid=%u: Updated master statfs Total:%lld, "
+ "Free:%lld, Dinodes:%lld after change "
+ "[%+lld,%+lld,%+lld]\n", jd->jd_jid, sc.sc_total,
+ sc.sc_free, sc.sc_dinodes, head->lh_local_total,
+ head->lh_local_free, head->lh_local_dinodes);
+ } else { /* Zero out the local statfs inode */
+ memset(bh->b_data + sizeof(struct gfs2_dinode), 0,
+ sizeof(struct gfs2_statfs_change));
+ /* If it's our own journal, reset any in-memory changes too */
+ if (jd->jd_jid == sdp->sd_lockstruct.ls_jid) {
+ memset(&sdp->sd_statfs_local, 0,
+ sizeof(struct gfs2_statfs_change_host));
+ }
+ }
+ spin_unlock(&sdp->sd_statfs_spin);
+
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ gfs2_inode_metasync(ip->i_gl);
+
+out:
+ return error;
+}
+
+/**
+ * recover_local_statfs - Update the master and local statfs changes for this
+ * journal.
+ *
+ * Previously, statfs updates would be read in from the local statfs inode and
+ * synced to the master statfs inode during recovery.
+ *
+ * We now use the statfs updates in the journal head to update the master statfs
+ * inode instead of reading in from the local statfs inode. To preserve backward
+ * compatibility with kernels that can't do this, we still need to keep the
+ * local statfs inode up to date by writing changes to it. At some point in the
+ * future, we can do away with the local statfs inodes altogether and keep the
+ * statfs changes solely in the journal.
+ *
+ * @jd: the journal
+ * @head: the journal head
+ *
+ * Returns: errno
+ */
+static void recover_local_statfs(struct gfs2_jdesc *jd,
+ struct gfs2_log_header_host *head)
+{
+ int error;
+ struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+
+ if (!head->lh_local_total && !head->lh_local_free
+ && !head->lh_local_dinodes) /* No change */
+ goto zero_local;
+
+ /* First update the master statfs inode with the changes we
+ * found in the journal. */
+ error = update_statfs_inode(jd, head, sdp->sd_statfs_inode);
+ if (error)
+ goto out;
+
+zero_local:
+ /* Zero out the local statfs inode so any changes in there
+ * are not re-recovered. */
+ error = update_statfs_inode(jd, NULL,
+ find_local_statfs_inode(sdp, jd->jd_jid));
+out:
+ return;
+}
+
void gfs2_recover_func(struct work_struct *work)
{
struct gfs2_jdesc *jd = container_of(work, struct gfs2_jdesc, jd_work);
@@ -416,6 +412,11 @@
int error = 0;
int jlocked = 0;
+ if (gfs2_withdrawn(sdp)) {
+ fs_err(sdp, "jid=%u: Recovery not attempted due to withdraw.\n",
+ jd->jd_jid);
+ goto fail;
+ }
t_start = ktime_get();
if (sdp->sd_args.ar_spectator)
goto fail;
@@ -439,7 +440,7 @@
default:
goto fail;
- };
+ }
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
LM_FLAG_NOEXP | GL_NOCACHE, &ji_gh);
@@ -456,10 +457,12 @@
if (error)
goto fail_gunlock_ji;
- error = gfs2_find_jhead(jd, &head);
+ error = gfs2_find_jhead(jd, &head, true);
if (error)
goto fail_gunlock_ji;
t_jhd = ktime_get();
+ fs_info(sdp, "jid=%u: Journal head lookup took %lldms\n", jd->jd_jid,
+ ktime_ms_delta(t_jhd, t_jlck));
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
fs_info(sdp, "jid=%u: Acquiring the transaction lock...\n",
@@ -467,9 +470,7 @@
/* Acquire a shared hold on the freeze lock */
- error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED,
- LM_FLAG_NOEXP | LM_FLAG_PRIORITY,
- &thaw_gh);
+ error = gfs2_freeze_lock(sdp, &thaw_gh, LM_FLAG_PRIORITY);
if (error)
goto fail_gunlock_ji;
@@ -499,20 +500,29 @@
}
t_tlck = ktime_get();
- fs_info(sdp, "jid=%u: Replaying journal...\n", jd->jd_jid);
+ fs_info(sdp, "jid=%u: Replaying journal...0x%x to 0x%x\n",
+ jd->jd_jid, head.lh_tail, head.lh_blkno);
+ /* We take the sd_log_flush_lock here primarily to prevent log
+ * flushes and simultaneous journal replays from stomping on
+ * each other wrt sd_log_bio. */
+ down_read(&sdp->sd_log_flush_lock);
for (pass = 0; pass < 2; pass++) {
lops_before_scan(jd, &head, pass);
error = foreach_descriptor(jd, head.lh_tail,
head.lh_blkno, pass);
lops_after_scan(jd, error, pass);
- if (error)
+ if (error) {
+ up_read(&sdp->sd_log_flush_lock);
goto fail_gunlock_thaw;
+ }
}
+ recover_local_statfs(jd, &head);
clean_journal(jd, &head);
+ up_read(&sdp->sd_log_flush_lock);
- gfs2_glock_dq_uninit(&thaw_gh);
+ gfs2_freeze_unlock(&thaw_gh);
t_rep = ktime_get();
fs_info(sdp, "jid=%u: Journal replayed in %lldms [jlck:%lldms, "
"jhead:%lldms, tlck:%lldms, replay:%lldms]\n",
@@ -534,7 +544,7 @@
goto done;
fail_gunlock_thaw:
- gfs2_glock_dq_uninit(&thaw_gh);
+ gfs2_freeze_unlock(&thaw_gh);
fail_gunlock_ji:
if (jlocked) {
gfs2_glock_dq_uninit(&ji_gh);
--
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