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gfs2 fixes

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- Fix a freeze consistency check in gfs2_trans_add_meta().
 
 - Don't use filemap_splice_read as it can cause deadlocks on gfs2.
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Merge tag 'gfs2-v6.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fixes from Andreas Gruenbacher:

 - Fix a freeze consistency check in gfs2_trans_add_meta()

 - Don't use filemap_splice_read as it can cause deadlocks on gfs2

* tag 'gfs2-v6.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Don't use filemap_splice_read
  gfs2: Fix freeze consistency check in gfs2_trans_add_meta
This commit is contained in:
Linus Torvalds 2023-08-08 09:27:08 -07:00
commit 02aee814d3
2 changed files with 12 additions and 6 deletions
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4
fs/gfs2/file.c
View File

@ -1578,7 +1578,7 @@ const struct file_operations gfs2_file_fops = {
.fsync = gfs2_fsync,
.lock = gfs2_lock,
.flock = gfs2_flock,
.splice_read = filemap_splice_read,
.splice_read = copy_splice_read,
.splice_write = gfs2_file_splice_write,
.setlease = simple_nosetlease,
.fallocate = gfs2_fallocate,
@ -1609,7 +1609,7 @@ const struct file_operations gfs2_file_fops_nolock = {
.open = gfs2_open,
.release = gfs2_release,
.fsync = gfs2_fsync,
.splice_read = filemap_splice_read,
.splice_read = copy_splice_read,
.splice_write = gfs2_file_splice_write,
.setlease = generic_setlease,
.fallocate = gfs2_fallocate,

14
fs/gfs2/trans.c
View File

@ -230,9 +230,11 @@ 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)) {
@ -266,13 +268,15 @@ void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
(unsigned long long)bd->bd_bh->b_blocknr);
BUG();
}
if (unlikely(test_bit(SDF_FROZEN, &sdp->sd_flags))) {
fs_info(sdp, "GFS2:adding buf while frozen\n");
gfs2_assert_withdraw(sdp, 0);
}
if (unlikely(gfs2_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fs_info(sdp, "GFS2:adding buf while withdrawn! 0x%llx\n",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);
@ -281,6 +285,8 @@ void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
tr->tr_num_buf_new++;
out_unlock:
gfs2_log_unlock(sdp);
if (withdraw)
gfs2_assert_withdraw(sdp, 0);
out:
unlock_buffer(bh);
}