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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 08:30:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 08:30:10 -0700
commitba1bdefec36c45eef1f8aa44bd845c9ea3190506 (patch)
treef8887d158890be11b38ba809dd461685c136059c /fs/gfs2/glops.c
parent74efa045f4e2fdcc9d6384004c5b1bba0cc1fd3c (diff)
parent0e48e055a7dfc0cf17bbabe4d9b523ee0b1a9ed6 (diff)
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Merge tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw into next
Pull gfs2 updates from Steven Whitehouse: "This must be about the smallest merge window patch set ever for GFS2. It is probably also the first one without a single patch from me. That is down to a combination of factors, and I have some things in the works that are not quite ready yet, that I hope to put in next time around. Returning to what is here this time... we have 3 patches which fix various warnings. Two are bug fixes (for quotas and also a rare recovery race condition). The final patch, from Ben Marzinski, is an important change in the freeze code which has been in progress for some time. This removes the need to take and drop the transaction lock for every single transaction, when the only time it was used, was at file system freeze time. Ben's patch integrates the freeze operation into the journal flush code as an alternative with lower overheads and also lands up resolving some difficult to fix races at the same time" * tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw: GFS2: Prevent recovery before the local journal is set GFS2: fs/gfs2/file.c: kernel-doc warning fixes GFS2: fs/gfs2/bmap.c: kernel-doc warning fixes GFS2: remove transaction glock GFS2: lops.c: replace 0 by NULL for pointers GFS2: quotas not being refreshed in gfs2_adjust_quota
Diffstat (limited to 'fs/gfs2/glops.c')
-rw-r--r--fs/gfs2/glops.c51
1 files changed, 32 insertions, 19 deletions
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 74d9a3dbf16f..fc1100781bbc 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -89,18 +89,23 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
if (!tr.tr_revokes)
return;
- /* A shortened, inline version of gfs2_trans_begin() */
+ /* A shortened, inline version of gfs2_trans_begin()
+ * tr->alloced is not set since the transaction structure is
+ * on the stack */
tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
tr.tr_ip = (unsigned long)__builtin_return_address(0);
sb_start_intwrite(sdp->sd_vfs);
- gfs2_log_reserve(sdp, tr.tr_reserved);
+ if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0) {
+ sb_end_intwrite(sdp->sd_vfs);
+ return;
+ }
WARN_ON_ONCE(current->journal_info);
current->journal_info = &tr;
__gfs2_ail_flush(gl, 0, tr.tr_revokes);
gfs2_trans_end(sdp);
- gfs2_log_flush(sdp, NULL);
+ gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
}
void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
@@ -121,7 +126,7 @@ void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
return;
__gfs2_ail_flush(gl, fsync, max_revokes);
gfs2_trans_end(sdp);
- gfs2_log_flush(sdp, NULL);
+ gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
}
/**
@@ -144,7 +149,7 @@ static void rgrp_go_sync(struct gfs2_glock *gl)
return;
GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
- gfs2_log_flush(sdp, gl);
+ gfs2_log_flush(sdp, gl, NORMAL_FLUSH);
filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
mapping_set_error(mapping, error);
@@ -206,7 +211,7 @@ static void inode_go_sync(struct gfs2_glock *gl)
GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
- gfs2_log_flush(gl->gl_sbd, gl);
+ gfs2_log_flush(gl->gl_sbd, gl, NORMAL_FLUSH);
filemap_fdatawrite(metamapping);
if (ip) {
struct address_space *mapping = ip->i_inode.i_mapping;
@@ -253,7 +258,7 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
}
if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
- gfs2_log_flush(gl->gl_sbd, NULL);
+ gfs2_log_flush(gl->gl_sbd, NULL, NORMAL_FLUSH);
gl->gl_sbd->sd_rindex_uptodate = 0;
}
if (ip && S_ISREG(ip->i_inode.i_mode))
@@ -455,31 +460,39 @@ static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
}
/**
- * trans_go_sync - promote/demote the transaction glock
+ * freeze_go_sync - promote/demote the freeze glock
* @gl: the glock
* @state: the requested state
* @flags:
*
*/
-static void trans_go_sync(struct gfs2_glock *gl)
+static void freeze_go_sync(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
+ DEFINE_WAIT(wait);
- if (gl->gl_state != LM_ST_UNLOCKED &&
+ if (gl->gl_state == LM_ST_SHARED &&
test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
- gfs2_meta_syncfs(sdp);
- gfs2_log_shutdown(sdp);
+ atomic_set(&sdp->sd_log_freeze, 1);
+ wake_up(&sdp->sd_logd_waitq);
+ do {
+ prepare_to_wait(&sdp->sd_log_frozen_wait, &wait,
+ TASK_UNINTERRUPTIBLE);
+ if (atomic_read(&sdp->sd_log_freeze))
+ io_schedule();
+ } while(atomic_read(&sdp->sd_log_freeze));
+ finish_wait(&sdp->sd_log_frozen_wait, &wait);
}
}
/**
- * trans_go_xmote_bh - After promoting/demoting the transaction glock
+ * freeze_go_xmote_bh - After promoting/demoting the freeze glock
* @gl: the glock
*
*/
-static int trans_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
+static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
@@ -512,7 +525,7 @@ static int trans_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
* Always returns 0
*/
-static int trans_go_demote_ok(const struct gfs2_glock *gl)
+static int freeze_go_demote_ok(const struct gfs2_glock *gl)
{
return 0;
}
@@ -563,10 +576,10 @@ const struct gfs2_glock_operations gfs2_rgrp_glops = {
.go_flags = GLOF_LVB,
};
-const struct gfs2_glock_operations gfs2_trans_glops = {
- .go_sync = trans_go_sync,
- .go_xmote_bh = trans_go_xmote_bh,
- .go_demote_ok = trans_go_demote_ok,
+const struct gfs2_glock_operations gfs2_freeze_glops = {
+ .go_sync = freeze_go_sync,
+ .go_xmote_bh = freeze_go_xmote_bh,
+ .go_demote_ok = freeze_go_demote_ok,
.go_type = LM_TYPE_NONDISK,
};