* [PATCH v2] gfs2: Fix deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func
@ 2020-11-30 23:26 ` Andreas Gruenbacher
0 siblings, 0 replies; 2+ messages in thread
From: Andreas Gruenbacher @ 2020-11-30 23:26 UTC (permalink / raw)
To: cluster-devel; +Cc: Andreas Gruenbacher, Alexander Aring, stable
In gfs2_create_inode and gfs2_inode_lookup, make sure to cancel any pending
delete work before taking the inode glock. Otherwise, gfs2_cancel_delete_work
may block waiting for delete_work_func to complete, and delete_work_func may
block trying to acquire the inode glock in gfs2_inode_lookup.
Reported-by: Alexander Aring <aahringo@redhat.com>
Fixes: a0e3cc65fa29 ("gfs2: Turn gl_delete into a delayed work")
Cc: stable@vger.kernel.org # v5.8+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/inode.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index eed1a1bac6f6..65ae4fc28ede 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -150,6 +150,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (unlikely(error))
goto fail;
+ if (blktype != GFS2_BLKST_UNLINKED)
+ gfs2_cancel_delete_work(io_gl);
if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
/*
@@ -180,8 +182,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (unlikely(error))
goto fail;
- if (blktype != GFS2_BLKST_UNLINKED)
- gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
glock_set_object(ip->i_iopen_gh.gh_gl, ip);
gfs2_glock_put(io_gl);
io_gl = NULL;
@@ -725,13 +725,19 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
flush_delayed_work(&ip->i_gl->gl_work);
glock_set_object(ip->i_gl, ip);
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+ error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (error)
goto fail_free_inode;
+ gfs2_cancel_delete_work(io_gl);
+ glock_set_object(io_gl, ip);
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+ if (error)
+ goto fail_gunlock2;
error = gfs2_trans_begin(sdp, blocks, 0);
if (error)
- goto fail_free_inode;
+ goto fail_gunlock2;
if (blocks > 1) {
ip->i_eattr = ip->i_no_addr + 1;
@@ -740,18 +746,12 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
init_dinode(dip, ip, symname);
gfs2_trans_end(sdp);
- error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
- if (error)
- goto fail_free_inode;
-
BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (error)
goto fail_gunlock2;
- gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
- glock_set_object(ip->i_iopen_gh.gh_gl, ip);
gfs2_set_iop(inode);
insert_inode_hash(inode);
@@ -803,6 +803,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
fail_gunlock2:
clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
+ glock_clear_object(io_gl, ip);
gfs2_glock_put(io_gl);
fail_free_inode:
if (ip->i_gl) {
--
2.26.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [Cluster-devel] [PATCH v2] gfs2: Fix deadlock between gfs2_{create_inode, inode_lookup} and delete_work_func
@ 2020-11-30 23:26 ` Andreas Gruenbacher
0 siblings, 0 replies; 2+ messages in thread
From: Andreas Gruenbacher @ 2020-11-30 23:26 UTC (permalink / raw)
To: cluster-devel.redhat.com
In gfs2_create_inode and gfs2_inode_lookup, make sure to cancel any pending
delete work before taking the inode glock. Otherwise, gfs2_cancel_delete_work
may block waiting for delete_work_func to complete, and delete_work_func may
block trying to acquire the inode glock in gfs2_inode_lookup.
Reported-by: Alexander Aring <aahringo@redhat.com>
Fixes: a0e3cc65fa29 ("gfs2: Turn gl_delete into a delayed work")
Cc: stable at vger.kernel.org # v5.8+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/inode.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index eed1a1bac6f6..65ae4fc28ede 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -150,6 +150,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (unlikely(error))
goto fail;
+ if (blktype != GFS2_BLKST_UNLINKED)
+ gfs2_cancel_delete_work(io_gl);
if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
/*
@@ -180,8 +182,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (unlikely(error))
goto fail;
- if (blktype != GFS2_BLKST_UNLINKED)
- gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
glock_set_object(ip->i_iopen_gh.gh_gl, ip);
gfs2_glock_put(io_gl);
io_gl = NULL;
@@ -725,13 +725,19 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
flush_delayed_work(&ip->i_gl->gl_work);
glock_set_object(ip->i_gl, ip);
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+ error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (error)
goto fail_free_inode;
+ gfs2_cancel_delete_work(io_gl);
+ glock_set_object(io_gl, ip);
+
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+ if (error)
+ goto fail_gunlock2;
error = gfs2_trans_begin(sdp, blocks, 0);
if (error)
- goto fail_free_inode;
+ goto fail_gunlock2;
if (blocks > 1) {
ip->i_eattr = ip->i_no_addr + 1;
@@ -740,18 +746,12 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
init_dinode(dip, ip, symname);
gfs2_trans_end(sdp);
- error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
- if (error)
- goto fail_free_inode;
-
BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (error)
goto fail_gunlock2;
- gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
- glock_set_object(ip->i_iopen_gh.gh_gl, ip);
gfs2_set_iop(inode);
insert_inode_hash(inode);
@@ -803,6 +803,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
fail_gunlock2:
clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
+ glock_clear_object(io_gl, ip);
gfs2_glock_put(io_gl);
fail_free_inode:
if (ip->i_gl) {
--
2.26.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2020-11-30 23:28 UTC | newest]
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2020-11-30 23:26 [PATCH v2] gfs2: Fix deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func Andreas Gruenbacher
2020-11-30 23:26 ` [Cluster-devel] [PATCH v2] gfs2: Fix deadlock between gfs2_{create_inode, inode_lookup} " Andreas Gruenbacher
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