From 0f1616f6df294fe460432630850c0e0a8c30a192 Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Thu, 20 May 2021 14:52:46 +0200
Subject: [PATCH 1/7] gfs2: Fix do_gfs2_set_flags description
Commit 88b631cbfbeb ("gfs2: convert to fileattr") changed the argument list
without updating the description.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 493a83e3f590..7b757195fd97 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -210,7 +210,7 @@ void gfs2_set_inode_flags(struct inode *inode)
/**
* do_gfs2_set_flags - set flags on an inode
- * @filp: file pointer
+ * @inode: The inode
* @reqflags: The flags to set
* @mask: Indicates which flags are valid
* @fsflags: The FS_* inode flags passed in
From 38a618dbf47f837f11df01052977dcaf31c5c2a8 Mon Sep 17 00:00:00 2001
From: Baokun Li <libaokun1@huawei.com>
Date: Tue, 8 Jun 2021 11:12:44 +0800
Subject: [PATCH 2/7] gfs2: Use list_move_tail instead of
list_del/list_add_tail
Using list_move_tail() instead of list_del() + list_add_tail().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/glock.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index d9cb261f55b0..1f3902ecdded 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -212,8 +212,7 @@ void gfs2_glock_add_to_lru(struct gfs2_glock *gl)
spin_lock(&lru_lock);
- list_del(&gl->gl_lru);
- list_add_tail(&gl->gl_lru, &lru_list);
+ list_move_tail(&gl->gl_lru, &lru_list);
if (!test_bit(GLF_LRU, &gl->gl_flags)) {
set_bit(GLF_LRU, &gl->gl_flags);
From d3c51c55cb9274dd43c156f1f26b5eb4d5f2d58c Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Mon, 21 Jun 2021 22:28:50 +0200
Subject: [PATCH 3/7] gfs2: Fix underflow in gfs2_page_mkwrite
On filesystems with a block size smaller than PAGE_SIZE and non-empty
files smaller then PAGE_SIZE, gfs2_page_mkwrite could end up allocating
excess blocks beyond the end of the file, similar to fallocate. This
doesn't make sense; fix it.
Reported-by: Bob Peterson <rpeterso@redhat.com>
Fixes: 184b4e60853d ("gfs2: Fix end-of-file handling in gfs2_page_mkwrite")
Cc: stable@vger.kernel.org # v5.5+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/file.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 7b757195fd97..37041873bb95 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -450,8 +450,8 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
file_update_time(vmf->vma->vm_file);
/* page is wholly or partially inside EOF */
- if (offset > size - PAGE_SIZE)
- length = offset_in_page(size);
+ if (size - offset < PAGE_SIZE)
+ length = size - offset;
else
length = PAGE_SIZE;
From 5d49d3508b3c67201bd3e1bf7f4ef049111b7051 Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Mon, 28 Jun 2021 19:14:50 +0800
Subject: [PATCH 4/7] gfs2: Fix error handling in init_statfs
On an error path, init_statfs calls iput(pn) after pn has already been put.
Fix that by setting pn to NULL after the initial iput.
Fixes: 97fd734ba17e ("gfs2: lookup local statfs inodes prior to journal recovery")
Cc: stable@vger.kernel.org # v5.10+
Reported-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/ops_fstype.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 826f77d9cff5..5f4504dd0875 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -687,6 +687,7 @@ static int init_statfs(struct gfs2_sbd *sdp)
}
iput(pn);
+ pn = NULL;
ip = GFS2_I(sdp->sd_sc_inode);
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
&sdp->sd_sc_gh);
From 0fc3bcd6b6e34281254658bef27c45ec8c19e50c Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Thu, 13 May 2021 14:30:31 +0200
Subject: [PATCH 5/7] gfs2: Clean up the error handling in gfs2_page_mkwrite
We're setting an error number so that block_page_mkwrite_return
translates it into the corresponding VM_FAULT_* code in several places,
but this is getting confusing, so set the VM_FAULT_* codes directly
instead. (No change in functionality.)
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/file.c | 63 ++++++++++++++++++++++++++++++++------------------
1 file changed, 40 insertions(+), 23 deletions(-)
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 37041873bb95..cf16d61f46ec 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -427,22 +427,25 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
struct gfs2_alloc_parms ap = { .aflags = 0, };
u64 offset = page_offset(page);
unsigned int data_blocks, ind_blocks, rblocks;
+ vm_fault_t ret = VM_FAULT_LOCKED;
struct gfs2_holder gh;
unsigned int length;
loff_t size;
- int ret;
+ int err;
sb_start_pagefault(inode->i_sb);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
- ret = gfs2_glock_nq(&gh);
- if (ret)
+ err = gfs2_glock_nq(&gh);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
goto out_uninit;
+ }
/* Check page index against inode size */
size = i_size_read(inode);
if (offset >= size) {
- ret = -EINVAL;
+ ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
@@ -469,24 +472,30 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
!gfs2_write_alloc_required(ip, offset, length)) {
lock_page(page);
if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
- ret = -EAGAIN;
+ ret = VM_FAULT_NOPAGE;
unlock_page(page);
}
goto out_unlock;
}
- ret = gfs2_rindex_update(sdp);
- if (ret)
+ err = gfs2_rindex_update(sdp);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
goto out_unlock;
+ }
gfs2_write_calc_reserv(ip, length, &data_blocks, &ind_blocks);
ap.target = data_blocks + ind_blocks;
- ret = gfs2_quota_lock_check(ip, &ap);
- if (ret)
+ err = gfs2_quota_lock_check(ip, &ap);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
goto out_unlock;
- ret = gfs2_inplace_reserve(ip, &ap);
- if (ret)
+ }
+ err = gfs2_inplace_reserve(ip, &ap);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
goto out_quota_unlock;
+ }
rblocks = RES_DINODE + ind_blocks;
if (gfs2_is_jdata(ip))
@@ -495,27 +504,35 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
rblocks += RES_STATFS + RES_QUOTA;
rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks);
}
- ret = gfs2_trans_begin(sdp, rblocks, 0);
- if (ret)
+ err = gfs2_trans_begin(sdp, rblocks, 0);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
goto out_trans_fail;
+ }
lock_page(page);
- ret = -EAGAIN;
/* If truncated, we must retry the operation, we may have raced
* with the glock demotion code.
*/
- if (!PageUptodate(page) || page->mapping != inode->i_mapping)
+ if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
+ ret = VM_FAULT_NOPAGE;
goto out_trans_end;
+ }
/* Unstuff, if required, and allocate backing blocks for page */
- ret = 0;
- if (gfs2_is_stuffed(ip))
- ret = gfs2_unstuff_dinode(ip, page);
- if (ret == 0)
- ret = gfs2_allocate_page_backing(page, length);
+ if (gfs2_is_stuffed(ip)) {
+ err = gfs2_unstuff_dinode(ip, page);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
+ goto out_trans_end;
+ }
+ }
+ err = gfs2_allocate_page_backing(page, length);
+ if (err)
+ ret = block_page_mkwrite_return(err);
out_trans_end:
- if (ret)
+ if (ret != VM_FAULT_LOCKED)
unlock_page(page);
gfs2_trans_end(sdp);
out_trans_fail:
@@ -526,12 +543,12 @@ out_unlock:
gfs2_glock_dq(&gh);
out_uninit:
gfs2_holder_uninit(&gh);
- if (ret == 0) {
+ if (ret == VM_FAULT_LOCKED) {
set_page_dirty(page);
wait_for_stable_page(page);
}
sb_end_pagefault(inode->i_sb);
- return block_page_mkwrite_return(ret);
+ return ret;
}
static vm_fault_t gfs2_fault(struct vm_fault *vmf)
From 64090cbe4bff240e9a5266e956fcaf449ea6b327 Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Thu, 17 Jun 2021 23:04:14 +0200
Subject: [PATCH 6/7] gfs2: Unstuff before locking page in gfs2_page_mkwrite
In gfs2_page_mkwrite, unstuff inodes before locking the page. That
way, we won't have to pass in the locked page to gfs2_unstuff_inode,
and gfs2_unstuff_inode can look up and lock the page itself.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/file.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index cf16d61f46ec..4a14616b2c0a 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -510,30 +510,32 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
goto out_trans_fail;
}
+ /* Unstuff, if required, and allocate backing blocks for page */
+ if (gfs2_is_stuffed(ip)) {
+ err = gfs2_unstuff_dinode(ip, NULL);
+ if (err) {
+ ret = block_page_mkwrite_return(err);
+ goto out_trans_end;
+ }
+ }
+
lock_page(page);
/* If truncated, we must retry the operation, we may have raced
* with the glock demotion code.
*/
if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
ret = VM_FAULT_NOPAGE;
- goto out_trans_end;
+ goto out_page_locked;
}
- /* Unstuff, if required, and allocate backing blocks for page */
- if (gfs2_is_stuffed(ip)) {
- err = gfs2_unstuff_dinode(ip, page);
- if (err) {
- ret = block_page_mkwrite_return(err);
- goto out_trans_end;
- }
- }
err = gfs2_allocate_page_backing(page, length);
if (err)
ret = block_page_mkwrite_return(err);
-out_trans_end:
+out_page_locked:
if (ret != VM_FAULT_LOCKED)
unlock_page(page);
+out_trans_end:
gfs2_trans_end(sdp);
out_trans_fail:
gfs2_inplace_release(ip);
From 7a607a41cdc6c6f27b8e234cb44ce57070513dac Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Thu, 17 Jun 2021 21:36:50 +0200
Subject: [PATCH 7/7] gfs2: Clean up gfs2_unstuff_dinode
Split __gfs2_unstuff_inode off from gfs2_unstuff_dinode and clean up the
code a little. All remaining callers now pass NULL as the page argument
of gfs2_unstuff_dinode, so remove that argument.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/gfs2/bmap.c | 62 ++++++++++++++++++++++++-------------------------
fs/gfs2/bmap.h | 2 +-
fs/gfs2/dir.c | 2 +-
fs/gfs2/file.c | 4 ++--
fs/gfs2/quota.c | 2 +-
5 files changed, 36 insertions(+), 36 deletions(-)
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 0bcf11a9987b..ed8b67b21718 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -56,14 +56,6 @@ static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,
u64 block, struct page *page)
{
struct inode *inode = &ip->i_inode;
- int release = 0;
-
- if (!page || page->index) {
- page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
- if (!page)
- return -ENOMEM;
- release = 1;
- }
if (!PageUptodate(page)) {
void *kaddr = kmap(page);
@@ -97,26 +89,10 @@ static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,
gfs2_ordered_add_inode(ip);
}
- if (release) {
- unlock_page(page);
- put_page(page);
- }
-
return 0;
}
-/**
- * gfs2_unstuff_dinode - Unstuff a dinode when the data has grown too big
- * @ip: The GFS2 inode to unstuff
- * @page: The (optional) page. This is looked up if the @page is NULL
- *
- * This routine unstuffs a dinode and returns it to a "normal" state such
- * that the height can be grown in the traditional way.
- *
- * Returns: errno
- */
-
-int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
+static int __gfs2_unstuff_inode(struct gfs2_inode *ip, struct page *page)
{
struct buffer_head *bh, *dibh;
struct gfs2_dinode *di;
@@ -124,11 +100,9 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
int isdir = gfs2_is_dir(ip);
int error;
- down_write(&ip->i_rw_mutex);
-
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
- goto out;
+ return error;
if (i_size_read(&ip->i_inode)) {
/* Get a free block, fill it with the stuffed data,
@@ -170,12 +144,38 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
out_brelse:
brelse(dibh);
+ return error;
+}
+
+/**
+ * gfs2_unstuff_dinode - Unstuff a dinode when the data has grown too big
+ * @ip: The GFS2 inode to unstuff
+ *
+ * This routine unstuffs a dinode and returns it to a "normal" state such
+ * that the height can be grown in the traditional way.
+ *
+ * Returns: errno
+ */
+
+int gfs2_unstuff_dinode(struct gfs2_inode *ip)
+{
+ struct inode *inode = &ip->i_inode;
+ struct page *page;
+ int error;
+
+ down_write(&ip->i_rw_mutex);
+ page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
+ error = -ENOMEM;
+ if (!page)
+ goto out;
+ error = __gfs2_unstuff_inode(ip, page);
+ unlock_page(page);
+ put_page(page);
out:
up_write(&ip->i_rw_mutex);
return error;
}
-
/**
* find_metapath - Find path through the metadata tree
* @sdp: The superblock
@@ -1079,7 +1079,7 @@ static int gfs2_iomap_begin_write(struct inode *inode, loff_t pos,
goto out_trans_fail;
if (unstuff) {
- ret = gfs2_unstuff_dinode(ip, NULL);
+ ret = gfs2_unstuff_dinode(ip);
if (ret)
goto out_trans_end;
release_metapath(mp);
@@ -2143,7 +2143,7 @@ static int do_grow(struct inode *inode, u64 size)
goto do_grow_release;
if (unstuff) {
- error = gfs2_unstuff_dinode(ip, NULL);
+ error = gfs2_unstuff_dinode(ip);
if (error)
goto do_end_trans;
}
diff --git a/fs/gfs2/bmap.h b/fs/gfs2/bmap.h
index 6676d863faef..53cce6c08e81 100644
--- a/fs/gfs2/bmap.h
+++ b/fs/gfs2/bmap.h
@@ -46,7 +46,7 @@ static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip,
extern const struct iomap_ops gfs2_iomap_ops;
extern const struct iomap_writeback_ops gfs2_writeback_ops;
-extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page);
+extern int gfs2_unstuff_dinode(struct gfs2_inode *ip);
extern int gfs2_block_map(struct inode *inode, sector_t lblock,
struct buffer_head *bh, int create);
extern int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 18f67b37d6f8..42b7dfffb5e7 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -172,7 +172,7 @@ static int gfs2_dir_write_data(struct gfs2_inode *ip, const char *buf,
return -EINVAL;
if (gfs2_is_stuffed(ip)) {
- error = gfs2_unstuff_dinode(ip, NULL);
+ error = gfs2_unstuff_dinode(ip);
if (error)
return error;
}
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 4a14616b2c0a..84ec053d43b4 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -512,7 +512,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
/* Unstuff, if required, and allocate backing blocks for page */
if (gfs2_is_stuffed(ip)) {
- err = gfs2_unstuff_dinode(ip, NULL);
+ err = gfs2_unstuff_dinode(ip);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_trans_end;
@@ -981,7 +981,7 @@ static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
gfs2_trans_add_meta(ip->i_gl, dibh);
if (gfs2_is_stuffed(ip)) {
- error = gfs2_unstuff_dinode(ip, NULL);
+ error = gfs2_unstuff_dinode(ip);
if (unlikely(error))
goto out;
}
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 94637c307cc8..be0997e24d60 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -825,7 +825,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
u64 size;
if (gfs2_is_stuffed(ip)) {
- err = gfs2_unstuff_dinode(ip, NULL);
+ err = gfs2_unstuff_dinode(ip);
if (err)
return err;
}