From 0f1616f6df294fe460432630850c0e0a8c30a192 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher 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 --- 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 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 Signed-off-by: Baokun Li Signed-off-by: Andreas Gruenbacher --- 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 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 Fixes: 184b4e60853d ("gfs2: Fix end-of-file handling in gfs2_page_mkwrite") Cc: stable@vger.kernel.org # v5.5+ Signed-off-by: Andreas Gruenbacher --- 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 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 Signed-off-by: Andreas Gruenbacher --- 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 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 --- 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 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf) 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 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 --- 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 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 --- 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; }