Message ID | 20210423173018.23133-7-jack@suse.cz (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | fs: Hole punch vs page cache filling races | expand |
Hi Jan, I love your patch! Yet something to improve: [auto build test ERROR on ext4/dev] [also build test ERROR on fuse/for-next linus/master v5.12-rc8] [cannot apply to hnaz-linux-mm/master next-20210423] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jan-Kara/fs-Hole-punch-vs-page-cache-filling-races/20210424-013114 base: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev config: m68k-randconfig-m031-20210423 (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/7a9e8e67e7f7d0070294e9f0a3567a3f28985383 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jan-Kara/fs-Hole-punch-vs-page-cache-filling-races/20210424-013114 git checkout 7a9e8e67e7f7d0070294e9f0a3567a3f28985383 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com> All errors (new ones prefixed by >>): fs/f2fs/file.c: In function 'f2fs_release_compress_blocks': >> fs/f2fs/file.c:3567:14: error: 'mapping' undeclared (first use in this function) 3567 | down_write(&mapping->invalidate_lock); | ^~~~~~~ fs/f2fs/file.c:3567:14: note: each undeclared identifier is reported only once for each function it appears in vim +/mapping +3567 fs/f2fs/file.c 3515 3516 static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) 3517 { 3518 struct inode *inode = file_inode(filp); 3519 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3520 pgoff_t page_idx = 0, last_idx; 3521 unsigned int released_blocks = 0; 3522 int ret; 3523 int writecount; 3524 3525 if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) 3526 return -EOPNOTSUPP; 3527 3528 if (!f2fs_compressed_file(inode)) 3529 return -EINVAL; 3530 3531 if (f2fs_readonly(sbi->sb)) 3532 return -EROFS; 3533 3534 ret = mnt_want_write_file(filp); 3535 if (ret) 3536 return ret; 3537 3538 f2fs_balance_fs(F2FS_I_SB(inode), true); 3539 3540 inode_lock(inode); 3541 3542 writecount = atomic_read(&inode->i_writecount); 3543 if ((filp->f_mode & FMODE_WRITE && writecount != 1) || 3544 (!(filp->f_mode & FMODE_WRITE) && writecount)) { 3545 ret = -EBUSY; 3546 goto out; 3547 } 3548 3549 if (IS_IMMUTABLE(inode)) { 3550 ret = -EINVAL; 3551 goto out; 3552 } 3553 3554 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); 3555 if (ret) 3556 goto out; 3557 3558 F2FS_I(inode)->i_flags |= F2FS_IMMUTABLE_FL; 3559 f2fs_set_inode_flags(inode); 3560 inode->i_ctime = current_time(inode); 3561 f2fs_mark_inode_dirty_sync(inode, true); 3562 3563 if (!atomic_read(&F2FS_I(inode)->i_compr_blocks)) 3564 goto out; 3565 3566 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); > 3567 down_write(&mapping->invalidate_lock); 3568 3569 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 3570 3571 while (page_idx < last_idx) { 3572 struct dnode_of_data dn; 3573 pgoff_t end_offset, count; 3574 3575 set_new_dnode(&dn, inode, NULL, NULL, 0); 3576 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE); 3577 if (ret) { 3578 if (ret == -ENOENT) { 3579 page_idx = f2fs_get_next_page_offset(&dn, 3580 page_idx); 3581 ret = 0; 3582 continue; 3583 } 3584 break; 3585 } 3586 3587 end_offset = ADDRS_PER_PAGE(dn.node_page, inode); 3588 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); 3589 count = round_up(count, F2FS_I(inode)->i_cluster_size); 3590 3591 ret = release_compress_blocks(&dn, count); 3592 3593 f2fs_put_dnode(&dn); 3594 3595 if (ret < 0) 3596 break; 3597 3598 page_idx += count; 3599 released_blocks += ret; 3600 } 3601 3602 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 3603 up_write(&mapping->invalidate_lock); 3604 out: 3605 inode_unlock(inode); 3606 3607 mnt_drop_write_file(filp); 3608 3609 if (ret >= 0) { 3610 ret = put_user(released_blocks, (u64 __user *)arg); 3611 } else if (released_blocks && 3612 atomic_read(&F2FS_I(inode)->i_compr_blocks)) { 3613 set_sbi_flag(sbi, SBI_NEED_FSCK); 3614 f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx " 3615 "iblocks=%llu, released=%u, compr_blocks=%u, " 3616 "run fsck to fix.", 3617 __func__, inode->i_ino, inode->i_blocks, 3618 released_blocks, 3619 atomic_read(&F2FS_I(inode)->i_compr_blocks)); 3620 } 3621 3622 return ret; 3623 } 3624 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Hi Jan, I love your patch! Yet something to improve: [auto build test ERROR on ext4/dev] [also build test ERROR on fuse/for-next linus/master v5.12-rc8] [cannot apply to hnaz-linux-mm/master next-20210423] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jan-Kara/fs-Hole-punch-vs-page-cache-filling-races/20210424-013114 base: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev config: arm-randconfig-r031-20210423 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 06234f758e1945084582cf80450b396f75a9c06e) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/7a9e8e67e7f7d0070294e9f0a3567a3f28985383 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jan-Kara/fs-Hole-punch-vs-page-cache-filling-races/20210424-013114 git checkout 7a9e8e67e7f7d0070294e9f0a3567a3f28985383 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com> All errors (new ones prefixed by >>): >> fs/f2fs/file.c:3567:14: error: use of undeclared identifier 'mapping' down_write(&mapping->invalidate_lock); ^ fs/f2fs/file.c:3603:12: error: use of undeclared identifier 'mapping' up_write(&mapping->invalidate_lock); ^ 2 errors generated. vim +/mapping +3567 fs/f2fs/file.c 3515 3516 static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) 3517 { 3518 struct inode *inode = file_inode(filp); 3519 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3520 pgoff_t page_idx = 0, last_idx; 3521 unsigned int released_blocks = 0; 3522 int ret; 3523 int writecount; 3524 3525 if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) 3526 return -EOPNOTSUPP; 3527 3528 if (!f2fs_compressed_file(inode)) 3529 return -EINVAL; 3530 3531 if (f2fs_readonly(sbi->sb)) 3532 return -EROFS; 3533 3534 ret = mnt_want_write_file(filp); 3535 if (ret) 3536 return ret; 3537 3538 f2fs_balance_fs(F2FS_I_SB(inode), true); 3539 3540 inode_lock(inode); 3541 3542 writecount = atomic_read(&inode->i_writecount); 3543 if ((filp->f_mode & FMODE_WRITE && writecount != 1) || 3544 (!(filp->f_mode & FMODE_WRITE) && writecount)) { 3545 ret = -EBUSY; 3546 goto out; 3547 } 3548 3549 if (IS_IMMUTABLE(inode)) { 3550 ret = -EINVAL; 3551 goto out; 3552 } 3553 3554 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); 3555 if (ret) 3556 goto out; 3557 3558 F2FS_I(inode)->i_flags |= F2FS_IMMUTABLE_FL; 3559 f2fs_set_inode_flags(inode); 3560 inode->i_ctime = current_time(inode); 3561 f2fs_mark_inode_dirty_sync(inode, true); 3562 3563 if (!atomic_read(&F2FS_I(inode)->i_compr_blocks)) 3564 goto out; 3565 3566 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); > 3567 down_write(&mapping->invalidate_lock); 3568 3569 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 3570 3571 while (page_idx < last_idx) { 3572 struct dnode_of_data dn; 3573 pgoff_t end_offset, count; 3574 3575 set_new_dnode(&dn, inode, NULL, NULL, 0); 3576 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE); 3577 if (ret) { 3578 if (ret == -ENOENT) { 3579 page_idx = f2fs_get_next_page_offset(&dn, 3580 page_idx); 3581 ret = 0; 3582 continue; 3583 } 3584 break; 3585 } 3586 3587 end_offset = ADDRS_PER_PAGE(dn.node_page, inode); 3588 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); 3589 count = round_up(count, F2FS_I(inode)->i_cluster_size); 3590 3591 ret = release_compress_blocks(&dn, count); 3592 3593 f2fs_put_dnode(&dn); 3594 3595 if (ret < 0) 3596 break; 3597 3598 page_idx += count; 3599 released_blocks += ret; 3600 } 3601 3602 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 3603 up_write(&mapping->invalidate_lock); 3604 out: 3605 inode_unlock(inode); 3606 3607 mnt_drop_write_file(filp); 3608 3609 if (ret >= 0) { 3610 ret = put_user(released_blocks, (u64 __user *)arg); 3611 } else if (released_blocks && 3612 atomic_read(&F2FS_I(inode)->i_compr_blocks)) { 3613 set_sbi_flag(sbi, SBI_NEED_FSCK); 3614 f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx " 3615 "iblocks=%llu, released=%u, compr_blocks=%u, " 3616 "run fsck to fix.", 3617 __func__, inode->i_ino, inode->i_blocks, 3618 released_blocks, 3619 atomic_read(&F2FS_I(inode)->i_compr_blocks)); 3620 } 3621 3622 return ret; 3623 } 3624 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 4e5257c763d0..932c773b7b97 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3154,12 +3154,12 @@ static void f2fs_write_failed(struct address_space *mapping, loff_t to) /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */ if (to > i_size && !f2fs_verity_in_progress(inode)) { down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_pagecache(inode, i_size); f2fs_truncate_blocks(inode, i_size, true); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); } } diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e2d302ae3a46..f9010c69a57e 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -742,7 +742,6 @@ struct f2fs_inode_info { /* avoid racing between foreground op and gc */ struct rw_semaphore i_gc_rwsem[2]; - struct rw_semaphore i_mmap_sem; struct rw_semaphore i_xattr_sem; /* avoid racing between reading and changing EAs */ int i_extra_isize; /* size of extra space located in i_addr */ diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index d26ff2ae3f5e..e58d67a264ac 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -37,10 +37,7 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf) struct inode *inode = file_inode(vmf->vma->vm_file); vm_fault_t ret; - down_read(&F2FS_I(inode)->i_mmap_sem); ret = filemap_fault(vmf); - up_read(&F2FS_I(inode)->i_mmap_sem); - if (!ret) f2fs_update_iostat(F2FS_I_SB(inode), APP_MAPPED_READ_IO, F2FS_BLKSIZE); @@ -101,7 +98,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); file_update_time(vmf->vma->vm_file); - down_read(&F2FS_I(inode)->i_mmap_sem); + down_read(&inode->i_mapping->invalidate_lock); lock_page(page); if (unlikely(page->mapping != inode->i_mapping || page_offset(page) > i_size_read(inode) || @@ -160,7 +157,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) trace_f2fs_vm_page_mkwrite(page, DATA); out_sem: - up_read(&F2FS_I(inode)->i_mmap_sem); + up_read(&inode->i_mapping->invalidate_lock); sb_end_pagefault(inode->i_sb); err: @@ -941,7 +938,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, } down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); truncate_setsize(inode, attr->ia_size); @@ -951,7 +948,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, * do not trim all blocks after i_size if target size is * larger than i_size. */ - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); if (err) return err; @@ -1094,7 +1091,7 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len) blk_end = (loff_t)pg_end << PAGE_SHIFT; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_inode_pages_range(mapping, blk_start, blk_end - 1); @@ -1103,7 +1100,7 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len) ret = f2fs_truncate_hole(inode, pg_start, pg_end); f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); } } @@ -1338,7 +1335,7 @@ static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len) /* avoid gc operation during block exchange */ down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); f2fs_lock_op(sbi); f2fs_drop_extent_tree(inode); @@ -1346,7 +1343,7 @@ static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len) ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true); f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); return ret; } @@ -1377,13 +1374,13 @@ static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) return ret; /* write out all moved pages, if possible */ - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); truncate_pagecache(inode, offset); new_size = i_size_read(inode) - len; ret = f2fs_truncate_blocks(inode, new_size, true); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); if (!ret) f2fs_i_size_write(inode, new_size); return ret; @@ -1483,7 +1480,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, pgoff_t end; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_pagecache_range(inode, (loff_t)index << PAGE_SHIFT, @@ -1495,7 +1492,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE); if (ret) { f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); goto out; } @@ -1507,7 +1504,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, f2fs_put_dnode(&dn); f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); f2fs_balance_fs(sbi, dn.node_changed); @@ -1542,6 +1539,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct address_space *mapping = inode->i_mapping; pgoff_t nr, pg_start, pg_end, delta, idx; loff_t new_size; int ret = 0; @@ -1564,14 +1562,14 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) f2fs_balance_fs(sbi, true); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); ret = f2fs_truncate_blocks(inode, i_size_read(inode), true); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); if (ret) return ret; /* write out all dirty pages from offset */ - ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); + ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX); if (ret) return ret; @@ -1582,7 +1580,7 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) /* avoid gc operation during block exchange */ down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_pagecache(inode, offset); while (!ret && idx > pg_start) { @@ -1598,14 +1596,14 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) idx + delta, nr, false); f2fs_unlock_op(sbi); } - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); /* write out all moved pages, if possible */ - down_write(&F2FS_I(inode)->i_mmap_sem); - filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); + down_write(&mapping->invalidate_lock); + filemap_write_and_wait_range(mapping, offset, LLONG_MAX); truncate_pagecache(inode, offset); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); if (!ret) f2fs_i_size_write(inode, new_size); @@ -3566,7 +3564,7 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) goto out; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); @@ -3602,7 +3600,7 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) } up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); out: inode_unlock(inode); @@ -3719,7 +3717,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) } down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); @@ -3755,7 +3753,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) } up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); if (ret >= 0) { F2FS_I(inode)->i_flags &= ~F2FS_IMMUTABLE_FL; @@ -3875,7 +3873,7 @@ static int f2fs_sec_trim_file(struct file *filp, unsigned long arg) goto err; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); ret = filemap_write_and_wait_range(mapping, range.start, to_end ? LLONG_MAX : end_addr - 1); @@ -3962,7 +3960,7 @@ static int f2fs_sec_trim_file(struct file *filp, unsigned long arg) ret = f2fs_secure_erase(prev_bdev, inode, prev_index, prev_block, len, range.flags); out: - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); err: inode_unlock(inode); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 82592b19b4e0..c6ade37338ed 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1176,7 +1176,6 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) mutex_init(&fi->inmem_lock); init_rwsem(&fi->i_gc_rwsem[READ]); init_rwsem(&fi->i_gc_rwsem[WRITE]); - init_rwsem(&fi->i_mmap_sem); init_rwsem(&fi->i_xattr_sem); /* Will be used by directory only */
Use invalidate_lock instead of f2fs' private i_mmap_sem. The intended purpose is exactly the same. By this conversion we fix a long standing race between hole punching and read(2) / readahead(2) paths that can lead to stale page cache contents. CC: Jaegeuk Kim <jaegeuk@kernel.org> CC: Chao Yu <yuchao0@huawei.com> CC: linux-f2fs-devel@lists.sourceforge.net Signed-off-by: Jan Kara <jack@suse.cz> --- fs/f2fs/data.c | 4 ++-- fs/f2fs/f2fs.h | 1 - fs/f2fs/file.c | 58 ++++++++++++++++++++++++------------------------- fs/f2fs/super.c | 1 - 4 files changed, 30 insertions(+), 34 deletions(-)