On 2024/3/20 5:23, Daeho Jeong wrote:
From: Daeho Jeong <daehoje...@google.com>
In a case writing without fallocate(), we can't guarantee it's allocated
in the conventional area for zoned stroage.
Signed-off-by: Daeho Jeong <daehoje...@google.com>
---
v2: covered the direct io case
v3: covered the mkwrite case
---
fs/f2fs/data.c | 14 ++++++++++++--
fs/f2fs/file.c | 16 ++++++++--------
2 files changed, 20 insertions(+), 10 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index c21b92f18463..d3e5ab2736a6 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1584,8 +1584,11 @@ int f2fs_map_blocks(struct inode *inode, struct
f2fs_map_blocks *map, int flag)
/* use out-place-update for direct IO under LFS mode */
if (map->m_may_create &&
- (is_hole || (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO))) {
- if (unlikely(f2fs_cp_error(sbi))) {
+ (is_hole || (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
+ !f2fs_is_pinned_file(inode)))) {
+ if (unlikely(f2fs_cp_error(sbi)) ||
+ (f2fs_is_pinned_file(inode) && is_hole &&
+ flag != F2FS_GET_BLOCK_PRE_DIO)) {
err = -EIO;
goto sync_out;
}
@@ -3378,6 +3381,8 @@ static int prepare_write_begin(struct f2fs_sb_info *sbi,
f2fs_map_lock(sbi, flag);
locked = true;
} else if ((pos & PAGE_MASK) >= i_size_read(inode)) {
+ if (f2fs_is_pinned_file(inode))
+ return -EIO;
f2fs_map_lock(sbi, flag);
locked = true;
}
@@ -3407,6 +3412,11 @@ static int prepare_write_begin(struct f2fs_sb_info *sbi,
if (!f2fs_lookup_read_extent_cache_block(inode, index,
&dn.data_blkaddr)) {
+ if (f2fs_is_pinned_file(inode)) {
+ err = -EIO;
+ goto out;
+ }
+
if (locked) {
err = f2fs_reserve_block(&dn, index);
goto out;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 82277e95c88f..4db3b21c804b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -57,7 +57,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
struct inode *inode = file_inode(vmf->vma->vm_file);
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dnode_of_data dn;
- bool need_alloc = true;
+ bool need_alloc = !f2fs_is_pinned_file(inode);
Will this check races w/ pinfile get|set?
Thanks,
int err = 0;
vm_fault_t ret;
@@ -114,19 +114,15 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
goto out_sem;
}
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
if (need_alloc) {
/* block allocation */
- set_new_dnode(&dn, inode, NULL, NULL, 0);
err = f2fs_get_block_locked(&dn, page->index);
- }
-
-#ifdef CONFIG_F2FS_FS_COMPRESSION
- if (!need_alloc) {
- set_new_dnode(&dn, inode, NULL, NULL, 0);
+ } else {
err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
f2fs_put_dnode(&dn);
}
-#endif
+
if (err) {
unlock_page(page);
goto out_sem;
@@ -4611,6 +4607,10 @@ static int f2fs_preallocate_blocks(struct kiocb *iocb,
struct iov_iter *iter,
return ret;
}
+ /* For pinned files, it should be fallocate()-ed in advance. */
+ if (f2fs_is_pinned_file(inode))
+ return 0;
+
/* Do not preallocate blocks that will be written partially in 4KB. */
map.m_lblk = F2FS_BLK_ALIGN(pos);
map.m_len = F2FS_BYTES_TO_BLK(pos + count);
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
