From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/fuse/file.c | 31 ++++++++++++++++++-------------
1 files changed, 18 insertions(+), 13 deletions(-)
diff --git a/kernel/fs/fuse/file.c b/kernel/fs/fuse/file.c
index 34dd646..de1cb5a 100644
--- a/kernel/fs/fuse/file.c
+++ b/kernel/fs/fuse/file.c
@@ -206,14 +206,10 @@
fi->attr_version = atomic64_inc_return(&fc->attr_version);
i_size_write(inode, 0);
spin_unlock(&fi->lock);
- truncate_pagecache(inode, 0);
fuse_invalidate_attr(inode);
if (fc->writeback_cache)
file_update_time(file);
- } else if (!(ff->open_flags & FOPEN_KEEP_CACHE)) {
- invalidate_inode_pages2(inode->i_mapping);
}
-
if ((file->f_mode & FMODE_WRITE) && fc->writeback_cache)
fuse_link_write_file(file);
}
@@ -236,30 +232,39 @@
if (err)
return err;
- if (is_wb_truncate || dax_truncate) {
+ if (is_wb_truncate || dax_truncate)
inode_lock(inode);
- fuse_set_nowrite(inode);
- }
if (dax_truncate) {
down_write(&get_fuse_inode(inode)->i_mmap_sem);
err = fuse_dax_break_layouts(inode, 0, 0);
if (err)
- goto out;
+ goto out_inode_unlock;
}
+
+ if (is_wb_truncate || dax_truncate)
+ fuse_set_nowrite(inode);
err = fuse_do_open(fm, get_node_id(inode), file, isdir);
if (!err)
fuse_finish_open(inode, file);
-out:
+ if (is_wb_truncate || dax_truncate)
+ fuse_release_nowrite(inode);
+ if (!err) {
+ struct fuse_file *ff = file->private_data;
+
+ if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC))
+ truncate_pagecache(inode, 0);
+ else if (!(ff->open_flags & FOPEN_KEEP_CACHE))
+ invalidate_inode_pages2(inode->i_mapping);
+ }
if (dax_truncate)
up_write(&get_fuse_inode(inode)->i_mmap_sem);
- if (is_wb_truncate | dax_truncate) {
- fuse_release_nowrite(inode);
+out_inode_unlock:
+ if (is_wb_truncate || dax_truncate)
inode_unlock(inode);
- }
return err;
}
@@ -784,7 +789,7 @@
struct fuse_inode *fi = get_fuse_inode(inode);
spin_lock(&fi->lock);
- if (attr_ver == fi->attr_version && size < inode->i_size &&
+ if (attr_ver >= fi->attr_version && size < inode->i_size &&
!test_bit(FUSE_I_SIZE_UNSTABLE, &fi->state)) {
fi->attr_version = atomic64_inc_return(&fc->attr_version);
i_size_write(inode, size);
--
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