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authorAl Viro <viro@zeniv.linux.org.uk>2022-05-22 18:38:11 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2022-06-10 23:10:23 +0300
commit164f4064ca81eefcea29f7f5dcf394f92be1d0c0 (patch)
tree5275b76d52a540bb1e9c91118e6c9510f71d3b2e /fs/file_table.c
parent91b94c5d6ae55d1161633047ffeea644b110b35f (diff)
downloadlinux-164f4064ca81eefcea29f7f5dcf394f92be1d0c0.tar.xz
keep iocb_flags() result cached in struct file
* calculate at the time we set FMODE_OPENED (do_dentry_open() for normal opens, alloc_file() for pipe()/socket()/etc.) * update when handling F_SETFL * keep in a new field - file->f_iocb_flags; since that thing is needed only before the refcount reaches zero, we can put it into the same anon union where ->f_rcuhead and ->f_llist live - those are used only after refcount reaches zero. Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/file_table.c')
-rw-r--r--fs/file_table.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/file_table.c b/fs/file_table.c
index b989e33aacda..905792b0521c 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -241,6 +241,7 @@ static struct file *alloc_file(const struct path *path, int flags,
if ((file->f_mode & FMODE_WRITE) &&
likely(fop->write || fop->write_iter))
file->f_mode |= FMODE_CAN_WRITE;
+ file->f_iocb_flags = iocb_flags(file);
file->f_mode |= FMODE_OPENED;
file->f_op = fop;
if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)