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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2022-05-22 11:38:11 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2022-06-10 16:10:23 -0400 |
| commit | 164f4064ca81eefcea29f7f5dcf394f92be1d0c0 (patch) | |
| tree | 5275b76d52a540bb1e9c91118e6c9510f71d3b2e | |
| parent | iocb: delay evaluation of IS_SYNC(...) until we want to check IOCB_DSYNC (diff) | |
| download | linux-dev-164f4064ca81eefcea29f7f5dcf394f92be1d0c0.tar.xz linux-dev-164f4064ca81eefcea29f7f5dcf394f92be1d0c0.zip | |
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>
| -rw-r--r-- | drivers/nvme/target/io-cmd-file.c | 2 | ||||
| -rw-r--r-- | fs/aio.c | 2 | ||||
| -rw-r--r-- | fs/fcntl.c | 1 | ||||
| -rw-r--r-- | fs/file_table.c | 1 | ||||
| -rw-r--r-- | fs/io_uring.c | 2 | ||||
| -rw-r--r-- | fs/open.c | 1 | ||||
| -rw-r--r-- | include/linux/fs.h | 5 |
7 files changed, 8 insertions, 6 deletions
diff --git a/drivers/nvme/target/io-cmd-file.c b/drivers/nvme/target/io-cmd-file.c index f3d58abf11e0..64b47e2a4633 100644 --- a/drivers/nvme/target/io-cmd-file.c +++ b/drivers/nvme/target/io-cmd-file.c @@ -112,7 +112,7 @@ static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, iocb->ki_pos = pos; iocb->ki_filp = req->ns->file; - iocb->ki_flags = ki_flags | iocb_flags(req->ns->file); + iocb->ki_flags = ki_flags | iocb->ki_filp->f_iocb_flags; return call_iter(iocb, &iter); } @@ -1475,7 +1475,7 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb) req->ki_complete = aio_complete_rw; req->private = NULL; req->ki_pos = iocb->aio_offset; - req->ki_flags = iocb_flags(req->ki_filp); + req->ki_flags = req->ki_filp->f_iocb_flags; if (iocb->aio_flags & IOCB_FLAG_RESFD) req->ki_flags |= IOCB_EVENTFD; if (iocb->aio_flags & IOCB_FLAG_IOPRIO) { diff --git a/fs/fcntl.c b/fs/fcntl.c index 34a3faa4886d..146c9ab0cd4b 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -78,6 +78,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg) } spin_lock(&filp->f_lock); filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK); + filp->f_iocb_flags = iocb_flags(filp); spin_unlock(&filp->f_lock); out: 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) diff --git a/fs/io_uring.c b/fs/io_uring.c index 3aab4182fd89..53424b1f019f 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -4330,7 +4330,7 @@ static int io_rw_init_file(struct io_kiocb *req, fmode_t mode) if (!io_req_ffs_set(req)) req->flags |= io_file_get_flags(file) << REQ_F_SUPPORT_NOWAIT_BIT; - kiocb->ki_flags = iocb_flags(file); + kiocb->ki_flags = file->f_iocb_flags; ret = kiocb_set_rw_flags(kiocb, req->rw.flags); if (unlikely(ret)) return ret; diff --git a/fs/open.c b/fs/open.c index 1d57fbde2feb..d80441a0bf17 100644 --- a/fs/open.c +++ b/fs/open.c @@ -862,6 +862,7 @@ static int do_dentry_open(struct file *f, f->f_mode |= FMODE_CAN_ODIRECT; f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); + f->f_iocb_flags = iocb_flags(f); file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping); diff --git a/include/linux/fs.h b/include/linux/fs.h index 380a1292f4f9..c82b9d442f56 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -926,6 +926,7 @@ struct file { union { struct llist_node f_llist; struct rcu_head f_rcuhead; + unsigned int f_iocb_flags; }; struct path f_path; struct inode *f_inode; /* cached value */ @@ -2199,13 +2200,11 @@ static inline bool HAS_UNMAPPED_ID(struct user_namespace *mnt_userns, !gid_valid(i_gid_into_mnt(mnt_userns, inode)); } -static inline int iocb_flags(struct file *file); - static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp) { *kiocb = (struct kiocb) { .ki_filp = filp, - .ki_flags = iocb_flags(filp), + .ki_flags = filp->f_iocb_flags, .ki_ioprio = get_current_ioprio(), }; } |