[PATCH 5/7] add llseek_nowait support for xfs

Hao Xu
2023-07-26T10:27:03Z

From: Hao Xu <howeyxu@tencent.com>

Add llseek_nowait() operation for xfs, it acts just like llseek(). The
thing different is it delivers nowait parameter to iomap layer.

Signed-off-by: Hao Xu <howeyxu@tencent.com>
---
fs/xfs/xfs_file.c | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 73adc0aee2ff..cba82264221d 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1257,10 +1257,11 @@ xfs_file_readdir(
}

STATIC loff_t
-xfs_file_llseek(
+__xfs_file_llseek(
struct file *file,
loff_t offset,
- int whence)
+ int whence,
+ bool nowait)
{
struct inode *inode = file->f_mapping->host;

@@ -1282,6 +1283,28 @@ xfs_file_llseek(
return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
}

+STATIC loff_t
+xfs_file_llseek(
+ struct file *file,
+ loff_t offset,
+ int whence)
+{
+ return __xfs_file_llseek(file, offset, whence, false);
+}
+
+STATIC loff_t
+xfs_file_llseek_nowait(
+ struct file *file,
+ loff_t offset,
+ int whence,
+ bool nowait)
+{
+ if (file->f_op == &xfs_file_operations)
+ return __xfs_file_llseek(file, offset, whence, nowait);
+ else
+ return generic_file_llseek(file, offset, whence);
+}
+
#ifdef CONFIG_FS_DAX
static inline vm_fault_t
xfs_dax_fault(
@@ -1442,6 +1465,7 @@ xfs_file_mmap(

const struct file_operations xfs_file_operations = {
.llseek = xfs_file_llseek,
+ .llseek_nowait = xfs_file_llseek_nowait,
.read_iter = xfs_file_read_iter,
.write_iter = xfs_file_write_iter,
.splice_read = xfs_file_splice_read,
@@ -1467,6 +1491,7 @@ const struct file_operations xfs_dir_file_operations = {
.read = generic_read_dir,
.iterate_shared = xfs_file_readdir,
.llseek = generic_file_llseek,
+ .llseek_nowait = xfs_file_llseek_nowait,
.unlocked_ioctl = xfs_file_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = xfs_file_compat_ioctl,
--
2.25.1