[PATCH 08/21] xfs: remove xfile_stat

Christoph Hellwig
2024-01-26T13:29:37Z

vfs_getattr is needed to query inode attributes for unknown underlying
file systems. But shmemfs is well known for users of shmem_file_setup
and shmem_read_mapping_page_gfp that rely on it not needing specific
inode revalidation and having a normal mapping. Remove the detour
through the getattr method and an extra wrapper, and just read the
inode size and i_bytes directly in the scrub tracing code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/scrub/trace.h | 34 ++++++++++------------------------
fs/xfs/scrub/xfile.c | 19 -------------------
fs/xfs/scrub/xfile.h | 7 -------
3 files changed, 10 insertions(+), 50 deletions(-)

diff --git a/fs/xfs/scrub/trace.h b/fs/xfs/scrub/trace.h
index 6bbb4e8639dca6..260b8fe0a80296 100644
--- a/fs/xfs/scrub/trace.h
+++ b/fs/xfs/scrub/trace.h
@@ -861,18 +861,11 @@ TRACE_EVENT(xfile_destroy,
__field(loff_t, size)
),
TP_fast_assign(
- struct xfile_stat statbuf;
- int ret;
-
- ret = xfile_stat(xf, &statbuf);
- if (!ret) {
- __entry->bytes = statbuf.bytes;
- __entry->size = statbuf.size;
- } else {
- __entry->bytes = -1;
- __entry->size = -1;
- }
- __entry->ino = file_inode(xf->file)->i_ino;
+ struct inode *inode = file_inode(xf->file);
+
+ __entry->ino = inode->i_ino;
+ __entry->bytes = inode->i_blocks << SECTOR_SHIFT;
+ __entry->size = i_size_read(inode);
),
TP_printk("xfino 0x%lx mem_bytes 0x%llx isize 0x%llx",
__entry->ino,
@@ -891,19 +884,12 @@ DECLARE_EVENT_CLASS(xfile_class,
__field(unsigned long long, bytecount)
),
TP_fast_assign(
- struct xfile_stat statbuf;
- int ret;
-
- ret = xfile_stat(xf, &statbuf);
- if (!ret) {
- __entry->bytes_used = statbuf.bytes;
- __entry->size = statbuf.size;
- } else {
- __entry->bytes_used = -1;
- __entry->size = -1;
- }
- __entry->ino = file_inode(xf->file)->i_ino;
+ struct inode *inode = file_inode(xf->file);
+
+ __entry->ino = inode->i_ino;
+ __entry->bytes_used = inode->i_blocks << SECTOR_SHIFT;
__entry->pos = pos;
+ __entry->size = i_size_read(inode);
__entry->bytecount = bytecount;
),
TP_printk("xfino 0x%lx mem_bytes 0x%llx pos 0x%llx bytecount 0x%llx isize 0x%llx",
diff --git a/fs/xfs/scrub/xfile.c b/fs/xfs/scrub/xfile.c
index 090c3ead43fdf1..87654cdd5ac6f9 100644
--- a/fs/xfs/scrub/xfile.c
+++ b/fs/xfs/scrub/xfile.c
@@ -291,25 +291,6 @@ xfile_seek_data(
return ret;
}

-/* Query stat information for an xfile. */
-int
-xfile_stat(
- struct xfile *xf,
- struct xfile_stat *statbuf)
-{
- struct kstat ks;
- int error;
-
- error = vfs_getattr_nosec(&xf->file->f_path, &ks,
- STATX_SIZE | STATX_BLOCKS, AT_STATX_DONT_SYNC);
- if (error)
- return error;
-
- statbuf->size = ks.size;
- statbuf->bytes = ks.blocks << SECTOR_SHIFT;
- return 0;
-}
-
/*
* Grab the (locked) page for a memory object. The object cannot span a page
* boundary. Returns 0 (and a locked page) if successful, -ENOTBLK if we
diff --git a/fs/xfs/scrub/xfile.h b/fs/xfs/scrub/xfile.h
index d56643b0f429e1..c602d11560d8ee 100644
--- a/fs/xfs/scrub/xfile.h
+++ b/fs/xfs/scrub/xfile.h
@@ -63,13 +63,6 @@ xfile_obj_store(struct xfile *xf, const void *buf, size_t count, loff_t pos)

loff_t xfile_seek_data(struct xfile *xf, loff_t pos);

-struct xfile_stat {
- loff_t size;
- unsigned long long bytes;
-};
-
-int xfile_stat(struct xfile *xf, struct xfile_stat *statbuf);
-
int xfile_get_page(struct xfile *xf, loff_t offset, unsigned int len,
struct xfile_page *xbuf);
int xfile_put_page(struct xfile *xf, struct xfile_page *xbuf);
--
2.39.2