[29/41] xfs: enable block size larger than page size support

Commit Message

Darrick J. Wong Oct. 31, 2024, 11:16 p.m. UTC

From: Pankaj Raghav <[e-mail]>

Source kernel commit: 7df7c204c678e24cd32d33360538670b7b90e330

Page cache now has the ability to have a minimum order when allocating
a folio which is a prerequisite to add support for block size > page
size.

Signed-off-by: Pankaj Raghav <[e-mail]>
Signed-off-by: Luis Chamberlain <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail] # fix folded
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Darrick J. Wong <[e-mail]>
Reviewed-by: Dave Chinner <[e-mail]>
Signed-off-by: Christian Brauner <[e-mail]>
---
 libxfs/init.c        |    5 +++++
 libxfs/libxfs_priv.h |    1 +
 libxfs/xfs_ialloc.c  |    5 +++++
 libxfs/xfs_shared.h  |    3 +++
 4 files changed, 14 insertions(+)

Patch

diff --git a/libxfs/init.c b/libxfs/init.c
index 1e45f091dbb5bf..733ab3f1abc557 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -22,6 +22,7 @@ 
 #include "xfs_rmap_btree.h"
 #include "xfs_refcount_btree.h"
 #include "libfrog/platform.h"
+#include "libfrog/util.h"
 #include "libxfs/xfile.h"
 #include "libxfs/buf_mem.h"
 
@@ -44,6 +45,8 @@  int	use_xfs_buf_lock;	/* global flag: use xfs_buf locks for MT */
 
 static int nextfakedev = -1;	/* device number to give to next fake device */
 
+unsigned int PAGE_SHIFT;
+
 /*
  * Checks whether a given device has a mounted, writable
  * filesystem, returns 1 if it does & fatal (just warns
@@ -257,6 +260,8 @@  libxfs_close_devices(
 int
 libxfs_init(struct libxfs_init *a)
 {
+	if (!PAGE_SHIFT)
+		PAGE_SHIFT = log2_roundup(PAGE_SIZE);
 	xfs_check_ondisk_structs();
 	xmbuf_libinit();
 	rcu_init();
diff --git a/libxfs/libxfs_priv.h b/libxfs/libxfs_priv.h
index fa025aeb09712b..97f5003ea53862 100644
--- a/libxfs/libxfs_priv.h
+++ b/libxfs/libxfs_priv.h
@@ -224,6 +224,7 @@  uint32_t get_random_u32(void);
 #endif
 
 #define PAGE_SIZE		getpagesize()
+extern unsigned int PAGE_SHIFT;
 
 #define inode_peek_iversion(inode)	(inode)->i_version
 #define inode_set_iversion_queried(inode, version) do { \
diff --git a/libxfs/xfs_ialloc.c b/libxfs/xfs_ialloc.c
index 141b2d397b1fe7..43af698fa90903 100644
--- a/libxfs/xfs_ialloc.c
+++ b/libxfs/xfs_ialloc.c
@@ -3029,6 +3029,11 @@  xfs_ialloc_setup_geometry(
 		igeo->ialloc_align = mp->m_dalign;
 	else
 		igeo->ialloc_align = 0;
+
+	if (mp->m_sb.sb_blocksize > PAGE_SIZE)
+		igeo->min_folio_order = mp->m_sb.sb_blocklog - PAGE_SHIFT;
+	else
+		igeo->min_folio_order = 0;
 }
 
 /* Compute the location of the root directory inode that is laid out by mkfs. */
diff --git a/libxfs/xfs_shared.h b/libxfs/xfs_shared.h
index 2f7413afbf46cd..33b84a3a83ff63 100644
--- a/libxfs/xfs_shared.h
+++ b/libxfs/xfs_shared.h
@@ -224,6 +224,9 @@  struct xfs_ino_geometry {
 	/* precomputed value for di_flags2 */
 	uint64_t	new_diflags2;
 
+	/* minimum folio order of a page cache allocation */
+	unsigned int	min_folio_order;
+
 };
 
 #endif /* __XFS_SHARED_H__ */