[RFC PATCH 3/5] fs: add a write stream field to the inode
From: Kanchan Joshi <hidden>
Date: 2025-07-29 14:53:47
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
Prepare for supporting per-inode write streams. Part of the existing 32-bit hole is used for the new field. Signed-off-by: Kanchan Joshi <redacted> --- fs/inode.c | 1 + include/linux/fs.h | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/inode.c b/fs/inode.c
index 01ebdc40021e..bb1a9a043b32 100644
--- a/fs/inode.c
+++ b/fs/inode.c@@ -250,6 +250,7 @@ int inode_init_always_gfp(struct super_block *sb, struct inode *inode, gfp_t gfp atomic_set(&inode->i_writecount, 0); inode->i_size = 0; inode->i_write_hint = WRITE_LIFE_NOT_SET; + inode->i_write_stream = 0; inode->i_blocks = 0; inode->i_bytes = 0; inode->i_generation = 0;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b1d514901bf8..3c41ce0f641c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h@@ -725,7 +725,8 @@ struct inode { /* Misc */ u32 i_state; - /* 32-bit hole */ + u8 i_write_stream; + /* 24-bit hole */ struct rw_semaphore i_rwsem; unsigned long dirtied_when; /* jiffies of first dirtying */
--
2.25.1