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| author | Christoph Hellwig <hch@lst.de> | 2026-01-08 17:19:07 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-01-12 16:01:33 +0300 |
| commit | 5cf06ea56ee67209d4e9a0b381641fb062ecd2c3 (patch) | |
| tree | 14e081b4f62107425f38b354b343872b10999e3b /Documentation | |
| parent | 188344c8ac0b740ee2e5deebda2004b39ccbee74 (diff) | |
| download | linux-5cf06ea56ee67209d4e9a0b381641fb062ecd2c3.tar.xz | |
fs: add a ->sync_lazytime method
Allow the file system to explicitly implement lazytime syncing instead
of pigging back on generic inode dirtying. This allows to simplify
the XFS implementation and prepares for non-blocking lazytime timestamp
updates.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260108141934.2052404-8-hch@lst.de
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/locking.rst | 2 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.rst | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index 37a4a7fa8094..0312fba6d73b 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -82,6 +82,7 @@ prototypes:: int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len); void (*update_time)(struct inode *inode, enum fs_update_time type, int flags); + void (*sync_lazytime)(struct inode *inode); int (*atomic_open)(struct inode *, struct dentry *, struct file *, unsigned open_flag, umode_t create_mode); @@ -118,6 +119,7 @@ getattr: no listxattr: no fiemap: no update_time: no +sync_lazytime: no atomic_open: shared (exclusive if O_CREAT is set in open flags) tmpfile: no fileattr_get: no or exclusive diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst index 51aa9db64784..d8cb181f69f8 100644 --- a/Documentation/filesystems/vfs.rst +++ b/Documentation/filesystems/vfs.rst @@ -487,6 +487,7 @@ As of kernel 2.6.22, the following members are defined: ssize_t (*listxattr) (struct dentry *, char *, size_t); void (*update_time)(struct inode *inode, enum fs_update_time type, int flags); + void (*sync_lazytime)(struct inode *inode); int (*atomic_open)(struct inode *, struct dentry *, struct file *, unsigned open_flag, umode_t create_mode); int (*tmpfile) (struct mnt_idmap *, struct inode *, struct file *, umode_t); @@ -643,6 +644,11 @@ otherwise noted. an inode. If this is not defined the VFS will update the inode itself and call mark_inode_dirty_sync. +``sync_lazytime``: + called by the writeback code to update the lazy time stamps to + regular time stamp updates that get syncing into the on-disk + inode. + ``atomic_open`` called on the last component of an open. Using this optional method the filesystem can look up, possibly create and open the |