diff options
| author | David Howells <dhowells@redhat.com> | 2023-10-11 17:34:07 +0300 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2023-12-24 18:08:52 +0300 |
| commit | 46ed60dcd4f2c94d27735743ce55cd8d6b93cc1d (patch) | |
| tree | df301bcb6bd4bdf33b46ba46499353f83753c4df /include/linux/netfs.h | |
| parent | c1ec4d7c2e13471558cfea302b7583856284f94c (diff) | |
| download | linux-46ed60dcd4f2c94d27735743ce55cd8d6b93cc1d.tar.xz | |
netfs: Implement unbuffered/DIO vs buffered I/O locking
Borrow NFS's direct-vs-buffered I/O locking into netfslib. Similar code is
also used in ceph.
Modify it to have the correct checker annotations for i_rwsem lock
acquisition/release and to return -ERESTARTSYS if waits are interrupted.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Diffstat (limited to 'include/linux/netfs.h')
| -rw-r--r-- | include/linux/netfs.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 8efbfd3b2820..fc6d9756a029 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -129,6 +129,8 @@ struct netfs_inode { struct fscache_cookie *cache; #endif loff_t remote_i_size; /* Size of the remote file */ + unsigned long flags; +#define NETFS_ICTX_ODIRECT 0 /* The file has DIO in progress */ }; /* @@ -310,6 +312,13 @@ ssize_t netfs_extract_user_iter(struct iov_iter *orig, size_t orig_len, struct iov_iter *new, iov_iter_extraction_t extraction_flags); +int netfs_start_io_read(struct inode *inode); +void netfs_end_io_read(struct inode *inode); +int netfs_start_io_write(struct inode *inode); +void netfs_end_io_write(struct inode *inode); +int netfs_start_io_direct(struct inode *inode); +void netfs_end_io_direct(struct inode *inode); + /** * netfs_inode - Get the netfs inode context from the inode * @inode: The inode to query @@ -335,6 +344,7 @@ static inline void netfs_inode_init(struct netfs_inode *ctx, { ctx->ops = ops; ctx->remote_i_size = i_size_read(&ctx->inode); + ctx->flags = 0; #if IS_ENABLED(CONFIG_FSCACHE) ctx->cache = NULL; #endif |