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fuse: add FUSE_AUTO_INVAL_DATA init flag
FUSE_AUTO_INVAL_DATA is provided to enable updated/auto cache invalidation logic. Signed-off-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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parent
84a1caf145
commit
72d0d248ca
3 changed files with 12 additions and 2 deletions
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@ -484,6 +484,9 @@ struct fuse_conn {
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/** Is fallocate not implemented by fs? */
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unsigned no_fallocate:1;
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/** Use enhanced/automatic page cache invalidation. */
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unsigned auto_inval_data:1;
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/** The number of requests waiting for completion */
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atomic_t num_waiting;
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@ -834,6 +834,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
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fc->big_writes = 1;
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if (arg->flags & FUSE_DONT_MASK)
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fc->dont_mask = 1;
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if (arg->flags & FUSE_AUTO_INVAL_DATA)
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fc->auto_inval_data = 1;
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} else {
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ra_pages = fc->max_read / PAGE_CACHE_SIZE;
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fc->no_lock = 1;
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@ -859,7 +861,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
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arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
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arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
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FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
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FUSE_FLOCK_LOCKS;
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FUSE_FLOCK_LOCKS | FUSE_AUTO_INVAL_DATA;
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req->in.h.opcode = FUSE_INIT;
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req->in.numargs = 1;
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req->in.args[0].size = sizeof(*arg);
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@ -57,6 +57,9 @@
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*
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* 7.19
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* - add FUSE_FALLOCATE
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*
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* 7.20
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* - add FUSE_AUTO_INVAL_DATA
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*/
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#ifndef _LINUX_FUSE_H
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@ -88,7 +91,7 @@
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#define FUSE_KERNEL_VERSION 7
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/** Minor version number of this interface */
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#define FUSE_KERNEL_MINOR_VERSION 19
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#define FUSE_KERNEL_MINOR_VERSION 20
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/** The node ID of the root inode */
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#define FUSE_ROOT_ID 1
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@ -167,6 +170,7 @@ struct fuse_file_lock {
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* FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
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* FUSE_DONT_MASK: don't apply umask to file mode on create operations
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* FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
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* FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
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*/
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#define FUSE_ASYNC_READ (1 << 0)
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#define FUSE_POSIX_LOCKS (1 << 1)
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@ -176,6 +180,7 @@ struct fuse_file_lock {
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#define FUSE_BIG_WRITES (1 << 5)
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#define FUSE_DONT_MASK (1 << 6)
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#define FUSE_FLOCK_LOCKS (1 << 10)
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#define FUSE_AUTO_INVAL_DATA (1 << 12)
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/**
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* CUSE INIT request/reply flags
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