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virtiofsd: Announce FUSE_ATTR_FLAGS

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The fuse_attr.flags field is currently just initialized to 0, which is
valid.  Thus, there is no reason not to always announce FUSE_ATTR_FLAGS
(when the kernel supports it).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200909184028.262297-3-mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Max Reitz 2020-09-09 20:40:22 +02:00 committed by Dr. David Alan Gilbert
parent 97d741cc96
commit 2f10415abf
2 changed files with 15 additions and 0 deletions
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8
tools/virtiofsd/fuse_common.h
View file

@ -352,6 +352,14 @@ struct fuse_file_info {
*/
#define FUSE_CAP_NO_OPENDIR_SUPPORT (1 << 24)
/**
* Indicates that the client will provide fuse_attr.flags, and the kernel will
* interpret it.
*
* This feature is enabled by default when supported by the kernel.
*/
#define FUSE_CAP_ATTR_FLAGS (1 << 27)
/**
* Ioctl flags
*

7
tools/virtiofsd/fuse_lowlevel.c
View file

@ -1988,6 +1988,9 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
bufsize = max_bufsize;
}
}
if (arg->flags & FUSE_ATTR_FLAGS) {
se->conn.capable |= FUSE_CAP_ATTR_FLAGS;
}
#ifdef HAVE_SPLICE
#ifdef HAVE_VMSPLICE
se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
@ -2014,6 +2017,7 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO);
LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR);
LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC);
LL_SET_DEFAULT(1, FUSE_CAP_ATTR_FLAGS);
LL_SET_DEFAULT(se->op.write_buf, FUSE_CAP_SPLICE_READ);
LL_SET_DEFAULT(se->op.getlk && se->op.setlk, FUSE_CAP_POSIX_LOCKS);
LL_SET_DEFAULT(se->op.flock, FUSE_CAP_FLOCK_LOCKS);
@ -2103,6 +2107,9 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
if (se->conn.want & FUSE_CAP_POSIX_ACL) {
outarg.flags |= FUSE_POSIX_ACL;
}
if (se->conn.want & FUSE_CAP_ATTR_FLAGS) {
outarg.flags |= FUSE_ATTR_FLAGS;
}
outarg.max_readahead = se->conn.max_readahead;
outarg.max_write = se->conn.max_write;
if (se->conn.max_background >= (1 << 16)) {