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Add FUSE_CAP_NO_EXPORT and use it in passthrough_hp

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This should stop some more xfstest test failures.
This commit is contained in:
Bernd Schubert 2024-09-19 15:09:04 +02:00 committed by Bernd Schubert
parent 15f5c81123
commit e2eb1abb10
4 changed files with 25 additions and 1 deletions
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10
example/passthrough_hp.cc
View File

@ -214,6 +214,16 @@ static void sfs_init(void *userdata, fuse_conn_info *conn) {
/* This is a local file system - no network coherency needed */
fuse_set_feature_flag(conn, FUSE_CAP_DIRECT_IO_ALLOW_MMAP);
/* Disable NFS export support, which also disabled name_to_handle_at.
* Goal is to make xfstests that test name_to_handle_at to fail with
* the right error code (EOPNOTSUPP) than to open_by_handle_at to fail with
* ESTALE and let those test fail.
* Perfect NFS export support is not possible with this FUSE filesystem needs
* more kernel work, in order to passthrough nfs handle encode/decode to
* fuse-server/daemon.
*/
fuse_set_feature_flag(conn, FUSE_CAP_NO_EXPORT_SUPPORT);
/* Disable the receiving and processing of FUSE_INTERRUPT requests */
conn->no_interrupt = 1;
}

4
example/printcap.c
View File

@ -88,7 +88,9 @@ static void pc_init(void *userdata,
if(conn->capable & FUSE_CAP_HANDLE_KILLPRIV_V2)
printf("\tFUSE_CAP_HANDLE_KILLPRIV_V2\n");
if(conn->capable & FUSE_CAP_DIRECT_IO_ALLOW_MMAP)
printf("\tFUSE_CAP_DIRECT_IO_ALLOW_MMAP\n");
printf("\tFUSE_CAP_DIRECT_IO_ALLOW_MMAP\n");
if (conn->capable & FUSE_CAP_NO_EXPORT_SUPPORT)
printf("\tFUSE_CAP_NO_EXPORT_SUPPORT\n");
fuse_session_exit(se);
}

8
include/fuse_common.h
View File

@ -494,6 +494,14 @@ struct fuse_loop_config_v1 {
*/
#define FUSE_CAP_PASSTHROUGH (1 << 29)
/**
* Indicates that the file system cannot handle NFS export
*
* If this flag is set NFS export and name_to_handle_at
* is not going to work at all and will fail with EOPNOTSUPP.
*/
#define FUSE_CAP_NO_EXPORT_SUPPORT (1 << 30)
/**
* Ioctl flags
*

4
lib/fuse_lowlevel.c
View File

@ -2081,6 +2081,8 @@ void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
se->conn.capable |= FUSE_CAP_EXPIRE_ONLY;
if (inargflags & FUSE_PASSTHROUGH)
se->conn.capable |= FUSE_CAP_PASSTHROUGH;
if (inargflags & FUSE_NO_EXPORT_SUPPORT)
se->conn.capable |= FUSE_CAP_NO_EXPORT_SUPPORT;
} else {
se->conn.max_readahead = 0;
}
@ -2217,6 +2219,8 @@ void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
*/
outarg.max_stack_depth = se->conn.max_backing_stack_depth + 1;
}
if (se->conn.want & FUSE_CAP_NO_EXPORT_SUPPORT)
outargflags |= FUSE_NO_EXPORT_SUPPORT;
if (inargflags & FUSE_INIT_EXT) {
outargflags |= FUSE_INIT_EXT;