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Current implementation of 'Twalk' request handling always sends an 'Rerror' response if any error occured. The 9p2000 protocol spec says though: " If the first element cannot be walked for any reason, Rerror is returned. Otherwise, the walk will return an Rwalk message containing nwqid qids corresponding, in order, to the files that are visited by the nwqid successful elementwise walks; nwqid is therefore either nwname or the index of the first elementwise walk that failed. " http://ericvh.github.io/9p-rfc/rfc9p2000.html#anchor33 For that reason we are no longer leaving from an error path in function v9fs_walk(), unless really no path component could be walked successfully or if the request has been interrupted. Local variable 'nwalked' counts and reflects the number of path components successfully processed by background I/O thread, whereas local variable 'name_idx' subsequently counts and reflects the number of path components eventually accepted successfully by 9p server controller portion. New local variable 'any_err' is an aggregate variable reflecting whether any error occurred at all, while already existing variable 'err' only reflects the last error. Despite QIDs being delivered to client in a more relaxed way now, it is important to note though that fid still must remain unaffected if any error occurred. Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <bc73e24258a75dc29458024c7936c8a036c3eac5.1647339025.git.qemu_oss@crudebyte.com> |
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| .. | ||
| 9p-local.c | ||
| 9p-local.h | ||
| 9p-posix-acl.c | ||
| 9p-proxy.c | ||
| 9p-proxy.h | ||
| 9p-synth.c | ||
| 9p-synth.h | ||
| 9p-util-darwin.c | ||
| 9p-util-linux.c | ||
| 9p-util.h | ||
| 9p-xattr-user.c | ||
| 9p-xattr.c | ||
| 9p-xattr.h | ||
| 9p.c | ||
| 9p.h | ||
| codir.c | ||
| cofile.c | ||
| cofs.c | ||
| coth.c | ||
| coth.h | ||
| coxattr.c | ||
| Kconfig | ||
| meson.build | ||
| trace-events | ||
| trace.h | ||
| virtio-9p-device.c | ||
| virtio-9p.h | ||
| xen-9p-backend.c | ||
| xen-9pfs.h | ||