88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
#include <sys/param.h>
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#include <sys/fcntl.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/vnode.h>
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static char probe_path[MAXPATHLEN];
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static int probe_result = -1;
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static int
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probe_run(SYSCTL_HANDLER_ARGS)
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{
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struct nameidata nd;
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struct vattr attributes;
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struct vnode *vnode;
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int error, operation;
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operation = 0;
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error = sysctl_handle_int(oidp, &operation, 0, req);
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if (error != 0 || req->newptr == NULL)
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return (error);
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if (operation < 1 || operation > 5 || probe_path[0] == '\0')
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return (EINVAL);
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, probe_path);
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error = namei(&nd);
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if (error != 0) {
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probe_result = error;
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return (0);
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}
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vnode = nd.ni_vp;
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NDFREE_PNBUF(&nd);
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VATTR_NULL(&attributes);
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attributes.va_size = 0;
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if (operation == 2 || operation == 5)
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attributes.va_mode = 0600;
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if (operation == 3 || operation == 5) {
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attributes.va_uid = 1;
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attributes.va_gid = 1;
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}
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if (operation == 4 || operation == 5) {
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attributes.va_atime.tv_sec = 1;
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attributes.va_atime.tv_nsec = 0;
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attributes.va_mtime.tv_sec = 1;
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attributes.va_mtime.tv_nsec = 0;
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}
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probe_result = VOP_SETATTR(vnode, &attributes, curthread->td_ucred);
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vput(vnode);
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return (0);
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}
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static int
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probe_modevent(module_t module, int event, void *arg)
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{
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(void)module;
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(void)arg;
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switch (event) {
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case MOD_LOAD:
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case MOD_UNLOAD:
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return (0);
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default:
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return (EOPNOTSUPP);
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}
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}
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SYSCTL_NODE(_debug, OID_AUTO, erofs_setattr_probe,
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CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "EROFS setattr regression probe");
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SYSCTL_STRING(_debug_erofs_setattr_probe, OID_AUTO, path, CTLFLAG_RW,
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probe_path, sizeof(probe_path), "Target vnode path");
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SYSCTL_PROC(_debug_erofs_setattr_probe, OID_AUTO, run,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, 0, probe_run, "I",
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"1=size; 2=size+mode; 3=size+owner; 4=size+times; 5=all");
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SYSCTL_INT(_debug_erofs_setattr_probe, OID_AUTO, result, CTLFLAG_RD,
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&probe_result, 0, "Last VOP_SETATTR errno");
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static moduledata_t probe_module = {
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"erofs_setattr_probe",
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probe_modevent,
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NULL,
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};
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DECLARE_MODULE(erofs_setattr_probe, probe_module, SI_SUB_DRIVERS,
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SI_ORDER_MIDDLE);
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MODULE_VERSION(erofs_setattr_probe, 1);
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