From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- fs/afs/misc.c | 208 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 fs/afs/misc.c (limited to 'fs/afs/misc.c') diff --git a/fs/afs/misc.c b/fs/afs/misc.c new file mode 100644 index 000000000..c8a7f2660 --- /dev/null +++ b/fs/afs/misc.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* miscellaneous bits + * + * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#include +#include +#include +#include +#include "internal.h" +#include "afs_fs.h" +#include "protocol_uae.h" + +/* + * convert an AFS abort code to a Linux error number + */ +int afs_abort_to_error(u32 abort_code) +{ + switch (abort_code) { + /* Low errno codes inserted into abort namespace */ + case 13: return -EACCES; + case 27: return -EFBIG; + case 30: return -EROFS; + + /* VICE "special error" codes; 101 - 111 */ + case VSALVAGE: return -EIO; + case VNOVNODE: return -ENOENT; + case VNOVOL: return -ENOMEDIUM; + case VVOLEXISTS: return -EEXIST; + case VNOSERVICE: return -EIO; + case VOFFLINE: return -ENOENT; + case VONLINE: return -EEXIST; + case VDISKFULL: return -ENOSPC; + case VOVERQUOTA: return -EDQUOT; + case VBUSY: return -EBUSY; + case VMOVED: return -ENXIO; + + /* Volume Location server errors */ + case AFSVL_IDEXIST: return -EEXIST; + case AFSVL_IO: return -EREMOTEIO; + case AFSVL_NAMEEXIST: return -EEXIST; + case AFSVL_CREATEFAIL: return -EREMOTEIO; + case AFSVL_NOENT: return -ENOMEDIUM; + case AFSVL_EMPTY: return -ENOMEDIUM; + case AFSVL_ENTDELETED: return -ENOMEDIUM; + case AFSVL_BADNAME: return -EINVAL; + case AFSVL_BADINDEX: return -EINVAL; + case AFSVL_BADVOLTYPE: return -EINVAL; + case AFSVL_BADSERVER: return -EINVAL; + case AFSVL_BADPARTITION: return -EINVAL; + case AFSVL_REPSFULL: return -EFBIG; + case AFSVL_NOREPSERVER: return -ENOENT; + case AFSVL_DUPREPSERVER: return -EEXIST; + case AFSVL_RWNOTFOUND: return -ENOENT; + case AFSVL_BADREFCOUNT: return -EINVAL; + case AFSVL_SIZEEXCEEDED: return -EINVAL; + case AFSVL_BADENTRY: return -EINVAL; + case AFSVL_BADVOLIDBUMP: return -EINVAL; + case AFSVL_IDALREADYHASHED: return -EINVAL; + case AFSVL_ENTRYLOCKED: return -EBUSY; + case AFSVL_BADVOLOPER: return -EBADRQC; + case AFSVL_BADRELLOCKTYPE: return -EINVAL; + case AFSVL_RERELEASE: return -EREMOTEIO; + case AFSVL_BADSERVERFLAG: return -EINVAL; + case AFSVL_PERM: return -EACCES; + case AFSVL_NOMEM: return -EREMOTEIO; + + /* Unified AFS error table */ + case UAEPERM: return -EPERM; + case UAENOENT: return -ENOENT; + case UAEAGAIN: return -EAGAIN; + case UAEACCES: return -EACCES; + case UAEBUSY: return -EBUSY; + case UAEEXIST: return -EEXIST; + case UAENOTDIR: return -ENOTDIR; + case UAEISDIR: return -EISDIR; + case UAEFBIG: return -EFBIG; + case UAENOSPC: return -ENOSPC; + case UAEROFS: return -EROFS; + case UAEMLINK: return -EMLINK; + case UAEDEADLK: return -EDEADLK; + case UAENAMETOOLONG: return -ENAMETOOLONG; + case UAENOLCK: return -ENOLCK; + case UAENOTEMPTY: return -ENOTEMPTY; + case UAELOOP: return -ELOOP; + case UAEOVERFLOW: return -EOVERFLOW; + case UAENOMEDIUM: return -ENOMEDIUM; + case UAEDQUOT: return -EDQUOT; + + /* RXKAD abort codes; from include/rxrpc/packet.h. ET "RXK" == 0x1260B00 */ + case RXKADINCONSISTENCY: return -EPROTO; + case RXKADPACKETSHORT: return -EPROTO; + case RXKADLEVELFAIL: return -EKEYREJECTED; + case RXKADTICKETLEN: return -EKEYREJECTED; + case RXKADOUTOFSEQUENCE: return -EPROTO; + case RXKADNOAUTH: return -EKEYREJECTED; + case RXKADBADKEY: return -EKEYREJECTED; + case RXKADBADTICKET: return -EKEYREJECTED; + case RXKADUNKNOWNKEY: return -EKEYREJECTED; + case RXKADEXPIRED: return -EKEYEXPIRED; + case RXKADSEALEDINCON: return -EKEYREJECTED; + case RXKADDATALEN: return -EKEYREJECTED; + case RXKADILLEGALLEVEL: return -EKEYREJECTED; + + case RXGK_INCONSISTENCY: return -EPROTO; + case RXGK_PACKETSHORT: return -EPROTO; + case RXGK_BADCHALLENGE: return -EPROTO; + case RXGK_SEALEDINCON: return -EKEYREJECTED; + case RXGK_NOTAUTH: return -EKEYREJECTED; + case RXGK_EXPIRED: return -EKEYEXPIRED; + case RXGK_BADLEVEL: return -EKEYREJECTED; + case RXGK_BADKEYNO: return -EKEYREJECTED; + case RXGK_NOTRXGK: return -EKEYREJECTED; + case RXGK_UNSUPPORTED: return -EKEYREJECTED; + case RXGK_GSSERROR: return -EKEYREJECTED; +#ifdef RXGK_BADETYPE + case RXGK_BADETYPE: return -ENOPKG; +#endif +#ifdef RXGK_BADTOKEN + case RXGK_BADTOKEN: return -EKEYREJECTED; +#endif +#ifdef RXGK_BADETYPE + case RXGK_DATALEN: return -EPROTO; +#endif +#ifdef RXGK_BADQOP + case RXGK_BADQOP: return -EKEYREJECTED; +#endif + + case KRB5_PROG_KEYTYPE_NOSUPP: return -ENOPKG; + + case RXGEN_OPCODE: return -ENOTSUPP; + case RX_INVALID_OPERATION: return -ENOTSUPP; + + default: return -EREMOTEIO; + } +} + +/* + * Select the error to report from a set of errors. + */ +void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code) +{ + switch (error) { + case 0: + e->aborted = false; + e->error = 0; + return; + default: + if (e->error == -ETIMEDOUT || + e->error == -ETIME) + return; + fallthrough; + case -ETIMEDOUT: + case -ETIME: + if (e->error == -ENOMEM || + e->error == -ENONET) + return; + fallthrough; + case -ENOMEM: + case -ENONET: + if (e->error == -ERFKILL) + return; + fallthrough; + case -ERFKILL: + if (e->error == -EADDRNOTAVAIL) + return; + fallthrough; + case -EADDRNOTAVAIL: + if (e->error == -ENETUNREACH) + return; + fallthrough; + case -ENETUNREACH: + if (e->error == -EHOSTUNREACH) + return; + fallthrough; + case -EHOSTUNREACH: + if (e->error == -EHOSTDOWN) + return; + fallthrough; + case -EHOSTDOWN: + if (e->error == -ECONNREFUSED) + return; + fallthrough; + case -ECONNREFUSED: + if (e->error == -ECONNRESET) + return; + fallthrough; + case -ECONNRESET: /* Responded, but call expired. */ + if (e->responded) + return; + e->error = error; + e->aborted = false; + return; + + case -ECONNABORTED: + e->error = afs_abort_to_error(abort_code); + e->aborted = true; + e->responded = true; + return; + case -ENETRESET: /* Responded, but we seem to have changed address */ + e->aborted = false; + e->responded = true; + e->error = error; + return; + } +} -- cgit v1.3.1