^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/9p/v9fs.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This file contains functions assisting in mapping VFS to 9P2000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cred.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/idr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <net/9p/9p.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <net/9p/client.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <net/9p/transport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "v9fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "v9fs_vfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "cache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static LIST_HEAD(v9fs_sessionlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct kmem_cache *v9fs_inode_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Option Parsing (code inspired by NFS code)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * NOTE: each transport will parse its own options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* Options that take integer arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* String options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Opt_uname, Opt_remotename, Opt_cache, Opt_cachetag,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* Options that take no arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) Opt_nodevmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /* Cache options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) Opt_cache_loose, Opt_fscache, Opt_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* Access options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) Opt_access, Opt_posixacl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* Lock timeout option */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) Opt_locktimeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Error token */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) Opt_err
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static const match_table_t tokens = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {Opt_debug, "debug=%x"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {Opt_dfltuid, "dfltuid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {Opt_dfltgid, "dfltgid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {Opt_afid, "afid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {Opt_uname, "uname=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {Opt_remotename, "aname=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {Opt_nodevmap, "nodevmap"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {Opt_cache, "cache=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {Opt_cache_loose, "loose"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {Opt_fscache, "fscache"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {Opt_mmap, "mmap"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {Opt_cachetag, "cachetag=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {Opt_access, "access=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {Opt_posixacl, "posixacl"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {Opt_locktimeout, "locktimeout=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {Opt_err, NULL}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static const char *const v9fs_cache_modes[nr__p9_cache_modes] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) [CACHE_NONE] = "none",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) [CACHE_MMAP] = "mmap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) [CACHE_LOOSE] = "loose",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) [CACHE_FSCACHE] = "fscache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /* Interpret mount options for cache mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static int get_cache_mode(char *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int version = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!strcmp(s, "loose")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) version = CACHE_LOOSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) p9_debug(P9_DEBUG_9P, "Cache mode: loose\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) } else if (!strcmp(s, "fscache")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) version = CACHE_FSCACHE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) p9_debug(P9_DEBUG_9P, "Cache mode: fscache\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) } else if (!strcmp(s, "mmap")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) version = CACHE_MMAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) p9_debug(P9_DEBUG_9P, "Cache mode: mmap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) } else if (!strcmp(s, "none")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) version = CACHE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) p9_debug(P9_DEBUG_9P, "Cache mode: none\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) pr_info("Unknown Cache mode %s\n", s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * Display the mount options in /proc/mounts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int v9fs_show_options(struct seq_file *m, struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct v9fs_session_info *v9ses = root->d_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (v9ses->debug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) seq_printf(m, ",debug=%x", v9ses->debug);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (!uid_eq(v9ses->dfltuid, V9FS_DEFUID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) seq_printf(m, ",dfltuid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) from_kuid_munged(&init_user_ns, v9ses->dfltuid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!gid_eq(v9ses->dfltgid, V9FS_DEFGID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) seq_printf(m, ",dfltgid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) from_kgid_munged(&init_user_ns, v9ses->dfltgid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (v9ses->afid != ~0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) seq_printf(m, ",afid=%u", v9ses->afid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (strcmp(v9ses->uname, V9FS_DEFUSER) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) seq_printf(m, ",uname=%s", v9ses->uname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (strcmp(v9ses->aname, V9FS_DEFANAME) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) seq_printf(m, ",aname=%s", v9ses->aname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (v9ses->nodev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) seq_puts(m, ",nodevmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (v9ses->cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) seq_printf(m, ",%s", v9fs_cache_modes[v9ses->cache]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (v9ses->cachetag && v9ses->cache == CACHE_FSCACHE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) seq_printf(m, ",cachetag=%s", v9ses->cachetag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) switch (v9ses->flags & V9FS_ACCESS_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) case V9FS_ACCESS_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) seq_puts(m, ",access=user");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) case V9FS_ACCESS_ANY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) seq_puts(m, ",access=any");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) case V9FS_ACCESS_CLIENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) seq_puts(m, ",access=client");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) case V9FS_ACCESS_SINGLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) seq_printf(m, ",access=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) from_kuid_munged(&init_user_ns, v9ses->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (v9ses->flags & V9FS_POSIX_ACL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) seq_puts(m, ",posixacl");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return p9_show_client_options(m, v9ses->clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * v9fs_parse_options - parse mount options into session structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * @v9ses: existing v9fs session information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * Return 0 upon success, -ERRNO upon failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) char *options, *tmp_options;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) substring_t args[MAX_OPT_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) int option = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) char *s, *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* setup defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) v9ses->afid = ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) v9ses->debug = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) v9ses->cache = CACHE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) v9ses->cachetag = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) v9ses->session_lock_timeout = P9_LOCK_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!opts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) tmp_options = kstrdup(opts, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!tmp_options) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) goto fail_option_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) options = tmp_options;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) while ((p = strsep(&options, ",")) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) int token, r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (!*p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) token = match_token(p, tokens, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) switch (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case Opt_debug:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) r = match_int(&args[0], &option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) "integer field, but no integer?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ret = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) v9ses->debug = option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) #ifdef CONFIG_NET_9P_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) p9_debug_level = option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) case Opt_dfltuid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) r = match_int(&args[0], &option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) "integer field, but no integer?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ret = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) v9ses->dfltuid = make_kuid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!uid_valid(v9ses->dfltuid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) "uid field, but not a uid?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) case Opt_dfltgid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) r = match_int(&args[0], &option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) "integer field, but no integer?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) ret = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) v9ses->dfltgid = make_kgid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (!gid_valid(v9ses->dfltgid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) "gid field, but not a gid?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) case Opt_afid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) r = match_int(&args[0], &option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) "integer field, but no integer?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) ret = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) v9ses->afid = option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) case Opt_uname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) kfree(v9ses->uname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) v9ses->uname = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (!v9ses->uname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) goto free_and_return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) case Opt_remotename:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) kfree(v9ses->aname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) v9ses->aname = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (!v9ses->aname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) goto free_and_return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) case Opt_nodevmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) v9ses->nodev = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) case Opt_cache_loose:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) v9ses->cache = CACHE_LOOSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) case Opt_fscache:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) v9ses->cache = CACHE_FSCACHE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) case Opt_mmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) v9ses->cache = CACHE_MMAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) case Opt_cachetag:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) kfree(v9ses->cachetag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) v9ses->cachetag = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (!v9ses->cachetag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) goto free_and_return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) case Opt_cache:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) s = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (!s) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) "problem allocating copy of cache arg\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) goto free_and_return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) r = get_cache_mode(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) ret = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) v9ses->cache = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) kfree(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) case Opt_access:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) s = match_strdup(&args[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (!s) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) "problem allocating copy of access arg\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) goto free_and_return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) v9ses->flags &= ~V9FS_ACCESS_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (strcmp(s, "user") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) v9ses->flags |= V9FS_ACCESS_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) else if (strcmp(s, "any") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) v9ses->flags |= V9FS_ACCESS_ANY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) else if (strcmp(s, "client") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) v9ses->flags |= V9FS_ACCESS_CLIENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) uid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) v9ses->flags |= V9FS_ACCESS_SINGLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) uid = simple_strtoul(s, &e, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (*e != '\0') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) pr_info("Unknown access argument %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) kfree(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) v9ses->uid = make_kuid(current_user_ns(), uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (!uid_valid(v9ses->uid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) pr_info("Unknown uid %s\n", s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) kfree(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) case Opt_posixacl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) #ifdef CONFIG_9P_FS_POSIX_ACL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) v9ses->flags |= V9FS_POSIX_ACL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) "Not defined CONFIG_9P_FS_POSIX_ACL. Ignoring posixacl option\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) case Opt_locktimeout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) r = match_int(&args[0], &option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) "integer field, but no integer?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) ret = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (option < 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) p9_debug(P9_DEBUG_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) "locktimeout must be a greater than zero integer.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) v9ses->session_lock_timeout = (long)option * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) free_and_return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) kfree(tmp_options);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) fail_option_alloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * v9fs_session_init - initialize session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * @v9ses: session information structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * @dev_name: device being mounted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * @data: options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) const char *dev_name, char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct p9_fid *fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) v9ses->uname = kstrdup(V9FS_DEFUSER, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (!v9ses->uname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) goto err_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) v9ses->aname = kstrdup(V9FS_DEFANAME, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (!v9ses->aname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) goto err_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) init_rwsem(&v9ses->rename_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) v9ses->uid = INVALID_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) v9ses->dfltuid = V9FS_DEFUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) v9ses->dfltgid = V9FS_DEFGID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) v9ses->clnt = p9_client_create(dev_name, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (IS_ERR(v9ses->clnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) rc = PTR_ERR(v9ses->clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) goto err_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) v9ses->flags = V9FS_ACCESS_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (p9_is_proto_dotl(v9ses->clnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) v9ses->flags = V9FS_ACCESS_CLIENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) v9ses->flags |= V9FS_PROTO_2000L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) } else if (p9_is_proto_dotu(v9ses->clnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) v9ses->flags |= V9FS_PROTO_2000U;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) rc = v9fs_parse_options(v9ses, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) goto err_clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (!v9fs_proto_dotl(v9ses) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * We support ACCESS_CLIENT only for dotl.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * Fall back to ACCESS_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) v9ses->flags &= ~V9FS_ACCESS_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) v9ses->flags |= V9FS_ACCESS_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /*FIXME !! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) /* for legacy mode, fall back to V9FS_ACCESS_ANY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) v9ses->flags &= ~V9FS_ACCESS_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) v9ses->flags |= V9FS_ACCESS_ANY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) v9ses->uid = INVALID_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!v9fs_proto_dotl(v9ses) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) !((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * We support ACL checks on clinet only if the protocol is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * 9P2000.L and access is V9FS_ACCESS_CLIENT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) v9ses->flags &= ~V9FS_ACL_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, INVALID_UID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) v9ses->aname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (IS_ERR(fid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) rc = PTR_ERR(fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) p9_debug(P9_DEBUG_ERROR, "cannot attach\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) goto err_clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) fid->uid = v9ses->uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) fid->uid = INVALID_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /* register the session for caching */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) v9fs_cache_session_get_cookie(v9ses);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) spin_lock(&v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) list_add(&v9ses->slist, &v9fs_sessionlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) spin_unlock(&v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) err_clnt:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) kfree(v9ses->cachetag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) p9_client_destroy(v9ses->clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) err_names:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) kfree(v9ses->uname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) kfree(v9ses->aname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) return ERR_PTR(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) * v9fs_session_close - shutdown a session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * @v9ses: session information structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) void v9fs_session_close(struct v9fs_session_info *v9ses)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (v9ses->clnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) p9_client_destroy(v9ses->clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) v9ses->clnt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) if (v9ses->fscache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) v9fs_cache_session_put_cookie(v9ses);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) kfree(v9ses->cachetag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) kfree(v9ses->uname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) kfree(v9ses->aname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) spin_lock(&v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) list_del(&v9ses->slist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) spin_unlock(&v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * v9fs_session_cancel - terminate a session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * @v9ses: session to terminate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * mark transport as disconnected and cancel all pending requests.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) p9_debug(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) p9_client_disconnect(v9ses->clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) * v9fs_session_begin_cancel - Begin terminate of a session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * @v9ses: session to terminate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * After this call we don't allow any request other than clunk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) p9_debug(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) p9_client_begin_disconnect(v9ses->clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) extern int v9fs_error_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) static struct kobject *v9fs_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) * caches_show - list caches associated with a session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * Returns the size of buffer written.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) static ssize_t caches_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) ssize_t n = 0, count = 0, limit = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) struct v9fs_session_info *v9ses;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) spin_lock(&v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) list_for_each_entry(v9ses, &v9fs_sessionlist, slist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (v9ses->cachetag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) n = snprintf(buf, limit, "%s\n", v9ses->cachetag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (n < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) count = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) count += n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) limit -= n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) spin_unlock(&v9fs_sessionlist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) static struct kobj_attribute v9fs_attr_cache = __ATTR_RO(caches);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) #endif /* CONFIG_9P_FSCACHE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) static struct attribute *v9fs_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) &v9fs_attr_cache.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) static struct attribute_group v9fs_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) .attrs = v9fs_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * v9fs_sysfs_init - Initialize the v9fs sysfs interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static int __init v9fs_sysfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) v9fs_kobj = kobject_create_and_add("9p", fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (!v9fs_kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (sysfs_create_group(v9fs_kobj, &v9fs_attr_group)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) kobject_put(v9fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * v9fs_sysfs_cleanup - Unregister the v9fs sysfs interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) static void v9fs_sysfs_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) sysfs_remove_group(v9fs_kobj, &v9fs_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) kobject_put(v9fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) static void v9fs_inode_init_once(void *foo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) struct v9fs_inode *v9inode = (struct v9fs_inode *)foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) v9inode->fscache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) memset(&v9inode->qid, 0, sizeof(v9inode->qid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) inode_init_once(&v9inode->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) * v9fs_init_inode_cache - initialize a cache for 9P
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) * Returns 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) static int v9fs_init_inode_cache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) sizeof(struct v9fs_inode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) 0, (SLAB_RECLAIM_ACCOUNT|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) SLAB_MEM_SPREAD|SLAB_ACCOUNT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) v9fs_inode_init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if (!v9fs_inode_cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * v9fs_destroy_inode_cache - destroy the cache of 9P inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) static void v9fs_destroy_inode_cache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) kmem_cache_destroy(v9fs_inode_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) static int v9fs_cache_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) ret = v9fs_init_inode_cache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) ret = fscache_register_netfs(&v9fs_cache_netfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) v9fs_destroy_inode_cache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) static void v9fs_cache_unregister(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) v9fs_destroy_inode_cache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) #ifdef CONFIG_9P_FSCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) fscache_unregister_netfs(&v9fs_cache_netfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) * init_v9fs - Initialize module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) static int __init init_v9fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) pr_info("Installing v9fs 9p2000 file system support\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) /* TODO: Setup list of registered trasnport modules */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) err = v9fs_cache_register();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) pr_err("Failed to register v9fs for caching\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) err = v9fs_sysfs_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) pr_err("Failed to register with sysfs\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) goto out_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) err = register_filesystem(&v9fs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) pr_err("Failed to register filesystem\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) goto out_sysfs_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) out_sysfs_cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) v9fs_sysfs_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) out_cache:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) v9fs_cache_unregister();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * exit_v9fs - shutdown module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) static void __exit exit_v9fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) v9fs_sysfs_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) v9fs_cache_unregister();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) unregister_filesystem(&v9fs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) module_init(init_v9fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) module_exit(exit_v9fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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