^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) * Copyright (c) 2012 Bryan Schumaker <bjschuma@netapp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/nfs4_mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/nfs_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/nfs_ssc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "delegation.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "nfs4_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "nfs4idmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "dns_resolve.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "pnfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "nfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define NFSDBG_FACILITY NFSDBG_VFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static void nfs4_evict_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static const struct super_operations nfs4_sops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .alloc_inode = nfs_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) .free_inode = nfs_free_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) .write_inode = nfs4_write_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .drop_inode = nfs_drop_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .statfs = nfs_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .evict_inode = nfs4_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .umount_begin = nfs_umount_begin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .show_options = nfs_show_options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .show_devname = nfs_show_devname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .show_path = nfs_show_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .show_stats = nfs_show_stats,
^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) struct nfs_subversion nfs_v4 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .nfs_fs = &nfs4_fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .rpc_vers = &nfs_version4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .rpc_ops = &nfs_v4_clientops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .sops = &nfs4_sops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .xattr = nfs4_xattr_handlers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int ret = nfs_write_inode(inode, wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ret = pnfs_layoutcommit_inode(inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) wbc->sync_mode == WB_SYNC_ALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * Clean out any remaining NFSv4 state that might be left over due
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * to open() calls that passed nfs_atomic_lookup, but failed to call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * nfs_open().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static void nfs4_evict_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) truncate_inode_pages_final(&inode->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* If we are holding a delegation, return and free it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) nfs_inode_evict_delegation(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* Note that above delegreturn would trigger pnfs return-on-close */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) pnfs_return_layout(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) pnfs_destroy_layout_final(NFS_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* First call standard NFS clear_inode() code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) nfs_clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) nfs4_xattr_cache_zap(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct nfs_referral_count {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) const struct task_struct *task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) unsigned int referral_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static LIST_HEAD(nfs_referral_count_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static DEFINE_SPINLOCK(nfs_referral_count_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static struct nfs_referral_count *nfs_find_referral_count(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct nfs_referral_count *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) list_for_each_entry(p, &nfs_referral_count_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (p->task == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define NFS_MAX_NESTED_REFERRALS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static int nfs_referral_loop_protect(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct nfs_referral_count *p, *new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) int ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) new = kmalloc(sizeof(*new), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (!new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) new->task = current;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) new->referral_count = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) spin_lock(&nfs_referral_count_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) p = nfs_find_referral_count();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (p->referral_count >= NFS_MAX_NESTED_REFERRALS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ret = -ELOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) p->referral_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) list_add(&new->list, &nfs_referral_count_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) new = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) spin_unlock(&nfs_referral_count_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) kfree(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static void nfs_referral_loop_unprotect(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct nfs_referral_count *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) spin_lock(&nfs_referral_count_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) p = nfs_find_referral_count();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) p->referral_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (p->referral_count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) list_del(&p->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) p = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) spin_unlock(&nfs_referral_count_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int do_nfs4_mount(struct nfs_server *server,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct fs_context *fc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) const char *hostname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) const char *export_path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct nfs_fs_context *root_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct fs_context *root_fc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct vfsmount *root_mnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct fs_parameter param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .key = "source",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .type = fs_value_is_string,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .dirfd = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (IS_ERR(server))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return PTR_ERR(server);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) root_fc = vfs_dup_fs_context(fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (IS_ERR(root_fc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) nfs_free_server(server);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return PTR_ERR(root_fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) kfree(root_fc->source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) root_fc->source = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) root_ctx = nfs_fc2context(root_fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) root_ctx->internal = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) root_ctx->server = server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* We leave export_path unset as it's not used to find the root. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) len = strlen(hostname) + 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) param.string = kmalloc(len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (param.string == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) put_fs_context(root_fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* Does hostname needs to be enclosed in brackets? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (strchr(hostname, ':'))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) param.size = snprintf(param.string, len, "[%s]:/", hostname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) param.size = snprintf(param.string, len, "%s:/", hostname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ret = vfs_parse_fs_param(root_fc, ¶m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) kfree(param.string);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) put_fs_context(root_fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) root_mnt = fc_mount(root_fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) put_fs_context(root_fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (IS_ERR(root_mnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return PTR_ERR(root_mnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) ret = nfs_referral_loop_protect();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) mntput(root_mnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) dentry = mount_subtree(root_mnt, export_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) nfs_referral_loop_unprotect();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (IS_ERR(dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return PTR_ERR(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) fc->root = dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int nfs4_try_get_tree(struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct nfs_fs_context *ctx = nfs_fc2context(fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) dfprintk(MOUNT, "--> nfs4_try_get_tree()\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* We create a mount for the server's root, walk to the requested
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * location and then create another mount for that.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) err= do_nfs4_mount(nfs4_create_server(fc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) fc, ctx->nfs_server.hostname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) ctx->nfs_server.export_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) nfs_ferrorf(fc, MOUNT, "NFS4: Couldn't follow remote path");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) dfprintk(MOUNT, "<-- nfs4_try_get_tree() = %d [error]\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) dfprintk(MOUNT, "<-- nfs4_try_get_tree() = 0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * Create an NFS4 server record on referral traversal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) int nfs4_get_referral_tree(struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct nfs_fs_context *ctx = nfs_fc2context(fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) dprintk("--> nfs4_referral_mount()\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* create a new volume representation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) err = do_nfs4_mount(nfs4_create_referral_server(fc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) fc, ctx->nfs_server.hostname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) ctx->nfs_server.export_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) nfs_ferrorf(fc, MOUNT, "NFS4: Couldn't follow remote path");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = %d [error]\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = 0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int __init init_nfs_v4(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) err = nfs_dns_resolver_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) err = nfs_idmap_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #ifdef CONFIG_NFS_V4_2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) err = nfs4_xattr_cache_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) err = nfs4_register_sysctl();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) #ifdef CONFIG_NFS_V4_2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) nfs42_ssc_register_ops();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) register_nfs_version(&nfs_v4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) nfs_idmap_quit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) nfs_dns_resolver_destroy();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void __exit exit_nfs_v4(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /* Not called in the _init(), conditionally loaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) nfs4_pnfs_v3_ds_connect_unload();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) unregister_nfs_version(&nfs_v4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) #ifdef CONFIG_NFS_V4_2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) nfs4_xattr_cache_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) nfs42_ssc_unregister_ops();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) nfs4_unregister_sysctl();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) nfs_idmap_quit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) nfs_dns_resolver_destroy();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) module_init(init_nfs_v4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) module_exit(exit_nfs_v4);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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