^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * NFS server file handle treatment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Portions Copyright (C) 1999 G. Allen Morris III <gam3@acm.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Extensive rewrite by Neil Brown <neilb@cse.unsw.edu.au> Southern-Spring 1999
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * ... and again Southern-Winter 2001 to support export_operations
^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) #include <linux/exportfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sunrpc/svcauth_gss.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "nfsd.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "vfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "auth.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define NFSDDBG_FACILITY NFSDDBG_FH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * our acceptability function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * if NOSUBTREECHECK, accept anything
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * if not, require that we can walk up to exp->ex_dentry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * doing some checks on the 'x' bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int nfsd_acceptable(void *expv, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct svc_export *exp = expv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct dentry *tdentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct dentry *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) tdentry = dget(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) while (tdentry != exp->ex_path.dentry && !IS_ROOT(tdentry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /* make sure parents give x permission to user */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) parent = dget_parent(tdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) err = inode_permission(d_inode(parent), MAY_EXEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) dput(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) dput(tdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) tdentry = parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (tdentry != exp->ex_path.dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) dprintk("nfsd_acceptable failed at %p %pd\n", tdentry, tdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) rv = (tdentry == exp->ex_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) dput(tdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return rv;
^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) /* Type check. The correct error return for type mismatches does not seem to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * generally agreed upon. SunOS seems to use EISDIR if file isn't S_IFREG; a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * comment in the NFSv3 spec says this is incorrect (implementation notes for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * the write call).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static inline __be32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) nfsd_mode_check(struct svc_rqst *rqstp, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) umode_t requested)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) umode_t mode = d_inode(dentry)->i_mode & S_IFMT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (requested == 0) /* the caller doesn't care */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return nfs_ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (mode == requested) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (mode == S_IFDIR && !d_can_lookup(dentry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return nfserr_notdir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return nfs_ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * v4 has an error more specific than err_notdir which we should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * return in preference to err_notdir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (rqstp->rq_vers == 4 && mode == S_IFLNK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return nfserr_symlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (requested == S_IFDIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return nfserr_notdir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (mode == S_IFDIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return nfserr_isdir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return nfserr_inval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static bool nfsd_originating_port_ok(struct svc_rqst *rqstp, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (flags & NFSEXP_INSECURE_PORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* We don't require gss requests to use low ports: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (rqstp->rq_cred.cr_flavor >= RPC_AUTH_GSS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return test_bit(RQ_SECURE, &rqstp->rq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct svc_export *exp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int flags = nfsexp_flags(rqstp, exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Check if the request originated from a secure port. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!nfsd_originating_port_ok(rqstp, flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) dprintk("nfsd: request from insecure port %s!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) svc_print_addr(rqstp, buf, sizeof(buf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return nfserr_perm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* Set user creds for this exportpoint */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return nfserrno(nfsd_setuser(rqstp, exp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static inline __be32 check_pseudo_root(struct svc_rqst *rqstp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct dentry *dentry, struct svc_export *exp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (!(exp->ex_flags & NFSEXP_V4ROOT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return nfs_ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * v2/v3 clients have no need for the V4ROOT export--they use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * the mount protocl instead; also, further V4ROOT checks may be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * in v4-specific code, in which case v2/v3 clients could bypass
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!nfsd_v4client(rqstp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return nfserr_stale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * We're exposing only the directories and symlinks that have to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * traversed on the way to real exports:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (unlikely(!d_is_dir(dentry) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) !d_is_symlink(dentry)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return nfserr_stale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * A pseudoroot export gives permission to access only one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * single directory; the kernel has to make another upcall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * before granting access to anything else under it:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (unlikely(dentry != exp->ex_path.dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return nfserr_stale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return nfs_ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^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) * Use the given filehandle to look up the corresponding export and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * dentry. On success, the results are used to set fh_export and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * fh_dentry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct knfsd_fh *fh = &fhp->fh_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct fid *fid = NULL, sfid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct svc_export *exp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) int fileid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int data_left = fh->fh_size/4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) __be32 error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) error = nfserr_stale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (rqstp->rq_vers > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) error = nfserr_badhandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (rqstp->rq_vers == 4 && fh->fh_size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return nfserr_nofilehandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (fh->fh_version == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (--data_left < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (fh->fh_auth_type != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) len = key_len(fh->fh_fsid_type) / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* deprecated, convert to type 3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) len = key_len(FSID_ENCODE_DEV)/4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) fh->fh_fsid_type = FSID_ENCODE_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * struct knfsd_fh uses host-endian fields, which are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * sometimes used to hold net-endian values. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * confuses sparse, so we must use __force here to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * keep it from complaining.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) ntohl((__force __be32)fh->fh_fsid[1])));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) fh->fh_fsid[1] = fh->fh_fsid[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) data_left -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (data_left < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) exp = rqst_exp_find(rqstp, fh->fh_fsid_type, fh->fh_fsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) fid = (struct fid *)(fh->fh_fsid + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) __u32 tfh[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) dev_t xdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ino_t xino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (fh->fh_size != NFS_FHSIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* assume old filehandle format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) xdev = old_decode_dev(fh->ofh_xdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) xino = u32_to_ino_t(fh->ofh_xino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) exp = rqst_exp_find(rqstp, FSID_DEV, tfh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) error = nfserr_stale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (IS_ERR(exp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) trace_nfsd_set_fh_dentry_badexport(rqstp, fhp, PTR_ERR(exp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (PTR_ERR(exp) == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return nfserrno(PTR_ERR(exp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* Elevate privileges so that the lack of 'r' or 'x'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * permission on some parent directory will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * not stop exportfs_decode_fh from being able
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * to reconnect a directory into the dentry cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * The same problem can affect "SUBTREECHECK" exports,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * but as nfsd_acceptable depends on correct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * access control settings being in effect, we cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * fix that case easily.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct cred *new = prepare_creds();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!new) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) error = nfserrno(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) new->cap_effective =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) cap_raise_nfsd_set(new->cap_effective,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) new->cap_permitted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) put_cred(override_creds(new));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) put_cred(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) error = nfsd_setuser_and_check_port(rqstp, exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * Look up the dentry using the NFS file handle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) error = nfserr_stale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (rqstp->rq_vers > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) error = nfserr_badhandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (fh->fh_version != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) sfid.i32.ino = fh->ofh_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) sfid.i32.gen = fh->ofh_generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) sfid.i32.parent_ino = fh->ofh_dirino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) fid = &sfid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) data_left = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (fh->ofh_dirino == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) fileid_type = FILEID_INO32_GEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) fileid_type = FILEID_INO32_GEN_PARENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) fileid_type = fh->fh_fileid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (fileid_type == FILEID_ROOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) dentry = dget(exp->ex_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) dentry = exportfs_decode_fh(exp->ex_path.mnt, fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) data_left, fileid_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) nfsd_acceptable, exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (IS_ERR_OR_NULL(dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) trace_nfsd_set_fh_dentry_badhandle(rqstp, fhp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) dentry ? PTR_ERR(dentry) : -ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (dentry == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (IS_ERR(dentry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (PTR_ERR(dentry) != -EINVAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) error = nfserrno(PTR_ERR(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (d_is_dir(dentry) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) (dentry->d_flags & DCACHE_DISCONNECTED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) printk("nfsd: find_fh_dentry returned a DISCONNECTED directory: %pd2\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) fhp->fh_dentry = dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) fhp->fh_export = exp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) exp_put(exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * fh_verify - filehandle lookup and access checking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * @rqstp: pointer to current rpc request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * @fhp: filehandle to be verified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * @type: expected type of object pointed to by filehandle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * @access: type of access needed to object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * Look up a dentry from the on-the-wire filehandle, check the client's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * access to the export, and set the current task's credentials.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * Regardless of success or failure of fh_verify(), fh_put() should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * called on @fhp when the caller is finished with the filehandle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * fh_verify() may be called multiple times on a given filehandle, for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * example, when processing an NFSv4 compound. The first call will look
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * up a dentry using the on-the-wire filehandle. Subsequent calls will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * skip the lookup and just perform the other checks and possibly change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * the current task's credentials.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * @type specifies the type of object expected using one of the S_IF*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * constants defined in include/linux/stat.h. The caller may use zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * to indicate that it doesn't care, or a negative integer to indicate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * that it expects something not of the given type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * @access is formed from the NFSD_MAY_* constants defined in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * fs/nfsd/vfs.h.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) __be32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) struct svc_export *exp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) __be32 error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) dprintk("nfsd: fh_verify(%s)\n", SVCFH_fmt(fhp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (!fhp->fh_dentry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) error = nfsd_set_fh_dentry(rqstp, fhp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) dentry = fhp->fh_dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) exp = fhp->fh_export;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * We still have to do all these permission checks, even when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * fh_dentry is already set:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * - fh_verify may be called multiple times with different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * "access" arguments (e.g. nfsd_proc_create calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * fh_verify(...,NFSD_MAY_EXEC) first, then later (in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) * nfsd_create) calls fh_verify(...,NFSD_MAY_CREATE).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * - in the NFSv4 case, the filehandle may have been filled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * in by fh_compose, and given a dentry, but further
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * compound operations performed with that filehandle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * still need permissions checks. In the worst case, a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * mountpoint crossing may have changed the export
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) * options, and we may now need to use a different uid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * (for example, if different id-squashing options are in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * effect on the new filesystem).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) error = check_pseudo_root(rqstp, dentry, exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) error = nfsd_setuser_and_check_port(rqstp, exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) error = nfsd_mode_check(rqstp, dentry, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) goto out;
^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) * pseudoflavor restrictions are not enforced on NLM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * which clients virtually always use auth_sys for,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * even while using RPCSEC_GSS for NFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (access & NFSD_MAY_LOCK || access & NFSD_MAY_BYPASS_GSS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) goto skip_pseudoflavor_check;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * Clients may expect to be able to use auth_sys during mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * even if they use gss for everything else; see section 2.3.2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * of rfc 2623.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (access & NFSD_MAY_BYPASS_GSS_ON_ROOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) && exp->ex_path.dentry == dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) goto skip_pseudoflavor_check;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) error = check_nfsd_access(exp, rqstp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) skip_pseudoflavor_check:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* Finally, check access permissions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) error = nfsd_permission(rqstp, exp, dentry, access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) dprintk("fh_verify: %pd2 permission failure, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) "acc=%x, error=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) access, ntohl(error));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (error == nfserr_stale)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) nfsdstats.fh_stale++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * Compose a file handle for an NFS reply.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * Note that when first composed, the dentry may not yet have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * an inode. In this case a call to fh_update should be made
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * before the fh goes out on the wire ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static void _fh_update(struct svc_fh *fhp, struct svc_export *exp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (dentry != exp->ex_path.dentry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) struct fid *fid = (struct fid *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) (fhp->fh_handle.fh_fsid + fhp->fh_handle.fh_size/4 - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) int maxsize = (fhp->fh_maxsize - fhp->fh_handle.fh_size)/4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) int subtreecheck = !(exp->ex_flags & NFSEXP_NOSUBTREECHECK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) fhp->fh_handle.fh_fileid_type =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) exportfs_encode_fh(dentry, fid, &maxsize, subtreecheck);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) fhp->fh_handle.fh_size += maxsize * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) fhp->fh_handle.fh_fileid_type = FILEID_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * for composing old style file handles
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) static inline void _fh_update_old(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct svc_export *exp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct knfsd_fh *fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) fh->ofh_ino = ino_t_to_u32(d_inode(dentry)->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) fh->ofh_generation = d_inode(dentry)->i_generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (d_is_dir(dentry) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) (exp->ex_flags & NFSEXP_NOSUBTREECHECK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) fh->ofh_dirino = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static bool is_root_export(struct svc_export *exp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) static struct super_block *exp_sb(struct svc_export *exp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return exp->ex_path.dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static bool fsid_type_ok_for_exp(u8 fsid_type, struct svc_export *exp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) switch (fsid_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) case FSID_DEV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (!old_valid_dev(exp_sb(exp)->s_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) case FSID_MAJOR_MINOR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) case FSID_ENCODE_DEV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return exp_sb(exp)->s_type->fs_flags & FS_REQUIRES_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) case FSID_NUM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return exp->ex_flags & NFSEXP_FSID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) case FSID_UUID8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) case FSID_UUID16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (!is_root_export(exp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) case FSID_UUID4_INUM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) case FSID_UUID16_INUM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return exp->ex_uuid != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static void set_version_and_fsid_type(struct svc_fh *fhp, struct svc_export *exp, struct svc_fh *ref_fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) u8 version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) u8 fsid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) version = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (ref_fh && ref_fh->fh_export == exp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) version = ref_fh->fh_handle.fh_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) fsid_type = ref_fh->fh_handle.fh_fsid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) ref_fh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) switch (version) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) case 0xca:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) fsid_type = FSID_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) * As the fsid -> filesystem mapping was guided by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * user-space, there is no guarantee that the filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * actually supports that fsid type. If it doesn't we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * loop around again without ref_fh set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (!fsid_type_ok_for_exp(fsid_type, exp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) } else if (exp->ex_flags & NFSEXP_FSID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) fsid_type = FSID_NUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) } else if (exp->ex_uuid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (fhp->fh_maxsize >= 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (is_root_export(exp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) fsid_type = FSID_UUID16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) fsid_type = FSID_UUID16_INUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if (is_root_export(exp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) fsid_type = FSID_UUID8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) fsid_type = FSID_UUID4_INUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) } else if (!old_valid_dev(exp_sb(exp)->s_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) /* for newer device numbers, we must use a newer fsid format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) fsid_type = FSID_ENCODE_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) fsid_type = FSID_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) fhp->fh_handle.fh_version = version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) fhp->fh_handle.fh_fsid_type = fsid_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) __be32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct svc_fh *ref_fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) /* ref_fh is a reference file handle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * if it is non-null and for the same filesystem, then we should compose
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) * a filehandle which is of the same version, where possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) * Currently, that means that if ref_fh->fh_handle.fh_version == 0xca
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) * Then create a 32byte filehandle using nfs_fhbase_old
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) struct inode * inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) dev_t ex_dev = exp_sb(exp)->s_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %pd2, ino=%ld)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) MAJOR(ex_dev), MINOR(ex_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) (long) d_inode(exp->ex_path.dentry)->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) (inode ? inode->i_ino : 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) /* Choose filehandle version and fsid type based on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * the reference filehandle (if it is in the same export)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * or the export options.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) set_version_and_fsid_type(fhp, exp, ref_fh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (ref_fh == fhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) fh_put(ref_fh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (fhp->fh_locked || fhp->fh_dentry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) printk(KERN_ERR "fh_compose: fh %pd2 not initialized!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (fhp->fh_maxsize < NFS_FHSIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) printk(KERN_ERR "fh_compose: called with maxsize %d! %pd2\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) fhp->fh_maxsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) fhp->fh_dentry = dget(dentry); /* our internal copy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) fhp->fh_export = exp_get(exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (fhp->fh_handle.fh_version == 0xca) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) /* old style filehandle please */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) fhp->fh_handle.fh_size = NFS_FHSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) fhp->fh_handle.ofh_dcookie = 0xfeebbaca;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) fhp->fh_handle.ofh_dev = old_encode_dev(ex_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) fhp->fh_handle.ofh_xino =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) ino_t_to_u32(d_inode(exp->ex_path.dentry)->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) _fh_update_old(dentry, exp, &fhp->fh_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) fhp->fh_handle.fh_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) key_len(fhp->fh_handle.fh_fsid_type) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) fhp->fh_handle.fh_auth_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) mk_fsid(fhp->fh_handle.fh_fsid_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) fhp->fh_handle.fh_fsid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) ex_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) d_inode(exp->ex_path.dentry)->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) exp->ex_fsid, exp->ex_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if (inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) _fh_update(fhp, exp, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) fh_put(fhp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) return nfserr_opnotsupp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * Update file handle information after changing a dentry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * This is only called by nfsd_create, nfsd_create_v3 and nfsd_proc_create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) __be32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) fh_update(struct svc_fh *fhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) if (!fhp->fh_dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) goto out_bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) dentry = fhp->fh_dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) if (d_really_is_negative(dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) goto out_negative;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (fhp->fh_handle.fh_version != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) _fh_update_old(dentry, fhp->fh_export, &fhp->fh_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (fhp->fh_handle.fh_fileid_type != FILEID_ROOT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) _fh_update(fhp, fhp->fh_export, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return nfserr_opnotsupp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) out_bad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) printk(KERN_ERR "fh_update: fh not verified!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) return nfserr_serverfault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) out_negative:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) printk(KERN_ERR "fh_update: %pd2 still negative!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return nfserr_serverfault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
^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) * Release a file handle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) fh_put(struct svc_fh *fhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct dentry * dentry = fhp->fh_dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) struct svc_export * exp = fhp->fh_export;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if (dentry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) fh_unlock(fhp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) fhp->fh_dentry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) dput(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) fh_clear_wcc(fhp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) fh_drop_write(fhp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) if (exp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) exp_put(exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) fhp->fh_export = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) * Shorthand for dprintk()'s
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) char * SVCFH_fmt(struct svc_fh *fhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) struct knfsd_fh *fh = &fhp->fh_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) static char buf[80];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) sprintf(buf, "%d: %08x %08x %08x %08x %08x %08x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) fh->fh_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) fh->fh_base.fh_pad[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) fh->fh_base.fh_pad[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) fh->fh_base.fh_pad[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) fh->fh_base.fh_pad[3],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) fh->fh_base.fh_pad[4],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) fh->fh_base.fh_pad[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) return buf;
^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) enum fsid_source fsid_source(struct svc_fh *fhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (fhp->fh_handle.fh_version != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return FSIDSOURCE_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) switch(fhp->fh_handle.fh_fsid_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) case FSID_DEV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) case FSID_ENCODE_DEV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) case FSID_MAJOR_MINOR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (exp_sb(fhp->fh_export)->s_type->fs_flags & FS_REQUIRES_DEV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return FSIDSOURCE_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) case FSID_NUM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (fhp->fh_export->ex_flags & NFSEXP_FSID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) return FSIDSOURCE_FSID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) /* either a UUID type filehandle, or the filehandle doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * match the export.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (fhp->fh_export->ex_flags & NFSEXP_FSID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) return FSIDSOURCE_FSID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) if (fhp->fh_export->ex_uuid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) return FSIDSOURCE_UUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) return FSIDSOURCE_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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