diff options
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 984 |
1 files changed, 984 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c new file mode 100644 index 000000000000..e8158741e8b5 --- /dev/null +++ b/fs/nfsd/nfs4proc.c @@ -0,0 +1,984 @@ +/* + * fs/nfsd/nfs4proc.c + * + * Server-side procedures for NFSv4. + * + * Copyright (c) 2002 The Regents of the University of Michigan. + * All rights reserved. + * + * Kendrick Smith <kmsmith@umich.edu> + * Andy Adamson <andros@umich.edu> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Note: some routines in this file are just trivial wrappers + * (e.g. nfsd4_lookup()) defined solely for the sake of consistent + * naming. Since all such routines have been declared "inline", + * there shouldn't be any associated overhead. At some point in + * the future, I might inline these "by hand" to clean up a + * little. + */ + +#include <linux/param.h> +#include <linux/major.h> +#include <linux/slab.h> + +#include <linux/sunrpc/svc.h> +#include <linux/nfsd/nfsd.h> +#include <linux/nfsd/cache.h> +#include <linux/nfs4.h> +#include <linux/nfsd/state.h> +#include <linux/nfsd/xdr4.h> +#include <linux/nfs4_acl.h> + +#define NFSDDBG_FACILITY NFSDDBG_PROC + +static inline void +fh_dup2(struct svc_fh *dst, struct svc_fh *src) +{ + fh_put(dst); + dget(src->fh_dentry); + if (src->fh_export) + cache_get(&src->fh_export->h); + *dst = *src; +} + +static int +do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) +{ + int accmode, status; + + if (open->op_truncate && + !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) + return nfserr_inval; + + accmode = MAY_NOP; + if (open->op_share_access & NFS4_SHARE_ACCESS_READ) + accmode = MAY_READ; + if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE) + accmode |= (MAY_WRITE | MAY_TRUNC); + accmode |= MAY_OWNER_OVERRIDE; + + status = fh_verify(rqstp, current_fh, S_IFREG, accmode); + + return status; +} + +static int +do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) +{ + struct svc_fh resfh; + int status; + + fh_init(&resfh, NFS4_FHSIZE); + open->op_truncate = 0; + + if (open->op_create) { + /* + * Note: create modes (UNCHECKED,GUARDED...) are the same + * in NFSv4 as in v3. + */ + status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, + open->op_fname.len, &open->op_iattr, + &resfh, open->op_createmode, + (u32 *)open->op_verf.data, &open->op_truncate); + } + else { + status = nfsd_lookup(rqstp, current_fh, + open->op_fname.data, open->op_fname.len, &resfh); + fh_unlock(current_fh); + } + + if (!status) { + set_change_info(&open->op_cinfo, current_fh); + + /* set reply cache */ + fh_dup2(current_fh, &resfh); + open->op_stateowner->so_replay.rp_openfh_len = + resfh.fh_handle.fh_size; + memcpy(open->op_stateowner->so_replay.rp_openfh, + &resfh.fh_handle.fh_base, + resfh.fh_handle.fh_size); + + status = do_open_permission(rqstp, current_fh, open); + } + + fh_put(&resfh); + return status; +} + +static int +do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) +{ + int status; + + /* Only reclaims from previously confirmed clients are valid */ + if ((status = nfs4_check_open_reclaim(&open->op_clientid))) + return status; + + /* We don't know the target directory, and therefore can not + * set the change info + */ + + memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); + + /* set replay cache */ + open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size; + memcpy(open->op_stateowner->so_replay.rp_openfh, + ¤t_fh->fh_handle.fh_base, + current_fh->fh_handle.fh_size); + + open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && + (open->op_iattr.ia_size == 0); + + status = do_open_permission(rqstp, current_fh, open); + + return status; +} + + +static inline int +nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) +{ + int status; + dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", + (int)open->op_fname.len, open->op_fname.data, + open->op_stateowner); + + if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) + return nfserr_grace; + + if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) + return nfserr_no_grace; + + /* This check required by spec. */ + if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) + return nfserr_inval; + + nfs4_lock_state(); + + /* check seqid for replay. set nfs4_owner */ + status = nfsd4_process_open1(open); + if (status == NFSERR_REPLAY_ME) { + struct nfs4_replay *rp = &open->op_stateowner->so_replay; + fh_put(current_fh); + current_fh->fh_handle.fh_size = rp->rp_openfh_len; + memcpy(¤t_fh->fh_handle.fh_base, rp->rp_openfh, + rp->rp_openfh_len); + status = fh_verify(rqstp, current_fh, 0, MAY_NOP); + if (status) + dprintk("nfsd4_open: replay failed" + " restoring previous filehandle\n"); + else + status = NFSERR_REPLAY_ME; + } + if (status) + goto out; + switch (open->op_claim_type) { + case NFS4_OPEN_CLAIM_NULL: + /* + * (1) set CURRENT_FH to the file being opened, + * creating it if necessary, (2) set open->op_cinfo, + * (3) set open->op_truncate if the file is to be + * truncated after opening, (4) do permission checking. + */ + status = do_open_lookup(rqstp, current_fh, open); + if (status) + goto out; + break; + case NFS4_OPEN_CLAIM_PREVIOUS: + /* + * The CURRENT_FH is already set to the file being + * opened. (1) set open->op_cinfo, (2) set + * open->op_truncate if the file is to be truncated + * after opening, (3) do permission checking. + */ + status = do_open_fhandle(rqstp, current_fh, open); + if (status) + goto out; + break; + case NFS4_OPEN_CLAIM_DELEGATE_CUR: + case NFS4_OPEN_CLAIM_DELEGATE_PREV: + printk("NFSD: unsupported OPEN claim type %d\n", + open->op_claim_type); + status = nfserr_notsupp; + goto out; + default: + printk("NFSD: Invalid OPEN claim type %d\n", + open->op_claim_type); + status = nfserr_inval; + goto out; + } + /* + * nfsd4_process_open2() does the actual opening of the file. If + * successful, it (1) truncates the file if open->op_truncate was + * set, (2) sets open->op_stateid, (3) sets open->op_delegation. + */ + status = nfsd4_process_open2(rqstp, current_fh, open); +out: + if (open->op_stateowner) + nfs4_get_stateowner(open->op_stateowner); + nfs4_unlock_state(); + return status; +} + +/* + * filehandle-manipulating ops. + */ +static inline int +nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh) +{ + if (!current_fh->fh_dentry) + return nfserr_nofilehandle; + + *getfh = current_fh; + return nfs_ok; +} + +static inline int +nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh) +{ + fh_put(current_fh); + current_fh->fh_handle.fh_size = putfh->pf_fhlen; + memcpy(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen); + return fh_verify(rqstp, current_fh, 0, MAY_NOP); +} + +static inline int +nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh) +{ + int status; + + fh_put(current_fh); + status = exp_pseudoroot(rqstp->rq_client, current_fh, + &rqstp->rq_chandle); + if (!status) + status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export)); + return status; +} + +static inline int +nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh) +{ + if (!save_fh->fh_dentry) + return nfserr_restorefh; + + fh_dup2(current_fh, save_fh); + return nfs_ok; +} + +static inline int +nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh) +{ + if (!current_fh->fh_dentry) + return nfserr_nofilehandle; + + fh_dup2(save_fh, current_fh); + return nfs_ok; +} + +/* + * misc nfsv4 ops + */ +static inline int +nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access) +{ + if (access->ac_req_access & ~NFS3_ACCESS_FULL) + return nfserr_inval; + + access->ac_resp_access = access->ac_req_access; + return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported); +} + +static inline int +nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit) +{ + int status; + + u32 *p = (u32 *)commit->co_verf.data; + *p++ = nfssvc_boot.tv_sec; + *p++ = nfssvc_boot.tv_usec; + + status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count); + if (status == nfserr_symlink) + status = nfserr_inval; + return status; +} + +static int +nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create) +{ + struct svc_fh resfh; + int status; + dev_t rdev; + + fh_init(&resfh, NFS4_FHSIZE); + + status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE); + if (status == nfserr_symlink) + status = nfserr_notdir; + if (status) + return status; + + switch (create->cr_type) { + case NF4LNK: + /* ugh! we have to null-terminate the linktext, or + * vfs_symlink() will choke. it is always safe to + * null-terminate by brute force, since at worst we + * will overwrite the first byte of the create namelen + * in the XDR buffer, which has already been extracted + * during XDR decode. + */ + create->cr_linkname[create->cr_linklen] = 0; + + status = nfsd_symlink(rqstp, current_fh, create->cr_name, + create->cr_namelen, create->cr_linkname, + create->cr_linklen, &resfh, &create->cr_iattr); + break; + + case NF4BLK: + rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); + if (MAJOR(rdev) != create->cr_specdata1 || + MINOR(rdev) != create->cr_specdata2) + return nfserr_inval; + status = nfsd_create(rqstp, current_fh, create->cr_name, + create->cr_namelen, &create->cr_iattr, + S_IFBLK, rdev, &resfh); + break; + + case NF4CHR: + rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); + if (MAJOR(rdev) != create->cr_specdata1 || + MINOR(rdev) != create->cr_specdata2) + return nfserr_inval; + status = nfsd_create(rqstp, current_fh, create->cr_name, + create->cr_namelen, &create->cr_iattr, + S_IFCHR, rdev, &resfh); + break; + + case NF4SOCK: + status = nfsd_create(rqstp, current_fh, create->cr_name, + create->cr_namelen, &create->cr_iattr, + S_IFSOCK, 0, &resfh); + break; + + case NF4FIFO: + status = nfsd_create(rqstp, current_fh, create->cr_name, + create->cr_namelen, &create->cr_iattr, + S_IFIFO, 0, &resfh); + break; + + case NF4DIR: + create->cr_iattr.ia_valid &= ~ATTR_SIZE; + status = nfsd_create(rqstp, current_fh, create->cr_name, + create->cr_namelen, &create->cr_iattr, + S_IFDIR, 0, &resfh); + break; + + default: + status = nfserr_badtype; + } + + if (!status) { + fh_unlock(current_fh); + set_change_info(&create->cr_cinfo, current_fh); + fh_dup2(current_fh, &resfh); + } + + fh_put(&resfh); + return status; +} + +static inline int +nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr) +{ + int status; + + status = fh_verify(rqstp, current_fh, 0, MAY_NOP); + if (status) + return status; + + if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) + return nfserr_inval; + + getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; + getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; + + getattr->ga_fhp = current_fh; + return nfs_ok; +} + +static inline int +nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh, + struct svc_fh *save_fh, struct nfsd4_link *link) +{ + int status = nfserr_nofilehandle; + + if (!save_fh->fh_dentry) + return status; + status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh); + if (!status) + set_change_info(&link->li_cinfo, current_fh); + return status; +} + +static int +nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh) +{ + struct svc_fh tmp_fh; + int ret; + + fh_init(&tmp_fh, NFS4_FHSIZE); + if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh, + &rqstp->rq_chandle)) != 0) + return ret; + if (tmp_fh.fh_dentry == current_fh->fh_dentry) { + fh_put(&tmp_fh); + return nfserr_noent; + } + fh_put(&tmp_fh); + return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh); +} + +static inline int +nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup) +{ + return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh); +} + +static inline int +nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read) +{ + int status; + struct file *filp = NULL; + + /* no need to check permission - this will be done in nfsd_read() */ + + if (read->rd_offset >= OFFSET_MAX) + return nfserr_inval; + + nfs4_lock_state(); + /* check stateid */ + if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid, + CHECK_FH | RD_STATE, &filp))) { + dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); + goto out; + } + status = nfs_ok; +out: + nfs4_unlock_state(); + read->rd_rqstp = rqstp; + read->rd_fhp = current_fh; + read->rd_filp = filp; + return status; +} + +static inline int +nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir) +{ + u64 cookie = readdir->rd_cookie; + static const nfs4_verifier zeroverf; + + /* no need to check permission - this will be done in nfsd_readdir() */ + + if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) + return nfserr_inval; + + readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; + readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; + + if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || + (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) + return nfserr_bad_cookie; + + readdir->rd_rqstp = rqstp; + readdir->rd_fhp = current_fh; + return nfs_ok; +} + +static inline int +nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink) +{ + readlink->rl_rqstp = rqstp; + readlink->rl_fhp = current_fh; + return nfs_ok; +} + +static inline int +nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove) +{ + int status; + + status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen); + if (status == nfserr_symlink) + return nfserr_notdir; + if (!status) { + fh_unlock(current_fh); + set_change_info(&remove->rm_cinfo, current_fh); + } + return status; +} + +static inline int +nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh, + struct svc_fh *save_fh, struct nfsd4_rename *rename) +{ + int status = nfserr_nofilehandle; + + if (!save_fh->fh_dentry) + return status; + status = nfsd_rename(rqstp, save_fh, rename->rn_sname, + rename->rn_snamelen, current_fh, + rename->rn_tname, rename->rn_tnamelen); + + /* the underlying filesystem returns different error's than required + * by NFSv4. both save_fh and current_fh have been verified.. */ + if (status == nfserr_isdir) + status = nfserr_exist; + else if ((status == nfserr_notdir) && + (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) && + S_ISDIR(current_fh->fh_dentry->d_inode->i_mode))) + status = nfserr_exist; + else if (status == nfserr_symlink) + status = nfserr_notdir; + + if (!status) { + set_change_info(&rename->rn_sinfo, current_fh); + set_change_info(&rename->rn_tinfo, save_fh); + } + return status; +} + +static inline int +nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr) +{ + int status = nfs_ok; + + if (!current_fh->fh_dentry) + return nfserr_nofilehandle; + + status = nfs_ok; + if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { + nfs4_lock_state(); + if ((status = nfs4_preprocess_stateid_op(current_fh, + &setattr->sa_stateid, + CHECK_FH | WR_STATE, NULL))) { + dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); + goto out_unlock; + } + nfs4_unlock_state(); + } + status = nfs_ok; + if (setattr->sa_acl != NULL) + status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl); + if (status) + goto out; + status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr, + 0, (time_t)0); +out: + return status; +out_unlock: + nfs4_unlock_state(); + return status; +} + +static inline int +nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write) +{ + stateid_t *stateid = &write->wr_stateid; + struct file *filp = NULL; + u32 *p; + int status = nfs_ok; + + /* no need to check permission - this will be done in nfsd_write() */ + + if (write->wr_offset >= OFFSET_MAX) + return nfserr_inval; + + nfs4_lock_state(); + if ((status = nfs4_preprocess_stateid_op(current_fh, stateid, + CHECK_FH | WR_STATE, &filp))) { + dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); + goto out; + } + nfs4_unlock_state(); + + write->wr_bytes_written = write->wr_buflen; + write->wr_how_written = write->wr_stable_how; + p = (u32 *)write->wr_verifier.data; + *p++ = nfssvc_boot.tv_sec; + *p++ = nfssvc_boot.tv_usec; + + status = nfsd_write(rqstp, current_fh, filp, write->wr_offset, + write->wr_vec, write->wr_vlen, write->wr_buflen, + &write->wr_how_written); + + if (status == nfserr_symlink) + status = nfserr_inval; + return status; +out: + nfs4_unlock_state(); + return status; +} + +/* This routine never returns NFS_OK! If there are no other errors, it + * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the + * attributes matched. VERIFY is implemented by mapping NFSERR_SAME + * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. + */ +static int +nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify) +{ + u32 *buf, *p; + int count; + int status; + + status = fh_verify(rqstp, current_fh, 0, MAY_NOP); + if (status) + return status; + + if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) + || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) + return nfserr_attrnotsupp; + if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) + || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) + return nfserr_inval; + if (verify->ve_attrlen & 3) + return nfserr_inval; + + /* count in words: + * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 + */ + count = 4 + (verify->ve_attrlen >> 2); + buf = kmalloc(count << 2, GFP_KERNEL); + if (!buf) + return nfserr_resource; + + status = nfsd4_encode_fattr(current_fh, current_fh->fh_export, + current_fh->fh_dentry, buf, + &count, verify->ve_bmval, + rqstp); + + /* this means that nfsd4_encode_fattr() ran out of space */ + if (status == nfserr_resource && count == 0) + status = nfserr_not_same; + if (status) + goto out_kfree; + + p = buf + 3; + status = nfserr_not_same; + if (ntohl(*p++) != verify->ve_attrlen) + goto out_kfree; + if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) + status = nfserr_same; + +out_kfree: + kfree(buf); + return status; +} + +/* + * NULL call. + */ +static int +nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) +{ + return nfs_ok; +} + + +/* + * COMPOUND call. + */ +static int +nfsd4_proc_compound(struct svc_rqst *rqstp, + struct nfsd4_compoundargs *args, + struct nfsd4_compoundres *resp) +{ + struct nfsd4_op *op; + struct svc_fh *current_fh = NULL; + struct svc_fh *save_fh = NULL; + struct nfs4_stateowner *replay_owner = NULL; + int slack_space; /* in words, not bytes! */ + int status; + + status = nfserr_resource; + current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL); + if (current_fh == NULL) + goto out; + fh_init(current_fh, NFS4_FHSIZE); + save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL); + if (save_fh == NULL) + goto out; + fh_init(save_fh, NFS4_FHSIZE); + + resp->xbuf = &rqstp->rq_res; + resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len; + resp->tagp = resp->p; + /* reserve space for: taglen, tag, and opcnt */ + resp->p += 2 + XDR_QUADLEN(args->taglen); + resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; + resp->taglen = args->taglen; + resp->tag = args->tag; + resp->opcnt = 0; + resp->rqstp = rqstp; + + /* + * According to RFC3010, this takes precedence over all other errors. + */ + status = nfserr_minor_vers_mismatch; + if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION) + goto out; + + status = nfs_ok; + while (!status && resp->opcnt < args->opcnt) { + op = &args->ops[resp->opcnt++]; + + /* + * The XDR decode routines may have pre-set op->status; + * for example, if there is a miscellaneous XDR error + * it will be set to nfserr_bad_xdr. + */ + if (op->status) + goto encode_op; + + /* We must be able to encode a successful response to + * this operation, with enough room left over to encode a + * failed response to the next operation. If we don't + * have enough room, fail with ERR_RESOURCE. + */ +/* FIXME - is slack_space *really* words, or bytes??? - neilb */ + slack_space = (char *)resp->end - (char *)resp->p; + if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) { + BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE); + op->status = nfserr_resource; + goto encode_op; + } + + /* All operations except RENEW, SETCLIENTID, RESTOREFH + * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH + * require a valid current filehandle + * + * SETATTR NOFILEHANDLE error handled in nfsd4_setattr + * due to required returned bitmap argument + */ + if ((!current_fh->fh_dentry) && + !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) || + (op->opnum == OP_SETCLIENTID) || + (op->opnum == OP_SETCLIENTID_CONFIRM) || + (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) || + (op->opnum == OP_RELEASE_LOCKOWNER) || + (op->opnum == OP_SETATTR))) { + op->status = nfserr_nofilehandle; + goto encode_op; + } + switch (op->opnum) { + case OP_ACCESS: + op->status = nfsd4_access(rqstp, current_fh, &op->u.access); + break; + case OP_CLOSE: + op->status = nfsd4_close(rqstp, current_fh, &op->u.close); + replay_owner = op->u.close.cl_stateowner; + break; + case OP_COMMIT: + op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit); + break; + case OP_CREATE: + op->status = nfsd4_create(rqstp, current_fh, &op->u.create); + break; + case OP_DELEGRETURN: + op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn); + break; + case OP_GETATTR: + op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr); + break; + case OP_GETFH: + op->status = nfsd4_getfh(current_fh, &op->u.getfh); + break; + case OP_LINK: + op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link); + break; + case OP_LOCK: + op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock); + replay_owner = op->u.lock.lk_stateowner; + break; + case OP_LOCKT: + op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt); + break; + case OP_LOCKU: + op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku); + replay_owner = op->u.locku.lu_stateowner; + break; + case OP_LOOKUP: + op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup); + break; + case OP_LOOKUPP: + op->status = nfsd4_lookupp(rqstp, current_fh); + break; + case OP_NVERIFY: + op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify); + if (op->status == nfserr_not_same) + op->status = nfs_ok; + break; + case OP_OPEN: + op->status = nfsd4_open(rqstp, current_fh, &op->u.open); + replay_owner = op->u.open.op_stateowner; + break; + case OP_OPEN_CONFIRM: + op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm); + replay_owner = op->u.open_confirm.oc_stateowner; + break; + case OP_OPEN_DOWNGRADE: + op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade); + replay_owner = op->u.open_downgrade.od_stateowner; + break; + case OP_PUTFH: + op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh); + break; + case OP_PUTROOTFH: + op->status = nfsd4_putrootfh(rqstp, current_fh); + break; + case OP_READ: + op->status = nfsd4_read(rqstp, current_fh, &op->u.read); + break; + case OP_READDIR: + op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir); + break; + case OP_READLINK: + op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink); + break; + case OP_REMOVE: + op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove); + break; + case OP_RENAME: + op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename); + break; + case OP_RENEW: + op->status = nfsd4_renew(&op->u.renew); + break; + case OP_RESTOREFH: + op->status = nfsd4_restorefh(current_fh, save_fh); + break; + case OP_SAVEFH: + op->status = nfsd4_savefh(current_fh, save_fh); + break; + case OP_SETATTR: + op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr); + break; + case OP_SETCLIENTID: + op->status = nfsd4_setclientid(rqstp, &op->u.setclientid); + break; + case OP_SETCLIENTID_CONFIRM: + op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm); + break; + case OP_VERIFY: + op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify); + if (op->status == nfserr_same) + op->status = nfs_ok; + break; + case OP_WRITE: + op->status = nfsd4_write(rqstp, current_fh, &op->u.write); + break; + case OP_RELEASE_LOCKOWNER: + op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner); + break; + default: + BUG_ON(op->status == nfs_ok); + break; + } + +encode_op: + if (op->status == NFSERR_REPLAY_ME) { + op->replay = &replay_owner->so_replay; + nfsd4_encode_replay(resp, op); + status = op->status = op->replay->rp_status; + } else { + nfsd4_encode_operation(resp, op); + status = op->status; + } + if (replay_owner && (replay_owner != (void *)(-1))) { + nfs4_put_stateowner(replay_owner); + replay_owner = NULL; + } + } + +out: + nfsd4_release_compoundargs(args); + if (current_fh) + fh_put(current_fh); + kfree(current_fh); + if (save_fh) + fh_put(save_fh); + kfree(save_fh); + return status; +} + +#define nfs4svc_decode_voidargs NULL +#define nfs4svc_release_void NULL +#define nfsd4_voidres nfsd4_voidargs +#define nfs4svc_release_compound NULL +struct nfsd4_voidargs { int dummy; }; + +#define PROC(name, argt, rest, relt, cache, respsize) \ + { (svc_procfunc) nfsd4_proc_##name, \ + (kxdrproc_t) nfs4svc_decode_##argt##args, \ + (kxdrproc_t) nfs4svc_encode_##rest##res, \ + (kxdrproc_t) nfs4svc_release_##relt, \ + sizeof(struct nfsd4_##argt##args), \ + sizeof(struct nfsd4_##rest##res), \ + 0, \ + cache, \ + respsize, \ + } + +/* + * TODO: At the present time, the NFSv4 server does not do XID caching + * of requests. Implementing XID caching would not be a serious problem, + * although it would require a mild change in interfaces since one + * doesn't know whether an NFSv4 request is idempotent until after the + * XDR decode. However, XID caching totally confuses pynfs (Peter + * Astrand's regression testsuite for NFSv4 servers), which reuses + * XID's liberally, so I've left it unimplemented until pynfs generates + * better XID's. + */ +static struct svc_procedure nfsd_procedures4[2] = { + PROC(null, void, void, void, RC_NOCACHE, 1), + PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE) +}; + +struct svc_version nfsd_version4 = { + .vs_vers = 4, + .vs_nproc = 2, + .vs_proc = nfsd_procedures4, + .vs_dispatch = nfsd_dispatch, + .vs_xdrsize = NFS4_SVC_XDRSIZE, +}; + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |