X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=fs%2Fnfsd%2Fnfs4proc.c;h=82189b208af31700418217e62d8339f13dce6565;hb=6b8a3ecf30ddb0cad83242e74ca7be9440d51549;hp=419572f33b72dafaf04a770fb53e29e250e5f42b;hpb=f42bcf1aa84a4c4348d53ac3013eff2b642987e5;p=~andy%2Flinux diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 419572f33b7..82189b208af 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -41,6 +41,7 @@ #include "vfs.h" #include "current_stateid.h" #include "netns.h" +#include "acl.h" #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #include @@ -230,17 +231,16 @@ static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate } static __be32 -do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) +do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) { struct svc_fh *current_fh = &cstate->current_fh; - struct svc_fh *resfh; int accmode; __be32 status; - resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); - if (!resfh) + *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); + if (!*resfh) return nfserr_jukebox; - fh_init(resfh, NFS4_FHSIZE); + fh_init(*resfh, NFS4_FHSIZE); open->op_truncate = 0; if (open->op_create) { @@ -265,12 +265,12 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru */ status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, open->op_fname.len, &open->op_iattr, - resfh, open->op_createmode, + *resfh, open->op_createmode, (u32 *)open->op_verf.data, &open->op_truncate, &open->op_created); if (!status && open->op_label.len) - nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval); + nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); /* * Following rfc 3530 14.2.16, use the returned bitmask @@ -280,31 +280,32 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_MODIFY); - } else { + } else + /* + * Note this may exit with the parent still locked. + * We will hold the lock until nfsd4_open's final + * lookup, to prevent renames or unlinks until we've had + * a chance to an acquire a delegation if appropriate. + */ status = nfsd_lookup(rqstp, current_fh, - open->op_fname.data, open->op_fname.len, resfh); - fh_unlock(current_fh); - } + open->op_fname.data, open->op_fname.len, *resfh); if (status) goto out; - status = nfsd_check_obj_isreg(resfh); + status = nfsd_check_obj_isreg(*resfh); if (status) goto out; if (is_create_with_attrs(open) && open->op_acl != NULL) - do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval); + do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); - nfsd4_set_open_owner_reply_cache(cstate, open, resfh); + nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); accmode = NFSD_MAY_NOP; if (open->op_created || open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) accmode |= NFSD_MAY_OWNER_OVERRIDE; - status = do_open_permission(rqstp, resfh, open, accmode); + status = do_open_permission(rqstp, *resfh, open, accmode); set_change_info(&open->op_cinfo, current_fh); - fh_dup2(current_fh, resfh); out: - fh_put(resfh); - kfree(resfh); return status; } @@ -357,6 +358,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) { __be32 status; + struct svc_fh *resfh = NULL; struct nfsd4_compoundres *resp; struct net *net = SVC_NET(rqstp); struct nfsd_net *nn = net_generic(net, nfsd_net_id); @@ -423,7 +425,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, switch (open->op_claim_type) { case NFS4_OPEN_CLAIM_DELEGATE_CUR: case NFS4_OPEN_CLAIM_NULL: - status = do_open_lookup(rqstp, cstate, open); + status = do_open_lookup(rqstp, cstate, open, &resfh); if (status) goto out; break; @@ -439,6 +441,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = do_open_fhandle(rqstp, cstate, open); if (status) goto out; + resfh = &cstate->current_fh; break; case NFS4_OPEN_CLAIM_DELEG_PREV_FH: case NFS4_OPEN_CLAIM_DELEGATE_PREV: @@ -458,9 +461,14 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, * 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, &cstate->current_fh, open); + status = nfsd4_process_open2(rqstp, resfh, open); WARN_ON(status && open->op_created); out: + if (resfh && resfh != &cstate->current_fh) { + fh_dup2(&cstate->current_fh, resfh); + fh_put(resfh); + kfree(resfh); + } nfsd4_cleanup_open_state(open, status); if (open->op_openowner && !nfsd4_has_session(cstate)) cstate->replay_owner = &open->op_openowner->oo_owner; @@ -1069,8 +1077,10 @@ _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, cstate->current_fh.fh_dentry, &p, count, verify->ve_bmval, rqstp, 0); - - /* this means that nfsd4_encode_fattr() ran out of space */ + /* + * If nfsd4_encode_fattr() ran out of space, assume that's because + * the attributes are longer (hence different) than those given: + */ if (status == nfserr_resource) status = nfserr_not_same; if (status) @@ -1524,7 +1534,8 @@ static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ - 1 + 1 + 2 + /* eir_flags, spr_how, spo_must_enforce & _allow */\ + 1 + 1 + /* eir_flags, spr_how */\ + 4 + /* spo_must_enforce & _allow with bitmap */\ 2 + /*eir_server_owner.so_minor_id */\ /* eir_server_owner.so_major_id<> */\ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ @@ -1881,6 +1892,7 @@ struct svc_version nfsd_version4 = { .vs_proc = nfsd_procedures4, .vs_dispatch = nfsd_dispatch, .vs_xdrsize = NFS4_SVC_XDRSIZE, + .vs_rpcb_optnl = 1, }; /*