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| author | J. Bruce Fields <bfields@redhat.com> | 2012-01-27 22:49:55 +0100 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2012-03-07 00:13:37 +0100 |
| commit | 59deeb9e5a2b535b95327c0d29bb3c2c4c3e8234 (patch) | |
| tree | df61459adb758aef2d1cf4da812ad0f750412bbd | |
| parent | nfsd4: delay setting current filehandle till success (diff) | |
| download | linux-59deeb9e5a2b535b95327c0d29bb3c2c4c3e8234.tar.xz linux-59deeb9e5a2b535b95327c0d29bb3c2c4c3e8234.zip | |
nfsd4: reduce do_open_lookup() stack usage
I get 320 bytes for struct svc_fh on x86_64, really a little large to be
putting on the stack; kmalloc() instead.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index bdb71a57c94e..abe808a52d97 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -193,10 +193,13 @@ static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) static __be32 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) { - struct svc_fh resfh; + struct svc_fh *resfh; __be32 status; - fh_init(&resfh, NFS4_FHSIZE); + resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); + if (!resfh) + return nfserr_jukebox; + fh_init(resfh, NFS4_FHSIZE); open->op_truncate = 0; if (open->op_create) { @@ -221,7 +224,7 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o */ 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); @@ -235,28 +238,29 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o FATTR4_WORD1_TIME_MODIFY); } else { status = nfsd_lookup(rqstp, current_fh, - open->op_fname.data, open->op_fname.len, &resfh); + open->op_fname.data, open->op_fname.len, resfh); fh_unlock(current_fh); 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); /* set reply cache */ fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, - &resfh.fh_handle); + &resfh->fh_handle); if (!open->op_created) - status = do_open_permission(rqstp, &resfh, open, + status = do_open_permission(rqstp, resfh, open, NFSD_MAY_NOP); set_change_info(&open->op_cinfo, current_fh); - fh_dup2(current_fh, &resfh); + fh_dup2(current_fh, resfh); out: - fh_put(&resfh); + fh_put(resfh); + kfree(resfh); return status; } |