a9285ae5c4
Isilon has the concept of an in-memory exit-code ring that saves the last exit code of a function and allows for stack tracing. This is very helpful when debugging tough issues. This patch is essentially a no-op for BSD at this point, until we upstream the dexitcode logic itself. The patch adds DEXITCODE calls to every NFS function that returns an errno error code. A number of code paths were also reorganized to have single exit paths, to reduce code duplication. Submitted by: David Kwan <dkwan@isilon.com> Reviewed by: rmacklem Approved by: zml (mentor) MFC after: 2 weeks
120 lines
4.9 KiB
C
120 lines
4.9 KiB
C
/*-
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* Copyright (c) 2009 Rick Macklem, University of Guelph
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* These macros handle nfsvattr fields. They look a bit silly here, but
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* are quite different for the Darwin port.
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*/
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#define NFSVNO_ATTRINIT(n) (VATTR_NULL(&((n)->na_vattr)))
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#define NFSVNO_SETATTRVAL(n, f, v) ((n)->na_##f = (v))
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#define NFSVNO_SETACTIVE(n, f)
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#define NFSVNO_UNSET(n, f) ((n)->na_##f = VNOVAL)
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#define NFSVNO_NOTSETMODE(n) ((n)->na_mode == ((mode_t)VNOVAL))
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#define NFSVNO_ISSETMODE(n) ((n)->na_mode != ((mode_t)VNOVAL))
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#define NFSVNO_NOTSETUID(n) ((n)->na_uid == ((uid_t)VNOVAL))
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#define NFSVNO_ISSETUID(n) ((n)->na_uid != ((uid_t)VNOVAL))
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#define NFSVNO_NOTSETGID(n) ((n)->na_gid == ((gid_t)VNOVAL))
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#define NFSVNO_ISSETGID(n) ((n)->na_gid != ((gid_t)VNOVAL))
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#define NFSVNO_NOTSETSIZE(n) ((n)->na_size == VNOVAL)
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#define NFSVNO_ISSETSIZE(n) ((n)->na_size != VNOVAL)
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#define NFSVNO_NOTSETATIME(n) ((n)->na_atime.tv_sec == VNOVAL)
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#define NFSVNO_ISSETATIME(n) ((n)->na_atime.tv_sec != VNOVAL)
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#define NFSVNO_NOTSETMTIME(n) ((n)->na_mtime.tv_sec == VNOVAL)
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#define NFSVNO_ISSETMTIME(n) ((n)->na_mtime.tv_sec != VNOVAL)
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/*
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* This structure acts as a "catch-all" for information that
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* needs to be returned by nfsd_fhtovp().
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*/
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struct nfsexstuff {
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int nes_exflag; /* export flags */
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int nes_numsecflavor; /* # of security flavors */
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int nes_secflavors[MAXSECFLAVORS]; /* and the flavors */
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};
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/*
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* These are NO-OPS for BSD until Isilon upstreams EXITCODE support.
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* EXITCODE is an in-memory ring buffer that holds the routines failing status.
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* This is a valuable tool to use when debugging and analyzing issues.
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* In addition to recording a routine's failing status, it offers
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* logging of routines for call stack tracing.
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* EXITCODE should be used only in routines that return a true errno value, as
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* that value will be formatted to a displayable errno string. Routines that
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* return regular int status that are not true errno should not set EXITCODE.
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* If you want to log routine tracing, you can add EXITCODE(0) to any routine.
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* NFS extended the EXITCODE with EXITCODE2 to record either the routine's
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* exit errno status or the nd_repstat.
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*/
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#define NFSEXITCODE(error)
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#define NFSEXITCODE2(error, nd)
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#define NFSVNO_EXINIT(e) ((e)->nes_exflag = 0)
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#define NFSVNO_EXPORTED(e) ((e)->nes_exflag & MNT_EXPORTED)
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#define NFSVNO_EXRDONLY(e) ((e)->nes_exflag & MNT_EXRDONLY)
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#define NFSVNO_EXPORTANON(e) ((e)->nes_exflag & MNT_EXPORTANON)
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#define NFSVNO_EXSTRICTACCESS(e) ((e)->nes_exflag & MNT_EXSTRICTACCESS)
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#define NFSVNO_EXV4ONLY(e) ((e)->nes_exflag & MNT_EXV4ONLY)
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#define NFSVNO_SETEXRDONLY(e) ((e)->nes_exflag = (MNT_EXPORTED|MNT_EXRDONLY))
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#define NFSVNO_CMPFH(f1, f2) \
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((f1)->fh_fsid.val[0] == (f2)->fh_fsid.val[0] && \
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(f1)->fh_fsid.val[1] == (f2)->fh_fsid.val[1] && \
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bcmp(&(f1)->fh_fid, &(f2)->fh_fid, sizeof(struct fid)) == 0)
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#define NFSLOCKHASH(f) \
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(&nfslockhash[nfsrv_hashfh(f) % NFSLOCKHASHSIZE])
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#define NFSFPVNODE(f) ((struct vnode *)((f)->f_data))
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#define NFSFPCRED(f) ((f)->f_cred)
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#define NFSFPFLAG(f) ((f)->f_flag)
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int fp_getfvp(NFSPROC_T *, int, struct file **, struct vnode **);
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#define NFSNAMEICNDSET(n, c, o, f) do { \
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(n)->cn_cred = (c); \
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(n)->cn_nameiop = (o); \
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(n)->cn_flags = (f); \
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} while (0)
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/*
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* A little bit of Darwin vfs kpi.
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*/
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#define vnode_mount(v) ((v)->v_mount)
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#define vfs_statfs(m) (&((m)->mnt_stat))
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#define NFSPATHLEN_T size_t
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/*
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* These are set to the minimum and maximum size of a server file
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* handle.
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*/
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#define NFSRV_MINFH (sizeof (fhandle_t))
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#define NFSRV_MAXFH (sizeof (fhandle_t))
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