mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-17 18:11:00 +03:00
3f400b0f58
The FreeBSD project's coverity scans found dead code in `zfs_readdir()`. Also, the comment above `zfs_readdir()` is out of date. I fixed the comment and deleted all of the dead code, plus additional dead code that was found upon review. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #13924
256 lines
10 KiB
C
256 lines
10 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or https://opensource.org/licenses/CDDL-1.0.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright 2017 RackTop Systems.
|
|
*/
|
|
|
|
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
|
|
/* All Rights Reserved */
|
|
|
|
/*
|
|
* University Copyright- Copyright (c) 1982, 1986, 1988
|
|
* The Regents of the University of California
|
|
* All Rights Reserved
|
|
*
|
|
* University Acknowledgment- Portions of this document are derived from
|
|
* software developed by the University of California, Berkeley, and its
|
|
* contributors.
|
|
*/
|
|
|
|
#ifndef _SYS_VNODE_IMPL_H
|
|
#define _SYS_VNODE_IMPL_H
|
|
|
|
|
|
#define IS_DEVVP(vp) \
|
|
((vp)->v_type == VCHR || (vp)->v_type == VBLK || (vp)->v_type == VFIFO)
|
|
|
|
#define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */
|
|
|
|
/*
|
|
* The xvattr structure is really a variable length structure that
|
|
* is made up of:
|
|
* - The classic vattr_t (xva_vattr)
|
|
* - a 32 bit quantity (xva_mapsize) that specifies the size of the
|
|
* attribute bitmaps in 32 bit words.
|
|
* - A pointer to the returned attribute bitmap (needed because the
|
|
* previous element, the requested attribute bitmap) is variable length.
|
|
* - The requested attribute bitmap, which is an array of 32 bit words.
|
|
* Callers use the XVA_SET_REQ() macro to set the bits corresponding to
|
|
* the attributes that are being requested.
|
|
* - The returned attribute bitmap, which is an array of 32 bit words.
|
|
* File systems that support optional attributes use the XVA_SET_RTN()
|
|
* macro to set the bits corresponding to the attributes that are being
|
|
* returned.
|
|
* - The xoptattr_t structure which contains the attribute values
|
|
*
|
|
* xva_mapsize determines how many words in the attribute bitmaps.
|
|
* Immediately following the attribute bitmaps is the xoptattr_t.
|
|
* xva_getxoptattr() is used to get the pointer to the xoptattr_t
|
|
* section.
|
|
*/
|
|
|
|
#define XVA_MAPSIZE 3 /* Size of attr bitmaps */
|
|
#define XVA_MAGIC 0x78766174 /* Magic # for verification */
|
|
|
|
/*
|
|
* The xvattr structure is an extensible structure which permits optional
|
|
* attributes to be requested/returned. File systems may or may not support
|
|
* optional attributes. They do so at their own discretion but if they do
|
|
* support optional attributes, they must register the VFSFT_XVATTR feature
|
|
* so that the optional attributes can be set/retrieved.
|
|
*
|
|
* The fields of the xvattr structure are:
|
|
*
|
|
* xva_vattr - The first element of an xvattr is a legacy vattr structure
|
|
* which includes the common attributes. If AT_XVATTR is set in the va_mask
|
|
* then the entire structure is treated as an xvattr. If AT_XVATTR is not
|
|
* set, then only the xva_vattr structure can be used.
|
|
*
|
|
* xva_magic - 0x78766174 (hex for "xvat"). Magic number for verification.
|
|
*
|
|
* xva_mapsize - Size of requested and returned attribute bitmaps.
|
|
*
|
|
* xva_rtnattrmapp - Pointer to xva_rtnattrmap[]. We need this since the
|
|
* size of the array before it, xva_reqattrmap[], could change which means
|
|
* the location of xva_rtnattrmap[] could change. This will allow unbundled
|
|
* file systems to find the location of xva_rtnattrmap[] when the sizes change.
|
|
*
|
|
* xva_reqattrmap[] - Array of requested attributes. Attributes are
|
|
* represented by a specific bit in a specific element of the attribute
|
|
* map array. Callers set the bits corresponding to the attributes
|
|
* that the caller wants to get/set.
|
|
*
|
|
* xva_rtnattrmap[] - Array of attributes that the file system was able to
|
|
* process. Not all file systems support all optional attributes. This map
|
|
* informs the caller which attributes the underlying file system was able
|
|
* to set/get. (Same structure as the requested attributes array in terms
|
|
* of each attribute corresponding to specific bits and array elements.)
|
|
*
|
|
* xva_xoptattrs - Structure containing values of optional attributes.
|
|
* These values are only valid if the corresponding bits in xva_reqattrmap
|
|
* are set and the underlying file system supports those attributes.
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
* Attribute bits used in the extensible attribute's (xva's) attribute
|
|
* bitmaps. Note that the bitmaps are made up of a variable length number
|
|
* of 32-bit words. The convention is to use XAT{n}_{attrname} where "n"
|
|
* is the element in the bitmap (starting at 1). This convention is for
|
|
* the convenience of the maintainer to keep track of which element each
|
|
* attribute belongs to.
|
|
*
|
|
* NOTE THAT CONSUMERS MUST *NOT* USE THE XATn_* DEFINES DIRECTLY. CONSUMERS
|
|
* MUST USE THE XAT_* DEFINES.
|
|
*/
|
|
#define XAT0_INDEX 0LL /* Index into bitmap for XAT0 attrs */
|
|
#define XAT0_CREATETIME 0x00000001 /* Create time of file */
|
|
#define XAT0_ARCHIVE 0x00000002 /* Archive */
|
|
#define XAT0_SYSTEM 0x00000004 /* System */
|
|
#define XAT0_READONLY 0x00000008 /* Readonly */
|
|
#define XAT0_HIDDEN 0x00000010 /* Hidden */
|
|
#define XAT0_NOUNLINK 0x00000020 /* Nounlink */
|
|
#define XAT0_IMMUTABLE 0x00000040 /* immutable */
|
|
#define XAT0_APPENDONLY 0x00000080 /* appendonly */
|
|
#define XAT0_NODUMP 0x00000100 /* nodump */
|
|
#define XAT0_OPAQUE 0x00000200 /* opaque */
|
|
#define XAT0_AV_QUARANTINED 0x00000400 /* anti-virus quarantine */
|
|
#define XAT0_AV_MODIFIED 0x00000800 /* anti-virus modified */
|
|
#define XAT0_AV_SCANSTAMP 0x00001000 /* anti-virus scanstamp */
|
|
#define XAT0_REPARSE 0x00002000 /* FS reparse point */
|
|
#define XAT0_GEN 0x00004000 /* object generation number */
|
|
#define XAT0_OFFLINE 0x00008000 /* offline */
|
|
#define XAT0_SPARSE 0x00010000 /* sparse */
|
|
|
|
/* Support for XAT_* optional attributes */
|
|
#define XVA_MASK 0xffffffff /* Used to mask off 32 bits */
|
|
#define XVA_SHFT 32 /* Used to shift index */
|
|
|
|
/*
|
|
* Used to pry out the index and attribute bits from the XAT_* attributes
|
|
* defined below. Note that we're masking things down to 32 bits then
|
|
* casting to uint32_t.
|
|
*/
|
|
#define XVA_INDEX(attr) ((uint32_t)(((attr) >> XVA_SHFT) & XVA_MASK))
|
|
#define XVA_ATTRBIT(attr) ((uint32_t)((attr) & XVA_MASK))
|
|
|
|
/*
|
|
* The following defines present a "flat namespace" so that consumers don't
|
|
* need to keep track of which element belongs to which bitmap entry.
|
|
*
|
|
* NOTE THAT THESE MUST NEVER BE OR-ed TOGETHER
|
|
*/
|
|
#define XAT_CREATETIME ((XAT0_INDEX << XVA_SHFT) | XAT0_CREATETIME)
|
|
#define XAT_ARCHIVE ((XAT0_INDEX << XVA_SHFT) | XAT0_ARCHIVE)
|
|
#define XAT_SYSTEM ((XAT0_INDEX << XVA_SHFT) | XAT0_SYSTEM)
|
|
#define XAT_READONLY ((XAT0_INDEX << XVA_SHFT) | XAT0_READONLY)
|
|
#define XAT_HIDDEN ((XAT0_INDEX << XVA_SHFT) | XAT0_HIDDEN)
|
|
#define XAT_NOUNLINK ((XAT0_INDEX << XVA_SHFT) | XAT0_NOUNLINK)
|
|
#define XAT_IMMUTABLE ((XAT0_INDEX << XVA_SHFT) | XAT0_IMMUTABLE)
|
|
#define XAT_APPENDONLY ((XAT0_INDEX << XVA_SHFT) | XAT0_APPENDONLY)
|
|
#define XAT_NODUMP ((XAT0_INDEX << XVA_SHFT) | XAT0_NODUMP)
|
|
#define XAT_OPAQUE ((XAT0_INDEX << XVA_SHFT) | XAT0_OPAQUE)
|
|
#define XAT_AV_QUARANTINED ((XAT0_INDEX << XVA_SHFT) | XAT0_AV_QUARANTINED)
|
|
#define XAT_AV_MODIFIED ((XAT0_INDEX << XVA_SHFT) | XAT0_AV_MODIFIED)
|
|
#define XAT_AV_SCANSTAMP ((XAT0_INDEX << XVA_SHFT) | XAT0_AV_SCANSTAMP)
|
|
#define XAT_REPARSE ((XAT0_INDEX << XVA_SHFT) | XAT0_REPARSE)
|
|
#define XAT_GEN ((XAT0_INDEX << XVA_SHFT) | XAT0_GEN)
|
|
#define XAT_OFFLINE ((XAT0_INDEX << XVA_SHFT) | XAT0_OFFLINE)
|
|
#define XAT_SPARSE ((XAT0_INDEX << XVA_SHFT) | XAT0_SPARSE)
|
|
|
|
/*
|
|
* The returned attribute map array (xva_rtnattrmap[]) is located past the
|
|
* requested attribute map array (xva_reqattrmap[]). Its location changes
|
|
* when the array sizes change. We use a separate pointer in a known location
|
|
* (xva_rtnattrmapp) to hold the location of xva_rtnattrmap[]. This is
|
|
* set in xva_init()
|
|
*/
|
|
#define XVA_RTNATTRMAP(xvap) ((xvap)->xva_rtnattrmapp)
|
|
|
|
#define MODEMASK 07777 /* mode bits plus permission bits */
|
|
#define PERMMASK 00777 /* permission bits */
|
|
|
|
/*
|
|
* Flags for vnode operations.
|
|
*/
|
|
enum rm { RMFILE, RMDIRECTORY }; /* rm or rmdir (remove) */
|
|
enum create { CRCREAT, CRMKNOD, CRMKDIR }; /* reason for create */
|
|
|
|
/*
|
|
* Structure used by various vnode operations to determine
|
|
* the context (pid, host, identity) of a caller.
|
|
*
|
|
* The cc_caller_id is used to identify one or more callers who invoke
|
|
* operations, possibly on behalf of others. For example, the NFS
|
|
* server could have its own cc_caller_id which can be detected by
|
|
* vnode/vfs operations or (FEM) monitors on those operations. New
|
|
* caller IDs are generated by fs_new_caller_id().
|
|
*/
|
|
typedef struct caller_context {
|
|
pid_t cc_pid; /* Process ID of the caller */
|
|
int cc_sysid; /* System ID, used for remote calls */
|
|
u_longlong_t cc_caller_id; /* Identifier for (set of) caller(s) */
|
|
ulong_t cc_flags;
|
|
} caller_context_t;
|
|
|
|
struct taskq;
|
|
|
|
/*
|
|
* Flags for VOP_LOOKUP
|
|
*
|
|
* Defined in file.h, but also possible, FIGNORECASE and FSEARCH
|
|
*
|
|
*/
|
|
#define LOOKUP_DIR 0x01 /* want parent dir vp */
|
|
#define LOOKUP_XATTR 0x02 /* lookup up extended attr dir */
|
|
#define CREATE_XATTR_DIR 0x04 /* Create extended attr dir */
|
|
#define LOOKUP_HAVE_SYSATTR_DIR 0x08 /* Already created virtual GFS dir */
|
|
|
|
/*
|
|
* Public vnode manipulation functions.
|
|
*/
|
|
|
|
void vn_rele_async(struct vnode *vp, struct taskq *taskq);
|
|
|
|
#define VN_RELE_ASYNC(vp, taskq) { \
|
|
vn_rele_async(vp, taskq); \
|
|
}
|
|
|
|
/*
|
|
* Flags to VOP_SETATTR/VOP_GETATTR.
|
|
*/
|
|
#define ATTR_UTIME 0x01 /* non-default utime(2) request */
|
|
#define ATTR_EXEC 0x02 /* invocation from exec(2) */
|
|
#define ATTR_COMM 0x04 /* yield common vp attributes */
|
|
#define ATTR_HINT 0x08 /* information returned will be `hint' */
|
|
#define ATTR_REAL 0x10 /* yield attributes of the real vp */
|
|
#define ATTR_NOACLCHECK 0x20 /* Don't check ACL when checking permissions */
|
|
#define ATTR_TRIGGER 0x40 /* Mount first if vnode is a trigger mount */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_VNODE_H */
|