326638b53f
without the directory timeout expiring, we get vattr_null as the attributes for that file. Ensure that we always report sane attributes by getting them from the server if this is the case. (also, sprinkle some const) Fixes problem reported by dyoung. But wait! The bug's medallion begins to glow! The bug looks much better! I crumble to dust. There's probably another similar bug related to "lazy open". It will trigger if we reclaim a node before the response to the open arrives. Even the comments (typoless) know about this bug ... But verifying it exists and fixing it will have to wait for another day.
249 lines
7.3 KiB
C
249 lines
7.3 KiB
C
/* $NetBSD: psshfs.h,v 1.40 2010/04/01 02:34:09 pooka Exp $ */
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/*
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* Copyright (c) 2006-2009 Antti Kantee. 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 ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* 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 OR
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* 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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#ifndef PSSHFS_H_
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#define PSSHFS_H_
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#include <sys/queue.h>
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#include <puffs.h>
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extern unsigned int max_reads;
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/*
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* Later protocol versions would have some advantages (such as link count
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* supported directly as a part of stat), but since proto version 3 seems
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* to be the only widely available version, let's not try to jump through
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* too many hoops to be compatible with all versions.
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*/
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#define SFTP_PROTOVERSION 3
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/* extensions, held in psshfs_ctx extensions */
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#define SFTP_EXT_POSIX_RENAME 0x01
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#define SFTP_EXT_STATVFS 0x02
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#define SFTP_EXT_FSTATVFS 0x04
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#define DEFAULTREFRESH 30
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#define REFRESHTIMEOUT(pctx, t) \
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(!(pctx)->refreshival || ((pctx->refreshival!=-1) && ((t)>pctx->refreshival)))
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PUFFSOP_PROTOS(psshfs);
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#define NEXTREQ(pctx) ((pctx->nextreq)++)
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#define PSSHFSAUTOVAR(pu) \
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struct puffs_cc *pcc = puffs_cc_getcc(pu); \
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struct psshfs_ctx *pctx = puffs_getspecific(pu); \
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uint32_t reqid = NEXTREQ(pctx); \
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struct puffs_framebuf *pb = psbuf_makeout(); \
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int rv = 0
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#define PSSHFSRETURN(rv) \
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puffs_framebuf_destroy(pb); \
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return (rv)
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#define GETRESPONSE(pb, fd) \
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do { \
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if (puffs_framev_enqueue_cc(pcc, fd, pb, 0) == -1) { \
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rv = errno; \
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goto out; \
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} \
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} while (/*CONSTCOND*/0)
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#define JUSTSEND(pb,fd) \
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do { \
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if (puffs_framev_enqueue_justsend(pu, fd, pb, 1, 0) == -1) { \
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rv = errno; \
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goto out; \
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} \
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} while (/*CONSTCOND*/0)
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#define SENDCB(pb, fd, f, a) \
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do { \
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if (puffs_framev_enqueue_cb(pu, fd, pb, f, a, 0) == -1) { \
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rv = errno; \
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goto out; \
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} \
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} while (/*CONSTCOND*/0)
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struct psshfs_dir {
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int valid;
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struct puffs_node *entry;
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char *entryname;
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struct vattr va;
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time_t attrread;
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};
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struct psshfs_fid {
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time_t mounttime;
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struct puffs_node *node;
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};
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struct psshfs_wait {
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struct puffs_cc *pw_cc;
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int pw_type;
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TAILQ_ENTRY(psshfs_wait) pw_entries;
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};
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#define PWTYPE_READDIR 1
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#define PWTYPE_READ1 2
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#define PWTYPE_READ2 3
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#define PWTYPE_WRITE 4
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struct psshfs_node {
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struct puffs_node *parent;
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struct psshfs_dir *dir; /* only valid if we're of type VDIR */
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size_t denttot;
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size_t dentnext;
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time_t dentread;
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int childcount;
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int stat;
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unsigned readcount;
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time_t attrread;
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char *symlink;
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time_t slread;
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char *fhand_r;
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char *fhand_w;
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uint32_t fhand_r_len;
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uint32_t fhand_w_len;
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struct puffs_framebuf *lazyopen_r;
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struct puffs_framebuf *lazyopen_w;
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int lazyopen_err_r, lazyopen_err_w;
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TAILQ_HEAD(, psshfs_wait) pw;
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};
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#define PSN_RECLAIMED 0x01
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#define PSN_HASFH 0x02
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#define PSN_READDIR 0x04
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#define PSN_DOLAZY_R 0x08
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#define PSN_DOLAZY_W 0x10
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#define PSN_LAZYWAIT_R 0x20
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#define PSN_LAZYWAIT_W 0x40
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#define PSN_HANDLECLOSE 0x80
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#define HANDLE_READ 0x1
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#define HANDLE_WRITE 0x2
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struct psshfs_ctx {
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int numconnections;
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int sshfd;
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int sshfd_data;
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pid_t sshpid;
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pid_t sshpid_data;
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const char *mountpath;
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char **sshargs;
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int protover;
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int extensions;
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uint32_t nextreq;
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struct puffs_framebuf *curpb;
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struct psshfs_node psn_root;
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ino_t nextino;
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int canexport;
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time_t mounttime;
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int refreshival;
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int domangleuid, domanglegid;
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uid_t mangleuid, myuid;
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gid_t manglegid, mygid;
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};
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#define PSSHFD_META 0
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#define PSSHFD_DATA 1
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int psshfs_handshake(struct puffs_usermount *, int);
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int psbuf_read(struct puffs_usermount *, struct puffs_framebuf *,int,int*);
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int psbuf_write(struct puffs_usermount *, struct puffs_framebuf *,int,int*);
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int psbuf_cmp(struct puffs_usermount *,
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struct puffs_framebuf *, struct puffs_framebuf *, int *);
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struct puffs_framebuf *psbuf_makeout(void);
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void psbuf_recycleout(struct puffs_framebuf *);
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void psbuf_put_1(struct puffs_framebuf *, uint8_t);
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void psbuf_put_2(struct puffs_framebuf *, uint16_t);
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void psbuf_put_4(struct puffs_framebuf *, uint32_t);
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void psbuf_put_8(struct puffs_framebuf *, uint64_t);
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void psbuf_put_str(struct puffs_framebuf *, const char *);
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void psbuf_put_data(struct puffs_framebuf *, const void *, uint32_t);
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void psbuf_put_vattr(struct puffs_framebuf *, const struct vattr *,
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const struct psshfs_ctx *);
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uint8_t psbuf_get_type(struct puffs_framebuf *);
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uint32_t psbuf_get_len(struct puffs_framebuf *);
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uint32_t psbuf_get_reqid(struct puffs_framebuf *);
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int psbuf_get_1(struct puffs_framebuf *, uint8_t *);
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int psbuf_get_2(struct puffs_framebuf *, uint16_t *);
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int psbuf_get_4(struct puffs_framebuf *, uint32_t *);
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int psbuf_get_8(struct puffs_framebuf *, uint64_t *);
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int psbuf_get_str(struct puffs_framebuf *, char **, uint32_t *);
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int psbuf_get_vattr(struct puffs_framebuf *, struct vattr *);
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int psbuf_expect_status(struct puffs_framebuf *);
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int psbuf_expect_handle(struct puffs_framebuf *, char **, uint32_t *);
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int psbuf_expect_name(struct puffs_framebuf *, uint32_t *);
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int psbuf_expect_attrs(struct puffs_framebuf *, struct vattr *);
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int psbuf_do_data(struct puffs_framebuf *, uint8_t *, uint32_t *);
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void psbuf_req_data(struct puffs_framebuf *, int, uint32_t,
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const void *, uint32_t);
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void psbuf_req_str(struct puffs_framebuf *, int, uint32_t, const char *);
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int sftp_readdir(struct puffs_usermount *, struct psshfs_ctx *,
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struct puffs_node *);
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struct psshfs_dir *lookup(struct psshfs_dir *, size_t, const char *);
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struct puffs_node *makenode(struct puffs_usermount *, struct puffs_node *,
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const struct psshfs_dir *, const struct vattr *);
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struct puffs_node *allocnode(struct puffs_usermount *, struct puffs_node *,
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const char *, const struct vattr *);
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struct psshfs_dir *direnter(struct puffs_node *, const char *);
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void nukenode(struct puffs_node *, const char *, int);
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void doreclaim(struct puffs_node *);
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int getpathattr(struct puffs_usermount *, const char *, struct vattr *);
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int getnodeattr(struct puffs_usermount *, struct puffs_node *, const char *);
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void closehandles(struct puffs_usermount *, struct psshfs_node *, int);
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void lazyopen_rresp(struct puffs_usermount *, struct puffs_framebuf *,
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void *, int);
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void lazyopen_wresp(struct puffs_usermount *, struct puffs_framebuf *,
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void *, int);
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#endif /* PSSHFS_H_ */
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