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792 lines
18 KiB
792 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* 9P Protocol Support Code |
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* |
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* Copyright (C) 2008 by Eric Van Hensbergen <[email protected]> |
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* |
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* Base on code from Anthony Liguori <[email protected]> |
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* Copyright (C) 2008 by IBM, Corp. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/uaccess.h> |
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#include <linux/slab.h> |
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#include <linux/sched.h> |
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#include <linux/stddef.h> |
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#include <linux/types.h> |
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#include <linux/uio.h> |
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#include <net/9p/9p.h> |
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#include <net/9p/client.h> |
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#include "protocol.h" |
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#include <trace/events/9p.h> |
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/* len[2] text[len] */ |
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#define P9_STRLEN(s) \ |
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(2 + min_t(size_t, s ? strlen(s) : 0, USHRT_MAX)) |
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|
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/** |
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* p9_msg_buf_size - Returns a buffer size sufficiently large to hold the |
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* intended 9p message. |
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* @c: client |
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* @type: message type |
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* @fmt: format template for assembling request message |
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* (see p9pdu_vwritef) |
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* @ap: variable arguments to be fed to passed format template |
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* (see p9pdu_vwritef) |
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* |
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* Note: Even for response types (P9_R*) the format template and variable |
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* arguments must always be for the originating request type (P9_T*). |
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*/ |
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size_t p9_msg_buf_size(struct p9_client *c, enum p9_msg_t type, |
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const char *fmt, va_list ap) |
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{ |
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/* size[4] type[1] tag[2] */ |
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const int hdr = 4 + 1 + 2; |
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/* ename[s] errno[4] */ |
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const int rerror_size = hdr + P9_ERRMAX + 4; |
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/* ecode[4] */ |
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const int rlerror_size = hdr + 4; |
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const int err_size = |
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c->proto_version == p9_proto_2000L ? rlerror_size : rerror_size; |
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static_assert(NAME_MAX <= 4*1024, "p9_msg_buf_size() currently assumes " |
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"a max. allowed directory entry name length of 4k"); |
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switch (type) { |
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|
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/* message types not used at all */ |
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case P9_TERROR: |
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case P9_TLERROR: |
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case P9_TAUTH: |
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case P9_RAUTH: |
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BUG(); |
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|
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/* variable length & potentially large message types */ |
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case P9_TATTACH: |
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BUG_ON(strcmp("ddss?u", fmt)); |
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va_arg(ap, int32_t); |
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va_arg(ap, int32_t); |
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{ |
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const char *uname = va_arg(ap, const char *); |
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const char *aname = va_arg(ap, const char *); |
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/* fid[4] afid[4] uname[s] aname[s] n_uname[4] */ |
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return hdr + 4 + 4 + P9_STRLEN(uname) + P9_STRLEN(aname) + 4; |
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} |
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case P9_TWALK: |
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BUG_ON(strcmp("ddT", fmt)); |
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va_arg(ap, int32_t); |
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va_arg(ap, int32_t); |
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{ |
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uint i, nwname = va_arg(ap, int); |
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size_t wname_all; |
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const char **wnames = va_arg(ap, const char **); |
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for (i = 0, wname_all = 0; i < nwname; ++i) { |
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wname_all += P9_STRLEN(wnames[i]); |
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} |
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/* fid[4] newfid[4] nwname[2] nwname*(wname[s]) */ |
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return hdr + 4 + 4 + 2 + wname_all; |
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} |
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case P9_RWALK: |
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BUG_ON(strcmp("ddT", fmt)); |
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va_arg(ap, int32_t); |
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va_arg(ap, int32_t); |
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{ |
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uint nwname = va_arg(ap, int); |
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/* nwqid[2] nwqid*(wqid[13]) */ |
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return max_t(size_t, hdr + 2 + nwname * 13, err_size); |
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} |
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case P9_TCREATE: |
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BUG_ON(strcmp("dsdb?s", fmt)); |
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va_arg(ap, int32_t); |
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{ |
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const char *name = va_arg(ap, const char *); |
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if (c->proto_version == p9_proto_legacy) { |
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/* fid[4] name[s] perm[4] mode[1] */ |
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return hdr + 4 + P9_STRLEN(name) + 4 + 1; |
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} else { |
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va_arg(ap, int32_t); |
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va_arg(ap, int); |
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{ |
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const char *ext = va_arg(ap, const char *); |
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/* fid[4] name[s] perm[4] mode[1] extension[s] */ |
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return hdr + 4 + P9_STRLEN(name) + 4 + 1 + P9_STRLEN(ext); |
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} |
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} |
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} |
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case P9_TLCREATE: |
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BUG_ON(strcmp("dsddg", fmt)); |
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va_arg(ap, int32_t); |
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{ |
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const char *name = va_arg(ap, const char *); |
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/* fid[4] name[s] flags[4] mode[4] gid[4] */ |
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return hdr + 4 + P9_STRLEN(name) + 4 + 4 + 4; |
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} |
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case P9_RREAD: |
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case P9_RREADDIR: |
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BUG_ON(strcmp("dqd", fmt)); |
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va_arg(ap, int32_t); |
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va_arg(ap, int64_t); |
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{ |
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const int32_t count = va_arg(ap, int32_t); |
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/* count[4] data[count] */ |
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return max_t(size_t, hdr + 4 + count, err_size); |
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} |
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case P9_TWRITE: |
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BUG_ON(strcmp("dqV", fmt)); |
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va_arg(ap, int32_t); |
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va_arg(ap, int64_t); |
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{ |
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const int32_t count = va_arg(ap, int32_t); |
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/* fid[4] offset[8] count[4] data[count] */ |
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return hdr + 4 + 8 + 4 + count; |
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} |
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case P9_TRENAMEAT: |
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BUG_ON(strcmp("dsds", fmt)); |
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va_arg(ap, int32_t); |
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{ |
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const char *oldname, *newname; |
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oldname = va_arg(ap, const char *); |
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va_arg(ap, int32_t); |
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newname = va_arg(ap, const char *); |
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/* olddirfid[4] oldname[s] newdirfid[4] newname[s] */ |
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return hdr + 4 + P9_STRLEN(oldname) + 4 + P9_STRLEN(newname); |
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} |
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case P9_TSYMLINK: |
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BUG_ON(strcmp("dssg", fmt)); |
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va_arg(ap, int32_t); |
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{ |
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const char *name = va_arg(ap, const char *); |
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const char *symtgt = va_arg(ap, const char *); |
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/* fid[4] name[s] symtgt[s] gid[4] */ |
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return hdr + 4 + P9_STRLEN(name) + P9_STRLEN(symtgt) + 4; |
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} |
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case P9_RERROR: |
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return rerror_size; |
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case P9_RLERROR: |
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return rlerror_size; |
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/* small message types */ |
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case P9_TWSTAT: |
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case P9_RSTAT: |
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case P9_RREADLINK: |
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case P9_TXATTRWALK: |
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case P9_TXATTRCREATE: |
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case P9_TLINK: |
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case P9_TMKDIR: |
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case P9_TMKNOD: |
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case P9_TRENAME: |
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case P9_TUNLINKAT: |
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case P9_TLOCK: |
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return 8 * 1024; |
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/* tiny message types */ |
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default: |
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return 4 * 1024; |
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} |
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} |
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static int |
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p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...); |
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void p9stat_free(struct p9_wstat *stbuf) |
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{ |
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kfree(stbuf->name); |
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stbuf->name = NULL; |
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kfree(stbuf->uid); |
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stbuf->uid = NULL; |
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kfree(stbuf->gid); |
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stbuf->gid = NULL; |
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kfree(stbuf->muid); |
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stbuf->muid = NULL; |
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kfree(stbuf->extension); |
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stbuf->extension = NULL; |
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} |
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EXPORT_SYMBOL(p9stat_free); |
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size_t pdu_read(struct p9_fcall *pdu, void *data, size_t size) |
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{ |
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size_t len = min(pdu->size - pdu->offset, size); |
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memcpy(data, &pdu->sdata[pdu->offset], len); |
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pdu->offset += len; |
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return size - len; |
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} |
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static size_t pdu_write(struct p9_fcall *pdu, const void *data, size_t size) |
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{ |
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size_t len = min(pdu->capacity - pdu->size, size); |
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memcpy(&pdu->sdata[pdu->size], data, len); |
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pdu->size += len; |
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return size - len; |
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} |
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static size_t |
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pdu_write_u(struct p9_fcall *pdu, struct iov_iter *from, size_t size) |
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{ |
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size_t len = min(pdu->capacity - pdu->size, size); |
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if (!copy_from_iter_full(&pdu->sdata[pdu->size], len, from)) |
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len = 0; |
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pdu->size += len; |
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return size - len; |
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} |
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/* b - int8_t |
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* w - int16_t |
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* d - int32_t |
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* q - int64_t |
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* s - string |
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* u - numeric uid |
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* g - numeric gid |
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* S - stat |
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* Q - qid |
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* D - data blob (int32_t size followed by void *, results are not freed) |
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* T - array of strings (int16_t count, followed by strings) |
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* R - array of qids (int16_t count, followed by qids) |
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* A - stat for 9p2000.L (p9_stat_dotl) |
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* ? - if optional = 1, continue parsing |
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*/ |
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static int |
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p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt, |
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va_list ap) |
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{ |
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const char *ptr; |
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int errcode = 0; |
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for (ptr = fmt; *ptr; ptr++) { |
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switch (*ptr) { |
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case 'b':{ |
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int8_t *val = va_arg(ap, int8_t *); |
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if (pdu_read(pdu, val, sizeof(*val))) { |
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errcode = -EFAULT; |
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break; |
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} |
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} |
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break; |
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case 'w':{ |
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int16_t *val = va_arg(ap, int16_t *); |
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__le16 le_val; |
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if (pdu_read(pdu, &le_val, sizeof(le_val))) { |
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errcode = -EFAULT; |
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break; |
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} |
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*val = le16_to_cpu(le_val); |
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} |
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break; |
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case 'd':{ |
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int32_t *val = va_arg(ap, int32_t *); |
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__le32 le_val; |
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if (pdu_read(pdu, &le_val, sizeof(le_val))) { |
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errcode = -EFAULT; |
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break; |
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} |
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*val = le32_to_cpu(le_val); |
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} |
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break; |
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case 'q':{ |
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int64_t *val = va_arg(ap, int64_t *); |
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__le64 le_val; |
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if (pdu_read(pdu, &le_val, sizeof(le_val))) { |
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errcode = -EFAULT; |
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break; |
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} |
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*val = le64_to_cpu(le_val); |
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} |
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break; |
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case 's':{ |
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char **sptr = va_arg(ap, char **); |
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uint16_t len; |
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errcode = p9pdu_readf(pdu, proto_version, |
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"w", &len); |
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if (errcode) |
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break; |
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*sptr = kmalloc(len + 1, GFP_NOFS); |
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if (*sptr == NULL) { |
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errcode = -ENOMEM; |
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break; |
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} |
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if (pdu_read(pdu, *sptr, len)) { |
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errcode = -EFAULT; |
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kfree(*sptr); |
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*sptr = NULL; |
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} else |
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(*sptr)[len] = 0; |
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} |
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break; |
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case 'u': { |
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kuid_t *uid = va_arg(ap, kuid_t *); |
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__le32 le_val; |
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if (pdu_read(pdu, &le_val, sizeof(le_val))) { |
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errcode = -EFAULT; |
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break; |
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} |
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*uid = make_kuid(&init_user_ns, |
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le32_to_cpu(le_val)); |
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} break; |
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case 'g': { |
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kgid_t *gid = va_arg(ap, kgid_t *); |
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__le32 le_val; |
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if (pdu_read(pdu, &le_val, sizeof(le_val))) { |
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errcode = -EFAULT; |
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break; |
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} |
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*gid = make_kgid(&init_user_ns, |
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le32_to_cpu(le_val)); |
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} break; |
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case 'Q':{ |
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struct p9_qid *qid = |
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va_arg(ap, struct p9_qid *); |
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errcode = p9pdu_readf(pdu, proto_version, "bdq", |
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&qid->type, &qid->version, |
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&qid->path); |
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} |
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break; |
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case 'S':{ |
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struct p9_wstat *stbuf = |
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va_arg(ap, struct p9_wstat *); |
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memset(stbuf, 0, sizeof(struct p9_wstat)); |
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stbuf->n_uid = stbuf->n_muid = INVALID_UID; |
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stbuf->n_gid = INVALID_GID; |
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errcode = |
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p9pdu_readf(pdu, proto_version, |
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"wwdQdddqssss?sugu", |
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&stbuf->size, &stbuf->type, |
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&stbuf->dev, &stbuf->qid, |
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&stbuf->mode, &stbuf->atime, |
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&stbuf->mtime, &stbuf->length, |
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&stbuf->name, &stbuf->uid, |
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&stbuf->gid, &stbuf->muid, |
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&stbuf->extension, |
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&stbuf->n_uid, &stbuf->n_gid, |
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&stbuf->n_muid); |
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if (errcode) |
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p9stat_free(stbuf); |
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} |
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break; |
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case 'D':{ |
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uint32_t *count = va_arg(ap, uint32_t *); |
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void **data = va_arg(ap, void **); |
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errcode = |
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p9pdu_readf(pdu, proto_version, "d", count); |
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if (!errcode) { |
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*count = |
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min_t(uint32_t, *count, |
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pdu->size - pdu->offset); |
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*data = &pdu->sdata[pdu->offset]; |
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} |
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} |
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break; |
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case 'T':{ |
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uint16_t *nwname = va_arg(ap, uint16_t *); |
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char ***wnames = va_arg(ap, char ***); |
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errcode = p9pdu_readf(pdu, proto_version, |
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"w", nwname); |
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if (!errcode) { |
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*wnames = |
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kmalloc_array(*nwname, |
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sizeof(char *), |
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GFP_NOFS); |
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if (!*wnames) |
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errcode = -ENOMEM; |
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} |
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if (!errcode) { |
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int i; |
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for (i = 0; i < *nwname; i++) { |
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errcode = |
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p9pdu_readf(pdu, |
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proto_version, |
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"s", |
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&(*wnames)[i]); |
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if (errcode) |
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break; |
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} |
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} |
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if (errcode) { |
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if (*wnames) { |
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int i; |
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for (i = 0; i < *nwname; i++) |
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kfree((*wnames)[i]); |
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} |
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kfree(*wnames); |
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*wnames = NULL; |
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} |
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} |
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break; |
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case 'R':{ |
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uint16_t *nwqid = va_arg(ap, uint16_t *); |
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struct p9_qid **wqids = |
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va_arg(ap, struct p9_qid **); |
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*wqids = NULL; |
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errcode = |
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p9pdu_readf(pdu, proto_version, "w", nwqid); |
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if (!errcode) { |
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*wqids = |
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kmalloc_array(*nwqid, |
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sizeof(struct p9_qid), |
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GFP_NOFS); |
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if (*wqids == NULL) |
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errcode = -ENOMEM; |
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} |
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if (!errcode) { |
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int i; |
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|
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for (i = 0; i < *nwqid; i++) { |
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errcode = |
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p9pdu_readf(pdu, |
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proto_version, |
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"Q", |
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&(*wqids)[i]); |
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if (errcode) |
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break; |
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} |
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} |
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|
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if (errcode) { |
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kfree(*wqids); |
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*wqids = NULL; |
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} |
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} |
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break; |
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case 'A': { |
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struct p9_stat_dotl *stbuf = |
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va_arg(ap, struct p9_stat_dotl *); |
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|
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memset(stbuf, 0, sizeof(struct p9_stat_dotl)); |
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errcode = |
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p9pdu_readf(pdu, proto_version, |
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"qQdugqqqqqqqqqqqqqqq", |
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&stbuf->st_result_mask, |
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&stbuf->qid, |
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&stbuf->st_mode, |
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&stbuf->st_uid, &stbuf->st_gid, |
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&stbuf->st_nlink, |
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&stbuf->st_rdev, &stbuf->st_size, |
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&stbuf->st_blksize, &stbuf->st_blocks, |
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&stbuf->st_atime_sec, |
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&stbuf->st_atime_nsec, |
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&stbuf->st_mtime_sec, |
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&stbuf->st_mtime_nsec, |
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&stbuf->st_ctime_sec, |
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&stbuf->st_ctime_nsec, |
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&stbuf->st_btime_sec, |
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&stbuf->st_btime_nsec, |
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&stbuf->st_gen, |
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&stbuf->st_data_version); |
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} |
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break; |
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case '?': |
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if ((proto_version != p9_proto_2000u) && |
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(proto_version != p9_proto_2000L)) |
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return 0; |
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break; |
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default: |
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BUG(); |
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break; |
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} |
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|
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if (errcode) |
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break; |
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} |
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|
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return errcode; |
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} |
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|
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int |
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p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, |
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va_list ap) |
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{ |
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const char *ptr; |
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int errcode = 0; |
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|
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for (ptr = fmt; *ptr; ptr++) { |
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switch (*ptr) { |
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case 'b':{ |
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int8_t val = va_arg(ap, int); |
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if (pdu_write(pdu, &val, sizeof(val))) |
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errcode = -EFAULT; |
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} |
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break; |
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case 'w':{ |
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__le16 val = cpu_to_le16(va_arg(ap, int)); |
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if (pdu_write(pdu, &val, sizeof(val))) |
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errcode = -EFAULT; |
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} |
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break; |
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case 'd':{ |
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__le32 val = cpu_to_le32(va_arg(ap, int32_t)); |
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if (pdu_write(pdu, &val, sizeof(val))) |
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errcode = -EFAULT; |
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} |
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break; |
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case 'q':{ |
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__le64 val = cpu_to_le64(va_arg(ap, int64_t)); |
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if (pdu_write(pdu, &val, sizeof(val))) |
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errcode = -EFAULT; |
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} |
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break; |
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case 's':{ |
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const char *sptr = va_arg(ap, const char *); |
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uint16_t len = 0; |
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if (sptr) |
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len = min_t(size_t, strlen(sptr), |
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USHRT_MAX); |
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|
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errcode = p9pdu_writef(pdu, proto_version, |
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"w", len); |
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if (!errcode && pdu_write(pdu, sptr, len)) |
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errcode = -EFAULT; |
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} |
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break; |
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case 'u': { |
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kuid_t uid = va_arg(ap, kuid_t); |
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__le32 val = cpu_to_le32( |
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from_kuid(&init_user_ns, uid)); |
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if (pdu_write(pdu, &val, sizeof(val))) |
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errcode = -EFAULT; |
|
} break; |
|
case 'g': { |
|
kgid_t gid = va_arg(ap, kgid_t); |
|
__le32 val = cpu_to_le32( |
|
from_kgid(&init_user_ns, gid)); |
|
if (pdu_write(pdu, &val, sizeof(val))) |
|
errcode = -EFAULT; |
|
} break; |
|
case 'Q':{ |
|
const struct p9_qid *qid = |
|
va_arg(ap, const struct p9_qid *); |
|
errcode = |
|
p9pdu_writef(pdu, proto_version, "bdq", |
|
qid->type, qid->version, |
|
qid->path); |
|
} break; |
|
case 'S':{ |
|
const struct p9_wstat *stbuf = |
|
va_arg(ap, const struct p9_wstat *); |
|
errcode = |
|
p9pdu_writef(pdu, proto_version, |
|
"wwdQdddqssss?sugu", |
|
stbuf->size, stbuf->type, |
|
stbuf->dev, &stbuf->qid, |
|
stbuf->mode, stbuf->atime, |
|
stbuf->mtime, stbuf->length, |
|
stbuf->name, stbuf->uid, |
|
stbuf->gid, stbuf->muid, |
|
stbuf->extension, stbuf->n_uid, |
|
stbuf->n_gid, stbuf->n_muid); |
|
} break; |
|
case 'V':{ |
|
uint32_t count = va_arg(ap, uint32_t); |
|
struct iov_iter *from = |
|
va_arg(ap, struct iov_iter *); |
|
errcode = p9pdu_writef(pdu, proto_version, "d", |
|
count); |
|
if (!errcode && pdu_write_u(pdu, from, count)) |
|
errcode = -EFAULT; |
|
} |
|
break; |
|
case 'T':{ |
|
uint16_t nwname = va_arg(ap, int); |
|
const char **wnames = va_arg(ap, const char **); |
|
|
|
errcode = p9pdu_writef(pdu, proto_version, "w", |
|
nwname); |
|
if (!errcode) { |
|
int i; |
|
|
|
for (i = 0; i < nwname; i++) { |
|
errcode = |
|
p9pdu_writef(pdu, |
|
proto_version, |
|
"s", |
|
wnames[i]); |
|
if (errcode) |
|
break; |
|
} |
|
} |
|
} |
|
break; |
|
case 'R':{ |
|
uint16_t nwqid = va_arg(ap, int); |
|
struct p9_qid *wqids = |
|
va_arg(ap, struct p9_qid *); |
|
|
|
errcode = p9pdu_writef(pdu, proto_version, "w", |
|
nwqid); |
|
if (!errcode) { |
|
int i; |
|
|
|
for (i = 0; i < nwqid; i++) { |
|
errcode = |
|
p9pdu_writef(pdu, |
|
proto_version, |
|
"Q", |
|
&wqids[i]); |
|
if (errcode) |
|
break; |
|
} |
|
} |
|
} |
|
break; |
|
case 'I':{ |
|
struct p9_iattr_dotl *p9attr = va_arg(ap, |
|
struct p9_iattr_dotl *); |
|
|
|
errcode = p9pdu_writef(pdu, proto_version, |
|
"ddugqqqqq", |
|
p9attr->valid, |
|
p9attr->mode, |
|
p9attr->uid, |
|
p9attr->gid, |
|
p9attr->size, |
|
p9attr->atime_sec, |
|
p9attr->atime_nsec, |
|
p9attr->mtime_sec, |
|
p9attr->mtime_nsec); |
|
} |
|
break; |
|
case '?': |
|
if ((proto_version != p9_proto_2000u) && |
|
(proto_version != p9_proto_2000L)) |
|
return 0; |
|
break; |
|
default: |
|
BUG(); |
|
break; |
|
} |
|
|
|
if (errcode) |
|
break; |
|
} |
|
|
|
return errcode; |
|
} |
|
|
|
int p9pdu_readf(struct p9_fcall *pdu, int proto_version, const char *fmt, ...) |
|
{ |
|
va_list ap; |
|
int ret; |
|
|
|
va_start(ap, fmt); |
|
ret = p9pdu_vreadf(pdu, proto_version, fmt, ap); |
|
va_end(ap); |
|
|
|
return ret; |
|
} |
|
|
|
static int |
|
p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...) |
|
{ |
|
va_list ap; |
|
int ret; |
|
|
|
va_start(ap, fmt); |
|
ret = p9pdu_vwritef(pdu, proto_version, fmt, ap); |
|
va_end(ap); |
|
|
|
return ret; |
|
} |
|
|
|
int p9stat_read(struct p9_client *clnt, char *buf, int len, struct p9_wstat *st) |
|
{ |
|
struct p9_fcall fake_pdu; |
|
int ret; |
|
|
|
fake_pdu.size = len; |
|
fake_pdu.capacity = len; |
|
fake_pdu.sdata = buf; |
|
fake_pdu.offset = 0; |
|
|
|
ret = p9pdu_readf(&fake_pdu, clnt->proto_version, "S", st); |
|
if (ret) { |
|
p9_debug(P9_DEBUG_9P, "<<< p9stat_read failed: %d\n", ret); |
|
trace_9p_protocol_dump(clnt, &fake_pdu); |
|
return ret; |
|
} |
|
|
|
return fake_pdu.offset; |
|
} |
|
EXPORT_SYMBOL(p9stat_read); |
|
|
|
int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type) |
|
{ |
|
pdu->id = type; |
|
return p9pdu_writef(pdu, 0, "dbw", 0, type, tag); |
|
} |
|
|
|
int p9pdu_finalize(struct p9_client *clnt, struct p9_fcall *pdu) |
|
{ |
|
int size = pdu->size; |
|
int err; |
|
|
|
pdu->size = 0; |
|
err = p9pdu_writef(pdu, 0, "d", size); |
|
pdu->size = size; |
|
|
|
trace_9p_protocol_dump(clnt, pdu); |
|
p9_debug(P9_DEBUG_9P, ">>> size=%d type: %d tag: %d\n", |
|
pdu->size, pdu->id, pdu->tag); |
|
|
|
return err; |
|
} |
|
|
|
void p9pdu_reset(struct p9_fcall *pdu) |
|
{ |
|
pdu->offset = 0; |
|
pdu->size = 0; |
|
} |
|
|
|
int p9dirent_read(struct p9_client *clnt, char *buf, int len, |
|
struct p9_dirent *dirent) |
|
{ |
|
struct p9_fcall fake_pdu; |
|
int ret; |
|
char *nameptr; |
|
|
|
fake_pdu.size = len; |
|
fake_pdu.capacity = len; |
|
fake_pdu.sdata = buf; |
|
fake_pdu.offset = 0; |
|
|
|
ret = p9pdu_readf(&fake_pdu, clnt->proto_version, "Qqbs", &dirent->qid, |
|
&dirent->d_off, &dirent->d_type, &nameptr); |
|
if (ret) { |
|
p9_debug(P9_DEBUG_9P, "<<< p9dirent_read failed: %d\n", ret); |
|
trace_9p_protocol_dump(clnt, &fake_pdu); |
|
return ret; |
|
} |
|
|
|
ret = strscpy(dirent->d_name, nameptr, sizeof(dirent->d_name)); |
|
if (ret < 0) { |
|
p9_debug(P9_DEBUG_ERROR, |
|
"On the wire dirent name too long: %s\n", |
|
nameptr); |
|
kfree(nameptr); |
|
return ret; |
|
} |
|
kfree(nameptr); |
|
|
|
return fake_pdu.offset; |
|
} |
|
EXPORT_SYMBOL(p9dirent_read);
|
|
|