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[PATCH] v9fs: zero copy implementation 

Performance enhancement reducing the number of copies in the data and
stat paths.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Latchesar Ionkov 2006-01-08 01:05:00 -08:00 committed by Linus Torvalds
parent d8da097afb
commit 531b1094b7
18 changed files with 1079 additions and 1043 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

288
fs/9p/9p.c
View File

@ -1,8 +1,9 @@
/*
* linux/fs/9p/9p.c
*
* This file contains functions 9P2000 functions
* This file contains functions to perform synchronous 9P calls
*
* Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
@ -33,6 +34,7 @@
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "conv.h"
#include "mux.h"
/**
@ -46,17 +48,21 @@
int
v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
char *version, struct v9fs_fcall **fcall)
char *version, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version);
msg.id = TVERSION;
msg.tag = ~0;
msg.params.tversion.msize = msize;
msg.params.tversion.version = version;
tc = v9fs_create_tversion(msize, version);
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -72,19 +78,23 @@ v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
int
v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
u32 fid, u32 afid, struct v9fs_fcall **fcall)
u32 fid, u32 afid, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall* tc;
dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
aname, fid, afid);
msg.id = TATTACH;
msg.params.tattach.fid = fid;
msg.params.tattach.afid = afid;
msg.params.tattach.uname = uname;
msg.params.tattach.aname = aname;
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
ret = -ENOMEM;
tc = v9fs_create_tattach(fid, afid, uname, aname);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
@ -117,24 +127,28 @@ static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
* @fcall: pointer to response fcall pointer
*
*/
int
v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
{
int err;
int ret;
struct v9fs_fcall *tc, *rc;
tc = kmalloc(sizeof(struct v9fs_fcall), GFP_KERNEL);
dprintk(DEBUG_9P, "fid %d\n", fid);
tc->id = TCLUNK;
tc->params.tclunk.fid = fid;
err = v9fs_mux_rpc(v9ses->mux, tc, &rc);
if (err >= 0) {
v9fs_t_clunk_cb(v9ses, tc, rc, 0);
}
ret = -ENOMEM;
rc = NULL;
tc = v9fs_create_tclunk(fid);
if (!IS_ERR(tc))
ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
else
ret = PTR_ERR(tc);
return err;
if (ret)
dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
v9fs_t_clunk_cb(v9ses, tc, rc, ret);
return ret;
}
/**
@ -144,14 +158,22 @@ v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
*
*/
int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 tag)
int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "oldtag %d\n", tag);
msg.id = TFLUSH;
msg.params.tflush.oldtag = tag;
return v9fs_mux_rpc(v9ses->mux, &msg, NULL);
dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
ret = -ENOMEM;
tc = v9fs_create_tflush(oldtag);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -163,17 +185,22 @@ int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 tag)
*/
int
v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **fcall)
v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d\n", fid);
if (fcall)
*fcall = NULL;
msg.id = TSTAT;
msg.params.tstat.fid = fid;
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
ret = -ENOMEM;
tc = v9fs_create_tstat(fid);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -187,16 +214,22 @@ v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **fcall)
int
v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
struct v9fs_stat *stat, struct v9fs_fcall **fcall)
struct v9fs_wstat *wstat, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d length %d\n", fid, (int)stat->length);
msg.id = TWSTAT;
msg.params.twstat.fid = fid;
msg.params.twstat.stat = stat;
dprintk(DEBUG_9P, "fid %d\n", fid);
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
ret = -ENOMEM;
tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -213,23 +246,28 @@ v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
int
v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
char *name, struct v9fs_fcall **fcall)
char *name, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
int nwname;
dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name);
msg.id = TWALK;
msg.params.twalk.fid = fid;
msg.params.twalk.newfid = newfid;
if (name) {
msg.params.twalk.nwname = 1;
msg.params.twalk.wnames = &name;
} else {
msg.params.twalk.nwname = 0;
}
if (name)
nwname = 1;
else
nwname = 0;
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
ret = -ENOMEM;
tc = v9fs_create_twalk(fid, newfid, nwname, &name);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -244,19 +282,22 @@ v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
int
v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
struct v9fs_fcall **fcall)
struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int errorno = -1;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
msg.id = TOPEN;
msg.params.topen.fid = fid;
msg.params.topen.mode = mode;
errorno = v9fs_mux_rpc(v9ses->mux, &msg, fcall);
ret = -ENOMEM;
tc = v9fs_create_topen(fid, mode);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return errorno;
return ret;
}
/**
@ -269,14 +310,22 @@ v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
int
v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
struct v9fs_fcall **fcall)
struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d\n", fid);
msg.id = TREMOVE;
msg.params.tremove.fid = fid;
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
ret = -ENOMEM;
tc = v9fs_create_tremove(fid);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -292,20 +341,23 @@ v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
int
v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
u32 perm, u8 mode, struct v9fs_fcall **fcall)
u32 perm, u8 mode, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
fid, name, perm, mode);
msg.id = TCREATE;
msg.params.tcreate.fid = fid;
msg.params.tcreate.name = name;
msg.params.tcreate.perm = perm;
msg.params.tcreate.mode = mode;
ret = -ENOMEM;
tc = v9fs_create_tcreate(fid, name, perm, mode);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
kfree(tc);
} else
ret = PTR_ERR(tc);
return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
return ret;
}
/**
@ -320,31 +372,30 @@ v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
int
v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
u32 count, struct v9fs_fcall **fcall)
u32 count, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
struct v9fs_fcall *rc = NULL;
long errorno = -1;
int ret;
struct v9fs_fcall *tc, *rc;
dprintk(DEBUG_9P, "fid %d offset 0x%lx count 0x%x\n", fid,
(long unsigned int)offset, count);
msg.id = TREAD;
msg.params.tread.fid = fid;
msg.params.tread.offset = offset;
msg.params.tread.count = count;
errorno = v9fs_mux_rpc(v9ses->mux, &msg, &rc);
dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
(long long unsigned) offset, count);
if (!errorno) {
errorno = rc->params.rread.count;
dump_data(rc->params.rread.data, rc->params.rread.count);
}
if (fcall)
*fcall = rc;
ret = -ENOMEM;
tc = v9fs_create_tread(fid, offset, count);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
if (!ret)
ret = rc->params.rread.count;
if (rcp)
*rcp = rc;
else
kfree(rc);
return errorno;
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
@ -358,32 +409,31 @@ v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
*/
int
v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid,
u64 offset, u32 count, void *data, struct v9fs_fcall **fcall)
v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
const char __user *data, struct v9fs_fcall **rcp)
{
struct v9fs_fcall msg;
struct v9fs_fcall *rc = NULL;
long errorno = -1;
int ret;
struct v9fs_fcall *tc, *rc;
dprintk(DEBUG_9P, "fid %d offset 0x%llx count 0x%x\n", fid,
(unsigned long long)offset, count);
dump_data(data, count);
dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
(long long unsigned) offset, count);
msg.id = TWRITE;
msg.params.twrite.fid = fid;
msg.params.twrite.offset = offset;
msg.params.twrite.count = count;
msg.params.twrite.data = data;
ret = -ENOMEM;
tc = v9fs_create_twrite(fid, offset, count, data);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
errorno = v9fs_mux_rpc(v9ses->mux, &msg, &rc);
if (!errorno)
errorno = rc->params.rwrite.count;
if (fcall)
*fcall = rc;
if (!ret)
ret = rc->params.rwrite.count;
if (rcp)
*rcp = rc;
else
kfree(rc);
return errorno;
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}

75
fs/9p/9p.h
View File

@ -3,6 +3,7 @@
*
* 9P protocol definitions.
*
* Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
@ -102,10 +103,16 @@ enum {
#define V9FS_NOTAG (u16)(~0)
#define V9FS_NOFID (u32)(~0)
#define V9FS_MAXWELEM 16
/* ample room for Twrite/Rread header (iounit) */
#define V9FS_IOHDRSZ 24
struct v9fs_str {
u16 len;
char *str;
};
/* qids are the unique ID for a file (like an inode */
struct v9fs_qid {
u8 type;
@ -115,6 +122,29 @@ struct v9fs_qid {
/* Plan 9 file metadata (stat) structure */
struct v9fs_stat {
u16 size;
u16 type;
u32 dev;
struct v9fs_qid qid;
u32 mode;
u32 atime;
u32 mtime;
u64 length;
struct v9fs_str name;
struct v9fs_str uid;
struct v9fs_str gid;
struct v9fs_str muid;
struct v9fs_str extension; /* 9p2000.u extensions */
u32 n_uid; /* 9p2000.u extensions */
u32 n_gid; /* 9p2000.u extensions */
u32 n_muid; /* 9p2000.u extensions */
};
/* file metadata (stat) structure used to create Twstat message
The is similar to v9fs_stat, but the strings don't point to
the same memory block and should be freed separately
*/
struct v9fs_wstat {
u16 size;
u16 type;
u32 dev;
@ -131,25 +161,24 @@ struct v9fs_stat {
u32 n_uid; /* 9p2000.u extensions */
u32 n_gid; /* 9p2000.u extensions */
u32 n_muid; /* 9p2000.u extensions */
char data[0];
};
/* Structures for Protocol Operations */
struct Tversion {
u32 msize;
char *version;
struct v9fs_str version;
};
struct Rversion {
u32 msize;
char *version;
struct v9fs_str version;
};
struct Tauth {
u32 afid;
char *uname;
char *aname;
struct v9fs_str uname;
struct v9fs_str aname;
};
struct Rauth {
@ -157,12 +186,12 @@ struct Rauth {
};
struct Rerror {
char *error;
struct v9fs_str error;
u32 errno; /* 9p2000.u extension */
};
struct Tflush {
u32 oldtag;
u16 oldtag;
};
struct Rflush {
@ -171,8 +200,8 @@ struct Rflush {
struct Tattach {
u32 fid;
u32 afid;
char *uname;
char *aname;
struct v9fs_str uname;
struct v9fs_str aname;
};
struct Rattach {
@ -182,13 +211,13 @@ struct Rattach {
struct Twalk {
u32 fid;
u32 newfid;
u32 nwname;
char **wnames;
u16 nwname;
struct v9fs_str wnames[16];
};
struct Rwalk {
u32 nwqid;
struct v9fs_qid *wqids;
u16 nwqid;
struct v9fs_qid wqids[16];
};
struct Topen {
@ -203,7 +232,7 @@ struct Ropen {
struct Tcreate {
u32 fid;
char *name;
struct v9fs_str name;
u32 perm;
u8 mode;
};
@ -254,12 +283,12 @@ struct Tstat {
};
struct Rstat {
struct v9fs_stat *stat;
struct v9fs_stat stat;
};
struct Twstat {
u32 fid;
struct v9fs_stat *stat;
struct v9fs_stat stat;
};
struct Rwstat {
@ -274,6 +303,7 @@ struct v9fs_fcall {
u32 size;
u8 id;
u16 tag;
void *sdata;
union {
struct Tversion tversion;
@ -306,10 +336,12 @@ struct v9fs_fcall {
} params;
};
#define V9FS_FCALLHDRSZ (sizeof(struct v9fs_fcall) + \
sizeof(struct v9fs_stat) + 16*sizeof(struct v9fs_qid) + 16)
#define PRINT_FCALL_ERROR(s, fcall) dprintk(DEBUG_ERROR, "%s: %.*s\n", s, \
fcall?fcall->params.rerror.error.len:0, \
fcall?fcall->params.rerror.error.str:"");
#define FCALL_ERROR(fcall) (fcall ? fcall->params.rerror.error : "")
char *v9fs_str_copy(char *buf, int buflen, struct v9fs_str *str);
int v9fs_str_compare(char *buf, struct v9fs_str *str);
int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
char *version, struct v9fs_fcall **rcall);
@ -325,7 +357,7 @@ int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid,
struct v9fs_fcall **rcall);
int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
struct v9fs_stat *stat, struct v9fs_fcall **rcall);
struct v9fs_wstat *wstat, struct v9fs_fcall **rcall);
int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
char *name, struct v9fs_fcall **rcall);
@ -343,4 +375,5 @@ int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
u64 offset, u32 count, struct v9fs_fcall **rcall);
int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
u32 count, void *data, struct v9fs_fcall **rcall);
u32 count, const char __user * data,
struct v9fs_fcall **rcall);

10
fs/9p/Makefile
View File

@ -1,17 +1,17 @@
obj-$(CONFIG_9P_FS) := 9p2000.o
9p2000-objs := \
trans_fd.o \
trans_sock.o \
mux.o \
9p.o \
conv.o \
vfs_super.o \
vfs_inode.o \
vfs_file.o \
vfs_dir.o \
vfs_dentry.o \
error.o \
mux.o \
trans_fd.o \
trans_sock.o \
9p.o \
conv.o \
v9fs.o \
fid.o

893
fs/9p/conv.c
View File

File diff suppressed because it is too large Load Diff

28
fs/9p/conv.h
View File

@ -1,8 +1,9 @@
/*
* linux/fs/9p/conv.h
*
* 9P protocol conversion definitions
* 9P protocol conversion definitions.
*
* Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
@ -25,11 +26,26 @@
*/
int v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
u32 statlen, int extended);
int v9fs_serialize_fcall(struct v9fs_fcall *tcall, void *buf, u32 buflen,
int extended);
int v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
int rcalllen, int extended);
int extended);
/* this one is actually in error.c right now */
int v9fs_errstr2errno(char *errstr);
void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag);
struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version);
struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname);
struct v9fs_fcall *v9fs_create_tattach(u32 fid, u32 afid, char *uname,
char *aname);
struct v9fs_fcall *v9fs_create_tflush(u16 oldtag);
struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
char **wnames);
struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode);
struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode);
struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count);
struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
const char __user *data);
struct v9fs_fcall *v9fs_create_tclunk(u32 fid);
struct v9fs_fcall *v9fs_create_tremove(u32 fid);
struct v9fs_fcall *v9fs_create_tstat(u32 fid);
struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
int extended);

23
fs/9p/debug.h
View File

@ -51,16 +51,23 @@ do { \
#if DEBUG_DUMP_PKT
static inline void dump_data(const unsigned char *data, unsigned int datalen)
{
int i, j;
int len = datalen;
int i, n;
char buf[5*8];
printk(KERN_DEBUG "data ");
for (i = 0; i < len; i += 4) {
for (j = 0; (j < 4) && (i + j < len); j++)
printk(KERN_DEBUG "%02x", data[i + j]);
printk(KERN_DEBUG " ");
n = 0;
i = 0;
while (i < datalen) {
n += snprintf(buf+n, sizeof(buf)-n, "%02x", data[i++]);
if (i%4 == 0)
n += snprintf(buf+n, sizeof(buf)-n, " ");
if (i%16 == 0) {
dprintk(DEBUG_ERROR, "%s\n", buf);
n = 0;
}
printk(KERN_DEBUG "\n");
}
dprintk(DEBUG_ERROR, "%s\n", buf);
}
#else /* DEBUG_DUMP_PKT */
static inline void dump_data(const unsigned char *data, unsigned int datalen)

10
fs/9p/error.c
View File

@ -33,7 +33,6 @@
#include <linux/list.h>
#include <linux/jhash.h>
#include <linux/string.h>
#include "debug.h"
#include "error.h"
@ -55,7 +54,8 @@ int v9fs_error_init(void)
/* load initial error map into hash table */
for (c = errmap; c->name != NULL; c++) {
bucket = jhash(c->name, strlen(c->name), 0) % ERRHASHSZ;
c->namelen = strlen(c->name);
bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
INIT_HLIST_NODE(&c->list);
hlist_add_head(&c->list, &hash_errmap[bucket]);
}
@ -69,15 +69,15 @@ int v9fs_error_init(void)
*
*/
int v9fs_errstr2errno(char *errstr)
int v9fs_errstr2errno(char *errstr, int len)
{
int errno = 0;
struct hlist_node *p = NULL;
struct errormap *c = NULL;
int bucket = jhash(errstr, strlen(errstr), 0) % ERRHASHSZ;
int bucket = jhash(errstr, len, 0) % ERRHASHSZ;
hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
if (!strcmp(c->name, errstr)) {
if (c->namelen==len && !memcmp(c->name, errstr, len)) {
errno = c->val;
break;
}

3
fs/9p/error.h
View File

@ -36,6 +36,7 @@ struct errormap {
char *name;
int val;
int namelen;
struct hlist_node list;
};
@ -175,4 +176,4 @@ static struct errormap errmap[] = {
};
extern int v9fs_error_init(void);
extern int v9fs_errstr2errno(char *errstr);
extern int v9fs_errstr2errno(char *errstr, int len);

3
fs/9p/fid.c
View File

@ -31,9 +31,6 @@
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "transport.h"
#include "mux.h"
#include "conv.h"
#include "fid.h"
/**

155
fs/9p/mux.c
View File

@ -35,8 +35,8 @@
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "transport.h"
#include "conv.h"
#include "transport.h"
#include "mux.h"
#define ERREQFLUSH 1
@ -74,6 +74,7 @@ struct v9fs_mux_data {
wait_queue_head_t equeue;
struct list_head req_list;
struct list_head unsent_req_list;
struct v9fs_fcall *rcall;
int rpos;
char *rbuf;
int wpos;
@ -101,11 +102,15 @@ struct v9fs_mux_rpc {
wait_queue_head_t wqueue;
};
extern int v9fs_errstr2errno(char *str, int len);
static int v9fs_poll_proc(void *);
static void v9fs_read_work(void *);
static void v9fs_write_work(void *);
static void v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address,
poll_table * p);
static u16 v9fs_mux_get_tag(struct v9fs_mux_data *);
static void v9fs_mux_put_tag(struct v9fs_mux_data *, u16);
static DECLARE_MUTEX(v9fs_mux_task_lock);
static struct workqueue_struct *v9fs_mux_wq;
@ -166,8 +171,9 @@ static void v9fs_mux_poll_start(struct v9fs_mux_data *m)
if (v9fs_mux_poll_tasks[i].task == NULL) {
vpt = &v9fs_mux_poll_tasks[i];
dprintk(DEBUG_MUX, "create proc %p\n", vpt);
vpt->task = kthread_create(v9fs_poll_proc,
vpt, "v9fs-poll");
vpt->task =
kthread_create(v9fs_poll_proc, vpt,
"v9fs-poll");
INIT_LIST_HEAD(&vpt->mux_list);
vpt->muxnum = 0;
v9fs_mux_poll_task_num++;
@ -253,7 +259,7 @@ struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
struct v9fs_mux_data *m, *mtmp;
dprintk(DEBUG_MUX, "transport %p msize %d\n", trans, msize);
m = kmalloc(sizeof(struct v9fs_mux_data) + 2 * msize, GFP_KERNEL);
m = kmalloc(sizeof(struct v9fs_mux_data), GFP_KERNEL);
if (!m)
return ERR_PTR(-ENOMEM);
@ -268,10 +274,11 @@ struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
init_waitqueue_head(&m->equeue);
INIT_LIST_HEAD(&m->req_list);
INIT_LIST_HEAD(&m->unsent_req_list);
m->rcall = NULL;
m->rpos = 0;
m->rbuf = (char *)m + sizeof(struct v9fs_mux_data);
m->rbuf = NULL;
m->wpos = m->wsize = 0;
m->wbuf = m->rbuf + msize;
m->wbuf = NULL;
INIT_WORK(&m->rq, v9fs_read_work, m);
INIT_WORK(&m->wq, v9fs_write_work, m);
m->wsched = 0;
@ -427,29 +434,6 @@ static int v9fs_poll_proc(void *a)
return 0;
}
static inline int v9fs_write_req(struct v9fs_mux_data *m, struct v9fs_req *req)
{
int n;
list_move_tail(&req->req_list, &m->req_list);
n = v9fs_serialize_fcall(req->tcall, m->wbuf, m->msize, *m->extended);
if (n < 0) {
req->err = n;
list_del(&req->req_list);
if (req->cb) {
spin_unlock(&m->lock);
(*req->cb) (req->cba, req->tcall, req->rcall, req->err);
req->cb = NULL;
spin_lock(&m->lock);
} else
kfree(req->rcall);
kfree(req);
}
return n;
}
/**
* v9fs_write_work - called when a transport can send some data
*/
@ -457,7 +441,7 @@ static void v9fs_write_work(void *a)
{
int n, err;
struct v9fs_mux_data *m;
struct v9fs_req *req, *rtmp;
struct v9fs_req *req;
m = a;
@ -472,17 +456,15 @@ static void v9fs_write_work(void *a)
return;
}
err = 0;
spin_lock(&m->lock);
list_for_each_entry_safe(req, rtmp, &m->unsent_req_list,
req_list) {
err = v9fs_write_req(m, req);
if (err > 0)
break;
}
m->wsize = err;
req =
list_entry(m->unsent_req_list.next, struct v9fs_req,
req_list);
list_move_tail(&req->req_list, &m->req_list);
m->wbuf = req->tcall->sdata;
m->wsize = req->tcall->size;
m->wpos = 0;
dump_data(m->wbuf, m->wsize);
spin_unlock(&m->lock);
}
@ -526,24 +508,23 @@ static void v9fs_write_work(void *a)
static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
{
int ecode, tag;
char *ename;
struct v9fs_str *ename;
tag = req->tag;
if (req->rcall->id == RERROR && !req->err) {
ecode = req->rcall->params.rerror.errno;
ename = req->rcall->params.rerror.error;
ename = &req->rcall->params.rerror.error;
dprintk(DEBUG_MUX, "Rerror %s\n", ename);
dprintk(DEBUG_MUX, "Rerror %.*s\n", ename->len, ename->str);
if (*m->extended)
req->err = -ecode;
if (!req->err) {
req->err = v9fs_errstr2errno(ename);
req->err = v9fs_errstr2errno(ename->str, ename->len);
if (!req->err) { /* string match failed */
dprintk(DEBUG_ERROR, "unknown error: %s\n",
ename);
PRINT_FCALL_ERROR("unknown error", req->rcall);
}
if (!req->err)
@ -565,8 +546,7 @@ static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
} else
kfree(req->rcall);
if (tag != V9FS_NOTAG)
v9fs_put_idpool(tag, &m->tidpool);
v9fs_mux_put_tag(m, tag);
wake_up(&m->equeue);
kfree(req);
@ -577,10 +557,11 @@ static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
*/
static void v9fs_read_work(void *a)
{
int n, err, rcallen;
int n, err;
struct v9fs_mux_data *m;
struct v9fs_req *req, *rptr, *rreq;
struct v9fs_fcall *rcall;
char *rbuf;
m = a;
@ -589,6 +570,19 @@ static void v9fs_read_work(void *a)
rcall = NULL;
dprintk(DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos);
if (!m->rcall) {
m->rcall =
kmalloc(sizeof(struct v9fs_fcall) + m->msize, GFP_KERNEL);
if (!m->rcall) {
err = -ENOMEM;
goto error;
}
m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
m->rpos = 0;
}
clear_bit(Rpending, &m->wsched);
err = m->trans->read(m->trans, m->rbuf + m->rpos, m->msize - m->rpos);
dprintk(DEBUG_MUX, "mux %p got %d bytes\n", m, err);
@ -613,19 +607,30 @@ static void v9fs_read_work(void *a)
if (m->rpos < n)
break;
rcallen = n + V9FS_FCALLHDRSZ;
rcall = kmalloc(rcallen, GFP_KERNEL);
if (!rcall) {
dump_data(m->rbuf, n);
err =
v9fs_deserialize_fcall(m->rbuf, n, m->rcall, *m->extended);
if (err < 0) {
goto error;
}
rcall = m->rcall;
rbuf = m->rbuf;
if (m->rpos > n) {
m->rcall = kmalloc(sizeof(struct v9fs_fcall) + m->msize,
GFP_KERNEL);
if (!m->rcall) {
err = -ENOMEM;
goto error;
}
dump_data(m->rbuf, n);
err = v9fs_deserialize_fcall(m->rbuf, n, rcall, rcallen,
*m->extended);
if (err < 0) {
kfree(rcall);
goto error;
m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
memmove(m->rbuf, rbuf + n, m->rpos - n);
m->rpos -= n;
} else {
m->rcall = NULL;
m->rbuf = NULL;
m->rpos = 0;
}
dprintk(DEBUG_MUX, "mux %p fcall id %d tag %d\n", m, rcall->id,
@ -642,6 +647,7 @@ static void v9fs_read_work(void *a)
process_request(m, req);
break;
}
}
if (!req) {
@ -652,10 +658,6 @@ static void v9fs_read_work(void *a)
m, rcall->id, rcall->tag);
kfree(rcall);
}
if (m->rpos > n)
memmove(m->rbuf, m->rbuf + n, m->rpos - n);
m->rpos -= n;
}
if (!list_empty(&m->req_list)) {
@ -710,12 +712,13 @@ static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
if (tc->id == TVERSION)
n = V9FS_NOTAG;
else
n = v9fs_get_idpool(&m->tidpool);
n = v9fs_mux_get_tag(m);
if (n < 0)
return ERR_PTR(-ENOMEM);
tc->tag = n;
v9fs_set_tag(tc, n);
req->tag = n;
req->tcall = tc;
req->rcall = NULL;
@ -773,9 +776,7 @@ v9fs_mux_flush_cb(void *a, struct v9fs_fcall *tc, struct v9fs_fcall *rc,
if (!cb)
spin_unlock(&m->lock);
if (v9fs_check_idpool(tag, &m->tidpool))
v9fs_put_idpool(tag, &m->tidpool);
v9fs_mux_put_tag(m, tag);
kfree(tc);
kfree(rc);
}
@ -787,10 +788,7 @@ v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req)
dprintk(DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
fc = kmalloc(sizeof(struct v9fs_fcall), GFP_KERNEL);
fc->id = TFLUSH;
fc->params.tflush.oldtag = req->tag;
fc = v9fs_create_tflush(req->tag);
v9fs_send_request(m, fc, v9fs_mux_flush_cb, m);
}
@ -939,3 +937,20 @@ void v9fs_mux_cancel(struct v9fs_mux_data *m, int err)
wake_up(&m->equeue);
}
static u16 v9fs_mux_get_tag(struct v9fs_mux_data *m)
{
int tag;
tag = v9fs_get_idpool(&m->tidpool);
if (tag < 0)
return V9FS_NOTAG;
else
return (u16) tag;
}
static void v9fs_mux_put_tag(struct v9fs_mux_data *m, u16 tag)
{
if (tag != V9FS_NOTAG && v9fs_check_idpool(tag, &m->tidpool))
v9fs_put_idpool(tag, &m->tidpool);
}

1
fs/9p/trans_sock.c
View File

@ -110,7 +110,6 @@ static int v9fs_sock_send(struct v9fs_transport *trans, void *v, int len)
if (!(ts->filp->f_flags & O_NONBLOCK))
dprintk(DEBUG_ERROR, "blocking write ...\n");
dump_data(v, len);
oldfs = get_fs();
set_fs(get_ds());
ret = vfs_write(ts->filp, (void __user *)v, len, &ts->filp->f_pos);

3
fs/9p/v9fs.c
View File

@ -37,7 +37,6 @@
#include "v9fs_vfs.h"
#include "transport.h"
#include "mux.h"
#include "conv.h"
/* TODO: sysfs or debugfs interface */
int v9fs_debug_level = 0; /* feature-rific global debug level */
@ -353,7 +352,7 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
}
/* Really should check for 9P1 and report error */
if (!strcmp(fcall->params.rversion.version, "9P2000.u")) {
if (!v9fs_str_compare("9P2000.u", &fcall->params.rversion.version)) {
dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n");
v9ses->extended = 1;
} else {

5
fs/9p/v9fs_vfs.h
View File

@ -45,9 +45,8 @@ extern struct dentry_operations v9fs_dentry_operations;
struct inode *v9fs_get_inode(struct super_block *sb, int mode);
ino_t v9fs_qid2ino(struct v9fs_qid *qid);
void v9fs_mistat2inode(struct v9fs_stat *, struct inode *,
struct super_block *);
void v9fs_stat2inode(struct v9fs_stat *, struct inode *, struct super_block *);
int v9fs_dir_release(struct inode *inode, struct file *filp);
int v9fs_file_open(struct inode *inode, struct file *file);
void v9fs_inode2mistat(struct inode *inode, struct v9fs_stat *mistat);
void v9fs_inode2stat(struct inode *inode, struct v9fs_stat *stat);
void v9fs_dentry_release(struct dentry *);

4
fs/9p/vfs_dentry.c
View File

@ -40,7 +40,6 @@
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "conv.h"
#include "fid.h"
/**
@ -108,7 +107,8 @@ void v9fs_dentry_release(struct dentry *dentry)
err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid);
if (err < 0)
dprintk(DEBUG_ERROR, "clunk failed: %d\n", err);
dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n",
err, dentry->d_iname);
v9fs_fid_destroy(current_fid);
}

29
fs/9p/vfs_dir.c
View File

@ -37,8 +37,8 @@
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "conv.h"
#include "v9fs_vfs.h"
#include "fid.h"
/**
@ -77,17 +77,13 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
unsigned int i, n, s;
int fid = -1;
int ret = 0;
struct v9fs_stat *mi = NULL;
struct v9fs_stat stat;
int over = 0;
dprintk(DEBUG_VFS, "name %s\n", filp->f_dentry->d_name.name);
fid = file->fid;
mi = kmalloc(v9ses->maxdata, GFP_KERNEL);
if (!mi)
return -ENOMEM;
if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
kfree(file->rdir_fcall);
file->rdir_fcall = NULL;
@ -99,18 +95,18 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
while (i < n) {
s = v9fs_deserialize_stat(
file->rdir_fcall->params.rread.data + i,
n - i, mi, v9ses->maxdata, v9ses->extended);
n - i, &stat, v9ses->extended);
if (s == 0) {
dprintk(DEBUG_ERROR,
"error while deserializing mistat\n");
"error while deserializing stat\n");
ret = -EIO;
goto FreeStructs;
}
over = filldir(dirent, mi->name, strlen(mi->name),
filp->f_pos, v9fs_qid2ino(&mi->qid),
dt_type(mi));
over = filldir(dirent, stat.name.str, stat.name.len,
filp->f_pos, v9fs_qid2ino(&stat.qid),
dt_type(&stat));
if (over) {
file->rdir_fpos = i;
@ -142,17 +138,17 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
i = 0;
while (i < n) {
s = v9fs_deserialize_stat(fcall->params.rread.data + i,
n - i, mi, v9ses->maxdata, v9ses->extended);
n - i, &stat, v9ses->extended);
if (s == 0) {
dprintk(DEBUG_ERROR,
"error while deserializing mistat\n");
"error while deserializing stat\n");
return -EIO;
}
over = filldir(dirent, mi->name, strlen(mi->name),
filp->f_pos, v9fs_qid2ino(&mi->qid),
dt_type(mi));
over = filldir(dirent, stat.name.str, stat.name.len,
filp->f_pos, v9fs_qid2ino(&stat.qid),
dt_type(&stat));
if (over) {
file->rdir_fcall = fcall;
@ -171,7 +167,6 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
FreeStructs:
kfree(fcall);
kfree(mi);
return ret;
}

25
fs/9p/vfs_file.c
View File

@ -32,6 +32,7 @@
#include <linux/string.h>
#include <linux/smp_lock.h>
#include <linux/inet.h>
#include <linux/version.h>
#include <linux/list.h>
#include <asm/uaccess.h>
#include <linux/idr.h>
@ -117,9 +118,7 @@ int v9fs_file_open(struct inode *inode, struct file *file)
result = v9fs_t_open(v9ses, newfid, open_mode, &fcall);
if (result < 0) {
dprintk(DEBUG_ERROR,
"open failed, open_mode 0x%x: %s\n", open_mode,
FCALL_ERROR(fcall));
PRINT_FCALL_ERROR("open failed", fcall);
kfree(fcall);
return result;
}
@ -256,7 +255,6 @@ v9fs_file_write(struct file *filp, const char __user * data,
int result = -EIO;
int rsize = 0;
int total = 0;
char *buf;
dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
(int)*offset);
@ -264,28 +262,14 @@ v9fs_file_write(struct file *filp, const char __user * data,
if (v9fid->iounit != 0 && rsize > v9fid->iounit)
rsize = v9fid->iounit;
buf = kmalloc(v9ses->maxdata - V9FS_IOHDRSZ, GFP_KERNEL);
if (!buf)
return -ENOMEM;
do {
if (count < rsize)
rsize = count;
result = copy_from_user(buf, data, rsize);
if (result) {
dprintk(DEBUG_ERROR, "Problem copying from user\n");
kfree(buf);
return -EFAULT;
}
dump_data(buf, rsize);
result = v9fs_t_write(v9ses, fid, *offset, rsize, buf, &fcall);
result = v9fs_t_write(v9ses, fid, *offset, rsize, data, &fcall);
if (result < 0) {
eprintk(KERN_ERR, "error while writing: %s(%d)\n",
FCALL_ERROR(fcall), result);
PRINT_FCALL_ERROR("error while writing", fcall);
kfree(fcall);
kfree(buf);
return result;
} else
*offset += result;
@ -305,7 +289,6 @@ v9fs_file_write(struct file *filp, const char __user * data,
total += result;
} while (count);
kfree(buf);
return total;
}

545
fs/9p/vfs_inode.c
View File

@ -40,7 +40,6 @@
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "conv.h"
#include "fid.h"
static struct inode_operations v9fs_dir_inode_operations;
@ -127,100 +126,32 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
}
/**
* v9fs_blank_mistat - helper function to setup a 9P stat structure
* v9fs_blank_wstat - helper function to setup a 9P stat structure
* @v9ses: 9P session info (for determining extended mode)
* @mistat: structure to initialize
* @wstat: structure to initialize
*
*/
static void
v9fs_blank_mistat(struct v9fs_session_info *v9ses, struct v9fs_stat *mistat)
v9fs_blank_wstat(struct v9fs_wstat *wstat)
{
mistat->type = ~0;
mistat->dev = ~0;
mistat->qid.type = ~0;
mistat->qid.version = ~0;
*((long long *)&mistat->qid.path) = ~0;
mistat->mode = ~0;
mistat->atime = ~0;
mistat->mtime = ~0;
mistat->length = ~0;
mistat->name = mistat->data;
mistat->uid = mistat->data;
mistat->gid = mistat->data;
mistat->muid = mistat->data;
if (v9ses->extended) {
mistat->n_uid = ~0;
mistat->n_gid = ~0;
mistat->n_muid = ~0;
mistat->extension = mistat->data;
}
*mistat->data = 0;
}
/**
* v9fs_mistat2unix - convert mistat to unix stat
* @mistat: Plan 9 metadata (mistat) structure
* @buf: unix metadata (stat) structure to populate
* @sb: superblock
*
*/
static void
v9fs_mistat2unix(struct v9fs_stat *mistat, struct stat *buf,
struct super_block *sb)
{
struct v9fs_session_info *v9ses = sb ? sb->s_fs_info : NULL;
buf->st_nlink = 1;
buf->st_atime = mistat->atime;
buf->st_mtime = mistat->mtime;
buf->st_ctime = mistat->mtime;
buf->st_uid = (unsigned short)-1;
buf->st_gid = (unsigned short)-1;
if (v9ses && v9ses->extended) {
/* TODO: string to uid mapping via user-space daemon */
if (mistat->n_uid != -1)
sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid);
if (mistat->n_gid != -1)
sscanf(mistat->gid, "%x", (unsigned int *)&buf->st_gid);
}
if (buf->st_uid == (unsigned short)-1)
buf->st_uid = v9ses->uid;
if (buf->st_gid == (unsigned short)-1)
buf->st_gid = v9ses->gid;
buf->st_mode = p9mode2unixmode(v9ses, mistat->mode);
if ((S_ISBLK(buf->st_mode)) || (S_ISCHR(buf->st_mode))) {
char type = 0;
int major = -1;
int minor = -1;
sscanf(mistat->extension, "%c %u %u", &type, &major, &minor);
switch (type) {
case 'c':
buf->st_mode &= ~S_IFBLK;
buf->st_mode |= S_IFCHR;
break;
case 'b':
break;
default:
dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n",
type, mistat->extension);
};
buf->st_rdev = MKDEV(major, minor);
} else
buf->st_rdev = 0;
buf->st_size = mistat->length;
buf->st_blksize = sb->s_blocksize;
buf->st_blocks =
(buf->st_size + buf->st_blksize - 1) >> sb->s_blocksize_bits;
wstat->type = ~0;
wstat->dev = ~0;
wstat->qid.type = ~0;
wstat->qid.version = ~0;
*((long long *)&wstat->qid.path) = ~0;
wstat->mode = ~0;
wstat->atime = ~0;
wstat->mtime = ~0;
wstat->length = ~0;
wstat->name = NULL;
wstat->uid = NULL;
wstat->gid = NULL;
wstat->muid = NULL;
wstat->n_uid = ~0;
wstat->n_gid = ~0;
wstat->n_muid = ~0;
wstat->extension = NULL;
}
/**
@ -312,7 +243,6 @@ v9fs_create(struct inode *dir,
struct inode *file_inode = NULL;
struct v9fs_fcall *fcall = NULL;
struct v9fs_qid qid;
struct stat newstat;
int dirfidnum = -1;
long newfid = -1;
int result = 0;
@ -350,7 +280,7 @@ v9fs_create(struct inode *dir,
result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall);
if (result < 0) {
dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
PRINT_FCALL_ERROR("clone error", fcall);
v9fs_put_idpool(newfid, &v9ses->fidpool);
newfid = -1;
goto CleanUpFid;
@ -362,9 +292,7 @@ v9fs_create(struct inode *dir,
result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name,
perm, open_mode, &fcall);
if (result < 0) {
dprintk(DEBUG_ERROR, "create fails: %s(%d)\n",
FCALL_ERROR(fcall), result);
PRINT_FCALL_ERROR("create fails", fcall);
goto CleanUpFid;
}
@ -400,7 +328,7 @@ v9fs_create(struct inode *dir,
result = v9fs_t_walk(v9ses, dirfidnum, wfidno,
(char *) file_dentry->d_name.name, &fcall);
if (result < 0) {
dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
PRINT_FCALL_ERROR("clone error", fcall);
v9fs_put_idpool(wfidno, &v9ses->fidpool);
wfidno = -1;
goto CleanUpFid;
@ -421,21 +349,21 @@ v9fs_create(struct inode *dir,
result = v9fs_t_stat(v9ses, wfidno, &fcall);
if (result < 0) {
dprintk(DEBUG_ERROR, "stat error: %s(%d)\n", FCALL_ERROR(fcall),
result);
PRINT_FCALL_ERROR("stat error", fcall);
goto CleanUpFid;
}
v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb);
file_inode = v9fs_get_inode(sb, newstat.st_mode);
file_inode = v9fs_get_inode(sb,
p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode));
if ((!file_inode) || IS_ERR(file_inode)) {
dprintk(DEBUG_ERROR, "create inode failed\n");
result = -EBADF;
goto CleanUpFid;
}
v9fs_mistat2inode(fcall->params.rstat.stat, file_inode, sb);
v9fs_stat2inode(&fcall->params.rstat.stat, file_inode, sb);
kfree(fcall);
fcall = NULL;
file_dentry->d_op = &v9fs_dentry_operations;
@ -500,10 +428,9 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
}
result = v9fs_t_remove(v9ses, fid, &fcall);
if (result < 0)
dprintk(DEBUG_ERROR, "remove of file fails: %s(%d)\n",
FCALL_ERROR(fcall), result);
else {
if (result < 0) {
PRINT_FCALL_ERROR("remove fails", fcall);
} else {
v9fs_put_idpool(fid, &v9ses->fidpool);
v9fs_fid_destroy(v9fid);
}
@ -558,7 +485,6 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
struct v9fs_fid *fid;
struct inode *inode;
struct v9fs_fcall *fcall = NULL;
struct stat newstat;
int dirfidnum = -1;
int newfid = -1;
int result = 0;
@ -611,8 +537,8 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
goto FreeFcall;
}
v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb);
inode = v9fs_get_inode(sb, newstat.st_mode);
inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses,
fcall->params.rstat.stat.mode));
if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
@ -622,7 +548,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
goto FreeFcall;
}
inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat->qid);
inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid);
fid = v9fs_fid_create(dentry, v9ses, newfid, 0);
if (fid == NULL) {
@ -631,10 +557,10 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
goto FreeFcall;
}
fid->qid = fcall->params.rstat.stat->qid;
fid->qid = fcall->params.rstat.stat.qid;
dentry->d_op = &v9fs_dentry_operations;
v9fs_mistat2inode(fcall->params.rstat.stat, inode, inode->i_sb);
v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
d_add(dentry, inode);
kfree(fcall);
@ -690,7 +616,7 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
v9fs_fid_lookup(old_dentry->d_parent);
struct v9fs_fid *newdirfid =
v9fs_fid_lookup(new_dentry->d_parent);
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
struct v9fs_wstat wstat;
struct v9fs_fcall *fcall = NULL;
int fid = -1;
int olddirfidnum = -1;
@ -699,9 +625,6 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
dprintk(DEBUG_VFS, "\n");
if (!mistat)
return -ENOMEM;
if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
dprintk(DEBUG_ERROR, "problem with arguments\n");
return -EBADF;
@ -725,26 +648,15 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto FreeFcallnBail;
}
v9fs_blank_mistat(v9ses, mistat);
v9fs_blank_wstat(&wstat);
wstat.muid = v9ses->name;
wstat.name = (char *) new_dentry->d_name.name;
strcpy(mistat->data + 1, v9ses->name);
mistat->name = mistat->data + 1 + strlen(v9ses->name);
if (new_dentry->d_name.len >
(v9ses->maxdata - strlen(v9ses->name) - sizeof(struct v9fs_stat))) {
dprintk(DEBUG_ERROR, "new name too long\n");
goto FreeFcallnBail;
}
strcpy(mistat->name, new_dentry->d_name.name);
retval = v9fs_t_wstat(v9ses, fid, mistat, &fcall);
retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall);
FreeFcallnBail:
kfree(mistat);
if (retval < 0)
dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
FCALL_ERROR(fcall));
PRINT_FCALL_ERROR("wstat error", fcall);
kfree(fcall);
return retval;
@ -779,7 +691,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
if (err < 0)
dprintk(DEBUG_ERROR, "stat error\n");
else {
v9fs_mistat2inode(fcall->params.rstat.stat, dentry->d_inode,
v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode,
dentry->d_inode->i_sb);
generic_fillattr(dentry->d_inode, stat);
}
@ -800,57 +712,44 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
struct v9fs_wstat wstat;
int res = -EPERM;
dprintk(DEBUG_VFS, "\n");
if (!mistat)
return -ENOMEM;
if (!fid) {
dprintk(DEBUG_ERROR,
"Couldn't find fid associated with dentry\n");
return -EBADF;
}
v9fs_blank_mistat(v9ses, mistat);
v9fs_blank_wstat(&wstat);
if (iattr->ia_valid & ATTR_MODE)
mistat->mode = unixmode2p9mode(v9ses, iattr->ia_mode);
wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
if (iattr->ia_valid & ATTR_MTIME)
mistat->mtime = iattr->ia_mtime.tv_sec;
wstat.mtime = iattr->ia_mtime.tv_sec;
if (iattr->ia_valid & ATTR_ATIME)
mistat->atime = iattr->ia_atime.tv_sec;
wstat.atime = iattr->ia_atime.tv_sec;
if (iattr->ia_valid & ATTR_SIZE)
mistat->length = iattr->ia_size;
wstat.length = iattr->ia_size;
if (v9ses->extended) {
char *ptr = mistat->data+1;
if (iattr->ia_valid & ATTR_UID)
wstat.n_uid = iattr->ia_uid;
if (iattr->ia_valid & ATTR_UID) {
mistat->uid = ptr;
ptr += 1+sprintf(ptr, "%08x", iattr->ia_uid);
mistat->n_uid = iattr->ia_uid;
if (iattr->ia_valid & ATTR_GID)
wstat.n_gid = iattr->ia_gid;
}
if (iattr->ia_valid & ATTR_GID) {
mistat->gid = ptr;
ptr += 1+sprintf(ptr, "%08x", iattr->ia_gid);
mistat->n_gid = iattr->ia_gid;
}
}
res = v9fs_t_wstat(v9ses, fid->fid, mistat, &fcall);
res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall);
if (res < 0)
dprintk(DEBUG_ERROR, "wstat error: %s\n", FCALL_ERROR(fcall));
PRINT_FCALL_ERROR("wstat error", fcall);
kfree(mistat);
kfree(fcall);
if (res >= 0)
res = inode_setattr(dentry->d_inode, iattr);
@ -858,51 +757,42 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
}
/**
* v9fs_mistat2inode - populate an inode structure with mistat info
* @mistat: Plan 9 metadata (mistat) structure
* v9fs_stat2inode - populate an inode structure with mistat info
* @stat: Plan 9 metadata (mistat) structure
* @inode: inode to populate
* @sb: superblock of filesystem
*
*/
void
v9fs_mistat2inode(struct v9fs_stat *mistat, struct inode *inode,
v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
struct super_block *sb)
{
char ext[32];
struct v9fs_session_info *v9ses = sb->s_fs_info;
inode->i_nlink = 1;
inode->i_atime.tv_sec = mistat->atime;
inode->i_mtime.tv_sec = mistat->mtime;
inode->i_ctime.tv_sec = mistat->mtime;
inode->i_atime.tv_sec = stat->atime;
inode->i_mtime.tv_sec = stat->mtime;
inode->i_ctime.tv_sec = stat->mtime;
inode->i_uid = -1;
inode->i_gid = -1;
if (v9ses->extended) {
/* TODO: string to uid mapping via user-space daemon */
inode->i_uid = mistat->n_uid;
inode->i_gid = mistat->n_gid;
if (mistat->n_uid == -1)
sscanf(mistat->uid, "%x", &inode->i_uid);
if (mistat->n_gid == -1)
sscanf(mistat->gid, "%x", &inode->i_gid);
}
if (inode->i_uid == -1)
inode->i_uid = v9ses->uid;
if (inode->i_gid == -1)
inode->i_gid = v9ses->gid;
inode->i_mode = p9mode2unixmode(v9ses, mistat->mode);
if (v9ses->extended) {
inode->i_uid = stat->n_uid;
inode->i_gid = stat->n_gid;
}
inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
char type = 0;
int major = -1;
int minor = -1;
sscanf(mistat->extension, "%c %u %u", &type, &major, &minor);
v9fs_str_copy(ext, sizeof(ext), &stat->extension);
sscanf(ext, "%c %u %u", &type, &major, &minor);
switch (type) {
case 'c':
inode->i_mode &= ~S_IFBLK;
@ -911,14 +801,14 @@ v9fs_mistat2inode(struct v9fs_stat *mistat, struct inode *inode,
case 'b':
break;
default:
dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n",
type, mistat->extension);
dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n",
type, stat->extension.len, stat->extension.str);
};
inode->i_rdev = MKDEV(major, minor);
} else
inode->i_rdev = 0;
inode->i_size = mistat->length;
inode->i_size = stat->length;
inode->i_blksize = sb->s_blocksize;
inode->i_blocks =
@ -945,72 +835,6 @@ ino_t v9fs_qid2ino(struct v9fs_qid *qid)
return i;
}
/**
* v9fs_vfs_symlink - helper function to create symlinks
* @dir: directory inode containing symlink
* @dentry: dentry for symlink
* @symname: symlink data
*
* See 9P2000.u RFC for more information
*
*/
static int
v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
int retval = -EPERM;
struct v9fs_fid *newfid;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
int err;
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
symname);
if (!mistat)
return -ENOMEM;
if (!v9ses->extended) {
dprintk(DEBUG_ERROR, "not extended\n");
goto FreeFcall;
}
/* issue a create */
retval = v9fs_create(dir, dentry, S_IFLNK, 0);
if (retval != 0)
goto FreeFcall;
newfid = v9fs_fid_lookup(dentry);
/* issue a twstat */
v9fs_blank_mistat(v9ses, mistat);
strcpy(mistat->data + 1, symname);
mistat->extension = mistat->data + 1;
retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
if (retval < 0) {
dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
FCALL_ERROR(fcall));
goto FreeFcall;
}
kfree(fcall);
err = v9fs_t_clunk(v9ses, newfid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %d\n", err);
goto FreeFcall;
}
d_drop(dentry); /* FID - will this also clunk? */
FreeFcall:
kfree(mistat);
kfree(fcall);
return retval;
}
/**
* v9fs_readlink - read a symlink's location (internal version)
* @dentry: dentry for symlink
@ -1050,16 +874,17 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
if (!fcall)
return -EIO;
if (!(fcall->params.rstat.stat->mode & V9FS_DMSYMLINK)) {
if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) {
retval = -EINVAL;
goto FreeFcall;
}
/* copy extension buffer into buffer */
if (strlen(fcall->params.rstat.stat->extension) < buflen)
buflen = strlen(fcall->params.rstat.stat->extension);
if (fcall->params.rstat.stat.extension.len < buflen)
buflen = fcall->params.rstat.stat.extension.len;
memcpy(buffer, fcall->params.rstat.stat->extension, buflen + 1);
memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
buffer[buflen-1] = 0;
retval = buflen;
@ -1149,6 +974,77 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void
__putname(s);
}
static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
int mode, const char *extension)
{
int err, retval;
struct v9fs_session_info *v9ses;
struct v9fs_fcall *fcall;
struct v9fs_fid *fid;
struct v9fs_wstat wstat;
v9ses = v9fs_inode2v9ses(dir);
retval = -EPERM;
fcall = NULL;
if (!v9ses->extended) {
dprintk(DEBUG_ERROR, "not extended\n");
goto free_mem;
}
/* issue a create */
retval = v9fs_create(dir, dentry, mode, 0);
if (retval != 0)
goto free_mem;
fid = v9fs_fid_get_created(dentry);
if (!fid) {
dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n");
goto free_mem;
}
/* issue a Twstat */
v9fs_blank_wstat(&wstat);
wstat.muid = v9ses->name;
wstat.extension = (char *) extension;
retval = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall);
if (retval < 0) {
PRINT_FCALL_ERROR("wstat error", fcall);
goto free_mem;
}
err = v9fs_t_clunk(v9ses, fid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk failed: %d\n", err);
goto free_mem;
}
d_drop(dentry); /* FID - will this also clunk? */
free_mem:
kfree(fcall);
return retval;
}
/**
* v9fs_vfs_symlink - helper function to create symlinks
* @dir: directory inode containing symlink
* @dentry: dentry for symlink
* @symname: symlink data
*
* See 9P2000.u RFC for more information
*
*/
static int
v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
symname);
return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
}
/**
* v9fs_vfs_link - create a hardlink
* @old_dentry: dentry for file to link to
@ -1165,66 +1061,24 @@ static int
v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int retval = -EPERM;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
struct v9fs_fid *newfid = NULL;
char *symname = __getname();
int err;
int retval;
struct v9fs_fid *oldfid;
char *name;
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
old_dentry->d_name.name);
if (!v9ses->extended) {
dprintk(DEBUG_ERROR, "not extended\n");
goto FreeMem;
oldfid = v9fs_fid_lookup(old_dentry);
if (!oldfid) {
dprintk(DEBUG_ERROR, "can't find oldfid\n");
return -EPERM;
}
/* get fid of old_dentry */
sprintf(symname, "hardlink(%d)\n", oldfid->fid);
name = __getname();
sprintf(name, "hardlink(%d)\n", oldfid->fid);
retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
__putname(name);
/* issue a create */
retval = v9fs_create(dir, dentry, V9FS_DMLINK, 0);
if (retval != 0)
goto FreeMem;
newfid = v9fs_fid_lookup(dentry);
if (!newfid) {
dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n");
goto FreeMem;
}
/* issue a twstat */
v9fs_blank_mistat(v9ses, mistat);
strcpy(mistat->data + 1, symname);
mistat->extension = mistat->data + 1;
retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
if (retval < 0) {
dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
FCALL_ERROR(fcall));
goto FreeMem;
}
kfree(fcall);
err = v9fs_t_clunk(v9ses, newfid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %d\n", err);
goto FreeMem;
}
d_drop(dentry); /* FID - will this also clunk? */
kfree(fcall);
fcall = NULL;
FreeMem:
kfree(mistat);
kfree(fcall);
__putname(symname);
return retval;
}
@ -1240,83 +1094,30 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
static int
v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
{
int retval = -EPERM;
struct v9fs_fid *newfid;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
char *symname = __getname();
int err;
int retval;
char *name;
dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
if (!mistat)
return -ENOMEM;
if (!new_valid_dev(rdev)) {
retval = -EINVAL;
goto FreeMem;
}
if (!v9ses->extended) {
dprintk(DEBUG_ERROR, "not extended\n");
goto FreeMem;
}
/* issue a create */
retval = v9fs_create(dir, dentry, mode, 0);
if (retval != 0)
goto FreeMem;
newfid = v9fs_fid_lookup(dentry);
if (!newfid) {
dprintk(DEBUG_ERROR, "coudn't resove fid from dentry\n");
retval = -EINVAL;
goto FreeMem;
}
if (!new_valid_dev(rdev))
return -EINVAL;
name = __getname();
/* build extension */
if (S_ISBLK(mode))
sprintf(symname, "b %u %u", MAJOR(rdev), MINOR(rdev));
sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
else if (S_ISCHR(mode))
sprintf(symname, "c %u %u", MAJOR(rdev), MINOR(rdev));
sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
else if (S_ISFIFO(mode))
; /* DO NOTHING */
*name = 0;
else {
retval = -EINVAL;
goto FreeMem;
__putname(name);
return -EINVAL;
}
if (!S_ISFIFO(mode)) {
/* issue a twstat */
v9fs_blank_mistat(v9ses, mistat);
strcpy(mistat->data + 1, symname);
mistat->extension = mistat->data + 1;
retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
if (retval < 0) {
dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
FCALL_ERROR(fcall));
goto FreeMem;
}
}
/* need to update dcache so we show up */
kfree(fcall);
err = v9fs_t_clunk(v9ses, newfid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %d\n", err);
goto FreeMem;
}
d_drop(dentry); /* FID - will this also clunk? */
FreeMem:
kfree(mistat);
kfree(fcall);
__putname(symname);
retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
__putname(name);
return retval;
}

10
fs/9p/vfs_super.c
View File

@ -44,7 +44,6 @@
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "conv.h"
#include "fid.h"
static void v9fs_clear_inode(struct inode *);
@ -123,10 +122,11 @@ static struct super_block *v9fs_get_sb(struct file_system_type
dprintk(DEBUG_VFS, " \n");
v9ses = kcalloc(1, sizeof(struct v9fs_session_info), GFP_KERNEL);
v9ses = kmalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return ERR_PTR(-ENOMEM);
memset(v9ses, 0, sizeof(struct v9fs_session_info));
if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
dprintk(DEBUG_ERROR, "problem initiating session\n");
kfree(v9ses);
@ -168,10 +168,10 @@ static struct super_block *v9fs_get_sb(struct file_system_type
goto put_back_sb;
}
root_fid->qid = fcall->params.rstat.stat->qid;
root_fid->qid = fcall->params.rstat.stat.qid;
root->d_inode->i_ino =
v9fs_qid2ino(&fcall->params.rstat.stat->qid);
v9fs_mistat2inode(fcall->params.rstat.stat, root->d_inode, sb);
v9fs_qid2ino(&fcall->params.rstat.stat.qid);
v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
}
kfree(fcall);