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-rw-r--r--fs/9p/9p.c314
-rw-r--r--fs/9p/9p.h77
-rw-r--r--fs/9p/Makefile10
-rw-r--r--fs/9p/conv.c884
-rw-r--r--fs/9p/conv.h35
-rw-r--r--fs/9p/debug.h23
-rw-r--r--fs/9p/error.c10
-rw-r--r--fs/9p/error.h2
-rw-r--r--fs/9p/fid.c5
-rw-r--r--fs/9p/mux.c1145
-rw-r--r--fs/9p/mux.h41
-rw-r--r--fs/9p/trans_fd.c53
-rw-r--r--fs/9p/trans_sock.c160
-rw-r--r--fs/9p/transport.h4
-rw-r--r--fs/9p/v9fs.c59
-rw-r--r--fs/9p/v9fs.h17
-rw-r--r--fs/9p/v9fs_vfs.h5
-rw-r--r--fs/9p/vfs_dentry.c15
-rw-r--r--fs/9p/vfs_dir.c47
-rw-r--r--fs/9p/vfs_file.c28
-rw-r--r--fs/9p/vfs_inode.c617
-rw-r--r--fs/9p/vfs_super.c12
22 files changed, 2097 insertions, 1466 deletions
diff --git a/fs/9p/9p.c b/fs/9p/9p.c
index e847f504a47..1a6d08761f3 100644
--- a/fs/9p/9p.c
+++ b/fs/9p/9p.c
@@ -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"
/**
@@ -46,16 +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.params.tversion.msize = msize;
- msg.params.tversion.version = version;
+ tc = v9fs_create_tversion(msize, version);
- return v9fs_mux_rpc(v9ses, &msg, fcall);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -71,19 +78,45 @@ 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, &msg, fcall);
+ 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,
+ struct v9fs_fcall *rc, int err)
+{
+ int fid;
+ struct v9fs_session_info *v9ses;
+
+ if (err)
+ return;
+
+ fid = tc->params.tclunk.fid;
+ kfree(tc);
+
+ if (!rc)
+ return;
+
+ dprintk(DEBUG_9P, "tcall id %d rcall id %d\n", tc->id, rc->id);
+ v9ses = a;
+ if (rc->id == RCLUNK)
+ v9fs_put_idpool(fid, &v9ses->fidpool);
+
+ kfree(rc);
}
/**
@@ -95,16 +128,25 @@ v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
*/
int
-v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_fcall **fcall)
+v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc, *rc;
dprintk(DEBUG_9P, "fid %d\n", fid);
- msg.id = TCLUNK;
- msg.params.tclunk.fid = fid;
- return v9fs_mux_rpc(v9ses, &msg, fcall);
+ rc = NULL;
+ tc = v9fs_create_tclunk(fid);
+ if (!IS_ERR(tc))
+ ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
+ else
+ ret = PTR_ERR(tc);
+
+ if (ret)
+ dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
+
+ v9fs_t_clunk_cb(v9ses, tc, rc, ret);
+ return ret;
}
/**
@@ -114,14 +156,21 @@ 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", oldtag);
+
+ tc = v9fs_create_tflush(oldtag);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
- dprintk(DEBUG_9P, "oldtag %d\n", tag);
- msg.id = TFLUSH;
- msg.params.tflush.oldtag = tag;
- return v9fs_mux_rpc(v9ses, &msg, NULL);
+ return ret;
}
/**
@@ -133,17 +182,22 @@ 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, &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;
}
/**
@@ -157,16 +211,21 @@ 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\n", fid);
- 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;
+ 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 v9fs_mux_rpc(v9ses, &msg, fcall);
+ return ret;
}
/**
@@ -183,23 +242,27 @@ 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;
- }
-
- return v9fs_mux_rpc(v9ses, &msg, fcall);
+
+ if (name)
+ nwname = 1;
+ else
+ nwname = 0;
+
+ 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;
}
/**
@@ -214,19 +277,21 @@ 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;
- long 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, &msg, fcall);
+ 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;
}
/**
@@ -239,14 +304,21 @@ 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, &msg, fcall);
+
+ 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;
}
/**
@@ -262,20 +334,22 @@ 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;
+ 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, &msg, fcall);
+ return ret;
}
/**
@@ -290,31 +364,29 @@ 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;
-
- 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, &msg, &rc);
-
- if (!errorno) {
- errorno = rc->params.rread.count;
- dump_data(rc->params.rread.data, rc->params.rread.count);
- }
-
- if (fcall)
- *fcall = rc;
- else
- kfree(rc);
-
- return errorno;
+ int ret;
+ struct v9fs_fcall *tc, *rc;
+
+ dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
+ (long long unsigned) offset, count);
+
+ 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);
+
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -328,32 +400,30 @@ 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;
+ 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, &msg, &rc);
+ if (!ret)
+ ret = rc->params.rwrite.count;
+ if (rcp)
+ *rcp = rc;
+ else
+ kfree(rc);
- if (!errorno)
- errorno = rc->params.rwrite.count;
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
- if (fcall)
- *fcall = rc;
- else
- kfree(rc);
-
- return errorno;
+ return ret;
}
+
diff --git a/fs/9p/9p.h b/fs/9p/9p.h
index f55424216be..0cd374d9471 100644
--- a/fs/9p/9p.h
+++ b/fs/9p/9p.h
@@ -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>
*
@@ -100,9 +101,18 @@ enum {
V9FS_QTFILE = 0x00,
};
+#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;
@@ -120,6 +130,29 @@ struct v9fs_stat {
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;
+ struct v9fs_qid qid;
+ u32 mode;
+ u32 atime;
+ u32 mtime;
+ u64 length;
char *name;
char *uid;
char *gid;
@@ -128,25 +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 {
@@ -154,12 +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 {
@@ -168,8 +200,8 @@ struct Rflush {
struct Tattach {
u32 fid;
u32 afid;
- char *uname;
- char *aname;
+ struct v9fs_str uname;
+ struct v9fs_str aname;
};
struct Rattach {
@@ -179,13 +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 {
@@ -200,7 +232,7 @@ struct Ropen {
struct Tcreate {
u32 fid;
- char *name;
+ struct v9fs_str name;
u32 perm;
u8 mode;
};
@@ -251,12 +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 {
@@ -271,6 +303,7 @@ struct v9fs_fcall {
u32 size;
u8 id;
u16 tag;
+ void *sdata;
union {
struct Tversion tversion;
@@ -303,7 +336,9 @@ struct v9fs_fcall {
} params;
};
-#define FCALL_ERROR(fcall) (fcall ? fcall->params.rerror.error : "")
+#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:"");
int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
char *version, struct v9fs_fcall **rcall);
@@ -311,8 +346,7 @@ int 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 **rcall);
-int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_fcall **rcall);
+int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid);
int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag);
@@ -320,7 +354,7 @@ 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);
@@ -338,4 +372,5 @@ 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);
diff --git a/fs/9p/Makefile b/fs/9p/Makefile
index e4e4ffe5a7d..3d023089707 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -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
diff --git a/fs/9p/conv.c b/fs/9p/conv.c
index 18121af99d3..55ccfa10ee9 100644
--- a/fs/9p/conv.c
+++ b/fs/9p/conv.c
@@ -30,7 +30,7 @@
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/idr.h>
-
+#include <asm/uaccess.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
@@ -58,12 +58,15 @@ static inline int buf_check_overflow(struct cbuf *buf)
static inline int buf_check_size(struct cbuf *buf, int len)
{
- if (buf->p+len > buf->ep) {
+ if (buf->p + len > buf->ep) {
if (buf->p < buf->ep) {
- eprintk(KERN_ERR, "buffer overflow\n");
+ eprintk(KERN_ERR, "buffer overflow: want %d has %d\n",
+ len, (int)(buf->ep - buf->p));
+ dump_stack();
buf->p = buf->ep + 1;
- return 0;
}
+
+ return 0;
}
return 1;
@@ -127,14 +130,6 @@ static inline void buf_put_string(struct cbuf *buf, const char *s)
buf_put_stringn(buf, s, strlen(s));
}
-static inline void buf_put_data(struct cbuf *buf, void *data, u32 datalen)
-{
- if (buf_check_size(buf, datalen)) {
- memcpy(buf->p, data, datalen);
- buf->p += datalen;
- }
-}
-
static inline u8 buf_get_int8(struct cbuf *buf)
{
u8 ret = 0;
@@ -183,86 +178,37 @@ static inline u64 buf_get_int64(struct cbuf *buf)
return ret;
}
-static inline int
-buf_get_string(struct cbuf *buf, char *data, unsigned int datalen)
-{
- u16 len = 0;
-
- len = buf_get_int16(buf);
- if (!buf_check_overflow(buf) && buf_check_size(buf, len) && len+1>datalen) {
- memcpy(data, buf->p, len);
- data[len] = 0;
- buf->p += len;
- len++;
- }
-
- return len;
-}
-
-static inline char *buf_get_stringb(struct cbuf *buf, struct cbuf *sbuf)
-{
- char *ret;
- u16 len;
-
- ret = NULL;
- len = buf_get_int16(buf);
-
- if (!buf_check_overflow(buf) && buf_check_size(buf, len) &&
- buf_check_size(sbuf, len+1)) {
-
- memcpy(sbuf->p, buf->p, len);
- sbuf->p[len] = 0;
- ret = sbuf->p;
- buf->p += len;
- sbuf->p += len + 1;
- }
-
- return ret;
-}
-
-static inline int buf_get_data(struct cbuf *buf, void *data, int datalen)
+static inline void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr)
{
- int ret = 0;
-
- if (buf_check_size(buf, datalen)) {
- memcpy(data, buf->p, datalen);
- buf->p += datalen;
- ret = datalen;
+ vstr->len = buf_get_int16(buf);
+ if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) {
+ vstr->str = buf->p;
+ buf->p += vstr->len;
+ } else {
+ vstr->len = 0;
+ vstr->str = NULL;
}
-
- return ret;
}
-static inline void *buf_get_datab(struct cbuf *buf, struct cbuf *dbuf,
- int datalen)
+static inline void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid)
{
- char *ret = NULL;
- int n = 0;
-
- if (buf_check_size(dbuf, datalen)) {
- n = buf_get_data(buf, dbuf->p, datalen);
- if (n > 0) {
- ret = dbuf->p;
- dbuf->p += n;
- }
- }
-
- return ret;
+ qid->type = buf_get_int8(bufp);
+ qid->version = buf_get_int32(bufp);
+ qid->path = buf_get_int64(bufp);
}
/**
- * v9fs_size_stat - calculate the size of a variable length stat struct
- * @v9ses: session information
+ * v9fs_size_wstat - calculate the size of a variable length stat struct
* @stat: metadata (stat) structure
+ * @extended: non-zero if 9P2000.u
*
*/
-static int v9fs_size_stat(struct v9fs_session_info *v9ses,
- struct v9fs_stat *stat)
+static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended)
{
int size = 0;
- if (stat == NULL) {
+ if (wstat == NULL) {
eprintk(KERN_ERR, "v9fs_size_stat: got a NULL stat pointer\n");
return 0;
}
@@ -279,82 +225,38 @@ static int v9fs_size_stat(struct v9fs_session_info *v9ses,
8 + /* length[8] */
8; /* minimum sum of string lengths */
- if (stat->name)
- size += strlen(stat->name);
- if (stat->uid)
- size += strlen(stat->uid);
- if (stat->gid)
- size += strlen(stat->gid);
- if (stat->muid)
- size += strlen(stat->muid);
+ if (wstat->name)
+ size += strlen(wstat->name);
+ if (wstat->uid)
+ size += strlen(wstat->uid);
+ if (wstat->gid)
+ size += strlen(wstat->gid);
+ if (wstat->muid)
+ size += strlen(wstat->muid);
- if (v9ses->extended) {
+ if (extended) {
size += 4 + /* n_uid[4] */
4 + /* n_gid[4] */
4 + /* n_muid[4] */
2; /* string length of extension[4] */
- if (stat->extension)
- size += strlen(stat->extension);
+ if (wstat->extension)
+ size += strlen(wstat->extension);
}
return size;
}
/**
- * serialize_stat - safely format a stat structure for transmission
- * @v9ses: session info
- * @stat: metadata (stat) structure
- * @bufp: buffer to serialize structure into
- *
- */
-
-static int
-serialize_stat(struct v9fs_session_info *v9ses, struct v9fs_stat *stat,
- struct cbuf *bufp)
-{
- buf_put_int16(bufp, stat->size);
- buf_put_int16(bufp, stat->type);
- buf_put_int32(bufp, stat->dev);
- buf_put_int8(bufp, stat->qid.type);
- buf_put_int32(bufp, stat->qid.version);
- buf_put_int64(bufp, stat->qid.path);
- buf_put_int32(bufp, stat->mode);
- buf_put_int32(bufp, stat->atime);
- buf_put_int32(bufp, stat->mtime);
- buf_put_int64(bufp, stat->length);
-
- buf_put_string(bufp, stat->name);
- buf_put_string(bufp, stat->uid);
- buf_put_string(bufp, stat->gid);
- buf_put_string(bufp, stat->muid);
-
- if (v9ses->extended) {
- buf_put_string(bufp, stat->extension);
- buf_put_int32(bufp, stat->n_uid);
- buf_put_int32(bufp, stat->n_gid);
- buf_put_int32(bufp, stat->n_muid);
- }
-
- if (buf_check_overflow(bufp))
- return 0;
-
- return stat->size;
-}
-
-/**
- * deserialize_stat - safely decode a recieved metadata (stat) structure
- * @v9ses: session info
+ * buf_get_stat - safely decode a recieved metadata (stat) structure
* @bufp: buffer to deserialize
* @stat: metadata (stat) structure
- * @dbufp: buffer to deserialize variable strings into
+ * @extended: non-zero if 9P2000.u
*
*/
-static inline int
-deserialize_stat(struct v9fs_session_info *v9ses, struct cbuf *bufp,
- struct v9fs_stat *stat, struct cbuf *dbufp)
+static inline void
+buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended)
{
-
stat->size = buf_get_int16(bufp);
stat->type = buf_get_int16(bufp);
stat->dev = buf_get_int32(bufp);
@@ -365,282 +267,82 @@ deserialize_stat(struct v9fs_session_info *v9ses, struct cbuf *bufp,
stat->atime = buf_get_int32(bufp);
stat->mtime = buf_get_int32(bufp);
stat->length = buf_get_int64(bufp);
- stat->name = buf_get_stringb(bufp, dbufp);
- stat->uid = buf_get_stringb(bufp, dbufp);
- stat->gid = buf_get_stringb(bufp, dbufp);
- stat->muid = buf_get_stringb(bufp, dbufp);
+ buf_get_str(bufp, &stat->name);
+ buf_get_str(bufp, &stat->uid);
+ buf_get_str(bufp, &stat->gid);
+ buf_get_str(bufp, &stat->muid);
- if (v9ses->extended) {
- stat->extension = buf_get_stringb(bufp, dbufp);
+ if (extended) {
+ buf_get_str(bufp, &stat->extension);
stat->n_uid = buf_get_int32(bufp);
stat->n_gid = buf_get_int32(bufp);
stat->n_muid = buf_get_int32(bufp);
}
-
- if (buf_check_overflow(bufp) || buf_check_overflow(dbufp))
- return 0;
-
- return stat->size + 2;
-}
-
-/**
- * deserialize_statb - wrapper for decoding a received metadata structure
- * @v9ses: session info
- * @bufp: buffer to deserialize
- * @dbufp: buffer to deserialize variable strings into
- *
- */
-
-static inline struct v9fs_stat *deserialize_statb(struct v9fs_session_info
- *v9ses, struct cbuf *bufp,
- struct cbuf *dbufp)
-{
- struct v9fs_stat *ret = buf_alloc(dbufp, sizeof(struct v9fs_stat));
-
- if (ret) {
- int n = deserialize_stat(v9ses, bufp, ret, dbufp);
- if (n <= 0)
- return NULL;
- }
-
- return ret;
}
/**
* v9fs_deserialize_stat - decode a received metadata structure
- * @v9ses: session info
* @buf: buffer to deserialize
* @buflen: length of received buffer
* @stat: metadata structure to decode into
- * @statlen: length of destination metadata structure
+ * @extended: non-zero if 9P2000.u
*
+ * Note: stat will point to the buf region.
*/
int
-v9fs_deserialize_stat(struct v9fs_session_info *v9ses, void *buf,
- u32 buflen, struct v9fs_stat *stat, u32 statlen)
+v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
+ int extended)
{
struct cbuf buffer;
struct cbuf *bufp = &buffer;
- struct cbuf dbuffer;
- struct cbuf *dbufp = &dbuffer;
+ unsigned char *p;
buf_init(bufp, buf, buflen);
- buf_init(dbufp, (char *)stat + sizeof(struct v9fs_stat),
- statlen - sizeof(struct v9fs_stat));
-
- return deserialize_stat(v9ses, bufp, stat, dbufp);
-}
-
-static inline int
-v9fs_size_fcall(struct v9fs_session_info *v9ses, struct v9fs_fcall *fcall)
-{
- int size = 4 + 1 + 2; /* size[4] msg[1] tag[2] */
- int i = 0;
-
- switch (fcall->id) {
- default:
- eprintk(KERN_ERR, "bad msg type %d\n", fcall->id);
- return 0;
- case TVERSION: /* msize[4] version[s] */
- size += 4 + 2 + strlen(fcall->params.tversion.version);
- break;
- case TAUTH: /* afid[4] uname[s] aname[s] */
- size += 4 + 2 + strlen(fcall->params.tauth.uname) +
- 2 + strlen(fcall->params.tauth.aname);
- break;
- case TFLUSH: /* oldtag[2] */
- size += 2;
- break;
- case TATTACH: /* fid[4] afid[4] uname[s] aname[s] */
- size += 4 + 4 + 2 + strlen(fcall->params.tattach.uname) +
- 2 + strlen(fcall->params.tattach.aname);
- break;
- case TWALK: /* fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
- size += 4 + 4 + 2;
- /* now compute total for the array of names */
- for (i = 0; i < fcall->params.twalk.nwname; i++)
- size += 2 + strlen(fcall->params.twalk.wnames[i]);
- break;
- case TOPEN: /* fid[4] mode[1] */
- size += 4 + 1;
- break;
- case TCREATE: /* fid[4] name[s] perm[4] mode[1] */
- size += 4 + 2 + strlen(fcall->params.tcreate.name) + 4 + 1;
- break;
- case TREAD: /* fid[4] offset[8] count[4] */
- size += 4 + 8 + 4;
- break;
- case TWRITE: /* fid[4] offset[8] count[4] data[count] */
- size += 4 + 8 + 4 + fcall->params.twrite.count;
- break;
- case TCLUNK: /* fid[4] */
- size += 4;
- break;
- case TREMOVE: /* fid[4] */
- size += 4;
- break;
- case TSTAT: /* fid[4] */
- size += 4;
- break;
- case TWSTAT: /* fid[4] stat[n] */
- fcall->params.twstat.stat->size =
- v9fs_size_stat(v9ses, fcall->params.twstat.stat);
- size += 4 + 2 + 2 + fcall->params.twstat.stat->size;
- }
- return size;
-}
-
-/*
- * v9fs_serialize_fcall - marshall fcall struct into a packet
- * @v9ses: session information
- * @fcall: structure to convert
- * @data: buffer to serialize fcall into
- * @datalen: length of buffer to serialize fcall into
- *
- */
-
-int
-v9fs_serialize_fcall(struct v9fs_session_info *v9ses, struct v9fs_fcall *fcall,
- void *data, u32 datalen)
-{
- int i = 0;
- struct v9fs_stat *stat = NULL;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- buf_init(bufp, data, datalen);
-
- if (!fcall) {
- eprintk(KERN_ERR, "no fcall\n");
- return -EINVAL;
- }
-
- fcall->size = v9fs_size_fcall(v9ses, fcall);
-
- buf_put_int32(bufp, fcall->size);
- buf_put_int8(bufp, fcall->id);
- buf_put_int16(bufp, fcall->tag);
-
- dprintk(DEBUG_CONV, "size %d id %d tag %d\n", fcall->size, fcall->id,
- fcall->tag);
-
- /* now encode it */
- switch (fcall->id) {
- default:
- eprintk(KERN_ERR, "bad msg type: %d\n", fcall->id);
- return -EPROTO;
- case TVERSION:
- buf_put_int32(bufp, fcall->params.tversion.msize);
- buf_put_string(bufp, fcall->params.tversion.version);
- break;
- case TAUTH:
- buf_put_int32(bufp, fcall->params.tauth.afid);
- buf_put_string(bufp, fcall->params.tauth.uname);
- buf_put_string(bufp, fcall->params.tauth.aname);
- break;
- case TFLUSH:
- buf_put_int16(bufp, fcall->params.tflush.oldtag);
- break;
- case TATTACH:
- buf_put_int32(bufp, fcall->params.tattach.fid);
- buf_put_int32(bufp, fcall->params.tattach.afid);
- buf_put_string(bufp, fcall->params.tattach.uname);
- buf_put_string(bufp, fcall->params.tattach.aname);
- break;
- case TWALK:
- buf_put_int32(bufp, fcall->params.twalk.fid);
- buf_put_int32(bufp, fcall->params.twalk.newfid);
- buf_put_int16(bufp, fcall->params.twalk.nwname);
- for (i = 0; i < fcall->params.twalk.nwname; i++)
- buf_put_string(bufp, fcall->params.twalk.wnames[i]);
- break;
- case TOPEN:
- buf_put_int32(bufp, fcall->params.topen.fid);
- buf_put_int8(bufp, fcall->params.topen.mode);
- break;
- case TCREATE:
- buf_put_int32(bufp, fcall->params.tcreate.fid);
- buf_put_string(bufp, fcall->params.tcreate.name);
- buf_put_int32(bufp, fcall->params.tcreate.perm);
- buf_put_int8(bufp, fcall->params.tcreate.mode);
- break;
- case TREAD:
- buf_put_int32(bufp, fcall->params.tread.fid);
- buf_put_int64(bufp, fcall->params.tread.offset);
- buf_put_int32(bufp, fcall->params.tread.count);
- break;
- case TWRITE:
- buf_put_int32(bufp, fcall->params.twrite.fid);
- buf_put_int64(bufp, fcall->params.twrite.offset);
- buf_put_int32(bufp, fcall->params.twrite.count);
- buf_put_data(bufp, fcall->params.twrite.data,
- fcall->params.twrite.count);
- break;
- case TCLUNK:
- buf_put_int32(bufp, fcall->params.tclunk.fid);
- break;
- case TREMOVE:
- buf_put_int32(bufp, fcall->params.tremove.fid);
- break;
- case TSTAT:
- buf_put_int32(bufp, fcall->params.tstat.fid);
- break;
- case TWSTAT:
- buf_put_int32(bufp, fcall->params.twstat.fid);
- stat = fcall->params.twstat.stat;
-
- buf_put_int16(bufp, stat->size + 2);
- serialize_stat(v9ses, stat, bufp);
- break;
- }
+ p = bufp->p;
+ buf_get_stat(bufp, stat, extended);
if (buf_check_overflow(bufp))
- return -EIO;
-
- return fcall->size;
+ return 0;
+ else
+ return bufp->p - p;
}
/**
* deserialize_fcall - unmarshal a response
- * @v9ses: session information
- * @msgsize: size of rcall message
* @buf: recieved buffer
* @buflen: length of received buffer
* @rcall: fcall structure to populate
* @rcalllen: length of fcall structure to populate
+ * @extended: non-zero if 9P2000.u
*
*/
int
-v9fs_deserialize_fcall(struct v9fs_session_info *v9ses, u32 msgsize,
- void *buf, u32 buflen, struct v9fs_fcall *rcall,
- int rcalllen)
+v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
+ int extended)
{
struct cbuf buffer;
struct cbuf *bufp = &buffer;
- struct cbuf dbuffer;
- struct cbuf *dbufp = &dbuffer;
int i = 0;
buf_init(bufp, buf, buflen);
- buf_init(dbufp, (char *)rcall + sizeof(struct v9fs_fcall),
- rcalllen - sizeof(struct v9fs_fcall));
- rcall->size = msgsize;
+ rcall->size = buf_get_int32(bufp);
rcall->id = buf_get_int8(bufp);
rcall->tag = buf_get_int16(bufp);
dprintk(DEBUG_CONV, "size %d id %d tag %d\n", rcall->size, rcall->id,
rcall->tag);
+
switch (rcall->id) {
default:
eprintk(KERN_ERR, "unknown message type: %d\n", rcall->id);
return -EPROTO;
case RVERSION:
rcall->params.rversion.msize = buf_get_int32(bufp);
- rcall->params.rversion.version = buf_get_stringb(bufp, dbufp);
+ buf_get_str(bufp, &rcall->params.rversion.version);
break;
case RFLUSH:
break;
@@ -651,34 +353,27 @@ v9fs_deserialize_fcall(struct v9fs_session_info *v9ses, u32 msgsize,
break;
case RWALK:
rcall->params.rwalk.nwqid = buf_get_int16(bufp);
- rcall->params.rwalk.wqids = buf_alloc(dbufp,
- rcall->params.rwalk.nwqid * sizeof(struct v9fs_qid));
- if (rcall->params.rwalk.wqids)
- for (i = 0; i < rcall->params.rwalk.nwqid; i++) {
- rcall->params.rwalk.wqids[i].type =
- buf_get_int8(bufp);
- rcall->params.rwalk.wqids[i].version =
- buf_get_int16(bufp);
- rcall->params.rwalk.wqids[i].path =
- buf_get_int64(bufp);
- }
+ if (rcall->params.rwalk.nwqid > V9FS_MAXWELEM) {
+ eprintk(KERN_ERR, "Rwalk with more than %d qids: %d\n",
+ V9FS_MAXWELEM, rcall->params.rwalk.nwqid);
+ return -EPROTO;
+ }
+
+ for (i = 0; i < rcall->params.rwalk.nwqid; i++)
+ buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]);
break;
case ROPEN:
- rcall->params.ropen.qid.type = buf_get_int8(bufp);
- rcall->params.ropen.qid.version = buf_get_int32(bufp);
- rcall->params.ropen.qid.path = buf_get_int64(bufp);
+ buf_get_qid(bufp, &rcall->params.ropen.qid);
rcall->params.ropen.iounit = buf_get_int32(bufp);
break;
case RCREATE:
- rcall->params.rcreate.qid.type = buf_get_int8(bufp);
- rcall->params.rcreate.qid.version = buf_get_int32(bufp);
- rcall->params.rcreate.qid.path = buf_get_int64(bufp);
+ buf_get_qid(bufp, &rcall->params.rcreate.qid);
rcall->params.rcreate.iounit = buf_get_int32(bufp);
break;
case RREAD:
rcall->params.rread.count = buf_get_int32(bufp);
- rcall->params.rread.data = buf_get_datab(bufp, dbufp,
- rcall->params.rread.count);
+ rcall->params.rread.data = bufp->p;
+ buf_check_size(bufp, rcall->params.rread.count);
break;
case RWRITE:
rcall->params.rwrite.count = buf_get_int32(bufp);
@@ -689,20 +384,443 @@ v9fs_deserialize_fcall(struct v9fs_session_info *v9ses, u32 msgsize,
break;
case RSTAT:
buf_get_int16(bufp);
- rcall->params.rstat.stat =
- deserialize_statb(v9ses, bufp, dbufp);
+ buf_get_stat(bufp, &rcall->params.rstat.stat, extended);
break;
case RWSTAT:
break;
case RERROR:
- rcall->params.rerror.error = buf_get_stringb(bufp, dbufp);
- if (v9ses->extended)
+ buf_get_str(bufp, &rcall->params.rerror.error);
+ if (extended)
rcall->params.rerror.errno = buf_get_int16(bufp);
break;
}
- if (buf_check_overflow(bufp) || buf_check_overflow(dbufp))
+ if (buf_check_overflow(bufp)) {
+ dprintk(DEBUG_ERROR, "buffer overflow\n");
return -EIO;
+ }
+
+ return bufp->p - bufp->sp;
+}
+
+static inline void v9fs_put_int8(struct cbuf *bufp, u8 val, u8 * p)
+{
+ *p = val;
+ buf_put_int8(bufp, val);
+}
+
+static inline void v9fs_put_int16(struct cbuf *bufp, u16 val, u16 * p)
+{
+ *p = val;
+ buf_put_int16(bufp, val);
+}
+
+static inline void v9fs_put_int32(struct cbuf *bufp, u32 val, u32 * p)
+{
+ *p = val;
+ buf_put_int32(bufp, val);
+}
+
+static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p)
+{
+ *p = val;
+ buf_put_int64(bufp, val);
+}
- return rcall->size;
+static inline void
+v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
+{
+ if (data) {
+ str->len = strlen(data);
+ str->str = bufp->p;
+ } else {
+ str->len = 0;
+ str->str = NULL;
+ }
+
+ buf_put_stringn(bufp, data, str->len);
+}
+
+static inline int
+v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count,
+ unsigned char **pdata)
+{
+ *pdata = buf_alloc(bufp, count);
+ return copy_from_user(*pdata, data, count);
+}
+
+static void
+v9fs_put_wstat(struct cbuf *bufp, struct v9fs_wstat *wstat,
+ struct v9fs_stat *stat, int statsz, int extended)
+{
+ v9fs_put_int16(bufp, statsz, &stat->size);
+ v9fs_put_int16(bufp, wstat->type, &stat->type);
+ v9fs_put_int32(bufp, wstat->dev, &stat->dev);
+ v9fs_put_int8(bufp, wstat->qid.type, &stat->qid.type);
+ v9fs_put_int32(bufp, wstat->qid.version, &stat->qid.version);
+ v9fs_put_int64(bufp, wstat->qid.path, &stat->qid.path);
+ v9fs_put_int32(bufp, wstat->mode, &stat->mode);
+ v9fs_put_int32(bufp, wstat->atime, &stat->atime);
+ v9fs_put_int32(bufp, wstat->mtime, &stat->mtime);
+ v9fs_put_int64(bufp, wstat->length, &stat->length);
+
+ v9fs_put_str(bufp, wstat->name, &stat->name);
+ v9fs_put_str(bufp, wstat->uid, &stat->uid);
+ v9fs_put_str(bufp, wstat->gid, &stat->gid);
+ v9fs_put_str(bufp, wstat->muid, &stat->muid);
+
+ if (extended) {
+ v9fs_put_str(bufp, wstat->extension, &stat->extension);
+ v9fs_put_int32(bufp, wstat->n_uid, &stat->n_uid);
+ v9fs_put_int32(bufp, wstat->n_gid, &stat->n_gid);
+ v9fs_put_int32(bufp, wstat->n_muid, &stat->n_muid);
+ }
+}
+
+static struct v9fs_fcall *
+v9fs_create_common(struct cbuf *bufp, u32 size, u8 id)
+{
+ struct v9fs_fcall *fc;
+
+ size += 4 + 1 + 2; /* size[4] id[1] tag[2] */
+ fc = kmalloc(sizeof(struct v9fs_fcall) + size, GFP_KERNEL);
+ if (!fc)
+ return ERR_PTR(-ENOMEM);
+
+ fc->sdata = (char *)fc + sizeof(*fc);
+
+ buf_init(bufp, (char *)fc->sdata, size);
+ v9fs_put_int32(bufp, size, &fc->size);
+ v9fs_put_int8(bufp, id, &fc->id);
+ v9fs_put_int16(bufp, V9FS_NOTAG, &fc->tag);
+
+ return fc;
+}
+
+void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag)
+{
+ fc->tag = tag;
+ *(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag);
+}
+
+struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 2 + strlen(version); /* msize[4] version[s] */
+ fc = v9fs_create_common(bufp, size, TVERSION);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, msize, &fc->params.tversion.msize);
+ v9fs_put_str(bufp, version, &fc->params.tversion.version);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 2 + strlen(uname) + 2 + strlen(aname); /* afid[4] uname[s] aname[s] */
+ fc = v9fs_create_common(bufp, size, TAUTH);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, afid, &fc->params.tauth.afid);
+ v9fs_put_str(bufp, uname, &fc->params.tauth.uname);
+ v9fs_put_str(bufp, aname, &fc->params.tauth.aname);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *
+v9fs_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname); /* fid[4] afid[4] uname[s] aname[s] */
+ fc = v9fs_create_common(bufp, size, TATTACH);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tattach.fid);
+ v9fs_put_int32(bufp, afid, &fc->params.tattach.afid);
+ v9fs_put_str(bufp, uname, &fc->params.tattach.uname);
+ v9fs_put_str(bufp, aname, &fc->params.tattach.aname);
+
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tflush(u16 oldtag)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 2; /* oldtag[2] */
+ fc = v9fs_create_common(bufp, size, TFLUSH);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
+ char **wnames)
+{
+ int i, size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ if (nwname > V9FS_MAXWELEM) {
+ dprintk(DEBUG_ERROR, "nwname > %d\n", V9FS_MAXWELEM);
+ return NULL;
+ }
+
+ size = 4 + 4 + 2; /* fid[4] newfid[4] nwname[2] ... */
+ for (i = 0; i < nwname; i++) {
+ size += 2 + strlen(wnames[i]); /* wname[s] */
+ }
+
+ fc = v9fs_create_common(bufp, size, TWALK);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.twalk.fid);
+ v9fs_put_int32(bufp, newfid, &fc->params.twalk.newfid);
+ v9fs_put_int16(bufp, nwname, &fc->params.twalk.nwname);
+ for (i = 0; i < nwname; i++) {
+ v9fs_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 1; /* fid[4] mode[1] */
+ fc = v9fs_create_common(bufp, size, TOPEN);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.topen.fid);
+ v9fs_put_int8(bufp, mode, &fc->params.topen.mode);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 2 + strlen(name) + 4 + 1; /* fid[4] name[s] perm[4] mode[1] */
+ fc = v9fs_create_common(bufp, size, TCREATE);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tcreate.fid);
+ v9fs_put_str(bufp, name, &fc->params.tcreate.name);
+ v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm);
+ v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 8 + 4; /* fid[4] offset[8] count[4] */
+ fc = v9fs_create_common(bufp, size, TREAD);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tread.fid);
+ v9fs_put_int64(bufp, offset, &fc->params.tread.offset);
+ v9fs_put_int32(bufp, count, &fc->params.tread.count);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
+ const char __user * data)
+{
+ int size, err;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 8 + 4 + count; /* fid[4] offset[8] count[4] data[count] */
+ fc = v9fs_create_common(bufp, size, TWRITE);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.twrite.fid);
+ v9fs_put_int64(bufp, offset, &fc->params.twrite.offset);
+ v9fs_put_int32(bufp, count, &fc->params.twrite.count);
+ err = v9fs_put_user_data(bufp, data, count, &fc->params.twrite.data);
+ if (err) {
+ kfree(fc);
+ fc = ERR_PTR(err);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tclunk(u32 fid)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4; /* fid[4] */
+ fc = v9fs_create_common(bufp, size, TCLUNK);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tclunk.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tremove(u32 fid)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4; /* fid[4] */
+ fc = v9fs_create_common(bufp, size, TREMOVE);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tremove.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tstat(u32 fid)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4; /* fid[4] */
+ fc = v9fs_create_common(bufp, size, TSTAT);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tstat.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
+ int extended)
+{
+ int size, statsz;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ statsz = v9fs_size_wstat(wstat, extended);
+ size = 4 + 2 + 2 + statsz; /* fid[4] stat[n] */
+ fc = v9fs_create_common(bufp, size, TWSTAT);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.twstat.fid);
+ buf_put_int16(bufp, statsz + 2);
+ v9fs_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, extended);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
}
diff --git a/fs/9p/conv.h b/fs/9p/conv.h
index ee849613c61..26a736e4a2e 100644
--- a/fs/9p/conv.h
+++ b/fs/9p/conv.h
@@ -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>
*
@@ -24,13 +25,27 @@
*
*/
-int v9fs_deserialize_stat(struct v9fs_session_info *, void *buf,
- u32 buflen, struct v9fs_stat *stat, u32 statlen);
-int v9fs_serialize_fcall(struct v9fs_session_info *, struct v9fs_fcall *tcall,
- void *buf, u32 buflen);
-int v9fs_deserialize_fcall(struct v9fs_session_info *, u32 msglen,
- void *buf, u32 buflen, struct v9fs_fcall *rcall,
- int rcalllen);
+int v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
+ int extended);
+int v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
+ 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);
diff --git a/fs/9p/debug.h b/fs/9p/debug.h
index 4445f06919d..fe551032788 100644
--- a/fs/9p/debug.h
+++ b/fs/9p/debug.h
@@ -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)
diff --git a/fs/9p/error.c b/fs/9p/error.c
index 834cb179e38..e4b6f8f38b6 100644
--- a/fs/9p/error.c
+++ b/fs/9p/error.c
@@ -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;
}
diff --git a/fs/9p/error.h b/fs/9p/error.h
index 78f89acf7c9..a9794e85fe5 100644
--- a/fs/9p/error.h
+++ b/fs/9p/error.h
@@ -36,6 +36,7 @@ struct errormap {
char *name;
int val;
+ int namelen;
struct hlist_node list;
};
@@ -175,4 +176,3 @@ static struct errormap errmap[] = {
};
extern int v9fs_error_init(void);
-extern int v9fs_errstr2errno(char *errstr);
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index d95f8626d17..eda449778fa 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -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"
/**
@@ -164,7 +161,7 @@ static struct v9fs_fid *v9fs_fid_walk_up(struct dentry *dentry)
return v9fs_fid_create(dentry, v9ses, fidnum, 0);
clunk_fid:
- v9fs_t_clunk(v9ses, fidnum, NULL);
+ v9fs_t_clunk(v9ses, fidnum);
return ERR_PTR(err);
}
diff --git a/fs/9p/mux.c b/fs/9p/mux.c
index 8835b576f74..945cb368d45 100644
--- a/fs/9p/mux.c
+++ b/fs/9p/mux.c
@@ -4,7 +4,7 @@
* Protocol Multiplexer
*
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -28,448 +28,943 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
+#include <linux/poll.h>
#include <linux/kthread.h>
#include <linux/idr.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
-#include "transport.h"
#include "conv.h"
+#include "transport.h"
#include "mux.h"
+#define ERREQFLUSH 1
+#define SCHED_TIMEOUT 10
+#define MAXPOLLWADDR 2
+
+enum {
+ Rworksched = 1, /* read work scheduled or running */
+ Rpending = 2, /* can read */
+ Wworksched = 4, /* write work scheduled or running */
+ Wpending = 8, /* can write */
+};
+
+struct v9fs_mux_poll_task;
+
+struct v9fs_req {
+ int tag;
+ struct v9fs_fcall *tcall;
+ struct v9fs_fcall *rcall;
+ int err;
+ v9fs_mux_req_callback cb;
+ void *cba;
+ struct list_head req_list;
+};
+
+struct v9fs_mux_data {
+ spinlock_t lock;
+ struct list_head mux_list;
+ struct v9fs_mux_poll_task *poll_task;
+ int msize;
+ unsigned char *extended;
+ struct v9fs_transport *trans;
+ struct v9fs_idpool tidpool;
+ int err;
+ 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;
+ int wsize;
+ char *wbuf;
+ wait_queue_t poll_wait[MAXPOLLWADDR];
+ wait_queue_head_t *poll_waddr[MAXPOLLWADDR];
+ poll_table pt;
+ struct work_struct rq;
+ struct work_struct wq;
+ unsigned long wsched;
+};
+
+struct v9fs_mux_poll_task {
+ struct task_struct *task;
+ struct list_head mux_list;
+ int muxnum;
+};
+
+struct v9fs_mux_rpc {
+ struct v9fs_mux_data *m;
+ struct v9fs_req *req;
+ int err;
+ struct v9fs_fcall *rcall;
+ wait_queue_head_t wqueue;
+};
+
+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;
+
+static int v9fs_mux_num;
+static int v9fs_mux_poll_task_num;
+static struct v9fs_mux_poll_task v9fs_mux_poll_tasks[100];
+
+int v9fs_mux_global_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++)
+ v9fs_mux_poll_tasks[i].task = NULL;
+
+ v9fs_mux_wq = create_workqueue("v9fs");
+ if (!v9fs_mux_wq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void v9fs_mux_global_exit(void)
+{
+ destroy_workqueue(v9fs_mux_wq);
+}
+
/**
- * dprintcond - print condition of session info
- * @v9ses: session info structure
- * @req: RPC request structure
+ * v9fs_mux_calc_poll_procs - calculates the number of polling procs
+ * based on the number of mounted v9fs filesystems.
*
+ * The current implementation returns sqrt of the number of mounts.
*/
+inline int v9fs_mux_calc_poll_procs(int muxnum)
+{
+ int n;
+
+ if (v9fs_mux_poll_task_num)
+ n = muxnum / v9fs_mux_poll_task_num +
+ (muxnum % v9fs_mux_poll_task_num ? 1 : 0);
+ else
+ n = 1;
+
+ if (n > ARRAY_SIZE(v9fs_mux_poll_tasks))
+ n = ARRAY_SIZE(v9fs_mux_poll_tasks);
+
+ return n;
+}
-static inline int
-dprintcond(struct v9fs_session_info *v9ses, struct v9fs_rpcreq *req)
+static int v9fs_mux_poll_start(struct v9fs_mux_data *m)
{
- dprintk(DEBUG_MUX, "condition: %d, %p\n", v9ses->transport->status,
- req->rcall);
+ int i, n;
+ struct v9fs_mux_poll_task *vpt, *vptlast;
+ struct task_struct *pproc;
+
+ dprintk(DEBUG_MUX, "mux %p muxnum %d procnum %d\n", m, v9fs_mux_num,
+ v9fs_mux_poll_task_num);
+ up(&v9fs_mux_task_lock);
+
+ n = v9fs_mux_calc_poll_procs(v9fs_mux_num + 1);
+ if (n > v9fs_mux_poll_task_num) {
+ for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) {
+ if (v9fs_mux_poll_tasks[i].task == NULL) {
+ vpt = &v9fs_mux_poll_tasks[i];
+ dprintk(DEBUG_MUX, "create proc %p\n", vpt);
+ pproc = kthread_create(v9fs_poll_proc, vpt,
+ "v9fs-poll");
+
+ if (!IS_ERR(pproc)) {
+ vpt->task = pproc;
+ INIT_LIST_HEAD(&vpt->mux_list);
+ vpt->muxnum = 0;
+ v9fs_mux_poll_task_num++;
+ wake_up_process(vpt->task);
+ }
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks))
+ dprintk(DEBUG_ERROR, "warning: no free poll slots\n");
+ }
+
+ n = (v9fs_mux_num + 1) / v9fs_mux_poll_task_num +
+ ((v9fs_mux_num + 1) % v9fs_mux_poll_task_num ? 1 : 0);
+
+ vptlast = NULL;
+ for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) {
+ vpt = &v9fs_mux_poll_tasks[i];
+ if (vpt->task != NULL) {
+ vptlast = vpt;
+ if (vpt->muxnum < n) {
+ dprintk(DEBUG_MUX, "put in proc %d\n", i);
+ list_add(&m->mux_list, &vpt->mux_list);
+ vpt->muxnum++;
+ m->poll_task = vpt;
+ memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
+ init_poll_funcptr(&m->pt, v9fs_pollwait);
+ break;
+ }
+ }
+ }
+
+ if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks)) {
+ if (vptlast == NULL)
+ return -ENOMEM;
+
+ dprintk(DEBUG_MUX, "put in proc %d\n", i);
+ list_add(&m->mux_list, &vptlast->mux_list);
+ vptlast->muxnum++;
+ m->poll_task = vptlast;
+ memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
+ init_poll_funcptr(&m->pt, v9fs_pollwait);
+ }
+
+ v9fs_mux_num++;
+ down(&v9fs_mux_task_lock);
+
return 0;
}
+static void v9fs_mux_poll_stop(struct v9fs_mux_data *m)
+{
+ int i;
+ struct v9fs_mux_poll_task *vpt;
+
+ up(&v9fs_mux_task_lock);
+ vpt = m->poll_task;
+ list_del(&m->mux_list);
+ for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
+ if (m->poll_waddr[i] != NULL) {
+ remove_wait_queue(m->poll_waddr[i], &m->poll_wait[i]);
+ m->poll_waddr[i] = NULL;
+ }
+ }
+ vpt->muxnum--;
+ if (!vpt->muxnum) {
+ dprintk(DEBUG_MUX, "destroy proc %p\n", vpt);
+ send_sig(SIGKILL, vpt->task, 1);
+ vpt->task = NULL;
+ v9fs_mux_poll_task_num--;
+ }
+ v9fs_mux_num--;
+ down(&v9fs_mux_task_lock);
+}
+
/**
- * xread - force read of a certain number of bytes
- * @v9ses: session info structure
- * @ptr: pointer to buffer
- * @sz: number of bytes to read
+ * v9fs_mux_init - allocate and initialize the per-session mux data
+ * Creates the polling task if this is the first session.
*
- * Chuck Cranor CS-533 project1
+ * @trans - transport structure
+ * @msize - maximum message size
+ * @extended - pointer to the extended flag
*/
-
-static int xread(struct v9fs_session_info *v9ses, void *ptr, unsigned long sz)
+struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
+ unsigned char *extended)
{
- int rd = 0;
- int ret = 0;
- while (rd < sz) {
- ret = v9ses->transport->read(v9ses->transport, ptr, sz - rd);
- if (ret <= 0) {
- dprintk(DEBUG_ERROR, "xread errno %d\n", ret);
- return ret;
+ int i, n;
+ struct v9fs_mux_data *m, *mtmp;
+
+ dprintk(DEBUG_MUX, "transport %p msize %d\n", trans, msize);
+ m = kmalloc(sizeof(struct v9fs_mux_data), GFP_KERNEL);
+ if (!m)
+ return ERR_PTR(-ENOMEM);
+
+ spin_lock_init(&m->lock);
+ INIT_LIST_HEAD(&m->mux_list);
+ m->msize = msize;
+ m->extended = extended;
+ m->trans = trans;
+ idr_init(&m->tidpool.pool);
+ init_MUTEX(&m->tidpool.lock);
+ m->err = 0;
+ 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 = NULL;
+ m->wpos = m->wsize = 0;
+ m->wbuf = NULL;
+ INIT_WORK(&m->rq, v9fs_read_work, m);
+ INIT_WORK(&m->wq, v9fs_write_work, m);
+ m->wsched = 0;
+ memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
+ m->poll_task = NULL;
+ n = v9fs_mux_poll_start(m);
+ if (n)
+ return ERR_PTR(n);
+
+ n = trans->poll(trans, &m->pt);
+ if (n & POLLIN) {
+ dprintk(DEBUG_MUX, "mux %p can read\n", m);
+ set_bit(Rpending, &m->wsched);
+ }
+
+ if (n & POLLOUT) {
+ dprintk(DEBUG_MUX, "mux %p can write\n", m);
+ set_bit(Wpending, &m->wsched);
+ }
+
+ for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
+ if (IS_ERR(m->poll_waddr[i])) {
+ v9fs_mux_poll_stop(m);
+ mtmp = (void *)m->poll_waddr; /* the error code */
+ kfree(m);
+ m = mtmp;
+ break;
}
- rd += ret;
- ptr += ret;
}
- return (rd);
+
+ return m;
}
/**
- * read_message - read a full 9P2000 fcall packet
- * @v9ses: session info structure
- * @rcall: fcall structure to read into
- * @rcalllen: size of fcall buffer
- *
+ * v9fs_mux_destroy - cancels all pending requests and frees mux resources
*/
+void v9fs_mux_destroy(struct v9fs_mux_data *m)
+{
+ dprintk(DEBUG_MUX, "mux %p prev %p next %p\n", m,
+ m->mux_list.prev, m->mux_list.next);
+ v9fs_mux_cancel(m, -ECONNRESET);
+
+ if (!list_empty(&m->req_list)) {
+ /* wait until all processes waiting on this session exit */
+ dprintk(DEBUG_MUX, "mux %p waiting for empty request queue\n",
+ m);
+ wait_event_timeout(m->equeue, (list_empty(&m->req_list)), 5000);
+ dprintk(DEBUG_MUX, "mux %p request queue empty: %d\n", m,
+ list_empty(&m->req_list));
+ }
+
+ v9fs_mux_poll_stop(m);
+ m->trans = NULL;
+
+ kfree(m);
+}
-static int
-read_message(struct v9fs_session_info *v9ses,
- struct v9fs_fcall *rcall, int rcalllen)
+/**
+ * v9fs_pollwait - called by files poll operation to add v9fs-poll task
+ * to files wait queue
+ */
+static void
+v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address,
+ poll_table * p)
{
- unsigned char buf[4];
- void *data;
- int size = 0;
- int res = 0;
-
- res = xread(v9ses, buf, sizeof(buf));
- if (res < 0) {
- dprintk(DEBUG_ERROR,
- "Reading of count field failed returned: %d\n", res);
- return res;
+ int i;
+ struct v9fs_mux_data *m;
+
+ m = container_of(p, struct v9fs_mux_data, pt);
+ for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++)
+ if (m->poll_waddr[i] == NULL)
+ break;
+
+ if (i >= ARRAY_SIZE(m->poll_waddr)) {
+ dprintk(DEBUG_ERROR, "not enough wait_address slots\n");
+ return;
}
- if (res < 4) {
- dprintk(DEBUG_ERROR,
- "Reading of count field failed returned: %d\n", res);
- return -EIO;
+ m->poll_waddr[i] = wait_address;
+
+ if (!wait_address) {
+ dprintk(DEBUG_ERROR, "no wait_address\n");
+ m->poll_waddr[i] = ERR_PTR(-EIO);
+ return;
}
- size = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
- dprintk(DEBUG_MUX, "got a packet count: %d\n", size);
+ init_waitqueue_entry(&m->poll_wait[i], m->poll_task->task);
+ add_wait_queue(wait_address, &m->poll_wait[i]);
+}
+
+/**
+ * v9fs_poll_mux - polls a mux and schedules read or write works if necessary
+ */
+static inline void v9fs_poll_mux(struct v9fs_mux_data *m)
+{
+ int n;
- /* adjust for the four bytes of size */
- size -= 4;
+ if (m->err < 0)
+ return;
- if (size > v9ses->maxdata) {
- dprintk(DEBUG_ERROR, "packet too big: %d\n", size);
- return -E2BIG;
+ n = m->trans->poll(m->trans, NULL);
+ if (n < 0 || n & (POLLERR | POLLHUP | POLLNVAL)) {
+ dprintk(DEBUG_MUX, "error mux %p err %d\n", m, n);
+ if (n >= 0)
+ n = -ECONNRESET;
+ v9fs_mux_cancel(m, n);
}
- data = kmalloc(size, GFP_KERNEL);
- if (!data) {
- eprintk(KERN_WARNING, "out of memory\n");
- return -ENOMEM;
+ if (n & POLLIN) {
+ set_bit(Rpending, &m->wsched);
+ dprintk(DEBUG_MUX, "mux %p can read\n", m);
+ if (!test_and_set_bit(Rworksched, &m->wsched)) {
+ dprintk(DEBUG_MUX, "schedule read work mux %p\n", m);
+ queue_work(v9fs_mux_wq, &m->rq);
+ }
}
- res = xread(v9ses, data, size);
- if (res < size) {
- dprintk(DEBUG_ERROR, "Reading of fcall failed returned: %d\n",
- res);
- kfree(data);
- return res;
+ if (n & POLLOUT) {
+ set_bit(Wpending, &m->wsched);
+ dprintk(DEBUG_MUX, "mux %p can write\n", m);
+ if ((m->wsize || !list_empty(&m->unsent_req_list))
+ && !test_and_set_bit(Wworksched, &m->wsched)) {
+ dprintk(DEBUG_MUX, "schedule write work mux %p\n", m);
+ queue_work(v9fs_mux_wq, &m->wq);
+ }
}
+}
+
+/**
+ * v9fs_poll_proc - polls all v9fs transports for new events and queues
+ * the appropriate work to the work queue
+ */
+static int v9fs_poll_proc(void *a)
+{
+ struct v9fs_mux_data *m, *mtmp;
+ struct v9fs_mux_poll_task *vpt;
- /* we now have an in-memory string that is the reply.
- * deserialize it. There is very little to go wrong at this point
- * save for v9fs_alloc errors.
- */
- res = v9fs_deserialize_fcall(v9ses, size, data, v9ses->maxdata,
- rcall, rcalllen);
+ vpt = a;
+ dprintk(DEBUG_MUX, "start %p %p\n", current, vpt);
+ allow_signal(SIGKILL);
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (signal_pending(current))
+ break;
- kfree(data);
+ list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) {
+ v9fs_poll_mux(m);
+ }
- if (res < 0)
- return res;
+ dprintk(DEBUG_MUX, "sleeping...\n");
+ schedule_timeout(SCHED_TIMEOUT * HZ);
+ }
+ __set_current_state(TASK_RUNNING);
+ dprintk(DEBUG_MUX, "finish\n");
return 0;
}
/**
- * v9fs_recv - receive an RPC response for a particular tag
- * @v9ses: session info structure
- * @req: RPC request structure
- *
+ * v9fs_write_work - called when a transport can send some data
*/
-
-static int v9fs_recv(struct v9fs_session_info *v9ses, struct v9fs_rpcreq *req)
+static void v9fs_write_work(void *a)
{
- int ret = 0;
+ int n, err;
+ struct v9fs_mux_data *m;
+ struct v9fs_req *req;
- dprintk(DEBUG_MUX, "waiting for response: %d\n", req->tcall->tag);
- ret = wait_event_interruptible(v9ses->read_wait,
- ((v9ses->transport->status != Connected) ||
- (req->rcall != 0) || (req->err < 0) ||
- dprintcond(v9ses, req)));
+ m = a;
- dprintk(DEBUG_MUX, "got it: rcall %p\n", req->rcall);
+ if (m->err < 0) {
+ clear_bit(Wworksched, &m->wsched);
+ return;
+ }
- spin_lock(&v9ses->muxlock);
- list_del(&req->next);
- spin_unlock(&v9ses->muxlock);
+ if (!m->wsize) {
+ if (list_empty(&m->unsent_req_list)) {
+ clear_bit(Wworksched, &m->wsched);
+ return;
+ }
- if (req->err < 0)
- return req->err;
+ spin_lock(&m->lock);
+ 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);
+ }
- if (v9ses->transport->status == Disconnected)
- return -ECONNRESET;
+ dprintk(DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos, m->wsize);
+ clear_bit(Wpending, &m->wsched);
+ err = m->trans->write(m->trans, m->wbuf + m->wpos, m->wsize - m->wpos);
+ dprintk(DEBUG_MUX, "mux %p sent %d bytes\n", m, err);
+ if (err == -EAGAIN) {
+ clear_bit(Wworksched, &m->wsched);
+ return;
+ }
- return ret;
-}
+ if (err <= 0)
+ goto error;
-/**
- * v9fs_send - send a 9P request
- * @v9ses: session info structure
- * @req: RPC request to send
- *
- */
+ m->wpos += err;
+ if (m->wpos == m->wsize)
+ m->wpos = m->wsize = 0;
+
+ if (m->wsize == 0 && !list_empty(&m->unsent_req_list)) {
+ if (test_and_clear_bit(Wpending, &m->wsched))
+ n = POLLOUT;
+ else
+ n = m->trans->poll(m->trans, NULL);
+
+ if (n & POLLOUT) {
+ dprintk(DEBUG_MUX, "schedule write work mux %p\n", m);
+ queue_work(v9fs_mux_wq, &m->wq);
+ } else
+ clear_bit(Wworksched, &m->wsched);
+ } else
+ clear_bit(Wworksched, &m->wsched);
+
+ return;
-static int v9fs_send(struct v9fs_session_info *v9ses, struct v9fs_rpcreq *req)
+ error:
+ v9fs_mux_cancel(m, err);
+ clear_bit(Wworksched, &m->wsched);
+}
+
+static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
{
- int ret = -1;
- void *data = NULL;
- struct v9fs_fcall *tcall = req->tcall;
+ int ecode, tag;
+ struct v9fs_str *ename;
- data = kmalloc(v9ses->maxdata + V9FS_IOHDRSZ, GFP_KERNEL);
- if (!data)
- return -ENOMEM;
+ tag = req->tag;
+ if (req->rcall->id == RERROR && !req->err) {
+ ecode = req->rcall->params.rerror.errno;
+ ename = &req->rcall->params.rerror.error;
- tcall->size = 0; /* enforce size recalculation */
- ret =
- v9fs_serialize_fcall(v9ses, tcall, data,
- v9ses->maxdata + V9FS_IOHDRSZ);
- if (ret < 0)
- goto free_data;
+ dprintk(DEBUG_MUX, "Rerror %.*s\n", ename->len, ename->str);
- spin_lock(&v9ses->muxlock);
- list_add(&req->next, &v9ses->mux_fcalls);
- spin_unlock(&v9ses->muxlock);
+ if (*m->extended)
+ req->err = -ecode;
- dprintk(DEBUG_MUX, "sending message: tag %d size %d\n", tcall->tag,
- tcall->size);
- ret = v9ses->transport->write(v9ses->transport, data, tcall->size);
+ if (!req->err) {
+ req->err = v9fs_errstr2errno(ename->str, ename->len);
- if (ret != tcall->size) {
- spin_lock(&v9ses->muxlock);
- list_del(&req->next);
- kfree(req->rcall);
+ if (!req->err) { /* string match failed */
+ PRINT_FCALL_ERROR("unknown error", req->rcall);
+ }
+
+ if (!req->err)
+ req->err = -ESERVERFAULT;
+ }
+ } else if (req->tcall && req->rcall->id != req->tcall->id + 1) {
+ dprintk(DEBUG_ERROR, "fcall mismatch: expected %d, got %d\n",
+ req->tcall->id + 1, req->rcall->id);
+ if (!req->err)
+ req->err = -EIO;
+ }
- spin_unlock(&v9ses->muxlock);
- if (ret >= 0)
- ret = -EREMOTEIO;
+ if (req->cb && req->err != ERREQFLUSH) {
+ dprintk(DEBUG_MUX, "calling callback tcall %p rcall %p\n",
+ req->tcall, req->rcall);
+
+ (*req->cb) (req->cba, req->tcall, req->rcall, req->err);
+ req->cb = NULL;
} else
- ret = 0;
+ kfree(req->rcall);
- free_data:
- kfree(data);
- return ret;
+ v9fs_mux_put_tag(m, tag);
+
+ wake_up(&m->equeue);
+ kfree(req);
}
/**
- * v9fs_mux_rpc - send a request, receive a response
- * @v9ses: session info structure
- * @tcall: fcall to send
- * @rcall: buffer to place response into
- *
+ * v9fs_read_work - called when there is some data to be read from a transport
*/
-
-long
-v9fs_mux_rpc(struct v9fs_session_info *v9ses, struct v9fs_fcall *tcall,
- struct v9fs_fcall **rcall)
+static void v9fs_read_work(void *a)
{
- int tid = -1;
- struct v9fs_fcall *fcall = NULL;
- struct v9fs_rpcreq req;
- int ret = -1;
-
- if (!v9ses)
- return -EINVAL;
-
- if (!v9ses->transport || v9ses->transport->status != Connected)
- return -EIO;
+ int n, err;
+ struct v9fs_mux_data *m;
+ struct v9fs_req *req, *rptr, *rreq;
+ struct v9fs_fcall *rcall;
+ char *rbuf;
+
+ m = a;
+
+ if (m->err < 0)
+ return;
+
+ 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;
+ }
- if (rcall)
- *rcall = NULL;
+ m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
+ m->rpos = 0;
+ }
- if (tcall->id != TVERSION) {
- tid = v9fs_get_idpool(&v9ses->tidpool);
- if (tid < 0)
- return -ENOMEM;
+ 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);
+ if (err == -EAGAIN) {
+ clear_bit(Rworksched, &m->wsched);
+ return;
}
- tcall->tag = tid;
+ if (err <= 0)
+ goto error;
- req.tcall = tcall;
- req.err = 0;
- req.rcall = NULL;
+ m->rpos += err;
+ while (m->rpos > 4) {
+ n = le32_to_cpu(*(__le32 *) m->rbuf);
+ if (n >= m->msize) {
+ dprintk(DEBUG_ERROR,
+ "requested packet size too big: %d\n", n);
+ err = -EIO;
+ goto error;
+ }
- ret = v9fs_send(v9ses, &req);
+ if (m->rpos < n)
+ break;
- if (ret < 0) {
- if (tcall->id != TVERSION)
- v9fs_put_idpool(tid, &v9ses->tidpool);
- dprintk(DEBUG_MUX, "error %d\n", ret);
- return ret;
- }
+ 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;
+ }
- ret = v9fs_recv(v9ses, &req);
-
- fcall = req.rcall;
-
- dprintk(DEBUG_MUX, "received: tag=%x, ret=%d\n", tcall->tag, ret);
- if (ret == -ERESTARTSYS) {
- if (v9ses->transport->status != Disconnected
- && tcall->id != TFLUSH) {
- unsigned long flags;
-
- dprintk(DEBUG_MUX, "flushing the tag: %d\n",
- tcall->tag);
- clear_thread_flag(TIF_SIGPENDING);
- v9fs_t_flush(v9ses, tcall->tag);
- spin_lock_irqsave(&current->sighand->siglock, flags);
- recalc_sigpending();
- spin_unlock_irqrestore(&current->sighand->siglock,
- flags);
- dprintk(DEBUG_MUX, "flushing done\n");
+ 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;
}
- goto release_req;
- } else if (ret < 0)
- goto release_req;
-
- if (!fcall)
- ret = -EIO;
- else {
- if (fcall->id == RERROR) {
- ret = v9fs_errstr2errno(fcall->params.rerror.error);
- if (ret == 0) { /* string match failed */
- if (fcall->params.rerror.errno)
- ret = -(fcall->params.rerror.errno);
- else
- ret = -ESERVERFAULT;
+ dprintk(DEBUG_MUX, "mux %p fcall id %d tag %d\n", m, rcall->id,
+ rcall->tag);
+
+ req = NULL;
+ spin_lock(&m->lock);
+ list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
+ if (rreq->tag == rcall->tag) {
+ req = rreq;
+ req->rcall = rcall;
+ list_del(&req->req_list);
+ spin_unlock(&m->lock);
+ process_request(m, req);
+ break;
}
- } else if (fcall->id != tcall->id + 1) {
- dprintk(DEBUG_ERROR,
- "fcall mismatch: expected %d, got %d\n",
- tcall->id + 1, fcall->id);
- ret = -EIO;
+
+ }
+
+ if (!req) {
+ spin_unlock(&m->lock);
+ if (err >= 0 && rcall->id != RFLUSH)
+ dprintk(DEBUG_ERROR,
+ "unexpected response mux %p id %d tag %d\n",
+ m, rcall->id, rcall->tag);
+ kfree(rcall);
}
}
- release_req:
- if (tcall->id != TVERSION)
- v9fs_put_idpool(tid, &v9ses->tidpool);
- if (rcall)
- *rcall = fcall;
- else
- kfree(fcall);
+ if (!list_empty(&m->req_list)) {
+ if (test_and_clear_bit(Rpending, &m->wsched))
+ n = POLLIN;
+ else
+ n = m->trans->poll(m->trans, NULL);
+
+ if (n & POLLIN) {
+ dprintk(DEBUG_MUX, "schedule read work mux %p\n", m);
+ queue_work(v9fs_mux_wq, &m->rq);
+ } else
+ clear_bit(Rworksched, &m->wsched);
+ } else
+ clear_bit(Rworksched, &m->wsched);
+
+ return;
- return ret;
+ error:
+ v9fs_mux_cancel(m, err);
+ clear_bit(Rworksched, &m->wsched);
}
/**
- * v9fs_mux_cancel_requests - cancels all pending requests
+ * v9fs_send_request - send 9P request
+ * The function can sleep until the request is scheduled for sending.
+ * The function can be interrupted. Return from the function is not
+ * a guarantee that the request is sent succesfully. Can return errors
+ * that can be retrieved by PTR_ERR macros.
*
- * @v9ses: session info structure
- * @err: error code to return to the requests
+ * @m: mux data
+ * @tc: request to be sent
+ * @cb: callback function to call when response is received
+ * @cba: parameter to pass to the callback function
*/
-void v9fs_mux_cancel_requests(struct v9fs_session_info *v9ses, int err)
+static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
+ struct v9fs_fcall *tc,
+ v9fs_mux_req_callback cb, void *cba)
{
- struct v9fs_rpcreq *rptr;
- struct v9fs_rpcreq *rreq;
+ int n;
+ struct v9fs_req *req;
- dprintk(DEBUG_MUX, " %d\n", err);
- spin_lock(&v9ses->muxlock);
- list_for_each_entry_safe(rreq, rptr, &v9ses->mux_fcalls, next) {
- rreq->err = err;
- }
- spin_unlock(&v9ses->muxlock);
- wake_up_all(&v9ses->read_wait);
-}
+ dprintk(DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current,
+ tc, tc->id);
+ if (m->err < 0)
+ return ERR_PTR(m->err);
-/**
- * v9fs_recvproc - kproc to handle demultiplexing responses
- * @data: session info structure
- *
- */
+ req = kmalloc(sizeof(struct v9fs_req), GFP_KERNEL);
+ if (!req)
+ return ERR_PTR(-ENOMEM);
-static int v9fs_recvproc(void *data)
-{
- struct v9fs_session_info *v9ses = (struct v9fs_session_info *)data;
- struct v9fs_fcall *rcall = NULL;
- struct v9fs_rpcreq *rptr;
- struct v9fs_rpcreq *req;
- struct v9fs_rpcreq *rreq;
- int err = 0;
+ if (tc->id == TVERSION)
+ n = V9FS_NOTAG;
+ else
+ n = v9fs_mux_get_tag(m);
- allow_signal(SIGKILL);
- set_current_state(TASK_INTERRUPTIBLE);
- complete(&v9ses->proccmpl);
- while (!kthread_should_stop() && err >= 0) {
- req = rptr = rreq = NULL;
-
- rcall = kmalloc(v9ses->maxdata + V9FS_IOHDRSZ, GFP_KERNEL);
- if (!rcall) {
- eprintk(KERN_ERR, "no memory for buffers\n");
- break;
- }
+ if (n < 0)
+ return ERR_PTR(-ENOMEM);
- err = read_message(v9ses, rcall, v9ses->maxdata + V9FS_IOHDRSZ);
- spin_lock(&v9ses->muxlock);
- if (err < 0) {
- list_for_each_entry_safe(rreq, rptr, &v9ses->mux_fcalls, next) {
- rreq->err = err;
- }
- if(err != -ERESTARTSYS)
- eprintk(KERN_ERR,
- "Transport error while reading message %d\n", err);
- } else {
- list_for_each_entry_safe(rreq, rptr, &v9ses->mux_fcalls, next) {
- if (rreq->tcall->tag == rcall->tag) {
- req = rreq;
- req->rcall = rcall;
- break;
- }
- }
- }
+ v9fs_set_tag(tc, n);
- if (req && (req->tcall->id == TFLUSH)) {
- struct v9fs_rpcreq *treq = NULL;
- list_for_each_entry_safe(treq, rptr, &v9ses->mux_fcalls, next) {
- if (treq->tcall->tag ==
- req->tcall->params.tflush.oldtag) {
- list_del(&rptr->next);
- kfree(treq->rcall);
- break;
- }
+ req->tag = n;
+ req->tcall = tc;
+ req->rcall = NULL;
+ req->err = 0;
+ req->cb = cb;
+ req->cba = cba;
+
+ spin_lock(&m->lock);
+ list_add_tail(&req->req_list, &m->unsent_req_list);
+ spin_unlock(&m->lock);
+
+ if (test_and_clear_bit(Wpending, &m->wsched))
+ n = POLLOUT;
+ else
+ n = m->trans->poll(m->trans, NULL);
+
+ if (n & POLLOUT && !test_and_set_bit(Wworksched, &m->wsched))
+ queue_work(v9fs_mux_wq, &m->wq);
+
+ return req;
+}
+
+static inline void
+v9fs_mux_flush_cb(void *a, struct v9fs_fcall *tc, struct v9fs_fcall *rc,
+ int err)
+{
+ v9fs_mux_req_callback cb;
+ int tag;
+ struct v9fs_mux_data *m;
+ struct v9fs_req *req, *rptr;
+
+ m = a;
+ dprintk(DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m, tc,
+ rc, err, tc->params.tflush.oldtag);
+
+ spin_lock(&m->lock);
+ cb = NULL;
+ tag = tc->params.tflush.oldtag;
+ list_for_each_entry_safe(req, rptr, &m->req_list, req_list) {
+ if (req->tag == tag) {
+ list_del(&req->req_list);
+ if (req->cb) {
+ cb = req->cb;
+ req->cb = NULL;
+ spin_unlock(&m->lock);
+ (*cb) (req->cba, req->tcall, req->rcall,
+ req->err);
}
+ kfree(req);
+ wake_up(&m->equeue);
+ break;
}
+ }
- spin_unlock(&v9ses->muxlock);
+ if (!cb)
+ spin_unlock(&m->lock);
- if (!req) {
- if (err >= 0)
- dprintk(DEBUG_ERROR,
- "unexpected response: id %d tag %d\n",
- rcall->id, rcall->tag);
+ v9fs_mux_put_tag(m, tag);
+ kfree(tc);
+ kfree(rc);
+}
- kfree(rcall);
- }
+static void
+v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req)
+{
+ struct v9fs_fcall *fc;
- wake_up_all(&v9ses->read_wait);
- set_current_state(TASK_INTERRUPTIBLE);
+ dprintk(DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
+
+ fc = v9fs_create_tflush(req->tag);
+ v9fs_send_request(m, fc, v9fs_mux_flush_cb, m);
+}
+
+static void
+v9fs_mux_rpc_cb(void *a, struct v9fs_fcall *tc, struct v9fs_fcall *rc, int err)
+{
+ struct v9fs_mux_rpc *r;
+
+ if (err == ERREQFLUSH) {
+ dprintk(DEBUG_MUX, "err req flush\n");
+ return;
}
- v9ses->transport->close(v9ses->transport);
+ r = a;
+ dprintk(DEBUG_MUX, "mux %p req %p tc %p rc %p err %d\n", r->m, r->req,
+ tc, rc, err);
+ r->rcall = rc;
+ r->err = err;
+ wake_up(&r->wqueue);
+}
- /* Inform all pending processes about the failure */
- wake_up_all(&v9ses->read_wait);
+/**
+ * v9fs_mux_rpc - sends 9P request and waits until a response is available.
+ * The function can be interrupted.
+ * @m: mux data
+ * @tc: request to be sent
+ * @rc: pointer where a pointer to the response is stored
+ */
+int
+v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
+ struct v9fs_fcall **rc)
+{
+ int err;
+ unsigned long flags;
+ struct v9fs_req *req;
+ struct v9fs_mux_rpc r;
+
+ r.err = 0;
+ r.rcall = NULL;
+ r.m = m;
+ init_waitqueue_head(&r.wqueue);
+
+ if (rc)
+ *rc = NULL;
+
+ req = v9fs_send_request(m, tc, v9fs_mux_rpc_cb, &r);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ dprintk(DEBUG_MUX, "error %d\n", err);
+ return PTR_ERR(req);
+ }
- if (signal_pending(current))
- complete(&v9ses->proccmpl);
+ r.req = req;
+ dprintk(DEBUG_MUX, "mux %p tc %p tag %d rpc %p req %p\n", m, tc,
+ req->tag, &r, req);
+ err = wait_event_interruptible(r.wqueue, r.rcall != NULL || r.err < 0);
+ if (r.err < 0)
+ err = r.err;
+
+ if (err == -ERESTARTSYS && m->trans->status == Connected && m->err == 0) {
+ spin_lock(&m->lock);
+ req->tcall = NULL;
+ req->err = ERREQFLUSH;
+ spin_unlock(&m->lock);
+
+ clear_thread_flag(TIF_SIGPENDING);
+ v9fs_mux_flush_request(m, req);
+ spin_lock_irqsave(&current->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
+ }
- dprintk(DEBUG_MUX, "recvproc: end\n");
- v9ses->recvproc = NULL;
+ if (!err) {
+ if (r.rcall)
+ dprintk(DEBUG_MUX, "got response id %d tag %d\n",
+ r.rcall->id, r.rcall->tag);
+
+ if (rc)
+ *rc = r.rcall;
+ else
+ kfree(r.rcall);
+ } else {
+ kfree(r.rcall);
+ dprintk(DEBUG_MUX, "got error %d\n", err);
+ if (err > 0)
+ err = -EIO;
+ }
- return err >= 0;
+ return err;
}
/**
- * v9fs_mux_init - initialize multiplexer (spawn kproc)
- * @v9ses: session info structure
- * @dev_name: mount device information (to create unique kproc)
- *
+ * v9fs_mux_rpcnb - sends 9P request without waiting for response.
+ * @m: mux data
+ * @tc: request to be sent
+ * @cb: callback function to be called when response arrives
+ * @cba: value to pass to the callback function
*/
+int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
+ v9fs_mux_req_callback cb, void *a)
+{
+ int err;
+ struct v9fs_req *req;
+
+ req = v9fs_send_request(m, tc, cb, a);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ dprintk(DEBUG_MUX, "error %d\n", err);
+ return PTR_ERR(req);
+ }
+
+ dprintk(DEBUG_MUX, "mux %p tc %p tag %d\n", m, tc, req->tag);
+ return 0;
+}
-int v9fs_mux_init(struct v9fs_session_info *v9ses, const char *dev_name)
+/**
+ * v9fs_mux_cancel - cancel all pending requests with error
+ * @m: mux data
+ * @err: error code
+ */
+void v9fs_mux_cancel(struct v9fs_mux_data *m, int err)
{
- char procname[60];
-
- strncpy(procname, dev_name, sizeof(procname));
- procname[sizeof(procname) - 1] = 0;
-
- init_waitqueue_head(&v9ses->read_wait);
- init_completion(&v9ses->fcread);
- init_completion(&v9ses->proccmpl);
- spin_lock_init(&v9ses->muxlock);
- INIT_LIST_HEAD(&v9ses->mux_fcalls);
- v9ses->recvproc = NULL;
- v9ses->curfcall = NULL;
-
- v9ses->recvproc = kthread_create(v9fs_recvproc, v9ses,
- "v9fs_recvproc %s", procname);
-
- if (IS_ERR(v9ses->recvproc)) {
- eprintk(KERN_ERR, "cannot create receiving thread\n");
- v9fs_session_close(v9ses);
- return -ECONNABORTED;
+ struct v9fs_req *req, *rtmp;
+ LIST_HEAD(cancel_list);
+
+ dprintk(DEBUG_MUX, "mux %p err %d\n", m, err);
+ m->err = err;
+ spin_lock(&m->lock);
+ list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) {
+ list_move(&req->req_list, &cancel_list);
}
+ spin_unlock(&m->lock);
- wake_up_process(v9ses->recvproc);
- wait_for_completion(&v9ses->proccmpl);
+ list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) {
+ list_del(&req->req_list);
+ if (!req->err)
+ req->err = err;
- return 0;
+ if (req->cb)
+ (*req->cb) (req->cba, req->tcall, req->rcall, req->err);
+ else
+ kfree(req->rcall);
+
+ kfree(req);
+ }
+
+ 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);
}
diff --git a/fs/9p/mux.h b/fs/9p/mux.h
index 4994cb10bad..9473b84f24b 100644
--- a/fs/9p/mux.h
+++ b/fs/9p/mux.h
@@ -3,6 +3,7 @@
*
* Multiplexer Definitions
*
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
@@ -23,19 +24,35 @@
*
*/
-/* structure to manage each RPC transaction */
+struct v9fs_mux_data;
-struct v9fs_rpcreq {
- struct v9fs_fcall *tcall;
- struct v9fs_fcall *rcall;
- int err; /* error code if response failed */
+/**
+ * v9fs_mux_req_callback - callback function that is called when the
+ * response of a request is received. The callback is called from
+ * a workqueue and shouldn't block.
+ *
+ * @a - the pointer that was specified when the request was send to be
+ * passed to the callback
+ * @tc - request call
+ * @rc - response call
+ * @err - error code (non-zero if error occured)
+ */
+typedef void (*v9fs_mux_req_callback)(void *a, struct v9fs_fcall *tc,
+ struct v9fs_fcall *rc, int err);
+
+int v9fs_mux_global_init(void);
+void v9fs_mux_global_exit(void);
- /* XXX - could we put scatter/gather buffers here? */
+struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
+ unsigned char *extended);
+void v9fs_mux_destroy(struct v9fs_mux_data *);
- struct list_head next;
-};
+int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
+struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
+int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
+int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
+ v9fs_mux_req_callback cb, void *a);
-int v9fs_mux_init(struct v9fs_session_info *v9ses, const char *dev_name);
-long v9fs_mux_rpc(struct v9fs_session_info *v9ses,
- struct v9fs_fcall *tcall, struct v9fs_fcall **rcall);
-void v9fs_mux_cancel_requests(struct v9fs_session_info *v9ses, int err);
+void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
+void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);
+int v9fs_errstr2errno(char *errstr, int len);
diff --git a/fs/9p/trans_fd.c b/fs/9p/trans_fd.c
index 63b58ce98ff..1a28ef97a3d 100644
--- a/fs/9p/trans_fd.c
+++ b/fs/9p/trans_fd.c
@@ -3,6 +3,7 @@
*
* File Descriptor Transport Layer
*
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
@@ -106,9 +107,6 @@ v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
return -ENOPROTOOPT;
}
- sema_init(&trans->writelock, 1);
- sema_init(&trans->readlock, 1);
-
ts = kmalloc(sizeof(struct v9fs_trans_fd), GFP_KERNEL);
if (!ts)
@@ -148,12 +146,12 @@ static void v9fs_fd_close(struct v9fs_transport *trans)
if (!trans)
return;
- trans->status = Disconnected;
- ts = trans->priv;
+ ts = xchg(&trans->priv, NULL);
if (!ts)
return;
+ trans->status = Disconnected;
if (ts->in_file)
fput(ts->in_file);
@@ -163,10 +161,55 @@ static void v9fs_fd_close(struct v9fs_transport *trans)
kfree(ts);
}
+static unsigned int
+v9fs_fd_poll(struct v9fs_transport *trans, struct poll_table_struct *pt)
+{
+ int ret, n;
+ struct v9fs_trans_fd *ts;
+ mm_segment_t oldfs;
+
+ if (!trans)
+ return -EIO;
+
+ ts = trans->priv;
+ if (trans->status != Connected || !ts)
+ return -EIO;
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+
+ if (!ts->in_file->f_op || !ts->in_file->f_op->poll) {
+ ret = -EIO;
+ goto end;
+ }
+
+ ret = ts->in_file->f_op->poll(ts->in_file, pt);
+
+ if (ts->out_file != ts->in_file) {
+ if (!ts->out_file->f_op || !ts->out_file->f_op->poll) {
+ ret = -EIO;
+ goto end;
+ }
+
+ n = ts->out_file->f_op->poll(ts->out_file, pt);
+
+ ret &= ~POLLOUT;
+ n &= ~POLLIN;
+
+ ret |= n;
+ }
+
+end:
+ set_fs(oldfs);
+ return ret;
+}
+
+
struct v9fs_transport v9fs_trans_fd = {
.init = v9fs_fd_init,
.write = v9fs_fd_send,
.read = v9fs_fd_recv,
.close = v9fs_fd_close,
+ .poll = v9fs_fd_poll,
};
diff --git a/fs/9p/trans_sock.c b/fs/9p/trans_sock.c
index 6a9a75d40f7..44e830697ac 100644
--- a/fs/9p/trans_sock.c
+++ b/fs/9p/trans_sock.c
@@ -3,6 +3,7 @@
*
* Socket Transport Layer
*
+ * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
* Copyright (C) 1995, 1996 by Olaf Kirch <okir@monad.swb.de>
@@ -36,6 +37,7 @@
#include <asm/uaccess.h>
#include <linux/inet.h>
#include <linux/idr.h>
+#include <linux/file.h>
#include "debug.h"
#include "v9fs.h"
@@ -45,6 +47,7 @@
struct v9fs_trans_sock {
struct socket *s;
+ struct file *filp;
};
/**
@@ -57,41 +60,26 @@ struct v9fs_trans_sock {
static int v9fs_sock_recv(struct v9fs_transport *trans, void *v, int len)
{
- struct msghdr msg;
- struct kvec iov;
- int result;
- mm_segment_t oldfs;
- struct v9fs_trans_sock *ts = trans ? trans->priv : NULL;
+ int ret;
+ struct v9fs_trans_sock *ts;
- if (trans->status == Disconnected)
+ if (!trans || trans->status == Disconnected) {
+ dprintk(DEBUG_ERROR, "disconnected ...\n");
return -EREMOTEIO;
+ }
- result = -EINVAL;
-
- oldfs = get_fs();
- set_fs(get_ds());
-
- iov.iov_base = v;
- iov.iov_len = len;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_iovlen = 1;
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
- msg.msg_namelen = 0;
- msg.msg_flags = MSG_NOSIGNAL;
+ ts = trans->priv;
- result = kernel_recvmsg(ts->s, &msg, &iov, 1, len, 0);
+ if (!(ts->filp->f_flags & O_NONBLOCK))
+ dprintk(DEBUG_ERROR, "blocking read ...\n");
- dprintk(DEBUG_TRANS, "socket state %d\n", ts->s->state);
- set_fs(oldfs);
-
- if (result <= 0) {
- if (result != -ERESTARTSYS)
+ ret = kernel_read(ts->filp, ts->filp->f_pos, v, len);
+ if (ret <= 0) {
+ if (ret != -ERESTARTSYS && ret != -EAGAIN)
trans->status = Disconnected;
}
- return result;
+ return ret;
}
/**
@@ -104,40 +92,72 @@ static int v9fs_sock_recv(struct v9fs_transport *trans, void *v, int len)
static int v9fs_sock_send(struct v9fs_transport *trans, void *v, int len)
{
- struct kvec iov;
- struct msghdr msg;
- int result = -1;
+ int ret;
mm_segment_t oldfs;
- struct v9fs_trans_sock *ts = trans ? trans->priv : NULL;
+ struct v9fs_trans_sock *ts;
- dprintk(DEBUG_TRANS, "Sending packet size %d (%x)\n", len, len);
- dump_data(v, len);
+ if (!trans || trans->status == Disconnected) {
+ dprintk(DEBUG_ERROR, "disconnected ...\n");
+ return -EREMOTEIO;
+ }
+
+ ts = trans->priv;
+ if (!ts) {
+ dprintk(DEBUG_ERROR, "no transport ...\n");
+ return -EREMOTEIO;
+ }
- down(&trans->writelock);
+ if (!(ts->filp->f_flags & O_NONBLOCK))
+ dprintk(DEBUG_ERROR, "blocking write ...\n");
oldfs = get_fs();
set_fs(get_ds());
- iov.iov_base = v;
- iov.iov_len = len;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_iovlen = 1;
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
- msg.msg_namelen = 0;
- msg.msg_flags = MSG_NOSIGNAL;
- result = kernel_sendmsg(ts->s, &msg, &iov, 1, len);
+ ret = vfs_write(ts->filp, (void __user *)v, len, &ts->filp->f_pos);
set_fs(oldfs);
- if (result < 0) {
- if (result != -ERESTARTSYS)
+ if (ret < 0) {
+ if (ret != -ERESTARTSYS)
trans->status = Disconnected;
}
- up(&trans->writelock);
- return result;
+ return ret;
+}
+
+static unsigned int v9fs_sock_poll(struct v9fs_transport *trans,
+ struct poll_table_struct *pt) {
+
+ int ret;
+ struct v9fs_trans_sock *ts;
+ mm_segment_t oldfs;
+
+ if (!trans) {
+ dprintk(DEBUG_ERROR, "no transport\n");
+ return -EIO;
+ }
+
+ ts = trans->priv;
+ if (trans->status != Connected || !ts) {
+ dprintk(DEBUG_ERROR, "transport disconnected: %d\n", trans->status);
+ return -EIO;
+ }
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+
+ if (!ts->filp->f_op || !ts->filp->f_op->poll) {
+ dprintk(DEBUG_ERROR, "no poll operation\n");
+ ret = -EIO;
+ goto end;
+ }
+
+ ret = ts->filp->f_op->poll(ts->filp, pt);
+
+end:
+ set_fs(oldfs);
+ return ret;
}
+
/**
* v9fs_tcp_init - initialize TCP socket
* @v9ses: session information
@@ -154,9 +174,9 @@ v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
int rc = 0;
struct v9fs_trans_sock *ts = NULL;
struct v9fs_transport *trans = v9ses->transport;
+ int fd;
- sema_init(&trans->writelock, 1);
- sema_init(&trans->readlock, 1);
+ trans->status = Disconnected;
ts = kmalloc(sizeof(struct v9fs_trans_sock), GFP_KERNEL);
@@ -165,6 +185,7 @@ v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
trans->priv = ts;
ts->s = NULL;
+ ts->filp = NULL;
if (!addr)
return -EINVAL;
@@ -185,7 +206,18 @@ v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
return rc;
}
csocket->sk->sk_allocation = GFP_NOIO;
+
+ fd = sock_map_fd(csocket);
+ if (fd < 0) {
+ sock_release(csocket);
+ kfree(ts);
+ trans->priv = NULL;
+ return fd;
+ }
+
ts->s = csocket;
+ ts->filp = fget(fd);
+ ts->filp->f_flags |= O_NONBLOCK;
trans->status = Connected;
return 0;
@@ -203,7 +235,7 @@ static int
v9fs_unix_init(struct v9fs_session_info *v9ses, const char *dev_name,
char *data)
{
- int rc;
+ int rc, fd;
struct socket *csocket;
struct sockaddr_un sun_server;
struct v9fs_transport *trans;
@@ -213,6 +245,8 @@ v9fs_unix_init(struct v9fs_session_info *v9ses, const char *dev_name,
csocket = NULL;
trans = v9ses->transport;
+ trans->status = Disconnected;
+
if (strlen(dev_name) > UNIX_PATH_MAX) {
eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n",
dev_name);
@@ -225,9 +259,7 @@ v9fs_unix_init(struct v9fs_session_info *v9ses, const char *dev_name,
trans->priv = ts;
ts->s = NULL;
-
- sema_init(&trans->writelock, 1);
- sema_init(&trans->readlock, 1);
+ ts->filp = NULL;
sun_server.sun_family = PF_UNIX;
strcpy(sun_server.sun_path, dev_name);
@@ -241,7 +273,18 @@ v9fs_unix_init(struct v9fs_session_info *v9ses, const char *dev_name,
return rc;
}
csocket->sk->sk_allocation = GFP_NOIO;
+
+ fd = sock_map_fd(csocket);
+ if (fd < 0) {
+ sock_release(csocket);
+ kfree(ts);
+ trans->priv = NULL;
+ return fd;
+ }
+
ts->s = csocket;
+ ts->filp = fget(fd);
+ ts->filp->f_flags |= O_NONBLOCK;
trans->status = Connected;
return 0;
@@ -262,12 +305,11 @@ static void v9fs_sock_close(struct v9fs_transport *trans)
ts = trans->priv;
- if ((ts) && (ts->s)) {
- dprintk(DEBUG_TRANS, "closing the socket %p\n", ts->s);
- sock_release(ts->s);
+ if ((ts) && (ts->filp)) {
+ fput(ts->filp);
+ ts->filp = NULL;
ts->s = NULL;
trans->status = Disconnected;
- dprintk(DEBUG_TRANS, "socket closed\n");
}
kfree(ts);
@@ -280,6 +322,7 @@ struct v9fs_transport v9fs_trans_tcp = {
.write = v9fs_sock_send,
.read = v9fs_sock_recv,
.close = v9fs_sock_close,
+ .poll = v9fs_sock_poll,
};
struct v9fs_transport v9fs_trans_unix = {
@@ -287,4 +330,5 @@ struct v9fs_transport v9fs_trans_unix = {
.write = v9fs_sock_send,
.read = v9fs_sock_recv,
.close = v9fs_sock_close,
+ .poll = v9fs_sock_poll,
};
diff --git a/fs/9p/transport.h b/fs/9p/transport.h
index 9e9cd418efd..91fcdb94b36 100644
--- a/fs/9p/transport.h
+++ b/fs/9p/transport.h
@@ -3,6 +3,7 @@
*
* Transport Definition
*
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
@@ -31,14 +32,13 @@ enum v9fs_transport_status {
struct v9fs_transport {
enum v9fs_transport_status status;
- struct semaphore writelock;
- struct semaphore readlock;
void *priv;
int (*init) (struct v9fs_session_info *, const char *, char *);
int (*write) (struct v9fs_transport *, void *, int);
int (*read) (struct v9fs_transport *, void *, int);
void (*close) (struct v9fs_transport *);
+ unsigned int (*poll)(struct v9fs_transport *, struct poll_table_struct *);
};
extern struct v9fs_transport v9fs_trans_tcp;
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 418c3743fde..5250c428fc1 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -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 */
@@ -213,7 +212,8 @@ retry:
return -1;
}
- error = idr_get_new(&p->pool, NULL, &i);
+ /* no need to store exactly p, we just need something non-null */
+ error = idr_get_new(&p->pool, p, &i);
up(&p->lock);
if (error == -EAGAIN)
@@ -243,6 +243,16 @@ void v9fs_put_idpool(int id, struct v9fs_idpool *p)
}
/**
+ * v9fs_check_idpool - check if the specified id is available
+ * @id - id to check
+ * @p - pool
+ */
+int v9fs_check_idpool(int id, struct v9fs_idpool *p)
+{
+ return idr_find(&p->pool, id) != NULL;
+}
+
+/**
* v9fs_session_init - initialize session
* @v9ses: session information structure
* @dev_name: device being mounted
@@ -259,6 +269,7 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
int n = 0;
int newfid = -1;
int retval = -EINVAL;
+ struct v9fs_str *version;
v9ses->name = __getname();
if (!v9ses->name)
@@ -281,9 +292,6 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
/* id pools that are session-dependent: FIDs and TIDs */
idr_init(&v9ses->fidpool.pool);
init_MUTEX(&v9ses->fidpool.lock);
- idr_init(&v9ses->tidpool.pool);
- init_MUTEX(&v9ses->tidpool.lock);
-
switch (v9ses->proto) {
case PROTO_TCP:
@@ -320,7 +328,12 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
v9ses->shutdown = 0;
v9ses->session_hung = 0;
- if ((retval = v9fs_mux_init(v9ses, dev_name)) < 0) {
+ v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ,
+ &v9ses->extended);
+
+ if (IS_ERR(v9ses->mux)) {
+ retval = PTR_ERR(v9ses->mux);
+ v9ses->mux = NULL;
dprintk(DEBUG_ERROR, "problem initializing mux\n");
goto SessCleanUp;
}
@@ -339,13 +352,16 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
goto FreeFcall;
}
- /* Really should check for 9P1 and report error */
- if (!strcmp(fcall->params.rversion.version, "9P2000.u")) {
+ version = &fcall->params.rversion.version;
+ if (version->len==8 && !memcmp(version->str, "9P2000.u", 8)) {
dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n");
v9ses->extended = 1;
- } else {
+ } else if (version->len==6 && !memcmp(version->str, "9P2000", 6)) {
dprintk(DEBUG_9P, "9P2000 legacy mode enabled\n");
v9ses->extended = 0;
+ } else {
+ retval = -EREMOTEIO;
+ goto FreeFcall;
}
n = fcall->params.rversion.msize;
@@ -381,7 +397,7 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
}
if (v9ses->afid != ~0) {
- if (v9fs_t_clunk(v9ses, v9ses->afid, NULL))
+ if (v9fs_t_clunk(v9ses, v9ses->afid))
dprintk(DEBUG_ERROR, "clunk failed\n");
}
@@ -403,13 +419,16 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
void v9fs_session_close(struct v9fs_session_info *v9ses)
{
- if (v9ses->recvproc) {
- send_sig(SIGKILL, v9ses->recvproc, 1);
- wait_for_completion(&v9ses->proccmpl);
+ if (v9ses->mux) {
+ v9fs_mux_destroy(v9ses->mux);
+ v9ses->mux = NULL;
}
- if (v9ses->transport)
+ if (v9ses->transport) {
v9ses->transport->close(v9ses->transport);
+ kfree(v9ses->transport);
+ v9ses->transport = NULL;
+ }
__putname(v9ses->name);
__putname(v9ses->remotename);
@@ -420,8 +439,9 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
* and cancel all pending requests.
*/
void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
+ dprintk(DEBUG_ERROR, "cancel session %p\n", v9ses);
v9ses->transport->status = Disconnected;
- v9fs_mux_cancel_requests(v9ses, -EIO);
+ v9fs_mux_cancel(v9ses->mux, -EIO);
}
extern int v9fs_error_init(void);
@@ -433,11 +453,17 @@ extern int v9fs_error_init(void);
static int __init init_v9fs(void)
{
+ int ret;
+
v9fs_error_init();
printk(KERN_INFO "Installing v9fs 9P2000 file system support\n");
- return register_filesystem(&v9fs_fs_type);
+ ret = v9fs_mux_global_init();
+ if (!ret)
+ ret = register_filesystem(&v9fs_fs_type);
+
+ return ret;
}
/**
@@ -447,6 +473,7 @@ static int __init init_v9fs(void)
static void __exit exit_v9fs(void)
{
+ v9fs_mux_global_exit();
unregister_filesystem(&v9fs_fs_type);
}
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 45dcef42bdd..f337da7a0ee 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -57,24 +57,14 @@ struct v9fs_session_info {
/* book keeping */
struct v9fs_idpool fidpool; /* The FID pool for file descriptors */
- struct v9fs_idpool tidpool; /* The TID pool for transactions ids */
- /* transport information */
struct v9fs_transport *transport;
+ struct v9fs_mux_data *mux;
int inprogress; /* session in progress => true */
int shutdown; /* session shutting down. no more attaches. */
unsigned char session_hung;
-
- /* mux private data */
- struct v9fs_fcall *curfcall;
- wait_queue_head_t read_wait;
- struct completion fcread;
- struct completion proccmpl;
- struct task_struct *recvproc;
-
- spinlock_t muxlock;
- struct list_head mux_fcalls;
+ struct dentry *debugfs_dir;
};
/* possible values of ->proto */
@@ -84,11 +74,14 @@ enum {
PROTO_FD,
};
+extern struct dentry *v9fs_debugfs_root;
+
int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
void v9fs_session_close(struct v9fs_session_info *v9ses);
int v9fs_get_idpool(struct v9fs_idpool *p);
void v9fs_put_idpool(int id, struct v9fs_idpool *p);
+int v9fs_check_idpool(int id, struct v9fs_idpool *p);
void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 2f2cea7ee3e..c78502ad00e 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -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 *);
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index a6aa947de0f..2dd806dac9f 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -40,7 +40,6 @@
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
-#include "conv.h"
#include "fid.h"
/**
@@ -95,24 +94,22 @@ static int v9fs_dentry_validate(struct dentry *dentry, struct nameidata *nd)
void v9fs_dentry_release(struct dentry *dentry)
{
+ int err;
+
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
if (dentry->d_fsdata != NULL) {
struct list_head *fid_list = dentry->d_fsdata;
struct v9fs_fid *temp = NULL;
struct v9fs_fid *current_fid = NULL;
- struct v9fs_fcall *fcall = NULL;
list_for_each_entry_safe(current_fid, temp, fid_list, list) {
- if (v9fs_t_clunk
- (current_fid->v9ses, current_fid->fid, &fcall))
- dprintk(DEBUG_ERROR, "clunk failed: %s\n",
- FCALL_ERROR(fcall));
+ err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid);
- v9fs_put_idpool(current_fid->fid,
- &current_fid->v9ses->fidpool);
+ if (err < 0)
+ dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n",
+ err, dentry->d_iname);
- kfree(fcall);
v9fs_fid_destroy(current_fid);
}
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 57a43b8feef..ae6d032b9b5 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -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"
/**
@@ -74,20 +74,16 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
struct inode *inode = filp->f_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *file = filp->private_data;
- unsigned int i, n;
+ 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;
@@ -97,20 +93,20 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
n = file->rdir_fcall->params.rread.count;
i = file->rdir_fpos;
while (i < n) {
- int s = v9fs_deserialize_stat(v9ses,
- file->rdir_fcall->params.rread.data + i,
- n - i, mi, v9ses->maxdata);
+ s = v9fs_deserialize_stat(
+ file->rdir_fcall->params.rread.data + i,
+ 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;
@@ -130,7 +126,7 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
while (!over) {
ret = v9fs_t_read(v9ses, fid, filp->f_pos,
- v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
+ v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
if (ret < 0) {
dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
ret, fcall);
@@ -141,19 +137,18 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
n = ret;
i = 0;
while (i < n) {
- int s = v9fs_deserialize_stat(v9ses,
- fcall->params.rread.data + i, n - i, mi,
- v9ses->maxdata);
+ s = v9fs_deserialize_stat(fcall->params.rread.data + i,
+ 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;
@@ -172,7 +167,6 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
FreeStructs:
kfree(fcall);
- kfree(mi);
return ret;
}
@@ -193,18 +187,15 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
fid->fid);
fidnum = fid->fid;
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
if (fidnum >= 0) {
dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
fid->fid);
- if (v9fs_t_clunk(v9ses, fidnum, NULL))
+ if (v9fs_t_clunk(v9ses, fidnum))
dprintk(DEBUG_ERROR, "clunk failed\n");
- v9fs_put_idpool(fid->fid, &v9ses->fidpool);
-
kfree(fid->rdir_fcall);
kfree(fid);
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 89c849da850..6852f0eb96e 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -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;
}
@@ -165,8 +164,7 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
return -ENOLCK;
if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
invalidate_inode_pages(&inode->i_data);
}
@@ -257,7 +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);
@@ -265,28 +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;
@@ -306,7 +289,6 @@ v9fs_file_write(struct file *filp, const char __user * data,
total += result;
} while (count);
- kfree(buf);
return total;
}
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 0ea965c3bb7..d933ef1fbd8 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -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;
}
/**
@@ -312,12 +243,12 @@ 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;
unsigned int iounit = 0;
int wfidno = -1;
+ int err;
perm = unixmode2p9mode(v9ses, perm);
@@ -349,57 +280,64 @@ 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;
}
kfree(fcall);
+ fcall = NULL;
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;
}
iounit = fcall->params.rcreate.iounit;
qid = fcall->params.rcreate.qid;
kfree(fcall);
+ fcall = NULL;
- fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1);
- dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate);
- if (!fid) {
- result = -ENOMEM;
- goto CleanUpFid;
- }
+ if (!(perm&V9FS_DMDIR)) {
+ fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1);
+ dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate);
+ if (!fid) {
+ result = -ENOMEM;
+ goto CleanUpFid;
+ }
- fid->qid = qid;
- fid->iounit = iounit;
+ fid->qid = qid;
+ fid->iounit = iounit;
+ } else {
+ err = v9fs_t_clunk(v9ses, newfid);
+ newfid = -1;
+ if (err < 0)
+ dprintk(DEBUG_ERROR, "clunk for mkdir failed: %d\n", err);
+ }
/* walk to the newly created file and put the fid in the dentry */
wfidno = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
+ if (wfidno < 0) {
eprintk(KERN_WARNING, "no free fids available\n");
return -ENOSPC;
}
result = v9fs_t_walk(v9ses, dirfidnum, wfidno,
- (char *) file_dentry->d_name.name, NULL);
+ (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;
}
+ kfree(fcall);
+ fcall = NULL;
if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) {
- if (!v9fs_t_clunk(v9ses, newfid, &fcall)) {
- v9fs_put_idpool(wfidno, &v9ses->fidpool);
- }
+ v9fs_put_idpool(wfidno, &v9ses->fidpool);
goto CleanUpFid;
}
@@ -409,62 +347,43 @@ v9fs_create(struct inode *dir,
(perm & V9FS_DMDEVICE))
return 0;
- result = v9fs_t_stat(v9ses, newfid, &fcall);
+ 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;
d_instantiate(file_dentry, file_inode);
- if (perm & V9FS_DMDIR) {
- if (!v9fs_t_clunk(v9ses, newfid, &fcall))
- v9fs_put_idpool(newfid, &v9ses->fidpool);
- else
- dprintk(DEBUG_ERROR, "clunk for mkdir failed: %s\n",
- FCALL_ERROR(fcall));
- kfree(fcall);
- fid->fidopen = 0;
- fid->fidcreate = 0;
- d_drop(file_dentry);
- }
-
return 0;
CleanUpFid:
kfree(fcall);
+ fcall = NULL;
if (newfid >= 0) {
- if (!v9fs_t_clunk(v9ses, newfid, &fcall))
- v9fs_put_idpool(newfid, &v9ses->fidpool);
- else
- dprintk(DEBUG_ERROR, "clunk failed: %s\n",
- FCALL_ERROR(fcall));
-
- kfree(fcall);
+ err = v9fs_t_clunk(v9ses, newfid);
+ if (err < 0)
+ dprintk(DEBUG_ERROR, "clunk failed: %d\n", err);
}
if (wfidno >= 0) {
- if (!v9fs_t_clunk(v9ses, wfidno, &fcall))
- v9fs_put_idpool(wfidno, &v9ses->fidpool);
- else
- dprintk(DEBUG_ERROR, "clunk failed: %s\n",
- FCALL_ERROR(fcall));
-
- kfree(fcall);
+ err = v9fs_t_clunk(v9ses, wfidno);
+ if (err < 0)
+ dprintk(DEBUG_ERROR, "clunk failed: %d\n", err);
}
return result;
}
@@ -509,10 +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);
}
@@ -567,7 +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;
@@ -620,8 +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",
@@ -631,7 +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) {
@@ -640,10 +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);
@@ -699,7 +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;
@@ -708,9 +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;
@@ -734,26 +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;
@@ -788,7 +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);
}
@@ -809,57 +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) {
- mistat->uid = ptr;
- ptr += 1+sprintf(ptr, "%08x", iattr->ia_uid);
- mistat->n_uid = iattr->ia_uid;
- }
+ if (iattr->ia_valid & ATTR_UID)
+ wstat.n_uid = iattr->ia_uid;
- if (iattr->ia_valid & ATTR_GID) {
- mistat->gid = ptr;
- ptr += 1+sprintf(ptr, "%08x", iattr->ia_gid);
- mistat->n_gid = iattr->ia_gid;
- }
+ if (iattr->ia_valid & ATTR_GID)
+ wstat.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);
@@ -867,51 +757,47 @@ 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,
- struct super_block *sb)
+v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
+ struct super_block *sb)
{
+ int n;
+ 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;
+ inode->i_uid = v9ses->uid;
+ inode->i_gid = v9ses->gid;
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);
+ inode->i_uid = stat->n_uid;
+ inode->i_gid = stat->n_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);
+ 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);
+
+ n = stat->extension.len;
+ if (n > sizeof(ext)-1)
+ n = sizeof(ext)-1;
+ memmove(ext, stat->extension.str, n);
+ ext[n] = 0;
+ sscanf(ext, "%c %u %u", &type, &major, &minor);
switch (type) {
case 'c':
inode->i_mode &= ~S_IFBLK;
@@ -920,14 +806,14 @@ 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 =
@@ -955,71 +841,6 @@ ino_t v9fs_qid2ino(struct v9fs_qid *qid)
}
/**
- * 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);
-
- 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);
-
- if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
- dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
- FCALL_ERROR(fcall));
- 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
* @buffer: buffer to load symlink location into
@@ -1058,16 +879,17 @@ 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;
@@ -1157,6 +979,77 @@ 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
@@ -1173,64 +1066,24 @@ 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 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;
- }
-
- /* get fid of old_dentry */
- sprintf(symname, "hardlink(%d)\n", oldfid->fid);
-
- /* 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);
-
- if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
- dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
- FCALL_ERROR(fcall));
- goto FreeMem;
+ oldfid = v9fs_fid_lookup(old_dentry);
+ if (!oldfid) {
+ dprintk(DEBUG_ERROR, "can't find oldfid\n");
+ return -EPERM;
}
- d_drop(dentry); /* FID - will this also clunk? */
-
- kfree(fcall);
- fcall = NULL;
+ name = __getname();
+ sprintf(name, "hardlink(%d)\n", oldfid->fid);
+ retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
+ __putname(name);
- FreeMem:
- kfree(mistat);
- kfree(fcall);
- __putname(symname);
return retval;
}
@@ -1246,82 +1099,30 @@ 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 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;
- }
-
- 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;
- }
+ __putname(name);
+ return -EINVAL;
}
- /* need to update dcache so we show up */
- kfree(fcall);
-
- if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
- dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
- FCALL_ERROR(fcall));
- 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;
}
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 82c5b008407..ae0f06b3c11 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -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 *);
@@ -123,12 +122,13 @@ 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 = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return ERR_PTR(-ENOMEM);
if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
dprintk(DEBUG_ERROR, "problem initiating session\n");
+ kfree(v9ses);
return ERR_PTR(newfid);
}
@@ -157,7 +157,7 @@ static struct super_block *v9fs_get_sb(struct file_system_type
stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
if (stat_result < 0) {
dprintk(DEBUG_ERROR, "stat error\n");
- v9fs_t_clunk(v9ses, newfid, NULL);
+ v9fs_t_clunk(v9ses, newfid);
v9fs_put_idpool(newfid, &v9ses->fidpool);
} else {
/* Setup the Root Inode */
@@ -167,10 +167,10 @@ 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 20:36:35 +0000