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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: remove sysctl
  9p: fix bad kconfig cross-dependency
  9p: soften invalidation in loose_mode
  9p: attach-per-user
  9p: rename uid and gid parameters
  9p: define session flags
  9p: Make transports dynamic
This commit is contained in:
Linus Torvalds 2007-10-17 15:05:58 -07:00
parent c2f73fd07d 982c37cfb6
commit 9d8190f87b
19 changed files with 700 additions and 500 deletions
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22
Documentation/filesystems/9p.txt
View File

@ -35,12 +35,12 @@ For remote file server:
For Plan 9 From User Space applications (http://swtch.com/plan9)
mount -t 9p `namespace`/acme /mnt/9 -o proto=unix,uname=$USER
mount -t 9p `namespace`/acme /mnt/9 -o trans=unix,uname=$USER
OPTIONS
=======
proto=name select an alternative transport. Valid options are
trans=name select an alternative transport. Valid options are
currently:
unix - specifying a named pipe mount point
tcp - specifying a normal TCP/IP connection
@ -68,9 +68,9 @@ OPTIONS
0x40 = display transport debug
0x80 = display allocation debug
rfdno=n the file descriptor for reading with proto=fd
rfdno=n the file descriptor for reading with trans=fd
wfdno=n the file descriptor for writing with proto=fd
wfdno=n the file descriptor for writing with trans=fd
maxdata=n the number of bytes to use for 9p packet payload (msize)
@ -78,9 +78,9 @@ OPTIONS
noextend force legacy mode (no 9p2000.u semantics)
uid attempt to mount as a particular uid
dfltuid attempt to mount as a particular uid
gid attempt to mount with a particular gid
dfltgid attempt to mount with a particular gid
afid security channel - used by Plan 9 authentication protocols
@ -88,6 +88,16 @@ OPTIONS
This can be used to share devices/named pipes/sockets between
hosts. This functionality will be expanded in later versions.
access there are three access modes.
user = if a user tries to access a file on v9fs
filesystem for the first time, v9fs sends an
attach command (Tattach) for that user.
This is the default mode.
<uid> = allows only user with uid=<uid> to access
the files on the mounted filesystem
any = v9fs does single attach and performs all
operations as one user
RESOURCES
=========

161
fs/9p/fid.c
View File

@ -1,6 +1,7 @@
/*
* V9FS FID Management
*
* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2005, 2006 by Eric Van Hensbergen <ericvh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
@ -34,9 +35,9 @@
#include "fid.h"
/**
* v9fs_fid_insert - add a fid to a dentry
* v9fs_fid_add - add a fid to a dentry
* @dentry: dentry that the fid is being added to
* @fid: fid to add
* @dentry: dentry that it is being added to
*
*/
@ -66,52 +67,144 @@ int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
}
/**
* v9fs_fid_lookup - return a locked fid from a dentry
* v9fs_fid_find - retrieve a fid that belongs to the specified uid
* @dentry: dentry to look for fid in
* @uid: return fid that belongs to the specified user
* @any: if non-zero, return any fid associated with the dentry
*
*/
static struct p9_fid *v9fs_fid_find(struct dentry *dentry, u32 uid, int any)
{
struct v9fs_dentry *dent;
struct p9_fid *fid, *ret;
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p) uid %d any %d\n",
dentry->d_iname, dentry, uid, any);
dent = (struct v9fs_dentry *) dentry->d_fsdata;
ret = NULL;
if (dent) {
spin_lock(&dent->lock);
list_for_each_entry(fid, &dent->fidlist, dlist) {
if (any || fid->uid == uid) {
ret = fid;
break;
}
}
spin_unlock(&dent->lock);
}
return ret;
}
/**
* v9fs_fid_lookup - lookup for a fid, try to walk if not found
* @dentry: dentry to look for fid in
*
* find a fid in the dentry, obtain its semaphore and return a reference to it.
* code calling lookup is responsible for releasing lock
*
* TODO: only match fids that have the same uid as current user
*
* Look for a fid in the specified dentry for the current user.
* If no fid is found, try to create one walking from a fid from the parent
* dentry (if it has one), or the root dentry. If the user haven't accessed
* the fs yet, attach now and walk from the root.
*/
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
{
struct v9fs_dentry *dent;
int i, n, l, clone, any, access;
u32 uid;
struct p9_fid *fid;
struct dentry *d, *ds;
struct v9fs_session_info *v9ses;
char **wnames, *uname;
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
dent = dentry->d_fsdata;
if (dent)
fid = list_entry(dent->fidlist.next, struct p9_fid, dlist);
else
fid = ERR_PTR(-EBADF);
v9ses = v9fs_inode2v9ses(dentry->d_inode);
access = v9ses->flags & V9FS_ACCESS_MASK;
switch (access) {
case V9FS_ACCESS_SINGLE:
case V9FS_ACCESS_USER:
uid = current->fsuid;
any = 0;
break;
P9_DPRINTK(P9_DEBUG_VFS, " fid: %p\n", fid);
case V9FS_ACCESS_ANY:
uid = v9ses->uid;
any = 1;
break;
default:
uid = ~0;
any = 0;
break;
}
fid = v9fs_fid_find(dentry, uid, any);
if (fid)
return fid;
ds = dentry->d_parent;
fid = v9fs_fid_find(ds, uid, any);
if (!fid) { /* walk from the root */
n = 0;
for (ds = dentry; !IS_ROOT(ds); ds = ds->d_parent)
n++;
fid = v9fs_fid_find(ds, uid, any);
if (!fid) { /* the user is not attached to the fs yet */
if (access == V9FS_ACCESS_SINGLE)
return ERR_PTR(-EPERM);
if (v9fs_extended(v9ses))
uname = NULL;
else
uname = v9ses->uname;
fid = p9_client_attach(v9ses->clnt, NULL, uname, uid,
v9ses->aname);
if (IS_ERR(fid))
return fid;
v9fs_fid_add(ds, fid);
}
} else /* walk from the parent */
n = 1;
if (ds == dentry)
return fid;
wnames = kmalloc(sizeof(char *) * n, GFP_KERNEL);
if (!wnames)
return ERR_PTR(-ENOMEM);
for (d = dentry, i = n; i >= 0; i--, d = d->d_parent)
wnames[i] = (char *) d->d_name.name;
clone = 1;
i = 0;
while (i < n) {
l = min(n - i, P9_MAXWELEM);
fid = p9_client_walk(fid, l, &wnames[i], clone);
if (!fid) {
kfree(wnames);
return fid;
}
i += l;
clone = 0;
}
kfree(wnames);
v9fs_fid_add(dentry, fid);
return fid;
}
/**
* v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and
* release it
* @dentry: dentry to look for fid in
*
* find a fid in the dentry and then clone to a new private fid
*
* TODO: only match fids that have the same uid as current user
*
*/
struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
{
struct p9_fid *ofid, *fid;
struct p9_fid *fid, *ret;
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
ofid = v9fs_fid_lookup(dentry);
if (IS_ERR(ofid))
return ofid;
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return fid;
fid = p9_client_walk(ofid, 0, NULL, 1);
return fid;
ret = p9_client_walk(fid, 0, NULL, 1);
return ret;
}

187
fs/9p/v9fs.c
View File

@ -38,56 +38,41 @@
/*
* Option Parsing (code inspired by NFS code)
*
* NOTE: each transport will parse its own options
*/
enum {
/* Options that take integer arguments */
Opt_debug, Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid,
Opt_rfdno, Opt_wfdno,
Opt_debug, Opt_msize, Opt_dfltuid, Opt_dfltgid, Opt_afid,
/* String options */
Opt_uname, Opt_remotename,
Opt_uname, Opt_remotename, Opt_trans,
/* Options that take no arguments */
Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd, Opt_pci,
Opt_legacy, Opt_nodevmap,
/* Cache options */
Opt_cache_loose,
/* Access options */
Opt_access,
/* Error token */
Opt_err
};
static match_table_t tokens = {
{Opt_debug, "debug=%x"},
{Opt_port, "port=%u"},
{Opt_msize, "msize=%u"},
{Opt_uid, "uid=%u"},
{Opt_gid, "gid=%u"},
{Opt_dfltuid, "dfltuid=%u"},
{Opt_dfltgid, "dfltgid=%u"},
{Opt_afid, "afid=%u"},
{Opt_rfdno, "rfdno=%u"},
{Opt_wfdno, "wfdno=%u"},
{Opt_uname, "uname=%s"},
{Opt_remotename, "aname=%s"},
{Opt_unix, "proto=unix"},
{Opt_tcp, "proto=tcp"},
{Opt_fd, "proto=fd"},
#ifdef CONFIG_PCI_9P
{Opt_pci, "proto=pci"},
#endif
{Opt_tcp, "tcp"},
{Opt_unix, "unix"},
{Opt_fd, "fd"},
{Opt_trans, "trans=%s"},
{Opt_legacy, "noextend"},
{Opt_nodevmap, "nodevmap"},
{Opt_cache_loose, "cache=loose"},
{Opt_cache_loose, "loose"},
{Opt_access, "access=%s"},
{Opt_err, NULL}
};
extern struct p9_transport *p9pci_trans_create(void);
/*
* Parse option string.
*/
/**
* v9fs_parse_options - parse mount options into session structure
* @options: options string passed from mount
@ -95,23 +80,21 @@ extern struct p9_transport *p9pci_trans_create(void);
*
*/
static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
static void v9fs_parse_options(struct v9fs_session_info *v9ses)
{
char *p;
char *options = v9ses->options;
substring_t args[MAX_OPT_ARGS];
char *p;
int option;
int ret;
char *s, *e;
/* setup defaults */
v9ses->port = V9FS_PORT;
v9ses->maxdata = 9000;
v9ses->proto = PROTO_TCP;
v9ses->extended = 1;
v9ses->maxdata = 8192;
v9ses->afid = ~0;
v9ses->debug = 0;
v9ses->rfdno = ~0;
v9ses->wfdno = ~0;
v9ses->cache = 0;
v9ses->trans = v9fs_default_trans();
if (!options)
return;
@ -135,47 +118,29 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
p9_debug_level = option;
#endif
break;
case Opt_port:
v9ses->port = option;
break;
case Opt_msize:
v9ses->maxdata = option;
break;
case Opt_uid:
v9ses->uid = option;
case Opt_dfltuid:
v9ses->dfltuid = option;
break;
case Opt_gid:
v9ses->gid = option;
case Opt_dfltgid:
v9ses->dfltgid = option;
break;
case Opt_afid:
v9ses->afid = option;
break;
case Opt_rfdno:
v9ses->rfdno = option;
break;
case Opt_wfdno:
v9ses->wfdno = option;
break;
case Opt_tcp:
v9ses->proto = PROTO_TCP;
break;
case Opt_unix:
v9ses->proto = PROTO_UNIX;
break;
case Opt_pci:
v9ses->proto = PROTO_PCI;
break;
case Opt_fd:
v9ses->proto = PROTO_FD;
case Opt_trans:
v9ses->trans = v9fs_match_trans(&args[0]);
break;
case Opt_uname:
match_strcpy(v9ses->name, &args[0]);
match_strcpy(v9ses->uname, &args[0]);
break;
case Opt_remotename:
match_strcpy(v9ses->remotename, &args[0]);
match_strcpy(v9ses->aname, &args[0]);
break;
case Opt_legacy:
v9ses->extended = 0;
v9ses->flags &= ~V9FS_EXTENDED;
break;
case Opt_nodevmap:
v9ses->nodev = 1;
@ -183,6 +148,22 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
case Opt_cache_loose:
v9ses->cache = CACHE_LOOSE;
break;
case Opt_access:
s = match_strdup(&args[0]);
v9ses->flags &= ~V9FS_ACCESS_MASK;
if (strcmp(s, "user") == 0)
v9ses->flags |= V9FS_ACCESS_USER;
else if (strcmp(s, "any") == 0)
v9ses->flags |= V9FS_ACCESS_ANY;
else {
v9ses->flags |= V9FS_ACCESS_SINGLE;
v9ses->uid = simple_strtol(s, &e, 10);
if (*e != '\0')
v9ses->uid = ~0;
}
break;
default:
continue;
}
@ -201,56 +182,46 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
const char *dev_name, char *data)
{
int retval = -EINVAL;
struct p9_transport *trans;
struct p9_trans *trans = NULL;
struct p9_fid *fid;
v9ses->name = __getname();
if (!v9ses->name)
v9ses->uname = __getname();
if (!v9ses->uname)
return ERR_PTR(-ENOMEM);
v9ses->remotename = __getname();
if (!v9ses->remotename) {
__putname(v9ses->name);
v9ses->aname = __getname();
if (!v9ses->aname) {
__putname(v9ses->uname);
return ERR_PTR(-ENOMEM);
}
strcpy(v9ses->name, V9FS_DEFUSER);
strcpy(v9ses->remotename, V9FS_DEFANAME);
v9ses->flags = V9FS_EXTENDED | V9FS_ACCESS_USER;
strcpy(v9ses->uname, V9FS_DEFUSER);
strcpy(v9ses->aname, V9FS_DEFANAME);
v9ses->uid = ~0;
v9ses->dfltuid = V9FS_DEFUID;
v9ses->dfltgid = V9FS_DEFGID;
v9ses->options = kstrdup(data, GFP_KERNEL);
v9fs_parse_options(v9ses);
v9fs_parse_options(data, v9ses);
switch (v9ses->proto) {
case PROTO_TCP:
trans = p9_trans_create_tcp(dev_name, v9ses->port);
break;
case PROTO_UNIX:
trans = p9_trans_create_unix(dev_name);
*v9ses->remotename = 0;
break;
case PROTO_FD:
trans = p9_trans_create_fd(v9ses->rfdno, v9ses->wfdno);
*v9ses->remotename = 0;
break;
#ifdef CONFIG_PCI_9P
case PROTO_PCI:
trans = p9pci_trans_create();
*v9ses->remotename = 0;
break;
#endif
default:
printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto);
retval = -ENOPROTOOPT;
if (v9ses->trans == NULL) {
retval = -EPROTONOSUPPORT;
P9_DPRINTK(P9_DEBUG_ERROR,
"No transport defined or default transport\n");
goto error;
};
}
trans = v9ses->trans->create(dev_name, v9ses->options);
if (IS_ERR(trans)) {
retval = PTR_ERR(trans);
trans = NULL;
goto error;
}
if ((v9ses->maxdata+P9_IOHDRSZ) > v9ses->trans->maxsize)
v9ses->maxdata = v9ses->trans->maxsize-P9_IOHDRSZ;
v9ses->clnt = p9_client_create(trans, v9ses->maxdata + P9_IOHDRSZ,
v9ses->extended);
v9ses->clnt = p9_client_create(trans, v9ses->maxdata+P9_IOHDRSZ,
v9fs_extended(v9ses));
if (IS_ERR(v9ses->clnt)) {
retval = PTR_ERR(v9ses->clnt);
@ -259,8 +230,20 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
goto error;
}
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->name,
v9ses->remotename);
if (!v9ses->clnt->dotu)
v9ses->flags &= ~V9FS_EXTENDED;
/* for legacy mode, fall back to V9FS_ACCESS_ANY */
if (!v9fs_extended(v9ses) &&
((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
v9ses->flags &= ~V9FS_ACCESS_MASK;
v9ses->flags |= V9FS_ACCESS_ANY;
v9ses->uid = ~0;
}
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0,
v9ses->aname);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
@ -268,6 +251,11 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
goto error;
}
if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
fid->uid = v9ses->uid;
else
fid->uid = ~0;
return fid;
error:
@ -288,8 +276,9 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
v9ses->clnt = NULL;
}
__putname(v9ses->name);
__putname(v9ses->remotename);
__putname(v9ses->uname);
__putname(v9ses->aname);
kfree(v9ses->options);
}
/**
@ -311,7 +300,7 @@ extern int v9fs_error_init(void);
static int __init init_v9fs(void)
{
printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
/* TODO: Setup list of registered trasnport modules */
return register_filesystem(&v9fs_fs_type);
}

38
fs/9p/v9fs.h
View File

@ -29,31 +29,30 @@
struct v9fs_session_info {
/* options */
unsigned int maxdata;
unsigned char extended; /* set to 1 if we are using UNIX extensions */
unsigned char flags; /* session flags */
unsigned char nodev; /* set to 1 if no disable device mapping */
unsigned short port; /* port to connect to */
unsigned short debug; /* debug level */
unsigned short proto; /* protocol to use */
unsigned int afid; /* authentication fid */
unsigned int rfdno; /* read file descriptor number */
unsigned int wfdno; /* write file descriptor number */
unsigned int cache; /* cache mode */
char *name; /* user name to mount as */
char *remotename; /* name of remote hierarchy being mounted */
unsigned int uid; /* default uid/muid for legacy support */
unsigned int gid; /* default gid for legacy support */
char *options; /* copy of mount options */
char *uname; /* user name to mount as */
char *aname; /* name of remote hierarchy being mounted */
unsigned int dfltuid; /* default uid/muid for legacy support */
unsigned int dfltgid; /* default gid for legacy support */
u32 uid; /* if ACCESS_SINGLE, the uid that has access */
struct p9_trans_module *trans; /* 9p transport */
struct p9_client *clnt; /* 9p client */
struct dentry *debugfs_dir;
};
/* possible values of ->proto */
/* session flags */
enum {
PROTO_TCP,
PROTO_UNIX,
PROTO_FD,
PROTO_PCI,
V9FS_EXTENDED = 0x01, /* 9P2000.u */
V9FS_ACCESS_MASK = 0x06, /* access mask */
V9FS_ACCESS_SINGLE = 0x02, /* only one user can access the files */
V9FS_ACCESS_USER = 0x04, /* attache per user */
V9FS_ACCESS_ANY = 0x06, /* use the same attach for all users */
};
/* possible values of ->cache */
@ -73,11 +72,18 @@ void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997
/* other default globals */
#define V9FS_PORT 564
#define V9FS_PORT 564
#define V9FS_DEFUSER "nobody"
#define V9FS_DEFANAME ""
#define V9FS_DEFUID (-2)
#define V9FS_DEFGID (-2)
static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
{
return (inode->i_sb->s_fs_info);
}
static inline int v9fs_extended(struct v9fs_session_info *v9ses)
{
return v9ses->flags & V9FS_EXTENDED;
}

6
fs/9p/vfs_file.c
View File

@ -162,15 +162,17 @@ v9fs_file_write(struct file *filp, const char __user * data,
fid = filp->private_data;
ret = p9_client_uwrite(fid, data, *offset, count);
if (ret > 0)
if (ret > 0) {
invalidate_inode_pages2_range(inode->i_mapping, *offset,
*offset+ret);
*offset += ret;
}
if (*offset > inode->i_size) {
inode->i_size = *offset;
inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
}
invalidate_inode_pages2(inode->i_mapping);
return ret;
}

50
fs/9p/vfs_inode.c
View File

@ -59,7 +59,7 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
res = mode & 0777;
if (S_ISDIR(mode))
res |= P9_DMDIR;
if (v9ses->extended) {
if (v9fs_extended(v9ses)) {
if (S_ISLNK(mode))
res |= P9_DMSYMLINK;
if (v9ses->nodev == 0) {
@ -99,21 +99,21 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
if ((mode & P9_DMDIR) == P9_DMDIR)
res |= S_IFDIR;
else if ((mode & P9_DMSYMLINK) && (v9ses->extended))
else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses)))
res |= S_IFLNK;
else if ((mode & P9_DMSOCKET) && (v9ses->extended)
else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses))
&& (v9ses->nodev == 0))
res |= S_IFSOCK;
else if ((mode & P9_DMNAMEDPIPE) && (v9ses->extended)
else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses))
&& (v9ses->nodev == 0))
res |= S_IFIFO;
else if ((mode & P9_DMDEVICE) && (v9ses->extended)
else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses))
&& (v9ses->nodev == 0))
res |= S_IFBLK;
else
res |= S_IFREG;
if (v9ses->extended) {
if (v9fs_extended(v9ses)) {
if ((mode & P9_DMSETUID) == P9_DMSETUID)
res |= S_ISUID;
@ -214,7 +214,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
case S_IFBLK:
case S_IFCHR:
case S_IFSOCK:
if(!v9ses->extended) {
if (!v9fs_extended(v9ses)) {
P9_DPRINTK(P9_DEBUG_ERROR,
"special files without extended mode\n");
return ERR_PTR(-EINVAL);
@ -227,7 +227,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
inode->i_fop = &v9fs_file_operations;
break;
case S_IFLNK:
if(!v9ses->extended) {
if (!v9fs_extended(v9ses)) {
P9_DPRINTK(P9_DEBUG_ERROR,
"extended modes used w/o 9P2000.u\n");
return ERR_PTR(-EINVAL);
@ -236,7 +236,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
break;
case S_IFDIR:
inc_nlink(inode);
if(v9ses->extended)
if (v9fs_extended(v9ses))
inode->i_op = &v9fs_dir_inode_operations_ext;
else
inode->i_op = &v9fs_dir_inode_operations;
@ -364,7 +364,7 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
file_inode = file->d_inode;
v9ses = v9fs_inode2v9ses(file_inode);
v9fid = v9fs_fid_clone(file);
if(IS_ERR(v9fid))
if (IS_ERR(v9fid))
return PTR_ERR(v9fid);
return p9_client_remove(v9fid);
@ -398,7 +398,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
fid = NULL;
name = (char *) dentry->d_name.name;
dfid = v9fs_fid_clone(dentry->d_parent);
if(IS_ERR(dfid)) {
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
dfid = NULL;
goto error;
@ -432,7 +432,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
goto error;
}
if(v9ses->cache)
if (v9ses->cache)
dentry->d_op = &v9fs_cached_dentry_operations;
else
dentry->d_op = &v9fs_dentry_operations;
@ -593,7 +593,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
if (result < 0)
goto error;
if((fid->qid.version)&&(v9ses->cache))
if ((fid->qid.version) && (v9ses->cache))
dentry->d_op = &v9fs_cached_dentry_operations;
else
dentry->d_op = &v9fs_dentry_operations;
@ -658,17 +658,17 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
old_inode = old_dentry->d_inode;
v9ses = v9fs_inode2v9ses(old_inode);
oldfid = v9fs_fid_lookup(old_dentry);
if(IS_ERR(oldfid))
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
olddirfid = v9fs_fid_clone(old_dentry->d_parent);
if(IS_ERR(olddirfid)) {
if (IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
goto done;
}
newdirfid = v9fs_fid_clone(new_dentry->d_parent);
if(IS_ERR(newdirfid)) {
if (IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
goto clunk_olddir;
}
@ -682,7 +682,7 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
}
v9fs_blank_wstat(&wstat);
wstat.muid = v9ses->name;
wstat.muid = v9ses->uname;
wstat.name = (char *) new_dentry->d_name.name;
retval = p9_client_wstat(oldfid, &wstat);
@ -768,7 +768,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
if (iattr->ia_valid & ATTR_SIZE)
wstat.length = iattr->ia_size;
if (v9ses->extended) {
if (v9fs_extended(v9ses)) {
if (iattr->ia_valid & ATTR_UID)
wstat.n_uid = iattr->ia_uid;
@ -805,10 +805,10 @@ v9fs_stat2inode(struct p9_stat *stat, struct inode *inode,
inode->i_mtime.tv_sec = stat->mtime;
inode->i_ctime.tv_sec = stat->mtime;
inode->i_uid = v9ses->uid;
inode->i_gid = v9ses->gid;
inode->i_uid = v9ses->dfltuid;
inode->i_gid = v9ses->dfltgid;
if (v9ses->extended) {
if (v9fs_extended(v9ses)) {
inode->i_uid = stat->n_uid;
inode->i_gid = stat->n_gid;
}
@ -887,10 +887,10 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
retval = -EPERM;
v9ses = v9fs_inode2v9ses(dentry->d_inode);
fid = v9fs_fid_lookup(dentry);
if(IS_ERR(fid))
if (IS_ERR(fid))
return PTR_ERR(fid);
if (!v9ses->extended)
if (!v9fs_extended(v9ses))
return -EBADF;
st = p9_client_stat(fid);
@ -1011,7 +1011,7 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
struct p9_fid *fid;
v9ses = v9fs_inode2v9ses(dir);
if (!v9ses->extended) {
if (!v9fs_extended(v9ses)) {
P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
return -EPERM;
}
@ -1070,7 +1070,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
old_dentry->d_name.name);
oldfid = v9fs_fid_clone(old_dentry);
if(IS_ERR(oldfid))
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
name = __getname();

19
fs/9p/vfs_super.c
View File

@ -216,24 +216,7 @@ static int v9fs_show_options(struct seq_file *m, struct vfsmount *mnt)
{
struct v9fs_session_info *v9ses = mnt->mnt_sb->s_fs_info;
if (v9ses->debug != 0)
seq_printf(m, ",debug=%x", v9ses->debug);
if (v9ses->port != V9FS_PORT)
seq_printf(m, ",port=%u", v9ses->port);
if (v9ses->maxdata != 9000)
seq_printf(m, ",msize=%u", v9ses->maxdata);
if (v9ses->afid != ~0)
seq_printf(m, ",afid=%u", v9ses->afid);
if (v9ses->proto == PROTO_UNIX)
seq_puts(m, ",proto=unix");
if (v9ses->extended == 0)
seq_puts(m, ",noextend");
if (v9ses->nodev == 1)
seq_puts(m, ",nodevmap");
seq_printf(m, ",name=%s", v9ses->name);
seq_printf(m, ",aname=%s", v9ses->remotename);
seq_printf(m, ",uid=%u", v9ses->uid);
seq_printf(m, ",gid=%u", v9ses->gid);
seq_printf(m, "%s", v9ses->options);
return 0;
}

21
include/net/9p/9p.h
View File

@ -216,6 +216,7 @@ struct p9_tauth {
u32 afid;
struct p9_str uname;
struct p9_str aname;
u32 n_uname; /* 9P2000.u extensions */
};
struct p9_rauth {
@ -239,6 +240,7 @@ struct p9_tattach {
u32 afid;
struct p9_str uname;
struct p9_str aname;
u32 n_uname; /* 9P2000.u extensions */
};
struct p9_rattach {
@ -382,8 +384,9 @@ int p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *fc, int dotu);
void p9_set_tag(struct p9_fcall *fc, u16 tag);
struct p9_fcall *p9_create_tversion(u32 msize, char *version);
struct p9_fcall *p9_create_tattach(u32 fid, u32 afid, char *uname,
char *aname);
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname);
char *aname, u32 n_uname, int dotu);
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname,
u32 n_uname, int dotu);
struct p9_fcall *p9_create_tflush(u16 oldtag);
struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
char **wnames);
@ -412,18 +415,4 @@ int p9_idpool_check(int id, struct p9_idpool *p);
int p9_error_init(void);
int p9_errstr2errno(char *, int);
#ifdef CONFIG_SYSCTL
int __init p9_sysctl_register(void);
void __exit p9_sysctl_unregister(void);
#else
static inline int p9_sysctl_register(void)
{
return 0;
}
static inline void p9_sysctl_unregister(void)
{
}
#endif
#endif /* NET_9P_H */

9
include/net/9p/client.h
View File

@ -29,7 +29,7 @@ struct p9_client {
spinlock_t lock; /* protect client structure */
int msize;
unsigned char dotu;
struct p9_transport *trans;
struct p9_trans *trans;
struct p9_conn *conn;
struct p9_idpool *fidpool;
@ -52,13 +52,14 @@ struct p9_fid {
struct list_head dlist; /* list of all fids attached to a dentry */
};
struct p9_client *p9_client_create(struct p9_transport *trans, int msize,
struct p9_client *p9_client_create(struct p9_trans *trans, int msize,
int dotu);
void p9_client_destroy(struct p9_client *clnt);
void p9_client_disconnect(struct p9_client *clnt);
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
char *uname, char *aname);
struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname);
char *uname, u32 n_uname, char *aname);
struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname,
u32 n_uname, char *aname);
struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
int clone);
int p9_client_open(struct p9_fid *fid, int mode);

4
include/net/9p/conn.h
View File

@ -42,8 +42,8 @@ struct p9_req;
*/
typedef void (*p9_conn_req_callback)(struct p9_req *req, void *a);
struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
unsigned char *dotu);
struct p9_conn *p9_conn_create(struct p9_trans *trans, int msize,
unsigned char *dotu);
void p9_conn_destroy(struct p9_conn *);
int p9_conn_rpc(struct p9_conn *m, struct p9_fcall *tc, struct p9_fcall **rc);

29
include/net/9p/transport.h
View File

@ -26,24 +26,31 @@
#ifndef NET_9P_TRANSPORT_H
#define NET_9P_TRANSPORT_H
enum p9_transport_status {
enum p9_trans_status {
Connected,
Disconnected,
Hung,
};
struct p9_transport {
enum p9_transport_status status;
struct p9_trans {
enum p9_trans_status status;
void *priv;
int (*write) (struct p9_transport *, void *, int);
int (*read) (struct p9_transport *, void *, int);
void (*close) (struct p9_transport *);
unsigned int (*poll)(struct p9_transport *, struct poll_table_struct *);
int (*write) (struct p9_trans *, void *, int);
int (*read) (struct p9_trans *, void *, int);
void (*close) (struct p9_trans *);
unsigned int (*poll)(struct p9_trans *, struct poll_table_struct *);
};
struct p9_transport *p9_trans_create_tcp(const char *addr, int port);
struct p9_transport *p9_trans_create_unix(const char *addr);
struct p9_transport *p9_trans_create_fd(int rfd, int wfd);
struct p9_trans_module {
struct list_head list;
char *name; /* name of transport */
int maxsize; /* max message size of transport */
int def; /* this transport should be default */
struct p9_trans * (*create)(const char *devname, char *options);
};
void v9fs_register_trans(struct p9_trans_module *m);
struct p9_trans_module *v9fs_match_trans(const substring_t *name);
struct p9_trans_module *v9fs_default_trans(void);
#endif /* NET_9P_TRANSPORT_H */

10
net/9p/Kconfig
View File

@ -13,6 +13,16 @@ menuconfig NET_9P
If unsure, say N.
config NET_9P_FD
depends on NET_9P
default y if NET_9P
tristate "9P File Descriptor Transports (Experimental)"
help
This builds support for file descriptor transports for 9p
which includes support for TCP/IP, named pipes, or passed
file descriptors. TCP/IP is the default transport for 9p,
so if you are going to use 9p, you'll likely want this.
config NET_9P_DEBUG
bool "Debug information"
depends on NET_9P

5
net/9p/Makefile
View File

@ -1,8 +1,8 @@
obj-$(CONFIG_NET_9P) := 9pnet.o
obj-$(CONFIG_NET_9P_FD) += 9pnet_fd.o
9pnet-objs := \
mod.o \
trans_fd.o \
mux.o \
client.o \
conv.o \
@ -10,4 +10,5 @@ obj-$(CONFIG_NET_9P) := 9pnet.o
fcprint.o \
util.o \
9pnet-$(CONFIG_SYSCTL) += sysctl.o
9pnet_fd-objs := \
trans_fd.o \

13
net/9p/client.c
View File

@ -30,6 +30,7 @@
#include <linux/sched.h>
#include <linux/uaccess.h>
#include <net/9p/9p.h>
#include <linux/parser.h>
#include <net/9p/transport.h>
#include <net/9p/conn.h>
#include <net/9p/client.h>
@ -38,7 +39,7 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt);
static void p9_fid_destroy(struct p9_fid *fid);
static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu);
struct p9_client *p9_client_create(struct p9_transport *trans, int msize,
struct p9_client *p9_client_create(struct p9_trans *trans, int msize,
int dotu)
{
int err, n;
@ -146,7 +147,7 @@ void p9_client_disconnect(struct p9_client *clnt)
EXPORT_SYMBOL(p9_client_disconnect);
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
char *uname, char *aname)
char *uname, u32 n_uname, char *aname)
{
int err;
struct p9_fcall *tc, *rc;
@ -165,7 +166,8 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
goto error;
}
tc = p9_create_tattach(fid->fid, afid?afid->fid:P9_NOFID, uname, aname);
tc = p9_create_tattach(fid->fid, afid?afid->fid:P9_NOFID, uname, aname,
n_uname, clnt->dotu);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
@ -190,7 +192,8 @@ error:
}
EXPORT_SYMBOL(p9_client_attach);
struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname)
struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname,
u32 n_uname, char *aname)
{
int err;
struct p9_fcall *tc, *rc;
@ -209,7 +212,7 @@ struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname)
goto error;
}
tc = p9_create_tauth(fid->fid, uname, aname);
tc = p9_create_tauth(fid->fid, uname, aname, n_uname, clnt->dotu);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;

32
net/9p/conv.c
View File

@ -547,7 +547,8 @@ error:
}
EXPORT_SYMBOL(p9_create_tversion);
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname)
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname,
u32 n_uname, int dotu)
{
int size;
struct p9_fcall *fc;
@ -555,7 +556,16 @@ struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname)
struct cbuf *bufp = &buffer;
/* afid[4] uname[s] aname[s] */
size = 4 + 2 + strlen(uname) + 2 + strlen(aname);
size = 4 + 2 + 2;
if (uname)
size += strlen(uname);
if (aname)
size += strlen(aname);
if (dotu)
size += 4; /* n_uname */
fc = p9_create_common(bufp, size, P9_TAUTH);
if (IS_ERR(fc))
goto error;
@ -563,6 +573,8 @@ struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname)
p9_put_int32(bufp, afid, &fc->params.tauth.afid);
p9_put_str(bufp, uname, &fc->params.tauth.uname);
p9_put_str(bufp, aname, &fc->params.tauth.aname);
if (dotu)
p9_put_int32(bufp, n_uname, &fc->params.tauth.n_uname);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -574,7 +586,8 @@ error:
EXPORT_SYMBOL(p9_create_tauth);
struct p9_fcall *
p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname,
u32 n_uname, int dotu)
{
int size;
struct p9_fcall *fc;
@ -582,7 +595,16 @@ p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
struct cbuf *bufp = &buffer;
/* fid[4] afid[4] uname[s] aname[s] */
size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname);
size = 4 + 4 + 2 + 2;
if (uname)
size += strlen(uname);
if (aname)
size += strlen(aname);
if (dotu)
size += 4; /* n_uname */
fc = p9_create_common(bufp, size, P9_TATTACH);
if (IS_ERR(fc))
goto error;
@ -591,6 +613,8 @@ p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
p9_put_int32(bufp, afid, &fc->params.tattach.afid);
p9_put_str(bufp, uname, &fc->params.tattach.uname);
p9_put_str(bufp, aname, &fc->params.tattach.aname);
if (dotu)
p9_put_int32(bufp, n_uname, &fc->params.tattach.n_uname);
error:
return fc;

71
net/9p/mod.c
View File

@ -27,6 +27,10 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <net/9p/9p.h>
#include <linux/fs.h>
#include <linux/parser.h>
#include <net/9p/transport.h>
#include <linux/list.h>
#ifdef CONFIG_NET_9P_DEBUG
unsigned int p9_debug_level = 0; /* feature-rific global debug level */
@ -37,8 +41,64 @@ MODULE_PARM_DESC(debug, "9P debugging level");
extern int p9_mux_global_init(void);
extern void p9_mux_global_exit(void);
extern int p9_sysctl_register(void);
extern void p9_sysctl_unregister(void);
/*
* Dynamic Transport Registration Routines
*
*/
static LIST_HEAD(v9fs_trans_list);
static struct p9_trans_module *v9fs_default_transport;
/**
* v9fs_register_trans - register a new transport with 9p
* @m - structure describing the transport module and entry points
*
*/
void v9fs_register_trans(struct p9_trans_module *m)
{
list_add_tail(&m->list, &v9fs_trans_list);
if (m->def)
v9fs_default_transport = m;
}
EXPORT_SYMBOL(v9fs_register_trans);
/**
* v9fs_match_trans - match transport versus registered transports
* @arg: string identifying transport
*
*/
struct p9_trans_module *v9fs_match_trans(const substring_t *name)
{
struct list_head *p;
struct p9_trans_module *t = NULL;
list_for_each(p, &v9fs_trans_list) {
t = list_entry(p, struct p9_trans_module, list);
if (strncmp(t->name, name->from, name->to-name->from) == 0)
break;
}
return t;
}
EXPORT_SYMBOL(v9fs_match_trans);
/**
* v9fs_default_trans - returns pointer to default transport
*
*/
struct p9_trans_module *v9fs_default_trans(void)
{
if (v9fs_default_transport)
return v9fs_default_transport;
else if (!list_empty(&v9fs_trans_list))
return list_first_entry(&v9fs_trans_list,
struct p9_trans_module, list);
else
return NULL;
}
EXPORT_SYMBOL(v9fs_default_trans);
/**
* v9fs_init - Initialize module
@ -56,12 +116,6 @@ static int __init init_p9(void)
return ret;
}
ret = p9_sysctl_register();
if (ret) {
printk(KERN_WARNING "9p: registering sysctl failed\n");
return ret;
}
return ret;
}
@ -72,7 +126,6 @@ static int __init init_p9(void)
static void __exit exit_p9(void)
{
p9_sysctl_unregister();
p9_mux_global_exit();
}

5
net/9p/mux.c
View File

@ -31,6 +31,7 @@
#include <linux/idr.h>
#include <linux/mutex.h>
#include <net/9p/9p.h>
#include <linux/parser.h>
#include <net/9p/transport.h>
#include <net/9p/conn.h>
@ -71,7 +72,7 @@ struct p9_conn {
struct p9_mux_poll_task *poll_task;
int msize;
unsigned char *extended;
struct p9_transport *trans;
struct p9_trans *trans;
struct p9_idpool *tagpool;
int err;
wait_queue_head_t equeue;
@ -271,7 +272,7 @@ static void p9_mux_poll_stop(struct p9_conn *m)
* @msize - maximum message size
* @extended - pointer to the extended flag
*/
struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
struct p9_conn *p9_conn_create(struct p9_trans *trans, int msize,
unsigned char *extended)
{
int i, n;

81
net/9p/sysctl.c
View File

@ -1,81 +0,0 @@
/*
* net/9p/sysctl.c
*
* 9P sysctl interface
*
* Copyright (C) 2007 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 version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to:
* Free Software Foundation
* 51 Franklin Street, Fifth Floor
* Boston, MA 02111-1301 USA
*
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <net/9p/9p.h>
static struct ctl_table p9_table[] = {
#ifdef CONFIG_NET_9P_DEBUG
{
.ctl_name = CTL_UNNUMBERED,
.procname = "debug",
.data = &p9_debug_level,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
#endif
{},
};
static struct ctl_table p9_net_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "9p",
.maxlen = 0,
.mode = 0555,
.child = p9_table,
},
{},
};
static struct ctl_table p9_ctl_table[] = {
{
.ctl_name = CTL_NET,
.procname = "net",
.maxlen = 0,
.mode = 0555,
.child = p9_net_table,
},
{},
};
static struct ctl_table_header *p9_table_header;
int __init p9_sysctl_register(void)
{
p9_table_header = register_sysctl_table(p9_ctl_table);
if (!p9_table_header)
return -ENOMEM;
return 0;
}
void __exit p9_sysctl_unregister(void)
{
unregister_sysctl_table(p9_table_header);
}

437
net/9p/trans_fd.c
View File

@ -5,7 +5,7 @@
*
* Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
* Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2004-2007 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
*
* This program is free software; you can redistribute it and/or modify
@ -36,183 +36,90 @@
#include <linux/inet.h>
#include <linux/idr.h>
#include <linux/file.h>
#include <linux/parser.h>
#include <net/9p/9p.h>
#include <net/9p/transport.h>
#define P9_PORT 564
#define MAX_SOCK_BUF (64*1024)
struct p9_fd_opts {
int rfd;
int wfd;
u16 port;
};
struct p9_trans_fd {
struct file *rd;
struct file *wr;
};
static int p9_socket_open(struct p9_transport *trans, struct socket *csocket);
static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd);
static int p9_fd_read(struct p9_transport *trans, void *v, int len);
static int p9_fd_write(struct p9_transport *trans, void *v, int len);
static unsigned int p9_fd_poll(struct p9_transport *trans,
struct poll_table_struct *pt);
static void p9_fd_close(struct p9_transport *trans);
/*
* Option Parsing (code inspired by NFS code)
* - a little lazy - parse all fd-transport options
*/
struct p9_transport *p9_trans_create_tcp(const char *addr, int port)
enum {
/* Options that take integer arguments */
Opt_port, Opt_rfdno, Opt_wfdno,
};
static match_table_t tokens = {
{Opt_port, "port=%u"},
{Opt_rfdno, "rfdno=%u"},
{Opt_wfdno, "wfdno=%u"},
};
/**
* v9fs_parse_options - parse mount options into session structure
* @options: options string passed from mount
* @v9ses: existing v9fs session information
*
*/
static void parse_opts(char *options, struct p9_fd_opts *opts)
{
int err;
struct p9_transport *trans;
struct socket *csocket;
struct sockaddr_in sin_server;
char *p;
substring_t args[MAX_OPT_ARGS];
int option;
int ret;
csocket = NULL;
trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
opts->port = P9_PORT;
opts->rfd = ~0;
opts->wfd = ~0;
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
if (!options)
return;
sin_server.sin_family = AF_INET;
sin_server.sin_addr.s_addr = in_aton(addr);
sin_server.sin_port = htons(port);
sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
if (!csocket) {
P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
err = -EIO;
goto error;
while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
ret = match_int(&args[0], &option);
if (ret < 0) {
P9_DPRINTK(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
continue;
}
switch (token) {
case Opt_port:
opts->port = option;
break;
case Opt_rfdno:
opts->rfd = option;
break;
case Opt_wfdno:
opts->wfd = option;
break;
default:
continue;
}
}
err = csocket->ops->connect(csocket,
(struct sockaddr *)&sin_server,
sizeof(struct sockaddr_in), 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_tcp: problem connecting socket to %s\n",
addr);
goto error;
}
err = p9_socket_open(trans, csocket);
if (err < 0)
goto error;
return trans;
error:
if (csocket)
sock_release(csocket);
kfree(trans);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_trans_create_tcp);
struct p9_transport *p9_trans_create_unix(const char *addr)
{
int err;
struct socket *csocket;
struct sockaddr_un sun_server;
struct p9_transport *trans;
csocket = NULL;
trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
if (strlen(addr) > UNIX_PATH_MAX) {
P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
addr);
err = -ENAMETOOLONG;
goto error;
}
sun_server.sun_family = PF_UNIX;
strcpy(sun_server.sun_path, addr);
sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
sizeof(struct sockaddr_un) - 1, 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_unix: problem connecting socket: %s: %d\n",
addr, err);
goto error;
}
err = p9_socket_open(trans, csocket);
if (err < 0)
goto error;
return trans;
error:
if (csocket)
sock_release(csocket);
kfree(trans);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_trans_create_unix);
struct p9_transport *p9_trans_create_fd(int rfd, int wfd)
{
int err;
struct p9_transport *trans;
if (rfd == ~0 || wfd == ~0) {
printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
return ERR_PTR(-ENOPROTOOPT);
}
trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
err = p9_fd_open(trans, rfd, wfd);
if (err < 0)
goto error;
return trans;
error:
kfree(trans);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_trans_create_fd);
static int p9_socket_open(struct p9_transport *trans, struct socket *csocket)
{
int fd, ret;
csocket->sk->sk_allocation = GFP_NOIO;
fd = sock_map_fd(csocket);
if (fd < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to map fd\n");
return fd;
}
ret = p9_fd_open(trans, fd, fd);
if (ret < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to open fd\n");
sockfd_put(csocket);
return ret;
}
((struct p9_trans_fd *)trans->priv)->rd->f_flags |= O_NONBLOCK;
return 0;
}
static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd)
static int p9_fd_open(struct p9_trans *trans, int rfd, int wfd)
{
struct p9_trans_fd *ts = kmalloc(sizeof(struct p9_trans_fd),
GFP_KERNEL);
@ -236,6 +143,29 @@ static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd)
return 0;
}
static int p9_socket_open(struct p9_trans *trans, struct socket *csocket)
{
int fd, ret;
csocket->sk->sk_allocation = GFP_NOIO;
fd = sock_map_fd(csocket);
if (fd < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to map fd\n");
return fd;
}
ret = p9_fd_open(trans, fd, fd);
if (ret < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to open fd\n");
sockfd_put(csocket);
return ret;
}
((struct p9_trans_fd *)trans->priv)->rd->f_flags |= O_NONBLOCK;
return 0;
}
/**
* p9_fd_read- read from a fd
* @v9ses: session information
@ -243,7 +173,7 @@ static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd)
* @len: size of receive buffer
*
*/
static int p9_fd_read(struct p9_transport *trans, void *v, int len)
static int p9_fd_read(struct p9_trans *trans, void *v, int len)
{
int ret;
struct p9_trans_fd *ts = NULL;
@ -270,7 +200,7 @@ static int p9_fd_read(struct p9_transport *trans, void *v, int len)
* @len: size of send buffer
*
*/
static int p9_fd_write(struct p9_transport *trans, void *v, int len)
static int p9_fd_write(struct p9_trans *trans, void *v, int len)
{
int ret;
mm_segment_t oldfs;
@ -297,7 +227,7 @@ static int p9_fd_write(struct p9_transport *trans, void *v, int len)
}
static unsigned int
p9_fd_poll(struct p9_transport *trans, struct poll_table_struct *pt)
p9_fd_poll(struct p9_trans *trans, struct poll_table_struct *pt)
{
int ret, n;
struct p9_trans_fd *ts = NULL;
@ -341,7 +271,7 @@ end:
* @trans: private socket structure
*
*/
static void p9_fd_close(struct p9_transport *trans)
static void p9_fd_close(struct p9_trans *trans)
{
struct p9_trans_fd *ts;
@ -361,3 +291,182 @@ static void p9_fd_close(struct p9_transport *trans)
kfree(ts);
}
static struct p9_trans *p9_trans_create_tcp(const char *addr, char *args)
{
int err;
struct p9_trans *trans;
struct socket *csocket;
struct sockaddr_in sin_server;
struct p9_fd_opts opts;
parse_opts(args, &opts);
csocket = NULL;
trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
sin_server.sin_family = AF_INET;
sin_server.sin_addr.s_addr = in_aton(addr);
sin_server.sin_port = htons(opts.port);
sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
if (!csocket) {
P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
err = -EIO;
goto error;
}
err = csocket->ops->connect(csocket,
(struct sockaddr *)&sin_server,
sizeof(struct sockaddr_in), 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_tcp: problem connecting socket to %s\n",
addr);
goto error;
}
err = p9_socket_open(trans, csocket);
if (err < 0)
goto error;
return trans;
error:
if (csocket)
sock_release(csocket);
kfree(trans);
return ERR_PTR(err);
}
static struct p9_trans *p9_trans_create_unix(const char *addr, char *args)
{
int err;
struct socket *csocket;
struct sockaddr_un sun_server;
struct p9_trans *trans;
csocket = NULL;
trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
if (strlen(addr) > UNIX_PATH_MAX) {
P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
addr);
err = -ENAMETOOLONG;
goto error;
}
sun_server.sun_family = PF_UNIX;
strcpy(sun_server.sun_path, addr);
sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
sizeof(struct sockaddr_un) - 1, 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_unix: problem connecting socket: %s: %d\n",
addr, err);
goto error;
}
err = p9_socket_open(trans, csocket);
if (err < 0)
goto error;
return trans;
error:
if (csocket)
sock_release(csocket);
kfree(trans);
return ERR_PTR(err);
}
static struct p9_trans *p9_trans_create_fd(const char *name, char *args)
{
int err;
struct p9_trans *trans;
struct p9_fd_opts opts;
parse_opts(args, &opts);
if (opts.rfd == ~0 || opts.wfd == ~0) {
printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
return ERR_PTR(-ENOPROTOOPT);
}
trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
err = p9_fd_open(trans, opts.rfd, opts.wfd);
if (err < 0)
goto error;
return trans;
error:
kfree(trans);
return ERR_PTR(err);
}
static struct p9_trans_module p9_tcp_trans = {
.name = "tcp",
.maxsize = MAX_SOCK_BUF,
.def = 1,
.create = p9_trans_create_tcp,
};
static struct p9_trans_module p9_unix_trans = {
.name = "unix",
.maxsize = MAX_SOCK_BUF,
.def = 0,
.create = p9_trans_create_unix,
};
static struct p9_trans_module p9_fd_trans = {
.name = "fd",
.maxsize = MAX_SOCK_BUF,
.def = 0,
.create = p9_trans_create_fd,
};
static int __init p9_trans_fd_init(void)
{
v9fs_register_trans(&p9_tcp_trans);
v9fs_register_trans(&p9_unix_trans);
v9fs_register_trans(&p9_fd_trans);
return 1;
}
static void __exit p9_trans_fd_exit(void) {
printk(KERN_ERR "Removal of 9p transports not implemented\n");
BUG();
}
module_init(p9_trans_fd_init);
module_exit(p9_trans_fd_exit);
MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
MODULE_LICENSE("GPL");