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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:
  net/9p: Fix the msize calculation.
  fs/9p: add 9P2000.L unlinkat operation
  fs/9p: add 9P2000.L renameat operation
  fs/9p: Always ask new inode in create
  fs/9p: Clean-up get_protocol_version() to use strcmp
  fs/9p: Fix invalid mount options/args
  fs/9p: When doing inode lookup compare qid details and inode mode bits.
  fs/9p: Fid is not valid after a failed clunk.
  net/9p: Remove structure not used in the code
  VirtIO can transfer VIRTQUEUE_NUM of pages.
  Fix the size of receive buffer packing onto VirtIO ring.
  9p: clean up packet dump code
  fs/9p: remove rename work around in 9p
  net/9p: fix client code to fail more gracefully on protocol error
This commit is contained in:
Linus Torvalds 2011-07-23 10:58:49 -07:00
parent 807094c0b1 c9ffb05ca5
commit 9d1c021355
13 changed files with 369 additions and 331 deletions
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20
fs/9p/cache.c
View File

@ -108,11 +108,10 @@ static uint16_t v9fs_cache_inode_get_key(const void *cookie_netfs_data,
void *buffer, uint16_t bufmax)
{
const struct v9fs_inode *v9inode = cookie_netfs_data;
memcpy(buffer, &v9inode->fscache_key->path,
sizeof(v9inode->fscache_key->path));
memcpy(buffer, &v9inode->qid.path, sizeof(v9inode->qid.path));
P9_DPRINTK(P9_DEBUG_FSC, "inode %p get key %llu", &v9inode->vfs_inode,
v9inode->fscache_key->path);
return sizeof(v9inode->fscache_key->path);
v9inode->qid.path);
return sizeof(v9inode->qid.path);
}
static void v9fs_cache_inode_get_attr(const void *cookie_netfs_data,
@ -129,11 +128,10 @@ static uint16_t v9fs_cache_inode_get_aux(const void *cookie_netfs_data,
void *buffer, uint16_t buflen)
{
const struct v9fs_inode *v9inode = cookie_netfs_data;
memcpy(buffer, &v9inode->fscache_key->version,
sizeof(v9inode->fscache_key->version));
memcpy(buffer, &v9inode->qid.version, sizeof(v9inode->qid.version));
P9_DPRINTK(P9_DEBUG_FSC, "inode %p get aux %u", &v9inode->vfs_inode,
v9inode->fscache_key->version);
return sizeof(v9inode->fscache_key->version);
v9inode->qid.version);
return sizeof(v9inode->qid.version);
}
static enum
@ -143,11 +141,11 @@ fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data,
{
const struct v9fs_inode *v9inode = cookie_netfs_data;
if (buflen != sizeof(v9inode->fscache_key->version))
if (buflen != sizeof(v9inode->qid.version))
return FSCACHE_CHECKAUX_OBSOLETE;
if (memcmp(buffer, &v9inode->fscache_key->version,
sizeof(v9inode->fscache_key->version)))
if (memcmp(buffer, &v9inode->qid.version,
sizeof(v9inode->qid.version)))
return FSCACHE_CHECKAUX_OBSOLETE;
return FSCACHE_CHECKAUX_OKAY;

9
fs/9p/cache.h
View File

@ -93,15 +93,6 @@ static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
BUG_ON(PageFsCache(page));
}
static inline void v9fs_fscache_set_key(struct inode *inode,
struct p9_qid *qid)
{
struct v9fs_inode *v9inode = V9FS_I(inode);
spin_lock(&v9inode->fscache_lock);
v9inode->fscache_key = qid;
spin_unlock(&v9inode->fscache_lock);
}
static inline void v9fs_fscache_wait_on_page_write(struct inode *inode,
struct page *page)
{

45
fs/9p/v9fs.c
View File

@ -78,6 +78,25 @@ static const match_table_t tokens = {
{Opt_err, NULL}
};
/* Interpret mount options for cache mode */
static int get_cache_mode(char *s)
{
int version = -EINVAL;
if (!strcmp(s, "loose")) {
version = CACHE_LOOSE;
P9_DPRINTK(P9_DEBUG_9P, "Cache mode: loose\n");
} else if (!strcmp(s, "fscache")) {
version = CACHE_FSCACHE;
P9_DPRINTK(P9_DEBUG_9P, "Cache mode: fscache\n");
} else if (!strcmp(s, "none")) {
version = CACHE_NONE;
P9_DPRINTK(P9_DEBUG_9P, "Cache mode: none\n");
} else
printk(KERN_INFO "9p: Unknown Cache mode %s.\n", s);
return version;
}
/**
* v9fs_parse_options - parse mount options into session structure
* @v9ses: existing v9fs session information
@ -97,7 +116,7 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
/* setup defaults */
v9ses->afid = ~0;
v9ses->debug = 0;
v9ses->cache = 0;
v9ses->cache = CACHE_NONE;
#ifdef CONFIG_9P_FSCACHE
v9ses->cachetag = NULL;
#endif
@ -171,13 +190,13 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
"problem allocating copy of cache arg\n");
goto free_and_return;
}
ret = get_cache_mode(s);
if (ret == -EINVAL) {
kfree(s);
goto free_and_return;
}
if (strcmp(s, "loose") == 0)
v9ses->cache = CACHE_LOOSE;
else if (strcmp(s, "fscache") == 0)
v9ses->cache = CACHE_FSCACHE;
else
v9ses->cache = CACHE_NONE;
v9ses->cache = ret;
kfree(s);
break;
@ -200,9 +219,15 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
} else {
v9ses->flags |= V9FS_ACCESS_SINGLE;
v9ses->uid = simple_strtoul(s, &e, 10);
if (*e != '\0')
v9ses->uid = ~0;
if (*e != '\0') {
ret = -EINVAL;
printk(KERN_INFO "9p: Unknown access "
"argument %s.\n", s);
kfree(s);
goto free_and_return;
}
}
kfree(s);
break;
@ -487,8 +512,8 @@ static void v9fs_inode_init_once(void *foo)
struct v9fs_inode *v9inode = (struct v9fs_inode *)foo;
#ifdef CONFIG_9P_FSCACHE
v9inode->fscache = NULL;
v9inode->fscache_key = NULL;
#endif
memset(&v9inode->qid, 0, sizeof(v9inode->qid));
inode_init_once(&v9inode->vfs_inode);
}

29
fs/9p/v9fs.h
View File

@ -125,8 +125,8 @@ struct v9fs_inode {
#ifdef CONFIG_9P_FSCACHE
spinlock_t fscache_lock;
struct fscache_cookie *fscache;
struct p9_qid *fscache_key;
#endif
struct p9_qid qid;
unsigned int cache_validity;
struct p9_fid *writeback_fid;
struct mutex v_mutex;
@ -153,13 +153,13 @@ extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd,
void *p);
extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
struct p9_fid *fid,
struct super_block *sb);
struct super_block *sb, int new);
extern const struct inode_operations v9fs_dir_inode_operations_dotl;
extern const struct inode_operations v9fs_file_inode_operations_dotl;
extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
struct p9_fid *fid,
struct super_block *sb);
struct super_block *sb, int new);
/* other default globals */
#define V9FS_PORT 564
@ -201,8 +201,27 @@ v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
struct super_block *sb)
{
if (v9fs_proto_dotl(v9ses))
return v9fs_inode_from_fid_dotl(v9ses, fid, sb);
return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 0);
else
return v9fs_inode_from_fid(v9ses, fid, sb);
return v9fs_inode_from_fid(v9ses, fid, sb, 0);
}
/**
* v9fs_get_new_inode_from_fid - Helper routine to populate an inode by
* issuing a attribute request
* @v9ses: session information
* @fid: fid to issue attribute request for
* @sb: superblock on which to create inode
*
*/
static inline struct inode *
v9fs_get_new_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
struct super_block *sb)
{
if (v9fs_proto_dotl(v9ses))
return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 1);
else
return v9fs_inode_from_fid(v9ses, fid, sb, 1);
}
#endif

118
fs/9p/vfs_inode.c
View File

@ -216,7 +216,6 @@ struct inode *v9fs_alloc_inode(struct super_block *sb)
return NULL;
#ifdef CONFIG_9P_FSCACHE
v9inode->fscache = NULL;
v9inode->fscache_key = NULL;
spin_lock_init(&v9inode->fscache_lock);
#endif
v9inode->writeback_fid = NULL;
@ -433,17 +432,60 @@ void v9fs_evict_inode(struct inode *inode)
}
}
static int v9fs_test_inode(struct inode *inode, void *data)
{
int umode;
struct v9fs_inode *v9inode = V9FS_I(inode);
struct p9_wstat *st = (struct p9_wstat *)data;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
umode = p9mode2unixmode(v9ses, st->mode);
/* don't match inode of different type */
if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
return 0;
/* compare qid details */
if (memcmp(&v9inode->qid.version,
&st->qid.version, sizeof(v9inode->qid.version)))
return 0;
if (v9inode->qid.type != st->qid.type)
return 0;
return 1;
}
static int v9fs_test_new_inode(struct inode *inode, void *data)
{
return 0;
}
static int v9fs_set_inode(struct inode *inode, void *data)
{
struct v9fs_inode *v9inode = V9FS_I(inode);
struct p9_wstat *st = (struct p9_wstat *)data;
memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
return 0;
}
static struct inode *v9fs_qid_iget(struct super_block *sb,
struct p9_qid *qid,
struct p9_wstat *st)
struct p9_wstat *st,
int new)
{
int retval, umode;
unsigned long i_ino;
struct inode *inode;
struct v9fs_session_info *v9ses = sb->s_fs_info;
int (*test)(struct inode *, void *);
if (new)
test = v9fs_test_new_inode;
else
test = v9fs_test_inode;
i_ino = v9fs_qid2ino(qid);
inode = iget_locked(sb, i_ino);
inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
@ -453,6 +495,7 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
* FIXME!! we may need support for stale inodes
* later.
*/
inode->i_ino = i_ino;
umode = p9mode2unixmode(v9ses, st->mode);
retval = v9fs_init_inode(v9ses, inode, umode);
if (retval)
@ -460,7 +503,6 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
v9fs_stat2inode(st, inode, sb);
#ifdef CONFIG_9P_FSCACHE
v9fs_fscache_set_key(inode, &st->qid);
v9fs_cache_inode_get_cookie(inode);
#endif
unlock_new_inode(inode);
@ -474,7 +516,7 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
struct inode *
v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
struct super_block *sb)
struct super_block *sb, int new)
{
struct p9_wstat *st;
struct inode *inode = NULL;
@ -483,7 +525,7 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
if (IS_ERR(st))
return ERR_CAST(st);
inode = v9fs_qid_iget(sb, &st->qid, st);
inode = v9fs_qid_iget(sb, &st->qid, st, new);
p9stat_free(st);
kfree(st);
return inode;
@ -492,38 +534,50 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
/**
* v9fs_remove - helper function to remove files and directories
* @dir: directory inode that is being deleted
* @file: dentry that is being deleted
* @dentry: dentry that is being deleted
* @rmdir: removing a directory
*
*/
static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
{
int retval;
struct p9_fid *v9fid;
struct inode *file_inode;
struct inode *inode;
int retval = -EOPNOTSUPP;
struct p9_fid *v9fid, *dfid;
struct v9fs_session_info *v9ses;
P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
rmdir);
P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
dir, dentry, flags);
file_inode = file->d_inode;
v9fid = v9fs_fid_clone(file);
if (IS_ERR(v9fid))
return PTR_ERR(v9fid);
retval = p9_client_remove(v9fid);
v9ses = v9fs_inode2v9ses(dir);
inode = dentry->d_inode;
dfid = v9fs_fid_lookup(dentry->d_parent);
if (IS_ERR(dfid)) {
retval = PTR_ERR(dfid);
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
return retval;
}
if (v9fs_proto_dotl(v9ses))
retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags);
if (retval == -EOPNOTSUPP) {
/* Try the one based on path */
v9fid = v9fs_fid_clone(dentry);
if (IS_ERR(v9fid))
return PTR_ERR(v9fid);
retval = p9_client_remove(v9fid);
}
if (!retval) {
/*
* directories on unlink should have zero
* link count
*/
if (rmdir) {
clear_nlink(file_inode);
if (flags & AT_REMOVEDIR) {
clear_nlink(inode);
drop_nlink(dir);
} else
drop_nlink(file_inode);
drop_nlink(inode);
v9fs_invalidate_inode_attr(file_inode);
v9fs_invalidate_inode_attr(inode);
v9fs_invalidate_inode_attr(dir);
}
return retval;
@ -585,7 +639,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
}
/* instantiate inode and assign the unopened fid to the dentry */
inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
@ -814,7 +868,7 @@ int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
{
return v9fs_remove(i, d, 1);
return v9fs_remove(i, d, AT_REMOVEDIR);
}
/**
@ -862,9 +916,12 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
down_write(&v9ses->rename_sem);
if (v9fs_proto_dotl(v9ses)) {
retval = p9_client_rename(oldfid, newdirfid,
(char *) new_dentry->d_name.name);
if (retval != -ENOSYS)
retval = p9_client_renameat(olddirfid, old_dentry->d_name.name,
newdirfid, new_dentry->d_name.name);
if (retval == -EOPNOTSUPP)
retval = p9_client_rename(oldfid, newdirfid,
new_dentry->d_name.name);
if (retval != -EOPNOTSUPP)
goto clunk_newdir;
}
if (old_dentry->d_parent != new_dentry->d_parent) {
@ -889,11 +946,6 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
clear_nlink(new_inode);
else
drop_nlink(new_inode);
/*
* Work around vfs rename rehash bug with
* FS_RENAME_DOES_D_MOVE
*/
v9fs_invalidate_inode_attr(new_inode);
}
if (S_ISDIR(old_inode->i_mode)) {
if (!new_inode)

67
fs/9p/vfs_inode_dotl.c
View File

@ -86,18 +86,63 @@ static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
return dentry;
}
static int v9fs_test_inode_dotl(struct inode *inode, void *data)
{
struct v9fs_inode *v9inode = V9FS_I(inode);
struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
/* don't match inode of different type */
if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
return 0;
if (inode->i_generation != st->st_gen)
return 0;
/* compare qid details */
if (memcmp(&v9inode->qid.version,
&st->qid.version, sizeof(v9inode->qid.version)))
return 0;
if (v9inode->qid.type != st->qid.type)
return 0;
return 1;
}
/* Always get a new inode */
static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
{
return 0;
}
static int v9fs_set_inode_dotl(struct inode *inode, void *data)
{
struct v9fs_inode *v9inode = V9FS_I(inode);
struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
inode->i_generation = st->st_gen;
return 0;
}
static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
struct p9_qid *qid,
struct p9_fid *fid,
struct p9_stat_dotl *st)
struct p9_stat_dotl *st,
int new)
{
int retval;
unsigned long i_ino;
struct inode *inode;
struct v9fs_session_info *v9ses = sb->s_fs_info;
int (*test)(struct inode *, void *);
if (new)
test = v9fs_test_new_inode_dotl;
else
test = v9fs_test_inode_dotl;
i_ino = v9fs_qid2ino(qid);
inode = iget_locked(sb, i_ino);
inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
@ -107,13 +152,13 @@ static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
* FIXME!! we may need support for stale inodes
* later.
*/
inode->i_ino = i_ino;
retval = v9fs_init_inode(v9ses, inode, st->st_mode);
if (retval)
goto error;
v9fs_stat2inode_dotl(st, inode);
#ifdef CONFIG_9P_FSCACHE
v9fs_fscache_set_key(inode, &st->qid);
v9fs_cache_inode_get_cookie(inode);
#endif
retval = v9fs_get_acl(inode, fid);
@ -131,16 +176,16 @@ static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
struct inode *
v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
struct super_block *sb)
struct super_block *sb, int new)
{
struct p9_stat_dotl *st;
struct inode *inode = NULL;
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
if (IS_ERR(st))
return ERR_CAST(st);
inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st);
inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
kfree(st);
return inode;
}
@ -230,7 +275,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
fid = NULL;
goto error;
}
inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
@ -350,7 +395,7 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
goto error;
}
inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
@ -547,7 +592,7 @@ v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
inode->i_blocks = stat->st_blocks;
}
if (stat->st_result_mask & P9_STATS_GEN)
inode->i_generation = stat->st_gen;
inode->i_generation = stat->st_gen;
/* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
* because the inode structure does not have fields for them.
@ -603,7 +648,7 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
}
/* instantiate inode and assign the unopened fid to dentry */
inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
@ -756,7 +801,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
goto error;
}
inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",

193
include/net/9p/9p.h
View File

@ -40,6 +40,7 @@
* @P9_DEBUG_FID: fid allocation/deallocation tracking
* @P9_DEBUG_PKT: packet marshalling/unmarshalling
* @P9_DEBUG_FSC: FS-cache tracing
* @P9_DEBUG_VPKT: Verbose packet debugging (full packet dump)
*
* These flags are passed at mount time to turn on various levels of
* verbosity and tracing which will be output to the system logs.
@ -57,6 +58,7 @@ enum p9_debug_flags {
P9_DEBUG_FID = (1<<9),
P9_DEBUG_PKT = (1<<10),
P9_DEBUG_FSC = (1<<11),
P9_DEBUG_VPKT = (1<<12),
};
#ifdef CONFIG_NET_9P_DEBUG
@ -74,10 +76,14 @@ do { \
} \
} while (0)
#define P9_DUMP_PKT(way, pdu) p9pdu_dump(way, pdu)
#else
#define P9_DPRINTK(level, format, arg...) do { } while (0)
#define P9_DUMP_PKT(way, pdu) do { } while (0)
#endif
#define P9_EPRINTK(level, format, arg...) \
do { \
printk(level "9p: %s (%d): " \
@ -175,6 +181,10 @@ enum p9_msg_t {
P9_RLINK,
P9_TMKDIR = 72,
P9_RMKDIR,
P9_TRENAMEAT = 74,
P9_RRENAMEAT,
P9_TUNLINKAT = 76,
P9_RUNLINKAT,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,
@ -320,21 +330,6 @@ enum p9_qid_t {
/* Room for readdir header */
#define P9_READDIRHDRSZ 24
/**
* struct p9_str - length prefixed string type
* @len: length of the string
* @str: the string
*
* The protocol uses length prefixed strings for all
* string data, so we replicate that for our internal
* string members.
*/
struct p9_str {
u16 len;
char *str;
};
/**
* struct p9_qid - file system entity information
* @type: 8-bit type &p9_qid_t
@ -371,11 +366,11 @@ struct p9_qid {
* @atime: Last access/read time
* @mtime: Last modify/write time
* @length: file length
* @name: last element of path (aka filename) in type &p9_str
* @uid: owner name in type &p9_str
* @gid: group owner in type &p9_str
* @muid: last modifier in type &p9_str
* @extension: area used to encode extended UNIX support in type &p9_str
* @name: last element of path (aka filename)
* @uid: owner name
* @gid: group owner
* @muid: last modifier
* @extension: area used to encode extended UNIX support
* @n_uid: numeric user id of owner (part of 9p2000.u extension)
* @n_gid: numeric group id (part of 9p2000.u extension)
* @n_muid: numeric user id of laster modifier (part of 9p2000.u extension)
@ -512,11 +507,6 @@ struct p9_getlock {
char *client_id;
};
/* Structures for Protocol Operations */
struct p9_tstatfs {
u32 fid;
};
struct p9_rstatfs {
u32 type;
u32 bsize;
@ -529,159 +519,6 @@ struct p9_rstatfs {
u32 namelen;
};
struct p9_trename {
u32 fid;
u32 newdirfid;
struct p9_str name;
};
struct p9_rrename {
};
struct p9_tversion {
u32 msize;
struct p9_str version;
};
struct p9_rversion {
u32 msize;
struct p9_str version;
};
struct p9_tauth {
u32 afid;
struct p9_str uname;
struct p9_str aname;
u32 n_uname; /* 9P2000.u extensions */
};
struct p9_rauth {
struct p9_qid qid;
};
struct p9_rerror {
struct p9_str error;
u32 errno; /* 9p2000.u extension */
};
struct p9_tflush {
u16 oldtag;
};
struct p9_rflush {
};
struct p9_tattach {
u32 fid;
u32 afid;
struct p9_str uname;
struct p9_str aname;
u32 n_uname; /* 9P2000.u extensions */
};
struct p9_rattach {
struct p9_qid qid;
};
struct p9_twalk {
u32 fid;
u32 newfid;
u16 nwname;
struct p9_str wnames[16];
};
struct p9_rwalk {
u16 nwqid;
struct p9_qid wqids[16];
};
struct p9_topen {
u32 fid;
u8 mode;
};
struct p9_ropen {
struct p9_qid qid;
u32 iounit;
};
struct p9_tcreate {
u32 fid;
struct p9_str name;
u32 perm;
u8 mode;
struct p9_str extension;
};
struct p9_rcreate {
struct p9_qid qid;
u32 iounit;
};
struct p9_tread {
u32 fid;
u64 offset;
u32 count;
};
struct p9_rread {
u32 count;
u8 *data;
};
struct p9_twrite {
u32 fid;
u64 offset;
u32 count;
u8 *data;
};
struct p9_rwrite {
u32 count;
};
struct p9_treaddir {
u32 fid;
u64 offset;
u32 count;
};
struct p9_rreaddir {
u32 count;
u8 *data;
};
struct p9_tclunk {
u32 fid;
};
struct p9_rclunk {
};
struct p9_tremove {
u32 fid;
};
struct p9_rremove {
};
struct p9_tstat {
u32 fid;
};
struct p9_rstat {
struct p9_wstat stat;
};
struct p9_twstat {
u32 fid;
struct p9_wstat stat;
};
struct p9_rwstat {
};
/**
* struct p9_fcall - primary packet structure
* @size: prefixed length of the structure

12
include/net/9p/client.h
View File

@ -36,9 +36,9 @@
*/
enum p9_proto_versions{
p9_proto_legacy = 0,
p9_proto_2000u = 1,
p9_proto_2000L = 2,
p9_proto_legacy,
p9_proto_2000u,
p9_proto_2000L,
};
@ -211,7 +211,10 @@ struct p9_dirent {
};
int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb);
int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name);
int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid,
const char *name);
int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name,
struct p9_fid *newdirfid, const char *new_name);
struct p9_client *p9_client_create(const char *dev_name, char *options);
void p9_client_destroy(struct p9_client *clnt);
void p9_client_disconnect(struct p9_client *clnt);
@ -231,6 +234,7 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
int p9_client_clunk(struct p9_fid *fid);
int p9_client_fsync(struct p9_fid *fid, int datasync);
int p9_client_remove(struct p9_fid *fid);
int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags);
int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
u64 offset, u32 count);
int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,

2
include/net/9p/transport.h
View File

@ -67,7 +67,7 @@ struct p9_trans_module {
void v9fs_register_trans(struct p9_trans_module *m);
void v9fs_unregister_trans(struct p9_trans_module *m);
struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name);
struct p9_trans_module *v9fs_get_trans_by_name(char *s);
struct p9_trans_module *v9fs_get_default_trans(void);
void v9fs_put_trans(struct p9_trans_module *m);
#endif /* NET_9P_TRANSPORT_H */

155
net/9p/client.c
View File

@ -72,23 +72,22 @@ inline int p9_is_proto_dotu(struct p9_client *clnt)
EXPORT_SYMBOL(p9_is_proto_dotu);
/* Interpret mount option for protocol version */
static int get_protocol_version(const substring_t *name)
static int get_protocol_version(char *s)
{
int version = -EINVAL;
if (!strncmp("9p2000", name->from, name->to-name->from)) {
if (!strcmp(s, "9p2000")) {
version = p9_proto_legacy;
P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n");
} else if (!strncmp("9p2000.u", name->from, name->to-name->from)) {
} else if (!strcmp(s, "9p2000.u")) {
version = p9_proto_2000u;
P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n");
} else if (!strncmp("9p2000.L", name->from, name->to-name->from)) {
} else if (!strcmp(s, "9p2000.L")) {
version = p9_proto_2000L;
P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n");
} else {
P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ",
name->from);
}
} else
printk(KERN_INFO "9p: Unknown protocol version %s.\n", s);
return version;
}
@ -106,6 +105,7 @@ static int parse_opts(char *opts, struct p9_client *clnt)
char *p;
substring_t args[MAX_OPT_ARGS];
int option;
char *s;
int ret = 0;
clnt->proto_version = p9_proto_2000u;
@ -141,22 +141,41 @@ static int parse_opts(char *opts, struct p9_client *clnt)
clnt->msize = option;
break;
case Opt_trans:
clnt->trans_mod = v9fs_get_trans_by_name(&args[0]);
if(clnt->trans_mod == NULL) {
s = match_strdup(&args[0]);
if (!s) {
ret = -ENOMEM;
P9_DPRINTK(P9_DEBUG_ERROR,
"Could not find request transport: %s\n",
(char *) &args[0]);
"problem allocating copy of trans arg\n");
goto free_and_return;
}
clnt->trans_mod = v9fs_get_trans_by_name(s);
if (clnt->trans_mod == NULL) {
printk(KERN_INFO
"9p: Could not find "
"request transport: %s\n", s);
ret = -EINVAL;
kfree(s);
goto free_and_return;
}
kfree(s);
break;
case Opt_legacy:
clnt->proto_version = p9_proto_legacy;
break;
case Opt_version:
ret = get_protocol_version(&args[0]);
if (ret == -EINVAL)
s = match_strdup(&args[0]);
if (!s) {
ret = -ENOMEM;
P9_DPRINTK(P9_DEBUG_ERROR,
"problem allocating copy of version arg\n");
goto free_and_return;
}
ret = get_protocol_version(s);
if (ret == -EINVAL) {
kfree(s);
goto free_and_return;
}
kfree(s);
clnt->proto_version = ret;
break;
default:
@ -280,7 +299,8 @@ struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
* buffer to read the data into */
tag++;
BUG_ON(tag >= c->max_tag);
if(tag >= c->max_tag)
return NULL;
row = tag / P9_ROW_MAXTAG;
col = tag % P9_ROW_MAXTAG;
@ -749,7 +769,7 @@ static int p9_client_version(struct p9_client *c)
err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
if (err) {
P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto error;
}
@ -821,8 +841,8 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
if (err)
goto destroy_fidpool;
if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
if (clnt->msize > clnt->trans_mod->maxsize)
clnt->msize = clnt->trans_mod->maxsize;
err = p9_client_version(clnt);
if (err)
@ -911,7 +931,7 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
p9_free_req(clnt, req);
goto error;
}
@ -971,7 +991,7 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,
err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
p9_free_req(clnt, req);
goto clunk_fid;
}
@ -1038,7 +1058,7 @@ int p9_client_open(struct p9_fid *fid, int mode)
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
@ -1081,7 +1101,7 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
@ -1126,7 +1146,7 @@ int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
@ -1165,7 +1185,7 @@ int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
@ -1249,9 +1269,11 @@ int p9_client_clunk(struct p9_fid *fid)
P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
p9_free_req(clnt, req);
p9_fid_destroy(fid);
error:
/*
* Fid is not valid even after a failed clunk
*/
p9_fid_destroy(fid);
return err;
}
EXPORT_SYMBOL(p9_client_clunk);
@ -1281,6 +1303,29 @@ int p9_client_remove(struct p9_fid *fid)
}
EXPORT_SYMBOL(p9_client_remove);
int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags)
{
int err = 0;
struct p9_req_t *req;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n",
dfid->fid, name, flags);
clnt = dfid->clnt;
req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name);
p9_free_req(clnt, req);
error:
return err;
}
EXPORT_SYMBOL(p9_client_unlinkat);
int
p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
u32 count)
@ -1318,11 +1363,12 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
P9_DUMP_PKT(1, req->rc);
if (!req->tc->pbuf_size) {
if (data) {
@ -1386,7 +1432,7 @@ p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
@ -1426,7 +1472,7 @@ struct p9_wstat *p9_client_stat(struct p9_fid *fid)
err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
p9_free_req(clnt, req);
goto error;
}
@ -1477,7 +1523,7 @@ struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
p9_free_req(clnt, req);
goto error;
}
@ -1625,7 +1671,7 @@ int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
&sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
&sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
p9_free_req(clnt, req);
goto error;
}
@ -1643,7 +1689,8 @@ int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
}
EXPORT_SYMBOL(p9_client_statfs);
int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)
int p9_client_rename(struct p9_fid *fid,
struct p9_fid *newdirfid, const char *name)
{
int err;
struct p9_req_t *req;
@ -1670,6 +1717,36 @@ int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)
}
EXPORT_SYMBOL(p9_client_rename);
int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name,
struct p9_fid *newdirfid, const char *new_name)
{
int err;
struct p9_req_t *req;
struct p9_client *clnt;
err = 0;
clnt = olddirfid->clnt;
P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s"
" newdirfid %d new name %s\n", olddirfid->fid, old_name,
newdirfid->fid, new_name);
req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid,
old_name, newdirfid->fid, new_name);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n",
newdirfid->fid, new_name);
p9_free_req(clnt, req);
error:
return err;
}
EXPORT_SYMBOL(p9_client_renameat);
/*
* An xattrwalk without @attr_name gives the fid for the lisxattr namespace
*/
@ -1701,7 +1778,7 @@ struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
}
err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
p9_free_req(clnt, req);
goto clunk_fid;
}
@ -1780,7 +1857,7 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto free_and_error;
}
@ -1817,7 +1894,7 @@ int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
@ -1848,7 +1925,7 @@ int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
@ -1883,7 +1960,7 @@ int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status)
err = p9pdu_readf(req->rc, clnt->proto_version, "b", status);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status);
@ -1916,7 +1993,7 @@ int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock)
&glock->start, &glock->length, &glock->proc_id,
&glock->client_id);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld "
@ -1944,7 +2021,7 @@ int p9_client_readlink(struct p9_fid *fid, char **target)
err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);
if (err) {
p9pdu_dump(1, req->rc);
P9_DUMP_PKT(1, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target);

4
net/9p/mod.c
View File

@ -80,14 +80,14 @@ EXPORT_SYMBOL(v9fs_unregister_trans);
* @name: string identifying transport
*
*/
struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name)
struct p9_trans_module *v9fs_get_trans_by_name(char *s)
{
struct p9_trans_module *t, *found = NULL;
spin_lock(&v9fs_trans_lock);
list_for_each_entry(t, &v9fs_trans_list, list)
if (strncmp(t->name, name->from, name->to-name->from) == 0 &&
if (strcmp(t->name, s) == 0 &&
try_module_get(t->owner)) {
found = t;
break;

42
net/9p/protocol.c
View File

@ -44,30 +44,24 @@ p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...);
void
p9pdu_dump(int way, struct p9_fcall *pdu)
{
int i, n;
u8 *data = pdu->sdata;
int datalen = pdu->size;
char buf[255];
int buflen = 255;
int len = pdu->size;
i = n = 0;
if (datalen > (buflen-16))
datalen = buflen-16;
while (i < datalen) {
n += scnprintf(buf + n, buflen - n, "%02x ", data[i]);
if (i%4 == 3)
n += scnprintf(buf + n, buflen - n, " ");
if (i%32 == 31)
n += scnprintf(buf + n, buflen - n, "\n");
i++;
if ((p9_debug_level & P9_DEBUG_VPKT) != P9_DEBUG_VPKT) {
if ((p9_debug_level & P9_DEBUG_PKT) == P9_DEBUG_PKT) {
if (len > 32)
len = 32;
} else {
/* shouldn't happen */
return;
}
}
n += scnprintf(buf + n, buflen - n, "\n");
if (way)
P9_DPRINTK(P9_DEBUG_PKT, "[[[(%d) %s\n", datalen, buf);
print_hex_dump_bytes("[9P] ", DUMP_PREFIX_OFFSET, pdu->sdata,
len);
else
P9_DPRINTK(P9_DEBUG_PKT, "]]](%d) %s\n", datalen, buf);
print_hex_dump_bytes("]9P[ ", DUMP_PREFIX_OFFSET, pdu->sdata,
len);
}
#else
void
@ -610,7 +604,7 @@ int p9stat_read(char *buf, int len, struct p9_wstat *st, int proto_version)
ret = p9pdu_readf(&fake_pdu, proto_version, "S", st);
if (ret) {
P9_DPRINTK(P9_DEBUG_9P, "<<< p9stat_read failed: %d\n", ret);
p9pdu_dump(1, &fake_pdu);
P9_DUMP_PKT(0, &fake_pdu);
}
return ret;
@ -632,11 +626,7 @@ int p9pdu_finalize(struct p9_fcall *pdu)
err = p9pdu_writef(pdu, 0, "d", size);
pdu->size = size;
#ifdef CONFIG_NET_9P_DEBUG
if ((p9_debug_level & P9_DEBUG_PKT) == P9_DEBUG_PKT)
p9pdu_dump(0, pdu);
#endif
P9_DUMP_PKT(0, pdu);
P9_DPRINTK(P9_DEBUG_9P, ">>> size=%d type: %d tag: %d\n", pdu->size,
pdu->id, pdu->tag);
@ -669,7 +659,7 @@ int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
&dirent->d_off, &dirent->d_type, &nameptr);
if (ret) {
P9_DPRINTK(P9_DEBUG_9P, "<<< p9dirent_read failed: %d\n", ret);
p9pdu_dump(1, &fake_pdu);
P9_DUMP_PKT(1, &fake_pdu);
goto out;
}

4
net/9p/trans_virtio.c
View File

@ -367,7 +367,7 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req)
in += inp;
} else {
in = pack_sg_list(chan->sg, out, VIRTQUEUE_NUM, rdata,
client->msize);
req->rc->capacity);
}
err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc);
@ -592,7 +592,7 @@ static struct p9_trans_module p9_virtio_trans = {
.close = p9_virtio_close,
.request = p9_virtio_request,
.cancel = p9_virtio_cancel,
.maxsize = PAGE_SIZE*16,
.maxsize = PAGE_SIZE*VIRTQUEUE_NUM,
.pref = P9_TRANS_PREF_PAYLOAD_SEP,
.def = 0,
.owner = THIS_MODULE,