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-rw-r--r--fs/9p/conv.c157
-rw-r--r--fs/9p/fid.c176
-rw-r--r--fs/9p/fid.h7
-rw-r--r--fs/9p/v9fs.c8
-rw-r--r--fs/9p/vfs_dentry.c2
-rw-r--r--fs/9p/vfs_dir.c11
-rw-r--r--fs/9p/vfs_file.c88
-rw-r--r--fs/9p/vfs_inode.c95
-rw-r--r--fs/9p/vfs_super.c39
9 files changed, 299 insertions, 284 deletions
diff --git a/fs/9p/conv.c b/fs/9p/conv.c
index 1554731bd65..18121af99d3 100644
--- a/fs/9p/conv.c
+++ b/fs/9p/conv.c
@@ -3,6 +3,7 @@
*
* 9P protocol conversion functions
*
+ * Copyright (C) 2004, 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>
*
@@ -55,66 +56,70 @@ static inline int buf_check_overflow(struct cbuf *buf)
return buf->p > buf->ep;
}
-static inline void buf_check_size(struct cbuf *buf, int len)
+static inline int buf_check_size(struct cbuf *buf, int len)
{
if (buf->p+len > buf->ep) {
if (buf->p < buf->ep) {
eprintk(KERN_ERR, "buffer overflow\n");
buf->p = buf->ep + 1;
+ return 0;
}
}
+
+ return 1;
}
static inline void *buf_alloc(struct cbuf *buf, int len)
{
void *ret = NULL;
- buf_check_size(buf, len);
- ret = buf->p;
- buf->p += len;
+ if (buf_check_size(buf, len)) {
+ ret = buf->p;
+ buf->p += len;
+ }
return ret;
}
static inline void buf_put_int8(struct cbuf *buf, u8 val)
{
- buf_check_size(buf, 1);
-
- buf->p[0] = val;
- buf->p++;
+ if (buf_check_size(buf, 1)) {
+ buf->p[0] = val;
+ buf->p++;
+ }
}
static inline void buf_put_int16(struct cbuf *buf, u16 val)
{
- buf_check_size(buf, 2);
-
- *(__le16 *) buf->p = cpu_to_le16(val);
- buf->p += 2;
+ if (buf_check_size(buf, 2)) {
+ *(__le16 *) buf->p = cpu_to_le16(val);
+ buf->p += 2;
+ }
}
static inline void buf_put_int32(struct cbuf *buf, u32 val)
{
- buf_check_size(buf, 4);
-
- *(__le32 *)buf->p = cpu_to_le32(val);
- buf->p += 4;
+ if (buf_check_size(buf, 4)) {
+ *(__le32 *)buf->p = cpu_to_le32(val);
+ buf->p += 4;
+ }
}
static inline void buf_put_int64(struct cbuf *buf, u64 val)
{
- buf_check_size(buf, 8);
-
- *(__le64 *)buf->p = cpu_to_le64(val);
- buf->p += 8;
+ if (buf_check_size(buf, 8)) {
+ *(__le64 *)buf->p = cpu_to_le64(val);
+ buf->p += 8;
+ }
}
static inline void buf_put_stringn(struct cbuf *buf, const char *s, u16 slen)
{
- buf_check_size(buf, slen + 2);
-
- buf_put_int16(buf, slen);
- memcpy(buf->p, s, slen);
- buf->p += slen;
+ if (buf_check_size(buf, slen + 2)) {
+ buf_put_int16(buf, slen);
+ memcpy(buf->p, s, slen);
+ buf->p += slen;
+ }
}
static inline void buf_put_string(struct cbuf *buf, const char *s)
@@ -124,20 +129,20 @@ static inline void buf_put_string(struct cbuf *buf, const char *s)
static inline void buf_put_data(struct cbuf *buf, void *data, u32 datalen)
{
- buf_check_size(buf, datalen);
-
- memcpy(buf->p, data, datalen);
- buf->p += 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;
- buf_check_size(buf, 1);
- ret = buf->p[0];
-
- buf->p++;
+ if (buf_check_size(buf, 1)) {
+ ret = buf->p[0];
+ buf->p++;
+ }
return ret;
}
@@ -146,10 +151,10 @@ static inline u16 buf_get_int16(struct cbuf *buf)
{
u16 ret = 0;
- buf_check_size(buf, 2);
- ret = le16_to_cpu(*(__le16 *)buf->p);
-
- buf->p += 2;
+ if (buf_check_size(buf, 2)) {
+ ret = le16_to_cpu(*(__le16 *)buf->p);
+ buf->p += 2;
+ }
return ret;
}
@@ -158,10 +163,10 @@ static inline u32 buf_get_int32(struct cbuf *buf)
{
u32 ret = 0;
- buf_check_size(buf, 4);
- ret = le32_to_cpu(*(__le32 *)buf->p);
-
- buf->p += 4;
+ if (buf_check_size(buf, 4)) {
+ ret = le32_to_cpu(*(__le32 *)buf->p);
+ buf->p += 4;
+ }
return ret;
}
@@ -170,10 +175,10 @@ static inline u64 buf_get_int64(struct cbuf *buf)
{
u64 ret = 0;
- buf_check_size(buf, 8);
- ret = le64_to_cpu(*(__le64 *)buf->p);
-
- buf->p += 8;
+ if (buf_check_size(buf, 8)) {
+ ret = le64_to_cpu(*(__le64 *)buf->p);
+ buf->p += 8;
+ }
return ret;
}
@@ -181,27 +186,35 @@ static inline u64 buf_get_int64(struct cbuf *buf)
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++;
+ }
- u16 len = buf_get_int16(buf);
- buf_check_size(buf, len);
- if (len + 1 > datalen)
- return 0;
-
- memcpy(data, buf->p, len);
- data[len] = 0;
- buf->p += len;
-
- return len + 1;
+ return len;
}
static inline char *buf_get_stringb(struct cbuf *buf, struct cbuf *sbuf)
{
- char *ret = NULL;
- int n = buf_get_string(buf, sbuf->p, sbuf->ep - sbuf->p);
+ char *ret;
+ u16 len;
+
+ ret = NULL;
+ len = buf_get_int16(buf);
- if (n > 0) {
+ 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;
- sbuf->p += n;
+ buf->p += len;
+ sbuf->p += len + 1;
}
return ret;
@@ -209,12 +222,15 @@ static inline char *buf_get_stringb(struct cbuf *buf, struct cbuf *sbuf)
static inline int buf_get_data(struct cbuf *buf, void *data, int datalen)
{
- buf_check_size(buf, datalen);
+ int ret = 0;
- memcpy(data, buf->p, datalen);
- buf->p += datalen;
+ if (buf_check_size(buf, datalen)) {
+ memcpy(data, buf->p, datalen);
+ buf->p += datalen;
+ ret = datalen;
+ }
- return datalen;
+ return ret;
}
static inline void *buf_get_datab(struct cbuf *buf, struct cbuf *dbuf,
@@ -223,13 +239,12 @@ static inline void *buf_get_datab(struct cbuf *buf, struct cbuf *dbuf,
char *ret = NULL;
int n = 0;
- buf_check_size(dbuf, datalen);
-
- n = buf_get_data(buf, dbuf->p, datalen);
-
- if (n > 0) {
- ret = dbuf->p;
- dbuf->p += n;
+ 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;
@@ -636,7 +651,7 @@ 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(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++) {
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 821c9c4d76a..d95f8626d17 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -71,21 +71,28 @@ static int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
*
*/
-struct v9fs_fid *v9fs_fid_create(struct dentry *dentry)
+struct v9fs_fid *v9fs_fid_create(struct dentry *dentry,
+ struct v9fs_session_info *v9ses, int fid, int create)
{
struct v9fs_fid *new;
+ dprintk(DEBUG_9P, "fid create dentry %p, fid %d, create %d\n",
+ dentry, fid, create);
+
new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
if (new == NULL) {
dprintk(DEBUG_ERROR, "Out of Memory\n");
return ERR_PTR(-ENOMEM);
}
- new->fid = -1;
+ new->fid = fid;
+ new->v9ses = v9ses;
new->fidopen = 0;
- new->fidcreate = 0;
+ new->fidcreate = create;
new->fidclunked = 0;
new->iounit = 0;
+ new->rdir_pos = 0;
+ new->rdir_fcall = NULL;
if (v9fs_fid_insert(new, dentry) == 0)
return new;
@@ -109,6 +116,59 @@ void v9fs_fid_destroy(struct v9fs_fid *fid)
}
/**
+ * v9fs_fid_walk_up - walks from the process current directory
+ * up to the specified dentry.
+ */
+static struct v9fs_fid *v9fs_fid_walk_up(struct dentry *dentry)
+{
+ int fidnum, cfidnum, err;
+ struct v9fs_fid *cfid;
+ struct dentry *cde;
+ struct v9fs_session_info *v9ses;
+
+ v9ses = v9fs_inode2v9ses(current->fs->pwd->d_inode);
+ cfid = v9fs_fid_lookup(current->fs->pwd);
+ if (cfid == NULL) {
+ dprintk(DEBUG_ERROR, "process cwd doesn't have a fid\n");
+ return ERR_PTR(-ENOENT);
+ }
+
+ cfidnum = cfid->fid;
+ cde = current->fs->pwd;
+ /* TODO: take advantage of multiwalk */
+
+ fidnum = v9fs_get_idpool(&v9ses->fidpool);
+ if (fidnum < 0) {
+ dprintk(DEBUG_ERROR, "could not get a new fid num\n");
+ err = -ENOENT;
+ goto clunk_fid;
+ }
+
+ while (cde != dentry) {
+ if (cde == cde->d_parent) {
+ dprintk(DEBUG_ERROR, "can't find dentry\n");
+ err = -ENOENT;
+ goto clunk_fid;
+ }
+
+ err = v9fs_t_walk(v9ses, cfidnum, fidnum, "..", NULL);
+ if (err < 0) {
+ dprintk(DEBUG_ERROR, "problem walking to parent\n");
+ goto clunk_fid;
+ }
+
+ cfidnum = fidnum;
+ cde = cde->d_parent;
+ }
+
+ return v9fs_fid_create(dentry, v9ses, fidnum, 0);
+
+clunk_fid:
+ v9fs_t_clunk(v9ses, fidnum, NULL);
+ return ERR_PTR(err);
+}
+
+/**
* v9fs_fid_lookup - retrieve the right fid from a particular dentry
* @dentry: dentry to look for fid in
* @type: intent of lookup (operation or traversal)
@@ -119,49 +179,25 @@ void v9fs_fid_destroy(struct v9fs_fid *fid)
*
*/
-struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry, int type)
+struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
{
struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
struct v9fs_fid *current_fid = NULL;
struct v9fs_fid *temp = NULL;
struct v9fs_fid *return_fid = NULL;
- int found_parent = 0;
- int found_user = 0;
- dprintk(DEBUG_9P, " dentry: %s (%p) type %d\n", dentry->d_iname, dentry,
- type);
+ dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
- if (fid_list && !list_empty(fid_list)) {
+ if (fid_list) {
list_for_each_entry_safe(current_fid, temp, fid_list, list) {
- if (current_fid->uid == current->uid) {
- if (return_fid == NULL) {
- if ((type == FID_OP)
- || (!current_fid->fidopen)) {
- return_fid = current_fid;
- found_user = 1;
- }
- }
- }
- if (current_fid->pid == current->real_parent->pid) {
- if ((return_fid == NULL) || (found_parent)
- || (found_user)) {
- if ((type == FID_OP)
- || (!current_fid->fidopen)) {
- return_fid = current_fid;
- found_parent = 1;
- found_user = 0;
- }
- }
- }
- if (current_fid->pid == current->pid) {
- if ((type == FID_OP) ||
- (!current_fid->fidopen)) {
- return_fid = current_fid;
- found_parent = 0;
- found_user = 0;
- }
+ if (!current_fid->fidcreate) {
+ return_fid = current_fid;
+ break;
}
}
+
+ if (!return_fid)
+ return_fid = current_fid;
}
/* we are at the root but didn't match */
@@ -187,55 +223,33 @@ struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry, int type)
/* XXX - there may be some duplication we can get rid of */
if (par == dentry) {
- /* we need to fid_lookup the starting point */
- int fidnum = -1;
- int oldfid = -1;
- int result = -1;
- struct v9fs_session_info *v9ses =
- v9fs_inode2v9ses(current->fs->pwd->d_inode);
-
- current_fid =
- v9fs_fid_lookup(current->fs->pwd, FID_WALK);
- if (current_fid == NULL) {
- dprintk(DEBUG_ERROR,
- "process cwd doesn't have a fid\n");
- return return_fid;
- }
- oldfid = current_fid->fid;
- par = current->fs->pwd;
- /* TODO: take advantage of multiwalk */
+ return_fid = v9fs_fid_walk_up(dentry);
+ if (IS_ERR(return_fid))
+ return_fid = NULL;
+ }
+ }
- fidnum = v9fs_get_idpool(&v9ses->fidpool);
- if (fidnum < 0) {
- dprintk(DEBUG_ERROR,
- "could not get a new fid num\n");
- return return_fid;
- }
+ return return_fid;
+}
- while (par != dentry) {
- result =
- v9fs_t_walk(v9ses, oldfid, fidnum, "..",
- NULL);
- if (result < 0) {
- dprintk(DEBUG_ERROR,
- "problem walking to parent\n");
-
- break;
- }
- oldfid = fidnum;
- if (par == par->d_parent) {
- dprintk(DEBUG_ERROR,
- "can't find dentry\n");
- break;
- }
- par = par->d_parent;
- }
- if (par == dentry) {
- return_fid = v9fs_fid_create(dentry);
- return_fid->fid = fidnum;
+struct v9fs_fid *v9fs_fid_get_created(struct dentry *dentry)
+{
+ struct list_head *fid_list;
+ struct v9fs_fid *fid, *ftmp, *ret;
+
+ dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ fid_list = (struct list_head *)dentry->d_fsdata;
+ ret = NULL;
+ if (fid_list) {
+ list_for_each_entry_safe(fid, ftmp, fid_list, list) {
+ if (fid->fidcreate && fid->pid == current->pid) {
+ list_del(&fid->list);
+ ret = fid;
+ break;
}
}
}
- return return_fid;
+ dprintk(DEBUG_9P, "return %p\n", ret);
+ return ret;
}
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index 7db478ccca3..84c673a44c8 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -25,6 +25,7 @@
#define FID_OP 0
#define FID_WALK 1
+#define FID_CREATE 2
struct v9fs_fid {
struct list_head list; /* list of fids associated with a dentry */
@@ -52,6 +53,8 @@ struct v9fs_fid {
struct v9fs_session_info *v9ses; /* session info for this FID */
};
-struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry, int type);
+struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry);
+struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
void v9fs_fid_destroy(struct v9fs_fid *fid);
-struct v9fs_fid *v9fs_fid_create(struct dentry *);
+struct v9fs_fid *v9fs_fid_create(struct dentry *,
+ struct v9fs_session_info *v9ses, int fid, int create);
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 13bdbbab438..82303f3bf76 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -303,7 +303,13 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
goto SessCleanUp;
};
- v9ses->transport = trans_proto;
+ v9ses->transport = kmalloc(sizeof(*v9ses->transport), GFP_KERNEL);
+ if (!v9ses->transport) {
+ retval = -ENOMEM;
+ goto SessCleanUp;
+ }
+
+ memmove(v9ses->transport, trans_proto, sizeof(*v9ses->transport));
if ((retval = v9ses->transport->init(v9ses, dev_name, data)) < 0) {
eprintk(KERN_ERR, "problem initializing transport\n");
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index 306c96741f8..a6aa947de0f 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -67,7 +67,7 @@ static int v9fs_dentry_validate(struct dentry *dentry, struct nameidata *nd)
struct dentry *dc = current->fs->pwd;
dprintk(DEBUG_VFS, "dentry: %s (%p)\n", dentry->d_iname, dentry);
- if (v9fs_fid_lookup(dentry, FID_OP)) {
+ if (v9fs_fid_lookup(dentry)) {
dprintk(DEBUG_VFS, "VALID\n");
return 1;
}
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index c478a738418..57a43b8feef 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -197,21 +197,18 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
filemap_fdatawait(inode->i_mapping);
if (fidnum >= 0) {
- fid->fidopen--;
dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
fid->fid);
- if (fid->fidopen == 0) {
- if (v9fs_t_clunk(v9ses, fidnum, NULL))
- dprintk(DEBUG_ERROR, "clunk failed\n");
+ if (v9fs_t_clunk(v9ses, fidnum, NULL))
+ dprintk(DEBUG_ERROR, "clunk failed\n");
- v9fs_put_idpool(fid->fid, &v9ses->fidpool);
- }
+ v9fs_put_idpool(fid->fid, &v9ses->fidpool);
kfree(fid->rdir_fcall);
+ kfree(fid);
filp->private_data = NULL;
- v9fs_fid_destroy(fid);
}
d_drop(filp->f_dentry);
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 1f8ae7d580a..a4799e971d1 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -53,30 +53,36 @@
int v9fs_file_open(struct inode *inode, struct file *file)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *v9fid = v9fs_fid_lookup(file->f_dentry, FID_WALK);
- struct v9fs_fid *v9newfid = NULL;
+ struct v9fs_fid *v9fid, *fid;
struct v9fs_fcall *fcall = NULL;
int open_mode = 0;
unsigned int iounit = 0;
int newfid = -1;
long result = -1;
- dprintk(DEBUG_VFS, "inode: %p file: %p v9fid= %p\n", inode, file,
- v9fid);
+ dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file);
+
+ v9fid = v9fs_fid_get_created(file->f_dentry);
+ if (!v9fid)
+ v9fid = v9fs_fid_lookup(file->f_dentry);
if (!v9fid) {
- struct dentry *dentry = file->f_dentry;
dprintk(DEBUG_ERROR, "Couldn't resolve fid from dentry\n");
+ return -EBADF;
+ }
- /* XXX - some duplication from lookup, generalize later */
- /* basically vfs_lookup is too heavy weight */
- v9fid = v9fs_fid_lookup(file->f_dentry, FID_OP);
- if (!v9fid)
- return -EBADF;
+ if (!v9fid->fidcreate) {
+ fid = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
+ if (fid == NULL) {
+ dprintk(DEBUG_ERROR, "Out of Memory\n");
+ return -ENOMEM;
+ }
- v9fid = v9fs_fid_lookup(dentry->d_parent, FID_WALK);
- if (!v9fid)
- return -EBADF;
+ fid->fidopen = 0;
+ fid->fidcreate = 0;
+ fid->fidclunked = 0;
+ fid->iounit = 0;
+ fid->v9ses = v9ses;
newfid = v9fs_get_idpool(&v9ses->fidpool);
if (newfid < 0) {
@@ -85,58 +91,16 @@ int v9fs_file_open(struct inode *inode, struct file *file)
}
result =
- v9fs_t_walk(v9ses, v9fid->fid, newfid,
- (char *)file->f_dentry->d_name.name, NULL);
+ v9fs_t_walk(v9ses, v9fid->fid, newfid, NULL, NULL);
+
if (result < 0) {
v9fs_put_idpool(newfid, &v9ses->fidpool);
dprintk(DEBUG_ERROR, "rewalk didn't work\n");
return -EBADF;
}
- v9fid = v9fs_fid_create(dentry);
- if (v9fid == NULL) {
- dprintk(DEBUG_ERROR, "couldn't insert\n");
- return -ENOMEM;
- }
- v9fid->fid = newfid;
- }
-
- if (v9fid->fidcreate) {
- /* create case */
- newfid = v9fid->fid;
- iounit = v9fid->iounit;
- v9fid->fidcreate = 0;
- } else {
- if (!S_ISDIR(inode->i_mode))
- newfid = v9fid->fid;
- else {
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "allocation failed\n");
- return -ENOSPC;
- }
- /* This would be a somewhat critical clone */
- result =
- v9fs_t_walk(v9ses, v9fid->fid, newfid, NULL,
- &fcall);
- if (result < 0) {
- dprintk(DEBUG_ERROR, "clone error: %s\n",
- FCALL_ERROR(fcall));
- kfree(fcall);
- return result;
- }
-
- v9newfid = v9fs_fid_create(file->f_dentry);
- v9newfid->fid = newfid;
- v9newfid->qid = v9fid->qid;
- v9newfid->iounit = v9fid->iounit;
- v9newfid->fidopen = 0;
- v9newfid->fidclunked = 0;
- v9newfid->v9ses = v9ses;
- v9fid = v9newfid;
- kfree(fcall);
- }
-
+ fid->fid = newfid;
+ v9fid = fid;
/* TODO: do special things for O_EXCL, O_NOFOLLOW, O_SYNC */
/* translate open mode appropriately */
open_mode = file->f_flags & 0x3;
@@ -163,9 +127,13 @@ int v9fs_file_open(struct inode *inode, struct file *file)
iounit = fcall->params.ropen.iounit;
kfree(fcall);
+ } else {
+ /* create case */
+ newfid = v9fid->fid;
+ iounit = v9fid->iounit;
+ v9fid->fidcreate = 0;
}
-
file->private_data = v9fid;
v9fid->rdir_pos = 0;
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 0c13fc60004..2b696ae6655 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -307,7 +307,7 @@ v9fs_create(struct inode *dir,
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
struct super_block *sb = dir->i_sb;
struct v9fs_fid *dirfid =
- v9fs_fid_lookup(file_dentry->d_parent, FID_WALK);
+ v9fs_fid_lookup(file_dentry->d_parent);
struct v9fs_fid *fid = NULL;
struct inode *file_inode = NULL;
struct v9fs_fcall *fcall = NULL;
@@ -317,6 +317,7 @@ v9fs_create(struct inode *dir,
long newfid = -1;
int result = 0;
unsigned int iounit = 0;
+ int wfidno = -1;
perm = unixmode2p9mode(v9ses, perm);
@@ -350,7 +351,7 @@ v9fs_create(struct inode *dir,
if (result < 0) {
dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
v9fs_put_idpool(newfid, &v9ses->fidpool);
- newfid = 0;
+ newfid = -1;
goto CleanUpFid;
}
@@ -369,20 +370,39 @@ v9fs_create(struct inode *dir,
qid = fcall->params.rcreate.qid;
kfree(fcall);
- fid = v9fs_fid_create(file_dentry);
+ 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->fid = newfid;
- fid->fidopen = 0;
- fid->fidcreate = 1;
fid->qid = qid;
fid->iounit = iounit;
- fid->rdir_pos = 0;
- fid->rdir_fcall = NULL;
- fid->v9ses = v9ses;
+
+ /* walk to the newly created file and put the fid in the dentry */
+ wfidno = v9fs_get_idpool(&v9ses->fidpool);
+ if (newfid < 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);
+ if (result < 0) {
+ dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
+ v9fs_put_idpool(wfidno, &v9ses->fidpool);
+ wfidno = -1;
+ goto CleanUpFid;
+ }
+
+ if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) {
+ if (!v9fs_t_clunk(v9ses, newfid, &fcall)) {
+ v9fs_put_idpool(wfidno, &v9ses->fidpool);
+ }
+
+ goto CleanUpFid;
+ }
if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) ||
(perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) ||
@@ -410,11 +430,11 @@ v9fs_create(struct inode *dir,
d_instantiate(file_dentry, file_inode);
if (perm & V9FS_DMDIR) {
- if (v9fs_t_clunk(v9ses, newfid, &fcall))
+ 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));
-
- v9fs_put_idpool(newfid, &v9ses->fidpool);
kfree(fcall);
fid->fidopen = 0;
fid->fidcreate = 0;
@@ -426,12 +446,22 @@ v9fs_create(struct inode *dir,
CleanUpFid:
kfree(fcall);
- if (newfid) {
- if (v9fs_t_clunk(v9ses, newfid, &fcall))
+ 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);
+ }
+ 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));
- v9fs_put_idpool(newfid, &v9ses->fidpool);
kfree(fcall);
}
return result;
@@ -461,7 +491,7 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
file_inode = file->d_inode;
sb = file_inode->i_sb;
v9ses = v9fs_inode2v9ses(file_inode);
- v9fid = v9fs_fid_lookup(file, FID_OP);
+ v9fid = v9fs_fid_lookup(file);
if (!v9fid) {
dprintk(DEBUG_ERROR,
@@ -545,7 +575,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
sb = dir->i_sb;
v9ses = v9fs_inode2v9ses(dir);
- dirfid = v9fs_fid_lookup(dentry->d_parent, FID_WALK);
+ dirfid = v9fs_fid_lookup(dentry->d_parent);
if (!dirfid) {
dprintk(DEBUG_ERROR, "no dirfid\n");
@@ -573,7 +603,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
v9fs_put_idpool(newfid, &v9ses->fidpool);
if (result == -ENOENT) {
d_add(dentry, NULL);
- dprintk(DEBUG_ERROR,
+ dprintk(DEBUG_VFS,
"Return negative dentry %p count %d\n",
dentry, atomic_read(&dentry->d_count));
return NULL;
@@ -601,16 +631,13 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat->qid);
- fid = v9fs_fid_create(dentry);
+ fid = v9fs_fid_create(dentry, v9ses, newfid, 0);
if (fid == NULL) {
dprintk(DEBUG_ERROR, "couldn't insert\n");
result = -ENOMEM;
goto FreeFcall;
}
- fid->fid = newfid;
- fid->fidopen = 0;
- fid->v9ses = v9ses;
fid->qid = fcall->params.rstat.stat->qid;
dentry->d_op = &v9fs_dentry_operations;
@@ -665,11 +692,11 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
{
struct inode *old_inode = old_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
- struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry, FID_WALK);
+ struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
struct v9fs_fid *olddirfid =
- v9fs_fid_lookup(old_dentry->d_parent, FID_WALK);
+ v9fs_fid_lookup(old_dentry->d_parent);
struct v9fs_fid *newdirfid =
- v9fs_fid_lookup(new_dentry->d_parent, FID_WALK);
+ v9fs_fid_lookup(new_dentry->d_parent);
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
struct v9fs_fcall *fcall = NULL;
int fid = -1;
@@ -744,7 +771,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
{
struct v9fs_fcall *fcall = NULL;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_lookup(dentry, FID_OP);
+ struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
int err = -EPERM;
dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
@@ -778,7 +805,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
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, FID_OP);
+ struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
int res = -EPERM;
@@ -960,7 +987,7 @@ v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
if (retval != 0)
goto FreeFcall;
- newfid = v9fs_fid_lookup(dentry, FID_OP);
+ newfid = v9fs_fid_lookup(dentry);
/* issue a twstat */
v9fs_blank_mistat(v9ses, mistat);
@@ -1004,7 +1031,7 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
struct v9fs_fcall *fcall = NULL;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_lookup(dentry, FID_OP);
+ struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
if (!fid) {
dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n");
@@ -1063,8 +1090,8 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
int ret;
char *link = __getname();
- if (strlen(link) < buflen)
- buflen = strlen(link);
+ if (buflen > PATH_MAX)
+ buflen = PATH_MAX;
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
@@ -1148,7 +1175,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
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, FID_OP);
+ struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
struct v9fs_fid *newfid = NULL;
char *symname = __getname();
@@ -1168,7 +1195,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
if (retval != 0)
goto FreeMem;
- newfid = v9fs_fid_lookup(dentry, FID_OP);
+ newfid = v9fs_fid_lookup(dentry);
if (!newfid) {
dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n");
goto FreeMem;
@@ -1246,7 +1273,7 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
if (retval != 0)
goto FreeMem;
- newfid = v9fs_fid_lookup(dentry, FID_OP);
+ newfid = v9fs_fid_lookup(dentry);
if (!newfid) {
dprintk(DEBUG_ERROR, "coudn't resove fid from dentry\n");
retval = -EINVAL;
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 868f350b2c5..82c5b008407 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -129,8 +129,7 @@ static struct super_block *v9fs_get_sb(struct file_system_type
if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
dprintk(DEBUG_ERROR, "problem initiating session\n");
- retval = newfid;
- goto free_session;
+ return ERR_PTR(newfid);
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
@@ -150,28 +149,24 @@ static struct super_block *v9fs_get_sb(struct file_system_type
if (!root) {
retval = -ENOMEM;
- goto release_inode;
+ goto put_back_sb;
}
sb->s_root = root;
- /* Setup the Root Inode */
- root_fid = v9fs_fid_create(root);
- if (root_fid == NULL) {
- retval = -ENOMEM;
- goto release_dentry;
- }
-
- root_fid->fidopen = 0;
- root_fid->v9ses = v9ses;
-
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_put_idpool(newfid, &v9ses->fidpool);
} else {
- root_fid->fid = newfid;
+ /* Setup the Root Inode */
+ root_fid = v9fs_fid_create(root, v9ses, newfid, 0);
+ if (root_fid == NULL) {
+ retval = -ENOMEM;
+ goto put_back_sb;
+ }
+
root_fid->qid = fcall->params.rstat.stat->qid;
root->d_inode->i_ino =
v9fs_qid2ino(&fcall->params.rstat.stat->qid);
@@ -182,25 +177,15 @@ static struct super_block *v9fs_get_sb(struct file_system_type
if (stat_result < 0) {
retval = stat_result;
- goto release_dentry;
+ goto put_back_sb;
}
return sb;
- release_dentry:
- dput(sb->s_root);
-
- release_inode:
- iput(inode);
-
- put_back_sb:
+put_back_sb:
+ /* deactivate_super calls v9fs_kill_super which will frees the rest */
up_write(&sb->s_umount);
deactivate_super(sb);
- v9fs_session_close(v9ses);
-
- free_session:
- kfree(v9ses);
-
return ERR_PTR(retval);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-07 21:29:51 +0000