static int
v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int err;
char *name;
struct dentry *dir_dentry;
struct p9_fid *dfid, *oldfid;
struct v9fs_session_info *v9ses;
P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
dir->i_ino, old_dentry->d_name.name,
dentry->d_name.name);
v9ses = v9fs_inode2v9ses(dir);
dir_dentry = v9fs_dentry_from_dir_inode(dir);
dfid = v9fs_fid_lookup(dir_dentry);
if (IS_ERR(dfid))
return PTR_ERR(dfid);
oldfid = v9fs_fid_lookup(old_dentry);
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
name = (char *) dentry->d_name.name;
err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
if (err < 0) {
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
return err;
}
v9fs_invalidate_inode_attr(dir);
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
/* Get the latest stat info from server. */
struct p9_fid *fid;
fid = v9fs_fid_lookup(old_dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
}
ihold(old_dentry->d_inode);
d_instantiate(dentry, old_dentry->d_inode);
return err;
}
static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct v9fs_session_info *v9ses;
struct p9_fid *fid;
struct p9_rstatfs rs;
int res;
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid)) {
res = PTR_ERR(fid);
goto done;
}
v9ses = v9fs_inode2v9ses(dentry->d_inode);
if (v9fs_proto_dotl(v9ses)) {
res = p9_client_statfs(fid, &rs);
if (res == 0) {
buf->f_type = V9FS_MAGIC;
buf->f_bsize = rs.bsize;
buf->f_blocks = rs.blocks;
buf->f_bfree = rs.bfree;
buf->f_bavail = rs.bavail;
buf->f_files = rs.files;
buf->f_ffree = rs.ffree;
buf->f_fsid.val[0] = rs.fsid & 0xFFFFFFFFUL;
buf->f_fsid.val[1] = (rs.fsid >> 32) & 0xFFFFFFFFUL;
buf->f_namelen = rs.namelen;
}
if (res != -ENOSYS)
goto done;
}
static void *
v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
{
int retval;
struct p9_fid *fid;
char *link = __getname();
char *target;
P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
if (!link) {
link = ERR_PTR(-ENOMEM);
goto ndset;
}
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid)) {
__putname(link);
link = ERR_CAST(fid);
goto ndset;
}
retval = p9_client_readlink(fid, &target);
if (!retval) {
strcpy(link, target);
kfree(target);
goto ndset;
}
__putname(link);
link = ERR_PTR(retval);
ndset:
nd_set_link(nd, link);
return NULL;
}
/*
* v9fs_xattr_set()
*
* Create, replace or remove an extended attribute for this inode. Buffer
* is NULL to remove an existing extended attribute, and non-NULL to
* either replace an existing extended attribute, or create a new extended
* attribute. The flags XATTR_REPLACE and XATTR_CREATE
* specify that an extended attribute must exist and must not exist
* previous to the call, respectively.
*
* Returns 0, or a negative error number on failure.
*/
int v9fs_xattr_set(struct dentry *dentry, const char *name,
const void *value, size_t value_len, int flags)
{
struct p9_fid *fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
return v9fs_fid_xattr_set(fid, name, value, value_len, flags);
}
struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
{
struct p9_fid *fid, *ret;
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return fid;
ret = p9_client_walk(fid, 0, NULL, 1);
return ret;
}
int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
{
int retval;
struct v9fs_session_info *v9ses;
struct p9_fid *fid;
struct p9_iattr_dotl p9attr;
P9_DPRINTK(P9_DEBUG_VFS, "\n");
retval = inode_change_ok(dentry->d_inode, iattr);
if (retval)
return retval;
p9attr.valid = iattr->ia_valid;
p9attr.mode = iattr->ia_mode;
p9attr.uid = iattr->ia_uid;
p9attr.gid = iattr->ia_gid;
p9attr.size = iattr->ia_size;
p9attr.atime_sec = iattr->ia_atime.tv_sec;
p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
retval = -EPERM;
v9ses = v9fs_dentry2v9ses(dentry);
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
/* Write all dirty data */
if (S_ISREG(dentry->d_inode->i_mode))
filemap_write_and_wait(dentry->d_inode->i_mapping);
retval = p9_client_setattr(fid, &p9attr);
if (retval < 0)
return retval;
if ((iattr->ia_valid & ATTR_SIZE) &&
iattr->ia_size != i_size_read(dentry->d_inode))
truncate_setsize(dentry->d_inode, iattr->ia_size);
v9fs_invalidate_inode_attr(dentry->d_inode);
setattr_copy(dentry->d_inode, iattr);
mark_inode_dirty(dentry->d_inode);
if (iattr->ia_valid & ATTR_MODE) {
/* We also want to update ACL when we update mode bits */
retval = v9fs_acl_chmod(dentry);
if (retval < 0)
return retval;
}
return 0;
}
/*
* v9fs_xattr_get()
*
* Copy an extended attribute into the buffer
* provided, or compute the buffer size required.
* Buffer is NULL to compute the size of the buffer required.
*
* Returns a negative error number on failure, or the number of bytes
* used / required on success.
*/
ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
void *buffer, size_t buffer_size)
{
struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu\n",
__func__, name, buffer_size);
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
return v9fs_fid_xattr_get(fid, name, buffer, buffer_size);
}
static int
v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
int err;
struct v9fs_session_info *v9ses;
struct p9_fid *fid;
struct p9_stat_dotl *st;
P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
err = -EPERM;
v9ses = v9fs_dentry2v9ses(dentry);
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
generic_fillattr(dentry->d_inode, stat);
return 0;
}
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
/* Ask for all the fields in stat structure. Server will return
* whatever it supports
*/
st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
if (IS_ERR(st))
return PTR_ERR(st);
v9fs_stat2inode_dotl(st, dentry->d_inode);
generic_fillattr(dentry->d_inode, stat);
/* Change block size to what the server returned */
stat->blksize = st->st_blksize;
kfree(st);
return 0;
}
/**
* v9fs_vfs_mknod_dotl - create a special file
* @dir: inode destination for new link
* @dentry: dentry for file
* @mode: mode for creation
* @rdev: device associated with special file
*
*/
static int
v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
dev_t rdev)
{
int err;
gid_t gid;
char *name;
mode_t mode;
struct v9fs_session_info *v9ses;
struct p9_fid *fid = NULL, *dfid = NULL;
struct inode *inode;
struct p9_qid qid;
struct dentry *dir_dentry;
struct posix_acl *dacl = NULL, *pacl = NULL;
P9_DPRINTK(P9_DEBUG_VFS,
" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
if (!new_valid_dev(rdev))
return -EINVAL;
v9ses = v9fs_inode2v9ses(dir);
dir_dentry = v9fs_dentry_from_dir_inode(dir);
dfid = v9fs_fid_lookup(dir_dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
dfid = NULL;
goto error;
}
gid = v9fs_get_fsgid_for_create(dir);
mode = omode;
/* Update mode based on ACL value */
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS,
"Failed to get acl values in mknod %d\n", err);
goto error;
}
name = (char *) dentry->d_name.name;
err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
if (err < 0)
goto error;
v9fs_invalidate_inode_attr(dir);
/* instantiate inode and assign the unopened fid to the dentry */
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
fid = p9_client_walk(dfid, 1, &name, 1);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
err);
fid = NULL;
goto error;
}
inode = v9fs_get_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);
goto error;
}
d_instantiate(dentry, inode);
err = v9fs_fid_add(dentry, fid);
if (err < 0)
goto error;
fid = NULL;
} else {
/*
* Not in cached mode. No need to populate inode with stat.
* socket syscall returns a fd, so we need instantiate
*/
inode = v9fs_get_inode(dir->i_sb, mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto error;
}
d_instantiate(dentry, inode);
}
/* Now set the ACL based on the default value */
v9fs_set_create_acl(dentry, dacl, pacl);
error:
if (fid)
p9_client_clunk(fid);
return err;
}
static int
v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
const char *symname)
{
int err;
gid_t gid;
char *name;
struct p9_qid qid;
struct inode *inode;
struct p9_fid *dfid;
struct p9_fid *fid = NULL;
struct v9fs_session_info *v9ses;
name = (char *) dentry->d_name.name;
P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
dir->i_ino, name, symname);
v9ses = v9fs_inode2v9ses(dir);
dfid = v9fs_fid_lookup(dentry->d_parent);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
return err;
}
gid = v9fs_get_fsgid_for_create(dir);
/* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
if (err < 0) {
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
goto error;
}
v9fs_invalidate_inode_attr(dir);
if (v9ses->cache) {
/* Now walk from the parent so we can get an unopened fid. */
fid = p9_client_walk(dfid, 1, &name, 1);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
err);
fid = NULL;
goto error;
}
/* instantiate inode and assign the unopened fid to dentry */
inode = v9fs_get_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);
goto error;
}
d_instantiate(dentry, inode);
err = v9fs_fid_add(dentry, fid);
if (err < 0)
goto error;
fid = NULL;
} else {
/* Not in cached mode. No need to populate inode with stat */
inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto error;
}
d_instantiate(dentry, inode);
}
error:
if (fid)
p9_client_clunk(fid);
return err;
}
static int v9fs_vfs_mkdir_dotl(struct inode *dir,
struct dentry *dentry, int omode)
{
int err;
struct v9fs_session_info *v9ses;
struct p9_fid *fid = NULL, *dfid = NULL;
gid_t gid;
char *name;
mode_t mode;
struct inode *inode;
struct p9_qid qid;
struct dentry *dir_dentry;
struct posix_acl *dacl = NULL, *pacl = NULL;
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
err = 0;
v9ses = v9fs_inode2v9ses(dir);
omode |= S_IFDIR;
if (dir->i_mode & S_ISGID)
omode |= S_ISGID;
dir_dentry = v9fs_dentry_from_dir_inode(dir);
dfid = v9fs_fid_lookup(dir_dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
dfid = NULL;
goto error;
}
gid = v9fs_get_fsgid_for_create(dir);
mode = omode;
/* Update mode based on ACL value */
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS,
"Failed to get acl values in mkdir %d\n", err);
goto error;
}
name = (char *) dentry->d_name.name;
err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
if (err < 0)
goto error;
/* instantiate inode and assign the unopened fid to the dentry */
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
fid = p9_client_walk(dfid, 1, &name, 1);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
err);
fid = NULL;
goto error;
}
inode = v9fs_get_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);
goto error;
}
d_instantiate(dentry, inode);
err = v9fs_fid_add(dentry, fid);
if (err < 0)
goto error;
fid = NULL;
} else {
/*
* Not in cached mode. No need to populate
* inode with stat. We need to get an inode
* so that we can set the acl with dentry
*/
inode = v9fs_get_inode(dir->i_sb, mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto error;
}
d_instantiate(dentry, inode);
}
/* Now set the ACL based on the default value */
v9fs_set_create_acl(dentry, dacl, pacl);
inc_nlink(dir);
v9fs_invalidate_inode_attr(dir);
error:
if (fid)
p9_client_clunk(fid);
return err;
}
static int
v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
struct nameidata *nd)
{
int err = 0;
gid_t gid;
int flags;
mode_t mode;
char *name = NULL;
struct file *filp;
struct p9_qid qid;
struct inode *inode;
struct p9_fid *fid = NULL;
struct v9fs_inode *v9inode;
struct p9_fid *dfid, *ofid, *inode_fid;
struct v9fs_session_info *v9ses;
struct posix_acl *pacl = NULL, *dacl = NULL;
v9ses = v9fs_inode2v9ses(dir);
if (nd && nd->flags & LOOKUP_OPEN)
flags = nd->intent.open.flags - 1;
else {
/*
* create call without LOOKUP_OPEN is due
* to mknod of regular files. So use mknod
* operation.
*/
return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
}
name = (char *) dentry->d_name.name;
P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
"mode:0x%x\n", name, flags, omode);
dfid = v9fs_fid_lookup(dentry->d_parent);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
return err;
}
/* clone a fid to use for creation */
ofid = p9_client_walk(dfid, 0, NULL, 1);
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
return err;
}
gid = v9fs_get_fsgid_for_create(dir);
mode = omode;
/* Update mode based on ACL value */
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS,
"Failed to get acl values in creat %d\n", err);
goto error;
}
err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
if (err < 0) {
P9_DPRINTK(P9_DEBUG_VFS,
"p9_client_open_dotl failed in creat %d\n",
err);
goto error;
}
v9fs_invalidate_inode_attr(dir);
/* instantiate inode and assign the unopened fid to the dentry */
fid = p9_client_walk(dfid, 1, &name, 1);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
fid = NULL;
goto error;
}
inode = v9fs_get_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);
goto error;
}
d_instantiate(dentry, inode);
err = v9fs_fid_add(dentry, fid);
if (err < 0)
goto error;
/* Now set the ACL based on the default value */
v9fs_set_create_acl(dentry, dacl, pacl);
v9inode = V9FS_I(inode);
mutex_lock(&v9inode->v_mutex);
if (v9ses->cache && !v9inode->writeback_fid &&
((flags & O_ACCMODE) != O_RDONLY)) {
/*
* clone a fid and add it to writeback_fid
* we do it during open time instead of
* page dirty time via write_begin/page_mkwrite
* because we want write after unlink usecase
* to work.
*/
inode_fid = v9fs_writeback_fid(dentry);
if (IS_ERR(inode_fid)) {
err = PTR_ERR(inode_fid);
mutex_unlock(&v9inode->v_mutex);
goto error;
}
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
if (IS_ERR(filp)) {
p9_client_clunk(ofid);
return PTR_ERR(filp);
}
filp->private_data = ofid;
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache)
v9fs_cache_inode_set_cookie(inode, filp);
#endif
return 0;
error:
if (ofid)
p9_client_clunk(ofid);
if (fid)
p9_client_clunk(fid);
return err;
}