instead of removing '..' in a given path, call
kern_path with LOOKUP_BENEATH flag to prevent
the out of share access.
ran various test on this:
smb2-cat-async smb://127.0.0.1/homes/../out_of_share
smb2-cat-async smb://127.0.0.1/homes/foo/../../out_of_share
smbclient //127.0.0.1/homes -c "mkdir ../foo2"
smbclient //127.0.0.1/homes -c "rename bar ../bar"
Cc: Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx>
Cc: Ralph Boehme <slow@xxxxxxxxx>
Cc: Steve French <smfrench@xxxxxxxxx>
Cc: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Hyunchul Lee <hyc.lee@xxxxxxxxx>
---
Changes from v1:
- pass path of file that is relative to share to ksmbd vfs functions.
Changes from v2:
- fix smbtorture smb2.streams.rename, smb2.streams.rename2 failure
fs/ksmbd/misc.c | 100 ++++++----------------------
fs/ksmbd/misc.h | 7 +-
fs/ksmbd/smb2pdu.c | 74 ++++++++-------------
fs/ksmbd/vfs.c | 162 ++++++++++++++++++++++++---------------------
fs/ksmbd/vfs.h | 9 ++-
5 files changed, 143 insertions(+), 209 deletions(-)
diff --git a/fs/ksmbd/misc.c b/fs/ksmbd/misc.c
index 3eac3c01749f..6a19f4bc692d 100644
--- a/fs/ksmbd/misc.c
+++ b/fs/ksmbd/misc.c
@@ -158,25 +158,21 @@ int parse_stream_name(char *filename, char **stream_name, int *s_type)
* Return : windows path string or error
*/
-char *convert_to_nt_pathname(char *filename, char *sharepath)
+char *convert_to_nt_pathname(char *filename)
{
char *ab_pathname;
- int len, name_len;
- name_len = strlen(filename);
- ab_pathname = kmalloc(name_len, GFP_KERNEL);
- if (!ab_pathname)
- return NULL;
-
- ab_pathname[0] = '\\';
- ab_pathname[1] = '\0';
+ if (strlen(filename) == 0) {
+ ab_pathname = kmalloc(2, GFP_KERNEL);
+ ab_pathname[0] = '\\';
+ ab_pathname[1] = '\0';
+ } else {
+ ab_pathname = kstrdup(filename, GFP_KERNEL);
+ if (!ab_pathname)
+ return NULL;
- len = strlen(sharepath);
- if (!strncmp(filename, sharepath, len) && name_len != len) {
- strscpy(ab_pathname, &filename[len], name_len);
ksmbd_conv_path_to_windows(ab_pathname);
}
-
return ab_pathname;
}
@@ -191,77 +187,19 @@ int get_nlink(struct kstat *st)
return nlink;
}
-char *ksmbd_conv_path_to_unix(char *path)
+void ksmbd_conv_path_to_unix(char *path)
{
- size_t path_len, remain_path_len, out_path_len;
- char *out_path, *out_next;
- int i, pre_dotdot_cnt = 0, slash_cnt = 0;
- bool is_last;
-
strreplace(path, '\\', '/');
- path_len = strlen(path);
- remain_path_len = path_len;
- if (path_len == 0)
- return ERR_PTR(-EINVAL);
-
- out_path = kzalloc(path_len + 2, GFP_KERNEL);
- if (!out_path)
- return ERR_PTR(-ENOMEM);
- out_path_len = 0;
- out_next = out_path;
-
- do {
- char *name = path + path_len - remain_path_len;
- char *next = strchrnul(name, '/');
- size_t name_len = next - name;
-
- is_last = !next[0];
- if (name_len == 2 && name[0] == '.' && name[1] == '.') {
- pre_dotdot_cnt++;
- /* handle the case that path ends with "/.." */
- if (is_last)
- goto follow_dotdot;
- } else {
- if (pre_dotdot_cnt) {
-follow_dotdot:
- slash_cnt = 0;
- for (i = out_path_len - 1; i >= 0; i--) {
- if (out_path[i] == '/' &&
- ++slash_cnt == pre_dotdot_cnt + 1)
- break;
- }
-
- if (i < 0 &&
- slash_cnt != pre_dotdot_cnt) {
- kfree(out_path);
- return ERR_PTR(-EINVAL);
- }
-
- out_next = &out_path[i+1];
- *out_next = '\0';
- out_path_len = i + 1;
-
- }
-
- if (name_len != 0 &&
- !(name_len == 1 && name[0] == '.') &&
- !(name_len == 2 && name[0] == '.' && name[1] == '.')) {
- next[0] = '\0';
- sprintf(out_next, "%s/", name);
- out_next += name_len + 1;
- out_path_len += name_len + 1;
- next[0] = '/';
- }
- pre_dotdot_cnt = 0;
- }
+}
- remain_path_len -= name_len + 1;
- } while (!is_last);
+void ksmbd_strip_last_slash(char *path)
+{
+ int len = strlen(path);
- if (out_path_len > 0)
- out_path[out_path_len-1] = '\0';
- path[path_len] = '\0';
- return out_path;
+ while (len && path[len - 1] == '/') {
+ path[len - 1] = '\0';
+ len--;
+ }
}
void ksmbd_conv_path_to_windows(char *path)
@@ -298,7 +236,7 @@ char *ksmbd_extract_sharename(char *treename)
*
* Return: converted name on success, otherwise NULL
*/
-char *convert_to_unix_name(struct ksmbd_share_config *share, char *name)
+char *convert_to_unix_name(struct ksmbd_share_config *share, const char *name)
{
int no_slash = 0, name_len, path_len;
char *new_name;
diff --git a/fs/ksmbd/misc.h b/fs/ksmbd/misc.h
index b7b10139ada2..253366bd0951 100644
--- a/fs/ksmbd/misc.h
+++ b/fs/ksmbd/misc.h
@@ -14,12 +14,13 @@ struct ksmbd_file;
int match_pattern(const char *str, size_t len, const char *pattern);
int ksmbd_validate_filename(char *filename);
int parse_stream_name(char *filename, char **stream_name, int *s_type);
-char *convert_to_nt_pathname(char *filename, char *sharepath);
+char *convert_to_nt_pathname(char *filename);
int get_nlink(struct kstat *st);
-char *ksmbd_conv_path_to_unix(char *path);
+void ksmbd_conv_path_to_unix(char *path);
+void ksmbd_strip_last_slash(char *path);
void ksmbd_conv_path_to_windows(char *path);
char *ksmbd_extract_sharename(char *treename);
-char *convert_to_unix_name(struct ksmbd_share_config *share, char *name);
+char *convert_to_unix_name(struct ksmbd_share_config *share, const char *name);
#define KSMBD_DIR_INFO_ALIGNMENT 8
struct ksmbd_dir_info;
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 9f45779c5f95..bb39b18a6673 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -643,7 +643,7 @@ static char *
smb2_get_name(struct ksmbd_share_config *share, const char *src,
const int maxlen, struct nls_table *local_nls)
{
- char *name, *norm_name, *unixname;
+ char *name;
name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
if (IS_ERR(name)) {
@@ -651,23 +651,9 @@ smb2_get_name(struct ksmbd_share_config *share, const char *src,
return name;
}
- /* change it to absolute unix name */
- norm_name = ksmbd_conv_path_to_unix(name);
- if (IS_ERR(norm_name)) {
- kfree(name);
- return norm_name;
- }
- kfree(name);
-
- unixname = convert_to_unix_name(share, norm_name);
- kfree(norm_name);
- if (!unixname) {
- pr_err("can not convert absolute name\n");
- return ERR_PTR(-ENOMEM);
- }
-
- ksmbd_debug(SMB, "absolute name = %s\n", unixname);
- return unixname;
+ ksmbd_conv_path_to_unix(name);
+ ksmbd_strip_last_slash(name);
+ return name;
}
int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
@@ -2412,7 +2398,7 @@ static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
return rc;
}
- rc = ksmbd_vfs_kern_path(name, 0, path, 0);
+ rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
if (rc) {
pr_err("cannot get linux path (%s), err = %d\n",
name, rc);
@@ -2487,7 +2473,7 @@ int smb2_open(struct ksmbd_work *work)
struct oplock_info *opinfo;
__le32 *next_ptr = NULL;
int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
- int rc = 0, len = 0;
+ int rc = 0;
int contxt_cnt = 0, query_disk_id = 0;
int maximal_access_ctxt = 0, posix_ctxt = 0;
int s_type = 0;
@@ -2559,17 +2545,11 @@ int smb2_open(struct ksmbd_work *work)
goto err_out1;
}
} else {
- len = strlen(share->path);
- ksmbd_debug(SMB, "share path len %d\n", len);
- name = kmalloc(len + 1, GFP_KERNEL);
+ name = kstrdup("", GFP_KERNEL);
if (!name) {
- rsp->hdr.Status = STATUS_NO_MEMORY;
rc = -ENOMEM;
goto err_out1;
}
-
- memcpy(name, share->path, len);
- *(name + len) = '\0';
}
req_op_level = req->RequestedOplockLevel;
@@ -2692,7 +2672,7 @@ int smb2_open(struct ksmbd_work *work)
goto err_out1;
}
- rc = ksmbd_vfs_kern_path(name, LOOKUP_NO_SYMLINKS, &path, 1);
+ rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
if (!rc) {
if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
/*
@@ -2721,11 +2701,8 @@ int smb2_open(struct ksmbd_work *work)
}
if (rc) {
- if (rc == -EACCES) {
- ksmbd_debug(SMB,
- "User does not have right permission\n");
+ if (rc != -ENOENT)
goto err_out;
- }
ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
name, rc);
rc = 0;
@@ -3229,7 +3206,7 @@ int smb2_open(struct ksmbd_work *work)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
- else if (rc == -EACCES || rc == -ESTALE)
+ else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
@@ -4345,8 +4322,7 @@ static int get_file_all_info(struct ksmbd_work *work,
return -EACCES;
}
- filename = convert_to_nt_pathname(fp->filename,
- work->tcon->share_conf->path);
+ filename = convert_to_nt_pathname(fp->filename);
if (!filename)
return -ENOMEM;
@@ -4801,7 +4777,7 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,
int rc = 0, len;
int fs_infoclass_size = 0;
- rc = ksmbd_vfs_kern_path(share->path, LOOKUP_NO_SYMLINKS, &path, 0);
+ rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
if (rc) {
pr_err("cannot create vfs path\n");
return -EIO;
@@ -5350,7 +5326,7 @@ static int smb2_rename(struct ksmbd_work *work,
goto out;
len = strlen(new_name);
- if (new_name[len - 1] != '/') {
+ if (len > 0 && new_name[len - 1] != '/') {
pr_err("not allow base filename in rename\n");
rc = -ESHARE;
goto out;
@@ -5378,11 +5354,14 @@ static int smb2_rename(struct ksmbd_work *work,
}
ksmbd_debug(SMB, "new name %s\n", new_name);
- rc = ksmbd_vfs_kern_path(new_name, LOOKUP_NO_SYMLINKS, &path, 1);
- if (rc)
+ rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
+ if (rc) {
+ if (rc != -ENOENT)
+ goto out;
file_present = false;
- else
+ } else {
path_put(&path);
+ }
if (ksmbd_share_veto_filename(share, new_name)) {
rc = -ENOENT;
@@ -5456,11 +5435,14 @@ static int smb2_create_link(struct ksmbd_work *work,
}
ksmbd_debug(SMB, "target name is %s\n", target_name);
- rc = ksmbd_vfs_kern_path(link_name, LOOKUP_NO_SYMLINKS, &path, 0);
- if (rc)
+ rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
+ if (rc) {
+ if (rc != -ENOENT)
+ goto out;
file_present = false;
- else
+ } else {
path_put(&path);
+ }
if (file_info->ReplaceIfExists) {
if (file_present) {
@@ -5618,7 +5600,7 @@ static int set_file_allocation_info(struct ksmbd_work *work,
* inode size is retained by backup inode size.
*/
size = i_size_read(inode);
- rc = ksmbd_vfs_truncate(work, NULL, fp, alloc_blks * 512);
+ rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
if (rc) {
pr_err("truncate failed! filename : %s, err %d\n",
fp->filename, rc);
@@ -5653,7 +5635,7 @@ static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
fp->filename, newsize);
- rc = ksmbd_vfs_truncate(work, NULL, fp, newsize);
+ rc = ksmbd_vfs_truncate(work, fp, newsize);
if (rc) {
ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
fp->filename, rc);
@@ -5975,7 +5957,7 @@ int smb2_set_info(struct ksmbd_work *work)
return 0;
err_out:
- if (rc == -EACCES || rc == -EPERM)
+ if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
diff --git a/fs/ksmbd/vfs.c b/fs/ksmbd/vfs.c
index 3733e4944c1d..809b6daf1fff 100644
--- a/fs/ksmbd/vfs.c
+++ b/fs/ksmbd/vfs.c
@@ -19,6 +19,8 @@
#include <linux/sched/xacct.h>
#include <linux/crc32c.h>
+#include "../internal.h" /* for vfs_path_lookup */
+
#include "glob.h"
#include "oplock.h"
#include "connection.h"
@@ -44,7 +46,6 @@ static char *extract_last_component(char *path)
p++;
} else {
p = NULL;
- pr_err("Invalid path %s\n", path);
}
return p;
}
@@ -155,7 +156,7 @@ int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
/**
* ksmbd_vfs_create() - vfs helper for smb create file
* @work: work
- * @name: file name
+ * @name: file name that is relative to share
* @mode: file create mode
*
* Return: 0 on success, otherwise error
@@ -166,7 +167,8 @@ int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)
struct dentry *dentry;
int err;
- dentry = kern_path_create(AT_FDCWD, name, &path, LOOKUP_NO_SYMLINKS);
+ dentry = ksmbd_vfs_kern_path_create(work, name,
+ LOOKUP_NO_SYMLINKS, &path);
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
if (err != -ENOENT)
@@ -191,7 +193,7 @@ int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)
/**
* ksmbd_vfs_mkdir() - vfs helper for smb create directory
* @work: work
- * @name: directory name
+ * @name: directory name that is relative to share
* @mode: directory create mode
*
* Return: 0 on success, otherwise error
@@ -203,8 +205,9 @@ int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
struct dentry *dentry;
int err;
- dentry = kern_path_create(AT_FDCWD, name, &path,
- LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY);
+ dentry = ksmbd_vfs_kern_path_create(work, name,
+ LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
+ &path);
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
if (err != -EEXIST)
@@ -579,7 +582,7 @@ int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id)
/**
* ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink
- * @name: absolute directory or file name
+ * @name: directory or file name that is relative to share
*
* Return: 0 on success, otherwise error
*/
@@ -593,7 +596,7 @@ int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
if (ksmbd_override_fsids(work))
return -ENOMEM;
- err = kern_path(name, LOOKUP_NO_SYMLINKS, &path);
+ err = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, false);
if (err) {
ksmbd_debug(VFS, "can't get %s, err %d\n", name, err);
ksmbd_revert_fsids(work);
@@ -638,7 +641,7 @@ int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
/**
* ksmbd_vfs_link() - vfs helper for creating smb hardlink
* @oldname: source file name
- * @newname: hardlink name
+ * @newname: hardlink name that is relative to share
*
* Return: 0 on success, otherwise error
*/
@@ -659,8 +662,9 @@ int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname,
goto out1;
}
- dentry = kern_path_create(AT_FDCWD, newname, &newpath,
- LOOKUP_NO_SYMLINKS | LOOKUP_REVAL);
+ dentry = ksmbd_vfs_kern_path_create(work, newname,
+ LOOKUP_NO_SYMLINKS | LOOKUP_REVAL,
+ &newpath);
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
pr_err("path create err for %s, err %d\n", newname, err);
@@ -781,14 +785,17 @@ int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
int err;
dst_name = extract_last_component(newname);
- if (!dst_name)
- return -EINVAL;
+ if (!dst_name) {
+ dst_name = newname;
+ newname = "";
+ }
src_dent_parent = dget_parent(fp->filp->f_path.dentry);
src_dent = fp->filp->f_path.dentry;
- err = kern_path(newname, LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
- &dst_path);
+ err = ksmbd_vfs_kern_path(work, newname,
+ LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
+ &dst_path, false);
if (err) {
ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err);
goto out;
@@ -834,61 +841,43 @@ int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
/**
* ksmbd_vfs_truncate() - vfs helper for smb file truncate
* @work: work
- * @name: old filename
* @fid: file id of old file
* @size: truncate to given size
*
* Return: 0 on success, otherwise error
*/
-int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name,
+int ksmbd_vfs_truncate(struct ksmbd_work *work,
struct ksmbd_file *fp, loff_t size)
{
- struct path path;
int err = 0;
+ struct file *filp;
- if (name) {
- err = kern_path(name, LOOKUP_NO_SYMLINKS, &path);
- if (err) {
- pr_err("cannot get linux path for %s, err %d\n",
- name, err);
- return err;
- }
- err = vfs_truncate(&path, size);
- if (err)
- pr_err("truncate failed for %s err %d\n",
- name, err);
- path_put(&path);
- } else {
- struct file *filp;
-
- filp = fp->filp;
-
- /* Do we need to break any of a levelII oplock? */
- smb_break_all_levII_oplock(work, fp, 1);
+ filp = fp->filp;
- if (!work->tcon->posix_extensions) {
- struct inode *inode = file_inode(filp);
+ /* Do we need to break any of a levelII oplock? */
+ smb_break_all_levII_oplock(work, fp, 1);
- if (size < inode->i_size) {
- err = check_lock_range(filp, size,
- inode->i_size - 1, WRITE);
- } else {
- err = check_lock_range(filp, inode->i_size,
- size - 1, WRITE);
- }
+ if (!work->tcon->posix_extensions) {
+ struct inode *inode = file_inode(filp);
- if (err) {
- pr_err("failed due to lock\n");
- return -EAGAIN;
- }
+ if (size < inode->i_size) {
+ err = check_lock_range(filp, size,
+ inode->i_size - 1, WRITE);
+ } else {
+ err = check_lock_range(filp, inode->i_size,
+ size - 1, WRITE);
}
- err = vfs_truncate(&filp->f_path, size);
- if (err)
- pr_err("truncate failed for filename : %s err %d\n",
- fp->filename, err);
+ if (err) {
+ pr_err("failed due to lock\n");
+ return -EAGAIN;
+ }
}
+ err = vfs_truncate(&filp->f_path, size);
+ if (err)
+ pr_err("truncate failed for filename : %s err %d\n",
+ fp->filename, err);
return err;
}
@@ -1206,27 +1195,30 @@ static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen)
/**
* ksmbd_vfs_kern_path() - lookup a file and get path info
- * @name: name of file for lookup
+ * @name: file path that is relative to share
* @flags: lookup flags
* @path: if lookup succeed, return path info
* @caseless: caseless filename lookup
*
* Return: 0 on success, otherwise error
*/
-int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
- bool caseless)
+int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name,
+ unsigned int flags, struct path *path, bool caseless)
{
+ struct ksmbd_share_config *share_conf = work->tcon->share_conf;
+ char *filepath;
int err;
- if (name[0] != '/')
- return -EINVAL;
-
- err = kern_path(name, flags, path);
+ flags |= LOOKUP_BENEATH;
+ err = vfs_path_lookup(share_conf->vfs_path.dentry,
+ share_conf->vfs_path.mnt,
+ name,
+ flags,
+ path);
if (!err)
return 0;
if (caseless) {
- char *filepath;
struct path parent;
size_t path_len, remain_len;
@@ -1235,11 +1227,10 @@ int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
return -ENOMEM;
path_len = strlen(filepath);
- remain_len = path_len - 1;
+ remain_len = path_len;
- err = kern_path("/", flags, &parent);
- if (err)
- goto out;
+ parent = share_conf->vfs_path;
+ path_get(&parent);
while (d_can_lookup(parent.dentry)) {
char *filename = filepath + path_len - remain_len;
@@ -1252,21 +1243,21 @@ int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
err = ksmbd_vfs_lookup_in_dir(&parent, filename,
filename_len);
- if (err) {
- path_put(&parent);
+ path_put(&parent);
+ if (err)
goto out;
- }
- path_put(&parent);
next[0] = '\0';
- err = kern_path(filepath, flags, &parent);
+ err = vfs_path_lookup(share_conf->vfs_path.dentry,
+ share_conf->vfs_path.mnt,
+ filepath,
+ flags,
+ &parent);
if (err)
goto out;
-
- if (is_last) {
- path->mnt = parent.mnt;
- path->dentry = parent.dentry;
+ else if (is_last) {
+ *path = parent;
goto out;
}
@@ -1276,12 +1267,29 @@ int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
path_put(&parent);
err = -EINVAL;
-out:
- kfree(filepath);
}
+out:
+ kfree(filepath);
return err;
}
+struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
+ const char *name,
+ unsigned int flags,
+ struct path *path)
+{
+ char *abs_name;
+ struct dentry *dent;
+
+ abs_name = convert_to_unix_name(work->tcon->share_conf, name);
+ if (!abs_name)
+ return ERR_PTR(-ENOMEM);
+
+ dent = kern_path_create(AT_FDCWD, abs_name, path, flags);
+ kfree(abs_name);
+ return dent;
+}
+
int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns,
struct dentry *dentry)
{
diff --git a/fs/ksmbd/vfs.h b/fs/ksmbd/vfs.h
index 85db50abdb24..7b1dcaa3fbdc 100644
--- a/fs/ksmbd/vfs.h
+++ b/fs/ksmbd/vfs.h
@@ -126,7 +126,7 @@ int ksmbd_vfs_link(struct ksmbd_work *work,
int ksmbd_vfs_getattr(struct path *path, struct kstat *stat);
int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
char *newname);
-int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name,
+int ksmbd_vfs_truncate(struct ksmbd_work *work,
struct ksmbd_file *fp, loff_t size);
struct srv_copychunk;
int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
@@ -152,8 +152,13 @@ int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
size_t *xattr_stream_name_size, int s_type);
int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns,
struct dentry *dentry, char *attr_name);
-int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
+int ksmbd_vfs_kern_path(struct ksmbd_work *work,
+ char *name, unsigned int flags, struct path *path,
bool caseless);
+struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
+ const char *name,
+ unsigned int flags,
+ struct path *path);
int ksmbd_vfs_empty_dir(struct ksmbd_file *fp);
void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option);
int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
--
2.25.1
