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Diffstat (limited to 'fs/smb/client/link.c')
-rw-r--r--fs/smb/client/link.c125
1 files changed, 62 insertions, 63 deletions
diff --git a/fs/smb/client/link.c b/fs/smb/client/link.c
index c66be4904e1f..fdfdc9a3abdd 100644
--- a/fs/smb/client/link.c
+++ b/fs/smb/client/link.c
@@ -5,6 +5,7 @@
* Author(s): Steve French (sfrench@us.ibm.com)
*
*/
+#include <crypto/md5.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/slab.h>
@@ -18,6 +19,8 @@
#include "cifs_unicode.h"
#include "smb2proto.h"
#include "cifs_ioctl.h"
+#include "fs_context.h"
+#include "reparse.h"
/*
* M-F Symlink Functions - Begin
@@ -35,35 +38,6 @@
#define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) md5_hash
static int
-symlink_hash(unsigned int link_len, const char *link_str, u8 *md5_hash)
-{
- int rc;
- struct shash_desc *md5 = NULL;
-
- rc = cifs_alloc_hash("md5", &md5);
- if (rc)
- goto symlink_hash_err;
-
- rc = crypto_shash_init(md5);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not init md5 shash\n", __func__);
- goto symlink_hash_err;
- }
- rc = crypto_shash_update(md5, link_str, link_len);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
- goto symlink_hash_err;
- }
- rc = crypto_shash_final(md5, md5_hash);
- if (rc)
- cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
-
-symlink_hash_err:
- cifs_free_hash(&md5);
- return rc;
-}
-
-static int
parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
char **_link_str)
{
@@ -87,11 +61,7 @@ parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
return -EINVAL;
- rc = symlink_hash(link_len, link_str, md5_hash);
- if (rc) {
- cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
- return rc;
- }
+ md5(link_str, link_len, md5_hash);
scnprintf(md5_str2, sizeof(md5_str2),
CIFS_MF_SYMLINK_MD5_FORMAT,
@@ -113,7 +83,6 @@ parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
static int
format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str)
{
- int rc;
unsigned int link_len;
unsigned int ofs;
u8 md5_hash[16];
@@ -126,11 +95,7 @@ format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str)
if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
return -ENAMETOOLONG;
- rc = symlink_hash(link_len, link_str, md5_hash);
- if (rc) {
- cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
- return rc;
- }
+ md5(link_str, link_len, md5_hash);
scnprintf(buf, buf_len,
CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
@@ -195,7 +160,8 @@ create_mf_symlink(const unsigned int xid, struct cifs_tcon *tcon,
goto out;
if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE)
- rc = -EIO;
+ rc = smb_EIO2(smb_eio_trace_symlink_file_size,
+ bytes_written, CIFS_MF_SYMLINK_FILE_SIZE);
out:
kfree(buf);
return rc;
@@ -269,7 +235,7 @@ cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_open_parms oparms;
struct cifs_io_parms io_parms = {0};
int buf_type = CIFS_NO_BUFFER;
- FILE_ALL_INFO file_info;
+ struct cifs_open_info_data query_data;
oparms = (struct cifs_open_parms) {
.tcon = tcon,
@@ -281,11 +247,11 @@ cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
.fid = &fid,
};
- rc = CIFS_open(xid, &oparms, &oplock, &file_info);
+ rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &query_data);
if (rc)
return rc;
- if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
+ if (query_data.fi.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
rc = -ENOENT;
/* it's not a symlink */
goto out;
@@ -324,7 +290,7 @@ cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
.fid = &fid,
};
- rc = CIFS_open(xid, &oparms, &oplock, NULL);
+ rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
if (rc)
return rc;
@@ -459,7 +425,8 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
/* Make sure we wrote all of the symlink data */
if ((rc == 0) && (*pbytes_written != CIFS_MF_SYMLINK_FILE_SIZE))
- rc = -EIO;
+ rc = smb_EIO2(smb_eio_trace_short_symlink_write,
+ *pbytes_written, CIFS_MF_SYMLINK_FILE_SIZE);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
@@ -486,7 +453,7 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
struct cifsInodeInfo *cifsInode;
if (unlikely(cifs_forced_shutdown(cifs_sb)))
- return -EIO;
+ return smb_EIO(smb_eio_trace_forced_shutdown);
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
@@ -522,8 +489,8 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
rc = -ENOSYS;
goto cifs_hl_exit;
}
- rc = server->ops->create_hardlink(xid, tcon, from_name, to_name,
- cifs_sb);
+ rc = server->ops->create_hardlink(xid, tcon, old_file,
+ from_name, to_name, cifs_sb);
if ((rc == -EIO) || (rc == -EINVAL))
rc = -EOPNOTSUPP;
}
@@ -588,7 +555,7 @@ cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
struct inode *newinode = NULL;
if (unlikely(cifs_forced_shutdown(cifs_sb)))
- return -EIO;
+ return smb_EIO(smb_eio_trace_forced_shutdown);
page = alloc_dentry_path();
if (!page)
@@ -599,6 +566,7 @@ cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink)) {
rc = PTR_ERR(tlink);
+ /* BB could be clearer if skipped put_tlink on error here, but harmless */
goto symlink_exit;
}
pTcon = tlink_tcon(tlink);
@@ -613,27 +581,58 @@ cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
cifs_dbg(FYI, "symname is %s\n", symname);
/* BB what if DFS and this volume is on different share? BB */
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
- rc = create_mf_symlink(xid, pTcon, cifs_sb, full_path, symname);
+ rc = -EOPNOTSUPP;
+ switch (cifs_symlink_type(cifs_sb)) {
+ case CIFS_SYMLINK_TYPE_UNIX:
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
- else if (pTcon->unix_ext)
- rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
- cifs_sb->local_nls,
- cifs_remap(cifs_sb));
+ if (pTcon->unix_ext) {
+ rc = CIFSUnixCreateSymLink(xid, pTcon, full_path,
+ symname,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ }
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
- /* else
- rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,
- cifs_sb_target->local_nls); */
+ break;
+
+ case CIFS_SYMLINK_TYPE_MFSYMLINKS:
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
+ rc = create_mf_symlink(xid, pTcon, cifs_sb,
+ full_path, symname);
+ }
+ break;
+
+ case CIFS_SYMLINK_TYPE_SFU:
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+ rc = __cifs_sfu_make_node(xid, inode, direntry, pTcon,
+ full_path, S_IFLNK,
+ 0, symname);
+ }
+ break;
+
+ case CIFS_SYMLINK_TYPE_NATIVE:
+ case CIFS_SYMLINK_TYPE_NFS:
+ case CIFS_SYMLINK_TYPE_WSL:
+ if (CIFS_REPARSE_SUPPORT(pTcon)) {
+ rc = create_reparse_symlink(xid, inode, direntry, pTcon,
+ full_path, symname);
+ goto symlink_exit;
+ }
+ break;
+ default:
+ break;
+ }
if (rc == 0) {
- if (pTcon->posix_extensions)
- rc = smb311_posix_get_inode_info(&newinode, full_path, inode->i_sb, xid);
- else if (pTcon->unix_ext)
+ if (pTcon->posix_extensions) {
+ rc = smb311_posix_get_inode_info(&newinode, full_path,
+ NULL, inode->i_sb, xid);
+ } else if (pTcon->unix_ext) {
rc = cifs_get_inode_info_unix(&newinode, full_path,
inode->i_sb, xid);
- else
+ } else {
rc = cifs_get_inode_info(&newinode, full_path, NULL,
inode->i_sb, xid, NULL);
+ }
if (rc != 0) {
cifs_dbg(FYI, "Create symlink ok, getinodeinfo fail rc = %d\n",
generated by cgit (git 2.34.1) at 2025-12-24 21:25:27 +0000