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Diffstat (limited to 'fs/smb/server/vfs.c')
-rw-r--r--fs/smb/server/vfs.c97
1 files changed, 38 insertions, 59 deletions
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index 6890016e1923..58ee06814bd2 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -4,6 +4,7 @@
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
*/
+#include <crypto/sha2.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/filelock.h>
@@ -113,11 +114,6 @@ static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf,
if (IS_ERR(d))
goto err_out;
- if (d_is_negative(d)) {
- dput(d);
- goto err_out;
- }
-
path->dentry = d;
path->mnt = mntget(parent_path->mnt);
@@ -211,8 +207,8 @@ int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
{
struct mnt_idmap *idmap;
struct path path;
- struct dentry *dentry;
- int err;
+ struct dentry *dentry, *d;
+ int err = 0;
dentry = ksmbd_vfs_kern_path_create(work, name,
LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
@@ -227,27 +223,15 @@ int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
idmap = mnt_idmap(path.mnt);
mode |= S_IFDIR;
- err = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode);
- if (!err && d_unhashed(dentry)) {
- struct dentry *d;
-
- d = lookup_one(idmap, dentry->d_name.name, dentry->d_parent,
- dentry->d_name.len);
- if (IS_ERR(d)) {
- err = PTR_ERR(d);
- goto out_err;
- }
- if (unlikely(d_is_negative(d))) {
- dput(d);
- err = -ENOENT;
- goto out_err;
- }
-
- ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d));
- dput(d);
- }
+ d = dentry;
+ dentry = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode);
+ if (IS_ERR(dentry))
+ err = PTR_ERR(dentry);
+ else if (d_is_negative(dentry))
+ err = -ENOENT;
+ if (!err && dentry != d)
+ ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(dentry));
-out_err:
done_path_create(&path, dentry);
if (err)
pr_err("mkdir(%s): creation failed (err:%d)\n", name, err);
@@ -309,6 +293,7 @@ static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos,
if (v_len - *pos < count)
count = v_len - *pos;
+ fp->stream.pos = v_len;
memcpy(buf, &stream_buf[*pos], count);
@@ -426,10 +411,15 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n",
*pos, count);
+ if (*pos >= XATTR_SIZE_MAX) {
+ pr_err("stream write position %lld is out of bounds\n", *pos);
+ return -EINVAL;
+ }
+
size = *pos + count;
if (size > XATTR_SIZE_MAX) {
size = XATTR_SIZE_MAX;
- count = (*pos + count) - XATTR_SIZE_MAX;
+ count = XATTR_SIZE_MAX - *pos;
}
v_len = ksmbd_vfs_getcasexattr(idmap,
@@ -467,8 +457,8 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
true);
if (err < 0)
goto out;
-
- fp->filp->f_pos = *pos;
+ else
+ fp->stream.pos = size;
err = 0;
out:
kvfree(stream_buf);
@@ -496,7 +486,8 @@ int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
int err = 0;
if (work->conn->connection_type) {
- if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {
+ if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE)) ||
+ S_ISDIR(file_inode(fp->filp)->i_mode)) {
pr_err("no right to write(%pD)\n", fp->filp);
err = -EACCES;
goto out;
@@ -557,7 +548,8 @@ int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat)
{
int err;
- err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT);
+ err = vfs_getattr(path, stat, STATX_BASIC_STATS | STATX_BTIME,
+ AT_STATX_SYNC_AS_STAT);
if (err)
pr_err("getattr failed, err %d\n", err);
return err;
@@ -693,6 +685,7 @@ int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path,
struct ksmbd_file *parent_fp;
int new_type;
int err, lookup_flags = LOOKUP_NO_SYMLINKS;
+ int target_lookup_flags = LOOKUP_RENAME_TARGET | LOOKUP_CREATE;
if (ksmbd_override_fsids(work))
return -ENOMEM;
@@ -703,6 +696,14 @@ int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path,
goto revert_fsids;
}
+ /*
+ * explicitly handle file overwrite case, for compatibility with
+ * filesystems that may not support rename flags (e.g: fuse)
+ */
+ if (flags & RENAME_NOREPLACE)
+ target_lookup_flags |= LOOKUP_EXCL;
+ flags &= ~(RENAME_NOREPLACE);
+
retry:
err = vfs_path_parent_lookup(to, lookup_flags | LOOKUP_BENEATH,
&new_path, &new_last, &new_type,
@@ -743,7 +744,7 @@ retry:
}
new_dentry = lookup_one_qstr_excl(&new_last, new_path.dentry,
- lookup_flags | LOOKUP_RENAME_TARGET);
+ lookup_flags | target_lookup_flags);
if (IS_ERR(new_dentry)) {
err = PTR_ERR(new_dentry);
goto out3;
@@ -754,16 +755,6 @@ retry:
goto out4;
}
- /*
- * explicitly handle file overwrite case, for compatibility with
- * filesystems that may not support rename flags (e.g: fuse)
- */
- if ((flags & RENAME_NOREPLACE) && d_is_positive(new_dentry)) {
- err = -EEXIST;
- goto out4;
- }
- flags &= ~(RENAME_NOREPLACE);
-
if (old_child == trap) {
err = -EINVAL;
goto out4;
@@ -1292,6 +1283,7 @@ out1:
err = ksmbd_vfs_lock_parent(parent_path->dentry, path->dentry);
if (err) {
+ mnt_drop_write(parent_path->mnt);
path_put(path);
path_put(parent_path);
}
@@ -1488,11 +1480,7 @@ int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
acl.sd_buf = (char *)pntsd;
acl.sd_size = len;
- rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash);
- if (rc) {
- pr_err("failed to generate hash for ndr acl\n");
- return rc;
- }
+ sha256(acl.sd_buf, acl.sd_size, acl.hash);
smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,
ACL_TYPE_ACCESS);
@@ -1507,12 +1495,7 @@ int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
goto out;
}
- rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset,
- acl.posix_acl_hash);
- if (rc) {
- pr_err("failed to generate hash for ndr acl\n");
- goto out;
- }
+ sha256(acl_ndr.data, acl_ndr.offset, acl.posix_acl_hash);
rc = ndr_encode_v4_ntacl(&sd_ndr, &acl);
if (rc) {
@@ -1569,11 +1552,7 @@ int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
goto out_free;
}
- rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash);
- if (rc) {
- pr_err("failed to generate hash for ndr acl\n");
- goto out_free;
- }
+ sha256(acl_ndr.data, acl_ndr.offset, cmp_hash);
if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) {
pr_err("hash value diff\n");
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-21 06:23:29 +0300