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-rw-r--r--fs/smb/client/cifsfs.c16
-rw-r--r--fs/smb/client/cifsfs.h4
-rw-r--r--fs/smb/client/cifsglob.h2
-rw-r--r--fs/smb/client/cifsproto.h1
-rw-r--r--fs/smb/client/cifssmb.c22
-rw-r--r--fs/smb/client/connect.c15
-rw-r--r--fs/smb/client/dir.c6
-rw-r--r--fs/smb/client/file.c26
-rw-r--r--fs/smb/client/fs_context.c17
-rw-r--r--fs/smb/client/misc.c6
-rw-r--r--fs/smb/client/readdir.c2
-rw-r--r--fs/smb/client/reparse.c22
-rw-r--r--fs/smb/client/smb2inode.c3
-rw-r--r--fs/smb/client/smb2ops.c10
-rw-r--r--fs/smb/client/smb2pdu.c37
-rw-r--r--fs/smb/server/smb2pdu.c120
-rw-r--r--fs/smb/server/transport_rdma.c5
-rw-r--r--fs/smb/server/vfs.c243
-rw-r--r--fs/smb/server/vfs.h7
19 files changed, 313 insertions, 251 deletions
diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
index 0a5266ecfd15..0fdadd668a81 100644
--- a/fs/smb/client/cifsfs.c
+++ b/fs/smb/client/cifsfs.c
@@ -260,9 +260,9 @@ cifs_read_super(struct super_block *sb)
}
if (tcon->nocase)
- sb->s_d_op = &cifs_ci_dentry_ops;
+ set_default_d_op(sb, &cifs_ci_dentry_ops);
else
- sb->s_d_op = &cifs_dentry_ops;
+ set_default_d_op(sb, &cifs_dentry_ops);
sb->s_root = d_make_root(inode);
if (!sb->s_root) {
@@ -1525,7 +1525,7 @@ const struct file_operations cifs_file_ops = {
.flock = cifs_flock,
.fsync = cifs_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_mmap,
+ .mmap_prepare = cifs_file_mmap_prepare,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.llseek = cifs_llseek,
@@ -1545,7 +1545,7 @@ const struct file_operations cifs_file_strict_ops = {
.flock = cifs_flock,
.fsync = cifs_strict_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_strict_mmap,
+ .mmap_prepare = cifs_file_strict_mmap_prepare,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.llseek = cifs_llseek,
@@ -1565,7 +1565,7 @@ const struct file_operations cifs_file_direct_ops = {
.flock = cifs_flock,
.fsync = cifs_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_mmap,
+ .mmap_prepare = cifs_file_mmap_prepare,
.splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = cifs_ioctl,
@@ -1583,7 +1583,7 @@ const struct file_operations cifs_file_nobrl_ops = {
.release = cifs_close,
.fsync = cifs_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_mmap,
+ .mmap_prepare = cifs_file_mmap_prepare,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.llseek = cifs_llseek,
@@ -1601,7 +1601,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
.release = cifs_close,
.fsync = cifs_strict_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_strict_mmap,
+ .mmap_prepare = cifs_file_strict_mmap_prepare,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.llseek = cifs_llseek,
@@ -1619,7 +1619,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
.release = cifs_close,
.fsync = cifs_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_mmap,
+ .mmap_prepare = cifs_file_mmap_prepare,
.splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = cifs_ioctl,
diff --git a/fs/smb/client/cifsfs.h b/fs/smb/client/cifsfs.h
index b9ec9fe16a98..487f39cff77e 100644
--- a/fs/smb/client/cifsfs.h
+++ b/fs/smb/client/cifsfs.h
@@ -103,8 +103,8 @@ extern int cifs_lock(struct file *, int, struct file_lock *);
extern int cifs_fsync(struct file *, loff_t, loff_t, int);
extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
extern int cifs_flush(struct file *, fl_owner_t id);
-extern int cifs_file_mmap(struct file *file, struct vm_area_struct *vma);
-extern int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma);
+int cifs_file_mmap_prepare(struct vm_area_desc *desc);
+int cifs_file_strict_mmap_prepare(struct vm_area_desc *desc);
extern const struct file_operations cifs_dir_ops;
extern int cifs_readdir(struct file *file, struct dir_context *ctx);
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index 318a8405d475..89160bc34d35 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -777,6 +777,7 @@ struct TCP_Server_Info {
__le32 session_key_id; /* retrieved from negotiate response and send in session setup request */
struct session_key session_key;
unsigned long lstrp; /* when we got last response from this server */
+ unsigned long neg_start; /* when negotiate started (jiffies) */
struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
@@ -1303,6 +1304,7 @@ struct cifs_tcon {
bool use_persistent:1; /* use persistent instead of durable handles */
bool no_lease:1; /* Do not request leases on files or directories */
bool use_witness:1; /* use witness protocol */
+ bool dummy:1; /* dummy tcon used for reconnecting channels */
__le32 capabilities;
__u32 share_flags;
__u32 maximal_access;
diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h
index 66093fa78aed..045227ed4efc 100644
--- a/fs/smb/client/cifsproto.h
+++ b/fs/smb/client/cifsproto.h
@@ -136,6 +136,7 @@ extern int SendReceiveBlockingLock(const unsigned int xid,
struct smb_hdr *out_buf,
int *bytes_returned);
+void smb2_query_server_interfaces(struct work_struct *work);
void
cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
bool all_channels);
diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index 7216fcec79e8..75142f49d65d 100644
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -1334,7 +1334,12 @@ cifs_readv_callback(struct mid_q_entry *mid)
cifs_stats_bytes_read(tcon, rdata->got_bytes);
break;
case MID_REQUEST_SUBMITTED:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_req_submitted);
+ goto do_retry;
case MID_RETRY_NEEDED:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_retry_needed);
+do_retry:
+ __set_bit(NETFS_SREQ_NEED_RETRY, &rdata->subreq.flags);
rdata->result = -EAGAIN;
if (server->sign && rdata->got_bytes)
/* reset bytes number since we can not check a sign */
@@ -1343,8 +1348,14 @@ cifs_readv_callback(struct mid_q_entry *mid)
task_io_account_read(rdata->got_bytes);
cifs_stats_bytes_read(tcon, rdata->got_bytes);
break;
+ case MID_RESPONSE_MALFORMED:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_malformed);
+ rdata->result = -EIO;
+ break;
default:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_unknown);
rdata->result = -EIO;
+ break;
}
if (rdata->result == -ENODATA) {
@@ -1713,10 +1724,21 @@ cifs_writev_callback(struct mid_q_entry *mid)
}
break;
case MID_REQUEST_SUBMITTED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_req_submitted);
+ __set_bit(NETFS_SREQ_NEED_RETRY, &wdata->subreq.flags);
+ result = -EAGAIN;
+ break;
case MID_RETRY_NEEDED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_retry_needed);
+ __set_bit(NETFS_SREQ_NEED_RETRY, &wdata->subreq.flags);
result = -EAGAIN;
break;
+ case MID_RESPONSE_MALFORMED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_malformed);
+ result = -EIO;
+ break;
default:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_unknown);
result = -EIO;
break;
}
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index 685c65dcb8c4..205f547ca49e 100644
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -97,7 +97,7 @@ static int reconn_set_ipaddr_from_hostname(struct TCP_Server_Info *server)
return rc;
}
-static void smb2_query_server_interfaces(struct work_struct *work)
+void smb2_query_server_interfaces(struct work_struct *work)
{
int rc;
int xid;
@@ -679,12 +679,12 @@ server_unresponsive(struct TCP_Server_Info *server)
/*
* If we're in the process of mounting a share or reconnecting a session
* and the server abruptly shut down (e.g. socket wasn't closed, packet
- * had been ACK'ed but no SMB response), don't wait longer than 20s to
- * negotiate protocol.
+ * had been ACK'ed but no SMB response), don't wait longer than 20s from
+ * when negotiate actually started.
*/
spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsInNegotiate &&
- time_after(jiffies, server->lstrp + 20 * HZ)) {
+ time_after(jiffies, server->neg_start + 20 * HZ)) {
spin_unlock(&server->srv_lock);
cifs_reconnect(server, false);
return true;
@@ -2880,20 +2880,14 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
tcon->max_cached_dirs = ctx->max_cached_dirs;
tcon->nodelete = ctx->nodelete;
tcon->local_lease = ctx->local_lease;
- INIT_LIST_HEAD(&tcon->pending_opens);
tcon->status = TID_GOOD;
- INIT_DELAYED_WORK(&tcon->query_interfaces,
- smb2_query_server_interfaces);
if (ses->server->dialect >= SMB30_PROT_ID &&
(ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
/* schedule query interfaces poll */
queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
(SMB_INTERFACE_POLL_INTERVAL * HZ));
}
-#ifdef CONFIG_CIFS_DFS_UPCALL
- INIT_DELAYED_WORK(&tcon->dfs_cache_work, dfs_cache_refresh);
-#endif
spin_lock(&cifs_tcp_ses_lock);
list_add(&tcon->tcon_list, &ses->tcon_list);
spin_unlock(&cifs_tcp_ses_lock);
@@ -4215,6 +4209,7 @@ retry:
server->lstrp = jiffies;
server->tcpStatus = CifsInNegotiate;
+ server->neg_start = jiffies;
spin_unlock(&server->srv_lock);
rc = server->ops->negotiate(xid, ses, server);
diff --git a/fs/smb/client/dir.c b/fs/smb/client/dir.c
index 1c6e5389c51f..5223edf6d11a 100644
--- a/fs/smb/client/dir.c
+++ b/fs/smb/client/dir.c
@@ -190,6 +190,7 @@ static int cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned
int disposition;
struct TCP_Server_Info *server = tcon->ses->server;
struct cifs_open_parms oparms;
+ struct cached_fid *parent_cfid = NULL;
int rdwr_for_fscache = 0;
__le32 lease_flags = 0;
@@ -313,10 +314,10 @@ static int cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned
if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
create_options |= CREATE_OPTION_READONLY;
+
retry_open:
if (tcon->cfids && direntry->d_parent && server->dialect >= SMB30_PROT_ID) {
- struct cached_fid *parent_cfid;
-
+ parent_cfid = NULL;
spin_lock(&tcon->cfids->cfid_list_lock);
list_for_each_entry(parent_cfid, &tcon->cfids->entries, entry) {
if (parent_cfid->dentry == direntry->d_parent) {
@@ -327,6 +328,7 @@ retry_open:
memcpy(fid->parent_lease_key,
parent_cfid->fid.lease_key,
SMB2_LEASE_KEY_SIZE);
+ parent_cfid->dirents.is_valid = false;
}
break;
}
diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index e9212da32f01..186e061068be 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -2999,38 +2999,38 @@ static const struct vm_operations_struct cifs_file_vm_ops = {
.page_mkwrite = cifs_page_mkwrite,
};
-int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
+int cifs_file_strict_mmap_prepare(struct vm_area_desc *desc)
{
int xid, rc = 0;
- struct inode *inode = file_inode(file);
+ struct inode *inode = file_inode(desc->file);
xid = get_xid();
if (!CIFS_CACHE_READ(CIFS_I(inode)))
rc = cifs_zap_mapping(inode);
if (!rc)
- rc = generic_file_mmap(file, vma);
+ rc = generic_file_mmap_prepare(desc);
if (!rc)
- vma->vm_ops = &cifs_file_vm_ops;
+ desc->vm_ops = &cifs_file_vm_ops;
free_xid(xid);
return rc;
}
-int cifs_file_mmap(struct file *file, struct vm_area_struct *vma)
+int cifs_file_mmap_prepare(struct vm_area_desc *desc)
{
int rc, xid;
xid = get_xid();
- rc = cifs_revalidate_file(file);
+ rc = cifs_revalidate_file(desc->file);
if (rc)
cifs_dbg(FYI, "Validation prior to mmap failed, error=%d\n",
rc);
if (!rc)
- rc = generic_file_mmap(file, vma);
+ rc = generic_file_mmap_prepare(desc);
if (!rc)
- vma->vm_ops = &cifs_file_vm_ops;
+ desc->vm_ops = &cifs_file_vm_ops;
free_xid(xid);
return rc;
@@ -3088,7 +3088,8 @@ void cifs_oplock_break(struct work_struct *work)
struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo,
oplock_break);
struct inode *inode = d_inode(cfile->dentry);
- struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct super_block *sb = inode->i_sb;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifsInodeInfo *cinode = CIFS_I(inode);
struct cifs_tcon *tcon;
struct TCP_Server_Info *server;
@@ -3098,6 +3099,12 @@ void cifs_oplock_break(struct work_struct *work)
__u64 persistent_fid, volatile_fid;
__u16 net_fid;
+ /*
+ * Hold a reference to the superblock to prevent it and its inodes from
+ * being freed while we are accessing cinode. Otherwise, _cifsFileInfo_put()
+ * may release the last reference to the sb and trigger inode eviction.
+ */
+ cifs_sb_active(sb);
wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS,
TASK_UNINTERRUPTIBLE);
@@ -3170,6 +3177,7 @@ oplock_break_ack:
cifs_put_tlink(tlink);
out:
cifs_done_oplock_break(cinode);
+ cifs_sb_deactive(sb);
}
static int cifs_swap_activate(struct swap_info_struct *sis,
diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c
index a634a34d4086..59ccc2229ab3 100644
--- a/fs/smb/client/fs_context.c
+++ b/fs/smb/client/fs_context.c
@@ -1824,10 +1824,14 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
cifs_errorf(fc, "symlinkroot mount options must be absolute path\n");
goto cifs_parse_mount_err;
}
- kfree(ctx->symlinkroot);
- ctx->symlinkroot = kstrdup(param->string, GFP_KERNEL);
- if (!ctx->symlinkroot)
+ if (strnlen(param->string, PATH_MAX) == PATH_MAX) {
+ cifs_errorf(fc, "symlinkroot path too long (max path length: %u)\n",
+ PATH_MAX - 1);
goto cifs_parse_mount_err;
+ }
+ kfree(ctx->symlinkroot);
+ ctx->symlinkroot = param->string;
+ param->string = NULL;
break;
}
/* case Opt_ignore: - is ignored as expected ... */
@@ -1837,13 +1841,6 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
goto cifs_parse_mount_err;
}
- /*
- * By default resolve all native absolute symlinks relative to "/mnt/".
- * Same default has drvfs driver running in WSL for resolving SMB shares.
- */
- if (!ctx->symlinkroot)
- ctx->symlinkroot = kstrdup("/mnt/", GFP_KERNEL);
-
return 0;
cifs_parse_mount_err:
diff --git a/fs/smb/client/misc.c b/fs/smb/client/misc.c
index e77017f47084..da23cc12a52c 100644
--- a/fs/smb/client/misc.c
+++ b/fs/smb/client/misc.c
@@ -151,6 +151,12 @@ tcon_info_alloc(bool dir_leases_enabled, enum smb3_tcon_ref_trace trace)
#ifdef CONFIG_CIFS_DFS_UPCALL
INIT_LIST_HEAD(&ret_buf->dfs_ses_list);
#endif
+ INIT_LIST_HEAD(&ret_buf->pending_opens);
+ INIT_DELAYED_WORK(&ret_buf->query_interfaces,
+ smb2_query_server_interfaces);
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ INIT_DELAYED_WORK(&ret_buf->dfs_cache_work, dfs_cache_refresh);
+#endif
return ret_buf;
}
diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c
index ba0193cf9033..4e5460206397 100644
--- a/fs/smb/client/readdir.c
+++ b/fs/smb/client/readdir.c
@@ -264,7 +264,7 @@ cifs_posix_to_fattr(struct cifs_fattr *fattr, struct smb2_posix_info *info,
/* The Mode field in the response can now include the file type as well */
fattr->cf_mode = wire_mode_to_posix(le32_to_cpu(info->Mode),
fattr->cf_cifsattrs & ATTR_DIRECTORY);
- fattr->cf_dtype = S_DT(le32_to_cpu(info->Mode));
+ fattr->cf_dtype = S_DT(fattr->cf_mode);
switch (fattr->cf_mode & S_IFMT) {
case S_IFLNK:
diff --git a/fs/smb/client/reparse.c b/fs/smb/client/reparse.c
index 1c40e42e4d89..5fa29a97ac15 100644
--- a/fs/smb/client/reparse.c
+++ b/fs/smb/client/reparse.c
@@ -57,6 +57,7 @@ static int create_native_symlink(const unsigned int xid, struct inode *inode,
struct reparse_symlink_data_buffer *buf = NULL;
struct cifs_open_info_data data = {};
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ const char *symroot = cifs_sb->ctx->symlinkroot;
struct inode *new;
struct kvec iov;
__le16 *path = NULL;
@@ -82,7 +83,8 @@ static int create_native_symlink(const unsigned int xid, struct inode *inode,
.symlink_target = symlink_target,
};
- if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && symname[0] == '/') {
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) &&
+ symroot && symname[0] == '/') {
/*
* This is a request to create an absolute symlink on the server
* which does not support POSIX paths, and expects symlink in
@@ -92,7 +94,7 @@ static int create_native_symlink(const unsigned int xid, struct inode *inode,
* ensure compatibility of this symlink stored in absolute form
* on the SMB server.
*/
- if (!strstarts(symname, cifs_sb->ctx->symlinkroot)) {
+ if (!strstarts(symname, symroot)) {
/*
* If the absolute Linux symlink target path is not
* inside "symlinkroot" location then there is no way
@@ -101,12 +103,12 @@ static int create_native_symlink(const unsigned int xid, struct inode *inode,
cifs_dbg(VFS,
"absolute symlink '%s' cannot be converted to NT format "
"because it is outside of symlinkroot='%s'\n",
- symname, cifs_sb->ctx->symlinkroot);
+ symname, symroot);
rc = -EINVAL;
goto out;
}
- len = strlen(cifs_sb->ctx->symlinkroot);
- if (cifs_sb->ctx->symlinkroot[len-1] != '/')
+ len = strlen(symroot);
+ if (symroot[len - 1] != '/')
len++;
if (symname[len] >= 'a' && symname[len] <= 'z' &&
(symname[len+1] == '/' || symname[len+1] == '\0')) {
@@ -782,6 +784,7 @@ int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
const char *full_path,
struct cifs_sb_info *cifs_sb)
{
+ const char *symroot = cifs_sb->ctx->symlinkroot;
char sep = CIFS_DIR_SEP(cifs_sb);
char *linux_target = NULL;
char *smb_target = NULL;
@@ -815,7 +818,8 @@ int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
goto out;
}
- if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && !relative) {
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) &&
+ symroot && !relative) {
/*
* This is an absolute symlink from the server which does not
* support POSIX paths, so the symlink is in NT-style path.
@@ -907,15 +911,15 @@ globalroot:
}
abs_path_len = strlen(abs_path)+1;
- symlinkroot_len = strlen(cifs_sb->ctx->symlinkroot);
- if (cifs_sb->ctx->symlinkroot[symlinkroot_len-1] == '/')
+ symlinkroot_len = strlen(symroot);
+ if (symroot[symlinkroot_len - 1] == '/')
symlinkroot_len--;
linux_target = kmalloc(symlinkroot_len + 1 + abs_path_len, GFP_KERNEL);
if (!linux_target) {
rc = -ENOMEM;
goto out;
}
- memcpy(linux_target, cifs_sb->ctx->symlinkroot, symlinkroot_len);
+ memcpy(linux_target, symroot, symlinkroot_len);
linux_target[symlinkroot_len] = '/';
memcpy(linux_target + symlinkroot_len + 1, abs_path, abs_path_len);
} else if (smb_target[0] == sep && relative) {
diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c
index 2a3e46b8e15a..a11a2a693c51 100644
--- a/fs/smb/client/smb2inode.c
+++ b/fs/smb/client/smb2inode.c
@@ -1346,7 +1346,8 @@ struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
* empty object on the server.
*/
if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS))
- return ERR_PTR(-EOPNOTSUPP);
+ if (!tcon->posix_extensions)
+ return ERR_PTR(-EOPNOTSUPP);
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
SYNCHRONIZE | DELETE |
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 1468c16ea9b8..938a8a7c5d21 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -4316,6 +4316,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
u8 key[SMB3_ENC_DEC_KEY_SIZE];
struct aead_request *req;
u8 *iv;
+ DECLARE_CRYPTO_WAIT(wait);
unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
void *creq;
size_t sensitive_size;
@@ -4366,7 +4367,11 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
aead_request_set_crypt(req, sg, sg, crypt_len, iv);
aead_request_set_ad(req, assoc_data_len);
- rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
+ aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+ crypto_req_done, &wait);
+
+ rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
+ : crypto_aead_decrypt(req), &wait);
if (!rc && enc)
memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
@@ -5255,7 +5260,8 @@ static int smb2_make_node(unsigned int xid, struct inode *inode,
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
full_path, mode, dev);
- } else if (le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS) {
+ } else if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS)
+ || (tcon->posix_extensions)) {
rc = smb2_mknod_reparse(xid, inode, dentry, tcon,
full_path, mode, dev);
}
diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index a717be1626a3..2df93a75e3b8 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -424,9 +424,9 @@ skip_sess_setup:
free_xid(xid);
ses->flags &= ~CIFS_SES_FLAGS_PENDING_QUERY_INTERFACES;
- /* regardless of rc value, setup polling */
- queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
- (SMB_INTERFACE_POLL_INTERVAL * HZ));
+ if (!tcon->ipc && !tcon->dummy)
+ queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
+ (SMB_INTERFACE_POLL_INTERVAL * HZ));
mutex_unlock(&ses->session_mutex);
@@ -4229,10 +4229,8 @@ void smb2_reconnect_server(struct work_struct *work)
}
goto done;
}
-
tcon->status = TID_GOOD;
- tcon->retry = false;
- tcon->need_reconnect = false;
+ tcon->dummy = true;
/* now reconnect sessions for necessary channels */
list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
@@ -4567,7 +4565,11 @@ smb2_readv_callback(struct mid_q_entry *mid)
cifs_stats_bytes_read(tcon, rdata->got_bytes);
break;
case MID_REQUEST_SUBMITTED:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_req_submitted);
+ goto do_retry;
case MID_RETRY_NEEDED:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_retry_needed);
+do_retry:
__set_bit(NETFS_SREQ_NEED_RETRY, &rdata->subreq.flags);
rdata->result = -EAGAIN;
if (server->sign && rdata->got_bytes)
@@ -4578,11 +4580,15 @@ smb2_readv_callback(struct mid_q_entry *mid)
cifs_stats_bytes_read(tcon, rdata->got_bytes);
break;
case MID_RESPONSE_MALFORMED:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_malformed);
credits.value = le16_to_cpu(shdr->CreditRequest);
credits.instance = server->reconnect_instance;
- fallthrough;
+ rdata->result = -EIO;
+ break;
default:
+ trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_unknown);
rdata->result = -EIO;
+ break;
}
#ifdef CONFIG_CIFS_SMB_DIRECT
/*
@@ -4835,11 +4841,14 @@ smb2_writev_callback(struct mid_q_entry *mid)
switch (mid->mid_state) {
case MID_RESPONSE_RECEIVED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_progress);
credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
credits.instance = server->reconnect_instance;
result = smb2_check_receive(mid, server, 0);
- if (result != 0)
+ if (result != 0) {
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_bad);
break;
+ }
written = le32_to_cpu(rsp->DataLength);
/*
@@ -4861,14 +4870,23 @@ smb2_writev_callback(struct mid_q_entry *mid)
}
break;
case MID_REQUEST_SUBMITTED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_req_submitted);
+ __set_bit(NETFS_SREQ_NEED_RETRY, &wdata->subreq.flags);
+ result = -EAGAIN;
+ break;
case MID_RETRY_NEEDED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_retry_needed);
+ __set_bit(NETFS_SREQ_NEED_RETRY, &wdata->subreq.flags);
result = -EAGAIN;
break;
case MID_RESPONSE_MALFORMED:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_malformed);
credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
credits.instance = server->reconnect_instance;
- fallthrough;
+ result = -EIO;
+ break;
default:
+ trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_unknown);
result = -EIO;
break;
}
@@ -4908,7 +4926,6 @@ smb2_writev_callback(struct mid_q_entry *mid)
server->credits, server->in_flight,
0, cifs_trace_rw_credits_write_response_clear);
wdata->credits.value = 0;
- trace_netfs_sreq(&wdata->subreq, netfs_sreq_trace_io_progress);
cifs_write_subrequest_terminated(wdata, result ?: written);
release_mid(mid);
trace_smb3_rw_credits(rreq_debug_id, subreq_debug_index, 0,
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index fafa86273f12..6fc6ad63d004 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -1594,7 +1594,7 @@ static int krb5_authenticate(struct ksmbd_work *work,
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
char *in_blob, *out_blob;
- struct channel *chann = NULL;
+ struct channel *chann = NULL, *old;
u64 prev_sess_id;
int in_len, out_len;
int retval;
@@ -1621,11 +1621,24 @@ static int krb5_authenticate(struct ksmbd_work *work,
rsp->SecurityBufferLength = cpu_to_le16(out_len);
- if ((conn->sign || server_conf.enforced_signing) ||
+ /*
+ * If session state is SMB2_SESSION_VALID, We can assume
+ * that it is reauthentication. And the user/password
+ * has been verified, so return it here.
+ */
+ if (sess->state == SMB2_SESSION_VALID) {
+ if (conn->binding)
+ goto binding_session;
+ return 0;
+ }
+
+ if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
+ (conn->sign || server_conf.enforced_signing)) ||
(req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
sess->sign = true;
- if (smb3_encryption_negotiated(conn)) {
+ if (smb3_encryption_negotiated(conn) &&
+ !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
retval = conn->ops->generate_encryptionkey(conn, sess);
if (retval) {
ksmbd_debug(SMB,
@@ -1638,6 +1651,7 @@ static int krb5_authenticate(struct ksmbd_work *work,
sess->sign = false;
}
+binding_session:
if (conn->dialect >= SMB30_PROT_ID) {
chann = lookup_chann_list(sess, conn);
if (!chann) {
@@ -1646,7 +1660,12 @@ static int krb5_authenticate(struct ksmbd_work *work,
return -ENOMEM;
chann->conn = conn;
- xa_store(&sess->ksmbd_chann_list, (long)conn, chann, KSMBD_DEFAULT_GFP);
+ old = xa_store(&sess->ksmbd_chann_list, (long)conn,
+ chann, KSMBD_DEFAULT_GFP);
+ if (xa_is_err(old)) {
+ kfree(chann);
+ return xa_err(old);
+ }
}
}
@@ -1833,8 +1852,6 @@ int smb2_sess_setup(struct ksmbd_work *work)
ksmbd_conn_set_good(conn);
sess->state = SMB2_SESSION_VALID;
}
- kfree(sess->Preauth_HashValue);
- sess->Preauth_HashValue = NULL;
} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
if (negblob->MessageType == NtLmNegotiate) {
rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
@@ -1861,8 +1878,6 @@ int smb2_sess_setup(struct ksmbd_work *work)
kfree(preauth_sess);
}
}
- kfree(sess->Preauth_HashValue);
- sess->Preauth_HashValue = NULL;
} else {
pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
le32_to_cpu(negblob->MessageType));
@@ -2581,7 +2596,7 @@ static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
}
}
-static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
+static int smb2_creat(struct ksmbd_work *work,
struct path *path, char *name, int open_flags,
umode_t posix_mode, bool is_dir)
{
@@ -2610,7 +2625,7 @@ static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
return rc;
}
- rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, 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);
@@ -2860,7 +2875,7 @@ int smb2_open(struct ksmbd_work *work)
struct ksmbd_tree_connect *tcon = work->tcon;
struct smb2_create_req *req;
struct smb2_create_rsp *rsp;
- struct path path, parent_path;
+ struct path path;
struct ksmbd_share_config *share = tcon->share_conf;
struct ksmbd_file *fp = NULL;
struct file *filp = NULL;
@@ -3116,8 +3131,8 @@ int smb2_open(struct ksmbd_work *work)
goto err_out2;
}
- rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
- &parent_path, &path, 1);
+ rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS,
+ &path, 1);
if (!rc) {
file_present = true;
@@ -3238,7 +3253,7 @@ int smb2_open(struct ksmbd_work *work)
/*create file if not present */
if (!file_present) {
- rc = smb2_creat(work, &parent_path, &path, name, open_flags,
+ rc = smb2_creat(work, &path, name, open_flags,
posix_mode,
req->CreateOptions & FILE_DIRECTORY_FILE_LE);
if (rc) {
@@ -3443,7 +3458,7 @@ int smb2_open(struct ksmbd_work *work)
}
if (file_present || created)
- ksmbd_vfs_kern_path_unlock(&parent_path, &path);
+ path_put(&path);
if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
!fp->attrib_only && !stream_name) {
@@ -3724,7 +3739,7 @@ reconnected_fp:
err_out:
if (rc && (file_present || created))
- ksmbd_vfs_kern_path_unlock(&parent_path, &path);
+ path_put(&path);
err_out1:
ksmbd_revert_fsids(work);
@@ -4108,20 +4123,6 @@ struct smb2_query_dir_private {
int info_level;
};
-static void lock_dir(struct ksmbd_file *dir_fp)
-{
- struct dentry *dir = dir_fp->filp->f_path.dentry;
-
- inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
-}
-
-static void unlock_dir(struct ksmbd_file *dir_fp)
-{
- struct dentry *dir = dir_fp->filp->f_path.dentry;
-
- inode_unlock(d_inode(dir));
-}
-
static int process_query_dir_entries(struct smb2_query_dir_private *priv)
{
struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
@@ -4136,12 +4137,10 @@ static int process_query_dir_entries(struct smb2_query_dir_private *priv)
if (dentry_name(priv->d_info, priv->info_level))
return -EINVAL;
- lock_dir(priv->dir_fp);
- dent = lookup_one(idmap,
- &QSTR_LEN(priv->d_info->name,
- priv->d_info->name_len),
- priv->dir_fp->filp->f_path.dentry);
- unlock_dir(priv->dir_fp);
+ dent = lookup_one_unlocked(idmap,
+ &QSTR_LEN(priv->d_info->name,
+ priv->d_info->name_len),
+ priv->dir_fp->filp->f_path.dentry);
if (IS_ERR(dent)) {
ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
@@ -6052,8 +6051,7 @@ static int smb2_create_link(struct ksmbd_work *work,
struct nls_table *local_nls)
{
char *link_name = NULL, *target_name = NULL, *pathname = NULL;
- struct path path, parent_path;
- bool file_present = false;
+ struct path path;
int rc;
if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
@@ -6082,15 +6080,12 @@ static int smb2_create_link(struct ksmbd_work *work,
ksmbd_debug(SMB, "target name is %s\n", target_name);
rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
- &parent_path, &path, 0);
+ &path, 0);
if (rc) {
if (rc != -ENOENT)
goto out;
- } else
- file_present = true;
-
- if (file_info->ReplaceIfExists) {
- if (file_present) {
+ } else {
+ if (file_info->ReplaceIfExists) {
rc = ksmbd_vfs_remove_file(work, &path);
if (rc) {
rc = -EINVAL;
@@ -6098,21 +6093,17 @@ static int smb2_create_link(struct ksmbd_work *work,
link_name);
goto out;
}
- }
- } else {
- if (file_present) {
+ } else {
rc = -EEXIST;
ksmbd_debug(SMB, "link already exists\n");
goto out;
}
+ ksmbd_vfs_kern_path_unlock(&path);
}
-
rc = ksmbd_vfs_link(work, target_name, link_name);
if (rc)
rc = -EINVAL;
out:
- if (file_present)
- ksmbd_vfs_kern_path_unlock(&parent_path, &path);
if (!IS_ERR(link_name))
kfree(link_name);
@@ -8573,11 +8564,6 @@ static void smb20_oplock_break_ack(struct ksmbd_work *work)
goto err_out;
}
- opinfo->op_state = OPLOCK_STATE_NONE;
- wake_up_interruptible_all(&opinfo->oplock_q);
- opinfo_put(opinfo);
- ksmbd_fd_put(work, fp);
-
rsp->StructureSize = cpu_to_le16(24);
rsp->OplockLevel = rsp_oplevel;
rsp->Reserved = 0;
@@ -8585,16 +8571,15 @@ static void smb20_oplock_break_ack(struct ksmbd_work *work)
rsp->VolatileFid = volatile_id;
rsp->PersistentFid = persistent_id;
ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
- if (!ret)
- return;
-
+ if (ret) {
err_out:
+ smb2_set_err_rsp(work);
+ }
+
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
-
opinfo_put(opinfo);
ksmbd_fd_put(work, fp);
- smb2_set_err_rsp(work);
}
static int check_lease_state(struct lease *lease, __le32 req_state)
@@ -8724,11 +8709,6 @@ static void smb21_lease_break_ack(struct ksmbd_work *work)
}
lease_state = lease->state;
- opinfo->op_state = OPLOCK_STATE_NONE;
- wake_up_interruptible_all(&opinfo->oplock_q);
- atomic_dec(&opinfo->breaking_cnt);
- wake_up_interruptible_all(&opinfo->oplock_brk);
- opinfo_put(opinfo);
rsp->StructureSize = cpu_to_le16(36);
rsp->Reserved = 0;
@@ -8737,16 +8717,16 @@ static void smb21_lease_break_ack(struct ksmbd_work *work)
rsp->LeaseState = lease_state;
rsp->LeaseDuration = 0;
ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
- if (!ret)
- return;
-
+ if (ret) {
err_out:
+ smb2_set_err_rsp(work);
+ }
+
+ opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
atomic_dec(&opinfo->breaking_cnt);
wake_up_interruptible_all(&opinfo->oplock_brk);
-
opinfo_put(opinfo);
- smb2_set_err_rsp(work);
}
/**
diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c
index 64a428a06ace..c6cbe0d56e32 100644
--- a/fs/smb/server/transport_rdma.c
+++ b/fs/smb/server/transport_rdma.c
@@ -433,7 +433,8 @@ static void free_transport(struct smb_direct_transport *t)
if (t->qp) {
ib_drain_qp(t->qp);
ib_mr_pool_destroy(t->qp, &t->qp->rdma_mrs);
- ib_destroy_qp(t->qp);
+ t->qp = NULL;
+ rdma_destroy_qp(t->cm_id);
}
ksmbd_debug(RDMA, "drain the reassembly queue\n");
@@ -1940,8 +1941,8 @@ static int smb_direct_create_qpair(struct smb_direct_transport *t,
return 0;
err:
if (t->qp) {
- ib_destroy_qp(t->qp);
t->qp = NULL;
+ rdma_destroy_qp(t->cm_id);
}
if (t->recv_cq) {
ib_destroy_cq(t->recv_cq);
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index 0f3aad12e495..04539037108c 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -66,13 +66,12 @@ int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child)
return 0;
}
-static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf,
- char *pathname, unsigned int flags,
- struct path *parent_path,
- struct path *path)
+static int ksmbd_vfs_path_lookup(struct ksmbd_share_config *share_conf,
+ char *pathname, unsigned int flags,
+ struct path *path, bool do_lock)
{
struct qstr last;
- struct filename *filename;
+ struct filename *filename __free(putname) = NULL;
struct path *root_share_path = &share_conf->vfs_path;
int err, type;
struct dentry *d;
@@ -89,51 +88,57 @@ static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf,
return PTR_ERR(filename);
err = vfs_path_parent_lookup(filename, flags,
- parent_path, &last, &type,
+ path, &last, &type,
root_share_path);
- if (err) {
- putname(filename);
+ if (err)
return err;
- }
if (unlikely(type != LAST_NORM)) {
- path_put(parent_path);
- putname(filename);
+ path_put(path);
return -ENOENT;
}
- err = mnt_want_write(parent_path->mnt);
- if (err) {
- path_put(parent_path);
- putname(filename);
+ if (do_lock) {
+ err = mnt_want_write(path->mnt);
+ if (err) {
+ path_put(path);
+ return -ENOENT;
+ }
+
+ inode_lock_nested(path->dentry->d_inode, I_MUTEX_PARENT);
+ d = lookup_one_qstr_excl(&last, path->dentry, 0);
+
+ if (!IS_ERR(d)) {
+ dput(path->dentry);
+ path->dentry = d;
+ return 0;
+ }
+ inode_unlock(path->dentry->d_inode);
+ mnt_drop_write(path->mnt);
+ path_put(path);
return -ENOENT;
}
- inode_lock_nested(parent_path->dentry->d_inode, I_MUTEX_PARENT);
- d = lookup_one_qstr_excl(&last, parent_path->dentry, 0);
- if (IS_ERR(d))
- goto err_out;
-
+ d = lookup_noperm_unlocked(&last, path->dentry);
+ if (!IS_ERR(d) && d_is_negative(d)) {
+ dput(d);
+ d = ERR_PTR(-ENOENT);
+ }
+ if (IS_ERR(d)) {
+ path_put(path);
+ return -ENOENT;
+ }
+ dput(path->dentry);
path->dentry = d;
- path->mnt = mntget(parent_path->mnt);
if (test_share_config_flag(share_conf, KSMBD_SHARE_FLAG_CROSSMNT)) {
err = follow_down(path, 0);
if (err < 0) {
path_put(path);
- goto err_out;
+ return -ENOENT;
}
}
-
- putname(filename);
return 0;
-
-err_out:
- inode_unlock(d_inode(parent_path->dentry));
- mnt_drop_write(parent_path->mnt);
- path_put(parent_path);
- putname(filename);
- return -ENOENT;
}
void ksmbd_vfs_query_maximal_access(struct mnt_idmap *idmap,
@@ -548,7 +553,8 @@ 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;
@@ -765,10 +771,10 @@ retry:
}
rd.old_mnt_idmap = mnt_idmap(old_path->mnt),
- rd.old_dir = d_inode(old_parent),
+ rd.old_parent = old_parent,
rd.old_dentry = old_child,
rd.new_mnt_idmap = mnt_idmap(new_path.mnt),
- rd.new_dir = new_path.dentry->d_inode,
+ rd.new_parent = new_path.dentry,
rd.new_dentry = new_dentry,
rd.flags = flags,
rd.delegated_inode = NULL,
@@ -1198,103 +1204,114 @@ static int ksmbd_vfs_lookup_in_dir(const struct path *dir, char *name,
return ret;
}
-/**
- * ksmbd_vfs_kern_path_locked() - lookup a file and get path info
- * @work: work
- * @name: file path that is relative to share
- * @flags: lookup flags
- * @parent_path: if lookup succeed, return parent_path info
- * @path: if lookup succeed, return path info
- * @caseless: caseless filename lookup
- *
- * Return: 0 on success, otherwise error
- */
-int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
- unsigned int flags, struct path *parent_path,
- struct path *path, bool caseless)
+static
+int __ksmbd_vfs_kern_path(struct ksmbd_work *work, char *filepath,
+ unsigned int flags,
+ struct path *path, bool caseless, bool do_lock)
{
struct ksmbd_share_config *share_conf = work->tcon->share_conf;
+ struct path parent_path;
+ size_t path_len, remain_len;
int err;
- err = ksmbd_vfs_path_lookup_locked(share_conf, name, flags, parent_path,
- path);
- if (!err)
- return 0;
-
- if (caseless) {
- char *filepath;
- size_t path_len, remain_len;
-
- filepath = name;
- path_len = strlen(filepath);
- remain_len = path_len;
-
- *parent_path = share_conf->vfs_path;
- path_get(parent_path);
+retry:
+ err = ksmbd_vfs_path_lookup(share_conf, filepath, flags, path, do_lock);
+ if (!err || !caseless)
+ return err;
- while (d_can_lookup(parent_path->dentry)) {
- char *filename = filepath + path_len - remain_len;
- char *next = strchrnul(filename, '/');
- size_t filename_len = next - filename;
- bool is_last = !next[0];
+ path_len = strlen(filepath);
+ remain_len = path_len;
- if (filename_len == 0)
- break;
+ parent_path = share_conf->vfs_path;
+ path_get(&parent_path);
- err = ksmbd_vfs_lookup_in_dir(parent_path, filename,
- filename_len,
- work->conn->um);
- if (err)
- goto out2;
+ while (d_can_lookup(parent_path.dentry)) {
+ char *filename = filepath + path_len - remain_len;
+ char *next = strchrnul(filename, '/');
+ size_t filename_len = next - filename;
+ bool is_last = !next[0];
- next[0] = '\0';
-
- err = vfs_path_lookup(share_conf->vfs_path.dentry,
- share_conf->vfs_path.mnt,
- filepath,
- flags,
- path);
- if (!is_last)
- next[0] = '/';
- if (err)
- goto out2;
- else if (is_last)
- goto out1;
- path_put(parent_path);
- *parent_path = *path;
+ if (filename_len == 0)
+ break;
- remain_len -= filename_len + 1;
+ err = ksmbd_vfs_lookup_in_dir(&parent_path, filename,
+ filename_len,
+ work->conn->um);
+ path_put(&parent_path);
+ if (err)
+ goto out;
+ if (is_last) {
+ caseless = false;
+ goto retry;
}
+ next[0] = '\0';
+
+ err = vfs_path_lookup(share_conf->vfs_path.dentry,
+ share_conf->vfs_path.mnt,
+ filepath,
+ flags,
+ &parent_path);
+ next[0] = '/';
+ if (err)
+ goto out;
- err = -EINVAL;
-out2:
- path_put(parent_path);
+ remain_len -= filename_len + 1;
}
-out1:
- if (!err) {
- err = mnt_want_write(parent_path->mnt);
- if (err) {
- path_put(path);
- path_put(parent_path);
- return err;
- }
-
- err = ksmbd_vfs_lock_parent(parent_path->dentry, path->dentry);
- if (err) {
- path_put(path);
- path_put(parent_path);
- }
- }
+ err = -EINVAL;
+ path_put(&parent_path);
+out:
return err;
}
-void ksmbd_vfs_kern_path_unlock(struct path *parent_path, struct path *path)
+/**
+ * ksmbd_vfs_kern_path() - lookup a file and get path info
+ * @work: work
+ * @filepath: file path that is relative to share
+ * @flags: lookup flags
+ * @path: if lookup succeed, return path info
+ * @caseless: caseless filename lookup
+ *
+ * Perform the lookup, possibly crossing over any mount point.
+ * On return no locks will be held and write-access to filesystem
+ * won't have been checked.
+ * Return: 0 if file was found, otherwise error
+ */
+int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *filepath,
+ unsigned int flags,
+ struct path *path, bool caseless)
+{
+ return __ksmbd_vfs_kern_path(work, filepath, flags, path,
+ caseless, false);
+}
+
+/**
+ * ksmbd_vfs_kern_path_locked() - lookup a file and get path info
+ * @work: work
+ * @filepath: file path that is relative to share
+ * @flags: lookup flags
+ * @path: if lookup succeed, return path info
+ * @caseless: caseless filename lookup
+ *
+ * Perform the lookup, but don't cross over any mount point.
+ * On return the parent of path->dentry will be locked and write-access to
+ * filesystem will have been gained.
+ * Return: 0 on if file was found, otherwise error
+ */
+int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *filepath,
+ unsigned int flags,
+ struct path *path, bool caseless)
{
- inode_unlock(d_inode(parent_path->dentry));
- mnt_drop_write(parent_path->mnt);
+ return __ksmbd_vfs_kern_path(work, filepath, flags, path,
+ caseless, true);
+}
+
+void ksmbd_vfs_kern_path_unlock(struct path *path)
+{
+ /* While lock is still held, ->d_parent is safe */
+ inode_unlock(d_inode(path->dentry->d_parent));
+ mnt_drop_write(path->mnt);
path_put(path);
- path_put(parent_path);
}
struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
diff --git a/fs/smb/server/vfs.h b/fs/smb/server/vfs.h
index 2893f59803a6..d47472f3e30b 100644
--- a/fs/smb/server/vfs.h
+++ b/fs/smb/server/vfs.h
@@ -117,10 +117,13 @@ int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
int ksmbd_vfs_remove_xattr(struct mnt_idmap *idmap,
const struct path *path, char *attr_name,
bool get_write);
+int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name,
+ unsigned int flags,
+ struct path *path, bool caseless);
int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
- unsigned int flags, struct path *parent_path,
+ unsigned int flags,
struct path *path, bool caseless);
-void ksmbd_vfs_kern_path_unlock(struct path *parent_path, struct path *path);
+void ksmbd_vfs_kern_path_unlock(struct path *path);
struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
const char *name,
unsigned int flags,
generated by cgit (git 2.34.1) at 2025-07-29 06:32:35 +0000