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https://github.com/torvalds/linux
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smb: client: move most of reparse point handling code to common file
In preparation to add support for creating special files also via WSL reparse points in next commits. Signed-off-by: Paulo Alcantara <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara
Steve French
parent
eb90e8ecb2
commit
c520ba7573
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@ -12,7 +12,7 @@ cifs-y := trace.o cifsfs.o cifs_debug.o connect.o dir.o file.o \
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smb2ops.o smb2maperror.o smb2transport.o \
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smb2misc.o smb2pdu.o smb2inode.o smb2file.o cifsacl.o fs_context.o \
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dns_resolve.o cifs_spnego_negtokeninit.asn1.o asn1.o \
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namespace.o
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namespace.o reparse.o
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$(obj)/asn1.o: $(obj)/cifs_spnego_negtokeninit.asn1.h
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@ -223,19 +223,6 @@ struct cifs_open_info_data {
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};
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};
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static inline bool cifs_open_data_reparse(struct cifs_open_info_data *data)
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{
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struct smb2_file_all_info *fi = &data->fi;
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u32 attrs = le32_to_cpu(fi->Attributes);
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bool ret;
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ret = data->reparse_point || (attrs & ATTR_REPARSE);
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if (ret)
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attrs |= ATTR_REPARSE;
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fi->Attributes = cpu_to_le32(attrs);
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return ret;
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}
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/*
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*****************************************************************
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* Except the CIFS PDUs themselves all the
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@ -210,10 +210,6 @@ extern struct inode *cifs_iget(struct super_block *sb,
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int cifs_get_inode_info(struct inode **inode, const char *full_path,
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struct cifs_open_info_data *data, struct super_block *sb, int xid,
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const struct cifs_fid *fid);
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bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
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struct cifs_fattr *fattr,
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struct cifs_open_info_data *data);
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extern int smb311_posix_get_inode_info(struct inode **inode,
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const char *full_path,
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struct cifs_open_info_data *data,
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@ -26,6 +26,7 @@
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#include "fs_context.h"
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#include "cifs_ioctl.h"
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#include "cached_dir.h"
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#include "reparse.h"
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static void cifs_set_ops(struct inode *inode)
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{
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@ -728,84 +729,6 @@ static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr,
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fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
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}
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static inline dev_t nfs_mkdev(struct reparse_posix_data *buf)
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{
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u64 v = le64_to_cpu(*(__le64 *)buf->DataBuffer);
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return MKDEV(v >> 32, v & 0xffffffff);
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}
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bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
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struct cifs_fattr *fattr,
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struct cifs_open_info_data *data)
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{
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struct reparse_posix_data *buf = data->reparse.posix;
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u32 tag = data->reparse.tag;
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if (tag == IO_REPARSE_TAG_NFS && buf) {
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switch (le64_to_cpu(buf->InodeType)) {
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case NFS_SPECFILE_CHR:
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fattr->cf_mode |= S_IFCHR;
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fattr->cf_dtype = DT_CHR;
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fattr->cf_rdev = nfs_mkdev(buf);
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break;
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case NFS_SPECFILE_BLK:
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fattr->cf_mode |= S_IFBLK;
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fattr->cf_dtype = DT_BLK;
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fattr->cf_rdev = nfs_mkdev(buf);
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break;
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case NFS_SPECFILE_FIFO:
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fattr->cf_mode |= S_IFIFO;
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fattr->cf_dtype = DT_FIFO;
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break;
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case NFS_SPECFILE_SOCK:
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fattr->cf_mode |= S_IFSOCK;
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fattr->cf_dtype = DT_SOCK;
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break;
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case NFS_SPECFILE_LNK:
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fattr->cf_mode |= S_IFLNK;
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fattr->cf_dtype = DT_LNK;
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break;
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default:
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WARN_ON_ONCE(1);
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return false;
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}
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return true;
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}
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switch (tag) {
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case IO_REPARSE_TAG_LX_SYMLINK:
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fattr->cf_mode |= S_IFLNK;
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fattr->cf_dtype = DT_LNK;
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break;
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case IO_REPARSE_TAG_LX_FIFO:
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fattr->cf_mode |= S_IFIFO;
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fattr->cf_dtype = DT_FIFO;
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break;
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case IO_REPARSE_TAG_AF_UNIX:
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fattr->cf_mode |= S_IFSOCK;
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fattr->cf_dtype = DT_SOCK;
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break;
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case IO_REPARSE_TAG_LX_CHR:
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fattr->cf_mode |= S_IFCHR;
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fattr->cf_dtype = DT_CHR;
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break;
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case IO_REPARSE_TAG_LX_BLK:
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fattr->cf_mode |= S_IFBLK;
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fattr->cf_dtype = DT_BLK;
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break;
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case 0: /* SMB1 symlink */
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case IO_REPARSE_TAG_SYMLINK:
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case IO_REPARSE_TAG_NFS:
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fattr->cf_mode |= S_IFLNK;
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fattr->cf_dtype = DT_LNK;
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break;
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default:
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return false;
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}
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return true;
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}
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static void cifs_open_info_to_fattr(struct cifs_fattr *fattr,
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struct cifs_open_info_data *data,
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struct super_block *sb)
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@ -22,6 +22,7 @@
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#include "smb2proto.h"
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#include "fs_context.h"
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#include "cached_dir.h"
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#include "reparse.h"
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/*
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* To be safe - for UCS to UTF-8 with strings loaded with the rare long
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@ -55,23 +56,6 @@ static inline void dump_cifs_file_struct(struct file *file, char *label)
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}
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#endif /* DEBUG2 */
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/*
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* Match a reparse point inode if reparse tag and ctime haven't changed.
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*
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* Windows Server updates ctime of reparse points when their data have changed.
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* The server doesn't allow changing reparse tags from existing reparse points,
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* though it's worth checking.
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*/
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static inline bool reparse_inode_match(struct inode *inode,
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struct cifs_fattr *fattr)
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{
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struct timespec64 ctime = inode_get_ctime(inode);
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return (CIFS_I(inode)->cifsAttrs & ATTR_REPARSE) &&
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CIFS_I(inode)->reparse_tag == fattr->cf_cifstag &&
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timespec64_equal(&ctime, &fattr->cf_ctime);
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}
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/*
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* Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
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*
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320
fs/smb/client/reparse.c
Normal file
320
fs/smb/client/reparse.c
Normal file
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@ -0,0 +1,320 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2024 Paulo Alcantara <pc@manguebit.com>
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*/
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/slab.h>
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#include "cifsglob.h"
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#include "smb2proto.h"
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#include "cifsproto.h"
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#include "cifs_unicode.h"
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#include "cifs_debug.h"
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#include "reparse.h"
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int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
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struct dentry *dentry, struct cifs_tcon *tcon,
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const char *full_path, const char *symname)
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{
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struct reparse_symlink_data_buffer *buf = NULL;
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struct cifs_open_info_data data;
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
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struct inode *new;
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struct kvec iov;
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__le16 *path;
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char *sym, sep = CIFS_DIR_SEP(cifs_sb);
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u16 len, plen;
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int rc = 0;
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sym = kstrdup(symname, GFP_KERNEL);
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if (!sym)
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return -ENOMEM;
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data = (struct cifs_open_info_data) {
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.reparse_point = true,
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.reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
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.symlink_target = sym,
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};
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convert_delimiter(sym, sep);
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path = cifs_convert_path_to_utf16(sym, cifs_sb);
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if (!path) {
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rc = -ENOMEM;
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goto out;
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}
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plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX);
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len = sizeof(*buf) + plen * 2;
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buf = kzalloc(len, GFP_KERNEL);
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if (!buf) {
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rc = -ENOMEM;
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goto out;
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}
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buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
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buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
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buf->SubstituteNameOffset = cpu_to_le16(plen);
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buf->SubstituteNameLength = cpu_to_le16(plen);
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memcpy(&buf->PathBuffer[plen], path, plen);
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buf->PrintNameOffset = 0;
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buf->PrintNameLength = cpu_to_le16(plen);
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memcpy(buf->PathBuffer, path, plen);
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buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
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if (*sym != sep)
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buf->Flags = cpu_to_le32(SYMLINK_FLAG_RELATIVE);
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convert_delimiter(sym, '/');
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iov.iov_base = buf;
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iov.iov_len = len;
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new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
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tcon, full_path, &iov);
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if (!IS_ERR(new))
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d_instantiate(dentry, new);
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else
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rc = PTR_ERR(new);
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out:
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kfree(path);
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cifs_free_open_info(&data);
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kfree(buf);
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return rc;
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}
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static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
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mode_t mode, dev_t dev,
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struct kvec *iov)
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{
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u64 type;
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u16 len, dlen;
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len = sizeof(*buf);
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switch ((type = reparse_mode_nfs_type(mode))) {
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case NFS_SPECFILE_BLK:
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case NFS_SPECFILE_CHR:
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dlen = sizeof(__le64);
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break;
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case NFS_SPECFILE_FIFO:
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case NFS_SPECFILE_SOCK:
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dlen = 0;
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break;
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default:
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return -EOPNOTSUPP;
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}
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buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
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buf->Reserved = 0;
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buf->InodeType = cpu_to_le64(type);
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buf->ReparseDataLength = cpu_to_le16(len + dlen -
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sizeof(struct reparse_data_buffer));
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*(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) |
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MINOR(dev));
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iov->iov_base = buf;
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iov->iov_len = len + dlen;
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return 0;
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}
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int smb2_make_nfs_node(unsigned int xid, struct inode *inode,
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struct dentry *dentry, struct cifs_tcon *tcon,
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const char *full_path, umode_t mode, dev_t dev)
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{
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struct cifs_open_info_data data;
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struct reparse_posix_data *p;
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struct inode *new;
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struct kvec iov;
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__u8 buf[sizeof(*p) + sizeof(__le64)];
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int rc;
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p = (struct reparse_posix_data *)buf;
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rc = nfs_set_reparse_buf(p, mode, dev, &iov);
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if (rc)
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return rc;
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data = (struct cifs_open_info_data) {
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.reparse_point = true,
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.reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
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};
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new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
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tcon, full_path, &iov);
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if (!IS_ERR(new))
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d_instantiate(dentry, new);
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else
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rc = PTR_ERR(new);
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cifs_free_open_info(&data);
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return rc;
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}
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/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
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static int parse_reparse_posix(struct reparse_posix_data *buf,
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struct cifs_sb_info *cifs_sb,
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struct cifs_open_info_data *data)
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{
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unsigned int len;
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u64 type;
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switch ((type = le64_to_cpu(buf->InodeType))) {
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case NFS_SPECFILE_LNK:
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len = le16_to_cpu(buf->ReparseDataLength);
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data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
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len, true,
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cifs_sb->local_nls);
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if (!data->symlink_target)
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return -ENOMEM;
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convert_delimiter(data->symlink_target, '/');
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cifs_dbg(FYI, "%s: target path: %s\n",
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__func__, data->symlink_target);
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break;
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case NFS_SPECFILE_CHR:
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case NFS_SPECFILE_BLK:
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case NFS_SPECFILE_FIFO:
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case NFS_SPECFILE_SOCK:
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break;
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default:
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cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
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__func__, type);
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
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u32 plen, bool unicode,
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struct cifs_sb_info *cifs_sb,
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struct cifs_open_info_data *data)
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{
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unsigned int len;
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unsigned int offs;
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/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
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offs = le16_to_cpu(sym->SubstituteNameOffset);
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len = le16_to_cpu(sym->SubstituteNameLength);
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if (offs + 20 > plen || offs + len + 20 > plen) {
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cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
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return -EIO;
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}
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data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
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len, unicode,
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cifs_sb->local_nls);
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if (!data->symlink_target)
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return -ENOMEM;
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convert_delimiter(data->symlink_target, '/');
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cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
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return 0;
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}
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int parse_reparse_point(struct reparse_data_buffer *buf,
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u32 plen, struct cifs_sb_info *cifs_sb,
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bool unicode, struct cifs_open_info_data *data)
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{
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data->reparse.buf = buf;
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/* See MS-FSCC 2.1.2 */
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switch (le32_to_cpu(buf->ReparseTag)) {
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case IO_REPARSE_TAG_NFS:
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return parse_reparse_posix((struct reparse_posix_data *)buf,
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cifs_sb, data);
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case IO_REPARSE_TAG_SYMLINK:
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return parse_reparse_symlink(
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(struct reparse_symlink_data_buffer *)buf,
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plen, unicode, cifs_sb, data);
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case IO_REPARSE_TAG_LX_SYMLINK:
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case IO_REPARSE_TAG_AF_UNIX:
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case IO_REPARSE_TAG_LX_FIFO:
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case IO_REPARSE_TAG_LX_CHR:
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case IO_REPARSE_TAG_LX_BLK:
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return 0;
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default:
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cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
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__func__, le32_to_cpu(buf->ReparseTag));
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return -EOPNOTSUPP;
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}
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}
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int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
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struct kvec *rsp_iov,
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struct cifs_open_info_data *data)
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{
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struct reparse_data_buffer *buf;
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struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
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u32 plen = le32_to_cpu(io->OutputCount);
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buf = (struct reparse_data_buffer *)((u8 *)io +
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le32_to_cpu(io->OutputOffset));
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return parse_reparse_point(buf, plen, cifs_sb, true, data);
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}
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bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
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struct cifs_fattr *fattr,
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struct cifs_open_info_data *data)
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{
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struct reparse_posix_data *buf = data->reparse.posix;
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u32 tag = data->reparse.tag;
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if (tag == IO_REPARSE_TAG_NFS && buf) {
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switch (le64_to_cpu(buf->InodeType)) {
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case NFS_SPECFILE_CHR:
|
||||
fattr->cf_mode |= S_IFCHR;
|
||||
fattr->cf_dtype = DT_CHR;
|
||||
fattr->cf_rdev = reparse_nfs_mkdev(buf);
|
||||
break;
|
||||
case NFS_SPECFILE_BLK:
|
||||
fattr->cf_mode |= S_IFBLK;
|
||||
fattr->cf_dtype = DT_BLK;
|
||||
fattr->cf_rdev = reparse_nfs_mkdev(buf);
|
||||
break;
|
||||
case NFS_SPECFILE_FIFO:
|
||||
fattr->cf_mode |= S_IFIFO;
|
||||
fattr->cf_dtype = DT_FIFO;
|
||||
break;
|
||||
case NFS_SPECFILE_SOCK:
|
||||
fattr->cf_mode |= S_IFSOCK;
|
||||
fattr->cf_dtype = DT_SOCK;
|
||||
break;
|
||||
case NFS_SPECFILE_LNK:
|
||||
fattr->cf_mode |= S_IFLNK;
|
||||
fattr->cf_dtype = DT_LNK;
|
||||
break;
|
||||
default:
|
||||
WARN_ON_ONCE(1);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
switch (tag) {
|
||||
case IO_REPARSE_TAG_LX_SYMLINK:
|
||||
fattr->cf_mode |= S_IFLNK;
|
||||
fattr->cf_dtype = DT_LNK;
|
||||
break;
|
||||
case IO_REPARSE_TAG_LX_FIFO:
|
||||
fattr->cf_mode |= S_IFIFO;
|
||||
fattr->cf_dtype = DT_FIFO;
|
||||
break;
|
||||
case IO_REPARSE_TAG_AF_UNIX:
|
||||
fattr->cf_mode |= S_IFSOCK;
|
||||
fattr->cf_dtype = DT_SOCK;
|
||||
break;
|
||||
case IO_REPARSE_TAG_LX_CHR:
|
||||
fattr->cf_mode |= S_IFCHR;
|
||||
fattr->cf_dtype = DT_CHR;
|
||||
break;
|
||||
case IO_REPARSE_TAG_LX_BLK:
|
||||
fattr->cf_mode |= S_IFBLK;
|
||||
fattr->cf_dtype = DT_BLK;
|
||||
break;
|
||||
case 0: /* SMB1 symlink */
|
||||
case IO_REPARSE_TAG_SYMLINK:
|
||||
case IO_REPARSE_TAG_NFS:
|
||||
fattr->cf_mode |= S_IFLNK;
|
||||
fattr->cf_dtype = DT_LNK;
|
||||
break;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
73
fs/smb/client/reparse.h
Normal file
73
fs/smb/client/reparse.h
Normal file
|
|
@ -0,0 +1,73 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
/*
|
||||
* Copyright (c) 2024 Paulo Alcantara <pc@manguebit.com>
|
||||
*/
|
||||
|
||||
#ifndef _CIFS_REPARSE_H
|
||||
#define _CIFS_REPARSE_H
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/stat.h>
|
||||
#include "cifsglob.h"
|
||||
|
||||
static inline dev_t reparse_nfs_mkdev(struct reparse_posix_data *buf)
|
||||
{
|
||||
u64 v = le64_to_cpu(*(__le64 *)buf->DataBuffer);
|
||||
|
||||
return MKDEV(v >> 32, v & 0xffffffff);
|
||||
}
|
||||
|
||||
static inline u64 reparse_mode_nfs_type(mode_t mode)
|
||||
{
|
||||
switch (mode & S_IFMT) {
|
||||
case S_IFBLK: return NFS_SPECFILE_BLK;
|
||||
case S_IFCHR: return NFS_SPECFILE_CHR;
|
||||
case S_IFIFO: return NFS_SPECFILE_FIFO;
|
||||
case S_IFSOCK: return NFS_SPECFILE_SOCK;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Match a reparse point inode if reparse tag and ctime haven't changed.
|
||||
*
|
||||
* Windows Server updates ctime of reparse points when their data have changed.
|
||||
* The server doesn't allow changing reparse tags from existing reparse points,
|
||||
* though it's worth checking.
|
||||
*/
|
||||
static inline bool reparse_inode_match(struct inode *inode,
|
||||
struct cifs_fattr *fattr)
|
||||
{
|
||||
struct timespec64 ctime = inode_get_ctime(inode);
|
||||
|
||||
return (CIFS_I(inode)->cifsAttrs & ATTR_REPARSE) &&
|
||||
CIFS_I(inode)->reparse_tag == fattr->cf_cifstag &&
|
||||
timespec64_equal(&ctime, &fattr->cf_ctime);
|
||||
}
|
||||
|
||||
static inline bool cifs_open_data_reparse(struct cifs_open_info_data *data)
|
||||
{
|
||||
struct smb2_file_all_info *fi = &data->fi;
|
||||
u32 attrs = le32_to_cpu(fi->Attributes);
|
||||
bool ret;
|
||||
|
||||
ret = data->reparse_point || (attrs & ATTR_REPARSE);
|
||||
if (ret)
|
||||
attrs |= ATTR_REPARSE;
|
||||
fi->Attributes = cpu_to_le32(attrs);
|
||||
return ret;
|
||||
}
|
||||
|
||||
bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
|
||||
struct cifs_fattr *fattr,
|
||||
struct cifs_open_info_data *data);
|
||||
int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
|
||||
struct dentry *dentry, struct cifs_tcon *tcon,
|
||||
const char *full_path, const char *symname);
|
||||
int smb2_make_nfs_node(unsigned int xid, struct inode *inode,
|
||||
struct dentry *dentry, struct cifs_tcon *tcon,
|
||||
const char *full_path, umode_t mode, dev_t dev);
|
||||
int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, struct kvec *rsp_iov,
|
||||
struct cifs_open_info_data *data);
|
||||
|
||||
#endif /* _CIFS_REPARSE_H */
|
||||
|
|
@ -28,6 +28,7 @@
|
|||
#include "fscache.h"
|
||||
#include "fs_context.h"
|
||||
#include "cached_dir.h"
|
||||
#include "reparse.h"
|
||||
|
||||
/* Change credits for different ops and return the total number of credits */
|
||||
static int
|
||||
|
|
@ -2986,109 +2987,6 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
|
|||
return rc;
|
||||
}
|
||||
|
||||
/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
|
||||
static int parse_reparse_posix(struct reparse_posix_data *buf,
|
||||
struct cifs_sb_info *cifs_sb,
|
||||
struct cifs_open_info_data *data)
|
||||
{
|
||||
unsigned int len;
|
||||
u64 type;
|
||||
|
||||
switch ((type = le64_to_cpu(buf->InodeType))) {
|
||||
case NFS_SPECFILE_LNK:
|
||||
len = le16_to_cpu(buf->ReparseDataLength);
|
||||
data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
|
||||
len, true,
|
||||
cifs_sb->local_nls);
|
||||
if (!data->symlink_target)
|
||||
return -ENOMEM;
|
||||
convert_delimiter(data->symlink_target, '/');
|
||||
cifs_dbg(FYI, "%s: target path: %s\n",
|
||||
__func__, data->symlink_target);
|
||||
break;
|
||||
case NFS_SPECFILE_CHR:
|
||||
case NFS_SPECFILE_BLK:
|
||||
case NFS_SPECFILE_FIFO:
|
||||
case NFS_SPECFILE_SOCK:
|
||||
break;
|
||||
default:
|
||||
cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
|
||||
__func__, type);
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
|
||||
u32 plen, bool unicode,
|
||||
struct cifs_sb_info *cifs_sb,
|
||||
struct cifs_open_info_data *data)
|
||||
{
|
||||
unsigned int len;
|
||||
unsigned int offs;
|
||||
|
||||
/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
|
||||
|
||||
offs = le16_to_cpu(sym->SubstituteNameOffset);
|
||||
len = le16_to_cpu(sym->SubstituteNameLength);
|
||||
if (offs + 20 > plen || offs + len + 20 > plen) {
|
||||
cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
|
||||
len, unicode,
|
||||
cifs_sb->local_nls);
|
||||
if (!data->symlink_target)
|
||||
return -ENOMEM;
|
||||
|
||||
convert_delimiter(data->symlink_target, '/');
|
||||
cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int parse_reparse_point(struct reparse_data_buffer *buf,
|
||||
u32 plen, struct cifs_sb_info *cifs_sb,
|
||||
bool unicode, struct cifs_open_info_data *data)
|
||||
{
|
||||
data->reparse.buf = buf;
|
||||
|
||||
/* See MS-FSCC 2.1.2 */
|
||||
switch (le32_to_cpu(buf->ReparseTag)) {
|
||||
case IO_REPARSE_TAG_NFS:
|
||||
return parse_reparse_posix((struct reparse_posix_data *)buf,
|
||||
cifs_sb, data);
|
||||
case IO_REPARSE_TAG_SYMLINK:
|
||||
return parse_reparse_symlink(
|
||||
(struct reparse_symlink_data_buffer *)buf,
|
||||
plen, unicode, cifs_sb, data);
|
||||
case IO_REPARSE_TAG_LX_SYMLINK:
|
||||
case IO_REPARSE_TAG_AF_UNIX:
|
||||
case IO_REPARSE_TAG_LX_FIFO:
|
||||
case IO_REPARSE_TAG_LX_CHR:
|
||||
case IO_REPARSE_TAG_LX_BLK:
|
||||
return 0;
|
||||
default:
|
||||
cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
|
||||
__func__, le32_to_cpu(buf->ReparseTag));
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
}
|
||||
|
||||
static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
|
||||
struct kvec *rsp_iov,
|
||||
struct cifs_open_info_data *data)
|
||||
{
|
||||
struct reparse_data_buffer *buf;
|
||||
struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
|
||||
u32 plen = le32_to_cpu(io->OutputCount);
|
||||
|
||||
buf = (struct reparse_data_buffer *)((u8 *)io +
|
||||
le32_to_cpu(io->OutputOffset));
|
||||
return parse_reparse_point(buf, plen, cifs_sb, true, data);
|
||||
}
|
||||
|
||||
static struct cifs_ntsd *
|
||||
get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
|
||||
const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
|
||||
|
|
@ -5128,152 +5026,6 @@ int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
|
|||
return rc;
|
||||
}
|
||||
|
||||
static inline u64 mode_nfs_type(mode_t mode)
|
||||
{
|
||||
switch (mode & S_IFMT) {
|
||||
case S_IFBLK: return NFS_SPECFILE_BLK;
|
||||
case S_IFCHR: return NFS_SPECFILE_CHR;
|
||||
case S_IFIFO: return NFS_SPECFILE_FIFO;
|
||||
case S_IFSOCK: return NFS_SPECFILE_SOCK;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
|
||||
mode_t mode, dev_t dev,
|
||||
struct kvec *iov)
|
||||
{
|
||||
u64 type;
|
||||
u16 len, dlen;
|
||||
|
||||
len = sizeof(*buf);
|
||||
|
||||
switch ((type = mode_nfs_type(mode))) {
|
||||
case NFS_SPECFILE_BLK:
|
||||
case NFS_SPECFILE_CHR:
|
||||
dlen = sizeof(__le64);
|
||||
break;
|
||||
case NFS_SPECFILE_FIFO:
|
||||
case NFS_SPECFILE_SOCK:
|
||||
dlen = 0;
|
||||
break;
|
||||
default:
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
|
||||
buf->Reserved = 0;
|
||||
buf->InodeType = cpu_to_le64(type);
|
||||
buf->ReparseDataLength = cpu_to_le16(len + dlen -
|
||||
sizeof(struct reparse_data_buffer));
|
||||
*(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) |
|
||||
MINOR(dev));
|
||||
iov->iov_base = buf;
|
||||
iov->iov_len = len + dlen;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nfs_make_node(unsigned int xid, struct inode *inode,
|
||||
struct dentry *dentry, struct cifs_tcon *tcon,
|
||||
const char *full_path, umode_t mode, dev_t dev)
|
||||
{
|
||||
struct cifs_open_info_data data;
|
||||
struct reparse_posix_data *p;
|
||||
struct inode *new;
|
||||
struct kvec iov;
|
||||
__u8 buf[sizeof(*p) + sizeof(__le64)];
|
||||
int rc;
|
||||
|
||||
p = (struct reparse_posix_data *)buf;
|
||||
rc = nfs_set_reparse_buf(p, mode, dev, &iov);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
data = (struct cifs_open_info_data) {
|
||||
.reparse_point = true,
|
||||
.reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
|
||||
};
|
||||
|
||||
new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
|
||||
tcon, full_path, &iov);
|
||||
if (!IS_ERR(new))
|
||||
d_instantiate(dentry, new);
|
||||
else
|
||||
rc = PTR_ERR(new);
|
||||
cifs_free_open_info(&data);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int smb2_create_reparse_symlink(const unsigned int xid,
|
||||
struct inode *inode,
|
||||
struct dentry *dentry,
|
||||
struct cifs_tcon *tcon,
|
||||
const char *full_path,
|
||||
const char *symname)
|
||||
{
|
||||
struct reparse_symlink_data_buffer *buf = NULL;
|
||||
struct cifs_open_info_data data;
|
||||
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
||||
struct inode *new;
|
||||
struct kvec iov;
|
||||
__le16 *path;
|
||||
char *sym, sep = CIFS_DIR_SEP(cifs_sb);
|
||||
u16 len, plen;
|
||||
int rc = 0;
|
||||
|
||||
sym = kstrdup(symname, GFP_KERNEL);
|
||||
if (!sym)
|
||||
return -ENOMEM;
|
||||
|
||||
data = (struct cifs_open_info_data) {
|
||||
.reparse_point = true,
|
||||
.reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
|
||||
.symlink_target = sym,
|
||||
};
|
||||
|
||||
convert_delimiter(sym, sep);
|
||||
path = cifs_convert_path_to_utf16(sym, cifs_sb);
|
||||
if (!path) {
|
||||
rc = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX);
|
||||
len = sizeof(*buf) + plen * 2;
|
||||
buf = kzalloc(len, GFP_KERNEL);
|
||||
if (!buf) {
|
||||
rc = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
|
||||
buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
|
||||
buf->SubstituteNameOffset = cpu_to_le16(plen);
|
||||
buf->SubstituteNameLength = cpu_to_le16(plen);
|
||||
memcpy(&buf->PathBuffer[plen], path, plen);
|
||||
buf->PrintNameOffset = 0;
|
||||
buf->PrintNameLength = cpu_to_le16(plen);
|
||||
memcpy(buf->PathBuffer, path, plen);
|
||||
buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
|
||||
if (*sym != sep)
|
||||
buf->Flags = cpu_to_le32(SYMLINK_FLAG_RELATIVE);
|
||||
|
||||
convert_delimiter(sym, '/');
|
||||
iov.iov_base = buf;
|
||||
iov.iov_len = len;
|
||||
new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
|
||||
tcon, full_path, &iov);
|
||||
if (!IS_ERR(new))
|
||||
d_instantiate(dentry, new);
|
||||
else
|
||||
rc = PTR_ERR(new);
|
||||
out:
|
||||
kfree(path);
|
||||
cifs_free_open_info(&data);
|
||||
kfree(buf);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int smb2_make_node(unsigned int xid, struct inode *inode,
|
||||
struct dentry *dentry, struct cifs_tcon *tcon,
|
||||
const char *full_path, umode_t mode, dev_t dev)
|
||||
|
|
@ -5291,8 +5043,8 @@ static int smb2_make_node(unsigned int xid, struct inode *inode,
|
|||
rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
|
||||
full_path, mode, dev);
|
||||
} else {
|
||||
rc = nfs_make_node(xid, inode, dentry, tcon,
|
||||
full_path, mode, dev);
|
||||
rc = smb2_make_nfs_node(xid, inode, dentry, tcon,
|
||||
full_path, mode, dev);
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -310,5 +310,11 @@ int smb311_posix_query_path_info(const unsigned int xid,
|
|||
int posix_info_parse(const void *beg, const void *end,
|
||||
struct smb2_posix_info_parsed *out);
|
||||
int posix_info_sid_size(const void *beg, const void *end);
|
||||
int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
|
||||
struct dentry *dentry, struct cifs_tcon *tcon,
|
||||
const char *full_path, const char *symname);
|
||||
int smb2_make_nfs_node(unsigned int xid, struct inode *inode,
|
||||
struct dentry *dentry, struct cifs_tcon *tcon,
|
||||
const char *full_path, umode_t mode, dev_t dev);
|
||||
|
||||
#endif /* _SMB2PROTO_H */
|
||||
|
|
|
|||
Loading…
Reference in a new issue