diff options
Diffstat (limited to 'fs')
-rw-r--r-- | fs/smb/client/cifsglob.h | 8 | ||||
-rw-r--r-- | fs/smb/client/cifspdu.h | 2 | ||||
-rw-r--r-- | fs/smb/client/cifsproto.h | 4 | ||||
-rw-r--r-- | fs/smb/client/inode.c | 51 | ||||
-rw-r--r-- | fs/smb/client/readdir.c | 6 | ||||
-rw-r--r-- | fs/smb/client/smb1ops.c | 3 | ||||
-rw-r--r-- | fs/smb/client/smb2inode.c | 2 | ||||
-rw-r--r-- | fs/smb/client/smb2ops.c | 101 |
8 files changed, 116 insertions, 61 deletions
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index 111daa4ff261..7558167f603c 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -191,7 +191,13 @@ struct cifs_open_info_data { bool reparse_point; bool symlink; }; - __u32 reparse_tag; + struct { + __u32 tag; + union { + struct reparse_data_buffer *buf; + struct reparse_posix_data *posix; + }; + } reparse; char *symlink_target; union { struct smb2_file_all_info fi; diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h index 2a90134331a4..83ccc51a54d0 100644 --- a/fs/smb/client/cifspdu.h +++ b/fs/smb/client/cifspdu.h @@ -1509,7 +1509,7 @@ struct reparse_posix_data { __le16 ReparseDataLength; __u16 Reserved; __le64 InodeType; /* LNK, FIFO, CHR etc. */ - char PathBuffer[]; + __u8 DataBuffer[]; } __attribute__((packed)); struct cifs_quota_data { diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index 8a739c10d634..c00f84420559 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -210,7 +210,7 @@ int cifs_get_inode_info(struct inode **inode, const char *full_path, const struct cifs_fid *fid); bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, - u32 tag); + struct cifs_open_info_data *data); extern int smb311_posix_get_inode_info(struct inode **pinode, const char *search_path, struct super_block *sb, unsigned int xid); extern int cifs_get_inode_info_unix(struct inode **pinode, @@ -667,7 +667,7 @@ char *extract_hostname(const char *unc); char *extract_sharename(const char *unc); int parse_reparse_point(struct reparse_data_buffer *buf, u32 plen, struct cifs_sb_info *cifs_sb, - bool unicode, char **target_path); + bool unicode, struct cifs_open_info_data *data); #ifdef CONFIG_CIFS_DFS_UPCALL static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses, diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index dd482de3dc3f..47f49be69ced 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -721,10 +721,51 @@ static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink); } +static inline dev_t nfs_mkdev(struct reparse_posix_data *buf) +{ + u64 v = le64_to_cpu(*(__le64 *)buf->DataBuffer); + + return MKDEV(v >> 32, v & 0xffffffff); +} + bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, - u32 tag) + struct cifs_open_info_data *data) { + struct reparse_posix_data *buf = data->reparse.posix; + u32 tag = data->reparse.tag; + + if (tag == IO_REPARSE_TAG_NFS && buf) { + switch (le64_to_cpu(buf->InodeType)) { + case NFS_SPECFILE_CHR: + fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode; + fattr->cf_dtype = DT_CHR; + fattr->cf_rdev = nfs_mkdev(buf); + break; + case NFS_SPECFILE_BLK: + fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode; + fattr->cf_dtype = DT_BLK; + fattr->cf_rdev = nfs_mkdev(buf); + break; + case NFS_SPECFILE_FIFO: + fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode; + fattr->cf_dtype = DT_FIFO; + break; + case NFS_SPECFILE_SOCK: + fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode; + fattr->cf_dtype = DT_SOCK; + break; + case NFS_SPECFILE_LNK: + fattr->cf_mode = S_IFLNK | cifs_sb->ctx->file_mode; + 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 | cifs_sb->ctx->file_mode; @@ -790,7 +831,7 @@ static void cifs_open_info_to_fattr(struct cifs_fattr *fattr, fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); if (cifs_open_data_reparse(data) && - cifs_reparse_point_to_fattr(cifs_sb, fattr, data->reparse_tag)) + cifs_reparse_point_to_fattr(cifs_sb, fattr, data)) goto out_reparse; if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { @@ -855,7 +896,7 @@ cifs_get_file_info(struct file *filp) data.adjust_tz = false; if (data.symlink_target) { data.symlink = true; - data.reparse_tag = IO_REPARSE_TAG_SYMLINK; + data.reparse.tag = IO_REPARSE_TAG_SYMLINK; } cifs_open_info_to_fattr(&fattr, &data, inode->i_sb); break; @@ -1024,7 +1065,7 @@ static int reparse_info_to_fattr(struct cifs_open_info_data *data, struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct kvec rsp_iov, *iov = NULL; int rsp_buftype = CIFS_NO_BUFFER; - u32 tag = data->reparse_tag; + u32 tag = data->reparse.tag; int rc = 0; if (!tag && server->ops->query_reparse_point) { @@ -1036,7 +1077,7 @@ static int reparse_info_to_fattr(struct cifs_open_info_data *data, } rc = -EOPNOTSUPP; - switch ((data->reparse_tag = tag)) { + switch ((data->reparse.tag = tag)) { case 0: /* SMB1 symlink */ if (server->ops->query_symlink) { rc = server->ops->query_symlink(xid, tcon, diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c index 47fc22de8d20..d30ea2005eb3 100644 --- a/fs/smb/client/readdir.c +++ b/fs/smb/client/readdir.c @@ -153,6 +153,10 @@ static bool reparse_file_needs_reval(const struct cifs_fattr *fattr) static void cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) { + struct cifs_open_info_data data = { + .reparse = { .tag = fattr->cf_cifstag, }, + }; + fattr->cf_uid = cifs_sb->ctx->linux_uid; fattr->cf_gid = cifs_sb->ctx->linux_gid; @@ -165,7 +169,7 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) * reasonably map some of them to directories vs. files vs. symlinks */ if ((fattr->cf_cifsattrs & ATTR_REPARSE) && - cifs_reparse_point_to_fattr(cifs_sb, fattr, fattr->cf_cifstag)) + cifs_reparse_point_to_fattr(cifs_sb, fattr, &data)) goto out_reparse; if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c index 0dd599004e04..64e25233e85d 100644 --- a/fs/smb/client/smb1ops.c +++ b/fs/smb/client/smb1ops.c @@ -1004,8 +1004,7 @@ static int cifs_parse_reparse_point(struct cifs_sb_info *cifs_sb, buf = (struct reparse_data_buffer *)((__u8 *)&io->hdr.Protocol + le32_to_cpu(io->DataOffset)); - return parse_reparse_point(buf, plen, cifs_sb, unicode, - &data->symlink_target); + return parse_reparse_point(buf, plen, cifs_sb, unicode, data); } static bool diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c index 0b89f7008ac0..c94940af5d4b 100644 --- a/fs/smb/client/smb2inode.c +++ b/fs/smb/client/smb2inode.c @@ -555,7 +555,7 @@ static int parse_create_response(struct cifs_open_info_data *data, break; } data->reparse_point = reparse_point; - data->reparse_tag = tag; + data->reparse.tag = tag; return rc; } diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 2955eaa51d4d..f01a929a7a3a 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -2866,89 +2866,95 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, return rc; } -static int -parse_reparse_posix(struct reparse_posix_data *symlink_buf, - u32 plen, char **target_path, - struct cifs_sb_info *cifs_sb) +/* 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; - - /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ - len = le16_to_cpu(symlink_buf->ReparseDataLength); - - if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) { - cifs_dbg(VFS, "%lld not a supported symlink type\n", - le64_to_cpu(symlink_buf->InodeType)); + 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; } - - *target_path = cifs_strndup_from_utf16( - symlink_buf->PathBuffer, - len, true, cifs_sb->local_nls); - if (!(*target_path)) - return -ENOMEM; - - convert_delimiter(*target_path, '/'); - cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); - return 0; } static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym, - u32 plen, bool unicode, char **target_path, - struct cifs_sb_info *cifs_sb) + u32 plen, bool unicode, + struct cifs_sb_info *cifs_sb, + struct cifs_open_info_data *data) { - unsigned int sub_len; - unsigned int sub_offset; + unsigned int len; + unsigned int offs; /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ - sub_offset = le16_to_cpu(sym->SubstituteNameOffset); - sub_len = le16_to_cpu(sym->SubstituteNameLength); - if (sub_offset + 20 > plen || - sub_offset + sub_len + 20 > plen) { + 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; } - *target_path = cifs_strndup_from_utf16(sym->PathBuffer + sub_offset, - sub_len, unicode, - cifs_sb->local_nls); - if (!(*target_path)) + data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs, + len, unicode, + cifs_sb->local_nls); + if (!data->symlink_target) return -ENOMEM; - convert_delimiter(*target_path, '/'); - cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); + 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, char **target_path) + bool unicode, struct cifs_open_info_data *data) { if (plen < sizeof(*buf)) { - cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n", - plen); + cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n", + __func__, plen); return -EIO; } if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) { - cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n", - plen); + cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n", + __func__, plen); return -EIO; } + 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, - plen, target_path, cifs_sb); + 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, target_path, cifs_sb); + plen, unicode, cifs_sb, data); case IO_REPARSE_TAG_LX_SYMLINK: case IO_REPARSE_TAG_AF_UNIX: case IO_REPARSE_TAG_LX_FIFO: @@ -2956,8 +2962,8 @@ int parse_reparse_point(struct reparse_data_buffer *buf, case IO_REPARSE_TAG_LX_BLK: return 0; default: - cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n", - le32_to_cpu(buf->ReparseTag)); + cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n", + __func__, le32_to_cpu(buf->ReparseTag)); return -EOPNOTSUPP; } } @@ -2972,8 +2978,7 @@ static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, buf = (struct reparse_data_buffer *)((u8 *)io + le32_to_cpu(io->OutputOffset)); - return parse_reparse_point(buf, plen, cifs_sb, - true, &data->symlink_target); + return parse_reparse_point(buf, plen, cifs_sb, true, data); } static int smb2_query_reparse_point(const unsigned int xid, |