diff options
Diffstat (limited to 'fs/cifs/readdir.c')
| -rw-r--r-- | fs/cifs/readdir.c | 60 |
1 files changed, 42 insertions, 18 deletions
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 6df0922e7e30..799be3a5d25e 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -168,10 +168,33 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) fattr->cf_uid = cifs_sb->mnt_uid; fattr->cf_gid = cifs_sb->mnt_gid; + /* + * The IO_REPARSE_TAG_LX_ tags originally were used by WSL but they + * are preferred by the Linux client in some cases since, unlike + * the NFS reparse tag (or EAs), they don't require an extra query + * to determine which type of special file they represent. + * TODO: go through all documented reparse tags to see if we can + * reasonably map some of them to directories vs. files vs. symlinks + */ if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; fattr->cf_dtype = DT_DIR; - } else { + } else if (fattr->cf_cifstag == IO_REPARSE_TAG_LX_SYMLINK) { + fattr->cf_mode |= S_IFLNK | cifs_sb->mnt_file_mode; + fattr->cf_dtype = DT_LNK; + } else if (fattr->cf_cifstag == IO_REPARSE_TAG_LX_FIFO) { + fattr->cf_mode |= S_IFIFO | cifs_sb->mnt_file_mode; + fattr->cf_dtype = DT_FIFO; + } else if (fattr->cf_cifstag == IO_REPARSE_TAG_AF_UNIX) { + fattr->cf_mode |= S_IFSOCK | cifs_sb->mnt_file_mode; + fattr->cf_dtype = DT_SOCK; + } else if (fattr->cf_cifstag == IO_REPARSE_TAG_LX_CHR) { + fattr->cf_mode |= S_IFCHR | cifs_sb->mnt_file_mode; + fattr->cf_dtype = DT_CHR; + } else if (fattr->cf_cifstag == IO_REPARSE_TAG_LX_BLK) { + fattr->cf_mode |= S_IFBLK | cifs_sb->mnt_file_mode; + fattr->cf_dtype = DT_BLK; + } else { /* TODO: should we mark some other reparse points (like DFSR) as directories? */ fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; fattr->cf_dtype = DT_REG; } @@ -267,9 +290,8 @@ cifs_posix_to_fattr(struct cifs_fattr *fattr, struct smb2_posix_info *info, if (reparse_file_needs_reval(fattr)) fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; - /* TODO map SIDs */ - fattr->cf_uid = cifs_sb->mnt_uid; - fattr->cf_gid = cifs_sb->mnt_gid; + sid_to_id(cifs_sb, &parsed.owner, fattr, SIDOWNER); + sid_to_id(cifs_sb, &parsed.group, fattr, SIDGROUP); } static void __dir_info_to_fattr(struct cifs_fattr *fattr, const void *info) @@ -360,11 +382,11 @@ int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, */ static int -initiate_cifs_search(const unsigned int xid, struct file *file) +initiate_cifs_search(const unsigned int xid, struct file *file, + char *full_path) { __u16 search_flags; int rc = 0; - char *full_path = NULL; struct cifsFileInfo *cifsFile; struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); struct tcon_link *tlink = NULL; @@ -400,12 +422,6 @@ initiate_cifs_search(const unsigned int xid, struct file *file) cifsFile->invalidHandle = true; cifsFile->srch_inf.endOfSearch = false; - full_path = build_path_from_dentry(file_dentry(file)); - if (full_path == NULL) { - rc = -ENOMEM; - goto error_exit; - } - cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos); ffirst_retry: @@ -444,7 +460,6 @@ ffirst_retry: goto ffirst_retry; } error_exit: - kfree(full_path); cifs_put_tlink(tlink); return rc; } @@ -688,7 +703,8 @@ static int cifs_save_resume_key(const char *current_entry, */ static int find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos, - struct file *file, char **current_entry, int *num_to_ret) + struct file *file, char *full_path, + char **current_entry, int *num_to_ret) { __u16 search_flags; int rc = 0; @@ -741,7 +757,7 @@ find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos, ntwrk_buf_start); cfile->srch_inf.ntwrk_buf_start = NULL; } - rc = initiate_cifs_search(xid, file); + rc = initiate_cifs_search(xid, file, full_path); if (rc) { cifs_dbg(FYI, "error %d reinitiating a search on rewind\n", rc); @@ -925,15 +941,22 @@ int cifs_readdir(struct file *file, struct dir_context *ctx) char *tmp_buf = NULL; char *end_of_smb; unsigned int max_len; + char *full_path = NULL; xid = get_xid(); + full_path = build_path_from_dentry(file_dentry(file)); + if (full_path == NULL) { + rc = -ENOMEM; + goto rddir2_exit; + } + /* * Ensure FindFirst doesn't fail before doing filldir() for '.' and * '..'. Otherwise we won't be able to notify VFS in case of failure. */ if (file->private_data == NULL) { - rc = initiate_cifs_search(xid, file); + rc = initiate_cifs_search(xid, file, full_path); cifs_dbg(FYI, "initiate cifs search rc %d\n", rc); if (rc) goto rddir2_exit; @@ -960,8 +983,8 @@ int cifs_readdir(struct file *file, struct dir_context *ctx) } */ tcon = tlink_tcon(cifsFile->tlink); - rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry, - &num_to_fill); + rc = find_cifs_entry(xid, tcon, ctx->pos, file, full_path, + ¤t_entry, &num_to_fill); if (rc) { cifs_dbg(FYI, "fce error %d\n", rc); goto rddir2_exit; @@ -1019,6 +1042,7 @@ int cifs_readdir(struct file *file, struct dir_context *ctx) kfree(tmp_buf); rddir2_exit: + kfree(full_path); free_xid(xid); return rc; } |