diff options
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/cifsproto.h | 2 | ||||
| -rw-r--r-- | fs/cifs/file.c | 36 | ||||
| -rw-r--r-- | fs/cifs/smb2inode.c | 28 |
3 files changed, 61 insertions, 5 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 7b69037bed24..99b1b1ef558c 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -140,6 +140,8 @@ extern int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, extern int cifs_get_writable_path(struct cifs_tcon *tcon, const char *name, struct cifsFileInfo **ret_file); extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool); +extern int cifs_get_readable_path(struct cifs_tcon *tcon, const char *name, + struct cifsFileInfo **ret_file); extern unsigned int smbCalcSize(void *buf, struct TCP_Server_Info *server); extern int decode_negTokenInit(unsigned char *security_blob, int length, struct TCP_Server_Info *server); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 6124b1d1ab05..4b95700c507c 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2008,6 +2008,42 @@ cifs_get_writable_path(struct cifs_tcon *tcon, const char *name, return -ENOENT; } +int +cifs_get_readable_path(struct cifs_tcon *tcon, const char *name, + struct cifsFileInfo **ret_file) +{ + struct list_head *tmp; + struct cifsFileInfo *cfile; + struct cifsInodeInfo *cinode; + char *full_path; + + *ret_file = NULL; + + spin_lock(&tcon->open_file_lock); + list_for_each(tmp, &tcon->openFileList) { + cfile = list_entry(tmp, struct cifsFileInfo, + tlist); + full_path = build_path_from_dentry(cfile->dentry); + if (full_path == NULL) { + spin_unlock(&tcon->open_file_lock); + return -ENOMEM; + } + if (strcmp(full_path, name)) { + kfree(full_path); + continue; + } + + kfree(full_path); + cinode = CIFS_I(d_inode(cfile->dentry)); + spin_unlock(&tcon->open_file_lock); + *ret_file = find_readable_file(cinode, 0); + return *ret_file ? 0 : -ENOENT; + } + + spin_unlock(&tcon->open_file_lock); + return -ENOENT; +} + static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) { struct address_space *mapping = page->mapping; diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index 9bb0a5bc38c9..c866555b6278 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -125,15 +125,31 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, rqst[num_rqst].rq_iov = qi_iov; rqst[num_rqst].rq_nvec = 1; - rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID, FILE_ALL_INFORMATION, + if (cfile) + rc = SMB2_query_info_init(tcon, &rqst[num_rqst], + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 0, NULL); + else { + rc = SMB2_query_info_init(tcon, &rqst[num_rqst], + COMPOUND_FID, + COMPOUND_FID, + FILE_ALL_INFORMATION, + SMB2_O_INFO_FILE, 0, + sizeof(struct smb2_file_all_info) + + PATH_MAX * 2, 0, NULL); + if (!rc) { + smb2_set_next_command(tcon, &rqst[num_rqst]); + smb2_set_related(&rqst[num_rqst]); + } + } + if (rc) goto finished; - smb2_set_next_command(tcon, &rqst[num_rqst]); - smb2_set_related(&rqst[num_rqst++]); + num_rqst++; trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path); break; @@ -421,6 +437,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, __u32 create_options = 0; struct cifs_fid fid; bool no_cached_open = tcon->nohandlecache; + struct cifsFileInfo *cfile; *adjust_tz = false; *symlink = false; @@ -452,9 +469,10 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; + cifs_get_readable_path(tcon, full_path, &cfile); rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, create_options, - smb2_data, SMB2_OP_QUERY_INFO, NULL); + smb2_data, SMB2_OP_QUERY_INFO, cfile); if (rc == -EOPNOTSUPP) { *symlink = true; create_options |= OPEN_REPARSE_POINT; |