diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index dd75746e60cd..7b69037bed24 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -137,6 +137,8 @@ extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool); extern int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only, struct cifsFileInfo **ret_file); +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 unsigned int smbCalcSize(void *buf, struct TCP_Server_Info *server); extern int decode_negTokenInit(unsigned char *security_blob, int length, diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index be424e81e3ad..dd5ac841aefa 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -125,7 +125,7 @@ cifs_bp_rename_retry: } rcu_read_unlock(); - full_path = kmalloc(namelen+1, GFP_KERNEL); + full_path = kmalloc(namelen+1, GFP_ATOMIC); if (full_path == NULL) return full_path; full_path[namelen] = 0; /* trailing null */ diff --git a/fs/cifs/file.c b/fs/cifs/file.c index f16f6d2b5217..6124b1d1ab05 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1973,6 +1973,41 @@ find_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only) return cfile; } +int +cifs_get_writable_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); + return cifs_get_writable_file(cinode, 0, ret_file); + } + + 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 d8d9cdfa30b6..939fc7b2234c 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -51,7 +51,8 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, __u32 desired_access, __u32 create_disposition, - __u32 create_options, void *ptr, int command) + __u32 create_options, void *ptr, int command, + struct cifsFileInfo *cfile) { int rc; __le16 *utf16_path = NULL; @@ -83,10 +84,16 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); + /* We already have a handle so we can skip the open */ + if (cfile) + goto after_open; + /* Open */ utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); - if (!utf16_path) - return -ENOMEM; + if (!utf16_path) { + rc = -ENOMEM; + goto finished; + } oparms.tcon = tcon; oparms.desired_access = desired_access; @@ -106,7 +113,10 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto finished; - smb2_set_next_command(tcon, &rqst[num_rqst++]); + smb2_set_next_command(tcon, &rqst[num_rqst]); + after_open: + num_rqst++; + rc = 0; /* Operation */ switch (command) { @@ -210,14 +220,23 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, size[1] = len + 2 /* null */; data[1] = (__le16 *)ptr; - rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID, current->tgid, - FILE_RENAME_INFORMATION, + if (cfile) + rc = SMB2_set_info_init(tcon, &rqst[num_rqst], + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); + else { + rc = SMB2_set_info_init(tcon, &rqst[num_rqst], + COMPOUND_FID, COMPOUND_FID, + current->tgid, FILE_RENAME_INFORMATION, + SMB2_O_INFO_FILE, 0, data, size); + 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_rename_enter(xid, ses->Suid, tcon->tid, full_path); break; case SMB2_OP_HARDLINK: @@ -254,20 +273,36 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto finished; + /* We already have a handle so we can skip the close */ + if (cfile) + goto after_close; /* Close */ memset(&close_iov, 0, sizeof(close_iov)); rqst[num_rqst].rq_iov = close_iov; rqst[num_rqst].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID, COMPOUND_FID); - smb2_set_related(&rqst[num_rqst++]); + smb2_set_related(&rqst[num_rqst]); if (rc) goto finished; + after_close: + num_rqst++; - rc = compound_send_recv(xid, ses, flags, num_rqst, rqst, - resp_buftype, rsp_iov); + if (cfile) { + cifsFileInfo_put(cfile); + cfile = NULL; + rc = compound_send_recv(xid, ses, flags, num_rqst - 2, + &rqst[1], &resp_buftype[1], + &rsp_iov[1]); + } else + rc = compound_send_recv(xid, ses, flags, num_rqst, + rqst, resp_buftype, + rsp_iov); finished: + if (cfile) + cifsFileInfo_put(cfile); + SMB2_open_free(&rqst[0]); switch (command) { case SMB2_OP_QUERY_INFO: @@ -404,7 +439,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, create_options, - smb2_data, SMB2_OP_QUERY_INFO); + smb2_data, SMB2_OP_QUERY_INFO, NULL); if (rc == -EOPNOTSUPP) { *symlink = true; create_options |= OPEN_REPARSE_POINT; @@ -413,7 +448,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, create_options, smb2_data, - SMB2_OP_QUERY_INFO); + SMB2_OP_QUERY_INFO, NULL); } if (rc) goto out; @@ -430,7 +465,7 @@ smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, { return smb2_compound_op(xid, tcon, cifs_sb, name, FILE_WRITE_ATTRIBUTES, FILE_CREATE, - CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR); + CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR, NULL); } void @@ -449,7 +484,8 @@ smb2_mkdir_setinfo(struct inode *inode, const char *name, data.Attributes = cpu_to_le32(dosattrs); tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, FILE_WRITE_ATTRIBUTES, FILE_CREATE, - CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO); + CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO, + NULL); if (tmprc == 0) cifs_i->cifsAttrs = dosattrs; } @@ -460,7 +496,7 @@ smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, { return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, CREATE_NOT_FILE, - NULL, SMB2_OP_RMDIR); + NULL, SMB2_OP_RMDIR, NULL); } int @@ -469,13 +505,14 @@ smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, { return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, - NULL, SMB2_OP_DELETE); + NULL, SMB2_OP_DELETE, NULL); } static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, const char *from_name, const char *to_name, - struct cifs_sb_info *cifs_sb, __u32 access, int command) + struct cifs_sb_info *cifs_sb, __u32 access, int command, + struct cifsFileInfo *cfile) { __le16 *smb2_to_name = NULL; int rc; @@ -486,7 +523,7 @@ smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, goto smb2_rename_path; } rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access, - FILE_OPEN, 0, smb2_to_name, command); + FILE_OPEN, 0, smb2_to_name, command, cfile); smb2_rename_path: kfree(smb2_to_name); return rc; @@ -497,8 +534,12 @@ smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, const char *from_name, const char *to_name, struct cifs_sb_info *cifs_sb) { - return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, - DELETE, SMB2_OP_RENAME); + struct cifsFileInfo *cfile; + + cifs_get_writable_path(tcon, from_name, &cfile); + + return smb2_set_path_attr(xid, tcon, from_name, to_name, + cifs_sb, DELETE, SMB2_OP_RENAME, cfile); } int @@ -507,7 +548,8 @@ smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb) { return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, - FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK); + FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK, + NULL); } int @@ -519,7 +561,7 @@ smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, return smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_WRITE_DATA, FILE_OPEN, 0, &eof, - SMB2_OP_SET_EOF); + SMB2_OP_SET_EOF, NULL); } int @@ -541,7 +583,7 @@ smb2_set_file_info(struct inode *inode, const char *full_path, rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path, FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf, - SMB2_OP_SET_INFO); + SMB2_OP_SET_INFO, NULL); cifs_put_tlink(tlink); return rc; }