| /* |
| * fs/cifs/smb2inode.c |
| * |
| * Copyright (C) International Business Machines Corp., 2002, 2011 |
| * Etersoft, 2012 |
| * Author(s): Pavel Shilovsky (pshilovsky@samba.org), |
| * Steve French (sfrench@us.ibm.com) |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <linux/fs.h> |
| #include <linux/stat.h> |
| #include <linux/slab.h> |
| #include <linux/pagemap.h> |
| #include <asm/div64.h> |
| #include "cifsfs.h" |
| #include "cifspdu.h" |
| #include "cifsglob.h" |
| #include "cifsproto.h" |
| #include "cifs_debug.h" |
| #include "cifs_fs_sb.h" |
| #include "cifs_unicode.h" |
| #include "fscache.h" |
| #include "smb2glob.h" |
| #include "smb2pdu.h" |
| #include "smb2proto.h" |
| |
| static void |
| free_set_inf_compound(struct smb_rqst *rqst) |
| { |
| if (rqst[1].rq_iov) |
| SMB2_set_info_free(&rqst[1]); |
| if (rqst[2].rq_iov) |
| SMB2_close_free(&rqst[2]); |
| } |
| |
| |
| struct cop_vars { |
| struct cifs_open_parms oparms; |
| struct kvec rsp_iov[3]; |
| struct smb_rqst rqst[3]; |
| struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; |
| struct kvec qi_iov[1]; |
| struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; |
| struct kvec close_iov[1]; |
| struct smb2_file_rename_info rename_info; |
| struct smb2_file_link_info link_info; |
| }; |
| |
| 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, umode_t mode, void *ptr, int command, |
| struct cifsFileInfo *cfile) |
| { |
| struct cop_vars *vars = NULL; |
| struct kvec *rsp_iov; |
| struct smb_rqst *rqst; |
| int rc; |
| __le16 *utf16_path = NULL; |
| __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; |
| struct cifs_fid fid; |
| struct cifs_ses *ses = tcon->ses; |
| struct TCP_Server_Info *server; |
| int num_rqst = 0; |
| int resp_buftype[3]; |
| struct smb2_query_info_rsp *qi_rsp = NULL; |
| int flags = 0; |
| __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0}; |
| unsigned int size[2]; |
| void *data[2]; |
| int len; |
| |
| vars = kzalloc(sizeof(*vars), GFP_ATOMIC); |
| if (vars == NULL) |
| return -ENOMEM; |
| rqst = &vars->rqst[0]; |
| rsp_iov = &vars->rsp_iov[0]; |
| |
| server = cifs_pick_channel(ses); |
| |
| if (smb3_encryption_required(tcon)) |
| flags |= CIFS_TRANSFORM_REQ; |
| |
| resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; |
| |
| /* 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) { |
| rc = -ENOMEM; |
| goto finished; |
| } |
| |
| vars->oparms.tcon = tcon; |
| vars->oparms.desired_access = desired_access; |
| vars->oparms.disposition = create_disposition; |
| vars->oparms.create_options = cifs_create_options(cifs_sb, create_options); |
| vars->oparms.fid = &fid; |
| vars->oparms.reconnect = false; |
| vars->oparms.mode = mode; |
| |
| rqst[num_rqst].rq_iov = &vars->open_iov[0]; |
| rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE; |
| rc = SMB2_open_init(tcon, server, |
| &rqst[num_rqst], &oplock, &vars->oparms, |
| utf16_path); |
| kfree(utf16_path); |
| if (rc) |
| goto finished; |
| |
| smb2_set_next_command(tcon, &rqst[num_rqst]); |
| after_open: |
| num_rqst++; |
| rc = 0; |
| |
| /* Operation */ |
| switch (command) { |
| case SMB2_OP_QUERY_INFO: |
| rqst[num_rqst].rq_iov = &vars->qi_iov[0]; |
| rqst[num_rqst].rq_nvec = 1; |
| |
| if (cfile) |
| rc = SMB2_query_info_init(tcon, server, |
| &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, server, |
| &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; |
| num_rqst++; |
| trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid, |
| full_path); |
| break; |
| case SMB2_OP_DELETE: |
| trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path); |
| break; |
| case SMB2_OP_MKDIR: |
| /* |
| * Directories are created through parameters in the |
| * SMB2_open() call. |
| */ |
| trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path); |
| break; |
| case SMB2_OP_RMDIR: |
| rqst[num_rqst].rq_iov = &vars->si_iov[0]; |
| rqst[num_rqst].rq_nvec = 1; |
| |
| size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */ |
| data[0] = &delete_pending[0]; |
| |
| rc = SMB2_set_info_init(tcon, server, |
| &rqst[num_rqst], COMPOUND_FID, |
| COMPOUND_FID, current->tgid, |
| FILE_DISPOSITION_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| if (rc) |
| goto finished; |
| smb2_set_next_command(tcon, &rqst[num_rqst]); |
| smb2_set_related(&rqst[num_rqst++]); |
| trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path); |
| break; |
| case SMB2_OP_SET_EOF: |
| rqst[num_rqst].rq_iov = &vars->si_iov[0]; |
| rqst[num_rqst].rq_nvec = 1; |
| |
| size[0] = 8; /* sizeof __le64 */ |
| data[0] = ptr; |
| |
| rc = SMB2_set_info_init(tcon, server, |
| &rqst[num_rqst], COMPOUND_FID, |
| COMPOUND_FID, current->tgid, |
| FILE_END_OF_FILE_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| if (rc) |
| goto finished; |
| smb2_set_next_command(tcon, &rqst[num_rqst]); |
| smb2_set_related(&rqst[num_rqst++]); |
| trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path); |
| break; |
| case SMB2_OP_SET_INFO: |
| rqst[num_rqst].rq_iov = &vars->si_iov[0]; |
| rqst[num_rqst].rq_nvec = 1; |
| |
| |
| size[0] = sizeof(FILE_BASIC_INFO); |
| data[0] = ptr; |
| |
| if (cfile) |
| rc = SMB2_set_info_init(tcon, server, |
| &rqst[num_rqst], |
| cfile->fid.persistent_fid, |
| cfile->fid.volatile_fid, current->tgid, |
| FILE_BASIC_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| else { |
| rc = SMB2_set_info_init(tcon, server, |
| &rqst[num_rqst], |
| COMPOUND_FID, |
| COMPOUND_FID, current->tgid, |
| FILE_BASIC_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| if (!rc) { |
| smb2_set_next_command(tcon, &rqst[num_rqst]); |
| smb2_set_related(&rqst[num_rqst]); |
| } |
| } |
| |
| if (rc) |
| goto finished; |
| num_rqst++; |
| trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid, |
| full_path); |
| break; |
| case SMB2_OP_RENAME: |
| rqst[num_rqst].rq_iov = &vars->si_iov[0]; |
| rqst[num_rqst].rq_nvec = 2; |
| |
| len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX)); |
| |
| vars->rename_info.ReplaceIfExists = 1; |
| vars->rename_info.RootDirectory = 0; |
| vars->rename_info.FileNameLength = cpu_to_le32(len); |
| |
| size[0] = sizeof(struct smb2_file_rename_info); |
| data[0] = &vars->rename_info; |
| |
| size[1] = len + 2 /* null */; |
| data[1] = (__le16 *)ptr; |
| |
| if (cfile) |
| rc = SMB2_set_info_init(tcon, server, |
| &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, server, |
| &rqst[num_rqst], |
| COMPOUND_FID, COMPOUND_FID, |
| current->tgid, FILE_RENAME_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| if (!rc) { |
| smb2_set_next_command(tcon, &rqst[num_rqst]); |
| smb2_set_related(&rqst[num_rqst]); |
| } |
| } |
| if (rc) |
| goto finished; |
| num_rqst++; |
| trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path); |
| break; |
| case SMB2_OP_HARDLINK: |
| rqst[num_rqst].rq_iov = &vars->si_iov[0]; |
| rqst[num_rqst].rq_nvec = 2; |
| |
| len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX)); |
| |
| vars->link_info.ReplaceIfExists = 0; |
| vars->link_info.RootDirectory = 0; |
| vars->link_info.FileNameLength = cpu_to_le32(len); |
| |
| size[0] = sizeof(struct smb2_file_link_info); |
| data[0] = &vars->link_info; |
| |
| size[1] = len + 2 /* null */; |
| data[1] = (__le16 *)ptr; |
| |
| rc = SMB2_set_info_init(tcon, server, |
| &rqst[num_rqst], COMPOUND_FID, |
| COMPOUND_FID, current->tgid, |
| FILE_LINK_INFORMATION, |
| SMB2_O_INFO_FILE, 0, data, size); |
| if (rc) |
| goto finished; |
| smb2_set_next_command(tcon, &rqst[num_rqst]); |
| smb2_set_related(&rqst[num_rqst++]); |
| trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path); |
| break; |
| default: |
| cifs_dbg(VFS, "Invalid command\n"); |
| rc = -EINVAL; |
| } |
| if (rc) |
| goto finished; |
| |
| /* We already have a handle so we can skip the close */ |
| if (cfile) |
| goto after_close; |
| /* Close */ |
| rqst[num_rqst].rq_iov = &vars->close_iov[0]; |
| rqst[num_rqst].rq_nvec = 1; |
| rc = SMB2_close_init(tcon, server, |
| &rqst[num_rqst], COMPOUND_FID, |
| COMPOUND_FID, false); |
| smb2_set_related(&rqst[num_rqst]); |
| if (rc) |
| goto finished; |
| after_close: |
| num_rqst++; |
| |
| if (cfile) { |
| cifsFileInfo_put(cfile); |
| cfile = NULL; |
| rc = compound_send_recv(xid, ses, server, |
| flags, num_rqst - 2, |
| &rqst[1], &resp_buftype[1], |
| &rsp_iov[1]); |
| } else |
| rc = compound_send_recv(xid, ses, server, |
| flags, num_rqst, |
| rqst, resp_buftype, |
| rsp_iov); |
| |
| finished: |
| if (cfile) |
| cifsFileInfo_put(cfile); |
| |
| SMB2_open_free(&rqst[0]); |
| if (rc == -EREMCHG) { |
| pr_warn_once("server share %s deleted\n", tcon->treeName); |
| tcon->need_reconnect = true; |
| } |
| |
| switch (command) { |
| case SMB2_OP_QUERY_INFO: |
| if (rc == 0) { |
| qi_rsp = (struct smb2_query_info_rsp *) |
| rsp_iov[1].iov_base; |
| rc = smb2_validate_and_copy_iov( |
| le16_to_cpu(qi_rsp->OutputBufferOffset), |
| le32_to_cpu(qi_rsp->OutputBufferLength), |
| &rsp_iov[1], sizeof(struct smb2_file_all_info), |
| ptr); |
| } |
| if (rqst[1].rq_iov) |
| SMB2_query_info_free(&rqst[1]); |
| if (rqst[2].rq_iov) |
| SMB2_close_free(&rqst[2]); |
| if (rc) |
| trace_smb3_query_info_compound_err(xid, ses->Suid, |
| tcon->tid, rc); |
| else |
| trace_smb3_query_info_compound_done(xid, ses->Suid, |
| tcon->tid); |
| break; |
| case SMB2_OP_DELETE: |
| if (rc) |
| trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc); |
| else |
| trace_smb3_delete_done(xid, ses->Suid, tcon->tid); |
| if (rqst[1].rq_iov) |
| SMB2_close_free(&rqst[1]); |
| break; |
| case SMB2_OP_MKDIR: |
| if (rc) |
| trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc); |
| else |
| trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid); |
| if (rqst[1].rq_iov) |
| SMB2_close_free(&rqst[1]); |
| break; |
| case SMB2_OP_HARDLINK: |
| if (rc) |
| trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc); |
| else |
| trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid); |
| free_set_inf_compound(rqst); |
| break; |
| case SMB2_OP_RENAME: |
| if (rc) |
| trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc); |
| else |
| trace_smb3_rename_done(xid, ses->Suid, tcon->tid); |
| free_set_inf_compound(rqst); |
| break; |
| case SMB2_OP_RMDIR: |
| if (rc) |
| trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc); |
| else |
| trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid); |
| free_set_inf_compound(rqst); |
| break; |
| case SMB2_OP_SET_EOF: |
| if (rc) |
| trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc); |
| else |
| trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid); |
| free_set_inf_compound(rqst); |
| break; |
| case SMB2_OP_SET_INFO: |
| if (rc) |
| trace_smb3_set_info_compound_err(xid, ses->Suid, |
| tcon->tid, rc); |
| else |
| trace_smb3_set_info_compound_done(xid, ses->Suid, |
| tcon->tid); |
| free_set_inf_compound(rqst); |
| break; |
| } |
| free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); |
| free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); |
| free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); |
| kfree(vars); |
| return rc; |
| } |
| |
| void |
| move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src) |
| { |
| memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src); |
| dst->CurrentByteOffset = src->CurrentByteOffset; |
| dst->Mode = src->Mode; |
| dst->AlignmentRequirement = src->AlignmentRequirement; |
| dst->IndexNumber1 = 0; /* we don't use it */ |
| } |
| |
| int |
| smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifs_sb_info *cifs_sb, const char *full_path, |
| FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink) |
| { |
| int rc; |
| struct smb2_file_all_info *smb2_data; |
| __u32 create_options = 0; |
| struct cifs_fid fid; |
| bool no_cached_open = tcon->nohandlecache; |
| struct cifsFileInfo *cfile; |
| |
| *adjust_tz = false; |
| *symlink = false; |
| |
| smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2, |
| GFP_KERNEL); |
| if (smb2_data == NULL) |
| return -ENOMEM; |
| |
| /* If it is a root and its handle is cached then use it */ |
| if (!strlen(full_path) && !no_cached_open) { |
| rc = open_shroot(xid, tcon, cifs_sb, &fid); |
| if (rc) |
| goto out; |
| |
| if (tcon->crfid.file_all_info_is_valid) { |
| move_smb2_info_to_cifs(data, |
| &tcon->crfid.file_all_info); |
| } else { |
| rc = SMB2_query_info(xid, tcon, fid.persistent_fid, |
| fid.volatile_fid, smb2_data); |
| if (!rc) |
| move_smb2_info_to_cifs(data, smb2_data); |
| } |
| close_shroot(&tcon->crfid); |
| goto out; |
| } |
| |
| 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, |
| ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile); |
| if (rc == -EOPNOTSUPP) { |
| *symlink = true; |
| create_options |= OPEN_REPARSE_POINT; |
| |
| /* Failed on a symbolic link - query a reparse point info */ |
| rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, |
| FILE_READ_ATTRIBUTES, FILE_OPEN, |
| create_options, ACL_NO_MODE, |
| smb2_data, SMB2_OP_QUERY_INFO, NULL); |
| } |
| if (rc) |
| goto out; |
| |
| move_smb2_info_to_cifs(data, smb2_data); |
| out: |
| kfree(smb2_data); |
| return rc; |
| } |
| |
| int |
| smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, |
| struct cifs_tcon *tcon, const char *name, |
| struct cifs_sb_info *cifs_sb) |
| { |
| return smb2_compound_op(xid, tcon, cifs_sb, name, |
| FILE_WRITE_ATTRIBUTES, FILE_CREATE, |
| CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR, |
| NULL); |
| } |
| |
| void |
| smb2_mkdir_setinfo(struct inode *inode, const char *name, |
| struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, |
| const unsigned int xid) |
| { |
| FILE_BASIC_INFO data; |
| struct cifsInodeInfo *cifs_i; |
| struct cifsFileInfo *cfile; |
| u32 dosattrs; |
| int tmprc; |
| |
| memset(&data, 0, sizeof(data)); |
| cifs_i = CIFS_I(inode); |
| dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; |
| data.Attributes = cpu_to_le32(dosattrs); |
| cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile); |
| tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, |
| FILE_WRITE_ATTRIBUTES, FILE_CREATE, |
| CREATE_NOT_FILE, ACL_NO_MODE, |
| &data, SMB2_OP_SET_INFO, cfile); |
| if (tmprc == 0) |
| cifs_i->cifsAttrs = dosattrs; |
| } |
| |
| int |
| smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, |
| struct cifs_sb_info *cifs_sb) |
| { |
| return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, |
| CREATE_NOT_FILE, ACL_NO_MODE, |
| NULL, SMB2_OP_RMDIR, NULL); |
| } |
| |
| int |
| smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, |
| struct cifs_sb_info *cifs_sb) |
| { |
| return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, |
| CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, |
| ACL_NO_MODE, 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 cifsFileInfo *cfile) |
| { |
| __le16 *smb2_to_name = NULL; |
| int rc; |
| |
| smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); |
| if (smb2_to_name == NULL) { |
| rc = -ENOMEM; |
| goto smb2_rename_path; |
| } |
| rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access, |
| FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name, |
| command, cfile); |
| smb2_rename_path: |
| kfree(smb2_to_name); |
| return rc; |
| } |
| |
| int |
| 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) |
| { |
| struct cifsFileInfo *cfile; |
| |
| cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile); |
| |
| return smb2_set_path_attr(xid, tcon, from_name, to_name, |
| cifs_sb, DELETE, SMB2_OP_RENAME, cfile); |
| } |
| |
| int |
| smb2_create_hardlink(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, |
| FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK, |
| NULL); |
| } |
| |
| int |
| smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, |
| const char *full_path, __u64 size, |
| struct cifs_sb_info *cifs_sb, bool set_alloc) |
| { |
| __le64 eof = cpu_to_le64(size); |
| |
| return smb2_compound_op(xid, tcon, cifs_sb, full_path, |
| FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE, |
| &eof, SMB2_OP_SET_EOF, NULL); |
| } |
| |
| int |
| smb2_set_file_info(struct inode *inode, const char *full_path, |
| FILE_BASIC_INFO *buf, const unsigned int xid) |
| { |
| struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| struct tcon_link *tlink; |
| int rc; |
| |
| if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && |
| (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) && |
| (buf->Attributes == 0)) |
| return 0; /* would be a no op, no sense sending this */ |
| |
| tlink = cifs_sb_tlink(cifs_sb); |
| if (IS_ERR(tlink)) |
| return PTR_ERR(tlink); |
| |
| rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path, |
| FILE_WRITE_ATTRIBUTES, FILE_OPEN, |
| 0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL); |
| cifs_put_tlink(tlink); |
| return rc; |
| } |