On Thu, 10 May 2012 00:38:24 -0500
shirishpargaonkar@xxxxxxxxx wrote:
> From: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
>
>
> As observed and suggested by Tushar Gosavi...
>
> ---------
> readdir calls these function to send TRANS2_FIND_FIRST and
> TRANS2_FIND_NEXT command to the server. The current cifs module is
> not specifying CIFS_SEARCH_BACKUP_SEARCH flag while sending these
> command when backupuid/backupgid is specified. This can be resolved
> by specifying CIFS_SEARCH_BACKUP_SEARCH flag.
> ---------
>
>
> Reported-by: Tushar Gosavi <tugosavi@xxxxxxxxxx>
> Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
> ---
> fs/cifs/cifsproto.h | 6 ++++--
> fs/cifs/cifssmb.c | 10 ++++------
> fs/cifs/readdir.c | 15 +++++++++++++--
> 3 files changed, 21 insertions(+), 10 deletions(-)
>
> diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
> index 96192c1..97f5d03 100644
> --- a/fs/cifs/cifsproto.h
> +++ b/fs/cifs/cifsproto.h
> @@ -192,11 +192,13 @@ extern int CIFSTCon(unsigned int xid, struct cifs_ses *ses,
>
> extern int CIFSFindFirst(const int xid, struct cifs_tcon *tcon,
> const char *searchName, const struct nls_table *nls_codepage,
> - __u16 *searchHandle, struct cifs_search_info *psrch_inf,
> + __u16 *searchHandle, __u16 search_flags,
> + struct cifs_search_info *psrch_inf,
> int map, const char dirsep);
>
> extern int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
> - __u16 searchHandle, struct cifs_search_info *psrch_inf);
> + __u16 searchHandle, __u16 search_flags,
> + struct cifs_search_info *psrch_inf);
>
> extern int CIFSFindClose(const int, struct cifs_tcon *tcon,
> const __u16 search_handle);
> diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
> index da2f544..17c310a 100644
> --- a/fs/cifs/cifssmb.c
> +++ b/fs/cifs/cifssmb.c
> @@ -4344,7 +4344,7 @@ int
> CIFSFindFirst(const int xid, struct cifs_tcon *tcon,
> const char *searchName,
> const struct nls_table *nls_codepage,
> - __u16 *pnetfid,
> + __u16 *pnetfid, __u16 search_flags,
> struct cifs_search_info *psrch_inf, int remap, const char dirsep)
> {
> /* level 257 SMB_ */
> @@ -4416,8 +4416,7 @@ findFirstRetry:
> cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
> ATTR_DIRECTORY);
> pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO));
> - pSMB->SearchFlags = cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END |
> - CIFS_SEARCH_RETURN_RESUME);
> + pSMB->SearchFlags = cpu_to_le16(search_flags);
> pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
>
> /* BB what should we set StorageType to? Does it matter? BB */
> @@ -4487,7 +4486,7 @@ findFirstRetry:
> return rc;
> }
>
> -int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
> +int CIFSFindNext(const int xid, struct cifs_tcon *tcon, __u16 search_flags,
> __u16 searchHandle, struct cifs_search_info *psrch_inf)
> {
> TRANSACTION2_FNEXT_REQ *pSMB = NULL;
> @@ -4531,8 +4530,7 @@ int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
> cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
> pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
> pSMB->ResumeKey = psrch_inf->resume_key;
> - pSMB->SearchFlags =
> - cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME);
> + pSMB->SearchFlags = cpu_to_le16(search_flags);
>
> name_len = psrch_inf->resume_name_len;
> params += name_len;
> diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
> index e2bbc68..297e432 100644
> --- a/fs/cifs/readdir.c
> +++ b/fs/cifs/readdir.c
> @@ -219,6 +219,7 @@ int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
>
> static int initiate_cifs_search(const int xid, struct file *file)
> {
> + __u16 search_flags = 0;
> int rc = 0;
> char *full_path = NULL;
> struct cifsFileInfo *cifsFile;
> @@ -270,8 +271,12 @@ ffirst_retry:
> cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
> }
>
> + search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
> + if (backup_cred(cifs_sb))
> + search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
> +
> rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
> - &cifsFile->netfid, &cifsFile->srch_inf,
> + &cifsFile->netfid, search_flags, &cifsFile->srch_inf,
> cifs_sb->mnt_cifs_flags &
> CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
> if (rc == 0)
> @@ -502,11 +507,13 @@ static int cifs_save_resume_key(const char *current_entry,
> static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
> struct file *file, char **ppCurrentEntry, int *num_to_ret)
> {
> + __u16 search_flags = 0;
> int rc = 0;
> int pos_in_buf = 0;
> loff_t first_entry_in_buffer;
> loff_t index_to_find = file->f_pos;
> struct cifsFileInfo *cifsFile = file->private_data;
> + struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
> /* check if index in the buffer */
>
> if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
> @@ -560,10 +567,14 @@ static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
> cifsFile);
> }
>
> + search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
> + if (backup_cred(cifs_sb))
> + search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
> +
> while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
> (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
> cFYI(1, "calling findnext2");
> - rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
> + rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, search_flags,
> &cifsFile->srch_inf);
> /* FindFirst/Next set last_entry to NULL on malformed reply */
> if (cifsFile->srch_inf.last_entry)
Looks reasonably straightforward...
Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
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