diff options
Diffstat (limited to 'fs/cifs/readdir.c')
| -rw-r--r-- | fs/cifs/readdir.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index a1e8dc901de4..a86bd1c07602 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -396,7 +396,8 @@ ffirst_retry: rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, &cifsFile->netfid, &cifsFile->srch_inf, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); if(rc == 0) cifsFile->invalidHandle = FALSE; if((rc == -EOPNOTSUPP) && @@ -513,6 +514,30 @@ static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) return rc; } +/* Check if directory that we are searching has changed so we can decide + whether we can use the cached search results from the previous search */ +static int is_dir_changed(struct file * file) +{ + struct inode * inode; + struct cifsInodeInfo *cifsInfo; + + if(file->f_dentry == NULL) + return 0; + + inode = file->f_dentry->d_inode; + + if(inode == NULL) + return 0; + + cifsInfo = CIFS_I(inode); + + if(cifsInfo->time == 0) + return 1; /* directory was changed, perhaps due to unlink */ + else + return 0; + +} + /* find the corresponding entry in the search */ /* Note that the SMB server returns search entries for . and .. which complicates logic here if we choose to parse for them and we do not @@ -529,7 +554,8 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, struct cifsFileInfo * cifsFile = file->private_data; /* check if index in the buffer */ - if((cifsFile == NULL) || (ppCurrentEntry == NULL) || (num_to_ret == NULL)) + if((cifsFile == NULL) || (ppCurrentEntry == NULL) || + (num_to_ret == NULL)) return -ENOENT; *ppCurrentEntry = NULL; @@ -537,7 +563,9 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, cifsFile->srch_inf.index_of_last_entry - cifsFile->srch_inf.entries_in_buffer; /* dump_cifs_file_struct(file, "In fce ");*/ - if(index_to_find < first_entry_in_buffer) { + if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && + is_dir_changed(file)) || + (index_to_find < first_entry_in_buffer)) { /* close and restart search */ cFYI(1,("search backing up - close and restart search")); cifsFile->invalidHandle = TRUE; @@ -604,7 +632,7 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, } if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { - cFYI(1,("can not return entries when pos_in_buf beyond last entry")); + cFYI(1,("can not return entries pos_in_buf beyond last entry")); *num_to_ret = 0; } else *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; @@ -833,7 +861,6 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) if(pTcon == NULL) return -EINVAL; - switch ((int) file->f_pos) { case 0: /*if (filldir(direntry, ".", 1, file->f_pos, |