From 0b8f18e358384a52c1ed7fa7129c08e7eaf86bb6 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Thu, 9 Jul 2009 01:46:37 -0400 Subject: cifs: convert cifs_get_inode_info and non-posix readdir to use cifs_iget cifs: convert cifs_get_inode_info and non-posix readdir to use cifs_iget Rather than allocating an inode and filling it out, have cifs_get_inode_info fill out a cifs_fattr and call cifs_iget. This means a pretty hefty reorganization of cifs_get_inode_info. For the readdir codepath, add a couple of new functions for filling out cifs_fattr's from different FindFile response infolevels. Finally, remove cifs_new_inode since there are no more callers. Signed-off-by: Jeff Layton Reviewed-by: Christoph Hellwig Signed-off-by: Steve French --- fs/cifs/readdir.c | 350 +++++++++++++----------------------------------------- 1 file changed, 83 insertions(+), 267 deletions(-) (limited to 'fs/cifs/readdir.c') diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 231aa6953f83..f823a4a208a7 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -112,239 +112,74 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name, return dentry; } -/* Returns 1 if new inode created, 2 if both dentry and inode were */ -/* Might check in the future if inode number changed so we can rehash inode */ -static int -construct_dentry(struct qstr *qstring, struct file *file, - struct inode **ptmp_inode, struct dentry **pnew_dentry, - __u64 *inum) +static void +cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) { - struct dentry *tmp_dentry = NULL; - struct super_block *sb = file->f_path.dentry->d_sb; - int rc = 0; + fattr->cf_uid = cifs_sb->mnt_uid; + fattr->cf_gid = cifs_sb->mnt_gid; - cFYI(1, ("For %s", qstring->name)); - - tmp_dentry = d_lookup(file->f_path.dentry, qstring); - if (tmp_dentry) { - /* BB: overwrite old name? i.e. tmp_dentry->d_name and - * tmp_dentry->d_name.len?? - */ - cFYI(0, ("existing dentry with inode 0x%p", - tmp_dentry->d_inode)); - *ptmp_inode = tmp_dentry->d_inode; - if (*ptmp_inode == NULL) { - *ptmp_inode = cifs_new_inode(sb, inum); - if (*ptmp_inode == NULL) - return rc; - rc = 1; - } + if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { + fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; + fattr->cf_dtype = DT_DIR; } else { - tmp_dentry = d_alloc(file->f_path.dentry, qstring); - if (tmp_dentry == NULL) { - cERROR(1, ("Failed allocating dentry")); - *ptmp_inode = NULL; - return rc; - } - - if (CIFS_SB(sb)->tcon->nocase) - tmp_dentry->d_op = &cifs_ci_dentry_ops; - else - tmp_dentry->d_op = &cifs_dentry_ops; - - *ptmp_inode = cifs_new_inode(sb, inum); - if (*ptmp_inode == NULL) - return rc; - rc = 2; - } - - tmp_dentry->d_time = jiffies; - *pnew_dentry = tmp_dentry; - return rc; -} - -static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, - char *buf, unsigned int *pobject_type, int isNewInode) -{ - loff_t local_size; - struct timespec local_mtime; - - struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); - struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); - __u32 attr; - __u64 allocation_size; - __u64 end_of_file; - umode_t default_mode; - - /* save mtime and size */ - local_mtime = tmp_inode->i_mtime; - local_size = tmp_inode->i_size; - - if (new_buf_type) { - FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; - - attr = le32_to_cpu(pfindData->ExtFileAttributes); - allocation_size = le64_to_cpu(pfindData->AllocationSize); - end_of_file = le64_to_cpu(pfindData->EndOfFile); - tmp_inode->i_atime = - cifs_NTtimeToUnix(pfindData->LastAccessTime); - tmp_inode->i_mtime = - cifs_NTtimeToUnix(pfindData->LastWriteTime); - tmp_inode->i_ctime = - cifs_NTtimeToUnix(pfindData->ChangeTime); - } else { /* legacy, OS2 and DOS style */ - int offset = cifs_sb->tcon->ses->server->timeAdj; - FIND_FILE_STANDARD_INFO *pfindData = - (FIND_FILE_STANDARD_INFO *)buf; - - tmp_inode->i_mtime = cnvrtDosUnixTm(pfindData->LastWriteDate, - pfindData->LastWriteTime, - offset); - tmp_inode->i_atime = cnvrtDosUnixTm(pfindData->LastAccessDate, - pfindData->LastAccessTime, - offset); - tmp_inode->i_ctime = cnvrtDosUnixTm(pfindData->LastWriteDate, - pfindData->LastWriteTime, - offset); - attr = le16_to_cpu(pfindData->Attributes); - allocation_size = le32_to_cpu(pfindData->AllocationSize); - end_of_file = le32_to_cpu(pfindData->DataSize); - } - - /* Linux can not store file creation time unfortunately so ignore it */ - - cifsInfo->cifsAttrs = attr; -#ifdef CONFIG_CIFS_EXPERIMENTAL - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { - /* get more accurate mode via ACL - so force inode refresh */ - cifsInfo->time = 0; - } else -#endif /* CONFIG_CIFS_EXPERIMENTAL */ - cifsInfo->time = jiffies; - - /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ - /* 2767 perms - indicate mandatory locking */ - /* BB fill in uid and gid here? with help from winbind? - or retrieve from NTFS stream extended attribute */ - if (atomic_read(&cifsInfo->inUse) == 0) { - tmp_inode->i_uid = cifs_sb->mnt_uid; - tmp_inode->i_gid = cifs_sb->mnt_gid; + fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; + fattr->cf_dtype = DT_REG; } - if (attr & ATTR_DIRECTORY) - default_mode = cifs_sb->mnt_dir_mode; - else - default_mode = cifs_sb->mnt_file_mode; - - /* set initial permissions */ - if ((atomic_read(&cifsInfo->inUse) == 0) || - (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) - tmp_inode->i_mode = default_mode; - else { - /* just reenable write bits if !ATTR_READONLY */ - if ((tmp_inode->i_mode & S_IWUGO) == 0 && - (attr & ATTR_READONLY) == 0) - tmp_inode->i_mode |= (S_IWUGO & default_mode); - - tmp_inode->i_mode &= ~S_IFMT; - } - - /* clear write bits if ATTR_READONLY is set */ - if (attr & ATTR_READONLY) - tmp_inode->i_mode &= ~S_IWUGO; + if (fattr->cf_cifsattrs & ATTR_READONLY) + fattr->cf_mode &= ~S_IWUGO; - /* set inode type */ - if ((attr & ATTR_SYSTEM) && - (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { - if (end_of_file == 0) { - tmp_inode->i_mode |= S_IFIFO; - *pobject_type = DT_FIFO; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && + fattr->cf_cifsattrs & ATTR_SYSTEM) { + if (fattr->cf_eof == 0) { + fattr->cf_mode &= ~S_IFMT; + fattr->cf_mode |= S_IFIFO; + fattr->cf_dtype = DT_FIFO; } else { /* - * trying to get the type can be slow, so just call - * this a regular file for now, and mark for reval + * trying to get the type and mode via SFU can be slow, + * so just call those regular files for now, and mark + * for reval */ - tmp_inode->i_mode |= S_IFREG; - *pobject_type = DT_REG; - cifsInfo->time = 0; - } - } else { - if (attr & ATTR_DIRECTORY) { - tmp_inode->i_mode |= S_IFDIR; - *pobject_type = DT_DIR; - } else { - tmp_inode->i_mode |= S_IFREG; - *pobject_type = DT_REG; + fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; } } +} - /* can not fill in nlink here as in qpathinfo version and Unx search */ - if (atomic_read(&cifsInfo->inUse) == 0) - atomic_set(&cifsInfo->inUse, 1); +void +cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, + struct cifs_sb_info *cifs_sb) +{ + memset(fattr, 0, sizeof(*fattr)); + fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes); + fattr->cf_eof = le64_to_cpu(info->EndOfFile); + fattr->cf_bytes = le64_to_cpu(info->AllocationSize); + fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); + fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); + fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); + + cifs_fill_common_info(fattr, cifs_sb); +} - cifsInfo->server_eof = end_of_file; - spin_lock(&tmp_inode->i_lock); - if (is_size_safe_to_change(cifsInfo, end_of_file)) { - /* can not safely change the file size here if the - client is writing to it due to potential races */ - i_size_write(tmp_inode, end_of_file); +void +cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info, + struct cifs_sb_info *cifs_sb) +{ + int offset = cifs_sb->tcon->ses->server->timeAdj; - /* 512 bytes (2**9) is the fake blocksize that must be used */ - /* for this calculation, even though the reported blocksize is larger */ - tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; - } - spin_unlock(&tmp_inode->i_lock); - - if (allocation_size < end_of_file) - cFYI(1, ("May be sparse file, allocation less than file size")); - cFYI(1, ("File Size %ld and blocks %llu", - (unsigned long)tmp_inode->i_size, - (unsigned long long)tmp_inode->i_blocks)); - if (S_ISREG(tmp_inode->i_mode)) { - cFYI(1, ("File inode")); - tmp_inode->i_op = &cifs_file_inode_ops; - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) - tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; - else - tmp_inode->i_fop = &cifs_file_direct_ops; - } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) - tmp_inode->i_fop = &cifs_file_nobrl_ops; - else - tmp_inode->i_fop = &cifs_file_ops; - - if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && - (cifs_sb->tcon->ses->server->maxBuf < - PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) - tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; - else - tmp_inode->i_data.a_ops = &cifs_addr_ops; - - if (isNewInode) - return; /* No sense invalidating pages for new inode - since have not started caching readahead file - data yet */ - - if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && - (local_size == tmp_inode->i_size)) { - cFYI(1, ("inode exists but unchanged")); - } else { - /* file may have changed on server */ - cFYI(1, ("invalidate inode, readdir detected change")); - invalidate_remote_inode(tmp_inode); - } - } else if (S_ISDIR(tmp_inode->i_mode)) { - cFYI(1, ("Directory inode")); - tmp_inode->i_op = &cifs_dir_inode_ops; - tmp_inode->i_fop = &cifs_dir_ops; - } else if (S_ISLNK(tmp_inode->i_mode)) { - cFYI(1, ("Symbolic Link inode")); - tmp_inode->i_op = &cifs_symlink_inode_ops; - } else { - cFYI(1, ("Init special inode")); - init_special_inode(tmp_inode, tmp_inode->i_mode, - tmp_inode->i_rdev); - } + memset(fattr, 0, sizeof(*fattr)); + fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate, + info->LastAccessTime, offset); + fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate, + info->LastWriteTime, offset); + fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate, + info->LastWriteTime, offset); + + fattr->cf_cifsattrs = le16_to_cpu(info->Attributes); + fattr->cf_bytes = le32_to_cpu(info->AllocationSize); + fattr->cf_eof = le32_to_cpu(info->DataSize); + + cifs_fill_common_info(fattr, cifs_sb); } /* BB eventually need to add the following helper function to @@ -846,11 +681,10 @@ static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, int rc = 0; struct qstr qstring; struct cifsFileInfo *pCifsF; - unsigned int obj_type; - __u64 inum; + u64 inum; ino_t ino; + struct super_block *sb; struct cifs_sb_info *cifs_sb; - struct inode *tmp_inode; struct dentry *tmp_dentry; struct cifs_fattr fattr; @@ -870,71 +704,53 @@ static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, if (rc != 0) return 0; - cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); + sb = file->f_path.dentry->d_sb; + cifs_sb = CIFS_SB(sb); qstring.name = scratch_buf; rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, pCifsF->srch_inf.info_level, pCifsF->srch_inf.unicode, cifs_sb, - max_len, - &inum /* returned */); + max_len, &inum /* returned */); if (rc) return rc; - /* only these two infolevels return valid inode numbers */ - if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) { + if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) cifs_unix_basic_to_fattr(&fattr, &((FILE_UNIX_INFO *) pfindEntry)->basic, cifs_sb); - tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, - &fattr); - obj_type = fattr.cf_dtype; - ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); - } else { - if (pCifsF->srch_inf.info_level == - SMB_FIND_FILE_ID_FULL_DIR_INFO) - rc = construct_dentry(&qstring, file, &tmp_inode, - &tmp_dentry, &inum); - else - rc = construct_dentry(&qstring, file, &tmp_inode, - &tmp_dentry, NULL); - - if ((tmp_inode == NULL) || (tmp_dentry == NULL)) { - rc = -ENOMEM; - goto out; - } - - /* we pass in rc below, indicating whether it is a new inode, - * so we can figure out whether to invalidate the inode cached - * data if the file has changed - */ - if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) - fill_in_inode(tmp_inode, 0, pfindEntry, &obj_type, rc); - else - fill_in_inode(tmp_inode, 1, pfindEntry, &obj_type, rc); + else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) + cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *) + pfindEntry, cifs_sb); + else + cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *) + pfindEntry, cifs_sb); - /* new inode - needs to be tied to dentry */ - if (rc) { - d_instantiate(tmp_dentry, tmp_inode); - if (rc == 2) - d_rehash(tmp_dentry); - } + /* FIXME: make _to_fattr functions fill this out */ + if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO) + fattr.cf_uniqueid = inum; + else + fattr.cf_uniqueid = iunique(sb, ROOT_I); - ino = cifs_uniqueid_to_ino_t(tmp_inode->i_ino); - } + ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); + tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr); rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, - ino, obj_type); + ino, fattr.cf_dtype); + + /* + * we can not return filldir errors to the caller since they are + * "normal" when the stat blocksize is too small - we return remapped + * error instead + * + * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above + * case already. Why should we be clobbering other errors from it? + */ if (rc) { cFYI(1, ("filldir rc = %d", rc)); - /* we can not return filldir errors to the caller - since they are "normal" when the stat blocksize - is too small - we return remapped error instead */ rc = -EOVERFLOW; } - -out: dput(tmp_dentry); return rc; } -- cgit v1.2.2