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    Subject[PATCH 5/8] exofs: dir_inode and directory operations
    Date
    implementation of directory and inode operations.

    * A directory is treated as a file, and essentially contains a list
    of <file name, inode #> pairs for files that are found in that
    directory. The object IDs correspond to the files' inode numbers
    and are allocated using a 64bit incrementing global counter.
    * Each file's control block (AKA on-disk inode) is stored in its
    object's attributes. This applies to both regular files and other
    types (directories, device files, symlinks, etc.).

    Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
    ---
    fs/exofs/Kbuild | 2 +-
    fs/exofs/dir.c | 643 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
    fs/exofs/exofs.h | 26 +++
    fs/exofs/inode.c | 272 +++++++++++++++++++++++
    fs/exofs/namei.c | 338 ++++++++++++++++++++++++++++
    5 files changed, 1280 insertions(+), 1 deletions(-)
    create mode 100644 fs/exofs/dir.c
    create mode 100644 fs/exofs/namei.c

    diff --git a/fs/exofs/Kbuild b/fs/exofs/Kbuild
    index 18c6158..61162c6 100644
    --- a/fs/exofs/Kbuild
    +++ b/fs/exofs/Kbuild
    @@ -26,5 +26,5 @@ KBUILD_CPPFLAGS := -I$(OSD_INC) $(KBUILD_CPPFLAGS)

    endif

    -exofs-objs := osd.o inode.o file.o symlink.o
    +exofs-objs := osd.o inode.o file.o symlink.o namei.o dir.o
    obj-$(CONFIG_EXOFS_FS) += exofs.o
    diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c
    new file mode 100644
    index 0000000..245fdee
    --- /dev/null
    +++ b/fs/exofs/dir.c
    @@ -0,0 +1,643 @@
    +/*
    + * Copyright (C) 2005, 2006
    + * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
    + * Copyright (C) 2005, 2006
    + * International Business Machines
    + * Copyright (C) 2008, 2009
    + * Boaz Harrosh <bharrosh@panasas.com>
    + *
    + * Copyrights for code taken from ext2:
    + * Copyright (C) 1992, 1993, 1994, 1995
    + * Remy Card (card@masi.ibp.fr)
    + * Laboratoire MASI - Institut Blaise Pascal
    + * Universite Pierre et Marie Curie (Paris VI)
    + * from
    + * linux/fs/minix/inode.c
    + * Copyright (C) 1991, 1992 Linus Torvalds
    + *
    + * This file is part of exofs.
    + *
    + * exofs is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation. Since it is based on ext2, and the only
    + * valid version of GPL for the Linux kernel is version 2, the only valid
    + * version of GPL for exofs is version 2.
    + *
    + * exofs 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 General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with exofs; if not, write to the Free Software
    + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + */
    +
    +#include "exofs.h"
    +
    +static inline unsigned exofs_chunk_size(struct inode *inode)
    +{
    + return inode->i_sb->s_blocksize;
    +}
    +
    +static inline void exofs_put_page(struct page *page)
    +{
    + kunmap(page);
    + page_cache_release(page);
    +}
    +
    +static inline unsigned long dir_pages(struct inode *inode)
    +{
    + return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
    +}
    +
    +static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr)
    +{
    + unsigned last_byte = inode->i_size;
    +
    + last_byte -= page_nr << PAGE_CACHE_SHIFT;
    + if (last_byte > PAGE_CACHE_SIZE)
    + last_byte = PAGE_CACHE_SIZE;
    + return last_byte;
    +}
    +
    +static int exofs_commit_chunk(struct page *page, loff_t pos, unsigned len)
    +{
    + struct address_space *mapping = page->mapping;
    + struct inode *dir = mapping->host;
    + int err = 0;
    +
    + dir->i_version++;
    +
    + if (!PageUptodate(page))
    + SetPageUptodate(page);
    +
    + if (pos+len > dir->i_size) {
    + i_size_write(dir, pos+len);
    + mark_inode_dirty(dir);
    + }
    + set_page_dirty(page);
    +
    + if (IS_DIRSYNC(dir))
    + err = write_one_page(page, 1);
    + else
    + unlock_page(page);
    +
    + return err;
    +}
    +
    +static void exofs_check_page(struct page *page)
    +{
    + struct inode *dir = page->mapping->host;
    + unsigned chunk_size = exofs_chunk_size(dir);
    + char *kaddr = page_address(page);
    + unsigned offs, rec_len;
    + unsigned limit = PAGE_CACHE_SIZE;
    + struct exofs_dir_entry *p;
    + char *error;
    +
    + /* if the page is the last one in the directory */
    + if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
    + limit = dir->i_size & ~PAGE_CACHE_MASK;
    + if (limit & (chunk_size - 1))
    + goto Ebadsize;
    + if (!limit)
    + goto out;
    + }
    + for (offs = 0; offs <= limit - EXOFS_DIR_REC_LEN(1); offs += rec_len) {
    + p = (struct exofs_dir_entry *)(kaddr + offs);
    + rec_len = le16_to_cpu(p->rec_len);
    +
    + if (rec_len < EXOFS_DIR_REC_LEN(1))
    + goto Eshort;
    + if (rec_len & 3)
    + goto Ealign;
    + if (rec_len < EXOFS_DIR_REC_LEN(p->name_len))
    + goto Enamelen;
    + if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
    + goto Espan;
    + }
    + if (offs != limit)
    + goto Eend;
    +out:
    + SetPageChecked(page);
    + return;
    +
    +Ebadsize:
    + EXOFS_ERR("ERROR [exofs_check_page]: "
    + "size of directory #%lu is not a multiple of chunk size",
    + dir->i_ino
    + );
    + goto fail;
    +Eshort:
    + error = "rec_len is smaller than minimal";
    + goto bad_entry;
    +Ealign:
    + error = "unaligned directory entry";
    + goto bad_entry;
    +Enamelen:
    + error = "rec_len is too small for name_len";
    + goto bad_entry;
    +Espan:
    + error = "directory entry across blocks";
    + goto bad_entry;
    +bad_entry:
    + EXOFS_ERR(
    + "ERROR [exofs_check_page]: bad entry in directory #%lu: %s - "
    + "offset=%lu, inode=%llu, rec_len=%d, name_len=%d",
    + dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,
    + _LLU(le64_to_cpu(p->inode_no)),
    + rec_len, p->name_len);
    + goto fail;
    +Eend:
    + p = (struct exofs_dir_entry *)(kaddr + offs);
    + EXOFS_ERR("ERROR [exofs_check_page]: "
    + "entry in directory #%lu spans the page boundary"
    + "offset=%lu, inode=%llu",
    + dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
    + _LLU(le64_to_cpu(p->inode_no)));
    +fail:
    + SetPageChecked(page);
    + SetPageError(page);
    +}
    +
    +static struct page *exofs_get_page(struct inode *dir, unsigned long n)
    +{
    + struct address_space *mapping = dir->i_mapping;
    + struct page *page = read_mapping_page(mapping, n, NULL);
    +
    + if (!IS_ERR(page)) {
    + kmap(page);
    + if (!PageChecked(page))
    + exofs_check_page(page);
    + if (PageError(page))
    + goto fail;
    + }
    + return page;
    +
    +fail:
    + exofs_put_page(page);
    + return ERR_PTR(-EIO);
    +}
    +
    +static inline int exofs_match(int len, const unsigned char *name,
    + struct exofs_dir_entry *de)
    +{
    + if (len != de->name_len)
    + return 0;
    + if (!de->inode_no)
    + return 0;
    + return !memcmp(name, de->name, len);
    +}
    +
    +static inline
    +struct exofs_dir_entry *exofs_next_entry(struct exofs_dir_entry *p)
    +{
    + return (struct exofs_dir_entry *)((char *)p + le16_to_cpu(p->rec_len));
    +}
    +
    +static inline unsigned
    +exofs_validate_entry(char *base, unsigned offset, unsigned mask)
    +{
    + struct exofs_dir_entry *de = (struct exofs_dir_entry *)(base + offset);
    + struct exofs_dir_entry *p =
    + (struct exofs_dir_entry *)(base + (offset&mask));
    + while ((char *)p < (char *)de) {
    + if (p->rec_len == 0)
    + break;
    + p = exofs_next_entry(p);
    + }
    + return (char *)p - base;
    +}
    +
    +static unsigned char exofs_filetype_table[EXOFS_FT_MAX] = {
    + [EXOFS_FT_UNKNOWN] = DT_UNKNOWN,
    + [EXOFS_FT_REG_FILE] = DT_REG,
    + [EXOFS_FT_DIR] = DT_DIR,
    + [EXOFS_FT_CHRDEV] = DT_CHR,
    + [EXOFS_FT_BLKDEV] = DT_BLK,
    + [EXOFS_FT_FIFO] = DT_FIFO,
    + [EXOFS_FT_SOCK] = DT_SOCK,
    + [EXOFS_FT_SYMLINK] = DT_LNK,
    +};
    +
    +#define S_SHIFT 12
    +static unsigned char exofs_type_by_mode[S_IFMT >> S_SHIFT] = {
    + [S_IFREG >> S_SHIFT] = EXOFS_FT_REG_FILE,
    + [S_IFDIR >> S_SHIFT] = EXOFS_FT_DIR,
    + [S_IFCHR >> S_SHIFT] = EXOFS_FT_CHRDEV,
    + [S_IFBLK >> S_SHIFT] = EXOFS_FT_BLKDEV,
    + [S_IFIFO >> S_SHIFT] = EXOFS_FT_FIFO,
    + [S_IFSOCK >> S_SHIFT] = EXOFS_FT_SOCK,
    + [S_IFLNK >> S_SHIFT] = EXOFS_FT_SYMLINK,
    +};
    +
    +static inline
    +void exofs_set_de_type(struct exofs_dir_entry *de, struct inode *inode)
    +{
    + mode_t mode = inode->i_mode;
    + de->file_type = exofs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
    +}
    +
    +static int
    +exofs_readdir(struct file *filp, void *dirent, filldir_t filldir)
    +{
    + loff_t pos = filp->f_pos;
    + struct inode *inode = filp->f_path.dentry->d_inode;
    + unsigned int offset = pos & ~PAGE_CACHE_MASK;
    + unsigned long n = pos >> PAGE_CACHE_SHIFT;
    + unsigned long npages = dir_pages(inode);
    + unsigned chunk_mask = ~(exofs_chunk_size(inode)-1);
    + unsigned char *types = NULL;
    + int need_revalidate = (filp->f_version != inode->i_version);
    +
    + if (pos > inode->i_size - EXOFS_DIR_REC_LEN(1))
    + return 0;
    +
    + types = exofs_filetype_table;
    +
    + for ( ; n < npages; n++, offset = 0) {
    + char *kaddr, *limit;
    + struct exofs_dir_entry *de;
    + struct page *page = exofs_get_page(inode, n);
    +
    + if (IS_ERR(page)) {
    + EXOFS_ERR("ERROR: "
    + "bad page in #%lu",
    + inode->i_ino);
    + filp->f_pos += PAGE_CACHE_SIZE - offset;
    + return PTR_ERR(page);
    + }
    + kaddr = page_address(page);
    + if (unlikely(need_revalidate)) {
    + if (offset) {
    + offset = exofs_validate_entry(kaddr, offset,
    + chunk_mask);
    + filp->f_pos = (n<<PAGE_CACHE_SHIFT) + offset;
    + }
    + filp->f_version = inode->i_version;
    + need_revalidate = 0;
    + }
    + de = (struct exofs_dir_entry *)(kaddr + offset);
    + limit = kaddr + exofs_last_byte(inode, n) -
    + EXOFS_DIR_REC_LEN(1);
    + for (; (char *)de <= limit; de = exofs_next_entry(de)) {
    + if (de->rec_len == 0) {
    + EXOFS_ERR("ERROR: "
    + "zero-length directory entry");
    + exofs_put_page(page);
    + return -EIO;
    + }
    + if (de->inode_no) {
    + int over;
    + unsigned char d_type = DT_UNKNOWN;
    +
    + if (types && de->file_type < EXOFS_FT_MAX)
    + d_type = types[de->file_type];
    +
    + offset = (char *)de - kaddr;
    + over = filldir(dirent, de->name, de->name_len,
    + (n<<PAGE_CACHE_SHIFT) | offset,
    + le64_to_cpu(de->inode_no),
    + d_type);
    + if (over) {
    + exofs_put_page(page);
    + return 0;
    + }
    + }
    + filp->f_pos += le16_to_cpu(de->rec_len);
    + }
    + exofs_put_page(page);
    + }
    +
    + return 0;
    +}
    +
    +struct exofs_dir_entry *exofs_find_entry(struct inode *dir,
    + struct dentry *dentry, struct page **res_page)
    +{
    + const unsigned char *name = dentry->d_name.name;
    + int namelen = dentry->d_name.len;
    + unsigned reclen = EXOFS_DIR_REC_LEN(namelen);
    + unsigned long start, n;
    + unsigned long npages = dir_pages(dir);
    + struct page *page = NULL;
    + struct exofs_i_info *oi = exofs_i(dir);
    + struct exofs_dir_entry *de;
    +
    + if (npages == 0)
    + goto out;
    +
    + *res_page = NULL;
    +
    + start = oi->i_dir_start_lookup;
    + if (start >= npages)
    + start = 0;
    + n = start;
    + do {
    + char *kaddr;
    + page = exofs_get_page(dir, n);
    + if (!IS_ERR(page)) {
    + kaddr = page_address(page);
    + de = (struct exofs_dir_entry *) kaddr;
    + kaddr += exofs_last_byte(dir, n) - reclen;
    + while ((char *) de <= kaddr) {
    + if (de->rec_len == 0) {
    + EXOFS_ERR(
    + "ERROR: exofs_find_entry: "
    + "zero-length directory entry");
    + exofs_put_page(page);
    + goto out;
    + }
    + if (exofs_match(namelen, name, de))
    + goto found;
    + de = exofs_next_entry(de);
    + }
    + exofs_put_page(page);
    + }
    + if (++n >= npages)
    + n = 0;
    + } while (n != start);
    +out:
    + return NULL;
    +
    +found:
    + *res_page = page;
    + oi->i_dir_start_lookup = n;
    + return de;
    +}
    +
    +struct exofs_dir_entry *exofs_dotdot(struct inode *dir, struct page **p)
    +{
    + struct page *page = exofs_get_page(dir, 0);
    + struct exofs_dir_entry *de = NULL;
    +
    + if (!IS_ERR(page)) {
    + de = exofs_next_entry(
    + (struct exofs_dir_entry *)page_address(page));
    + *p = page;
    + }
    + return de;
    +}
    +
    +ino_t exofs_inode_by_name(struct inode *dir, struct dentry *dentry)
    +{
    + ino_t res = 0;
    + struct exofs_dir_entry *de;
    + struct page *page;
    +
    + de = exofs_find_entry(dir, dentry, &page);
    + if (de) {
    + res = le64_to_cpu(de->inode_no);
    + exofs_put_page(page);
    + }
    + return res;
    +}
    +
    +void exofs_set_link(struct inode *dir, struct exofs_dir_entry *de,
    + struct page *page, struct inode *inode)
    +{
    + loff_t pos = page_offset(page) +
    + (char *) de - (char *) page_address(page);
    + unsigned len = le16_to_cpu(de->rec_len);
    + int err;
    +
    + lock_page(page);
    + err = exofs_write_begin(NULL, page->mapping, pos, len,
    + AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
    + BUG_ON(err);
    + de->inode_no = cpu_to_le64(inode->i_ino);
    + exofs_set_de_type(de, inode);
    + err = exofs_commit_chunk(page, pos, len);
    + exofs_put_page(page);
    + dir->i_mtime = dir->i_ctime = CURRENT_TIME;
    + mark_inode_dirty(dir);
    +}
    +
    +int exofs_add_link(struct dentry *dentry, struct inode *inode)
    +{
    + struct inode *dir = dentry->d_parent->d_inode;
    + const unsigned char *name = dentry->d_name.name;
    + int namelen = dentry->d_name.len;
    + unsigned chunk_size = exofs_chunk_size(dir);
    + unsigned reclen = EXOFS_DIR_REC_LEN(namelen);
    + unsigned short rec_len, name_len;
    + struct page *page = NULL;
    + struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
    + struct exofs_dir_entry *de;
    + unsigned long npages = dir_pages(dir);
    + unsigned long n;
    + char *kaddr;
    + loff_t pos;
    + int err;
    +
    + for (n = 0; n <= npages; n++) {
    + char *dir_end;
    +
    + page = exofs_get_page(dir, n);
    + err = PTR_ERR(page);
    + if (IS_ERR(page))
    + goto out;
    + lock_page(page);
    + kaddr = page_address(page);
    + dir_end = kaddr + exofs_last_byte(dir, n);
    + de = (struct exofs_dir_entry *)kaddr;
    + kaddr += PAGE_CACHE_SIZE - reclen;
    + while ((char *)de <= kaddr) {
    + if ((char *)de == dir_end) {
    + name_len = 0;
    + rec_len = chunk_size;
    + de->rec_len = cpu_to_le16(chunk_size);
    + de->inode_no = 0;
    + goto got_it;
    + }
    + if (de->rec_len == 0) {
    + EXOFS_ERR("ERROR: exofs_add_link: "
    + "zero-length directory entry");
    + err = -EIO;
    + goto out_unlock;
    + }
    + err = -EEXIST;
    + if (exofs_match(namelen, name, de))
    + goto out_unlock;
    + name_len = EXOFS_DIR_REC_LEN(de->name_len);
    + rec_len = le16_to_cpu(de->rec_len);
    + if (!de->inode_no && rec_len >= reclen)
    + goto got_it;
    + if (rec_len >= name_len + reclen)
    + goto got_it;
    + de = (struct exofs_dir_entry *) ((char *) de + rec_len);
    + }
    + unlock_page(page);
    + exofs_put_page(page);
    + }
    + BUG();
    + return -EINVAL;
    +
    +got_it:
    + pos = page_offset(page) +
    + (char *)de - (char *)page_address(page);
    + err = exofs_write_begin(NULL, page->mapping, pos, rec_len, 0,
    + &page, NULL);
    + if (err)
    + goto out_unlock;
    + if (de->inode_no) {
    + struct exofs_dir_entry *de1 =
    + (struct exofs_dir_entry *)((char *)de + name_len);
    + de1->rec_len = cpu_to_le16(rec_len - name_len);
    + de->rec_len = cpu_to_le16(name_len);
    + de = de1;
    + }
    + de->name_len = namelen;
    + memcpy(de->name, name, namelen);
    + de->inode_no = cpu_to_le64(inode->i_ino);
    + exofs_set_de_type(de, inode);
    + err = exofs_commit_chunk(page, pos, rec_len);
    + dir->i_mtime = dir->i_ctime = CURRENT_TIME;
    + mark_inode_dirty(dir);
    + sbi->s_numfiles++;
    +
    +out_put:
    + exofs_put_page(page);
    +out:
    + return err;
    +out_unlock:
    + unlock_page(page);
    + goto out_put;
    +}
    +
    +int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page)
    +{
    + struct address_space *mapping = page->mapping;
    + struct inode *inode = mapping->host;
    + struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
    + char *kaddr = page_address(page);
    + unsigned from = ((char *)dir - kaddr) & ~(exofs_chunk_size(inode)-1);
    + unsigned to = ((char *)dir - kaddr) + le16_to_cpu(dir->rec_len);
    + loff_t pos;
    + struct exofs_dir_entry *pde = NULL;
    + struct exofs_dir_entry *de = (struct exofs_dir_entry *) (kaddr + from);
    + int err;
    +
    + while ((char *)de < (char *)dir) {
    + if (de->rec_len == 0) {
    + EXOFS_ERR("ERROR: exofs_delete_entry:"
    + "zero-length directory entry");
    + err = -EIO;
    + goto out;
    + }
    + pde = de;
    + de = exofs_next_entry(de);
    + }
    + if (pde)
    + from = (char *)pde - (char *)page_address(page);
    + pos = page_offset(page) + from;
    + lock_page(page);
    + err = exofs_write_begin(NULL, page->mapping, pos, to - from, 0,
    + &page, NULL);
    + BUG_ON(err);
    + if (pde)
    + pde->rec_len = cpu_to_le16(to - from);
    + dir->inode_no = 0;
    + err = exofs_commit_chunk(page, pos, to - from);
    + inode->i_ctime = inode->i_mtime = CURRENT_TIME;
    + mark_inode_dirty(inode);
    + sbi->s_numfiles--;
    +out:
    + exofs_put_page(page);
    + return err;
    +}
    +
    +int exofs_make_empty(struct inode *inode, struct inode *parent)
    +{
    + struct address_space *mapping = inode->i_mapping;
    + struct page *page = grab_cache_page(mapping, 0);
    + unsigned chunk_size = exofs_chunk_size(inode);
    + struct exofs_dir_entry *de;
    + int err;
    + void *kaddr;
    +
    + if (!page)
    + return -ENOMEM;
    +
    + err = exofs_write_begin(NULL, page->mapping, 0, chunk_size, 0,
    + &page, NULL);
    + if (err) {
    + unlock_page(page);
    + goto fail;
    + }
    +
    + kaddr = kmap_atomic(page, KM_USER0);
    + de = (struct exofs_dir_entry *)kaddr;
    + de->name_len = 1;
    + de->rec_len = cpu_to_le16(EXOFS_DIR_REC_LEN(1));
    + memcpy(de->name, ".\0\0", 4);
    + de->inode_no = cpu_to_le64(inode->i_ino);
    + exofs_set_de_type(de, inode);
    +
    + de = (struct exofs_dir_entry *)(kaddr + EXOFS_DIR_REC_LEN(1));
    + de->name_len = 2;
    + de->rec_len = cpu_to_le16(chunk_size - EXOFS_DIR_REC_LEN(1));
    + de->inode_no = cpu_to_le64(parent->i_ino);
    + memcpy(de->name, "..\0", 4);
    + exofs_set_de_type(de, inode);
    + kunmap_atomic(page, KM_USER0);
    + err = exofs_commit_chunk(page, 0, chunk_size);
    +fail:
    + page_cache_release(page);
    + return err;
    +}
    +
    +int exofs_empty_dir(struct inode *inode)
    +{
    + struct page *page = NULL;
    + unsigned long i, npages = dir_pages(inode);
    +
    + for (i = 0; i < npages; i++) {
    + char *kaddr;
    + struct exofs_dir_entry *de;
    + page = exofs_get_page(inode, i);
    +
    + if (IS_ERR(page))
    + continue;
    +
    + kaddr = page_address(page);
    + de = (struct exofs_dir_entry *)kaddr;
    + kaddr += exofs_last_byte(inode, i) - EXOFS_DIR_REC_LEN(1);
    +
    + while ((char *)de <= kaddr) {
    + if (de->rec_len == 0) {
    + EXOFS_ERR("ERROR: exofs_empty_dir: "
    + "zero-length directory entry"
    + "kaddr=%p, de=%p\n", kaddr, de);
    + goto not_empty;
    + }
    + if (de->inode_no != 0) {
    + /* check for . and .. */
    + if (de->name[0] != '.')
    + goto not_empty;
    + if (de->name_len > 2)
    + goto not_empty;
    + if (de->name_len < 2) {
    + if (le64_to_cpu(de->inode_no) !=
    + inode->i_ino)
    + goto not_empty;
    + } else if (de->name[1] != '.')
    + goto not_empty;
    + }
    + de = exofs_next_entry(de);
    + }
    + exofs_put_page(page);
    + }
    + return 1;
    +
    +not_empty:
    + exofs_put_page(page);
    + return 0;
    +}
    +
    +const struct file_operations exofs_dir_operations = {
    + .llseek = generic_file_llseek,
    + .read = generic_read_dir,
    + .readdir = exofs_readdir,
    +};
    diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
    index 59163eb..4c859bd 100644
    --- a/fs/exofs/exofs.h
    +++ b/fs/exofs/exofs.h
    @@ -124,6 +124,11 @@ static inline struct exofs_i_info *exofs_i(struct inode *inode)
    return container_of(inode, struct exofs_i_info, vfs_inode);
    }

    +/*
    + * Maximum count of links to a file
    + */
    +#define EXOFS_LINK_MAX 32000
    +
    /*************************
    * function declarations *
    *************************/
    @@ -142,10 +147,27 @@ int exofs_setattr(struct dentry *, struct iattr *);
    int exofs_write_begin(struct file *file, struct address_space *mapping,
    loff_t pos, unsigned len, unsigned flags,
    struct page **pagep, void **fsdata);
    +extern struct inode *exofs_iget(struct super_block *, unsigned long);
    +struct inode *exofs_new_inode(struct inode *, int);
    +
    +/* dir.c: */
    +int exofs_add_link(struct dentry *, struct inode *);
    +ino_t exofs_inode_by_name(struct inode *, struct dentry *);
    +int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
    +int exofs_make_empty(struct inode *, struct inode *);
    +struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
    + struct page **);
    +int exofs_empty_dir(struct inode *);
    +struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
    +void exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
    + struct inode *);

    /*********************
    * operation vectors *
    *********************/
    +/* dir.c: */
    +extern const struct file_operations exofs_dir_operations;
    +
    /* file.c */
    extern const struct inode_operations exofs_file_inode_operations;
    extern const struct file_operations exofs_file_operations;
    @@ -153,6 +175,10 @@ extern const struct file_operations exofs_file_operations;
    /* inode.c */
    extern const struct address_space_operations exofs_aops;

    +/* namei.c */
    +extern const struct inode_operations exofs_dir_inode_operations;
    +extern const struct inode_operations exofs_special_inode_operations;
    +
    /* symlink.c */
    extern const struct inode_operations exofs_symlink_inode_operations;
    extern const struct inode_operations exofs_fast_symlink_inode_operations;
    diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
    index f4979ea..8d3385c 100644
    --- a/fs/exofs/inode.c
    +++ b/fs/exofs/inode.c
    @@ -468,3 +468,275 @@ int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
    error = inode_setattr(inode, iattr);
    return error;
    }
    +
    +/*
    + * Read an inode from the OSD, and return it as is. We also return the size
    + * attribute in the 'sanity' argument if we got compiled with debugging turned
    + * on.
    + */
    +static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
    + struct exofs_fcb *inode, uint64_t *sanity)
    +{
    + struct exofs_sb_info *sbi = sb->s_fs_info;
    + struct osd_request *or;
    + struct osd_attr attr;
    + struct osd_obj_id obj = {sbi->s_pid,
    + oi->vfs_inode.i_ino + EXOFS_OBJ_OFF};
    + int ret;
    +
    + exofs_make_credential(oi->i_cred, &obj);
    +
    + or = osd_start_request(sbi->s_dev, GFP_KERNEL);
    + if (unlikely(!or)) {
    + EXOFS_ERR("exofs_get_inode: osd_start_request failed.\n");
    + return -ENOMEM;
    + }
    + osd_req_get_attributes(or, &obj);
    +
    + /* we need the inode attribute */
    + osd_req_add_get_attr_list(or, &g_attr_inode_data, 1);
    +
    +#ifdef EXOFS_DEBUG_OBJ_ISIZE
    + /* we get the size attributes to do a sanity check */
    + osd_req_add_get_attr_list(or, &g_attr_logical_length, 1);
    +#endif
    +
    + ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred);
    + if (ret)
    + goto out;
    +
    + attr = g_attr_inode_data;
    + ret = extract_attr_from_req(or, &attr);
    + if (ret) {
    + EXOFS_ERR("exofs_get_inode: extract_attr_from_req failed\n");
    + goto out;
    + }
    +
    + WARN_ON(attr.len != EXOFS_INO_ATTR_SIZE);
    + memcpy(inode, attr.val_ptr, EXOFS_INO_ATTR_SIZE);
    +
    +#ifdef EXOFS_DEBUG_OBJ_ISIZE
    + attr = g_attr_logical_length;
    + ret = extract_attr_from_req(or, &attr);
    + if (ret) {
    + EXOFS_ERR("ERROR: extract attr from or failed\n");
    + goto out;
    + }
    + *sanity = get_unaligned_be64(attr.val_ptr);
    +#endif
    +
    +out:
    + osd_end_request(or);
    + return ret;
    +}
    +
    +/*
    + * Fill in an inode read from the OSD and set it up for use
    + */
    +struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
    +{
    + struct exofs_i_info *oi;
    + struct exofs_fcb fcb;
    + struct inode *inode;
    + uint64_t sanity;
    + int ret;
    +
    + inode = iget_locked(sb, ino);
    + if (!inode)
    + return ERR_PTR(-ENOMEM);
    + if (!(inode->i_state & I_NEW))
    + return inode;
    + oi = exofs_i(inode);
    +
    + /* read the inode from the osd */
    + ret = exofs_get_inode(sb, oi, &fcb, &sanity);
    + if (ret)
    + goto bad_inode;
    +
    + init_waitqueue_head(&oi->i_wq);
    + set_obj_created(oi);
    +
    + /* copy stuff from on-disk struct to in-memory struct */
    + inode->i_mode = le16_to_cpu(fcb.i_mode);
    + inode->i_uid = le32_to_cpu(fcb.i_uid);
    + inode->i_gid = le32_to_cpu(fcb.i_gid);
    + inode->i_nlink = le16_to_cpu(fcb.i_links_count);
    + inode->i_ctime.tv_sec = (signed)le32_to_cpu(fcb.i_ctime);
    + inode->i_atime.tv_sec = (signed)le32_to_cpu(fcb.i_atime);
    + inode->i_mtime.tv_sec = (signed)le32_to_cpu(fcb.i_mtime);
    + inode->i_ctime.tv_nsec =
    + inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = 0;
    + oi->i_commit_size = le64_to_cpu(fcb.i_size);
    + i_size_write(inode, oi->i_commit_size);
    + inode->i_blkbits = EXOFS_BLKSHIFT;
    + inode->i_generation = le32_to_cpu(fcb.i_generation);
    +
    +#ifdef EXOFS_DEBUG_OBJ_ISIZE
    + if ((inode->i_size != sanity) &&
    + (!exofs_inode_is_fast_symlink(inode))) {
    + EXOFS_ERR("WARNING: Size of object from inode and "
    + "attributes differ (%lld != %llu)\n",
    + inode->i_size, _LLU(sanity));
    + }
    +#endif
    +
    + oi->i_dir_start_lookup = 0;
    +
    + if ((inode->i_nlink == 0) && (inode->i_mode == 0)) {
    + ret = -ESTALE;
    + goto bad_inode;
    + }
    +
    + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
    + if (fcb.i_data[0])
    + inode->i_rdev =
    + old_decode_dev(le32_to_cpu(fcb.i_data[0]));
    + else
    + inode->i_rdev =
    + new_decode_dev(le32_to_cpu(fcb.i_data[1]));
    + } else {
    + memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
    + }
    +
    + if (S_ISREG(inode->i_mode)) {
    + inode->i_op = &exofs_file_inode_operations;
    + inode->i_fop = &exofs_file_operations;
    + inode->i_mapping->a_ops = &exofs_aops;
    + } else if (S_ISDIR(inode->i_mode)) {
    + inode->i_op = &exofs_dir_inode_operations;
    + inode->i_fop = &exofs_dir_operations;
    + inode->i_mapping->a_ops = &exofs_aops;
    + } else if (S_ISLNK(inode->i_mode)) {
    + if (exofs_inode_is_fast_symlink(inode))
    + inode->i_op = &exofs_fast_symlink_inode_operations;
    + else {
    + inode->i_op = &exofs_symlink_inode_operations;
    + inode->i_mapping->a_ops = &exofs_aops;
    + }
    + } else {
    + inode->i_op = &exofs_special_inode_operations;
    + if (fcb.i_data[0])
    + init_special_inode(inode, inode->i_mode,
    + old_decode_dev(le32_to_cpu(fcb.i_data[0])));
    + else
    + init_special_inode(inode, inode->i_mode,
    + new_decode_dev(le32_to_cpu(fcb.i_data[1])));
    + }
    +
    + unlock_new_inode(inode);
    + return inode;
    +
    +bad_inode:
    + iget_failed(inode);
    + return ERR_PTR(ret);
    +}
    +
    +int __exofs_wait_obj_created(struct exofs_i_info *oi)
    +{
    + if (!obj_created(oi)) {
    + BUG_ON(!obj_2bcreated(oi));
    + wait_event(oi->i_wq, obj_created(oi));
    + }
    + return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0;
    +}
    +/*
    + * Callback function from exofs_new_inode(). The important thing is that we
    + * set the obj_created flag so that other methods know that the object exists on
    + * the OSD.
    + */
    +static void create_done(struct osd_request *or, void *p)
    +{
    + struct inode *inode = p;
    + struct exofs_i_info *oi = exofs_i(inode);
    + struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
    + int ret;
    +
    + ret = exofs_check_ok(or);
    + osd_end_request(or);
    + atomic_dec(&sbi->s_curr_pending);
    +
    + if (unlikely(ret)) {
    + EXOFS_ERR("object=0x%llx creation faild in pid=0x%llx",
    + _LLU(sbi->s_pid), _LLU(inode->i_ino + EXOFS_OBJ_OFF));
    + make_bad_inode(inode);
    + } else
    + set_obj_created(oi);
    +
    + atomic_dec(&inode->i_count);
    + wake_up(&oi->i_wq);
    +}
    +
    +/*
    + * Set up a new inode and create an object for it on the OSD
    + */
    +struct inode *exofs_new_inode(struct inode *dir, int mode)
    +{
    + struct super_block *sb;
    + struct inode *inode;
    + struct exofs_i_info *oi;
    + struct exofs_sb_info *sbi;
    + struct osd_request *or;
    + struct osd_obj_id obj;
    + int ret;
    +
    + sb = dir->i_sb;
    + inode = new_inode(sb);
    + if (!inode)
    + return ERR_PTR(-ENOMEM);
    +
    + oi = exofs_i(inode);
    +
    + init_waitqueue_head(&oi->i_wq);
    + set_obj_2bcreated(oi);
    +
    + sbi = sb->s_fs_info;
    +
    + sb->s_dirt = 1;
    + inode->i_uid = current->cred->fsuid;
    + if (dir->i_mode & S_ISGID) {
    + inode->i_gid = dir->i_gid;
    + if (S_ISDIR(mode))
    + mode |= S_ISGID;
    + } else {
    + inode->i_gid = current->cred->fsgid;
    + }
    + inode->i_mode = mode;
    +
    + inode->i_ino = sbi->s_nextid++;
    + inode->i_blkbits = EXOFS_BLKSHIFT;
    + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
    + oi->i_commit_size = inode->i_size = 0;
    + spin_lock(&sbi->s_next_gen_lock);
    + inode->i_generation = sbi->s_next_generation++;
    + spin_unlock(&sbi->s_next_gen_lock);
    + insert_inode_hash(inode);
    +
    + mark_inode_dirty(inode);
    +
    + obj.partition = sbi->s_pid;
    + obj.id = inode->i_ino + EXOFS_OBJ_OFF;
    + exofs_make_credential(oi->i_cred, &obj);
    +
    + or = osd_start_request(sbi->s_dev, GFP_KERNEL);
    + if (unlikely(!or)) {
    + EXOFS_ERR("exofs_new_inode: osd_start_request failed\n");
    + return ERR_PTR(-ENOMEM);
    + }
    +
    + osd_req_create_object(or, &obj);
    +
    + /* increment the refcount so that the inode will still be around when we
    + * reach the callback
    + */
    + atomic_inc(&inode->i_count);
    +
    + ret = exofs_async_op(or, create_done, inode, oi->i_cred);
    + if (ret) {
    + atomic_dec(&inode->i_count);
    + osd_end_request(or);
    + return ERR_PTR(-EIO);
    + }
    + atomic_inc(&sbi->s_curr_pending);
    +
    + return inode;
    +}
    diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
    new file mode 100644
    index 0000000..4220d90
    --- /dev/null
    +++ b/fs/exofs/namei.c
    @@ -0,0 +1,338 @@
    +/*
    + * Copyright (C) 2005, 2006
    + * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
    + * Copyright (C) 2005, 2006
    + * International Business Machines
    + * Copyright (C) 2008, 2009
    + * Boaz Harrosh <bharrosh@panasas.com>
    + *
    + * Copyrights for code taken from ext2:
    + * Copyright (C) 1992, 1993, 1994, 1995
    + * Remy Card (card@masi.ibp.fr)
    + * Laboratoire MASI - Institut Blaise Pascal
    + * Universite Pierre et Marie Curie (Paris VI)
    + * from
    + * linux/fs/minix/inode.c
    + * Copyright (C) 1991, 1992 Linus Torvalds
    + *
    + * This file is part of exofs.
    + *
    + * exofs is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation. Since it is based on ext2, and the only
    + * valid version of GPL for the Linux kernel is version 2, the only valid
    + * version of GPL for exofs is version 2.
    + *
    + * exofs 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 General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with exofs; if not, write to the Free Software
    + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + */
    +
    +#include "exofs.h"
    +
    +static inline int exofs_add_nondir(struct dentry *dentry, struct inode *inode)
    +{
    + int err = exofs_add_link(dentry, inode);
    + if (!err) {
    + d_instantiate(dentry, inode);
    + return 0;
    + }
    + inode_dec_link_count(inode);
    + iput(inode);
    + return err;
    +}
    +
    +static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
    + struct nameidata *nd)
    +{
    + struct inode *inode;
    + ino_t ino;
    +
    + if (dentry->d_name.len > EXOFS_NAME_LEN)
    + return ERR_PTR(-ENAMETOOLONG);
    +
    + ino = exofs_inode_by_name(dir, dentry);
    + inode = NULL;
    + if (ino) {
    + inode = exofs_iget(dir->i_sb, ino);
    + if (IS_ERR(inode))
    + return ERR_CAST(inode);
    + }
    + return d_splice_alias(inode, dentry);
    +}
    +
    +static int exofs_create(struct inode *dir, struct dentry *dentry, int mode,
    + struct nameidata *nd)
    +{
    + struct inode *inode = exofs_new_inode(dir, mode);
    + int err = PTR_ERR(inode);
    + if (!IS_ERR(inode)) {
    + inode->i_op = &exofs_file_inode_operations;
    + inode->i_fop = &exofs_file_operations;
    + inode->i_mapping->a_ops = &exofs_aops;
    + mark_inode_dirty(inode);
    + err = exofs_add_nondir(dentry, inode);
    + }
    + return err;
    +}
    +
    +static int exofs_mknod(struct inode *dir, struct dentry *dentry, int mode,
    + dev_t rdev)
    +{
    + struct inode *inode;
    + int err;
    +
    + if (!new_valid_dev(rdev))
    + return -EINVAL;
    +
    + inode = exofs_new_inode(dir, mode);
    + err = PTR_ERR(inode);
    + if (!IS_ERR(inode)) {
    + init_special_inode(inode, inode->i_mode, rdev);
    + mark_inode_dirty(inode);
    + err = exofs_add_nondir(dentry, inode);
    + }
    + return err;
    +}
    +
    +static int exofs_symlink(struct inode *dir, struct dentry *dentry,
    + const char *symname)
    +{
    + struct super_block *sb = dir->i_sb;
    + int err = -ENAMETOOLONG;
    + unsigned l = strlen(symname)+1;
    + struct inode *inode;
    + struct exofs_i_info *oi;
    +
    + if (l > sb->s_blocksize)
    + goto out;
    +
    + inode = exofs_new_inode(dir, S_IFLNK | S_IRWXUGO);
    + err = PTR_ERR(inode);
    + if (IS_ERR(inode))
    + goto out;
    +
    + oi = exofs_i(inode);
    + if (l > sizeof(oi->i_data)) {
    + /* slow symlink */
    + inode->i_op = &exofs_symlink_inode_operations;
    + inode->i_mapping->a_ops = &exofs_aops;
    + memset(oi->i_data, 0, sizeof(oi->i_data));
    +
    + err = page_symlink(inode, symname, l);
    + if (err)
    + goto out_fail;
    + } else {
    + /* fast symlink */
    + inode->i_op = &exofs_fast_symlink_inode_operations;
    + memcpy(oi->i_data, symname, l);
    + inode->i_size = l-1;
    + }
    + mark_inode_dirty(inode);
    +
    + err = exofs_add_nondir(dentry, inode);
    +out:
    + return err;
    +
    +out_fail:
    + inode_dec_link_count(inode);
    + iput(inode);
    + goto out;
    +}
    +
    +static int exofs_link(struct dentry *old_dentry, struct inode *dir,
    + struct dentry *dentry)
    +{
    + struct inode *inode = old_dentry->d_inode;
    +
    + if (inode->i_nlink >= EXOFS_LINK_MAX)
    + return -EMLINK;
    +
    + inode->i_ctime = CURRENT_TIME;
    + inode_inc_link_count(inode);
    + atomic_inc(&inode->i_count);
    +
    + return exofs_add_nondir(dentry, inode);
    +}
    +
    +static int exofs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
    +{
    + struct inode *inode;
    + int err = -EMLINK;
    +
    + if (dir->i_nlink >= EXOFS_LINK_MAX)
    + goto out;
    +
    + inode_inc_link_count(dir);
    +
    + inode = exofs_new_inode(dir, S_IFDIR | mode);
    + err = PTR_ERR(inode);
    + if (IS_ERR(inode))
    + goto out_dir;
    +
    + inode->i_op = &exofs_dir_inode_operations;
    + inode->i_fop = &exofs_dir_operations;
    + inode->i_mapping->a_ops = &exofs_aops;
    +
    + inode_inc_link_count(inode);
    +
    + err = exofs_make_empty(inode, dir);
    + if (err)
    + goto out_fail;
    +
    + err = exofs_add_link(dentry, inode);
    + if (err)
    + goto out_fail;
    +
    + d_instantiate(dentry, inode);
    +out:
    + return err;
    +
    +out_fail:
    + inode_dec_link_count(inode);
    + inode_dec_link_count(inode);
    + iput(inode);
    +out_dir:
    + inode_dec_link_count(dir);
    + goto out;
    +}
    +
    +static int exofs_unlink(struct inode *dir, struct dentry *dentry)
    +{
    + struct inode *inode = dentry->d_inode;
    + struct exofs_dir_entry *de;
    + struct page *page;
    + int err = -ENOENT;
    +
    + de = exofs_find_entry(dir, dentry, &page);
    + if (!de)
    + goto out;
    +
    + err = exofs_delete_entry(de, page);
    + if (err)
    + goto out;
    +
    + inode->i_ctime = dir->i_ctime;
    + inode_dec_link_count(inode);
    + err = 0;
    +out:
    + return err;
    +}
    +
    +static int exofs_rmdir(struct inode *dir, struct dentry *dentry)
    +{
    + struct inode *inode = dentry->d_inode;
    + int err = -ENOTEMPTY;
    +
    + if (exofs_empty_dir(inode)) {
    + err = exofs_unlink(dir, dentry);
    + if (!err) {
    + inode->i_size = 0;
    + inode_dec_link_count(inode);
    + inode_dec_link_count(dir);
    + }
    + }
    + return err;
    +}
    +
    +static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry,
    + struct inode *new_dir, struct dentry *new_dentry)
    +{
    + struct inode *old_inode = old_dentry->d_inode;
    + struct inode *new_inode = new_dentry->d_inode;
    + struct page *dir_page = NULL;
    + struct exofs_dir_entry *dir_de = NULL;
    + struct page *old_page;
    + struct exofs_dir_entry *old_de;
    + int err = -ENOENT;
    +
    + old_de = exofs_find_entry(old_dir, old_dentry, &old_page);
    + if (!old_de)
    + goto out;
    +
    + if (S_ISDIR(old_inode->i_mode)) {
    + err = -EIO;
    + dir_de = exofs_dotdot(old_inode, &dir_page);
    + if (!dir_de)
    + goto out_old;
    + }
    +
    + if (new_inode) {
    + struct page *new_page;
    + struct exofs_dir_entry *new_de;
    +
    + err = -ENOTEMPTY;
    + if (dir_de && !exofs_empty_dir(new_inode))
    + goto out_dir;
    +
    + err = -ENOENT;
    + new_de = exofs_find_entry(new_dir, new_dentry, &new_page);
    + if (!new_de)
    + goto out_dir;
    + inode_inc_link_count(old_inode);
    + exofs_set_link(new_dir, new_de, new_page, old_inode);
    + new_inode->i_ctime = CURRENT_TIME;
    + if (dir_de)
    + drop_nlink(new_inode);
    + inode_dec_link_count(new_inode);
    + } else {
    + if (dir_de) {
    + err = -EMLINK;
    + if (new_dir->i_nlink >= EXOFS_LINK_MAX)
    + goto out_dir;
    + }
    + inode_inc_link_count(old_inode);
    + err = exofs_add_link(new_dentry, old_inode);
    + if (err) {
    + inode_dec_link_count(old_inode);
    + goto out_dir;
    + }
    + if (dir_de)
    + inode_inc_link_count(new_dir);
    + }
    +
    + old_inode->i_ctime = CURRENT_TIME;
    +
    + exofs_delete_entry(old_de, old_page);
    + inode_dec_link_count(old_inode);
    +
    + if (dir_de) {
    + exofs_set_link(old_inode, dir_de, dir_page, new_dir);
    + inode_dec_link_count(old_dir);
    + }
    + return 0;
    +
    +
    +out_dir:
    + if (dir_de) {
    + kunmap(dir_page);
    + page_cache_release(dir_page);
    + }
    +out_old:
    + kunmap(old_page);
    + page_cache_release(old_page);
    +out:
    + return err;
    +}
    +
    +const struct inode_operations exofs_dir_inode_operations = {
    + .create = exofs_create,
    + .lookup = exofs_lookup,
    + .link = exofs_link,
    + .unlink = exofs_unlink,
    + .symlink = exofs_symlink,
    + .mkdir = exofs_mkdir,
    + .rmdir = exofs_rmdir,
    + .mknod = exofs_mknod,
    + .rename = exofs_rename,
    + .setattr = exofs_setattr,
    +};
    +
    +const struct inode_operations exofs_special_inode_operations = {
    + .setattr = exofs_setattr,
    +};
    --
    1.6.0.1


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      Last update: 2009-02-09 14:27    [W:0.105 / U:147.220 seconds]
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