@@ -458,6 +458,9 @@
This option will enlarge your kernel, but it allows debugging of
ocfs2 filesystem issues.
-
+
+config MINI_FO
+ tristate "Mini fanout overlay filesystem"
+
+ check_mini_fo_dentry(dentry);
+ if(dtost(dentry) == MODIFIED || dtost(dentry) == CREATED || dtost(dentry) == DEL_REWRITTEN)
+ return 1;
-+ return 0;
++ return 0;
+}
+
+/* check if dentry is in an existing state */
-+int is_mini_fo_existant(dentry_t *dentry)
++int is_mini_fo_existant(dentry_t *dentry)
+{
+ check_mini_fo_dentry(dentry);
+
+ return 1;
+}
+
-+/*
-+ * This function will create a negative storage dentry for
++/*
++ * This function will create a negative storage dentry for
+ * dentry, what is required for many create like options.
+ * It will create the storage structure if necessary.
+ */
-+int get_neg_sto_dentry(dentry_t *dentry)
++int get_neg_sto_dentry(dentry_t *dentry)
+{
+ int err = 0;
+ unsigned int len;
+ if(dtost(dentry->d_parent) == UNMODIFIED) {
+ /* build sto struct */
+ err = build_sto_structure(dentry->d_parent->d_parent, dentry->d_parent);
-+ if(err ||
++ if(err ||
+ dtost(dentry->d_parent) != MODIFIED) {
+ printk(KERN_CRIT "mini_fo: get_neg_sto_dentry: ERROR building sto structure.\n");
+ err = -1;
+ goto out;
-+ }
++ }
+ }
+
+ len = dentry->d_name.len;
+ name = dentry->d_name.name;
-+
-+ dtohd2(dentry) =
++
++ dtohd2(dentry) =
+ lookup_one_len(name, dtohd2(dentry->d_parent), len);
+
+ out:
+ ASSERT(dentry != NULL);
+ ASSERT(dtopd(dentry) != NULL);
+ ASSERT((dtohd(dentry) != NULL) || (dtohd2(dentry) != NULL));
-+
++
+/* if(dtost(dentry) == MODIFIED) { */
+/* ASSERT(dentry->d_inode != NULL); */
+/* ASSERT(dtohd(dentry) != NULL); */
+/* ASSERT(dentry->d_inode != NULL); */
+/* ASSERT( */
+/* } */
-+ return 0;
++ return 0;
+}
+
+int check_mini_fo_file(file_t *file)
+ ASSERT(file != NULL);
+ ASSERT(ftopd(file) != NULL);
+ ASSERT(file->f_dentry != NULL);
-+
-+ /* violent checking, check depending of state and type
++
++ /* violent checking, check depending of state and type
+ * if(S_ISDIR(file->f_dentry->d_inode->i_mode)) {}
+ */
+ ASSERT((ftohf(file) != NULL) || (ftohf2(file) != NULL));
+ return 0;
+}
+
-+/*
++/*
+ * will walk a base path as provided by get_mini_fo_bpath and return
+ * the (hopefully ;-) ) positive dentry of the renamed base dir.
+ *
+ * This does some work of path_init.
+ */
-+dentry_t *bpath_walk(super_block_t *sb, char *bpath)
++dentry_t *bpath_walk(super_block_t *sb, char *bpath)
+{
+ int err;
+ struct vfsmount *mnt;
+ printk(KERN_CRIT "mini_fo: bpath_walk: Invalid sb.\n");
+ return NULL;
+ }
-+
-+ /* fix this: how do I reach this lock?
++
++ /* fix this: how do I reach this lock?
+ * read_lock(¤t->fs->lock); */
+ mnt = mntget(stopd(sb)->hidden_mnt);
+ /* read_unlock(¤t->fs->lock); */
-+
++
+ err = vfs_path_lookup(mnt->mnt_root, mnt, bpath+1, 0, &nd);
+
+ /* validate */
-+ if (err || !nd.path.dentry || !nd.path.dentry->d_inode) {
++ if (err || !nd.dentry || !nd.dentry->d_inode) {
+ printk(KERN_CRIT "mini_fo: bpath_walk: path_walk failed.\n");
+ return NULL;
+ }
-+ return nd.path.dentry;
++ return nd.dentry;
+}
+
+
+ char *buf_walker;
+ int len = 0;
+ dentry_t *sky_walker;
-+
++
+ if(!dentry || !dtohd(dentry)) {
+ printk(KERN_CRIT "mini_fo: get_mini_fo_bpath: invalid dentry passed.\n");
+ return -1;
+ buf_walker = *bpath+len; /* put it on last char */
+ *buf_walker = '\n';
+ sky_walker = dtohd(dentry);
-+
++
+ do {
+ buf_walker -= sky_walker->d_name.len;
-+ strncpy(buf_walker,
-+ sky_walker->d_name.name,
++ strncpy(buf_walker,
++ sky_walker->d_name.name,
+ sky_walker->d_name.len);
+ *(--buf_walker) = '/';
+ sky_walker = sky_walker->d_parent;
+ */
+ bytes = len = PAGE_SIZE;
+ while(bytes == len) {
-+ bytes = src_file->f_op->read(src_file, buf, len,
++ bytes = src_file->f_op->read(src_file, buf, len,
+ &src_file->f_pos);
-+ tmp = tgt_file->f_op->write(tgt_file, buf, bytes,
++ tmp = tgt_file->f_op->write(tgt_file, buf, bytes,
+ &tgt_file->f_pos);
+ if(tmp != bytes) {
+ printk(KERN_CRIT "mini_fo_cp_cont: ERROR writing.\n");
+{
+ struct ndl_entry *tmp_entry;
+
-+ tmp_entry = (struct ndl_entry *)
++ tmp_entry = (struct ndl_entry *)
+ kmalloc(sizeof(struct ndl_entry), GFP_KERNEL);
+ if(!tmp_entry) {
+ printk(KERN_CRIT "mini_fo: ndl_add_entry: out of mem.\n");
+
+ if(!hidden_sto_dentry) {
+ /*
-+ * This is the case after creating the first
++ * This is the case after creating the first
+ * hidden_sto_dentry.
-+ * After one negative storage_dentry, all pointers to
++ * After one negative storage_dentry, all pointers to
+ * hidden_storage dentries are set to NULL. We need to
+ * create the negative dentry before we create the storage
+ * file.
+ dput(dir);
+ return err;
+ }
-+
++
+ /* everything ok! */
+ if(!dtohd2(dentry)->d_inode) {
+ printk(KERN_CRIT "mini_fo: build_sto_structure: failed to create storage dir [2].\n");
+ itopd(dentry->d_inode)->deleted_list_size = -1;
+ itopd(dentry->d_inode)->renamed_list_size = -1;
+ meta_build_lists(dentry);
-+
++
+ fist_copy_attr_all(dentry->d_inode, itohi2(dentry->d_inode));
-+ fist_copy_attr_timesizes(dir->d_inode,
++ fist_copy_attr_timesizes(dir->d_inode,
+ hidden_sto_dir_dentry->d_inode);
+ dir->d_inode->i_nlink++;
+ /* was: unlock_dir(hidden_sto_dir_dentry); */
+
+ * Add tons of ugly ifdefs to Ed L. Cashin's mutex patch to
+ retain backwards compatibility.
-+
++
+2006-01-24 Ed L. Cashin <ecashin@coraid.com>
+
+ * Support for the new mutex infrastructure
+
+ * Makefile: clean it up and added make install and make
+ uninstall.
-+
++
+2005-05-06 <mk@mary>
+
+ * merged devel branch back to main. [v0-6-0-pre3]
+
+ * inode.c: rename_reg_file renamed to rename_nondir, as it
+ doesn't matter as long it't not a dir. Removed all
-+ rename_dev_file etc.
++ rename_dev_file etc.
+
+ * tagged as devel-0-0-15
+
+2005-04-23 <mk@mary>
+
+ * state.c, aux.c: more cleaning up and
-+ simplifications. [devel-0-0-13]
++ simplifications. [devel-0-0-13]
+
+ * inode.c: implemented mini_fo_getattr, that was required for
+ 2.6 because inode_revalidate has been remove there, and the
+ * Rewrote mini_fo rename and split it into several
+ subfunctions, that handle the different types
+ seperately. Rewrote the regular file function aswell, as it
-+ was implemented somewhat inefficient.
++ was implemented somewhat inefficient.
+
+2005-03-16 Markus Klotzbuecher <mk@chasey>
+
-+ * Implemented new META subsystem, removed old WOL stuff in favor
++ * Implemented new META subsystem, removed old WOL stuff in favor
+ if it.
+
+ * After some basic testing everything seems ok...
+ files. mini_fo_rename still isn't implemented properly, renaming
+ of device files, symlinks etc. results in a empty regular file
+ instead of the proper type.
-+
++
+ * Directory renaming suddenly works! What a surprise! I guess
+ this is because renaming is implemented as making a copy and
+ removing the original. Still this might not work
+ the state numbers.
+
+2005-03-08 Markus Klotzbuecher <mk@chasey>
-+
++
+ * Makefile fix, fist_ioctl was built against wrong sources if ARCH=um
+
+ * Fixed a bug in dentry.c, mini_fo_d_hash. In state 4 =
+2004-10-24 Gleb Natapov <gleb@nbase.co.il>
+
+ * Fix: owner and group where not correctly copied from base to
-+ storage.
++ storage.
+
+
+2004-10-05 Gleb Natapov <gleb@nbase.co.il>
+
+ * Implementation of fsync, fasync and lock mini_fo functions.
-+
++
+
+2004-09-29 Bob Lee <bob@pantasys.com>
+
+ * Fix of a serious pointer bug
-+
++
+
+2004-09-28 Gleb Natapov <gleb@nbase.co.il>
+
+ * Implementation of mini_fo_mknod and mini_fo_rename, support
+ for device files.
-+
++
Index: linux-2.6.23/fs/mini_fo/dentry.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+ hidden_sto_dentry->d_op &&
+ hidden_sto_dentry->d_op->d_revalidate) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-+ err2 = hidden_sto_dentry->d_op->d_revalidate(hidden_sto_dentry,
++ err2 = hidden_sto_dentry->d_op->d_revalidate(hidden_sto_dentry,
+ nd);
+#else
-+ err2 = hidden_sto_dentry->d_op->d_revalidate(hidden_sto_dentry,
++ err2 = hidden_sto_dentry->d_op->d_revalidate(hidden_sto_dentry,
+ flags);
+#endif
+ }
+ hidden_file->f_pos = file->f_pos;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-+ memcpy(&(hidden_file->f_ra),
-+ &(file->f_ra),
++ memcpy(&(hidden_file->f_ra),
++ &(file->f_ra),
+ sizeof(struct file_ra_state));
+#else
+ if (file->f_reada) { /* update readahead information if needed */
+ */
+ if (err >= 0)
+ fist_copy_attr_times(inode, hidden_inode);
-+
++
+ *ppos = pos;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+ /*
+ * - be able to call wol functions in order to avoid listing deleted
+ * base files.
+ * - if we're reading a directory which is in state 1, we need to
-+ * maintain a list (in mini_fo_filldir) of which files allready
++ * maintain a list (in mini_fo_filldir) of which files allready
+ * have been copied to userspace,to detect files existing in base
+ * and storage and not list them twice.
+ */
+ /* check if file has been deleted */
+ if(meta_check_d_entry(file->f_dentry, name, namlen))
+ return 0;
-+
++
+ /* do duplicate checking */
+ if(ndl_check_entry(&ftopd(file)->rd, name, namlen))
+ return 0;
+ ftopd(file)->rd.sto_done = 0;
+ do {
+ if (ftopd(file) != NULL) {
-+ if(ftohf2(file)) {
++ if(ftohf2(file)) {
+ hidden_sto_file = ftohf2(file);
+ err = vfs_readdir(hidden_sto_file, mini_fo_filldir, dirent);
+ file->f_pos = hidden_sto_file->f_pos;
+
+ ftopd(file)->rd.sto_done = 1;
+
-+ if(ftohf(file)) {
++ if(ftohf(file)) {
+ hidden_file = ftohf(file);
+ err = vfs_readdir(hidden_file, mini_fo_filldir, dirent);
+ file->f_pos = hidden_file->f_pos;
+mini_fo_open(inode_t *inode, file_t *file)
+{
+ int err = 0;
-+ int hidden_flags;
++ int hidden_flags;
+ file_t *hidden_file = NULL;
+ dentry_t *hidden_dentry = NULL;
+
+ file_t *hidden_sto_file = NULL;
+ dentry_t *hidden_sto_dentry = NULL;
+
-+ __ftopd(file) =
++ __ftopd(file) =
+ kmalloc(sizeof(struct mini_fo_file_info), GFP_KERNEL);
+ if (!ftopd(file)) {
+ err = -ENOMEM;
+ goto out;
+ }
+ ftohf2(file) = hidden_sto_file; /* link storage file */
-+
++
+ out:
+ if (err < 0 && ftopd(file)) {
+ kfree(ftopd(file));
+ int err1 = 0; /* assume ok (see open.c:close_fp) */
+ int err2 = 0;
+ file_t *hidden_file = NULL;
-+
++
+ check_mini_fo_file(file);
+
+ /* mk: we don't do any state checking here, as its not worth the time.
+ if((hidden_file = ftohf2(file)) != NULL) {
+ err2 = hidden_file->f_op->fasync(fd, hidden_file, flag);
+ }
-+
++
+ return (err1 || err2);
+}
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
-+#endif
++#endif
+
+#include "fist.h"
+#include "mini_fo.h"
+ dentry_t *hidden_sto_dentry = NULL;
+
+ /* whiteout flag */
-+ int del_flag = 0;
++ int del_flag = 0;
+ char *bpath = NULL;
+
+ const char *name;
+ err= -EINVAL;
+ goto out;
+ }
-+
++
+ /* this can be set up safely without fear of spaghetti
+ * interposing as it is only used for copying times */
+ hidden_dir_dentry = hidden_dentry->d_parent;
+ kfree(bpath);
+ }
+ else if(hidden_dir_dentry && hidden_dir_dentry->d_inode)
-+ hidden_dentry =
++ hidden_dentry =
+ lookup_one_len(name, hidden_dir_dentry, namelen);
+ else
+ hidden_dentry = NULL;
+
+ if(hidden_sto_dir_dentry && hidden_sto_dir_dentry->d_inode)
-+ hidden_sto_dentry =
++ hidden_sto_dentry =
+ lookup_one_len(name, hidden_sto_dir_dentry, namelen);
+ else
+ hidden_sto_dentry = NULL;
+
+ /* catch error in lookup */
+ if (IS_ERR(hidden_dentry) || IS_ERR(hidden_sto_dentry)) {
-+ /* mk: we need to call dput on the dentry, whose
++ /* mk: we need to call dput on the dentry, whose
+ * lookup_one_len operation failed, in order to avoid
+ * unmount trouble.
+ */
+ /* allocate dentry private data */
+ __dtopd(dentry) = (struct mini_fo_dentry_info *)
+ kmalloc(sizeof(struct mini_fo_dentry_info), GFP_KERNEL);
-+
++
+ if (!dtopd(dentry)) {
+ err = -ENOMEM;
+ goto out_dput;
+ }
+
+ /* check for different states of the mini_fo file to be looked up. */
-+
++
+ /* state 1, file has been modified */
+ if(hidden_dentry && hidden_sto_dentry &&
+ hidden_dentry->d_inode && hidden_sto_dentry->d_inode && !del_flag) {
+
+ /* state 4, file has deleted and created again. */
+ if(hidden_dentry && hidden_sto_dentry &&
-+ hidden_dentry->d_inode &&
++ hidden_dentry->d_inode &&
+ hidden_sto_dentry->d_inode && del_flag) {
+
+ fist_copy_attr_atime(dir, hidden_sto_dir_dentry->d_inode);
+ }
+ /* state 5, file has been deleted in base */
+ if(hidden_dentry && hidden_sto_dentry &&
-+ hidden_dentry->d_inode &&
++ hidden_dentry->d_inode &&
+ !hidden_sto_dentry->d_inode && del_flag) {
+
+ /* check which parents atime we need for updating */
+ if(hidden_sto_dir_dentry->d_inode)
-+ fist_copy_attr_atime(dir,
++ fist_copy_attr_atime(dir,
+ hidden_sto_dir_dentry->d_inode);
+ else
-+ fist_copy_attr_atime(dir,
++ fist_copy_attr_atime(dir,
+ hidden_dir_dentry->d_inode);
+
+ dtopd(dentry)->state = DELETED;
+ dtohd(old_dentry) = NULL;
+ dtost(old_dentry) = DEL_REWRITTEN;
+ }
-+
++
+ err = get_neg_sto_dentry(new_dentry);
+ if(err) {
+ err = -EINVAL;
+#endif
+
+ /* Fail if the symlink file exists */
-+ if(!(dtost(dentry) == DELETED ||
++ if(!(dtost(dentry) == DELETED ||
+ dtost(dentry) == NON_EXISTANT)) {
+ err = -EEXIST;
+ goto out;
+ goto out_lock;
+ }
+ fist_copy_attr_timesizes(dir, hidden_sto_dir_dentry->d_inode);
-+
++
+ out_lock:
+ /* was: unlock_dir(hidden_sto_dir_dentry); */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+mini_fo_rmdir(inode_t *dir, dentry_t *dentry)
+{
+ int err = 0;
-+
++
+ dentry_t *hidden_sto_dentry;
+ dentry_t *hidden_sto_dir_dentry;
+ dentry_t *meta_dentry;
+#endif
+
+ /* Delete an old WOL file contained in the storage dir */
-+ meta_dentry = lookup_one_len(META_FILENAME,
-+ hidden_sto_dentry,
++ meta_dentry = lookup_one_len(META_FILENAME,
++ hidden_sto_dentry,
+ strlen(META_FILENAME));
+ if(meta_dentry->d_inode) {
+ err = vfs_unlink(hidden_sto_dentry->d_inode, meta_dentry);
+ dentry->d_inode->i_nlink = itohi2(dentry->d_inode)->i_nlink;
+
+ dput(dtohd(dentry));
-+
++
+ dtohd(dentry) = NULL;
+ dtopd(dentry)->state = DELETED;
+
+ /* carefull with R files */
-+ if( __meta_is_r_entry(dir,
-+ dentry->d_name.name,
++ if( __meta_is_r_entry(dir,
++ dentry->d_name.name,
+ dentry->d_name.len) == 1) {
-+ err = meta_remove_r_entry(dentry->d_parent,
++ err = meta_remove_r_entry(dentry->d_parent,
+ dentry->d_name.name,
+ dentry->d_name.len);
+ if(err) {
+ }
+ }
+ else {
-+ /* ok, add deleted file to META */
-+ meta_add_d_entry(dentry->d_parent,
-+ dentry->d_name.name,
++ /* ok, add deleted file to META */
++ meta_add_d_entry(dentry->d_parent,
++ dentry->d_name.name,
+ dentry->d_name.len);
+ }
+ /* was: unlock_dir(hidden_sto_dir_dentry); */
+ }
+ else if(dtopd(dentry)->state == UNMODIFIED) {
+ /* XXX: simply adding it to the delete list here is fscking dangerous!
-+ * as a temporary hack, i will disable rmdir on unmodified directories
++ * as a temporary hack, i will disable rmdir on unmodified directories
+ * for now.
+ */
+ err = -EINVAL;
+ err = -EINVAL;
+ goto out;
+ }
-+
++
+ /* dput base dentry, this will relase the inode and free the
+ * dentry, as we will never need it again. */
+ dput(dtohd(dentry));
+ dtopd(dentry)->state = DELETED;
+
+ /* add deleted file to META-file */
-+ meta_add_d_entry(dentry->d_parent,
-+ dentry->d_name.name,
++ meta_add_d_entry(dentry->d_parent,
++ dentry->d_name.name,
+ dentry->d_name.len);
+ goto out;
+ }
+#endif
+
+ /* Delete an old WOL file contained in the storage dir */
-+ meta_dentry = lookup_one_len(META_FILENAME,
-+ hidden_sto_dentry,
++ meta_dentry = lookup_one_len(META_FILENAME,
++ hidden_sto_dentry,
+ strlen(META_FILENAME));
+ if(meta_dentry->d_inode) {
+ /* is this necessary? dget(meta_dentry); */
-+ err = vfs_unlink(hidden_sto_dentry->d_inode,
++ err = vfs_unlink(hidden_sto_dentry->d_inode,
+ meta_dentry);
+ dput(meta_dentry);
+ if(!err)
+#endif
+
+ /* Delete an old WOL file contained in the storage dir */
-+ meta_dentry = lookup_one_len(META_FILENAME,
-+ hidden_sto_dentry,
++ meta_dentry = lookup_one_len(META_FILENAME,
++ hidden_sto_dentry,
+ strlen(META_FILENAME));
+ if(meta_dentry->d_inode) {
+ /* is this necessary? dget(meta_dentry); */
+ if(!err) {
+ d_drop(dentry);
+ }
-+
++
+ fist_copy_attr_times(dir, itohi2(dentry->d_parent->d_inode));
+ dput(dentry);
+
+ printk(KERN_CRIT "mini_fo_mknod: creating sto nod failed.\n");
+ err = -EINVAL;
+ }
-+
++
+ check_mini_fo_dentry(dentry);
+ return err;
+}
+ if(S_ISDIR(old_dentry->d_inode->i_mode))
+ return rename_directory(old_dir, old_dentry, new_dir, new_dentry);
+ return rename_nondir(old_dir, old_dentry, new_dir, new_dentry);
-+
++
+}
+
+int rename_directory(inode_t *old_dir, dentry_t *old_dentry,
+ uh, ah, new_dentry not negative.\n");
+ /* return -1; */
+ }
-+
++
+ /* state = UNMODIFIED */
+ if(dtopd(old_dentry)->state == UNMODIFIED) {
+ err = dir_unmod_to_mod(old_dentry);
-+ if (err)
++ if (err)
+ goto out;
+ }
+
+ /* state = MODIFIED */
+ if(dtopd(old_dentry)->state == MODIFIED) {
-+ bpath = meta_check_r_entry(old_dentry->d_parent,
++ bpath = meta_check_r_entry(old_dentry->d_parent,
+ old_dentry->d_name.name,
+ old_dentry->d_name.len);
+ if(bpath) {
+ kfree(bpath);
+ }
+ else {/* wol it */
-+ err = meta_add_d_entry(old_dentry->d_parent,
++ err = meta_add_d_entry(old_dentry->d_parent,
+ old_dentry->d_name.name,
+ old_dentry->d_name.len);
-+ if (err)
++ if (err)
+ goto out;
+ /* put it on rename list */
+ err = get_mini_fo_bpath(old_dentry,
-+ &bpath,
++ &bpath,
+ &bpath_len);
-+ if (err)
++ if (err)
+ goto out;
+ err = meta_add_r_entry(new_dentry->d_parent,
+ bpath, bpath_len,
+ new_dentry->d_name.name,
+ new_dentry->d_name.len);
-+ if (err)
++ if (err)
+ goto out;
+ }
+ /* no state change, MODIFIED stays MODIFIED */
+ dtopd(old_dentry)->state == DEL_REWRITTEN) {
+ if(dtohd(old_dentry))
+ dput(dtohd(old_dentry));
-+
++
+ if(dtopd(new_dentry)->state == DELETED) {
+ dtopd(old_dentry)->state = DEL_REWRITTEN;
+ dtohd(old_dentry) = NULL;
-+ }
++ }
+ else if(dtopd(new_dentry)->state == NON_EXISTANT) {
+ dtopd(old_dentry)->state = CREATED;
+ /* steal new dentry's neg. base dentry */
+ dtohd(old_dentry) = dtohd(new_dentry);
+ dtohd(new_dentry) = NULL;
+ }
-+ }
++ }
+ if(dtopd(new_dentry)->state == UNMODIFIED ||
+ dtopd(new_dentry)->state == NON_EXISTANT) {
+ err = get_neg_sto_dentry(new_dentry);
+ if(err)
+ goto out;
+ }
-+
++
+ /* now move sto file */
+ hidden_old_dentry = dtohd2(old_dentry);
+ hidden_new_dentry = dtohd2(new_dentry);
-+
++
+ dget(hidden_old_dentry);
+ dget(hidden_new_dentry);
-+
++
+ hidden_old_dir_dentry = dget(hidden_old_dentry->d_parent);
+ hidden_new_dir_dentry = dget(hidden_new_dentry->d_parent);
+ double_lock(hidden_old_dir_dentry, hidden_new_dir_dentry);
-+
++
+ err = vfs_rename(hidden_old_dir_dentry->d_inode, hidden_old_dentry,
+ hidden_new_dir_dentry->d_inode, hidden_new_dentry);
+ if(err)
+ goto out_lock;
-+
++
+ fist_copy_attr_all(new_dir, hidden_new_dir_dentry->d_inode);
+ if (new_dir != old_dir)
-+ fist_copy_attr_all(old_dir,
++ fist_copy_attr_all(old_dir,
+ hidden_old_dir_dentry->d_inode);
-+
++
+ out_lock:
+ /* double_unlock will dput the new/old parent dentries
+ * whose refcnts were incremented via get_parent above. */
+ double_unlock(hidden_old_dir_dentry, hidden_new_dir_dentry);
+ dput(hidden_new_dentry);
+ dput(hidden_old_dentry);
-+
++
+ out:
+ return err;
+}
+
+ /* the easy states */
+ if(exists_in_storage(old_dentry)) {
-+
++
+ dentry_t *hidden_old_dentry;
+ dentry_t *hidden_new_dentry;
+ dentry_t *hidden_old_dir_dentry;
+
+ /* we keep the neg. base dentry (if exists) */
+ dtohd(old_dentry) = dtohd(new_dentry);
-+ /* ...and set it to Null, or we'll get
++ /* ...and set it to Null, or we'll get
+ * Dr. dcache.c:345 if it gets dput twice... */
+ dtohd(new_dentry) = NULL;
+ dtopd(old_dentry)->state = CREATED;
+ dtopd(old_dentry)->state = DEL_REWRITTEN;
+ }
+ else { /* not possible, uhh, ahh */
-+ printk(KERN_CRIT
++ printk(KERN_CRIT
+ "mini_fo: rename_reg_file: invalid state detected [1].\n");
+ return -1;
+ }
-+
++
+ /* now we definitely have a sto file */
+ hidden_old_dentry = dtohd2(old_dentry);
+ hidden_new_dentry = dtohd2(new_dentry);
+
+ dget(hidden_old_dentry);
+ dget(hidden_new_dentry);
-+
++
+ hidden_old_dir_dentry = dget(hidden_old_dentry->d_parent);
+ hidden_new_dir_dentry = dget(hidden_new_dentry->d_parent);
+ double_lock(hidden_old_dir_dentry, hidden_new_dir_dentry);
+
-+ err = vfs_rename(hidden_old_dir_dentry->d_inode,
++ err = vfs_rename(hidden_old_dir_dentry->d_inode,
+ hidden_old_dentry,
-+ hidden_new_dir_dentry->d_inode,
++ hidden_new_dir_dentry->d_inode,
+ hidden_new_dentry);
-+ if(err)
++ if(err)
+ goto out_lock;
+
+ fist_copy_attr_all(new_dir, hidden_new_dir_dentry->d_inode);
+ if (new_dir != old_dir)
+ fist_copy_attr_all(old_dir, hidden_old_dir_dentry->d_inode);
-+
++
+ out_lock:
-+ /* double_unlock will dput the new/old parent dentries
++ /* double_unlock will dput the new/old parent dentries
+ * whose refcnts were incremented via get_parent above.
+ */
+ double_unlock(hidden_old_dir_dentry, hidden_new_dir_dentry);
+ dput(hidden_new_dentry);
+ dput(hidden_old_dentry);
-+ out:
++ out:
+ return err;
+ }
+ else { /* invalid state */
+ * if (err)
+ * goto out;
+ */
-+
++
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+ err = permission(hidden_inode, mask, nd);
+#else
+ err = permission(hidden_inode, mask);
+#endif
-+
++
+ /* out: */
+ return err;
+}
+ int err = 0;
+
+ check_mini_fo_dentry(dentry);
-+
++
+ if(!is_mini_fo_existant(dentry)) {
+ printk(KERN_CRIT "mini_fo_setattr: ERROR, invalid state detected [1].\n");
+ goto out;
+ err = dir_unmod_to_mod(dentry);
+ } else {
+ /* we copy contents if file is not beeing truncated */
-+ if(S_ISREG(dentry->d_inode->i_mode) &&
++ if(S_ISREG(dentry->d_inode->i_mode) &&
+ !(ia->ia_size == 0 && (ia->ia_valid & ATTR_SIZE))) {
+ err = nondir_unmod_to_mod(dentry, 1);
+ } else
+ ASSERT(dtohd2(dentry));
+ ASSERT(itopd(dentry->d_inode));
+ ASSERT(itohi2(dentry->d_inode));
-+
++
+ err = notify_change(dtohd2(dentry), ia);
+ fist_copy_attr_all(dentry->d_inode, itohi2(dentry->d_inode));
+ out:
+ hidden_dentry = dtohd2(dentry);
+ else
+ hidden_dentry = dtohd(dentry);
-+
++
+ ASSERT(hidden_dentry);
+ ASSERT(hidden_dentry->d_inode);
+ ASSERT(hidden_dentry->d_inode->i_op);
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,21) \
+ && LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,23)) \
+ || LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
-+mini_fo_setxattr(struct dentry *dentry, const char *name,
++mini_fo_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+#else
-+mini_fo_setxattr(struct dentry *dentry, const char *name,
++mini_fo_setxattr(struct dentry *dentry, const char *name,
+ void *value, size_t size, int flags)
+#endif
+
+ hidden_dentry = dtohd2(dentry);
+ else
+ hidden_dentry = dtohd(dentry);
-+
++
+ ASSERT(hidden_dentry);
+ ASSERT(hidden_dentry->d_inode);
+ ASSERT(hidden_dentry->d_inode->i_op);
+ hidden_dentry = dtohd2(dentry);
+ else
+ hidden_dentry = dtohd(dentry);
-+
++
+ ASSERT(hidden_dentry);
+ ASSERT(hidden_dentry->d_inode);
+ ASSERT(hidden_dentry->d_inode->i_op);
+ /*
+ * original: inode = iget(sb, hidden_inode->i_ino);
+ */
-+ inode = iget_locked(sb, iunique(sb, 25));
++ inode = iget(sb, iunique(sb, 25));
+ if (!inode) {
+ err = -EACCES; /* should be impossible??? */
+ goto out;
+{
+ dentry_t *hidden_root = ERR_PTR(-EINVAL);
+ dentry_t *hidden_root2 = ERR_PTR(-EINVAL);
-+ struct nameidata nd, nd2;
++ struct nameidata nd, nd2;
+ char *name, *tmp, *end;
+ int err = 0;
+
+ hidden_root = ERR_PTR(err);
+ goto out;
+ }
-+ hidden_root = nd.path.dentry;
-+ stopd(sb)->base_dir_dentry = nd.path.dentry;
-+ stopd(sb)->hidden_mnt = nd.path.mnt;
++ hidden_root = nd.dentry;
++ stopd(sb)->base_dir_dentry = nd.dentry;
++ stopd(sb)->hidden_mnt = nd.mnt;
+
+ } else if(!strncmp("sto=", options, 4)) {
+ /* parse the storage dir */
+ hidden_root2 = ERR_PTR(err);
+ goto out;
+ }
-+ hidden_root2 = nd2.path.dentry;
-+ stopd(sb)->storage_dir_dentry = nd2.path.dentry;
-+ stopd(sb)->hidden_mnt2 = nd2.path.mnt;
++ hidden_root2 = nd2.dentry;
++ stopd(sb)->storage_dir_dentry = nd2.dentry;
++ stopd(sb)->hidden_mnt2 = nd2.mnt;
+ stohs2(sb) = hidden_root2->d_sb;
+
-+ /* validate storage dir, this is done in
++ /* validate storage dir, this is done in
+ * mini_fo_read_super for the base directory.
+ */
+ if (IS_ERR(hidden_root2)) {
+ sb->s_root->d_parent = sb->s_root;
+
+ /* link the upper and lower dentries */
-+ __dtopd(sb->s_root) = (struct mini_fo_dentry_info *)
++ __dtopd(sb->s_root) = (struct mini_fo_dentry_info *)
+ kmalloc(sizeof(struct mini_fo_dentry_info), GFP_KERNEL);
+ if (!dtopd(sb->s_root)) {
+ err = -ENOMEM;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
+static int mini_fo_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
-+ void *raw_data, struct vfsmount *mnt)
++ void *raw_data, struct vfsmount *mnt)
+{
+ return get_sb_nodev(fs_type, flags, raw_data, mini_fo_read_super, mnt);
+}
+#else
+static struct super_block *mini_fo_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
-+ void *raw_data)
++ void *raw_data)
+{
+ return get_sb_nodev(fs_type, flags, raw_data, mini_fo_read_super);
+}
+#include "fist.h"
+#include "mini_fo.h"
+
-+int meta_build_lists(dentry_t *dentry)
++int meta_build_lists(dentry_t *dentry)
+{
+ struct mini_fo_inode_info *inode_info;
+
+ /* might there be a META-file? */
+ if(dtohd2(dentry) && dtohd2(dentry)->d_inode) {
+ meta_dentry = lookup_one_len(META_FILENAME,
-+ dtohd2(dentry),
++ dtohd2(dentry),
+ strlen(META_FILENAME));
+ if(!meta_dentry->d_inode) {
+ dput(meta_dentry);
+ /* $%& err, is this correct? */
+ meta_mnt = stopd(dentry->d_inode->i_sb)->hidden_mnt2;
+ mntget(meta_mnt);
-+
++
+
+ /* open META-file for reading */
+ meta_file = dentry_open(meta_dentry, meta_mnt, 0x0);
+ switch (*entry) {
+ case 'D':
+ /* format: "D filename" */
-+ meta_list_add_d_entry(dentry,
-+ entry+2,
++ meta_list_add_d_entry(dentry,
++ entry+2,
+ len-2);
+ break;
+ case 'R':
+ dir_name = strchr(old_path, ' ') + 1;
+ old_len = dir_name - old_path - 1;
+ new_len = ((int) entry) + len - ((int ) dir_name);
-+ meta_list_add_r_entry(dentry,
-+ old_path,
++ meta_list_add_r_entry(dentry,
++ old_path,
+ old_len,
-+ dir_name,
++ dir_name,
+ new_len);
+ break;
+ default:
+ dput(meta_dentry);
+ return -1;
+ out_ok:
-+ return 1; /* check this!!! inode_info->wol_size; */
++ return 1; /* check this!!! inode_info->wol_size; */
+}
+
+/* cleanups up all lists and free's the mem by dentry */
-+int meta_put_lists(dentry_t *dentry)
++int meta_put_lists(dentry_t *dentry)
+{
+ if(!dentry || !dentry->d_inode) {
+ printk("mini_fo: meta_put_lists: invalid dentry passed.\n");
+}
+
+/* cleanups up all lists and free's the mem by inode */
-+int __meta_put_lists(inode_t *inode)
++int __meta_put_lists(inode_t *inode)
+{
+ int err = 0;
+ if(!inode || !itopd(inode)) {
+
+
+/* remove all D entries from the renamed list and free the mem */
-+int __meta_put_d_list(inode_t *inode)
++int __meta_put_d_list(inode_t *inode)
+{
+ struct list_head *tmp;
+ struct deleted_entry *del_entry;
+ struct mini_fo_inode_info *inode_info;
-+
++
+ if(!inode || !itopd(inode)) {
+ printk(KERN_CRIT "mini_fo: __meta_put_d_list: \
+ invalid inode passed.\n");
+ return -1;
+ }
+ inode_info = itopd(inode);
-+
++
+ /* nuke the DELETED-list */
+ if(inode_info->deleted_list_size <= 0)
+ return 0;
+ kfree(del_entry);
+ }
+ inode_info->deleted_list_size = 0;
-+
++
+ return 0;
+}
+
+/* remove all R entries from the renamed list and free the mem */
-+int __meta_put_r_list(inode_t *inode)
++int __meta_put_r_list(inode_t *inode)
+{
+ struct list_head *tmp;
+ struct renamed_entry *ren_entry;
+ struct mini_fo_inode_info *inode_info;
-+
++
+ if(!inode || !itopd(inode)) {
+ printk(KERN_CRIT "mini_fo: meta_put_r_list: invalid inode.\n");
+ return -1;
+ }
+ inode_info = itopd(inode);
-+
++
+ /* nuke the RENAMED-list */
-+ if(inode_info->renamed_list_size <= 0)
++ if(inode_info->renamed_list_size <= 0)
+ return 0;
+
+ while(!list_empty(&inode_info->renamed_list)) {
+ kfree(ren_entry);
+ }
+ inode_info->renamed_list_size = 0;
-+
++
+ return 0;
+}
+
+ int err = 0;
+ err = meta_list_add_d_entry(dentry, name, len);
+ err |= meta_write_d_entry(dentry,name,len);
-+ return err;
++ return err;
+}
+
+/* add a D entry to the deleted list */
-+int meta_list_add_d_entry(dentry_t *dentry, const char *name, int len)
++int meta_list_add_d_entry(dentry_t *dentry, const char *name, int len)
+{
+ struct deleted_entry *del_entry;
+ struct mini_fo_inode_info *inode_info;
+ if(inode_info->deleted_list_size < 0)
+ return -1;
+
-+ del_entry = (struct deleted_entry *)
++ del_entry = (struct deleted_entry *)
+ kmalloc(sizeof(struct deleted_entry), GFP_KERNEL);
+ del_entry->name = (char*) kmalloc(len, GFP_KERNEL);
+ if(!del_entry || !del_entry->name) {
+ return 0;
+}
+
-+int meta_add_r_entry(dentry_t *dentry,
-+ const char *old_name, int old_len,
++int meta_add_r_entry(dentry_t *dentry,
++ const char *old_name, int old_len,
+ const char *new_name, int new_len)
+{
+ int err = 0;
-+ err = meta_list_add_r_entry(dentry,
++ err = meta_list_add_r_entry(dentry,
+ old_name, old_len,
+ new_name, new_len);
+ err |= meta_write_r_entry(dentry,
+}
+
+/* add a R entry to the renamed list */
-+int meta_list_add_r_entry(dentry_t *dentry,
-+ const char *old_name, int old_len,
++int meta_list_add_r_entry(dentry_t *dentry,
++ const char *old_name, int old_len,
+ const char *new_name, int new_len)
+{
+ struct renamed_entry *ren_entry;
+ if(inode_info->renamed_list_size < 0)
+ return -1;
+
-+ ren_entry = (struct renamed_entry *)
++ ren_entry = (struct renamed_entry *)
+ kmalloc(sizeof(struct renamed_entry), GFP_KERNEL);
+ ren_entry->old_name = (char*) kmalloc(old_len, GFP_KERNEL);
+ ren_entry->new_name = (char*) kmalloc(new_len, GFP_KERNEL);
+{
+ int err = 0;
+ if(!dentry || !dentry->d_inode) {
-+ printk(KERN_CRIT
++ printk(KERN_CRIT
+ "mini_fo: meta_remove_r_entry: \
+ invalid dentry passed.\n");
+ return -1;
+int meta_list_remove_r_entry(dentry_t *dentry, const char *name, int len)
+{
+ if(!dentry || !dentry->d_inode) {
-+ printk(KERN_CRIT
++ printk(KERN_CRIT
+ "mini_fo: meta_list_remove_r_entry: \
+ invalid dentry passed.\n");
+ return -1;
+ struct mini_fo_inode_info *inode_info;
+
+ if(!inode || !itopd(inode))
-+ printk(KERN_CRIT
++ printk(KERN_CRIT
+ "mini_fo: __meta_list_remove_r_entry: \
+ invalid inode passed.\n");
+ inode_info = itopd(inode);
+ return -1;
+ if(inode_info->renamed_list_size == 0)
+ return 1;
-+
++
+ list_for_each(tmp, &inode_info->renamed_list) {
+ ren_entry = list_entry(tmp, struct renamed_entry, list);
+ if(ren_entry->new_len != len)
+ continue;
-+
++
+ if(!strncmp(ren_entry->new_name, name, len)) {
+ list_del(tmp);
+ kfree(ren_entry->new_name);
+
+
+/* append a single D entry to the meta file */
-+int meta_write_d_entry(dentry_t *dentry, const char *name, int len)
++int meta_write_d_entry(dentry_t *dentry, const char *name, int len)
+{
+ dentry_t *meta_dentry = 0;
+ file_t *meta_file = 0;
+ goto out;
+ }
+ }
-+ meta_dentry = lookup_one_len(META_FILENAME,
++ meta_dentry = lookup_one_len(META_FILENAME,
+ dtohd2(dentry), strlen (META_FILENAME));
+
+ /* We need to create a META-file */
+ if(!meta_dentry->d_inode) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+ vfs_create(dtohd2(dentry)->d_inode,
-+ meta_dentry,
++ meta_dentry,
+ S_IRUSR | S_IWUSR,
+ NULL);
+#else
+ vfs_create(dtohd2(dentry)->d_inode,
-+ meta_dentry,
++ meta_dentry,
+ S_IRUSR | S_IWUSR);
+#endif
+ }
+ out of mem.\n");
+ return -ENOMEM;
+ }
-+
++
+ buf[0] = 'D';
+ buf[1] = ' ';
+ strncpy(buf+2, name, len);
+ buf[len+2] = '\n';
-+ bytes = meta_file->f_op->write(meta_file, buf, len+3,
++ bytes = meta_file->f_op->write(meta_file, buf, len+3,
+ &meta_file->f_pos);
+ if(bytes != len+3) {
+ printk(KERN_CRIT "mini_fo: meta_write_d_entry: \
+}
+
+/* append a single R entry to the meta file */
-+int meta_write_r_entry(dentry_t *dentry,
-+ const char *old_name, int old_len,
-+ const char *new_name, int new_len)
++int meta_write_r_entry(dentry_t *dentry,
++ const char *old_name, int old_len,
++ const char *new_name, int new_len)
+{
+ dentry_t *meta_dentry = 0;
+ file_t *meta_file = 0;
+ goto out;
+ }
+ }
-+ meta_dentry = lookup_one_len(META_FILENAME,
-+ dtohd2(dentry),
++ meta_dentry = lookup_one_len(META_FILENAME,
++ dtohd2(dentry),
+ strlen (META_FILENAME));
+ if(!meta_dentry->d_inode) {
+ /* We need to create a META-file */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-+ vfs_create(dtohd2(dentry)->d_inode,
++ vfs_create(dtohd2(dentry)->d_inode,
+ meta_dentry, S_IRUSR | S_IWUSR, NULL);
+#else
-+ vfs_create(dtohd2(dentry)->d_inode,
++ vfs_create(dtohd2(dentry)->d_inode,
+ meta_dentry, S_IRUSR | S_IWUSR);
+#endif
+ }
+ printk(KERN_CRIT "mini_fo: meta_write_r_entry: out of mem.\n");
+ return -ENOMEM;
+ }
-+
++
+ buf[0] = 'R';
+ buf[1] = ' ';
+ strncpy(buf + 2, old_name, old_len);
+ printk(KERN_CRIT "mini_fo: meta_write_r_entry: ERROR writing.\n");
+ err = -1;
+ }
-+
++
+ kfree(buf);
+ set_fs(old_fs);
+
+ dentry_t *meta_dentry;
+ file_t *meta_file;
+ mm_segment_t old_fs;
-+
++
+ int bytes, err;
+ struct vfsmount *meta_mnt;
+ char *buf;
+ err = 0;
+ meta_file=0;
+ meta_mnt=0;
-+
++
+ if(!dentry || !dentry->d_inode) {
+ printk(KERN_CRIT "mini_fo: meta_sync_d_list: \
+ invalid inode passed.\n");
+ goto out;
+ }
+ inode_info = itopd(dentry->d_inode);
-+
++
+ if(inode_info->deleted_list_size < 0) {
+ err = -1;
+ goto out;
+ }
-+
++
+ /* ok, there is something to sync */
+
+ /* build the storage structure? */
+ goto out;
+ }
+ }
-+ meta_dentry = lookup_one_len(META_FILENAME,
-+ dtohd2(dentry),
++ meta_dentry = lookup_one_len(META_FILENAME,
++ dtohd2(dentry),
+ strlen(META_FILENAME));
+ if(!meta_dentry->d_inode) {
+ /* We need to create a META-file */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-+ vfs_create(dtohd2(dentry)->d_inode,
++ vfs_create(dtohd2(dentry)->d_inode,
+ meta_dentry, S_IRUSR | S_IWUSR, NULL);
+#else
-+ vfs_create(dtohd2(dentry)->d_inode,
++ vfs_create(dtohd2(dentry)->d_inode,
+ meta_dentry, S_IRUSR | S_IWUSR);
+#endif
+ app_flag = 0;
+ printk(KERN_CRIT "mini_fo: meta_sync_d_list: \
+ ERROR opening meta file.\n");
+ /* we don't mntget so we dont't mntput (for now)
-+ * mntput(meta_mnt);
++ * mntput(meta_mnt);
+ */
+ dput(meta_dentry);
+ err = -1;
+ ERROR, fs does not support writing.\n");
+ goto out_err_close;
+ }
-+
++
+ meta_file->f_pos = meta_dentry->d_inode->i_size; /* append */
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ /* here we go... */
+ list_for_each(tmp, &inode_info->deleted_list) {
+ del_entry = list_entry(tmp, struct deleted_entry, list);
-+
++
+ /* size: len for name, 1 for \n and 2 for "D " */
+ buf = (char *) kmalloc(del_entry->len+3, GFP_KERNEL);
+ if (!buf) {
+ out of mem.\n");
+ return -ENOMEM;
+ }
-+
++
+ buf[0] = 'D';
+ buf[1] = ' ';
+ strncpy(buf+2, del_entry->name, del_entry->len);
+ buf[del_entry->len+2] = '\n';
-+ bytes = meta_file->f_op->write(meta_file, buf,
-+ del_entry->len+3,
++ bytes = meta_file->f_op->write(meta_file, buf,
++ del_entry->len+3,
+ &meta_file->f_pos);
+ if(bytes != del_entry->len+3) {
+ printk(KERN_CRIT "mini_fo: meta_sync_d_list: \
+ kfree(buf);
+ }
+ set_fs(old_fs);
-+
++
+ out_err_close:
+ fput(meta_file);
+ out:
+ dentry_t *meta_dentry;
+ file_t *meta_file;
+ mm_segment_t old_fs;
-+
++
+ int bytes, err, buf_len;
+ struct vfsmount *meta_mnt;
+ char *buf;
-+
++
+ struct list_head *tmp;
+ struct renamed_entry *ren_entry;
+ struct mini_fo_inode_info *inode_info;
-+
++
+ err = 0;
+ meta_file=0;
+ meta_mnt=0;
-+
++
+ if(!dentry || !dentry->d_inode) {
+ printk(KERN_CRIT "mini_fo: meta_sync_r_list: \
+ invalid dentry passed.\n");
+ goto out;
+ }
+ inode_info = itopd(dentry->d_inode);
-+
++
+ if(inode_info->deleted_list_size < 0) {
+ err = -1;
+ goto out;
+ }
-+
++
+ /* ok, there is something to sync */
+
+ /* build the storage structure? */
+ goto out;
+ }
+ }
-+ meta_dentry = lookup_one_len(META_FILENAME,
-+ dtohd2(dentry),
++ meta_dentry = lookup_one_len(META_FILENAME,
++ dtohd2(dentry),
+ strlen(META_FILENAME));
+ if(!meta_dentry->d_inode) {
+ /* We need to create a META-file */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-+ vfs_create(dtohd2(dentry)->d_inode,
++ vfs_create(dtohd2(dentry)->d_inode,
+ meta_dentry, S_IRUSR | S_IWUSR, NULL);
+#else
-+ vfs_create(dtohd2(dentry)->d_inode,
++ vfs_create(dtohd2(dentry)->d_inode,
+ meta_dentry, S_IRUSR | S_IWUSR);
+#endif
+ app_flag = 0;
+ printk(KERN_CRIT "mini_fo: meta_sync_r_list: \
+ ERROR opening meta file.\n");
+ /* we don't mntget so we dont't mntput (for now)
-+ * mntput(meta_mnt);
++ * mntput(meta_mnt);
+ */
+ dput(meta_dentry);
+ err = -1;
+ ERROR, fs does not support writing.\n");
+ goto out_err_close;
+ }
-+
++
+ meta_file->f_pos = meta_dentry->d_inode->i_size; /* append */
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ /* here we go... */
+ list_for_each(tmp, &inode_info->renamed_list) {
+ ren_entry = list_entry(tmp, struct renamed_entry, list);
-+ /* size:
++ /* size:
+ * 2 for "R ", old_len+new_len for names, 1 blank+1 \n */
+ buf_len = ren_entry->old_len + ren_entry->new_len + 4;
+ buf = (char *) kmalloc(buf_len, GFP_KERNEL);
+ buf[1] = ' ';
+ strncpy(buf + 2, ren_entry->old_name, ren_entry->old_len);
+ buf[ren_entry->old_len + 2] = ' ';
-+ strncpy(buf + ren_entry->old_len + 3,
++ strncpy(buf + ren_entry->old_len + 3,
+ ren_entry->new_name, ren_entry->new_len);
+ buf[buf_len - 1] = '\n';
-+ bytes = meta_file->f_op->write(meta_file, buf,
++ bytes = meta_file->f_op->write(meta_file, buf,
+ buf_len, &meta_file->f_pos);
+ if(bytes != buf_len) {
+ printk(KERN_CRIT "mini_fo: meta_sync_r_list: \
+ ERROR writing.\n");
+ err |= -1;
-+ }
++ }
+ kfree(buf);
+ }
+ set_fs(old_fs);
-+
++
+ out_err_close:
+ fput(meta_file);
+ out:
+ return err;
+}
+
-+int meta_check_d_entry(dentry_t *dentry, const char *name, int len)
++int meta_check_d_entry(dentry_t *dentry, const char *name, int len)
+{
+ if(!dentry || !dentry->d_inode)
+ printk(KERN_CRIT "mini_fo: meta_check_d_dentry: \
+ invalid dentry passed.\n");
-+ return __meta_check_d_entry(dentry->d_inode, name, len);
++ return __meta_check_d_entry(dentry->d_inode, name, len);
+}
+
-+int __meta_check_d_entry(inode_t *inode, const char *name, int len)
++int __meta_check_d_entry(inode_t *inode, const char *name, int len)
+{
+ struct list_head *tmp;
+ struct deleted_entry *del_entry;
+ invalid inode passed.\n");
+
+ inode_info = itopd(inode);
-+
++
+ if(inode_info->deleted_list_size <= 0)
+ return 0;
+
+ del_entry = list_entry(tmp, struct deleted_entry, list);
+ if(del_entry->len != len)
+ continue;
-+
++
+ if(!strncmp(del_entry->name, name, len))
+ return 1;
+ }
+ return 0;
+}
+
-+/*
++/*
+ * check if file has been renamed and return path to orig. base dir.
+ * Implements no error return values so far, what of course sucks.
+ * String is null terminated.'
+ */
-+char* meta_check_r_entry(dentry_t *dentry, const char *name, int len)
++char* meta_check_r_entry(dentry_t *dentry, const char *name, int len)
+{
+ if(!dentry || !dentry->d_inode) {
+ printk(KERN_CRIT "mini_fo: meta_check_r_dentry: \
+ invalid dentry passed.\n");
+ return NULL;
+ }
-+ return __meta_check_r_entry(dentry->d_inode, name, len);
++ return __meta_check_r_entry(dentry->d_inode, name, len);
+}
+
+char* __meta_check_r_entry(inode_t *inode, const char *name, int len)
+ struct renamed_entry *ren_entry;
+ struct mini_fo_inode_info *inode_info;
+ char *old_path;
-+
++
+ if(!inode || !itopd(inode)) {
+ printk(KERN_CRIT "mini_fo: meta_check_r_dentry: \
+ invalid inode passed.\n");
+ return NULL;
+ }
+ inode_info = itopd(inode);
-+
++
+ if(inode_info->renamed_list_size <= 0)
+ return NULL;
-+
++
+ list_for_each(tmp, &inode_info->renamed_list) {
+ ren_entry = list_entry(tmp, struct renamed_entry, list);
+ if(ren_entry->new_len != len)
+ continue;
-+
++
+ if(!strncmp(ren_entry->new_name, name, len)) {
-+ old_path = (char *)
++ old_path = (char *)
+ kmalloc(ren_entry->old_len+1, GFP_KERNEL);
-+ strncpy(old_path,
-+ ren_entry->old_name,
++ strncpy(old_path,
++ ren_entry->old_name,
+ ren_entry->old_len);
+ old_path[ren_entry->old_len]='\0';
+ return old_path;
+ * 0 if not,
+ * -1 if error.
+ */
-+int meta_is_r_entry(dentry_t *dentry, const char *name, int len)
++int meta_is_r_entry(dentry_t *dentry, const char *name, int len)
+{
+ if(!dentry || !dentry->d_inode) {
+ printk(KERN_CRIT "mini_fo: meta_check_r_dentry [2]: \
+ invalid dentry passed.\n");
+ return -1;
+ }
-+ return __meta_is_r_entry(dentry->d_inode, name, len);
++ return __meta_is_r_entry(dentry->d_inode, name, len);
+}
+
+int __meta_is_r_entry(inode_t *inode, const char *name, int len)
+ struct list_head *tmp;
+ struct renamed_entry *ren_entry;
+ struct mini_fo_inode_info *inode_info;
-+
++
+ if(!inode || !itopd(inode)) {
+ printk(KERN_CRIT "mini_fo: meta_check_r_dentry [2]: \
+ invalid inode passed.\n");
+ return -1;
+ }
+ inode_info = itopd(inode);
-+
++
+ if(inode_info->renamed_list_size <= 0)
+ return -1;
-+
++
+ list_for_each(tmp, &inode_info->renamed_list) {
+ ren_entry = list_entry(tmp, struct renamed_entry, list);
+ if(ren_entry->new_len != len)
+ continue;
-+
-+ if(!strncmp(ren_entry->new_name, name, len))
++
++ if(!strncmp(ren_entry->new_name, name, len))
+ return 1;
+ }
+ return 0;
+# define __ftopd(file) ((file)->private_data)
+/* file TO hidden_file */
+# define ftohf(file) ((ftopd(file))->wfi_file)
-+# define ftohf2(file) ((ftopd(file))->wfi_file2)
++# define ftohf2(file) ((ftopd(file))->wfi_file2)
+
+/* inode TO private_data */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
+/* misc stuff */
+extern int mini_fo_tri_interpose(dentry_t *hidden_dentry,
+ dentry_t *hidden_sto_dentry,
-+ dentry_t *dentry,
++ dentry_t *dentry,
+ super_block_t *sb, int flag);
+
+extern int mini_fo_cp_cont(dentry_t *tgt_dentry, struct vfsmount *tgt_mnt,
+extern int __meta_put_lists(inode_t *inode);
+
+extern int meta_add_d_entry(dentry_t *dentry, const char *name, int len);
-+extern int meta_add_r_entry(dentry_t *dentry,
-+ const char *old_name, int old_len,
++extern int meta_add_r_entry(dentry_t *dentry,
++ const char *old_name, int old_len,
+ const char *new_name, int new_len);
+
+extern int meta_remove_r_entry(dentry_t *dentry, const char *name, int len);
+extern int __meta_put_d_list(inode_t *inode);
+extern int __meta_put_r_list(inode_t *inode);
+
-+extern int meta_list_add_d_entry(dentry_t *dentry,
++extern int meta_list_add_d_entry(dentry_t *dentry,
+ const char *name, int len);
-+extern int meta_list_add_r_entry(dentry_t *dentry,
-+ const char *old_name, int old_len,
++extern int meta_list_add_r_entry(dentry_t *dentry,
++ const char *old_name, int old_len,
+ const char *new_name, int new_len);
+
-+extern int meta_list_remove_r_entry(dentry_t *dentry,
++extern int meta_list_remove_r_entry(dentry_t *dentry,
+ const char *name, int len);
+
-+extern int __meta_list_remove_r_entry(inode_t *inode,
++extern int __meta_list_remove_r_entry(inode_t *inode,
+ const char *name, int len);
+
+extern int meta_write_d_entry(dentry_t *dentry, const char *name, int len);
-+extern int meta_write_r_entry(dentry_t *dentry,
-+ const char *old_name, int old_len,
++extern int meta_write_r_entry(dentry_t *dentry,
++ const char *old_name, int old_len,
+ const char *new_name, int new_len);
+
+extern int meta_sync_lists(dentry_t *dentry);
+/* ndl stuff */
+extern int ndl_add_entry(struct readdir_data *rd, const char *name, int len);
+extern void ndl_put_list(struct readdir_data *rd);
-+extern int ndl_check_entry(struct readdir_data *rd,
++extern int ndl_check_entry(struct readdir_data *rd,
+ const char *name, int len);
+
+
+# storage dir: $STO
+# meta filename: $META_NAME
+# dry run: $DRYRUN
-+# verbose: $VERBOSE
++# verbose: $VERBOSE
+# tmp files: $TMP
+###############################################################################
+
+# first process all renamed dirs
+echo "Merging renamed directories..."
+pushd $STO &> /dev/null
-+find . -name $META_NAME -type f -print0 | xargs -0 -e grep -e '^R ' | tr -s ':R' ' ' | while read ENTRY; do
++find . -name $META_NAME -type f -print0 | xargs -0 -e grep -e '^R ' | tr -s ':R' ' ' | while read ENTRY; do
+ echo "entry: $ENTRY"
+ META_FILE=`echo $ENTRY | cut -d ' ' -f 1`
+ OLD_B_DIR=`echo $ENTRY | cut -d ' ' -f 2 | sed -e 's/\///'`
+
+# delete all whiteouted files from base
+echo -e "\nDeleting whiteout'ed files from base file system..."
-+find . -name $META_NAME -type f -print0 | xargs -0 -e grep -e '^D ' | sed -e 's/:D//' | while read ENTRY; do
++find . -name $META_NAME -type f -print0 | xargs -0 -e grep -e '^D ' | sed -e 's/:D//' | while read ENTRY; do
+ META_FILE=`echo $ENTRY | cut -d ' ' -f 1`
+ DEL_NAME=`echo $ENTRY | cut -d ' ' -f 2`
+ DEL_FILE=`echo $META_FILE | sed -e "s/$META_NAME/$DEL_NAME/" | sed -e 's/^\.\///'`
+ pushd $BASE #&> /dev/null
+ COMMAND="cp -df $STO/$FILE $BASE/$FILE"; exec_command
+ popd &> /dev/null
-+ done
++ done
+done
+popd &> /dev/null
+
-+#rm $TMP/$SKIP_DEL_LIST
++#rm $TMP/$SKIP_DEL_LIST
+
+echo "Done!"
Index: linux-2.6.23/fs/mini_fo/mini_fo-overlay
+STO_DIR="/tmp"
+BASE=
+
-+usage()
++usage()
+{
+cat <<EOF
+
+Version 0.1
+
+This script overlays the given base directory using the mini_fo file
-+system. If only the base directory base_dir is given, $0
++system. If only the base directory base_dir is given, $0
+will use a storage directory called "sto-<base_dir_name>" in $STO_DIR,
+and mount point "mini_fo-<base_dir_dir>" in $MNT_DIR.
+
+ exit -1
+fi
+
-+# fix suffix
++# fix suffix
+if [ "x$SUFF" != "x" ]; then
+ SUFF="-$SUFF"
+fi
+ exit -1
+fi
+
-+# mount
++# mount
+mount -t mini_fo -o base=$BASE,sto=$STO $BASE $MNTP
+
+if [ $? -ne 0 ]; then
+on it:
+
+load the module (as root)
-+
++
+ # insmod mini_fo.o for a 2.4 kernel or
-+
++
+ # insmod mini_fo.ko for a 2.6 kernel
+
+
+
+v0-5-10-pre5:
+
-+- implemented directory deleting
++- implemented directory deleting
+- made parsing of mount options more stable
+- New format of mount options! (See README)
+- I can't reproduce the unknown panic with 2.4.25 anymore, so I'll
+Implemented features:
+---------------------
+
-+- creating hard links (see BUGS on already existing hard links)
++- creating hard links (see BUGS on already existing hard links)
+- lightweight directory renaming
-+- renaming device files, pipes, sockets, etc.
-+- creating, renaming, deleting of special files
++- renaming device files, pipes, sockets, etc.
++- creating, renaming, deleting of special files
+- deleting directorys
+- general directory reading (simple "ls" )
+- creating files in existing directorys
+ printk(KERN_CRIT "mini_fo: create_sto_file: ERROR getting neg. sto dentry.\n");
+ goto out;
+ }
-+
++
+ dir = dentry->d_parent->d_inode;
+ hidden_sto_dentry = dtohd2(dentry);
+
+ }
+ itohi2(dentry->d_inode) = igrab(dtohd2(dentry)->d_inode);
+ }
-+ fist_copy_attr_timesizes(dentry->d_parent->d_inode,
++ fist_copy_attr_timesizes(dentry->d_parent->d_inode,
+ hidden_sto_dir_dentry->d_inode);
+
+ out_lock:
+ err = -EINVAL;
+ goto out;
+ }
-+
++
+ err = get_neg_sto_dentry(dentry);
+ if(err) {
+ err = -EINVAL;
+ err = PTR_ERR(hidden_sto_dir_dentry);
+ if (IS_ERR(hidden_sto_dir_dentry))
+ goto out;
-+
++
+ err = vfs_mkdir(hidden_sto_dir_dentry->d_inode,
+ hidden_sto_dentry,
+ mode);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-+int create_sto_nod(dentry_t *dentry, int mode, dev_t dev)
++int create_sto_nod(dentry_t *dentry, int mode, dev_t dev)
+#else
-+int create_sto_nod(dentry_t *dentry, int mode, int dev)
++int create_sto_nod(dentry_t *dentry, int mode, int dev)
+#endif
+{
+ int err = 0;
+ if (err) {
+ printk(KERN_CRIT "mini_fo: create_sto_nod: ERROR getting neg. sto dentry.\n");
+ goto out;
-+ }
++ }
+
+ dir = dentry->d_parent->d_inode;
+ hidden_sto_dentry = dtohd2(dentry);
-+
++
+ /* lock parent */
+ hidden_sto_dir_dentry = dget(hidden_sto_dentry->d_parent);
+
+#else
+ down(&hidden_sto_dir_dentry->d_inode->i_sem);
+#endif
-+
++
+ err = PTR_ERR(hidden_sto_dir_dentry);
+ if (IS_ERR(hidden_sto_dir_dentry))
+ goto out;
+}
+
+
-+/* unimplemented (and possibly not usefull):
++/* unimplemented (and possibly not usefull):
+
+ nondir-del_to_del_rew
+ nondir-non_exist_to_creat
+
+
+/* bring a file of any type from state UNMODIFIED to MODIFIED */
-+int nondir_unmod_to_mod(dentry_t *dentry, int cp_flag)
++int nondir_unmod_to_mod(dentry_t *dentry, int cp_flag)
+{
+ int err = 0;
+ struct vfsmount *tgt_mnt;
+ ERROR getting neg. sto dentry.\n");
+ goto out;
+ }
-+
++
+ /* create sto file */
+ hidden_sto_dentry = dtohd2(dentry);
+
+ dtohd(dentry)->d_inode->i_mode,
+ dtohd(dentry)->d_inode->i_rdev);
+ }
-+
++
+ else if(S_ISREG(dentry->d_inode->i_mode)) {
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+ }
+
+ itohi2(dentry->d_inode) = igrab(dtohd2(dentry)->d_inode);
-+
-+ fist_copy_attr_timesizes(dentry->d_parent->d_inode,
++
++ fist_copy_attr_timesizes(dentry->d_parent->d_inode,
+ hidden_sto_dir_dentry->d_inode);
+ dtost(dentry) = MODIFIED;
+
+ tgt_mnt = stopd(dentry->d_inode->i_sb)->hidden_mnt2;
+ src_dentry = dtohd(dentry);
+ src_mnt = stopd(dentry->d_inode->i_sb)->hidden_mnt;
-+
-+ err = mini_fo_cp_cont(tgt_dentry, tgt_mnt,
++
++ err = mini_fo_cp_cont(tgt_dentry, tgt_mnt,
+ src_dentry, src_mnt);
+ if(err) {
+ printk(KERN_CRIT "mini_fo: nondir_unmod_to_mod: \
+ ERROR copying contents.\n");
+ }
-+ goto out;
++ goto out;
+ }
+
+ out_lock:
+ return nondir_creat_to_del(dentry);
+}
+
-+int nondir_creat_to_del(dentry_t *dentry)
++int nondir_creat_to_del(dentry_t *dentry)
+{
+ int err = 0;
+
+ inode_t *hidden_sto_dir_inode;
+ dentry_t *hidden_sto_dir_dentry;
+ dentry_t *hidden_sto_dentry;
-+
++
+ check_mini_fo_dentry(dentry);
+
-+ /* for now this function serves for both state DEL_REWRITTEN and
++ /* for now this function serves for both state DEL_REWRITTEN and
+ * CREATED */
+ if(!(dtost(dentry) == CREATED || (dtost(dentry) == DEL_REWRITTEN)) ||
+ S_ISDIR(dentry->d_inode->i_mode)) {
+ err = -1;
+ goto out;
+ }
-+
++
+ hidden_sto_dir_inode = itohi2(dentry->d_parent->d_inode);
+ hidden_sto_dentry = dtohd2(dentry);
-+
++
+ /* was: hidden_sto_dir_dentry = lock_parent(hidden_sto_dentry);*/
+ hidden_sto_dir_dentry = dget(hidden_sto_dentry->d_parent);
+
+#else
+ down(&hidden_sto_dir_dentry->d_inode->i_sem);
+#endif
-+
++
+ /* avoid destroying the hidden inode if the file is in use */
+ dget(hidden_sto_dentry);
+ err = vfs_unlink(hidden_sto_dir_inode, hidden_sto_dentry);
+ dput(hidden_sto_dentry);
+ if(!err)
+ d_delete(hidden_sto_dentry);
-+
++
+ /* propagate number of hard-links */
+ dentry->d_inode->i_nlink = itohi2(dentry->d_inode)->i_nlink;
-+
++
+ dtost(dentry) = NON_EXISTANT;
-+
++
+ /* was: unlock_dir(hidden_sto_dir_dentry); */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+ mutex_unlock(&hidden_sto_dir_dentry->d_inode->i_mutex);
+ up(&hidden_sto_dir_dentry->d_inode->i_sem);
+#endif
+ dput(hidden_sto_dir_dentry);
-+
++
+ out:
+ return err;
+}
+ dentry_t *hidden_sto_dentry;
+ inode_t *hidden_sto_dir_inode;
+ dentry_t *hidden_sto_dir_dentry;
-+
++
+ check_mini_fo_dentry(dentry);
+
+ if(dtost(dentry) != MODIFIED ||
+
+ hidden_sto_dir_inode = itohi2(dentry->d_parent->d_inode);
+ hidden_sto_dentry = dtohd2(dentry);
-+
++
+ /* was hidden_sto_dir_dentry = lock_parent(hidden_sto_dentry); */
+ hidden_sto_dir_dentry = dget(hidden_sto_dentry->d_parent);
+
+#else
+ down(&hidden_sto_dir_dentry->d_inode->i_sem);
+#endif
-+
++
+ /* avoid destroying the hidden inode if the file is in use */
+ dget(hidden_sto_dentry);
+ err = vfs_unlink(hidden_sto_dir_inode, hidden_sto_dentry);
+ dput(hidden_sto_dentry);
+ if(!err)
+ d_delete(hidden_sto_dentry);
-+
++
+ /* propagate number of hard-links */
+ dentry->d_inode->i_nlink = itohi2(dentry->d_inode)->i_nlink;
-+
++
+ /* dput base dentry, this will relase the inode and free the
+ * dentry, as we will never need it again. */
+ dput(dtohd(dentry));
+ dtost(dentry) = DELETED;
+
+ /* add deleted file to META-file */
-+ meta_add_d_entry(dentry->d_parent,
-+ dentry->d_name.name,
++ meta_add_d_entry(dentry->d_parent,
++ dentry->d_name.name,
+ dentry->d_name.len);
-+
++
+ /* was: unlock_dir(hidden_sto_dir_dentry); */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+ mutex_unlock(&hidden_sto_dir_dentry->d_inode->i_mutex);
+ err = -1;
+ goto out;
+ }
-+
++
+ /* next we have to get a negative dentry for the storage file */
+ err = get_neg_sto_dentry(dentry);
+
+ if(err)
-+ goto out;
++ goto out;
+
+ /* add deleted file to META lists */
-+ err = meta_add_d_entry(dentry->d_parent,
-+ dentry->d_name.name,
++ err = meta_add_d_entry(dentry->d_parent,
++ dentry->d_name.name,
+ dentry->d_name.len);
+
+ if(err)
+ goto out;
-+
++
+ /* dput base dentry, this will relase the inode and free the
+ * dentry, as we will never need it again. */
+ dput(dtohd(dentry));
+ dtohd(dentry) = NULL;
+ dtost(dentry) = DELETED;
-+
++
+ out:
+ return err;
+}
+
+/* bring a dir from state UNMODIFIED to MODIFIED */
-+int dir_unmod_to_mod(dentry_t *dentry)
++int dir_unmod_to_mod(dentry_t *dentry)
+{
+ int err;
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
-+#endif
++#endif
+
+#include "fist.h"
+#include "mini_fo.h"
+
-+#if 0
++
+STATIC void
+mini_fo_read_inode(inode_t *inode)
+{
+ /* I don't think ->a_ops is ever allowed to be NULL */
+ inode->i_mapping->a_ops = &mini_fo_empty_aops;
+}
-+#endif
++
+
+#if defined(FIST_DEBUG) || defined(FIST_FILTER_SCA)
+/*
+ mntput(stopd(sb)->hidden_mnt);
+ mntput(stopd(sb)->hidden_mnt2);
+
-+ /* mk: no! dput(stopd(sb)->base_dir_dentry);
++ /* mk: no! dput(stopd(sb)->base_dir_dentry);
+ dput(stopd(sb)->storage_dir_dentry); */
+
+ kfree(stopd(sb));
+
+struct super_operations mini_fo_sops =
+{
-+// read_inode: mini_fo_read_inode,
++ read_inode: mini_fo_read_inode,
+#if defined(FIST_DEBUG) || defined(FIST_FILTER_SCA)
+ write_inode: mini_fo_write_inode,
+#endif /* defined(FIST_DEBUG) || defined(FIST_FILTER_SCA) */
projects / openwrt.git / blobdiff