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-rw-r--r--fs/logfs/dir.c801
1 files changed, 0 insertions, 801 deletions
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
deleted file mode 100644
index c87ea52de3d9..000000000000
--- a/fs/logfs/dir.c
+++ /dev/null
@@ -1,801 +0,0 @@
-/*
- * fs/logfs/dir.c - directory-related code
- *
- * As should be obvious for Linux kernel code, license is GPLv2
- *
- * Copyright (c) 2005-2008 Joern Engel <joern@logfs.org>
- */
-#include "logfs.h"
-#include <linux/slab.h>
-
-/*
- * Atomic dir operations
- *
- * Directory operations are by default not atomic. Dentries and Inodes are
- * created/removed/altered in separate operations. Therefore we need to do
- * a small amount of journaling.
- *
- * Create, link, mkdir, mknod and symlink all share the same function to do
- * the work: __logfs_create. This function works in two atomic steps:
- * 1. allocate inode (remember in journal)
- * 2. allocate dentry (clear journal)
- *
- * As we can only get interrupted between the two, when the inode we just
- * created is simply stored in the anchor. On next mount, if we were
- * interrupted, we delete the inode. From a users point of view the
- * operation never happened.
- *
- * Unlink and rmdir also share the same function: unlink. Again, this
- * function works in two atomic steps
- * 1. remove dentry (remember inode in journal)
- * 2. unlink inode (clear journal)
- *
- * And again, on the next mount, if we were interrupted, we delete the inode.
- * From a users point of view the operation succeeded.
- *
- * Rename is the real pain to deal with, harder than all the other methods
- * combined. Depending on the circumstances we can run into three cases.
- * A "target rename" where the target dentry already existed, a "local
- * rename" where both parent directories are identical or a "cross-directory
- * rename" in the remaining case.
- *
- * Local rename is atomic, as the old dentry is simply rewritten with a new
- * name.
- *
- * Cross-directory rename works in two steps, similar to __logfs_create and
- * logfs_unlink:
- * 1. Write new dentry (remember old dentry in journal)
- * 2. Remove old dentry (clear journal)
- *
- * Here we remember a dentry instead of an inode. On next mount, if we were
- * interrupted, we delete the dentry. From a users point of view, the
- * operation succeeded.
- *
- * Target rename works in three atomic steps:
- * 1. Attach old inode to new dentry (remember old dentry and new inode)
- * 2. Remove old dentry (still remember the new inode)
- * 3. Remove victim inode
- *
- * Here we remember both an inode an a dentry. If we get interrupted
- * between steps 1 and 2, we delete both the dentry and the inode. If
- * we get interrupted between steps 2 and 3, we delete just the inode.
- * In either case, the remaining objects are deleted on next mount. From
- * a users point of view, the operation succeeded.
- */
-
-static int write_dir(struct inode *dir, struct logfs_disk_dentry *dd,
- loff_t pos)
-{
- return logfs_inode_write(dir, dd, sizeof(*dd), pos, WF_LOCK, NULL);
-}
-
-static int write_inode(struct inode *inode)
-{
- return __logfs_write_inode(inode, NULL, WF_LOCK);
-}
-
-static s64 dir_seek_data(struct inode *inode, s64 pos)
-{
- s64 new_pos = logfs_seek_data(inode, pos);
-
- return max(pos, new_pos - 1);
-}
-
-static int beyond_eof(struct inode *inode, loff_t bix)
-{
- loff_t pos = bix << inode->i_sb->s_blocksize_bits;
- return pos >= i_size_read(inode);
-}
-
-/*
- * Prime value was chosen to be roughly 256 + 26. r5 hash uses 11,
- * so short names (len <= 9) don't even occupy the complete 32bit name
- * space. A prime >256 ensures short names quickly spread the 32bit
- * name space. Add about 26 for the estimated amount of information
- * of each character and pick a prime nearby, preferably a bit-sparse
- * one.
- */
-static u32 logfs_hash_32(const char *s, int len, u32 seed)
-{
- u32 hash = seed;
- int i;
-
- for (i = 0; i < len; i++)
- hash = hash * 293 + s[i];
- return hash;
-}
-
-/*
- * We have to satisfy several conflicting requirements here. Small
- * directories should stay fairly compact and not require too many
- * indirect blocks. The number of possible locations for a given hash
- * should be small to make lookup() fast. And we should try hard not
- * to overflow the 32bit name space or nfs and 32bit host systems will
- * be unhappy.
- *
- * So we use the following scheme. First we reduce the hash to 0..15
- * and try a direct block. If that is occupied we reduce the hash to
- * 16..255 and try an indirect block. Same for 2x and 3x indirect
- * blocks. Lastly we reduce the hash to 0x800_0000 .. 0xffff_ffff,
- * but use buckets containing eight entries instead of a single one.
- *
- * Using 16 entries should allow for a reasonable amount of hash
- * collisions, so the 32bit name space can be packed fairly tight
- * before overflowing. Oh and currently we don't overflow but return
- * and error.
- *
- * How likely are collisions? Doing the appropriate math is beyond me
- * and the Bronstein textbook. But running a test program to brute
- * force collisions for a couple of days showed that on average the
- * first collision occurs after 598M entries, with 290M being the
- * smallest result. Obviously 21 entries could already cause a
- * collision if all entries are carefully chosen.
- */
-static pgoff_t hash_index(u32 hash, int round)
-{
- u32 i0_blocks = I0_BLOCKS;
- u32 i1_blocks = I1_BLOCKS;
- u32 i2_blocks = I2_BLOCKS;
- u32 i3_blocks = I3_BLOCKS;
-
- switch (round) {
- case 0:
- return hash % i0_blocks;
- case 1:
- return i0_blocks + hash % (i1_blocks - i0_blocks);
- case 2:
- return i1_blocks + hash % (i2_blocks - i1_blocks);
- case 3:
- return i2_blocks + hash % (i3_blocks - i2_blocks);
- case 4 ... 19:
- return i3_blocks + 16 * (hash % (((1<<31) - i3_blocks) / 16))
- + round - 4;
- }
- BUG();
-}
-
-static struct page *logfs_get_dd_page(struct inode *dir, struct dentry *dentry)
-{
- const struct qstr *name = &dentry->d_name;
- struct page *page;
- struct logfs_disk_dentry *dd;
- u32 hash = logfs_hash_32(name->name, name->len, 0);
- pgoff_t index;
- int round;
-
- if (name->len > LOGFS_MAX_NAMELEN)
- return ERR_PTR(-ENAMETOOLONG);
-
- for (round = 0; round < 20; round++) {
- index = hash_index(hash, round);
-
- if (beyond_eof(dir, index))
- return NULL;
- if (!logfs_exist_block(dir, index))
- continue;
- page = read_cache_page(dir->i_mapping, index,
- (filler_t *)logfs_readpage, NULL);
- if (IS_ERR(page))
- return page;
- dd = kmap_atomic(page);
- BUG_ON(dd->namelen == 0);
-
- if (name->len != be16_to_cpu(dd->namelen) ||
- memcmp(name->name, dd->name, name->len)) {
- kunmap_atomic(dd);
- put_page(page);
- continue;
- }
-
- kunmap_atomic(dd);
- return page;
- }
- return NULL;
-}
-
-static int logfs_remove_inode(struct inode *inode)
-{
- int ret;
-
- drop_nlink(inode);
- ret = write_inode(inode);
- LOGFS_BUG_ON(ret, inode->i_sb);
- return ret;
-}
-
-static void abort_transaction(struct inode *inode, struct logfs_transaction *ta)
-{
- if (logfs_inode(inode)->li_block)
- logfs_inode(inode)->li_block->ta = NULL;
- kfree(ta);
-}
-
-static int logfs_unlink(struct inode *dir, struct dentry *dentry)
-{
- struct logfs_super *super = logfs_super(dir->i_sb);
- struct inode *inode = d_inode(dentry);
- struct logfs_transaction *ta;
- struct page *page;
- pgoff_t index;
- int ret;
-
- ta = kzalloc(sizeof(*ta), GFP_KERNEL);
- if (!ta)
- return -ENOMEM;
-
- ta->state = UNLINK_1;
- ta->ino = inode->i_ino;
-
- inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(inode);
-
- page = logfs_get_dd_page(dir, dentry);
- if (!page) {
- kfree(ta);
- return -ENOENT;
- }
- if (IS_ERR(page)) {
- kfree(ta);
- return PTR_ERR(page);
- }
- index = page->index;
- put_page(page);
-
- mutex_lock(&super->s_dirop_mutex);
- logfs_add_transaction(dir, ta);
-
- ret = logfs_delete(dir, index, NULL);
- if (!ret)
- ret = write_inode(dir);
-
- if (ret) {
- abort_transaction(dir, ta);
- printk(KERN_ERR"LOGFS: unable to delete inode\n");
- goto out;
- }
-
- ta->state = UNLINK_2;
- logfs_add_transaction(inode, ta);
- ret = logfs_remove_inode(inode);
-out:
- mutex_unlock(&super->s_dirop_mutex);
- return ret;
-}
-
-static inline int logfs_empty_dir(struct inode *dir)
-{
- u64 data;
-
- data = logfs_seek_data(dir, 0) << dir->i_sb->s_blocksize_bits;
- return data >= i_size_read(dir);
-}
-
-static int logfs_rmdir(struct inode *dir, struct dentry *dentry)
-{
- struct inode *inode = d_inode(dentry);
-
- if (!logfs_empty_dir(inode))
- return -ENOTEMPTY;
-
- return logfs_unlink(dir, dentry);
-}
-
-/* FIXME: readdir currently has it's own dir_walk code. I don't see a good
- * way to combine the two copies */
-static int logfs_readdir(struct file *file, struct dir_context *ctx)
-{
- struct inode *dir = file_inode(file);
- loff_t pos;
- struct page *page;
- struct logfs_disk_dentry *dd;
-
- if (ctx->pos < 0)
- return -EINVAL;
-
- if (!dir_emit_dots(file, ctx))
- return 0;
-
- pos = ctx->pos - 2;
- BUG_ON(pos < 0);
- for (;; pos++, ctx->pos++) {
- bool full;
- if (beyond_eof(dir, pos))
- break;
- if (!logfs_exist_block(dir, pos)) {
- /* deleted dentry */
- pos = dir_seek_data(dir, pos);
- continue;
- }
- page = read_cache_page(dir->i_mapping, pos,
- (filler_t *)logfs_readpage, NULL);
- if (IS_ERR(page))
- return PTR_ERR(page);
- dd = kmap(page);
- BUG_ON(dd->namelen == 0);
-
- full = !dir_emit(ctx, (char *)dd->name,
- be16_to_cpu(dd->namelen),
- be64_to_cpu(dd->ino), dd->type);
- kunmap(page);
- put_page(page);
- if (full)
- break;
- }
- return 0;
-}
-
-static void logfs_set_name(struct logfs_disk_dentry *dd, const struct qstr *name)
-{
- dd->namelen = cpu_to_be16(name->len);
- memcpy(dd->name, name->name, name->len);
-}
-
-static struct dentry *logfs_lookup(struct inode *dir, struct dentry *dentry,
- unsigned int flags)
-{
- struct page *page;
- struct logfs_disk_dentry *dd;
- pgoff_t index;
- u64 ino = 0;
- struct inode *inode;
-
- page = logfs_get_dd_page(dir, dentry);
- if (IS_ERR(page))
- return ERR_CAST(page);
- if (!page) {
- d_add(dentry, NULL);
- return NULL;
- }
- index = page->index;
- dd = kmap_atomic(page);
- ino = be64_to_cpu(dd->ino);
- kunmap_atomic(dd);
- put_page(page);
-
- inode = logfs_iget(dir->i_sb, ino);
- if (IS_ERR(inode))
- printk(KERN_ERR"LogFS: Cannot read inode #%llx for dentry (%lx, %lx)n",
- ino, dir->i_ino, index);
- return d_splice_alias(inode, dentry);
-}
-
-static void grow_dir(struct inode *dir, loff_t index)
-{
- index = (index + 1) << dir->i_sb->s_blocksize_bits;
- if (i_size_read(dir) < index)
- i_size_write(dir, index);
-}
-
-static int logfs_write_dir(struct inode *dir, struct dentry *dentry,
- struct inode *inode)
-{
- struct page *page;
- struct logfs_disk_dentry *dd;
- u32 hash = logfs_hash_32(dentry->d_name.name, dentry->d_name.len, 0);
- pgoff_t index;
- int round, err;
-
- for (round = 0; round < 20; round++) {
- index = hash_index(hash, round);
-
- if (logfs_exist_block(dir, index))
- continue;
- page = find_or_create_page(dir->i_mapping, index, GFP_KERNEL);
- if (!page)
- return -ENOMEM;
-
- dd = kmap_atomic(page);
- memset(dd, 0, sizeof(*dd));
- dd->ino = cpu_to_be64(inode->i_ino);
- dd->type = logfs_type(inode);
- logfs_set_name(dd, &dentry->d_name);
- kunmap_atomic(dd);
-
- err = logfs_write_buf(dir, page, WF_LOCK);
- unlock_page(page);
- put_page(page);
- if (!err)
- grow_dir(dir, index);
- return err;
- }
- /* FIXME: Is there a better return value? In most cases neither
- * the filesystem nor the directory are full. But we have had
- * too many collisions for this particular hash and no fallback.
- */
- return -ENOSPC;
-}
-
-static int __logfs_create(struct inode *dir, struct dentry *dentry,
- struct inode *inode, const char *dest, long destlen)
-{
- struct logfs_super *super = logfs_super(dir->i_sb);
- struct logfs_inode *li = logfs_inode(inode);
- struct logfs_transaction *ta;
- int ret;
-
- ta = kzalloc(sizeof(*ta), GFP_KERNEL);
- if (!ta) {
- drop_nlink(inode);
- iput(inode);
- return -ENOMEM;
- }
-
- ta->state = CREATE_1;
- ta->ino = inode->i_ino;
- mutex_lock(&super->s_dirop_mutex);
- logfs_add_transaction(inode, ta);
-
- if (dest) {
- /* symlink */
- ret = logfs_inode_write(inode, dest, destlen, 0, WF_LOCK, NULL);
- if (!ret)
- ret = write_inode(inode);
- } else {
- /* creat/mkdir/mknod */
- ret = write_inode(inode);
- }
- if (ret) {
- abort_transaction(inode, ta);
- li->li_flags |= LOGFS_IF_STILLBORN;
- /* FIXME: truncate symlink */
- drop_nlink(inode);
- iput(inode);
- goto out;
- }
-
- ta->state = CREATE_2;
- logfs_add_transaction(dir, ta);
- ret = logfs_write_dir(dir, dentry, inode);
- /* sync directory */
- if (!ret)
- ret = write_inode(dir);
-
- if (ret) {
- logfs_del_transaction(dir, ta);
- ta->state = CREATE_2;
- logfs_add_transaction(inode, ta);
- logfs_remove_inode(inode);
- iput(inode);
- goto out;
- }
- d_instantiate(dentry, inode);
-out:
- mutex_unlock(&super->s_dirop_mutex);
- return ret;
-}
-
-static int logfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-{
- struct inode *inode;
-
- /*
- * FIXME: why do we have to fill in S_IFDIR, while the mode is
- * correct for mknod, creat, etc.? Smells like the vfs *should*
- * do it for us but for some reason fails to do so.
- */
- inode = logfs_new_inode(dir, S_IFDIR | mode);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- inode->i_op = &logfs_dir_iops;
- inode->i_fop = &logfs_dir_fops;
-
- return __logfs_create(dir, dentry, inode, NULL, 0);
-}
-
-static int logfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- bool excl)
-{
- struct inode *inode;
-
- inode = logfs_new_inode(dir, mode);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- inode->i_op = &logfs_reg_iops;
- inode->i_fop = &logfs_reg_fops;
- inode->i_mapping->a_ops = &logfs_reg_aops;
-
- return __logfs_create(dir, dentry, inode, NULL, 0);
-}
-
-static int logfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
- dev_t rdev)
-{
- struct inode *inode;
-
- if (dentry->d_name.len > LOGFS_MAX_NAMELEN)
- return -ENAMETOOLONG;
-
- inode = logfs_new_inode(dir, mode);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- init_special_inode(inode, mode, rdev);
-
- return __logfs_create(dir, dentry, inode, NULL, 0);
-}
-
-static int logfs_symlink(struct inode *dir, struct dentry *dentry,
- const char *target)
-{
- struct inode *inode;
- size_t destlen = strlen(target) + 1;
-
- if (destlen > dir->i_sb->s_blocksize)
- return -ENAMETOOLONG;
-
- inode = logfs_new_inode(dir, S_IFLNK | 0777);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- inode->i_op = &page_symlink_inode_operations;
- inode_nohighmem(inode);
- inode->i_mapping->a_ops = &logfs_reg_aops;
-
- return __logfs_create(dir, dentry, inode, target, destlen);
-}
-
-static int logfs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *inode = d_inode(old_dentry);
-
- inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(inode);
- ihold(inode);
- inc_nlink(inode);
- mark_inode_dirty_sync(inode);
-
- return __logfs_create(dir, dentry, inode, NULL, 0);
-}
-
-static int logfs_get_dd(struct inode *dir, struct dentry *dentry,
- struct logfs_disk_dentry *dd, loff_t *pos)
-{
- struct page *page;
- void *map;
-
- page = logfs_get_dd_page(dir, dentry);
- if (IS_ERR(page))
- return PTR_ERR(page);
- *pos = page->index;
- map = kmap_atomic(page);
- memcpy(dd, map, sizeof(*dd));
- kunmap_atomic(map);
- put_page(page);
- return 0;
-}
-
-static int logfs_delete_dd(struct inode *dir, loff_t pos)
-{
- /*
- * Getting called with pos somewhere beyond eof is either a goofup
- * within this file or means someone maliciously edited the
- * (crc-protected) journal.
- */
- BUG_ON(beyond_eof(dir, pos));
- dir->i_ctime = dir->i_mtime = current_time(dir);
- log_dir(" Delete dentry (%lx, %llx)\n", dir->i_ino, pos);
- return logfs_delete(dir, pos, NULL);
-}
-
-/*
- * Cross-directory rename, target does not exist. Just a little nasty.
- * Create a new dentry in the target dir, then remove the old dentry,
- * all the while taking care to remember our operation in the journal.
- */
-static int logfs_rename_cross(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- struct logfs_super *super = logfs_super(old_dir->i_sb);
- struct logfs_disk_dentry dd;
- struct logfs_transaction *ta;
- loff_t pos;
- int err;
-
- /* 1. locate source dd */
- err = logfs_get_dd(old_dir, old_dentry, &dd, &pos);
- if (err)
- return err;
-
- ta = kzalloc(sizeof(*ta), GFP_KERNEL);
- if (!ta)
- return -ENOMEM;
-
- ta->state = CROSS_RENAME_1;
- ta->dir = old_dir->i_ino;
- ta->pos = pos;
-
- /* 2. write target dd */
- mutex_lock(&super->s_dirop_mutex);
- logfs_add_transaction(new_dir, ta);
- err = logfs_write_dir(new_dir, new_dentry, d_inode(old_dentry));
- if (!err)
- err = write_inode(new_dir);
-
- if (err) {
- super->s_rename_dir = 0;
- super->s_rename_pos = 0;
- abort_transaction(new_dir, ta);
- goto out;
- }
-
- /* 3. remove source dd */
- ta->state = CROSS_RENAME_2;
- logfs_add_transaction(old_dir, ta);
- err = logfs_delete_dd(old_dir, pos);
- if (!err)
- err = write_inode(old_dir);
- LOGFS_BUG_ON(err, old_dir->i_sb);
-out:
- mutex_unlock(&super->s_dirop_mutex);
- return err;
-}
-
-static int logfs_replace_inode(struct inode *dir, struct dentry *dentry,
- struct logfs_disk_dentry *dd, struct inode *inode)
-{
- loff_t pos;
- int err;
-
- err = logfs_get_dd(dir, dentry, dd, &pos);
- if (err)
- return err;
- dd->ino = cpu_to_be64(inode->i_ino);
- dd->type = logfs_type(inode);
-
- err = write_dir(dir, dd, pos);
- if (err)
- return err;
- log_dir("Replace dentry (%lx, %llx) %s -> %llx\n", dir->i_ino, pos,
- dd->name, be64_to_cpu(dd->ino));
- return write_inode(dir);
-}
-
-/* Target dentry exists - the worst case. We need to attach the source
- * inode to the target dentry, then remove the orphaned target inode and
- * source dentry.
- */
-static int logfs_rename_target(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- struct logfs_super *super = logfs_super(old_dir->i_sb);
- struct inode *old_inode = d_inode(old_dentry);
- struct inode *new_inode = d_inode(new_dentry);
- int isdir = S_ISDIR(old_inode->i_mode);
- struct logfs_disk_dentry dd;
- struct logfs_transaction *ta;
- loff_t pos;
- int err;
-
- BUG_ON(isdir != S_ISDIR(new_inode->i_mode));
- if (isdir) {
- if (!logfs_empty_dir(new_inode))
- return -ENOTEMPTY;
- }
-
- /* 1. locate source dd */
- err = logfs_get_dd(old_dir, old_dentry, &dd, &pos);
- if (err)
- return err;
-
- ta = kzalloc(sizeof(*ta), GFP_KERNEL);
- if (!ta)
- return -ENOMEM;
-
- ta->state = TARGET_RENAME_1;
- ta->dir = old_dir->i_ino;
- ta->pos = pos;
- ta->ino = new_inode->i_ino;
-
- /* 2. attach source inode to target dd */
- mutex_lock(&super->s_dirop_mutex);
- logfs_add_transaction(new_dir, ta);
- err = logfs_replace_inode(new_dir, new_dentry, &dd, old_inode);
- if (err) {
- super->s_rename_dir = 0;
- super->s_rename_pos = 0;
- super->s_victim_ino = 0;
- abort_transaction(new_dir, ta);
- goto out;
- }
-
- /* 3. remove source dd */
- ta->state = TARGET_RENAME_2;
- logfs_add_transaction(old_dir, ta);
- err = logfs_delete_dd(old_dir, pos);
- if (!err)
- err = write_inode(old_dir);
- LOGFS_BUG_ON(err, old_dir->i_sb);
-
- /* 4. remove target inode */
- ta->state = TARGET_RENAME_3;
- logfs_add_transaction(new_inode, ta);
- err = logfs_remove_inode(new_inode);
-
-out:
- mutex_unlock(&super->s_dirop_mutex);
- return err;
-}
-
-static int logfs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry,
- unsigned int flags)
-{
- if (flags & ~RENAME_NOREPLACE)
- return -EINVAL;
-
- if (d_really_is_positive(new_dentry))
- return logfs_rename_target(old_dir, old_dentry,
- new_dir, new_dentry);
- return logfs_rename_cross(old_dir, old_dentry, new_dir, new_dentry);
-}
-
-/* No locking done here, as this is called before .get_sb() returns. */
-int logfs_replay_journal(struct super_block *sb)
-{
- struct logfs_super *super = logfs_super(sb);
- struct inode *inode;
- u64 ino, pos;
- int err;
-
- if (super->s_victim_ino) {
- /* delete victim inode */
- ino = super->s_victim_ino;
- printk(KERN_INFO"LogFS: delete unmapped inode #%llx\n", ino);
- inode = logfs_iget(sb, ino);
- if (IS_ERR(inode))
- goto fail;
-
- LOGFS_BUG_ON(i_size_read(inode) > 0, sb);
- super->s_victim_ino = 0;
- err = logfs_remove_inode(inode);
- iput(inode);
- if (err) {
- super->s_victim_ino = ino;
- goto fail;
- }
- }
- if (super->s_rename_dir) {
- /* delete old dd from rename */
- ino = super->s_rename_dir;
- pos = super->s_rename_pos;
- printk(KERN_INFO"LogFS: delete unbacked dentry (%llx, %llx)\n",
- ino, pos);
- inode = logfs_iget(sb, ino);
- if (IS_ERR(inode))
- goto fail;
-
- super->s_rename_dir = 0;
- super->s_rename_pos = 0;
- err = logfs_delete_dd(inode, pos);
- iput(inode);
- if (err) {
- super->s_rename_dir = ino;
- super->s_rename_pos = pos;
- goto fail;
- }
- }
- return 0;
-fail:
- LOGFS_BUG(sb);
- return -EIO;
-}
-
-const struct inode_operations logfs_dir_iops = {
- .create = logfs_create,
- .link = logfs_link,
- .lookup = logfs_lookup,
- .mkdir = logfs_mkdir,
- .mknod = logfs_mknod,
- .rename = logfs_rename,
- .rmdir = logfs_rmdir,
- .symlink = logfs_symlink,
- .unlink = logfs_unlink,
-};
-const struct file_operations logfs_dir_fops = {
- .fsync = logfs_fsync,
- .unlocked_ioctl = logfs_ioctl,
- .iterate_shared = logfs_readdir,
- .read = generic_read_dir,
- .llseek = generic_file_llseek,
-};