summaryrefslogtreecommitdiffstats
path: root/fs/ubifs
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-11 10:49:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-11 10:49:44 -0700
commit4c609922a3ae0248597785d1f9adc8f142a80aef (patch)
tree7fad8817f40c9c5b4700795f39c22fdc6626fb2d /fs/ubifs
parent1689c73a739d094b544c680b0dfdebe52ffee8fb (diff)
parentec037dfcc064f5f81982c78e95bab783568ae35f (diff)
downloadlinux-4c609922a3ae0248597785d1f9adc8f142a80aef.tar.gz
linux-4c609922a3ae0248597785d1f9adc8f142a80aef.tar.bz2
linux-4c609922a3ae0248597785d1f9adc8f142a80aef.zip
Merge tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifs
Pull UBI/UBIFS updates from Richard Weinberger: "This pull request contains: - Fixes for both UBI and UBIFS - overlayfs support (O_TMPFILE, RENAME_WHITEOUT/EXCHANGE) - Code refactoring for the upcoming MLC support" [ Ugh, we just got rid of the "rename2()" naming for the extended rename functionality. And this re-introduces it in ubifs with the cross- renaming and whiteout support. But rather than do any re-organizations in the merge itself, the naming can be cleaned up later ] * tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifs: (27 commits) UBIFS: improve function-level documentation ubifs: fix host xattr_len when changing xattr ubifs: Use move variable in ubifs_rename() ubifs: Implement RENAME_EXCHANGE ubifs: Implement RENAME_WHITEOUT ubifs: Implement O_TMPFILE ubi: Fix Fastmap's update_vol() ubi: Fix races around ubi_refill_pools() ubi: Deal with interrupted erasures in WL UBI: introduce the VID buffer concept UBI: hide EBA internals UBI: provide an helper to query LEB information UBI: provide an helper to check whether a LEB is mapped or not UBI: add an helper to check lnum validity UBI: simplify LEB write and atomic LEB change code UBI: simplify recover_peb() code UBI: move the global ech and vidh variables into struct ubi_attach_info UBI: provide helpers to allocate and free aeb elements UBI: fastmap: use ubi_io_{read, write}_data() instead of ubi_io_{read, write}() UBI: fastmap: use ubi_rb_for_each_entry() in unmap_peb() ...
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/dir.c239
-rw-r--r--fs/ubifs/file.c2
-rw-r--r--fs/ubifs/gc.c2
-rw-r--r--fs/ubifs/journal.c188
-rw-r--r--fs/ubifs/lprops.c2
-rw-r--r--fs/ubifs/lpt_commit.c4
-rw-r--r--fs/ubifs/replay.c2
-rw-r--r--fs/ubifs/ubifs.h8
-rw-r--r--fs/ubifs/xattr.c6
9 files changed, 411 insertions, 42 deletions
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 64902702b17d..c8f60df2733e 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -301,6 +301,95 @@ out_budg:
return err;
}
+static int do_tmpfile(struct inode *dir, struct dentry *dentry,
+ umode_t mode, struct inode **whiteout)
+{
+ struct inode *inode;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1};
+ struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
+ struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir);
+ int err, instantiated = 0;
+
+ /*
+ * Budget request settings: new dirty inode, new direntry,
+ * budget for dirtied inode will be released via writeback.
+ */
+
+ dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
+ dentry, mode, dir->i_ino);
+
+ err = ubifs_budget_space(c, &req);
+ if (err)
+ return err;
+
+ err = ubifs_budget_space(c, &ino_req);
+ if (err) {
+ ubifs_release_budget(c, &req);
+ return err;
+ }
+
+ inode = ubifs_new_inode(c, dir, mode);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out_budg;
+ }
+ ui = ubifs_inode(inode);
+
+ if (whiteout) {
+ init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
+ ubifs_assert(inode->i_op == &ubifs_file_inode_operations);
+ }
+
+ err = ubifs_init_security(dir, inode, &dentry->d_name);
+ if (err)
+ goto out_inode;
+
+ mutex_lock(&ui->ui_mutex);
+ insert_inode_hash(inode);
+
+ if (whiteout) {
+ mark_inode_dirty(inode);
+ drop_nlink(inode);
+ *whiteout = inode;
+ } else {
+ d_tmpfile(dentry, inode);
+ }
+ ubifs_assert(ui->dirty);
+
+ instantiated = 1;
+ mutex_unlock(&ui->ui_mutex);
+
+ mutex_lock(&dir_ui->ui_mutex);
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
+ if (err)
+ goto out_cancel;
+ mutex_unlock(&dir_ui->ui_mutex);
+
+ ubifs_release_budget(c, &req);
+
+ return 0;
+
+out_cancel:
+ mutex_unlock(&dir_ui->ui_mutex);
+out_inode:
+ make_bad_inode(inode);
+ if (!instantiated)
+ iput(inode);
+out_budg:
+ ubifs_release_budget(c, &req);
+ if (!instantiated)
+ ubifs_release_budget(c, &ino_req);
+ ubifs_err(c, "cannot create temporary file, error %d", err);
+ return err;
+}
+
+static int ubifs_tmpfile(struct inode *dir, struct dentry *dentry,
+ umode_t mode)
+{
+ return do_tmpfile(dir, dentry, mode, NULL);
+}
+
/**
* vfs_dent_type - get VFS directory entry type.
* @type: UBIFS directory entry type
@@ -927,37 +1016,43 @@ out_budg:
}
/**
- * lock_3_inodes - a wrapper for locking three UBIFS inodes.
+ * lock_4_inodes - a wrapper for locking three UBIFS inodes.
* @inode1: first inode
* @inode2: second inode
* @inode3: third inode
+ * @inode4: fouth inode
*
* This function is used for 'ubifs_rename()' and @inode1 may be the same as
- * @inode2 whereas @inode3 may be %NULL.
+ * @inode2 whereas @inode3 and @inode4 may be %NULL.
*
* We do not implement any tricks to guarantee strict lock ordering, because
* VFS has already done it for us on the @i_mutex. So this is just a simple
* wrapper function.
*/
-static void lock_3_inodes(struct inode *inode1, struct inode *inode2,
- struct inode *inode3)
+static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
+ struct inode *inode3, struct inode *inode4)
{
mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
if (inode2 != inode1)
mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
if (inode3)
mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
+ if (inode4)
+ mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
}
/**
- * unlock_3_inodes - a wrapper for unlocking three UBIFS inodes for rename.
+ * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
* @inode1: first inode
* @inode2: second inode
* @inode3: third inode
+ * @inode4: fouth inode
*/
-static void unlock_3_inodes(struct inode *inode1, struct inode *inode2,
- struct inode *inode3)
+static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
+ struct inode *inode3, struct inode *inode4)
{
+ if (inode4)
+ mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
if (inode3)
mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
if (inode1 != inode2)
@@ -972,7 +1067,9 @@ static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct ubifs_info *c = old_dir->i_sb->s_fs_info;
struct inode *old_inode = d_inode(old_dentry);
struct inode *new_inode = d_inode(new_dentry);
+ struct inode *whiteout = NULL;
struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
+ struct ubifs_inode *whiteout_ui = NULL;
int err, release, sync = 0, move = (new_dir != old_dir);
int is_dir = S_ISDIR(old_inode->i_mode);
int unlink = !!new_inode;
@@ -997,15 +1094,13 @@ static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
* separately.
*/
- dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu",
+ dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
old_dentry, old_inode->i_ino, old_dir->i_ino,
- new_dentry, new_dir->i_ino);
- ubifs_assert(inode_is_locked(old_dir));
- ubifs_assert(inode_is_locked(new_dir));
+ new_dentry, new_dir->i_ino, flags);
+
if (unlink)
ubifs_assert(inode_is_locked(new_inode));
-
if (unlink && is_dir) {
err = check_dir_empty(c, new_inode);
if (err)
@@ -1021,7 +1116,32 @@ static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
return err;
}
- lock_3_inodes(old_dir, new_dir, new_inode);
+ if (flags & RENAME_WHITEOUT) {
+ union ubifs_dev_desc *dev = NULL;
+
+ dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
+ if (!dev) {
+ ubifs_release_budget(c, &req);
+ ubifs_release_budget(c, &ino_req);
+ return -ENOMEM;
+ }
+
+ err = do_tmpfile(old_dir, old_dentry, S_IFCHR | WHITEOUT_MODE, &whiteout);
+ if (err) {
+ ubifs_release_budget(c, &req);
+ ubifs_release_budget(c, &ino_req);
+ kfree(dev);
+ return err;
+ }
+
+ whiteout->i_state |= I_LINKABLE;
+ whiteout_ui = ubifs_inode(whiteout);
+ whiteout_ui->data = dev;
+ whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
+ ubifs_assert(!whiteout_ui->dirty);
+ }
+
+ lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
/*
* Like most other Unix systems, set the @i_ctime for inodes on a
@@ -1091,12 +1211,34 @@ static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (unlink && IS_SYNC(new_inode))
sync = 1;
}
- err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry,
+
+ if (whiteout) {
+ struct ubifs_budget_req wht_req = { .dirtied_ino = 1,
+ .dirtied_ino_d = \
+ ALIGN(ubifs_inode(whiteout)->data_len, 8) };
+
+ err = ubifs_budget_space(c, &wht_req);
+ if (err) {
+ ubifs_release_budget(c, &req);
+ ubifs_release_budget(c, &ino_req);
+ kfree(whiteout_ui->data);
+ whiteout_ui->data_len = 0;
+ iput(whiteout);
+ return err;
+ }
+
+ inc_nlink(whiteout);
+ mark_inode_dirty(whiteout);
+ whiteout->i_state &= ~I_LINKABLE;
+ iput(whiteout);
+ }
+
+ err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry, whiteout,
sync);
if (err)
goto out_cancel;
- unlock_3_inodes(old_dir, new_dir, new_inode);
+ unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
ubifs_release_budget(c, &req);
mutex_lock(&old_inode_ui->ui_mutex);
@@ -1129,12 +1271,74 @@ out_cancel:
inc_nlink(old_dir);
}
}
- unlock_3_inodes(old_dir, new_dir, new_inode);
+ if (whiteout) {
+ drop_nlink(whiteout);
+ iput(whiteout);
+ }
+ unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
ubifs_release_budget(c, &ino_req);
ubifs_release_budget(c, &req);
return err;
}
+static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct ubifs_info *c = old_dir->i_sb->s_fs_info;
+ struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
+ .dirtied_ino = 2 };
+ int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
+ struct inode *fst_inode = d_inode(old_dentry);
+ struct inode *snd_inode = d_inode(new_dentry);
+ struct timespec time;
+ int err;
+
+ ubifs_assert(fst_inode && snd_inode);
+
+ lock_4_inodes(old_dir, new_dir, NULL, NULL);
+
+ time = ubifs_current_time(old_dir);
+ fst_inode->i_ctime = time;
+ snd_inode->i_ctime = time;
+ old_dir->i_mtime = old_dir->i_ctime = time;
+ new_dir->i_mtime = new_dir->i_ctime = time;
+
+ if (old_dir != new_dir) {
+ if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
+ inc_nlink(new_dir);
+ drop_nlink(old_dir);
+ }
+ else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
+ drop_nlink(new_dir);
+ inc_nlink(old_dir);
+ }
+ }
+
+ err = ubifs_jnl_xrename(c, old_dir, old_dentry, new_dir, new_dentry,
+ sync);
+
+ unlock_4_inodes(old_dir, new_dir, NULL, NULL);
+ ubifs_release_budget(c, &req);
+
+ return err;
+}
+
+static int ubifs_rename2(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
+{
+ if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
+ return -EINVAL;
+
+ ubifs_assert(inode_is_locked(old_dir));
+ ubifs_assert(inode_is_locked(new_dir));
+
+ if (flags & RENAME_EXCHANGE)
+ return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
+
+ return ubifs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
+}
+
int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
@@ -1183,13 +1387,14 @@ const struct inode_operations ubifs_dir_inode_operations = {
.mkdir = ubifs_mkdir,
.rmdir = ubifs_rmdir,
.mknod = ubifs_mknod,
- .rename = ubifs_rename,
+ .rename = ubifs_rename2,
.setattr = ubifs_setattr,
.getattr = ubifs_getattr,
.listxattr = ubifs_listxattr,
#ifdef CONFIG_UBIFS_ATIME_SUPPORT
.update_time = ubifs_update_time,
#endif
+ .tmpfile = ubifs_tmpfile,
};
const struct file_operations ubifs_dir_operations = {
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index a746982fbcda..b4fbeefba246 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1397,7 +1397,7 @@ int ubifs_update_time(struct inode *inode, struct timespec *time,
#endif
/**
- * update_ctime - update mtime and ctime of an inode.
+ * update_mctime - update mtime and ctime of an inode.
* @inode: inode to update
*
* This function updates mtime and ctime of the inode if it is not equivalent to
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index 821b34816976..e845c64b6ce1 100644
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -113,7 +113,7 @@ static int switch_gc_head(struct ubifs_info *c)
* data_nodes_cmp - compare 2 data nodes.
* @priv: UBIFS file-system description object
* @a: first data node
- * @a: second data node
+ * @b: second data node
*
* This function compares data nodes @a and @b. Returns %1 if @a has greater
* inode or block number, and %-1 otherwise.
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index 0b9da5b6e0f9..91bc76dc559e 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -908,6 +908,147 @@ int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode)
}
/**
+ * ubifs_jnl_xrename - cross rename two directory entries.
+ * @c: UBIFS file-system description object
+ * @fst_dir: parent inode of 1st directory entry to exchange
+ * @fst_dentry: 1st directory entry to exchange
+ * @snd_dir: parent inode of 2nd directory entry to exchange
+ * @snd_dentry: 2nd directory entry to exchange
+ * @sync: non-zero if the write-buffer has to be synchronized
+ *
+ * This function implements the cross rename operation which may involve
+ * writing 2 inodes and 2 directory entries. It marks the written inodes as clean
+ * and returns zero on success. In case of failure, a negative error code is
+ * returned.
+ */
+int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir,
+ const struct dentry *fst_dentry,
+ const struct inode *snd_dir,
+ const struct dentry *snd_dentry, int sync)
+{
+ union ubifs_key key;
+ struct ubifs_dent_node *dent1, *dent2;
+ int err, dlen1, dlen2, lnum, offs, len, plen = UBIFS_INO_NODE_SZ;
+ int aligned_dlen1, aligned_dlen2;
+ int twoparents = (fst_dir != snd_dir);
+ const struct inode *fst_inode = d_inode(fst_dentry);
+ const struct inode *snd_inode = d_inode(snd_dentry);
+ void *p;
+
+ dbg_jnl("dent '%pd' in dir ino %lu between dent '%pd' in dir ino %lu",
+ fst_dentry, fst_dir->i_ino, snd_dentry, snd_dir->i_ino);
+
+ ubifs_assert(ubifs_inode(fst_dir)->data_len == 0);
+ ubifs_assert(ubifs_inode(snd_dir)->data_len == 0);
+ ubifs_assert(mutex_is_locked(&ubifs_inode(fst_dir)->ui_mutex));
+ ubifs_assert(mutex_is_locked(&ubifs_inode(snd_dir)->ui_mutex));
+
+ dlen1 = UBIFS_DENT_NODE_SZ + snd_dentry->d_name.len + 1;
+ dlen2 = UBIFS_DENT_NODE_SZ + fst_dentry->d_name.len + 1;
+ aligned_dlen1 = ALIGN(dlen1, 8);
+ aligned_dlen2 = ALIGN(dlen2, 8);
+
+ len = aligned_dlen1 + aligned_dlen2 + ALIGN(plen, 8);
+ if (twoparents)
+ len += plen;
+
+ dent1 = kmalloc(len, GFP_NOFS);
+ if (!dent1)
+ return -ENOMEM;
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, len);
+ if (err)
+ goto out_free;
+
+ /* Make new dent for 1st entry */
+ dent1->ch.node_type = UBIFS_DENT_NODE;
+ dent_key_init_flash(c, &dent1->key, snd_dir->i_ino, &snd_dentry->d_name);
+ dent1->inum = cpu_to_le64(fst_inode->i_ino);
+ dent1->type = get_dent_type(fst_inode->i_mode);
+ dent1->nlen = cpu_to_le16(snd_dentry->d_name.len);
+ memcpy(dent1->name, snd_dentry->d_name.name, snd_dentry->d_name.len);
+ dent1->name[snd_dentry->d_name.len] = '\0';
+ zero_dent_node_unused(dent1);
+ ubifs_prep_grp_node(c, dent1, dlen1, 0);
+
+ /* Make new dent for 2nd entry */
+ dent2 = (void *)dent1 + aligned_dlen1;
+ dent2->ch.node_type = UBIFS_DENT_NODE;
+ dent_key_init_flash(c, &dent2->key, fst_dir->i_ino, &fst_dentry->d_name);
+ dent2->inum = cpu_to_le64(snd_inode->i_ino);
+ dent2->type = get_dent_type(snd_inode->i_mode);
+ dent2->nlen = cpu_to_le16(fst_dentry->d_name.len);
+ memcpy(dent2->name, fst_dentry->d_name.name, fst_dentry->d_name.len);
+ dent2->name[fst_dentry->d_name.len] = '\0';
+ zero_dent_node_unused(dent2);
+ ubifs_prep_grp_node(c, dent2, dlen2, 0);
+
+ p = (void *)dent2 + aligned_dlen2;
+ if (!twoparents)
+ pack_inode(c, p, fst_dir, 1);
+ else {
+ pack_inode(c, p, fst_dir, 0);
+ p += ALIGN(plen, 8);
+ pack_inode(c, p, snd_dir, 1);
+ }
+
+ err = write_head(c, BASEHD, dent1, len, &lnum, &offs, sync);
+ if (err)
+ goto out_release;
+ if (!sync) {
+ struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
+
+ ubifs_wbuf_add_ino_nolock(wbuf, fst_dir->i_ino);
+ ubifs_wbuf_add_ino_nolock(wbuf, snd_dir->i_ino);
+ }
+ release_head(c, BASEHD);
+
+ dent_key_init(c, &key, snd_dir->i_ino, &snd_dentry->d_name);
+ err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, &snd_dentry->d_name);
+ if (err)
+ goto out_ro;
+
+ offs += aligned_dlen1;
+ dent_key_init(c, &key, fst_dir->i_ino, &fst_dentry->d_name);
+ err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, &fst_dentry->d_name);
+ if (err)
+ goto out_ro;
+
+ offs += aligned_dlen2;
+
+ ino_key_init(c, &key, fst_dir->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, plen);
+ if (err)
+ goto out_ro;
+
+ if (twoparents) {
+ offs += ALIGN(plen, 8);
+ ino_key_init(c, &key, snd_dir->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, plen);
+ if (err)
+ goto out_ro;
+ }
+
+ finish_reservation(c);
+
+ mark_inode_clean(c, ubifs_inode(fst_dir));
+ if (twoparents)
+ mark_inode_clean(c, ubifs_inode(snd_dir));
+ kfree(dent1);
+ return 0;
+
+out_release:
+ release_head(c, BASEHD);
+out_ro:
+ ubifs_ro_mode(c, err);
+ finish_reservation(c);
+out_free:
+ kfree(dent1);
+ return err;
+}
+
+/**
* ubifs_jnl_rename - rename a directory entry.
* @c: UBIFS file-system description object
* @old_dir: parent inode of directory entry to rename
@@ -917,14 +1058,15 @@ int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode)
* @sync: non-zero if the write-buffer has to be synchronized
*
* This function implements the re-name operation which may involve writing up
- * to 3 inodes and 2 directory entries. It marks the written inodes as clean
+ * to 4 inodes and 2 directory entries. It marks the written inodes as clean
* and returns zero on success. In case of failure, a negative error code is
* returned.
*/
int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
const struct dentry *old_dentry,
const struct inode *new_dir,
- const struct dentry *new_dentry, int sync)
+ const struct dentry *new_dentry,
+ const struct inode *whiteout, int sync)
{
void *p;
union ubifs_key key;
@@ -958,7 +1100,7 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
aligned_dlen1 = ALIGN(dlen1, 8);
aligned_dlen2 = ALIGN(dlen2, 8);
len = aligned_dlen1 + aligned_dlen2 + ALIGN(ilen, 8) + ALIGN(plen, 8);
- if (old_dir != new_dir)
+ if (move)
len += plen;
dent = kmalloc(len, GFP_NOFS);
if (!dent)
@@ -980,13 +1122,19 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
zero_dent_node_unused(dent);
ubifs_prep_grp_node(c, dent, dlen1, 0);
- /* Make deletion dent */
dent2 = (void *)dent + aligned_dlen1;
dent2->ch.node_type = UBIFS_DENT_NODE;
dent_key_init_flash(c, &dent2->key, old_dir->i_ino,
&old_dentry->d_name);
- dent2->inum = 0;
- dent2->type = DT_UNKNOWN;
+
+ if (whiteout) {
+ dent2->inum = cpu_to_le64(whiteout->i_ino);
+ dent2->type = get_dent_type(whiteout->i_mode);
+ } else {
+ /* Make deletion dent */
+ dent2->inum = 0;
+ dent2->type = DT_UNKNOWN;
+ }
dent2->nlen = cpu_to_le16(old_dentry->d_name.len);
memcpy(dent2->name, old_dentry->d_name.name, old_dentry->d_name.len);
dent2->name[old_dentry->d_name.len] = '\0';
@@ -1035,16 +1183,26 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
if (err)
goto out_ro;
- err = ubifs_add_dirt(c, lnum, dlen2);
- if (err)
- goto out_ro;
+ offs += aligned_dlen1;
+ if (whiteout) {
+ dent_key_init(c, &key, old_dir->i_ino, &old_dentry->d_name);
+ err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, &old_dentry->d_name);
+ if (err)
+ goto out_ro;
- dent_key_init(c, &key, old_dir->i_ino, &old_dentry->d_name);
- err = ubifs_tnc_remove_nm(c, &key, &old_dentry->d_name);
- if (err)
- goto out_ro;
+ ubifs_delete_orphan(c, whiteout->i_ino);
+ } else {
+ err = ubifs_add_dirt(c, lnum, dlen2);
+ if (err)
+ goto out_ro;
+
+ dent_key_init(c, &key, old_dir->i_ino, &old_dentry->d_name);
+ err = ubifs_tnc_remove_nm(c, &key, &old_dentry->d_name);
+ if (err)
+ goto out_ro;
+ }
- offs += aligned_dlen1 + aligned_dlen2;
+ offs += aligned_dlen2;
if (new_inode) {
ino_key_init(c, &key, new_inode->i_ino);
err = ubifs_tnc_add(c, &key, lnum, offs, ilen);
@@ -1058,7 +1216,7 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
if (err)
goto out_ro;
- if (old_dir != new_dir) {
+ if (move) {
offs += ALIGN(plen, 8);
ino_key_init(c, &key, new_dir->i_ino);
err = ubifs_tnc_add(c, &key, lnum, offs, plen);
diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
index a0011aa3a779..6c3a1abd0e22 100644
--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -636,7 +636,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
/**
* ubifs_get_lp_stats - get lprops statistics.
* @c: UBIFS file-system description object
- * @st: return statistics
+ * @lst: return statistics
*/
void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *lst)
{
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index ce89bdc3eb02..235654c2fe89 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -34,7 +34,6 @@ static int dbg_populate_lsave(struct ubifs_info *c);
/**
* first_dirty_cnode - find first dirty cnode.
- * @c: UBIFS file-system description object
* @nnode: nnode at which to start
*
* This function returns the first dirty cnode or %NULL if there is not one.
@@ -1623,7 +1622,6 @@ static int dbg_is_node_dirty(struct ubifs_info *c, int node_type, int lnum,
* dbg_check_ltab_lnum - check the ltab for a LPT LEB number.
* @c: the UBIFS file-system description object
* @lnum: LEB number where node was written
- * @offs: offset where node was written
*
* This function returns %0 on success and a negative error code on failure.
*/
@@ -1870,7 +1868,7 @@ int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len)
}
/**
- * ubifs_dump_lpt_leb - dump an LPT LEB.
+ * dump_lpt_leb - dump an LPT LEB.
* @c: UBIFS file-system description object
* @lnum: LEB number to dump
*
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index 3ca4540130b5..fb0f44cd1e28 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -267,7 +267,7 @@ static int apply_replay_entry(struct ubifs_info *c, struct replay_entry *r)
* replay_entries_cmp - compare 2 replay entries.
* @priv: UBIFS file-system description object
* @a: first replay entry
- * @a: second replay entry
+ * @b: second replay entry
*
* This is a comparios function for 'list_sort()' which compares 2 replay
* entries @a and @b by comparing their sequence numer. Returns %1 if @a has
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 4617d459022a..096035eb29d0 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -157,6 +157,7 @@ enum {
WB_MUTEX_1 = 0,
WB_MUTEX_2 = 1,
WB_MUTEX_3 = 2,
+ WB_MUTEX_4 = 3,
};
/*
@@ -1520,10 +1521,15 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
const union ubifs_key *key, const void *buf, int len);
int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode);
int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode);
+int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir,
+ const struct dentry *fst_dentry,
+ const struct inode *snd_dir,
+ const struct dentry *snd_dentry, int sync);
int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
const struct dentry *old_dentry,
const struct inode *new_dir,
- const struct dentry *new_dentry, int sync);
+ const struct dentry *new_dentry,
+ const struct inode *whiteout, int sync);
int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
loff_t old_size, loff_t new_size);
int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index 11a004114eba..6c2f4d41ed73 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -200,6 +200,7 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
struct ubifs_inode *host_ui = ubifs_inode(host);
struct ubifs_inode *ui = ubifs_inode(inode);
void *buf = NULL;
+ int old_size;
struct ubifs_budget_req req = { .dirtied_ino = 2,
.dirtied_ino_d = ALIGN(size, 8) + ALIGN(host_ui->data_len, 8) };
@@ -217,12 +218,13 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
kfree(ui->data);
ui->data = buf;
inode->i_size = ui->ui_size = size;
+ old_size = ui->data_len;
ui->data_len = size;
mutex_unlock(&ui->ui_mutex);
mutex_lock(&host_ui->ui_mutex);
host->i_ctime = ubifs_current_time(host);
- host_ui->xattr_size -= CALC_XATTR_BYTES(ui->data_len);
+ host_ui->xattr_size -= CALC_XATTR_BYTES(old_size);
host_ui->xattr_size += CALC_XATTR_BYTES(size);
/*
@@ -241,7 +243,7 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
out_cancel:
host_ui->xattr_size -= CALC_XATTR_BYTES(size);
- host_ui->xattr_size += CALC_XATTR_BYTES(ui->data_len);
+ host_ui->xattr_size += CALC_XATTR_BYTES(old_size);
mutex_unlock(&host_ui->ui_mutex);
make_bad_inode(inode);
out_free: