diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.32/233-jffs2_whiteout_support.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.32/233-jffs2_whiteout_support.patch | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.32/233-jffs2_whiteout_support.patch b/target/linux/generic-2.6/patches-2.6.32/233-jffs2_whiteout_support.patch deleted file mode 100644 index 6583ac3d91..0000000000 --- a/target/linux/generic-2.6/patches-2.6.32/233-jffs2_whiteout_support.patch +++ /dev/null @@ -1,186 +0,0 @@ ---- a/fs/jffs2/dir.c -+++ b/fs/jffs2/dir.c -@@ -34,6 +34,9 @@ static int jffs2_mknod (struct inode *,s - static int jffs2_rename (struct inode *, struct dentry *, - struct inode *, struct dentry *); - -+static int jffs2_whiteout (struct inode *, struct dentry *, struct dentry *); -+static int jffs2_fallthru (struct inode *, struct dentry *); -+ - const struct file_operations jffs2_dir_operations = - { - .read = generic_read_dir, -@@ -55,6 +58,8 @@ const struct inode_operations jffs2_dir_ - .rmdir = jffs2_rmdir, - .mknod = jffs2_mknod, - .rename = jffs2_rename, -+ .fallthru = jffs2_fallthru, -+ .whiteout = jffs2_whiteout, - .check_acl = jffs2_check_acl, - .setattr = jffs2_setattr, - .setxattr = jffs2_setxattr, -@@ -98,8 +103,21 @@ static struct dentry *jffs2_lookup(struc - fd = fd_list; - } - } -- if (fd) -- ino = fd->ino; -+ if (fd) { -+ spin_lock(&target->d_lock); -+ switch(fd->type) { -+ case DT_WHT: -+ target->d_flags |= DCACHE_WHITEOUT; -+ break; -+ case DT_UNKNOWN: -+ target->d_flags |= DCACHE_FALLTHRU; -+ break; -+ default: -+ ino = fd->ino; -+ break; -+ } -+ spin_unlock(&target->d_lock); -+ } - mutex_unlock(&dir_f->sem); - if (ino) { - inode = jffs2_iget(dir_i->i_sb, ino); -@@ -155,7 +173,9 @@ static int jffs2_readdir(struct file *fi - fd->name, fd->ino, fd->type, curofs, offset)); - continue; - } -- if (!fd->ino) { -+ if (fd->type == DT_UNKNOWN) -+ fd->ino = 100; /* XXX: arbitrary */ -+ else if (!fd->ino && (fd->type != DT_WHT)) { - D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name)); - offset++; - continue; -@@ -498,6 +518,11 @@ static int jffs2_mkdir (struct inode *di - return PTR_ERR(inode); - } - -+ if (dentry->d_flags & DCACHE_WHITEOUT) { -+ inode->i_flags |= S_OPAQUE; -+ ri->flags = cpu_to_je16(JFFS2_INO_FLAG_OPAQUE); -+ } -+ - inode->i_op = &jffs2_dir_inode_operations; - inode->i_fop = &jffs2_dir_operations; - -@@ -779,6 +804,82 @@ static int jffs2_mknod (struct inode *di - return 0; - } - -+static int jffs2_fallthru (struct inode *dir, struct dentry *dentry) -+{ -+ struct jffs2_sb_info *c = JFFS2_SB_INFO(dir->i_sb); -+ uint32_t now; -+ int ret; -+ -+ now = get_seconds(); -+ ret = jffs2_do_link(c, JFFS2_INODE_INFO(dir), 0, DT_UNKNOWN, -+ dentry->d_name.name, dentry->d_name.len, now); -+ if (ret) -+ return ret; -+ -+ d_instantiate(dentry, NULL); -+ spin_lock(&dentry->d_lock); -+ dentry->d_flags |= DCACHE_FALLTHRU; -+ spin_unlock(&dentry->d_lock); -+ -+ return 0; -+} -+ -+static int jffs2_whiteout (struct inode *dir, struct dentry *old_dentry, -+ struct dentry *new_dentry) -+{ -+ struct jffs2_sb_info *c = JFFS2_SB_INFO(dir->i_sb); -+ struct jffs2_inode_info *victim_f = NULL; -+ uint32_t now; -+ int ret; -+ -+ /* If it's a directory, then check whether it is really empty -+ */ -+ if (new_dentry->d_inode) { -+ victim_f = JFFS2_INODE_INFO(old_dentry->d_inode); -+ if (S_ISDIR(old_dentry->d_inode->i_mode)) { -+ struct jffs2_full_dirent *fd; -+ -+ mutex_lock(&victim_f->sem); -+ for (fd = victim_f->dents; fd; fd = fd->next) { -+ if (fd->ino) { -+ mutex_unlock(&victim_f->sem); -+ return -ENOTEMPTY; -+ } -+ } -+ mutex_unlock(&victim_f->sem); -+ } -+ } -+ -+ now = get_seconds(); -+ ret = jffs2_do_link(c, JFFS2_INODE_INFO(dir), 0, DT_WHT, -+ new_dentry->d_name.name, new_dentry->d_name.len, now); -+ if (ret) -+ return ret; -+ -+ spin_lock(&new_dentry->d_lock); -+ new_dentry->d_flags &= ~DCACHE_FALLTHRU; -+ new_dentry->d_flags |= DCACHE_WHITEOUT; -+ spin_unlock(&new_dentry->d_lock); -+ d_add(new_dentry, NULL); -+ -+ if (victim_f) { -+ /* There was a victim. Kill it off nicely */ -+ drop_nlink(old_dentry->d_inode); -+ /* Don't oops if the victim was a dirent pointing to an -+ inode which didn't exist. */ -+ if (victim_f->inocache) { -+ mutex_lock(&victim_f->sem); -+ if (S_ISDIR(old_dentry->d_inode->i_mode)) -+ victim_f->inocache->pino_nlink = 0; -+ else -+ victim_f->inocache->pino_nlink--; -+ mutex_unlock(&victim_f->sem); -+ } -+ } -+ -+ return 0; -+} -+ - static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, - struct inode *new_dir_i, struct dentry *new_dentry) - { ---- a/fs/jffs2/fs.c -+++ b/fs/jffs2/fs.c -@@ -301,6 +301,10 @@ struct inode *jffs2_iget(struct super_bl - - inode->i_op = &jffs2_dir_inode_operations; - inode->i_fop = &jffs2_dir_operations; -+ -+ if (je16_to_cpu(latest_node.flags) & JFFS2_INO_FLAG_OPAQUE) -+ inode->i_flags |= S_OPAQUE; -+ - break; - } - case S_IFREG: ---- a/fs/jffs2/super.c -+++ b/fs/jffs2/super.c -@@ -172,7 +172,7 @@ static int jffs2_fill_super(struct super - - sb->s_op = &jffs2_super_operations; - sb->s_export_op = &jffs2_export_ops; -- sb->s_flags = sb->s_flags | MS_NOATIME; -+ sb->s_flags = sb->s_flags | MS_NOATIME | MS_WHITEOUT; - sb->s_xattr = jffs2_xattr_handlers; - #ifdef CONFIG_JFFS2_FS_POSIX_ACL - sb->s_flags |= MS_POSIXACL; ---- a/include/linux/jffs2.h -+++ b/include/linux/jffs2.h -@@ -87,6 +87,8 @@ - #define JFFS2_INO_FLAG_USERCOMPR 2 /* User has requested a specific - compression type */ - -+#define JFFS2_INO_FLAG_OPAQUE 4 /* Directory is opaque (for union mounts) */ -+ - - /* These can go once we've made sure we've caught all uses without - byteswapping */ |