From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/adfs/dir_fplus.c | 265 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 265 insertions(+) create mode 100644 kernel/fs/adfs/dir_fplus.c (limited to 'kernel/fs/adfs/dir_fplus.c') diff --git a/kernel/fs/adfs/dir_fplus.c b/kernel/fs/adfs/dir_fplus.c new file mode 100644 index 000000000..82d14cdf7 --- /dev/null +++ b/kernel/fs/adfs/dir_fplus.c @@ -0,0 +1,265 @@ +/* + * linux/fs/adfs/dir_fplus.c + * + * Copyright (C) 1997-1999 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include +#include "adfs.h" +#include "dir_fplus.h" + +static int +adfs_fplus_read(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir) +{ + struct adfs_bigdirheader *h; + struct adfs_bigdirtail *t; + unsigned long block; + unsigned int blk, size; + int i, ret = -EIO; + + dir->nr_buffers = 0; + + /* start off using fixed bh set - only alloc for big dirs */ + dir->bh_fplus = &dir->bh[0]; + + block = __adfs_block_map(sb, id, 0); + if (!block) { + adfs_error(sb, "dir object %X has a hole at offset 0", id); + goto out; + } + + dir->bh_fplus[0] = sb_bread(sb, block); + if (!dir->bh_fplus[0]) + goto out; + dir->nr_buffers += 1; + + h = (struct adfs_bigdirheader *)dir->bh_fplus[0]->b_data; + size = le32_to_cpu(h->bigdirsize); + if (size != sz) { + printk(KERN_WARNING "adfs: adfs_fplus_read:" + " directory header size %X\n" + " does not match directory size %X\n", + size, sz); + } + + if (h->bigdirversion[0] != 0 || h->bigdirversion[1] != 0 || + h->bigdirversion[2] != 0 || size & 2047 || + h->bigdirstartname != cpu_to_le32(BIGDIRSTARTNAME)) { + printk(KERN_WARNING "adfs: dir object %X has" + " malformed dir header\n", id); + goto out; + } + + size >>= sb->s_blocksize_bits; + if (size > ARRAY_SIZE(dir->bh)) { + /* this directory is too big for fixed bh set, must allocate */ + struct buffer_head **bh_fplus = + kcalloc(size, sizeof(struct buffer_head *), + GFP_KERNEL); + if (!bh_fplus) { + ret = -ENOMEM; + adfs_error(sb, "not enough memory for" + " dir object %X (%d blocks)", id, size); + goto out; + } + dir->bh_fplus = bh_fplus; + /* copy over the pointer to the block that we've already read */ + dir->bh_fplus[0] = dir->bh[0]; + } + + for (blk = 1; blk < size; blk++) { + block = __adfs_block_map(sb, id, blk); + if (!block) { + adfs_error(sb, "dir object %X has a hole at offset %d", id, blk); + goto out; + } + + dir->bh_fplus[blk] = sb_bread(sb, block); + if (!dir->bh_fplus[blk]) { + adfs_error(sb, "dir object %x failed read for offset %d, mapped block %lX", + id, blk, block); + goto out; + } + + dir->nr_buffers += 1; + } + + t = (struct adfs_bigdirtail *) + (dir->bh_fplus[size - 1]->b_data + (sb->s_blocksize - 8)); + + if (t->bigdirendname != cpu_to_le32(BIGDIRENDNAME) || + t->bigdirendmasseq != h->startmasseq || + t->reserved[0] != 0 || t->reserved[1] != 0) { + printk(KERN_WARNING "adfs: dir object %X has " + "malformed dir end\n", id); + goto out; + } + + dir->parent_id = le32_to_cpu(h->bigdirparent); + dir->sb = sb; + return 0; + +out: + if (dir->bh_fplus) { + for (i = 0; i < dir->nr_buffers; i++) + brelse(dir->bh_fplus[i]); + + if (&dir->bh[0] != dir->bh_fplus) + kfree(dir->bh_fplus); + + dir->bh_fplus = NULL; + } + + dir->nr_buffers = 0; + dir->sb = NULL; + return ret; +} + +static int +adfs_fplus_setpos(struct adfs_dir *dir, unsigned int fpos) +{ + struct adfs_bigdirheader *h = + (struct adfs_bigdirheader *) dir->bh_fplus[0]->b_data; + int ret = -ENOENT; + + if (fpos <= le32_to_cpu(h->bigdirentries)) { + dir->pos = fpos; + ret = 0; + } + + return ret; +} + +static void +dir_memcpy(struct adfs_dir *dir, unsigned int offset, void *to, int len) +{ + struct super_block *sb = dir->sb; + unsigned int buffer, partial, remainder; + + buffer = offset >> sb->s_blocksize_bits; + offset &= sb->s_blocksize - 1; + + partial = sb->s_blocksize - offset; + + if (partial >= len) + memcpy(to, dir->bh_fplus[buffer]->b_data + offset, len); + else { + char *c = (char *)to; + + remainder = len - partial; + + memcpy(c, + dir->bh_fplus[buffer]->b_data + offset, + partial); + + memcpy(c + partial, + dir->bh_fplus[buffer + 1]->b_data, + remainder); + } +} + +static int +adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj) +{ + struct adfs_bigdirheader *h = + (struct adfs_bigdirheader *) dir->bh_fplus[0]->b_data; + struct adfs_bigdirentry bde; + unsigned int offset; + int i, ret = -ENOENT; + + if (dir->pos >= le32_to_cpu(h->bigdirentries)) + goto out; + + offset = offsetof(struct adfs_bigdirheader, bigdirname); + offset += ((le32_to_cpu(h->bigdirnamelen) + 4) & ~3); + offset += dir->pos * sizeof(struct adfs_bigdirentry); + + dir_memcpy(dir, offset, &bde, sizeof(struct adfs_bigdirentry)); + + obj->loadaddr = le32_to_cpu(bde.bigdirload); + obj->execaddr = le32_to_cpu(bde.bigdirexec); + obj->size = le32_to_cpu(bde.bigdirlen); + obj->file_id = le32_to_cpu(bde.bigdirindaddr); + obj->attr = le32_to_cpu(bde.bigdirattr); + obj->name_len = le32_to_cpu(bde.bigdirobnamelen); + + offset = offsetof(struct adfs_bigdirheader, bigdirname); + offset += ((le32_to_cpu(h->bigdirnamelen) + 4) & ~3); + offset += le32_to_cpu(h->bigdirentries) * sizeof(struct adfs_bigdirentry); + offset += le32_to_cpu(bde.bigdirobnameptr); + + dir_memcpy(dir, offset, obj->name, obj->name_len); + for (i = 0; i < obj->name_len; i++) + if (obj->name[i] == '/') + obj->name[i] = '.'; + + obj->filetype = -1; + + /* + * object is a file and is filetyped and timestamped? + * RISC OS 12-bit filetype is stored in load_address[19:8] + */ + if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) && + (0xfff00000 == (0xfff00000 & obj->loadaddr))) { + obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8); + + /* optionally append the ,xyz hex filetype suffix */ + if (ADFS_SB(dir->sb)->s_ftsuffix) + obj->name_len += + append_filetype_suffix( + &obj->name[obj->name_len], + obj->filetype); + } + + dir->pos += 1; + ret = 0; +out: + return ret; +} + +static int +adfs_fplus_sync(struct adfs_dir *dir) +{ + int err = 0; + int i; + + for (i = dir->nr_buffers - 1; i >= 0; i--) { + struct buffer_head *bh = dir->bh_fplus[i]; + sync_dirty_buffer(bh); + if (buffer_req(bh) && !buffer_uptodate(bh)) + err = -EIO; + } + + return err; +} + +static void +adfs_fplus_free(struct adfs_dir *dir) +{ + int i; + + if (dir->bh_fplus) { + for (i = 0; i < dir->nr_buffers; i++) + brelse(dir->bh_fplus[i]); + + if (&dir->bh[0] != dir->bh_fplus) + kfree(dir->bh_fplus); + + dir->bh_fplus = NULL; + } + + dir->nr_buffers = 0; + dir->sb = NULL; +} + +struct adfs_dir_ops adfs_fplus_dir_ops = { + .read = adfs_fplus_read, + .setpos = adfs_fplus_setpos, + .getnext = adfs_fplus_getnext, + .sync = adfs_fplus_sync, + .free = adfs_fplus_free +}; -- cgit 1.2.3-korg