Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
new file mode 100644
index 0000000..0530077
--- /dev/null
+++ b/fs/sysv/inode.c
@@ -0,0 +1,354 @@
+/*
+ * linux/fs/sysv/inode.c
+ *
+ * minix/inode.c
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * xenix/inode.c
+ * Copyright (C) 1992 Doug Evans
+ *
+ * coh/inode.c
+ * Copyright (C) 1993 Pascal Haible, Bruno Haible
+ *
+ * sysv/inode.c
+ * Copyright (C) 1993 Paul B. Monday
+ *
+ * sysv/inode.c
+ * Copyright (C) 1993 Bruno Haible
+ * Copyright (C) 1997, 1998 Krzysztof G. Baranowski
+ *
+ * This file contains code for allocating/freeing inodes and for read/writing
+ * the superblock.
+ */
+
+#include <linux/smp_lock.h>
+#include <linux/highuid.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <asm/byteorder.h>
+#include "sysv.h"
+
+/* This is only called on sync() and umount(), when s_dirt=1. */
+static void sysv_write_super(struct super_block *sb)
+{
+ struct sysv_sb_info *sbi = SYSV_SB(sb);
+ unsigned long time = get_seconds(), old_time;
+
+ lock_kernel();
+ if (sb->s_flags & MS_RDONLY)
+ goto clean;
+
+ /*
+ * If we are going to write out the super block,
+ * then attach current time stamp.
+ * But if the filesystem was marked clean, keep it clean.
+ */
+ old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
+ if (sbi->s_type == FSTYPE_SYSV4) {
+ if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
+ *sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time);
+ *sbi->s_sb_time = cpu_to_fs32(sbi, time);
+ mark_buffer_dirty(sbi->s_bh2);
+ }
+clean:
+ sb->s_dirt = 0;
+ unlock_kernel();
+}
+
+static int sysv_remount(struct super_block *sb, int *flags, char *data)
+{
+ struct sysv_sb_info *sbi = SYSV_SB(sb);
+ if (sbi->s_forced_ro)
+ *flags |= MS_RDONLY;
+ if (!(*flags & MS_RDONLY))
+ sb->s_dirt = 1;
+ return 0;
+}
+
+static void sysv_put_super(struct super_block *sb)
+{
+ struct sysv_sb_info *sbi = SYSV_SB(sb);
+
+ if (!(sb->s_flags & MS_RDONLY)) {
+ /* XXX ext2 also updates the state here */
+ mark_buffer_dirty(sbi->s_bh1);
+ if (sbi->s_bh1 != sbi->s_bh2)
+ mark_buffer_dirty(sbi->s_bh2);
+ }
+
+ brelse(sbi->s_bh1);
+ if (sbi->s_bh1 != sbi->s_bh2)
+ brelse(sbi->s_bh2);
+
+ kfree(sbi);
+}
+
+static int sysv_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+ struct sysv_sb_info *sbi = SYSV_SB(sb);
+
+ buf->f_type = sb->s_magic;
+ buf->f_bsize = sb->s_blocksize;
+ buf->f_blocks = sbi->s_ndatazones;
+ buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
+ buf->f_files = sbi->s_ninodes;
+ buf->f_ffree = sysv_count_free_inodes(sb);
+ buf->f_namelen = SYSV_NAMELEN;
+ return 0;
+}
+
+/*
+ * NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
+ */
+static inline void read3byte(struct sysv_sb_info *sbi,
+ unsigned char * from, unsigned char * to)
+{
+ if (sbi->s_bytesex == BYTESEX_PDP) {
+ to[0] = from[0];
+ to[1] = 0;
+ to[2] = from[1];
+ to[3] = from[2];
+ } else if (sbi->s_bytesex == BYTESEX_LE) {
+ to[0] = from[0];
+ to[1] = from[1];
+ to[2] = from[2];
+ to[3] = 0;
+ } else {
+ to[0] = 0;
+ to[1] = from[0];
+ to[2] = from[1];
+ to[3] = from[2];
+ }
+}
+
+static inline void write3byte(struct sysv_sb_info *sbi,
+ unsigned char * from, unsigned char * to)
+{
+ if (sbi->s_bytesex == BYTESEX_PDP) {
+ to[0] = from[0];
+ to[1] = from[2];
+ to[2] = from[3];
+ } else if (sbi->s_bytesex == BYTESEX_LE) {
+ to[0] = from[0];
+ to[1] = from[1];
+ to[2] = from[2];
+ } else {
+ to[0] = from[1];
+ to[1] = from[2];
+ to[2] = from[3];
+ }
+}
+
+static struct inode_operations sysv_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
+ .getattr = sysv_getattr,
+};
+
+void sysv_set_inode(struct inode *inode, dev_t rdev)
+{
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &sysv_file_inode_operations;
+ inode->i_fop = &sysv_file_operations;
+ inode->i_mapping->a_ops = &sysv_aops;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &sysv_dir_inode_operations;
+ inode->i_fop = &sysv_dir_operations;
+ inode->i_mapping->a_ops = &sysv_aops;
+ } else if (S_ISLNK(inode->i_mode)) {
+ if (inode->i_blocks) {
+ inode->i_op = &sysv_symlink_inode_operations;
+ inode->i_mapping->a_ops = &sysv_aops;
+ } else
+ inode->i_op = &sysv_fast_symlink_inode_operations;
+ } else
+ init_special_inode(inode, inode->i_mode, rdev);
+}
+
+static void sysv_read_inode(struct inode *inode)
+{
+ struct super_block * sb = inode->i_sb;
+ struct sysv_sb_info * sbi = SYSV_SB(sb);
+ struct buffer_head * bh;
+ struct sysv_inode * raw_inode;
+ struct sysv_inode_info * si;
+ unsigned int block, ino = inode->i_ino;
+
+ if (!ino || ino > sbi->s_ninodes) {
+ printk("Bad inode number on dev %s: %d is out of range\n",
+ inode->i_sb->s_id, ino);
+ goto bad_inode;
+ }
+ raw_inode = sysv_raw_inode(sb, ino, &bh);
+ if (!raw_inode) {
+ printk("Major problem: unable to read inode from dev %s\n",
+ inode->i_sb->s_id);
+ goto bad_inode;
+ }
+ /* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
+ inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
+ inode->i_uid = (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid);
+ inode->i_gid = (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid);
+ inode->i_nlink = fs16_to_cpu(sbi, raw_inode->i_nlink);
+ inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
+ inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
+ inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
+ inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
+ inode->i_ctime.tv_nsec = 0;
+ inode->i_atime.tv_nsec = 0;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_blocks = inode->i_blksize = 0;
+
+ si = SYSV_I(inode);
+ for (block = 0; block < 10+1+1+1; block++)
+ read3byte(sbi, &raw_inode->i_data[3*block],
+ (u8 *)&si->i_data[block]);
+ brelse(bh);
+ si->i_dir_start_lookup = 0;
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+ sysv_set_inode(inode,
+ old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
+ else
+ sysv_set_inode(inode, 0);
+ return;
+
+bad_inode:
+ make_bad_inode(inode);
+ return;
+}
+
+static struct buffer_head * sysv_update_inode(struct inode * inode)
+{
+ struct super_block * sb = inode->i_sb;
+ struct sysv_sb_info * sbi = SYSV_SB(sb);
+ struct buffer_head * bh;
+ struct sysv_inode * raw_inode;
+ struct sysv_inode_info * si;
+ unsigned int ino, block;
+
+ ino = inode->i_ino;
+ if (!ino || ino > sbi->s_ninodes) {
+ printk("Bad inode number on dev %s: %d is out of range\n",
+ inode->i_sb->s_id, ino);
+ return NULL;
+ }
+ raw_inode = sysv_raw_inode(sb, ino, &bh);
+ if (!raw_inode) {
+ printk("unable to read i-node block\n");
+ return NULL;
+ }
+
+ raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
+ raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(inode->i_uid));
+ raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(inode->i_gid));
+ raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
+ raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
+ raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
+ raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
+ raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);
+
+ si = SYSV_I(inode);
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+ si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
+ for (block = 0; block < 10+1+1+1; block++)
+ write3byte(sbi, (u8 *)&si->i_data[block],
+ &raw_inode->i_data[3*block]);
+ mark_buffer_dirty(bh);
+ return bh;
+}
+
+int sysv_write_inode(struct inode * inode, int wait)
+{
+ struct buffer_head *bh;
+ lock_kernel();
+ bh = sysv_update_inode(inode);
+ brelse(bh);
+ unlock_kernel();
+ return 0;
+}
+
+int sysv_sync_inode(struct inode * inode)
+{
+ int err = 0;
+ struct buffer_head *bh;
+
+ bh = sysv_update_inode(inode);
+ if (bh && buffer_dirty(bh)) {
+ sync_dirty_buffer(bh);
+ if (buffer_req(bh) && !buffer_uptodate(bh)) {
+ printk ("IO error syncing sysv inode [%s:%08lx]\n",
+ inode->i_sb->s_id, inode->i_ino);
+ err = -1;
+ }
+ }
+ else if (!bh)
+ err = -1;
+ brelse (bh);
+ return err;
+}
+
+static void sysv_delete_inode(struct inode *inode)
+{
+ inode->i_size = 0;
+ sysv_truncate(inode);
+ lock_kernel();
+ sysv_free_inode(inode);
+ unlock_kernel();
+}
+
+static kmem_cache_t *sysv_inode_cachep;
+
+static struct inode *sysv_alloc_inode(struct super_block *sb)
+{
+ struct sysv_inode_info *si;
+
+ si = kmem_cache_alloc(sysv_inode_cachep, SLAB_KERNEL);
+ if (!si)
+ return NULL;
+ return &si->vfs_inode;
+}
+
+static void sysv_destroy_inode(struct inode *inode)
+{
+ kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
+}
+
+static void init_once(void *p, kmem_cache_t *cachep, unsigned long flags)
+{
+ struct sysv_inode_info *si = (struct sysv_inode_info *)p;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&si->vfs_inode);
+}
+
+struct super_operations sysv_sops = {
+ .alloc_inode = sysv_alloc_inode,
+ .destroy_inode = sysv_destroy_inode,
+ .read_inode = sysv_read_inode,
+ .write_inode = sysv_write_inode,
+ .delete_inode = sysv_delete_inode,
+ .put_super = sysv_put_super,
+ .write_super = sysv_write_super,
+ .remount_fs = sysv_remount,
+ .statfs = sysv_statfs,
+};
+
+int __init sysv_init_icache(void)
+{
+ sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
+ sizeof(struct sysv_inode_info), 0,
+ SLAB_RECLAIM_ACCOUNT,
+ init_once, NULL);
+ if (!sysv_inode_cachep)
+ return -ENOMEM;
+ return 0;
+}
+
+void sysv_destroy_icache(void)
+{
+ kmem_cache_destroy(sysv_inode_cachep);
+}