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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/affs/super.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/affs/super.c')
-rw-r--r--ANDROID_3.4.5/fs/affs/super.c622
1 files changed, 0 insertions, 622 deletions
diff --git a/ANDROID_3.4.5/fs/affs/super.c b/ANDROID_3.4.5/fs/affs/super.c
deleted file mode 100644
index 0782653a..00000000
--- a/ANDROID_3.4.5/fs/affs/super.c
+++ /dev/null
@@ -1,622 +0,0 @@
-/*
- * linux/fs/affs/inode.c
- *
- * (c) 1996 Hans-Joachim Widmaier - Rewritten
- *
- * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
- *
- * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem.
- *
- * (C) 1991 Linus Torvalds - minix filesystem
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/statfs.h>
-#include <linux/parser.h>
-#include <linux/magic.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include "affs.h"
-
-extern struct timezone sys_tz;
-
-static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
-static int affs_remount (struct super_block *sb, int *flags, char *data);
-
-static void
-affs_commit_super(struct super_block *sb, int wait, int clean)
-{
- struct affs_sb_info *sbi = AFFS_SB(sb);
- struct buffer_head *bh = sbi->s_root_bh;
- struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
-
- tail->bm_flag = cpu_to_be32(clean);
- secs_to_datestamp(get_seconds(), &tail->disk_change);
- affs_fix_checksum(sb, bh);
- mark_buffer_dirty(bh);
- if (wait)
- sync_dirty_buffer(bh);
-}
-
-static void
-affs_put_super(struct super_block *sb)
-{
- struct affs_sb_info *sbi = AFFS_SB(sb);
- pr_debug("AFFS: put_super()\n");
-
- if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt)
- affs_commit_super(sb, 1, 1);
-
- kfree(sbi->s_prefix);
- affs_free_bitmap(sb);
- affs_brelse(sbi->s_root_bh);
- kfree(sbi);
- sb->s_fs_info = NULL;
-}
-
-static void
-affs_write_super(struct super_block *sb)
-{
- lock_super(sb);
- if (!(sb->s_flags & MS_RDONLY))
- affs_commit_super(sb, 1, 2);
- sb->s_dirt = 0;
- unlock_super(sb);
-
- pr_debug("AFFS: write_super() at %lu, clean=2\n", get_seconds());
-}
-
-static int
-affs_sync_fs(struct super_block *sb, int wait)
-{
- lock_super(sb);
- affs_commit_super(sb, wait, 2);
- sb->s_dirt = 0;
- unlock_super(sb);
- return 0;
-}
-
-static struct kmem_cache * affs_inode_cachep;
-
-static struct inode *affs_alloc_inode(struct super_block *sb)
-{
- struct affs_inode_info *i;
-
- i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
- if (!i)
- return NULL;
-
- i->vfs_inode.i_version = 1;
- i->i_lc = NULL;
- i->i_ext_bh = NULL;
- i->i_pa_cnt = 0;
-
- return &i->vfs_inode;
-}
-
-static void affs_i_callback(struct rcu_head *head)
-{
- struct inode *inode = container_of(head, struct inode, i_rcu);
- kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
-}
-
-static void affs_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, affs_i_callback);
-}
-
-static void init_once(void *foo)
-{
- struct affs_inode_info *ei = (struct affs_inode_info *) foo;
-
- sema_init(&ei->i_link_lock, 1);
- sema_init(&ei->i_ext_lock, 1);
- inode_init_once(&ei->vfs_inode);
-}
-
-static int init_inodecache(void)
-{
- affs_inode_cachep = kmem_cache_create("affs_inode_cache",
- sizeof(struct affs_inode_info),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD),
- init_once);
- if (affs_inode_cachep == NULL)
- return -ENOMEM;
- return 0;
-}
-
-static void destroy_inodecache(void)
-{
- kmem_cache_destroy(affs_inode_cachep);
-}
-
-static const struct super_operations affs_sops = {
- .alloc_inode = affs_alloc_inode,
- .destroy_inode = affs_destroy_inode,
- .write_inode = affs_write_inode,
- .evict_inode = affs_evict_inode,
- .put_super = affs_put_super,
- .write_super = affs_write_super,
- .sync_fs = affs_sync_fs,
- .statfs = affs_statfs,
- .remount_fs = affs_remount,
- .show_options = generic_show_options,
-};
-
-enum {
- Opt_bs, Opt_mode, Opt_mufs, Opt_prefix, Opt_protect,
- Opt_reserved, Opt_root, Opt_setgid, Opt_setuid,
- Opt_verbose, Opt_volume, Opt_ignore, Opt_err,
-};
-
-static const match_table_t tokens = {
- {Opt_bs, "bs=%u"},
- {Opt_mode, "mode=%o"},
- {Opt_mufs, "mufs"},
- {Opt_prefix, "prefix=%s"},
- {Opt_protect, "protect"},
- {Opt_reserved, "reserved=%u"},
- {Opt_root, "root=%u"},
- {Opt_setgid, "setgid=%u"},
- {Opt_setuid, "setuid=%u"},
- {Opt_verbose, "verbose"},
- {Opt_volume, "volume=%s"},
- {Opt_ignore, "grpquota"},
- {Opt_ignore, "noquota"},
- {Opt_ignore, "quota"},
- {Opt_ignore, "usrquota"},
- {Opt_err, NULL},
-};
-
-static int
-parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s32 *root,
- int *blocksize, char **prefix, char *volume, unsigned long *mount_opts)
-{
- char *p;
- substring_t args[MAX_OPT_ARGS];
-
- /* Fill in defaults */
-
- *uid = current_uid();
- *gid = current_gid();
- *reserved = 2;
- *root = -1;
- *blocksize = -1;
- volume[0] = ':';
- volume[1] = 0;
- *mount_opts = 0;
- if (!options)
- return 1;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token, n, option;
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_bs:
- if (match_int(&args[0], &n))
- return 0;
- if (n != 512 && n != 1024 && n != 2048
- && n != 4096) {
- printk ("AFFS: Invalid blocksize (512, 1024, 2048, 4096 allowed)\n");
- return 0;
- }
- *blocksize = n;
- break;
- case Opt_mode:
- if (match_octal(&args[0], &option))
- return 0;
- *mode = option & 0777;
- *mount_opts |= SF_SETMODE;
- break;
- case Opt_mufs:
- *mount_opts |= SF_MUFS;
- break;
- case Opt_prefix:
- *prefix = match_strdup(&args[0]);
- if (!*prefix)
- return 0;
- *mount_opts |= SF_PREFIX;
- break;
- case Opt_protect:
- *mount_opts |= SF_IMMUTABLE;
- break;
- case Opt_reserved:
- if (match_int(&args[0], reserved))
- return 0;
- break;
- case Opt_root:
- if (match_int(&args[0], root))
- return 0;
- break;
- case Opt_setgid:
- if (match_int(&args[0], &option))
- return 0;
- *gid = option;
- *mount_opts |= SF_SETGID;
- break;
- case Opt_setuid:
- if (match_int(&args[0], &option))
- return 0;
- *uid = option;
- *mount_opts |= SF_SETUID;
- break;
- case Opt_verbose:
- *mount_opts |= SF_VERBOSE;
- break;
- case Opt_volume: {
- char *vol = match_strdup(&args[0]);
- if (!vol)
- return 0;
- strlcpy(volume, vol, 32);
- kfree(vol);
- break;
- }
- case Opt_ignore:
- /* Silently ignore the quota options */
- break;
- default:
- printk("AFFS: Unrecognized mount option \"%s\" "
- "or missing value\n", p);
- return 0;
- }
- }
- return 1;
-}
-
-/* This function definitely needs to be split up. Some fine day I'll
- * hopefully have the guts to do so. Until then: sorry for the mess.
- */
-
-static int affs_fill_super(struct super_block *sb, void *data, int silent)
-{
- struct affs_sb_info *sbi;
- struct buffer_head *root_bh = NULL;
- struct buffer_head *boot_bh;
- struct inode *root_inode = NULL;
- s32 root_block;
- int size, blocksize;
- u32 chksum;
- int num_bm;
- int i, j;
- s32 key;
- uid_t uid;
- gid_t gid;
- int reserved;
- unsigned long mount_flags;
- int tmp_flags; /* fix remount prototype... */
- u8 sig[4];
- int ret = -EINVAL;
-
- save_mount_options(sb, data);
-
- pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
-
- sb->s_magic = AFFS_SUPER_MAGIC;
- sb->s_op = &affs_sops;
- sb->s_flags |= MS_NODIRATIME;
-
- sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
- return -ENOMEM;
-
- sb->s_fs_info = sbi;
- mutex_init(&sbi->s_bmlock);
- spin_lock_init(&sbi->symlink_lock);
-
- if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
- &blocksize,&sbi->s_prefix,
- sbi->s_volume, &mount_flags)) {
- printk(KERN_ERR "AFFS: Error parsing options\n");
- kfree(sbi->s_prefix);
- kfree(sbi);
- return -EINVAL;
- }
- /* N.B. after this point s_prefix must be released */
-
- sbi->s_flags = mount_flags;
- sbi->s_mode = i;
- sbi->s_uid = uid;
- sbi->s_gid = gid;
- sbi->s_reserved= reserved;
-
- /* Get the size of the device in 512-byte blocks.
- * If we later see that the partition uses bigger
- * blocks, we will have to change it.
- */
-
- size = sb->s_bdev->bd_inode->i_size >> 9;
- pr_debug("AFFS: initial blocksize=%d, #blocks=%d\n", 512, size);
-
- affs_set_blocksize(sb, PAGE_SIZE);
- /* Try to find root block. Its location depends on the block size. */
-
- i = 512;
- j = 4096;
- if (blocksize > 0) {
- i = j = blocksize;
- size = size / (blocksize / 512);
- }
- for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) {
- sbi->s_root_block = root_block;
- if (root_block < 0)
- sbi->s_root_block = (reserved + size - 1) / 2;
- pr_debug("AFFS: setting blocksize to %d\n", blocksize);
- affs_set_blocksize(sb, blocksize);
- sbi->s_partition_size = size;
-
- /* The root block location that was calculated above is not
- * correct if the partition size is an odd number of 512-
- * byte blocks, which will be rounded down to a number of
- * 1024-byte blocks, and if there were an even number of
- * reserved blocks. Ideally, all partition checkers should
- * report the real number of blocks of the real blocksize,
- * but since this just cannot be done, we have to try to
- * find the root block anyways. In the above case, it is one
- * block behind the calculated one. So we check this one, too.
- */
- for (num_bm = 0; num_bm < 2; num_bm++) {
- pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, "
- "size=%d, reserved=%d\n",
- sb->s_id,
- sbi->s_root_block + num_bm,
- blocksize, size, reserved);
- root_bh = affs_bread(sb, sbi->s_root_block + num_bm);
- if (!root_bh)
- continue;
- if (!affs_checksum_block(sb, root_bh) &&
- be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT &&
- be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) {
- sbi->s_hashsize = blocksize / 4 - 56;
- sbi->s_root_block += num_bm;
- key = 1;
- goto got_root;
- }
- affs_brelse(root_bh);
- root_bh = NULL;
- }
- }
- if (!silent)
- printk(KERN_ERR "AFFS: No valid root block on device %s\n",
- sb->s_id);
- goto out_error;
-
- /* N.B. after this point bh must be released */
-got_root:
- root_block = sbi->s_root_block;
-
- /* Find out which kind of FS we have */
- boot_bh = sb_bread(sb, 0);
- if (!boot_bh) {
- printk(KERN_ERR "AFFS: Cannot read boot block\n");
- goto out_error;
- }
- memcpy(sig, boot_bh->b_data, 4);
- brelse(boot_bh);
- chksum = be32_to_cpu(*(__be32 *)sig);
-
- /* Dircache filesystems are compatible with non-dircache ones
- * when reading. As long as they aren't supported, writing is
- * not recommended.
- */
- if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS
- || chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) {
- printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n",
- sb->s_id);
- sb->s_flags |= MS_RDONLY;
- }
- switch (chksum) {
- case MUFS_FS:
- case MUFS_INTLFFS:
- case MUFS_DCFFS:
- sbi->s_flags |= SF_MUFS;
- /* fall thru */
- case FS_INTLFFS:
- case FS_DCFFS:
- sbi->s_flags |= SF_INTL;
- break;
- case MUFS_FFS:
- sbi->s_flags |= SF_MUFS;
- break;
- case FS_FFS:
- break;
- case MUFS_OFS:
- sbi->s_flags |= SF_MUFS;
- /* fall thru */
- case FS_OFS:
- sbi->s_flags |= SF_OFS;
- sb->s_flags |= MS_NOEXEC;
- break;
- case MUFS_DCOFS:
- case MUFS_INTLOFS:
- sbi->s_flags |= SF_MUFS;
- case FS_DCOFS:
- case FS_INTLOFS:
- sbi->s_flags |= SF_INTL | SF_OFS;
- sb->s_flags |= MS_NOEXEC;
- break;
- default:
- printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n",
- sb->s_id, chksum);
- goto out_error;
- }
-
- if (mount_flags & SF_VERBOSE) {
- u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0];
- printk(KERN_NOTICE "AFFS: Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n",
- len > 31 ? 31 : len,
- AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1,
- sig, sig[3] + '0', blocksize);
- }
-
- sb->s_flags |= MS_NODEV | MS_NOSUID;
-
- sbi->s_data_blksize = sb->s_blocksize;
- if (sbi->s_flags & SF_OFS)
- sbi->s_data_blksize -= 24;
-
- /* Keep super block in cache */
- sbi->s_root_bh = root_bh;
- /* N.B. after this point s_root_bh must be released */
-
- tmp_flags = sb->s_flags;
- if (affs_init_bitmap(sb, &tmp_flags))
- goto out_error;
- sb->s_flags = tmp_flags;
-
- /* set up enough so that it can read an inode */
-
- root_inode = affs_iget(sb, root_block);
- if (IS_ERR(root_inode)) {
- ret = PTR_ERR(root_inode);
- goto out_error;
- }
-
- if (AFFS_SB(sb)->s_flags & SF_INTL)
- sb->s_d_op = &affs_intl_dentry_operations;
- else
- sb->s_d_op = &affs_dentry_operations;
-
- sb->s_root = d_make_root(root_inode);
- if (!sb->s_root) {
- printk(KERN_ERR "AFFS: Get root inode failed\n");
- goto out_error;
- }
-
- pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
- return 0;
-
- /*
- * Begin the cascaded cleanup ...
- */
-out_error:
- kfree(sbi->s_bitmap);
- affs_brelse(root_bh);
- kfree(sbi->s_prefix);
- kfree(sbi);
- sb->s_fs_info = NULL;
- return ret;
-}
-
-static int
-affs_remount(struct super_block *sb, int *flags, char *data)
-{
- struct affs_sb_info *sbi = AFFS_SB(sb);
- int blocksize;
- uid_t uid;
- gid_t gid;
- int mode;
- int reserved;
- int root_block;
- unsigned long mount_flags;
- int res = 0;
- char *new_opts = kstrdup(data, GFP_KERNEL);
- char volume[32];
- char *prefix = NULL;
-
- pr_debug("AFFS: remount(flags=0x%x,opts=\"%s\")\n",*flags,data);
-
- *flags |= MS_NODIRATIME;
-
- memcpy(volume, sbi->s_volume, 32);
- if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block,
- &blocksize, &prefix, volume,
- &mount_flags)) {
- kfree(prefix);
- kfree(new_opts);
- return -EINVAL;
- }
-
- replace_mount_options(sb, new_opts);
-
- sbi->s_flags = mount_flags;
- sbi->s_mode = mode;
- sbi->s_uid = uid;
- sbi->s_gid = gid;
- /* protect against readers */
- spin_lock(&sbi->symlink_lock);
- if (prefix) {
- kfree(sbi->s_prefix);
- sbi->s_prefix = prefix;
- }
- memcpy(sbi->s_volume, volume, 32);
- spin_unlock(&sbi->symlink_lock);
-
- if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
- return 0;
-
- if (*flags & MS_RDONLY) {
- affs_write_super(sb);
- affs_free_bitmap(sb);
- } else
- res = affs_init_bitmap(sb, flags);
-
- return res;
-}
-
-static int
-affs_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
- struct super_block *sb = dentry->d_sb;
- int free;
- u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
-
- pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,
- AFFS_SB(sb)->s_reserved);
-
- free = affs_count_free_blocks(sb);
- buf->f_type = AFFS_SUPER_MAGIC;
- buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = AFFS_SB(sb)->s_partition_size - AFFS_SB(sb)->s_reserved;
- buf->f_bfree = free;
- buf->f_bavail = free;
- buf->f_fsid.val[0] = (u32)id;
- buf->f_fsid.val[1] = (u32)(id >> 32);
- buf->f_namelen = 30;
- return 0;
-}
-
-static struct dentry *affs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, affs_fill_super);
-}
-
-static struct file_system_type affs_fs_type = {
- .owner = THIS_MODULE,
- .name = "affs",
- .mount = affs_mount,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-
-static int __init init_affs_fs(void)
-{
- int err = init_inodecache();
- if (err)
- goto out1;
- err = register_filesystem(&affs_fs_type);
- if (err)
- goto out;
- return 0;
-out:
- destroy_inodecache();
-out1:
- return err;
-}
-
-static void __exit exit_affs_fs(void)
-{
- unregister_filesystem(&affs_fs_type);
- destroy_inodecache();
-}
-
-MODULE_DESCRIPTION("Amiga filesystem support for Linux");
-MODULE_LICENSE("GPL");
-
-module_init(init_affs_fs)
-module_exit(exit_affs_fs)