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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/efs/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/efs/super.c')
-rw-r--r--ANDROID_3.4.5/fs/efs/super.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/ANDROID_3.4.5/fs/efs/super.c b/ANDROID_3.4.5/fs/efs/super.c
deleted file mode 100644
index e755ec74..00000000
--- a/ANDROID_3.4.5/fs/efs/super.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/*
- * super.c
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/exportfs.h>
-#include <linux/slab.h>
-#include <linux/buffer_head.h>
-#include <linux/vfs.h>
-
-#include "efs.h"
-#include <linux/efs_vh.h>
-#include <linux/efs_fs_sb.h>
-
-static int efs_statfs(struct dentry *dentry, struct kstatfs *buf);
-static int efs_fill_super(struct super_block *s, void *d, int silent);
-
-static struct dentry *efs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, efs_fill_super);
-}
-
-static struct file_system_type efs_fs_type = {
- .owner = THIS_MODULE,
- .name = "efs",
- .mount = efs_mount,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-
-static struct pt_types sgi_pt_types[] = {
- {0x00, "SGI vh"},
- {0x01, "SGI trkrepl"},
- {0x02, "SGI secrepl"},
- {0x03, "SGI raw"},
- {0x04, "SGI bsd"},
- {SGI_SYSV, "SGI sysv"},
- {0x06, "SGI vol"},
- {SGI_EFS, "SGI efs"},
- {0x08, "SGI lv"},
- {0x09, "SGI rlv"},
- {0x0A, "SGI xfs"},
- {0x0B, "SGI xfslog"},
- {0x0C, "SGI xlv"},
- {0x82, "Linux swap"},
- {0x83, "Linux native"},
- {0, NULL}
-};
-
-
-static struct kmem_cache * efs_inode_cachep;
-
-static struct inode *efs_alloc_inode(struct super_block *sb)
-{
- struct efs_inode_info *ei;
- ei = (struct efs_inode_info *)kmem_cache_alloc(efs_inode_cachep, GFP_KERNEL);
- if (!ei)
- return NULL;
- return &ei->vfs_inode;
-}
-
-static void efs_i_callback(struct rcu_head *head)
-{
- struct inode *inode = container_of(head, struct inode, i_rcu);
- kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
-}
-
-static void efs_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, efs_i_callback);
-}
-
-static void init_once(void *foo)
-{
- struct efs_inode_info *ei = (struct efs_inode_info *) foo;
-
- inode_init_once(&ei->vfs_inode);
-}
-
-static int init_inodecache(void)
-{
- efs_inode_cachep = kmem_cache_create("efs_inode_cache",
- sizeof(struct efs_inode_info),
- 0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
- init_once);
- if (efs_inode_cachep == NULL)
- return -ENOMEM;
- return 0;
-}
-
-static void destroy_inodecache(void)
-{
- kmem_cache_destroy(efs_inode_cachep);
-}
-
-static void efs_put_super(struct super_block *s)
-{
- kfree(s->s_fs_info);
- s->s_fs_info = NULL;
-}
-
-static int efs_remount(struct super_block *sb, int *flags, char *data)
-{
- *flags |= MS_RDONLY;
- return 0;
-}
-
-static const struct super_operations efs_superblock_operations = {
- .alloc_inode = efs_alloc_inode,
- .destroy_inode = efs_destroy_inode,
- .put_super = efs_put_super,
- .statfs = efs_statfs,
- .remount_fs = efs_remount,
-};
-
-static const struct export_operations efs_export_ops = {
- .fh_to_dentry = efs_fh_to_dentry,
- .fh_to_parent = efs_fh_to_parent,
- .get_parent = efs_get_parent,
-};
-
-static int __init init_efs_fs(void) {
- int err;
- printk("EFS: "EFS_VERSION" - http://aeschi.ch.eu.org/efs/\n");
- err = init_inodecache();
- if (err)
- goto out1;
- err = register_filesystem(&efs_fs_type);
- if (err)
- goto out;
- return 0;
-out:
- destroy_inodecache();
-out1:
- return err;
-}
-
-static void __exit exit_efs_fs(void) {
- unregister_filesystem(&efs_fs_type);
- destroy_inodecache();
-}
-
-module_init(init_efs_fs)
-module_exit(exit_efs_fs)
-
-static efs_block_t efs_validate_vh(struct volume_header *vh) {
- int i;
- __be32 cs, *ui;
- int csum;
- efs_block_t sblock = 0; /* shuts up gcc */
- struct pt_types *pt_entry;
- int pt_type, slice = -1;
-
- if (be32_to_cpu(vh->vh_magic) != VHMAGIC) {
- /*
- * assume that we're dealing with a partition and allow
- * read_super() to try and detect a valid superblock
- * on the next block.
- */
- return 0;
- }
-
- ui = ((__be32 *) (vh + 1)) - 1;
- for(csum = 0; ui >= ((__be32 *) vh);) {
- cs = *ui--;
- csum += be32_to_cpu(cs);
- }
- if (csum) {
- printk(KERN_INFO "EFS: SGI disklabel: checksum bad, label corrupted\n");
- return 0;
- }
-
-#ifdef DEBUG
- printk(KERN_DEBUG "EFS: bf: \"%16s\"\n", vh->vh_bootfile);
-
- for(i = 0; i < NVDIR; i++) {
- int j;
- char name[VDNAMESIZE+1];
-
- for(j = 0; j < VDNAMESIZE; j++) {
- name[j] = vh->vh_vd[i].vd_name[j];
- }
- name[j] = (char) 0;
-
- if (name[0]) {
- printk(KERN_DEBUG "EFS: vh: %8s block: 0x%08x size: 0x%08x\n",
- name,
- (int) be32_to_cpu(vh->vh_vd[i].vd_lbn),
- (int) be32_to_cpu(vh->vh_vd[i].vd_nbytes));
- }
- }
-#endif
-
- for(i = 0; i < NPARTAB; i++) {
- pt_type = (int) be32_to_cpu(vh->vh_pt[i].pt_type);
- for(pt_entry = sgi_pt_types; pt_entry->pt_name; pt_entry++) {
- if (pt_type == pt_entry->pt_type) break;
- }
-#ifdef DEBUG
- if (be32_to_cpu(vh->vh_pt[i].pt_nblks)) {
- printk(KERN_DEBUG "EFS: pt %2d: start: %08d size: %08d type: 0x%02x (%s)\n",
- i,
- (int) be32_to_cpu(vh->vh_pt[i].pt_firstlbn),
- (int) be32_to_cpu(vh->vh_pt[i].pt_nblks),
- pt_type,
- (pt_entry->pt_name) ? pt_entry->pt_name : "unknown");
- }
-#endif
- if (IS_EFS(pt_type)) {
- sblock = be32_to_cpu(vh->vh_pt[i].pt_firstlbn);
- slice = i;
- }
- }
-
- if (slice == -1) {
- printk(KERN_NOTICE "EFS: partition table contained no EFS partitions\n");
-#ifdef DEBUG
- } else {
- printk(KERN_INFO "EFS: using slice %d (type %s, offset 0x%x)\n",
- slice,
- (pt_entry->pt_name) ? pt_entry->pt_name : "unknown",
- sblock);
-#endif
- }
- return sblock;
-}
-
-static int efs_validate_super(struct efs_sb_info *sb, struct efs_super *super) {
-
- if (!IS_EFS_MAGIC(be32_to_cpu(super->fs_magic)))
- return -1;
-
- sb->fs_magic = be32_to_cpu(super->fs_magic);
- sb->total_blocks = be32_to_cpu(super->fs_size);
- sb->first_block = be32_to_cpu(super->fs_firstcg);
- sb->group_size = be32_to_cpu(super->fs_cgfsize);
- sb->data_free = be32_to_cpu(super->fs_tfree);
- sb->inode_free = be32_to_cpu(super->fs_tinode);
- sb->inode_blocks = be16_to_cpu(super->fs_cgisize);
- sb->total_groups = be16_to_cpu(super->fs_ncg);
-
- return 0;
-}
-
-static int efs_fill_super(struct super_block *s, void *d, int silent)
-{
- struct efs_sb_info *sb;
- struct buffer_head *bh;
- struct inode *root;
- int ret = -EINVAL;
-
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
- return -ENOMEM;
- s->s_fs_info = sb;
-
- s->s_magic = EFS_SUPER_MAGIC;
- if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
- printk(KERN_ERR "EFS: device does not support %d byte blocks\n",
- EFS_BLOCKSIZE);
- goto out_no_fs_ul;
- }
-
- /* read the vh (volume header) block */
- bh = sb_bread(s, 0);
-
- if (!bh) {
- printk(KERN_ERR "EFS: cannot read volume header\n");
- goto out_no_fs_ul;
- }
-
- /*
- * if this returns zero then we didn't find any partition table.
- * this isn't (yet) an error - just assume for the moment that
- * the device is valid and go on to search for a superblock.
- */
- sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
- brelse(bh);
-
- if (sb->fs_start == -1) {
- goto out_no_fs_ul;
- }
-
- bh = sb_bread(s, sb->fs_start + EFS_SUPER);
- if (!bh) {
- printk(KERN_ERR "EFS: cannot read superblock\n");
- goto out_no_fs_ul;
- }
-
- if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
-#ifdef DEBUG
- printk(KERN_WARNING "EFS: invalid superblock at block %u\n", sb->fs_start + EFS_SUPER);
-#endif
- brelse(bh);
- goto out_no_fs_ul;
- }
- brelse(bh);
-
- if (!(s->s_flags & MS_RDONLY)) {
-#ifdef DEBUG
- printk(KERN_INFO "EFS: forcing read-only mode\n");
-#endif
- s->s_flags |= MS_RDONLY;
- }
- s->s_op = &efs_superblock_operations;
- s->s_export_op = &efs_export_ops;
- root = efs_iget(s, EFS_ROOTINODE);
- if (IS_ERR(root)) {
- printk(KERN_ERR "EFS: get root inode failed\n");
- ret = PTR_ERR(root);
- goto out_no_fs;
- }
-
- s->s_root = d_make_root(root);
- if (!(s->s_root)) {
- printk(KERN_ERR "EFS: get root dentry failed\n");
- ret = -ENOMEM;
- goto out_no_fs;
- }
-
- return 0;
-
-out_no_fs_ul:
-out_no_fs:
- s->s_fs_info = NULL;
- kfree(sb);
- return ret;
-}
-
-static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {
- struct super_block *sb = dentry->d_sb;
- struct efs_sb_info *sbi = SUPER_INFO(sb);
- u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
-
- buf->f_type = EFS_SUPER_MAGIC; /* efs magic number */
- buf->f_bsize = EFS_BLOCKSIZE; /* blocksize */
- buf->f_blocks = sbi->total_groups * /* total data blocks */
- (sbi->group_size - sbi->inode_blocks);
- buf->f_bfree = sbi->data_free; /* free data blocks */
- buf->f_bavail = sbi->data_free; /* free blocks for non-root */
- buf->f_files = sbi->total_groups * /* total inodes */
- sbi->inode_blocks *
- (EFS_BLOCKSIZE / sizeof(struct efs_dinode));
- buf->f_ffree = sbi->inode_free; /* free inodes */
- buf->f_fsid.val[0] = (u32)id;
- buf->f_fsid.val[1] = (u32)(id >> 32);
- buf->f_namelen = EFS_MAXNAMELEN; /* max filename length */
-
- return 0;
-}
-