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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/efs/super.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
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.c | 357 |
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; -} - |