struct super_block *
afs_read_super(struct super_block *sb, void *data, int silent)
{
int code = 0;
AFS_GLOCK();
if (afs_was_mounted) {
printf
("You must reload the AFS kernel extensions before remounting AFS.\n");
AFS_GUNLOCK();
return NULL;
}
afs_was_mounted = 1;
/* Set basics of super_block */
#if !defined(AFS_LINUX24_ENV)
lock_super(sb);
#endif
MOD_INC_USE_COUNT;
afs_globalVFS = sb;
sb->s_flags |= MS_NOATIME;
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = AFS_VFSMAGIC;
sb->s_op = &afs_sops; /* Super block (vfs) ops */
#if defined(MAX_NON_LFS)
#ifdef AFS_64BIT_CLIENT
#if !defined(MAX_LFS_FILESIZE)
#if BITS_PER_LONG==32
#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
#elif BITS_PER_LONG==64
#define MAX_LFS_FILESIZE 0x7fffffffffffffff
#endif
#endif
sb->s_maxbytes = MAX_LFS_FILESIZE;
#else
sb->s_maxbytes = MAX_NON_LFS;
#endif
#endif
code = afs_root(sb);
if (code) {
afs_globalVFS = NULL;
MOD_DEC_USE_COUNT;
}
#if !defined(AFS_LINUX24_ENV)
unlock_super(sb);
#endif
AFS_GUNLOCK();
return code ? NULL : sb;
}
int
afs_fill_super(struct super_block *sb, void *data, int silent)
{
int code = 0;
#if defined(HAVE_LINUX_BDI_INIT)
int bdi_init_done = 0;
#endif
AFS_GLOCK();
if (afs_was_mounted) {
printf
("You must reload the AFS kernel extensions before remounting AFS.\n");
AFS_GUNLOCK();
return -EINVAL;
}
afs_was_mounted = 1;
/* Set basics of super_block */
__module_get(THIS_MODULE);
afs_globalVFS = sb;
sb->s_flags |= MS_NOATIME;
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = AFS_VFSMAGIC;
sb->s_op = &afs_sops; /* Super block (vfs) ops */
#if defined(STRUCT_SUPER_BLOCK_HAS_S_D_OP)
sb->s_d_op = &afs_dentry_operations;
#endif
/* used for inodes backing_dev_info field, also */
afs_backing_dev_info = kzalloc(sizeof(struct backing_dev_info), GFP_NOFS);
#if defined(HAVE_LINUX_BDI_INIT)
code = bdi_init(afs_backing_dev_info);
if (code)
goto out;
bdi_init_done = 1;
#endif
#if defined(STRUCT_BACKING_DEV_INFO_HAS_NAME)
afs_backing_dev_info->name = "openafs";
#endif
afs_backing_dev_info->ra_pages = 32;
#if defined (STRUCT_SUPER_BLOCK_HAS_S_BDI)
sb->s_bdi = afs_backing_dev_info;
/* The name specified here will appear in the flushing thread name - flush-afs */
bdi_register(afs_backing_dev_info, NULL, "afs");
#endif
#if !defined(AFS_NONFSTRANS)
sb->s_export_op = &afs_export_ops;
#endif
#if defined(MAX_NON_LFS)
#ifdef AFS_64BIT_CLIENT
#if !defined(MAX_LFS_FILESIZE)
#if BITS_PER_LONG==32
#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
#elif BITS_PER_LONG==64
#define MAX_LFS_FILESIZE 0x7fffffffffffffff
#endif
#endif
sb->s_maxbytes = MAX_LFS_FILESIZE;
#else
sb->s_maxbytes = MAX_NON_LFS;
#endif
#endif
code = afs_root(sb);
out:
if (code) {
afs_globalVFS = NULL;
afs_FlushAllVCaches();
#if defined(HAVE_LINUX_BDI_INIT)
if (bdi_init_done)
bdi_destroy(afs_backing_dev_info);
#endif
kfree(afs_backing_dev_info);
module_put(THIS_MODULE);
}
AFS_GUNLOCK();
return code ? -EINVAL : 0;
}