From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: 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! --- fs/coda/inode.c | 321 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 321 insertions(+) create mode 100644 fs/coda/inode.c (limited to 'fs/coda/inode.c') diff --git a/fs/coda/inode.c b/fs/coda/inode.c new file mode 100644 index 00000000000..04a73fb4848 --- /dev/null +++ b/fs/coda/inode.c @@ -0,0 +1,321 @@ +/* + * Super block/filesystem wide operations + * + * Copyright (C) 1996 Peter J. Braam and + * Michael Callahan + * + * Rewritten for Linux 2.1. Peter Braam + * Copyright (C) Carnegie Mellon University + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include +#include +#include +#include +#include + +/* VFS super_block ops */ +static void coda_clear_inode(struct inode *); +static void coda_put_super(struct super_block *); +static int coda_statfs(struct super_block *sb, struct kstatfs *buf); + +static kmem_cache_t * coda_inode_cachep; + +static struct inode *coda_alloc_inode(struct super_block *sb) +{ + struct coda_inode_info *ei; + ei = (struct coda_inode_info *)kmem_cache_alloc(coda_inode_cachep, SLAB_KERNEL); + if (!ei) + return NULL; + memset(&ei->c_fid, 0, sizeof(struct CodaFid)); + ei->c_flags = 0; + ei->c_uid = 0; + ei->c_cached_perm = 0; + return &ei->vfs_inode; +} + +static void coda_destroy_inode(struct inode *inode) +{ + kmem_cache_free(coda_inode_cachep, ITOC(inode)); +} + +static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) +{ + struct coda_inode_info *ei = (struct coda_inode_info *) foo; + + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) + inode_init_once(&ei->vfs_inode); +} + +int coda_init_inodecache(void) +{ + coda_inode_cachep = kmem_cache_create("coda_inode_cache", + sizeof(struct coda_inode_info), + 0, SLAB_RECLAIM_ACCOUNT, + init_once, NULL); + if (coda_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +void coda_destroy_inodecache(void) +{ + if (kmem_cache_destroy(coda_inode_cachep)) + printk(KERN_INFO "coda_inode_cache: not all structures were freed\n"); +} + +static int coda_remount(struct super_block *sb, int *flags, char *data) +{ + *flags |= MS_NODIRATIME; + return 0; +} + +/* exported operations */ +static struct super_operations coda_super_operations = +{ + .alloc_inode = coda_alloc_inode, + .destroy_inode = coda_destroy_inode, + .clear_inode = coda_clear_inode, + .put_super = coda_put_super, + .statfs = coda_statfs, + .remount_fs = coda_remount, +}; + +static int get_device_index(struct coda_mount_data *data) +{ + struct file *file; + struct inode *inode; + int idx; + + if(data == NULL) { + printk("coda_read_super: Bad mount data\n"); + return -1; + } + + if(data->version != CODA_MOUNT_VERSION) { + printk("coda_read_super: Bad mount version\n"); + return -1; + } + + file = fget(data->fd); + inode = NULL; + if(file) + inode = file->f_dentry->d_inode; + + if(!inode || !S_ISCHR(inode->i_mode) || + imajor(inode) != CODA_PSDEV_MAJOR) { + if(file) + fput(file); + + printk("coda_read_super: Bad file\n"); + return -1; + } + + idx = iminor(inode); + fput(file); + + if(idx < 0 || idx >= MAX_CODADEVS) { + printk("coda_read_super: Bad minor number\n"); + return -1; + } + + return idx; +} + +static int coda_fill_super(struct super_block *sb, void *data, int silent) +{ + struct inode *root = NULL; + struct coda_sb_info *sbi = NULL; + struct venus_comm *vc = NULL; + struct CodaFid fid; + int error; + int idx; + + idx = get_device_index((struct coda_mount_data *) data); + + /* Ignore errors in data, for backward compatibility */ + if(idx == -1) + idx = 0; + + printk(KERN_INFO "coda_read_super: device index: %i\n", idx); + + vc = &coda_comms[idx]; + if (!vc->vc_inuse) { + printk("coda_read_super: No pseudo device\n"); + return -EINVAL; + } + + if ( vc->vc_sb ) { + printk("coda_read_super: Device already mounted\n"); + return -EBUSY; + } + + sbi = kmalloc(sizeof(struct coda_sb_info), GFP_KERNEL); + if(!sbi) { + return -ENOMEM; + } + + vc->vc_sb = sb; + + sbi->sbi_vcomm = vc; + + sb->s_fs_info = sbi; + sb->s_flags |= MS_NODIRATIME; /* probably even noatime */ + sb->s_blocksize = 1024; /* XXXXX what do we put here?? */ + sb->s_blocksize_bits = 10; + sb->s_magic = CODA_SUPER_MAGIC; + sb->s_op = &coda_super_operations; + + /* get root fid from Venus: this needs the root inode */ + error = venus_rootfid(sb, &fid); + if ( error ) { + printk("coda_read_super: coda_get_rootfid failed with %d\n", + error); + goto error; + } + printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid)); + + /* make root inode */ + error = coda_cnode_make(&root, &fid, sb); + if ( error || !root ) { + printk("Failure of coda_cnode_make for root: error %d\n", error); + goto error; + } + + printk("coda_read_super: rootinode is %ld dev %s\n", + root->i_ino, root->i_sb->s_id); + sb->s_root = d_alloc_root(root); + if (!sb->s_root) + goto error; + return 0; + + error: + if (sbi) { + kfree(sbi); + if(vc) + vc->vc_sb = NULL; + } + if (root) + iput(root); + + return -EINVAL; +} + +static void coda_put_super(struct super_block *sb) +{ + struct coda_sb_info *sbi; + + sbi = coda_sbp(sb); + sbi->sbi_vcomm->vc_sb = NULL; + + printk("Coda: Bye bye.\n"); + kfree(sbi); +} + +static void coda_clear_inode(struct inode *inode) +{ + coda_cache_clear_inode(inode); +} + +int coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) +{ + int err = coda_revalidate_inode(dentry); + if (!err) + generic_fillattr(dentry->d_inode, stat); + return err; +} + +int coda_setattr(struct dentry *de, struct iattr *iattr) +{ + struct inode *inode = de->d_inode; + struct coda_vattr vattr; + int error; + + lock_kernel(); + + memset(&vattr, 0, sizeof(vattr)); + + inode->i_ctime = CURRENT_TIME_SEC; + coda_iattr_to_vattr(iattr, &vattr); + vattr.va_type = C_VNON; /* cannot set type */ + + /* Venus is responsible for truncating the container-file!!! */ + error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr); + + if ( !error ) { + coda_vattr_to_iattr(inode, &vattr); + coda_cache_clear_inode(inode); + } + + unlock_kernel(); + + return error; +} + +struct inode_operations coda_file_inode_operations = { + .permission = coda_permission, + .getattr = coda_getattr, + .setattr = coda_setattr, +}; + +static int coda_statfs(struct super_block *sb, struct kstatfs *buf) +{ + int error; + + lock_kernel(); + + error = venus_statfs(sb, buf); + + unlock_kernel(); + + if (error) { + /* fake something like AFS does */ + buf->f_blocks = 9000000; + buf->f_bfree = 9000000; + buf->f_bavail = 9000000; + buf->f_files = 9000000; + buf->f_ffree = 9000000; + } + + /* and fill in the rest */ + buf->f_type = CODA_SUPER_MAGIC; + buf->f_bsize = 1024; + buf->f_namelen = CODA_MAXNAMLEN; + + return 0; +} + +/* init_coda: used by filesystems.c to register coda */ + +static struct super_block *coda_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return get_sb_nodev(fs_type, flags, data, coda_fill_super); +} + +struct file_system_type coda_fs_type = { + .owner = THIS_MODULE, + .name = "coda", + .get_sb = coda_get_sb, + .kill_sb = kill_anon_super, + .fs_flags = FS_BINARY_MOUNTDATA, +}; + -- cgit v1.2.3