summaryrefslogtreecommitdiffstats
path: root/fs/coda/super.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/coda/super.c')
-rw-r--r--fs/coda/super.c612
1 files changed, 612 insertions, 0 deletions
diff --git a/fs/coda/super.c b/fs/coda/super.c
new file mode 100644
index 000000000..85a5ccbb3
--- /dev/null
+++ b/fs/coda/super.c
@@ -0,0 +1,612 @@
+/*
+ * Super block/filesystem wide operations
+ *
+ * Peter J. Braam <braam@maths.ox.ac.uk>,
+ * Michael Callahan <callahan@maths.ox.ac.uk> Aug 1996
+ * Rewritten for Linux 2.1.57 Peter Braam <braam@cs.cmu.edu>
+ */
+
+#define __NO_VERSION__
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/locks.h>
+#include <linux/unistd.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/locks.h>
+#include <linux/string.h>
+#include <asm/uaccess.h>
+#include <linux/vmalloc.h>
+#include <asm/segment.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_psdev.h>
+#include <linux/coda_cnode.h>
+#include <linux/coda_namecache.h>
+
+
+/* VFS super_block ops */
+static struct super_block *coda_read_super(struct super_block *, void *, int);
+static void coda_read_inode(struct inode *);
+static int coda_notify_change(struct inode *inode, struct iattr *attr);
+static void coda_put_inode(struct inode *);
+static void coda_delete_inode(struct inode *);
+static void coda_put_super(struct super_block *);
+static int coda_statfs(struct super_block *sb, struct statfs *buf,
+ int bufsiz);
+
+
+/* helper functions */
+void print_vattr( struct coda_vattr *attr );
+static inline struct coda_sb_info *coda_psinode2sb(struct inode *inode);
+static inline struct vcomm *coda_psinode2vcomm(struct inode *inode);
+static int coda_get_psdev(void *, struct inode **);
+static void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
+static void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
+int coda_fetch_inode(struct inode *, struct coda_vattr *);
+
+extern inline struct vcomm *coda_psdev_vcomm(struct inode *inode);
+extern int coda_cnode_make(struct inode **inode, ViceFid *fid,
+ struct super_block *sb);
+extern struct cnode *coda_cnode_alloc(void);
+extern void coda_cnode_free(struct cnode *);
+char *coda_f2s(struct ViceFid *, char *);
+
+extern int cfsnc_initialized;
+extern int coda_debug;
+extern int coda_print_entry;
+
+extern struct inode_operations coda_file_inode_operations;
+extern struct inode_operations coda_dir_inode_operations;
+extern struct inode_operations coda_ioctl_inode_operations;
+extern struct inode_operations coda_symlink_inode_operations;
+/* exported operations */
+struct super_operations coda_super_operations =
+{
+ coda_read_inode, /* read_inode */
+ NULL, /* write_inode */
+ coda_put_inode, /* put_inode */
+ coda_delete_inode, /* delete_inode */
+ coda_notify_change, /* notify_change */
+ coda_put_super, /* put_super */
+ NULL, /* write_super */
+ coda_statfs, /* statfs */
+ NULL /* remount_fs */
+};
+
+/*
+ * globals
+ */
+struct coda_sb_info coda_super_info[MAX_CODADEVS];
+
+
+
+static struct super_block * coda_read_super(struct super_block *sb,
+ void *data, int silent)
+{
+ struct inode *psdev = 0, *root = 0;
+ struct coda_sb_info *sbi = NULL;
+ struct vcomm *vc;
+ ViceFid fid;
+ kdev_t dev = sb->s_dev;
+ int error;
+ char str[50];
+
+ENTRY;
+ MOD_INC_USE_COUNT;
+ if (coda_get_psdev(data, &psdev))
+ goto exit;
+
+ vc = coda_psinode2vcomm(psdev);
+ if ( !vc )
+ goto exit;
+
+ sbi = coda_psinode2sb(psdev);
+ if ( !sbi )
+ goto exit;
+
+ sbi->sbi_psdev = psdev;
+ sbi->sbi_vcomm = vc;
+
+ lock_super(sb);
+ sb->u.generic_sbp = sbi;
+ sb->s_blocksize = 1024; /* XXXXX */
+ sb->s_blocksize_bits = 10;
+ sb->s_magic = CODA_SUPER_MAGIC;
+ sb->s_dev = dev;
+ sb->s_op = &coda_super_operations;
+
+ /* get root fid from Venus: this needs the root inode */
+ error = venus_rootfid(sb, &fid);
+
+ if ( error ) {
+ unlock_super(sb);
+ printk("coda_read_super: coda_get_rootfid failed with %d\n",
+ error);
+ goto exit;
+ }
+ printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid, str));
+
+ error = coda_cnode_make(&root, &fid, sb);
+ if ( error || !root ) {
+ printk("Failure of coda_cnode_make for root: error %d\n", error);
+ unlock_super(sb);
+ sb->s_dev = 0;
+ root = NULL;
+ goto exit;
+ }
+
+ printk("coda_read_super: rootinode is %ld dev %d\n",
+ root->i_ino, root->i_dev);
+ sbi->sbi_root = root;
+ sb->s_root = d_alloc_root(root, NULL);
+ unlock_super(sb);
+ return sb;
+EXIT;
+
+exit:
+ MOD_DEC_USE_COUNT;
+ sbi->sbi_vcomm = NULL;
+ sbi->sbi_root = NULL;
+ if (root) {
+ iput(root);
+ coda_cnode_free(ITOC(root));
+ }
+ sb->s_dev = 0;
+ return NULL;
+}
+
+
+static void coda_put_super(struct super_block *sb)
+{
+ struct coda_sb_info *sb_info;
+
+ ENTRY;
+
+ lock_super(sb);
+
+ sb->s_dev = 0;
+ sb_info = coda_sbp(sb);
+ memset(sb_info, 0, sizeof(* sb_info));
+
+ unlock_super(sb);
+ MOD_DEC_USE_COUNT;
+EXIT;
+}
+/* all filling in of inodes postponed until lookup */
+static void coda_read_inode(struct inode *inode)
+{
+ inode->u.generic_ip = NULL;
+ /* inode->i_blksize = inode->i_sb->s_blocksize;
+ inode->i_mode = 0;
+ inode->i_op = NULL;
+ NFS_CACHEINV(inode); */
+}
+
+static void coda_put_inode(struct inode *inode)
+{
+ CDEBUG(D_INODE,"ino: %ld, cnp: %x\n", inode->i_ino,
+ (int) inode->u.generic_ip);
+}
+
+static void coda_delete_inode(struct inode *inode)
+{
+ struct cnode *cnp;
+ struct inode *open_inode;
+
+ ENTRY;
+ CDEBUG(D_SUPER, " inode->ino: %ld, count: %d\n",
+ inode->i_ino, inode->i_count);
+
+ if ( inode->i_ino == CTL_INO ) {
+ clear_inode(inode);
+ return;
+ }
+
+ cnp = ITOC(inode);
+
+ open_inode = cnp->c_ovp;
+ if ( open_inode ) {
+ CDEBUG(D_SUPER, "DELINO cached file: ino %ld count %d.\n",
+ open_inode->i_ino, open_inode->i_count);
+ cnp->c_ovp = NULL;
+ cnp->c_odentry.d_inode = NULL;
+ iput( open_inode );
+ }
+ inode->u.generic_ip = NULL;
+ coda_cnode_free(cnp);
+ clear_inode(inode);
+EXIT;
+}
+
+static int coda_notify_change(struct inode *inode, struct iattr *iattr)
+{
+ struct cnode *cnp;
+ struct coda_vattr vattr;
+ int error;
+ENTRY;
+ memset(&vattr, 0, sizeof(vattr));
+ cnp = ITOC(inode);
+ CHECK_CNODE(cnp);
+
+ coda_iattr_to_vattr(iattr, &vattr);
+ vattr.va_type = VNON; /* cannot set type */
+ CDEBUG(D_SUPER, "vattr.va_mode %o\n", vattr.va_mode);
+
+ error = venus_setattr(inode->i_sb, &cnp->c_fid, &vattr);
+
+ if ( !error ) {
+ coda_vattr_to_iattr(inode, &vattr);
+ cfsnc_zapfid(&(cnp->c_fid));
+ }
+ CDEBUG(D_SUPER, "inode.i_mode %o, error %d\n",
+ inode->i_mode, error);
+
+ EXIT;
+ return error;
+}
+
+/* we need _something_ */
+static int coda_statfs(struct super_block *sb, struct statfs *buf,
+ int bufsiz)
+{
+ struct statfs tmp;
+
+#define NB_SFS_SIZ 0x895440
+
+ tmp.f_type = CODA_SUPER_MAGIC;
+ tmp.f_bsize = 1024;
+ tmp.f_blocks = 9000000;
+ tmp.f_bfree = 9000000;
+ tmp.f_bavail = 9000000 ;
+ tmp.f_files = 9000000;
+ tmp.f_ffree = 9000000;
+ tmp.f_namelen = 0;
+ copy_to_user(buf, &tmp, bufsiz);
+ return 0;
+}
+
+
+/* init_coda: used by filesystems.c to register coda */
+
+struct file_system_type coda_fs_type = {
+ "coda", 0, coda_read_super, NULL
+};
+
+
+
+
+int init_coda_fs(void)
+{
+ return register_filesystem(&coda_fs_type);
+}
+
+
+/* utility functions below */
+static void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
+{
+ int inode_type;
+ /* inode's i_dev, i_flags, i_ino are set by iget
+ XXX: is this all we need ??
+ */
+ switch (attr->va_type) {
+ case VNON:
+ inode_type = 0;
+ break;
+ case VREG:
+ inode_type = S_IFREG;
+ break;
+ case VDIR:
+ inode_type = S_IFDIR;
+ break;
+ case VLNK:
+ inode_type = S_IFLNK;
+ break;
+ default:
+ inode_type = 0;
+ }
+ inode->i_mode |= inode_type;
+
+ if (attr->va_mode != (u_short) -1)
+ inode->i_mode = attr->va_mode | inode_type;
+ if (attr->va_uid != -1)
+ inode->i_uid = (uid_t) attr->va_uid;
+ if (attr->va_gid != -1)
+ inode->i_gid = (gid_t) attr->va_gid;
+ if (attr->va_nlink != -1)
+ inode->i_nlink = attr->va_nlink;
+ if (attr->va_size != -1)
+ inode->i_size = attr->va_size;
+ /* XXX This needs further study */
+ /*
+ inode->i_blksize = attr->va_blocksize;
+ inode->i_blocks = attr->va_size/attr->va_blocksize
+ + (attr->va_size % attr->va_blocksize ? 1 : 0);
+ */
+ if (attr->va_atime.tv_sec != -1)
+ inode->i_atime = attr->va_atime.tv_sec;
+ if (attr->va_mtime.tv_sec != -1)
+ inode->i_mtime = attr->va_mtime.tv_sec;
+ if (attr->va_ctime.tv_sec != -1)
+ inode->i_ctime = attr->va_ctime.tv_sec;
+}
+/*
+ * BSD sets attributes that need not be modified to -1.
+ * Linux uses the valid field to indicate what should be
+ * looked at. The BSD type field needs to be deduced from linux
+ * mode.
+ * So we have to do some translations here.
+ */
+
+void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
+{
+ umode_t mode;
+ unsigned int valid;
+
+ /* clean out */
+ vattr->va_mode = (umode_t) -1;
+ vattr->va_uid = (vuid_t) -1;
+ vattr->va_gid = (vgid_t) -1;
+ vattr->va_size = (off_t) -1;
+ vattr->va_atime.tv_sec = (time_t) -1;
+ vattr->va_mtime.tv_sec = (time_t) -1;
+ vattr->va_ctime.tv_sec = (time_t) -1;
+ vattr->va_atime.tv_nsec = (time_t) -1;
+ vattr->va_mtime.tv_nsec = (time_t) -1;
+ vattr->va_ctime.tv_nsec = (time_t) -1;
+ vattr->va_type = VNON;
+ vattr->va_fileid = (long)-1;
+ vattr->va_gen = (long)-1;
+ vattr->va_bytes = (long)-1;
+ vattr->va_fsid = (long)-1;
+ vattr->va_nlink = (short)-1;
+ vattr->va_blocksize = (long)-1;
+ vattr->va_rdev = (dev_t)-1;
+ vattr->va_flags = 0;
+
+ /* determine the type */
+ mode = iattr->ia_mode;
+ if ( S_ISDIR(mode) ) {
+ vattr->va_type = VDIR;
+ } else if ( S_ISREG(mode) ) {
+ vattr->va_type = VREG;
+ } else if ( S_ISLNK(mode) ) {
+ vattr->va_type = VLNK;
+ } else {
+ /* don't do others */
+ vattr->va_type = VNON;
+ }
+
+ /* set those vattrs that need change */
+ valid = iattr->ia_valid;
+ if ( valid & ATTR_MODE ) {
+ vattr->va_mode = iattr->ia_mode;
+ }
+ if ( valid & ATTR_UID ) {
+ vattr->va_uid = (vuid_t) iattr->ia_uid;
+ }
+ if ( valid & ATTR_GID ) {
+ vattr->va_gid = (vgid_t) iattr->ia_gid;
+ }
+ if ( valid & ATTR_SIZE ) {
+ vattr->va_size = iattr->ia_size;
+ }
+ if ( valid & ATTR_ATIME ) {
+ vattr->va_atime.tv_sec = iattr->ia_atime;
+ vattr->va_atime.tv_nsec = 0;
+ }
+ if ( valid & ATTR_MTIME ) {
+ vattr->va_mtime.tv_sec = iattr->ia_mtime;
+ vattr->va_mtime.tv_nsec = 0;
+ }
+ if ( valid & ATTR_CTIME ) {
+ vattr->va_ctime.tv_sec = iattr->ia_ctime;
+ vattr->va_ctime.tv_nsec = 0;
+ }
+
+}
+
+
+void print_vattr(struct coda_vattr *attr)
+{
+ char *typestr;
+
+ switch (attr->va_type) {
+ case VNON:
+ typestr = "VNON";
+ break;
+ case VREG:
+ typestr = "VREG";
+ break;
+ case VDIR:
+ typestr = "VDIR";
+ break;
+ case VBLK:
+ typestr = "VBLK";
+ break;
+ case VCHR:
+ typestr = "VCHR";
+ break;
+ case VLNK:
+ typestr = "VLNK";
+ break;
+ case VSOCK:
+ typestr = "VSCK";
+ break;
+ case VFIFO:
+ typestr = "VFFO";
+ break;
+ case VBAD:
+ typestr = "VBAD";
+ break;
+ default:
+ typestr = "????";
+ break;
+ }
+
+
+ printk("attr: type %s (%o) mode %o uid %d gid %d fsid %d rdev %d\n",
+ typestr, (int)attr->va_type, (int)attr->va_mode, (int)attr->va_uid,
+ (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev);
+
+ printk(" fileid %d nlink %d size %d blocksize %d bytes %d\n",
+ (int)attr->va_fileid, (int)attr->va_nlink,
+ (int)attr->va_size,
+ (int)attr->va_blocksize,(int)attr->va_bytes);
+ printk(" gen %ld flags %ld vaflags %d\n",
+ attr->va_gen, attr->va_flags, attr->va_vaflags);
+ printk(" atime sec %d nsec %d\n",
+ (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec);
+ printk(" mtime sec %d nsec %d\n",
+ (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec);
+ printk(" ctime sec %d nsec %d\n",
+ (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec);
+}
+
+/* */
+int coda_fetch_inode (struct inode *inode, struct coda_vattr *attr)
+{
+ struct cnode *cp;
+ int ino, error=0;
+ CDEBUG(D_SUPER, "fetch for ino: %ld\n", inode->i_ino);
+
+ ino = inode->i_ino;
+ if (!ino)
+ printk("coda_fetch_inode: inode called with i_ino = 0 (don't worry)\n");
+
+ inode->i_op = NULL;
+ inode->i_mode = 0;
+
+ cp = ITOC(inode);
+ CHECK_CNODE(cp);
+
+ /* root inode */
+ if (cp->c_fid.Volume == 0 &&
+ cp->c_fid.Vnode == 0 &&
+ cp->c_fid.Unique == 0) {
+ inode->i_ino = 1;
+ inode->i_op = NULL;
+ return 0;
+ }
+
+ if (IS_CTL_FID( &(cp->c_fid) )) {
+ /* This is the special magic control file.
+ Venus doesn't want
+ to hear a GETATTR about this! */
+ inode->i_op = &coda_ioctl_inode_operations;
+ return 0;
+ }
+
+ if ( ! attr ) {
+ printk("coda_fetch_inode: called with NULL vattr, ino %ld\n",
+ inode->i_ino);
+ return -1; /* XXX */
+ }
+
+ if (coda_debug & D_SUPER ) print_vattr(attr);
+ coda_vattr_to_iattr(inode, attr);
+
+ if (S_ISREG(inode->i_mode))
+ inode->i_op = &coda_file_inode_operations;
+ else if (S_ISDIR(inode->i_mode))
+ inode->i_op = &coda_dir_inode_operations;
+ else if (S_ISLNK(inode->i_mode))
+ inode->i_op = &coda_symlink_inode_operations;
+ else {
+ printk ("coda_read_inode: what kind of inode is this? i_mode = %o\n", inode->i_mode);
+ inode->i_op = NULL;
+ }
+ return error;
+}
+
+static inline struct vcomm *
+coda_psinode2vcomm(struct inode *inode)
+{
+
+ unsigned int minor = MINOR(inode->i_rdev);
+CDEBUG(D_PSDEV,"minor %d\n", minor);
+ if ( minor < MAX_CODADEVS )
+ return &(psdev_vcomm[minor]);
+ else
+ return NULL;
+}
+
+static inline struct coda_sb_info *
+coda_psinode2sb(struct inode *inode)
+{
+ unsigned int minor = MINOR(inode->i_rdev);
+
+CDEBUG(D_PSDEV,"minor %d\n", minor);
+ if ( minor < MAX_CODADEVS )
+ return &(coda_super_info[minor]);
+ else
+ return NULL;
+}
+
+static int
+coda_get_psdev(void *data, struct inode **res_dev)
+{
+ char **psdev_path;
+ struct inode *psdev = 0;
+ struct dentry *ent=NULL;
+
+
+ if ( ! data ) {
+ printk("coda_read_super: no data!\n");
+ goto error;
+ } else {
+ psdev_path = data;
+ }
+ ent = namei((char *) *psdev_path);
+ if (IS_ERR(ent)) {
+ printk("namei error %ld for %d\n", PTR_ERR(ent),
+ (int) psdev_path);
+ goto error;
+ }
+ psdev = ent->d_inode;
+
+
+ if (!S_ISCHR(psdev->i_mode)) {
+ printk("not a character device\n");
+ goto error;
+ }
+CDEBUG(D_PSDEV,"major %d, minor %d, count %d\n", MAJOR(psdev->i_rdev),
+ MINOR(psdev->i_rdev), psdev->i_count);
+
+ if (MAJOR(psdev->i_rdev) != CODA_PSDEV_MAJOR) {
+ printk("device %d not a Coda PSDEV device\n",
+ MAJOR(psdev->i_rdev));
+ goto error;
+ }
+
+ if (MINOR(psdev->i_rdev) >= MAX_CODADEVS) {
+ printk("minor %d not an allocated Coda PSDEV\n",
+ psdev->i_rdev);
+ goto error;
+ }
+
+ if (psdev->i_count < 1) {
+ printk("coda device minor %d not open (i_count = %d)\n",
+ MINOR(psdev->i_rdev), psdev->i_count);
+ goto error;
+ }
+
+ *res_dev = psdev;
+
+ return 0;
+
+EXIT;
+error:
+ return 1;
+}