* OBDFS Super operations
*
* Copryright (C) 1996 Peter J. Braam <braam@stelias.com>
+ * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
+ * Copryright (C) 1999 Seagate Technology Inc.
+ * Copryright (C) 2001 Mountain View Data, Inc.
+ *
*/
#define EXPORT_SYMTAB
#include <linux/vmalloc.h>
#include <asm/segment.h>
-#include <../obd/linux/sim_obd.h>
-#include <obdfs.h>
+#include <linux/obd_support.h>
+#include <linux/obd_class.h>
+#include <linux/obdfs.h>
-/* VFS super_block ops */
-static struct super_block *obdfs_read_super(struct super_block *, void *, int);
-static void obdfs_read_inode(struct inode *);
-static int obdfs_notify_change(struct dentry *dentry, struct iattr *attr);
-static void obdfs_write_inode(struct inode *);
-static void obdfs_delete_inode(struct inode *);
-static void obdfs_put_super(struct super_block *);
-static int obdfs_statfs(struct super_block *sb, struct statfs *buf,
- int bufsiz);
+struct list_head obdfs_super_list;
+struct address_space_operations obdfs_aops;
+struct super_operations obdfs_super_operations;
+long obdfs_cache_count = 0;
+long obdfs_mutex_start = 0;
+long obd_memory = 0;
-/* exported operations */
-struct super_operations obdfs_super_operations =
+static char *obdfs_read_opt(const char *opt, char *data)
{
- obdfs_read_inode, /* read_inode */
- obdfs_write_inode, /* write_inode */
- NULL, /* put_inode */
- obdfs_delete_inode, /* delete_inode */
- obdfs_notify_change, /* notify_change */
- obdfs_put_super, /* put_super */
- NULL, /* write_super */
- obdfs_statfs, /* statfs */
- NULL /* remount_fs */
-};
+ char *value;
+ char *retval;
+
+ CDEBUG(D_INFO, "option: %s, data %s\n", opt, data);
+ if ( strncmp(opt, data, strlen(opt)) )
+ return NULL;
+
+ if ( (value = strchr(data, '=')) == NULL )
+ return NULL;
+
+ value++;
+ OBD_ALLOC(retval, char *, strlen(value) + 1);
+ if ( !retval ) {
+ printk(KERN_ALERT __FUNCTION__ ": out of memory!\n");
+ return NULL;
+ }
+
+ memcpy(retval, value, strlen(value)+1);
+ CDEBUG(D_PSDEV, "Assigned option: %s, value %s\n", opt, retval);
+ return retval;
+}
+
+static void obdfs_options(char *options, char **dev, char **vers)
+{
+ char *this_char;
+
+ if (!options)
+ return;
+
+ for (this_char = strtok (options, ",");
+ this_char != NULL;
+ this_char = strtok (NULL, ",")) {
+ CDEBUG(D_INFO, "this_char %s\n", this_char);
+ if ( (!*dev && (*dev = obdfs_read_opt("device", this_char)))||
+ (!*vers && (*vers = obdfs_read_opt("version", this_char))) )
+ continue;
+
+ }
+}
+
+static int obdfs_getdev(char *devpath, int *dev)
+{
+ struct dentry *dentry;
+ kdev_t devno;
+ struct nameidata nd;
+ int error = 0;
+
+ ENTRY;
+ if (path_init(devpath, LOOKUP_POSITIVE, &nd))
+ error = path_walk(devpath, &nd);
+ if (error)
+ return error;
+
+ dentry = nd.dentry;
+ if (!S_ISCHR(dentry->d_inode->i_mode))
+ return -ENODEV;
+
+ devno = dentry->d_inode->i_rdev;
+ if ( MAJOR(devno) != OBD_PSDEV_MAJOR )
+ return -ENODEV;
+
+ if ( MINOR(devno) >= MAX_OBD_DEVICES )
+ return -ENODEV;
+
+ *dev = devno;
+ return 0;
+}
-struct obdfs_sb_info obdfs_super_info;
-int obd_minor = 0;
-int obd_root_ino = 2;
static struct super_block * obdfs_read_super(struct super_block *sb,
- void *data, int silent)
+ void *data, int silent)
{
struct inode *root = 0;
- struct obdfs_sb_info *sbi = NULL;
- int error = 0;
+ struct obdfs_sb_info *sbi = (struct obdfs_sb_info *)(&sb->u.generic_sbp);
+ struct obd_device *obddev;
+ char *device = NULL;
+ char *version = NULL;
+ int devno;
+ int err;
+ unsigned long blocksize;
+ unsigned long blocksize_bits;
+ unsigned long root_ino;
+ int scratch;
+
- ENTRY;
+ ENTRY;
MOD_INC_USE_COUNT;
+
+ memset(sbi, 0, sizeof(*sbi));
+
+ CDEBUG(D_INFO, "\n");
+ obdfs_options(data, &device, &version);
+ if ( !device ) {
+ printk(__FUNCTION__ ": no device\n");
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ if ( (err = obdfs_getdev(device, &devno)) ) {
+ printk("Cannot get devno of %s, error %d\n", device, err);
+ EXIT;
+ goto ERR;;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ if ( MAJOR(devno) != OBD_PSDEV_MAJOR ) {
+ printk(__FUNCTION__ ": wrong major number %d!\n", MAJOR(devno));
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ if ( MINOR(devno) >= MAX_OBD_DEVICES ) {
+ printk(__FUNCTION__ ": minor of %s too high (%d)\n",
+ device, MINOR(devno));
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ obddev = &obd_dev[MINOR(devno)];
+
+ CDEBUG(D_INFO, "\n");
+ if ( ! (obddev->obd_flags & OBD_ATTACHED) ||
+ ! (obddev->obd_flags & OBD_SET_UP) ){
+ printk("device %s not attached or not set up (%d)\n",
+ device, MINOR(devno));
+ EXIT;
+ goto ERR;;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ sbi->osi_obd = obddev;
+ sbi->osi_ops = sbi->osi_obd->obd_type->typ_ops;
+
+ sbi->osi_conn.oc_dev = obddev;
+ err = sbi->osi_ops->o_connect(&sbi->osi_conn);
+ if ( err ) {
+ printk("OBDFS: cannot connect to %s\n", device);
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ /* list of dirty inodes, and a mutex to hold while modifying it */
+ INIT_LIST_HEAD(&sbi->osi_inodes);
+ sema_init(&sbi->osi_list_mutex, 1);
+
+ CDEBUG(D_INFO, "\n");
+ sbi->osi_super = sb;
+
+ CDEBUG(D_INFO, "\n");
+ err = sbi->osi_ops->o_get_info(&sbi->osi_conn, strlen("blocksize"),
+ "blocksize", &scratch,
+ (void *)&blocksize);
+ if ( err ) {
+ printk("getinfo call to drive failed (blocksize)\n");
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ err = sbi->osi_ops->o_get_info(&sbi->osi_conn, strlen("blocksize_bits"),
+ "blocksize_bits", &scratch,
+ (void *)&blocksize_bits);
+ if ( err ) {
+ printk("getinfo call to drive failed (blocksize_bits)\n");
+ EXIT;
+ goto ERR;
+ }
- sbi = &obdfs_super_info;
-
- if ( sbi->osi_super ) {
- printk("Already mounted\n");
- MOD_DEC_USE_COUNT;
- return NULL;
- }
-
- error = obd_connect(obd_minor, &sbi->osi_conn_info);
- if ( error ) {
- printk("OBDFS: cannot connect to 0x%x.\n", obd_minor);
- goto error;
- }
- sbi->osi_super = sb;
-
- lock_super(sb);
- sb->u.generic_sbp = sbi;
- sb->s_blocksize = sbi->osi_conn_info.conn_blocksize;
- sb->s_blocksize_bits = sbi->osi_conn_info.conn_blocksize_bits;
+ CDEBUG(D_INFO, "\n");
+ err = sbi->osi_ops->o_get_info(&sbi->osi_conn, strlen("root_ino"),
+ "root_ino", &scratch, (void *)&root_ino);
+ if ( err ) {
+ printk("getinfo call to drive failed (root_ino)\n");
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "\n");
+ sb->s_blocksize = blocksize;
+ sb->s_blocksize_bits = (unsigned char)blocksize_bits;
sb->s_magic = OBDFS_SUPER_MAGIC;
sb->s_op = &obdfs_super_operations;
- /* make root inode */
- root = iget(sb, sbi->osi_conn_info.conn_ino);
+ /* XXX how to get "sb->s_flags |= MS_RDONLY" here for snapshots? */
+
+ /* make root inode */
+ CDEBUG(D_INFO, "\n");
+ root = iget(sb, root_ino);
if (!root || is_bad_inode(root)) {
- printk("OBDFS: bad iget for root\n");
- sb->s_dev = 0;
- error = ENOENT;
- unlock_super(sb);
- goto error;
- }
-
- printk("obdfs_read_super: rootinode is %ld dev %d\n",
- root->i_ino, root->i_dev);
- sb->s_root = d_alloc_root(root, NULL);
- unlock_super(sb);
- EXIT;
+ printk("OBDFS: bad iget for root\n");
+ sb->s_dev = 0;
+ err = -ENOENT;
+ EXIT;
+ goto ERR;
+ }
+
+ CDEBUG(D_INFO, "obdfs_read_super: sbdev %d, rootino: %ld, dev %s, "
+ "minor: %d, blocksize: %ld, blocksize bits %ld\n",
+ sb->s_dev, root->i_ino, device, MINOR(devno),
+ blocksize, blocksize_bits);
+ sb->s_root = d_alloc_root(root);
+ list_add(&sbi->osi_list, &obdfs_super_list);
+ OBD_FREE(device, strlen(device) + 1);
+ if (version)
+ OBD_FREE(version, strlen(version) + 1);
+ EXIT;
return sb;
- error:
- EXIT;
- MOD_DEC_USE_COUNT;
- if (sbi) {
- sbi->osi_super = NULL;
- }
+ERR:
+ MOD_DEC_USE_COUNT;
+ if (device)
+ OBD_FREE(device, strlen(device) + 1);
+ if (version)
+ OBD_FREE(version, strlen(version) + 1);
+ if (sbi) {
+ sbi->osi_super = NULL;
+ }
if (root) {
iput(root);
}
sb->s_dev = 0;
return NULL;
-}
+} /* obdfs_read_super */
+
static void obdfs_put_super(struct super_block *sb)
{
struct obdfs_sb_info *sbi;
ENTRY;
-
-
sb->s_dev = 0;
-
- /* XXX flush stuff */
- sbi = sb->u.generic_sbp;
- sb->u.generic_sbp = NULL;
- obd_disconnect(sbi->osi_conn_info.conn_id);
- sbi->osi_super = NULL;
+
+ sbi = (struct obdfs_sb_info *) &sb->u.generic_sbp;
+ obdfs_flush_reqs(&sbi->osi_inodes, ~0UL);
-
- printk("OBDFS: Bye bye.\n");
- memset(sbi, 0, sizeof(* sbi));
+ OPS(sb,disconnect)(ID(sb));
+ list_del(&sbi->osi_list);
+ memset(sbi, 0, sizeof(*sbi));
+
+ printk(KERN_INFO "OBDFS: Bye bye.\n");
MOD_DEC_USE_COUNT;
- EXIT;
-}
+ EXIT;
+} /* obdfs_put_super */
+
/* all filling in of inodes postponed until lookup */
static void obdfs_read_inode(struct inode *inode)
{
- struct iattr attr;
- int error;
- struct obdfs_sb_info *sbi = inode->i_sb->u.generic_sbp;
- ENTRY;
-
- error = obd_getattr(sbi->osi_conn_info.conn_id, inode->i_ino, &attr);
- if (error) {
- printk("obdfs_read_inode: ibd_getattr fails (%d)\n", error);
- return;
- }
-
- inode_setattr(inode, &attr);
- inode->i_op = NULL;
- return;
-}
+ struct obdo *oa;
+
+ ENTRY;
+ oa = obdo_fromid(IID(inode), inode->i_ino,
+ OBD_MD_FLNOTOBD | OBD_MD_FLBLOCKS);
+ if ( IS_ERR(oa) ) {
+ printk(__FUNCTION__ ": obdo_fromid failed\n");
+ EXIT;
+ return /* PTR_ERR(oa) */;
+ }
+
+ ODEBUG(oa);
+ obdfs_to_inode(inode, oa);
+ INIT_LIST_HEAD(obdfs_iplist(inode)); /* list of dirty pages on inode */
+ INIT_LIST_HEAD(obdfs_islist(inode)); /* list of inodes in superblock */
+
+ obdo_free(oa);
+ /* OIDEBUG(inode); */
+
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &obdfs_file_inode_operations;
+ inode->i_fop = &obdfs_file_operations;
+ inode->i_mapping->a_ops = &obdfs_aops;
+ EXIT;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &obdfs_dir_inode_operations;
+ inode->i_fop = &obdfs_dir_operations;
+ EXIT;
+ } else if (S_ISLNK(inode->i_mode)) {
+ if (inode->i_blocks) {
+ inode->i_op = &obdfs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &obdfs_aops;
+ }else {
+ inode->i_op = &obdfs_fast_symlink_inode_operations;
+ }
+ EXIT;
+ } else {
+ init_special_inode(inode, inode->i_mode,
+ ((int *)obdfs_i2info(inode)->oi_inline)[0]);
+ }
+
+ return;
+} /* obdfs_read_inode */
-static void inode_to_iattr(struct inode *inode, struct iattr *tmp)
+static void obdfs_write_inode(struct inode *inode, int wait)
{
- tmp->ia_mode = inode->i_mode;
- tmp->ia_uid = inode->i_uid;
- tmp->ia_gid = inode->i_gid;
- tmp->ia_size = inode->i_size;
- tmp->ia_atime = inode->i_atime;
- tmp->ia_mtime = inode->i_mtime;
- tmp->ia_ctime = inode->i_ctime;
- tmp->ia_attr_flags = inode->i_flags;
-
- tmp->ia_valid = ~0;
-}
+ struct obdo *oa;
+ int err;
+
+ ENTRY;
+ if (IOPS(inode, setattr) == NULL) {
+ printk(KERN_ERR __FUNCTION__ ": no setattr method!\n");
+ EXIT;
+ return;
+ }
+ oa = obdo_alloc();
+ if ( !oa ) {
+ printk(__FUNCTION__ ": obdo_alloc failed\n");
+ EXIT;
+ return;
+ }
+
+ oa->o_valid = OBD_MD_FLNOTOBD;
+ obdfs_from_inode(oa, inode);
+ err = IOPS(inode, setattr)(IID(inode), oa);
+
+ if ( err )
+ printk(__FUNCTION__ ": obd_setattr fails (%d)\n", err);
-static void obdfs_write_inode(struct inode *inode)
+ EXIT;
+ obdo_free(oa);
+} /* obdfs_write_inode */
+
+
+/* This routine is called from iput() (for each unlink on the inode).
+ * We can't put this call into delete_inode() since that is called only
+ * when i_count == 0, and we need to keep a reference on the inode while
+ * it is in the page cache, which means i_count > 0. Catch 22.
+ */
+static void obdfs_put_inode(struct inode *inode)
{
- struct obdfs_sb_info *sbi;
- struct iattr attr;
- int error;
- ENTRY;
-
- inode_to_iattr(inode, &attr);
- sbi = inode->i_sb->u.generic_sbp;
- error = obd_setattr(sbi->osi_conn_info.conn_id, inode->i_ino, &attr);
- if (error) {
- printk("obdfs_write_inode: ibd_setattr fails (%d)\n", error);
- return;
- }
-
- return;
-}
+ ENTRY;
+ if (inode->i_nlink) {
+ EXIT;
+ return;
+ }
+
+ obdfs_dequeue_pages(inode);
+ EXIT;
+} /* obdfs_put_inode */
+
static void obdfs_delete_inode(struct inode *inode)
{
- struct obdfs_sb_info *sbi;
- int error;
+ struct obdo *oa;
+ int err;
+
ENTRY;
+ if (IOPS(inode, destroy) == NULL) {
+ printk(KERN_ERR __FUNCTION__ ": no destroy method!\n");
+ EXIT;
+ return;
+ }
- sbi = inode->i_sb->u.generic_sbp;
- error = obd_destroy(sbi->osi_conn_info.conn_id , inode->i_ino);
- if (error) {
- printk("obdfs_delete_node: ibd_destroy fails (%d)\n", error);
- return;
- }
+ oa = obdo_alloc();
+ if ( !oa ) {
+ printk(__FUNCTION__ ": obdo_alloc failed\n");
+ EXIT;
+ return;
+ }
+ oa->o_valid = OBD_MD_FLNOTOBD;
+ obdfs_from_inode(oa, inode);
+
+ ODEBUG(oa);
+ err = IOPS(inode, destroy)(IID(inode), oa);
+ obdo_free(oa);
+ clear_inode(inode);
+ if (err) {
+ printk(__FUNCTION__ ": obd_destroy fails (%d)\n", err);
+ EXIT;
+ return;
+ }
- EXIT;
-}
+ EXIT;
+} /* obdfs_delete_inode */
-static int obdfs_notify_change(struct dentry *de, struct iattr *iattr)
+
+int obdfs_notify_change(struct dentry *de, struct iattr *attr)
{
- struct inode *inode = de->d_inode;
- struct obdfs_sb_info * sbi;
- int error;
-
- ENTRY;
-
- sbi = inode->i_sb->u.generic_sbp;
- error = obd_setattr(sbi->osi_conn_info.conn_id, inode->i_ino, iattr);
- if ( error ) {
- printk("obdfs_notify_change: obd_setattr fails (%d)\n", error);
- return error;
- } else {
- inode_setattr(inode, iattr);
- }
- EXIT;
- return error;
-}
+ struct inode *inode = de->d_inode;
+ struct obdo *oa;
+ int err;
+ ENTRY;
+ if (IOPS(inode, setattr) == NULL) {
+ printk(KERN_ERR __FUNCTION__ ": no setattr method!\n");
+ EXIT;
+ return -EIO;
+ }
+ oa = obdo_alloc();
+ if ( !oa ) {
+ printk(__FUNCTION__ ": obdo_alloc failed\n");
+ return -ENOMEM;
+ }
+
+ oa->o_id = inode->i_ino;
+ obdo_from_iattr(oa, attr);
+ err = IOPS(inode, setattr)(IID(inode), oa);
+
+ if ( err )
+ printk(__FUNCTION__ ": obd_setattr fails (%d)\n", err);
+
+ EXIT;
+ obdo_free(oa);
+ return err;
+} /* obdfs_notify_change */
-static int obdfs_statfs(struct super_block *sb, struct statfs *buf,
- int bufsize)
+
+static int obdfs_statfs(struct super_block *sb, struct statfs *buf)
{
- struct statfs tmp;
- struct obdfs_sb_info * sbi;
- int error;
+ struct statfs tmp;
+ int bufsize = sizeof(*buf);
+ int err;
- ENTRY;
+ ENTRY;
- sbi = sb->u.generic_sbp;
- error = obd_statfs(sbi->osi_conn_info.conn_id, &tmp);
- if ( error ) {
- printk("obdfs_notify_change: obd_statfs fails (%d)\n", error);
- return error;
- }
- copy_to_user(buf, &tmp, (bufsize<sizeof(tmp)) ? bufsize : sizeof(tmp));
+ err = OPS(sb,statfs)(ID(sb), &tmp);
+ if ( err ) {
+ printk(__FUNCTION__ ": obd_statfs fails (%d)\n", err);
+ return err;
+ }
+ copy_to_user(buf, &tmp, (bufsize<sizeof(tmp)) ? bufsize : sizeof(tmp));
- EXIT;
+ EXIT;
- return error;
+ return err;
}
+/* exported operations */
+struct super_operations obdfs_super_operations =
+{
+ read_inode: obdfs_read_inode,
+ write_inode: obdfs_write_inode,
+ put_inode: obdfs_put_inode,
+ delete_inode: obdfs_delete_inode,
+ put_super: obdfs_put_super,
+ statfs: obdfs_statfs
+};
+
struct file_system_type obdfs_fs_type = {
"obdfs", 0, obdfs_read_super, NULL
};
int init_obdfs(void)
{
- printk(KERN_INFO "OBDFS v0.1, braam@stelias.com\n");
+ int err;
+
+ printk(KERN_INFO "OBDFS v0.1, braam@stelias.com\n");
+
+ obdfs_sysctl_init();
+
+ INIT_LIST_HEAD(&obdfs_super_list);
+ err = obdfs_init_pgrqcache();
+ if (err)
+ return err;
- obdfs_sysctl_init();
- return register_filesystem(&obdfs_fs_type);
+ obdfs_flushd_init();
+ return register_filesystem(&obdfs_fs_type);
}
+struct address_space_operations obdfs_aops = {
+ readpage: obdfs_readpage,
+ writepage: obdfs_writepage,
+ sync_page: block_sync_page,
+ prepare_write: obdfs_prepare_write,
+ commit_write: obdfs_commit_write,
+ bmap: NULL
+};
+
#ifdef MODULE
int init_module(void)
{
- return init_obdfs();
+ return init_obdfs();
}
void cleanup_module(void)
{
ENTRY;
- obdfs_sysctl_clean();
- unregister_filesystem(&obdfs_fs_type);
+ obdfs_flushd_cleanup();
+ obdfs_sysctl_clean();
+ obdfs_cleanup_pgrqcache();
+ unregister_filesystem(&obdfs_fs_type);
+ CDEBUG(D_MALLOC, "OBDFS mem used %ld\n", obd_memory);
+ EXIT;
}
-void obdfs_psdev_dec_use_count(void)
-{
- MOD_DEC_USE_COUNT;
-}
-
-EXPORT_SYMBOL(obdfs_psdev_dec_use_count);
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff