+++ /dev/null
-
-/*
- * OBDFS Super operations
- *
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
- *
- * 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.
- * Copryright (C) 2002 Cluster File Systems, Inc.
- *
- */
-
-#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 <asm/uaccess.h>
-#include <linux/vmalloc.h>
-#include <asm/segment.h>
-
-#define DEBUG_SUBSYSTEM S_OBDFS
-
-#include <linux/obd_support.h>
-#include <linux/obd_class.h>
-#include <linux/obdfs.h>
-
-struct list_head obdfs_super_list;
-extern struct address_space_operations obdfs_aops;
-struct super_operations obdfs_super_operations;
-long obdfs_cache_count = 0;
-long obdfs_mutex_start = 0;
-
-static char *obdfs_read_opt(const char *opt, char *data)
-{
- 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, strlen(value) + 1);
- if ( !retval ) {
- CERROR("out of memory!\n");
- return NULL;
- }
-
- memcpy(retval, value, strlen(value)+1);
- CDEBUG(D_SUPER, "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 struct super_block * obdfs_read_super(struct super_block *sb,
- void *data, int silent)
-{
- struct inode *root = 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 connected = 0;
- int devno;
- int err;
- unsigned long blocksize;
- unsigned long blocksize_bits;
- obd_id root_ino;
- int scratch;
- struct obdo *oa;
-
- ENTRY;
- MOD_INC_USE_COUNT;
-
- memset(sbi, 0, sizeof(*sbi));
-
- CDEBUG(D_INFO, "\n");
- obdfs_options(data, &device, &version);
- if (!device) {
- CERROR("no device\n");
- EXIT;
- goto ERR;
- }
-
- devno = simple_strtoul(device, NULL, 0);
- CDEBUG(D_INFO, "\n");
- if (devno >= MAX_OBD_DEVICES) {
- CERROR("device of %s too high (%d)\n", device, devno);
- EXIT;
- goto ERR;
- }
-
- CDEBUG(D_INFO, "\n");
-
- obddev = &obd_dev[devno];
- sbi->osi_obd = obddev;
-
- err = obd_connect(&sbi->osi_conn, obddev);
- if (err) {
- CERROR("OBDFS: cannot connect to %s\n", device);
- EXIT;
- goto ERR;
- }
-
- connected = 1;
- CDEBUG(D_INFO, "\n");
- /* list of dirty inodes, and a mutex to hold while modifying it */
- INIT_LIST_HEAD(&sbi->osi_inodes);
- init_MUTEX (&sbi->osi_list_mutex);
-
- CDEBUG(D_INFO, "\n");
- sbi->osi_super = sb;
-
- CDEBUG(D_INFO, "\n");
- err = obd_get_info(&sbi->osi_conn, strlen("blocksize"),
- "blocksize", &scratch,
- (void *)&blocksize);
- if (err) {
- CERROR("getinfo call to drive failed (blocksize)\n");
- EXIT;
- goto ERR;
- }
-
- CDEBUG(D_INFO, "\n");
- err = obd_get_info(&sbi->osi_conn, strlen("blocksize_bits"),
- "blocksize_bits", &scratch,
- (void *)&blocksize_bits);
- if (err) {
- CERROR("getinfo call to drive failed (blocksize_bits)\n");
- EXIT;
- goto ERR;
- }
-
- CDEBUG(D_INFO, "\n");
- err = obd_get_info(&sbi->osi_conn, strlen("root_ino"),
- "root_ino", &scratch, (void *)&root_ino);
- if (err) {
- CERROR("getinfo call to drive failed (root_ino)\n");
- EXIT;
- goto ERR;
- }
-
- CDEBUG(D_INFO, "\n");
- sb->s_maxbytes = 1LL << 36;
- CERROR("Max bytes: %Lx\n", sb->s_maxbytes);
- sb->s_blocksize = PAGE_SIZE;
- sb->s_blocksize_bits = (unsigned char)PAGE_SHIFT;
- sb->s_magic = OBDFS_SUPER_MAGIC;
- sb->s_op = &obdfs_super_operations;
-
- /* XXX how to get "sb->s_flags |= MS_RDONLY" here for snapshots? */
-
- /* make root inode */
- CDEBUG(D_INFO, "\n");
- oa = obdo_fromid(&sbi->osi_conn, root_ino, S_IFDIR,
- (__u32)(OBD_MD_FLNOTOBD | OBD_MD_FLBLOCKS));
- CDEBUG(D_INFO, "mode %o\n", oa->o_mode);
- if (IS_ERR(oa)) {
- CERROR("obdo_fromid failed\n");
- iput(root);
- EXIT;
- goto ERR;
- }
- CDEBUG(D_INFO, "\n");
- root = iget4(sb, (ino_t)root_ino, NULL, oa);
- obdo_free(oa);
- CDEBUG(D_INFO, "\n");
- if (!root) {
- CERROR("OBDFS: bad iget4 for root\n");
- sb->s_dev = 0;
- err = -ENOENT;
- EXIT;
- goto ERR;
- }
-
- CDEBUG(D_INFO, "sbdev %d, rootino: %Ld, dev %s, "
- "minor: %d, blocksize: %ld, blocksize bits %ld\n",
- sb->s_dev, (long long)root_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;
-
-ERR:
- MOD_DEC_USE_COUNT;
- if (device)
- OBD_FREE(device, strlen(device) + 1);
- if (version)
- OBD_FREE(version, strlen(version) + 1);
- if (connected)
- obd_disconnect(&sbi->osi_conn);
-
- 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;
-
- sbi = (struct obdfs_sb_info *) &sb->u.generic_sbp;
- //obdfs_flush_reqs(&sbi->osi_inodes, ~0UL);
-
- obd_disconnect(ID(sb));
- list_del(&sbi->osi_list);
-
- CERROR("OBDFS: Bye bye.\n");
-
- MOD_DEC_USE_COUNT;
- EXIT;
-} /* obdfs_put_super */
-
-
-void obdfs_do_change_inode(struct inode *inode, int valid)
-{
- struct obdo *oa;
- int err;
-
- ENTRY;
- oa = obdo_alloc();
- if ( !oa ) {
- CERROR("obdo_alloc failed\n");
- EXIT;
- return;
- }
-
- oa->o_valid = OBD_MD_FLNOTOBD & (valid | OBD_MD_FLID);
- obdfs_from_inode(oa, inode);
- oa->o_mode = inode->i_mode;
- err = obd_setattr(IID(inode), oa);
-
- if ( err )
- CERROR("obd_setattr fails (%d)\n", err);
-
- EXIT;
- obdo_free(oa);
-} /* obdfs_write_inode */
-
-void obdfs_change_inode(struct inode *inode, int mask)
-{
- return obdfs_do_change_inode(inode, OBD_MD_FLNLINK);
-}
-
-
-extern void write_inode_pages(struct 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)
-{
- ENTRY;
- if (inode->i_nlink && (atomic_read(&inode->i_count) == 1)) {
- write_inode_pages(inode);
- EXIT;
- return;
- }
-
- //obdfs_dequeue_pages(inode);
- EXIT;
-} /* obdfs_put_inode */
-
-
-static void obdfs_delete_inode(struct inode *inode)
-{
- obdfs_do_change_inode(inode, ~0);
- clear_inode(inode);
-}
-#if 0
-{
- struct obdo *oa;
- int err;
-
- ENTRY;
- oa = obdo_alloc();
- if ( !oa ) {
- CERROR("obdo_alloc failed\n");
- EXIT;
- return;
- }
- oa->o_valid = OBD_MD_FLNOTOBD;
- obdfs_from_inode(oa, inode);
-
- /* XXX how do we know that this inode is now clean? */
- CERROR("delete_inode ------> link %d\n", inode->i_nlink);
- ODEBUG(oa);
- err = obd_destroy(IID(inode), oa);
- obdo_free(oa);
- clear_inode(inode);
- if (err) {
- CERROR("obd_destroy fails (%d)\n", err);
- EXIT;
- return;
- }
-
- EXIT;
-} /* obdfs_delete_inode */
-#endif
-
-
-static int obdfs_attr2inode(struct inode * inode, struct iattr * attr)
-{
- unsigned int ia_valid = attr->ia_valid;
- int error = 0;
-
- if (ia_valid & ATTR_SIZE) {
- error = vmtruncate(inode, attr->ia_size);
- if (error)
- goto out;
- }
-
- if (ia_valid & ATTR_UID)
- inode->i_uid = attr->ia_uid;
- if (ia_valid & ATTR_GID)
- inode->i_gid = attr->ia_gid;
- if (ia_valid & ATTR_ATIME)
- inode->i_atime = attr->ia_atime;
- if (ia_valid & ATTR_MTIME)
- inode->i_mtime = attr->ia_mtime;
- if (ia_valid & ATTR_CTIME)
- inode->i_ctime = attr->ia_ctime;
- if (ia_valid & ATTR_MODE) {
- inode->i_mode = attr->ia_mode;
- if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
- inode->i_mode &= ~S_ISGID;
- }
-out:
- return error;
-}
-
-int obdfs_setattr(struct dentry *de, struct iattr *attr)
-{
- struct inode *inode = de->d_inode;
- struct obdo *oa;
- int err;
-
- ENTRY;
- oa = obdo_alloc();
- if ( !oa ) {
- CERROR("obdo_alloc failed\n");
- return -ENOMEM;
- }
-
- obdfs_attr2inode(inode, attr);
- oa->o_id = inode->i_ino;
- oa->o_mode = inode->i_mode;
- obdo_from_iattr(oa, attr);
- err = obd_setattr(IID(inode), oa);
-
- if ( err )
- CERROR("obd_setattr fails (%d)\n", err);
-
- EXIT;
- obdo_free(oa);
- return err;
-} /* obdfs_setattr */
-
-
-
-static int obdfs_statfs(struct super_block *sb, struct statfs *sfs)
-{
- int rc;
-
- ENTRY;
-
- rc = obd_statfs(ID(sb), sfs);
- if (rc)
- CERROR("obd_statfs fails: rc = %d\n", rc);
- else
- CDEBUG(D_SUPER, "statfs returns avail %ld\n", sfs->f_bavail);
-
- RETURN(rc);
-}
-
-static inline void obdfs_read_inode2(struct inode *inode, void *opaque)
-{
- struct obdo *oa = opaque;
-
- ENTRY;
- 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 */
-
- /* 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;
- inode->i_mapping->a_ops = &obdfs_aops;
- 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]);
- }
-
- EXIT;
- return;
-}
-
-/* exported operations */
-struct super_operations obdfs_super_operations =
-{
- read_inode2: obdfs_read_inode2,
- 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)
-{
- //int err;
-
- printk(KERN_INFO "OBDFS v0.1, info@clusterfs.com\n");
-
- obdfs_sysctl_init();
-
- INIT_LIST_HEAD(&obdfs_super_list);
- //err = obdfs_init_pgrqcache();
- //if (err)
- //return err;
-
- //obdfs_flushd_init();
- return register_filesystem(&obdfs_fs_type);
-}
-
-
-
-
-#ifdef MODULE
-int init_module(void)
-{
- return init_obdfs();
-}
-
-void cleanup_module(void)
-{
- ENTRY;
-
- //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;
-}
-
-#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff