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/*
* Intermezzo. (C) 1998 Peter J. Braam
*
* Support for journalling extended attributes
* (C) 2001 Shirish H. Phatak, Tacit Networks, Inc.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/locks.h>
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <linux/string.h>
#include <linux/smp_lock.h>
#include <linux/intermezzo_fs.h>
#include <linux/intermezzo_upcall.h>
#include <linux/intermezzo_psdev.h>
#include <linux/intermezzo_kml.h>
static int presto_log(struct presto_file_set *fset, struct rec_info *rec,
const char *buf, size_t size,
const char *string1, int len1,
const char *string2, int len2,
const char *string3, int len3);
/*
* reserve record space and/or atomically request state of the log
* rec will hold the location reserved record upon return
* this reservation will be placed in the queue
*/
static void presto_reserve_record(struct presto_file_set *fset,
struct presto_log_fd *fd,
struct rec_info *rec,
struct presto_reservation_data *rd)
{
int chunked_record = 0;
ENTRY;
write_lock(&fd->fd_lock);
if ( rec->is_kml ) {
int chunk = 1 << fset->fset_chunkbits;
int chunk_mask = ~(chunk -1);
loff_t boundary;
boundary = (fd->fd_offset + chunk - 1) & chunk_mask;
if ( fd->fd_offset + rec->size >= boundary ) {
chunked_record = 1;
fd->fd_offset = boundary;
}
}
fd->fd_recno++;
/* this move the fd_offset back after truncation */
if ( list_empty(&fd->fd_reservations) &&
!chunked_record) {
fd->fd_offset = fd->fd_file->f_dentry->d_inode->i_size;
}
rec->offset = fd->fd_offset;
rec->recno = fd->fd_recno;
fd->fd_offset += rec->size;
/* add the reservation data to the end of the list */
list_add(&rd->ri_list, fd->fd_reservations.prev);
rd->ri_offset = rec->offset;
rd->ri_size = rec->size;
rd->ri_recno = rec->recno;
write_unlock(&fd->fd_lock);
EXIT;
}
static inline void presto_release_record(struct presto_log_fd *fd,
struct presto_reservation_data *rd)
{
write_lock(&fd->fd_lock);
list_del(&rd->ri_list);
write_unlock(&fd->fd_lock);
}
static int presto_do_truncate(struct presto_file_set *fset,
struct dentry *dentry, loff_t length,
loff_t size_check)
{
struct inode *inode = dentry->d_inode;
struct inode_operations *op;
int error;
struct iattr newattrs;
ENTRY;
/* Not pretty: "inode->i_size" shouldn't really be "loff_t". */
if ((off_t) length < 0)
return -EINVAL;
fs_down(&inode->i_sem);
lock_kernel();
if (size_check != inode->i_size) {
unlock_kernel();
fs_up(&inode->i_sem);
EXIT;
return -EALREADY;
}
newattrs.ia_size = length;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
op = filter_c2cfiops(fset->fset_cache->cache_filter);
if (op != NULL && op->setattr != NULL)
error = op->setattr(dentry, &newattrs);
else {
inode_setattr(dentry->d_inode, &newattrs);
/* Some filesystems, e.g. ext2 and older versions of ext3
legitimately do not have a <fs>_setattr method. -SHP
*/
/*
printk ("Warning:: int presto_do_truncate(xxx), op->setattr == NULL");
error = -EOPNOTSUPP;
*/
error = 0;
}
unlock_kernel();
fs_up(&inode->i_sem);
EXIT;
return error;
}
void *presto_trans_start(struct presto_file_set *fset, struct inode *inode,
int op)
{
ENTRY;
if ( !fset->fset_cache->cache_filter->o_trops )
return NULL;
EXIT;
return fset->fset_cache->cache_filter->o_trops->tr_start
(fset, inode, op);
}
void presto_trans_commit(struct presto_file_set *fset, void *handle)
{
ENTRY;
if (!fset->fset_cache->cache_filter->o_trops )
return;
EXIT;
return fset->fset_cache->cache_filter->o_trops->tr_commit(fset, handle);
}
inline int presto_no_journal(struct presto_file_set *fset)
{
int minor = fset->fset_cache->cache_psdev->uc_minor;
return upc_comms[minor].uc_no_journal;
}
#define size_round(x) (((x)+3) & ~0x3)
#define BUFF_FREE(buf) PRESTO_FREE(buf, PAGE_SIZE)
#define BUFF_ALLOC(newbuf, oldbuf) \
PRESTO_ALLOC(newbuf, char *, PAGE_SIZE); \
if ( !newbuf ) { \
if (oldbuf) \
BUFF_FREE(oldbuf); \
return -ENOMEM; \
}
/*
* "buflen" should be PAGE_SIZE or more.
* Give relative path wrt to a fsetroot
*/
char * presto_path(struct dentry *dentry, struct dentry *root,
char *buffer, int buflen)
{
char * end = buffer+buflen;
char * retval;
*--end = '\0';
buflen--;
if (dentry->d_parent != dentry && list_empty(&dentry->d_hash)) {
buflen -= 10;
end -= 10;
memcpy(end, " (deleted)", 10);
}
/* Get '/' right */
retval = end-1;
*retval = '/';
for (;;) {
struct dentry * parent;
int namelen;
if (dentry == root)
break;
parent = dentry->d_parent;
if (dentry == parent)
break;
namelen = dentry->d_name.len;
buflen -= namelen + 1;
if (buflen < 0)
break;
end -= namelen;
memcpy(end, dentry->d_name.name, namelen);
*--end = '/';
retval = end;
dentry = parent;
}
return retval;
}
static inline char *logit(char *buf, const void *value, int size)
{
char *ptr = (char *)value;
memcpy(buf, ptr, size);
buf += size;
return buf;
}
static inline char *
journal_log_prefix_with_groups_and_ids(char *buf, int opcode,
struct rec_info *rec,
__u32 ngroups, gid_t *groups,
__u32 fsuid, __u32 fsgid)
{
struct big_journal_prefix p;
int i;
p.len = cpu_to_le32(rec->size);
p.version = PRESTO_KML_MAJOR_VERSION | PRESTO_KML_MINOR_VERSION;
p.pid = cpu_to_le32(current->pid);
p.uid = cpu_to_le32(current->uid);
p.fsuid = cpu_to_le32(fsuid);
p.fsgid = cpu_to_le32(fsgid);
p.ngroups = cpu_to_le32(ngroups);
p.opcode = cpu_to_le32(opcode);
for (i=0 ; i < ngroups ; i++)
p.groups[i] = cpu_to_le32((__u32) groups[i]);
buf = logit(buf, &p, sizeof(struct journal_prefix) +
sizeof(__u32) * ngroups);
return buf;
}
static inline char *
journal_log_prefix(char *buf, int opcode, struct rec_info *rec)
{
__u32 groups[NGROUPS_MAX];
int i;
/* convert 16 bit gid's to 32 bit gid's */
for (i=0; i<current->ngroups; i++)
groups[i] = (__u32) current->groups[i];
return journal_log_prefix_with_groups_and_ids(buf, opcode, rec,
(__u32)current->ngroups,
groups,
(__u32)current->fsuid,
(__u32)current->fsgid);
}
static inline char *
journal_log_prefix_with_groups(char *buf, int opcode, struct rec_info *rec,
__u32 ngroups, gid_t *groups)
{
return journal_log_prefix_with_groups_and_ids(buf, opcode, rec,
ngroups, groups,
(__u32)current->fsuid,
(__u32)current->fsgid);
}
static inline char *log_version(char *buf, struct dentry *dentry)
{
struct presto_version version;
presto_getversion(&version, dentry->d_inode);
return logit(buf, &version, sizeof(version));
}
static inline char *journal_log_suffix(char *buf, char *log,
struct presto_file_set *fset,
struct dentry *dentry,
struct rec_info *rec)
{
struct journal_suffix s;
struct journal_prefix *p = (struct journal_prefix *)log;
#if 0
/* XXX needs to be done after reservation,
disable ths until version 1.2 */
if ( dentry ) {
s.prevrec = cpu_to_le32(rec->offset - dentry->d_time);
dentry->d_time = (unsigned long) rec->offset;
} else {
s.prevrec = -1;
}
#endif
s.prevrec = 0;
/* record number needs to be filled in after reservation
s.recno = cpu_to_le32(rec->recno); */
s.time = cpu_to_le32(CURRENT_TIME);
s.len = cpu_to_le32(p->len);
return logit(buf, &s, sizeof(s));
}
int presto_close_journal_file(struct presto_file_set *fset)
{
int rc = 0;
int rc2 = 0;
int rc3 = 0;
ENTRY;
if ( fset->fset_kml.fd_file) {
rc =filp_close(fset->fset_kml.fd_file, 0);
fset->fset_kml.fd_file = NULL;
} else {
printk("hehehehe no filp\n");
}
if ( rc ) {
printk("presto: close files: kml filp won't close %d\n", rc);
}
if ( fset->fset_last_rcvd) {
rc2 = filp_close(fset->fset_last_rcvd, 0);
fset->fset_last_rcvd = NULL;
} else {
printk("hehehehe no filp\n");
}
if ( rc2 ) {
if ( !rc )
rc = rc2;
printk("presto: close files: last_rcvd filp won't close %d\n", rc2);
}
if ( fset->fset_lml.fd_file) {
rc3 = filp_close(fset->fset_lml.fd_file, 0);
fset->fset_lml.fd_file = NULL;
} else {
printk("hehehehe no filp\n");
}
if ( rc3 ) {
if ( (!rc) && (!rc2) )
rc = rc3;
printk("presto: close files: lml filp won't close %d\n", rc3);
}
return rc;
}
int presto_fwrite(struct file *file, const char *str, int len, loff_t *off)
{
int rc;
mm_segment_t old_fs;
ENTRY;
rc = -EINVAL;
if ( !off ) {
EXIT;
return rc;
}
if ( ! file ) {
EXIT;
return rc;
}
if ( ! file->f_op ) {
EXIT;
return rc;
}
if ( ! file->f_op->write ) {
EXIT;
return rc;
}
old_fs = get_fs();
set_fs(get_ds());
rc = file->f_op->write(file, str, len, off);
if (rc != len) {
printk("presto_fwrite: wrote %d bytes instead of "
"%d at %ld\n", rc, len, (long)*off);
rc = -EIO;
}
set_fs(old_fs);
EXIT;
return rc;
}
int presto_fread(struct file *file, char *str, int len, loff_t *off)
{
int rc;
mm_segment_t old_fs;
ENTRY;
if ( len > 512 ) {
printk("presto_fread: read at %Ld for %d bytes, ino %ld\n",
*off, len, file->f_dentry->d_inode->i_ino);
}
rc = -EINVAL;
if ( !off ) {
EXIT;
return rc;
}
if ( ! file ) {
EXIT;
return rc;
}
if ( ! file->f_op ) {
EXIT;
return rc;
}
if ( ! file->f_op->read ) {
EXIT;
return rc;
}
old_fs = get_fs();
set_fs(get_ds());
rc = file->f_op->read(file, str, len, off);
if (rc != len) {
printk("presto_fread: read %d bytes instead of "
"%d at %ld\n", rc, len, (long)*off);
rc = -EIO;
}
set_fs(old_fs);
return rc;
}
static int presto_kml_dispatch(struct presto_file_set *fset)
{
int rc = 0;
unsigned int kml_recno;
struct presto_log_fd *fd = &fset->fset_kml;
loff_t offset;
ENTRY;
write_lock(&fd->fd_lock);
/* Determine the largest valid offset, i.e. up until the first
* reservation held on the file. */
if ( !list_empty(&fd->fd_reservations) ) {
struct presto_reservation_data *rd;
rd = list_entry(fd->fd_reservations.next,
struct presto_reservation_data,
ri_list);
offset = rd->ri_offset;
kml_recno = rd->ri_recno;
} else {
offset = fd->fd_file->f_dentry->d_inode->i_size;
kml_recno = fset->fset_kml.fd_recno;
}
if ( kml_recno < fset->fset_lento_recno ) {
printk("presto_kml_dispatch: smoke is coming\n");
write_unlock(&fd->fd_lock);
return 0;
} else if ( kml_recno == fset->fset_lento_recno ) {
write_unlock(&fd->fd_lock);
EXIT;
return 0;
}
CDEBUG(D_PIOCTL, "fset: %s\n", fset->fset_name);
rc = lento_kml(fset->fset_cache->cache_psdev->uc_minor,
fset->fset_lento_off, fset->fset_lento_recno,
offset, kml_recno, strlen(fset->fset_name),
fset->fset_name);
if ( rc ) {
write_unlock(&fd->fd_lock);
EXIT;
return rc;
}
fset->fset_lento_off = offset;
fset->fset_lento_recno = kml_recno;
write_unlock(&fd->fd_lock);
EXIT;
return 0;
}
/* structure of an extended log record:
buf-prefix buf-body [string1 [string2 [string3]]] buf-suffix
note: moves offset forward
*/
static inline int presto_write_record(struct file *f, loff_t *off,
const char *buf, size_t size,
const char *string1, int len1,
const char *string2, int len2,
const char *string3, int len3)
{
size_t prefix_size;
int rc;
prefix_size = size - sizeof(struct journal_suffix);
rc = presto_fwrite(f, buf, prefix_size, off);
if ( rc != prefix_size ) {
printk("Write error!\n");
EXIT;
return -EIO;
}
if ( string1 && len1 ) {
rc = presto_fwrite(f, string1, len1, off);
if ( rc != len1 ) {
printk("Write error!\n");
EXIT;
return -EIO;
}
}
if ( string2 && len2 ) {
rc = presto_fwrite(f, string2, len2, off);
if ( rc != len2 ) {
printk("Write error!\n");
EXIT;
return -EIO;
}
}
if ( string3 && len3 ) {
rc = presto_fwrite(f, string3, len3, off);
if ( rc != len3 ) {
printk("Write error!\n");
EXIT;
return -EIO;
}
}
rc = presto_fwrite(f, buf + prefix_size,
sizeof(struct journal_suffix), off);
if ( rc != sizeof(struct journal_suffix) ) {
printk("Write error!\n");
EXIT;
return -EIO;
}
return 0;
}
/*
* rec->size must be valid prior to calling this function.
*/
static int presto_log(struct presto_file_set *fset, struct rec_info *rec,
const char *buf, size_t size,
const char *string1, int len1,
const char *string2, int len2,
const char *string3, int len3)
{
int rc;
struct presto_reservation_data rd;
loff_t offset;
struct presto_log_fd *fd;
struct journal_suffix *s;
int prefix_size;
ENTRY;
/* buf is NULL when no_journal is in effect */
if (!buf) {
EXIT;
return -EINVAL;
}
if (rec->is_kml) {
fd = &fset->fset_kml;
} else {
fd = &fset->fset_lml;
}
presto_reserve_record(fset, fd, rec, &rd);
offset = rec->offset;
/* now we know the record number */
prefix_size = size - sizeof(struct journal_suffix);
s = (struct journal_suffix *) (buf + prefix_size);
s->recno = cpu_to_le32(rec->recno);
rc = presto_write_record(fd->fd_file, &offset, buf, size,
string1, len1, string2, len2, string3, len3);
if (rc) {
printk("presto: error writing record to %s\n",
rec->is_kml ? "KML" : "LML");
return rc;
}
presto_release_record(fd, &rd);
rc = presto_kml_dispatch(fset);
EXIT;
return rc;
}
/* read from the record at tail */
static int presto_last_record(struct presto_log_fd *fd, loff_t *size,
loff_t *tail_offset, __u32 *recno, loff_t tail)
{
struct journal_suffix suffix;
int rc;
loff_t zeroes;
*recno = 0;
*tail_offset = 0;
*size = 0;
if (tail < sizeof(struct journal_prefix) + sizeof(suffix)) {
EXIT;
return 0;
}
zeroes = tail - sizeof(int);
while ( zeroes >= 0 ) {
int data;
rc = presto_fread(fd->fd_file, (char *)&data, sizeof(data),
&zeroes);
if ( rc != sizeof(data) ) {
rc = -EIO;
return rc;
}
if (data)
break;
zeroes -= 2 * sizeof(data);
}
/* zeroes at the begining of file. this is needed to prevent
presto_fread errors -SHP
*/
if (zeroes <= 0) return 0;
zeroes -= sizeof(suffix);
rc = presto_fread(fd->fd_file, (char *)&suffix, sizeof(suffix), &zeroes);
if ( rc != sizeof(suffix) ) {
EXIT;
return rc;
}
if ( suffix.len > 500 ) {
printk("PRESTO: Warning long record tail at %ld, rec tail_offset at %ld (size %d)\n",
(long) zeroes, (long)*tail_offset, suffix.len);
}
*recno = suffix.recno;
*size = suffix.len;
*tail_offset = zeroes;
return 0;
}
static int presto_kml_last_recno(struct presto_file_set *fset)
{
int rc;
loff_t size;
loff_t tail_offset;
int recno;
loff_t tail = fset->fset_kml.fd_file->f_dentry->d_inode->i_size;
if ((rc = presto_last_record(&fset->fset_kml, &size,
&tail_offset, &recno, tail)) ) {
EXIT;
return rc;
}
fset->fset_kml.fd_offset = tail_offset;
fset->fset_kml.fd_recno = recno;
CDEBUG(D_JOURNAL, "setting fset_kml->fd_recno to %d, offset %Ld\n",
recno, tail_offset);
EXIT;
return 0;
}
static struct file *presto_log_open(struct presto_file_set *fset, char *name, int flags)
{
struct presto_cache *cache = fset->fset_cache;
struct file *f;
int error;
int mtpt_len, path_len;
char *path;
ENTRY;
mtpt_len = strlen(cache->cache_mtpt);
path_len = mtpt_len + strlen("/.intermezzo/") +
strlen(fset->fset_name) + strlen(name);
error = -ENOMEM;
PRESTO_ALLOC(path, char *, path_len + 1);
if ( !path ) {
EXIT;
return ERR_PTR(-ENOMEM);
}
sprintf(path, "%s/.intermezzo/%s/%s", cache->cache_mtpt,
fset->fset_name, name);
CDEBUG(D_INODE, "opening file %s\n", path);
f = filp_open(path, flags, 0);
error = PTR_ERR(f);
if (IS_ERR(f)) {
CDEBUG(D_INODE, "Error %d\n", error);
EXIT;
goto out_free;
}
error = -EINVAL;
if ( cache != presto_get_cache(f->f_dentry->d_inode) ) {
printk("PRESTO: %s cache does not match fset cache!\n", name);
fset->fset_kml.fd_file = NULL;
filp_close(f, NULL);
goto out_free;
}
if (cache->cache_filter && cache->cache_filter->o_trops &&
cache->cache_filter->o_trops->tr_journal_data) {
CDEBUG(D_INODE, "\n");
cache->cache_filter->o_trops->tr_journal_data
(f->f_dentry->d_inode);
} else {
printk("WARNING: InterMezzo no file data logging!\n");
}
out_free:
PRESTO_FREE(path, path_len + 1);
EXIT;
return f;
}
int presto_init_kml_file(struct presto_file_set *fset)
{
int error = 0;
struct file *f;
ENTRY;
if (fset->fset_kml.fd_file) {
CDEBUG(D_INODE, "fset already has KML open\n");
EXIT;
return 0;
}
fset->fset_kml.fd_lock = RW_LOCK_UNLOCKED;
INIT_LIST_HEAD(&fset->fset_kml.fd_reservations);
f = presto_log_open(fset, "kml", O_RDWR | O_CREAT);
if ( IS_ERR(f) ) {
error = PTR_ERR(f);
return error;
}
fset->fset_kml.fd_file = f;
error = presto_kml_last_recno(fset);
if ( error ) {
EXIT;
fset->fset_kml.fd_file = NULL;
filp_close(f, NULL);
printk("presto: IO error in KML of fset %s\n",
fset->fset_name);
}
fset->fset_lento_off = fset->fset_kml.fd_offset;
fset->fset_lento_recno = fset->fset_kml.fd_recno;
EXIT;
return error;
}
int presto_init_last_rcvd_file(struct presto_file_set *fset)
{
int error = 0;
struct file *f;
ENTRY;
if (fset->fset_last_rcvd) {
CDEBUG(D_INODE, "fset already has last_rcvd open\n");
EXIT;
return 0;
}
f = presto_log_open(fset, "last_rcvd", O_RDWR | O_CREAT);
if ( IS_ERR(f) ) {
error = PTR_ERR(f);
return error;
}
fset->fset_last_rcvd = f;
EXIT;
return error;
}
int presto_init_lml_file(struct presto_file_set *fset)
{
int error = 0;
struct file *f;
ENTRY;
if (fset->fset_lml.fd_file) {
CDEBUG(D_INODE, "fset already has lml open\n");
EXIT;
return 0;
}
fset->fset_lml.fd_lock = RW_LOCK_UNLOCKED;
INIT_LIST_HEAD(&fset->fset_lml.fd_reservations);
f = presto_log_open(fset, "lml", O_RDWR | O_CREAT);
if ( IS_ERR(f) ) {
error = PTR_ERR(f);
return error;
}
fset->fset_lml.fd_file = f;
fset->fset_lml.fd_offset =
fset->fset_lml.fd_file->f_dentry->d_inode->i_size;
EXIT;
return error;
}
/* Write the last_rcvd values to the last)_rcvd file */
int presto_write_last_rcvd(struct rec_info *recinfo,
struct presto_file_set *fset,
struct lento_vfs_context *info)
{
int ret;
loff_t off = info->slot_offset;
struct {
__u32 remote_recno;
__u64 remote_offset;
__u32 local_recno;
__u64 local_offset;
} rcvd_rec;
rcvd_rec.remote_recno = cpu_to_le32(info->recno);
rcvd_rec.remote_offset = cpu_to_le64(info->kml_offset);
rcvd_rec.local_recno = cpu_to_le32(recinfo->recno);
rcvd_rec.local_offset = cpu_to_le64(recinfo->offset + recinfo->size);
ret = presto_fwrite(fset->fset_last_rcvd, (char *)(&rcvd_rec),
sizeof(rcvd_rec), &off);
if (ret == sizeof(rcvd_rec))
ret = 0;
return ret;
}
/* LML records here */
/* this writes the LML records for close, in conjunction with the KML */
int presto_write_lml_close(struct rec_info *rec,
struct presto_file_set *fset,
struct file *file,
__u64 remote_ino,
__u32 remote_generation,
__u32 remote_version,
struct presto_version *new_file_ver)
{
int opcode = PRESTO_OP_CLOSE;
char *buffer;
struct dentry *dentry = file->f_dentry;
__u64 ino;
__u32 pathlen;
char *path;
__u32 generation;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
CDEBUG(D_INODE, "Path: %s\n", path);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
ino = cpu_to_le64(dentry->d_inode->i_ino);
generation = cpu_to_le32(dentry->d_inode->i_generation);
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + sizeof(*new_file_ver) +
sizeof(ino) + sizeof(generation) + sizeof(pathlen) +
sizeof(remote_ino) + sizeof(remote_generation) +
sizeof(remote_version) + sizeof(rec->offset) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 0;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, new_file_ver, sizeof(*new_file_ver));
logrecord = logit(logrecord, &ino, sizeof(ino));
logrecord = logit(logrecord, &generation, sizeof(generation));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, &remote_ino, sizeof(remote_ino));
logrecord = logit(logrecord, &remote_generation,
sizeof(remote_generation));
logrecord = logit(logrecord, &remote_version, sizeof(remote_version));
logrecord = logit(logrecord, &rec->offset, sizeof(rec->offset));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int presto_journal_write(struct rec_info *rec,
struct presto_file_set *fset,
struct file *file)
{
struct presto_version file_version;
int rc;
ENTRY;
presto_getversion(&file_version, file->f_dentry->d_inode);
/* append this record */
rc = presto_write_lml_close
(rec,
fset,
file,
0, /* remote_ino */
0, /* remote_generation */
0, /* remote_version */
&file_version);
EXIT;
return rc;
}
/*
* Check if the given record is at the end of the file. If it is, truncate
* the lml to the record's offset, removing it. Repeat on prior record,
* until we reach an active record or a reserved record (as defined by the
* reservations list).
*/
static int presto_truncate_lml_tail(struct presto_file_set *fset)
{
loff_t lml_tail;
loff_t lml_last_rec;
loff_t lml_last_recsize;
loff_t local_offset;
int recno;
struct journal_prefix prefix;
struct inode *inode = fset->fset_lml.fd_file->f_dentry->d_inode;
void *handle;
int rc;
ENTRY;
/* If someone else is already truncating the LML, return. */
write_lock(&fset->fset_lml.fd_lock);
if (fset->fset_lml.fd_truncating == 1 ) {
write_unlock(&fset->fset_lml.fd_lock);
EXIT;
return 0;
}
/* someone is about to write to the end of the LML */
if ( !list_empty(&fset->fset_lml.fd_reservations) ) {
write_unlock(&fset->fset_lml.fd_lock);
EXIT;
return 0;
}
lml_tail = fset->fset_lml.fd_file->f_dentry->d_inode->i_size;
/* Nothing to truncate?*/
if (lml_tail == 0) {
write_unlock(&fset->fset_lml.fd_lock);
EXIT;
return 0;
}
fset->fset_lml.fd_truncating = 1;
write_unlock(&fset->fset_lml.fd_lock);
presto_last_record(&fset->fset_lml, &lml_last_recsize,
&lml_last_rec, &recno, lml_tail);
/* Do we have a record to check? If not we have zeroes at the
beginning of the file. -SHP
*/
if (lml_last_recsize != 0) {
local_offset = lml_last_rec - lml_last_recsize;
rc = presto_fread(fset->fset_lml.fd_file, (char *)&prefix,
sizeof(prefix), &local_offset);
if (rc != sizeof(prefix)) {
EXIT;
goto tr_out;
}
if ( prefix.opcode != PRESTO_OP_NOOP ) {
EXIT;
rc = 0;
/* We may have zeroes at the end of the file, should
we clear them out? -SHP
*/
goto tr_out;
}
} else
lml_last_rec=0;
handle = presto_trans_start(fset, inode, PRESTO_OP_TRUNC);
if ( !handle ) {
EXIT;
rc = -ENOMEM;
goto tr_out;
}
rc = presto_do_truncate(fset, fset->fset_lml.fd_file->f_dentry,
lml_last_rec - lml_last_recsize, lml_tail);
presto_trans_commit(fset, handle);
if ( rc == 0 ) {
rc = 1;
}
EXIT;
tr_out:
CDEBUG(D_JOURNAL, "rc = %d\n", rc);
write_lock(&fset->fset_lml.fd_lock);
fset->fset_lml.fd_truncating = 0;
write_unlock(&fset->fset_lml.fd_lock);
return rc;
}
int presto_truncate_lml(struct presto_file_set *fset)
{
int rc;
ENTRY;
while ( (rc = presto_truncate_lml_tail(fset)) > 0);
if ( rc < 0 && rc != -EALREADY) {
printk("truncate_lml error %d\n", rc);
}
EXIT;
return rc;
}
int presto_clear_lml_close(struct presto_file_set *fset,
loff_t lml_offset)
{
int rc;
struct journal_prefix record;
loff_t offset = lml_offset;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
CDEBUG(D_JOURNAL, "reading prefix: off %ld, size %Zd\n",
(long)lml_offset, sizeof(record));
rc = presto_fread(fset->fset_lml.fd_file, (char *)&record,
sizeof(record), &offset);
if ( rc != sizeof(record) ) {
printk("presto: clear_lml io error %d\n", rc);
EXIT;
return -EIO;
}
/* overwrite the prefix */
CDEBUG(D_JOURNAL, "overwriting prefix: off %ld\n", (long)lml_offset);
record.opcode = PRESTO_OP_NOOP;
offset = lml_offset;
/* note: this does just a single transaction in the cache */
rc = presto_fwrite(fset->fset_lml.fd_file, (char *)(&record),
sizeof(record), &offset);
if ( rc != sizeof(record) ) {
EXIT;
return -EIO;
}
EXIT;
return 0;
}
/* now a journal function for every operation */
int presto_journal_setattr(struct rec_info *rec,
struct presto_file_set *fset,
struct dentry *dentry,
struct presto_version *old_ver, struct iattr *iattr)
{
int opcode = PRESTO_OP_SETATTR;
char *buffer;
char *path;
__u32 pathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
__u32 uid, gid, mode, valid, flags;
__u64 fsize, mtime, ctime;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
if (!dentry->d_inode || (dentry->d_inode->i_nlink == 0) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + sizeof(*old_ver) +
sizeof(valid) + sizeof(mode) + sizeof(uid) + sizeof(gid) +
sizeof(fsize) + sizeof(mtime) + sizeof(ctime) + sizeof(flags) +
sizeof(pathlen) + sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
/* Only journal one kind of mtime, and not atime at all. Also don't
* journal bogus data in iattr, to make the journal more compressible.
*/
if (iattr->ia_valid & ATTR_MTIME_SET)
iattr->ia_valid = iattr->ia_valid | ATTR_MTIME;
valid = cpu_to_le32(iattr->ia_valid & ~(ATTR_ATIME | ATTR_MTIME_SET |
ATTR_ATIME_SET));
mode = iattr->ia_valid & ATTR_MODE ? cpu_to_le32(iattr->ia_mode): 0;
uid = iattr->ia_valid & ATTR_UID ? cpu_to_le32(iattr->ia_uid): 0;
gid = iattr->ia_valid & ATTR_GID ? cpu_to_le32(iattr->ia_gid): 0;
fsize = iattr->ia_valid & ATTR_SIZE ? cpu_to_le64(iattr->ia_size): 0;
mtime = iattr->ia_valid & ATTR_MTIME ? cpu_to_le64(iattr->ia_mtime): 0;
ctime = iattr->ia_valid & ATTR_CTIME ? cpu_to_le64(iattr->ia_ctime): 0;
flags = iattr->ia_valid & ATTR_ATTR_FLAG ?
cpu_to_le32(iattr->ia_attr_flags): 0;
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, old_ver, sizeof(*old_ver));
logrecord = logit(logrecord, &valid, sizeof(valid));
logrecord = logit(logrecord, &mode, sizeof(mode));
logrecord = logit(logrecord, &uid, sizeof(uid));
logrecord = logit(logrecord, &gid, sizeof(gid));
logrecord = logit(logrecord, &fsize, sizeof(fsize));
logrecord = logit(logrecord, &mtime, sizeof(mtime));
logrecord = logit(logrecord, &ctime, sizeof(ctime));
logrecord = logit(logrecord, &flags, sizeof(flags));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int presto_journal_create(struct rec_info *rec, struct presto_file_set *fset,
struct dentry *dentry,
struct presto_version *tgt_dir_ver,
struct presto_version *new_file_ver, int mode)
{
int opcode = PRESTO_OP_CREATE;
char *buffer;
char *path;
__u32 pathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
__u32 uid, gid, lmode;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
uid = cpu_to_le32(dentry->d_inode->i_uid);
gid = cpu_to_le32(dentry->d_inode->i_gid);
lmode = cpu_to_le32(mode);
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(lmode) + sizeof(uid) + sizeof(gid) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, dentry->d_parent);
logrecord = logit(logrecord, new_file_ver, sizeof(*new_file_ver));
logrecord = logit(logrecord, &lmode, sizeof(lmode));
logrecord = logit(logrecord, &uid, sizeof(uid));
logrecord = logit(logrecord, &gid, sizeof(gid));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int presto_journal_symlink(struct rec_info *rec, struct presto_file_set *fset, struct dentry *dentry,
const char *target,
struct presto_version *tgt_dir_ver,
struct presto_version *new_link_ver)
{
int opcode = PRESTO_OP_SYMLINK;
char *buffer;
char *path;
__u32 pathlen;
int size;
char *logrecord;
char record[292];
__u32 targetlen = cpu_to_le32(strlen(target));
struct dentry *root;
__u32 uid, gid;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
uid = cpu_to_le32(dentry->d_inode->i_uid);
gid = cpu_to_le32(dentry->d_inode->i_gid);
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(uid) + sizeof(gid) + sizeof(pathlen) +
sizeof(targetlen) + sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen)) +
size_round(le32_to_cpu(targetlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, dentry->d_parent);
logrecord = logit(logrecord, new_link_ver, sizeof(*new_link_ver));
logrecord = logit(logrecord, &uid, sizeof(uid));
logrecord = logit(logrecord, &gid, sizeof(gid));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, &targetlen, sizeof(targetlen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
target, size_round(le32_to_cpu(targetlen)),
NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int presto_journal_mkdir(struct rec_info *rec, struct presto_file_set *fset, struct dentry *dentry,
struct presto_version *tgt_dir_ver,
struct presto_version *new_dir_ver, int mode)
{
int opcode = PRESTO_OP_MKDIR;
char *buffer;
char *path;
__u32 pathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
__u32 uid, gid, lmode;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
uid = cpu_to_le32(dentry->d_inode->i_uid);
gid = cpu_to_le32(dentry->d_inode->i_gid);
lmode = cpu_to_le32(mode);
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(lmode) + sizeof(uid) + sizeof(gid) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, dentry->d_parent);
logrecord = logit(logrecord, new_dir_ver, sizeof(*new_dir_ver));
logrecord = logit(logrecord, &lmode, sizeof(lmode));
logrecord = logit(logrecord, &uid, sizeof(uid));
logrecord = logit(logrecord, &gid, sizeof(gid));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int
presto_journal_rmdir(struct rec_info *rec, struct presto_file_set *fset,
struct dentry *dir, struct presto_version *tgt_dir_ver,
struct presto_version *old_dir_ver, int len,
const char *name)
{
int opcode = PRESTO_OP_RMDIR;
char *buffer;
char *path;
__u32 pathlen, llen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
llen = cpu_to_le32(len);
BUFF_ALLOC(buffer, NULL);
path = presto_path(dir, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(pathlen) + sizeof(llen) + sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
CDEBUG(D_JOURNAL, "path: %s (%d), name: %s (%d), size %d\n",
path, pathlen, name, len, size);
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen)) +
size_round(len);
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, dir);
logrecord = logit(logrecord, old_dir_ver, sizeof(*old_dir_ver));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, &llen, sizeof(llen));
logrecord = journal_log_suffix(logrecord, record, fset, dir, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
name, size_round(len),
NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int
presto_journal_mknod(struct rec_info *rec, struct presto_file_set *fset,
struct dentry *dentry, struct presto_version *tgt_dir_ver,
struct presto_version *new_node_ver, int mode,
int dmajor, int dminor )
{
int opcode = PRESTO_OP_MKNOD;
char *buffer;
char *path;
__u32 pathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
__u32 uid, gid, lmode, lmajor, lminor;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
uid = cpu_to_le32(dentry->d_inode->i_uid);
gid = cpu_to_le32(dentry->d_inode->i_gid);
lmode = cpu_to_le32(mode);
lmajor = cpu_to_le32(dmajor);
lminor = cpu_to_le32(dminor);
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(lmode) + sizeof(uid) + sizeof(gid) + sizeof(lmajor) +
sizeof(lminor) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, dentry->d_parent);
logrecord = logit(logrecord, new_node_ver, sizeof(*new_node_ver));
logrecord = logit(logrecord, &lmode, sizeof(lmode));
logrecord = logit(logrecord, &uid, sizeof(uid));
logrecord = logit(logrecord, &gid, sizeof(gid));
logrecord = logit(logrecord, &lmajor, sizeof(lmajor));
logrecord = logit(logrecord, &lminor, sizeof(lminor));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int
presto_journal_link(struct rec_info *rec, struct presto_file_set *fset,
struct dentry *src, struct dentry *tgt,
struct presto_version *tgt_dir_ver,
struct presto_version *new_link_ver)
{
int opcode = PRESTO_OP_LINK;
char *buffer, *srcbuffer;
char *path, *srcpath;
__u32 pathlen, srcpathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
BUFF_ALLOC(srcbuffer, NULL);
srcpath = presto_path(src, root, srcbuffer, PAGE_SIZE);
srcpathlen = cpu_to_le32(MYPATHLEN(srcbuffer, srcpath));
BUFF_ALLOC(buffer, srcbuffer);
path = presto_path(tgt, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(srcpathlen) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen)) +
size_round(le32_to_cpu(srcpathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, tgt->d_parent);
logrecord = logit(logrecord, new_link_ver, sizeof(*new_link_ver));
logrecord = logit(logrecord, &srcpathlen, sizeof(srcpathlen));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, tgt, rec);
error = presto_log(fset, rec, record, size,
srcpath, size_round(le32_to_cpu(srcpathlen)),
path, size_round(le32_to_cpu(pathlen)),
NULL, 0);
BUFF_FREE(srcbuffer);
BUFF_FREE(buffer);
EXIT;
return error;
}
int presto_journal_rename(struct rec_info *rec, struct presto_file_set *fset, struct dentry *src,
struct dentry *tgt,
struct presto_version *src_dir_ver,
struct presto_version *tgt_dir_ver)
{
int opcode = PRESTO_OP_RENAME;
char *buffer, *srcbuffer;
char *path, *srcpath;
__u32 pathlen, srcpathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
BUFF_ALLOC(srcbuffer, NULL);
srcpath = presto_path(src, root, srcbuffer, PAGE_SIZE);
srcpathlen = cpu_to_le32(MYPATHLEN(srcbuffer, srcpath));
BUFF_ALLOC(buffer, srcbuffer);
path = presto_path(tgt, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 4 * sizeof(*src_dir_ver) +
sizeof(srcpathlen) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen)) +
size_round(le32_to_cpu(srcpathlen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, src_dir_ver, sizeof(*src_dir_ver));
logrecord = log_version(logrecord, src->d_parent);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, tgt->d_parent);
logrecord = logit(logrecord, &srcpathlen, sizeof(srcpathlen));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, tgt, rec);
error = presto_log(fset, rec, record, size,
srcpath, size_round(le32_to_cpu(srcpathlen)),
path, size_round(le32_to_cpu(pathlen)),
NULL, 0);
BUFF_FREE(buffer);
BUFF_FREE(srcbuffer);
EXIT;
return error;
}
int presto_journal_unlink(struct rec_info *rec, struct presto_file_set *fset, struct dentry *dir,
struct presto_version *tgt_dir_ver,
struct presto_version *old_file_ver, int len,
const char *name)
{
int opcode = PRESTO_OP_UNLINK;
char *buffer;
char *path;
__u32 pathlen, llen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
llen = cpu_to_le32(len);
BUFF_ALLOC(buffer, NULL);
path = presto_path(dir, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) + 3 * sizeof(*tgt_dir_ver) +
sizeof(pathlen) + sizeof(llen) + sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen)) + size_round(len);
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, tgt_dir_ver, sizeof(*tgt_dir_ver));
logrecord = log_version(logrecord, dir);
logrecord = logit(logrecord, old_file_ver, sizeof(*old_file_ver));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, &llen, sizeof(llen));
logrecord = journal_log_suffix(logrecord, record, fset, dir, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
name, size_round(len),
NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int
presto_journal_close(struct rec_info *rec, struct presto_file_set *fset,
struct file *file, struct dentry *dentry,
struct presto_version *new_file_ver)
{
int opcode = PRESTO_OP_CLOSE;
struct presto_file_data *fd;
char *buffer;
char *path;
__u64 ino;
__u32 pathlen;
__u32 generation;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
__u32 open_fsuid;
__u32 open_fsgid;
__u32 open_ngroups;
__u32 open_groups[NGROUPS_MAX];
__u32 open_mode;
__u32 open_uid;
__u32 open_gid;
int i;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
if (!dentry->d_inode || (dentry->d_inode->i_nlink == 0) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
fd = (struct presto_file_data *)file->private_data;
if (fd) {
open_ngroups = fd->fd_ngroups;
for (i = 0; i < fd->fd_ngroups; i++)
open_groups[i] = (__u32) fd->fd_groups[i];
open_mode = fd->fd_mode;
open_uid = fd->fd_uid;
open_gid = fd->fd_gid;
open_fsuid = fd->fd_fsuid;
open_fsgid = fd->fd_fsgid;
} else {
open_ngroups = current->ngroups;
for (i=0; i<current->ngroups; i++)
open_groups[i] = (__u32) current->groups[i];
open_mode = dentry->d_inode->i_mode;
open_uid = dentry->d_inode->i_uid;
open_gid = dentry->d_inode->i_gid;
open_fsuid = current->fsuid;
open_fsgid = current->fsgid;
}
BUFF_ALLOC(buffer, NULL);
path = presto_path(dentry, root, buffer, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(buffer, path));
ino = cpu_to_le64(dentry->d_inode->i_ino);
generation = cpu_to_le32(dentry->d_inode->i_generation);
size = sizeof(__u32) * open_ngroups +
sizeof(open_mode) + sizeof(open_uid) + sizeof(open_gid) +
sizeof(struct journal_prefix) + sizeof(*new_file_ver) +
sizeof(ino) + sizeof(generation) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix_with_groups_and_ids(
record, opcode, rec, open_ngroups, open_groups,
open_fsuid, open_fsgid);
logrecord = logit(logrecord, &open_mode, sizeof(open_mode));
logrecord = logit(logrecord, &open_uid, sizeof(open_uid));
logrecord = logit(logrecord, &open_gid, sizeof(open_gid));
logrecord = logit(logrecord, new_file_ver, sizeof(*new_file_ver));
logrecord = logit(logrecord, &ino, sizeof(ino));
logrecord = logit(logrecord, &generation, sizeof(generation));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
BUFF_FREE(buffer);
EXIT;
return error;
}
int presto_rewrite_close(struct rec_info *rec, struct presto_file_set *fset,
char *path, __u32 pathlen,
int ngroups, __u32 *groups,
__u64 ino, __u32 generation,
struct presto_version *new_file_ver)
{
int opcode = PRESTO_OP_CLOSE;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
size = sizeof(__u32) * ngroups +
sizeof(struct journal_prefix) + sizeof(*new_file_ver) +
sizeof(ino) + sizeof(generation) +
sizeof(le32_to_cpu(pathlen)) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen));
logrecord = journal_log_prefix_with_groups(record, opcode, rec,
ngroups, groups);
logrecord = logit(logrecord, new_file_ver, sizeof(*new_file_ver));
logrecord = logit(logrecord, &ino, sizeof(ino));
logrecord = logit(logrecord, &generation, sizeof(generation));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = journal_log_suffix(logrecord, record, fset, NULL, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
NULL, 0, NULL, 0);
EXIT;
return error;
}
/* write closes for the local close records in the LML */
int presto_complete_lml(struct presto_file_set *fset)
{
__u32 groups[NGROUPS_MAX];
loff_t lml_offset;
loff_t read_offset;
char *buffer;
void *handle;
struct rec_info rec;
struct close_rec {
struct presto_version new_file_ver;
__u64 ino;
__u32 generation;
__u32 pathlen;
__u64 remote_ino;
__u32 remote_generation;
__u32 remote_version;
__u64 lml_offset;
} close_rec;
struct file *file = fset->fset_lml.fd_file;
struct journal_prefix prefix;
int rc = 0;
ENTRY;
lml_offset = 0;
again:
if (lml_offset >= file->f_dentry->d_inode->i_size) {
EXIT;
return rc;
}
read_offset = lml_offset;
rc = presto_fread(file, (char *)&prefix,
sizeof(prefix), &read_offset);
if ( rc != sizeof(prefix) ) {
EXIT;
printk("presto_complete_lml: ioerror - 1, tell Peter\n");
return -EIO;
}
if ( prefix.opcode == PRESTO_OP_NOOP ) {
lml_offset += prefix.len;
goto again;
}
rc = presto_fread(file, (char *)groups,
prefix.ngroups * sizeof(__u32), &read_offset);
if ( rc != prefix.ngroups * sizeof(__u32) ) {
EXIT;
printk("presto_complete_lml: ioerror - 2, tell Peter\n");
return -EIO;
}
rc = presto_fread(file, (char *)&close_rec,
sizeof(close_rec), &read_offset);
if ( rc != sizeof(close_rec) ) {
EXIT;
printk("presto_complete_lml: ioerror - 3, tell Peter\n");
return -EIO;
}
/* is this a backfetch or a close record? */
if ( le64_to_cpu(close_rec.remote_ino) != 0 ) {
lml_offset += prefix.len;
goto again;
}
BUFF_ALLOC(buffer, NULL);
rc = presto_fread(file, (char *)buffer,
le32_to_cpu(close_rec.pathlen), &read_offset);
if ( rc != le32_to_cpu(close_rec.pathlen) ) {
EXIT;
printk("presto_complete_lml: ioerror - 4, tell Peter\n");
return -EIO;
}
handle = presto_trans_start(fset, file->f_dentry->d_inode,
PRESTO_OP_RELEASE);
if ( !handle ) {
EXIT;
return -ENOMEM;
}
rc = presto_clear_lml_close(fset, lml_offset);
if ( rc ) {
printk("error during clearing: %d\n", rc);
presto_trans_commit(fset, handle);
EXIT;
return rc;
}
rc = presto_rewrite_close(&rec, fset, buffer, close_rec.pathlen,
prefix.ngroups, groups,
close_rec.ino, close_rec.generation,
&close_rec.new_file_ver);
if ( rc ) {
printk("error during rewrite close: %d\n", rc);
presto_trans_commit(fset, handle);
EXIT;
return rc;
}
presto_trans_commit(fset, handle);
if ( rc ) {
printk("error during truncation: %d\n", rc);
EXIT;
return rc;
}
lml_offset += prefix.len;
CDEBUG(D_JOURNAL, "next LML record at: %ld\n", (long)lml_offset);
goto again;
EXIT;
return -EINVAL;
}
#ifdef CONFIG_FS_EXT_ATTR
/* Journal an ea operation. A NULL buffer implies the attribute is
* getting deleted. In this case we simply change the opcode, but nothing
* else is affected.
*/
int presto_journal_set_ext_attr (struct rec_info *rec,
struct presto_file_set *fset,
struct dentry *dentry,
struct presto_version *ver, const char *name,
const char *buffer, int buffer_len,
int flags)
{
int opcode = (buffer == NULL) ?
PRESTO_OP_DELEXTATTR :
PRESTO_OP_SETEXTATTR ;
char *temp;
char *path;
__u32 pathlen;
int size;
char *logrecord;
char record[292];
struct dentry *root;
int error;
__u32 namelen=cpu_to_le32(strnlen(name,PRESTO_EXT_ATTR_NAME_MAX));
__u32 buflen=(buffer != NULL)? cpu_to_le32(buffer_len): cpu_to_le32(0);
__u32 mode;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
if (!dentry->d_inode || (dentry->d_inode->i_nlink == 0) ) {
EXIT;
return 0;
}
root = fset->fset_mtpt;
BUFF_ALLOC(temp, NULL);
path = presto_path(dentry, root, temp, PAGE_SIZE);
pathlen = cpu_to_le32(MYPATHLEN(temp, path));
flags=cpu_to_le32(flags);
/* Ugly, but needed. posix ACLs change the mode without using
* setattr, we need to record these changes. The EA code per se
* is not really affected.
*/
mode=cpu_to_le32(dentry->d_inode->i_mode);
size = sizeof(__u32) * current->ngroups +
sizeof(struct journal_prefix) +
2 * sizeof(struct presto_version) +
sizeof(flags) + sizeof(mode) + sizeof(namelen) +
sizeof(buflen) + sizeof(pathlen) +
sizeof(struct journal_suffix);
if ( size > sizeof(record) ) {
printk("PRESTO: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
}
rec->is_kml = 1;
/* Make space for a path, a attr name and value*/
/* We use the buflen instead of buffer_len to make sure that we
* journal the right length. This may be a little paranoid, but
* with 64 bits round the corner, I would rather be safe than sorry!
* Also this handles deletes with non-zero buffer_lengths correctly.
* SHP
*/
rec->size = size + size_round(le32_to_cpu(pathlen)) +
size_round(le32_to_cpu(namelen)) +
size_round(le32_to_cpu(buflen));
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = logit(logrecord, ver, sizeof(*ver));
logrecord = log_version(logrecord, dentry);
logrecord = logit(logrecord, &flags, sizeof(flags));
logrecord = logit(logrecord, &mode, sizeof(flags));
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, &namelen, sizeof(namelen));
logrecord = logit(logrecord, &buflen, sizeof(buflen));
logrecord = journal_log_suffix(logrecord, record, fset, dentry, rec);
error = presto_log(fset, rec, record, size,
path, size_round(le32_to_cpu(pathlen)),
name, size_round(le32_to_cpu(namelen)),
buffer, size_round(le32_to_cpu(buflen)));
BUFF_FREE(temp);
EXIT;
return error;
}
#endif
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