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kernel / pub / scm / linux / kernel / git / wtarreau / linux-2.4 / refs/heads/master / . / fs / intermezzo / journal.c
blob: 2f68e5acecf907d58db688f976f49a09d7ee5266 [file] [log] [blame]
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* Copyright (C) 1998 Peter J. Braam
* Copyright (C) 2001 Cluster File Systems, Inc.
* Copyright (C) 2001 Tacit Networks, Inc. <phil@off.net>
*
* Support for journalling extended attributes
* Copyright (C) 2001 Shirish H. Phatak, Tacit Networks, Inc.
*
* This file is part of InterMezzo, http://www.inter-mezzo.org.
*
* InterMezzo is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* InterMezzo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with InterMezzo; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.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_psdev.h>
struct presto_reservation_data {
unsigned int ri_recno;
loff_t ri_offset;
loff_t ri_size;
struct list_head ri_list;
};
/*
* Locking Semantics
*
* write lock in struct presto_log_fd:
* - name: fd_lock
* - required for: accessing any field in a presto_log_fd
* - may not be held across I/O
* -
*
*/
/*
* 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 moves 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;
if (rec->is_kml)
rec->offset += fset->fset_kml_logical_off;
rec->recno = fd->fd_recno;
/* add the reservation data to the end of the list */
rd->ri_offset = fd->fd_offset;
rd->ri_size = rec->size;
rd->ri_recno = rec->recno;
list_add(&rd->ri_list, fd->fd_reservations.prev);
fd->fd_offset += rec->size;
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);
}
/* XXX should we ask for do_truncate to be exported? */
int izo_do_truncate(struct presto_file_set *fset, struct dentry *dentry,
loff_t length, loff_t size_check)
{
struct inode *inode = dentry->d_inode;
int error;
struct iattr newattrs;
ENTRY;
if (length < 0) {
EXIT;
return -EINVAL;
}
down(&inode->i_sem);
lock_kernel();
if (size_check != inode->i_size) {
unlock_kernel();
up(&inode->i_sem);
EXIT;
return -EALREADY;
}
newattrs.ia_size = length;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
if (inode->i_op && inode->i_op->setattr)
error = inode->i_op->setattr(dentry, &newattrs);
else {
inode_setattr(dentry->d_inode, &newattrs);
error = 0;
}
unlock_kernel();
up(&inode->i_sem);
EXIT;
return error;
}
static void presto_kml_truncate(struct presto_file_set *fset)
{
int rc;
ENTRY;
write_lock(&fset->fset_kml.fd_lock);
if (fset->fset_kml.fd_truncating == 1 ) {
write_unlock(&fset->fset_kml.fd_lock);
EXIT;
return;
}
fset->fset_kml.fd_truncating = 1;
write_unlock(&fset->fset_kml.fd_lock);
CERROR("islento: %d, count: %d\n",
ISLENTO(presto_i2m(fset->fset_dentry->d_inode)),
fset->fset_permit_count);
rc = izo_upc_kml_truncate(fset->fset_cache->cache_psdev->uc_minor,
fset->fset_lento_off, fset->fset_lento_recno,
fset->fset_name);
/* Userspace is the only permitholder now, and will retain an exclusive
* hold on the permit until KML truncation completes. */
/* FIXME: double check this code path now that the precise semantics of
* fset->fset_permit_count have changed. */
if (rc != 0) {
write_lock(&fset->fset_kml.fd_lock);
fset->fset_kml.fd_truncating = 0;
write_unlock(&fset->fset_kml.fd_lock);
}
EXIT;
}
void *presto_trans_start(struct presto_file_set *fset, struct inode *inode,
int op)
{
ENTRY;
if ( !fset->fset_cache->cache_filter->o_trops ) {
EXIT;
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 ) {
EXIT;
return;
}
fset->fset_cache->cache_filter->o_trops->tr_commit(fset, handle);
/* Check to see if the KML needs truncated. */
if (fset->kml_truncate_size > 0 &&
!fset->fset_kml.fd_truncating &&
fset->fset_kml.fd_offset > fset->kml_truncate_size) {
CDEBUG(D_JOURNAL, "kml size: %lu; truncating\n",
(unsigned long)fset->fset_kml.fd_offset);
presto_kml_truncate(fset);
}
EXIT;
}
inline int presto_no_journal(struct presto_file_set *fset)
{
int minor = fset->fset_cache->cache_psdev->uc_minor;
return izo_channels[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, 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 kml_prefix_hdr p;
u32 loggroups[NGROUPS_MAX];
int i;
p.len = cpu_to_le32(rec->size);
p.version = KML_MAJOR_VERSION | KML_MINOR_VERSION;
p.pid = cpu_to_le32(current->pid);
p.auid = 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++)
loggroups[i] = cpu_to_le32((__u32) groups[i]);
buf = logit(buf, &p, sizeof(struct kml_prefix_hdr));
buf = logit(buf, &loggroups, 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_dentry_version(char *buf, struct dentry *dentry)
{
struct presto_version version;
presto_getversion(&version, dentry->d_inode);
version.pv_mtime = HTON__u64(version.pv_mtime);
version.pv_ctime = HTON__u64(version.pv_ctime);
version.pv_size = HTON__u64(version.pv_size);
return logit(buf, &version, sizeof(version));
}
static inline char *log_version(char *buf, struct presto_version *pv)
{
struct presto_version version;
memcpy(&version, pv, sizeof(version));
version.pv_mtime = HTON__u64(version.pv_mtime);
version.pv_ctime = HTON__u64(version.pv_ctime);
version.pv_size = HTON__u64(version.pv_size);
return logit(buf, &version, sizeof(version));
}
static inline char *log_rollback(char *buf, struct izo_rollback_data *rb)
{
struct izo_rollback_data rollback;
memcpy(&rollback, rb, sizeof(rollback));
rollback.rb_mode = HTON__u32(rollback.rb_mode);
rollback.rb_rdev = HTON__u32(rollback.rb_rdev);
rollback.rb_uid = HTON__u64(rollback.rb_uid);
rollback.rb_gid = HTON__u64(rollback.rb_gid);
return logit(buf, &rollback, sizeof(rollback));
}
static inline char *journal_log_suffix(char *buf, char *log,
struct presto_file_set *fset,
struct dentry *dentry,
struct rec_info *rec)
{
struct kml_suffix s;
struct kml_prefix_hdr *p = (struct kml_prefix_hdr *)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 -
presto_d2d(dentry)->dd_kml_offset);
presto_d2d(dentry)->dd_kml_offset = 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 = p->len;
return logit(buf, &s, sizeof(s));
}
int izo_log_close(struct presto_log_fd *logfd)
{
int rc = 0;
if (logfd->fd_file) {
rc = filp_close(logfd->fd_file, 0);
logfd->fd_file = NULL;
} else
CERROR("InterMezzo: %s: no filp\n", __FUNCTION__);
if (rc != 0)
CERROR("InterMezzo: close files: filp won't close: %d\n", rc);
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) {
CERROR("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)
CERROR("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) {
CDEBUG(D_FILE, "presto_fread: read %d bytes instead of "
"%d at %Ld\n", rc, len, *off);
rc = -EIO;
}
set_fs(old_fs);
EXIT;
return rc;
}
loff_t presto_kml_offset(struct presto_file_set *fset)
{
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;
}
write_unlock(&fd->fd_lock);
return offset;
}
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 ) {
CERROR("presto_kml_dispatch: smoke is coming\n");
write_unlock(&fd->fd_lock);
EXIT;
return 0;
} else if ( kml_recno == fset->fset_lento_recno ) {
write_unlock(&fd->fd_lock);
EXIT;
return 0;
/* XXX add a further "if" here to delay the KML upcall */
#if 0
} else if ( kml_recno < fset->fset_lento_recno + 100) {
write_unlock(&fd->fd_lock);
EXIT;
return 0;
#endif
}
CDEBUG(D_PIOCTL, "fset: %s\n", fset->fset_name);
rc = izo_upc_kml(fset->fset_cache->cache_psdev->uc_minor,
fset->fset_lento_off, fset->fset_lento_recno,
offset + fset->fset_kml_logical_off, kml_recno,
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;
}
int izo_lookup_file(struct presto_file_set *fset, char *path,
struct nameidata *nd)
{
int error = 0;
CDEBUG(D_CACHE, "looking up: %s\n", path);
if (path_init(path, LOOKUP_PARENT, nd))
error = path_walk(path, nd);
if (error) {
EXIT;
return error;
}
return 0;
}
/* FIXME: this function is a mess of locking and error handling. There's got to
* be a better way. */
static int do_truncate_rename(struct presto_file_set *fset, char *oldname,
char *newname)
{
struct dentry *old_dentry, *new_dentry;
struct nameidata oldnd, newnd;
char *oldpath, *newpath;
int error;
ENTRY;
oldpath = izo_make_path(fset, oldname);
if (oldpath == NULL) {
EXIT;
return -ENOENT;
}
newpath = izo_make_path(fset, newname);
if (newpath == NULL) {
error = -ENOENT;
EXIT;
goto exit;
}
if ((error = izo_lookup_file(fset, oldpath, &oldnd)) != 0) {
EXIT;
goto exit1;
}
if ((error = izo_lookup_file(fset, newpath, &newnd)) != 0) {
EXIT;
goto exit2;
}
double_lock(newnd.dentry, oldnd.dentry);
old_dentry = lookup_hash(&oldnd.last, oldnd.dentry);
error = PTR_ERR(old_dentry);
if (IS_ERR(old_dentry)) {
EXIT;
goto exit3;
}
error = -ENOENT;
if (!old_dentry->d_inode) {
EXIT;
goto exit4;
}
new_dentry = lookup_hash(&newnd.last, newnd.dentry);
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry)) {
EXIT;
goto exit4;
}
{
extern int presto_rename(struct inode *old_dir,struct dentry *old_dentry,
struct inode *new_dir,struct dentry *new_dentry);
error = presto_rename(old_dentry->d_parent->d_inode, old_dentry,
new_dentry->d_parent->d_inode, new_dentry);
}
dput(new_dentry);
EXIT;
exit4:
dput(old_dentry);
exit3:
double_up(&newnd.dentry->d_inode->i_sem, &oldnd.dentry->d_inode->i_sem);
path_release(&newnd);
exit2:
path_release(&oldnd);
exit1:
PRESTO_FREE(newpath, strlen(newpath) + 1);
exit:
PRESTO_FREE(oldpath, strlen(oldpath) + 1);
return error;
}
/* This function is called with the fset->fset_kml.fd_lock held */
int presto_finish_kml_truncate(struct presto_file_set *fset,
unsigned long int offset)
{
struct lento_vfs_context info;
void *handle;
struct file *f;
struct dentry *dentry;
int error = 0, len;
struct nameidata nd;
char *kmlpath = NULL, *smlpath = NULL;
ENTRY;
if (offset == 0) {
/* Lento couldn't do what it needed to; abort the truncation. */
fset->fset_kml.fd_truncating = 0;
EXIT;
return 0;
}
/* someone is about to write to the end of the KML; try again later. */
if ( !list_empty(&fset->fset_kml.fd_reservations) ) {
EXIT;
return -EAGAIN;
}
f = presto_copy_kml_tail(fset, offset);
if (IS_ERR(f)) {
EXIT;
return PTR_ERR(f);
}
/* In a single transaction:
*
* - unlink 'kml'
* - rename 'kml_tmp' to 'kml'
* - unlink 'sml'
* - rename 'sml_tmp' to 'sml'
* - rewrite the first record of last_rcvd with the new kml
* offset.
*/
handle = presto_trans_start(fset, fset->fset_dentry->d_inode,
KML_OPCODE_KML_TRUNC);
if (IS_ERR(handle)) {
presto_release_space(fset->fset_cache, PRESTO_REQLOW);
CERROR("ERROR: presto_finish_kml_truncate: no space for transaction\n");
EXIT;
return -ENOMEM;
}
memset(&info, 0, sizeof(info));
info.flags = LENTO_FL_IGNORE_TIME;
kmlpath = izo_make_path(fset, "kml");
if (kmlpath == NULL) {
error = -ENOMEM;
CERROR("make_path failed: ENOMEM\n");
EXIT;
goto exit_commit;
}
if ((error = izo_lookup_file(fset, kmlpath, &nd)) != 0) {
CERROR("izo_lookup_file(kml) failed: %d.\n", error);
EXIT;
goto exit_commit;
}
down(&nd.dentry->d_inode->i_sem);
dentry = lookup_hash(&nd.last, nd.dentry);
error = PTR_ERR(dentry);
if (IS_ERR(dentry)) {
up(&nd.dentry->d_inode->i_sem);
path_release(&nd);
CERROR("lookup_hash failed\n");
EXIT;
goto exit_commit;
}
error = presto_do_unlink(fset, dentry->d_parent, dentry, &info);
dput(dentry);
up(&nd.dentry->d_inode->i_sem);
path_release(&nd);
if (error != 0) {
CERROR("presto_do_unlink(kml) failed: %d.\n", error);
EXIT;
goto exit_commit;
}
smlpath = izo_make_path(fset, "sml");
if (smlpath == NULL) {
error = -ENOMEM;
CERROR("make_path() failed: ENOMEM\n");
EXIT;
goto exit_commit;
}
if ((error = izo_lookup_file(fset, smlpath, &nd)) != 0) {
CERROR("izo_lookup_file(sml) failed: %d.\n", error);
EXIT;
goto exit_commit;
}
down(&nd.dentry->d_inode->i_sem);
dentry = lookup_hash(&nd.last, nd.dentry);
error = PTR_ERR(dentry);
if (IS_ERR(dentry)) {
up(&nd.dentry->d_inode->i_sem);
path_release(&nd);
CERROR("lookup_hash failed\n");
EXIT;
goto exit_commit;
}
error = presto_do_unlink(fset, dentry->d_parent, dentry, &info);
dput(dentry);
up(&nd.dentry->d_inode->i_sem);
path_release(&nd);
if (error != 0) {
CERROR("presto_do_unlink(sml) failed: %d.\n", error);
EXIT;
goto exit_commit;
}
error = do_truncate_rename(fset, "kml_tmp", "kml");
if (error != 0)
CERROR("do_truncate_rename(kml_tmp, kml) failed: %d\n", error);
error = do_truncate_rename(fset, "sml_tmp", "sml");
if (error != 0)
CERROR("do_truncate_rename(sml_tmp, sml) failed: %d\n", error);
/* Write a new 'last_rcvd' record with the new KML offset */
fset->fset_kml_logical_off += offset;
CDEBUG(D_CACHE, "new kml_logical_offset: %Lu\n",
fset->fset_kml_logical_off);
if (presto_write_kml_logical_offset(fset) != 0) {
CERROR("presto_write_kml_logical_offset failed\n");
}
presto_trans_commit(fset, handle);
/* Everything was successful, so swap the KML file descriptors */
filp_close(fset->fset_kml.fd_file, NULL);
fset->fset_kml.fd_file = f;
fset->fset_kml.fd_offset -= offset;
fset->fset_kml.fd_truncating = 0;
EXIT;
return 0;
exit_commit:
presto_trans_commit(fset, handle);
len = strlen("/.intermezzo/") + strlen(fset->fset_name) +strlen("sml");
if (kmlpath != NULL)
PRESTO_FREE(kmlpath, len);
if (smlpath != NULL)
PRESTO_FREE(smlpath, len);
return error;
}
/* 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 kml_suffix);
rc = presto_fwrite(f, buf, prefix_size, off);
if ( rc != prefix_size ) {
CERROR("Write error!\n");
EXIT;
return -EIO;
}
if ( string1 && len1 ) {
rc = presto_fwrite(f, string1, len1, off);
if ( rc != len1 ) {
CERROR("Write error!\n");
EXIT;
return -EIO;
}
}
if ( string2 && len2 ) {
rc = presto_fwrite(f, string2, len2, off);
if ( rc != len2 ) {
CERROR("Write error!\n");
EXIT;
return -EIO;
}
}
if ( string3 && len3 ) {
rc = presto_fwrite(f, string3, len3, off);
if ( rc != len3 ) {
CERROR("Write error!\n");
EXIT;
return -EIO;
}
}
rc = presto_fwrite(f, buf + prefix_size,
sizeof(struct kml_suffix), off);
if ( rc != sizeof(struct kml_suffix) ) {
CERROR("Write error!\n");
EXIT;
return -EIO;
}
return 0;
}
/*
* rec->size must be valid prior to calling this function.
*
* had to export this for branch_reinter in kml_reint.c
*/
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 kml_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);
if (rec->is_kml) {
if (rec->offset < fset->fset_kml_logical_off) {
CERROR("record with pre-trunc offset. tell phil.\n");
BUG();
}
offset = rec->offset - fset->fset_kml_logical_off;
} else {
offset = rec->offset;
}
/* now we know the record number */
prefix_size = size - sizeof(struct kml_suffix);
s = (struct kml_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) {
CERROR("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 kml_suffix suffix;
int rc;
loff_t zeroes;
*recno = 0;
*tail_offset = 0;
*size = 0;
if (tail < sizeof(struct kml_prefix_hdr) + 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) + sizeof(int);
rc = presto_fread(fd->fd_file, (char *)&suffix, sizeof(suffix), &zeroes);
if ( rc != sizeof(suffix) ) {
EXIT;
return rc;
}
if ( suffix.len > 500 ) {
CERROR("InterMezzo: 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 izo_kml_last_recno(struct presto_log_fd *logfd)
{
int rc;
loff_t size;
loff_t tail_offset;
int recno;
loff_t tail = logfd->fd_file->f_dentry->d_inode->i_size;
rc = presto_last_record(logfd, &size, &tail_offset, &recno, tail);
if (rc != 0) {
EXIT;
return rc;
}
logfd->fd_offset = tail_offset;
logfd->fd_recno = recno;
CDEBUG(D_JOURNAL, "setting fset_kml->fd_recno to %d, offset %Ld\n",
recno, tail_offset);
EXIT;
return 0;
}
struct file *izo_log_open(struct presto_file_set *fset, char *name, int flags)
{
struct presto_cache *cache = fset->fset_cache;
struct file *f;
int error;
ENTRY;
f = izo_fset_open(fset, name, flags, 0644);
error = PTR_ERR(f);
if (IS_ERR(f)) {
EXIT;
return f;
}
error = -EINVAL;
if ( cache != presto_get_cache(f->f_dentry->d_inode) ) {
CERROR("InterMezzo: %s cache does not match fset cache!\n",name);
fset->fset_kml.fd_file = NULL;
filp_close(f, NULL);
f = NULL;
EXIT;
return f;
}
if (cache->cache_filter && cache->cache_filter->o_trops &&
cache->cache_filter->o_trops->tr_journal_data) {
cache->cache_filter->o_trops->tr_journal_data
(f->f_dentry->d_inode);
} else {
CERROR("InterMezzo WARNING: no file data logging!\n");
}
EXIT;
return f;
}
int izo_init_kml_file(struct presto_file_set *fset, struct presto_log_fd *logfd)
{
int error = 0;
struct file *f;
ENTRY;
if (logfd->fd_file) {
CDEBUG(D_INODE, "fset already has KML open\n");
EXIT;
return 0;
}
logfd->fd_lock = RW_LOCK_UNLOCKED;
INIT_LIST_HEAD(&logfd->fd_reservations);
f = izo_log_open(fset, "kml", O_RDWR | O_CREAT);
if (IS_ERR(f)) {
error = PTR_ERR(f);
return error;
}
logfd->fd_file = f;
error = izo_kml_last_recno(logfd);
if (error) {
logfd->fd_file = NULL;
filp_close(f, NULL);
CERROR("InterMezzo: IO error in KML of fset %s\n",
fset->fset_name);
EXIT;
return error;
}
fset->fset_lento_off = logfd->fd_offset;
fset->fset_lento_recno = logfd->fd_recno;
EXIT;
return error;
}
int izo_init_last_rcvd_file(struct presto_file_set *fset, struct presto_log_fd *logfd)
{
int error = 0;
struct file *f;
struct rec_info recinfo;
ENTRY;
if (logfd->fd_file != NULL) {
CDEBUG(D_INODE, "fset already has last_rcvd open\n");
EXIT;
return 0;
}
logfd->fd_lock = RW_LOCK_UNLOCKED;
INIT_LIST_HEAD(&logfd->fd_reservations);
f = izo_log_open(fset, "last_rcvd", O_RDWR | O_CREAT);
if (IS_ERR(f)) {
error = PTR_ERR(f);
return error;
}
logfd->fd_file = f;
logfd->fd_offset = f->f_dentry->d_inode->i_size;
error = izo_rep_cache_init(fset);
if (presto_read_kml_logical_offset(&recinfo, fset) == 0) {
fset->fset_kml_logical_off = recinfo.offset;
} else {
/* The 'last_rcvd' file doesn't contain a kml offset record,
* probably because we just created 'last_rcvd'. Write one. */
fset->fset_kml_logical_off = 0;
presto_write_kml_logical_offset(fset);
}
EXIT;
return error;
}
int izo_init_lml_file(struct presto_file_set *fset, struct presto_log_fd *logfd)
{
int error = 0;
struct file *f;
ENTRY;
if (logfd->fd_file) {
CDEBUG(D_INODE, "fset already has lml open\n");
EXIT;
return 0;
}
logfd->fd_lock = RW_LOCK_UNLOCKED;
INIT_LIST_HEAD(&logfd->fd_reservations);
f = izo_log_open(fset, "lml", O_RDWR | O_CREAT);
if (IS_ERR(f)) {
error = PTR_ERR(f);
return error;
}
logfd->fd_file = f;
logfd->fd_offset = f->f_dentry->d_inode->i_size;
EXIT;
return error;
}
/* Get the KML-offset record from the last_rcvd file */
int presto_read_kml_logical_offset(struct rec_info *recinfo,
struct presto_file_set *fset)
{
loff_t off;
struct izo_rcvd_rec rec;
char uuid[16] = {0};
off = izo_rcvd_get(&rec, fset, uuid);
if (off < 0)
return -1;
recinfo->offset = rec.lr_local_offset;
return 0;
}
int presto_write_kml_logical_offset(struct presto_file_set *fset)
{
loff_t rc;
struct izo_rcvd_rec rec;
char uuid[16] = {0};
rc = izo_rcvd_get(&rec, fset, uuid);
if (rc < 0)
memset(&rec, 0, sizeof(rec));
rec.lr_local_offset =
cpu_to_le64(fset->fset_kml_logical_off);
return izo_rcvd_write(fset, &rec);
}
struct file * presto_copy_kml_tail(struct presto_file_set *fset,
unsigned long int start)
{
struct file *f;
int len;
loff_t read_off, write_off, bytes;
ENTRY;
/* Copy the tail of 'kml' to 'kml_tmp' */
f = izo_log_open(fset, "kml_tmp", O_RDWR);
if (IS_ERR(f)) {
EXIT;
return f;
}
write_off = 0;
read_off = start;
bytes = fset->fset_kml.fd_offset - start;
while (bytes > 0) {
char buf[4096];
int toread;
if (bytes > sizeof(buf))
toread = sizeof(buf);
else
toread = bytes;
len = presto_fread(fset->fset_kml.fd_file, buf, toread,
&read_off);
if (len <= 0)
break;
if (presto_fwrite(f, buf, len, &write_off) != len) {
filp_close(f, NULL);
EXIT;
return ERR_PTR(-EIO);
}
bytes -= len;
}
EXIT;
return f;
}
/* LML records here */
/* this writes an LML record to the LML file (rec->is_kml =0) */
int presto_write_lml_close(struct rec_info *rec,
struct presto_file_set *fset,
struct file *file,
__u64 remote_ino,
__u64 remote_generation,
struct presto_version *remote_version,
struct presto_version *new_file_ver)
{
int opcode = KML_OPCODE_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_dentry;
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 kml_prefix_hdr) + sizeof(*new_file_ver) +
sizeof(ino) + sizeof(generation) + sizeof(pathlen) +
sizeof(remote_ino) + sizeof(remote_generation) +
sizeof(remote_version) + sizeof(rec->offset) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, 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 = log_version(logrecord, 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;
}
/*
* 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 kml_prefix_hdr 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 != KML_OPCODE_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, KML_OPCODE_TRUNC);
if ( IS_ERR(handle) ) {
EXIT;
rc = -ENOMEM;
goto tr_out;
}
rc = izo_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) {
CERROR("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 kml_prefix_hdr record;
loff_t offset = lml_offset;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
CDEBUG(D_JOURNAL, "reading prefix: off %ld, size %d\n",
(long)lml_offset, sizeof(record));
rc = presto_fread(fset->fset_lml.fd_file, (char *)&record,
sizeof(record), &offset);
if ( rc != sizeof(record) ) {
CERROR("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 = KML_OPCODE_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 izo_rollback_data *rb, struct iattr *iattr)
{
int opcode = KML_OPCODE_SETATTR;
char *buffer, *path, *logrecord, record[316];
struct dentry *root;
__u32 uid, gid, mode, valid, flags, pathlen;
__u64 fsize, mtime, ctime;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
if (!dentry->d_inode || (dentry->d_inode->i_nlink == 0)
|| ((dentry->d_parent != dentry) && list_empty(&dentry->d_hash))) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + sizeof(*old_ver) +
sizeof(valid) + sizeof(mode) + sizeof(uid) + sizeof(gid) +
sizeof(fsize) + sizeof(mtime) + sizeof(ctime) + sizeof(flags) +
sizeof(pathlen) + sizeof(*rb) + sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, 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 = log_rollback(logrecord, rb);
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_get_fileid(int minor, struct presto_file_set *fset,
struct dentry *dentry)
{
int opcode = KML_OPCODE_GET_FILEID;
struct rec_info rec;
char *buffer, *path, *logrecord, record[4096]; /*include path*/
struct dentry *root;
__u32 uid, gid, pathlen;
int error, size;
struct kml_suffix *suffix;
ENTRY;
root = fset->fset_dentry;
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 kml_prefix_hdr) + sizeof(pathlen) +
size_round(le32_to_cpu(pathlen)) +
sizeof(struct kml_suffix);
CDEBUG(D_FILE, "kml size: %d\n", size);
if ( size > sizeof(record) )
CERROR("InterMezzo: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
memset(&rec, 0, sizeof(rec));
rec.is_kml = 1;
rec.size = size;
logrecord = journal_log_prefix(record, opcode, &rec);
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, path, size_round(le32_to_cpu(pathlen)));
suffix = (struct kml_suffix *)logrecord;
logrecord = journal_log_suffix(logrecord, record, fset, dentry, &rec);
/* journal_log_suffix expects journal_log to set this */
suffix->recno = 0;
CDEBUG(D_FILE, "actual kml size: %d\n", logrecord - record);
CDEBUG(D_FILE, "get fileid: uid %d, gid %d, path: %s\n", uid, gid,path);
error = izo_upc_get_fileid(minor, size, record,
size_round(le32_to_cpu(pathlen)), path,
fset->fset_name);
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 = KML_OPCODE_CREATE;
char *buffer, *path, *logrecord, record[292];
struct dentry *root;
__u32 uid, gid, lmode, pathlen;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(lmode) + sizeof(uid) + sizeof(gid) + sizeof(pathlen) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, dentry->d_parent);
logrecord = log_version(logrecord, 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 = KML_OPCODE_SYMLINK;
char *buffer, *path, *logrecord, record[292];
struct dentry *root;
__u32 uid, gid, pathlen;
__u32 targetlen = cpu_to_le32(strlen(target));
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(uid) + sizeof(gid) + sizeof(pathlen) +
sizeof(targetlen) + sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, dentry->d_parent);
logrecord = log_version(logrecord, 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 = KML_OPCODE_MKDIR;
char *buffer, *path, *logrecord, record[292];
struct dentry *root;
__u32 uid, gid, lmode, pathlen;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(lmode) + sizeof(uid) + sizeof(gid) + sizeof(pathlen) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, dentry->d_parent);
logrecord = log_version(logrecord, 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,
struct izo_rollback_data *rb, int len, const char *name)
{
int opcode = KML_OPCODE_RMDIR;
char *buffer, *path, *logrecord, record[316];
__u32 pathlen, llen;
struct dentry *root;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(pathlen) + sizeof(llen) + sizeof(*rb) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, dir);
logrecord = log_version(logrecord, old_dir_ver);
logrecord = logit(logrecord, rb, sizeof(*rb));
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 = KML_OPCODE_MKNOD;
char *buffer, *path, *logrecord, record[292];
struct dentry *root;
__u32 uid, gid, lmode, lmajor, lminor, pathlen;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(lmode) + sizeof(uid) + sizeof(gid) + sizeof(lmajor) +
sizeof(lminor) + sizeof(pathlen) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, dentry->d_parent);
logrecord = log_version(logrecord, 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 = KML_OPCODE_LINK;
char *buffer, *srcbuffer, *path, *srcpath, *logrecord, record[292];
__u32 pathlen, srcpathlen;
struct dentry *root;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(srcpathlen) + sizeof(pathlen) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, tgt->d_parent);
logrecord = log_version(logrecord, 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 = KML_OPCODE_RENAME;
char *buffer, *srcbuffer, *path, *srcpath, *logrecord, record[292];
__u32 pathlen, srcpathlen;
struct dentry *root;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + 4 * sizeof(*src_dir_ver) +
sizeof(srcpathlen) + sizeof(pathlen) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, src_dir_ver);
logrecord = log_dentry_version(logrecord, src->d_parent);
logrecord = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_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,
struct izo_rollback_data *rb, struct dentry *dentry,
char *old_target, int old_targetlen)
{
int opcode = KML_OPCODE_UNLINK;
char *buffer, *path, *logrecord, record[316];
const char *name;
__u32 pathlen, llen;
struct dentry *root;
int error, size, len;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
name = dentry->d_name.name;
len = dentry->d_name.len;
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 kml_prefix_hdr) + 3 * sizeof(*tgt_dir_ver) +
sizeof(pathlen) + sizeof(llen) + sizeof(*rb) +
sizeof(old_targetlen) + sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
rec->is_kml = 1;
rec->size = size + size_round(le32_to_cpu(pathlen)) + size_round(len) +
size_round(old_targetlen);
logrecord = journal_log_prefix(record, opcode, rec);
logrecord = log_version(logrecord, tgt_dir_ver);
logrecord = log_dentry_version(logrecord, dir);
logrecord = log_version(logrecord, old_file_ver);
logrecord = log_rollback(logrecord, rb);
logrecord = logit(logrecord, &pathlen, sizeof(pathlen));
logrecord = logit(logrecord, &llen, sizeof(llen));
logrecord = logit(logrecord, &old_targetlen, sizeof(old_targetlen));
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),
old_target, size_round(old_targetlen));
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 *old_file_ver,
struct presto_version *new_file_ver)
{
int opcode = KML_OPCODE_CLOSE;
struct presto_file_data *fd;
char *buffer, *path, *logrecord, record[316];
struct dentry *root;
int error, size, i;
__u32 pathlen, generation;
__u64 ino;
__u32 open_fsuid;
__u32 open_fsgid;
__u32 open_ngroups;
__u32 open_groups[NGROUPS_MAX];
__u32 open_mode;
__u32 open_uid;
__u32 open_gid;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
if (!dentry->d_inode || (dentry->d_inode->i_nlink == 0)
|| ((dentry->d_parent != dentry) && list_empty(&dentry->d_hash))) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) + sizeof(*old_file_ver) +
sizeof(*new_file_ver) + sizeof(ino) + sizeof(generation) +
sizeof(pathlen) + sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, old_file_ver);
logrecord = log_version(logrecord, 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 = KML_OPCODE_CLOSE;
char *logrecord, record[292];
struct dentry *root;
int error, size;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
root = fset->fset_dentry;
size = sizeof(__u32) * ngroups +
sizeof(struct kml_prefix_hdr) + sizeof(*new_file_ver) +
sizeof(ino) + sizeof(generation) +
sizeof(le32_to_cpu(pathlen)) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, 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 kml_prefix_hdr 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;
CERROR("presto_complete_lml: ioerror - 1, tell Peter\n");
return -EIO;
}
if ( prefix.opcode == KML_OPCODE_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;
CERROR("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;
CERROR("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;
CERROR("presto_complete_lml: ioerror - 4, tell Peter\n");
return -EIO;
}
handle = presto_trans_start(fset, file->f_dentry->d_inode,
KML_OPCODE_RELEASE);
if ( IS_ERR(handle) ) {
EXIT;
return -ENOMEM;
}
rc = presto_clear_lml_close(fset, lml_offset);
if ( rc ) {
CERROR("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 ) {
CERROR("error during rewrite close: %d\n", rc);
presto_trans_commit(fset, handle);
EXIT;
return rc;
}
presto_trans_commit(fset, handle);
if ( rc ) {
CERROR("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) ?
KML_OPCODE_DELEXTATTR :
KML_OPCODE_SETEXTATTR ;
char *temp, *path, *logrecord, record[292];
struct dentry *root;
int error, size;
__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, pathlen;
ENTRY;
if ( presto_no_journal(fset) ) {
EXIT;
return 0;
}
if (!dentry->d_inode || (dentry->d_inode->i_nlink == 0)
|| ((dentry->d_parent != dentry) && list_empty(&dentry->d_hash))) {
EXIT;
return 0;
}
root = fset->fset_dentry;
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 kml_prefix_hdr) +
2 * sizeof(struct presto_version) +
sizeof(flags) + sizeof(mode) + sizeof(namelen) +
sizeof(buflen) + sizeof(pathlen) +
sizeof(struct kml_suffix);
if ( size > sizeof(record) )
CERROR("InterMezzo: 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 = log_version(logrecord, ver);
logrecord = log_dentry_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