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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [intermezzo/] [journal.c] - Rev 1765
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/* -*- 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