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openafs/src/vol/namei_ops.c
Andrew Deason 6d59a0fcd0 Fix warning in vol/namei_ops.c 
Commit 906403c6d7 introduced a warning by
making 'error' unused anywhere. Remove the declaration, as well.

Reviewed-on: http://gerrit.openafs.org/620
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
2009-10-08 16:18:27 -07:00

1915 lines
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/*
* Copyright 2000, International Business Machines Corporation and others.
* All Rights Reserved.
*
* This software has been released under the terms of the IBM Public
* License. For details, see the LICENSE file in the top-level source
* directory or online at http://www.openafs.org/dl/license10.html
*/
/* I/O operations for the Unix open by name (namei) interface. */
#include <afsconfig.h>
#include <afs/param.h>
#ifdef AFS_NAMEI_ENV
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <dirent.h>
#include <afs/assert.h>
#include <string.h>
#include <sys/file.h>
#include <sys/param.h>
#include <lock.h>
#if defined(AFS_SUN5_ENV) || defined(AFS_HPUX_ENV)
#include <unistd.h>
#endif
#include <afs/afsutil.h>
#include <lwp.h>
#include "nfs.h"
#include <afs/afsint.h>
#include "ihandle.h"
#include "vnode.h"
#include "volume.h"
#include "viceinode.h"
#include "voldefs.h"
#include "partition.h"
#include "fssync.h"
#include <afs/errors.h>
/*@+fcnmacros +macrofcndecl@*/
#ifdef O_LARGEFILE
#ifdef S_SPLINT_S
extern off64_t afs_lseek(int FD, off64_t O, int F);
#endif /*S_SPLINT_S */
#define afs_lseek(FD, O, F) lseek64(FD, (off64_t)(O), F)
#define afs_stat stat64
#define afs_fstat fstat64
#define afs_open open64
#define afs_fopen fopen64
#else /* !O_LARGEFILE */
#ifdef S_SPLINT_S
extern off_t afs_lseek(int FD, off_t O, int F);
#endif /*S_SPLINT_S */
#define afs_lseek(FD, O, F) lseek(FD, (off_t)(O), F)
#define afs_stat stat
#define afs_fstat fstat
#define afs_open open
#define afs_fopen fopen
#endif /* !O_LARGEFILE */
/*@=fcnmacros =macrofcndecl@*/
/*@printflike@*/ extern void Log(const char *format, ...);
#ifndef LOCK_SH
#define LOCK_SH 1 /* shared lock */
#define LOCK_EX 2 /* exclusive lock */
#define LOCK_NB 4 /* don't block when locking */
#define LOCK_UN 8 /* unlock */
#endif
#ifndef HAVE_FLOCK
#include <fcntl.h>
/*
* This function emulates a subset of flock()
*/
int
emul_flock(int fd, int cmd)
{ struct flock f;
memset(&f, 0, sizeof (f));
if (cmd & LOCK_UN)
f.l_type = F_UNLCK;
if (cmd & LOCK_SH)
f.l_type = F_RDLCK;
if (cmd & LOCK_EX)
f.l_type = F_WRLCK;
return fcntl(fd, (cmd & LOCK_NB) ? F_SETLK : F_SETLKW, &f);
}
#define flock(f,c) emul_flock(f,c)
#endif
int Testing=0;
afs_sfsize_t
namei_iread(IHandle_t * h, afs_foff_t offset, char *buf, afs_fsize_t size)
{
afs_sfsize_t nBytes;
FdHandle_t *fdP;
fdP = IH_OPEN(h);
if (fdP == NULL)
return -1;
if (FDH_SEEK(fdP, offset, SEEK_SET) < 0) {
FDH_REALLYCLOSE(fdP);
return -1;
}
nBytes = FDH_READ(fdP, buf, size);
FDH_CLOSE(fdP);
return nBytes;
}
afs_sfsize_t
namei_iwrite(IHandle_t * h, afs_foff_t offset, char *buf, afs_fsize_t size)
{
afs_sfsize_t nBytes;
FdHandle_t *fdP;
fdP = IH_OPEN(h);
if (fdP == NULL)
return -1;
if (FDH_SEEK(fdP, offset, SEEK_SET) < 0) {
FDH_REALLYCLOSE(fdP);
return -1;
}
nBytes = FDH_WRITE(fdP, buf, size);
FDH_CLOSE(fdP);
return nBytes;
}
/* Inode number format:
* low 26 bits - vnode number - all 1's if volume special file.
* next 3 bits - tag
* next 3 bits spare (0's)
* high 32 bits - uniquifier (regular) or type if spare
*/
#define NAMEI_VNODEMASK 0x003ffffff
#define NAMEI_TAGMASK 0x7
#define NAMEI_TAGSHIFT 26
#define NAMEI_UNIQMASK 0xffffffff
#define NAMEI_UNIQSHIFT 32
#define NAMEI_INODESPECIAL ((Inode)NAMEI_VNODEMASK)
#define NAMEI_VNODESPECIAL NAMEI_VNODEMASK
/* dir1 is the high 8 bits of the 26 bit vnode */
#define VNO_DIR1(vno) ((vno >> 14) & 0xff)
/* dir2 is the next 9 bits */
#define VNO_DIR2(vno) ((vno >> 9) & 0x1ff)
/* "name" is the low 9 bits of the vnode, the 3 bit tag and the uniq */
#define NAMEI_SPECDIR "special"
#define NAMEI_SPECDIRLEN (sizeof(NAMEI_SPECDIR)-1)
#define NAMEI_MAXVOLS 5 /* Maximum supported number of volumes per volume
* group, not counting temporary (move) volumes.
* This is the number of separate files, all having
* the same vnode number, which can occur in a volume
* group at once.
*/
typedef struct {
int ogm_owner;
int ogm_group;
int ogm_mode;
} namei_ogm_t;
static int namei_GetLinkCount2(FdHandle_t * h, Inode ino, int lockit, int fixup, int nowrite);
static int GetFreeTag(IHandle_t * ih, int vno);
/* namei_HandleToInodeDir
*
* Construct the path name of the directory holding the inode data.
* Format: /<vicepx>/INODEDIR
*
*/
#define PNAME_BLEN 64
static void
namei_HandleToInodeDir(namei_t * name, IHandle_t * ih)
{
size_t offset;
memset(name, '\0', sizeof(*name));
/*
* Add the /vicepXX string to the start of name->n_base and then calculate
* offset as the number of bytes we know we added.
*
* FIXME: This embeds knowledge of the vice partition naming scheme and
* mapping from device numbers. There needs to be an API that tells us
* this offset.
*/
volutil_PartitionName_r(ih->ih_dev, name->n_base, sizeof(name->n_base));
offset = VICE_PREFIX_SIZE + (ih->ih_dev > 25 ? 2 : 1);
name->n_base[offset] = '/';
offset++;
strlcpy(name->n_base + offset, INODEDIR, sizeof(name->n_base) - offset);
strlcpy(name->n_path, name->n_base, sizeof(name->n_path));
}
#define addtoname(N, C) \
do { \
strlcat((N)->n_path, "/", sizeof((N)->n_path)); \
strlcat((N)->n_path, (C), sizeof((N)->n_path)); \
} while(0)
static void
namei_HandleToVolDir(namei_t * name, IHandle_t * ih)
{
lb64_string_t tmp;
namei_HandleToInodeDir(name, ih);
(void)int32_to_flipbase64(tmp, (int64_t) (ih->ih_vid & 0xff));
strlcpy(name->n_voldir1, tmp, sizeof(name->n_voldir1));
addtoname(name, name->n_voldir1);
(void)int32_to_flipbase64(tmp, (int64_t) ih->ih_vid);
strlcpy(name->n_voldir2, tmp, sizeof(name->n_voldir2));
addtoname(name, name->n_voldir2);
}
/* namei_HandleToName
*
* Constructs a file name for the fully qualified handle.
* Note that special files end up in /vicepX/InodeDir/Vxx/V*.data/special
*/
void
namei_HandleToName(namei_t * name, IHandle_t * ih)
{
lb64_string_t str;
int vno = (int)(ih->ih_ino & NAMEI_VNODEMASK);
namei_HandleToVolDir(name, ih);
if (vno == NAMEI_VNODESPECIAL) {
strlcpy(name->n_dir1, NAMEI_SPECDIR, sizeof(name->n_dir1));
addtoname(name, name->n_dir1);
name->n_dir2[0] = '\0';
} else {
(void)int32_to_flipbase64(str, VNO_DIR1(vno));
strlcpy(name->n_dir1, str, sizeof(name->n_dir1));
addtoname(name, name->n_dir1);
(void)int32_to_flipbase64(str, VNO_DIR2(vno));
strlcpy(name->n_dir2, str, sizeof(name->n_dir2));
addtoname(name, name->n_dir2);
}
(void)int64_to_flipbase64(str, (int64_t) ih->ih_ino);
strlcpy(name->n_inode, str, sizeof(name->n_inode));
addtoname(name, name->n_inode);
}
/* The following is a warning to tell sys-admins to not muck about in this
* name space.
*/
#define VICE_README "These files and directories are a part of the AFS \
namespace. Modifying them\nin any way will result in loss of AFS data,\n\
ownership and permissions included.\n"
int
namei_ViceREADME(char *partition)
{
char filename[32];
int fd;
/* Create the inode directory if we're starting for the first time */
(void)afs_snprintf(filename, sizeof filename, "%s/%s", partition,
INODEDIR);
mkdir(filename, 0700);
(void)afs_snprintf(filename, sizeof filename, "%s/%s/README", partition,
INODEDIR);
fd = afs_open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0444);
if (fd >= 0) {
(void)write(fd, VICE_README, strlen(VICE_README));
close(fd);
}
return (errno);
}
#define create_dir() \
do { \
if (mkdir(tmp, 0700)<0) { \
if (errno != EEXIST) \
return -1; \
} \
else { \
*created = 1; \
} \
} while (0)
#define create_nextdir(A) \
do { \
strcat(tmp, "/"); strcat(tmp, A); create_dir(); \
} while(0)
/* namei_CreateDataDirectories
*
* If creating the file failed because of ENOENT or ENOTDIR, try
* creating all the directories first.
*/
static int
namei_CreateDataDirectories(namei_t * name, int *created)
{
char tmp[256];
*created = 0;
strlcpy(tmp, name->n_base, sizeof(tmp));
create_dir();
create_nextdir(name->n_voldir1);
create_nextdir(name->n_voldir2);
create_nextdir(name->n_dir1);
if (name->n_dir2[0]) {
create_nextdir(name->n_dir2);
}
return 0;
}
/* delTree(): Deletes an entire tree of directories (no files)
* Input:
* root : Full path to the subtree. Should be big enough for PATH_MAX
* tree : the subtree to be deleted is rooted here. Specifies only the
* subtree beginning at tree (not the entire path). It should be
* a pointer into the "root" buffer.
* Output:
* errp : errno of the first error encountered during the directory cleanup.
* *errp should have been initialized to 0.
*
* Return Values:
* -1 : If errors were encountered during cleanup and error is set to
* the first errno.
* 0 : Success.
*
* If there are errors, we try to work around them and delete as many
* directories as possible. We don't attempt to remove directories that still
* have non-dir entries in them.
*/
static int
delTree(char *root, char *tree, int *errp)
{
char *cp;
DIR *ds;
struct dirent *dirp;
struct afs_stat st;
if (*tree) {
/* delete the children first */
cp = strchr(tree, '/');
if (cp) {
delTree(root, cp + 1, errp);
*cp = '\0';
} else
cp = tree + strlen(tree); /* move cp to the end of string tree */
/* now delete all entries in this dir */
if ((ds = opendir(root)) != (DIR *) NULL) {
errno = 0;
while ((dirp = readdir(ds))) {
/* ignore . and .. */
if (!strcmp(dirp->d_name, ".") || !strcmp(dirp->d_name, ".."))
continue;
/* since root is big enough, we reuse the space to
* concatenate the dirname to the current tree
*/
strcat(root, "/");
strcat(root, dirp->d_name);
if (afs_stat(root, &st) == 0 && S_ISDIR(st.st_mode)) {
/* delete this subtree */
delTree(root, cp + 1, errp);
} else
*errp = *errp ? *errp : errno;
/* recover path to our cur tree by truncating it to
* its original len
*/
*cp = 0;
}
/* if (!errno) -- closedir not implicit if we got an error */
closedir(ds);
}
/* finally axe the current dir */
if (rmdir(root))
*errp = *errp ? *errp : errno;
#ifndef AFS_PTHREAD_ENV /* let rx get some work done */
IOMGR_Poll();
#endif /* !AFS_PTHREAD_ENV */
}
/* if valid tree */
/* if we encountered errors during cleanup, we return a -1 */
if (*errp)
return -1;
return 0;
}
/* namei_RemoveDataDirectories
* Return Values:
* Returns 0 on success.
* Returns -1 on error. Typically, callers ignore this error bcause we
* can continue running if the removes fail. The salvage process will
* finish tidying up for us. We only use the n_base and n_voldir1 entries
* and only do rmdir's.
*/
static int
namei_RemoveDataDirectories(namei_t * name)
{
char pbuf[MAXPATHLEN], *path = pbuf;
int prefixlen = strlen(name->n_base), err = 0;
strlcpy(path, name->n_path, sizeof(pbuf));
/* move past the prefix */
path = path + prefixlen + 1; /* skip over the trailing / */
/* now delete all dirs upto path */
return delTree(pbuf, path, &err);
}
/* Create the file in the name space.
*
* Parameters stored as follows:
* Regular files:
* p1 - volid - implied in containing directory.
* p2 - vnode - name is <vno:31-23>/<vno:22-15>/<vno:15-0><uniq:31-5><tag:2-0>
* p3 - uniq -- bits 4-0 are in mode bits 4-0
* p4 - dv ---- dv:15-0 in uid, dv:29-16 in gid, dv:31-30 in mode:6-5
* Special files:
* p1 - volid - creation time - dwHighDateTime
* p2 - vnode - -1 means special, file goes in "S" subdirectory.
* p3 - type -- name is <type>.<tag> where tag is a file name unqiquifier.
* p4 - parid - parent volume id - implied in containing directory.
*
* Return value is the inode number or (Inode)-1 if error.
* We "know" there is only one link table, so return EEXIST if there already
* is a link table. It's up to the calling code to test errno and increment
* the link count.
*/
/* namei_MakeSpecIno
*
* This function is called by VCreateVolume to hide the implementation
* details of the inode numbers. This only allows for 7 volume special
* types, but if we get that far, this could should be dead by then.
*/
Inode
namei_MakeSpecIno(int volid, int type)
{
Inode ino;
ino = NAMEI_INODESPECIAL;
type &= NAMEI_TAGMASK;
ino |= ((Inode) type) << NAMEI_TAGSHIFT;
ino |= ((Inode) volid) << NAMEI_UNIQSHIFT;
return ino;
}
/* SetOGM - set owner group and mode bits from parm and tag
*
* owner - low 15 bits of parm.
* group - next 15 bits of parm.
* mode - 2 bits of parm, then lowest = 3 bits of tag.
*/
static int
SetOGM(int fd, int parm, int tag)
{
int owner, group, mode;
owner = parm & 0x7fff;
group = (parm >> 15) & 0x7fff;
if (fchown(fd, owner, group) < 0)
return -1;
mode = (parm >> 27) & 0x18;
mode |= tag & 0x7;
if (fchmod(fd, mode) < 0)
return -1;
return 0;
}
/* GetOGM - get parm and tag from owner, group and mode bits. */
static void
GetOGMFromStat(struct afs_stat *status, int *parm, int *tag)
{
*parm = status->st_uid | (status->st_gid << 15);
*parm |= (status->st_mode & 0x18) << 27;
*tag = status->st_mode & 0x7;
}
static int
GetOGM(int fd, int *parm, int *tag)
{
struct afs_stat status;
if (afs_fstat(fd, &status) < 0)
return -1;
GetOGMFromStat(&status, parm, tag);
return 0;
}
int big_vno = 0; /* Just in case we ever do 64 bit vnodes. */
/* Derive the name and create it O_EXCL. If that fails we have an error.
* Get the tag from a free column in the link table.
*/
Inode
namei_icreate(IHandle_t * lh, char *part, int p1, int p2, int p3, int p4)
{
namei_t name;
int fd = -1;
int code = 0;
int created_dir = 0;
IHandle_t tmp;
FdHandle_t *fdP;
FdHandle_t tfd;
int tag;
int ogm_parm;
memset((void *)&tmp, 0, sizeof(IHandle_t));
tmp.ih_dev = volutil_GetPartitionID(part);
if (tmp.ih_dev == -1) {
errno = EINVAL;
return -1;
}
if (p2 == -1) {
/* Parameters for special file:
* p1 - volume id - goes into owner/group/mode
* p2 - vnode == -1
* p3 - type
* p4 - parent volume id
*/
ogm_parm = p1;
tag = p3;
tmp.ih_vid = p4; /* Use parent volume id, where this file will be. */
tmp.ih_ino = namei_MakeSpecIno(p1, p3);
} else {
int vno = p2 & NAMEI_VNODEMASK;
/* Parameters for regular file:
* p1 - volume id
* p2 - vnode
* p3 - uniq
* p4 - dv
*/
if (vno != p2) {
big_vno++;
errno = EINVAL;
return -1;
}
/* If GetFreeTag succeeds, it atomically sets link count to 1. */
tag = GetFreeTag(lh, p2);
if (tag < 0)
goto bad;
/* name is <uniq(p3)><tag><vno(p2)> */
tmp.ih_vid = p1;
tmp.ih_ino = (Inode) p2;
tmp.ih_ino |= ((Inode) tag) << NAMEI_TAGSHIFT;
tmp.ih_ino |= ((Inode) p3) << NAMEI_UNIQSHIFT;
ogm_parm = p4;
}
namei_HandleToName(&name, &tmp);
fd = afs_open(name.n_path, O_CREAT | O_EXCL | O_TRUNC | O_RDWR, 0);
if (fd < 0) {
if (errno == ENOTDIR || errno == ENOENT) {
if (namei_CreateDataDirectories(&name, &created_dir) < 0)
goto bad;
fd = afs_open(name.n_path, O_CREAT | O_EXCL | O_TRUNC | O_RDWR,
0);
if (fd < 0)
goto bad;
} else {
goto bad;
}
}
if (SetOGM(fd, ogm_parm, tag) < 0) {
close(fd);
fd = -1;
goto bad;
}
if (p2 == -1 && p3 == VI_LINKTABLE) {
/* hack at tmp to setup for set link count call. */
memset((void *)&tfd, 0, sizeof(FdHandle_t)); /* minimalistic still, but a little cleaner */
tfd.fd_ih = &tmp;
tfd.fd_fd = fd;
code = namei_SetLinkCount(&tfd, (Inode) 0, 1, 0);
}
bad:
if (fd >= 0)
close(fd);
if (code || (fd < 0)) {
if (p2 != -1) {
fdP = IH_OPEN(lh);
if (fdP) {
namei_SetLinkCount(fdP, tmp.ih_ino, 0, 0);
FDH_CLOSE(fdP);
}
}
}
return (code || (fd < 0)) ? (Inode) - 1 : tmp.ih_ino;
}
/* namei_iopen */
int
namei_iopen(IHandle_t * h)
{
int fd;
namei_t name;
/* Convert handle to file name. */
namei_HandleToName(&name, h);
fd = afs_open(name.n_path, O_RDWR, 0666);
return fd;
}
/* Need to detect vol special file and just unlink. In those cases, the
* handle passed in _is_ for the inode. We only check p1 for the special
* files.
*/
int
namei_dec(IHandle_t * ih, Inode ino, int p1)
{
int count = 0;
namei_t name;
int code = 0;
FdHandle_t *fdP;
if ((ino & NAMEI_INODESPECIAL) == NAMEI_INODESPECIAL) {
IHandle_t *tmp;
int inode_p1, tag;
int type = (int)((ino >> NAMEI_TAGSHIFT) & NAMEI_TAGMASK);
/* Verify this is the right file. */
IH_INIT(tmp, ih->ih_dev, ih->ih_vid, ino);
fdP = IH_OPEN(tmp);
if (fdP == NULL) {
IH_RELEASE(tmp);
errno = EINVAL;
return -1;
}
if ((GetOGM(fdP->fd_fd, &inode_p1, &tag) < 0) || (inode_p1 != p1)) {
FDH_REALLYCLOSE(fdP);
IH_RELEASE(tmp);
errno = EINVAL;
return -1;
}
/* If it's the link table itself, decrement the link count. */
if (type == VI_LINKTABLE) {
if ((count = namei_GetLinkCount(fdP, (Inode) 0, 1)) < 0) {
FDH_REALLYCLOSE(fdP);
IH_RELEASE(tmp);
return -1;
}
count--;
if (namei_SetLinkCount(fdP, (Inode) 0, count < 0 ? 0 : count, 1) <
0) {
FDH_REALLYCLOSE(fdP);
IH_RELEASE(tmp);
return -1;
}
if (count > 0) {
FDH_REALLYCLOSE(fdP);
IH_RELEASE(tmp);
return 0;
}
}
namei_HandleToName(&name, tmp);
if ((code = unlink(name.n_path)) == 0) {
if (type == VI_LINKTABLE) {
/* Try to remove directory. If it fails, that's ok.
* Salvage will clean up.
*/
(void)namei_RemoveDataDirectories(&name);
}
}
FDH_REALLYCLOSE(fdP);
IH_RELEASE(tmp);
} else {
/* Get a file descriptor handle for this Inode */
fdP = IH_OPEN(ih);
if (fdP == NULL) {
return -1;
}
if ((count = namei_GetLinkCount(fdP, ino, 1)) < 0) {
FDH_REALLYCLOSE(fdP);
return -1;
}
count--;
if (count >= 0) {
if (namei_SetLinkCount(fdP, ino, count, 1) < 0) {
FDH_REALLYCLOSE(fdP);
return -1;
}
} else {
IHandle_t *th;
IH_INIT(th, ih->ih_dev, ih->ih_vid, ino);
Log("Warning: Lost ref on ihandle dev %d vid %d ino %" AFS_INT64_FMT "\n",
th->ih_dev, th->ih_vid, (int64_t) th->ih_ino);
IH_RELEASE(th);
/* If we're less than 0, someone presumably unlinked;
don't bother setting count to 0, but we need to drop a lock */
if (namei_SetLinkCount(fdP, ino, 0, 1) < 0) {
FDH_REALLYCLOSE(fdP);
return -1;
}
}
if (count == 0) {
IHandle_t *th;
IH_INIT(th, ih->ih_dev, ih->ih_vid, ino);
namei_HandleToName(&name, th);
IH_RELEASE(th);
code = unlink(name.n_path);
}
FDH_CLOSE(fdP);
}
return code;
}
int
namei_inc(IHandle_t * h, Inode ino, int p1)
{
int count;
int code = 0;
FdHandle_t *fdP;
if ((ino & NAMEI_INODESPECIAL) == NAMEI_INODESPECIAL) {
int type = (int)((ino >> NAMEI_TAGSHIFT) & NAMEI_TAGMASK);
if (type != VI_LINKTABLE)
return 0;
ino = (Inode) 0;
}
/* Get a file descriptor handle for this Inode */
fdP = IH_OPEN(h);
if (fdP == NULL) {
return -1;
}
if ((count = namei_GetLinkCount(fdP, ino, 1)) < 0)
code = -1;
else {
count++;
if (count > 7) {
errno = EINVAL;
code = -1;
count = 7;
}
if (namei_SetLinkCount(fdP, ino, count, 1) < 0)
code = -1;
}
if (code) {
FDH_REALLYCLOSE(fdP);
} else {
FDH_CLOSE(fdP);
}
return code;
}
int
namei_replace_file_by_hardlink(IHandle_t *hLink, IHandle_t *hTarget)
{
afs_int32 code;
namei_t nameLink;
namei_t nameTarget;
/* Convert handle to file name. */
namei_HandleToName(&nameLink, hLink);
namei_HandleToName(&nameTarget, hTarget);
unlink(nameLink.n_path);
code = link(nameTarget.n_path, nameLink.n_path);
return code;
}
int
namei_copy_on_write(IHandle_t *h)
{
afs_int32 fd, code = 0;
namei_t name;
FdHandle_t *fdP;
struct afs_stat tstat;
namei_HandleToName(&name, h);
if (afs_stat(name.n_path, &tstat) < 0)
return EIO;
if (tstat.st_nlink > 1) { /* do a copy on write */
char path[259];
char *buf;
afs_size_t size;
afs_int32 tlen;
fdP = IH_OPEN(h);
if (!fdP)
return EIO;
afs_snprintf(path, sizeof(path), "%s-tmp", name.n_path);
fd = afs_open(path, O_CREAT | O_EXCL | O_TRUNC | O_RDWR, 0);
if (fd < 0) {
FDH_CLOSE(fdP);
return EIO;
}
buf = malloc(8192);
if (!buf) {
close(fd);
unlink(path);
FDH_CLOSE(fdP);
return ENOMEM;
}
size = tstat.st_size;
FDH_SEEK(fdP, 0, 0);
while (size) {
tlen = size > 8192 ? 8192 : size;
if (FDH_READ(fdP, buf, tlen) != tlen)
break;
if (write(fd, buf, tlen) != tlen)
break;
size -= tlen;
}
close(fd);
FDH_REALLYCLOSE(fdP);
free(buf);
if (size)
code = EIO;
else {
unlink(name.n_path);
code = rename(path, name.n_path);
}
}
return code;
}
/************************************************************************
* File Name Structure
************************************************************************
*
* Each AFS file needs a unique name and it needs to be findable with
* minimal lookup time. Note that the constraint on the number of files and
* directories in a volume is the size of the vnode index files and the
* max file size AFS supports (for internal files) of 2^31. Since a record
* in the small vnode index file is 64 bytes long, we can have at most
* (2^31)/64 or 33554432 files. A record in the large index file is
* 256 bytes long, giving a maximum of (2^31)/256 = 8388608 directories.
* Another layout parameter is that there is roughly a 16 to 1 ratio between
* the number of files and the number of directories.
*
* Using this information we can see that a layout of 256 directories, each
* with 512 subdirectories and each of those having 512 files gives us
* 256*512*512 = 67108864 AFS files and directories.
*
* The volume, vnode, uniquifier and data version, as well as the tag
* are required, either for finding the file or for salvaging. It's best to
* restrict the name to something that can be mapped into 64 bits so the
* "Inode" is easily comparable (using "==") to other "Inodes". The tag
* is used to distinguish between different versions of the same file
* which are currently in the RW and clones of a volume. See "Link Table
* Organization" below for more information on the tag. The tag is
* required in the name of the file to ensure a unique name.
*
* We can store data in the uid, gid and mode bits of the files, provided
* the directories have root only access. This gives us 15 bits for each
* of uid and gid (GNU chown considers 65535 to mean "don't change").
* There are 9 available mode bits. Adn we need to store a total of
* 32 (volume id) + 26 (vnode) + 32 (uniquifier) + 32 (data-version) + 3 (tag)
* or 131 bits somewhere.
*
* The format of a file name for a regular file is:
* /vicepX/AFSIDat/V1/V2/AA/BB/<tag><uniq><vno>
* V1 - low 8 bits of RW volume id
* V2 - all bits of RW volume id
* AA - high 8 bits of vnode number.
* BB - next 9 bits of vnode number.
* <tag><uniq><vno> - file name
*
* Volume special files are stored in a separate directory:
* /vicepX/AFSIDat/V1/V2/special/<tag><uniq><vno>
*
*
* The vnode is hashed into the directory using the high bits of the
* vnode number. This is so that consecutively created vnodes are in
* roughly the same area on the disk. This will at least be optimal if
* the user is creating many files in the same AFS directory. The name
* should be formed so that the leading characters are different as quickly
* as possible, leading to faster discards of incorrect matches in the
* lookup code.
*
*/
/************************************************************************
* Link Table Organization
************************************************************************
*
* The link table volume special file is used to hold the link counts that
* are held in the inodes in inode based AFS vice filesystems. For user
* space access, the link counts are being kept in a separate
* volume special file. The file begins with the usual version stamp
* information and is then followed by one row per vnode number. vnode 0
* is used to hold the link count of the link table itself. That is because
* the same link table is shared among all the volumes of the volume group
* and is deleted only when the last volume of a volume group is deleted.
*
* Within each row, the columns are 3 bits wide. They can each hold a 0 based
* link count from 0 through 7. Each colume represents a unique instance of
* that vnode. Say we have a file shared between the RW and a RO and a
* different version of the file (or a different uniquifer) for the BU volume.
* Then one column would be holding the link count of 2 for the RW and RO
* and a different column would hold the link count of 1 for the BU volume.
* Note that we allow only 5 volumes per file, giving 15 bits used in the
* short.
*/
#define LINKTABLE_WIDTH 2
#define LINKTABLE_SHIFT 1 /* log 2 = 1 */
static void
namei_GetLCOffsetAndIndexFromIno(Inode ino, afs_foff_t * offset, int *index)
{
int toff = (int)(ino & NAMEI_VNODEMASK);
int tindex = (int)((ino >> NAMEI_TAGSHIFT) & NAMEI_TAGMASK);
*offset = (afs_foff_t) ((toff << LINKTABLE_SHIFT) + 8); /* * 2 + sizeof stamp */
*index = (tindex << 1) + tindex;
}
/* namei_GetLinkCount
* If lockit is set, lock the file and leave it locked upon a successful
* return.
*/
static int
namei_GetLinkCount2(FdHandle_t * h, Inode ino, int lockit, int fixup, int nowrite)
{
unsigned short row = 0;
afs_foff_t offset;
ssize_t rc;
int index;
/* there's no linktable yet. the salvager will create one later */
if (h->fd_fd == -1 && fixup)
return 1;
namei_GetLCOffsetAndIndexFromIno(ino, &offset, &index);
if (lockit) {
if (flock(h->fd_fd, LOCK_EX) < 0)
return -1;
}
if (afs_lseek(h->fd_fd, offset, SEEK_SET) == -1)
goto bad_getLinkByte;
rc = read(h->fd_fd, (char *)&row, sizeof(row));
if ((rc == 0 || !((row >> index) & NAMEI_TAGMASK)) && fixup && nowrite)
return 1;
if (rc == 0 && fixup) {
struct stat st;
if (fstat(h->fd_fd, &st) || st.st_size >= offset+sizeof(row))
goto bad_getLinkByte;
FDH_TRUNC(h, offset+sizeof(row));
row = 1 << index;
rc = write(h->fd_fd, (char *)&row, sizeof(row));
}
if (rc != sizeof(row)) {
goto bad_getLinkByte;
}
if (fixup && !((row >> index) & NAMEI_TAGMASK)) {
row |= 1<<index;
if (afs_lseek(h->fd_fd, offset, SEEK_SET) == -1)
goto bad_getLinkByte;
rc = write(h->fd_fd, (char *)&row, sizeof(row));
if (rc != sizeof(row))
goto bad_getLinkByte;
}
return (int)((row >> index) & NAMEI_TAGMASK);
bad_getLinkByte:
if (lockit)
flock(h->fd_fd, LOCK_UN);
return -1;
}
int
namei_GetLinkCount(FdHandle_t * h, Inode ino, int lockit)
{
return namei_GetLinkCount2(h, ino, lockit, 0, 1);
}
/* Return a free column index for this vnode. */
static int
GetFreeTag(IHandle_t * ih, int vno)
{
FdHandle_t *fdP;
afs_foff_t offset;
int col;
int coldata;
short row;
int code;
fdP = IH_OPEN(ih);
if (fdP == NULL)
return -1;
/* Only one manipulates at a time. */
if (flock(fdP->fd_fd, LOCK_EX) < 0) {
FDH_REALLYCLOSE(fdP);
return -1;
}
offset = (vno << LINKTABLE_SHIFT) + 8; /* * 2 + sizeof stamp */
if (afs_lseek(fdP->fd_fd, offset, SEEK_SET) == -1) {
goto badGetFreeTag;
}
code = read(fdP->fd_fd, (char *)&row, sizeof(row));
if (code != sizeof(row)) {
if (code != 0)
goto badGetFreeTag;
row = 0;
}
/* Now find a free column in this row and claim it. */
for (col = 0; col < NAMEI_MAXVOLS; col++) {
coldata = 7 << (col * 3);
if ((row & coldata) == 0)
break;
}
if (col >= NAMEI_MAXVOLS) {
errno = ENOSPC;
goto badGetFreeTag;
}
coldata = 1 << (col * 3);
row |= coldata;
if (afs_lseek(fdP->fd_fd, offset, SEEK_SET) == -1) {
goto badGetFreeTag;
}
if (write(fdP->fd_fd, (char *)&row, sizeof(row)) != sizeof(row)) {
goto badGetFreeTag;
}
FDH_SYNC(fdP);
flock(fdP->fd_fd, LOCK_UN);
FDH_REALLYCLOSE(fdP);
return col;;
badGetFreeTag:
flock(fdP->fd_fd, LOCK_UN);
FDH_REALLYCLOSE(fdP);
return -1;
}
/* namei_SetLinkCount
* If locked is set, assume file is locked. Otherwise, lock file before
* proceeding to modify it.
*/
int
namei_SetLinkCount(FdHandle_t * fdP, Inode ino, int count, int locked)
{
afs_foff_t offset;
int index;
unsigned short row;
int junk;
int code = -1;
namei_GetLCOffsetAndIndexFromIno(ino, &offset, &index);
if (!locked) {
if (flock(fdP->fd_fd, LOCK_EX) < 0) {
return -1;
}
}
if (afs_lseek(fdP->fd_fd, offset, SEEK_SET) == -1) {
errno = EBADF;
goto bad_SetLinkCount;
}
code = read(fdP->fd_fd, (char *)&row, sizeof(row));
if (code != sizeof(row)) {
if (code != 0) {
errno = EBADF;
goto bad_SetLinkCount;
}
row = 0;
}
junk = 7 << index;
count <<= index;
row &= (unsigned short)~junk;
row |= (unsigned short)count;
if (afs_lseek(fdP->fd_fd, offset, SEEK_SET) == -1) {
errno = EBADF;
goto bad_SetLinkCount;
}
if (write(fdP->fd_fd, (char *)&row, sizeof(short)) != sizeof(short)) {
errno = EBADF;
goto bad_SetLinkCount;
}
FDH_SYNC(fdP);
code = 0;
bad_SetLinkCount:
flock(fdP->fd_fd, LOCK_UN);
return code;
}
/* ListViceInodes - write inode data to a results file. */
static int DecodeInode(char *dpath, char *name, struct ViceInodeInfo *info,
unsigned int volid);
static int DecodeVolumeName(char *name, unsigned int *vid);
static int namei_ListAFSSubDirs(IHandle_t * dirIH,
int (*write_fun) (FILE *,
struct ViceInodeInfo *,
char *, char *), FILE * fp,
int (*judgeFun) (struct ViceInodeInfo *,
afs_uint32 vid, void *),
afs_uint32 singleVolumeNumber, void *rock);
/* WriteInodeInfo
*
* Write the inode data to the results file.
*
* Returns -2 on error, 0 on success.
*
* This is written as a callback simply so that other listing routines
* can use the same inode reading code.
*/
static int
WriteInodeInfo(FILE * fp, struct ViceInodeInfo *info, char *dir, char *name)
{
int n;
n = fwrite(info, sizeof(*info), 1, fp);
return (n == 1) ? 0 : -2;
}
int mode_errors; /* Number of errors found in mode bits on directories. */
void
VerifyDirPerms(char *path)
{
struct afs_stat status;
if (afs_stat(path, &status) < 0) {
Log("Unable to stat %s. Please manually verify mode bits for this"
" directory\n", path);
} else {
if (((status.st_mode & 0777) != 0700) || (status.st_uid != 0))
mode_errors++;
}
}
/* ListViceInodes
* Fill the results file with the requested inode information.
*
* Return values:
* 0 - success
* -1 - complete failure, salvage should terminate.
* -2 - not enough space on partition, salvager has error message for this.
*
* This code optimizes single volume salvages by just looking at that one
* volume's directory.
*
* If the resultFile is NULL, then don't call the write routine.
*/
int
ListViceInodes(char *devname, char *mountedOn, char *resultFile,
int (*judgeInode) (struct ViceInodeInfo * info, afs_uint32 vid, void *rock),
afs_uint32 singleVolumeNumber, int *forcep, int forceR, char *wpath,
void *rock)
{
FILE *fp = (FILE *) - 1;
int ninodes;
struct afs_stat status;
*forcep = 0; /* no need to salvage until further notice */
if (resultFile) {
fp = afs_fopen(resultFile, "w");
if (!fp) {
Log("Unable to create inode description file %s\n", resultFile);
return -1;
}
}
/* Verify protections on directories. */
mode_errors = 0;
VerifyDirPerms(mountedOn);
ninodes =
namei_ListAFSFiles(mountedOn, WriteInodeInfo, fp, judgeInode,
singleVolumeNumber, rock);
if (!resultFile)
return ninodes;
if (ninodes < 0) {
fclose(fp);
return ninodes;
}
if (fflush(fp) == EOF) {
Log("Unable to successfully flush inode file for %s\n", mountedOn);
fclose(fp);
return -2;
}
if (fsync(fileno(fp)) == -1) {
Log("Unable to successfully fsync inode file for %s\n", mountedOn);
fclose(fp);
return -2;
}
if (fclose(fp) == EOF) {
Log("Unable to successfully close inode file for %s\n", mountedOn);
return -2;
}
/*
* Paranoia: check that the file is really the right size
*/
if (afs_stat(resultFile, &status) == -1) {
Log("Unable to successfully stat inode file for %s\n", mountedOn);
return -2;
}
if (status.st_size != ninodes * sizeof(struct ViceInodeInfo)) {
Log("Wrong size (%d instead of %d) in inode file for %s\n",
status.st_size, ninodes * sizeof(struct ViceInodeInfo),
mountedOn);
return -2;
}
return 0;
}
/* namei_ListAFSFiles
*
* Collect all the matching AFS files on the drive.
* If singleVolumeNumber is non-zero, just return files for that volume.
*
* Returns <0 on error, else number of files found to match.
*/
int
namei_ListAFSFiles(char *dev,
int (*writeFun) (FILE *, struct ViceInodeInfo *, char *,
char *), FILE * fp,
int (*judgeFun) (struct ViceInodeInfo *, afs_uint32, void *),
afs_uint32 singleVolumeNumber, void *rock)
{
IHandle_t ih;
namei_t name;
int ninodes = 0;
DIR *dirp1, *dirp2;
struct dirent *dp1, *dp2;
char path2[512];
#ifdef DELETE_ZLC
static void FreeZLCList(void);
#endif
memset((void *)&ih, 0, sizeof(IHandle_t));
ih.ih_dev = volutil_GetPartitionID(dev);
if (singleVolumeNumber) {
ih.ih_vid = singleVolumeNumber;
namei_HandleToVolDir(&name, &ih);
ninodes =
namei_ListAFSSubDirs(&ih, writeFun, fp, judgeFun,
singleVolumeNumber, rock);
if (ninodes < 0)
return ninodes;
} else {
/* Find all volume data directories and descend through them. */
namei_HandleToInodeDir(&name, &ih);
ninodes = 0;
dirp1 = opendir(name.n_path);
if (!dirp1)
return 0;
while ((dp1 = readdir(dirp1))) {
if (*dp1->d_name == '.')
continue;
afs_snprintf(path2, sizeof(path2), "%s/%s", name.n_path,
dp1->d_name);
dirp2 = opendir(path2);
if (dirp2) {
while ((dp2 = readdir(dirp2))) {
if (*dp2->d_name == '.')
continue;
if (!DecodeVolumeName(dp2->d_name, &ih.ih_vid)) {
ninodes +=
namei_ListAFSSubDirs(&ih, writeFun, fp, judgeFun,
0, rock);
}
}
closedir(dirp2);
}
}
closedir(dirp1);
}
#ifdef DELETE_ZLC
FreeZLCList();
#endif
return ninodes;
}
/* namei_ListAFSSubDirs
*
*
* Return values:
* < 0 - an error
* > = 0 - number of AFS files found.
*/
static int
namei_ListAFSSubDirs(IHandle_t * dirIH,
int (*writeFun) (FILE *, struct ViceInodeInfo *, char *,
char *), FILE * fp,
int (*judgeFun) (struct ViceInodeInfo *, afs_uint32, void *),
afs_uint32 singleVolumeNumber, void *rock)
{
IHandle_t myIH = *dirIH;
namei_t name;
char path1[512], path2[512], path3[512];
DIR *dirp1, *dirp2, *dirp3;
struct dirent *dp1, *dp2, *dp3;
struct ViceInodeInfo info;
FdHandle_t linkHandle;
int ninodes = 0;
#ifdef DELETE_ZLC
int i;
static void AddToZLCDeleteList(char dir, char *name);
static void DeleteZLCFiles(char *path);
#endif
namei_HandleToVolDir(&name, &myIH);
strlcpy(path1, name.n_path, sizeof(path1));
/* Do the directory containing the special files first to pick up link
* counts.
*/
(void)strcat(path1, "/");
(void)strcat(path1, NAMEI_SPECDIR);
linkHandle.fd_fd = -1;
dirp1 = opendir(path1);
if (dirp1) {
while ((dp1 = readdir(dirp1))) {
if (*dp1->d_name == '.')
continue;
if (DecodeInode(path1, dp1->d_name, &info, myIH.ih_vid) < 0)
continue;
if (info.u.param[2] != VI_LINKTABLE) {
info.linkCount = 1;
} else {
/* Open this handle */
(void)afs_snprintf(path2, sizeof path2, "%s/%s", path1,
dp1->d_name);
linkHandle.fd_fd = afs_open(path2, Testing ? O_RDONLY : O_RDWR, 0666);
info.linkCount =
namei_GetLinkCount2(&linkHandle, (Inode) 0, 1, 1, Testing);
}
if (judgeFun && !(*judgeFun) (&info, singleVolumeNumber, rock))
continue;
if ((*writeFun) (fp, &info, path1, dp1->d_name) < 0) {
if (linkHandle.fd_fd >= 0)
close(linkHandle.fd_fd);
closedir(dirp1);
return -1;
}
ninodes++;
}
closedir(dirp1);
}
/* Now run through all the other subdirs */
namei_HandleToVolDir(&name, &myIH);
strlcpy(path1, name.n_path, sizeof(path1));
dirp1 = opendir(path1);
if (dirp1) {
while ((dp1 = readdir(dirp1))) {
if (*dp1->d_name == '.')
continue;
if (!strcmp(dp1->d_name, NAMEI_SPECDIR))
continue;
/* Now we've got a next level subdir. */
afs_snprintf(path2, sizeof(path2), "%s/%s", path1, dp1->d_name);
dirp2 = opendir(path2);
if (dirp2) {
while ((dp2 = readdir(dirp2))) {
if (*dp2->d_name == '.')
continue;
/* Now we've got to the actual data */
afs_snprintf(path3, sizeof(path3), "%s/%s", path2,
dp2->d_name);
dirp3 = opendir(path3);
if (dirp3) {
while ((dp3 = readdir(dirp3))) {
if (*dp3->d_name == '.')
continue;
if (DecodeInode
(path3, dp3->d_name, &info, myIH.ih_vid) < 0)
continue;
info.linkCount =
namei_GetLinkCount2(&linkHandle,
info.inodeNumber, 1, 1, Testing);
if (info.linkCount == 0) {
#ifdef DELETE_ZLC
Log("Found 0 link count file %s/%s, deleting it.\n", path3, dp3->d_name);
AddToZLCDeleteList((char)i, dp3->d_name);
#else
Log("Found 0 link count file %s/%s.\n", path3,
dp3->d_name);
#endif
continue;
}
if (judgeFun
&& !(*judgeFun) (&info, singleVolumeNumber, rock))
continue;
if ((*writeFun) (fp, &info, path3, dp3->d_name) <
0) {
close(linkHandle.fd_fd);
closedir(dirp3);
closedir(dirp2);
closedir(dirp1);
return -1;
}
ninodes++;
}
closedir(dirp3);
}
}
closedir(dirp2);
}
}
closedir(dirp1);
}
if (linkHandle.fd_fd >= 0)
close(linkHandle.fd_fd);
if (!ninodes) {
/* Then why does this directory exist? Blow it away. */
namei_HandleToVolDir(&name, dirIH);
namei_RemoveDataDirectories(&name);
}
return ninodes;
}
static int
DecodeVolumeName(char *name, unsigned int *vid)
{
if (strlen(name) <= 2)
return -1;
*vid = (unsigned int)flipbase64_to_int64(name);
return 0;
}
/* DecodeInode
*
* Get the inode number from the name.
* Get
*/
static int
DecodeInode(char *dpath, char *name, struct ViceInodeInfo *info,
unsigned int volid)
{
char fpath[512];
struct afs_stat status;
int parm, tag;
lb64_string_t check;
afs_snprintf(fpath, sizeof(fpath), "%s/%s", dpath, name);
if (afs_stat(fpath, &status) < 0) {
return -1;
}
info->byteCount = status.st_size;
info->inodeNumber = (Inode) flipbase64_to_int64(name);
int64_to_flipbase64(check, info->inodeNumber);
if (strcmp(name, check))
return -1;
GetOGMFromStat(&status, &parm, &tag);
if ((info->inodeNumber & NAMEI_INODESPECIAL) == NAMEI_INODESPECIAL) {
/* p1 - vid, p2 - -1, p3 - type, p4 - rwvid */
info->u.param[0] = parm;
info->u.param[1] = -1;
info->u.param[2] = tag;
info->u.param[3] = volid;
} else {
/* p1 - vid, p2 - vno, p3 - uniq, p4 - dv */
info->u.param[0] = volid;
info->u.param[1] = (int)(info->inodeNumber & NAMEI_VNODEMASK);
info->u.param[2] = (int)((info->inodeNumber >> NAMEI_UNIQSHIFT)
& (Inode) NAMEI_UNIQMASK);
info->u.param[3] = parm;
}
return 0;
}
/*
* Convert the VolumeInfo file from RO to RW
* this routine is called by namei_convertROtoRWvolume()
*/
#ifdef FSSYNC_BUILD_CLIENT
static afs_int32
convertVolumeInfo(int fdr, int fdw, afs_uint32 vid)
{
struct VolumeDiskData vd;
char *p;
if (read(fdr, &vd, sizeof(struct VolumeDiskData)) !=
sizeof(struct VolumeDiskData)) {
Log("1 convertVolumeInfo: read failed for %lu with code %d\n", vid,
errno);
return -1;
}
vd.restoredFromId = vd.id; /* remember the RO volume here */
vd.cloneId = vd.id;
vd.id = vd.parentId;
vd.type = RWVOL;
vd.dontSalvage = 0;
vd.inUse = 0;
vd.uniquifier += 5000; /* just in case there are still file copies from
* the old RW volume around */
p = strrchr(vd.name, '.');
if (p && !strcmp(p, ".readonly")) {
memset(p, 0, 9);
}
if (write(fdw, &vd, sizeof(struct VolumeDiskData)) !=
sizeof(struct VolumeDiskData)) {
Log("1 convertVolumeInfo: write failed for %lu with code %d\n", vid,
errno);
return -1;
}
return 0;
}
#endif
/*
* Convert a RO-volume into a RW-volume
*
* This function allows to recover very fast from the loss of a partition
* from RO-copies if all RO-Copies exist on another partition.
* Then these RO-volumes can be made to the new RW-volumes.
* Backup of RW-volumes then consists in "vos release".
*
* We must make sure in this partition exists only the RO-volume which
* is typical for remote replicas.
*
* Then the linktable is already ok,
* the vnode files need to be renamed
* the volinfo file needs to be replaced by another one with
* slightly different contents and new name.
* The volume header file of the RO-volume in the /vicep<x> directory
* is destroyed by this call. A new header file for the RW-volume must
* be created after return from this routine.
*/
int
namei_ConvertROtoRWvolume(char *pname, afs_uint32 volumeId)
{
#ifdef FSSYNC_BUILD_CLIENT
namei_t n;
char dir_name[512], oldpath[512], newpath[512];
char smallName[64];
char largeName[64];
char infoName[64];
IHandle_t t_ih;
IHandle_t *ih;
char infoSeen = 0;
char smallSeen = 0;
char largeSeen = 0;
char linkSeen = 0;
int code, fd, fd2;
char *p;
DIR *dirp;
Inode ino;
struct dirent *dp;
struct DiskPartition64 *partP;
struct ViceInodeInfo info;
struct VolumeDiskHeader h;
char headername[16];
(void)afs_snprintf(headername, sizeof headername, VFORMAT, afs_printable_uint32_lu(volumeId));
(void)afs_snprintf(oldpath, sizeof oldpath, "%s/%s", pname, headername);
fd = open(oldpath, O_RDONLY);
if (fd < 0) {
Log("1 namei_ConvertROtoRWvolume: Couldn't open header for RO-volume %lu.\n", volumeId);
return ENOENT;
}
if (read(fd, &h, sizeof(h)) != sizeof(h)) {
Log("1 namei_ConvertROtoRWvolume: Couldn't read header for RO-volume %lu.\n", volumeId);
close(fd);
return EIO;
}
close(fd);
FSYNC_VolOp(volumeId, pname, FSYNC_VOL_BREAKCBKS, 0, NULL);
for (partP = DiskPartitionList; partP && strcmp(partP->name, pname);
partP = partP->next);
if (!partP) {
Log("1 namei_ConvertROtoRWvolume: Couldn't find DiskPartition for %s\n", pname);
return EIO;
}
ino = namei_MakeSpecIno(h.parent, VI_LINKTABLE);
IH_INIT(ih, partP->device, h.parent, ino);
namei_HandleToName(&n, ih);
strlcpy(dir_name, n.n_path, sizeof(dir_name));
p = strrchr(dir_name, '/');
*p = 0;
dirp = opendir(dir_name);
if (!dirp) {
Log("1 namei_ConvertROtoRWvolume: Could not opendir(%s)\n", dir_name);
return EIO;
}
while ((dp = readdir(dirp))) {
/* struct ViceInodeInfo info; */
if (*dp->d_name == '.')
continue;
if (DecodeInode(dir_name, dp->d_name, &info, ih->ih_vid) < 0) {
Log("1 namei_ConvertROtoRWvolume: DecodeInode failed for %s/%s\n",
dir_name, dp->d_name);
closedir(dirp);
return -1;
}
if (info.u.param[1] != -1) {
Log("1 namei_ConvertROtoRWvolume: found other than volume special file %s/%s\n", dir_name, dp->d_name);
closedir(dirp);
return -1;
}
if (info.u.param[0] != volumeId) {
if (info.u.param[0] == ih->ih_vid) {
if (info.u.param[2] == VI_LINKTABLE) { /* link table */
linkSeen = 1;
continue;
}
}
Log("1 namei_ConvertROtoRWvolume: found special file %s/%s for volume %lu\n", dir_name, dp->d_name, info.u.param[0]);
closedir(dirp);
return VVOLEXISTS;
}
if (info.u.param[2] == VI_VOLINFO) { /* volume info file */
strlcpy(infoName, dp->d_name, sizeof(infoName));
infoSeen = 1;
} else if (info.u.param[2] == VI_SMALLINDEX) { /* small vnodes file */
strlcpy(smallName, dp->d_name, sizeof(smallName));
smallSeen = 1;
} else if (info.u.param[2] == VI_LARGEINDEX) { /* large vnodes file */
strlcpy(largeName, dp->d_name, sizeof(largeName));
largeSeen = 1;
} else {
closedir(dirp);
Log("1 namei_ConvertROtoRWvolume: unknown type %d of special file found : %s/%s\n", info.u.param[2], dir_name, dp->d_name);
return -1;
}
}
closedir(dirp);
if (!infoSeen || !smallSeen || !largeSeen || !linkSeen) {
Log("1 namei_ConvertROtoRWvolume: not all special files found in %s\n", dir_name);
return -1;
}
/*
* If we come here then there was only a RO-volume and we can safely
* proceed.
*/
memset(&t_ih, 0, sizeof(t_ih));
t_ih.ih_dev = ih->ih_dev;
t_ih.ih_vid = ih->ih_vid;
(void)afs_snprintf(oldpath, sizeof oldpath, "%s/%s", dir_name, infoName);
fd = afs_open(oldpath, O_RDWR, 0);
if (fd < 0) {
Log("1 namei_ConvertROtoRWvolume: could not open RO info file: %s\n",
oldpath);
return -1;
}
t_ih.ih_ino = namei_MakeSpecIno(ih->ih_vid, VI_VOLINFO);
namei_HandleToName(&n, &t_ih);
fd2 = afs_open(n.n_path, O_CREAT | O_EXCL | O_TRUNC | O_RDWR, 0);
if (fd2 < 0) {
Log("1 namei_ConvertROtoRWvolume: could not create RW info file: %s\n", n.n_path);
close(fd);
return -1;
}
code = convertVolumeInfo(fd, fd2, ih->ih_vid);
close(fd);
if (code) {
close(fd2);
unlink(n.n_path);
return -1;
}
SetOGM(fd2, ih->ih_vid, 1);
close(fd2);
t_ih.ih_ino = namei_MakeSpecIno(ih->ih_vid, VI_SMALLINDEX);
namei_HandleToName(&n, &t_ih);
(void)afs_snprintf(newpath, sizeof newpath, "%s/%s", dir_name, smallName);
fd = afs_open(newpath, O_RDWR, 0);
if (fd < 0) {
Log("1 namei_ConvertROtoRWvolume: could not open SmallIndex file: %s\n", newpath);
return -1;
}
SetOGM(fd, ih->ih_vid, 2);
close(fd);
link(newpath, n.n_path);
unlink(newpath);
t_ih.ih_ino = namei_MakeSpecIno(ih->ih_vid, VI_LARGEINDEX);
namei_HandleToName(&n, &t_ih);
(void)afs_snprintf(newpath, sizeof newpath, "%s/%s", dir_name, largeName);
fd = afs_open(newpath, O_RDWR, 0);
if (fd < 0) {
Log("1 namei_ConvertROtoRWvolume: could not open LargeIndex file: %s\n", newpath);
return -1;
}
SetOGM(fd, ih->ih_vid, 3);
close(fd);
link(newpath, n.n_path);
unlink(newpath);
unlink(oldpath);
h.id = h.parent;
h.volumeInfo_hi = h.id;
h.smallVnodeIndex_hi = h.id;
h.largeVnodeIndex_hi = h.id;
h.linkTable_hi = h.id;
(void)afs_snprintf(headername, sizeof headername, VFORMAT, afs_printable_uint32_lu(h.id));
(void)afs_snprintf(newpath, sizeof newpath, "%s/%s", pname, headername);
fd = open(newpath, O_CREAT | O_EXCL | O_RDWR, 0644);
if (fd < 0) {
Log("1 namei_ConvertROtoRWvolume: Couldn't create header for RW-volume %lu.\n", h.id);
return EIO;
}
if (write(fd, &h, sizeof(h)) != sizeof(h)) {
Log("1 namei_ConvertROtoRWvolume: Couldn't write header for RW-volume\
%lu.\n", h.id);
close(fd);
return EIO;
}
close(fd);
(void)afs_snprintf(headername, sizeof headername, VFORMAT, afs_printable_uint32_lu(volumeId));
(void)afs_snprintf(oldpath, sizeof oldpath, "%s/%s", pname, headername);
if (unlink(oldpath) < 0) {
Log("1 namei_ConvertROtoRWvolume: Couldn't unlink RO header, error = %d\n", errno);
}
FSYNC_VolOp(volumeId, pname, FSYNC_VOL_DONE, 0, NULL);
FSYNC_VolOp(h.id, pname, FSYNC_VOL_ON, 0, NULL);
#endif
return 0;
}
/* PrintInode
*
* returns a static string used to print either 32 or 64 bit inode numbers.
*/
char *
PrintInode(char *s, Inode ino)
{
static afs_ino_str_t result;
if (!s)
s = result;
(void)afs_snprintf(s, sizeof(afs_ino_str_t), "%llu", (afs_uintmax_t) ino);
return s;
}
#ifdef DELETE_ZLC
/* Routines to facilitate removing zero link count files. */
#define MAX_ZLC_NAMES 32
#define MAX_ZLC_NAMELEN 16
typedef struct zlcList_s {
struct zlcList_s *zlc_next;
int zlc_n;
char zlc_names[MAX_ZLC_NAMES][MAX_ZLC_NAMELEN];
} zlcList_t;
static zlcList_t *zlcAnchor = NULL;
static zlcList_t *zlcCur = NULL;
static void
AddToZLCDeleteList(char dir, char *name)
{
assert(strlen(name) <= MAX_ZLC_NAMELEN - 3);
if (!zlcCur || zlcCur->zlc_n >= MAX_ZLC_NAMES) {
if (zlcCur && zlcCur->zlc_next)
zlcCur = zlcCur->zlc_next;
else {
zlcList_t *tmp = (zlcList_t *) malloc(sizeof(zlcList_t));
if (!tmp)
return;
if (!zlcAnchor) {
zlcAnchor = tmp;
} else {
zlcCur->zlc_next = tmp;
}
zlcCur = tmp;
zlcCur->zlc_n = 0;
zlcCur->zlc_next = NULL;
}
}
(void)sprintf(zlcCur->zlc_names[zlcCur->zlc_n], "%c\\%s", dir, name);
zlcCur->zlc_n++;
}
static void
DeleteZLCFiles(char *path)
{
zlcList_t *z;
int i;
char fname[1024];
for (z = zlcAnchor; z; z = z->zlc_next) {
for (i = 0; i < z->zlc_n; i++) {
(void)sprintf(fname, "%s\\%s", path, z->zlc_names[i]);
if (namei_unlink(fname) < 0) {
Log("ZLC: Can't unlink %s, dos error = %d\n", fname,
GetLastError());
}
}
z->zlc_n = 0; /* Can reuse space. */
}
zlcCur = zlcAnchor;
}
static void
FreeZLCList(void)
{
zlcList_t *tnext;
zlcList_t *i;
i = zlcAnchor;
while (i) {
tnext = i->zlc_next;
free(i);
i = tnext;
}
zlcCur = zlcAnchor = NULL;
}
#endif
#endif /* AFS_NAMEI_ENV */
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