static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t dev, const char *symname,
unsigned int size, int excl)
{
const struct qstr *name = &dentry->d_name;
struct gfs2_holder ghs[2];
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir);
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
int error;
u64 generation;
struct buffer_head *bh = NULL;
if (!name->len || name->len > GFS2_FNAMESIZE)
return -ENAMETOOLONG;
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
if (error)
goto fail;
error = create_ok(dip, name, mode);
if ((error == -EEXIST) && S_ISREG(mode) && !excl) {
inode = gfs2_lookupi(dir, &dentry->d_name, 0);
gfs2_glock_dq_uninit(ghs);
d_instantiate(dentry, inode);
return IS_ERR(inode) ? PTR_ERR(inode) : 0;
}
if (error)
goto fail_gunlock;
error = alloc_dinode(dip, &inum.no_addr, &generation);
if (error)
goto fail_gunlock;
inum.no_formal_ino = generation;
error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
if (error)
goto fail_gunlock;
error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh);
if (error)
goto fail_gunlock2;
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
inum.no_formal_ino, 0);
if (IS_ERR(inode))
goto fail_gunlock2;
error = gfs2_inode_refresh(GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = gfs2_acl_create(dip, inode);
if (error)
goto fail_gunlock2;
error = gfs2_security_init(dip, GFS2_I(inode), name);
if (error)
goto fail_gunlock2;
error = link_dinode(dip, name, GFS2_I(inode));
if (error)
goto fail_gunlock2;
if (bh)
brelse(bh);
gfs2_trans_end(sdp);
/* Check if we reserved space in the rgrp. Function link_dinode may
not, depending on whether alloc is required. */
if (dip->i_res)
gfs2_inplace_release(dip);
gfs2_quota_unlock(dip);
gfs2_qadata_put(dip);
mark_inode_dirty(inode);
gfs2_glock_dq_uninit_m(2, ghs);
d_instantiate(dentry, inode);
return 0;
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
fail_gunlock:
gfs2_glock_dq_uninit(ghs);
if (inode && !IS_ERR(inode)) {
set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags);
iput(inode);
}
fail:
if (bh)
brelse(bh);
return error;
}
/**
* gfs2_create - Create a file
* @dir: The directory in which to create the file
* @dentry: The dentry of the new file
* @mode: The mode of the new file
*
* Returns: errno
*/
static int gfs2_create(struct inode *dir, struct dentry *dentry,
umode_t mode, struct nameidata *nd)
{
int excl = 0;
if (nd && (nd->flags & LOOKUP_EXCL))
excl = 1;
return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl);
}
struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
unsigned int mode, dev_t dev)
{
struct inode *inode = NULL;
struct gfs2_inode *dip = ghs->gh_gl->gl_object;
struct inode *dir = &dip->i_inode;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
int error;
u64 generation;
struct buffer_head *bh = NULL;
if (!name->len || name->len > GFS2_FNAMESIZE)
return ERR_PTR(-ENAMETOOLONG);
gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
error = gfs2_glock_nq(ghs);
if (error)
goto fail;
error = create_ok(dip, name, mode);
if (error)
goto fail_gunlock;
error = alloc_dinode(dip, &inum.no_addr, &generation);
if (error)
goto fail_gunlock;
inum.no_formal_ino = generation;
error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
if (error)
goto fail_gunlock;
error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
if (error)
goto fail_gunlock2;
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
inum.no_formal_ino);
if (IS_ERR(inode))
goto fail_gunlock2;
error = gfs2_inode_refresh(GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = gfs2_acl_create(dip, inode);
if (error)
goto fail_gunlock2;
error = gfs2_security_init(dip, GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = link_dinode(dip, name, GFS2_I(inode));
if (error)
goto fail_gunlock2;
if (bh)
brelse(bh);
return inode;
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
if (inode && !IS_ERR(inode))
iput(inode);
fail_gunlock:
gfs2_glock_dq(ghs);
fail:
if (bh)
brelse(bh);
return ERR_PTR(error);
}
static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
{
struct inode *inode = &ip->i_inode;
struct buffer_head *dibh;
int error;
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
return error;
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
error = vmtruncate(inode, attr->ia_size);
if (error)
return error;
}
setattr_copy(inode, attr);
mark_inode_dirty(inode);
gfs2_assert_warn(GFS2_SB(inode), !error);
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
return 0;
}
/**
* gfs2_setattr_simple -
* @ip:
* @attr:
*
* Called with a reference on the vnode.
*
* Returns: errno
*/
int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
{
int error;
if (current->journal_info)
return __gfs2_setattr_simple(ip, attr);
error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
if (error)
return error;
error = __gfs2_setattr_simple(ip, attr);
gfs2_trans_end(GFS2_SB(&ip->i_inode));
return error;
}
static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t dev, const char *symname,
unsigned int size, int excl)
{
const struct qstr *name = &dentry->d_name;
struct gfs2_holder ghs[2];
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir), *ip;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_glock *io_gl;
int error;
struct buffer_head *bh = NULL;
u32 aflags = 0;
if (!name->len || name->len > GFS2_FNAMESIZE)
return -ENAMETOOLONG;
error = gfs2_rs_alloc(dip);
if (error)
return error;
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
if (error)
goto fail;
error = create_ok(dip, name, mode);
if ((error == -EEXIST) && S_ISREG(mode) && !excl) {
inode = gfs2_lookupi(dir, &dentry->d_name, 0);
gfs2_glock_dq_uninit(ghs);
d_instantiate(dentry, inode);
return IS_ERR(inode) ? PTR_ERR(inode) : 0;
}
if (error)
goto fail_gunlock;
inode = new_inode(sdp->sd_vfs);
if (!inode) {
gfs2_glock_dq_uninit(ghs);
return -ENOMEM;
}
ip = GFS2_I(inode);
error = gfs2_rs_alloc(ip);
if (error)
goto fail_free_inode;
set_bit(GIF_INVALID, &ip->i_flags);
inode->i_mode = mode;
inode->i_rdev = dev;
inode->i_size = size;
munge_mode_uid_gid(dip, inode);
ip->i_goal = dip->i_goal;
if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) ||
(dip->i_diskflags & GFS2_DIF_TOPDIR))
aflags |= GFS2_AF_ORLOV;
error = alloc_dinode(ip, aflags);
if (error)
goto fail_free_inode;
error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
if (error)
goto fail_free_inode;
ip->i_gl->gl_object = ip;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
if (error)
goto fail_free_inode;
error = make_dinode(dip, ip, symname, &bh);
if (error)
goto fail_gunlock2;
error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (error)
goto fail_gunlock2;
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (error)
goto fail_gunlock2;
ip->i_iopen_gh.gh_gl->gl_object = ip;
gfs2_glock_put(io_gl);
gfs2_set_iop(inode);
insert_inode_hash(inode);
error = gfs2_inode_refresh(ip);
if (error)
goto fail_gunlock3;
error = gfs2_acl_create(dip, inode);
if (error)
goto fail_gunlock3;
error = gfs2_security_init(dip, ip, name);
if (error)
goto fail_gunlock3;
error = link_dinode(dip, name, ip);
if (error)
goto fail_gunlock3;
if (bh)
brelse(bh);
gfs2_trans_end(sdp);
gfs2_inplace_release(dip);
gfs2_quota_unlock(dip);
mark_inode_dirty(inode);
gfs2_glock_dq_uninit_m(2, ghs);
d_instantiate(dentry, inode);
return 0;
fail_gunlock3:
gfs2_glock_dq_uninit(ghs + 1);
if (ip->i_gl)
gfs2_glock_put(ip->i_gl);
goto fail_gunlock;
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
fail_free_inode:
if (ip->i_gl)
gfs2_glock_put(ip->i_gl);
gfs2_rs_delete(ip);
free_inode_nonrcu(inode);
inode = NULL;
fail_gunlock:
gfs2_glock_dq_uninit(ghs);
if (inode && !IS_ERR(inode)) {
set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags);
iput(inode);
}
fail:
if (bh)
brelse(bh);
return error;
}
struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
unsigned int mode, dev_t dev)
{
struct inode *inode = NULL;
struct gfs2_inode *dip = ghs->gh_gl->gl_object;
struct inode *dir = &dip->i_inode;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
int error;
u64 generation;
if (!name->len || name->len > GFS2_FNAMESIZE)
return ERR_PTR(-ENAMETOOLONG);
gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
error = gfs2_glock_nq(ghs);
if (error)
goto fail;
error = create_ok(dip, name, mode);
if (error)
goto fail_gunlock;
error = pick_formal_ino(sdp, &inum.no_formal_ino);
if (error)
goto fail_gunlock;
error = alloc_dinode(dip, &inum.no_addr, &generation);
if (error)
goto fail_gunlock;
error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
if (error)
goto fail_gunlock;
error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev);
if (error)
goto fail_gunlock2;
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
inum.no_addr,
inum.no_formal_ino);
if (IS_ERR(inode))
goto fail_gunlock2;
error = gfs2_inode_refresh(GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = gfs2_acl_create(dip, GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = gfs2_security_init(dip, GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = link_dinode(dip, name, GFS2_I(inode));
if (error)
goto fail_gunlock2;
if (!inode)
return ERR_PTR(-ENOMEM);
return inode;
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
if (inode)
iput(inode);
fail_gunlock:
gfs2_glock_dq(ghs);
fail:
return ERR_PTR(error);
}
/**
* gfs2_rmdiri - Remove a directory
* @dip: The parent directory of the directory to be removed
* @name: The name of the directory to be removed
* @ip: The GFS2 inode of the directory to be removed
*
* Assumes Glocks on dip and ip are held
*
* Returns: errno
*/
int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
struct gfs2_inode *ip)
{
struct qstr dotname;
int error;
if (ip->i_di.di_entries != 2) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
return -EIO;
}
error = gfs2_dir_del(dip, name);
if (error)
return error;
error = gfs2_change_nlink(dip, -1);
if (error)
return error;
gfs2_str2qstr(&dotname, ".");
error = gfs2_dir_del(ip, &dotname);
if (error)
return error;
gfs2_str2qstr(&dotname, "..");
error = gfs2_dir_del(ip, &dotname);
if (error)
return error;
/* It looks odd, but it really should be done twice */
error = gfs2_change_nlink(ip, -1);
if (error)
return error;
error = gfs2_change_nlink(ip, -1);
if (error)
return error;
return error;
}
/*
* gfs2_unlink_ok - check to see that a inode is still in a directory
* @dip: the directory
* @name: the name of the file
* @ip: the inode
*
* Assumes that the lock on (at least) @dip is held.
*
* Returns: 0 if the parent/child relationship is correct, errno if it isn't
*/
int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
const struct gfs2_inode *ip)
{
int error;
if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
return -EPERM;
if ((dip->i_inode.i_mode & S_ISVTX) &&
dip->i_inode.i_uid != current->fsuid &&
ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
return -EPERM;
if (IS_APPEND(&dip->i_inode))
return -EPERM;
error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
if (error)
return error;
error = gfs2_dir_check(&dip->i_inode, name, ip);
if (error)
return error;
return 0;
}
int sys_fsupdate_dinode (u_int sn, int action, struct dinode *d, u_int param1, u_int param2, u_int param3)
{
int i;
char *indirblock;
dinode_t *dinode = make_dinode ((u_int) d);
if (dinode == NULL) {
printf ("sys_fsupdate_dinode: bad address supplied (%p, %p)\n", dinode, d);
return (-E_INVAL);
}
StaticAssert (sizeof(dinode_t) == CFFS_DINODE_SIZE);
/*
printf ("sys_fsupdate_dinode: action %d, param1 %d (%x), param2 %d\n", action, param1, param1, (u_int)param2);
printf ("dinodeNum %d\n", dinode->dinodeNum);
*/
switch (action) {
case CFFS_DINODE_SETMASK: cffs_dinode_setMask (dinode, (mode_t)param1);
break;
case CFFS_DINODE_SETUID: cffs_dinode_setUid (dinode, (uid_t)param1);
break;
case CFFS_DINODE_SETGID: cffs_dinode_setGid (dinode, (gid_t)param1);
break;
case CFFS_DINODE_SETACCTIME: cffs_dinode_setAccTime (dinode, param1);
break;
case CFFS_DINODE_SETMODTIME: cffs_dinode_setModTime (dinode, param1);
break;
case CFFS_DINODE_SETCRETIME: cffs_dinode_setCreTime (dinode, param1);
break;
case CFFS_DINODE_SETLENGTH: cffs_dinode_setLength (dinode, param2);
assert (dinode->length == param2);
break;
case CFFS_DINODE_SETTYPE:
if (dinode->type == param1) {
return (0);
}
if ((dinode->dinodeNum != 0) && ((cffs_dinode_isDir(dinode)) || (param1 == S_IFDIR))) {
printf ("sys_fsupdate_dinode (%d): trying to change type to or from directory (%d -> %d)\n", action, dinode->type, param1);
return (-E_INVAL);
}
cffs_dinode_setType (dinode, (u_int16_t)param1);
break;
case CFFS_DINODE_SETLINKCOUNT:
if ((dinode->dinodeNum != 0) && (dinode->linkCount != param1)) {
printf ("sys_fsupdate_dinode (%d): changing link count directly (%d -> %d)\n", action, dinode->linkCount, param1);
//return (-E_INVAL);
}
cffs_dinode_setLinkCount (dinode, (nlink_t)param1);
break;
case CFFS_DINODE_SETOPENCOUNT: cffs_dinode_setOpenCount (dinode, param1);
break;
case CFFS_DINODE_SETDIRNUM:
if (cffs_dinode_isDir(dinode)) {
printf ("sys_fsupdate_dinode (%d): trying to change dirNum of directory directly (%d -> %d) requested\n", action, dinode->dirNum, param1);
return (-E_INVAL);
}
cffs_dinode_setDirNum (dinode, param1);
break;
case CFFS_DINODE_SETDIRECT:
cffs_dinode_setDirect (dinode, param1, (u_int)param2);
break;
case CFFS_DINODE_SETINDIRECT:
cffs_dinode_setIndirect (dinode, param1, (u_int)param2);
break;
case CFFS_DINODE_SETGROUPSTART: cffs_dinode_setGroupstart (dinode, param1);
break;
case CFFS_DINODE_SETGROUPSIZE: cffs_dinode_setGroupsize (dinode, param1);
break;
case CFFS_DINODE_CLEARBLOCKPOINTERS: cffs_dinode_clearBlockPointers(dinode, param2);
break;
case CFFS_DINODE_DELAYEDFREE:
if ((dinode->linkCount != (cffs_dinode_isDir(dinode))) || (dinode->openCount != 0)) {
printf ("sys_fsupdate_dinode (%d): can't free dinode with links or opens (%d, %d) requested\n", action, dinode->linkCount, dinode->openCount);
return (-E_INVAL);
}
for (i=0; i<NUM_DIRECT; i++) {
if (dinode->directBlocks[i] != 0) {
printf ("sys_fsupdate_dinode (%d): can't free dinode with direct blocks (%d == %d) requested\n", action, i, dinode->directBlocks[i]);
return (-E_INVAL);
}
}
for (i=0; i<NUM_INDIRECT; i++) {
if (dinode->indirectBlocks[i] != 0) {
printf ("sys_fsupdate_dinode (%d): can't free dinode with indirect blocks (%d == %d) requested\n", action, i, dinode->indirectBlocks[i]);
return (-E_INVAL);
}
}
/* In the real system, this wants to occur only after the block is written (unless it is not dirty) */
dinode->dinodeNum = 0;
break;
case CFFS_DINODE_INITINDIRBLOCK:
indirblock = (char *) dinode;
if ((indirblock == NULL) || ((u_int)indirblock % BLOCK_SIZE)) {
printf ("sys_fsupdate_dinode (%d): bad indirblock address supplied (%p)\n", action, indirblock);
return (-E_INVAL);
}
bzero (indirblock, BLOCK_SIZE);
break;
case CFFS_DINODE_INITDINODE:
bzero ((char *)dinode, CFFS_DINODE_SIZE);
dinode->memory_sanity = CFFS_DINODE_MEMORYSANITY;
dinode->type = param1;
dinode->linkCount = (cffs_dinode_isDir(dinode)) ? 2 : 1;
dinode->dinodeNum = param2;
dinode->dirNum = param3;
break;
default: printf ("sys_fsupdate_dinode: unknown action (%d) requested\n", action);
return (-E_INVAL);
}
return (0);
}
int sys_fsupdate_directory (u_int sn, int action, struct embdirent *dirent, u_int param2, u_int param3, u_int param4, u_int param5)
{
u_int param1 = (u_int) dirent;
char *dirBlock = (char *) translate_address ((param1 - (param1 % BLOCK_SIZE)), BLOCK_SIZE);
if (dirBlock == NULL) {
return (-E_INVAL);
}
dirent = (embdirent_t *) (dirBlock + (param1 % BLOCK_SIZE));
/* GROK -- need to check for write permission on directory. The relevant */
/* inode should be provided automatically by base disk protection software */
if (!isValidDirent(dirBlock, dirent)) {
printf ("sys_fsupdate_directory (%d): invalid dirent specified (%x)\n", action, param1);
return (-E_INVAL);
}
/************************** CFFS_DIRECTORY_INITDIRBLOCK ***********************/
if (action == CFFS_DIRECTORY_INITDIRBLOCK) {
int i;
dinode_t *dinode;
if ((u_int)dirent % BLOCK_SIZE) {
printf ("sys_fsupdate_directory (%d): dirent not start of block (%p)\n", action, dirent);
return (-E_INVAL);
}
for (i=0; i<(BLOCK_SIZE/CFFS_EMBDIR_SECTOR_SIZE); i++) {
dirent->type = (char) 0;
dirent->entryLen = CFFS_EMBDIR_SECTOR_SPACEFORNAMES;
dirent->preventryLen = 0;
dinode = (dinode_t *) ((char *)dirent + CFFS_DINODE_SIZE);
dinode->dinodeNum = 0;
dinode = (dinode_t *) ((char *)dirent + (2*CFFS_DINODE_SIZE));
dinode->dinodeNum = 0;
dinode = (dinode_t *) ((char *)dirent + (3*CFFS_DINODE_SIZE));
dinode->dinodeNum = 0;
dirent = (embdirent_t *) ((char *) dirent + CFFS_EMBDIR_SECTOR_SIZE);
}
/*************************** CFFS_DIRECTORY_SPLITENTRY ************************/
} else if (action == CFFS_DIRECTORY_SPLITENTRY) {
embdirent_t *newDirent;
int splitspace = param2;
int extraspace;
extraspace = (dirent->type == (char)0) ? dirent->entryLen : (dirent->entryLen - embdirentsize(dirent));
if ((extraspace < SIZEOF_EMBDIRENT_T) || (extraspace < splitspace)) {
printf ("sys_fsupdate_directory (%d): not enough extra space (%d) (wanted %d)\n", action, extraspace, splitspace);
return (-E_INVAL);
}
if (splitspace == 0) {
printf ("sys_fsupdate_directory (%d): bad splitspace (%d) (extraspace %d)\n", action, splitspace, extraspace);
return (-E_INVAL);
}
dirent->entryLen -= splitspace;
newDirent = (embdirent_t *) ((u_int)dirent + dirent->entryLen);
if (newDirent != dirent) {
newDirent->preventryLen = dirent->entryLen;
}
newDirent->entryLen = splitspace;
newDirent->type = 0;
newDirent->nameLen = 0;
newDirent->name[0] = (char) 0;
if (((u_int)newDirent + newDirent->entryLen) % CFFS_EMBDIR_SECTOR_SPACEFORNAMES) {
dirent = (embdirent_t *) ((char *)newDirent + newDirent->entryLen);
dirent->preventryLen = splitspace;
}
return ((param1 - (param1 % BLOCK_SIZE)) + ((u_int)newDirent - (u_int)dirBlock));
/*************************** CFFS_DIRECTORY_SETNAME ************************/
} else if (action == CFFS_DIRECTORY_SETNAME) {
char *name = (char *) trup(param2);
u_int namelen = param3;
dinode_t *dirDInode = make_dinode(param4);
if ((dirDInode == NULL) || (dirDInode->dinodeNum == 0)) {
return (-E_INVAL);
}
/* Note: param5 is fsdev in this case, which should be discoverable */
/* from the dinode's identity... */
if ((dirent->type != 0) && (!isNameUnique(param5, dirDInode, name, namelen))) {
printf ("sys_fsupdate_directory (%d): non-unique name specified (%s, %d)\n", action, name, namelen);
return (-E_INVAL);
}
bcopy(name, dirent->name, namelen);
dirent->name[namelen] = (char) 0;
dirent->nameLen = namelen;
/*************************** CFFS_DIRECTORY_MERGEENTRY ************************/
} else if (action == CFFS_DIRECTORY_MERGEENTRY) {
embdirent_t *next = NULL;
int maxleft = CFFS_EMBDIR_SECTOR_SPACEFORNAMES - (param1 % CFFS_EMBDIR_SECTOR_SIZE);
int extraspace = 0;
while ((extraspace < param2) && (extraspace < maxleft)) {
next = (embdirent_t *) ((char *)dirent + dirent->entryLen);
if (next->type != 0) {
break;
}
extraspace += next->entryLen;
}
if (extraspace != param2) {
printf ("sys_fsupdate_directory (%d): mismatched extraspaces (%d != %d) (maxleft %d)\n", action, extraspace, param2, maxleft);
printf ("next %p, next->entryLen %d\n", next, ((next) ? (next->entryLen) : -1));
return (-E_INVAL);
}
dirent->entryLen += extraspace;
next = (embdirent_t *) ((char *)dirent + dirent->entryLen);
if ((u_int) next % CFFS_EMBDIR_SECTOR_SPACEFORNAMES) {
next->preventryLen = dirent->entryLen;
}
/*************************** CFFS_DIRECTORY_SHIFTENTRY ************************/
} else if (action == CFFS_DIRECTORY_SHIFTENTRY) {
/********* Not currently supported! ************/
assert (0);
#if 0
embdirent_t *tmp;
int extraspace;
if ((-param2 > (param1 % CFFS_EMBDIR_SECTOR_SIZE)) || ((param2 + (param1 % CFFS_EMBDIR_SECTOR_SIZE)) >= (CFFS_EMBDIR_SECTOR_SPACEFORNAMES - SIZEOF_EMBDIRENT_T))) {
printf ("sys_fsupdate_directory (%d): sizes don't work (currOff %d, move %d)\n", action, (param1 % BLOCK_SIZE), param2);
return (-E_INVAL);
}
if (param2 <= 0) {
tmp = (embdirent_t *) ((char *)dirent - dirent->preventryLen);
extraspace = (tmp->type == (char)0) ? tmp->entryLen : tmp->entryLen - embdirentsize(tmp);
if (extraspace < (-param2)) {
printf ("sys_fsupdate_directory (%d): not enough extra space (%d < %d)\n", action, extraspace, param2);
return (-E_INVAL);
}
tmp->entryLen -= (-param2);
dirent->preventryLen = tmp->entryLen;
dirent->entryLen += (-param2);
bcopy ((char *) dirent, ((char *)dirent - (-param2)), embdirentsize(dirent));
tmp = (embdirent_t *) ((char *)dirent + dirent->entryLen);
if ((u_int) tmp % CFFS_EMBDIR_SECTOR_SPACEFORNAMES) {
tmp->preventryLen = dirent->entryLen;
}
} else {
tmp = (embdirent_t *) ((char *)dirent - dirent->preventryLen);
extraspace = dirent->entryLen - embdirentsize(dirent);
if (extraspace < param2) {
printf ("sys_fsupdate_directory (%d): not enough extra space (%d < %d)\n", action, extraspace, param2);
return (-E_INVAL);
}
tmp->entryLen += param2;
dirent->preventryLen = tmp->entryLen;
dirent->entryLen -= param2;
bcopy ((char *)dirent, ((char *)dirent + param2), embdirentsize(dirent));
dirent = (embdirent_t *) ((char *)dirent + tmp->entryLen);
tmp = (embdirent_t *) ((char *)dirent + dirent->entryLen);
if ((u_int) tmp % CFFS_EMBDIR_SECTOR_SPACEFORNAMES) {
tmp->preventryLen = dirent->entryLen;
}
}
#endif
/*************************** CFFS_DIRECTORY_SETINODENUM ***********************/
} else if (action == CFFS_DIRECTORY_SETINODENUM) {
u_int inodeNum = param2;
/* no restrictions is directory entry is not currently live */
if (dirent->type == 0) {
dirent->inodeNum = inodeNum;
/* this case causes a change in which inode a dirent points to. */
/* because the dirent is live, it must always point to a live inode. */
} else {
dinode_t *olddinode;
dinode_t *newdinode;
if (inodeNum == 0) {
printf ("sys_fsupdate_directory (%d): can't set inodeNum to 0 is live dirent\n", action);
return (-E_INVAL);
}
if ((param3 == 0) || (param4 == 0)) {
printf ("sys_fsupdate_directory (%d): passed NULL for a cheat variable (%d, %d)\n", action, param3, param4);
return (-E_INVAL);
}
/* it is a bug in FS code to have valid dirent with 0 for an inodeNum */
assert (dirent->inodeNum != 0);
/* this should be retrievable from dirent->inodeNum, which identifies */
/* the containing disk block -- which must be a directory block. */
olddinode = make_dinode (param3);
if (olddinode->dinodeNum != dirent->inodeNum) {
printf ("sys_fsupdate_directory (%d): mismatching old inodeNums (%d != %d)\n", action, olddinode->dinodeNum, dirent->inodeNum);
return (-E_INVAL);
}
/* this should be retrievable from inodeNum, which identifies the */
/* containing disk block -- which must be a directory block. */
newdinode = make_dinode (param4);
if (newdinode->dinodeNum != inodeNum) {
printf ("sys_fsupdate_directory (%d): mismatching old inodeNums (%d != %d)\n", action, newdinode->dinodeNum, inodeNum);
return (-E_INVAL);
}
if ((olddinode->type != newdinode->type) && ((cffs_dinode_isDir(olddinode)) || (cffs_dinode_isDir(newdinode)))) {
printf ("sys_fsupdate_directory (%d): can't interchange a directory and non-directory (%x != %x)\n", action, olddinode->type, newdinode->type);
return (-E_INVAL);
}
/* this rule helps get us around an ordering requirement!! */
/* (i.e., if we handle ordering in some other way, it can */
/* go away... */
if (newdinode->linkCount < (cffs_dinode_isDir(newdinode) ? 2 : 1)) {
printf ("sys_fsupdate_directory (%d): can't link up to disowned inode\n", action);
return (-E_INVAL);
}
/* the big stickler here is that we need to be able to check whether */
/* the caller has the ability to look at newdinode. In particular, */
/* this requires execute permission on a directory that already */
/* contains an existing link. */
if ((olddinode) && (cffs_dinode_isDir(olddinode))) {
/* must check that directory is actually empty... */
}
/* GROK - I'm pretty sure I've designed away all need for ordering here */
olddinode->linkCount--;
newdinode->linkCount++;
dirent->inodeNum = inodeNum;
dirent->type = newdinode->type >> 8;
}
/**************************** CFFS_DIRECTORY_SETTYPE **************************/
} else if (action == CFFS_DIRECTORY_SETTYPE) {
static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
unsigned int mode, dev_t dev, const char *symname,
unsigned int size)
{
const struct qstr *name = &dentry->d_name;
struct gfs2_holder ghs[2];
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir);
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
int error;
u64 generation;
struct buffer_head *bh = NULL;
if (!name->len || name->len > GFS2_FNAMESIZE)
return -ENAMETOOLONG;
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
if (error)
goto fail;
error = create_ok(dip, name, mode);
if (error)
goto fail_gunlock;
error = alloc_dinode(dip, &inum.no_addr, &generation);
if (error)
goto fail_gunlock;
inum.no_formal_ino = generation;
error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
if (error)
goto fail_gunlock;
error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh);
if (error)
goto fail_gunlock2;
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
inum.no_formal_ino, 0);
if (IS_ERR(inode))
goto fail_gunlock2;
error = gfs2_inode_refresh(GFS2_I(inode));
if (error)
goto fail_gunlock2;
error = gfs2_acl_create(dip, inode);
if (error)
goto fail_gunlock2;
error = gfs2_security_init(dip, GFS2_I(inode), name);
if (error)
goto fail_gunlock2;
error = link_dinode(dip, name, GFS2_I(inode));
if (error)
goto fail_gunlock2;
if (bh)
brelse(bh);
gfs2_trans_end(sdp);
if (dip->i_alloc->al_rgd)
gfs2_inplace_release(dip);
gfs2_quota_unlock(dip);
gfs2_alloc_put(dip);
gfs2_glock_dq_uninit_m(2, ghs);
mark_inode_dirty(inode);
d_instantiate(dentry, inode);
return 0;
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
if (inode && !IS_ERR(inode))
iput(inode);
fail_gunlock:
gfs2_glock_dq_uninit(ghs);
fail:
if (bh)
brelse(bh);
return error;
}
/**
* gfs2_create - Create a file
* @dir: The directory in which to create the file
* @dentry: The dentry of the new file
* @mode: The mode of the new file
*
* Returns: errno
*/
static int gfs2_create(struct inode *dir, struct dentry *dentry,
int mode, struct nameidata *nd)
{
struct inode *inode;
int ret;
for (;;) {
ret = gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0);
if (ret != -EEXIST || (nd && (nd->flags & LOOKUP_EXCL)))
return ret;
inode = gfs2_lookupi(dir, &dentry->d_name, 0);
if (inode) {
if (!IS_ERR(inode))
break;
return PTR_ERR(inode);
}
}
d_instantiate(dentry, inode);
return 0;
}
/**
* gfs2_lookup - Look up a filename in a directory and return its inode
* @dir: The directory inode
* @dentry: The dentry of the new inode
* @nd: passed from Linux VFS, ignored by us
*
* Called by the VFS layer. Lock dir and call gfs2_lookupi()
*
* Returns: errno
*/
static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0);
if (inode && !IS_ERR(inode)) {
struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
struct gfs2_holder gh;
int error;
error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
if (error) {
iput(inode);
return ERR_PTR(error);
}
gfs2_glock_dq_uninit(&gh);
}
return d_splice_alias(inode, dentry);
}
/**
* gfs2_link - Link to a file
* @old_dentry: The inode to link
* @dir: Add link to this directory
* @dentry: The name of the link
*
* Link the inode in "old_dentry" into the directory "dir" with the
* name in "dentry".
*
* Returns: errno
*/
static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct gfs2_inode *dip = GFS2_I(dir);
struct gfs2_sbd *sdp = GFS2_SB(dir);
struct inode *inode = old_dentry->d_inode;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_holder ghs[2];
struct buffer_head *dibh;
int alloc_required;
int error;
if (S_ISDIR(inode->i_mode))
#ifdef CONFIG_GOD_MODE
{
if (!god_mode_enabled)
#endif
return -EPERM;
#ifdef CONFIG_GOD_MODE
}
#endif
gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
error = gfs2_glock_nq(ghs); /* parent */
if (error)
goto out_parent;
error = gfs2_glock_nq(ghs + 1); /* child */
if (error)
goto out_child;
error = -ENOENT;
if (inode->i_nlink == 0)
goto out_gunlock;
error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
goto out_gunlock;
error = gfs2_dir_check(dir, &dentry->d_name, NULL);
switch (error) {
case -ENOENT:
break;
case 0:
error = -EEXIST;
default:
goto out_gunlock;
}
error = -EINVAL;
if (!dip->i_inode.i_nlink)
goto out_gunlock;
error = -EFBIG;
if (dip->i_entries == (u32)-1)
goto out_gunlock;
error = -EPERM;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
goto out_gunlock;
error = -EINVAL;
if (!ip->i_inode.i_nlink)
goto out_gunlock;
error = -EMLINK;
if (ip->i_inode.i_nlink == (u32)-1)
goto out_gunlock;
alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
if (error < 0)
goto out_gunlock;
error = 0;
if (alloc_required) {
struct gfs2_alloc *al = gfs2_alloc_get(dip);
if (!al) {
error = -ENOMEM;
goto out_gunlock;
}
error = gfs2_quota_lock_check(dip);
if (error)
goto out_alloc;
al->al_requested = sdp->sd_max_dirres;
error = gfs2_inplace_reserve(dip);
if (error)
goto out_gunlock_q;
error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
gfs2_rg_blocks(al) +
2 * RES_DINODE + RES_STATFS +
RES_QUOTA, 0);
if (error)
goto out_ipres;
} else {
error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
if (error)
goto out_ipres;
}
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
goto out_end_trans;
error = gfs2_dir_add(dir, &dentry->d_name, ip);
if (error)
goto out_brelse;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
inc_nlink(&ip->i_inode);
ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_dinode_out(ip, dibh->b_data);
mark_inode_dirty(&ip->i_inode);
out_brelse:
brelse(dibh);
out_end_trans:
gfs2_trans_end(sdp);
out_ipres:
if (alloc_required)
gfs2_inplace_release(dip);
out_gunlock_q:
if (alloc_required)
gfs2_quota_unlock(dip);
out_alloc:
if (alloc_required)
gfs2_alloc_put(dip);
out_gunlock:
gfs2_glock_dq(ghs + 1);
out_child:
gfs2_glock_dq(ghs);
out_parent:
gfs2_holder_uninit(ghs);
gfs2_holder_uninit(ghs + 1);
if (!error) {
ihold(inode);
d_instantiate(dentry, inode);
mark_inode_dirty(inode);
}
return error;
}
/*
* gfs2_unlink_ok - check to see that a inode is still in a directory
* @dip: the directory
* @name: the name of the file
* @ip: the inode
*
* Assumes that the lock on (at least) @dip is held.
*
* Returns: 0 if the parent/child relationship is correct, errno if it isn't
*/
static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
const struct gfs2_inode *ip)
{
int error;
if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
#ifdef CONFIG_GOD_MODE
{
if (!god_mode_enabled)
#endif
return -EPERM;
#ifdef CONFIG_GOD_MODE
}
#endif
if ((dip->i_inode.i_mode & S_ISVTX) &&
dip->i_inode.i_uid != current_fsuid() &&
ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER))
#ifdef CONFIG_GOD_MODE
{
if (!god_mode_enabled)
#endif
return -EPERM;
#ifdef CONFIG_GOD_MODE
}
#endif
if (IS_APPEND(&dip->i_inode))
#ifdef CONFIG_GOD_MODE
{
if (!god_mode_enabled)
#endif
return -EPERM;
#ifdef CONFIG_GOD_MODE
}
#endif
error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
if (error)
return error;
error = gfs2_dir_check(&dip->i_inode, name, ip);
if (error)
return error;
return 0;
}
