/**
* Write a jindex file given a list of journal inums.
* master: Inode of the master directory
* jnls: List of inum structures relating to previously created journals.
* nmemb: The number of entries in the list (number of journals).
* Returns 0 on success or non-zero on error with errno set.
*/
int lgfs2_build_jindex(struct gfs2_inode *master, struct gfs2_inum *jnls, size_t nmemb)
{
char fname[GFS2_FNAMESIZE + 1];
struct gfs2_inode *jindex;
unsigned j;
int ret;
if (nmemb == 0 || jnls == NULL) {
errno = EINVAL;
return 1;
}
jindex = createi(master, "jindex", S_IFDIR | 0700, GFS2_DIF_SYSTEM);
if (jindex == NULL)
return 1;
fname[GFS2_FNAMESIZE] = '\0';
for (j = 0; j < nmemb; j++) {
snprintf(fname, GFS2_FNAMESIZE, "journal%u", j);
ret = dir_add(jindex, fname, strlen(fname), &jnls[j], IF2DT(S_IFREG | 0600));
if (ret) {
inode_put(&jindex);
return 1;
}
}
if (cfg_debug) {
printf("\nJindex:\n");
gfs2_dinode_print(&jindex->i_di);
}
inode_put(&jindex);
return 0;
}
int build_jindex(struct gfs2_sbd *sdp)
{
struct gfs2_inode *jindex;
unsigned int j;
int ret;
jindex = createi(sdp->master_dir, "jindex", S_IFDIR | 0700,
GFS2_DIF_SYSTEM);
if (jindex == NULL) {
return errno;
}
sdp->md.journal = malloc(sdp->md.journals *
sizeof(struct gfs2_inode *));
for (j = 0; j < sdp->md.journals; j++) {
ret = build_journal(sdp, j, jindex);
if (ret)
return ret;
inode_put(&sdp->md.journal[j]);
}
if (cfg_debug) {
printf("\nJindex:\n");
gfs2_dinode_print(&jindex->i_di);
}
free(sdp->md.journal);
inode_put(&jindex);
return 0;
}
int build_master(struct gfs2_sbd *sdp)
{
struct gfs2_inum inum;
uint64_t bn;
struct gfs2_buffer_head *bh = NULL;
int err = lgfs2_dinode_alloc(sdp, 1, &bn);
if (err != 0)
return -1;
inum.no_formal_ino = sdp->md.next_inum++;
inum.no_addr = bn;
err = init_dinode(sdp, &bh, &inum, S_IFDIR | 0755, GFS2_DIF_SYSTEM, &inum);
if (err != 0)
return -1;
sdp->master_dir = lgfs2_inode_get(sdp, bh);
if (sdp->master_dir == NULL)
return -1;
if (cfg_debug) {
printf("\nMaster dir:\n");
gfs2_dinode_print(&sdp->master_dir->i_di);
}
sdp->master_dir->bh_owned = 1;
return 0;
}
static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
{
const struct gfs2_dinode *str = buf;
struct timespec atime;
u16 height, depth;
if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
goto corrupt;
ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
ip->i_inode.i_rdev = 0;
switch (ip->i_inode.i_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
be32_to_cpu(str->di_minor));
break;
};
ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
ip->i_disksize = be64_to_cpu(str->di_size);
i_size_write(&ip->i_inode, ip->i_disksize);
gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
atime.tv_sec = be64_to_cpu(str->di_atime);
atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
ip->i_inode.i_atime = atime;
ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
ip->i_goal = be64_to_cpu(str->di_goal_meta);
ip->i_generation = be64_to_cpu(str->di_generation);
ip->i_diskflags = be32_to_cpu(str->di_flags);
gfs2_set_inode_flags(&ip->i_inode);
height = be16_to_cpu(str->di_height);
if (unlikely(height > GFS2_MAX_META_HEIGHT))
goto corrupt;
ip->i_height = (u8)height;
depth = be16_to_cpu(str->di_depth);
if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
goto corrupt;
ip->i_depth = (u8)depth;
ip->i_entries = be32_to_cpu(str->di_entries);
ip->i_eattr = be64_to_cpu(str->di_eattr);
if (S_ISREG(ip->i_inode.i_mode))
gfs2_set_aops(&ip->i_inode);
return 0;
corrupt:
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
return -EIO;
}
int build_root(struct gfs2_sbd *sdp)
{
struct gfs2_inum inum;
uint64_t bn;
struct gfs2_buffer_head *bh = NULL;
int err = lgfs2_dinode_alloc(sdp, 1, &bn);
if (err != 0)
return -1;
inum.no_formal_ino = sdp->md.next_inum++;
inum.no_addr = bn;
err = init_dinode(sdp, &bh, &inum, S_IFDIR | 0755, 0, &inum);
if (err != 0)
return -1;
sdp->md.rooti = lgfs2_inode_get(sdp, bh);
if (sdp->md.rooti == NULL)
return -1;
if (cfg_debug) {
printf("\nRoot directory:\n");
gfs2_dinode_print(&sdp->md.rooti->i_di);
}
sdp->md.rooti->bh_owned = 1;
return 0;
}
int build_per_node(struct gfs2_sbd *sdp)
{
struct gfs2_inode *per_node;
unsigned int j;
int err;
per_node = createi(sdp->master_dir, "per_node", S_IFDIR | 0700,
GFS2_DIF_SYSTEM);
if (per_node == NULL) {
return errno;
}
for (j = 0; j < sdp->md.journals; j++) {
err = build_inum_range(per_node, j);
if (err) {
return err;
}
err = build_statfs_change(per_node, j);
if (err) {
return err;
}
err = build_quota_change(per_node, j);
if (err) {
return err;
}
}
if (cfg_debug) {
printf("\nper_node:\n");
gfs2_dinode_print(&per_node->i_di);
}
inode_put(&per_node);
return 0;
}
int gfs2_dinode_dealloc(struct gfs2_inode *ip)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al;
struct gfs2_rgrpd *rgd;
int error;
if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
return -EIO;
}
al = gfs2_alloc_get(ip);
if (!al)
return -ENOMEM;
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
if (error)
goto out;
error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
if (error)
goto out_qs;
rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
if (!rgd) {
gfs2_consist_inode(ip);
error = -EIO;
goto out_rindex_relse;
}
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
&al->al_rgd_gh);
if (error)
goto out_rindex_relse;
error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
if (error)
goto out_rg_gunlock;
set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
gfs2_free_di(rgd, ip);
gfs2_trans_end(sdp);
clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
out_rg_gunlock:
gfs2_glock_dq_uninit(&al->al_rgd_gh);
out_rindex_relse:
gfs2_glock_dq_uninit(&al->al_ri_gh);
out_qs:
gfs2_quota_unhold(ip);
out:
gfs2_alloc_put(ip);
return error;
}
static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
{
struct gfs2_dinode_host *di = &ip->i_di;
const struct gfs2_dinode *str = buf;
if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
return -EIO;
}
ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
ip->i_inode.i_rdev = 0;
switch (ip->i_inode.i_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
be32_to_cpu(str->di_minor));
break;
};
ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
/*
* We will need to review setting the nlink count here in the
* light of the forthcoming ro bind mount work. This is a reminder
* to do that.
*/
ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
di->di_size = be64_to_cpu(str->di_size);
i_size_write(&ip->i_inode, di->di_size);
di->di_blocks = be64_to_cpu(str->di_blocks);
gfs2_set_inode_blocks(&ip->i_inode);
ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
di->di_goal_meta = be64_to_cpu(str->di_goal_meta);
di->di_goal_data = be64_to_cpu(str->di_goal_data);
di->di_generation = be64_to_cpu(str->di_generation);
di->di_flags = be32_to_cpu(str->di_flags);
gfs2_set_inode_flags(&ip->i_inode);
di->di_height = be16_to_cpu(str->di_height);
di->di_depth = be16_to_cpu(str->di_depth);
di->di_entries = be32_to_cpu(str->di_entries);
di->di_eattr = be64_to_cpu(str->di_eattr);
if (S_ISREG(ip->i_inode.i_mode))
gfs2_set_aops(&ip->i_inode);
return 0;
}
static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
{
struct gfs2_inode *dip = GFS2_I(dir);
struct gfs2_sbd *sdp = GFS2_SB(dir);
struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
struct gfs2_holder ghs[3];
struct gfs2_rgrpd *rgd;
struct gfs2_holder ri_gh;
int error;
error = gfs2_rindex_hold(sdp, &ri_gh);
if (error)
return error;
gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
error = gfs2_glock_nq_m(3, ghs);
if (error)
goto out;
error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
if (error)
goto out_gunlock;
if (ip->i_di.di_entries < 2) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
error = -EIO;
goto out_gunlock;
}
if (ip->i_di.di_entries > 2) {
error = -ENOTEMPTY;
goto out_gunlock;
}
error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0);
if (error)
goto out_gunlock;
error = gfs2_rmdiri(dip, &dentry->d_name, ip);
gfs2_trans_end(sdp);
out_gunlock:
gfs2_glock_dq_m(3, ghs);
out:
gfs2_holder_uninit(ghs);
gfs2_holder_uninit(ghs + 1);
gfs2_holder_uninit(ghs + 2);
gfs2_glock_dq_uninit(&ri_gh);
return error;
}
int build_statfs(struct gfs2_sbd *sdp)
{
struct gfs2_inode *ip;
ip = createi(sdp->master_dir, "statfs", S_IFREG | 0600,
GFS2_DIF_SYSTEM | GFS2_DIF_JDATA);
if (ip == NULL) {
return errno;
}
if (cfg_debug) {
printf("\nStatFS Inode:\n");
gfs2_dinode_print(&ip->i_di);
}
inode_put(&ip);
return 0;
}
int build_quota_change(struct gfs2_inode *per_node, unsigned int j)
{
struct gfs2_sbd *sdp = per_node->i_sbd;
struct gfs2_meta_header mh;
char name[256];
struct gfs2_inode *ip;
unsigned int blocks = sdp->qcsize << (20 - sdp->sd_sb.sb_bsize_shift);
unsigned int x;
unsigned int hgt;
struct gfs2_buffer_head *bh;
memset(&mh, 0, sizeof(struct gfs2_meta_header));
mh.mh_magic = GFS2_MAGIC;
mh.mh_type = GFS2_METATYPE_QC;
mh.mh_format = GFS2_FORMAT_QC;
sprintf(name, "quota_change%u", j);
ip = createi(per_node, name, S_IFREG | 0600, GFS2_DIF_SYSTEM);
if (ip == NULL) {
return errno;
}
hgt = calc_tree_height(ip, (blocks + 1) * sdp->bsize);
build_height(ip, hgt);
for (x = 0; x < blocks; x++) {
bh = get_file_buf(ip, x, FALSE);
if (!bh)
return -1;
memset(bh->b_data, 0, sdp->bsize);
gfs2_meta_header_out(&mh, bh->b_data);
bmodified(bh);
brelse(bh);
}
if (cfg_debug) {
printf("\nQuota Change %u:\n", j);
gfs2_dinode_print(&ip->i_di);
}
inode_put(&ip);
return 0;
}
static int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
struct gfs2_inode *ip)
{
struct qstr dotname;
int error;
if (ip->i_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;
}
int build_rindex(struct gfs2_sbd *sdp)
{
struct gfs2_inode *ip;
struct osi_node *n, *next = NULL;
struct rgrp_tree *rl;
char buf[sizeof(struct gfs2_rindex)];
int count;
ip = createi(sdp->master_dir, "rindex", S_IFREG | 0600,
GFS2_DIF_SYSTEM | GFS2_DIF_JDATA);
if (ip == NULL) {
return errno;
}
ip->i_di.di_payload_format = GFS2_FORMAT_RI;
bmodified(ip->i_bh);
for (n = osi_first(&sdp->rgtree); n; n = next) {
next = osi_next(n);
rl = (struct rgrp_tree *)n;
gfs2_rindex_out(&rl->ri, buf);
count = gfs2_writei(ip, buf, ip->i_di.di_size,
sizeof(struct gfs2_rindex));
if (count != sizeof(struct gfs2_rindex))
return -1;
}
memset(buf, 0, sizeof(struct gfs2_rindex));
count = __gfs2_writei(ip, buf, ip->i_di.di_size,
sizeof(struct gfs2_rindex), 0);
if (count != sizeof(struct gfs2_rindex))
return -1;
if (cfg_debug) {
printf("\nResource Index:\n");
gfs2_dinode_print(&ip->i_di);
}
inode_put(&ip);
return 0;
}
int build_statfs_change(struct gfs2_inode *per_node, unsigned int j)
{
char name[256];
struct gfs2_inode *ip;
sprintf(name, "statfs_change%u", j);
ip = createi(per_node, name, S_IFREG | 0600,
GFS2_DIF_SYSTEM | GFS2_DIF_JDATA);
if (ip == NULL) {
return errno;
}
ip->i_di.di_size = sizeof(struct gfs2_statfs_change);
gfs2_dinode_out(&ip->i_di, ip->i_bh->b_data);
bmodified(ip->i_bh);
if (cfg_debug) {
printf("\nStatFS Change %u:\n", j);
gfs2_dinode_print(&ip->i_di);
}
inode_put(&ip);
return 0;
}
/**
* gfs2_change_nlink - Change nlink count on inode
* @ip: The GFS2 inode
* @diff: The change in the nlink count required
*
* Returns: errno
*/
int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
{
struct buffer_head *dibh;
u32 nlink;
int error;
BUG_ON(diff != 1 && diff != -1);
nlink = ip->i_inode.i_nlink + diff;
/* If we are reducing the nlink count, but the new value ends up being
bigger than the old one, we must have underflowed. */
if (diff < 0 && nlink > ip->i_inode.i_nlink) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
return -EIO;
}
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
return error;
if (diff > 0)
inc_nlink(&ip->i_inode);
else
drop_nlink(&ip->i_inode);
ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
mark_inode_dirty(&ip->i_inode);
if (ip->i_inode.i_nlink == 0)
gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
return error;
}
static int gfs2_rename(struct inode *odir, struct dentry *odentry,
struct inode *ndir, struct dentry *ndentry)
{
struct gfs2_inode *odip = GFS2_I(odir);
struct gfs2_inode *ndip = GFS2_I(ndir);
struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
struct gfs2_inode *nip = NULL;
struct gfs2_sbd *sdp = GFS2_SB(odir);
struct gfs2_holder ghs[5], r_gh;
struct gfs2_rgrpd *nrgd;
unsigned int num_gh;
int dir_rename = 0;
int alloc_required;
unsigned int x;
int error;
if (ndentry->d_inode) {
nip = GFS2_I(ndentry->d_inode);
if (ip == nip)
return 0;
}
/* Make sure we aren't trying to move a dirctory into it's subdir */
if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) {
dir_rename = 1;
error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0,
&r_gh);
if (error)
goto out;
error = gfs2_ok_to_move(ip, ndip);
if (error)
goto out_gunlock_r;
}
num_gh = 1;
gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
if (odip != ndip) {
gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
num_gh++;
}
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
num_gh++;
if (nip) {
gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
num_gh++;
/* grab the resource lock for unlink flag twiddling
* this is the case of the target file already existing
* so we unlink before doing the rename
*/
nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
if (nrgd)
gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
}
error = gfs2_glock_nq_m(num_gh, ghs);
if (error)
goto out_uninit;
/* Check out the old directory */
error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
if (error)
goto out_gunlock;
/* Check out the new directory */
if (nip) {
error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
if (error)
goto out_gunlock;
if (S_ISDIR(nip->i_inode.i_mode)) {
if (nip->i_di.di_entries < 2) {
if (gfs2_consist_inode(nip))
gfs2_dinode_print(nip);
error = -EIO;
goto out_gunlock;
}
if (nip->i_di.di_entries > 2) {
error = -ENOTEMPTY;
goto out_gunlock;
}
}
} else {
error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
if (error)
goto out_gunlock;
error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
switch (error) {
case -ENOENT:
error = 0;
break;
case 0:
error = -EEXIST;
default:
goto out_gunlock;
};
if (odip != ndip) {
if (!ndip->i_inode.i_nlink) {
error = -EINVAL;
goto out_gunlock;
}
if (ndip->i_di.di_entries == (u32)-1) {
error = -EFBIG;
goto out_gunlock;
}
if (S_ISDIR(ip->i_inode.i_mode) &&
ndip->i_inode.i_nlink == (u32)-1) {
error = -EMLINK;
goto out_gunlock;
}
}
}
/* Check out the dir to be renamed */
if (dir_rename) {
error = gfs2_permission(odentry->d_inode, MAY_WRITE);
if (error)
goto out_gunlock;
}
alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
if (error < 0)
goto out_gunlock;
error = 0;
if (alloc_required) {
struct gfs2_alloc *al = gfs2_alloc_get(ndip);
if (!al) {
error = -ENOMEM;
goto out_gunlock;
}
error = gfs2_quota_lock_check(ndip);
if (error)
goto out_alloc;
al->al_requested = sdp->sd_max_dirres;
error = gfs2_inplace_reserve(ndip);
if (error)
goto out_gunlock_q;
error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
al->al_rgd->rd_length +
4 * RES_DINODE + 4 * RES_LEAF +
RES_STATFS + RES_QUOTA + 4, 0);
if (error)
goto out_ipreserv;
} else {
error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
5 * RES_LEAF + 4, 0);
if (error)
goto out_gunlock;
}
/* Remove the target file, if it exists */
if (nip) {
if (S_ISDIR(nip->i_inode.i_mode))
error = gfs2_rmdiri(ndip, &ndentry->d_name, nip);
else {
error = gfs2_dir_del(ndip, &ndentry->d_name);
if (error)
goto out_end_trans;
error = gfs2_change_nlink(nip, -1);
}
if (error)
goto out_end_trans;
}
if (dir_rename) {
struct qstr name;
gfs2_str2qstr(&name, "..");
error = gfs2_change_nlink(ndip, +1);
if (error)
goto out_end_trans;
error = gfs2_change_nlink(odip, -1);
if (error)
goto out_end_trans;
error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
if (error)
goto out_end_trans;
} else {
struct buffer_head *dibh;
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
goto out_end_trans;
ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
}
error = gfs2_dir_del(odip, &odentry->d_name);
if (error)
goto out_end_trans;
error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
if (error)
goto out_end_trans;
out_end_trans:
gfs2_trans_end(sdp);
out_ipreserv:
if (alloc_required)
gfs2_inplace_release(ndip);
out_gunlock_q:
if (alloc_required)
gfs2_quota_unlock(ndip);
out_alloc:
if (alloc_required)
gfs2_alloc_put(ndip);
out_gunlock:
gfs2_glock_dq_m(num_gh, ghs);
out_uninit:
for (x = 0; x < num_gh; x++)
gfs2_holder_uninit(ghs + x);
out_gunlock_r:
if (dir_rename)
gfs2_glock_dq_uninit(&r_gh);
out:
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 display_gfs2(struct gfs2_buffer_head *dbh)
{
struct gfs2_meta_header mh;
struct gfs2_rgrp rg;
struct gfs2_leaf lf;
struct gfs_log_header lh1;
struct gfs2_log_header lh;
struct gfs2_log_descriptor ld;
struct gfs2_quota_change qc;
uint32_t magic;
magic = be32_to_cpu(*(uint32_t *)dbh->b_data);
switch (magic)
{
case GFS2_MAGIC:
gfs2_meta_header_in(&mh, dbh);
if (mh.mh_type > GFS2_METATYPE_QC)
print_gfs2("Unknown metadata type");
else
print_gfs2("%s:", block_type_str[mh.mh_type]);
eol(0);
switch (mh.mh_type)
{
case GFS2_METATYPE_SB:
gfs2_sb_in(&sbd.sd_sb, dbh);
gfs2_sb_print2(&sbd.sd_sb);
break;
case GFS2_METATYPE_RG:
if (sbd.gfs1) {
struct gfs_rgrp rg1;
gfs1_rgrp_in(&rg1, dbh);
gfs1_rgrp_print(&rg1);
} else {
gfs2_rgrp_in(&rg, dbh);
gfs2_rgrp_print(&rg);
}
break;
case GFS2_METATYPE_RB:
gfs2_meta_header_print(&mh);
break;
case GFS2_METATYPE_DI:
gfs2_dinode_print(&di);
break;
case GFS2_METATYPE_IN:
gfs2_meta_header_print(&mh);
break;
case GFS2_METATYPE_LF:
gfs2_leaf_in(&lf, dbh);
gfs2_leaf_print(&lf);
break;
case GFS2_METATYPE_JD:
gfs2_meta_header_print(&mh);
break;
case GFS2_METATYPE_LH:
if (sbd.gfs1) {
gfs_log_header_in(&lh1, dbh);
gfs_log_header_print(&lh1);
} else {
gfs2_log_header_in(&lh, dbh);
gfs2_log_header_print(&lh);
}
break;
case GFS2_METATYPE_LD:
gfs2_log_descriptor_in(&ld, dbh);
gfs2_log_descriptor_print(&ld);
break;
case GFS2_METATYPE_EA:
do_eattr_extended(dbh);
break;
case GFS2_METATYPE_ED:
gfs2_meta_header_print(&mh);
break;
case GFS2_METATYPE_LB:
gfs2_meta_header_print(&mh);
break;
case GFS2_METATYPE_QC:
gfs2_quota_change_in(&qc, dbh);
gfs2_quota_change_print(&qc);
break;
default:
break;
}
break;
default:
print_gfs2("Unknown block type");
eol(0);
break;
};
return(0);
}
