int ocfs2_init_slot_info(struct ocfs2_super *osb)
{
int status;
struct inode *inode = NULL;
struct ocfs2_slot_info *si;
si = kzalloc(sizeof(struct ocfs2_slot_info) +
(sizeof(struct ocfs2_slot) * osb->max_slots),
GFP_KERNEL);
if (!si) {
status = -ENOMEM;
mlog_errno(status);
return status;
}
si->si_extended = ocfs2_uses_extended_slot_map(osb);
si->si_num_slots = osb->max_slots;
si->si_slots = (struct ocfs2_slot *)((char *)si +
sizeof(struct ocfs2_slot_info));
inode = ocfs2_get_system_file_inode(osb, SLOT_MAP_SYSTEM_INODE,
OCFS2_INVALID_SLOT);
if (!inode) {
status = -EINVAL;
mlog_errno(status);
goto bail;
}
si->si_inode = inode;
status = ocfs2_map_slot_buffers(osb, si);
if (status < 0) {
mlog_errno(status);
goto bail;
}
osb->slot_info = (struct ocfs2_slot_info *)si;
bail:
if (status < 0)
__ocfs2_free_slot_info(si);
return status;
}
/*
* Calculate how many bytes are needed by the slot map. Returns
* an error if the slot map file is too small.
*/
static int ocfs2_slot_map_physical_size(struct ocfs2_super *osb,
struct inode *inode,
unsigned long long *bytes)
{
unsigned long long bytes_needed;
if (ocfs2_uses_extended_slot_map(osb)) {
bytes_needed = osb->max_slots *
sizeof(struct ocfs2_extended_slot);
} else {
bytes_needed = osb->max_slots * sizeof(__le16);
}
if (bytes_needed > i_size_read(inode)) {
mlog(ML_ERROR,
"Slot map file is too small! (size %llu, needed %llu)\n",
i_size_read(inode), bytes_needed);
return -ENOSPC;
}
*bytes = bytes_needed;
return 0;
}
static errcode_t add_slots(ocfs2_filesys *fs, int num_slots)
{
errcode_t ret;
uint16_t old_num = OCFS2_RAW_SB(fs->fs_super)->s_max_slots;
char fname[OCFS2_MAX_FILENAME_LEN];
uint64_t blkno;
int i, j, max_slots;
int ftype;
struct tools_progress *prog = NULL;
if (ocfs2_uses_extended_slot_map(OCFS2_RAW_SB(fs->fs_super))) {
ret = TUNEFS_ET_TOO_MANY_SLOTS_EXTENDED;
max_slots = INT16_MAX;
} else {
ret = TUNEFS_ET_TOO_MANY_SLOTS_OLD;
max_slots = OCFS2_MAX_SLOTS;
}
if (num_slots > max_slots)
goto bail;
prog = tools_progress_start("Adding slots", "addslots",
(NUM_SYSTEM_INODES -
OCFS2_LAST_GLOBAL_SYSTEM_INODE - 1) *
(num_slots - old_num));
if (!prog) {
ret = TUNEFS_ET_NO_MEMORY;
goto bail;
}
ret = 0;
for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; i < NUM_SYSTEM_INODES; ++i) {
for (j = old_num; j < num_slots; ++j) {
ocfs2_sprintf_system_inode_name(fname,
OCFS2_MAX_FILENAME_LEN,
i, j);
verbosef(VL_APP, "Creating system file \"%s\"\n",
fname);
/* Goto next if file already exists */
ret = ocfs2_lookup(fs, fs->fs_sysdir_blkno, fname,
strlen(fname), NULL, &blkno);
if (!ret) {
verbosef(VL_APP,
"System file \"%s\" already exists\n",
fname);
tools_progress_step(prog, 1);
continue;
}
/* create inode for system file */
ret = ocfs2_new_system_inode(fs, &blkno,
ocfs2_system_inodes[i].si_mode,
ocfs2_system_inodes[i].si_iflags);
if (ret) {
verbosef(VL_APP,
"%s while creating inode for "
"system file \"%s\"\n",
error_message(ret), fname);
goto bail;
}
ftype = (S_ISDIR(ocfs2_system_inodes[i].si_mode) ?
OCFS2_FT_DIR : OCFS2_FT_REG_FILE);
/* if dir, alloc space to it */
if (ftype == OCFS2_FT_DIR) {
ret = ocfs2_init_dir(fs, blkno,
fs->fs_sysdir_blkno);
if (ret) {
verbosef(VL_APP,
"%s while initializing "
"directory \"%s\"\n",
error_message(ret),
fname);
goto bail;
}
}
/* Add the inode to the system dir */
ret = ocfs2_link(fs, fs->fs_sysdir_blkno, fname,
blkno, ftype);
if (ret) {
verbosef(VL_APP,
"%s while linking inode %"PRIu64" "
"as \"%s\" in the system "
"directory\n",
error_message(ret), blkno, fname);
goto bail;
}
verbosef(VL_APP, "System file \"%s\" created\n",
fname);
tools_progress_step(prog, 1);
}
}
bail:
if (prog)
tools_progress_stop(prog);
return ret;
}
