| /* |
| * linux/fs/ocfs2/ioctl.c |
| * |
| * Copyright (C) 2006 Herbert Poetzl |
| * adapted from Remy Card's ext2/ioctl.c |
| */ |
| |
| #include <linux/fs.h> |
| #include <linux/mount.h> |
| #include <linux/compat.h> |
| |
| #include <cluster/masklog.h> |
| |
| #include "ocfs2.h" |
| #include "alloc.h" |
| #include "dlmglue.h" |
| #include "file.h" |
| #include "inode.h" |
| #include "journal.h" |
| |
| #include "ocfs2_fs.h" |
| #include "ioctl.h" |
| #include "resize.h" |
| #include "refcounttree.h" |
| #include "sysfile.h" |
| #include "dir.h" |
| #include "buffer_head_io.h" |
| #include "suballoc.h" |
| #include "move_extents.h" |
| |
| #include <linux/ext2_fs.h> |
| |
| #define o2info_from_user(a, b) \ |
| copy_from_user(&(a), (b), sizeof(a)) |
| #define o2info_to_user(a, b) \ |
| copy_to_user((typeof(a) __user *)b, &(a), sizeof(a)) |
| |
| /* |
| * This call is void because we are already reporting an error that may |
| * be -EFAULT. The error will be returned from the ioctl(2) call. It's |
| * just a best-effort to tell userspace that this request caused the error. |
| */ |
| static inline void o2info_set_request_error(struct ocfs2_info_request *kreq, |
| struct ocfs2_info_request __user *req) |
| { |
| kreq->ir_flags |= OCFS2_INFO_FL_ERROR; |
| (void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags)); |
| } |
| |
| static inline void o2info_set_request_filled(struct ocfs2_info_request *req) |
| { |
| req->ir_flags |= OCFS2_INFO_FL_FILLED; |
| } |
| |
| static inline void o2info_clear_request_filled(struct ocfs2_info_request *req) |
| { |
| req->ir_flags &= ~OCFS2_INFO_FL_FILLED; |
| } |
| |
| static inline int o2info_coherent(struct ocfs2_info_request *req) |
| { |
| return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT)); |
| } |
| |
| static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags) |
| { |
| int status; |
| |
| status = ocfs2_inode_lock(inode, NULL, 0); |
| if (status < 0) { |
| mlog_errno(status); |
| return status; |
| } |
| ocfs2_get_inode_flags(OCFS2_I(inode)); |
| *flags = OCFS2_I(inode)->ip_attr; |
| ocfs2_inode_unlock(inode, 0); |
| |
| return status; |
| } |
| |
| static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags, |
| unsigned mask) |
| { |
| struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode); |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| handle_t *handle = NULL; |
| struct buffer_head *bh = NULL; |
| unsigned oldflags; |
| int status; |
| |
| mutex_lock(&inode->i_mutex); |
| |
| status = ocfs2_inode_lock(inode, &bh, 1); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| status = -EACCES; |
| if (!inode_owner_or_capable(inode)) |
| goto bail_unlock; |
| |
| if (!S_ISDIR(inode->i_mode)) |
| flags &= ~OCFS2_DIRSYNC_FL; |
| |
| handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| mlog_errno(status); |
| goto bail_unlock; |
| } |
| |
| oldflags = ocfs2_inode->ip_attr; |
| flags = flags & mask; |
| flags |= oldflags & ~mask; |
| |
| /* |
| * The IMMUTABLE and APPEND_ONLY flags can only be changed by |
| * the relevant capability. |
| */ |
| status = -EPERM; |
| if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) & |
| (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) { |
| if (!capable(CAP_LINUX_IMMUTABLE)) |
| goto bail_commit; |
| } |
| |
| ocfs2_inode->ip_attr = flags; |
| ocfs2_set_inode_flags(inode); |
| |
| status = ocfs2_mark_inode_dirty(handle, inode, bh); |
| if (status < 0) |
| mlog_errno(status); |
| |
| bail_commit: |
| ocfs2_commit_trans(osb, handle); |
| bail_unlock: |
| ocfs2_inode_unlock(inode, 1); |
| bail: |
| mutex_unlock(&inode->i_mutex); |
| |
| brelse(bh); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_blocksize(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_blocksize oib; |
| |
| if (o2info_from_user(oib, req)) |
| goto bail; |
| |
| oib.ib_blocksize = inode->i_sb->s_blocksize; |
| |
| o2info_set_request_filled(&oib.ib_req); |
| |
| if (o2info_to_user(oib, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oib.ib_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_clustersize(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_clustersize oic; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| if (o2info_from_user(oic, req)) |
| goto bail; |
| |
| oic.ic_clustersize = osb->s_clustersize; |
| |
| o2info_set_request_filled(&oic.ic_req); |
| |
| if (o2info_to_user(oic, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oic.ic_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_maxslots(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_maxslots oim; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| if (o2info_from_user(oim, req)) |
| goto bail; |
| |
| oim.im_max_slots = osb->max_slots; |
| |
| o2info_set_request_filled(&oim.im_req); |
| |
| if (o2info_to_user(oim, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oim.im_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_label(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_label oil; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| if (o2info_from_user(oil, req)) |
| goto bail; |
| |
| memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN); |
| |
| o2info_set_request_filled(&oil.il_req); |
| |
| if (o2info_to_user(oil, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oil.il_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_uuid(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_uuid oiu; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| if (o2info_from_user(oiu, req)) |
| goto bail; |
| |
| memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1); |
| |
| o2info_set_request_filled(&oiu.iu_req); |
| |
| if (o2info_to_user(oiu, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oiu.iu_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_fs_features(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_fs_features oif; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| if (o2info_from_user(oif, req)) |
| goto bail; |
| |
| oif.if_compat_features = osb->s_feature_compat; |
| oif.if_incompat_features = osb->s_feature_incompat; |
| oif.if_ro_compat_features = osb->s_feature_ro_compat; |
| |
| o2info_set_request_filled(&oif.if_req); |
| |
| if (o2info_to_user(oif, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oif.if_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_journal_size(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_journal_size oij; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| if (o2info_from_user(oij, req)) |
| goto bail; |
| |
| oij.ij_journal_size = osb->journal->j_inode->i_size; |
| |
| o2info_set_request_filled(&oij.ij_req); |
| |
| if (o2info_to_user(oij, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oij.ij_req, req); |
| |
| return status; |
| } |
| |
| int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb, |
| struct inode *inode_alloc, u64 blkno, |
| struct ocfs2_info_freeinode *fi, u32 slot) |
| { |
| int status = 0, unlock = 0; |
| |
| struct buffer_head *bh = NULL; |
| struct ocfs2_dinode *dinode_alloc = NULL; |
| |
| if (inode_alloc) |
| mutex_lock(&inode_alloc->i_mutex); |
| |
| if (o2info_coherent(&fi->ifi_req)) { |
| status = ocfs2_inode_lock(inode_alloc, &bh, 0); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| unlock = 1; |
| } else { |
| status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| |
| dinode_alloc = (struct ocfs2_dinode *)bh->b_data; |
| |
| fi->ifi_stat[slot].lfi_total = |
| le32_to_cpu(dinode_alloc->id1.bitmap1.i_total); |
| fi->ifi_stat[slot].lfi_free = |
| le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) - |
| le32_to_cpu(dinode_alloc->id1.bitmap1.i_used); |
| |
| bail: |
| if (unlock) |
| ocfs2_inode_unlock(inode_alloc, 0); |
| |
| if (inode_alloc) |
| mutex_unlock(&inode_alloc->i_mutex); |
| |
| brelse(bh); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_freeinode(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| u32 i; |
| u64 blkno = -1; |
| char namebuf[40]; |
| int status = -EFAULT, type = INODE_ALLOC_SYSTEM_INODE; |
| struct ocfs2_info_freeinode *oifi = NULL; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| struct inode *inode_alloc = NULL; |
| |
| oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL); |
| if (!oifi) { |
| status = -ENOMEM; |
| mlog_errno(status); |
| goto out_err; |
| } |
| |
| if (o2info_from_user(*oifi, req)) |
| goto bail; |
| |
| oifi->ifi_slotnum = osb->max_slots; |
| |
| for (i = 0; i < oifi->ifi_slotnum; i++) { |
| if (o2info_coherent(&oifi->ifi_req)) { |
| inode_alloc = ocfs2_get_system_file_inode(osb, type, i); |
| if (!inode_alloc) { |
| mlog(ML_ERROR, "unable to get alloc inode in " |
| "slot %u\n", i); |
| status = -EIO; |
| goto bail; |
| } |
| } else { |
| ocfs2_sprintf_system_inode_name(namebuf, |
| sizeof(namebuf), |
| type, i); |
| status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, |
| namebuf, |
| strlen(namebuf), |
| &blkno); |
| if (status < 0) { |
| status = -ENOENT; |
| goto bail; |
| } |
| } |
| |
| status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i); |
| if (status < 0) |
| goto bail; |
| |
| iput(inode_alloc); |
| inode_alloc = NULL; |
| } |
| |
| o2info_set_request_filled(&oifi->ifi_req); |
| |
| if (o2info_to_user(*oifi, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oifi->ifi_req, req); |
| |
| kfree(oifi); |
| out_err: |
| return status; |
| } |
| |
| static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, |
| unsigned int chunksize) |
| { |
| int index; |
| |
| index = __ilog2_u32(chunksize); |
| if (index >= OCFS2_INFO_MAX_HIST) |
| index = OCFS2_INFO_MAX_HIST - 1; |
| |
| hist->fc_chunks[index]++; |
| hist->fc_clusters[index] += chunksize; |
| } |
| |
| static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats, |
| unsigned int chunksize) |
| { |
| if (chunksize > stats->ffs_max) |
| stats->ffs_max = chunksize; |
| |
| if (chunksize < stats->ffs_min) |
| stats->ffs_min = chunksize; |
| |
| stats->ffs_avg += chunksize; |
| stats->ffs_free_chunks_real++; |
| } |
| |
| void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, |
| unsigned int chunksize) |
| { |
| o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); |
| o2ffg_update_stats(&(ffg->iff_ffs), chunksize); |
| } |
| |
| int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb, |
| struct inode *gb_inode, |
| struct ocfs2_dinode *gb_dinode, |
| struct ocfs2_chain_rec *rec, |
| struct ocfs2_info_freefrag *ffg, |
| u32 chunks_in_group) |
| { |
| int status = 0, used; |
| u64 blkno; |
| |
| struct buffer_head *bh = NULL; |
| struct ocfs2_group_desc *bg = NULL; |
| |
| unsigned int max_bits, num_clusters; |
| unsigned int offset = 0, cluster, chunk; |
| unsigned int chunk_free, last_chunksize = 0; |
| |
| if (!le32_to_cpu(rec->c_free)) |
| goto bail; |
| |
| do { |
| if (!bg) |
| blkno = le64_to_cpu(rec->c_blkno); |
| else |
| blkno = le64_to_cpu(bg->bg_next_group); |
| |
| if (bh) { |
| brelse(bh); |
| bh = NULL; |
| } |
| |
| if (o2info_coherent(&ffg->iff_req)) |
| status = ocfs2_read_group_descriptor(gb_inode, |
| gb_dinode, |
| blkno, &bh); |
| else |
| status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); |
| |
| if (status < 0) { |
| mlog(ML_ERROR, "Can't read the group descriptor # " |
| "%llu from device.", (unsigned long long)blkno); |
| status = -EIO; |
| goto bail; |
| } |
| |
| bg = (struct ocfs2_group_desc *)bh->b_data; |
| |
| if (!le16_to_cpu(bg->bg_free_bits_count)) |
| continue; |
| |
| max_bits = le16_to_cpu(bg->bg_bits); |
| offset = 0; |
| |
| for (chunk = 0; chunk < chunks_in_group; chunk++) { |
| /* |
| * last chunk may be not an entire one. |
| */ |
| if ((offset + ffg->iff_chunksize) > max_bits) |
| num_clusters = max_bits - offset; |
| else |
| num_clusters = ffg->iff_chunksize; |
| |
| chunk_free = 0; |
| for (cluster = 0; cluster < num_clusters; cluster++) { |
| used = ocfs2_test_bit(offset, |
| (unsigned long *)bg->bg_bitmap); |
| /* |
| * - chunk_free counts free clusters in #N chunk. |
| * - last_chunksize records the size(in) clusters |
| * for the last real free chunk being counted. |
| */ |
| if (!used) { |
| last_chunksize++; |
| chunk_free++; |
| } |
| |
| if (used && last_chunksize) { |
| ocfs2_info_update_ffg(ffg, |
| last_chunksize); |
| last_chunksize = 0; |
| } |
| |
| offset++; |
| } |
| |
| if (chunk_free == ffg->iff_chunksize) |
| ffg->iff_ffs.ffs_free_chunks++; |
| } |
| |
| /* |
| * need to update the info for last free chunk. |
| */ |
| if (last_chunksize) |
| ocfs2_info_update_ffg(ffg, last_chunksize); |
| |
| } while (le64_to_cpu(bg->bg_next_group)); |
| |
| bail: |
| brelse(bh); |
| |
| return status; |
| } |
| |
| int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, |
| struct inode *gb_inode, u64 blkno, |
| struct ocfs2_info_freefrag *ffg) |
| { |
| u32 chunks_in_group; |
| int status = 0, unlock = 0, i; |
| |
| struct buffer_head *bh = NULL; |
| struct ocfs2_chain_list *cl = NULL; |
| struct ocfs2_chain_rec *rec = NULL; |
| struct ocfs2_dinode *gb_dinode = NULL; |
| |
| if (gb_inode) |
| mutex_lock(&gb_inode->i_mutex); |
| |
| if (o2info_coherent(&ffg->iff_req)) { |
| status = ocfs2_inode_lock(gb_inode, &bh, 0); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| unlock = 1; |
| } else { |
| status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| |
| gb_dinode = (struct ocfs2_dinode *)bh->b_data; |
| cl = &(gb_dinode->id2.i_chain); |
| |
| /* |
| * Chunksize(in) clusters from userspace should be |
| * less than clusters in a group. |
| */ |
| if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) { |
| status = -EINVAL; |
| goto bail; |
| } |
| |
| memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats)); |
| |
| ffg->iff_ffs.ffs_min = ~0U; |
| ffg->iff_ffs.ffs_clusters = |
| le32_to_cpu(gb_dinode->id1.bitmap1.i_total); |
| ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters - |
| le32_to_cpu(gb_dinode->id1.bitmap1.i_used); |
| |
| chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1; |
| |
| for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { |
| rec = &(cl->cl_recs[i]); |
| status = ocfs2_info_freefrag_scan_chain(osb, gb_inode, |
| gb_dinode, |
| rec, ffg, |
| chunks_in_group); |
| if (status) |
| goto bail; |
| } |
| |
| if (ffg->iff_ffs.ffs_free_chunks_real) |
| ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg / |
| ffg->iff_ffs.ffs_free_chunks_real); |
| bail: |
| if (unlock) |
| ocfs2_inode_unlock(gb_inode, 0); |
| |
| if (gb_inode) |
| mutex_unlock(&gb_inode->i_mutex); |
| |
| if (gb_inode) |
| iput(gb_inode); |
| |
| brelse(bh); |
| |
| return status; |
| } |
| |
| int ocfs2_info_handle_freefrag(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| u64 blkno = -1; |
| char namebuf[40]; |
| int status = -EFAULT, type = GLOBAL_BITMAP_SYSTEM_INODE; |
| |
| struct ocfs2_info_freefrag *oiff; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| struct inode *gb_inode = NULL; |
| |
| oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL); |
| if (!oiff) { |
| status = -ENOMEM; |
| mlog_errno(status); |
| goto out_err; |
| } |
| |
| if (o2info_from_user(*oiff, req)) |
| goto bail; |
| /* |
| * chunksize from userspace should be power of 2. |
| */ |
| if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) || |
| (!oiff->iff_chunksize)) { |
| status = -EINVAL; |
| goto bail; |
| } |
| |
| if (o2info_coherent(&oiff->iff_req)) { |
| gb_inode = ocfs2_get_system_file_inode(osb, type, |
| OCFS2_INVALID_SLOT); |
| if (!gb_inode) { |
| mlog(ML_ERROR, "unable to get global_bitmap inode\n"); |
| status = -EIO; |
| goto bail; |
| } |
| } else { |
| ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, |
| OCFS2_INVALID_SLOT); |
| status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, |
| namebuf, |
| strlen(namebuf), |
| &blkno); |
| if (status < 0) { |
| status = -ENOENT; |
| goto bail; |
| } |
| } |
| |
| status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff); |
| if (status < 0) |
| goto bail; |
| |
| o2info_set_request_filled(&oiff->iff_req); |
| |
| if (o2info_to_user(*oiff, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oiff->iff_req, req); |
| |
| kfree(oiff); |
| out_err: |
| return status; |
| } |
| |
| int ocfs2_info_handle_unknown(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_request oir; |
| |
| if (o2info_from_user(oir, req)) |
| goto bail; |
| |
| o2info_clear_request_filled(&oir); |
| |
| if (o2info_to_user(oir, req)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| if (status) |
| o2info_set_request_error(&oir, req); |
| |
| return status; |
| } |
| |
| /* |
| * Validate and distinguish OCFS2_IOC_INFO requests. |
| * |
| * - validate the magic number. |
| * - distinguish different requests. |
| * - validate size of different requests. |
| */ |
| int ocfs2_info_handle_request(struct inode *inode, |
| struct ocfs2_info_request __user *req) |
| { |
| int status = -EFAULT; |
| struct ocfs2_info_request oir; |
| |
| if (o2info_from_user(oir, req)) |
| goto bail; |
| |
| status = -EINVAL; |
| if (oir.ir_magic != OCFS2_INFO_MAGIC) |
| goto bail; |
| |
| switch (oir.ir_code) { |
| case OCFS2_INFO_BLOCKSIZE: |
| if (oir.ir_size == sizeof(struct ocfs2_info_blocksize)) |
| status = ocfs2_info_handle_blocksize(inode, req); |
| break; |
| case OCFS2_INFO_CLUSTERSIZE: |
| if (oir.ir_size == sizeof(struct ocfs2_info_clustersize)) |
| status = ocfs2_info_handle_clustersize(inode, req); |
| break; |
| case OCFS2_INFO_MAXSLOTS: |
| if (oir.ir_size == sizeof(struct ocfs2_info_maxslots)) |
| status = ocfs2_info_handle_maxslots(inode, req); |
| break; |
| case OCFS2_INFO_LABEL: |
| if (oir.ir_size == sizeof(struct ocfs2_info_label)) |
| status = ocfs2_info_handle_label(inode, req); |
| break; |
| case OCFS2_INFO_UUID: |
| if (oir.ir_size == sizeof(struct ocfs2_info_uuid)) |
| status = ocfs2_info_handle_uuid(inode, req); |
| break; |
| case OCFS2_INFO_FS_FEATURES: |
| if (oir.ir_size == sizeof(struct ocfs2_info_fs_features)) |
| status = ocfs2_info_handle_fs_features(inode, req); |
| break; |
| case OCFS2_INFO_JOURNAL_SIZE: |
| if (oir.ir_size == sizeof(struct ocfs2_info_journal_size)) |
| status = ocfs2_info_handle_journal_size(inode, req); |
| break; |
| case OCFS2_INFO_FREEINODE: |
| if (oir.ir_size == sizeof(struct ocfs2_info_freeinode)) |
| status = ocfs2_info_handle_freeinode(inode, req); |
| break; |
| case OCFS2_INFO_FREEFRAG: |
| if (oir.ir_size == sizeof(struct ocfs2_info_freefrag)) |
| status = ocfs2_info_handle_freefrag(inode, req); |
| break; |
| default: |
| status = ocfs2_info_handle_unknown(inode, req); |
| break; |
| } |
| |
| bail: |
| return status; |
| } |
| |
| int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, |
| u64 *req_addr, int compat_flag) |
| { |
| int status = -EFAULT; |
| u64 __user *bp = NULL; |
| |
| if (compat_flag) { |
| #ifdef CONFIG_COMPAT |
| /* |
| * pointer bp stores the base address of a pointers array, |
| * which collects all addresses of separate request. |
| */ |
| bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests); |
| #else |
| BUG(); |
| #endif |
| } else |
| bp = (u64 __user *)(unsigned long)(info->oi_requests); |
| |
| if (o2info_from_user(*req_addr, bp + idx)) |
| goto bail; |
| |
| status = 0; |
| bail: |
| return status; |
| } |
| |
| /* |
| * OCFS2_IOC_INFO handles an array of requests passed from userspace. |
| * |
| * ocfs2_info_handle() recevies a large info aggregation, grab and |
| * validate the request count from header, then break it into small |
| * pieces, later specific handlers can handle them one by one. |
| * |
| * Idea here is to make each separate request small enough to ensure |
| * a better backward&forward compatibility, since a small piece of |
| * request will be less likely to be broken if disk layout get changed. |
| */ |
| int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, |
| int compat_flag) |
| { |
| int i, status = 0; |
| u64 req_addr; |
| struct ocfs2_info_request __user *reqp; |
| |
| if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) || |
| (!info->oi_requests)) { |
| status = -EINVAL; |
| goto bail; |
| } |
| |
| for (i = 0; i < info->oi_count; i++) { |
| |
| status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); |
| if (status) |
| break; |
| |
| reqp = (struct ocfs2_info_request *)(unsigned long)req_addr; |
| if (!reqp) { |
| status = -EINVAL; |
| goto bail; |
| } |
| |
| status = ocfs2_info_handle_request(inode, reqp); |
| if (status) |
| break; |
| } |
| |
| bail: |
| return status; |
| } |
| |
| long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| { |
| struct inode *inode = filp->f_path.dentry->d_inode; |
| unsigned int flags; |
| int new_clusters; |
| int status; |
| struct ocfs2_space_resv sr; |
| struct ocfs2_new_group_input input; |
| struct reflink_arguments args; |
| const char *old_path, *new_path; |
| bool preserve; |
| struct ocfs2_info info; |
| |
| switch (cmd) { |
| case OCFS2_IOC_GETFLAGS: |
| status = ocfs2_get_inode_attr(inode, &flags); |
| if (status < 0) |
| return status; |
| |
| flags &= OCFS2_FL_VISIBLE; |
| return put_user(flags, (int __user *) arg); |
| case OCFS2_IOC_SETFLAGS: |
| if (get_user(flags, (int __user *) arg)) |
| return -EFAULT; |
| |
| status = mnt_want_write_file(filp); |
| if (status) |
| return status; |
| status = ocfs2_set_inode_attr(inode, flags, |
| OCFS2_FL_MODIFIABLE); |
| mnt_drop_write(filp->f_path.mnt); |
| return status; |
| case OCFS2_IOC_RESVSP: |
| case OCFS2_IOC_RESVSP64: |
| case OCFS2_IOC_UNRESVSP: |
| case OCFS2_IOC_UNRESVSP64: |
| if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) |
| return -EFAULT; |
| |
| return ocfs2_change_file_space(filp, cmd, &sr); |
| case OCFS2_IOC_GROUP_EXTEND: |
| if (!capable(CAP_SYS_RESOURCE)) |
| return -EPERM; |
| |
| if (get_user(new_clusters, (int __user *)arg)) |
| return -EFAULT; |
| |
| return ocfs2_group_extend(inode, new_clusters); |
| case OCFS2_IOC_GROUP_ADD: |
| case OCFS2_IOC_GROUP_ADD64: |
| if (!capable(CAP_SYS_RESOURCE)) |
| return -EPERM; |
| |
| if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
| return -EFAULT; |
| |
| return ocfs2_group_add(inode, &input); |
| case OCFS2_IOC_REFLINK: |
| if (copy_from_user(&args, (struct reflink_arguments *)arg, |
| sizeof(args))) |
| return -EFAULT; |
| old_path = (const char *)(unsigned long)args.old_path; |
| new_path = (const char *)(unsigned long)args.new_path; |
| preserve = (args.preserve != 0); |
| |
| return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); |
| case OCFS2_IOC_INFO: |
| if (copy_from_user(&info, (struct ocfs2_info __user *)arg, |
| sizeof(struct ocfs2_info))) |
| return -EFAULT; |
| |
| return ocfs2_info_handle(inode, &info, 0); |
| case FITRIM: |
| { |
| struct super_block *sb = inode->i_sb; |
| struct fstrim_range range; |
| int ret = 0; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&range, (struct fstrim_range *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| ret = ocfs2_trim_fs(sb, &range); |
| if (ret < 0) |
| return ret; |
| |
| if (copy_to_user((struct fstrim_range *)arg, &range, |
| sizeof(range))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| case OCFS2_IOC_MOVE_EXT: |
| return ocfs2_ioctl_move_extents(filp, (void __user *)arg); |
| default: |
| return -ENOTTY; |
| } |
| } |
| |
| #ifdef CONFIG_COMPAT |
| long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| { |
| bool preserve; |
| struct reflink_arguments args; |
| struct inode *inode = file->f_path.dentry->d_inode; |
| struct ocfs2_info info; |
| |
| switch (cmd) { |
| case OCFS2_IOC32_GETFLAGS: |
| cmd = OCFS2_IOC_GETFLAGS; |
| break; |
| case OCFS2_IOC32_SETFLAGS: |
| cmd = OCFS2_IOC_SETFLAGS; |
| break; |
| case OCFS2_IOC_RESVSP: |
| case OCFS2_IOC_RESVSP64: |
| case OCFS2_IOC_UNRESVSP: |
| case OCFS2_IOC_UNRESVSP64: |
| case OCFS2_IOC_GROUP_EXTEND: |
| case OCFS2_IOC_GROUP_ADD: |
| case OCFS2_IOC_GROUP_ADD64: |
| case FITRIM: |
| break; |
| case OCFS2_IOC_REFLINK: |
| if (copy_from_user(&args, (struct reflink_arguments *)arg, |
| sizeof(args))) |
| return -EFAULT; |
| preserve = (args.preserve != 0); |
| |
| return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path), |
| compat_ptr(args.new_path), preserve); |
| case OCFS2_IOC_INFO: |
| if (copy_from_user(&info, (struct ocfs2_info __user *)arg, |
| sizeof(struct ocfs2_info))) |
| return -EFAULT; |
| |
| return ocfs2_info_handle(inode, &info, 1); |
| case OCFS2_IOC_MOVE_EXT: |
| break; |
| default: |
| return -ENOIOCTLCMD; |
| } |
| |
| return ocfs2_ioctl(file, cmd, arg); |
| } |
| #endif |