Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 817 insertions, 4 deletions

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 7d9d9c132cef..bc91072b7219 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -9,7 +9,6 @@
 #include <linux/mount.h>
 #include <linux/compat.h>
 
-#define MLOG_MASK_PREFIX ML_INODE
 #include <cluster/masklog.h>
 
 #include "ocfs2.h"
@@ -23,9 +22,46 @@
 #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;
@@ -39,7 +75,6 @@ static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
         *flags = OCFS2_I(inode)->ip_attr;
         ocfs2_inode_unlock(inode, 0);
 
-        mlog_exit(status);
         return status;
 }
 
@@ -62,7 +97,7 @@ static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
         }
 
         status = -EACCES;
-        if (!is_owner_or_cap(inode))
+        if (!inode_owner_or_capable(inode))
                 goto bail_unlock;
 
         if (!S_ISDIR(inode->i_mode))
@@ -105,7 +140,743 @@ bail:
 
         brelse(bh);
 
-        mlog_exit(status);
+        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 bail;
+        }
+
+        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);
+
+        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 bail;
+        }
+
+        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);
+
+        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;
 }
 
@@ -120,6 +891,7 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         struct reflink_arguments args;
         const char *old_path, *new_path;
         bool preserve;
+        struct ocfs2_info info;
 
         switch (cmd) {
         case OCFS2_IOC_GETFLAGS:
@@ -174,6 +946,37 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                 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;
         }
@@ -185,6 +988,7 @@ 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:
@@ -200,6 +1004,7 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
         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,
@@ -209,6 +1014,14 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 
                 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;
         }