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-rw-r--r--fs/exofs/ios.c803
1 files changed, 0 insertions, 803 deletions
diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c
deleted file mode 100644
index f74a2ec027a..00000000000
--- a/fs/exofs/ios.c
+++ /dev/null
@@ -1,803 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <bharrosh@panasas.com>
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation. Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/slab.h>
-#include <scsi/scsi_device.h>
-#include <asm/div64.h>
-
-#include "exofs.h"
-
-#define EXOFS_DBGMSG2(M...) do {} while (0)
-/* #define EXOFS_DBGMSG2 EXOFS_DBGMSG */
-
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
-{
- osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
-}
-
-int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
- u64 offset, void *p, unsigned length)
-{
- struct osd_request *or = osd_start_request(od, GFP_KERNEL);
-/* struct osd_sense_info osi = {.key = 0};*/
- int ret;
-
- if (unlikely(!or)) {
- EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__);
- return -ENOMEM;
- }
- ret = osd_req_read_kern(or, obj, offset, p, length);
- if (unlikely(ret)) {
- EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__);
- goto out;
- }
-
- ret = osd_finalize_request(or, 0, cred, NULL);
- if (unlikely(ret)) {
- EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n", ret);
- goto out;
- }
-
- ret = osd_execute_request(or);
- if (unlikely(ret))
- EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
- /* osd_req_decode_sense(or, ret); */
-
-out:
- osd_end_request(or);
- return ret;
-}
-
-int exofs_get_io_state(struct exofs_layout *layout,
- struct exofs_io_state **pios)
-{
- struct exofs_io_state *ios;
-
- /*TODO: Maybe use kmem_cach per sbi of size
- * exofs_io_state_size(layout->s_numdevs)
- */
- ios = kzalloc(exofs_io_state_size(layout->s_numdevs), GFP_KERNEL);
- if (unlikely(!ios)) {
- EXOFS_DBGMSG("Failed kzalloc bytes=%d\n",
- exofs_io_state_size(layout->s_numdevs));
- *pios = NULL;
- return -ENOMEM;
- }
-
- ios->layout = layout;
- ios->obj.partition = layout->s_pid;
- *pios = ios;
- return 0;
-}
-
-void exofs_put_io_state(struct exofs_io_state *ios)
-{
- if (ios) {
- unsigned i;
-
- for (i = 0; i < ios->numdevs; i++) {
- struct exofs_per_dev_state *per_dev = &ios->per_dev[i];
-
- if (per_dev->or)
- osd_end_request(per_dev->or);
- if (per_dev->bio)
- bio_put(per_dev->bio);
- }
-
- kfree(ios);
- }
-}
-
-unsigned exofs_layout_od_id(struct exofs_layout *layout,
- osd_id obj_no, unsigned layout_index)
-{
-/* switch (layout->lay_func) {
- case LAYOUT_MOVING_WINDOW:
- {*/
- unsigned dev_mod = obj_no;
-
- return (layout_index + dev_mod * layout->mirrors_p1) %
- layout->s_numdevs;
-/* }
- case LAYOUT_FUNC_IMPLICT:
- return layout->devs[layout_index];
- }*/
-}
-
-static inline struct osd_dev *exofs_ios_od(struct exofs_io_state *ios,
- unsigned layout_index)
-{
- return ios->layout->s_ods[
- exofs_layout_od_id(ios->layout, ios->obj.id, layout_index)];
-}
-
-static void _sync_done(struct exofs_io_state *ios, void *p)
-{
- struct completion *waiting = p;
-
- complete(waiting);
-}
-
-static void _last_io(struct kref *kref)
-{
- struct exofs_io_state *ios = container_of(
- kref, struct exofs_io_state, kref);
-
- ios->done(ios, ios->private);
-}
-
-static void _done_io(struct osd_request *or, void *p)
-{
- struct exofs_io_state *ios = p;
-
- kref_put(&ios->kref, _last_io);
-}
-
-static int exofs_io_execute(struct exofs_io_state *ios)
-{
- DECLARE_COMPLETION_ONSTACK(wait);
- bool sync = (ios->done == NULL);
- int i, ret;
-
- if (sync) {
- ios->done = _sync_done;
- ios->private = &wait;
- }
-
- for (i = 0; i < ios->numdevs; i++) {
- struct osd_request *or = ios->per_dev[i].or;
- if (unlikely(!or))
- continue;
-
- ret = osd_finalize_request(or, 0, ios->cred, NULL);
- if (unlikely(ret)) {
- EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n",
- ret);
- return ret;
- }
- }
-
- kref_init(&ios->kref);
-
- for (i = 0; i < ios->numdevs; i++) {
- struct osd_request *or = ios->per_dev[i].or;
- if (unlikely(!or))
- continue;
-
- kref_get(&ios->kref);
- osd_execute_request_async(or, _done_io, ios);
- }
-
- kref_put(&ios->kref, _last_io);
- ret = 0;
-
- if (sync) {
- wait_for_completion(&wait);
- ret = exofs_check_io(ios, NULL);
- }
- return ret;
-}
-
-static void _clear_bio(struct bio *bio)
-{
- struct bio_vec *bv;
- unsigned i;
-
- __bio_for_each_segment(bv, bio, i, 0) {
- unsigned this_count = bv->bv_len;
-
- if (likely(PAGE_SIZE == this_count))
- clear_highpage(bv->bv_page);
- else
- zero_user(bv->bv_page, bv->bv_offset, this_count);
- }
-}
-
-int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
-{
- enum osd_err_priority acumulated_osd_err = 0;
- int acumulated_lin_err = 0;
- int i;
-
- for (i = 0; i < ios->numdevs; i++) {
- struct osd_sense_info osi;
- struct osd_request *or = ios->per_dev[i].or;
- int ret;
-
- if (unlikely(!or))
- continue;
-
- ret = osd_req_decode_sense(or, &osi);
- if (likely(!ret))
- continue;
-
- if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) {
- /* start read offset passed endof file */
- _clear_bio(ios->per_dev[i].bio);
- EXOFS_DBGMSG("start read offset passed end of file "
- "offset=0x%llx, length=0x%llx\n",
- _LLU(ios->per_dev[i].offset),
- _LLU(ios->per_dev[i].length));
-
- continue; /* we recovered */
- }
-
- if (osi.osd_err_pri >= acumulated_osd_err) {
- acumulated_osd_err = osi.osd_err_pri;
- acumulated_lin_err = ret;
- }
- }
-
- /* TODO: raid specific residual calculations */
- if (resid) {
- if (likely(!acumulated_lin_err))
- *resid = 0;
- else
- *resid = ios->length;
- }
-
- return acumulated_lin_err;
-}
-
-/*
- * L - logical offset into the file
- *
- * U - The number of bytes in a stripe within a group
- *
- * U = stripe_unit * group_width
- *
- * T - The number of bytes striped within a group of component objects
- * (before advancing to the next group)
- *
- * T = stripe_unit * group_width * group_depth
- *
- * S - The number of bytes striped across all component objects
- * before the pattern repeats
- *
- * S = stripe_unit * group_width * group_depth * group_count
- *
- * M - The "major" (i.e., across all components) stripe number
- *
- * M = L / S
- *
- * G - Counts the groups from the beginning of the major stripe
- *
- * G = (L - (M * S)) / T [or (L % S) / T]
- *
- * H - The byte offset within the group
- *
- * H = (L - (M * S)) % T [or (L % S) % T]
- *
- * N - The "minor" (i.e., across the group) stripe number
- *
- * N = H / U
- *
- * C - The component index coresponding to L
- *
- * C = (H - (N * U)) / stripe_unit + G * group_width
- * [or (L % U) / stripe_unit + G * group_width]
- *
- * O - The component offset coresponding to L
- *
- * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit
- */
-struct _striping_info {
- u64 obj_offset;
- u64 group_length;
- unsigned dev;
- unsigned unit_off;
-};
-
-static void _calc_stripe_info(struct exofs_io_state *ios, u64 file_offset,
- struct _striping_info *si)
-{
- u32 stripe_unit = ios->layout->stripe_unit;
- u32 group_width = ios->layout->group_width;
- u64 group_depth = ios->layout->group_depth;
-
- u32 U = stripe_unit * group_width;
- u64 T = U * group_depth;
- u64 S = T * ios->layout->group_count;
- u64 M = div64_u64(file_offset, S);
-
- /*
- G = (L - (M * S)) / T
- H = (L - (M * S)) % T
- */
- u64 LmodS = file_offset - M * S;
- u32 G = div64_u64(LmodS, T);
- u64 H = LmodS - G * T;
-
- u32 N = div_u64(H, U);
-
- /* "H - (N * U)" is just "H % U" so it's bound to u32 */
- si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width;
- si->dev *= ios->layout->mirrors_p1;
-
- div_u64_rem(file_offset, stripe_unit, &si->unit_off);
-
- si->obj_offset = si->unit_off + (N * stripe_unit) +
- (M * group_depth * stripe_unit);
-
- si->group_length = T - H;
-}
-
-static int _add_stripe_unit(struct exofs_io_state *ios, unsigned *cur_pg,
- unsigned pgbase, struct exofs_per_dev_state *per_dev,
- int cur_len)
-{
- unsigned pg = *cur_pg;
- struct request_queue *q =
- osd_request_queue(exofs_ios_od(ios, per_dev->dev));
-
- per_dev->length += cur_len;
-
- if (per_dev->bio == NULL) {
- unsigned pages_in_stripe = ios->layout->group_width *
- (ios->layout->stripe_unit / PAGE_SIZE);
- unsigned bio_size = (ios->nr_pages + pages_in_stripe) /
- ios->layout->group_width;
-
- per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size);
- if (unlikely(!per_dev->bio)) {
- EXOFS_DBGMSG("Failed to allocate BIO size=%u\n",
- bio_size);
- return -ENOMEM;
- }
- }
-
- while (cur_len > 0) {
- unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);
- unsigned added_len;
-
- BUG_ON(ios->nr_pages <= pg);
- cur_len -= pglen;
-
- added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg],
- pglen, pgbase);
- if (unlikely(pglen != added_len))
- return -ENOMEM;
- pgbase = 0;
- ++pg;
- }
- BUG_ON(cur_len);
-
- *cur_pg = pg;
- return 0;
-}
-
-static int _prepare_one_group(struct exofs_io_state *ios, u64 length,
- struct _striping_info *si)
-{
- unsigned stripe_unit = ios->layout->stripe_unit;
- unsigned mirrors_p1 = ios->layout->mirrors_p1;
- unsigned devs_in_group = ios->layout->group_width * mirrors_p1;
- unsigned dev = si->dev;
- unsigned first_dev = dev - (dev % devs_in_group);
- unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0;
- unsigned cur_pg = ios->pages_consumed;
- int ret = 0;
-
- while (length) {
- struct exofs_per_dev_state *per_dev = &ios->per_dev[dev];
- unsigned cur_len, page_off = 0;
-
- if (!per_dev->length) {
- per_dev->dev = dev;
- if (dev < si->dev) {
- per_dev->offset = si->obj_offset + stripe_unit -
- si->unit_off;
- cur_len = stripe_unit;
- } else if (dev == si->dev) {
- per_dev->offset = si->obj_offset;
- cur_len = stripe_unit - si->unit_off;
- page_off = si->unit_off & ~PAGE_MASK;
- BUG_ON(page_off && (page_off != ios->pgbase));
- } else { /* dev > si->dev */
- per_dev->offset = si->obj_offset - si->unit_off;
- cur_len = stripe_unit;
- }
-
- if (max_comp < dev)
- max_comp = dev;
- } else {
- cur_len = stripe_unit;
- }
- if (cur_len >= length)
- cur_len = length;
-
- ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev,
- cur_len);
- if (unlikely(ret))
- goto out;
-
- dev += mirrors_p1;
- dev = (dev % devs_in_group) + first_dev;
-
- length -= cur_len;
- }
-out:
- ios->numdevs = max_comp + mirrors_p1;
- ios->pages_consumed = cur_pg;
- return ret;
-}
-
-static int _prepare_for_striping(struct exofs_io_state *ios)
-{
- u64 length = ios->length;
- u64 offset = ios->offset;
- struct _striping_info si;
- int ret = 0;
-
- if (!ios->pages) {
- if (ios->kern_buff) {
- struct exofs_per_dev_state *per_dev = &ios->per_dev[0];
-
- _calc_stripe_info(ios, ios->offset, &si);
- per_dev->offset = si.obj_offset;
- per_dev->dev = si.dev;
-
- /* no cross device without page array */
- BUG_ON((ios->layout->group_width > 1) &&
- (si.unit_off + ios->length >
- ios->layout->stripe_unit));
- }
- ios->numdevs = ios->layout->mirrors_p1;
- return 0;
- }
-
- while (length) {
- _calc_stripe_info(ios, offset, &si);
-
- if (length < si.group_length)
- si.group_length = length;
-
- ret = _prepare_one_group(ios, si.group_length, &si);
- if (unlikely(ret))
- goto out;
-
- offset += si.group_length;
- length -= si.group_length;
- }
-
-out:
- return ret;
-}
-
-int exofs_sbi_create(struct exofs_io_state *ios)
-{
- int i, ret;
-
- for (i = 0; i < ios->layout->s_numdevs; i++) {
- struct osd_request *or;
-
- or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL);
- if (unlikely(!or)) {
- EXOFS_ERR("%s: osd_start_request failed\n", __func__);
- ret = -ENOMEM;
- goto out;
- }
- ios->per_dev[i].or = or;
- ios->numdevs++;
-
- osd_req_create_object(or, &ios->obj);
- }
- ret = exofs_io_execute(ios);
-
-out:
- return ret;
-}
-
-int exofs_sbi_remove(struct exofs_io_state *ios)
-{
- int i, ret;
-
- for (i = 0; i < ios->layout->s_numdevs; i++) {
- struct osd_request *or;
-
- or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL);
- if (unlikely(!or)) {
- EXOFS_ERR("%s: osd_start_request failed\n", __func__);
- ret = -ENOMEM;
- goto out;
- }
- ios->per_dev[i].or = or;
- ios->numdevs++;
-
- osd_req_remove_object(or, &ios->obj);
- }
- ret = exofs_io_execute(ios);
-
-out:
- return ret;
-}
-
-static int _sbi_write_mirror(struct exofs_io_state *ios, int cur_comp)
-{
- struct exofs_per_dev_state *master_dev = &ios->per_dev[cur_comp];
- unsigned dev = ios->per_dev[cur_comp].dev;
- unsigned last_comp = cur_comp + ios->layout->mirrors_p1;
- int ret = 0;
-
- if (ios->pages && !master_dev->length)
- return 0; /* Just an empty slot */
-
- for (; cur_comp < last_comp; ++cur_comp, ++dev) {
- struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp];
- struct osd_request *or;
-
- or = osd_start_request(exofs_ios_od(ios, dev), GFP_KERNEL);
- if (unlikely(!or)) {
- EXOFS_ERR("%s: osd_start_request failed\n", __func__);
- ret = -ENOMEM;
- goto out;
- }
- per_dev->or = or;
- per_dev->offset = master_dev->offset;
-
- if (ios->pages) {
- struct bio *bio;
-
- if (per_dev != master_dev) {
- bio = bio_kmalloc(GFP_KERNEL,
- master_dev->bio->bi_max_vecs);
- if (unlikely(!bio)) {
- EXOFS_DBGMSG(
- "Failed to allocate BIO size=%u\n",
- master_dev->bio->bi_max_vecs);
- ret = -ENOMEM;
- goto out;
- }
-
- __bio_clone(bio, master_dev->bio);
- bio->bi_bdev = NULL;
- bio->bi_next = NULL;
- per_dev->length = master_dev->length;
- per_dev->bio = bio;
- per_dev->dev = dev;
- } else {
- bio = master_dev->bio;
- /* FIXME: bio_set_dir() */
- bio->bi_rw |= REQ_WRITE;
- }
-
- osd_req_write(or, &ios->obj, per_dev->offset, bio,
- per_dev->length);
- EXOFS_DBGMSG("write(0x%llx) offset=0x%llx "
- "length=0x%llx dev=%d\n",
- _LLU(ios->obj.id), _LLU(per_dev->offset),
- _LLU(per_dev->length), dev);
- } else if (ios->kern_buff) {
- ret = osd_req_write_kern(or, &ios->obj, per_dev->offset,
- ios->kern_buff, ios->length);
- if (unlikely(ret))
- goto out;
- EXOFS_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
- "length=0x%llx dev=%d\n",
- _LLU(ios->obj.id), _LLU(per_dev->offset),
- _LLU(ios->length), dev);
- } else {
- osd_req_set_attributes(or, &ios->obj);
- EXOFS_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
- _LLU(ios->obj.id), ios->out_attr_len, dev);
- }
-
- if (ios->out_attr)
- osd_req_add_set_attr_list(or, ios->out_attr,
- ios->out_attr_len);
-
- if (ios->in_attr)
- osd_req_add_get_attr_list(or, ios->in_attr,
- ios->in_attr_len);
- }
-
-out:
- return ret;
-}
-
-int exofs_sbi_write(struct exofs_io_state *ios)
-{
- int i;
- int ret;
-
- ret = _prepare_for_striping(ios);
- if (unlikely(ret))
- return ret;
-
- for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
- ret = _sbi_write_mirror(ios, i);
- if (unlikely(ret))
- return ret;
- }
-
- ret = exofs_io_execute(ios);
- return ret;
-}
-
-static int _sbi_read_mirror(struct exofs_io_state *ios, unsigned cur_comp)
-{
- struct osd_request *or;
- struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp];
- unsigned first_dev = (unsigned)ios->obj.id;
-
- if (ios->pages && !per_dev->length)
- return 0; /* Just an empty slot */
-
- first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1;
- or = osd_start_request(exofs_ios_od(ios, first_dev), GFP_KERNEL);
- if (unlikely(!or)) {
- EXOFS_ERR("%s: osd_start_request failed\n", __func__);
- return -ENOMEM;
- }
- per_dev->or = or;
-
- if (ios->pages) {
- osd_req_read(or, &ios->obj, per_dev->offset,
- per_dev->bio, per_dev->length);
- EXOFS_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx"
- " dev=%d\n", _LLU(ios->obj.id),
- _LLU(per_dev->offset), _LLU(per_dev->length),
- first_dev);
- } else if (ios->kern_buff) {
- int ret = osd_req_read_kern(or, &ios->obj, per_dev->offset,
- ios->kern_buff, ios->length);
- EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
- "length=0x%llx dev=%d ret=>%d\n",
- _LLU(ios->obj.id), _LLU(per_dev->offset),
- _LLU(ios->length), first_dev, ret);
- if (unlikely(ret))
- return ret;
- } else {
- osd_req_get_attributes(or, &ios->obj);
- EXOFS_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n",
- _LLU(ios->obj.id), ios->in_attr_len, first_dev);
- }
- if (ios->out_attr)
- osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len);
-
- if (ios->in_attr)
- osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len);
-
- return 0;
-}
-
-int exofs_sbi_read(struct exofs_io_state *ios)
-{
- int i;
- int ret;
-
- ret = _prepare_for_striping(ios);
- if (unlikely(ret))
- return ret;
-
- for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
- ret = _sbi_read_mirror(ios, i);
- if (unlikely(ret))
- return ret;
- }
-
- ret = exofs_io_execute(ios);
- return ret;
-}
-
-int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr)
-{
- struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
- void *iter = NULL;
- int nelem;
-
- do {
- nelem = 1;
- osd_req_decode_get_attr_list(ios->per_dev[0].or,
- &cur_attr, &nelem, &iter);
- if ((cur_attr.attr_page == attr->attr_page) &&
- (cur_attr.attr_id == attr->attr_id)) {
- attr->len = cur_attr.len;
- attr->val_ptr = cur_attr.val_ptr;
- return 0;
- }
- } while (iter);
-
- return -EIO;
-}
-
-static int _truncate_mirrors(struct exofs_io_state *ios, unsigned cur_comp,
- struct osd_attr *attr)
-{
- int last_comp = cur_comp + ios->layout->mirrors_p1;
-
- for (; cur_comp < last_comp; ++cur_comp) {
- struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp];
- struct osd_request *or;
-
- or = osd_start_request(exofs_ios_od(ios, cur_comp), GFP_KERNEL);
- if (unlikely(!or)) {
- EXOFS_ERR("%s: osd_start_request failed\n", __func__);
- return -ENOMEM;
- }
- per_dev->or = or;
-
- osd_req_set_attributes(or, &ios->obj);
- osd_req_add_set_attr_list(or, attr, 1);
- }
-
- return 0;
-}
-
-int exofs_oi_truncate(struct exofs_i_info *oi, u64 size)
-{
- struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info;
- struct exofs_io_state *ios;
- struct exofs_trunc_attr {
- struct osd_attr attr;
- __be64 newsize;
- } *size_attrs;
- struct _striping_info si;
- int i, ret;
-
- ret = exofs_get_io_state(&sbi->layout, &ios);
- if (unlikely(ret))
- return ret;
-
- size_attrs = kcalloc(ios->layout->group_width, sizeof(*size_attrs),
- GFP_KERNEL);
- if (unlikely(!size_attrs)) {
- ret = -ENOMEM;
- goto out;
- }
-
- ios->obj.id = exofs_oi_objno(oi);
- ios->cred = oi->i_cred;
-
- ios->numdevs = ios->layout->s_numdevs;
- _calc_stripe_info(ios, size, &si);
-
- for (i = 0; i < ios->layout->group_width; ++i) {
- struct exofs_trunc_attr *size_attr = &size_attrs[i];
- u64 obj_size;
-
- if (i < si.dev)
- obj_size = si.obj_offset +
- ios->layout->stripe_unit - si.unit_off;
- else if (i == si.dev)
- obj_size = si.obj_offset;
- else /* i > si.dev */
- obj_size = si.obj_offset - si.unit_off;
-
- size_attr->newsize = cpu_to_be64(obj_size);
- size_attr->attr = g_attr_logical_length;
- size_attr->attr.val_ptr = &size_attr->newsize;
-
- ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1,
- &size_attr->attr);
- if (unlikely(ret))
- goto out;
- }
- ret = exofs_io_execute(ios);
-
-out:
- kfree(size_attrs);
- exofs_put_io_state(ios);
- return ret;
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:26:34 +0000