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* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/llite/dir.c
*
* Directory code for lustre client.
*/
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/mm.h>
#include <linux/version.h>
#include <asm/uaccess.h>
#include <linux/buffer_head.h> // for wait_on_buffer
#include <linux/pagevec.h>
#define DEBUG_SUBSYSTEM S_LLITE
#include <lustre/lustre_idl.h>
#include <obd_support.h>
#include <obd_class.h>
#include <lustre_lib.h>
#include <lustre/lustre_idl.h>
#include <lustre_lite.h>
#include <lustre_dlm.h>
#include <lustre_fid.h>
#include "llite_internal.h"
/*
* (new) readdir implementation overview.
*
* Original lustre readdir implementation cached exact copy of raw directory
* pages on the client. These pages were indexed in client page cache by
* logical offset in the directory file. This design, while very simple and
* intuitive had some inherent problems:
*
* . it implies that byte offset to the directory entry serves as a
* telldir(3)/seekdir(3) cookie, but that offset is not stable: in
* ext3/htree directory entries may move due to splits, and more
* importantly,
*
* . it is incompatible with the design of split directories for cmd3,
* that assumes that names are distributed across nodes based on their
* hash, and so readdir should be done in hash order.
*
* New readdir implementation does readdir in hash order, and uses hash of a
* file name as a telldir/seekdir cookie. This led to number of complications:
*
* . hash is not unique, so it cannot be used to index cached directory
* pages on the client (note, that it requires a whole pageful of hash
* collided entries to cause two pages to have identical hashes);
*
* . hash is not unique, so it cannot, strictly speaking, be used as an
* entry cookie. ext3/htree has the same problem and lustre implementation
* mimics their solution: seekdir(hash) positions directory at the first
* entry with the given hash.
*
* Client side.
*
* 0. caching
*
* Client caches directory pages using hash of the first entry as an index. As
* noted above hash is not unique, so this solution doesn't work as is:
* special processing is needed for "page hash chains" (i.e., sequences of
* pages filled with entries all having the same hash value).
*
* First, such chains have to be detected. To this end, server returns to the
* client the hash of the first entry on the page next to one returned. When
* client detects that this hash is the same as hash of the first entry on the
* returned page, page hash collision has to be handled. Pages in the
* hash chain, except first one, are termed "overflow pages".
*
* Solution to index uniqueness problem is to not cache overflow
* pages. Instead, when page hash collision is detected, all overflow pages
* from emerging chain are immediately requested from the server and placed in
* a special data structure (struct ll_dir_chain). This data structure is used
* by ll_readdir() to process entries from overflow pages. When readdir
* invocation finishes, overflow pages are discarded. If page hash collision
* chain weren't completely processed, next call to readdir will again detect
* page hash collision, again read overflow pages in, process next portion of
* entries and again discard the pages. This is not as wasteful as it looks,
* because, given reasonable hash, page hash collisions are extremely rare.
*
* 1. directory positioning
*
* When seekdir(hash) is called, original
*
*
*
*
*
*
*
*
* Server.
*
* identification of and access to overflow pages
*
* page format
*
* Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
* a header lu_dirpage which describes the start/end hash, and whether this
* page is empty (contains no dir entry) or hash collide with next page.
* After client receives reply, several pages will be integrated into dir page
* in PAGE_CACHE_SIZE (if PAGE_CACHE_SIZE greater than LU_PAGE_SIZE), and the
* lu_dirpage for this integrated page will be adjusted. See
* lmv_adjust_dirpages().
*
*/
/* returns the page unlocked, but with a reference */
static int ll_dir_filler(void *_hash, struct page *page0)
{
struct inode *inode = page0->mapping->host;
int hash64 = ll_i2sbi(inode)->ll_flags & LL_SBI_64BIT_HASH;
struct obd_export *exp = ll_i2sbi(inode)->ll_md_exp;
struct ptlrpc_request *request;
struct mdt_body *body;
struct md_op_data *op_data;
__u64 hash = *((__u64 *)_hash);
struct page **page_pool;
struct page *page;
struct lu_dirpage *dp;
int max_pages = ll_i2sbi(inode)->ll_md_brw_size >> PAGE_CACHE_SHIFT;
int nrdpgs = 0; /* number of pages read actually */
int npages;
int i;
int rc;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) hash "LPU64"\n",
inode->i_ino, inode->i_generation, inode, hash);
LASSERT(max_pages > 0 && max_pages <= MD_MAX_BRW_PAGES);
OBD_ALLOC(page_pool, sizeof(page) * max_pages);
if (page_pool != NULL) {
page_pool[0] = page0;
} else {
page_pool = &page0;
max_pages = 1;
}
for (npages = 1; npages < max_pages; npages++) {
page = page_cache_alloc_cold(inode->i_mapping);
if (!page)
break;
page_pool[npages] = page;
}
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
LUSTRE_OPC_ANY, NULL);
op_data->op_npages = npages;
op_data->op_offset = hash;
rc = md_readpage(exp, op_data, page_pool, &request);
ll_finish_md_op_data(op_data);
if (rc == 0) {
body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
/* Checked by mdc_readpage() */
LASSERT(body != NULL);
if (body->valid & OBD_MD_FLSIZE)
cl_isize_write(inode, body->size);
nrdpgs = (request->rq_bulk->bd_nob_transferred+PAGE_CACHE_SIZE-1)
>> PAGE_CACHE_SHIFT;
SetPageUptodate(page0);
}
unlock_page(page0);
ptlrpc_req_finished(request);
CDEBUG(D_VFSTRACE, "read %d/%d pages\n", nrdpgs, npages);
ll_pagevec_init(&lru_pvec, 0);
for (i = 1; i < npages; i++) {
unsigned long offset;
int ret;
page = page_pool[i];
if (rc < 0 || i >= nrdpgs) {
page_cache_release(page);
continue;
}
SetPageUptodate(page);
dp = kmap(page);
hash = le64_to_cpu(dp->ldp_hash_start);
kunmap(page);
offset = hash_x_index(hash, hash64);
prefetchw(&page->flags);
ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
GFP_KERNEL);
if (ret == 0) {
unlock_page(page);
if (ll_pagevec_add(&lru_pvec, page) == 0)
ll_pagevec_lru_add_file(&lru_pvec);
} else {
CDEBUG(D_VFSTRACE, "page %lu add to page cache failed:"
" %d\n", offset, ret);
}
page_cache_release(page);
}
ll_pagevec_lru_add_file(&lru_pvec);
if (page_pool != &page0)
OBD_FREE(page_pool, sizeof(struct page *) * max_pages);
EXIT;
return rc;
}
static void ll_check_page(struct inode *dir, struct page *page)
{
/* XXX: check page format later */
SetPageChecked(page);
}
void ll_release_page(struct page *page, int remove)
{
kunmap(page);
if (remove) {
lock_page(page);
if (likely(page->mapping != NULL))
truncate_complete_page(page->mapping, page);
unlock_page(page);
}
page_cache_release(page);
}
/*
* Find, kmap and return page that contains given hash.
*/
static struct page *ll_dir_page_locate(struct inode *dir, __u64 *hash,
__u64 *start, __u64 *end)
{
int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
struct address_space *mapping = dir->i_mapping;
/*
* Complement of hash is used as an index so that
* radix_tree_gang_lookup() can be used to find a page with starting
* hash _smaller_ than one we are looking for.
*/
unsigned long offset = hash_x_index(*hash, hash64);
struct page *page;
int found;
TREE_READ_LOCK_IRQ(mapping);
found = radix_tree_gang_lookup(&mapping->page_tree,
(void **)&page, offset, 1);
if (found > 0) {
struct lu_dirpage *dp;
page_cache_get(page);
TREE_READ_UNLOCK_IRQ(mapping);
/*
* In contrast to find_lock_page() we are sure that directory
* page cannot be truncated (while DLM lock is held) and,
* hence, can avoid restart.
*
* In fact, page cannot be locked here at all, because
* ll_dir_filler() does synchronous io.
*/
wait_on_page_locked(page);
if (PageUptodate(page)) {
dp = kmap(page);
if (BITS_PER_LONG == 32 && hash64) {
*start = le64_to_cpu(dp->ldp_hash_start) >> 32;
*end = le64_to_cpu(dp->ldp_hash_end) >> 32;
*hash = *hash >> 32;
} else {
*start = le64_to_cpu(dp->ldp_hash_start);
*end = le64_to_cpu(dp->ldp_hash_end);
}
LASSERTF(*start <= *hash, "start = "LPX64",end = "
LPX64",hash = "LPX64"\n", *start, *end, *hash);
CDEBUG(D_VFSTRACE, "page %lu [%llu %llu], hash "LPU64"\n",
offset, *start, *end, *hash);
if (*hash > *end) {
ll_release_page(page, 0);
page = NULL;
} else if (*end != *start && *hash == *end) {
/*
* upon hash collision, remove this page,
* otherwise put page reference, and
* ll_get_dir_page() will issue RPC to fetch
* the page we want.
*/
ll_release_page(page,
le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
page = NULL;
}
} else {
page_cache_release(page);
page = ERR_PTR(-EIO);
}
} else {
TREE_READ_UNLOCK_IRQ(mapping);
page = NULL;
}
return page;
}
struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
struct ll_dir_chain *chain)
{
ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
struct address_space *mapping = dir->i_mapping;
struct lustre_handle lockh;
struct lu_dirpage *dp;
struct page *page;
ldlm_mode_t mode;
int rc;
__u64 start = 0;
__u64 end = 0;
__u64 lhash = hash;
struct ll_inode_info *lli = ll_i2info(dir);
int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
mode = LCK_PR;
rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
if (!rc) {
struct ldlm_enqueue_info einfo = {.ei_type = LDLM_IBITS,
.ei_mode = mode,
.ei_cb_bl =
ll_md_blocking_ast,
.ei_cb_cp =
ldlm_completion_ast,
.ei_cb_gl = NULL,
.ei_cb_wg = NULL,
.ei_cbdata = NULL};
struct lookup_intent it = { .it_op = IT_READDIR };
struct ptlrpc_request *request;
struct md_op_data *op_data;
op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
LUSTRE_OPC_ANY, NULL);
if (IS_ERR(op_data))
return (void *)op_data;
rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
op_data, &lockh, NULL, 0, NULL, 0);
ll_finish_md_op_data(op_data);
request = (struct ptlrpc_request *)it.d.lustre.it_data;
if (request)
ptlrpc_req_finished(request);
if (rc < 0) {
CERROR("lock enqueue: "DFID" at "LPU64": rc %d\n",
PFID(ll_inode2fid(dir)), hash, rc);
return ERR_PTR(rc);
}
CDEBUG(D_INODE, "setting lr_lvb_inode to inode %p (%lu/%u)\n",
dir, dir->i_ino, dir->i_generation);
md_set_lock_data(ll_i2sbi(dir)->ll_md_exp,
&it.d.lustre.it_lock_handle, dir, NULL);
} else {
/* for cross-ref object, l_ast_data of the lock may not be set,
* we reset it here */
md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
dir, NULL);
}
ldlm_lock_dump_handle(D_OTHER, &lockh);
mutex_lock(&lli->lli_readdir_mutex);
page = ll_dir_page_locate(dir, &lhash, &start, &end);
if (IS_ERR(page)) {
CERROR("dir page locate: "DFID" at "LPU64": rc %ld\n",
PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
GOTO(out_unlock, page);
} else if (page != NULL) {
/*
* XXX nikita: not entirely correct handling of a corner case:
* suppose hash chain of entries with hash value HASH crosses
* border between pages P0 and P1. First both P0 and P1 are
* cached, seekdir() is called for some entry from the P0 part
* of the chain. Later P0 goes out of cache. telldir(HASH)
* happens and finds P1, as it starts with matching hash
* value. Remaining entries from P0 part of the chain are
* skipped. (Is that really a bug?)
*
* Possible solutions: 0. don't cache P1 is such case, handle
* it as an "overflow" page. 1. invalidate all pages at
* once. 2. use HASH|1 as an index for P1.
*/
GOTO(hash_collision, page);
}
page = read_cache_page(mapping, hash_x_index(hash, hash64),
ll_dir_filler, &lhash);
if (IS_ERR(page)) {
CERROR("read cache page: "DFID" at "LPU64": rc %ld\n",
PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
GOTO(out_unlock, page);
}
wait_on_page_locked(page);
(void)kmap(page);
if (!PageUptodate(page)) {
CERROR("page not updated: "DFID" at "LPU64": rc %d\n",
PFID(ll_inode2fid(dir)), hash, -5);
goto fail;
}
if (!PageChecked(page))
ll_check_page(dir, page);
if (PageError(page)) {
CERROR("page error: "DFID" at "LPU64": rc %d\n",
PFID(ll_inode2fid(dir)), hash, -5);
goto fail;
}
hash_collision:
dp = page_address(page);
if (BITS_PER_LONG == 32 && hash64) {
start = le64_to_cpu(dp->ldp_hash_start) >> 32;
end = le64_to_cpu(dp->ldp_hash_end) >> 32;
lhash = hash >> 32;
} else {
start = le64_to_cpu(dp->ldp_hash_start);
end = le64_to_cpu(dp->ldp_hash_end);
lhash = hash;
}
if (end == start) {
LASSERT(start == lhash);
CWARN("Page-wide hash collision: "LPU64"\n", end);
if (BITS_PER_LONG == 32 && hash64)
CWARN("Real page-wide hash collision at ["LPU64" "LPU64
"] with hash "LPU64"\n",
le64_to_cpu(dp->ldp_hash_start),
le64_to_cpu(dp->ldp_hash_end), hash);
/*
* Fetch whole overflow chain...
*
* XXX not yet.
*/
goto fail;
}
out_unlock:
mutex_unlock(&lli->lli_readdir_mutex);
ldlm_lock_decref(&lockh, mode);
return page;
fail:
ll_release_page(page, 1);
page = ERR_PTR(-EIO);
goto out_unlock;
}
int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie,
filldir_t filldir)
{
struct ll_inode_info *info = ll_i2info(inode);
struct ll_sb_info *sbi = ll_i2sbi(inode);
__u64 pos = *_pos;
int api32 = ll_need_32bit_api(sbi);
int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
struct page *page;
struct ll_dir_chain chain;
int done = 0;
int rc = 0;
ENTRY;
ll_dir_chain_init(&chain);
page = ll_get_dir_page(inode, pos, &chain);
while (rc == 0 && !done) {
struct lu_dirpage *dp;
struct lu_dirent *ent;
if (!IS_ERR(page)) {
/*
* If page is empty (end of directory is reached),
* use this value.
*/
__u64 hash = MDS_DIR_END_OFF;
__u64 next;
dp = page_address(page);
for (ent = lu_dirent_start(dp); ent != NULL && !done;
ent = lu_dirent_next(ent)) {
__u16 type;
int namelen;
struct lu_fid fid;
__u64 lhash;
__u64 ino;
/*
* XXX: implement correct swabbing here.
*/
hash = le64_to_cpu(ent->lde_hash);
if (hash < pos)
/*
* Skip until we find target hash
* value.
*/
continue;
namelen = le16_to_cpu(ent->lde_namelen);
if (namelen == 0)
/*
* Skip dummy record.
*/
continue;
if (api32 && hash64)
lhash = hash >> 32;
else
lhash = hash;
fid_le_to_cpu(&fid, &ent->lde_fid);
ino = cl_fid_build_ino(&fid, api32);
type = ll_dirent_type_get(ent);
/* For 'll_nfs_get_name_filldir()', it will try
* to access the 'ent' through its 'lde_name',
* so the parameter 'name' for 'filldir()' must
* be part of the 'ent'. */
done = filldir(cookie, ent->lde_name, namelen,
lhash, ino, type);
}
next = le64_to_cpu(dp->ldp_hash_end);
if (!done) {
pos = next;
if (pos == MDS_DIR_END_OFF) {
/*
* End of directory reached.
*/
done = 1;
ll_release_page(page, 0);
} else if (1 /* chain is exhausted*/) {
/*
* Normal case: continue to the next
* page.
*/
ll_release_page(page,
le32_to_cpu(dp->ldp_flags) &
LDF_COLLIDE);
next = pos;
page = ll_get_dir_page(inode, pos,
&chain);
} else {
/*
* go into overflow page.
*/
LASSERT(le32_to_cpu(dp->ldp_flags) &
LDF_COLLIDE);
ll_release_page(page, 1);
}
} else {
pos = hash;
ll_release_page(page, 0);
}
} else {
rc = PTR_ERR(page);
CERROR("error reading dir "DFID" at %lu: rc %d\n",
PFID(&info->lli_fid), (unsigned long)pos, rc);
}
}
*_pos = pos;
ll_dir_chain_fini(&chain);
RETURN(rc);
}
static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
struct ll_file_data *lfd = LUSTRE_FPRIVATE(filp);
struct ll_sb_info *sbi = ll_i2sbi(inode);
__u64 pos = lfd->lfd_pos;
int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
int api32 = ll_need_32bit_api(sbi);
int rc;
struct path path;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu "
" 32bit_api %d\n", inode->i_ino, inode->i_generation,
inode, (unsigned long)pos, i_size_read(inode), api32);
if (pos == MDS_DIR_END_OFF)
/*
* end-of-file.
*/
GOTO(out, rc = 0);
rc = ll_dir_read(inode, &pos, cookie, filldir);
lfd->lfd_pos = pos;
if (pos == MDS_DIR_END_OFF) {
if (api32)
filp->f_pos = LL_DIR_END_OFF_32BIT;
else
filp->f_pos = LL_DIR_END_OFF;
} else {
if (api32 && hash64)
filp->f_pos = pos >> 32;
else
filp->f_pos = pos;
}
filp->f_version = inode->i_version;
path.mnt = filp->f_path.mnt;
path.dentry = filp->f_dentry;
touch_atime(&path);
out:
if (!rc)
ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
RETURN(rc);
}
int ll_send_mgc_param(struct obd_export *mgc, char *string)
{
struct mgs_send_param *msp;
int rc = 0;
OBD_ALLOC_PTR(msp);
if (!msp)
return -ENOMEM;
strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
sizeof(struct mgs_send_param), msp, NULL);
if (rc)
CERROR("Failed to set parameter: %d\n", rc);
OBD_FREE_PTR(msp);
return rc;
}
int ll_dir_setdirstripe(struct inode *dir, struct lmv_user_md *lump,
char *filename)
{
struct ptlrpc_request *request = NULL;
struct md_op_data *op_data;
struct ll_sb_info *sbi = ll_i2sbi(dir);
int mode;
int err;
ENTRY;
mode = (0755 & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
op_data = ll_prep_md_op_data(NULL, dir, NULL, filename,
strlen(filename), mode, LUSTRE_OPC_MKDIR,
lump);
if (IS_ERR(op_data))
GOTO(err_exit, err = PTR_ERR(op_data));
op_data->op_cli_flags |= CLI_SET_MEA;
err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
current_fsuid(), current_fsgid(),
cfs_curproc_cap_pack(), 0, &request);
ll_finish_md_op_data(op_data);
if (err)
GOTO(err_exit, err);
err_exit:
ptlrpc_req_finished(request);
return err;
}
int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
int set_default)
{
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct md_op_data *op_data;
struct ptlrpc_request *req = NULL;
int rc = 0;
struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
struct obd_device *mgc = lsi->lsi_mgc;
int lum_size;
ENTRY;
if (lump != NULL) {
/*
* This is coming from userspace, so should be in
* local endian. But the MDS would like it in little
* endian, so we swab it before we send it.
*/
switch (lump->lmm_magic) {
case LOV_USER_MAGIC_V1: {
if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
lustre_swab_lov_user_md_v1(lump);
lum_size = sizeof(struct lov_user_md_v1);
break;
}
case LOV_USER_MAGIC_V3: {
if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
lustre_swab_lov_user_md_v3(
(struct lov_user_md_v3 *)lump);
lum_size = sizeof(struct lov_user_md_v3);
break;
}
default: {
CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
" %#08x != %#08x nor %#08x\n",
lump->lmm_magic, LOV_USER_MAGIC_V1,
LOV_USER_MAGIC_V3);
RETURN(-EINVAL);
}
}
} else {
lum_size = sizeof(struct lov_user_md_v1);
}
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
LUSTRE_OPC_ANY, NULL);
if (IS_ERR(op_data))
RETURN(PTR_ERR(op_data));
if (lump != NULL && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
op_data->op_cli_flags |= CLI_SET_MEA;
/* swabbing is done in lov_setstripe() on server side */
rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
NULL, 0, &req, NULL);
ll_finish_md_op_data(op_data);
ptlrpc_req_finished(req);
if (rc) {
if (rc != -EPERM && rc != -EACCES)
CERROR("mdc_setattr fails: rc = %d\n", rc);
}
/* In the following we use the fact that LOV_USER_MAGIC_V1 and
LOV_USER_MAGIC_V3 have the same initial fields so we do not
need the make the distiction between the 2 versions */
if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
char *param = NULL;
char *buf;
OBD_ALLOC(param, MGS_PARAM_MAXLEN);
if (param == NULL)
GOTO(end, rc = -ENOMEM);
buf = param;
/* Get fsname and assume devname to be -MDT0000. */
ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
strcat(buf, "-MDT0000.lov");
buf += strlen(buf);
/* Set root stripesize */
sprintf(buf, ".stripesize=%u",
lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
if (rc)
GOTO(end, rc);
/* Set root stripecount */
sprintf(buf, ".stripecount=%hd",
lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
if (rc)
GOTO(end, rc);
/* Set root stripeoffset */
sprintf(buf, ".stripeoffset=%hd",
lump ? le16_to_cpu(lump->lmm_stripe_offset) :
(typeof(lump->lmm_stripe_offset))(-1));
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
end:
if (param != NULL)
OBD_FREE(param, MGS_PARAM_MAXLEN);
}
RETURN(rc);
}
int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
int *lmm_size, struct ptlrpc_request **request)
{
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct mdt_body *body;
struct lov_mds_md *lmm = NULL;
struct ptlrpc_request *req = NULL;
int rc, lmmsize;
struct md_op_data *op_data;
rc = ll_get_max_mdsize(sbi, &lmmsize);
if (rc)
RETURN(rc);
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
0, lmmsize, LUSTRE_OPC_ANY,
NULL);
if (IS_ERR(op_data))
RETURN(PTR_ERR(op_data));
op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
rc = md_getattr(sbi->ll_md_exp, op_data, &req);
ll_finish_md_op_data(op_data);
if (rc < 0) {
CDEBUG(D_INFO, "md_getattr failed on inode "
"%lu/%u: rc %d\n", inode->i_ino,
inode->i_generation, rc);
GOTO(out, rc);
}
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
lmmsize = body->eadatasize;
if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
lmmsize == 0) {
GOTO(out, rc = -ENODATA);
}
lmm = req_capsule_server_sized_get(&req->rq_pill,
&RMF_MDT_MD, lmmsize);
LASSERT(lmm != NULL);
/*
* This is coming from the MDS, so is probably in
* little endian. We convert it to host endian before
* passing it to userspace.
*/
/* We don't swab objects for directories */
switch (le32_to_cpu(lmm->lmm_magic)) {
case LOV_MAGIC_V1:
if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
break;
case LOV_MAGIC_V3:
if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
break;
default:
CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
rc = -EPROTO;
}
out:
*lmmp = lmm;
*lmm_size = lmmsize;
*request = req;
return rc;
}
/*
* Get MDT index for the inode.
*/
int ll_get_mdt_idx(struct inode *inode)
{
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct md_op_data *op_data;
int rc, mdtidx;
ENTRY;
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
0, LUSTRE_OPC_ANY, NULL);
if (IS_ERR(op_data))
RETURN(PTR_ERR(op_data));
op_data->op_flags |= MF_GET_MDT_IDX;
rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
mdtidx = op_data->op_mds;
ll_finish_md_op_data(op_data);
if (rc < 0) {
CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
RETURN(rc);
}
return mdtidx;
}
/**
* Generic handler to do any pre-copy work.
*
* It send a first hsm_progress (with extent length == 0) to coordinator as a
* first information for it that real work has started.
*
* Moreover, for a ARCHIVE request, it will sample the file data version and
* store it in \a copy.
*
* \return 0 on success.
*/
static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
{
struct ll_sb_info *sbi = ll_s2sbi(sb);
struct hsm_progress_kernel hpk;
int rc;
ENTRY;
/* Forge a hsm_progress based on data from copy. */
hpk.hpk_fid = copy->hc_hai.hai_fid;
hpk.hpk_cookie = copy->hc_hai.hai_cookie;
hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
hpk.hpk_extent.length = 0;
hpk.hpk_flags = 0;
hpk.hpk_errval = 0;
hpk.hpk_data_version = 0;
/* For archive request, we need to read the current file version. */
if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
struct inode *inode;
__u64 data_version = 0;
/* Get inode for this fid */
inode = search_inode_for_lustre(sb, ©->hc_hai.hai_fid);
if (IS_ERR(inode)) {
hpk.hpk_flags |= HP_FLAG_RETRY;
/* hpk_errval is >= 0 */
hpk.hpk_errval = -PTR_ERR(inode);
GOTO(progress, rc = PTR_ERR(inode));
}
/* Read current file data version */
rc = ll_data_version(inode, &data_version, 1);
iput(inode);
if (rc != 0) {
CDEBUG(D_HSM, "Could not read file data version of "
DFID" (rc = %d). Archive request ("
LPX64") could not be done.\n",
PFID(©->hc_hai.hai_fid), rc,
copy->hc_hai.hai_cookie);
hpk.hpk_flags |= HP_FLAG_RETRY;
/* hpk_errval must be >= 0 */
hpk.hpk_errval = -rc;
GOTO(progress, rc);
}
/* Store it the hsm_copy for later copytool use.
* Always modified even if no lsm. */
copy->hc_data_version = data_version;
}
progress:
rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
&hpk, NULL);
RETURN(rc);
}
/**
* Generic handler to do any post-copy work.
*
* It will send the last hsm_progress update to coordinator to inform it
* that copy is finished and whether it was successful or not.
*
* Moreover,
* - for ARCHIVE request, it will sample the file data version and compare it
* with the version saved in ll_ioc_copy_start(). If they do not match, copy
* will be considered as failed.
* - for RESTORE request, it will sample the file data version and send it to
* coordinator which is useful if the file was imported as 'released'.
*
* \return 0 on success.
*/
static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
{
struct ll_sb_info *sbi = ll_s2sbi(sb);
struct hsm_progress_kernel hpk;
int rc;
ENTRY;
/* If you modify the logic here, also check llapi_hsm_copy_end(). */
/* Take care: copy->hc_hai.hai_action, len, gid and data are not
* initialized if copy_end was called with copy == NULL.
*/
/* Forge a hsm_progress based on data from copy. */
hpk.hpk_fid = copy->hc_hai.hai_fid;
hpk.hpk_cookie = copy->hc_hai.hai_cookie;
hpk.hpk_extent = copy->hc_hai.hai_extent;
hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
hpk.hpk_errval = copy->hc_errval;
hpk.hpk_data_version = 0;
/* For archive request, we need to check the file data was not changed.
*
* For restore request, we need to send the file data version, this is
* useful when the file was created using hsm_import.
*/
if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
(copy->hc_hai.hai_action == HSMA_RESTORE)) &&
(copy->hc_errval == 0)) {
struct inode *inode;
__u64 data_version = 0;
/* Get lsm for this fid */
inode = search_inode_for_lustre(sb, ©->hc_hai.hai_fid);
if (IS_ERR(inode)) {
hpk.hpk_flags |= HP_FLAG_RETRY;
/* hpk_errval must be >= 0 */
hpk.hpk_errval = -PTR_ERR(inode);
GOTO(progress, rc = PTR_ERR(inode));
}
rc = ll_data_version(inode, &data_version,
copy->hc_hai.hai_action == HSMA_ARCHIVE);
iput(inode);
if (rc) {
CDEBUG(D_HSM, "Could not read file data version. "
"Request could not be confirmed.\n");
if (hpk.hpk_errval == 0)
hpk.hpk_errval = -rc;
GOTO(progress, rc);
}
/* Store it the hsm_copy for later copytool use.
* Always modified even if no lsm. */
hpk.hpk_data_version = data_version;
/* File could have been stripped during archiving, so we need
* to check anyway. */
if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
(copy->hc_data_version != data_version)) {
CDEBUG(D_HSM, "File data version mismatched. "
"File content was changed during archiving. "
DFID", start:"LPX64" current:"LPX64"\n",
PFID(©->hc_hai.hai_fid),
copy->hc_data_version, data_version);
/* File was changed, send error to cdt. Do not ask for
* retry because if a file is modified frequently,
* the cdt will loop on retried archive requests.
* The policy engine will ask for a new archive later
* when the file will not be modified for some tunable
* time */
/* we do not notify caller */
hpk.hpk_flags &= ~HP_FLAG_RETRY;
/* hpk_errval must be >= 0 */
hpk.hpk_errval = EBUSY;
}
}
progress:
rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
&hpk, NULL);
RETURN(rc);
}
static int copy_and_ioctl(int cmd, struct obd_export *exp, void *data, int len)
{
void *ptr;
int rc;
OBD_ALLOC(ptr, len);
if (ptr == NULL)
return -ENOMEM;
if (copy_from_user(ptr, data, len)) {
OBD_FREE(ptr, len);
return -EFAULT;
}
rc = obd_iocontrol(cmd, exp, len, data, NULL);
OBD_FREE(ptr, len);
return rc;
}
static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
{
int cmd = qctl->qc_cmd;
int type = qctl->qc_type;
int id = qctl->qc_id;
int valid = qctl->qc_valid;
int rc = 0;
ENTRY;
switch (cmd) {
case LUSTRE_Q_INVALIDATE:
case LUSTRE_Q_FINVALIDATE:
case Q_QUOTAON:
case Q_QUOTAOFF:
case Q_SETQUOTA:
case Q_SETINFO:
if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
sbi->ll_flags & LL_SBI_RMT_CLIENT)
RETURN(-EPERM);
break;
case Q_GETQUOTA:
if (((type == USRQUOTA && current_euid() != id) ||
(type == GRPQUOTA && !in_egroup_p(id))) &&
(!cfs_capable(CFS_CAP_SYS_ADMIN) ||
sbi->ll_flags & LL_SBI_RMT_CLIENT))
RETURN(-EPERM);
break;
case Q_GETINFO:
break;
default:
CERROR("unsupported quotactl op: %#x\n", cmd);
RETURN(-ENOTTY);
}
if (valid != QC_GENERAL) {
if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
RETURN(-EOPNOTSUPP);
if (cmd == Q_GETINFO)
qctl->qc_cmd = Q_GETOINFO;
else if (cmd == Q_GETQUOTA)
qctl->qc_cmd = Q_GETOQUOTA;
else
RETURN(-EINVAL);
switch (valid) {
case QC_MDTIDX:
rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
sizeof(*qctl), qctl, NULL);
break;
case QC_OSTIDX:
rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
sizeof(*qctl), qctl, NULL);
break;
case QC_UUID:
rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
sizeof(*qctl), qctl, NULL);
if (rc == -EAGAIN)
rc = obd_iocontrol(OBD_IOC_QUOTACTL,
sbi->ll_dt_exp,
sizeof(*qctl), qctl, NULL);
break;
default:
rc = -EINVAL;
break;
}
if (rc)
RETURN(rc);
qctl->qc_cmd = cmd;
} else {
struct obd_quotactl *oqctl;
OBD_ALLOC_PTR(oqctl);
if (oqctl == NULL)
RETURN(-ENOMEM);
QCTL_COPY(oqctl, qctl);
rc = obd_quotactl(sbi->ll_md_exp, oqctl);
if (rc) {
if (rc != -EALREADY && cmd == Q_QUOTAON) {
oqctl->qc_cmd = Q_QUOTAOFF;
obd_quotactl(sbi->ll_md_exp, oqctl);
}
OBD_FREE_PTR(oqctl);
RETURN(rc);
}
/* If QIF_SPACE is not set, client should collect the
* space usage from OSSs by itself */
if (cmd == Q_GETQUOTA &&
!(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
!oqctl->qc_dqblk.dqb_curspace) {
struct obd_quotactl *oqctl_tmp;
OBD_ALLOC_PTR(oqctl_tmp);
if (oqctl_tmp == NULL)
GOTO(out, rc = -ENOMEM);
oqctl_tmp->qc_cmd = Q_GETOQUOTA;
oqctl_tmp->qc_id = oqctl->qc_id;
oqctl_tmp->qc_type = oqctl->qc_type;
/* collect space usage from OSTs */
oqctl_tmp->qc_dqblk.dqb_curspace = 0;
rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
if (!rc || rc == -EREMOTEIO) {
oqctl->qc_dqblk.dqb_curspace =
oqctl_tmp->qc_dqblk.dqb_curspace;
oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
}
/* collect space & inode usage from MDTs */
oqctl_tmp->qc_dqblk.dqb_curspace = 0;
oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
if (!rc || rc == -EREMOTEIO) {
oqctl->qc_dqblk.dqb_curspace +=
oqctl_tmp->qc_dqblk.dqb_curspace;
oqctl->qc_dqblk.dqb_curinodes =
oqctl_tmp->qc_dqblk.dqb_curinodes;
oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
} else {
oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
}
OBD_FREE_PTR(oqctl_tmp);
}
out:
QCTL_COPY(qctl, oqctl);
OBD_FREE_PTR(oqctl);
}
RETURN(rc);
}
static char *
ll_getname(const char __user *filename)
{
int ret = 0, len;
char *tmp = __getname();
if (!tmp)
return ERR_PTR(-ENOMEM);
len = strncpy_from_user(tmp, filename, PATH_MAX);
if (len == 0)
ret = -ENOENT;
else if (len > PATH_MAX)
ret = -ENAMETOOLONG;
if (ret) {
__putname(tmp);
tmp = ERR_PTR(ret);
}
return tmp;
}
#define ll_putname(filename) __putname(filename)
static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file->f_dentry->d_inode;
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct obd_ioctl_data *data;
int rc = 0;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
inode->i_ino, inode->i_generation, inode, cmd);
/* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
return -ENOTTY;
ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
switch(cmd) {
case FSFILT_IOC_GETFLAGS:
case FSFILT_IOC_SETFLAGS:
RETURN(ll_iocontrol(inode, file, cmd, arg));
case FSFILT_IOC_GETVERSION_OLD:
case FSFILT_IOC_GETVERSION:
RETURN(put_user(inode->i_generation, (int *)arg));
/* We need to special case any other ioctls we want to handle,
* to send them to the MDS/OST as appropriate and to properly
* network encode the arg field.
case FSFILT_IOC_SETVERSION_OLD:
case FSFILT_IOC_SETVERSION:
*/
case LL_IOC_GET_MDTIDX: {
int mdtidx;
mdtidx = ll_get_mdt_idx(inode);
if (mdtidx < 0)
RETURN(mdtidx);
if (put_user((int)mdtidx, (int*)arg))
RETURN(-EFAULT);
return 0;
}
case IOC_MDC_LOOKUP: {
struct ptlrpc_request *request = NULL;
int namelen, len = 0;
char *buf = NULL;
char *filename;
struct md_op_data *op_data;
rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
if (rc)
RETURN(rc);
data = (void *)buf;
filename = data->ioc_inlbuf1;
namelen = strlen(filename);
if (namelen < 1) {
CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
GOTO(out_free, rc = -EINVAL);
}
op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
0, LUSTRE_OPC_ANY, NULL);
if (IS_ERR(op_data))
GOTO(out_free, rc = PTR_ERR(op_data));
op_data->op_valid = OBD_MD_FLID;
rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
ll_finish_md_op_data(op_data);
if (rc < 0) {
CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
GOTO(out_free, rc);
}
ptlrpc_req_finished(request);
EXIT;
out_free:
obd_ioctl_freedata(buf, len);
return rc;
}
case LL_IOC_LMV_SETSTRIPE: {
struct lmv_user_md *lum;
char *buf = NULL;
char *filename;
int namelen = 0;
int lumlen = 0;
int len;
int rc;
rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
if (rc)
RETURN(rc);
data = (void *)buf;
if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
GOTO(lmv_out_free, rc = -EINVAL);
filename = data->ioc_inlbuf1;
namelen = data->ioc_inllen1;
if (namelen < 1) {
CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
GOTO(lmv_out_free, rc = -EINVAL);
}
lum = (struct lmv_user_md *)data->ioc_inlbuf2;
lumlen = data->ioc_inllen2;
if (lum->lum_magic != LMV_USER_MAGIC ||
lumlen != sizeof(*lum)) {
CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
filename, lum->lum_magic, lumlen, -EFAULT);
GOTO(lmv_out_free, rc = -EINVAL);
}
/**
* ll_dir_setdirstripe will be used to set dir stripe
* mdc_create--->mdt_reint_create (with dirstripe)
*/
rc = ll_dir_setdirstripe(inode, lum, filename);
lmv_out_free:
obd_ioctl_freedata(buf, len);
RETURN(rc);
}
case LL_IOC_LOV_SETSTRIPE: {
struct lov_user_md_v3 lumv3;
struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
int set_default = 0;
LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
LASSERT(sizeof(lumv3.lmm_objects[0]) ==
sizeof(lumv3p->lmm_objects[0]));
/* first try with v1 which is smaller than v3 */
if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
RETURN(-EFAULT);
if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ) {
if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
RETURN(-EFAULT);
}
if (inode->i_sb->s_root == file->f_dentry)
set_default = 1;
/* in v1 and v3 cases lumv1 points to data */
rc = ll_dir_setstripe(inode, lumv1, set_default);
RETURN(rc);
}
case LL_IOC_LMV_GETSTRIPE: {
struct lmv_user_md *lump = (struct lmv_user_md *)arg;
struct lmv_user_md lum;
struct lmv_user_md *tmp;
int lum_size;
int rc = 0;
int mdtindex;
if (copy_from_user(&lum, lump, sizeof(struct lmv_user_md)))
RETURN(-EFAULT);
if (lum.lum_magic != LMV_MAGIC_V1)
RETURN(-EINVAL);
lum_size = lmv_user_md_size(1, LMV_MAGIC_V1);
OBD_ALLOC(tmp, lum_size);
if (tmp == NULL)
GOTO(free_lmv, rc = -ENOMEM);
memcpy(tmp, &lum, sizeof(lum));
tmp->lum_type = LMV_STRIPE_TYPE;
tmp->lum_stripe_count = 1;
mdtindex = ll_get_mdt_idx(inode);
if (mdtindex < 0)
GOTO(free_lmv, rc = -ENOMEM);
tmp->lum_stripe_offset = mdtindex;
tmp->lum_objects[0].lum_mds = mdtindex;
memcpy(&tmp->lum_objects[0].lum_fid, ll_inode2fid(inode),
sizeof(struct lu_fid));
if (copy_to_user((void *)arg, tmp, lum_size))
GOTO(free_lmv, rc = -EFAULT);
free_lmv:
if (tmp)
OBD_FREE(tmp, lum_size);
RETURN(rc);
}
case LL_IOC_REMOVE_ENTRY: {
char *filename = NULL;
int namelen = 0;
int rc;
/* Here is a little hack to avoid sending REINT_RMENTRY to
* unsupported server, which might crash the server(LU-2730),
* Because both LVB_TYPE and REINT_RMENTRY will be supported
* on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
* server will support REINT_RMENTRY XXX*/
if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
return -ENOTSUPP;
filename = ll_getname((const char *)arg);
if (IS_ERR(filename))
RETURN(PTR_ERR(filename));
namelen = strlen(filename);
if (namelen < 1)
GOTO(out_rmdir, rc = -EINVAL);
rc = ll_rmdir_entry(inode, filename, namelen);
out_rmdir:
if (filename)
ll_putname(filename);
RETURN(rc);
}
case LL_IOC_LOV_SWAP_LAYOUTS:
RETURN(-EPERM);
case LL_IOC_OBD_STATFS:
RETURN(ll_obd_statfs(inode, (void *)arg));
case LL_IOC_LOV_GETSTRIPE:
case LL_IOC_MDC_GETINFO:
case IOC_MDC_GETFILEINFO:
case IOC_MDC_GETFILESTRIPE: {
struct ptlrpc_request *request = NULL;
struct lov_user_md *lump;
struct lov_mds_md *lmm = NULL;
struct mdt_body *body;
char *filename = NULL;
int lmmsize;
if (cmd == IOC_MDC_GETFILEINFO ||
cmd == IOC_MDC_GETFILESTRIPE) {
filename = ll_getname((const char *)arg);
if (IS_ERR(filename))
RETURN(PTR_ERR(filename));
rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
&lmmsize, &request);
} else {
rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
}
if (request) {
body = req_capsule_server_get(&request->rq_pill,
&RMF_MDT_BODY);
LASSERT(body != NULL);
} else {
GOTO(out_req, rc);
}
if (rc < 0) {
if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
cmd == LL_IOC_MDC_GETINFO))
GOTO(skip_lmm, rc = 0);
else
GOTO(out_req, rc);
}
if (cmd == IOC_MDC_GETFILESTRIPE ||
cmd == LL_IOC_LOV_GETSTRIPE) {
lump = (struct lov_user_md *)arg;
} else {
struct lov_user_mds_data *lmdp;
lmdp = (struct lov_user_mds_data *)arg;
lump = &lmdp->lmd_lmm;
}
if (copy_to_user(lump, lmm, lmmsize)) {
if (copy_to_user(lump, lmm, sizeof(*lump)))
GOTO(out_req, rc = -EFAULT);
rc = -EOVERFLOW;
}
skip_lmm:
if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
struct lov_user_mds_data *lmdp;
lstat_t st = { 0 };
st.st_dev = inode->i_sb->s_dev;
st.st_mode = body->mode;
st.st_nlink = body->nlink;
st.st_uid = body->uid;
st.st_gid = body->gid;
st.st_rdev = body->rdev;
st.st_size = body->size;
st.st_blksize = PAGE_CACHE_SIZE;
st.st_blocks = body->blocks;
st.st_atime = body->atime;
st.st_mtime = body->mtime;
st.st_ctime = body->ctime;
st.st_ino = inode->i_ino;
lmdp = (struct lov_user_mds_data *)arg;
if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
GOTO(out_req, rc = -EFAULT);
}
EXIT;
out_req:
ptlrpc_req_finished(request);
if (filename)
ll_putname(filename);
return rc;
}
case IOC_LOV_GETINFO: {
struct lov_user_mds_data *lumd;
struct lov_stripe_md *lsm;
struct lov_user_md *lum;
struct lov_mds_md *lmm;
int lmmsize;
lstat_t st;
lumd = (struct lov_user_mds_data *)arg;
lum = &lumd->lmd_lmm;
rc = ll_get_max_mdsize(sbi, &lmmsize);
if (rc)
RETURN(rc);
OBD_ALLOC_LARGE(lmm, lmmsize);
if (copy_from_user(lmm, lum, lmmsize))
GOTO(free_lmm, rc = -EFAULT);
switch (lmm->lmm_magic) {
case LOV_USER_MAGIC_V1:
if (LOV_USER_MAGIC_V1 == cpu_to_le32(LOV_USER_MAGIC_V1))
break;
/* swab objects first so that stripes num will be sane */
lustre_swab_lov_user_md_objects(
((struct lov_user_md_v1 *)lmm)->lmm_objects,
((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
break;
case LOV_USER_MAGIC_V3:
if (LOV_USER_MAGIC_V3 == cpu_to_le32(LOV_USER_MAGIC_V3))
break;
/* swab objects first so that stripes num will be sane */
lustre_swab_lov_user_md_objects(
((struct lov_user_md_v3 *)lmm)->lmm_objects,
((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
break;
default:
GOTO(free_lmm, rc = -EINVAL);
}
rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
if (rc < 0)
GOTO(free_lmm, rc = -ENOMEM);
/* Perform glimpse_size operation. */
memset(&st, 0, sizeof(st));
rc = ll_glimpse_ioctl(sbi, lsm, &st);
if (rc)
GOTO(free_lsm, rc);
if (copy_to_user(&lumd->lmd_st, &st, sizeof(st)))
GOTO(free_lsm, rc = -EFAULT);
EXIT;
free_lsm:
obd_free_memmd(sbi->ll_dt_exp, &lsm);
free_lmm:
OBD_FREE_LARGE(lmm, lmmsize);
return rc;
}
case OBD_IOC_LLOG_CATINFO: {
RETURN(-EOPNOTSUPP);
}
case OBD_IOC_QUOTACHECK: {
struct obd_quotactl *oqctl;
int error = 0;
if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
sbi->ll_flags & LL_SBI_RMT_CLIENT)
RETURN(-EPERM);
OBD_ALLOC_PTR(oqctl);
if (!oqctl)
RETURN(-ENOMEM);
oqctl->qc_type = arg;
rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
if (rc < 0) {
CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
error = rc;
}
rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
if (rc < 0)
CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
OBD_FREE_PTR(oqctl);
return error ?: rc;
}
case OBD_IOC_POLL_QUOTACHECK: {
struct if_quotacheck *check;
if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
sbi->ll_flags & LL_SBI_RMT_CLIENT)
RETURN(-EPERM);
OBD_ALLOC_PTR(check);
if (!check)
RETURN(-ENOMEM);
rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
NULL);
if (rc) {
CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
if (copy_to_user((void *)arg, check,
sizeof(*check)))
CDEBUG(D_QUOTA, "copy_to_user failed\n");
GOTO(out_poll, rc);
}
rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
NULL);
if (rc) {
CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
if (copy_to_user((void *)arg, check,
sizeof(*check)))
CDEBUG(D_QUOTA, "copy_to_user failed\n");
GOTO(out_poll, rc);
}
out_poll:
OBD_FREE_PTR(check);
RETURN(rc);
}
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
case LL_IOC_QUOTACTL_18: {
/* copy the old 1.x quota struct for internal use, then copy
* back into old format struct. For 1.8 compatibility. */
struct if_quotactl_18 *qctl_18;
struct if_quotactl *qctl_20;
OBD_ALLOC_PTR(qctl_18);
if (!qctl_18)
RETURN(-ENOMEM);
OBD_ALLOC_PTR(qctl_20);
if (!qctl_20)
GOTO(out_quotactl_18, rc = -ENOMEM);
if (copy_from_user(qctl_18, (void *)arg, sizeof(*qctl_18)))
GOTO(out_quotactl_20, rc = -ENOMEM);
QCTL_COPY(qctl_20, qctl_18);
qctl_20->qc_idx = 0;
/* XXX: dqb_valid was borrowed as a flag to mark that
* only mds quota is wanted */
if (qctl_18->qc_cmd == Q_GETQUOTA &&
qctl_18->qc_dqblk.dqb_valid) {
qctl_20->qc_valid = QC_MDTIDX;
qctl_20->qc_dqblk.dqb_valid = 0;
} else if (qctl_18->obd_uuid.uuid[0] != '\0') {
qctl_20->qc_valid = QC_UUID;
qctl_20->obd_uuid = qctl_18->obd_uuid;
} else {
qctl_20->qc_valid = QC_GENERAL;
}
rc = quotactl_ioctl(sbi, qctl_20);
if (rc == 0) {
QCTL_COPY(qctl_18, qctl_20);
qctl_18->obd_uuid = qctl_20->obd_uuid;
if (copy_to_user((void *)arg, qctl_18,
sizeof(*qctl_18)))
rc = -EFAULT;
}
out_quotactl_20:
OBD_FREE_PTR(qctl_20);
out_quotactl_18:
OBD_FREE_PTR(qctl_18);
RETURN(rc);
}
#else
#warning "remove old LL_IOC_QUOTACTL_18 compatibility code"
#endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0) */
case LL_IOC_QUOTACTL: {
struct if_quotactl *qctl;
OBD_ALLOC_PTR(qctl);
if (!qctl)
RETURN(-ENOMEM);
if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
GOTO(out_quotactl, rc = -EFAULT);
rc = quotactl_ioctl(sbi, qctl);
if (rc == 0 && copy_to_user((void *)arg,qctl,sizeof(*qctl)))
rc = -EFAULT;
out_quotactl:
OBD_FREE_PTR(qctl);
RETURN(rc);
}
case OBD_IOC_GETDTNAME:
case OBD_IOC_GETMDNAME:
RETURN(ll_get_obd_name(inode, cmd, arg));
case LL_IOC_FLUSHCTX:
RETURN(ll_flush_ctx(inode));
#ifdef CONFIG_FS_POSIX_ACL
case LL_IOC_RMTACL: {
if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
inode == inode->i_sb->s_root->d_inode) {
struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
LASSERT(fd != NULL);
rc = rct_add(&sbi->ll_rct, current_pid(), arg);
if (!rc)
fd->fd_flags |= LL_FILE_RMTACL;
RETURN(rc);
} else
RETURN(0);
}
#endif
case LL_IOC_GETOBDCOUNT: {
int count, vallen;
struct obd_export *exp;
if (copy_from_user(&count, (int *)arg, sizeof(int)))
RETURN(-EFAULT);
/* get ost count when count is zero, get mdt count otherwise */
exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
vallen = sizeof(count);
rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
KEY_TGT_COUNT, &vallen, &count, NULL);
if (rc) {
CERROR("get target count failed: %d\n", rc);
RETURN(rc);
}
if (copy_to_user((int *)arg, &count, sizeof(int)))
RETURN(-EFAULT);
RETURN(0);
}
case LL_IOC_PATH2FID:
if (copy_to_user((void *)arg, ll_inode2fid(inode),
sizeof(struct lu_fid)))
RETURN(-EFAULT);
RETURN(0);
case LL_IOC_GET_CONNECT_FLAGS: {
RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, (void*)arg));
}
case OBD_IOC_CHANGELOG_SEND:
case OBD_IOC_CHANGELOG_CLEAR:
rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
sizeof(struct ioc_changelog));
RETURN(rc);
case OBD_IOC_FID2PATH:
RETURN(ll_fid2path(inode, (void *)arg));
case LL_IOC_HSM_REQUEST: {
struct hsm_user_request *hur;
int totalsize;
OBD_ALLOC_PTR(hur);
if (hur == NULL)
RETURN(-ENOMEM);
/* We don't know the true size yet; copy the fixed-size part */
if (copy_from_user(hur, (void *)arg, sizeof(*hur))) {
OBD_FREE_PTR(hur);
RETURN(-EFAULT);
}
/* Compute the whole struct size */
totalsize = hur_len(hur);
OBD_FREE_PTR(hur);
OBD_ALLOC_LARGE(hur, totalsize);
if (hur == NULL)
RETURN(-ENOMEM);
/* Copy the whole struct */
if (copy_from_user(hur, (void *)arg, totalsize)) {
OBD_FREE_LARGE(hur, totalsize);
RETURN(-EFAULT);
}
rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
hur, NULL);
OBD_FREE_LARGE(hur, totalsize);
RETURN(rc);
}
case LL_IOC_HSM_PROGRESS: {
struct hsm_progress_kernel hpk;
struct hsm_progress hp;
if (copy_from_user(&hp, (void *)arg, sizeof(hp)))
RETURN(-EFAULT);
hpk.hpk_fid = hp.hp_fid;
hpk.hpk_cookie = hp.hp_cookie;
hpk.hpk_extent = hp.hp_extent;
hpk.hpk_flags = hp.hp_flags;
hpk.hpk_errval = hp.hp_errval;
hpk.hpk_data_version = 0;
/* File may not exist in Lustre; all progress
* reported to Lustre root */
rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
NULL);
RETURN(rc);
}
case LL_IOC_HSM_CT_START:
rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
sizeof(struct lustre_kernelcomm));
RETURN(rc);
case LL_IOC_HSM_COPY_START: {
struct hsm_copy *copy;
int rc;
OBD_ALLOC_PTR(copy);
if (copy == NULL)
RETURN(-ENOMEM);
if (copy_from_user(copy, (char *)arg, sizeof(*copy))) {
OBD_FREE_PTR(copy);
RETURN(-EFAULT);
}
rc = ll_ioc_copy_start(inode->i_sb, copy);
if (copy_to_user((char *)arg, copy, sizeof(*copy)))
rc = -EFAULT;
OBD_FREE_PTR(copy);
RETURN(rc);
}
case LL_IOC_HSM_COPY_END: {
struct hsm_copy *copy;
int rc;
OBD_ALLOC_PTR(copy);
if (copy == NULL)
RETURN(-ENOMEM);
if (copy_from_user(copy, (char *)arg, sizeof(*copy))) {
OBD_FREE_PTR(copy);
RETURN(-EFAULT);
}
rc = ll_ioc_copy_end(inode->i_sb, copy);
if (copy_to_user((char *)arg, copy, sizeof(*copy)))
rc = -EFAULT;
OBD_FREE_PTR(copy);
RETURN(rc);
}
default:
RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
(void *)arg));
}
}
static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
{
struct inode *inode = file->f_mapping->host;
struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
struct ll_sb_info *sbi = ll_i2sbi(inode);
int api32 = ll_need_32bit_api(sbi);
loff_t ret = -EINVAL;
ENTRY;
mutex_lock(&inode->i_mutex);
switch (origin) {
case SEEK_SET:
break;
case SEEK_CUR:
offset += file->f_pos;
break;
case SEEK_END:
if (offset > 0)
GOTO(out, ret);
if (api32)
offset += LL_DIR_END_OFF_32BIT;
else
offset += LL_DIR_END_OFF;
break;
default:
GOTO(out, ret);
}
if (offset >= 0 &&
((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
(!api32 && offset <= LL_DIR_END_OFF))) {
if (offset != file->f_pos) {
if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
(!api32 && offset == LL_DIR_END_OFF))
fd->lfd_pos = MDS_DIR_END_OFF;
else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
fd->lfd_pos = offset << 32;
else
fd->lfd_pos = offset;
file->f_pos = offset;
file->f_version = 0;
}
ret = offset;
}
GOTO(out, ret);
out:
mutex_unlock(&inode->i_mutex);
return ret;
}
int ll_dir_open(struct inode *inode, struct file *file)
{
ENTRY;
RETURN(ll_file_open(inode, file));
}
int ll_dir_release(struct inode *inode, struct file *file)
{
ENTRY;
RETURN(ll_file_release(inode, file));
}
struct file_operations ll_dir_operations = {
.llseek = ll_dir_seek,
.open = ll_dir_open,
.release = ll_dir_release,
.read = generic_read_dir,
.readdir = ll_readdir,
.unlocked_ioctl = ll_dir_ioctl,
.fsync = ll_fsync,
};
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