dir.c 42.25 KiB
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* 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 [sun.com URL with a
* copy of GPLv2].
*
* 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 2008 Sun Microsystems, Inc. All rights reserved
* Use is subject to license terms.
*/
/*
* 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 <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <linux/buffer_head.h> // for wait_on_buffer
#define DEBUG_SUBSYSTEM S_LLITE
#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"
#ifndef HAVE_PAGE_CHECKED
#ifdef HAVE_PG_FS_MISC
#define PageChecked(page) test_bit(PG_fs_misc, &(page)->flags)
#define SetPageChecked(page) set_bit(PG_fs_misc, &(page)->flags)
#else
#error PageChecked or PageFsMisc not defined in kernel
#endif
#endif
/*
* (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
* *
*
*
*
*/
/* returns the page unlocked, but with a reference */
static int ll_dir_readpage(struct file *file, struct page *page)
{
struct inode *inode = page->mapping->host;
struct ptlrpc_request *request;
struct mdt_body *body;
struct obd_capa *oc;
__u64 hash;
int rc;
ENTRY;
hash = (__u64)hash_x_index(page->index);
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) off %lu\n",
inode->i_ino, inode->i_generation, inode, (unsigned long)hash);
oc = ll_mdscapa_get(inode);
rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode),
oc, hash, page, &request);
capa_put(oc);
if (!rc) {
body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
/* Checked by mdc_readpage() */
LASSERT(body != NULL);
if (body->valid & OBD_MD_FLSIZE) {
ll_inode_size_lock(inode, 0);
i_size_write(inode, body->size);
ll_inode_size_unlock(inode, 0);
}
SetPageUptodate(page);
}
ptlrpc_req_finished(request);
unlock_page(page);
EXIT;
return rc;
}
struct address_space_operations ll_dir_aops = {
.readpage = ll_dir_readpage,
};
static void ll_check_page(struct inode *dir, struct page *page)
{
/* XXX: check page format later */
SetPageChecked(page);
}
static void ll_release_page(struct page *page, __u64 hash,
__u64 start, __u64 end)
{
kunmap(page);
lock_page(page);
if (likely(page->mapping != NULL)) {
ll_truncate_complete_page(page);
unlock_page(page);
} else {
unlock_page(page);
CWARN("NULL mapping page %p, truncated by others: "
"hash(%#llx) | start(%#llx) | end(%#llx)\n",
page, hash, start, end);
}
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)
{
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((__u32)hash);
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_readpage() does synchronous io.
*/
wait_on_page(page);
if (PageUptodate(page)) {
dp = kmap(page);
*start = le64_to_cpu(dp->ldp_hash_start);
*end = le64_to_cpu(dp->ldp_hash_end);
LASSERT(*start <= hash);
if (hash > *end || (*end != *start && hash == *end)) {
ll_release_page(page, hash, *start, *end);
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, int exact,
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;
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 = { LDLM_IBITS, mode,
ll_md_blocking_ast, ldlm_completion_ast, NULL, dir };
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, 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: rc: %d\n", rc);
return ERR_PTR(rc);
}
} 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);
}
ldlm_lock_dump_handle(D_OTHER, &lockh);
page = ll_dir_page_locate(dir, hash, &start, &end);
if (IS_ERR(page))
GOTO(out_unlock, page);
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.
*/
if (exact && hash != start) {
/*
* readdir asked for a page starting _exactly_ from
* given hash, but cache contains stale page, with
* entries with smaller hash values. Stale page should
* be invalidated, and new one fetched.
*/
CWARN("Stale readpage page %p: %#llx != %#llx\n",
page, hash, start);
ll_release_page(page, hash, start, end);
} else {
GOTO(hash_collision, page);
}
}
page = read_cache_page(mapping, hash_x_index((__u32)hash),
(filler_t*)mapping->a_ops->readpage, NULL);
if (IS_ERR(page))
GOTO(out_unlock, page);
wait_on_page(page);
(void)kmap(page);
if (!PageUptodate(page))
goto fail;
if (!PageChecked(page))
ll_check_page(dir, page);
if (PageError(page))
goto fail;
hash_collision:
dp = page_address(page);
start = le64_to_cpu(dp->ldp_hash_start);
end = le64_to_cpu(dp->ldp_hash_end);
if (end == start) {
LASSERT(start == hash);
CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
/*
* Fetch whole overflow chain...
*
* XXX not yet.
*/
goto fail;
}
out_unlock:
ldlm_lock_decref(&lockh, mode);
return page;
fail:
ll_put_page(page);
page = ERR_PTR(-EIO);
goto out_unlock;
}
int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
struct ll_inode_info *info = ll_i2info(inode);
struct ll_sb_info *sbi = ll_i2sbi(inode);
__u64 pos = filp->f_pos;
struct page *page;
struct ll_dir_chain chain;
int rc;
int done;
int shift;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu\n",
inode->i_ino, inode->i_generation, inode,
(unsigned long)pos, i_size_read(inode));
if (pos == DIR_END_OFF)
/*
* end-of-file.
*/
RETURN(0);
rc = 0;
done = 0;
shift = 0;
ll_dir_chain_init(&chain);
page = ll_get_dir_page(inode, pos, 0, &chain);
while (rc == 0 && !done) {
struct lu_dirpage *dp;
struct lu_dirent *ent;
if (!IS_ERR(page)) {
/* * If page is empty (end of directoryis reached),
* use this value.
*/
__u64 hash = DIR_END_OFF;
__u64 next;
dp = page_address(page);
for (ent = lu_dirent_start(dp); ent != NULL && !done;
ent = lu_dirent_next(ent)) {
char *name;
int namelen;
struct lu_fid fid;
ino_t ino;
/*
* XXX: implement correct swabbing here.
*/
hash = le64_to_cpu(ent->lde_hash);
namelen = le16_to_cpu(ent->lde_namelen);
if (hash < pos)
/*
* Skip until we find target hash
* value.
*/
continue;
if (namelen == 0)
/*
* Skip dummy record.
*/
continue;
fid = ent->lde_fid;
name = ent->lde_name;
fid_le_to_cpu(&fid, &fid);
ino = ll_fid_build_ino(sbi, &fid);
done = filldir(cookie, name, namelen,
(loff_t)hash, ino, DT_UNKNOWN);
}
next = le64_to_cpu(dp->ldp_hash_end);
ll_put_page(page);
if (!done) {
pos = next;
if (pos == DIR_END_OFF)
/*
* End of directory reached.
*/
done = 1;
else if (1 /* chain is exhausted*/)
/*
* Normal case: continue to the next
* page.
*/
page = ll_get_dir_page(inode, pos, 1,
&chain);
else {
/*
* go into overflow page.
*/
}
} else
pos = hash;
} else {
rc = PTR_ERR(page);
CERROR("error reading dir "DFID" at %lu: rc %d\n",
PFID(&info->lli_fid), (unsigned long)pos, rc);
} }
filp->f_pos = (loff_t)(__s32)pos;
filp->f_version = inode->i_version;
touch_atime(filp->f_vfsmnt, filp->f_dentry);
ll_dir_chain_fini(&chain);
RETURN(rc);
}
#define QCTL_COPY(out, in) \
do { \
Q_COPY(out, in, qc_cmd); \
Q_COPY(out, in, qc_type); \
Q_COPY(out, in, qc_id); \
Q_COPY(out, in, qc_stat); \
Q_COPY(out, in, qc_dqinfo); \
Q_COPY(out, in, qc_dqblk); \
} while (0)
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(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;
}
char *ll_get_fsname(struct inode *inode)
{
struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
char *ptr, *fsname;
int len;
OBD_ALLOC(fsname, MGS_PARAM_MAXLEN);
len = strlen(lsi->lsi_lmd->lmd_profile);
ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
if (ptr && (strcmp(ptr, "-client") == 0))
len -= 7;
strncpy(fsname, lsi->lsi_lmd->lmd_profile, len);
fsname[len] = '\0';
return fsname;
}
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;
char *fsname = NULL, *param = 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.
*/
if (lump->lmm_magic != LOV_USER_MAGIC)
RETURN(-EINVAL);
if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC))
lustre_swab_lov_user_md(lump);
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));
/* swabbing is done in lov_setstripe() on server side */
rc = md_setattr(sbi->ll_md_exp, op_data, lump, sizeof(*lump),
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);
}
if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
OBD_ALLOC(param, MGS_PARAM_MAXLEN);
/* Get fsname and assume devname to be -MDT0000. */
fsname = ll_get_fsname(inode);
/* Set root stripesize */
sprintf(param, "%s-MDT0000.lov.stripesize=%u", fsname,
lump->lmm_stripe_size);
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
if (rc)
goto end;
/* Set root stripecount */
sprintf(param, "%s-MDT0000.lov.stripecount=%u", fsname,
lump->lmm_stripe_count);
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
if (rc)
goto end;
/* Set root stripeoffset */
sprintf(param, "%s-MDT0000.lov.stripeoffset=%u", fsname,
lump->lmm_stripe_offset);
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
if (rc)
goto end;
end:
if (fsname)
OBD_FREE(fsname, MGS_PARAM_MAXLEN);
if (param)
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 obd_capa *oc;
rc = ll_get_max_mdsize(sbi, &lmmsize);
if (rc) RETURN(rc);
oc = ll_mdscapa_get(inode);
rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode),
oc, OBD_MD_FLEASIZE | OBD_MD_FLDIREA,
lmmsize, &req);
capa_put(oc);
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.
*/
if (lmm->lmm_magic == __swab32(LOV_MAGIC)) {
lustre_swab_lov_user_md((struct lov_user_md *)lmm);
}
out:
*lmmp = lmm;
*lmm_size = lmmsize;
*request = req;
return rc;
}
static int ll_dir_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct obd_ioctl_data *data;
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 EXT3_IOC_GETFLAGS:
case EXT3_IOC_SETFLAGS:
RETURN(ll_iocontrol(inode, file, cmd, arg));
case EXT3_IOC_GETVERSION_OLD:
case EXT3_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 EXT3_IOC_SETVERSION_OLD:
case EXT3_IOC_SETVERSION: */
case IOC_MDC_LOOKUP: {
struct ptlrpc_request *request = NULL;
int namelen, rc, len = 0;
char *buf = NULL;
char *filename;
struct obd_capa *oc;
rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
if (rc)
RETURN(rc);
data = (void *)buf;
filename = data->ioc_inlbuf1;
namelen = data->ioc_inllen1;
if (namelen < 1) {
CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
GOTO(out, rc = -EINVAL);
}
oc = ll_mdscapa_get(inode);
rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode), oc,
filename, namelen, OBD_MD_FLID, 0,
ll_i2suppgid(inode), &request);
capa_put(oc);
if (rc < 0) {
CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
GOTO(out, rc);
}
ptlrpc_req_finished(request);
EXIT;
out:
obd_ioctl_freedata(buf, len);
return rc;
}
case LL_IOC_LOV_SETSTRIPE: {
struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
int rc = 0;
int set_default = 0;
LASSERT(sizeof(lum) == sizeof(*lump));
LASSERT(sizeof(lum.lmm_objects[0]) ==
sizeof(lump->lmm_objects[0]));
rc = copy_from_user(&lum, lump, sizeof(lum));
if (rc)
RETURN(-EFAULT);
if (inode->i_sb->s_root == file->f_dentry)
set_default = 1;
rc = ll_dir_setstripe(inode, &lum, set_default);
RETURN(rc);
}
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 rc, lmmsize;
if (cmd == IOC_MDC_GETFILEINFO ||
cmd == IOC_MDC_GETFILESTRIPE) {
filename = 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;
}
rc = copy_to_user(lump, lmm, lmmsize);
if (rc)
GOTO(out_lmm, rc = -EFAULT);
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 = CFS_PAGE_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;
rc = copy_to_user(&lmdp->lmd_st, &st, sizeof(st));
if (rc)
GOTO(out_lmm, rc = -EFAULT);
}
EXIT;
out_lmm:
if (lmm && lmm->lmm_magic == LOV_MAGIC_JOIN)
OBD_FREE(lmm, lmmsize);
out_req:
ptlrpc_req_finished(request); if (filename)
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;
int rc;
lumd = (struct lov_user_mds_data *)arg;
lum = &lumd->lmd_lmm;
rc = ll_get_max_mdsize(sbi, &lmmsize);
if (rc)
RETURN(rc);
OBD_ALLOC(lmm, lmmsize);
rc = copy_from_user(lmm, lum, lmmsize);
if (rc)
GOTO(free_lmm, rc = -EFAULT);
rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
if (rc < 0)
GOTO(free_lmm, rc = -ENOMEM);
rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
if (rc)
GOTO(free_lsm, rc);
/* Perform glimpse_size operation. */
memset(&st, 0, sizeof(st));
rc = ll_glimpse_ioctl(sbi, lsm, &st);
if (rc)
GOTO(free_lsm, rc);
rc = copy_to_user(&lumd->lmd_st, &st, sizeof(st));
if (rc)
GOTO(free_lsm, rc = -EFAULT);
EXIT;
free_lsm:
obd_free_memmd(sbi->ll_dt_exp, &lsm);
free_lmm:
OBD_FREE(lmm, lmmsize);
return rc;
}
case OBD_IOC_LLOG_CATINFO: {
struct ptlrpc_request *req = NULL;
char *buf = NULL;
char *str;
int len = 0;
int rc;
rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
if (rc)
RETURN(rc);
data = (void *)buf;
if (!data->ioc_inlbuf1) {
obd_ioctl_freedata(buf, len);
RETURN(-EINVAL);
}
req = ptlrpc_request_alloc(sbi2mdc(sbi)->cl_import,
&RQF_LLOG_CATINFO); if (req == NULL)
GOTO(out_catinfo, rc = -ENOMEM);
req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
data->ioc_inllen1);
req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_CLIENT,
data->ioc_inllen2);
rc = ptlrpc_request_pack(req, LUSTRE_LOG_VERSION, LLOG_CATINFO);
if (rc) {
ptlrpc_request_free(req);
GOTO(out_catinfo, rc);
}
str = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
memcpy(str, data->ioc_inlbuf1, data->ioc_inllen1);
if (data->ioc_inllen2) {
str = req_capsule_client_get(&req->rq_pill,
&RMF_STRING);
memcpy(str, data->ioc_inlbuf2, data->ioc_inllen2);
}
req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_SERVER,
data->ioc_plen1);
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (!rc) {
str = req_capsule_server_get(&req->rq_pill,
&RMF_STRING);
rc = copy_to_user(data->ioc_pbuf1, str, data->ioc_plen1);
}
ptlrpc_req_finished(req);
out_catinfo:
obd_ioctl_freedata(buf, len);
RETURN(rc);
}
case OBD_IOC_QUOTACHECK: {
struct obd_quotactl *oqctl;
int rc, error = 0;
if (!capable(CAP_SYS_ADMIN))
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;
int rc;
if (!capable(CAP_SYS_ADMIN))
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)))
rc = -EFAULT;
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)))
rc = -EFAULT;
GOTO(out_poll, rc);
}
out_poll:
OBD_FREE_PTR(check);
RETURN(rc);
}
#ifdef HAVE_QUOTA_SUPPORT
case OBD_IOC_QUOTACTL: {
struct if_quotactl *qctl;
struct obd_quotactl *oqctl;
int cmd, type, id, rc = 0;
OBD_ALLOC_PTR(qctl);
if (!qctl)
RETURN(-ENOMEM);
OBD_ALLOC_PTR(oqctl);
if (!oqctl) {
OBD_FREE_PTR(qctl);
RETURN(-ENOMEM);
}
if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
GOTO(out_quotactl, rc = -EFAULT);
cmd = qctl->qc_cmd;
type = qctl->qc_type;
id = qctl->qc_id;
switch (cmd) {
case Q_QUOTAON:
case Q_QUOTAOFF:
case Q_SETQUOTA:
case Q_SETINFO:
if (!capable(CAP_SYS_ADMIN))
GOTO(out_quotactl, rc = -EPERM);
break;
case Q_GETQUOTA:
if (((type == USRQUOTA && current->euid != id) ||
(type == GRPQUOTA && !in_egroup_p(id))) &&
!capable(CAP_SYS_ADMIN))
GOTO(out_quotactl, rc = -EPERM);
/* XXX: dqb_valid is borrowed as a flag to mark that
* only mds quota is wanted */
if (qctl->qc_dqblk.dqb_valid)
qctl->obd_uuid = sbi->ll_md_exp->exp_obd->
u.cli.cl_target_uuid;
break;
case Q_GETINFO:
break;
default:
CERROR("unsupported quotactl op: %#x\n", cmd);
GOTO(out_quotactl, rc = -ENOTTY); }
QCTL_COPY(oqctl, qctl);
if (qctl->obd_uuid.uuid[0]) {
struct obd_device *obd;
struct obd_uuid *uuid = &qctl->obd_uuid;
obd = class_find_client_notype(uuid,
&sbi->ll_dt_exp->exp_obd->obd_uuid);
if (!obd)
GOTO(out_quotactl, rc = -ENOENT);
if (cmd == Q_GETINFO)
oqctl->qc_cmd = Q_GETOINFO;
else if (cmd == Q_GETQUOTA)
oqctl->qc_cmd = Q_GETOQUOTA;
else
GOTO(out_quotactl, rc = -EINVAL);
if (sbi->ll_md_exp->exp_obd == obd) {
rc = obd_quotactl(sbi->ll_md_exp, oqctl);
} else {
int i;
struct obd_export *exp;
struct lov_obd *lov = &sbi->ll_dt_exp->
exp_obd->u.lov;
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i] ||
!lov->lov_tgts[i]->ltd_active)
continue;
exp = lov->lov_tgts[i]->ltd_exp;
if (exp->exp_obd == obd) {
rc = obd_quotactl(exp, oqctl);
break;
}
}
}
oqctl->qc_cmd = cmd;
QCTL_COPY(qctl, oqctl);
if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
rc = -EFAULT;
GOTO(out_quotactl, rc);
}
rc = obd_quotactl(sbi->ll_md_exp, oqctl);
if (rc && rc != -EBUSY && cmd == Q_QUOTAON) {
oqctl->qc_cmd = Q_QUOTAOFF;
obd_quotactl(sbi->ll_md_exp, oqctl);
}
QCTL_COPY(qctl, oqctl);
if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
rc = -EFAULT;
out_quotactl:
OBD_FREE_PTR(qctl);
OBD_FREE_PTR(oqctl);
RETURN(rc);
}
#endif /* HAVE_QUOTA_SUPPORT */
case OBD_IOC_GETNAME: {
struct obd_device *obd = class_exp2obd(sbi->ll_dt_exp);
if (!obd)
RETURN(-EFAULT);
if (copy_to_user((void *)arg, obd->obd_name, strlen(obd->obd_name) + 1))
RETURN (-EFAULT);
RETURN(0);
}
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);
int rc;
LASSERT(fd != NULL);
rc = rct_add(&sbi->ll_rct, cfs_curproc_pid(), arg);
if (!rc)
fd->fd_flags |= LL_FILE_RMTACL;
RETURN(rc);
} else
RETURN(0);
}
#endif
default:
RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
}
}
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 = {
.open = ll_dir_open,
.release = ll_dir_release,
.read = generic_read_dir,
.readdir = ll_readdir,
.ioctl = ll_dir_ioctl
};