#define DEBUG_SUBSYSTEM S_LLITE
#include <linux/module.h>
+#include <linux/statfs.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/mm.h>
#include <lustre_ioctl.h>
-#include <lustre_lite.h>
#include <lustre_ha.h>
#include <lustre_dlm.h>
#include <lprocfs_status.h>
/* initialize ll_cache data */
atomic_set(&sbi->ll_cache.ccc_users, 0);
sbi->ll_cache.ccc_lru_max = lru_page_max;
- atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
+ atomic_long_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
- atomic_set(&sbi->ll_cache.ccc_unstable_nr, 0);
+ /* turn unstable check off by default as it impacts performance */
+ sbi->ll_cache.ccc_unstable_check = 0;
+ atomic_long_set(&sbi->ll_cache.ccc_unstable_nr, 0);
init_waitqueue_head(&sbi->ll_cache.ccc_unstable_waitq);
sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
sbi->ll_sa_max = LL_SA_RPC_DEF;
atomic_set(&sbi->ll_sa_total, 0);
atomic_set(&sbi->ll_sa_wrong, 0);
+ atomic_set(&sbi->ll_sa_running, 0);
atomic_set(&sbi->ll_agl_total, 0);
sbi->ll_flags |= LL_SBI_AGL_ENABLED;
OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
OBD_CONNECT_MAX_EASIZE |
OBD_CONNECT_FLOCK_DEAD |
- OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK;
+ OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
+ OBD_CONNECT_OPEN_BY_FID |
+ OBD_CONNECT_DIR_STRIPE;
if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
data->ocd_connect_flags |= OBD_CONNECT_SOM;
" flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
dentry->d_name.len, dentry->d_name.name,
dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
- dentry->d_parent, dentry->d_inode, d_count(dentry),
+ dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
dentry->d_flags, dentry->d_fsdata, subdirs);
if (dentry->d_inode != NULL)
ll_dump_inode(dentry->d_inode);
void ll_kill_super(struct super_block *sb)
{
- struct ll_sb_info *sbi;
-
- ENTRY;
+ struct ll_sb_info *sbi;
+ ENTRY;
/* not init sb ?*/
- if (!(sb->s_flags & MS_ACTIVE))
- return;
+ if (!(sb->s_flags & MS_ACTIVE))
+ return;
- sbi = ll_s2sbi(sb);
- /* we need restore s_dev from changed for clustred NFS before put_super
- * because new kernels have cached s_dev and change sb->s_dev in
- * put_super not affected real removing devices */
+ sbi = ll_s2sbi(sb);
+ /* we need restore s_dev from changed for clustred NFS before put_super
+ * because new kernels have cached s_dev and change sb->s_dev in
+ * put_super not affected real removing devices */
if (sbi) {
sb->s_dev = sbi->ll_sdev_orig;
sbi->ll_umounting = 1;
+
+ /* wait running statahead threads to quit */
+ while (atomic_read(&sbi->ll_sa_running) > 0)
+ schedule_timeout_and_set_state(TASK_UNINTERRUPTIBLE,
+ msecs_to_jiffies(MSEC_PER_SEC >> 3));
}
+
EXIT;
}
*flags &= ~tmp;
goto next;
}
-#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 51, 0)
- tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
- if (tmp) {
- /* Ignore deprecated mount option. The client will
- * always try to mount with ACL support, whether this
- * is used depends on whether server supports it. */
- LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
- "mount option 'acl'.\n");
- goto next;
- }
- tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
+ tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
if (tmp) {
- LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
- "mount option 'noacl'.\n");
+ *flags |= tmp;
goto next;
}
-#else
-#warning "{no}acl options have been deprecated since 1.8, please remove them"
-#endif
- tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
- if (tmp) {
- *flags |= tmp;
- goto next;
- }
tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
if (tmp) {
*flags |= tmp;
lli->lli_sai = NULL;
spin_lock_init(&lli->lli_sa_lock);
lli->lli_opendir_pid = 0;
+ lli->lli_sa_enabled = 0;
} else {
mutex_init(&lli->lli_size_mutex);
lli->lli_symlink_name = NULL;
init_rwsem(&lli->lli_trunc_sem);
- mutex_init(&lli->lli_write_mutex);
+ range_lock_tree_init(&lli->lli_write_tree);
init_rwsem(&lli->lli_glimpse_sem);
lli->lli_glimpse_time = 0;
INIT_LIST_HEAD(&lli->lli_agl_list);
struct lustre_sb_info *lsi = s2lsi(sb);
struct ll_sb_info *sbi = ll_s2sbi(sb);
char *profilenm = get_profile_name(sb);
- int ccc_count, next, force = 1, rc = 0;
+ long ccc_count;
+ int next, force = 1, rc = 0;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
if (force == 0) {
struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
rc = l_wait_event(sbi->ll_cache.ccc_unstable_waitq,
- atomic_read(&sbi->ll_cache.ccc_unstable_nr) == 0,
+ atomic_long_read(&sbi->ll_cache.ccc_unstable_nr) == 0,
&lwi);
}
- ccc_count = atomic_read(&sbi->ll_cache.ccc_unstable_nr);
+ ccc_count = atomic_long_read(&sbi->ll_cache.ccc_unstable_nr);
if (force == 0 && rc != -EINTR)
- LASSERTF(ccc_count == 0, "count: %i\n", ccc_count);
+ LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
/* We need to set force before the lov_disconnect in
struct lmv_stripe_md *lsm = md->lmv;
inode->i_mode = (inode->i_mode & ~S_IFMT) |
- (body->mode & S_IFMT);
+ (body->mbo_mode & S_IFMT);
LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
PFID(fid));
LASSERT(lsm != NULL);
/* master object FID */
- lli->lli_pfid = body->fid1;
+ lli->lli_pfid = body->mbo_fid1;
CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
lli, PFID(fid), PFID(&lli->lli_pfid));
unlock_new_inode(inode);
struct lmv_stripe_md *old_lsm = lli->lli_lsm_md;
int idx;
- CERROR("%s: lmv layout mismatch "DFID"(%p)/"DFID"(%p)"
+ CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
"magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
"hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
- ll_get_fsname(inode->i_sb, NULL, 0),
- PFID(&lsm->lsm_md_master_fid), lsm,
- PFID(&old_lsm->lsm_md_master_fid), old_lsm,
+ ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
+ inode, lsm, old_lsm,
lsm->lsm_md_magic, old_lsm->lsm_md_magic,
lsm->lsm_md_stripe_count,
old_lsm->lsm_md_stripe_count,
EXIT;
}
-int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
- struct md_open_data **mod)
+static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
+ struct md_open_data **mod)
{
struct lustre_md md;
struct inode *inode = dentry->d_inode;
op_data->op_attr.ia_valid = ia_valid;
/* Extract epoch data if obtained. */
- op_data->op_handle = md.body->handle;
- op_data->op_ioepoch = md.body->ioepoch;
+ op_data->op_handle = md.body->mbo_handle;
+ op_data->op_ioepoch = md.body->mbo_ioepoch;
rc = ll_update_inode(inode, &md);
ptlrpc_req_finished(request);
struct lov_stripe_md *lsm = md->lsm;
struct ll_sb_info *sbi = ll_i2sbi(inode);
- LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
+ LASSERT((lsm != NULL) == ((body->mbo_valid & OBD_MD_FLEASIZE) != 0));
if (lsm != NULL) {
if (!lli->lli_has_smd &&
!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
}
if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
- if (body->valid & OBD_MD_FLRMTPERM)
- ll_update_remote_perm(inode, md->remote_perm);
- }
+ if (body->mbo_valid & OBD_MD_FLRMTPERM)
+ ll_update_remote_perm(inode, md->remote_perm);
+ }
#ifdef CONFIG_FS_POSIX_ACL
- else if (body->valid & OBD_MD_FLACL) {
+ else if (body->mbo_valid & OBD_MD_FLACL) {
spin_lock(&lli->lli_lock);
if (lli->lli_posix_acl)
posix_acl_release(lli->lli_posix_acl);
spin_unlock(&lli->lli_lock);
}
#endif
- inode->i_ino = cl_fid_build_ino(&body->fid1,
+ inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
sbi->ll_flags & LL_SBI_32BIT_API);
- inode->i_generation = cl_fid_build_gen(&body->fid1);
+ inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
- if (body->valid & OBD_MD_FLATIME) {
- if (body->atime > LTIME_S(inode->i_atime))
- LTIME_S(inode->i_atime) = body->atime;
- lli->lli_lvb.lvb_atime = body->atime;
- }
- if (body->valid & OBD_MD_FLMTIME) {
- if (body->mtime > LTIME_S(inode->i_mtime)) {
- CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
- "to "LPU64"\n", inode->i_ino,
- LTIME_S(inode->i_mtime), body->mtime);
- LTIME_S(inode->i_mtime) = body->mtime;
- }
- lli->lli_lvb.lvb_mtime = body->mtime;
- }
- if (body->valid & OBD_MD_FLCTIME) {
- if (body->ctime > LTIME_S(inode->i_ctime))
- LTIME_S(inode->i_ctime) = body->ctime;
- lli->lli_lvb.lvb_ctime = body->ctime;
- }
- if (body->valid & OBD_MD_FLMODE)
- inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
- if (body->valid & OBD_MD_FLTYPE)
- inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
- LASSERT(inode->i_mode != 0);
- if (S_ISREG(inode->i_mode)) {
- inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
- } else {
- inode->i_blkbits = inode->i_sb->s_blocksize_bits;
- }
- if (body->valid & OBD_MD_FLUID)
- inode->i_uid = make_kuid(&init_user_ns, body->uid);
- if (body->valid & OBD_MD_FLGID)
- inode->i_gid = make_kgid(&init_user_ns, body->gid);
- if (body->valid & OBD_MD_FLFLAGS)
- inode->i_flags = ll_ext_to_inode_flags(body->flags);
- if (body->valid & OBD_MD_FLNLINK)
- set_nlink(inode, body->nlink);
- if (body->valid & OBD_MD_FLRDEV)
- inode->i_rdev = old_decode_dev(body->rdev);
-
- if (body->valid & OBD_MD_FLID) {
+ if (body->mbo_valid & OBD_MD_FLATIME) {
+ if (body->mbo_atime > LTIME_S(inode->i_atime))
+ LTIME_S(inode->i_atime) = body->mbo_atime;
+ lli->lli_atime = body->mbo_atime;
+ }
+
+ if (body->mbo_valid & OBD_MD_FLMTIME) {
+ if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
+ CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
+ "to "LPU64"\n", inode->i_ino,
+ LTIME_S(inode->i_mtime), body->mbo_mtime);
+ LTIME_S(inode->i_mtime) = body->mbo_mtime;
+ }
+ lli->lli_mtime = body->mbo_mtime;
+ }
+
+ if (body->mbo_valid & OBD_MD_FLCTIME) {
+ if (body->mbo_ctime > LTIME_S(inode->i_ctime))
+ LTIME_S(inode->i_ctime) = body->mbo_ctime;
+ lli->lli_ctime = body->mbo_ctime;
+ }
+
+ if (body->mbo_valid & OBD_MD_FLMODE)
+ inode->i_mode = (inode->i_mode & S_IFMT) |
+ (body->mbo_mode & ~S_IFMT);
+
+ if (body->mbo_valid & OBD_MD_FLTYPE)
+ inode->i_mode = (inode->i_mode & ~S_IFMT) |
+ (body->mbo_mode & S_IFMT);
+
+ LASSERT(inode->i_mode != 0);
+ if (S_ISREG(inode->i_mode))
+ inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
+ LL_MAX_BLKSIZE_BITS);
+ else
+ inode->i_blkbits = inode->i_sb->s_blocksize_bits;
+
+ if (body->mbo_valid & OBD_MD_FLUID)
+ inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
+ if (body->mbo_valid & OBD_MD_FLGID)
+ inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
+ if (body->mbo_valid & OBD_MD_FLFLAGS)
+ inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
+ if (body->mbo_valid & OBD_MD_FLNLINK)
+ set_nlink(inode, body->mbo_nlink);
+ if (body->mbo_valid & OBD_MD_FLRDEV)
+ inode->i_rdev = old_decode_dev(body->mbo_rdev);
+
+ if (body->mbo_valid & OBD_MD_FLID) {
/* FID shouldn't be changed! */
if (fid_is_sane(&lli->lli_fid)) {
- LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
+ LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
"Trying to change FID "DFID
" to the "DFID", inode "DFID"(%p)\n",
- PFID(&lli->lli_fid), PFID(&body->fid1),
+ PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
PFID(ll_inode2fid(inode)), inode);
} else {
- lli->lli_fid = body->fid1;
+ lli->lli_fid = body->mbo_fid1;
}
}
- LASSERT(fid_seq(&lli->lli_fid) != 0);
+ LASSERT(fid_seq(&lli->lli_fid) != 0);
- if (body->valid & OBD_MD_FLSIZE) {
+ if (body->mbo_valid & OBD_MD_FLSIZE) {
if (exp_connect_som(ll_i2mdexp(inode)) &&
S_ISREG(inode->i_mode)) {
struct lustre_handle lockh;
} else {
/* Use old size assignment to avoid
* deadlock bz14138 & bz14326 */
- i_size_write(inode, body->size);
+ i_size_write(inode, body->mbo_size);
spin_lock(&lli->lli_lock);
lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
spin_unlock(&lli->lli_lock);
} else {
/* Use old size assignment to avoid
* deadlock bz14138 & bz14326 */
- i_size_write(inode, body->size);
+ i_size_write(inode, body->mbo_size);
CDEBUG(D_VFSTRACE,
"inode="DFID", updating i_size %llu\n",
PFID(ll_inode2fid(inode)),
- (unsigned long long)body->size);
- }
+ (unsigned long long)body->mbo_size);
+ }
- if (body->valid & OBD_MD_FLBLOCKS)
- inode->i_blocks = body->blocks;
- }
+ if (body->mbo_valid & OBD_MD_FLBLOCKS)
+ inode->i_blocks = body->mbo_blocks;
+ }
- if (body->valid & OBD_MD_FLMDSCAPA) {
- LASSERT(md->mds_capa);
- ll_add_capa(inode, md->mds_capa);
- }
- if (body->valid & OBD_MD_FLOSSCAPA) {
- LASSERT(md->oss_capa);
- ll_add_capa(inode, md->oss_capa);
- }
+ if (body->mbo_valid & OBD_MD_FLMDSCAPA) {
+ LASSERT(md->mds_capa);
+ ll_add_capa(inode, md->mds_capa);
+ }
- if (body->valid & OBD_MD_TSTATE) {
- if (body->t_state & MS_RESTORE)
+ if (body->mbo_valid & OBD_MD_FLOSSCAPA) {
+ LASSERT(md->oss_capa);
+ ll_add_capa(inode, md->oss_capa);
+ }
+
+ if (body->mbo_valid & OBD_MD_TSTATE) {
+ if (body->mbo_t_state & MS_RESTORE)
lli->lli_flags |= LLIF_FILE_RESTORING;
}
ENTRY;
if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
- /* discard all dirty pages before truncating them, required by
- * osc_extent implementation at LU-1030. */
- cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
- CL_FSYNC_DISCARD, 1);
-
- truncate_inode_pages(&inode->i_data, 0);
-
- /* Workaround for LU-118 */
- if (inode->i_data.nrpages) {
- spin_lock_irq(&inode->i_data.tree_lock);
- spin_unlock_irq(&inode->i_data.tree_lock);
- LASSERTF(inode->i_data.nrpages == 0,
- "inode="DFID"(%p) nrpages=%lu, see "
- "http://jira.whamcloud.com/browse/LU-118\n",
- PFID(ll_inode2fid(inode)), inode,
- inode->i_data.nrpages);
- }
- /* Workaround end */
+ /* It is last chance to write out dirty pages,
+ * otherwise we may lose data while umount */
+ cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
+
+ truncate_inode_pages_final(&inode->i_data);
+
+ LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
+ "see https://jira.hpdd.intel.com/browse/LU-118\n",
+ PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
#ifdef HAVE_SBOPS_EVICT_INODE
ll_clear_inode(inode);
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- flags = body->flags;
+ flags = body->mbo_flags;
ptlrpc_req_finished(req);
- RETURN(put_user(flags, (int *)arg));
+ RETURN(put_user(flags, (int __user *)arg));
}
case FSFILT_IOC_SETFLAGS: {
struct lov_stripe_md *lsm;
struct obd_info oinfo = { { { 0 } } };
struct md_op_data *op_data;
- if (get_user(flags, (int *)arg))
- RETURN(-EFAULT);
+ if (get_user(flags, (int __user *)arg))
+ RETURN(-EFAULT);
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));
- ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
+ op_data->op_attr_flags = flags;
op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
rc = md_setattr(sbi->ll_md_exp, op_data,
NULL, 0, NULL, 0, &req, NULL);
* At this point server returns to client's same fid as client
* generated for creating. So using ->fid1 is okay here.
*/
- LASSERT(fid_is_sane(&md.body->fid1));
+ LASSERT(fid_is_sane(&md.body->mbo_fid1));
- *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
+ *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
sbi->ll_flags & LL_SBI_32BIT_API),
&md);
if (IS_ERR(*inode)) {
RETURN(rc);
}
-int ll_obd_statfs(struct inode *inode, void *arg)
+int ll_obd_statfs(struct inode *inode, void __user *arg)
{
struct ll_sb_info *sbi = NULL;
struct obd_export *exp;
char *buf = NULL;
struct obd_ioctl_data *data = NULL;
__u32 type;
- __u32 flags;
+ __u32 __user flags; /* not user, but obd_iocontrol is abused */
int len = 0, rc;
if (!inode || !(sbi = ll_i2sbi(inode)))
/* Note we have not called client_common_fill_super yet, so
proc fns must be able to handle that! */
- rc = class_process_proc_seq_param(PARAM_LLITE, lprocfs_llite_obd_vars,
- lcfg, sb);
+ rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
+ lcfg, sb);
if (rc > 0)
rc = 0;
return rc;
/* this function prepares md_op_data hint for passing ot down to MD stack. */
struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
- struct inode *i1, struct inode *i2,
- const char *name, int namelen,
- int mode, __u32 opc, void *data)
+ struct inode *i1, struct inode *i2,
+ const char *name, size_t namelen,
+ __u32 mode, __u32 opc, void *data)
{
LASSERT(i1 != NULL);
op_data->op_bias = 0;
op_data->op_cli_flags = 0;
if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
- filename_is_volatile(name, namelen, NULL))
+ filename_is_volatile(name, namelen, &op_data->op_mds)) {
op_data->op_bias |= MDS_CREATE_VOLATILE;
- op_data->op_mds = 0;
- op_data->op_data = data;
-
- /* If the file is being opened after mknod() (normally due to NFS)
- * try to use the default stripe data from parent directory for
- * allocating OST objects. Try to pass the parent FID to MDS. */
- if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
- !ll_i2info(i2)->lli_has_smd) {
- struct ll_inode_info *lli = ll_i2info(i2);
-
- spin_lock(&lli->lli_lock);
- if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
- op_data->op_fid1 = lli->lli_pfid;
- spin_unlock(&lli->lli_lock);
- /** We ignore parent's capability temporary. */
+ } else {
+ op_data->op_mds = 0;
}
+ op_data->op_data = data;
/* When called by ll_setattr_raw, file is i1. */
if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
if (!obd)
RETURN(-ENOENT);
- if (copy_to_user((void *)arg, obd->obd_name,
+ if (copy_to_user((void __user *)arg, obd->obd_name,
strlen(obd->obd_name) + 1))
RETURN(-EFAULT);
free_page((unsigned long)buf);
}
+ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
+ struct lov_user_md **kbuf)
+{
+ struct lov_user_md lum;
+ ssize_t lum_size;
+ ENTRY;
+
+ if (copy_from_user(&lum, md, sizeof(lum)))
+ RETURN(-EFAULT);
+
+ lum_size = ll_lov_user_md_size(&lum);
+ if (lum_size < 0)
+ RETURN(lum_size);
+
+ OBD_ALLOC(*kbuf, lum_size);
+ if (*kbuf == NULL)
+ RETURN(-ENOMEM);
+
+ if (copy_from_user(*kbuf, md, lum_size) != 0) {
+ OBD_FREE(*kbuf, lum_size);
+ RETURN(-EFAULT);
+ }
+
+ RETURN(lum_size);
+}
+
/*
* Compute llite root squash state after a change of root squash
* configuration setting or add/remove of a lnet nid
up_write(&squash->rsi_sem);
}
+/**
+ * Parse linkea content to extract information about a given hardlink
+ *
+ * \param[in] ldata - Initialized linkea data
+ * \param[in] linkno - Link identifier
+ * \param[out] gpout - Destination structure to fill with linkno,
+ * parent FID and entry name
+ * \param[in] size - Size of the gp_name buffer in gpout
+ *
+ * \retval 0 on success
+ * \retval Appropriate negative error code on failure
+ */
+static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
+ struct getparent *gpout, size_t name_size)
+{
+ unsigned int idx;
+ struct lu_name ln;
+ int rc;
+ ENTRY;
+
+ rc = linkea_init(ldata);
+ if (rc < 0)
+ RETURN(rc);
+
+ if (linkno >= ldata->ld_leh->leh_reccount)
+ /* beyond last link */
+ RETURN(-ENODATA);
+
+ linkea_first_entry(ldata);
+ idx = 0;
+ while (ldata->ld_lee != NULL) {
+ linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, &ln,
+ &gpout->gp_fid);
+ if (idx == linkno)
+ break;
+
+ linkea_next_entry(ldata);
+ idx++;
+ }
+
+ if (idx < linkno)
+ RETURN(-ENODATA);
+
+ if (ln.ln_namelen >= name_size)
+ RETURN(-EOVERFLOW);
+
+ gpout->gp_linkno = linkno;
+ strlcpy(gpout->gp_name, ln.ln_name, name_size);
+ RETURN(0);
+}
+
+/**
+ * Get parent FID and name of an identified link. Operation is performed for
+ * a given link number, letting the caller iterate over linkno to list one or
+ * all links of an entry.
+ *
+ * \param[in] file - File descriptor against which to perform the operation
+ * \param[in,out] arg - User-filled structure containing the linkno to operate
+ * on and the available size. It is eventually filled with
+ * the requested information or left untouched on error
+ *
+ * \retval - 0 on success
+ * \retval - Appropriate negative error code on failure
+ */
+int ll_getparent(struct file *file, struct getparent __user *arg)
+{
+ struct dentry *dentry = file->f_dentry;
+ struct inode *inode = file->f_dentry->d_inode;
+ struct linkea_data *ldata;
+ struct lu_buf buf = LU_BUF_NULL;
+ struct getparent *gpout;
+ __u32 linkno;
+ __u32 name_size;
+ size_t out_size;
+ int rc;
+
+ ENTRY;
+
+ if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
+ !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
+ RETURN(-EPERM);
+
+ if (get_user(name_size, &arg->gp_name_size))
+ RETURN(-EFAULT);
+
+ if (get_user(linkno, &arg->gp_linkno))
+ RETURN(-EFAULT);
+
+ if (name_size > PATH_MAX)
+ RETURN(-EINVAL);
+
+ OBD_ALLOC(ldata, sizeof(*ldata));
+ if (ldata == NULL)
+ RETURN(-ENOMEM);
+
+ rc = linkea_data_new(ldata, &buf);
+ if (rc < 0)
+ GOTO(ldata_free, rc);
+
+ out_size = sizeof(*gpout) + name_size;
+ OBD_ALLOC(gpout, out_size);
+ if (gpout == NULL)
+ GOTO(lb_free, rc = -ENOMEM);
+ if (copy_from_user(gpout, arg, sizeof(*gpout)))
+ GOTO(gp_free, rc = -EFAULT);
+
+ rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
+ if (rc < 0)
+ GOTO(gp_free, rc);
+
+ rc = ll_linkea_decode(ldata, linkno, gpout, name_size);
+ if (rc < 0)
+ GOTO(gp_free, rc);
+
+ if (copy_to_user(arg, gpout, out_size))
+ GOTO(gp_free, rc = -EFAULT);
+
+gp_free:
+ OBD_FREE(gpout, out_size);
+lb_free:
+ lu_buf_free(&buf);
+ldata_free:
+ OBD_FREE(ldata, sizeof(*ldata));
+
+ RETURN(rc);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff