#include <linux/mm.h>
#include "../include/lustre/lustre_ioctl.h"
-#include "../include/lustre_lite.h"
#include "../include/lustre_ha.h"
#include "../include/lustre_dlm.h"
#include "../include/lprocfs_status.h"
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_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;
err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
KEY_CHECKSUM, sizeof(checksum), &checksum,
NULL);
+ if (err) {
+ CERROR("%s: Set checksum failed: rc = %d\n",
+ sbi->ll_dt_exp->exp_obd->obd_name, err);
+ goto out_root;
+ }
cl_sb_init(sb);
err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
KEY_CACHE_SET, sizeof(*sbi->ll_cache),
sbi->ll_cache, NULL);
+ if (err) {
+ CERROR("%s: Set cache_set failed: rc = %d\n",
+ sbi->ll_dt_exp->exp_obd->obd_name, err);
+ goto out_root;
+ }
sb->s_root = d_make_root(root);
if (!sb->s_root) {
return rc;
}
+/**
+ * Get the value of the default_easize parameter.
+ *
+ * \see client_obd::cl_default_mds_easize
+ *
+ * \param[in] sbi superblock info for this filesystem
+ * \param[out] lmmsize pointer to storage location for value
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on failure
+ */
int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
{
int size, rc;
return rc;
}
+/**
+ * Set the default_easize parameter to the given value.
+ *
+ * \see client_obd::cl_default_mds_easize
+ *
+ * \param[in] sbi superblock info for this filesystem
+ * \param[in] lmmsize the size to set
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on failure
+ */
+int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
+{
+ if (lmmsize < sizeof(struct lov_mds_md) ||
+ lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
+ return -EINVAL;
+
+ return obd_set_info_async(NULL, sbi->ll_md_exp,
+ sizeof(KEY_DEFAULT_EASIZE),
+ KEY_DEFAULT_EASIZE,
+ sizeof(int), &lmmsize, NULL);
+}
+
static void client_common_put_super(struct super_block *sb)
{
struct ll_sb_info *sbi = ll_s2sbi(sb);
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) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
+ }
}
}
*flags |= tmp;
goto next;
}
- tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
+ tmp = ll_set_opt("noflock", s1,
+ LL_SBI_FLOCK | LL_SBI_LOCALFLOCK);
if (tmp) {
*flags &= ~tmp;
goto next;
lli->lli_sai = NULL;
spin_lock_init(&lli->lli_sa_lock);
lli->lli_opendir_pid = 0;
+ lli->lli_sa_enabled = 0;
+ lli->lli_def_stripe_offset = -1;
} 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;
+ int next, force = 1, rc = 0;
+ long ccc_count;
CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
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),
+ !atomic_long_read(&sbi->ll_cache->ccc_unstable_nr),
&lwi);
}
- ccc_count = atomic_read(&sbi->ll_cache->ccc_unstable_nr);
+ ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
if (!force && rc != -EINTR)
- LASSERTF(!ccc_count, "count: %i\n", ccc_count);
+ LASSERTF(!ccc_count, "count: %li\n", ccc_count);
/* We need to set force before the lov_disconnect in
* lustre_common_put_super, since l_d cleans up osc's as well.
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);
/* 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);
}
}
- /*
- * Here is where the lsm is being initialized(fill lmo_info) after
- * client retrieve MD stripe information from MDT.
- */
- return md_update_lsm_md(ll_i2mdexp(inode), lsm, md->body,
- ll_md_blocking_ast);
+ return 0;
}
static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
#ifdef CONFIG_FS_POSIX_ACL
if (lli->lli_posix_acl) {
- LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
posix_acl_release(lli->lli_posix_acl);
lli->lli_posix_acl = NULL;
}
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);
rc = ll_som_update(inode, op_data);
else if (rc) {
CERROR("%s: inode "DFID" mdc truncate failed: rc = %d\n",
- ll_i2sbi(inode)->ll_md_exp->exp_obd->obd_name,
- PFID(ll_inode2fid(inode)), rc);
+ ll_i2sbi(inode)->ll_md_exp->exp_obd->obd_name,
+ PFID(ll_inode2fid(inode)), rc);
}
return rc;
}
attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
}
- /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
+ /* POSIX: check before ATTR_*TIME_SET set (from setattr_prepare) */
if (attr->ia_valid & TIMES_SET_FLAGS) {
if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
!capable(CFS_CAP_FOWNER))
{
int mode = d_inode(de)->i_mode;
- if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
- (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
+ if ((attr->ia_valid & (ATTR_CTIME | ATTR_SIZE | ATTR_MODE)) ==
+ (ATTR_CTIME | ATTR_SIZE | ATTR_MODE))
attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
- if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
- (ATTR_SIZE|ATTR_MODE)) &&
+ if (((attr->ia_valid & (ATTR_MODE | ATTR_FORCE | ATTR_SIZE)) ==
+ (ATTR_SIZE | ATTR_MODE)) &&
(((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
- (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
+ (((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) &&
!(attr->ia_mode & S_ISGID))))
attr->ia_valid |= ATTR_FORCE;
attr->ia_valid |= ATTR_KILL_SUID;
if ((attr->ia_valid & ATTR_MODE) &&
- ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
+ ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) &&
!(attr->ia_mode & S_ISGID) &&
!(attr->ia_valid & ATTR_KILL_SGID))
attr->ia_valid |= ATTR_KILL_SGID;
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) {
if (!lli->lli_has_smd &&
!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
}
#ifdef CONFIG_FS_POSIX_ACL
- if (body->valid & OBD_MD_FLACL) {
+ 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_atime = body->atime;
+ 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->valid & OBD_MD_FLMTIME) {
- if (body->mtime > LTIME_S(inode->i_mtime)) {
+ 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 %llu\n",
inode->i_ino, LTIME_S(inode->i_mtime),
- body->mtime);
- LTIME_S(inode->i_mtime) = body->mtime;
+ body->mbo_mtime);
+ LTIME_S(inode->i_mtime) = body->mbo_mtime;
}
- lli->lli_mtime = body->mtime;
+ lli->lli_mtime = body->mbo_mtime;
}
- if (body->valid & OBD_MD_FLCTIME) {
- if (body->ctime > LTIME_S(inode->i_ctime))
- LTIME_S(inode->i_ctime) = body->ctime;
- lli->lli_ctime = body->ctime;
+ 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->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);
+ 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->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_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);
- 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;
/* 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);
/* 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=%lu, updating i_size %llu\n",
- inode->i_ino, (unsigned long long)body->size);
+ inode->i_ino, (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_TSTATE) {
- if (body->t_state & MS_RESTORE)
+ if (body->mbo_valid & OBD_MD_TSTATE) {
+ if (body->mbo_t_state & MS_RESTORE)
lli->lli_flags |= LLIF_FILE_RESTORING;
}
* osc_extent implementation at LU-1030.
*/
cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
- CL_FSYNC_DISCARD, 1);
+ CL_FSYNC_LOCAL, 1);
truncate_inode_pages_final(&inode->i_data);
- /* 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 */
+ LASSERTF(!inode->i_data.nrpages,
+ "inode=" DFID "(%p) nrpages=%lu, see http://jira.whamcloud.com/browse/LU-118\n",
+ PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
ll_clear_inode(inode);
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);
if (!op_data)
return;
- op_data->op_fid1 = body->fid1;
- op_data->op_ioepoch = body->ioepoch;
- op_data->op_handle = body->handle;
+ op_data->op_fid1 = body->mbo_fid1;
+ op_data->op_ioepoch = body->mbo_ioepoch;
+ op_data->op_handle = body->mbo_handle;
op_data->op_mod_time = get_seconds();
md_close(exp, op_data, NULL, &close_req);
ptlrpc_req_finished(close_req);
* At this point server returns to client's same fid as client
* generated for creating. So using ->fid1 is okay here.
*/
- if (!fid_is_sane(&md.body->fid1)) {
+ if (!fid_is_sane(&md.body->mbo_fid1)) {
CERROR("%s: Fid is insane " DFID "\n",
ll_get_fsname(sb, NULL, 0),
- PFID(&md.body->fid1));
+ PFID(&md.body->mbo_fid1));
rc = -EINVAL;
goto out;
}
- *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)) {
/* 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)
+ const char *name, size_t namelen,
+ u32 mode, __u32 opc, void *data)
{
if (!name) {
/* Do not reuse namelen for something else. */
ll_i2gids(op_data->op_suppgids, i1, i2);
op_data->op_fid1 = *ll_inode2fid(i1);
- if (S_ISDIR(i1->i_mode))
+ op_data->op_default_stripe_offset = -1;
+ if (S_ISDIR(i1->i_mode)) {
op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
+ op_data->op_default_stripe_offset =
+ ll_i2info(i1)->lli_def_stripe_offset;
+ }
if (i2) {
op_data->op_fid2 = *ll_inode2fid(i2);
op_data->op_bias = 0;
op_data->op_cli_flags = 0;
if ((opc == LUSTRE_OPC_CREATE) && name &&
- 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;
+ else
+ 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);
- }
-
/* When called by ll_setattr_raw, file is i1. */
if (ll_i2info(i1)->lli_flags & LLIF_DATA_MODIFIED)
op_data->op_bias |= MDS_DATA_MODIFIED;
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;
+
+ if (copy_from_user(&lum, md, sizeof(lum))) {
+ lum_size = -EFAULT;
+ goto no_kbuf;
+ }
+
+ lum_size = ll_lov_user_md_size(&lum);
+ if (lum_size < 0)
+ goto no_kbuf;
+
+ *kbuf = kzalloc(lum_size, GFP_NOFS);
+ if (!*kbuf) {
+ lum_size = -ENOMEM;
+ goto no_kbuf;
+ }
+
+ if (copy_from_user(*kbuf, md, lum_size) != 0) {
+ kfree(*kbuf);
+ *kbuf = NULL;
+ lum_size = -EFAULT;
+ }
+no_kbuf:
+ 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] parent_fid - The entry's parent FID
+ * \param[in] size - Entry name destination buffer
+ *
+ * \retval 0 on success
+ * \retval Appropriate negative error code on failure
+ */
+static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
+ struct lu_fid *parent_fid, struct lu_name *ln)
+{
+ unsigned int idx;
+ int rc;
+
+ 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);
+ for (idx = 0; ldata->ld_lee; idx++) {
+ linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
+ parent_fid);
+ if (idx == linkno)
+ break;
+
+ linkea_next_entry(ldata);
+ }
+
+ if (idx < linkno)
+ return -ENODATA;
+
+ 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 inode *inode = file_inode(file);
+ struct linkea_data *ldata;
+ struct lu_fid parent_fid;
+ struct lu_buf buf = {
+ .lb_buf = NULL,
+ .lb_len = 0
+ };
+ struct lu_name ln;
+ u32 name_size;
+ u32 linkno;
+ int rc;
+
+ if (!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;
+
+ ldata = kzalloc(sizeof(*ldata), GFP_NOFS);
+ if (!ldata)
+ return -ENOMEM;
+
+ rc = linkea_data_new(ldata, &buf);
+ if (rc < 0)
+ goto ldata_free;
+
+ rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
+ buf.lb_len, OBD_MD_FLXATTR);
+ if (rc < 0)
+ goto lb_free;
+
+ rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
+ if (rc < 0)
+ goto lb_free;
+
+ if (ln.ln_namelen >= name_size) {
+ rc = -EOVERFLOW;
+ goto lb_free;
+ }
+
+ if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid))) {
+ rc = -EFAULT;
+ goto lb_free;
+ }
+
+ if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen)) {
+ rc = -EFAULT;
+ goto lb_free;
+ }
+
+ if (put_user('\0', arg->gp_name + ln.ln_namelen)) {
+ rc = -EFAULT;
+ goto lb_free;
+ }
+
+lb_free:
+ lu_buf_free(&buf);
+ldata_free:
+ kfree(ldata);
+ return rc;
+}
projects / cascardo / linux.git / blobdiff