#define LOV_MAGIC_JOIN_V1 (0x0BD20000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC_V3 (0x0BD30000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC_MIGRATE (0x0BD40000 | LOV_MAGIC_MAGIC)
+/* reserved for specifying OSTs */
+#define LOV_MAGIC_SPECIFIC (0x0BD50000 | LOV_MAGIC_MAGIC)
#define LOV_MAGIC LOV_MAGIC_V1
/*
#define LL_FILE_LOCKLESS_IO 0x00000010 /* server-side locks with cio */
#define LL_FILE_RMTACL 0x00000020
-#define LOV_USER_MAGIC_V1 0x0BD10BD0
-#define LOV_USER_MAGIC LOV_USER_MAGIC_V1
-#define LOV_USER_MAGIC_JOIN_V1 0x0BD20BD0
-#define LOV_USER_MAGIC_V3 0x0BD30BD0
+#define LOV_USER_MAGIC_V1 0x0BD10BD0
+#define LOV_USER_MAGIC LOV_USER_MAGIC_V1
+#define LOV_USER_MAGIC_JOIN_V1 0x0BD20BD0
+#define LOV_USER_MAGIC_V3 0x0BD30BD0
+/* 0x0BD40BD0 is occupied by LOV_MAGIC_MIGRATE */
+#define LOV_USER_MAGIC_SPECIFIC 0x0BD50BD0 /* for specific OSTs */
#define LMV_USER_MAGIC 0x0CD30CD0 /*default lmv magic*/
static inline __u32 lov_user_md_size(__u16 stripes, __u32 lmm_magic)
{
- if (lmm_magic == LOV_USER_MAGIC_V3)
- return sizeof(struct lov_user_md_v3) +
- stripes * sizeof(struct lov_user_ost_data_v1);
- else
+ if (lmm_magic == LOV_USER_MAGIC_V1)
return sizeof(struct lov_user_md_v1) +
stripes * sizeof(struct lov_user_ost_data_v1);
+ return sizeof(struct lov_user_md_v3) +
+ stripes * sizeof(struct lov_user_ost_data_v1);
}
/* Compile with -D_LARGEFILE64_SOURCE or -D_GNU_SOURCE (or #define) to
static int ll_lov_setstripe(struct inode *inode, struct file *file,
unsigned long arg)
{
- struct lov_user_md_v3 lumv3;
- struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
- struct lov_user_md_v1 __user *lumv1p = (void __user *)arg;
- struct lov_user_md_v3 __user *lumv3p = (void __user *)arg;
+ struct lov_user_md __user *lum = (struct lov_user_md __user *)arg;
+ struct lov_user_md *klum;
int lum_size, rc;
__u64 flags = FMODE_WRITE;
- /* first try with v1 which is smaller than v3 */
- lum_size = sizeof(struct lov_user_md_v1);
- if (copy_from_user(lumv1, lumv1p, lum_size))
- return -EFAULT;
-
- if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
- lum_size = sizeof(struct lov_user_md_v3);
- if (copy_from_user(&lumv3, lumv3p, lum_size))
- return -EFAULT;
- }
+ rc = ll_copy_user_md(lum, &klum);
+ if (rc < 0)
+ return rc;
- rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, lumv1,
+ lum_size = rc;
+ rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, klum,
lum_size);
cl_lov_delay_create_clear(&file->f_flags);
if (rc == 0) {
struct lov_stripe_md *lsm;
__u32 gen;
- put_user(0, &lumv1p->lmm_stripe_count);
+ put_user(0, &lum->lmm_stripe_count);
ll_layout_refresh(inode, &gen);
lsm = ccc_inode_lsm_get(inode);
rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode),
- 0, lsm, (void __user *)arg);
+ 0, lsm, lum);
ccc_inode_lsm_put(inode, lsm);
}
+
+ kfree(klum);
return rc;
}
char *ll_get_fsname(struct super_block *sb, char *buf, int buflen);
void ll_compute_rootsquash_state(struct ll_sb_info *sbi);
void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req);
+ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
+ struct lov_user_md **kbuf);
+
+/* Compute expected user md size when passing in a md from user space */
+static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum)
+{
+ switch (lum->lmm_magic) {
+ case LOV_USER_MAGIC_V1:
+ return sizeof(struct lov_user_md_v1);
+ case LOV_USER_MAGIC_V3:
+ return sizeof(struct lov_user_md_v3);
+ case LOV_USER_MAGIC_SPECIFIC:
+ if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
+ return -EINVAL;
+
+ return lov_user_md_size(lum->lmm_stripe_count,
+ LOV_USER_MAGIC_SPECIFIC);
+ }
+ return -EINVAL;
+}
/* llite/llite_nfs.c */
extern const struct export_operations lustre_export_operations;
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
if (lump && S_ISREG(inode->i_mode)) {
__u64 it_flags = FMODE_WRITE;
- int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
- sizeof(*lump) : sizeof(struct lov_user_md_v3);
+ int lum_size;
+
+ lum_size = ll_lov_user_md_size(lump);
+ if (lum_size < 0 || size < lum_size)
+ return 0; /* b=10667: ignore error */
rc = ll_lov_setstripe_ea_info(inode, dentry, it_flags,
lump, lum_size);
- /* b10667: rc always be 0 here for now */
+ /* b=10667: rc always be 0 here for now */
rc = 0;
} else if (S_ISDIR(inode->i_mode)) {
rc = ll_dir_setstripe(inode, lump, 0);
stripe_count = 0;
}
} else {
- /* No need to allocate more than maximum supported stripes.
- * Anyway, this is pretty inaccurate since ld_tgt_count now
- * represents max index and we should rely on the actual number
- * of OSTs instead
+ /*
+ * To calculate maximum easize by active targets at present,
+ * which is exactly the maximum easize to be seen by LOV
*/
- stripe_count = lov_mds_md_max_stripe_count(
- lov->lov_ocd.ocd_max_easize, lmm_magic);
-
- if (stripe_count > lov->desc.ld_tgt_count)
- stripe_count = lov->desc.ld_tgt_count;
+ stripe_count = lov->desc.ld_active_tgt_count;
}
/* XXX LOV STACKING call into osc for sizes */
rc = -EFAULT;
goto out_set;
}
- if ((lum.lmm_magic != LOV_USER_MAGIC) &&
- (lum.lmm_magic != LOV_USER_MAGIC_V3)) {
+ if (lum.lmm_magic != LOV_USER_MAGIC_V1 &&
+ lum.lmm_magic != LOV_USER_MAGIC_V3 &&
+ lum.lmm_magic != LOV_USER_MAGIC_SPECIFIC) {
rc = -EINVAL;
goto out_set;
}
}
EXPORT_SYMBOL(lustre_swab_lmv_user_md);
-static void print_lum(struct lov_user_md *lum)
-{
- CDEBUG(D_OTHER, "lov_user_md %p:\n", lum);
- CDEBUG(D_OTHER, "\tlmm_magic: %#x\n", lum->lmm_magic);
- CDEBUG(D_OTHER, "\tlmm_pattern: %#x\n", lum->lmm_pattern);
- CDEBUG(D_OTHER, "\tlmm_object_id: %llu\n", lmm_oi_id(&lum->lmm_oi));
- CDEBUG(D_OTHER, "\tlmm_object_gr: %llu\n", lmm_oi_seq(&lum->lmm_oi));
- CDEBUG(D_OTHER, "\tlmm_stripe_size: %#x\n", lum->lmm_stripe_size);
- CDEBUG(D_OTHER, "\tlmm_stripe_count: %#x\n", lum->lmm_stripe_count);
- CDEBUG(D_OTHER, "\tlmm_stripe_offset/lmm_layout_gen: %#x\n",
- lum->lmm_stripe_offset);
-}
-
static void lustre_swab_lmm_oi(struct ost_id *oi)
{
__swab64s(&oi->oi.oi_id);
__swab32s(&lum->lmm_stripe_size);
__swab16s(&lum->lmm_stripe_count);
__swab16s(&lum->lmm_stripe_offset);
- print_lum(lum);
}
void lustre_swab_lov_user_md_v1(struct lov_user_md_v1 *lum)
projects / cascardo / linux.git / commitdiff