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Subject[PATCH 02/14] staging: lustre: llite: refactor lustre.lov xattr handling
Date
From: Niu Yawei <yawei.niu@intel.com>

The function ll_xattr_set() contains special code to handle
the lustre specific xattr lustre.lov. Move all this code to
a new function ll_setstripe_ea().

Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8998
Reviewed-on: https://review.whamcloud.com/24851
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
drivers/staging/lustre/lustre/llite/xattr.c | 131 +++++++++++++++-------------
1 file changed, 69 insertions(+), 62 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index 56f42b8..fb53942 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -183,6 +183,73 @@ static int get_hsm_state(struct inode *inode, u32 *hus_states)
return rc;
}

+static int ll_setstripe_ea(struct dentry *dentry, struct lov_user_md *lump,
+ size_t size)
+{
+ struct inode *inode = d_inode(dentry);
+ int rc = 0;
+
+ if (size != 0 && size < sizeof(struct lov_user_md))
+ return -EINVAL;
+
+ /*
+ * It is possible to set an xattr to a "" value of zero size.
+ * For this case we are going to treat it as a removal.
+ */
+ if (!size && lump)
+ lump = NULL;
+
+ /* Attributes that are saved via getxattr will always have
+ * the stripe_offset as 0. Instead, the MDS should be
+ * allowed to pick the starting OST index. b=17846
+ */
+ if (lump && lump->lmm_stripe_offset == 0)
+ lump->lmm_stripe_offset = -1;
+
+ /* Avoid anyone directly setting the RELEASED flag. */
+ if (lump && (lump->lmm_pattern & LOV_PATTERN_F_RELEASED)) {
+ /* Only if we have a released flag check if the file
+ * was indeed archived.
+ */
+ u32 state = HS_NONE;
+
+ rc = get_hsm_state(inode, &state);
+ if (rc)
+ return rc;
+
+ if (!(state & HS_ARCHIVED)) {
+ CDEBUG(D_VFSTRACE,
+ "hus_states state = %x, pattern = %x\n",
+ state, lump->lmm_pattern);
+ /*
+ * Here the state is: real file is not
+ * archived but user is requesting to set
+ * the RELEASED flag so we mask off the
+ * released flag from the request
+ */
+ lump->lmm_pattern ^= LOV_PATTERN_F_RELEASED;
+ }
+ }
+
+ if (lump && S_ISREG(inode->i_mode)) {
+ __u64 it_flags = FMODE_WRITE;
+ 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);
+ /* 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);
+ }
+
+ return rc;
+}
+
static int ll_xattr_set(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
const char *name, const void *value, size_t size,
@@ -195,73 +262,13 @@ static int ll_xattr_set(const struct xattr_handler *handler,
PFID(ll_inode2fid(inode)), inode, name);

if (!strcmp(name, "lov")) {
- struct lov_user_md *lump = (struct lov_user_md *)value;
int op_type = flags == XATTR_REPLACE ? LPROC_LL_REMOVEXATTR :
LPROC_LL_SETXATTR;
- int rc = 0;

ll_stats_ops_tally(ll_i2sbi(inode), op_type, 1);

- if (size != 0 && size < sizeof(struct lov_user_md))
- return -EINVAL;
-
- /*
- * It is possible to set an xattr to a "" value of zero size.
- * For this case we are going to treat it as a removal.
- */
- if (!size && lump)
- lump = NULL;
-
- /* Attributes that are saved via getxattr will always have
- * the stripe_offset as 0. Instead, the MDS should be
- * allowed to pick the starting OST index. b=17846
- */
- if (lump && lump->lmm_stripe_offset == 0)
- lump->lmm_stripe_offset = -1;
-
- /* Avoid anyone directly setting the RELEASED flag. */
- if (lump && (lump->lmm_pattern & LOV_PATTERN_F_RELEASED)) {
- /* Only if we have a released flag check if the file
- * was indeed archived.
- */
- u32 state = HS_NONE;
-
- rc = get_hsm_state(inode, &state);
- if (rc)
- return rc;
-
- if (!(state & HS_ARCHIVED)) {
- CDEBUG(D_VFSTRACE,
- "hus_states state = %x, pattern = %x\n",
- state, lump->lmm_pattern);
- /*
- * Here the state is: real file is not
- * archived but user is requesting to set
- * the RELEASED flag so we mask off the
- * released flag from the request
- */
- lump->lmm_pattern ^= LOV_PATTERN_F_RELEASED;
- }
- }
-
- if (lump && S_ISREG(inode->i_mode)) {
- __u64 it_flags = FMODE_WRITE;
- 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);
- /* 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);
- }
-
- return rc;
-
+ return ll_setstripe_ea(dentry, (struct lov_user_md *)value,
+ size);
} else if (!strcmp(name, "lma") || !strcmp(name, "link")) {
ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
return 0;
--
1.8.3.1
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