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orangefs: implement statx

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Fortunately OrangeFS has had a getattr request mask for a long time.

The server basically has two difficulty levels for attributes.  Fetching
any attribute except size requires communicating with the metadata
server for that handle.  Since all the attributes are right there, it
makes sense to return them all.  Fetching the size requires
communicating with every I/O server (that the file is distributed
across).  Therefore if asked for anything except size, get everything
except size, and if asked for size, get everything.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Martin Brandenburg
2017-04-25 15:38:03 -04:00
committed by Mike Marshall
parent 7b796ae370
commit 68a24a6cc4
5 changed files with 64 additions and 28 deletions
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63
fs/orangefs/orangefs-utils.c
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@@ -251,7 +251,8 @@ static int orangefs_inode_is_stale(struct inode *inode, int new,
return 0;
}
int orangefs_inode_getattr(struct inode *inode, int new, int bypass)
int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
u32 request_mask)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
struct orangefs_kernel_op_s *new_op;
@@ -262,7 +263,13 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass)
get_khandle_from_ino(inode));
if (!new && !bypass) {
if (time_before(jiffies, orangefs_inode->getattr_time))
/*
* Must have all the attributes in the mask and be within cache
* time.
*/
if ((request_mask & orangefs_inode->getattr_mask) ==
request_mask &&
time_before(jiffies, orangefs_inode->getattr_time))
return 0;
}
@@ -270,7 +277,15 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass)
if (!new_op)
return -ENOMEM;
new_op->upcall.req.getattr.refn = orangefs_inode->refn;
new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
/*
* Size is the hardest attribute to get. The incremental cost of any
* other attribute is essentially zero.
*/
if (request_mask & STATX_SIZE || new)
new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
else
new_op->upcall.req.getattr.mask =
ORANGEFS_ATTR_SYS_ALL_NOHINT & ~ORANGEFS_ATTR_SYS_SIZE;
ret = service_operation(new_op, __func__,
get_interruptible_flag(inode));
@@ -291,25 +306,29 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass)
case S_IFREG:
inode->i_flags = orangefs_inode_flags(&new_op->
downcall.resp.getattr.attributes);
inode_size = (loff_t)new_op->
downcall.resp.getattr.attributes.size;
rounded_up_size =
(inode_size + (4096 - (inode_size % 4096)));
inode->i_size = inode_size;
orangefs_inode->blksize =
new_op->downcall.resp.getattr.attributes.blksize;
spin_lock(&inode->i_lock);
inode->i_bytes = inode_size;
inode->i_blocks =
(unsigned long)(rounded_up_size / 512);
spin_unlock(&inode->i_lock);
if (request_mask & STATX_SIZE || new) {
inode_size = (loff_t)new_op->
downcall.resp.getattr.attributes.size;
rounded_up_size =
(inode_size + (4096 - (inode_size % 4096)));
inode->i_size = inode_size;
orangefs_inode->blksize =
new_op->downcall.resp.getattr.attributes.blksize;
spin_lock(&inode->i_lock);
inode->i_bytes = inode_size;
inode->i_blocks =
(unsigned long)(rounded_up_size / 512);
spin_unlock(&inode->i_lock);
}
break;
case S_IFDIR:
inode->i_size = PAGE_SIZE;
orangefs_inode->blksize = i_blocksize(inode);
spin_lock(&inode->i_lock);
inode_set_bytes(inode, inode->i_size);
spin_unlock(&inode->i_lock);
if (request_mask & STATX_SIZE || new) {
inode->i_size = PAGE_SIZE;
orangefs_inode->blksize = i_blocksize(inode);
spin_lock(&inode->i_lock);
inode_set_bytes(inode, inode->i_size);
spin_unlock(&inode->i_lock);
}
set_nlink(inode, 1);
break;
case S_IFLNK:
@@ -349,6 +368,10 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass)
orangefs_inode->getattr_time = jiffies +
orangefs_getattr_timeout_msecs*HZ/1000;
if (request_mask & STATX_SIZE || new)
orangefs_inode->getattr_mask = STATX_BASIC_STATS;
else
orangefs_inode->getattr_mask = STATX_BASIC_STATS & ~STATX_SIZE;
ret = 0;
out:
op_release(new_op);