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afs: Make afs_mkdir() locally initialise a new directory's content

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Initialise a new directory's content when it is created by mkdir locally
rather than downloading the content from the server as we can predict what
it's going to look like.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20241216204124.3752367-29-dhowells@redhat.com
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
David Howells
2024-12-16 20:41:18 +00:00
committed by Christian Brauner
parent e2d46f2ec3
commit 836bb70bde
4 changed files with 55 additions and 0 deletions
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3
fs/afs/dir.c
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@@ -1264,6 +1264,7 @@ void afs_check_for_remote_deletion(struct afs_operation *op)
*/
static void afs_vnode_new_inode(struct afs_operation *op)
{
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
struct afs_vnode *vnode;
struct inode *inode;
@@ -1283,6 +1284,8 @@ static void afs_vnode_new_inode(struct afs_operation *op)
vnode = AFS_FS_I(inode);
set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags);
if (S_ISDIR(inode->i_mode))
afs_mkdir_init_dir(vnode, dvp->vnode);
if (!afs_op_error(op))
afs_cache_permit(vnode, op->key, vnode->cb_break, &vp->scb);
d_instantiate(op->dentry, inode);

49
fs/afs/dir_edit.c
View File

@@ -556,3 +556,52 @@ error:
0, 0, 0, 0, "..");
goto out;
}
/*
* Initialise a new directory. We need to fill in the "." and ".." entries.
*/
void afs_mkdir_init_dir(struct afs_vnode *dvnode, struct afs_vnode *parent_dvnode)
{
union afs_xdr_dir_block *meta;
struct afs_dir_iter iter = { .dvnode = dvnode };
union afs_xdr_dirent *de;
unsigned int slot = AFS_DIR_RESV_BLOCKS0;
loff_t i_size;
i_size = i_size_read(&dvnode->netfs.inode);
if (i_size != AFS_DIR_BLOCK_SIZE) {
afs_invalidate_dir(dvnode, afs_dir_invalid_edit_add_bad_size);
return;
}
meta = afs_dir_get_block(&iter, 0);
if (!meta)
return;
afs_edit_init_block(meta, meta, 0);
de = &meta->dirents[slot];
de->u.valid = 1;
de->u.vnode = htonl(dvnode->fid.vnode);
de->u.unique = htonl(dvnode->fid.unique);
memcpy(de->u.name, ".", 2);
trace_afs_edit_dir(dvnode, afs_edit_dir_for_mkdir, afs_edit_dir_mkdir, 0, slot,
dvnode->fid.vnode, dvnode->fid.unique, ".");
slot++;
de = &meta->dirents[slot];
de->u.valid = 1;
de->u.vnode = htonl(parent_dvnode->fid.vnode);
de->u.unique = htonl(parent_dvnode->fid.unique);
memcpy(de->u.name, "..", 3);
trace_afs_edit_dir(dvnode, afs_edit_dir_for_mkdir, afs_edit_dir_mkdir, 0, slot,
parent_dvnode->fid.vnode, parent_dvnode->fid.unique, "..");
afs_set_contig_bits(meta, AFS_DIR_RESV_BLOCKS0, 2);
meta->meta.alloc_ctrs[0] -= 2;
kunmap_local(meta);
netfs_single_mark_inode_dirty(&dvnode->netfs.inode);
set_bit(AFS_VNODE_DIR_VALID, &dvnode->flags);
set_bit(AFS_VNODE_DIR_READ, &dvnode->flags);
}

1
fs/afs/internal.h
View File

@@ -1078,6 +1078,7 @@ extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *
extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
void afs_edit_dir_update_dotdot(struct afs_vnode *vnode, struct afs_vnode *new_dvnode,
enum afs_edit_dir_reason why);
void afs_mkdir_init_dir(struct afs_vnode *dvnode, struct afs_vnode *parent_vnode);
/*
* dir_silly.c

2
include/trace/events/afs.h
View File

@@ -350,6 +350,7 @@ enum yfs_cm_operation {
EM(afs_dir_invalid_edit_add_no_slots, "edit-add-no-slots") \
EM(afs_dir_invalid_edit_add_too_many_blocks, "edit-add-too-many-blocks") \
EM(afs_dir_invalid_edit_get_block, "edit-get-block") \
EM(afs_dir_invalid_edit_mkdir, "edit-mkdir") \
EM(afs_dir_invalid_edit_rem_bad_size, "edit-rem-bad-size") \
EM(afs_dir_invalid_edit_rem_wrong_name, "edit-rem-wrong_name") \
EM(afs_dir_invalid_edit_upd_bad_size, "edit-upd-bad-size") \
@@ -371,6 +372,7 @@ enum yfs_cm_operation {
EM(afs_edit_dir_delete_error, "d_err ") \
EM(afs_edit_dir_delete_inval, "d_invl") \
EM(afs_edit_dir_delete_noent, "d_nent") \
EM(afs_edit_dir_mkdir, "mk_ent") \
EM(afs_edit_dir_update_dd, "u_ddot") \
EM(afs_edit_dir_update_error, "u_fail") \
EM(afs_edit_dir_update_inval, "u_invl") \