diff options
Diffstat (limited to 'fs/nfs/callback_proc.c')
| -rw-r--r-- | fs/nfs/callback_proc.c | 119 |
1 files changed, 118 insertions, 1 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index c1bb157e94bd..6619c05b55a0 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -12,6 +12,7 @@ #include "callback.h" #include "delegation.h" #include "internal.h" +#include "pnfs.h" #ifdef NFS_DEBUG #define NFSDBG_FACILITY NFSDBG_CALLBACK @@ -107,10 +108,126 @@ int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nf #if defined(CONFIG_NFS_V4_1) +static u32 initiate_file_draining(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + struct pnfs_layout_hdr *lo; + struct inode *ino; + bool found = false; + u32 rv = NFS4ERR_NOMATCHING_LAYOUT; + LIST_HEAD(free_me_list); + + spin_lock(&clp->cl_lock); + list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { + if (nfs_compare_fh(&args->cbl_fh, + &NFS_I(lo->plh_inode)->fh)) + continue; + ino = igrab(lo->plh_inode); + if (!ino) + continue; + found = true; + /* Without this, layout can be freed as soon + * as we release cl_lock. + */ + get_layout_hdr(lo); + break; + } + spin_unlock(&clp->cl_lock); + if (!found) + return NFS4ERR_NOMATCHING_LAYOUT; + + spin_lock(&ino->i_lock); + if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || + mark_matching_lsegs_invalid(lo, &free_me_list, + args->cbl_range.iomode)) + rv = NFS4ERR_DELAY; + else + rv = NFS4ERR_NOMATCHING_LAYOUT; + pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&free_me_list); + put_layout_hdr(lo); + iput(ino); + return rv; +} + +static u32 initiate_bulk_draining(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + struct pnfs_layout_hdr *lo; + struct inode *ino; + u32 rv = NFS4ERR_NOMATCHING_LAYOUT; + struct pnfs_layout_hdr *tmp; + LIST_HEAD(recall_list); + LIST_HEAD(free_me_list); + struct pnfs_layout_range range = { + .iomode = IOMODE_ANY, + .offset = 0, + .length = NFS4_MAX_UINT64, + }; + + spin_lock(&clp->cl_lock); + list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { + if ((args->cbl_recall_type == RETURN_FSID) && + memcmp(&NFS_SERVER(lo->plh_inode)->fsid, + &args->cbl_fsid, sizeof(struct nfs_fsid))) + continue; + if (!igrab(lo->plh_inode)) + continue; + get_layout_hdr(lo); + BUG_ON(!list_empty(&lo->plh_bulk_recall)); + list_add(&lo->plh_bulk_recall, &recall_list); + } + spin_unlock(&clp->cl_lock); + list_for_each_entry_safe(lo, tmp, + &recall_list, plh_bulk_recall) { + ino = lo->plh_inode; + spin_lock(&ino->i_lock); + set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); + if (mark_matching_lsegs_invalid(lo, &free_me_list, range.iomode)) + rv = NFS4ERR_DELAY; + list_del_init(&lo->plh_bulk_recall); + spin_unlock(&ino->i_lock); + put_layout_hdr(lo); + iput(ino); + } + pnfs_free_lseg_list(&free_me_list); + return rv; +} + +static u32 do_callback_layoutrecall(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + u32 res = NFS4ERR_DELAY; + + dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); + if (test_and_set_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state)) + goto out; + if (args->cbl_recall_type == RETURN_FILE) + res = initiate_file_draining(clp, args); + else + res = initiate_bulk_draining(clp, args); + clear_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state); +out: + dprintk("%s returning %i\n", __func__, res); + return res; + +} + __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, void *dummy, struct cb_process_state *cps) { - return cpu_to_be32(NFS4ERR_NOTSUPP); /* STUB */ + u32 res; + + dprintk("%s: -->\n", __func__); + + if (cps->clp) + res = do_callback_layoutrecall(cps->clp, args); + else + res = NFS4ERR_OP_NOT_IN_SESSION; + + dprintk("%s: exit with status = %d\n", __func__, res); + return cpu_to_be32(res); } int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) |