diff options
| -rw-r--r-- | fs/afs/cell.c | 26 | ||||
| -rw-r--r-- | fs/afs/proc.c | 14 |
2 files changed, 33 insertions, 7 deletions
diff --git a/fs/afs/cell.c b/fs/afs/cell.c index 963b6fa51fdf..cf445dbd5f2e 100644 --- a/fs/afs/cell.c +++ b/fs/afs/cell.c @@ -20,6 +20,8 @@ #include "internal.h" static unsigned __read_mostly afs_cell_gc_delay = 10; +static unsigned __read_mostly afs_cell_min_ttl = 10 * 60; +static unsigned __read_mostly afs_cell_max_ttl = 24 * 60 * 60; static void afs_manage_cell(struct work_struct *); @@ -171,6 +173,8 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net, rcu_assign_pointer(cell->vl_servers, vllist); cell->dns_expiry = TIME64_MAX; + } else { + cell->dns_expiry = ktime_get_real_seconds(); } _leave(" = %p", cell); @@ -358,25 +362,39 @@ int afs_cell_init(struct afs_net *net, const char *rootcell) static void afs_update_cell(struct afs_cell *cell) { struct afs_vlserver_list *vllist, *old; - time64_t now, expiry; + unsigned int min_ttl = READ_ONCE(afs_cell_min_ttl); + unsigned int max_ttl = READ_ONCE(afs_cell_max_ttl); + time64_t now, expiry = 0; _enter("%s", cell->name); vllist = afs_dns_query(cell, &expiry); + + now = ktime_get_real_seconds(); + if (min_ttl > max_ttl) + max_ttl = min_ttl; + if (expiry < now + min_ttl) + expiry = now + min_ttl; + else if (expiry > now + max_ttl) + expiry = now + max_ttl; + if (IS_ERR(vllist)) { switch (PTR_ERR(vllist)) { case -ENODATA: - /* The DNS said that the cell does not exist */ + case -EDESTADDRREQ: + /* The DNS said that the cell does not exist or there + * weren't any addresses to be had. + */ set_bit(AFS_CELL_FL_NOT_FOUND, &cell->flags); clear_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags); - cell->dns_expiry = ktime_get_real_seconds() + 61; + cell->dns_expiry = expiry; break; case -EAGAIN: case -ECONNREFUSED: default: set_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags); - cell->dns_expiry = ktime_get_real_seconds() + 10; + cell->dns_expiry = now + 10; break; } diff --git a/fs/afs/proc.c b/fs/afs/proc.c index 6585f4bec0d3..fc36c41641ab 100644 --- a/fs/afs/proc.c +++ b/fs/afs/proc.c @@ -37,16 +37,24 @@ static inline struct afs_net *afs_seq2net_single(struct seq_file *m) */ static int afs_proc_cells_show(struct seq_file *m, void *v) { - struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link); + struct afs_vlserver_list *vllist; + struct afs_cell *cell; if (v == SEQ_START_TOKEN) { /* display header on line 1 */ - seq_puts(m, "USE NAME\n"); + seq_puts(m, "USE TTL SV NAME\n"); return 0; } + cell = list_entry(v, struct afs_cell, proc_link); + vllist = rcu_dereference(cell->vl_servers); + /* display one cell per line on subsequent lines */ - seq_printf(m, "%3u %s\n", atomic_read(&cell->usage), cell->name); + seq_printf(m, "%3u %6lld %2u %s\n", + atomic_read(&cell->usage), + cell->dns_expiry - ktime_get_real_seconds(), + vllist ? vllist->nr_servers : 0, + cell->name); return 0; } |