diff options
Diffstat (limited to 'netfs.c')
| -rw-r--r-- | netfs.c | 42 |
1 files changed, 33 insertions, 9 deletions
@@ -24,6 +24,28 @@ char *netfs_server_version = PROCFS_SERVER_VERSION; /* Maximum number of symlinks to follow before returning ELOOP. */ int netfs_maxsymlinks = PROCFS_MAXSYMLINKS; +/* The user must define this function. Make sure that NP->nn_stat is + filled with the most current information. CRED identifies the user + responsible for the operation. NP is locked. */ +error_t netfs_validate_stat (struct node *np, struct iouser *cred) +{ + void *contents; + size_t contents_len; + error_t err; + + /* Only symlinks need to have their size filled, before a read is + attempted. */ + if (! S_ISLNK (np->nn_stat.st_mode)) + return 0; + + err = procfs_get_contents (np, &contents, &contents_len); + if (err) + return err; + + np->nn_stat.st_size = contents_len; + return 0; +} + /* The user must define this function. Read from the locked file NP for user CRED starting at OFFSET and continuing for up to *LEN bytes. Put the data at DATA. Set *LEN to the amount successfully @@ -56,7 +78,17 @@ error_t netfs_attempt_read (struct iouser *cred, struct node *np, error_t netfs_attempt_readlink (struct iouser *user, struct node *np, char *buf) { - return EIO; + char *contents; + size_t contents_len; + error_t err; + + err = procfs_get_contents (np, (void **) &contents, &contents_len); + if (err) + return err; + + assert (contents_len == np->nn_stat.st_size); + memcpy (buf, contents, contents_len); + return 0; } /* Helper function for netfs_get_dirents() below. CONTENTS is an argz @@ -210,14 +242,6 @@ error_t netfs_report_access (struct iouser *cred, struct node *np, /* Trivial or unsupported libnetfs callbacks. */ -/* The user must define this function. Make sure that NP->nn_stat is - filled with the most current information. CRED identifies the user - responsible for the operation. NP is locked. */ -error_t netfs_validate_stat (struct node *np, struct iouser *cred) -{ - return 0; -} - /* The user must define this function. This should attempt a chmod call for the user specified by CRED on locked node NP, to change the owner to UID and the group to GID. */ |