diff options
Diffstat (limited to 'fs/nfs_common/common.c')
| -rw-r--r-- | fs/nfs_common/common.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/fs/nfs_common/common.c b/fs/nfs_common/common.c new file mode 100644 index 000000000000..af09aed09fd2 --- /dev/null +++ b/fs/nfs_common/common.c @@ -0,0 +1,201 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/module.h> +#include <linux/nfs_common.h> +#include <linux/nfs4.h> + +/* + * We need to translate between nfs status return values and + * the local errno values which may not be the same. + */ +static const struct { + int stat; + int errno; +} nfs_errtbl[] = { + { NFS_OK, 0 }, + { NFSERR_PERM, -EPERM }, + { NFSERR_NOENT, -ENOENT }, + { NFSERR_IO, -EIO }, + { NFSERR_NXIO, -ENXIO }, +/* { NFSERR_EAGAIN, -EAGAIN }, */ + { NFSERR_ACCES, -EACCES }, + { NFSERR_EXIST, -EEXIST }, + { NFSERR_XDEV, -EXDEV }, + { NFSERR_NODEV, -ENODEV }, + { NFSERR_NOTDIR, -ENOTDIR }, + { NFSERR_ISDIR, -EISDIR }, + { NFSERR_INVAL, -EINVAL }, + { NFSERR_FBIG, -EFBIG }, + { NFSERR_NOSPC, -ENOSPC }, + { NFSERR_ROFS, -EROFS }, + { NFSERR_MLINK, -EMLINK }, + { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, + { NFSERR_NOTEMPTY, -ENOTEMPTY }, + { NFSERR_DQUOT, -EDQUOT }, + { NFSERR_STALE, -ESTALE }, + { NFSERR_REMOTE, -EREMOTE }, +#ifdef EWFLUSH + { NFSERR_WFLUSH, -EWFLUSH }, +#endif + { NFSERR_BADHANDLE, -EBADHANDLE }, + { NFSERR_NOT_SYNC, -ENOTSYNC }, + { NFSERR_BAD_COOKIE, -EBADCOOKIE }, + { NFSERR_NOTSUPP, -ENOTSUPP }, + { NFSERR_TOOSMALL, -ETOOSMALL }, + { NFSERR_SERVERFAULT, -EREMOTEIO }, + { NFSERR_BADTYPE, -EBADTYPE }, + { NFSERR_JUKEBOX, -EJUKEBOX }, +}; + +/** + * nfs_stat_to_errno - convert an NFS status code to a local errno + * @status: NFS status code to convert + * + * Returns a local errno value, or -EIO if the NFS status code is + * not recognized. This function is used jointly by NFSv2 and NFSv3. + */ +int nfs_stat_to_errno(enum nfs_stat status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { + if (nfs_errtbl[i].stat == (int)status) + return nfs_errtbl[i].errno; + } + return -EIO; +} +EXPORT_SYMBOL_GPL(nfs_stat_to_errno); + +/* + * We need to translate between nfs v4 status return values and + * the local errno values which may not be the same. + * + * nfs4_errtbl_common[] is used before more specialized mappings + * available in nfs4_errtbl[] or nfs4_errtbl_localio[]. + */ +static const struct { + int stat; + int errno; +} nfs4_errtbl_common[] = { + { NFS4_OK, 0 }, + { NFS4ERR_PERM, -EPERM }, + { NFS4ERR_NOENT, -ENOENT }, + { NFS4ERR_IO, -EIO }, + { NFS4ERR_NXIO, -ENXIO }, + { NFS4ERR_ACCESS, -EACCES }, + { NFS4ERR_EXIST, -EEXIST }, + { NFS4ERR_XDEV, -EXDEV }, + { NFS4ERR_NOTDIR, -ENOTDIR }, + { NFS4ERR_ISDIR, -EISDIR }, + { NFS4ERR_INVAL, -EINVAL }, + { NFS4ERR_FBIG, -EFBIG }, + { NFS4ERR_NOSPC, -ENOSPC }, + { NFS4ERR_ROFS, -EROFS }, + { NFS4ERR_MLINK, -EMLINK }, + { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG }, + { NFS4ERR_NOTEMPTY, -ENOTEMPTY }, + { NFS4ERR_DQUOT, -EDQUOT }, + { NFS4ERR_STALE, -ESTALE }, + { NFS4ERR_BADHANDLE, -EBADHANDLE }, + { NFS4ERR_BAD_COOKIE, -EBADCOOKIE }, + { NFS4ERR_NOTSUPP, -ENOTSUPP }, + { NFS4ERR_TOOSMALL, -ETOOSMALL }, + { NFS4ERR_BADTYPE, -EBADTYPE }, + { NFS4ERR_SYMLINK, -ELOOP }, + { NFS4ERR_DEADLOCK, -EDEADLK }, +}; + +static const struct { + int stat; + int errno; +} nfs4_errtbl[] = { + { NFS4ERR_SERVERFAULT, -EREMOTEIO }, + { NFS4ERR_LOCKED, -EAGAIN }, + { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP }, + { NFS4ERR_NOXATTR, -ENODATA }, + { NFS4ERR_XATTR2BIG, -E2BIG }, +}; + +/* + * Convert an NFS error code to a local one. + * This one is used by NFSv4. + */ +int nfs4_stat_to_errno(int stat) +{ + int i; + + /* First check nfs4_errtbl_common */ + for (i = 0; i < ARRAY_SIZE(nfs4_errtbl_common); i++) { + if (nfs4_errtbl_common[i].stat == stat) + return nfs4_errtbl_common[i].errno; + } + /* Then check nfs4_errtbl */ + for (i = 0; i < ARRAY_SIZE(nfs4_errtbl); i++) { + if (nfs4_errtbl[i].stat == stat) + return nfs4_errtbl[i].errno; + } + if (stat <= 10000 || stat > 10100) { + /* The server is looney tunes. */ + return -EREMOTEIO; + } + /* If we cannot translate the error, the recovery routines should + * handle it. + * Note: remaining NFSv4 error codes have values > 10000, so should + * not conflict with native Linux error codes. + */ + return -stat; +} +EXPORT_SYMBOL_GPL(nfs4_stat_to_errno); + +/* + * This table is useful for conversion from local errno to NFS error. + * It provides more logically correct mappings for use with LOCALIO + * (which is focused on converting from errno to NFS status). + */ +static const struct { + int stat; + int errno; +} nfs4_errtbl_localio[] = { + /* Map errors differently than nfs4_errtbl */ + { NFS4ERR_IO, -EREMOTEIO }, + { NFS4ERR_DELAY, -EAGAIN }, + { NFS4ERR_FBIG, -E2BIG }, + /* Map errors not handled by nfs4_errtbl */ + { NFS4ERR_STALE, -EBADF }, + { NFS4ERR_STALE, -EOPENSTALE }, + { NFS4ERR_DELAY, -ETIMEDOUT }, + { NFS4ERR_DELAY, -ERESTARTSYS }, + { NFS4ERR_DELAY, -ENOMEM }, + { NFS4ERR_IO, -ETXTBSY }, + { NFS4ERR_IO, -EBUSY }, + { NFS4ERR_SERVERFAULT, -ESERVERFAULT }, + { NFS4ERR_SERVERFAULT, -ENFILE }, + { NFS4ERR_IO, -EUCLEAN }, + { NFS4ERR_PERM, -ENOKEY }, +}; + +/* + * Convert an errno to an NFS error code for LOCALIO. + */ +__u32 nfs_localio_errno_to_nfs4_stat(int errno) +{ + int i; + + /* First check nfs4_errtbl_common */ + for (i = 0; i < ARRAY_SIZE(nfs4_errtbl_common); i++) { + if (nfs4_errtbl_common[i].errno == errno) + return nfs4_errtbl_common[i].stat; + } + /* Then check nfs4_errtbl_localio */ + for (i = 0; i < ARRAY_SIZE(nfs4_errtbl_localio); i++) { + if (nfs4_errtbl_localio[i].errno == errno) + return nfs4_errtbl_localio[i].stat; + } + /* If we cannot translate the error, the recovery routines should + * handle it. + * Note: remaining NFSv4 error codes have values > 10000, so should + * not conflict with native Linux error codes. + */ + return NFS4ERR_SERVERFAULT; +} +EXPORT_SYMBOL_GPL(nfs_localio_errno_to_nfs4_stat); |