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Error Handling

This chapter describes how a standard ext2 file system must handle errors. The superblock contains two parameters controlling the way errors are handled. See section Superblock

The first of these is the s_mount_opt member of the superblock structure in memory. Its value is computed from the options specified when the fs is mounted. Its error handling related values are:

EXT2_MOUNT_ERRORS_CONT

continue even if an error occurs.

EXT2_MOUNT_ERRORS_RO

remount the file system read only.

EXT2_MOUNT_ERRORS_PANIC

the kernel panics on error.

The second of these is the s_errors member of the superblock structure on disk. It may take one of the following values:

EXT2_ERRORS_CONTINUE

continue even if an error occurs.

EXT2_ERRORS_RO

remount the file system read only.

EXT2_ERRORS_PANIC

in which case the kernel simply panics.

EXT2_ERRORS_DEFAULT

use the default behavior (as of 0.5a EXT2_ERRORS_CONTINUE).

s_mount_opt has precedence on s_errors.

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